69results about How to "Quick tension" patented technology

A method and apparatus for tensioning a staggered anchorage comprised of a plurality of tension members, which are anchored in a bore hole at various depths, thus having different free steel lengths. For each staggered anchorage, each tension member is tensioned up to a predetermined maximal load and is then subsequently adjusted to the working load. To achieve a consistent elongation reserve of the individual tension member and thus to increase the security of a staggered anchorage, the staggered anchorage is adjusted to the working load, all tension members are adjusted to a reduced elongation (ΔIw) by a uniform elongation difference (ΔImax−ΔIw) relative to the respective elongation (ΔImax) of the predetermined maximal load. An arrangement for performing the method has a single tensioning plane, which is force interconnected with defined locking elements that are arranged on tension members in clamping planes.

A tie-down and tensioning device including: a device body; an attachment member connected to the device body, the attachment member including an attachment opening; a cord block comprising a cord block hook connected to the device body, and a cord support surface disposed between the cord block hook and the device body; and a cord gripper attached to the device body, the cord gripper comprising a cord gripper hook connected to the device body, the interior surface of the cord gripper hook and the surface of the device body opposing the interior surface of the cord gripper hook defining a wedge-shaped opening, and a cord gripping surface formed on one of the interior surface of the cord gripper hook and the opposing surface of the device body.

A device for producing fiber preforms including a plurality of unwind stations, a plurality of grippers and at least one first molding tool. Further, a method includes the successive steps of tensioning threads or rovings for a first layer with grippers, draping the first layer over a first molding tool, severing of the threads or rovings of the first layer, tensioning threads or rovings for a second layer with grippers, draping an additional layer over the first forming tool, and severing the threads or rovings of the second layer.

The invention discloses a band-sawing machine for carpenters. The band-sawing machine comprises a machine frame, an upper shield, a lower shield, a workbench, an upper saw clamp, a lower saw clamp, an upper wheel and a lower wheel. The upper wheel is arranged in the upper shield, the upper wheel is arranged on a shaft, and the shaft is arranged on a fixing frame. The upper end of the fixing frame is connected with a connecting frame, and the lower end of the fixing frame is connected with an adjusting plate. The connecting frame is fixed to a panel of the upper shield through a bolt. A deviation adjusting nut is arranged at the lower portion of the panel of the upper shield, the deviation adjusting nut is connected with an adjusting pin, and the adjusting pin penetrates through the panel of the upper shield to be in contact with the adjusting plate. An adjusting handle is arranged on the panel of the upper shield, and the adjusting handle is connected with the fixing frame. By the adoption of a novel saw clamping structure, the band-sawing machine for carpenters has better and more stable guiding performance. An air spring is adopted for assisting the workbench in adjusting the inclined degree, and an automatically adjusting function is achieved. An efficient, fast, and convenient adjusting and tension device is adopted to conduct fast adjusting and tensioning on a saw wheel, the use requirement is met, and economic efficiency is improved.

A quick-release device of a bicycle brake cable includes a brake arm mounted on a frame of the bicycle, a guider selectively slidably mounted on a free end of the brake arm and a safe lever pivotally mounted in the brake arm. The brake arm includes a groove defined along an axis thereof. The guider is hollow to allow the brake cable extending therethrough. The safe lever includes a pivot point that divides the safe lever into a press portion and a stop portion extending toward the guider to prevent the guider from an accidental operation due to an improper force.

A device for producing fiber preforms includes a plurality of unwind stations, a plurality of grippers and at least one first molding tool. Each gripper is movable on a path between a maximum position and a pick-up position. The pick-up position is provided at a thread transfer point and is closer to the unwind station than the maximum position. The first molding tool has a draping position in the region of the connecting lines between the maximum position and the thread transfer points, and a starting position outside the connecting lines. A thread tension control for the threads or rovings is provided.

A method and apparatus for tensioning a staggered anchorage comprised of a plurality of tension members, which are anchored in a bore hole at various depths, thus having different free steel lengths. For each staggered anchorage, each tension member is tensioned up to a predetermined maximal load and is then subsequently adjusted to the working load. To achieve a consistent elongation reserve of the individual tension member and thus to increase the security of a staggered anchorage, the staggered anchorage is adjusted to the working load, all tension members are adjusted to a reduced elongation (ΔIw) by a uniform elongation difference (ΔImax−ΔIw) relative to the respective elongation (ΔImax) of the predetermined maximal load. An arrangement for performing the method has a single tensioning plane, which is force interconnected with defined locking elements that are arranged on tension members in clamping planes.

The invention provides a device for adjusting plant spacing of a potato seeder, which is characterized in that a driving shaft and a driven shaft are supported on a support, a driving sprocket wheel is arranged on an stretching end of the driving shaft through the support, a driven sprocket wheel is arranged on an stretching end of the driven shaft through the support, one end of a revolving shaft arranged with an adjusting wheel is fixed on the support, two pins arranged with tensioner sprockets are fixed on a transverse plane of the adjusting wheel, a same chain is hanged on the driving sprocket wheel, the driven sprocket wheel and two tensioner sprockets, the chain is hanged on the tensioner sprocket close to a center line of the driving sprocket wheel and the driven sprocket wheel and close to one side of the center line of the driving sprocket wheel and the driven sprocket wheel, and far from the tensioner sprocket of the center line of the driving sprocket wheel and the driven sprocket wheel, and far from one side of the center line of the driving sprocket wheel and the driven sprocket wheel, one end of a spring is hanged on a hook of the adjusting wheel, and the other end is hanged on an end which is clamped on a pair of arc hooks of a circle chain. The device has the advantages of convenient adjustment of plant spacing and wide application scope.

The invention discloses a pre-tightening and force-limiting anti-attenuation mechanism of a pre-tightening and force-limiting safety belt. The pre-tightening and force-limiting anti-attenuation mechanism comprises a mounting disc, a ratchet wheel which is rotatably arranged in the mounting disc, a pre-tightening wheel which is rotatably arranged in the mounting disc and is connected with the bottom end of the ratchet wheel to form a whole body, and an instantaneous transmission mechanism which is communicated with the circumferential direction of the mounting disc and is used for transmittinga driving force to the pre-tightening wheel when the safety belt needs to be tightened, wherein the ratchet wheel is connected with a winding shaft for winding the safety belt. Therefore, the pre-tightening wheel is connected with the ratchet wheel to form the whole body; when the instantaneous transmission mechanism transmits the driving force to the pre-tightening wheel, the pre-tightening wheelcan drive the ratchet wheel to rotate synchronously, and the ratchet wheel is connected with the winding shaft, so that the winding shaft is driven to rotate synchronously, and furthermore, the safety belt is rapidly wound; the safety belt is rapidly tensioned and a passenger in a vehicle is fastened on a seat. The invention further discloses the pre-tightening and force-limiting safety belt andthe pre-tightening and force-limiting safety belt has the beneficial effects above.

The invention relates to a belt cutting machine. The belt cutting machine comprises a cutting platform, a first roller, a second roller, a driving motor, a cutting device and a stabilizing device, wherein one end of the first roller is rotatably fixed to the cutting platform; one end of the second roller is rotatably fixed to the cutting platform and the second roller is parallel to the first roller; the second roller can move front and back in the direction close to or far from the first roller; the driving motor is used for driving the second roller to rotate; the cutting device comprises a cutter, and the cutter is arranged at the end, opposite to the second roller, of the first roller and can move front and back in the direction close to or far from the first roller and move left and right in the direction parallel to the first roller; and the stabilizing device comprises a first abutting rod abutting against the end of the first roller and a second abutting rod abutting against the end of the second roller. The belt cutting machine can efficiently and rapidly cut an annular belt into small annular belts of different widths and is stable in cutting, and the edges of the belts are not oblique.

A differentially tightenable ski boot includes a lower shell and an upper cuff that is pivotally coupled with the lower shell. The ski boot includes a first tightening system that is coupled with the lower shell and a second tightening system that is coupled with the upper cuff. Each tightening system includes a reel based closure device, a tension member that is operably coupled with the reel based closure device, and at least one guide member that routes or directs the tension member along a path about the lower shell or upper cuff. The first tightening system and the second tightening system are operable independently of each other to independently and differentially tightening the lower shell and the upper cuff.

A quick-release device of a bicycle brake cable includes a main frame mounted to a handlebar of the bicycle, a lever pivotally mounted to the main frame and a push device mounted in the main frame to normally push the lever for selective changing the position between the lever and the push device and the tension of the brake cable.

The invention aims to provide a connecting assembly and a water heater, and is used for solving the problem that a water heater is low in assembling efficiency. The connecting assembly comprises a first connecting rod, a second connecting rod, an elastic piece, a first hook part and a second hook part, wherein a first end of the first connecting rod is hinged to a first end of the second connecting rod; the elastic piece acts on the first connecting rod and the second connecting rod; by the elastic piece, the first connecting rod and the second connecting rod get close to each other during rotation; the relative distance between a second end of the first connecting rod and the first hook part is not changed; the second hook part can move along with a second end of the second connecting rod; and the first connecting rod and the second connecting rod rotate relatively so that the first hook part and the second hook part can get close to each other or away from each other. By the elastic piece, an included angle between the first connecting rod and the second connecting rod is controlled; and by the hook parts, quick connection can be realized, and assembly efficiency is improved.

The invention discloses a non-woven cotton cloth rolling, tensioning and cutting device for beauty makeup, which comprises a bottom frame and a supporting frame, a lifting adjusting seat is inserted into a top plate of the bottom frame, a rotating shaft is inserted into the lifting adjusting seat, right-angle bending plates are fixed to the left end and the right end of the rotating shaft correspondingly, the horizontal parts and the vertical parts of the two right-angle bending plates are provided with cutting bases and tensioning rollers correspondingly, and a pressing base and a cutter are arranged below the top plate of the bottom frame. The device has the advantages that a tensioning device and a cutting device are combined together, rapid switching between the tensioning rollers and the cutting bases can be achieved through rotation, in addition, by arranging a tension spring, a lifting clamping block, a transmission cam and other parts, continuous tensioning in the cloth rolling process can be achieved, and when cutting is conducted on the cutting bases, the cutting bases can jack up cloth and keep the cloth stationary, the cloth is rapidly cut through cooperation of the pressing base and the cutter, and the whole device is simple in structure, convenient to operate, small in occupied area and high in flexibility.

The invention discloses a quick tensioning mechanism for a woodworking band saw machine and the woodworking band saw machine. The quick tensioning mechanism comprises a tensioning frame, a tensioning assembly, a cam assembly, a guiding element and an upper wheel shaft assembly, and the tensioning frame is fixed to a machine body of the woodworking band saw machine; the tensioning assembly penetrates the tensioning frame and can perform lifting movement relative to the tensioning frame; the cam assembly is connected with the tensioning assembly; when the cam assembly is driven, the tensioning assembly can be lifted and released; the guiding element is connected with the tensioning assembly, so that the guiding element and the tensioning assembly can synchronously move; the guiding element is connected with the tensioning frame at the same time, so that the guiding element and the tensioning frame can perform lifting movement; the upper wheel shaft assembly is connected with the guiding element, so that the upper wheel shaft assembly can swing around the axis of the guiding element; and the upper wheel shaft assembly is connected with an upper saw wheel of the woodworking band saw machine, so that when the upper wheel shaft assembly is driven, the upper saw wheel can be driven to synchronously move. The quick tensioning mechanism has the beneficial effects that the quick tensioning mechanism is applicable to operation of the small band saw machine, the space of the band saw machine is saved, split swinging of the quick tensioning mechanism can be achieved, and the swinging precision is improved.

The invention discloses a rotary cutting beveling machine. The rotary cutting beveling machine includes two automatic feeding copying tool posts, a telescopic transmission device, a telescopic guide track and a pushing rod mechanism, and the telescopic transmission device is installed on the telescopic guide track; the telescopic transmission device includes a sprocket-wheel case and a track trolley chain, the track trolley chain is formed by hinging a plurality of track trolleys end to end, the two automatic feeding copying tool posts are fixed to two of the track trolleys, a cutting tool isinstalled on one of the tool posts, and a beveling tool is installed on the other tool post; and the telescopic guide track includes a guide track body, a locking chain, a spring and a tensioning assembly. The rotary cutting beveling machine can meet the cutting beveling of all pipes of different diameters, completely realize cold cutting, and is extremely wide in use, all parts are connected by aquick tension mechanism, and disassembly and installation are convenient.

According to some embodiments, a winch tightening apparatus comprises a mounting plate; a first moment arm coupled to the mounting plate and configured to provide leverage for rotating the mounting plate; and a pawl comprising a first end and a second end. The first end is pivotally coupled to the mounting plate such that the second end pivots to engage a ratchet gear when the mounting plate is rotated in a first direction and pivots to disengage the ratchet gear when the mounting plate is rotated in a second direction opposite the first direction. Some embodiments include a second moment arm coupled to the mounting plate and configured to provide leverage for rotating the mounting plate. Some embodiments include a counterweight coupled to the mounting plate and positioned to rotate the mounting plate in the second direction

The invention discloses a rope rapid coiling and tensioning device for firefighting crossing rescuing. The rope rapid coiling and tensioning device comprises steel chisels, two steel chisel fixing plates, a winch device, a U-shaped fixed plate, a fixed vertical plate, a rope-coiling device and a tensioning device. The steel chisel fixing plates are fixed at the front end and the rear end of a base plate of the U-shaped fixed plate correspondingly, U-shaped grooves are formed in the two ends of each steel chisel fixing plate, and the upper ends of the steel chisels are clamped in the U-shaped grooves; and the winch device is installed on a vertical plate of the left side of the U-shaped fixed plate, the fixed vertical plate is installed on a vertical plate of the right side of the U-shaped fixed plate, and the rope-coiling device and the tensioning device are both installed on the fixed vertical plate. The rescue rope rapid coiling and tensioning functions can be achieved, a rope does not need to be wound in whole circle, the device can be suitable for rapid coiling and tensioning of a super long rope, and convenience and high efficiency are achieved.

The invention discloses a strap fastening device, which is characterized in that a side plate of the device is provided with end covers, each end cover is provided with a driving wheel, strap winding wheels are arranged between two side plates of the device, one side of strap winding wheel is fixedly connected with the corresponding driving wheel, the driving wheel is a ratchet wheel, the end cover is further internally provided with a pawl which is in tooth engagement with teeth of the ratchet wheel, the bottom of the pawl is provided with two circular grooves which respectively correspond to a clockwise gear and an anticlockwise gear, and a spring installed inside the side plate can pushes a ball into the corresponding circular groove so as to enable the gear of the pawl to be fixed. According to the strap fastening device disclosed by the invention, the driving wheel fixedly connected with the strap winding wheel is a ratchet wheel, the pawl is in tooth engagement with the teeth of the corresponding ratchet wheel, the driving wheel can only drive the strap winding wheel to rotate unidirectionally because of a limiting function of the pawl so as to enable a strap to be fastened or loosened but not rotate in the reverse direction, and an effect of strap locking can be achieved under the condition that the driving wheel does not rotate.

A quick-release device of a bicycle brake cable includes a brake arm mounted on a frame of the bicycle, a guider selectively slidably mounted on a free end of the brake arm and a safe lever pivotally mounted in the brake arm. The brake arm includes a groove defined along an axis thereof. The guider is hollow to allow the brake cable extending therethrough. The safe lever includes a pivot point that divides the safe lever into a press portion and a stop portion extending toward the guider to prevent the guider from an accidental operation due to an improper force.

The invention belongs to the field of shoes, and particularly relates to a device for quick lacing of shoes. The device for quick lacing of shoes includes a shoelace tightening mechanism arranged on a sole; the shoelace tensioning mechanism comprises a rotating wheel connected with a motor; the wheel is connected with a shoelace shaft; and the motor is connected with a battery. The device for quick lacing of shoes provided by the technical scheme of the invention can achieve fast tightening of shoelace; and the shoelaces are fixed around the shoelace shaft to guarantee that the shoelaces do not loose during movement and avoid tripping by loosened shoelaces during walking. The device provided by the invention has the advantages of simple structure, convenient manufacture and low cost.

The invention discloses a pulling force measurement device for a dulcimer string. The device comprises a device shell, a control console, a permanent seat and a driving roller, wherein the top of thedevice shell is provided with a string outlet; the string outlet and the device shell are in integral forming; the control console is arranged in front of the device shell; the control console and thedevice shell are connected through bolts; the permanent seat is arranged below the control console and the device shell; and the device shell and the permanent seat are connected through bolts. The device has the beneficial effects of being reasonable in structure, simple in operation and convenient in use, the string can be subjected to pulling force detection when the dulcimer string is installed, in addition, a detection result is more accurate, the installation quality of the dulcimer string is improved, and the dulcimer string can be quickly strained according to a set value so as to improve the installation efficiency of the dulcimer string.

Safe transport of bulk materials is assured by a lashing system that suspends a flexible end face panel adjacent to rear doors of a shipping container, and that restrains the end face panel during loading and subsequent transport, so that the adjacent container door may be opened and closed without difficulty. The lashing may for instance be done by threading a strap through a ring in a central part of the panel and several cargo rings in the corners of a door opening of the container, and after tightening the strap, the strap is secured by passing a clasp through two holes in the strap that are aligned when under the desired tension. A triangular shaped strap may be sewn into the panel with a ring at the apex as an embodiment.

The invention provides a hockey blocking net convenient to store, disassemble and assemble and provided with a goal. The bet comprises edge covering cloth, a blocking net piece is sewn in an inner cavity of the edge covering cloth, loop hanging ropes are sewn at the tops of the two sides of the edge covering cloth, rope winding iron heads are tied to the surfaces of the loop hanging ropes, and glass fiber rods are inserted into inner cavities of the rope winding iron heads. And a welding pipe head is inserted into one sides, far away from the rope winding iron heads, of the glass fiber rods. Through the cooperation of the first braid, the second braid, the third braid and the fourth braid, a user uses a very light braid structure to form the goal to replace an original cumbersome goal structure, so that the overall weight of the combined product is reduced, and meanwhile, the combined product is more convenient to store, disassemble and assemble; through cooperation of the glass fiberrods, the welding pipe head, the rope winding iron head and the circular bottom pipe, a user only needs to pull the glass fiber rod out of an inner cavity of the welding pipe head and an inner cavityof the rope winding iron head, and then the blocking net can be rapidly disassembled and stored.

A device for producing fiber preforms includes a plurality of unwind stations, a plurality of grippers and at least one first molding tool. Each gripper is movable on a path between a maximum position and a pick-up position. The pick-up position is provided at a thread transfer point and is closer to the unwind station than the maximum position. The first molding tool has a draping position in the region of the connecting lines between the maximum position and the thread transfer points, and a starting position outside the connecting lines. A thread tension control for the threads or rovings is provided.

The invention discloses a string drawing tension device for a racket. The string drawing tension device comprises a base (1), a reinforcing piece (2), a force transfer piece (3) and a connecting piece (4), which are matched with a racket shelf bracket (21), wherein the force transfer piece (3) passes through the base (1), one end of the force transfer piece (3) is connected with the connecting piece (4), and the reinforcing piece (2) is arranged at the other end of the force transfer piece (3). The string drawing tension device has the advantage of simple structure, and is convenient to manufacture and install; and when the string drawing tension device is used, net strings of the racket can be tensioned quickly, so the service life of the net strings is prolonged, and the cost is also saved.

The invention discloses a feeding device for shrinkage setting in textile production. The device comprises a rack and a soaking and setting cylinder; the rack is fixedly connected to the soaking and setting cylinder; the rack comprises two baffles; two fixing rods are symmetrically and fixedly connected between the two baffles; a damping rotating shaft is arranged between the two baffles; and two transmission shafts are rotationally connected between the two baffles. According to the invention, in a cloth conveying process, when cloth between a rotating roller and a driving roller becomes loose due to dip dyeing of a setting agent and the like, the cloth is rapidly tensioned again through the cooperation of a gravity pressing roller, a motor and a feedback adjusting device, so that the setting effect is prevented from being influenced by the change of the tightness and tension of the cloth in the soaking and setting processes.