Wheelchair frame pressure resistance detection device and detection method

Abstract

The present invention relates to the field of wheelchair manufacturing technology, and specifically to a wheelchair frame pressure resistance testing device and testing method, comprising a frame-shaped base, a stable moving mechanism and a testing mechanism. The frame-shaped base is provided with a stable moving mechanism, and the stable moving mechanism is connected to the testing mechanism. The present invention uses the stable moving mechanism to limit and fix multiple positions of the wheelchair frame in multiple directions and then reciprocate. While moving back and forth, the impact block position of the testing mechanism is driven to move in a circular motion and in a linear reciprocating motion. Through the multi-directional synchronous motion, multiple different positions of the wheelchair frame are subjected to impact tests in sequence, thereby improving comprehensiveness and accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchair manufacturing, and in particular to a wheelchair frame pressure resistance detection device and detection method. Background Art

[0002] The wheelchair frame is the core component of a wheelchair. Its design and performance directly affect the safety, comfort and durability of the wheelchair. Wheelchair frames are widely used in medical, daily life and sports fields. In order to ensure the safety and comfort of wheelchairs when in use, wheelchair frames must undergo compressive strength testing during production. The compressive strength test is used to evaluate the load-bearing capacity and structural integrity of the wheelchair frame when in use.

[0003] Common pressure resistance testing methods include: static load test, dynamic load test, fatigue test and impact test; most of the existing impact tests are to perform overall impact on the wheelchair frame, and it is impossible to perform sequential impact on multiple different positions of the wheelchair frame, so only the impact test results of the wheelchair frame under uniform force can be obtained. However, during use, the user cannot completely guarantee that the wheelchair frame is uniformly stressed. Therefore, the overall impact test method cannot guarantee the comprehensiveness and accuracy of the evaluation of the wheelchair frame impact test results. Summary of the Invention

[0004] Technical problem to be solved: The present invention provides a wheelchair frame pressure resistance detection device and detection method, which can solve the problems pointed out in the above background technology.

[0005] Technical solution: In order to achieve the above purpose, the present invention adopts the following technical solution: a wheelchair frame pressure resistance detection device, including a frame-shaped base, a stable moving mechanism and a detection mechanism. The frame-shaped base is provided with a stable moving mechanism, and the stable moving mechanism is connected to the detection mechanism.

[0006] The stable moving mechanism includes a fixed component for limiting the wheelchair frame at multiple positions and a sliding component for driving the fixed component to move. The frame base is a U-shaped structure with an upward opening. A sliding groove is horizontally provided on the inner bottom surface of the frame base. The sliding component is arranged in the sliding groove. A force transmission component for transmitting impact force to the wheelchair frame is also provided on the right side of the fixed component on the frame base.

[0007] The detection mechanism includes a transmission assembly, the lower part of which is connected to the sliding assembly, and an impact assembly is provided on the transmission assembly for detecting multiple positions of the wheelchair frame.

[0008] Further, the sliding component includes a threaded rod, which is rotatably installed in the sliding groove of the frame-shaped base. A dual-shaft motor is installed at the right end of the frame-shaped base through a motor base. The left output end of the dual-shaft motor extends into the sliding groove and is connected to the threaded rod. A linkage block is threadedly connected to the threaded rod and is slidably arranged in the sliding groove.

[0009] Further, the fixing component includes a mounting plate, which is slidably arranged inside the frame-shaped base. The middle part of the lower end surface of the mounting plate is connected to the linkage block. A plurality of balls for reducing friction are evenly arranged at the bottom of the mounting plate. A positioning base is fixedly installed on the mounting plate, and the positioning base has a stepped rectangular structure with a higher left side and a lower right side.

[0010] Further, support blocks are symmetrically installed on the front and rear of the higher left section of the positioning base. The support block is a U-shaped structure with an upward-opening cross-section and an inverted V-shaped upper part. A right baffle is fixedly installed on the lower right section of the positioning base, and right abutting blocks are symmetrically installed on the front and rear of the end face of the right baffle close to the support block.

[0011] Further, a left baffle is arranged on the left side of the mounting plate relative to the positioning base. There are symmetrically arranged convex blocks at the lower end of the left baffle. Sliding grooves are formed at the corresponding positions of the upper end face of the mounting plate and the convex blocks of the left baffle, and the convex blocks are slidably arranged in the sliding grooves. A left abutting block corresponding to the right abutting block is installed on the side end face of the left baffle close to the support block. An electric telescopic rod is installed in the middle of the left end of the positioning base, and the telescopic end of the electric telescopic rod is connected to the left baffle.

[0012] Further, the force transmission component includes a limiting plate. Limiting plates are symmetrically installed on the front and rear of the frame-shaped base at the right side position of the positioning base. Vertical grooves are formed on the opposite faces of the limiting plates. A force transmission plate is slidably arranged between the vertical grooves of the two limiting plates. Recovery springs are installed at the bottoms of the vertical grooves, and the upper ends of the recovery springs are jointly connected to the lower end of the force transmission plate. A semi-arc groove is formed at the position of the lower end face of the force transmission plate corresponding to the right abutting block.

[0013] Further, the transmission component includes an L-shaped fixing frame, which is fixedly arranged on the ground. The right output shaft of the dual-shaft motor is rotatably installed on the vertical section of the L-shaped fixing frame. A transmission shaft is rotatably installed at the position above the right output shaft of the dual-shaft motor on the vertical section of the L-shaped fixing frame. A transmission belt is jointly connected to the outer walls of the right output shaft of the dual-shaft motor and the transmission shaft. A stabilizing plate is installed below the horizontal section of the L-shaped fixing frame, and the transmission shaft rotatably penetrates through the stabilizing plate.

[0014] Furthermore, the impact assembly includes a sleeve, a sleeve is rotatably installed below the horizontal section of the L-shaped fixed frame and located at the left side of the transmission shaft, a transmission bevel gear is fixedly installed on the outer wall of the sleeve, and an active bevel gear meshing with the transmission bevel gear is fixedly installed on the outer wall of the transmission shaft close to the sleeve. A disc is installed at the lower end of the sleeve, and fixed frames are evenly installed at the lower end of the disc near the outer wall. A ring frame is provided between the multiple fixed frames, and the inner lower part of the fixed frame is connected to the outer wall of the ring frame. The lower end of the ring frame is provided with a stepped groove which is wider at the top and narrower at the bottom. A sliding block is slidably installed in the stepped groove. A telescopic cylinder is installed at the lower end of the sliding block. An impact block is installed at the telescopic end of the telescopic cylinder. One end of the sliding block close to the outer wall of the ring frame is connected to the stepped groove through an extrusion spring. A through hole is provided on one end face of the stepped groove close to the inner wall of the ring frame. A resistance rod is slidably arranged in the through hole. One end of the resistance rod is installed on the sliding block, and the other end of the resistance rod extends to the middle of the ring frame and is provided with a rolling ball.

[0015] Furthermore, the impact assembly also includes a center rod, a center rod is vertically arranged inside the sleeve, the top of the center rod is fixedly installed below the horizontal section of the L-shaped fixing frame, the lower end of the center rod extends and passes through the bottom of the disc, the lower end of the center rod is connected to a screw, a limiting disc is installed at the lower end of the screw, the outer wall of the screw is threadedly connected to an extrusion column, the lower part of the extrusion column is a frustum structure with a size decreasing from top to bottom, and a driving vertical groove is symmetrically opened on the upper outer wall of the extrusion column, and a linkage rod is installed at a position corresponding to the driving vertical groove on the end face of the fixing frame close to the circular ring frame, and the linkage rod is slidably arranged in the driving vertical groove on the side away from the fixing frame.

[0016] Furthermore, a wheelchair frame pressure resistance testing method is performed in conjunction with a wheelchair frame pressure resistance testing device, comprising the following steps:

[0017] Multi-directional limit fixation: The wheelchair frame to be inspected is placed on the fixing component manually or by machine, and the fixing component sequentially limits and fixes the wheelchair frame in multiple positions in the front, back, left and right directions.

[0018] Reciprocating movement of the frame: The fixed wheelchair frame is driven to move back and forth in the sliding groove by the sliding assembly, so that the wheelchair frame can receive uniform impact testing.

[0019] Flat plate force transmission impact: The downward impact force of the impact component is transmitted to the wheelchair frame through the force transmission component. The wheelchair frame is accurately subjected to impact testing while also improving its stability during impact.

[0020] Multi-position impact: The transmission component causes the sliding component to perform horizontal reciprocating motion while driving the impact component to perform circular rotation and linear reciprocating multi-directional displacement multi-position impact.

[0021] Observe the test results: After the test is completed, observe whether the wheelchair frame is deformed or damaged to determine the test results.

[0022] Beneficial effects:

[0023] 1. The wheelchair frame is fixed in multiple directions at multiple positions through a stable moving mechanism and then moves back and forth. While moving back and forth, the impact block of the detection mechanism is driven to move in a circular motion and in a linear reciprocating motion. Through multi-directional synchronous movement, impact tests are performed on multiple different positions of the wheelchair frame in sequence, thereby improving the comprehensiveness and accuracy of the detection.

[0024] 2. The force transmission component can limit the upper position of the wheelchair frame and transmit the impact force at the same time, so that different positions of the wheelchair frame can be accurately impacted, simulating the test of the wheelchair frame under different force points.

[0025] 3. The sliding assembly cooperates with the transmission assembly to drive the impact block on the impact assembly to move in a circular motion while driving the wheelchair frame to move back and forth. At the same time, it moves back and forth along the radius of the circular frame. Through multi-directional synchronous movement, multiple positions of the wheelchair frame can be impact tested in sequence, thereby improving the comprehensiveness of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 For the present invention Figure 1 A magnified view of .

[0028] Figure 3 It is a structural schematic diagram of the fixing component of the present invention.

[0029] Figure 4 It is a front sectional view of the present invention.

[0030] Figure 5 For the present invention Figure 4 B is an enlarged view of .

[0031] Figure 6 For the present invention Figure 4 CC section view.

[0032] Figure 7 Flowchart of the present invention.

[0033] In the figure: 1. Frame-shaped base; 11. Sliding groove; 2. Stable moving mechanism; 21. Fixing component; 211. Mounting plate; 212. Positioning base; 213. Support block; 214. Right baffle; 215. Right abutting block; 216. Left baffle; 217. Left abutting block; 218. Electric telescopic rod; 22. Sliding component; 221. Threaded rod; 222. Biaxial motor; 223. Linking block; 23. Force transmission component; 231. Limiting plate; 232. Force transmission plate; 233. Recovery spring; 234. Semi-arc groove; 3. Detection mechanism; 31. Transmission component; 311. L-shaped frame; 312. Transmission shaft; 313. Transmission belt; 314. Stable plate; 32. Impact component; 321. Sleeve; 322. Transmission bevel gear; 323. Driving bevel gear; 324. Disc; 325. Fixed frame; 326. Ring frame; 327. Sliding block; 328. Telescopic cylinder; 329. Impact block; 3210. Extrusion spring; 3211. Contact rod; 3212. Rolling bead; 3213. Central rod; 3214. Screw; 3215. Extrusion column; 3216. Linking rod; 3217. Driving vertical groove. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figure 1 , the present invention provides a technical solution: a pressure resistance detection device for a wheelchair frame, including a frame-shaped base 1, a stable moving mechanism 2 and a detection mechanism 3. The stable moving mechanism 2 is arranged on the frame-shaped base 1, and the detection mechanism 3 is connected to the stable moving mechanism 2.

[0036] Please refer to Figure 1 , in this embodiment, the stable moving mechanism 2 includes a fixing component 21 for limiting multiple positions of the wheelchair frame and a sliding component 22 for driving the fixing component 21 to move. The frame-shaped base 1 is a U-shaped structure with an upward opening. A sliding groove 11 is horizontally opened on the inner bottom surface of the frame-shaped base 1. The sliding component 22 is arranged in the sliding groove 11. A force transmission component 23 for transmitting the impact force to the wheelchair frame is further arranged on the frame-shaped base 1 on the right side of the fixing component 21.

[0037] Please refer to Figure 1 , Figure 3 , Figure 4In this embodiment, the sliding assembly 22 includes a threaded rod 221, which is rotatably installed in the sliding groove of the frame base 1. A dual-axis motor 222 is installed at the right end of the frame base 1 through a motor seat. The left output end of the dual-axis motor 222 extends into the sliding groove 11 and is connected to the threaded rod 221. A linkage block 223 is threadedly connected to the threaded rod 221, and the linkage block 223 is slidably set in the sliding groove 11; when working, the dual-axis motor 222 is started, and the dual-axis motor 222 drives the threaded rod 221 to rotate in the sliding groove, and the rotation of the threaded rod 221 drives the linkage block 223 to move, and the movement of the linkage block 223 drives the fixed assembly 21 to move synchronously.

[0038] See also Figure 3 、 Figure 4, in this embodiment, the fixing component 21 includes a mounting plate 211 which is slidably arranged inside the frame-shaped base 1. The middle part of the lower end surface of the mounting plate 211 is connected to the linkage block 223. Ball bearings (not shown in the figure) for reducing friction are evenly arranged at the bottom of the mounting plate 211. A positioning base 212 is fixedly installed on the mounting plate 211, and the positioning base 212 has a stepped rectangular structure with the left side higher than the right side; on the higher left section of the positioning base 212, support clamping blocks 213 are symmetrically installed front and back. The support clamping blocks 213 are in a U-shaped structure with an upward-opening cross-section and an inverted V-shaped upper part. A right baffle 214 is fixedly installed on the lower right section of the positioning base 212, and right abutting blocks 215 are symmetrically installed front and back on one end surface of the right baffle 214 close to the support clamping blocks 213; on the left side of the positioning base 212, the mounting plate 211 is provided with a left baffle 216. There are symmetrically arranged convex blocks at the lower end of the left baffle 216. At the position corresponding to the convex blocks of the left baffle 216 on the upper end surface of the mounting plate 211, a sliding groove is opened, and the convex blocks are slidably arranged in the sliding groove. On one side end surface of the left baffle 216 close to the support clamping blocks 213, a left abutting block 217 corresponding to the right abutting blocks 215 is installed. In the middle of the left end of the positioning base 212, an electric telescopic rod 218 is installed, and the telescopic end of the electric telescopic rod 218 is connected to the left baffle 216; during operation, the wheelchair frame to be detected is placed on the mounting plate 211 manually or by a machine. During the placement process, the middle part of the wheelchair frame enters the support clamping blocks 213 under the guiding action of the upper part of the support clamping blocks 213, limiting the front and back positions of the middle part of the wheelchair frame. With the left-high and right-low structure of the positioning base 212, the legs of the wheelchair frame with different heights on the left and right sides can be supported and placed synchronously, ensuring the stable placement of the wheelchair frame. Then, the wheelchair frame is pushed from left to right, so that the right leg of the wheelchair frame is stuck into the right abutting blocks 215. Subsequently, the electric telescopic rod 218 is started to drive the left baffle 216 and the left abutting block 217 to move to clamp the left leg of the wheelchair frame, achieving the front and back limit fixation of the left and right sides of the wheelchair frame. Moreover, by the movement of the left baffle 216 and the right baffle 214 to clamp the wheelchair frame, the left and right limit fixation of the wheelchair frame is achieved, thus achieving the multi-directional limit fixation of the wheelchair frame and improving the stability during detection.

[0039] Please refer to Figure 1The force transmission assembly 23 includes a limit plate 231. The limit plates 231 are symmetrically mounted on the frame base 1 to the right of the positioning base 212. Vertical slots are defined on opposing sides of the limit plates 231. A force transmission plate 232 slides between the vertical slots of the two limit plates 231. Restoration springs 233 are installed at the bottom of each vertical slot. The upper ends of the return springs 233 are connected to the lower ends of the force transmission plates 232. A semi-arc groove 234 is defined on the lower end of the force transmission plates 232, corresponding to the right stop block 215. During operation, when the sliding assembly 22 drives the wheelchair frame on the fixed assembly 21 to the right, below the force transmission plates 232 between the limit plates 231, the bracket on the wheelchair frame enters the semi-arc groove 234 for position retention. During testing, the impact force impacts the force transmission plates 232, causing them to transmit the impact force to the wheelchair frame. The return springs 233 ensure proper force transmission from the force transmission plates 232.

[0040] See also Figure 1 、 Figure 3 、 Figure 4 、 Figure 5In this embodiment, the detection mechanism 3 includes a transmission assembly 31, the lower part of the transmission assembly 31 is connected to the sliding assembly 22, and the transmission assembly 31 is provided with an impact assembly 32 for detecting multiple positions of the wheelchair frame; the transmission assembly 31 includes an L-shaped frame 311, the L-shaped frame 311 is fixedly set on the ground, and the right output shaft of the dual-axis motor 222 is rotatably installed on the vertical section of the L-shaped frame 311, and the vertical section of the L-shaped frame 311 is located above the dual-axis motor 222 and is rotatably installed with a transmission shaft 312, and the transmission shaft 312 and the outer wall of the right output shaft of the dual-axis motor 222 are commonly connected with a transmission belt 313, and a stabilizing plate 314 is installed below the horizontal section of the L-shaped frame 311, and the transmission shaft 312 is rotatably passed through the stabilizing plate 314; the stability of the transmission shaft 312 is improved by the stabilizing plate 314. The impact assembly 32 includes a sleeve 321. The sleeve 321 is rotatably installed below the horizontal section of the L-shaped frame 311 and located on the left side of the transmission shaft 312. A transmission bevel gear 322 is fixedly sleeved on the outer wall of the sleeve 321. An active bevel gear 323 that meshes with the transmission bevel gear 322 is fixedly sleeved on the outer wall of the transmission shaft 312 close to the sleeve 321. A disk 324 is installed at the lower end of the sleeve 321. Fixed frames 325 are evenly installed at the lower end of the disk 324 near the outer wall. Circular frames 326 are arranged between the multiple fixed frames 325. The inner lower part of the fixed frame 325 is connected to the outer wall of the circular frame 326. A stepped groove that is wider at the top and narrower at the bottom is provided at the lower end of the circular ring frame 326, and a sliding block 327 is slidably installed in the stepped groove. A telescopic cylinder 328 is installed at the lower end of the sliding block 327, and an impact block 329 is installed at the telescopic end of the telescopic cylinder 328. One end of the sliding block 327 close to the outer wall of the circular ring frame 326 is connected to the stepped groove through an extrusion spring 3210. A through hole is provided on one end surface of the stepped groove close to the inner wall of the circular ring frame 326, and a resistance rod 3211 is slidably provided in the through hole. One end of the resistance rod 3211 is installed on the sliding block 327, and the other end of the resistance rod 3211 extends to the middle of the circular ring frame 326 and is provided with a rolling ball 3212. During operation, the dual-axis motor 222 drives the fixed part to move gradually while driving the transmission belt 313 to move, so that the transmission shaft 312 rotates. The rotation of the transmission shaft 312 drives the active bevel gear 323 to rotate, so that the driven bevel gear meshing with it also rotates synchronously, thereby driving the sleeve 321 to rotate. The disc 324, the fixed frame 325, and the circular frame 326 under the sleeve 321 all rotate, so that the telescopic cylinder 328 and the impact block 329 rotate in a circle. It can drive the impact block 329 to rotate in a circle while moving back and forth with the wheelchair frame, and perform a circumferential multi-position impact test.

[0041] See also Figure 2 、 Figure 4 、 Figure 5 、 Figure 6The impact assembly 32 also includes a center rod 3213. A center rod 3213 is vertically arranged inside the sleeve 321. The top of the center rod 3213 is fixedly installed below the horizontal section of the L-shaped frame 311. The lower end of the center rod 3213 extends and passes through the bottom of the disc 324. The lower end of the center rod 3213 is connected to a screw rod 3214. A limiting disc is installed at the lower end of the screw rod 3214. The outer wall of the screw 3214 is threadedly connected to an extrusion column 3215. The lower part of the extrusion column 3215 is a frustum structure with a size that decreases from top to bottom. A driving vertical groove 3217 is symmetrically opened on the upper outer wall of the extrusion column 3215. A linkage rod 3216 is installed at a position corresponding to the driving vertical groove 3217 on the end face of the fixing frame 325 close to the circular frame 326. The linkage rod 3216 slides away from the side of the fixing frame 325. The cam 3216 is connected to the drive shaft 3217 by the linkage rod 3216, and the drive shaft 3217 is connected to the drive shaft 3217. When the cam 3216 is in operation, the fixed frame 325 is rotated and the extrusion column 3215 is driven to rotate synchronously. Since the extrusion column 3215 is threadedly connected to the screw 3214, the screw 3214 is fixed, and the extrusion column 3215 can move up and down while rotating. The frustum structure at the lower part of the extrusion column 3215 can squeeze the interference rod 3211 during the up and down movement, so that the interference rod 3211 slides in the through hole and drives the sliding block 327 to slide in the stepped groove, thereby realizing a multi-position impact test in which the wheelchair frame moves in a circular motion while moving back and forth along its radial direction during the left and right reciprocating movement, and can simulate the bearing capacity under different force conditions.

[0042] In addition, the present invention also provides a wheelchair frame pressure resistance detection method, which is completed in cooperation with a wheelchair frame pressure resistance detection device and includes the following steps:

[0043] Multi-directional limit fixation: The wheelchair frame to be inspected is placed on the mounting plate 211 manually or by machine. During the placement process, the middle part of the wheelchair frame enters the support block 213 under the guidance of the upper part of the support block 213, limiting the front and rear position of the middle part of the wheelchair frame. By the structure of the positioning base 212 with the left higher and the right lower, the left and right legs of the wheelchair frame with different heights can be supported and placed synchronously to ensure that the wheelchair frame is placed stably. Then, the wheelchair frame is pushed from left to right so that the right leg of the wheelchair frame is locked into the right support block 215. Subsequently, the electric telescopic rod 218 is activated to drive the left baffle 216 and the left support block 217 to move and clamp the left leg of the wheelchair frame, thereby realizing front and rear limit fixation of the left and right sides of the wheelchair frame. In addition, the left baffle 216 and the right baffle 214 are moved to clamp the wheelchair frame, thereby realizing left and right limit fixation of the wheelchair frame, thereby realizing multi-directional limit fixation of the wheelchair frame.

[0044] The frame moves back and forth: the dual-axis motor 222 drives the threaded rod 221 to rotate in the sliding groove. The rotation of the threaded rod 221 drives the connecting block 223 to move. The movement of the connecting block 223 drives the fixed component 21 to move synchronously, so that the wheelchair frame can move back and forth to obtain a uniform impact test.

[0045] Flat plate force transmission impact: When the sliding assembly 22 drives the wheelchair frame on the fixed assembly 21 to move to the right to under the force transmission plate 232 between the limit plates 231, the bracket on the top of the wheelchair frame enters the semi-arc groove 234 for limit. During the test, the impact force impacts the force transmission plate 232, so that the force transmission plate 232 transmits the impact force to the wheelchair frame. The normal force transmission of the force transmission plate 232 can be guaranteed by the recovery spring 233, so that the wheelchair frame can be subjected to impact test while also improving the stability of the impact.

[0046] Multi-position impact: The dual-axis motor 222 drives the fixed part to gradually move while driving the transmission belt 313 to move, so that the transmission shaft 312 rotates. The rotation of the transmission shaft 312 drives the active bevel gear 323 to rotate, so that the driven bevel gear meshing with it also rotates synchronously, thereby driving the sleeve 321 to rotate. The disc 324, the fixed frame 325, and the circular frame 326 below the sleeve 321 all rotate, so that the telescopic cylinder 328 and the impact block 329 rotate in a circle, which can drive the impact block 329 to rotate in a circle while the wheelchair frame moves back and forth, and perform a circumferential multi-position impact test; through the linkage rod 3216 and the driving vertical slot 3217 With the cooperation, when the fixing frame 325 rotates, the extrusion column 3215 is driven to rotate synchronously at the same time. Due to the threaded connection between the extrusion column 3215 and the screw 3214, the screw 3214 is fixed, and the extrusion column 3215 can move up and down while rotating. The frustum structure at the lower part of the extrusion column 3215 can squeeze the interference rod 3211 during the up and down movement, so that the interference rod 3211 slides in the through hole and drives the sliding block 327 to slide in the stepped groove, thereby realizing a multi-position impact test in which the wheelchair frame moves in a circular motion while moving back and forth along its radius during the left and right reciprocating movement, and can simulate the bearing capacity under different force conditions.

[0047] Observe the test results: After the test is completed, observe whether the wheelchair frame is deformed or damaged to determine the test results.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations. The phrase "includes an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wheelchair frame pressure resistance testing device, comprising a frame-shaped base, a stable moving mechanism, and a testing mechanism, characterized in that: The frame-shaped base is a U-shaped structure with an upward opening. A stable movement mechanism is provided on the frame-shaped base, and a detection mechanism is connected to the stable movement mechanism; The stable movement mechanism includes a fixing component for limiting the wheelchair frame at multiple positions and a sliding component for driving the fixing component to move. A sliding groove is horizontally opened on the inner bottom surface of the frame-shaped base, and the sliding component is arranged in the sliding groove. A force transmission component for transmitting the impact force to the wheelchair frame is also provided on the frame-shaped base on the right side of the fixing component; The detection mechanism includes a transmission component. The lower part of the transmission component is connected to the sliding component, and an impact component for detecting multiple positions of the wheelchair frame is provided on the transmission component; The impact component includes a sleeve. The sleeve is rotatably installed below the horizontal section of the L-shaped frame on the left side of the transmission shaft. The sleeve is connected to the sliding component through the transmission component; A disc is installed at the lower end of the sleeve. Fixed frames are evenly installed at the lower end of the disc near the outer wall. A circular ring frame is arranged between the multiple fixed frames. A stepped groove with a wider upper part and a narrower lower part is opened at the lower end of the circular ring frame. A sliding block is slidably installed in the stepped groove. An expansion cylinder is installed at the lower end of the sliding block, and an impact block is installed at the expansion end of the expansion cylinder. One end of the sliding block close to the outer wall of the circular ring frame is connected to the inside of the stepped groove through a compression spring. A through hole is opened on one side end face of the stepped groove close to the inner wall of the circular ring frame. A contact rod is slidably arranged in the through hole. One end of the contact rod is installed on the sliding block, and the other end of the contact rod extends to the middle of the circular ring frame and is provided with a rolling bead; The impact component further includes a central rod. The central rod is vertically arranged inside the sleeve. A screw rod is connected to the lower end of the central rod. An extrusion column is threadedly connected to the outer wall of the screw rod. The lower part of the extrusion column is a frustum structure with a decreasing size from top to bottom. Driving vertical grooves are symmetrically opened on the front and rear outer walls of the upper part of the extrusion column. Linking rods are installed at the positions corresponding to the driving vertical grooves on the end face of the fixed frame close to the circular ring frame; 2. A wheelchair frame pressure resistance testing device according to claim 1, characterized in that: The sliding component includes a threaded rod. The threaded rod is rotatably installed in the sliding groove of the frame-shaped base. A double-shaft motor is installed on the right end of the frame-shaped base through a motor seat. The left output end of the double-shaft motor extends into the sliding groove and is connected to the threaded rod. A linkage block is threadedly connected to the threaded rod, and the linkage block is slidably arranged in the sliding groove; 3. The wheelchair frame pressure resistance detection device according to claim 2, characterized in that: The fixing component includes a mounting plate. The mounting plate is slidably arranged inside the frame-shaped base. The middle part of the lower end face of the mounting plate is connected to the linkage block. A plurality of balls for reducing friction are evenly arranged at the bottom of the mounting plate. A positioning base is fixedly installed on the mounting plate. The positioning base is a stepped rectangular structure with a higher left side and a lower right side; 4. The wheelchair frame pressure resistance testing device according to claim 3, characterized in that: Supporting clamping blocks are symmetrically installed on the higher left section of the positioning base. The supporting clamping blocks are U-shaped structures with an upward opening and an inverted eight-shaped upper part. A right baffle is fixedly installed on the lower right section of the positioning base. Right abutting blocks are symmetrically installed on the end face of the right baffle close to the supporting clamping blocks; 5. The wheelchair frame pressure resistance detection device according to claim 4, characterized in that: The mounting plate is located on the left side of the positioning base and is provided with a left baffle, and the lower end of the left baffle has protrusions arranged symmetrically front and back. A sliding groove is provided at a position corresponding to the protrusion of the left baffle on the upper end surface of the mounting plate, and the protrusion is slidably set in the sliding groove. A left support block corresponding to the right support block is installed on the end surface of the left baffle close to the supporting block. An electric telescopic rod is installed in the middle of the left end of the positioning base, and the telescopic end of the electric telescopic rod is connected to the left baffle.

6. The wheelchair frame pressure resistance testing device according to claim 4, characterized in that: The force transmission assembly includes a limit plate. The frame-shaped base is located on the right side of the positioning base and the limit plates are symmetrically installed in the front and back. Vertical grooves are provided on the opposite sides of the limit plates. A force transmission plate is slidingly arranged between the vertical grooves of the two limit plates. Restoration springs are installed at the bottom of the vertical grooves. The upper ends of the restoration springs are connected to the lower ends of the force transmission plates. A semi-arc groove is provided on the lower end surface of the force transmission plate corresponding to the right stop block.

7. The wheelchair frame pressure resistance testing device according to claim 2, characterized in that: The transmission assembly includes an L-shaped frame, which is fixedly arranged on the ground. The right output shaft of the dual-axis motor is rotatably installed on the vertical section of the L-shaped frame. The vertical section of the L-shaped frame is located above the dual-axis motor and is rotatably installed with a transmission shaft. The transmission shaft and the outer wall of the right output shaft of the dual-axis motor are commonly connected with a transmission belt. A stabilizing plate is installed below the horizontal section of the L-shaped frame, and the transmission shaft is rotatably passed through the stabilizing plate.

8. The wheelchair frame pressure resistance testing device according to claim 7, characterized in that: The outer wall of the sleeve is fixed with a transmission bevel gear, and the outer wall of the transmission shaft close to the sleeve is fixed with an active bevel gear meshing with the transmission bevel gear. The lower inner side of the fixed frame is connected to the outer wall of the ring frame.

9. The wheelchair frame pressure resistance testing device according to claim 8, characterized in that: The top of the center rod is fixedly installed below the horizontal section of the L-shaped frame, the lower end of the center rod extends to pass through the bottom of the disc, the lower end of the screw is installed with a limited disc, and the linkage rod is slidably arranged in the driving vertical groove on the side away from the fixed frame.

10. A wheelchair frame pressure resistance testing method, characterized by: The wheelchair frame pressure resistance testing device according to claim 1 is used to complete the process, including the following steps: Multi-directional limit fixation: The wheelchair frame to be tested is placed on the fixing component manually or by machine, and the fixing component sequentially limits and fixes the wheelchair frame in multiple positions in the front, back, left and right directions; Reciprocating movement of the wheelchair frame: The sliding assembly drives the fixed wheelchair frame to move back and forth in the sliding groove, so that the wheelchair frame can receive uniform impact test; Flat plate force transmission impact: The downward impact force of the impact component is transmitted to the wheelchair frame through the force transmission component. The wheelchair frame is accurately subjected to the impact test while also improving its stability during the impact. Multi-position impact: The transmission component makes the sliding component perform horizontal reciprocating motion while driving the impact component to perform multi-directional displacement of circular rotation and linear reciprocating motion; Observe the test results: After the test is completed, observe whether the wheelchair frame is deformed or damaged to determine the test results.

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