An electric wheelchair climbing performance test device

Abstract

The present invention discloses a device for testing the climbing performance of an electric wheelchair, comprising a fixed platform and a test slope plate, wherein a first support plate and a second support plate are fixedly installed on the front and back sides of the fixed platform respectively, the test slope plate is hinged to the vertical side of the fixed platform near the top, and a slope adjustment mechanism is provided between the test slope plate and the first support plate and the second support plate; the slope adjustment mechanism comprises a support rod groove, a support shaft, a first screw rod, a second screw rod and a screw rod. By providing the slope adjustment mechanism, it is convenient for personnel to adjust the slope of the test slope plate, so that the climbing performance of the electric wheelchair under different slopes can be tested, thereby improving the test efficiency, and solving the problem that the existing electric wheelchair climbing performance test device adopts multiple connecting rod hinge transmission to achieve slope adjustment, and the hinge is prone to jamming and blocking during the adjustment process, resulting in inaccurate slope adjustment, thereby affecting the accuracy of the electric wheelchair climbing performance test.

Description

Technical Field

[0001] The present invention relates to the technical field of electric wheelchair testing, in particular to a device for testing the climbing performance of an electric wheelchair. Background Art

[0002] As an important device for assisting people with limited mobility, electric wheelchairs must not only perform well on everyday flat roads, but also maintain excellent performance and safety in various slope environments. Therefore, rigorous climbing performance testing of electric wheelchairs is a key step in ensuring their wide applicability and user safety.

[0003] Patent announcement number: CN118533509A, discloses a device for testing the climbing performance of an electric wheelchair. It uses a hydraulic cylinder as the main electrical equipment to drive the adjustable base plate, causing the adjustable base plate to rotate around the axis, thereby achieving the effect of changing the inclination angle of the adjustable base plate. After the adjustable base plate deflects around the axis, the telescopic cylinder at its bottom can drive the support plate to deflect, causing the support plate to change from being flat against the bottom of the adjustable base plate to abutting against the inner bottom surface of the bottom frame, thereby forming a cross posture with the hydraulic cylinder. Through the cross-arranged support plates and hydraulic cylinders, when the hydraulic cylinder may fail, the support plates abutting against the inner bottom surface of the bottom frame can support the adjustable base plate to prevent it from falling or suddenly resetting.

[0004] The above technical solution has the problem that the existing electric wheelchair climbing performance test device adopts multiple connecting rod hinge transmission to achieve slope adjustment. During the adjustment process, the hinge is prone to jamming and blocking, resulting in inaccurate slope adjustment, thereby affecting the accuracy of the electric wheelchair climbing performance test. For this reason, we propose an electric wheelchair climbing performance test device. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides an electric wheelchair climbing performance test device, which solves the problem that the existing electric wheelchair climbing performance test device uses multiple connecting rod hinge transmissions to achieve slope adjustment, and the hinges are prone to jamming and blocking during the adjustment process, resulting in inaccurate slope adjustment, thereby affecting the accuracy of the electric wheelchair climbing performance test.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a device for testing the climbing performance of an electric wheelchair, comprising a fixed platform and a test ramp, wherein a first support plate and a second support plate are fixedly mounted on the front and back of the fixed platform, respectively, the test ramp is hinged to the vertical side of the fixed platform near the top, and a slope adjustment mechanism is provided between the test ramp and the first support plate and the second support plate;

[0007] A support rod groove is provided on the test ramp to support the shaft to achieve limited sliding on the test ramp;

[0008] The support shaft movably passes through the support rod slot, and its two ends are rotatably connected to the two moving blocks through bearing seats, so as to support the test ramp;

[0009] Screw rod 1, fixedly installed at the output end of the motor to transmit the moving block;

[0010] The moving block, with a threaded sleeve arranged on an outer wall of the screw rod, is used to drive the test ramp to rotate through the support shaft;

[0011] The second screw rod is rotatably connected to the inner wall of the movable groove on the second support plate through the bearing seat for driving another movable block;

[0012] The screw rod is threadedly connected to one end of the connecting block, and a limit knob is fixedly installed on one end of the screw rod for squeezing and fixing the connecting block.

[0013] Preferably, the support plate 1 and the support plate 2 are both provided with a movable groove, a movable block is slidably connected in the movable groove, a motor is fixedly installed at the bottom end of the inner wall of the movable groove on the support plate 1, a limited arc groove is provided on the support plate 1 and the support plate 2, and connecting blocks are fixedly installed on the front and back sides of the test ramp, the connecting blocks are slidably connected to the limited arc groove, the outer wall fixed sleeve of the screw rod 1 is provided with a driving wheel, the outer wall fixed sleeve of the screw rod 2 is provided with a driven wheel, and the driving wheel is connected to the driven wheel through a transmission belt;

[0014] Preferably, limiting slides are fixedly installed on both sides of the moving block, and a limiting slide groove 1 is opened on the inner wall of the moving groove. The limiting slide is slidably connected to the limiting slide groove 1. By setting the limiting slide, the moving block can be limited, thereby improving the stability of the moving block when sliding in the moving groove.

[0015] Preferably, a friction replacement mechanism is provided at the top of the test ramp, and the friction replacement mechanism includes a friction plate and a clamping plate. A mounting groove is provided at the top of the test ramp, and a positioning column is fixedly installed at the bottom end of the inner wall of the mounting groove. A positioning hole is provided on the friction plate, and the positioning column movably passes through the positioning hole. A clamping groove is provided on the outer wall of the positioning column, and the clamping plate is clamped in the clamping groove. The clamping plate is slidably connected to the top surface of the friction plate.

[0016] Preferably, a limit slider is fixedly installed at the bottom end of the card plate, and a second limit slide groove is provided at the top of the friction plate. The limit slider is slidably connected to the second limit slide groove, and a limit rod is fixedly installed on the inner wall of the second limit slide groove. The limit rod movably passes through the limit slider, and a spring is surrounded by the outer wall of the limit rod. The spring is fixedly installed between one side of the limit slider and the inner wall of the second limit slide groove. By setting the limit rod, the limit slider and the spring can be limited to ensure the stability of the card plate during sliding and the spring compression.

[0017] Preferably, the number of the positioning posts, positioning holes and card plates are all four, and the positioning posts are adapted to the positioning holes, and the card plates are adapted to the card slots. By setting the card plates, the card plates can be inserted into the card slots, thereby limiting and fixing the friction plates.

[0018] Preferably, the connecting block is adapted to the limiting arc groove, and the supporting shaft is adapted to the supporting rod groove. By setting the connecting block and the limiting arc groove, a certain limiting effect can be exerted on the test ramp, thereby improving the stability of the test ramp during use.

[0019] Preferably, a contraction groove is provided at the top of the fixed platform, and an electric push rod 1 and an electric push rod 2 are fixedly installed at the bottom end of the inner wall of the contraction groove, and a baffle is fixedly installed at the output end of the electric push rod 1 and the electric push rod 2. When the electric wheelchair is tested on the test ramp, the electric push rod 1 and the electric push rod 2 can be started, and the electric push rod 1 and the electric push rod 2 drive the baffle to extend out of the contraction groove, so that the baffle can play a certain blocking and protective role for the electric wheelchair, preventing the electric wheelchair from slipping and rolling down the test ramp, causing harm to the tester, thereby improving safety during the test process.

[0020] Preferably, the baffle is adapted to the contraction groove.

[0021] The present invention provides a device for testing the climbing performance of an electric wheelchair. Compared with the prior art, it has the following advantages:

[0022] (1) The electric wheelchair climbing performance test device can facilitate personnel to adjust the slope of the test ramp by setting a slope adjustment mechanism, so that the climbing performance of the electric wheelchair at different slopes can be tested, thereby improving the test efficiency. It solves the problem that the existing electric wheelchair climbing performance test device uses multiple connecting rod hinge transmissions to achieve slope adjustment, and the hinges are prone to jamming and blocking during the adjustment process, resulting in inaccurate slope adjustment, thereby affecting the accuracy of the electric wheelchair climbing performance test.

[0023] (2) The electric wheelchair climbing performance test device can facilitate personnel to replace friction plates with different friction coefficients by setting a friction replacement mechanism, so that the climbing performance of the electric wheelchair can be tested on the ground with different friction coefficients, thereby improving the comprehensiveness of the test and ensuring the subsequent safety of the electric wheelchair. It has a simple structure and strong practicality.

[0024] (3) The electric wheelchair climbing performance test device, through the cooperation of the contraction groove, the electric push rod 1, the electric push rod 2 and the baffle, enables the baffle to play a certain blocking and protective role for the electric wheelchair, preventing the electric wheelchair from slipping and rolling down the test ramp, causing harm to the tester, thereby improving the safety during the test. It has a simple structure and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a left side cross-sectional structural diagram of the present invention;

[0027] Figure 3 It is a right side cross-sectional structural diagram of the present invention;

[0028] Figure 4 It is a front cross-sectional structural diagram of the present invention;

[0029] Figure 5 For the present invention Figure 2 A magnified structural diagram of the middle part;

[0030] Figure 6 For the present invention Figure 2 Enlarged structural diagram of part B in the middle;

[0031] Figure 7 For the present invention Figure 3 Enlarged structural diagram of the middle C part;

[0032] Figure 8 For the present invention Figure 4 Enlarged structural diagram of part D in the middle.

[0033] In the figure: 1. Fixed platform; 2. Test ramp; 3. Support plate 1; 4. Support plate 2; 5. Slope adjustment mechanism; 6. Friction replacement mechanism; 7. Retraction groove; 8. Electric push rod 1; 9. Electric push rod 2; 10. Baffle; 11. Limiting slide; 12. Limiting slide groove 1; 501. Support rod groove; 502. Support shaft; 503. Moving block; 504. Screw rod 1; 505. Motor; 506. Screw rod 2; 507, driving wheel; 508, driven wheel; 509, connecting block; 510, screw; 511, limit knob; 512, limit arc groove; 513, moving groove; 601, friction plate; 602, mounting groove; 603, positioning column; 604, positioning hole; 605, clamping plate; 606, clamping groove; 607, limit slider; 608, limit slide groove 2; 609, limit rod; 610, spring. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] See also Figures 1-8 , the present invention provides two technical solutions:

[0036] Example 1

[0037] The present invention relates to a device for testing the climbing performance of an electric wheelchair, comprising a fixed platform 1 and a test ramp 2, wherein a support plate 1 3 and a support plate 2 4 are fixedly installed on the front and back sides of the fixed platform 1 respectively, a contraction groove 7 is provided on the top of the fixed platform 1, an electric push rod 1 8 and an electric push rod 2 9 are fixedly installed on the bottom end of the inner wall of the contraction groove 7, and a baffle 10 is fixedly installed on the output end of the electric push rod 1 8 and the electric push rod 2 9. When the electric wheelchair is tested on the test ramp 2, the electric push rod 1 8 and the electric push rod 2 9 can be started, and the electric push rod 1 8 and the electric push rod 2 9 drive the baffle 10 to extend out of the contraction groove 7, so that the baffle 10 can play a certain blocking and protective role for the electric wheelchair, thereby preventing the electric wheelchair from slipping and rolling down the test ramp 2, causing injury to the tester, and improving the safety during the test. The baffle 10 is adapted to the contraction groove 7, the test ramp 2 is hinged to the vertical side of the fixed platform 1 near the top, and a slope adjustment mechanism 5 is provided between the test ramp 2 and the support plate 1 3 and the support plate 2 4;

[0038] The slope adjustment mechanism 5 includes a support rod groove 501, a support shaft 502, a screw rod 1 504, a screw rod 2 506 and a screw rod 510. A movable groove 513 is provided on the support plate 1 3 and the support plate 2 4. A movable block 503 is slidably connected in the movable groove 513. A limiting slide 11 is fixedly installed on both sides of the movable block 503. A limiting slide 12 is provided on the inner wall of the movable groove 513. The limiting slide 11 is slidably connected to the limiting slide 12. By setting the limiting slide 11, the movable block 503 can be limited, thereby improving the stability of the movable block 503 when sliding in the movable groove 513. The bottom end of the inner wall of the movable groove 513 on the support plate 1 is fixedly installed with a motor 5 05, a limiting arc groove 512 is provided on both the support plate 1 3 and the support plate 2 4, and a connecting block 509 is fixedly installed on the front and back of the test ramp 2, and the connecting block 509 is slidably connected to the limiting arc groove 512. The connecting block 509 is adapted to the limiting arc groove 512, and the support shaft 502 is adapted to the support rod groove 501. By setting the connecting block 509 and the limiting arc groove 512, a certain limiting effect can be played on the test ramp 2, thereby improving the stability of the test ramp 2 when in use. The outer wall fixing sleeve of the screw rod 1 504 is provided with a driving wheel 507, and the outer wall fixing sleeve of the screw rod 2 506 is provided with a driven wheel 508, and the driving wheel 507 is connected to the driven wheel 508 through a transmission belt;

[0039] The support rod groove 501 is provided on the test ramp 2 and is used to support the shaft 502 to achieve limited sliding on the test ramp 2;

[0040] The support shaft 502 movably passes through the support rod slot 501 , and its two ends are rotatably connected to the two moving blocks 503 through bearing seats, respectively, for supporting the test ramp 2;

[0041] Screw rod 1 504 is fixedly mounted on the output end of motor 505 and is used to transmit the movement block 503;

[0042] The moving block 503 is threadedly sleeved on the outer wall of the screw rod 504 and is used to drive the test ramp 2 to rotate through the support shaft 502;

[0043] The second screw rod 506 is rotatably connected to the inner wall of the movable groove 513 on the second support plate 4 through the bearing seat for driving another movable block 503;

[0044] The screw rod 510 is threadedly connected to one end of the connecting block 509 , and a limit knob 511 is fixedly installed on one end of the screw rod 510 for squeezing and fixing the connecting block 509 .

[0045] When the slope of the test slope 2 needs to be adjusted, the limit knob 511 is first turned to make the limit knob 511 drive the screw 510 to rotate, so that the screw 510 drives the limit knob 511 to no longer squeeze the support plate, and then the motor 505 can be started at this time, and the motor 505 drives the screw rod 1 504 to rotate, and the screw rod 1 504 drives the driving wheel 507 to rotate, and the driving wheel 507 drives the driven wheel 508 to rotate through the transmission belt, and the driven wheel 508 drives the screw rod 2 506 to rotate, and the screw rod 1 504 and the screw rod 2 506 respectively drive the moving block 503 thereon to move upward, and the moving block 503 drives the support shaft 502 to move upward, and the support shaft 502 drives the test slope 2 to rotate upward by sliding upward in the support rod groove 501, thereby increasing the slope of the test slope 2. When the motor 505 is started in reverse, the support The shaft 502 drives the test ramp 2 to rotate downward by sliding downward in the support rod groove 501, thereby reducing the slope of the test ramp 2. When the slope position of the test ramp 2 is determined, the limit knob 511 can be rotated in the opposite direction to make the limit knob 511 drive the screw 510 to rotate, so that the screw 510 drives the limit knob 511 to squeeze the support plate, thereby completing the fixation of the slope of the test ramp 2. Through the above structure, it is convenient for personnel to adjust the slope of the test ramp 2, so that the climbing performance of the electric wheelchair under different slopes can be tested, thereby improving the test efficiency, and solving the problem that the existing electric wheelchair climbing performance test device adopts multiple connecting rod hinge transmissions to achieve slope adjustment, and the hinge is prone to jamming and jamming during the adjustment process, resulting in inaccurate slope adjustment, thereby affecting the accuracy of the electric wheelchair climbing performance test.

[0046] Example 2

[0047] The technical solution of this embodiment is different from that of the first embodiment in that: a friction replacement mechanism 6 is provided at the top of the test ramp 2, and the friction replacement mechanism 6 includes a friction plate 601 and a card plate 605. A mounting groove 602 is provided at the top of the test ramp 2, and a positioning column 603 is fixedly installed at the bottom end of the inner wall of the mounting groove 602. A positioning hole 604 is provided on the friction plate 601, and the positioning column 603 movably passes through the positioning hole 604. A card slot 606 is provided on the outer wall of the positioning column 603, and the card plate 605 is clamped in the card slot 606. The number of the positioning columns 603, the positioning holes 604, and the card plates 605 are all four, and the positioning columns 603 are adapted to the positioning holes 604, and the card plates 605 are adapted to the card slot 606. By providing the card plate 605, the card plate 605 can be clamped into the card slot 606. In the middle, the friction plate 601 is limited and fixed, the card plate 605 is slidably connected to the top surface of the friction plate 601, and a limiting slider 607 is fixedly installed on the bottom end of the card plate 605. A limiting slide groove 2 608 is provided on the top of the friction plate 601, and the limiting slider 607 is slidably connected to the limiting slide groove 2 608. A limiting rod 609 is fixedly installed on the inner wall of the limiting slide groove 2 608, and the limiting rod 609 movably passes through the limiting slider 607. A spring 610 is surrounded by the outer wall of the limiting rod 609, and the spring 610 is fixedly installed between one side of the limiting slider 607 and the inner wall of the limiting slide groove 2 608. By setting the limiting rod 609, the limiting slider 607 and the spring 610 can be limited to ensure the stability of the card plate 605 when sliding and the spring 610 is compressed.

[0048] When it is necessary to replace the friction plate 601 with a different friction coefficient, the card plate 605 can be pulled outward, and the card plate 605 drives the limiting slider 607 to squeeze the spring 610, so that the card plate 605 disengages from the locking groove 606, so that the card plate 605 no longer limits the friction plate 601. At this time, the friction plate 601 can be lifted upward to disengage the positioning post 603 from the positioning hole 604, thereby completing the removal of the friction plate 601. Then, the friction plate 601 with a different friction coefficient is replaced, and the positioning post 603 is inserted into the positioning hole 604 again. Then the card plate 605 is released. At this time, the limiting slider 607 will drive the card plate 605 to be locked into the locking groove 606 under the restoring force of the spring 610, thereby completing the installation of the new friction plate 601. Through the above structure, it is convenient for personnel to replace the friction plates 601 with different friction coefficients, so that the climbing performance of the electric wheelchair can be tested on floors with different friction coefficients, thereby improving the comprehensiveness of the test and ensuring the subsequent safety of the electric wheelchair. The structure is simple and practical.

[0049] At the same time, the contents not described in detail in this specification belong to the existing technology well known to those skilled in the art.

[0050] 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 "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0051] 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 device for testing the climbing performance of an electric wheelchair, comprising a fixed platform (1) and a test ramp (2), characterized in that: The front and back sides of the fixed platform (1) are respectively fixedly mounted with a support plate 1 (3) and a support plate 2 (4); the test slope (2) is hinged to the vertical side of the fixed platform (1) near the top end; a slope adjustment mechanism (5) is provided between the test slope (2) and the support plate 1 (3) and the support plate 2 (4); The slope adjustment mechanism (5) comprises: A support rod groove (501) is provided on the test ramp (2) and is used to support the shaft (502) to achieve limited sliding on the test ramp (2); A support shaft (502) movably passes through the support rod slot (501), and its two ends are rotatably connected to the two moving blocks (503) through bearing seats, respectively, for supporting the test ramp (2); Screw rod 1 (504), fixedly mounted on the output end of the motor (505) for transmitting the moving block (503); The moving block (503) is threadedly sleeved on an outer wall of the screw (510) and is used to drive the test ramp (2) to rotate via the support shaft (502); The second screw rod (506) is rotatably connected to the inner wall of the movable groove (513) on the second support plate (4) through the bearing seat for transmission of another movable block (503); A screw rod (510) is threadedly connected to one end of the connecting block (509), and a limit knob (511) is fixedly installed on one end of the screw rod (510) for squeezing and fixing the connecting block (509); The support plate 1 (3) and the support plate 2 (4) are both provided with a moving groove (513), a moving block (503) is slidably connected in the moving groove (513), a motor (505) is fixedly installed at the bottom end of the inner wall of the moving groove (513) on the support plate 1 (3), and a limiting arc groove (512) is provided on the support plate 1 (3) and the support plate 2 (4), and a connecting block (509) is fixedly installed on the front and back sides of the test ramp (2), and the connecting block (509) is slidably connected to the limiting arc groove (512), the outer wall fixed sleeve of the screw rod 1 (504) is provided with a driving wheel (507), and the outer wall fixed sleeve of the screw rod 2 (506) is provided with a driven wheel (508), and the driving wheel (507) is connected to the driven wheel (508) through a transmission belt; Limiting slides (11) are fixedly installed on both sides of the moving block (503), and a limiting slide groove (12) is provided on the inner wall of the moving groove (513), and the limiting slides (11) are slidably connected to the limiting slide groove (12).

2. The electric wheelchair climbing performance test device according to claim 1, characterized in that: The top of the test ramp (2) is provided with a friction replacement mechanism (6), the friction replacement mechanism (6) comprising a friction plate (601) and a clamping plate (605), the top of the test ramp (2) is provided with a mounting groove (602), the bottom end of the inner wall of the mounting groove (602) is fixedly provided with a positioning column (603), the friction plate (601) is provided with a positioning hole (604), the positioning column (603) movably passes through the positioning hole (604), the outer wall of the positioning column (603) is provided with a clamping groove (606), the clamping plate (605) is clamped in the clamping groove (606), and the clamping plate (605) is slidably connected to the top surface of the friction plate (601).

3. The electric wheelchair climbing performance test device according to claim 2, characterized in that: A limiting slider (607) is fixedly installed at the bottom end of the clamping plate (605), and a limiting slide groove (608) is provided at the top end of the friction plate (601). The limiting slider (607) is slidably connected to the limiting slide groove (608). A limiting rod (609) is fixedly installed on the inner wall of the limiting slide groove (608). The limiting rod (609) movably passes through the limiting slider (607). A spring (610) is surrounded on the outer wall of the limiting rod (609), and the spring (610) is fixedly installed between one side of the limiting slider (607) and the inner wall of the limiting slide groove (608).

4. The electric wheelchair climbing performance testing device according to claim 2, characterized in that: The number of the positioning posts (603), the positioning holes (604) and the clamping plates (605) is four, and the positioning posts (603) are matched with the positioning holes (604), and the clamping plates (605) are matched with the clamping slots (606).

5. The electric wheelchair climbing performance testing device according to claim 1, characterized in that: The connecting block (509) is matched with the limiting arc groove (512), and the supporting shaft (502) is matched with the supporting rod groove (501).

6. The electric wheelchair climbing performance testing device according to claim 5, characterized in that: A contraction groove (7) is provided at the top of the fixed platform (1), and an electric push rod 1 (8) and an electric push rod 2 (9) are fixedly installed at the bottom end of the inner wall of the contraction groove (7), and a baffle (10) is fixedly installed at the output ends of the electric push rod 1 (8) and the electric push rod 2 (9).

7. The electric wheelchair climbing performance testing device according to claim 6, characterized in that: The baffle (10) is adapted to the contraction groove (7).

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