Electric wheelchair performance testing device and testing method thereof

Abstract

The invention discloses an electric wheelchair performance testing device and a testing method thereof, and the electric wheelchair performance testing device comprises a bottom plate, a pair of multi-state simulation roller assemblies, a plurality of groups of simulation protection suites, and a distance adjustment driving assembly. The pair of multi-state simulation roller assemblies are rotationally assembled in the bottom plate, each multi-state simulation roller assembly comprises a test roller, and the test roller is composed of a first roller and a second roller. By arranging the multi-state simulation roller assembly, the simulation protection kit and the distance adjustment driving assembly, the roller can simulate various different road surface states according to test requirements, the reliability of fatigue performance test on the wheelchair is greatly improved, and the convenience of adjusting the road surface state simulated by the roller is simplified; the distance between the rollers can be adaptively adjusted according to different distances between wheelchair wheels, and the applicability and the test reliability of the double-roller fatigue testing machine are remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric wheelchair performance testing devices, and particularly relates to an electric wheelchair performance testing device and a testing method thereof. Background Art

[0002] An electric wheelchair performance testing device is a type of equipment used to evaluate the performance of electric wheelchairs. Among them, a double-roller fatigue testing machine is a common electric wheelchair performance testing device, mainly used to test the durability of electric wheelchairs or elderly scooters.

[0003] The double-roller fatigue testing machine mainly drives the wheelchair to move by rotating two rollers, so as to simulate the use conditions under different speeds, loads, and road surface conditions, and thus evaluate the fatigue performance of the wheelchair between static strength and dynamic range.

[0004] In the prior art, in order to simulate the fatigue performance of a wheelchair moving on different road surface states, different numbers and shapes of blocks are usually fixed on the outer surface of the roller to simulate different road surfaces. Although this method can make the roller simulate different road surfaces during rotation, there are problems of limited simulation effect and cumbersome adjustment process, so that the double-roller fatigue testing machine cannot meet the requirements for testing the fatigue performance of wheelchairs under different road surface states.

[0005] The information disclosed in this background art section is only intended to enhance the overall understanding of the present invention and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide an electric wheelchair performance testing device and a testing method thereof, which can adaptively adjust the outer surface of the roller according to the test requirements, so that the double-roller testing machine can meet the requirements for testing the fatigue performance of wheelchairs under different road surface states.

[0007] To achieve the above purpose, the technical solution provided by a specific embodiment of the present invention is as follows: An electric wheelchair performance testing device includes: a bottom plate, a pair of multi-state simulation roller assemblies, multiple groups of simulation protection kits, and an adjustable distance drive assembly.

[0008] A pair of the multi-state simulation roller assemblies are rotationally assembled in the bottom plate. The multi-state simulation roller assembly includes a test roller, which is composed of a first roller and a second roller. A linkage plug-in positioning unit is arranged between the first roller and the second roller. Inflatable change units are fixedly connected to the outer sides of the first roller and the second roller, and drive fixing parts are fixedly connected to the opposite ends of the first roller and the second roller.

[0009] Multiple groups of the simulation protection kits are respectively sleeved outside the first roller and the second roller. The simulation protection kit includes an elastic sleeve layer which is sleeved outside the first roller or the second roller, and fixing rings are fixedly sleeved at both ends of the elastic sleeve layer.

[0010] The distance adjustment driving component is assembled between the test roller and the bottom plate, and the distance adjustment driving component is used for adjusting the distance of the one-to-many state simulation roller component.

[0011] In one or more embodiments of the present invention, multiple groups of uniformly distributed support feet are fixedly connected below the bottom plate. The bottom plate is supported and positioned by the multiple groups of support feet, ensuring the use stability of the bottom plate. A limit frame is fixedly connected above the bottom plate, and multiple fixing frames are fixedly connected below the limit frame. Straps can be used to connect and fix the wheelchair to be tested with the fixing frames, ensuring the stability of the performance test of the wheelchair.

[0012] In one or more embodiments of the present invention, control air channels communicating with each other are provided in both the first roller and the second roller. This facilitates the flow of compressed air along the control air channels in the first roller and the second roller, providing a basis for the subsequent movement of the simulation top block and the expansion of the elastic sleeve layer. A delivery air channel is provided in the driving fixing part fixed at one end of the first roller away from the second roller, and the delivery air channel is communicated with the control air channel. This facilitates the delivery of compressed air into the control air channel through the delivery air channel. An anti - detachment limit collar is integrally formed at one end of the second roller close to the first roller, and the anti - detachment limit collar is in plug - in fit with the first roller. The first roller and the second roller are assembled and limited through the cooperation of the anti - detachment limit collar and the first roller.

[0013] In one or more embodiments of the present invention, the linkage plug - in positioning unit includes multiple positioning control cylinders, and the multiple positioning control cylinders are all fixedly assembled at one end of the second roller close to the first roller. The positioning control cylinder plays a role in receiving and sliding - limiting the positioning block. Multiple positioning blocks are slidably installed in the multiple positioning control cylinders, and one end of the positioning block outside the positioning control cylinder is arranged in a semi - spherical shape. Multiple uniformly distributed positioning grooves matched with the positioning block are provided on one side of the first roller close to the second roller. The first roller and the second roller are locked and positioned through the cooperation of the positioning block and the positioning groove, so that the first roller and the second roller can rotate synchronously under the cooperation of the positioning block and the positioning groove. The number of the positioning grooves is an integer multiple of the number of the positioning blocks. This facilitates the adjustment of the fixed misalignment angle between the first roller and the second roller.

[0014] In one or more embodiments of the present invention, a connecting spring is fixedly connected between the positioning block and the positioning control cylinder. The positioning block is pulled and reset by the contraction and reset of the connecting spring. A plurality of uniformly distributed positioning air channels are formed in the second roller, and both ends of the plurality of positioning air channels are respectively communicated with the control air channel and the positioning control cylinder. This facilitates the compressed air in the control air channel to be transported into the positioning control cylinder along the positioning air channels, so that the positioning block is continuously engaged in the positioning groove under the action of gas pressure.

[0015] In one or more embodiments of the present invention, the inflatable change unit includes multiple groups of ejection control boxes, and the multiple groups of ejection control boxes are fixedly assembled on the outer side of the first roller or the second roller. The ejection control box plays a role in receiving and moving limit for the simulation ejecting block. Multiple simulation ejecting blocks are slidably assembled in the multiple groups of ejection control boxes. The unevenness of the outer surface of the test roller is regulated by the protruding movement of the simulation ejecting block, so that the test roller can simulate road surface states with different roughness degrees. A plurality of uniformly distributed reset springs are fixedly connected between the simulation ejecting block and the ejection control box. The simulation ejecting block is connected and limited by the contraction and reset of the multiple groups of reset springs.

[0016] In one or more embodiments of the present invention, a plurality of uniformly distributed ejection air grooves are formed in both the first roller and the second roller, and both ends of the plurality of ejection air grooves are respectively communicated with the ejection control box and the control air channel. The ejection air grooves connect and conduct the ejection control box and the control air channel, so that compressed air can be transported into the ejection control box along the ejection air grooves, thereby driving and controlling the protruding state of the simulation ejecting block. A plurality of uniformly distributed blocking grooves are formed on the sides of the first roller and the second roller facing away from each other. The plurality of blocking grooves are arranged in cooperation with the ejection air grooves, and the diameter of the plurality of blocking grooves is larger than the width of the ejection air grooves. This facilitates controlling the conduction state of the ejection air grooves by inserting and blocking the blocking grooves.

[0017] In one or more embodiments of the present invention, a positioning plate is fixedly connected to the outer side of the driving fixing member. The positioning plate plays a role in assembling and limiting the blocking piston rod. A plurality of uniformly distributed blocking piston rods are threadedly connected in the positioning plate, and the blocking piston rods are arranged in cooperation with the blocking grooves. The blocking piston rods play a role in blocking and limiting the blocking grooves.

[0018] In one or more embodiments of the present invention, the inner wall of the elastic sleeve layer is fixedly connected to the side of the simulation top block located outside the ejection control box. The inner surface of the elastic sleeve layer and the outer surface of the first roller or the second roller cooperate to form an inflation change cavity. A plurality of uniformly distributed auxiliary air channels are formed in the first roller and the second roller. Both ends of the plurality of auxiliary air channels are respectively communicated with the conveying air channel and the inflation change cavity. A plurality of uniformly distributed insertion limit slots are formed on the sides of the first roller and the second roller facing away from each other. The plurality of insertion limit slots and the positioning plate are staggered. A sealing plug is inserted into each of the plurality of insertion limit slots. The sealing plug plays a role in blocking and limiting the auxiliary air channel.

[0019] A test method for an electric wheelchair performance test device includes the following steps: S1. First, when compressed air is not filled into the conveying air channel, the positioning blocks in multiple groups of positioning control cylinders can contract in the positioning control cylinders under the pulling and resetting action of the connecting springs. In this way, in the non-inflated state, the first roller and the second roller are in a rotatable connection state, which enables the simulation road surface states of the four wheels of the wheelchair to be independently adjusted according to the test requirements by independently adjusting the first roller and the second roller; S2. When it is necessary to adjust the simulation road surface state of the test roller, the rotation angles of the first roller and the second roller can be regulated according to whether the simulation road surface states of the four wheels of the wheelchair are consistent, so that the first roller and the second roller are in a misaligned state or a unified state; S3. When it is necessary to adjust the simulation road surface state of the test roller, compressed air can be conveyed into the control air channel through the conveying air channel. The compressed air can be conveyed to the ejection control box along the control air channel and the ejection air groove, so that the simulation top block can extend under the action of the gas pressure in the ejection control box, and the greater the gas pressure, the longer the protruding length of the simulation top block. Therefore, the unevenness of the outer surface of the test roller can be adjusted by controlling the pressure of the compressed air in the control air channel; S4. At the same time, the compressed air conveyed in the conveying air channel can also be conveyed into the inflation change cavity along the auxiliary air channel, so that the elastic sleeve layer can expand synchronously under the action of the gas pressure, so that the outer surface of the test roller can be uneven under the expansion action of the elastic sleeve layer. In the actual adjustment process, the conduction state of the auxiliary air channel can be controlled by inserting the sealing plug, and the conduction state of the ejection air groove can be controlled by controlling the movement of the plugging piston rod. The operator can control the ejection of the simulation top block and the expansion state of the elastic sleeve layer by controlling the assembly state of the sealing plug or the plugging piston rod, so that the test roller simulates different road surface states according to the test requirements; S5. The distance between the one-to-many state simulation roller assemblies can be adjusted by the distance adjustment drive assembly according to the wheel spacing of the wheelchair to be tested. After adjustment, the wheelchair can be placed on the one-to-many state simulation roller assemblies. Subsequently, the fatigue resistance performance of the wheelchair can be tested by the rotation of the one-to-many state simulation roller assemblies.

[0020] Compared with the prior art, by setting the multi-state simulation roller assemblies in the present invention, the rollers can simulate a variety of different road surface states according to the test requirements, greatly improving the reliability of the fatigue performance test of the wheelchair and simplifying the convenience of adjusting the road surface state simulated by the rollers. By setting the simulation protection kit, it can not only assist the rollers in simulating the road surface state, but also protect the rollers by sleeving, improving the convenience of subsequent cleaning and maintenance of the rollers. By setting the distance adjustment drive assembly, the distance between the rollers can be adaptively adjusted according to the different wheel spacings of the wheelchair, significantly improving the applicability and test reliability of the double-roller fatigue testing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 Is a perspective view of the electric wheelchair performance testing device in an embodiment of the present invention; Figure 2 Is a partial structural schematic diagram of the electric wheelchair performance testing device in an embodiment of the present invention; Figure 3 Is a partial structural schematic diagram of the electric wheelchair performance testing device in another angle in an embodiment of the present invention; Figure 4 Is a perspective view of the multi-state simulation roller assemblies and the simulation protection kit in an embodiment of the present invention; Figure 5 Is a perspective view of the multi-state simulation roller assemblies in an embodiment of the present invention; Figure 6 Is a partial structural cross-sectional view of the multi-state simulation roller assemblies and the simulation protection kit in an embodiment of the present invention; Figure 7 Is Figure 6 The structural schematic diagram at position A in Figure 8 Is a partial structural cross-sectional view of the multi-state simulation roller assemblies and the simulation protection kit in another angle in an embodiment of the present invention; Figure 9 For Figure 8 Schematic diagram of the structure at position B in Figure 10 Cross-sectional view of the multi-state simulation drum assembly and the simulation protection kit in an embodiment of the present invention; Figure 11 For Figure 10 Schematic diagram of the structure at position C in Figure 12 For Figure 10 Schematic diagram of the structure at position D in

[0023] Description of main reference numerals: 1 - bottom plate, 101 - support feet, 102 - limit frame, 103 - fixing frame, 2 - multi-state simulation drum assembly, 201 - test drum, 2011 - first drum, 2012 - second drum, 202 - drive fixing member, 203 - control air duct, 204 - conveying air duct, 205 - anti-disengagement limit collar, 206 - positioning control cylinder, 207 - positioning block, 208 - connecting spring, 209 - positioning air duct, 210 - ejecting control box, 211 - simulation ejecting block, 212 - reset spring, 213 - ejecting air groove, 214 - plugging groove, 215 - positioning plate, 216 - plugging piston rod, 3 - simulation protection kit, 301 - elastic sleeve layer, 302 - fixing ring, 303 - auxiliary air duct, 304 - closing plug, 4 - distance adjustment drive assembly, 401 - sliding carrier platform, 402 - adjusting threaded rod, 403 - gear tooth belt, 404 - adjusting handwheel, 405 - synchronous pulley, 406 - synchronous belt, 407 - tensioning pulley, 408 - pulley frame, 409 - telescopic rod, 410 - drive motor, 411 - driving belt pulley, 412 - transmission belt, 413 - driven belt pulley, 414 - linkage rotating shaft. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0025] As Figures 1 to 12 shown, an electric wheelchair performance test device in an embodiment of the present invention includes: a bottom plate 1, a pair of multi-state simulation drum assemblies 2, multiple groups of simulation protection kits 3, and a distance adjustment drive assembly 4.

[0026] As Figure 1As shown, multiple groups of uniformly distributed support feet 101 are fixedly connected below the bottom plate 1. The bottom plate 1 is supported and positioned by multiple groups of support feet 101, ensuring the stability of the bottom plate 1 during use.

[0027] As Figure 1 shown, a limit frame 102 is fixedly connected above the bottom plate 1, and multiple fixing frames 103 are fixedly connected below the limit frame 102. Straps can be used to connect and fix the wheelchair to be tested with the fixing frames 103, ensuring the stability of the performance test of the wheelchair.

[0028] As Figure 10 shown, a pair of multi-state simulation drum assemblies 2 are rotationally assembled in the bottom plate 1. The multi-state simulation drum assembly 2 includes a test drum 201, and the test drum 201 is composed of two parts, a first drum 2011 and a second drum 2012. By independently adjusting the two parts of the first drum 2011 and the second drum 2012, the road surface state of the wheels of the wheelchair to be tested can be independently adjusted, improving the effect of adjusting the simulated road surface state of the wheelchair.

[0029] As Figures 10 to 12 shown, control air ducts 203 that communicate with each other are provided in both the first drum 2011 and the second drum 2012. This facilitates the flow of compressed air along the control air ducts 203 in the first drum 2011 and the second drum 2012, providing a basis for the subsequent movement of the simulation top block 211 and the expansion of the elastic sleeve layer 301.

[0030] As Figure 10 shown, a delivery air duct 204 is provided in the drive fixing member 202 fixed to one end of the first drum 2011 away from the second drum 2012, and the delivery air duct 204 communicates with the control air duct 203. This facilitates the delivery of compressed air into the control air duct 203 through the delivery air duct 204.

[0031] As Figures 10 to 12 shown, an anti-disengagement limit collar 205 is integrally formed at one end of the second drum 2012 close to the first drum 2011, and the anti-disengagement limit collar 205 is in plug-in fit with the first drum 2011. The first drum 2011 and the second drum 2012 are assembled and limited by the cooperation of the anti-disengagement limit collar 205 and the first drum 2011.

[0032] As Figures 10 to 12 shown, a linkage plug-in positioning unit is arranged between the first drum 2011 and the second drum 2012. The linkage plug-in positioning unit includes multiple positioning control cylinders 206, and multiple positioning control cylinders 206 are fixedly assembled at one end of the second drum 2012 close to the first drum 2011. The positioning control cylinders 206 play a role in receiving and slidingly limiting the positioning blocks 207.

[0033] Specifically, the number of the positioning control cylinders 206 is four, and the first roller 2011 and the second roller 2012 can be effectively positioned through four groups of positioning blocks 207, thereby ensuring the stability of the synchronous rotation of the first roller 2011 and the second roller 2012.

[0034] like Figures 10 to 12 As shown, a plurality of positioning control cylinders 206 are all slidably provided with positioning blocks 207, one end of the positioning blocks 207 located outside the positioning control cylinder 206 is arranged in a semi-spherical shape, and a plurality of evenly distributed positioning grooves cooperating with the positioning blocks 207 are provided on a side of the first roller 2011 close to the second roller 2012. The first roller 2011 and the second roller 2012 are locked and positioned by the cooperation of the positioning blocks 207 and the positioning grooves, so that the first roller 2011 and the second roller 2012 can rotate synchronously under the cooperation of the positioning blocks 207 and the positioning grooves.

[0035] It is worth noting that the number of the positioning grooves is an integral multiple of the number of the positioning blocks 207 , so as to facilitate the adjustment of the first roller 2011 and the second roller 2012 to fix the misalignment angle.

[0036] like Figures 10 to 12 As shown, a connecting spring 208 is fixedly connected between the positioning block 207 and the positioning control cylinder 206. The positioning block 207 is pulled and reset by the contraction and reset of the connecting spring 208.

[0037] like Figures 10 to 12 As shown, a plurality of evenly distributed positioning air channels 209 are provided in the second roller 2012, and the two ends of the plurality of positioning air channels 209 are respectively connected to the control air channel 203 and the positioning control cylinder 206. It is convenient for the compressed air in the control air channel 203 to be transported to the positioning control cylinder 206 along the positioning air channel 209, so that the positioning block 207 is continuously engaged in the positioning groove under the action of gas pressure.

[0038] like Figures 4 to 6 As shown, the ends of the first roller 2011 and the second roller 2012 that are away from each other are fixedly connected with a driving fixture 202. The driving fixture 202 clamps and fixes the first roller 2011 and the second roller 2012 and drives them to rotate.

[0039] like Figures 6 to 11 As shown, the outer sides of the first roller 2011 and the second roller 2012 are both fixedly connected with an inflatable change unit, which includes a plurality of ejection control boxes 210, which are fixedly mounted on the outer sides of the first roller 2011 or the second roller 2012. The ejection control boxes 210 serve to store and limit the movement of the simulated ejector block 211.

[0040] like Figures 6 to 11As shown, simulation ejector blocks 211 are slidably assembled in multiple ejector control boxes 210. By extending and moving the simulation ejector blocks 211, the unevenness of the outer surface of the test drum 201 is regulated, so that the test drum 201 can simulate road conditions with different roughness levels.

[0041] As Figures 6 to 11 shown, multiple uniformly distributed return springs 212 are fixedly connected between the simulation ejector blocks 211 and the ejector control boxes 210. The simulation ejector blocks 211 are connected and limited by the contraction and reset of the multiple return springs 212.

[0042] As Figures 6 to 11 shown, multiple uniformly distributed ejector air grooves 213 are provided in both the first drum 2011 and the second drum 2012. Both ends of the multiple ejector air grooves 213 are respectively communicated with the ejector control box 210 and the control air duct 203. The ejector air grooves 213 connect and conduct the ejector control box 210 and the control air duct 203, so that compressed air can be transported into the ejector control box 210 along the ejector air grooves 213, thereby driving and controlling the extended state of the simulation ejector blocks 211.

[0043] As Figures 6 to 11 shown, multiple uniformly distributed plugging grooves 214 are provided on the sides of the first drum 2011 and the second drum 2012 facing away from each other. The multiple plugging grooves 214 are arranged in cooperation with the ejector air grooves 213, and the diameters of the multiple plugging grooves 214 are larger than the widths of the ejector air grooves 213. It is convenient to control the conduction state of the ejector air grooves 213 by plugging the plugging grooves 214.

[0044] As Figures 6 to 11 shown, a positioning plate 215 is fixedly connected to the outside of the driving fixing member 202. The positioning plate 215 plays a role in assembling and limiting the plugging piston rod 216. Multiple uniformly distributed plugging piston rods 216 are threadedly connected in the positioning plate 215, and the plugging piston rods 216 are arranged in cooperation with the plugging grooves 214. The plugging piston rods 216 play a role in plugging and limiting the plugging grooves 214.

[0045] As Figures 6 to 9As shown, multiple sets of simulated protection kits 3 are respectively mounted on the outside of the first roller 2011 and the second roller 2012, and the simulated protection kits 3 include an elastic sleeve layer 301, which is mounted on the outside of the first roller 2011 or the second roller 2012. By mounting the elastic sleeve layer 301, not only can the first roller 2011 and the second roller 2012 be protected from wear and dust, but also a convexity with a certain curvature can be formed on the surface of the test roller 201 by lifting the elastic sleeve layer 301 through the extension of the simulated top block 211, further improving the effect of adjusting and simulating the concave-convex state of the outer surface of the test roller 201 by the simulated top block 211.

[0046] like Figures 6 to 9 As shown, both ends of the elastic sleeve layer 301 are fixedly sleeved with fixing rings 302. The fixing rings 302 play a role in assembling and fixing the elastic sleeve layer 301.

[0047] It is worth noting that the outer side of the fixing ring 302 may be provided with marking scale lines, and the rotation angles of the first roller 2011 and the second roller 2012 may be adjusted by the marking scale lines, thereby ensuring the accuracy and convenience of the misalignment adjustment of the first roller 2011 and the second roller 2012.

[0048] Specifically, the inner wall of the elastic sleeve layer 301 is fixedly connected to one side of the simulated ejection block 211 outside the ejection control box 210 , so that the elastic sleeve layer 301 can move synchronously with the extension of the simulated ejection block 211 .

[0049] The inner surface of the elastic sleeve 301 cooperates with the outer surface of the first roller 2011 or the second roller 2012 to form an inflatable change chamber. The elastic sleeve 301 is expanded by delivering compressed air into the inflatable change chamber, and the expansion of the elastic sleeve 301 makes the outer surface of the test roller 201 uneven.

[0050] like Figures 8 to 9 As shown, a plurality of evenly distributed auxiliary air ducts 303 are provided in the first roller 2011 and the second roller 2012, and the two ends of the plurality of auxiliary air ducts 303 are respectively connected to the conveying air duct 204 and the inflation change chamber, and a plurality of evenly distributed plug-in limit grooves are provided on the side opposite to the second roller 2011 and 2012, and the plurality of plug-in limit grooves are staggered with the positioning plate 215.

[0051] like Figures 8 to 9 As shown, a plurality of plugging and limiting grooves are all plugged with closing plugs 304. The closing plugs 304 play a role of blocking and limiting the auxiliary airway 303.

[0052] like Figures 1 to 3As shown in the figure, the distance adjustment drive assembly 4 is assembled between the test drum 201 and the bottom plate 1. The distance adjustment drive assembly 4 is used to adjust the distance of the one-to-many state simulation drum assembly 2. The distance adjustment drive assembly 4 includes a sliding carrier 401, which is slidably assembled in the bottom plate 1 and is assembled below a group of multi-state simulation drum assemblies 2. The sliding carrier 401 plays a role in assembling and limiting the single-group multi-state simulation drum assembly 2, and adjusts the distance of the one-to-many state simulation drum assembly 2 by sliding and adjusting the single-group multi-state simulation drum assembly 2.

[0053] As Figures 2 to 3 shown in the figure, a pair of adjusting threaded rods 402 are threadedly connected below the sliding carrier 401. By controlling the rotation of the adjusting threaded rods 402, the sliding carrier 401 can drive the single-group multi-state simulation drum assembly 2 to slide in the bottom plate 1 under the action of internal and external threads.

[0054] As Figures 2 to 3 shown in the figure, one end of a pair of adjusting threaded rods 402 is linked by a gear tooth belt 403, and one end of a single adjusting threaded rod 402 is fixedly connected with an adjusting handwheel 404. The pair of adjusting threaded rods 402 can be synchronously driven through the cooperation of the adjusting handwheel 404 and the gear tooth belt 403.

[0055] As Figures 2 to 3 shown in the figure, synchronous pulleys 405 are evenly arranged at one end of the one-to-many state simulation drum assembly 2. The synchronous pulleys 405 are fixedly sleeved on the outside of the driving fixing member 202, and a synchronous belt 406 is sleeved on the outside of the pair of synchronous pulleys 405. The pair of one-to-many state simulation drum assemblies 2 can be synchronously driven through the cooperation of the synchronous pulleys 405 and the synchronous belt 406.

[0056] As Figures 2 to 3 shown in the figure, a tensioning pulley 407 is arranged between the pair of synchronous pulleys 405. A wheel frame 408 is rotatably assembled on the outside of the tensioning pulley 407, and a telescopic rod 409 is fixedly connected below the wheel frame 408. The synchronous belt 406 can be kept tensioned through the cooperation of the tensioning pulley 407, the wheel frame 408 and the telescopic rod 409, improving the stability of synchronous transmission of the synchronous pulleys 405 and the synchronous belt 406.

[0057] As Figures 2 to 3 shown in the figure, a driving motor 410 is fixedly assembled on one side of the bottom plate 1. The driving motor 410 plays a role in providing power, and drives the transmission pulley 411 to rotate by controlling the operation of the driving motor 410.

[0058] As Figures 2 to 3As shown, the output shaft of the drive motor 410 is fixedly connected with a belt pulley 411. A transmission belt 412 is sleeved outside the belt pulley 411. A driven belt pulley 413 is sleeved on the side of the transmission belt 412 away from the belt pulley 411. A linkage rotating shaft 414 is fixedly connected inside the driven belt pulley 413. The linkage rotating shaft 414 is fixedly connected with a single driving fixing member 202. Through the cooperation of the belt pulley 411, the transmission belt 412, the driven belt pulley 413 and the linkage rotating shaft 414, the single driving fixing member 202 can be independently driven.

[0059] A test method for an electric wheelchair performance test device includes the following steps: First, when compressed air is not filled into the air delivery channel 204, the positioning blocks 207 in multiple groups of positioning control cylinders 206 can contract in the positioning control cylinders 206 under the pulling and resetting action of the connecting springs 208. In this way, in the non-inflated state, the first roller 2011 and the second roller 2012 are in a rotatably connected state, which also enables the simulated road surface states of the four wheels of the wheelchair to be independently adjusted by independently adjusting the first roller 2011 and the second roller 2012 according to the test requirements.

[0060] When it is necessary to adjust the simulated road surface state of the test roller 201, the rotation angles of the first roller 2011 and the second roller 2012 can be regulated according to whether the simulated road surface states of the four wheels of the wheelchair are consistent, so that the first roller 2011 and the second roller 2012 are in a misaligned state or a unified state.

[0061] When it is necessary to adjust the simulated road surface state of the test roller 201, compressed air can be delivered into the control air channel 203 through the air delivery channel 204. The compressed air can be delivered to the ejection control box 210 along the control air channel 203 and the top air outlet groove 213, so that the simulated ejecting block 211 can be ejected under the action of the gas pressure in the ejection control box 210, and a state where the longer the protruding length of the simulated ejecting block 211 is as the gas pressure is greater is presented. Thus, the concavity and convexity degree of the outer surface of the test roller 201 can be adjusted by controlling the pressure of the compressed air in the control air channel 203.

[0062] Meanwhile, the compressed air conveyed in the conveying air duct 204 can also be conveyed into the inflation change cavity along the auxiliary air duct 303, so that the elastic sleeve layer 301 can expand synchronously under the action of gas pressure, so that the outer surface of the test roller 201 can be uneven under the expansion action of the elastic sleeve layer 301. In the actual adjustment process, the conduction state of the auxiliary air duct 303 can be controlled by inserting a plugging plug 304, and the conduction state of the ejection air groove 213 can be controlled by controlling the movement of the plugging piston rod 216. The operator can control the pop-up of the simulation top block 211 and the expansion state of the elastic sleeve layer 301 by controlling the assembly state of the plugging plug 304 or the plugging piston rod 216, so that the test roller 201 can simulate different road surface states according to the test requirements.

[0063] When it is necessary to adjust the distance between the one-to-many state simulation roller assemblies 2, the pair of adjusting threaded rods 402 can be synchronously driven under the action of the gear tooth belt 403 by controlling the rotation of the adjusting handwheel 404. Subsequently, the sliding carrier table 401 can drive the single-group one-to-many state simulation roller assembly 2 to slide under the action of the internal and external threads, so as to realize the function of adjusting the distance between the one-to-many state simulation roller assemblies 2.

[0064] Subsequently, the driving belt pulley 411 can be driven to rotate by controlling the operation of the driving motor 410. The single driving fixing member 202 can rotate under the combined action of the driving belt pulley 411, the transmission belt 412, the driven belt pulley 413 and the linkage rotating shaft 414. The one-to-many state simulation roller assemblies 2 can rotate synchronously under the combined action of the synchronous belt pulley 405 and the synchronous belt 406. The fatigue performance test of the wheelchair can be carried out by the rotation of the one-to-many state simulation roller assemblies 2.

[0065] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0066] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric wheelchair performance testing device, characterized in that, Comprising: Base plate; A pair of multi-state simulation roller assemblies, rotatably assembled within the base plate. The multi-state simulation roller assembly includes a test roller, which is composed of two parts, a first roller and a second roller. A linkage plug-in positioning unit is arranged between the first roller and the second roller. Inflatable change units are fixedly connected to the outer sides of both the first roller and the second roller. Drive fixing parts are fixedly connected to the ends of the first roller and the second roller facing away from each other. Multiple groups of simulation protection kits, respectively sleeved on the outer sides of the first roller and the second roller. The simulation protection kit includes an elastic sleeve layer, which is sleeved on the outer side of the first roller or the second roller. Fixed rings are fixedly sleeved at both ends of the elastic sleeve layer. A distance adjustment drive assembly, assembled between the test roller and the base plate. The distance adjustment drive assembly is used to adjust the distance of the pair of multi-state simulation roller assemblies.

2. The electric wheelchair performance testing device according to claim 1, wherein, Multiple groups of uniformly distributed support feet are fixedly connected to the lower part of the base plate. A limit frame is fixedly connected to the upper part of the base plate. Multiple fixing frames are fixedly connected to the lower part of the limit frame.

3. The electric wheelchair performance testing device according to claim 1, characterized in that Control air channels communicating with each other are provided in both the first roller and the second roller. A delivery air channel is provided in the drive fixing part fixed to the end of the first roller facing away from the second roller. The delivery air channel is in communication with the control air channel. An anti-disengagement limit collar is integrally formed at the end of the second roller close to the first roller. The anti-disengagement limit collar is in plug-in fit with the first roller.

4. The electric wheelchair performance testing device according to claim 3, wherein The linkage plug-in positioning unit includes a plurality of positioning control cylinders, all of which are fixedly assembled at the end of the second roller close to the first roller. Positioning blocks are slidably installed in the plurality of positioning control cylinders. The end of the positioning block located outside the positioning control cylinder is arranged in a semi-spherical shape. A plurality of uniformly distributed positioning grooves cooperating with the positioning blocks are provided on the side of the first roller close to the second roller. The number of the positioning grooves is an integer multiple of the number of the positioning blocks.

5. The performance testing device for an electric wheelchair according to claim 4, characterized in that, A connecting spring is fixedly connected between the positioning block and the positioning control cylinder. A plurality of uniformly distributed positioning air channels are provided in the second roller. The two ends of the plurality of positioning air channels are respectively in communication with the control air channel and the positioning control cylinder.

6. The performance testing device for an electric wheelchair according to claim 5, characterized in that, The inflatable change unit includes multiple groups of ejection control boxes, which are fixedly assembled on the outer side of the first roller or the second roller. Simulation ejector blocks are slidably installed in the multiple groups of ejection control boxes. A plurality of uniformly distributed return springs are fixedly connected between the simulation ejector block and the ejection control box.

7. The electric wheelchair performance testing device according to claim 6, characterized in that A plurality of uniformly distributed ejection air grooves are provided in both the first roller and the second roller. The two ends of the plurality of ejection air grooves are respectively in communication with the ejection control box and the control air channel. A plurality of uniformly distributed blocking grooves are provided on the sides of the first roller and the second roller facing away from each other. The plurality of blocking grooves are arranged in cooperation with the ejection air grooves, and the diameter of the plurality of blocking grooves is larger than the width of the ejection air grooves.

8. The performance testing device for an electric wheelchair according to claim 7, wherein, A positioning plate is fixedly connected to the outer side of the drive fixing part. A plurality of uniformly distributed blocking piston rods are threadedly connected in the positioning plate. The blocking piston rods are arranged in cooperation with the blocking grooves.

9. The electric wheelchair performance testing device according to claim 8, characterized in that, The inner wall of the elastic sleeve is fixedly connected to a side of the simulated ejector block outside the ejection control box, the inner surface of the elastic sleeve cooperates with the outer surface of the first roller or the second roller to form an inflation change chamber, a plurality of evenly distributed auxiliary air ducts are provided in the first roller and the second roller, the two ends of the plurality of auxiliary air ducts are respectively connected to the conveying air duct and the inflation change chamber, a plurality of evenly distributed plug-in limit grooves are provided on the side opposite to the first roller and the second roller, the plurality of plug-in limit grooves are staggered with the positioning plate, and closing plugs are inserted in the plurality of plug-in limit grooves.

10. A testing method for the performance testing device of an electric wheelchair as described in claim 9, characterized in that, The following steps are involved: S1. First, when compressed air is not charged into the air delivery passage, the positioning blocks in the multiple positioning control cylinders can be retracted in the positioning control cylinders under the pulling and resetting action of the connecting springs, so that in the uninflated state, the first roller and the second roller are in a rotationally connected state, which also makes it possible to independently adjust the simulated road conditions of the four wheels of the wheelchair according to the test requirements by independently adjusting the first roller and the second roller; S2. When the simulated road surface state of the test roller needs to be adjusted, the rotation angles of the first roller and the second roller can be adjusted based on whether the simulated road surface states of the four wheels of the wheelchair are consistent, so that the first roller and the second roller are in a misaligned state or a uniform and consistent state; S3. When the simulated road surface state of the test roller needs to be adjusted, compressed air can be delivered to the control air channel through the delivery air channel, and the compressed air can be delivered to the ejection control box along the control air channel and the ejection air groove, so that the simulated ejector block can be extended by the gas pressure in the ejection control box, and the greater the gas pressure, the longer the protrusion length of the simulated ejector block, so that the concave-convex degree of the outer surface of the test roller can be adjusted by controlling the compressed air pressure in the control air channel; S4. At the same time, the compressed air transported in the delivery air channel can also be transported to the inflation change chamber along the auxiliary air channel, so that the elastic sleeve layer can be synchronously expanded under the action of the gas pressure, so that the outer surface of the test roller can present an uneven state under the action of the expansion of the elastic sleeve layer. In the actual adjustment process, the conduction state of the auxiliary air channel can be controlled by inserting a sealing plug, and the conduction state of the top outlet groove can be controlled by controlling the movement of the blocking piston rod. The operator can control the ejection of the simulated top block and the expansion state of the elastic sleeve layer by controlling the assembly state of the sealing plug or the blocking piston rod, so that the test roller simulates different road conditions according to the test requirements; S5. The spacing of the one-to-many state simulation roller assembly can be adjusted by using a spacing adjustment drive assembly according to the spacing of the wheels of the wheelchair to be tested. After the adjustment, the wheelchair can be placed on the one-to-many state simulation roller assembly, and then the fatigue resistance of the wheelchair can be tested by rotating the one-to-many state simulation roller assembly.

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