14results about How to "Improve the tension effect" patented technology

The utility model relates to a crawler belt anti-loosening drag chain wheel support mechanism which comprises a drag chain wheel support and a drag chain wheel body and further comprises a plurality of annular grooves, a plurality of clamping grooves and a plurality of clamping grooves, and the annular grooves are formed in the surface of the drag chain wheel body. The anti-loosening mechanism is installed in the multiple annular grooves, the anti-loosening mechanism comprises multiple annular rubber air bags, and the multiple annular rubber air bags are installed in the multiple annular grooves correspondingly; a connecting pipe penetrates through the front end of the drag chain wheel body, the surface of the end, located in the drag chain wheel body, of the connecting pipe is communicated with a plurality of air inlet pipes, and the ends, away from the connecting pipe, of the air inlet pipes penetrate through the drag chain wheel body to be communicated with an annular rubber air bag. The interior of the connecting pipe and the interior of the air inlet pipe are inflated, so that the multiple annular rubber air bags on the surface of the drag chain wheel body are expanded, a crawler belt is rapidly tensioned, in addition, due to the fact that the annular rubber air bags are expanded annularly, different positions of the crawler belt can be tensioned, and the tensioning effect is improved.

The utility model relates to the field of passenger conveying, in particular to an escalator handrail belt driving assembly which comprises a handrail wheel, a sliding mechanism and a tensioning assembly. The sliding mechanism comprises a supporting frame, a plurality of transverse shafts connected to the supporting frame, sliding pieces controllably sliding on the transverse shafts in the first direction and positioning pieces controllably sliding on the sliding pieces in the second direction. The handrail wheel is provided with a linkage part and a friction part which coaxially and synchronously rotate, and the handrail belt moves along with rotation of the friction part. The tensioning assembly comprises a transition wheel, a first chain and a second chain. The transition wheel is a double-row chain wheel and is rotationally connected to the positioning piece, and the first chain and the second chain are both carried on the transition wheel and bypass the linkage parts of the driving wheel and the handrail wheel correspondingly. And the driving wheel controllably rotates to drive the handrail wheel to synchronously rotate, so that the handrail belt is driven to move. The position of the transition wheel is adjusted through the sliding mechanism, so that the first chain and the second chain are kept tensioned. The whole structure is simple and stable, and high practicability is achieved.

The utility model discloses a multifunctional thermal sealing device for an air model game facility, which relates to the technical field of air model processing and comprises a base frame, a tensioning mechanism is fixedly mounted on one side of the top of the base frame, and a concave frame is fixedly mounted in the middle of the top of the base frame. By the adoption of the structure, the first air cylinder is started to push the fixing base to move up and down so that the pressing roller can move downwards, the pressing roller moves downwards to abut against the gas mold, the gas mold can be in a tightened state, the gas mold is arranged between the guide roller and the pressing roller, and elastic force is provided through the telescopic spring so that tensioning force can be formed between the gas mold and the pressing roller; the elastic force of the telescopic spring acts on the gas mold, so that the whole gas mold can be in a tightened state, the condition that the gas mold is wrinkled in the heat sealing period can be avoided, the heat sealing processing quality of the gas mold can be improved, the heat sealing temperature and pressure can be uniform in the gas mold processing period, and the temperature of a heat sealing area is relatively uniform; and the uniformity and the quality of heat sealing processing of the device can be improved.

The utility model discloses a cotton thread plying transformation machine which comprises a machine frame, a plurality of tensioning mechanisms and a plurality of detection mechanisms. The rack comprises a bottom frame, the top of the bottom frame is fixedly connected with a front frame and a rear frame, and the side, away from the rear frame, of the front frame is fixedly connected with a side frame; each tensioning mechanism comprises a clamping seat, a connecting frame, a wire guide wheel, a lower tensioning wheel and an upper tensioning wheel, and the clamping seats are fixedly connected to the top of the rear frame and are arranged at intervals in the length direction of the rear frame; each detection mechanism comprises an optical fiber sensor and an optical fiber amplifier, and the optical fiber sensors and the optical fiber amplifiers are fixedly installed on the front frame and arranged at intervals in the length direction of the front frame. According to the utility model, the tensioning mechanism is used for tensioning the cotton threads, the tensioning effect is good so as to facilitate the subsequent use, the detection mechanism is used for monitoring the state of the cotton threads, the broken threads can be found in time, and the situation that the quality of plying of the cotton threads is influenced by the breakage of any one or more cotton threads is avoided.

The utility model discloses a kind of lifting mechanisms, belong to lifting mechanism technical field.This kind of lifting mechanism, including main body and auxiliary mechanism, main body includes base, the upper end of base is fixedly installed with fixed frame, the inside both sides of fixed frame are fixedly installed with a pair of slide rails, two pairs of slide rails are fixedly installed with lifting frame between, the inside one side of lifting frame is rotatably connected with first rotating shaft, and the center of first rotating shaft is sleeved with first synchronous wheel;Auxiliary mechanism includes lifting frame, the bottom end both sides of lifting frame are respectively connected with the upper end both sides of lifting frame, the inside both sides of lifting frame are fixedly installed with slide rod, mobile frame is slidably installed between a pair of slide rods, the top of lifting frame is fixedly installed with top plate, the bottom side of top plate is rotatably connected with second rotating shaft, the center of second rotating shaft is sleeved with second synchronous wheel, and first synchronous belt is wound between second synchronous wheel and first synchronous wheel, the utility model can effectively improve the practicality of lifting mechanism, with higher practical value.

The present invention discloses a composite film bag and its production equipment, including a base layer, a heat insulation structure is arranged at the bottom of the base layer, a waterproof structure is arranged at the top of the base layer, a protective structure is arranged at the top of the waterproof structure, the base layer is composed of a PET layer and a plastic layer, the waterproof structure includes a hydrophobic film and a nano film, the heat insulation structure is composed of a reflective film and an infrared film, and the protective structure is composed of a polyester film and a wear-resistant coating. The present invention can improve the structural strength and structural functionality of the base layer by firstly arranging a heat insulation structure, a waterproof structure and a protective structure on the surface of the base layer, improve the scope of application of the composite film bag, and meet the use requirements of different environments. The present invention can improve the structural functionality of the existing composite film bag, replace the method of connecting the structure through a plurality of adhesive layers, prevent the structure from separating when subjected to a high temperature environment, and avoid affecting the wrapping protection effect of the composite film bag.

The invention relates to the technical field of material tensioning, in particular to tensioning equipment suitable for production of a prestressed material of a rail sleeper. Comprising a bottom frame, the bottom frame is slidably connected with a movable frame, and the movable frame is provided with a first hydraulic push rod; the connecting piece is rotationally connected to the telescopic end of the first hydraulic push rod, the connecting piece is provided with a shell, the shell is filled with a transmission medium, the shell is slidably connected with a sliding rod, and a first pipe and a second pipe are communicated between the shell arranged in a mirror image mode; the die set is arranged on the bottom frame and used for forming materials; and the limiting mechanism is arranged on the sliding rod and is used for applying prestress to the mold group. According to the device, the shells which are arranged in a mirror image mode are communicated through the first pipe and the second pipe, so that the force applied to the sliding rod by a transmission medium in the shells is uniform, uniform prestress is applied to the mold set through the limiting mechanism, and the preload applied to the sleeper is uniform.

The utility model discloses an aluminum alloy welding wire feeding device with a dynamic tension balancing function, which comprises a moving platform, a discharging device and a wire feeding guiding assembly are arranged on the moving platform, and an adjustable tensioning assembly is arranged between the discharging device and the wire feeding guiding assembly. The guide wire feeding assembly comprises a mounting base, and a fixed wire leading wheel is arranged on the mounting base; a sliding piece is further arranged on the mounting base, and a movable lead wheel is arranged on the sliding piece; the adjustable tensioning assembly comprises a main body support, and the main body support is provided with a plurality of guiding pieces annularly distributed with the main body support. A rotating handle rotationally connected with the main body bracket is arranged in the main body bracket; a connecting rod is arranged between the rotating handle and the guide piece; and when the rotating handle is rotated, each guide piece can synchronously stretch and retract relative to the main body bracket. The feeding device is arranged on the movable platform for feeding, wires are guided and straightened through the wire guiding and feeding assembly, tensioning is synchronously conducted through the multiple guiding pieces on the adjustable tensioning assembly, and the tensioning effect is good and reliable.

This invention provides a pulley tensioning device and a stacker crane. The device includes a fixed bracket, a sliding seat slidably mounted thereon, and an adjusting assembly. The sliding seat has an axle with a tensioning pulley, and the outer circumference of the tensioning pulley has a pulley groove for accommodating the wire rope. The adjusting assembly can push the sliding seat to move, thereby causing the tensioning pulley to press the wire rope, achieving tension and preventing slippage. This device has a simple structure, is easy to install and adjust, and can effectively suppress wire rope swaying and collision, making it particularly suitable for wire rope tensioning in high-rise stacker cranes.

The utility model relates to axial flux motor manufacturing equipment technical field especially relates to tensioner, this tensioner includes guide component, winding roller, brake, outgoing line subassembly and elastic tensioning subassembly, is provided with a plurality of threading path in guide component, each threading path is used to accommodate a wire rod, at least two winding rollers are sequentially arranged along the axis, each winding roller is provided with a plurality of annular winding grooves extending along the axis, the end of each threading path is correspondingly provided with an annular winding groove, each brake is connected with a winding roller, the brake is configured to increase the resistance of winding roller rotation along the axis, each outgoing line subassembly can transmit the wire rod of winding over winding roller in the preset quantity and transmit the wire rod to the winding nozzle, each elastic tensioning subassembly is correspondingly provided with a group of outgoing line subassembly, and the elastic tensioning subassembly can drive the outgoing line subassembly elastic tensioning wire rod.

This utility model belongs to the field of textile equipment and proposes a tension control device for cotton yarn twisting. It includes a machine body, a spindle frame, a ring, a vertical roller, a tensioning device, a guide, a twisting roller, and a yarn roller. A winding motor and a twisting motor are respectively installed at the shaft ends of the yarn roller and the twisting roller. The tensioning device includes a mounting base with two centrally symmetrically distributed tensioning arms. A tensioning wheel is located at the end of each tensioning arm facing the center of the mounting base, and a tensioning shaft is located at the end of each tensioning arm near the edge of the mounting base. A driven gear is located at the shaft end of the tensioning shaft inside the mounting base. A driving gear ring is located on the transmission side of the driven gear, and a transmission device is located at the center of the driving gear ring. A tension adjusting motor is located at the power input end of the transmission device, and the tension adjusting motor is located inside the machine body. This utility model has a reasonable design, acts on the cotton yarn through multiple points / lines, has good adjustment performance, and is highly practical and suitable for large-scale promotion.

The utility model discloses a film metamaterial base material laminating device which comprises an unwinding mechanism for unwinding a metamaterial film and a laminating film, and further comprises a pushing mechanism for pushing a film material, the pushing mechanism comprises a pair of pushing rollers which are matched with each other, and the pushing rollers are driven by a driving structure; the anti-dislocation pressing rod structure is matched with the pushing roller; the anti-dislocation pressing rod structure comprises a plurality of anti-dislocation pressing rods penetrating through the pushing rollers, groove body structures matched with the anti-dislocation pressing rods are formed in the pushing rollers, and the anti-dislocation pressing rods penetrate through the groove body structures; the film is pressed down and attached through an anti-dislocation pressing rod; the height of the anti-dislocation pressing rod is adjusted through an adjusting support structure. By means of the structure, in the metamaterial film laminating process, stability and accuracy of film laminating are kept, and the technical defect that two films with different material attributes are prone to deviation and disengagement in the film laminating process is effectively overcome.

The utility model relates to the technical field of food packaging bag processing, and discloses a dividing and cutting machine for food packaging bag processing, which comprises a working frame, a first roll shaft is arranged at a position close to the top end in the working frame, and a tension roller is arranged between the mounting frames. The first fluted disc and the second fluted disc are assembled, the first fluted disc can be driven to rotate after the driving motor is started to work, the first fluted disc and the second fluted disc are matched with each other to form meshing transmission, and one side of the second fluted disc is rotatably connected with the working frame. The other side of the second fluted disc is connected and mounted with one mounting frame, so that when the first fluted disc drives the second fluted disc to rotate in a driven manner, the mounting frame rotates correspondingly, and when the other mounting frame is connected with the working frame, the other mounting frame is also rotatably connected with the working frame, and when the angle of the mounting frame is adjusted, a tensioning roller can be matched to complete tensioning adjustment; therefore, the overall tensioning effect is well improved in the working process.

The utility model discloses a variable-speed controllable grain discharging wheel structure which comprises a grain discharging section, a grain discharging space is arranged in the grain discharging section, at least one set of grain discharging device is arranged at an inlet of the grain discharging space, the grain discharging device comprises four grain discharging wheels arranged in parallel, the grain discharging wheels are connected with first chain wheels through rotating shafts, and the first chain wheels are connected with second chain wheels through rotating shafts. Four second chain wheels are arranged below the four first chain wheels, a third chain wheel is parallel to the first chain wheels, the chain is connected with the four first chain wheels, the four second chain wheels and the third chain wheel to form a chain wheel set, the third chain wheel is a driving wheel, and the driving wheel is connected with a variable frequency motor through a rotating shaft. According to the structure, the four grain discharging wheels form a cooperative working unit. Through precise control of the variable-speed motor, the four grain discharging wheels can achieve highly synchronous variable-speed operation. In addition, the structure adopts high-quality combination of the chain wheel and the chain, so that the stability and the efficiency of power transmission are ensured.