152results about How to "Reduce the grip" patented technology

A powered rope ascender that supports a person or a load while ascending a vertical rope. The rope ascender has a motor driven capstan drum that engages the rope. A pinch roller grips the rope against the capstan drum. A load limiting assembly releases the grip by the pinch roller when the load supported by the ascender exceeds a predetermined amount. A centrifugal clutch reduces starting torque required by the motor and the outer drum of the centrifugal clutch interacts with a brake to hold position on the rope. For heavy loads a motion activated brake is used. Hand controls provide a freewheeling, a braking and an ascending mode of operation. A harmonic drive or planetary reduction gears provide speed reduction from the motor to the capstan drum. The powered rope ascender can be threaded on the rope without access to a rope end.

The invention provides an axial embedded blast hole of a reinforced concrete beam and a blasting demolition method. The blast hole is formed in the mode that a pipe is embedded in the beam in the axial direction, continuous or discontinuous charging is adopted in the blast hole, a detonating fuse is arranged in the blast hole in an overall-length mode, a stirrup is cut off, and other technical means are taken. In this way, drilling operation is avoided, the number of blast holes and the number of detonators are reduced, consumption of explosive and the detonators is reduced, the smashing effect on reinforced concrete is improved, and the damage of explosion to the environment is reduced. The axial embedded blast hole of the reinforced concrete beam and the blasting demolition method can bring remarkable economic and social benefits.

The invention discloses an automatic pore generation ultrahard abrasive grinding tool and a method for dressing the same. The grinding tool at least consists of abrasive grains, a bonding agent and a 'soluble' filling agent. The 'soluble' agent soluble in a certain solvent is added into the bonding agent of the automatic pore generation ultrahard abrasive grinding tool, and a layer of the 'soluble' filling agent can be coated on the ultrahard abrasive grain surface layer according to requirement. The 'soluble' filling agent and the bonding agent act together to hold the abrasive grains and ensure excellent strength of the grinding tool. In a grinding process of the grinding tool, when the abrasive grains on the surface of the grinding tool are passivated and the grinding tool needs to be dressed, the method can deliver the certain solvent to the surface of the grinding tool to dissolve the 'soluble' filling agent on the surface layer of the grinding tool and generate pores in the bonding agent to reduce the structural strength of the bonding agent and holding force of the bonding agent to the sounding abrasive grains and make the abrasive grains on the surface layer of the grinding tool easy to fall off, thereby automatically dressing the grinding tool and revealing new abrasive grains.

The invention provides a method for roughly trimming a diamond grinding wheel. The method includes steps of A, scanning the surface of the diamond grinding wheel, acquiring the highest point of the surface of the grinding wheel and determining the position of the highest point in radial, axial and generating line directions; B, emitting a focused pulse laser beam along the inner normal direction of the surface of the grinding wheel and enabling the position of a focal spot of the focused pulse laser beam to be coincided with the position of the highest point of the grinding wheel in the radial, axial and generating line directions; C, erecting a silicon carbide roller at a position opposite to a generating line of the grinding wheel and setting the cutting depth as 0.005mm; and D, repeating the steps once after the grinding wheel is trimmed for 3 to 5 minutes until a circle run-out error of the grinding wheel is not larger than 20 micrometers. The method has the advantages that diamond grains are ablated and directly removed by the focused pulse laser beam, remaining diamond grains are removed by the silicon carbide roller, deteriorative layers of surfaces of the grains which are ablated by laser, grains without holding force and the like are mechanically peeled off, and the method is applicable to efficiently roughly trimming diamond grinding wheels with large grains.

Rotary device for transferring containers, with a base (21) rotating about an axis (23) and supporting a mobile assembly (25) comprising: a main arm (26) pivoting (27) on the base, a gripping pincer (30) at the free end of the main arm, and a rotary roller (32) which is solidly connected to the main arm and interacts with a fixed curvilinear cam (33) with a closed contour; the pivot shaft (27) and the free end of the main arm define a line (L) which extends approximately tangentially to the circular trajectory of the pivot axis, which precedes the free end of the arm in the direction (F) of rotation of the base; the cam is such that, when the base rotates, the end of the main arm is moved approximately radially; and the gripping pincer mounted on the free end of the main arm follows a predetermined circular path, having inverse convexity with respect to the trajectory of the rotary base, within a fixed angular range (a) of rotation of the base.

The invention discloses a preparing method of a ceramic bonding agent CBN (Cubic Boron Nitride) grinding wheel with a precisely adjustable and controllable hardness attenuation value. The preparing method comprises the following steps that: 16 to 20 weight percent of boric acid, 9 weight percent of sodium carbonate, 5 weight percent of potassium carbonate, 8 weight percent of aluminum oxide, 4 weight percent of titanium dioxide, and 54 to 58 weight percent of silicon dioxide are pretreated; bonding agents are prepared through smelting; the bonding agents are crushed; the bonding agents are subjected to ball milling; 15 to 23 weight percent of bonding agent powder, 72 to 80 weight percent of CBN grinding materials, 3 weight percent of yellow dextrin powder and 2 weight percent of deionized water are poured into a grinding jar, ball milling is carried out, and grinding wheel forming materials are prepared; a grinding wheel is formed after pressurizing and drying; the grinding wheel is sintered; a buffer solution is prepared; and the buffer solution is utilized for adjusting and controlling the hardness of the grinding wheel, and the ceramic bonding agent CBN grinding wheel with the precisely adjustable and controllable hardness attenuation value is prepared. The preparing method has the advantages that the hardness of the prepared ceramic CBN grinding wheel is precise and controllable, the ceramic CBN grinding wheels which have different hardness and are suitable for being used for grinding different materials are obtained, and the grinding performance of the ceramic CBN grinding wheel is improved.

The invention relates to diamond tools and provides a preparation method of a metallic bond tool bit and a diamond saw web comprising the metallic bond tool bit. The metallic bond tool bit prepared through the method is high in diamond mechanically holding force and acquires appropriate wearing resistance to meet the market development requirements and the cutting requirements of various marble slabs; meanwhile, the sintering temperature range of the metallic bond tool can be expanded, adverse effects caused by sintering conditions such as non-uniform thermal conduction and edge-center temperature difference of graphite molds can be reduced, the sintering temperature can be increased, the material wastage rate can be reduced, and the quality of sintered tool bits can be improved; the welding tolerance temperature can be increased, the selecting range of welding materials can be expanded, and swelling and foaming of matrixes during secondary welding heating of the tool bit can be avoided; besides, the preparation method of the metallic bond tool bit is easy to implement, applicable of large-scale production and high in practicality.

An input device for a computer is described that positions the user's hand in a more ergonomically desirable position, i.e., at an angle of about 45° to the work surface. In preferred embodiments, the input device accommodates either a user's left or right hand, and in either case, positions the hand in an ergonomically desirable position. In another embodiment, the length of the input device of the present invention is adjusted for the size of the user's hand. In further embodiments, the input device of the present invention provides a palm rest. Other desirable features included in preferred embodiments include lateral buttons that are positioned one above the other.

A clutch mechanism includes a bolt threadably received by a drive shaft and configured to secure the blade on an inner washer disposed about the drive shaft. The clutch mechanism also includes a spring assembly that is generally annularly disposed around the bolt. When the spring assembly is compressed, the spring assembly is configured to grip the blade inner washer and the spring assembly. At least one shallow pocket and at least one deep pocket are disposed in a lower surface of an upper retainer, and at least one geometric spacer extends from the spring assembly. In the coupled condition, the geometric spacer is engaged with the shallow pocket, and in the uncoupled condition, the plug structure is engaged with the deep pocket.

The invention relates to an all-terrain track chain plate device. The all-terrain track chain plate device comprises a chain plate device, a substrate, a buffer backing plate and multiple supporting nail assemblies, wherein the buffer backing plate is arranged on the substrate; multiple corresponding round holes which correspond to one another are formed in the buffer backing plate and the substrate; one supporting nail assembly is arranged in each round hole and is formed by a movable nail, a tube, a sealing ring and a spring; the springs are arranged at the bottom parts of the tubes; the movable nails are arranged at the other end of each of the springs; annular grooves are formed in the bottom parts of the movable nails in the circumferential direction, and the sealing rings are arranged in the annular grooves in a sleeving way. According to the all-terrain track chain plate device disclosed by the invention, firstly, the phenomena that on a small-sized / mini-type tracked vehicle, since a track chain plate is small in friction force when being in contact with the pavement, and the road holding capacity of the vehicle when traveling on a soft pavement, a water-accumulated or snow-accumulated pavement or a large-slope pavement is reduced, track slippage is caused are solved; secondly, the impact and the noise which are caused between the chain plate and the pavement when the track moves are reduced; finally, through the supporting nails with elastic damping action tubes, the impact energy of the pavement can be absorbed under a complex road condition and can be slowly released, and thus the track can move more stably.

The invention relates to a soluble fixed soft abrasive-polishing film, which comprises an abrasive layer and a substrate layer and has the thickness of 0.3 to 5mm. A soluble high-molecular material is used as a bonding agent of the abrasive layer, and a certain proportion of multilayer particle-diameter soft microfine abrasives are distributed and coated on the elastic substrate according to a certain rule. Small-particle-diameter abrasive particles not only can directly participate in a polishing process, but also can be used as a filling material and achieves the effect of supporting large particles, so that the content of a resin bonding agent in the polishing film is decreased, and the problems of film surface cracking and breakage are effectively solved. A specific nonpoisonous and harmless aqueous solvent is adopted in the machining process to solve the bonding agent on the surface layer of the polishing film, so that the holding force of he bonding agent for the abrasive particles is decreased to enable the bonding agent to fall off; on one hand, the passivated abrasive particles on the surface layer can be removed, so that the polishing film has more lasting polishing performance; on the other hand, the abrasive particles which are fixed on the surface of the polishing film and the abrasive particles which fall off and are dispersed into a polishing solution jointly act on a workpiece, so that the ultra-smooth high-efficiency surface polishing of the workpiece can be realized.

The invention discloses a heat-resistant anti-impact grinding wheel material. The heat-resistant anti-impact grinding wheel material is prepared from diamond, silicon carbide whiskers, aluminum borate whiskers, potassium titanate whiskers, aluminum oxide whiskers, yttrium oxide, cerium oxide, feldspar, fluorite, modified phenolic resin, polyurethane resin, polyethylene wax emulsion, calcium lignosulphonate, slag, glass fibers, carbon fibers, a pore forming agent and alloy powder. The heat-resistant anti-impact grinding wheel material is reasonable in composition. An obtained grinding wheel is excellent in bending strength, microhardness, impact toughness, wear resistance, heat dissipation performance and heat resistance, not likely to burst apart and high in safety coefficient and meanwhile has the beneficial effects of being high in grinding efficiency and grinding ratio, good in grinding quality, long in service life and the like. Good economic benefits are achieved.

Disclosed is a high-capacity tire, capable of improving uneven-wearing resistance performance and wet-path ground-gripping performance. A plurality of transverse grooves are arranged at the section from the internal circumference to the land part of the two sides of the tire equator C. The transverse grooves are formed to have an S-shaped structure, composed of external arc groove of tread side having the radius of curvature of R1 and an internal arc groove having the radius of curvature of R2. One side of the external arc groove closer to the circumferential direction of the tire than the transverse groove is provided with an arc center i 1. The other side of internal arc groove closer to the circumferential direction of the tire than the transverse grooves is provided with an arc center i 2. The radius of curvature R2 mentioned above ranges from 10 to 40 mm. Moreover, the radius of curvature R1 is less than radius of curvature R2, with the difference thereof less than 5mm. The central angle alpha of the external arc groove and the central angle beta of the internal arc groove range from45 to 90 degrees.

Instant Reading Oil Dipstick Improvements is a near universal design with most assembly done by the manufacturer. The customers can easily adapt such to match their existing dipstick geometry by pushing the adjustable parts to the correct location, where they will remain. The air valve is within a single, machined brass cone that adapts to the metal tube and seals in the engine vacuum. A new tubular plastic air seal around the wire handle increases reliability. And a cone shaped rubber squeegee will automatically remove oil from the outside of the tubing as the dipstick is withdrawn from the crankcase.

The invention discloses an electronic device. The electronic device comprises a first part, a connecting part, a second part and a display unit. The first part has a first end, a second end, and a first surface and a second surface which are opposite. The connecting part has a third end, a fourth end, and a first surface and a second surface which are opposite, wherein the third end is connected with the second end. The second part has a fifth end, a sixth end, and a first surface and a second surface which are opposite, wherein the fifth end is connected with the fourth end; the first surface of the first part, the first surface of the connecting part and the first surface of the second part form a first outer surface of the electronic device, and can relatively rotate based on the connecting part, the first part and the second part. The display unit is at least arranged on the first surface of the first part. The electronic device at least has a first pose; and under the first pose, the first surface of the first part and the first surface of the second part are in a parallel or approximately parallel state, and a first region of the display unit can be perceived.

The invention relates to a pull type direct pulling device which comprises a direct pulling head, a reaction rack, a pressure sensor and a stress application mechanism, wherein the direct pulling head comprises a pull rod and a pull head connected with the lower part of the pull rod; the pull head comprises a hoist block, a jacking thread sleeve, a fixed plate, claws and a link mechanism, the hoist block is in threaded connection with the pull rod, the jacking thread sleeve is in threaded connection with the pull rod under the hoist block, the fixed plate is sheathed outside the jacking thread sleeve through a first bearing bush, the fixed plate is uniformly provided with at least three fixed plate connecting rods, the claws are positioned under the fixed plate, and the number of the claws is the same as the number of the fixed plate connecting rods. The fastening force is enhanced along with the enhancement of the pull force when a concrete core sample is pulled by the pull type direct pulling device, so that the situations that the concrete core sample is smashed by clamping, or is slipped out and fall off from a mechanical direct pull head cannot happen. The pull type direct pulling device is formed by adopting rods, the weight of the pull type direct pulling device can be reduced, and the pull type direct pulling device is more convenient to use.

The invention relates to a chain tension adjusting device of a rear derailleur for a bicycle. The chain tension adjusting device is characterized by comprising a base, a tension adjusting mechanism, a tension transmission assembly and a radial pressure control assembly, wherein the base is provided with an inner cavity for containing the tension adjusting mechanism; the tension adjusting mechanism comprises a rotary shaft which is rotationally arranged in the base, one end of the tension adjusting mechanism is fixed to a chain guiding component, and the other end of the tension adjusting mechanism is pivoted to the interior of the base; one end of the tension transmission assembly is limited in the base, and the other end of the tension transmission assembly acts on the chain guiding component; the radial pressure control assembly presses the rotary shaft in the radial direction; and the first swing direction and the second swing direction are around the axis of the rotary shaft and are opposite. The chain tension adjusting device has the effects that the chain guiding component swings within a certain range, tension is adjusted to be proper, when the adjusting force on the tension transmission assembly and the tension of a chain are balanced, the chain guiding component is relatively fixed to one position, the situation that the chain guiding component is affected by vibration and accordingly swings in the second swing direction is avoided, the tension of the chain is fixed, and the chain is prevented from being disengaged.

The invention discloses a portable mowing machine based on a movable bottom plate. The portable mowing machine based on the movable bottom plate comprises a handrail rack, an engine, a clutch, a shaft sleeve, a transmission shaft and a cutter, wherein the clutch is a centrifugal clutch; the transmission shaft consists of a transmission shaft I and a transmission shaft II, and the two ends of the transmission shaft I are respectively connected with a driven cup of the centrifugal clutch and a driving conical gear arranged in a gearbox; a driven conical gear which is fixedly connected onto the transmission shaft II which is fixedly arranged in the gearbox through a bearing is engaged with the driving conical gear on the transmission shaft I; a sun gear, an inner gear ring and a knife rest circular disc are sequentially and fixedly connected onto the transmission shaft II which stretches out of the gearbox; planet gear shafts are uniformly distributed on the bottom end of the gearbox along the circumferential direction, the ends of the planet gear shafts stretch out of the gearbox, and planet gears which are respectively and fixedly connected onto the planet gear shafts are engaged with the sun gear and the inner gear ring; a pair of upper blades on the outer edge of the inner gear ring are movably fit with a pair of lower blades on the outer edge of the knife rest circular disc; the bottom end of the transmission shaft II is connected with a circular disc bottom plate through an external spherical surface ball bearing.

Machine (1) used in plants for making puree or fruit juice starting from vegetable or animal food, such as a rough extractor or a fine extractor, comprising a cylindrical body (2) having an inlet (3) for the product to treat, an outlet (4) for part of product that can be used and an outlet (5) for part of product to dispose of. The product put in the cylindrical body (2) of the machine (1) is pushed by centrifugal force of a plurality of blades of an armature (6) to pass through a sieve (7) having holes (8) and having a cylindrical or conic shape. The armature (6) is wheeled by a motor through a shaft (15). The machine (1) has a plurality of holes or nozzles (11) suitable for supplying in the sieve (7) a flow of washing liquid, for example water or diluted juice, in longitudinal direction, or radial direction, with respect to the machine (1), so that the blades of the armature in quick rotation forced it by centrifugal force against the inner surface of the sieve.

The invention relates to a pneumatic boost serial loose hinge flexible multi-finger claw, which consists of a palm and three flexible fingers, wherein the palm has two structures, namely a rectangular structure and a hexagonal structure; the flexible fingers have the same structure which mainly comprises an inner guide cylinder and a serial loose hinge; the hinge mandrel of the serial loose hinge is providedwith a torsional spring; the characteristic parameters and the pretightening angle of the torsional spring are optimized according to the characteristics of a grasped object; grasping force is generated under the drive of the cylinder, and the multi-finger claw is applied to grasping fragile objects or special objects with changing shapes and sizes; and the flexible fingers of the multi-finger claw have the characteristics of good flexible degree of freedom and buffer performance to an external load and high flexible adaptiveness. The pneumatic boost serial loose hinge flexible multi-finger claw belongs to the field of application of robot and mechanical and electrical integration; and when the pneumatic boost serial loose hinge flexible multi-finger claw is connected with a robot body, the pneumatic boost serial loose hinge flexible multi-finger claw is particularly suitable for the fields of production and logistics such as grasping, sorting and packaging of foods, agricultural products and light industrial products.

The invention discloses a charging, blocking and slag pressing structure of demolition blasting blast-holes of a reinforced concrete beam and a demolition blasting method. The demolition blasting method is characterized in that the technical measures of disconnecting stirrups arranged at one side or two sides of the reinforced concrete beam, blocking the blast-holes by using gypsum which is mixed with an adhesion agent and pressing the blast-holes by using water bags are adopted, and thus the contradiction between the demolition blasting effect of the reinforced concrete beam and safety as well as between the demolition blasting effect and environment protection is well solved. The charging, blocking and slag pressing structure and the demolition blasting method, disclosed by the invention, have the beneficial effects that the technical measures are jointly adopted, thus the bounding stress of the stirrups on concrete during blasting is reduced, the blasting and crushing effect is improved, and blasting safety protection and blasting dust control are facilitated; the construction is convenient, the explosive consumption and the post processing and cleaning cost are reduced, and significant economic and environment benefits are obtained.