135results about How to "Flexible height adjustment" patented technology

The invention discloses a multifunctional worktable for electric power maintenance. The multifunctional worktable comprises a base and a worktable. The base is connected with the worktable through telescopic rods. The telescopic rods comprise an inner telescopic rod and external telescopic rods. One inner telescopic rod is arranged and is located at the middle part of the base, and the upper end of the telescopic rod abuts against the bottom surface of the worktable. Four external telescopic rods are arranged at four corners of the base. According to the multifunctional worktable in which connection through the inner telescopic rod and the external telescopic rods is utilized, flexible height adjustment on the worktable can be performed, thereby satisfying use by persons with different heights and realizing high practicability.

The invention relates to a novel lifting device for a building. The novel lifting device comprises a support and a bottom plate. A left supporting rod is arranged at the left end of the bottom plate, and a right supporting rod is arranged at the right end of the bottom plate. A weighing sensor is arranged in the middle of the top of the bottom plate. A supporting plate is arranged above the bottom plate and is in sliding connection with the left supporting rod and the right supporting rod through a left supporting plate through hole and a right supporting plate through hole. The supporting plate is provided with a microcontroller, an LCD and a hydraulic cylinder. The top end of a piston rod of the hydraulic cylinder is connected with a top plate. The top plate is in sliding connection with the left supporting rod and the right supporting rod through a left top plate through hole and a right top plate through hole. The top plate is further provided with a left baffle and a right baffle. A front protection net and a rear protection net are arranged between the left baffle and the right baffle. A transverse inserting rod is inserted in a left baffle through hole of the left baffle in an embedded manner, a handle is arranged at the right end of the transverse inserting rod, and a limiting block is arranged at the left end of the transverse inserting rod. The part, located on the left of the left baffle, of the transverse inserting rod is sleeved with a spiral spring. A plurality of limiting clamping grooves are formed in the right side of the left supporting rod from top to bottom. By means of the above structure, the flexible height lifting adjustment can be conducted, and a constructor can be fully protected.

The invention relates to a support device, a belt conveyor and a mobile crusher, wherein the support device comprises a first support structure, a second support structure and a third support structure; the first end of the first support structure is hinged to a first base; the second end of the first support structure is used for hinge joint of a rack; the first end of the second support structure is hinged to a second base; the second end of the second support structure is in sliding connection with the rack; the first end of the third support structure is hinged to a third base; the second end of the third support structure is hinged to the first support structure; a power mechanism is arranged on the third support structure; the power mechanism can drive the third support structure to stretch out and draw back to drive the first support structure to rotate to further drive the rack to slide relative to the second support structure and adjust the height and dip angle of the rack. According to the invention, the height and dip angle of the rack can be flexibly adjusted.

The invention discloses an intelligent nursing device and a control method thereof. The intelligent nursing device comprises a mounting plate, driving wheel components are symmetrically arranged at four corners of the bottom surface of the mounting plate, a cleaning part is arranged in the middle of the bottom surface of the mounting plate, the top surface of the mounting plate is provided with anilluminating lamp, a loudspeaker, a temperature and humidity detection part, a voice recognition module, a control panel, a fire extinguishing part, a power supply and a bluetooth module, a motor frame is arranged in the middle of the top surface of the mounting plate, a second servo motor is arranged in the motor frame, a rotating platform is fixed at the top end of an output shaft of the secondservo motor, an alarm lamp is arranged on the outer side surface of the rotating platform, a lifting frame is arranged in the middle of the top surface of the rotating platform, a riding platform isfixed at the top end of the lifting frame, a visual detection sensor is arranged at the left end of the top surface of the riding platform, a steering engine is fixed at the right side surface of theriding platform, a mechanical arm extending rightwards is arranged at the bottom end of the steering engine, and a vital sign detection sensor is arranged on the mechanical arm. The intelligent nursing device is comprehensive in function and high in practicability.

The invention discloses a machine packaging box that also can serve as an expandable working table and a using method of the machine packaging box and belongs to the technical field of packaging. Themachine packaging box comprises a base, a shear mode lifting mechanism and a packaging box main body, wherein the packaging box main body is mounted on the base through the shear mode lifting mechanism and is of a cuboid structure composed of a box body bottom plate, box body side plates and a box body top plate; the four sides of the box body bottom plate are rotatably connected with four groupsof box body side plates; the rotational angle of each of two groups of opposite box body side plates is 90 degrees; the rotational angle of each of the other two groups of opposite box body side plates is 180 degrees; and the box body top plate is rotatably connected with one of the other two groups of opposite box body side plates with the rotational angle being 180 degrees. According to the machine packaging box, the original structure deforms to form the working table, so that the packaging box can package transportation products, also can be used as the working table of a machine and realizes two purposes, so that the cost of purchasing another working table is saved, resource waste caused by discard of the packaging box is avoided, and the machine packaging box has high expansion performance and practical value.

The invention discloses a solar photovoltaic bracket for automatically tracking the illumination angle. The solar photovoltaic bracket comprises a mounting rack, a fixing rod, a first photosensitive sensor, fixing parts, a hydraulic cylinder, a rotating plate, an electric motor, a first telescopic rod, an air pump, a second photosensitive sensor, a support rod, a fixing block, a second telescopicrod, an air cylinder, an annular guide rail, and a base. The hydraulic cylinder is used to control the tilt angle of the mounting rack, and the first photosensitive sensor and the second photosensitive sensor are used to detect the illumination angle, so as to control the rotation of the electric motor and to control solar photovoltaic panels to always face towards the illumination direction. Thefirst telescopic rod, the second telescopic rod and the annular guide rail are used to make the mounting rack move stably. The solar photovoltaic bracket of the invention can track the illumination, automatically adjust the position the mounting rack, reduce the working intensity, improve the utilization rate of the solar photovoltaic panels, improve the working effect, make the movement stably, can automatically remove the snow on the solar photovoltaic panels in winter and ensure the normal use of the solar photovoltaic panels.

The invention discloses a photosensitive adjusting submerged plant bed manufacturing method, characterized by comprising the following steps of 1, manufacturing of a planting bed 1: connecting four sides of a support layer 2 cut into a rectangular shape with a side wall layer 3, arranging a plurality of grids 4 on the support layer, placing planting baskets 5 in the grids, and filling the planting baskets with planting soil; 2, manufacturing of a photosensitive module: arranging a fixed pile 6 in the middle of the support layer 2, and arranging a photosensitive sensor 7 at the top end of the fixed pile 6, wherein the photosensitive sensor 7 is connected with a control module 8 disposed at the bottom end of the fixed pile 6; 3, manufacturing of a position adjustment module: arranging idler wheels 9, position sensors 10 and driving modules 11 at the four sides of the planting bed 1, connecting ropes 12 onto the idler wheels 9, connecting one ends of the ropes 12 with a metal block 13, and connecting fixed rods 16 with the idler wheels 9 through the other ends of the ropes 12. The fixed rods are fixed on the periphery of a pond. A submersed plant bed manufactured by the method is more intelligent and has a higher ornamental value in landscape construction.

The invention relates to a livestock feed casting test stand. The livestock feed casting test stand is characterized in that the test stand comprises a support; a material box is arranged on the support; scrapers are arranged inside the material box; a driving chain is arranged at the two ends of the scrapers; the rear part of the inside of the material box is provided with a baffle roller, a shifting roller and a feed casting auger sequentially from top to bottom; a weighing sensor is arranged between the support and the material box; a weighing display screen is disposed on the wall of the material box. The livestock feed casting test stand is a feed casting test stand of a cattle and sheep feeding car; the test stand can flexibly adjust rotating speeds of a scraper conveyor spindle, a feeding auger, the baffle roller and the shifting roller through a frequency converter; the interval of the scrapers can be adjusted through selection of different chain lugs; the position height of the baffle roller and the shifting roller of a feed casting car can be flexibly adjusted through moving of a device support; traveling feed casting of the feed casting car is simulated through relative motion of a static rack and belt conveyor driving.

The invention relates to the technical field of building machines and discloses an automatic wall whitewashing machine. The automatic wall whitewashing machine comprises a chassis (1), a vertical rod (2) perpendicularly connected with the chassis (1), and a plastering device (3) lifted up and down along the vertical rod (2). A hydraulic lifting system (4) is connected to the bottom of the plastering device (3), a stirring and extruding paddle (9) is arranged in the plastering device (3), a mortar discharging port (10) is formed in the plastering device (3), a plastering board (11) is connected below the mortar discharging port (10), a PLC control circuit (6) is arranged on the chassis (1), a laser thickness gauge (12) is arranged on the plastering device (3), a hydraulic rod (13) is connected to the back face of the plastering board (11), and the laser thickness gauge (12) and the hydraulic rod (13) are respectively connected with the PLC control circuit (6). According to the automatic wall whitewashing machine, because the whitewashing thickness is monitored through the laser thickness gauge and adjusted by adjusting the pressure of the hydraulic rod, the whitewashed wall is uniform and attractive, manpower is effectively saved, and production efficiency is greatly improved.

A cutting machine for cutting lower hems of skirts comprises a base, a support rod, a clothes hanger, and cutting scissors. The support rod is fixedly mounted on the base. The clothes hanger is disposed at the upper end of the support rod. A connecting rod is arranged on the cutting scissors and is rotatably connected with the support rod through a bearing. The bearing comprises a bearing body and a bearing sleeve; the bearing body sleeves the support rod and is connected with the connecting rod by welding. The cutting machine has the advantages that the cutting scissors are connected to a support frame through the bearing, the cutting scissors can accordingly rotate by 360 degrees around the lower hem of a skirt to be cut, on the clothes hanger, for cutting, and strictly uniform length of the lower hem is ensured; the connecting rod is a pneumatic lifting device, so that the height of the cutting scissors can be adjusted flexibly and easily.

The invention discloses an adjustable wheelchair seat lifting device which comprises a seat, a lifting plate, two connecting rods, two slide bases and a driving mechanism. The seat is arranged on a wheelchair in a liftable mode. The lifting plate is fixedly arranged at the bottom of the seat. The two connecting rods are located at the lower portion of the lifting plate in a crossed mode. The upper ends of the two connecting rods are respectively hinged to two ends of the lifting plate. The lower ends of the two connecting rods are hinged to the slide bases respectively. The driving mechanism is used for driving the two slide bases to move in the opposite directions at the same time. By driving the two slide bases to move in opposite directions, the two connecting rods can drive the lifting plate so as to drive the seat to rise and fall, the height of the seat can be flexibly adjusted, and therefore people who are inconvenient to walk can conveniently switch between the wheelchair and a bed.

The invention discloses a combined multi-ring and multi-hole construction device for intercepting cement concrete pile heads, and belongs to the technical field of intercepting cement concrete pile heads. The combined multi-ring and multi-hole construction device comprises a multi-ring and multi-hole ring body, wherein a fabricated power column is movably arranged at the circle center in the multi-ring and multi-hole ring body, a plurality of supporting frames are fixedly arranged to the circumference outer wall of a connecting sleeve in the ring array mode, the top part of the fabricated power column penetrates through a roof plate and extends to the bottom of an inner cavity of a shell, and a blade adjusting water injection mechanism in conjunction with four groups of blades and a hollowsteel sheet mechanism is movably arranged on the top part of the fabricated power column. The combined multi-ring and multi-hole construction device for intercepting the cement concrete pile heads adopts the blade adjusting water injection mechanism, a servo motor is driven according to the position of steel bars, through the rotation of a thread rod, a circular table movable block is downward, when the circular table movable block is downward, the blades around the circular table movable block are jacked and separately move outwards, the truncation area of the blades is adjusted to flexiblyadapt to the truncation of the concrete pile heads with different diameters, the quality of segmentation is greatly improved, and at the same time, the quality and efficiency of subsequent treatment of excess concrete materials are conveniently treated.

The invention discloses a mechanical trolley with convenience in loading and unloading goods. The mechanical trolley comprises a plate frame. A group of square sleeves is welded at one end of the plate frame, lifting plates are nested in the square sleeves, handles are welded on the tops of the lifting plates, a group of support legs is penetratingly arranged on the plate frame and is close to theend of the plate frame, a group of manual cylinders is detachably connected with the middle of the plate frame, lifting arms of the manual cylinders are connected with one another by lifting connecting rods, fixing frames are welded on two sides of the plate frame, the other end of the plate frame is hinged to a tipping bucket by a hinge pin, a detachable door is further inserted in the end, which is hinged to the tipping bucket, of the plate frame, bearing blocks are detachably connected with the bottoms of piston rods of the manual cylinders and are in running fit with a wheel axle, and wheels are connected with two ends of the wheel axle. The mechanical trolley with the convenience in loading and unloading the goods has the advantages that the height of the mechanical trolley can be flexibly adjusted, and accordingly the mechanical trolley can bring convenience for goods loading and unloading work and is beneficial to saving the physical strength of staffs and low in manufacturingcost.

The invention discloses a high pressure ground cleaning device of a sweeper in the technical field of environmental sanitation. The high pressure ground cleaning device of the sweeper comprises a rear fixed base which is detachably installed on a frame, a pair of lifting connecting rods, a front installation seat, a first linear telescopic movement mechanism, a height adjustment seat, a rotating seat, a spray mechanism, a second linear telescopic movement mechanism, a height position adjustment component capable of adjusting the height above the ground of the front installation seat, and a control system. The output ends of the first linear telescopic movement mechanism and the second linear telescopic movement mechanism can conduct reciprocating linear telescoping under the control of the control system, the rotating seat is rotatably installed at the front end of the height adjustment seat and can conduct horizontal rotation, the spray mechanism is installed on the rotating seat, and the ejection end of the spray mechanism is downwards arranged. The ground cleaning efficiency is high, the second linear telescopic movement mechanism conducts movements under the control of the control system to drive the rotating seat and the spray mechanism to swing, and thus the place through which the sweeper passes can be thoroughly cleaned.

The invention discloses a flight attendant etiquette training device which comprises a bottom plate, a lifting mechanism is fixedly mounted on one side of the top end of the bottom plate, a connecting rod is slidably clamped in the middle of the top end of the lifting mechanism, an adjusting mechanism is fixedly mounted at the top end of the connecting rod, and a top rod is rotatably arranged on the upper portion of the adjusting mechanism; buffering assemblies are fixedly installed at the four corners of the bottom end of the bottom plate, and a gradienter of a right-angle distribution structure is fixedly clamped to one side of the top end of the bottom plate. The lifting mechanism comprises a mechanism outer frame, and a bottom frame is fixedly installed at the bottom end of the mechanism outer frame. By arranging the lifting mechanism, the height positions of the connecting rod and the top rod are flexibly adjusted, and a back attaching arc plate and a shoulder attaching plate are made to be attached to the back and the shoulders of a flight attendant correspondingly; therefore, the auxiliary training of the flight attendants of different heights is effectively achieved, and the effect of etiquette training of the flight attendants is improved.

The invention relates to a mobile phone support. The mobile phone support comprises a sucker, a telescopic rod and a mobile phone clamp. The sucker is connected with one end of the telescopic rod, the other end of the telescopic rod is connected with the mobile phone clamp, the sucker is connected to one end of the telescopic rod through a connector, the connector comprises a sucker spanner, and the sucker is sucked or loosened by pulling the sucker spanner. The telescopic rod comprises multiple casing pipes, every two adjacent casing pipes are connected together in a sleeved mode, the mobile phone clamp is connected with the telescopic rod through a rotary sleeve, the mobile phone clamp comprises at least one clamping device, each clamping device at least comprises two clamping plates, an anti-skidding patch is arranged on the inner layer of each clamping plate, and the reliability of the mobile phone support for clamping a mobile phone is enhanced. The height and the angle of the mobile phone can be flexibly adjusted by changing the length of the telescopic pipes of the mobile phone support and the angle of the rotary sleeve, and the mobile phone is always located in an optimal position for being used and watched.

The invention discloses a double-pole positioning mechanism for a liquid crystal display screen in an exhibition. The double-pole positioning mechanism comprises two metal vertical poles arranged in parallel, and is characterized in that sleeve joints are respectively arranged on the two metal vertical poles at the same height in a sleeving mode; each sleeve joint is respectively adsorbed and fixed onto the corresponding metal vertical rod by virtue of a plurality of magnetic blocks arranged on the inner wall of the corresponding metal vertical pole. The double-pole positioning mechanism further comprises a support base strip arranged between the two sleeve joints; the two ends of the support base strip are respectively connected with the corresponding sleeve joints rotationally through ratchet self-locking rotating mechanisms; a liquid crystal display screen assembling board is fixed on the support base strip. The double-pole positioning mechanism is simple in structure and convenient to mount, the liquid crystal display screen is conveniently positioned, and the placement height and front and rear elevation angles of the liquid crystal display screen can be flexibly adjusted.

The invention relates to a double-mold-cavity laminated injection mold of a round air outlet grid. The injection mold sequentially comprises a first seat plate, a first mold foot, a first movable mold, a first fixed mold, a first hot runner plate, a second hot runner plate, a second fixed mold, a second movable mold, a second mold foot and a second seat plate, wherein the first movable mold and the first fixed mold are matched to form two mold cavities, and the second fixed mold and the second movable mold are matched to form two mold cavities; a guide pillar hole is further formed in the mold, and a stroke guide pillar is arranged in the guide pillar hole. According to present invention, the double mold cavities are additionally arranged on the basis of the double-mold-cavity laminated injection mold of the round air outlet grid, four products are injected in one injection molding period, the equipment utilization rate and the production efficiency are greatly improved, the cost is reduced, and the demand for the round air outlet grid is met.

The invention relates to the field of agricultural equipment, in particular to a saline-alkali soil peanut sowing mulch applicator and an operation method. The saline-alkali soil peanut sowing mulch applicator comprises a machine frame, the machine frame is used for supporting the whole device, a ditching device is arranged in front of the machine frame and can perform ditch digging, driving devices are arranged on the two sides of the lower part of the machine frame and can drive the device to move, and the driving devices are arranged below the machine frame so that a large ground clearance can be formed between the machine frame and the ground. A control box is arranged above the machine frame and used for controlling all power facilities, a sowing device is arranged above the machine frame and located behind the ditching device and can sow seeds into dug ditches, and a soil covering device is arranged above the machine frame and located behind the sowing device and can bury seeds in soil; and a film mulching device is arranged behind the machine frame and can cover the planted seeds with a mulching film. Peanut sowing and film mulching work can be easily and rapidly carried out.

The invention discloses a Chinese language and literature teaching board which comprises a group of support boards. An upright column is fixed onto the support board on each side of the Chinese language and literature teaching board, sleeves are movably connected with the upper ends of the upright columns, a U-shaped support is arranged between the two sleeves in a rotationally connected manner byrotary shafts, rocking handles are connected with the outer sides of the rotary shafts, fixing discs are fixed to the outer sides of the upper ends of the sleeves, a plurality of pin holes are formedin the fixing discs, connecting sheets are fixed to the inner sides of the rocking handles, hinge pins are inserted in the corresponding pin holes so that the connecting sheets and the fixing discs can be fixed to one another, dovetail slide grooves are formed in the inner sides of two ends of the U-shaped support, a quadrilateral frame is arranged on the inner side of the U-shaped support, connecting boards are fixed to two sides of the quadrilateral frame, dovetail sliders are connected onto the connecting boards and are slidably connected into the corresponding dovetail slide grooves, anda writing board is fixed to the inner side of the quadrilateral frame. The Chinese language and literature teaching board has the advantages that the Chinese language and literature teaching board issimple in structure and convenient to operate; the Chinese language and literature teaching board can be mounted on corresponding fixing frames, and accordingly the use height and angles of the Chinese language and literature teaching board can be flexibly adjusted.

The invention relates to a slit coating device with an improved support mechanism, and the slit coating device comprises a mold and the support mechanism. The support mechanism comprises a beam which is parallelly and correspondingly arranged below the mold; support parts which are arranged along the length direction of a beam at intervals and vertical to a support; a coupling mechanism of the support parts, the support parts are coupled to be able to be vertically ascended, descended and adjusted and moved along the length direction of the beam along with the thermal expansion and contraction along the length direction of the mold; a connecting plate component which comprises inner and outer connecting plates which are movably pin jointed through a pivot shaft and can be relatively swung in a plane which is parallel with the end surface at the length direction of the beam; a swing manipulation mechanism which is arranged to be able to drive the inner connecting plate to swing relative to the outer connecting plate; a fixed side plate which is fixed on a machine rack and is coupled with the outer connecting plate through a straight line sliding unit which is transversely horizontally arranged; and a pneumatic cylinder which is arranged to be capable of driving the outer connecting plate to horizontally move relative to the fixed side plate along the transverse direction. The slit coating device can simply flexibly carry out the adjustment of the position and the tilt angle of the mold and effectively eliminate the thermal stress caused by the thermal expansion and contraction of the mold.

The invention discloses a temporary support device for wind power generation, which comprises a moving mechanism and a fixed mechanism, wherein the fixed mechanism is arranged on the moving mechanism,and the moving mechanism is composed of antiskid supporting rods, lifting sliding slots, lifting sliding blocks, supporting plates, universal wheels, third hydraulic cylinders and a supporting bottomframe. The temporary support device is provided with the moving mechanism, the lifting of the universal wheels is realized through the third hydraulic cylinders when the temporary support device moves, and the temporary support device directly lifts the universal wheels and is supported by the supporting bottom frame when being supported and fixed, so that the structural flexibility of the support device is increased, and the temporary support device is enabled to be flexibly transformed between movement and fixation. The temporary support device is provided with first hydraulic cylinders andsecond hydraulic cylinders, thereby being capable of adjusting the angle of a fixing clamp sleeve. The height and angle of the support can be flexibly adjusted when the temporary support device is fixed, so that practicability of the support device is increased. The temporary support device is provided with a fixing lead screw and a fastening sliding block, thereby being capable of fixing tower piles with different diameters, and increasing the application range of the support device.

The invention discloses a microneedle array dry electrode based on a flexible substrate and a preparation method of the microneedle array dry electrode. The method includes the steps that needle tipsof metal microneedles are inserted downwards into a base with a plurality of micro-through holes which are not connected with one another to form a microneedle array; the needle tips of the arranged microneedle array are placed upwards in a groove, and a conductive prepolymer is added into the groove to be solidified and molded into the flexible conductive substrate; and the substrate with the micro-through holes is separated from the conductive microneedle array, and the microneedle array dry electrode based on the flexible substrate is obtained. The microneedle array dry electrode includes the metal microneedle electrode array and the flexible conductive substrate, and the flexible conductive substrate is combined with the metal microneedles to prepare the microneedle dry electrode; andthe preparation method is simple, the cost is low, the microneedle electrode strength is high, the safety is high, long-time and high-efficiency signal acquisition is realized advantageously, and themicroneedle array dry electrode can be widely applied to the technical field of medical apparatus and instruments.

The invention discloses decorative plasterboard vibration molding equipment, which comprises a workbench (11) with a vibrator (13), a bottom die adjusting device (9) arranged on the workbench, a bottom die (7) arranged on the bottom die adjusting device, a bracket (1) arranged on the workbench, a rotary rack (2) arranged on the bracket and positioned above the workbench and capable of rotating, a top cap adjusting device (5) arranged on the rotary rack, and a top cap (3) arranged on the bottom surface of the top cap adjusting device. The product produced by the equipment has the advantages of straight board edge, precise groove and tongue, uniform thickness, consistent rim size, high size precision, high breaking strength, deformation resistance and stable quality; and the equipment can manufacture tongue-and-groove surfaces of various shapes, and can reduce the technical requirement for workers and the labor intensity.

The invention discloses an advertising board convenient to mount and dismount, and relates to the related technical field of advertising boards. The advertising board comprises a mounting base and a supporting table; first through holes are symmetrically formed in the bottom in sliding clamping grooves; sliding blocks are slidably connected into the sliding clamping grooves, and mounting columns are fixedly connected to the upper surfaces of the sliding blocks. A connecting column is fixedly connected to the lower surface of the sliding block, and one end of the connecting column penetrates through the first through hole and is fixedly connected with a first movable plate; one side face of one first movable plate is rotationally connected with a two-way threaded rod; a sliding block is slidably connected into the second through hole, and one side face of the sliding block is fixedly connected with a second movable plate; the peripheral side faces of the advertisement board supporting blocks are in sliding fit with the inner walls of the sliding grooves. Through the design of the sliding clamping grooves, the two-way threaded rods, the second through holes, the first movable platesand the first motors, the distance between the opposite mounting columns can be flexibly adjusted, mounting of advertising boards of different widths and sizes is met, operation is convenient, and practicability is high.

The invention discloses a lifting mechanism for a reclaiming trolley, and relates to the technical field of automatic casting equipment. The lifting mechanism comprises a handle (1), a flange (2), bevel gears (3), a base (4), a transmission screw rod (5), a limiting block (6), a lifting table (7) and a support block (8), wherein the flange (2) is arranged on the base (4); one end of the handle (1) passes through the flange (2) and is arranged on the base (4) through a flanged shaft sleeve and a shaft elastic retainer ring; the support block (8) is arranged inside the base (4); one side of the transmission screw rod (5) is connected to the support block (8); two bevel gears (3) are arranged at one end of the handle (1) and one end of the transmission screw rod (5) respectively through flat keys, and the two bevel gears (3) are matched with each other; the limiting block (6) is arranged on the other side of the transmission screw rod (5); the lifting table (7) sleeves the transmission screw rod (5). The lifting mechanism has the advantages of easiness in operation, flexibility in height adjustment, simple mechanical structure, safety, low manufacturing cost, easiness in installation and convenience in maintenance.

The invention discloses a laboratory test tube stand which comprises a base and test tubes. The middle of the bottom of the base is connected with a base plate through an arranged lift mechanism, an auxiliary support member is arranged at the top of the base along the diagonal position, a tube body location plate is arranged in the middle of the top of the base, insertion holes which are evenly distributed are formed in the surface of the tube body location plate and the surface of the base, and the test tubes are movably inserted into the insertion holes. The laboratory test tube stand is ingenious in structure and reasonable in design. By means of the auxiliary support member, the storage amount of the test tubes of the test tube stand can be increased, the test tubes in the test tube stand can be flexibly moved in experiments, the test tubes can be arranged in the test tube stand to observe the phenomena generated in the test tubes in the experiments when different chemical experiments are performed, the danger caused by taking the test tubes by hand to observe the experiment phenomena is avoided, and the use safety of the test tube stand is further improved.