Device for testing bearing capacity of aluminum alloy bicycle rim

Abstract

The invention provides an aluminum alloy bicycle rim bearing capacity testing device, and relates to the field of bicycle rim bearing capacity testing, and the device comprises a test bench, the rear side of the upper end surface of the test bench is provided with a support frame; a lifting mechanism is arranged on the supporting frame, and a bearing capacity testing mechanism is installed on the front side of the lifting mechanism. A vertical rotating shaft is rotationally connected to the test table, a rotating table is fixedly connected to the upper end of the vertical rotating shaft, four clamping assemblies are installed on the upper end face of the rotating table in an annular array shape, and each clamping assembly is provided with an anti-loosening assembly. Through the arrangement of the anti-loosening assembly, the threaded rod can be prevented from loosening, the test stability is improved, and the accuracy of a test result is ensured; the problems that in the testing process of an existing bearing capacity testing device, a threaded rod is prone to loosening due to stress, the stability of an aluminum alloy bicycle rim is lowered in the testing process, and the accuracy of a testing result is affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle wheel rim load-bearing capacity testing, in particular to a device for testing the load-bearing capacity of an aluminum alloy bicycle wheel rim. Background Art

[0002] As a widely used means of transportation and sports equipment, the performance and safety of bicycles are of vital importance to riders. As one of the key components of bicycles, bicycle rims not only directly affect the riding comfort and handling, but also bear the important tasks of supporting the weight of the entire vehicle and coping with various complex road conditions and impact forces during driving. In recent years, with the rapid development of new material technology, aluminum alloy materials have been widely used in the field of bicycle rim manufacturing due to their advantages such as light weight, high strength and corrosion resistance.

[0003] At present, in order to ensure the factory quality of aluminum alloy bicycle rims, it is necessary to test the bearing capacity of aluminum alloy bicycle rims through a bearing capacity testing device. However, the common bearing capacity testing devices on the market still have some shortcomings in practical applications. First, when positioning the aluminum alloy bicycle rims, these devices usually use threaded rod clamping assemblies for fixing, and the threaded rods are easily loosened under force during the test, resulting in a decrease in the stability of the aluminum alloy bicycle rims during the test, affecting the accuracy of the test results; secondly, when the current bearing capacity testing device is in operation, it usually relies on two screws to drive the sliding plate up and down. During long-term use, the screws often cannot be lubricated in a timely and effective manner, which not only increases friction loss, but also may affect the operating accuracy and life of the bearing capacity testing device. Summary of the invention

[0004] The disclosed embodiment relates to an aluminum alloy bicycle rim load-bearing capacity testing device, which prevents the threaded rod from loosening during the test by means of an anti-loosening component, significantly improves the stability of the aluminum alloy bicycle rim during the test, and further ensures the accuracy and reliability of the test result; through the lubricating component, the piston rod and the piston can be moved back and forth during the up and down movement of the sliding plate, thereby absorbing and transporting the lubricating oil inside the oil storage tank to the inside of the lubrication pipe, and finally spraying the lubricating oil onto two screw rods for lubrication, thereby enabling the two screw rods to be lubricated in a timely and effective manner, which not only reduces friction loss but also improves the operating accuracy and life of the load-bearing capacity testing device.

[0005] In a first aspect of the present disclosure, a device for testing the bearing capacity of an aluminum alloy bicycle rim is provided, which specifically comprises: a test bench, a support frame is installed on the rear side of the upper end surface of the test bench; a lifting mechanism is arranged on the support frame, and a bearing capacity testing mechanism is installed on the front side of the lifting mechanism; a vertical rotating shaft is rotatably connected to the test bench, a rotating table is fixedly connected to the upper end of the vertical rotating shaft, four clamping assemblies are installed in a circular array on the upper end surface of the rotating table, each clamping assembly clamps an aluminum alloy bicycle rim, and each clamping assembly is provided with an anti-loosening assembly; The lifting mechanism is provided with a lubrication component; the clamping assembly includes a base, an L-shaped support block, a threaded rod and a brake gear, the base is installed on the upper end surface of the rotating table, the upper part of the base is fixedly connected to the L-shaped support block, the L-shaped support block is rotatably connected to the threaded rod, and the upper side of the threaded rod is fixedly connected to the brake gear; the anti-loosening assembly includes a box body, a sliding block, a trapezoidal push block and a brake tooth block, the box body is installed on the top of the L-shaped support block, the sliding block is slidably connected inside the box body, the head end of the sliding block is fixedly connected to the brake tooth block, and the upper part of the sliding block is fixedly connected to the trapezoidal push block.

[0006] In at least some embodiments, a controller is installed on the front left side of the test bench through a bracket, four vertical guide rods are arranged inside the support frame, and two fixed racks are fixedly connected to the rear side of the support frame in a left-right symmetrical manner; six universal ball bearings are installed in a circular array on the upper end surface of the test bench below the turntable, and the universal balls on the six universal ball bearings are all rollingly connected to the bottom end surface of the turntable.

[0007] In at least some embodiments, a groove wheel is installed at the lower end of the vertical rotating shaft, the driving motor is installed at the bottom of the test bench, and a driving disc is fixedly connected to the rotating shaft of the driving motor, a notched disc is fixedly connected to the middle of the upper end surface of the driving disc, and a toggle column is provided at the edge of the upper end surface of the driving disc, and when the driving disc rotates with the toggle column, the toggle column can be slidably connected with the strip groove opened on the groove wheel.

[0008] In at least some embodiments, an oil storage tank is installed on the bottom end surface of the support frame, and an oil tank cover is installed on the top of the oil storage tank. The top of the oil tank cover is symmetrically provided with two oil return ports, and each oil return port is fixedly connected to a first folding tube at the upper end. A U-shaped baffle is provided inside the oil storage tank, and a transparent window is fixedly inlaid on the rear end surface of the oil storage tank.

[0009] In at least some embodiments, the lifting mechanism includes a sliding plate, a lead screw, a nut, a synchronous shaft, and a driving motor. The sliding plate is slidably connected to four vertical guide rods, and a nut is fixedly connected to each of the left and right sides of the bottom end surface of the sliding plate. The lower end of the nut is fixedly connected to the upper end of the first folding pipe. A lead screw passing through the sliding plate is threadedly connected inside each nut. The upper ends of the two lead screws are rotatably connected to the upper part of the support frame, the lower ends of the two lead screws are rotatably connected inside the fuel tank, and the lower ends of the two lead screws penetrate through the fuel tank cover plate. The synchronous shaft is rotatably connected to the top end surface of the support frame, and a first bevel gear is installed at each of the left and right ends of the synchronous shaft. A driven pulley is installed outside the synchronous shaft. The driving motor is installed on the top of the support frame, and a driving pulley is installed on the rotating shaft of the driving motor. The driving pulley is connected to the driven pulley through a belt. A second bevel gear is installed at the upper end of each lead screw, and the two second bevel gears are respectively engaged with the two first bevel gears. The two lead screws are distributed symmetrically left and right.

[0010] In at least some embodiments, the bearing capacity testing mechanism includes a force sensor, a connecting plate, a pressing frame, a guide rod, and a U-shaped bayonet. The upper end of the force sensor is installed on the front bottom end surface of the sliding plate, and a connecting plate is installed at the lower end of the force sensor. A guide rod passing through the sliding plate is fixedly connected to each of the four corners of the upper end surface of the connecting plate, and a pressing frame is fixedly connected to the lower end surface of the connecting plate. A U-shaped bayonet is formed at the lower end of the pressing frame.

[0011] In at least some embodiments, the clamping assembly further includes a clamping plate, a cushion block, a threaded cylinder, and a hexagonal rotating block. Two T-shaped sliders are provided on the clamping plate, and the clamping plate is slidably connected to the L-shaped support block through the T-shaped sliders. A threaded cylinder is fixedly connected to the upper end surface of the clamping plate, and the threaded cylinder is threadedly connected to the threaded rod. The cushion block is fixedly connected to the upper end surface of the base. The hexagonal rotating block is fixedly connected to the upper end of the threaded rod, and a sleeve is sleeved outside the hexagonal rotating block. An aluminum alloy bicycle wheel rim is clamped between the clamping plate and the cushion block.

[0012] In at least some embodiments, the lubricating component includes a fixed plate, a negative pressure cylinder, a piston rod, a driving rod, a driving block, a driving shaft, a driving circular plate, a driving gear, a driving column, an oil delivery hose, a lubricating pipe, a first one-way valve, a second one-way valve, a second folding pipe, and a sliding rod. The fixed plate is fixedly connected to the upper end surface of the sliding plate. A negative pressure cylinder is fixedly connected to the fixed plate. A piston is fixedly connected to the piston rod, and the piston is in close contact with the inner peripheral surface of the negative pressure cylinder. The outer end of the piston rod is fixedly connected to the driving rod, and the driving block is fixedly connected to the driving rod. A strip-shaped chute is formed in the driving block. The driving shaft is rotatably connected to the upper end surface of the sliding plate, and a driving circular plate and a driving gear are fixedly connected to the front and rear ends of the driving shaft respectively. The driving gear meshes with the fixed rack. A driving column is arranged at the edge of the front end surface of the driving circular plate, and the front end of the driving column is slidably connected to the strip-shaped chute formed in the driving block. One oil inlet and one oil outlet are arranged on the negative pressure cylinder. A first one-way valve is installed on the oil inlet of the negative pressure cylinder, and a second one-way valve is installed on the oil outlet of the negative pressure cylinder. An oil delivery hose is connected to the oil inlet of the negative pressure cylinder, and the other end of the oil delivery hose is connected to the oil outlet at the lower rear side of the storage tank. A lubricating pipe is connected to the oil outlet of the negative pressure cylinder through a pipeline. The lubricating pipe is sleeved outside the lead screw. The upper end of the lubricating pipe is fixedly connected to the second folding pipe, and the upper end of the second folding pipe is fixedly connected to the inner top surface of the support frame. A sliding rod is fixedly connected to the driving rod, and the sliding rod is slidably connected to the fixed plate.

[0013] In at least some embodiments, a spring is arranged inside the box body at the tail end of the sliding block. Two strip-shaped grooves are formed inside the box body. Two strip-shaped sliding blocks are arranged on the sliding block, and the two strip-shaped sliding blocks are respectively slidably connected to the two strip-shaped grooves.

[0014] In at least some embodiments, when the sleeve is sleeved outside the hexagonal rotating block, the sleeve pushes the trapezoidal pushing block towards the tail end direction of the box body, and at this time, the braking tooth block is separated from the braking gear. When the sleeve is removed from outside the hexagonal rotating block, the sliding block drives the braking tooth block to move towards the direction close to the braking gear, and at this time, the braking tooth block meshes with the braking gear.

[0015] The present invention provides a test device for the load-bearing capacity of an aluminum alloy bicycle rim, which has the following beneficial effects: First, through the provided anti-loosening component, after the aluminum alloy bicycle rim is clamped and fixed, when the sleeve is removed from outside the hexagonal rotating block, the sliding block drives the braking tooth block to move towards the direction close to the braking gear under the action of the spring force, and at this time, the braking tooth block meshes with the braking gear, thereby enabling an effective locking effect on the threaded rod, avoiding the loosening of the threaded rod during the test, significantly improving the stability of the aluminum alloy bicycle rim during the test, and further ensuring the accuracy and reliability of the test results.

[0016] Second, through the provided lubrication component, the piston rod and the piston can be moved back and forth during the up and down movement of the sliding plate, thereby absorbing the lubricating oil inside the oil storage tank and transporting it to the inside of the lubrication pipe, and finally spraying the lubricating oil onto the two screw rods for lubrication. The lubricating oil after lubrication flows downward back into the oil storage tank, thereby realizing the circulation lubrication of the two screw rods from top to bottom, so that the two screw rods can be lubricated in a timely and effective manner, which not only reduces the friction loss, but also improves the operating accuracy and life of the load-bearing capacity testing device, and also reduces the frequency of later manual maintenance, thereby improving the overall efficiency and reliability of the load-bearing capacity testing device, and providing a more stable and accurate testing environment for the load-bearing capacity testing of aluminum alloy bicycle rims.

[0017] 3. By setting the trapezoidal push block, after the sleeve is put onto the outside of the hexagonal rotating block, the sleeve will push the trapezoidal push block toward the rear end of the box body. At this time, the brake tooth block will be separated from the brake gear. Therefore, when the hexagonal rotating block and the threaded rod need to be rotated, there is no need to separate the brake tooth block from the brake gear by the other hand, thereby eliminating the operation steps and improving the convenience of using the load-bearing capacity testing device.

[0018] Fourth, through the arrangement of the grooved wheel, the driving motor, the driving disc, the toggle column, the notched disc, the vertical rotating shaft and the rotating table, the positions of the four clamping assemblies and the four aluminum alloy bicycle rims can be switched by rotating counterclockwise, so that during the aluminum alloy bicycle rim testing process, the tested aluminum alloy bicycle rims can be removed and replaced in advance, so that the overall work efficiency is greatly optimized, which is beneficial to the testing of large quantities of aluminum alloy bicycle rims. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0020] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] In the attached picture: Figure 1 A structural diagram showing the overall structure of the present application; Figure 2 A schematic diagram showing the structure of the present application from a rear perspective is shown; Figure 3 The schematic diagram of the structure after splitting of the present application is shown; Figure 4 This application shows Figure 1 A schematic diagram of the structure with a partial enlargement at the center; Figure 5 The schematic diagram of the structure of the oil storage tank and the oil tank cover after being disassembled is shown; Figure 6 A schematic diagram of the structure of the test bench, the rotating table and the universal ball bearing of the present application is shown; Figure 7 The schematic diagram of the structure of the groove wheel, the driving disc, the toggle post and the notched disc of the present application is shown; Figure 8 A schematic diagram showing the structure of the oil storage tank and the lifting mechanism of the present application is shown; Figure 9 A structural schematic diagram of a load-bearing capacity testing mechanism of the present application is shown; Figure 10 A schematic structural diagram of the clamping assembly, the wrench sleeve and the anti-loosening assembly of the present application is shown; Figure 11 A schematic diagram of the structure of the clamping assembly and the sleeve after being disassembled is shown; Figure 12 A schematic diagram of the structure after the box body and the sliding block of the present application are separated is shown; Figure 13 A schematic diagram of the structure of the lubrication component of the present application is shown; Figure 14 A schematic structural diagram of a partial cross-section of the negative pressure cylinder of the present application is shown.

[0022] Reference numerals list 1. Test bench; 101. Support frame; 102. Controller; 103. Vertical guide rod; 104. Vertical rotating shaft; 105. Rotating table; 106. Grooved wheel; 107. Driving motor; 108. Fixed rack; 109. Oil storage tank; 1010. Oil tank cover; 1011. Oil return port; 1012. First folding tube; 1013. 匚-shaped baffle; 1014. Transparent window; 1015. Universal ball bearing; 1016. Driving disc; 1017. Toggle column; 1018. Notched disc; 2. Lifting mechanism; 201. Sliding plate; 202. Screw rod; 203. Nut; 204. Synchronous shaft; 205. Driving motor; 3. Load-bearing capacity testing mechanism; 301. Force sensor; 302. Connecting plate; 303. Lower pressure frame; 304. Guide rod; 305. U-shaped bayonet; 4. Clamping assembly; 401. Base; 402. L-shaped support block; 403. Clamping plate; 404. Cushion block; 405. Threaded cylinder; 406. Threaded rod; 407. Braking gear; 408. Hexagonal rotating block; 5. Lubricating components; 501. Fixed plate; 502. Negative pressure cylinder; 503. Piston rod; 504. Driving rod; 505. Driving block; 506. Driving shaft; 507. Driving circular plate; 508. Driving gear; 509. Driving column; 5010. Oil delivery hose; 5011. Lubricating pipe; 5012. First one-way valve; 5013. Second one-way valve; 5014. Second folding pipe; 5015. Sliding rod; 6. Sleeve; 7. Anti-loosening component; 701. Box body; 702. Sliding block; 703. Trapezoidal push block; 704. Braking tooth block. Detailed implementation manners

[0023] For the purposes, technical solutions and advantages of the embodiments of the present invention to be more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0024] Embodiment 1: Please refer to Figures 1 to 14 : The present invention provides a test device for the load-bearing capacity of an aluminum alloy bicycle rim, comprising: a test bench 1, on the rear side of the upper end surface of the test bench 1, a support frame 101 is installed; a lifting mechanism 2 is arranged on the support frame 101, and a load-bearing capacity test mechanism 3 is installed on the front side of the lifting mechanism 2; a vertical rotating shaft 104 is rotatably connected to the test bench 1, the upper end of the vertical rotating shaft 104 is fixedly connected with a rotating table 105, and four clamping components 4 are annularly and arrayedly installed on the upper end surface of the rotating table 105. Each clamping component 4 clamps an aluminum alloy bicycle rim, and an anti-loosening component 7 is arranged on each clamping component 4; a lubricating component 5 is arranged on the lifting mechanism 2; the clamping component 4 includes a base 401, an L-shaped support block 402, a threaded rod 406 and a braking gear 407. The base 401 is installed on the upper end surface of the rotating table 105, the upper part of the base 401 is fixedly connected with the L-shaped support block 402, the threaded rod 406 is rotatably connected to the L-shaped support block 402, and the braking gear 407 is fixedly connected to the outer side of the upper part of the threaded rod 406; the anti-loosening component 7 includes a box body 701, a sliding block 702, a trapezoidal push block 703 and a braking tooth block 704. The box body 701 is installed on the top of the L-shaped support block 402, the sliding block 702 is slidably connected to the inside of the box body 701, the head end of the sliding block 702 is fixedly connected with the braking tooth block 704, and the upper part of the sliding block 702 is fixedly connected with the trapezoidal push block 703. By arranging the trapezoidal push block 703, after the sleeve 6 is sleeved outside the hexagonal rotating block 408, the sleeve 6 will push the trapezoidal push block 703 towards the tail end direction of the box body 701. At this time, the braking tooth block 704 will be separated from the braking gear 407, so that when it is necessary to rotate the hexagonal rotating block 408 and the threaded rod 406, there is no need to separately operate the braking tooth block 704 and the braking gear 407 with another hand, thus saving the operation steps.

[0025] A controller 102 is installed on the front left side of the test bench 1 through a bracket. Four vertical guide rods 103 are arranged inside the support frame 101. Two fixed racks 108 are fixedly connected to the rear side of the support frame 101 in a left-right symmetric manner; six universal ball bearings 1015 are annularly and arrayedly installed on the upper end surface of the test bench 1 below the rotating table 105, and the universal balls on the six universal ball bearings 1015 are all in rolling connection with the bottom end surface of the rotating table 105, making the operation of this load-bearing capacity test device more stable.

[0026] A grooved wheel 106 is installed at the lower end of the vertical rotating shaft 104. A driving motor 107 is installed at the bottom of the test bench 1, and a driving disc 1016 is fixedly connected to the rotating shaft of the driving motor 107. A notched disc 1018 is fixedly connected to the middle of the upper end surface of the driving disc 1016, and a toggle post 1017 is arranged at the edge of the upper end surface of the driving disc 1016. When the driving disc 1016 rotates with the toggle post 1017, the toggle post 1017 can be slidably connected to the strip-shaped groove opened on the grooved wheel 106.

[0027] The inner bottom end face of the support frame 101 is provided with an oil storage tank 109. The top of the oil storage tank 109 is provided with an oil tank cover plate 1010. The oil storage tank 109 is used to store lubricating oil. The top of the oil tank cover plate 1010 is symmetrically provided with two oil return ports 1011 on the left and right. Each upper end of the oil return port 1011 is fixedly connected with a first folding pipe 1012. An inverted U-shaped baffle 1013 is arranged inside the oil storage tank 109 to reduce the internal space of the oil storage tank 109, thereby saving the usage amount of lubricating oil. The rear end face of the oil storage tank 109 is fixedly inlaid with a transparent window 1014 for observing the amount of lubricating oil inside the oil storage tank 109.

[0028] The lifting mechanism 2 includes a sliding plate 201, a lead screw 202, a nut 203, a synchronous shaft 204 and a driving motor 205. The sliding plate 201 is slidably connected to four vertical guide rods 103. And both left and right sides of the bottom end face of the sliding plate 201 are fixedly connected with a nut 203. The lower end of the nut 203 is fixedly connected with the upper end of the first folding pipe 1012. Each nut 203 is internally threadedly connected with a lead screw 202 passing through the sliding plate 201. The upper ends of the two lead screws 202 are rotatably connected to the upper part of the support frame 101. The lower ends of the two lead screws 202 are rotatably connected inside the oil storage tank 109. And the lower ends of the two lead screws 202 penetrate through the oil tank cover plate 1010. The synchronous shaft 204 is rotatably connected to the top end face of the support frame 101. And a first bevel gear is installed at both the left and right ends of the synchronous shaft 204. A driven pulley is installed outside the synchronous shaft 204. The driving motor 205 is installed on the top of the support frame 101. And a driving pulley is installed on the rotating shaft of the driving motor 205. The driving pulley is in transmission connection with the driven pulley through a belt. A second bevel gear is installed at the upper end of each lead screw 202. And the two second bevel gears are respectively meshed with the two first bevel gears. The two lead screws 202 are symmetrically distributed on the left and right. Through the setting of the lifting mechanism 2, it is used to drive the load-bearing capacity testing mechanism 3 to move up and down.

[0029] The load-bearing capacity testing mechanism 3 includes a force sensor 301, a connecting plate 302, a pressing frame 303, a guide rod 304 and a U-shaped bayonet 305. The upper end of the force sensor 301 is installed on the front bottom end face of the sliding plate 201. And the lower end of the force sensor 301 is installed with a connecting plate 302. A guide rod 304 passing through the sliding plate 201 is fixedly connected to each of the four corners of the upper end face of the connecting plate 302. And a pressing frame 303 is fixedly connected to the lower end face of the connecting plate 302. A U-shaped bayonet 305 is opened at the lower end of the pressing frame 303. The force sensor 301, the driving motor 205 and the driving motor 107 are all electrically connected to the controller 102. Through the setting of the load-bearing capacity testing mechanism 3, it is used to test the load-bearing capacity of the aluminum alloy bicycle rim.

[0030] The clamping assembly 4 further includes a clamping plate 403, a cushion block 404, a threaded barrel 405 and a hexagonal rotating block 408. Two T-shaped sliders are arranged on the clamping plate 403, and the clamping plate 403 is slidably connected to the L-shaped support block 402 through the T-shaped sliders. A threaded barrel 405 is fixedly connected to the upper end surface of the clamping plate 403. The threaded barrel 405 is threadedly connected to the threaded rod 406. The cushion block 404 is fixedly connected to the upper end surface of the base 401. The hexagonal rotating block 408 is fixedly connected to the upper end of the threaded rod 406, and a sleeve 6 is sleeved outside the hexagonal rotating block 408. A hexagonal groove is formed in the bottom end surface of the sleeve 6, and a square groove is formed in the upper end surface of the sleeve 6. An aluminum alloy bicycle rim is clamped between the clamping plate 403 and the cushion block 404.

[0031] A spring is arranged inside the box body 701 at the tail end of the sliding block 702. Two strip-shaped grooves are formed inside the box body 701. Two strip-shaped sliders are arranged on the sliding block 702, and the two strip-shaped sliders are respectively slidably connected to the two strip-shaped grooves to provide a guiding function for the sliding block 702.

[0032] When the sleeve 6 is sleeved outside the hexagonal rotating block 408, the sleeve 6 pushes the trapezoidal push block 703 towards the tail end direction of the box body 701, and at this time the braking tooth block 704 is separated from the braking gear 407, and at this time it is convenient to rotate the threaded rod 406; when the sleeve 6 is removed from outside the hexagonal rotating block 408, the sliding block 702 drives the braking tooth block 704 to move towards the direction close to the braking gear 407, and at this time the braking tooth block 704 is engaged with the braking gear 407, and at this time the threaded rod 406 can be locked and limited.

[0033] Embodiment 2, on the basis of Embodiment 1, as Figure 2 and Figure 13As shown in the figure, the lubrication component 5 includes a fixing plate 501, a negative pressure cylinder 502, a piston rod 503, a driving rod 504, a driving block 505, a driving shaft 506, a driving circular plate 507, a driving gear 508, a driving column 509, an oil delivery hose 5010, a lubrication pipe 5011, a first one-way valve 5012, a second one-way valve 5013, a second folding pipe 5014 and a sliding rod 5015. The fixing plate 501 is fixedly connected to the upper end surface of the sliding plate 201. The negative pressure cylinder 502 is fixedly connected to the fixing plate 501. A piston is fixedly connected to the piston rod 503, and the piston is in close contact with the inner peripheral surface of the negative pressure cylinder 502. The outer end of the piston rod 503 is fixedly connected to the driving rod 504. The driving block 505 is fixedly connected to the driving rod 504, and a strip-shaped sliding groove is formed in the driving block 505. The driving shaft 506 is rotatably connected to the upper end surface of the sliding plate 201, and the driving circular plate 507 and the driving gear 508 are fixedly connected to the front and rear ends of the driving shaft 506. The driving gear 508 meshes with the fixed rack 108. The driving column 509 is arranged at the edge of the front end surface of the driving circular plate 507, and the front end of the driving column 509 is slidably connected to the strip-shaped sliding groove formed in the driving block 505. One oil inlet and one oil outlet are arranged on the negative pressure cylinder 502. The first one-way valve 5012 is installed on the oil inlet of the negative pressure cylinder 502, and the second one-way valve 5013 is installed on the oil outlet of the negative pressure cylinder 502. The oil delivery hose 5010 is connected to the oil inlet of the negative pressure cylinder 502, and the other end of the oil delivery hose 5010 is connected to the oil outlet at the lower rear side of the oil storage tank 109. The lubrication pipe 5011 is connected to the oil outlet of the negative pressure cylinder 502 through a pipeline. The lubrication pipe 5011 is sleeved outside the lead screw 202. The second folding pipe 5014 is fixedly connected to the upper end of the lubrication pipe 5011, and the upper end of the second folding pipe 5014 is fixedly connected to the inner top surface of the support frame 101. The sliding rod 5015 is fixedly connected to the driving rod 504, and the sliding rod 5015 is slidably connected to the fixing plate 501. By arranging the lubrication component 5, the two lead screws 202 can be lubricated circularly from top to bottom, improving the operation precision and service life of the present bearing capacity testing device.

[0034] Working principle of this embodiment: When testing the load-bearing capacity of the aluminum alloy bicycle rim, firstly, four aluminum alloy bicycle rims are clamped and fixed to the four clamping assemblies 4. When clamping, first, the aluminum alloy bicycle rim is placed between the clamping plate 403 and the cushion block 404, and then the sleeve 6 is put on the outside of the hexagonal rotating block 408. When the sleeve 6 is put on the outside of the hexagonal rotating block 408, the sleeve 6 pushes the trapezoidal push block 703 toward the rear end of the box body 701, and at this time, the brake tooth block 704 is separated from the brake gear 407, and then the wrench is used to Rotate the sleeve 6 to rotate the hexagonal rotating block 408 and the threaded rod 406, and then the threaded tube 405 moves downward with the clamping plate 403 under the action of the thread, so as to clamp and fix the aluminum alloy bicycle wheel rim. After fixing, remove the sleeve 6 from the outside of the hexagonal rotating block 408. After removal, the sliding block 702 moves with the braking tooth block 704 towards the braking gear 407 under the action of the spring elastic force, and at this time, the braking tooth block 704 is meshed with the braking gear 407, thereby effectively locking the threaded rod 406.

[0035] After the four aluminum alloy bicycle rims are clamped and fixed, the controller 102 controls the motor 205 to operate, and rotates the synchronous shaft 204 and the two lead screws 202. Then, the two nuts 203 move the sliding plate 201 and the load-bearing capacity testing mechanism 3 downward under the action of the threads, so that the U-shaped bayonet 305 opened at the lower end of the lower pressure frame 303 is clamped at the two ends of the axis on the aluminum alloy bicycle rim. Then, when the sliding plate 201 continues to move downward, the pressure value borne by the aluminum alloy bicycle rim will be detected by the force sensor 301, and then transmitted to the controller 102, and finally the pressure value borne by the aluminum alloy bicycle rim will be displayed on the display screen of the controller 102. When the pressure value borne by the aluminum alloy bicycle rim reaches the standard, the controller 102 will control the motor 205 to reverse the rotating shaft, and finally move the sliding plate 201 and the load-bearing capacity testing mechanism 3 upward to reset.

[0036] After testing the pressure value of an aluminum alloy bicycle rim, the controller 102 controls the shaft of the driving motor 107 to rotate the driving disc 1016 clockwise for one circle, thereby driving the toggle column 1017 to rotate clockwise for one circle. At this time, the toggle column 1017 will drive the groove wheel 106 to rotate a quarter of a circle counterclockwise, that is, ninety degrees, thereby driving the vertical shaft 104 and the rotating table 105 to rotate ninety degrees counterclockwise, and finally the positions of the four clamping assemblies 4 and the four aluminum alloy bicycle rims are switched counterclockwise, and then the load-bearing capacity of the next aluminum alloy bicycle rim is tested.

[0037] During the up-and-down movement of the sliding plate 201, the two lubricating components 5 move up and down. At this time, under the action of the fixed rack 108, the driving gear 508 drives the driving shaft 506 and the driving circular plate 507 to rotate. Then, the driving circular plate 507 drives the driving column 509 to rotate. Next, through the driving column 509, the driving block 505, the driving rod 504, the piston rod 503 and the piston move reciprocally. When the piston moves towards the barrel opening of the negative pressure cylinder 502 inside the negative pressure cylinder 502, negative pressure will be generated inside the negative pressure cylinder 502, thereby extracting the air inside the oil delivery hose 5010, generating negative pressure inside the oil delivery hose 5010, sucking the lubricating oil inside the storage tank 109 and conveying it into the lubricating pipe 5011, and finally spraying the lubricating oil onto the two lead screws 202 for lubrication operation. The lubricated lubricating oil flows downward back into the storage tank 109, thus realizing the circulating lubrication effect on the two lead screws 202 from top to bottom, and further enabling the two lead screws 202 to be lubricated in a timely and effective manner.

[0038] In this article, the following points need to be noted: 1. The attached drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure. Other structures can refer to the general design.

[0039] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0040] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A device for testing the load-bearing capacity of an aluminum alloy bicycle wheel rim, comprising: A test bench (1), wherein a support frame (101) is installed on the rear side of the upper end surface of the test bench (1); the support frame (101) is provided with a lifting mechanism (2), and a load-bearing capacity testing mechanism (3) is installed on the front side of the lifting mechanism (2); a vertical rotating shaft (104) is rotatably connected to the test bench (1), a rotating table (105) is fixedly connected to the upper end of the vertical rotating shaft (104), and four clamping assemblies (4) are installed in a circular array on the upper end surface of the rotating table (105), each clamping assembly (4) clamps an aluminum alloy bicycle wheel rim, and each clamping assembly (4) is provided with an anti-loosening assembly (7); a lubricating component (5) is provided on the lifting mechanism (2); The clamping assembly (4) comprises a base (401), an L-shaped support block (402), a threaded rod (406) and a brake gear (407); the base (401) is mounted on the upper end surface of the rotating platform (105); the upper portion of the base (401) is fixedly connected to the L-shaped support block (402); the L-shaped support block (402) is rotatably connected to the threaded rod (406); and the upper outer portion of the threaded rod (406) is fixedly connected to the brake gear (407); The anti-loosening assembly (7) comprises a box body (701), a sliding block (702), a trapezoidal push block (703) and a braking tooth block (704); the box body (701) is mounted on the top of the L-shaped support block (402); the sliding block (702) is slidably connected inside the box body (701); the braking tooth block (704) is fixedly connected to the head end of the sliding block (702); and the trapezoidal push block (703) is fixedly connected to the upper part of the sliding block (702).

2. The aluminum alloy bicycle wheel rim load-bearing capacity testing device according to claim 1, characterized in that: A controller (102) is installed at the front left side of the test bench (1) via a bracket, four vertical guide rods (103) are arranged inside the support frame (101), and two fixed racks (108) are fixedly connected to the rear side of the support frame (101) in a bilaterally symmetrical manner; six universal ball bearings (1015) are installed in a circular array on the upper end surface of the test bench (1) below the rotating table (105), and the universal balls on the six universal ball bearings (1015) are all rollingly connected to the bottom end surface of the rotating table (105).

3. The aluminum alloy bicycle wheel rim load-bearing capacity testing device according to claim 1, characterized in that: A grooved wheel (106) is installed at the lower end of the vertical rotating shaft (104), the driving motor (107) is installed at the bottom of the test bench (1), and a driving disc (1016) is fixedly connected to the rotating shaft of the driving motor (107), a notched disc (1018) is fixedly connected to the middle of the upper end surface of the driving disc (1016), and a toggle column (1017) is provided at the edge of the upper end surface of the driving disc (1016), and when the driving disc (1016) rotates with the toggle column (1017), the toggle column (1017) can be slidably connected to the strip groove provided on the grooved wheel (106).

4. The aluminum alloy bicycle wheel rim load-bearing capacity testing device according to claim 2, characterized in that: An oil storage tank (109) is installed on the bottom end surface of the support frame (101), and an oil tank cover plate (1010) is installed on the top of the oil storage tank (109). The top of the oil tank cover plate (1010) is provided with two oil return ports (1011) in a bilaterally symmetrical manner, and each oil return port (1011) is fixedly connected to the upper end of a first folding tube (1012). A U-shaped baffle plate (1013) is provided inside the oil storage tank (109), and a transparent window (1014) is fixedly inlaid on the rear end surface of the oil storage tank (109).

5. The aluminum alloy bicycle wheel rim load-bearing capacity testing device according to claim 4, characterized in that: The lifting mechanism (2) comprises a sliding plate (201), a screw rod (202), a nut (203), a synchronous shaft (204) and a driving motor (205); the sliding plate (201) is slidably connected to four vertical guide rods (103); a nut (203) is fixedly connected to both left and right sides of the bottom end surface of the sliding plate (201); the lower end of the nut (203) is fixedly connected to the upper end of the first folding tube (1012); a screw rod (202) penetrating the sliding plate (201) is threadedly connected inside each nut (203); the upper ends of the two screw rods (202) are rotatably connected to the upper part of the support frame (101); and the lower ends of the two screw rods (202) are rotatably connected to the oil storage tank (1012). 109), and the lower ends of the two screw rods (202) penetrate the oil tank cover plate (1010); the synchronous shaft (204) is rotatably connected to the top surface of the support frame (101), and a first bevel gear is installed at both left and right ends of the synchronous shaft (204), and a driven pulley is installed outside the synchronous shaft (204); the driving motor (205) is installed at the top of the support frame (101), and a driving pulley is installed on the rotating shaft of the driving motor (205), and the driving pulley is connected to the driven pulley through a belt transmission, and a second bevel gear is installed at the upper end of each screw rod (202), and the two second bevel gears are respectively meshed with the two first bevel gears, and the two screw rods (202) are distributed in a left-right symmetrical shape.

6. The aluminum alloy bicycle wheel rim load-bearing capacity testing device according to claim 5, characterized in that: The load-bearing capacity testing mechanism (3) comprises a force sensor (301), a connecting plate (302), a lower pressing frame (303), a guide rod (304) and a U-shaped bayonet (305); the upper end of the force sensor (301) is mounted on the front bottom end surface of the sliding plate (201), and the connecting plate (302) is mounted on the lower end of the force sensor (301); a guide rod (304) penetrating the sliding plate (201) is fixedly connected to the four corners of the upper end surface of the connecting plate (302); the lower pressing frame (303) is fixedly connected to the lower end surface of the connecting plate (302); and a U-shaped bayonet (305) is provided at the lower end of the lower pressing frame (303).

7. The aluminum alloy bicycle wheel rim load-bearing capacity testing device according to claim 1, characterized in that: The clamping assembly (4) further comprises a clamping plate (403), a cushion block (404), a threaded barrel (405) and a hexagonal rotating block (408); the clamping plate (403) is provided with two T-shaped sliders, and the clamping plate (403) is slidably connected to the L-shaped supporting block (402) via the T-shaped sliders; the upper end surface of the clamping plate (403) is fixedly connected with the threaded barrel (405), and the threaded barrel (405) is threadedly connected to the threaded rod (406); the cushion block (404) is fixedly connected to the upper end surface of the base (401); the hexagonal rotating block (408) is fixedly connected to the upper end of the threaded rod (406), and the outer portion of the hexagonal rotating block (408) is sleeved with a sleeve (6); and an aluminum alloy bicycle rim is clamped between the clamping plate (403) and the cushion block (404).

8. The aluminum alloy bicycle rim load-bearing capacity testing device according to claim 5, characterized in that: The lubricating component (5) comprises a fixed plate (501), a negative pressure cylinder (502), a piston rod (503), a driving rod (504), a driving block (505), a driving shaft (506), a driving circular plate (507), a driving gear (508), a driving column (509), an oil delivery hose (5010), a lubricating pipe (5011), a first one-way valve (5012), a second one-way valve (5013), a second folding pipe (5014) and a sliding rod (5015). The fixed plate (501) is fixedly connected to the upper end surface of the sliding plate (201). The fixed plate (501) A negative pressure cylinder (502) is fixedly connected to the sliding plate (201), a piston is fixedly connected to the piston rod (503), and the piston is in close contact with the inner circumference of the negative pressure cylinder (502), a driving rod (504) is fixedly connected to the outer end of the piston rod (503), a driving block (505) is fixedly connected to the driving rod (504), and a strip-shaped sliding groove is provided on the driving block (505), the driving shaft (506) is rotatably connected to the upper end surface of the sliding plate (201), and the front and rear ends of the driving shaft (506) are fixedly connected to a driving circular plate (507) and a driving gear (508), and the driving gear (508) is meshed with the fixed rack (108), a driving column (509) is arranged at the edge of the front end surface of the driving circular plate (507), and the front end of the driving column (509) is slidably connected with the strip-shaped slide groove provided on the driving block (505); an oil inlet and an oil outlet are arranged on the negative pressure cylinder (502), and a first one-way valve (5012) is installed on the oil inlet of the negative pressure cylinder (502), and a second one-way valve (5013) is installed on the oil outlet of the negative pressure cylinder (502), and an oil delivery hose (5010) is connected to the oil inlet of the negative pressure cylinder (502). The other end of the hose (5010) is connected to the oil outlet at the lower rear side of the oil storage tank (109); the oil outlet of the negative pressure cylinder (502) is connected to a lubrication pipe (5011) via an oil pipe; the lubrication pipe (5011) is sleeved outside the screw rod (202); the upper end of the lubrication pipe (5011) is fixedly connected to a second folding pipe (5014); the upper end of the second folding pipe (5014) is fixedly connected to the top end surface inside the support frame (101); the driving rod (504) is fixedly connected to a sliding rod (5015); the sliding rod (5015) is slidably connected to the fixed plate (501).

9. The aluminum alloy bicycle rim load-bearing capacity testing device according to claim 1, characterized in that: A spring is arranged inside the box body (701) at the rear end of the sliding block (702), two strip-shaped grooves are provided inside the box body (701), and two strip-shaped sliding blocks are arranged on the sliding block (702), and the two strip-shaped sliding blocks are respectively slidably connected to the two strip-shaped grooves.

10. The aluminum alloy bicycle rim load-bearing capacity testing device according to claim 7, characterized in that: When the sleeve (6) is sleeved onto the outside of the hexagonal rotating block (408), the sleeve (6) pushes the trapezoidal push block (703) toward the rear end of the box body (701), and at this time the brake tooth block (704) is separated from the brake gear (407); when the sleeve (6) is removed from the outside of the hexagonal rotating block (408), the sliding block (702) moves with the brake tooth block (704) toward the direction close to the brake gear (407), and at this time the brake tooth block (704) is meshed with the brake gear (407).

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