Wheelchair falling strength performance testing machine

Abstract

The invention relates to the technical field of wheelchair falling testing, in particular to a wheelchair falling strength performance testing machine which comprises a base, a portal frame is fixedly connected to the upper sides of the left side edge and the right side edge of the base together, a wheelchair is placed in the portal frame, and a lifting mechanism used for lifting the wheelchair is arranged on the upper side of the portal frame. The lifting mechanism, the connecting mechanism and the balance weight mechanism are used in cooperation, wheelchair falling performance testing and testing preparation links under different load conditions can be completed, the wheelchair is connected with the lifting mechanism rapidly, the wheelchair is not prone to falling off, the wheelchair is not prone to falling off, and the wheelchair is not prone to falling off. The wheelchair lifting mechanism can effectively improve the connecting work efficiency of the wheelchair and the lifting mechanism, meanwhile, the wheelchair adjusting angle can be electrically controlled, synchronous landing of four wheels is guaranteed, the evaluation accuracy of the overall impact resistance of the wheelchair is effectively guaranteed, and the adjusting time of landing positioning of the four wheels can also be effectively shortened.

Description

Technical Field

[0001] The invention relates to the technical field of wheelchair drop test, and in particular to a wheelchair drop strength performance testing machine. Background Art

[0002] A wheelchair is an assistive mobility device, mainly used to help people with limited mobility move freely in different environments. Wheelchairs need to undergo performance tests before leaving the factory. Drop tests are the most common tests for wheelchairs. Wheelchair drop tests are an important step to ensure the safety and durability of wheelchairs in the event of accidental falls or collisions. Such tests are designed to simulate extreme conditions that may be encountered in actual use, in order to verify the strength of the wheelchair structure, the reliability of key components, and the effectiveness of the safety restraint system.

[0003] A wheelchair drop tester is a device specially designed to test the durability and safety of wheelchairs when they encounter accidental falls or impacts. This type of test machine is usually used to simulate various situations that wheelchairs may encounter in actual use to ensure that they comply with relevant safety standards and regulations.

[0004] Most of the existing wheelchair drop test machines connect the wheelchair to the test machine through iron chains or cloth strips. On the one hand, the use of iron chains or cloth strips requires manual tying, which is time-consuming. On the other hand, in order to ensure the overall evaluation effect of the wheelchair drop test, the four wheels of the wheelchair need to touch the ground at the same time. The use of iron chains or cloth strips requires constant adjustment of the tying position, which takes a long time and is inconvenient to use. At the same time, when performing a weighted drop test on the wheelchair, the test dummy needs to be tied to the wheelchair. On the one hand, the cost of using the test dummy is high, and on the other hand, tying the test dummy also takes a lot of time. Summary of the invention

[0005] Technical problem to be solved: A wheelchair drop strength performance testing machine provided by the present invention can solve the above-mentioned problems.

[0006] Technical solution: In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a wheelchair drop strength performance testing machine, comprising a base, a gantry frame is fixedly connected to the upper sides of the left and right sides of the base, a wheelchair is placed in the gantry frame, a lifting mechanism for lifting the wheelchair is arranged on the upper side of the gantry frame, a connecting mechanism for quickly installing the handlebars and side support frames of the wheelchair to the lifting mechanism is arranged on the lower side of the lifting mechanism, and a counterweight mechanism for counterweighting the wheelchair is arranged between the seat cushion of the wheelchair and the connecting mechanism.

[0007] The lifting mechanism comprises a lifting plate movably arranged on the lower side of the bottom wall of the gantry.

[0008] The connecting mechanism includes an L-shaped frame movably arranged on the lower side of the lifting plate, the horizontal section of the L-shaped frame points to the handle of the wheelchair and is slidably connected to a telescopic arm 1 inside, the vertical section of the L-shaped frame points to the base and is slidably connected to a telescopic arm 2 inside, the telescopic arm 1 and the telescopic arm 2 do not extend beyond the L-shaped frame, and support components are provided on the telescopic arm 1 and the telescopic arm 2. The support component on the telescopic arm 1 is used to lock the handle of the wheelchair, and the support component on the telescopic arm 2 is used to lock the side support frame of the wheelchair. An adjustment component for adjusting the height and connecting the two sets of support components is provided on the lifting plate.

[0009] The counterweight mechanism includes electric push rods symmetrically fixedly connected to the left and right sides of the L-shaped frame, and the output ends of the electric push rods on both sides are fixedly connected downward with a placement box, the interior of the placement box is hollow and the upper parts of the four vertical surfaces are all provided with placement openings, a placement groove is provided in the placement box, and a plurality of arc-shaped limit grooves are equidistantly provided in the placement groove, and a circular counterweight plate is placed in the arc-shaped limit groove, and a locking plate assembly for locking the counterweight plate is provided on the left and right sides of the placement box.

[0010] As a preferred technical solution of the present invention, the lifting mechanism also includes a hydraulic cylinder fixedly connected to the center of the top wall of the gantry, the output end of the hydraulic cylinder downwardly penetrates the top wall of the gantry and is fixedly connected to an electromagnetic disk, a magnet sheet is fixedly connected to the position of the upper side of the lifting plate corresponding to the electromagnetic disk, a number of guide rods are slidably connected to the left and right ends of the lifting plate, and the several guide rods on the same end of the lifting plate are fixedly connected between the top wall of the gantry and the support plate, and the support plate is fixedly connected to the side wall of the gantry.

[0011] As a preferred technical solution of the present invention, a plurality of springs five are arranged between the lifting plate and the supporting plate, and the springs five are sleeved on the guide rods in a one-to-one correspondence.

[0012] As a preferred technical solution of the present invention, the adjustment assembly includes two brackets which are symmetrically fixedly connected to the front and rear sides of the lifting plate, the four brackets respectively correspond to the positions of the two handles of the wheelchair and the left and right side supports, the ends of the brackets are symmetrically fixedly connected with support plates, and a rope winding wheel is rotatably connected between the two support plates of the same bracket through a swivel pin, the swivel pins of the two rope winding wheels on the same side of the lifting plate are integrally fixedly connected to the coupling, one end of the coupling is fixedly connected to a motor, the motor is fixedly connected to a support plate, and a pull rope is wound on the rope winding wheel.

[0013] As a preferred technical solution of the present invention, the support assembly includes a two-way electric push rod which is distributed in the left and right directions and is rotatably connected to telescopic arm one and telescopic arm two respectively. Box bodies are installed at the output ends on both sides of the two-way electric push rod. The interior of the box body is hollow. A telescopic plate two slides through a side of the box body away from the two-way electric push rod. A support plate one is fixedly connected to the outer end of the telescopic plate two. A clamping component for cooperating with the support plate one to clamp the handrail or side support frame of the wheelchair is provided on the outer side of the support plate one. An adjusting component for changing the installation method of the output end of the two-way electric push rod and the box body is provided inside the box body.

[0014] As a preferred technical solution of the present invention, the clamping component includes a telescopic plate 1 that slides through a side of the box body away from the two-way electric push rod, the outer end of the telescopic plate 1 is fixedly connected to a butt plate 2, a section of the telescopic plate 1 between the inside of the box body is fixedly connected to a rack, the rack is meshed with a gear 1, the gear 1 is rotatably connected between the two side walls of the box body through a turn pin, the outer periphery of the gear 1 is also meshed with a rack 2, the rack 2 and the rack 1 are centrally symmetrically distributed about the central axis of the turn pin, the rack 2 is integrally fixedly connected to the two side surfaces close to the box body with limited position convex strips, the inner walls of the box body on both sides close to the rack 2 are provided with limited position sliding grooves corresponding to the limited position convex strips, the limited position convex strips are slidably connected in the limited position sliding grooves, a spring 1 is fixedly connected between the inner wall of the side of the box body away from the two-way electric push rod and the rack 2, and the end of the rack 2 away from the butt plate 2 contacts the output end of the two-way electric push rod.

[0015] As a preferred technical solution of the present invention, the adjusting component includes a triangular block 1 fixedly connected to the inner end of the telescopic plate 2, a spring 2 is arranged between the triangular block 1 and the inner wall of the box body on the side away from the two-way electric push rod, the spring 2 is sleeved on the telescopic plate 2, a sliding rod 1 is fixedly connected to the inner wall of the box body on the side away from the rack 1, a connecting plate is slidably connected to the sliding rod 1, an end of the sliding rod 1 close to the telescopic plate 2 is fixedly connected to the limiting plate, a section of the sliding rod 1 between the limiting plate and the connecting plate is sleeved with a spring 3, and an end of the connecting plate close to the triangular block 1 is fixedly connected It is connected to triangular block 2, triangular block 1 and triangular block 2 are both right-angled triangles and the inclined surfaces of the two are slidingly contacted, the end of the connecting plate away from triangular block 1 is integrally fixedly connected with a U-shaped hoop facing the output end of the two-way electric push rod, the output end of the two-way electric push rod passes through the side wall of the box body and extends to the inside of the box body, the U-shaped hoop is sleeved on a section of the two-way electric push rod output end between the inside of the box body, an annular groove is opened at the position of the U-shaped hoop at the output end of the two-way electric push rod, and an arc frame is fixedly connected to the inner wall of the arc segment of the U-shaped hoop, and the arc frame slides in cooperation with the annular groove.

[0016] As a preferred technical solution of the present invention, a connecting ring is fixedly connected to the outer side of the second support plate, and the ends of the pull ropes are tied to the connecting rings one by one. The two pull ropes on the same coupling shaft lift the left and right ends of the corresponding side support components to the same height.

[0017] As a preferred technical solution of the present invention, the locking plate assembly includes a rotating rod that is rotatably connected to the lower parts of the left and right sides of the placement box through a mounting block, a plurality of bent arms are fixedly connected to the rotating rod, and the upper ends of the plurality of bent arms are commonly fixedly connected to a resist rod, a gear 2 is fixedly connected to the center of the rotating rod, a rack 3 is meshingly connected to the side of the gear 2 away from the placement box, the lower end height of the rack 3 is lower than the bottom height of the placement box, the upper end of the rack 3 is fixedly connected to the movable plate through a short plate, the movable plate is slidably connected to a plurality of sliding rods 2, the upper ends of the plurality of sliding rods 2 are commonly fixedly connected to a fixed plate, the fixed plate is fixedly connected to the side of the placement box, the lower end of the sliding rod 2 is fixedly connected to a limiting block, and a section of the sliding rod 2 between the movable plate and the fixed plate is sleeved with a spring 4.

[0018] As a preferred technical solution of the present invention, the lower end of the rack three is fixedly connected with an elastic block.

[0019] Beneficial effects:

[0020] 1. The connection mechanism adopted by the present invention can utilize the handlebars and side support frame structure of the wheelchair to quickly connect the lifting mechanism with the handlebars and side support frame of the wheelchair through electric control, which can effectively reduce the assembly and disassembly time of the wheelchair and the testing machine, and can quickly position the four wheels of the wheelchair on the ground through adjusting components to ensure the balance of force applied to the wheelchair when it falls.

[0021] 2. The counterweight mechanism used in the present invention is an integrated structure with the connecting mechanism. After the connecting structure is connected to the wheelchair, the overall counterweight mechanism also becomes an integral whole with the wheelchair, and no additional connection work is required, which saves time and effort. At the same time, the added counterweight is also the load of the wheelchair. The method of distributing the counterweight on the wheelchair seat cushion is more in line with the actual center of gravity distribution, further ensuring the accuracy of the test.

[0022] 3. The lifting mechanism, connecting mechanism and counterweight mechanism adopted in the present invention are used in combination to complete the wheelchair drop performance test under different load conditions. In the test preparation stage, the wheelchair and the lifting mechanism are quickly connected, which can effectively improve the working efficiency of the connection between the wheelchair and the lifting mechanism. At the same time, the wheelchair adjustment angle can be electrically controlled to ensure that the four wheels touch the ground synchronously, effectively ensuring the accuracy of the evaluation of the overall impact resistance of the wheelchair, and effectively shortening the adjustment time of the four-wheel landing positioning. Furthermore, the counterweight and the wheelchair can form an integrated structure, which can not only save the use cost of the test dummy, but also ensure the stable installation of the counterweight, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0025] Figure 2 It is a front structural schematic diagram of the present invention.

[0026] Figure 3 It is a schematic diagram of the three-dimensional sectional structure of the present invention without the wheelchair.

[0027] Figure 4 It is a schematic diagram of the three-dimensional connection structure of the lifting mechanism and the adjustment component of the present invention.

[0028] Figure 5 It is a schematic diagram of the three-dimensional connection structure of the counterweight mechanism and the connection structure of the present invention.

[0029] Figure 6 The present invention Figure 5 Schematic diagram of the enlarged structure of area A in the middle.

[0030] Figure 7 It is a schematic diagram of the cross-sectional connection structure inside the box body of the present invention.

[0031] Figure 8 It is a half-section structural schematic diagram of the output end of the bidirectional electric push rod and the U-shaped hoop of the present invention.

[0032] Fig. 9 It is a schematic diagram of a wheelchair style in a specific test of the present invention.

[0033] In the figure: 1, base; 2, gantry; 3, connecting mechanism; 31, adjustment component; 311, rope reel; 312, bracket; 313, coupling; 314, support plate; 315, motor; 316, pull rope; 32, L-shaped frame; 33, telescopic arm 1; 34, telescopic arm 2; 35, support component; 351, two-way electric push rod; 3511, annular groove; 352, box body; 353, plate 1; 3531, telescopic plate 2; 354, clamping component; 3541, plate 2; 3542, telescopic plate 1; 3543, limiting convex strip; 3544, rack 1; 3545, limiting slide groove; 3546, spring 1; 3547, rack 2; 3548, gear 1; 355, adjustment component; 35 51. Spring 2; 3552. Triangle block 1; 3553. Triangle block 2; 3554. Slide bar 1; 3555. Connecting plate; 3556. Spring 3; 3557. U-shaped hoop; 3558. Arc frame; 4. Counterweight mechanism; 41. Placement box; 411. Arc limit groove; 42. Press the electric push rod; 43. Counterweight plate; 44. Lock plate assembly; 441. Push rod; 442. Fixed plate; 443. Slide bar 2; 444. Spring 4; 445. Movable plate; 446. Rotating rod; 447. Bending arm; 448. Gear 2; 449. Rack 3; 5. Lifting mechanism; 51. Hydraulic cylinder; 52. Magnet sheet; 53. Guide rod; 54. Lifting plate; 55. Spring 5; 56. Support plate; 57. Electromagnetic disk. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0035] See also Figure 1 and Fig. 9 A wheelchair drop strength performance testing machine comprises a base 1, a gantry 2 is fixedly connected to the upper sides of the left and right sides of the base 1, a wheelchair is placed in the gantry 2, a lifting mechanism 5 for lifting the wheelchair is arranged on the upper side of the gantry 2, a connecting mechanism 3 for quickly installing the handlebar and the side support frame of the wheelchair to the lifting mechanism 5 is arranged on the lower side of the lifting mechanism 5, and a counterweight mechanism 4 for counterweighting the wheelchair is arranged between the seat cushion of the wheelchair and the connecting mechanism 3.

[0036] See also Figure 1 and Figure 2 The lifting mechanism 5 includes a lifting plate 54 movably arranged on the lower side of the bottom wall of the gantry 2.

[0037] See also Figure 1 and Figure 3 The connecting mechanism 3 includes an L-shaped frame 32 movably arranged on the lower side of the lifting plate 54, the horizontal section of the L-shaped frame 32 points to the handlebar of the wheelchair and is slidably connected to a telescopic arm 1 33 inside the frame, the vertical section of the L-shaped frame 32 points to the base 1 and is slidably connected to a telescopic arm 2 34 inside the frame, the telescopic arm 1 33 and the telescopic arm 2 34 are telescoped without exceeding the L-shaped frame 32, and the telescopic arm 1 33 and the telescopic arm 2 34 are both provided with a support assembly 35, the support assembly 35 on the telescopic arm 1 33 is used to lock the handlebar of the wheelchair, and the support assembly 35 on the telescopic arm 2 34 is used to lock the side support frame of the wheelchair, and the lifting plate 54 is provided with an adjustment assembly 31 for adjusting the height and connecting the two groups of support assemblies 35.

[0038] See also Figure 1 , Figure 3 , Figure 5 and Figure 6 The counterweight mechanism 4 includes a pressing electric push rod 42 symmetrically fixedly connected to the left and right sides of the L-shaped frame 32, and the output ends of the pressing electric push rods 42 on both sides are fixedly connected downward with a placement box 41. The interior of the placement box 41 is hollow and a placement opening is opened on the upper part of the four vertical surfaces. A placement groove is arranged in the placement box 41, and a plurality of arc-shaped limit grooves 411 are equidistantly opened in the placement groove. A circular counterweight plate 43 is placed in the arc-shaped limit groove 411, and a locking plate assembly 44 for locking the counterweight plate 43 is arranged on the left and right sides of the placement box 41.

[0039] During specific operation, the placement box 41 is controlled to contact the wheelchair cushion by pressing the electric push rod 42 to ensure that the placement box 41 is placed stably, and the load of the wheelchair is adjusted by adding or reducing the counterweight plate 43, so as to complete the drop test of the wheelchair under different load conditions.

[0040] See also Figure 1 , Figure 2 and Figure 4 The lifting mechanism 5 also includes a hydraulic cylinder 51 fixedly connected to the center of the top wall of the gantry 2, the output end of the hydraulic cylinder 51 penetrates downwardly through the top wall of the gantry 2 and is fixedly connected to an electromagnetic disk 57, a magnet sheet 52 is fixedly connected to the position of the electromagnetic disk 57 on the upper side of the lifting plate 54, and a plurality of guide rods 53 are slidably connected to the left and right ends of the lifting plate 54, and the plurality of guide rods 53 on the same end of the lifting plate 54 are fixedly connected between the top wall of the gantry 2 and a support plate 56, and the support plate 56 is fixedly connected to the side wall of the gantry 2; a plurality of springs 55 are arranged between the lifting plate 54 and the support plate 56, and the springs 55 are correspondingly sleeved on the guide rods 53 one by one.

[0041] During specific operation, the electromagnetic disk 57 is controlled by the hydraulic cylinder 51 to approach the magnet sheet 52, and the electromagnetic disk 57 is energized to generate magnetic force to adsorb the magnet sheet 52. The electromagnetic disk 57 and the magnet sheet 52 adsorbed together are then controlled by the hydraulic cylinder 51 to drive the lifting plate 54 to rise, and the lifting plate 54 indirectly drives the wheelchair to rise to the falling height. Then, the electromagnetic disk 57 is powered off, the electromagnetic disk 57 and the magnet sheet 52 are separated, and the lifting plate 54 and the wheelchair fall freely, thereby completing the wheelchair falling process, and the spring 55 cushions the descent of the lifting plate 54.

[0042] See also Figure 1 and Figure 3 The adjustment component 31 includes two brackets 312 which are symmetrically fixedly connected to the front and rear sides of the lifting plate 54, respectively. The four brackets 312 correspond to the positions of the two handlebars of the wheelchair and the left and right side supports, respectively. The ends of the brackets 312 are symmetrically fixedly connected with support plates 314. A rope winding wheel 311 is rotatably connected between the two support plates 314 of the same bracket 312 through a rotating pin. The rotating pins of the two rope winding wheels 311 on the same side of the lifting plate 54 are integrally fixedly connected to the coupling 313. One end of the coupling 313 is fixedly connected to a motor 315, which is fixedly connected to a support plate 314. A pull rope 316 is wound around the rope winding wheel 311.

[0043] During specific operation, the coupling shaft 313 is controlled to rotate by the motor 315, and the coupling shaft 313 drives the two rope winding wheels 311 to rotate. The two rope winding wheels 311 wind the pull rope 316 to adjust the height of the support assembly 35. The support assemblies 35 on both sides are adjusted asynchronously. When the wheelchair is lifted, if the heights of the front and rear moving wheels of the wheelchair from the ground are different, the height of the front and rear moving wheels from the ground can be made the same by adjusting the height of the support assembly 35 on one side, ensuring that the four wheels can touch the ground when the wheelchair falls, thereby ensuring the uniformity of the force applied when the wheelchair falls, and ensuring that the impact resistance of the entire system can be accurately evaluated.

[0044] See also Figure 3 and Figure 7 The support assembly 35 includes a two-way electric push rod 351 which is distributed in the left and right directions and is rotatably connected to the telescopic arm 1 33 and the telescopic arm 2 34 respectively. Box bodies 352 are installed on the output ends of both sides of the two-way electric push rod 351. The box body 352 is hollow inside. A telescopic plate 2 3531 slides through the side of the box body 352 away from the two-way electric push rod 351. The outer end of the telescopic plate 2 3531 is fixedly connected to the support plate 1 353. A clamping component 354 is provided on the outer side of the support plate 1 353 for cooperating with it to clamp the handrail or side support frame of the wheelchair. An adjusting component 355 is provided inside the box body 352 for changing the installation method of the output end of the two-way electric push rod 351 and the box body 352.

[0045] See also Figure 7 The clamping component 354 includes a telescopic plate 1 3542 that slides through a side of the box body 352 away from the bidirectional electric push rod 351. The outer end of the telescopic plate 1 3542 is fixedly connected to the second plate 3541. A section of the telescopic plate 1 3542 between the inside of the box body 352 is fixedly connected to a rack. The rack is meshed with a gear 1 3548. The gear 1 3548 is rotatably connected between the two side walls of the box body 352 through a rotating pin. The outer periphery of the gear 1 3548 is also meshed with a rack 2 3547. The rack 2 3547 and the rack 1 3544 are about the center of the rotating pin. The axes are distributed symmetrically around the center, and the two side surfaces of the rack 2 3547 close to the box body 352 are integrally fixedly connected with the limiting convex strips 3543. The inner walls on both sides of the box body 352 close to the rack 2 3547 are provided with limiting slide grooves 3545 corresponding to the limiting convex strips 3543. The limiting convex strips 3543 are slidably connected in the limiting slide grooves 3545. A spring 1 3546 is fixedly connected between the inner wall of the box body 352 on the side away from the two-way electric push rod 351 and the rack 2 3547. The end of the rack 2 3547 away from the abutment plate 2 3541 is in contact with the output end of the two-way electric push rod 351.

[0046] See also Figure 7 and Figure 8The adjusting component 355 includes a triangular block 1 3552 fixedly connected to the inner end of the telescopic plate 2 3531, a spring 2 3551 is arranged between the triangular block 1 3552 and the inner wall of the box body 352 on the side away from the two-way electric push rod 351, the spring 2 3551 is sleeved on the telescopic plate 2 3531, a sliding rod 1 3554 is fixedly connected to the inner wall of the box body 352 on the side away from the rack 1 3544, a connecting plate 3555 is slidably connected to the sliding rod 1 3554, an end of the sliding rod 1 3554 close to the telescopic plate 2 3531 is fixedly connected to the limiting plate, a section of the sliding rod 1 3554 between the limiting plate and the connecting plate 3555 is sleeved with a spring 3556, and an end of the connecting plate 3555 close to the triangular block 1 3552 is fixedly connected to the triangular Block 2 3553, triangular block 1 3552 and triangular block 2 3553 are all right-angled triangles and the inclined surfaces of the two are slidingly contacting each other. The end of the connecting plate 3555 away from the triangular block 1 3552 is integrally fixedly connected with a U-shaped hoop 3557 facing the output end of the two-way electric push rod 351. The output end of the two-way electric push rod 351 passes through the side wall of the box body 352 and extends to the inside of the box body 352. The U-shaped hoop 3557 is sleeved on a section of the output end of the two-way electric push rod 351 between the inside of the box body 352. An annular groove 3511 is provided at the position of the U-shaped hoop 3557 at the output end of the two-way electric push rod 351. The inner wall of the arc segment of the U-shaped hoop 3557 is fixedly connected with an arc frame 3558, and the arc frame 3558 slides with the annular groove 3511.

[0047] During specific operation, the two support components 35 are locked respectively. When the support component 35 at the side support frame position of the wheelchair is used, the support component 35 is first manually pulled to the two side support frames of the wheelchair, and then the side supports on both sides are respectively located between the support plates 1 353 and the support plates 2 3541 at both ends of the support component 35, and then the output ends on both sides of the two-way electric push rod 351 are synchronously extended, and the support plate 1 353 first contacts the side support frame, and the two-way electric push rod 351 is continuously controlled to extend, and the support plate 1 353 will move toward the box body 352, and the support plate 1 353 drives the telescopic plate 2 3531 to control The triangle block 1 3552 pushes the triangle block 2 3553 to move in the direction of the rack 2 3547, and the triangle block 2 3553 drives the connecting plate 3555 to control the U-shaped hoop 3557 to move in the direction of the rack 2 3547 until the arc frame 3558 and the annular groove 3511 are separated, and the output end of the two-way electric push rod 351 loses the limiting effect of the arc frame 3558, while the plate 1 353 and the box body 352 are in a relatively static state, and the output end of the two-way electric push rod 351 continues to extend to push the rack 2 3547 to slide along the limiting groove 3545, and the rack 2 3547 and the gear 1 3511 are connected to the connecting plate 3555. The rack 1 3544 moves in the direction opposite to the moving direction of the output end of the two-way electric push rod 351, thereby driving the telescopic plate 1 3542 to drive the second plate 3541 to move toward the box body 352 through the rack 1 3544, and the wheelchair side support frame is locked by the relative movement of the first plate 353 and the second plate 3541. When the wheelchair side support frame needs to be connected or disassembled, the output end of the two-way electric push rod 351 is controlled to shorten, and the rack 2 3547, under the action of the spring 1 3546, will drive the rack 1 3544 to control the second plate 3541 to move away from the wheelchair side support frame, and the wheelchair side support frame can be completely connected or disassembled. The relaxation of the paired wheelchair side supports continues with the elastic recovery control of spring 1 3546, spring 2 3551 and spring 3556 to reset the abutment plate 1 353, abutment plate 2 3541 and U-shaped hoop 3557. The arc frame 3558 cooperates with the annular groove 3511 to make the output end of the two-way electric push rod 351 and the box body 352 in a locked state. The locking of the wheelchair handle is the same as above, thereby completing the rapid locking and relaxation of the wheelchair handle and the side support. A rotatably connected two-way electric push rod 351 is provided to adjust the appropriate locking angle according to the structure of the wheelchair handle and the side support.

[0048] See also Figure 3 and Figure 7 The outer side of the second support plate 3541 is fixedly connected with a connecting ring, and the ends of the pull ropes 316 are tied to the connecting ring one by one. The two pull ropes 316 on the same coupling shaft 313 lift the left and right ends of the corresponding side support assembly 35 to the same height.

[0049] During specific operation, the pull rope 316 and the connecting ring are pre-connected structures, and the pull rope 316 controls the height of the left and right sides of the wheelchair. The two pull ropes 316 on the same coupling shaft 313 are pre-set to lift the left and right ends of the corresponding side support components 35 to the same height, which can save the work of adjusting the wheelchair in the left and right directions.

[0050] See also Figure 6 The locking plate assembly 44 includes a rotating rod 446 which is rotatably connected to the lower part of the left and right sides of the placement box 41 through a mounting block, and a plurality of bent arms 447 are fixedly connected to the rotating rod 446. The upper ends of the plurality of bent arms 447 are fixedly connected to the supporting rod 441. A gear 2 448 is fixedly connected to the center of the rotating rod 446. A side of the gear 2 448 away from the placement box 41 is meshedly connected to a rack 3 449. The lower end height of the rack 3 449 is lower than the bottom height of the placement box 41. The rack 3 The upper end of 449 is fixedly connected to the movable plate 445 through a short plate, the movable plate 445 is slidably connected to a plurality of slide rods 443, the upper ends of the plurality of slide rods 443 are commonly fixedly connected to a fixed plate 442, the fixed plate 442 is fixedly connected to the side of the placement box 41, the lower end of the slide rod 443 is fixedly connected to a limiting block, and a section of the slide rod 443 between the movable plate 445 and the fixed plate 442 is sleeved with a spring four 444; the lower end of the rack three 449 is fixedly connected to an elastic block.

[0051] During specific operation, when the placement box 41 pre-contacts the wheelchair cushion, the lower end of the rack three 449 contacts the wheelchair cushion first, and the placement box 41 continues to move downward, and the rack three 449 moves up to control the rotation of the gear two 448, and the gear two 448 drives the rotating rod 446 to rotate, and the rotating rod 446 rotates to control the push rod 441 to approach the counterweight plate 43, and the counterweight plate 43 is pressed to ensure the stable placement of the counterweight plate 43, to avoid the wheelchair falling, and the counterweight plate 43 is separated from the placement box 41, to improve the safety of use, and to set the elastic block, on the one hand, it can reduce the rack On the one hand, the spring 444 can destroy the wheelchair cushion by the interference of the spring 449. On the other hand, after the support rod 441 is close to the counterweight plate 43, when the lower end of the rack three 449 is still on the lower side of the placement box 41, the gear two 448 and the rack three 449 are elastically connected and protected. When the counterweight plate 43 needs to be replaced, the placement box 41 is kept away from the wheelchair cushion, and the rack three 449 is controlled to move downward under the elastic recovery action of the spring four 444, so that the rotating rod 446 is reversed through the gear two 448 to make the support rod 441 away from the counterweight plate 43, thereby completing the automatic locking and loosening of the counterweight plate 43.

[0052] When in use: S1: place the wheelchair inside the gantry 2, and then lock the two support assemblies 35 respectively. When using the support assembly 35 at the side support frame position of the wheelchair, manually pull the support assembly 35 to the two side support frame positions of the wheelchair, and then make the side supports on both sides be respectively between the support plate 1 353 and the support plate 2 3541 at both ends of the support assembly 35, then make the output ends on both sides of the two-way electric push rod 351 extend synchronously, the support plate 1 353 contacts the side support frame first, and continue to control the two-way electric push rod 351 to extend, the support plate 1 353 will move toward the box body 352, and the support plate 1 353 will drive the telescopic plate 2 3531 to control the triangle block 1 3552 to push the triangle block 2 3553 to move in the direction of the rack 2 3547, and the triangle block 2 3553 will drive the connecting plate 3555 to control the U-shaped The hoop 3557 moves toward the direction of the second rack 3547 until the arc frame 3558 and the annular groove 3511 are separated, and the output end of the two-way electric push rod 351 will lose the limiting effect of the arc frame 3558, while the abutment plate 1 353 and the box body 352 are in a relatively static state, and the output end of the two-way electric push rod 351 will continue to extend to push the second rack 3547 to slide along the limiting slide groove 3545, and the second rack 3547 and the gear 1 3548 cooperate to make the rack 1 3544 move in the direction opposite to the moving direction of the output end of the two-way electric push rod 351, thereby driving the telescopic plate 1 3542 through the rack 1 3544 to drive the abutment plate 2 3541 to move toward the direction of the box body 352, and the relative movement of the abutment plate 1 353 and the abutment plate 2 3541 is used to lock the wheelchair side support frame, and similarly, the wheelchair handrail is locked.

[0053] S2: Place multiple counterweight plates 43 with the required load capacity for the test into the arc-shaped limit groove 411 of the placement box 41, and then control the placement box 41 to contact the wheelchair cushion by pressing the electric push rod 42. When the placement box 41 pre-contacts the wheelchair cushion, the lower end of the rack three 449 first contacts the wheelchair cushion, and the placement box 41 continues to move downward. The rack three 449 will move up to control the rotation of the gear two 448, and the gear two 448 drives the rotating rod 446 to rotate. The rotating rod 446 rotates to control the push rod 441 to be close to the counterweight plate 43, and the counterweight plate 43 is pressed.

[0054] S3: Control the electromagnetic disk 57 to approach the magnet sheet 52 through the hydraulic cylinder 51, and energize the electromagnetic disk 57 so that it generates magnetic force to adsorb the magnet sheet 52, and then control the electromagnetic disk 57 and the magnet sheet 52 adsorbed together through the hydraulic cylinder 51 to drive the lifting plate 54 to rise, and the lifting plate 54 indirectly drives the wheelchair to rise to a certain height, and observe whether the four wheels of the wheelchair are level. If the heights of the front and rear moving wheels of the wheelchair from the ground are different, adjust the height of the support assembly 35 on one side to make the front and rear moving wheels from the ground the same. During adjustment, control the coupling 313 to rotate through the motor 315, and the coupling 313 drives the two rope winding wheels 311 to rotate, and the two rope winding wheels 311 wind the pull rope 316 to adjust the height of the support assembly 35 on one side until the four wheels of the wheelchair are level.

[0055] S4: lift the wheelchair to the falling height through the lifting assembly, then cut off the power to the electromagnetic disk 57, separate the electromagnetic disk 57 and the magnet sheet 52, and let the lifting plate 54 and the wheelchair fall freely. Repeat S4 until the specified number of falls is completed, and then judge the performance of the wheelchair after falling.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wheelchair drop strength performance testing machine, comprising a base (1), a gantry (2) being fixedly connected to the upper sides of the left and right sides of the base (1), a wheelchair being placed in the gantry (2), and characterized in that: The upper side of the gantry (2) is provided with a lifting mechanism (5) for lifting the wheelchair, the lower side of the lifting mechanism (5) is provided with a connecting mechanism (3) for quickly installing the handlebars and side support frames of the wheelchair onto the lifting mechanism (5), and a counterweight mechanism (4) for counterweighting the wheelchair is provided between the seat cushion of the wheelchair and the connecting mechanism (3); The lifting mechanism (5) comprises a lifting plate (54) movably arranged on the lower side of the bottom wall of the gantry (2); The connection mechanism (3) comprises an L-shaped frame (32) movably arranged at the lower side of the lifting plate (54); a telescopic arm 1 (33) is slidably connected inside the horizontal section of the L-shaped frame (32); a telescopic arm 2 (34) is slidably connected inside the vertical section of the L-shaped frame (32); a supporting assembly (35) is arranged on the telescopic arm 1 (33) and the telescopic arm 2 (34); the supporting assembly (35) on the telescopic arm 1 (33) is used to lock the handrail of the wheelchair; the supporting assembly (35) on the telescopic arm 2 (34) is used to lock the side support frame of the wheelchair; and an adjusting assembly (31) for adjusting the height of the two groups of supporting assemblies (35) and connecting them is arranged on the lifting plate (54); The counterweight mechanism (4) comprises electric push rods (42) symmetrically fixedly connected to the left and right sides of the L-shaped frame (32); the output ends of the electric push rods (42) on both sides are fixedly connected downwardly to a placement box (41); a placement slot is arranged in the placement box (41); a plurality of arc-shaped limit slots (411) are equidistantly arranged in the placement slot; a circular counterweight plate (43) is placed in the arc-shaped limit slot (411); and a locking plate assembly (44) for locking the counterweight plate (43) is arranged on the left and right sides of the placement box (41).

2. A wheelchair drop strength performance testing machine according to claim 1, characterized in that: The lifting mechanism (5) further comprises a hydraulic cylinder (51) fixedly connected to the center of the top wall of the gantry (2); the output end of the hydraulic cylinder (51) penetrates downward through the top wall of the gantry (2) and is fixedly connected to an electromagnetic disk (57); a magnet sheet (52) is fixedly connected to the position of the electromagnetic disk (57) on the upper side of the lifting plate (54); a plurality of guide rods (53) are slidably connected to the left and right ends of the lifting plate (54); the plurality of guide rods (53) on the same end of the lifting plate (54) are fixedly connected between the top wall of the gantry (2) and a support plate (56); and the support plate (56) is fixedly connected to the side wall of the gantry (2).

3. A wheelchair drop strength performance testing machine according to claim 2, characterized in that: A plurality of springs (55) are arranged between the lifting plate (54) and the supporting plate (56), and the springs (55) are sleeved on the guide rods (53) in a one-to-one correspondence.

4. A wheelchair drop strength performance testing machine according to claim 1, characterized in that: The adjustment assembly (31) comprises two brackets (312) respectively and symmetrically fixedly connected to the front and rear sides of the lifting plate (54), the four brackets (312) respectively corresponding to the positions of the two handlebars of the wheelchair and the left and right side supports, the ends of the brackets (312) are symmetrically fixedly connected to the support plates (314), the two support plates (314) of the same bracket (312) are rotatably connected to a rope winding wheel (311) through a rotating pin, the rotating pins of the two rope winding wheels (311) on the same side of the lifting plate (54) are integrally fixedly connected to the coupling shaft (313), one end of the coupling shaft (313) is fixedly connected to a motor (315), the motor (315) is fixedly connected to a support plate (314), and a pull rope (316) is wound on the rope winding wheel (311).

5. A wheelchair drop strength performance testing machine according to claim 1, characterized in that: The support assembly (35) comprises a bidirectional electric push rod (351) which is distributed in the left and right directions and is rotatably connected to the telescopic arm 1 (33) and the telescopic arm 2 (34), respectively; a box body (352) is installed at both output ends of the bidirectional electric push rod (351); the box body (352) is hollow inside; a telescopic plate 2 (3531) is slidably penetrated through a side of the box body (352) away from the bidirectional electric push rod (351); the outer end of the telescopic plate 2 (3531) is fixedly connected to the support plate 1 (353); a clamping component (354) for cooperating with the support plate 1 (353) to clamp the wheelchair handle or side support frame; an adjusting component (355) for changing the installation mode of the output end of the bidirectional electric push rod (351) and the box body (352) is arranged inside the box body (352).

6. A wheelchair drop strength performance testing machine according to claim 5, characterized in that: The clamping component (354) includes a telescopic plate 1 (3542) that slides through a side of the box body (352) away from the bidirectional electric push rod (351); the outer end of the telescopic plate 1 (3542) is fixedly connected to the abutment plate 2 (3541); a section of the telescopic plate 1 (3542) between the inside of the box body (352) is fixedly connected to a rack; the rack is meshed with a gear 1 (3548); the gear 1 (3548) is rotatably connected between the two side walls of the box body (352) through a rotating pin; the outer periphery of the gear 1 (3548) is also meshed with a rack 2 (3547); the rack 2 (3547) and the rack 1 (3544) are axially connected with the central axis of the rotating pin. The two sides of the box body (352) are symmetrically distributed. The two side surfaces of the rack (3547) close to the box body (352) are integrally fixedly connected with the limiting convex strips (3543). The inner walls of the two sides of the box body (352) close to the rack (3547) are provided with limiting sliding grooves (3545) corresponding to the limiting convex strips (3543). The limiting convex strips (3543) are slidably connected in the limiting sliding grooves (3545). A spring (3546) is fixedly connected between the inner wall of the box body (352) on one side away from the bidirectional electric push rod (351) and the rack (3547). One end of the rack (3547) away from the abutment plate (3541) contacts the output end of the bidirectional electric push rod (351).

7. A wheelchair drop strength performance testing machine according to claim 5, characterized in that: The adjusting component (355) comprises a triangular block (3552) fixedly connected to the inner end of the second telescopic plate (3531); a second spring (3551) is arranged between the first triangular block (3552) and the inner wall of the box body (352) away from the bidirectional electric push rod (351); the second spring (3551) is sleeved on the second telescopic plate (3531); a sliding rod (3554) is fixedly connected to the inner wall of the box body (352) away from the first rack (3544); a connecting plate (3555) is slidably connected to the first sliding rod (3554); an end of the sliding rod (3554) close to the second telescopic plate (3531) is fixedly connected to the limiting plate; a section of the sliding rod (3554) between the limiting plate and the connecting plate (3555) is sleeved with a third spring (3556); an end of the connecting plate (3555) close to the first triangular block (3552) is fixedly connected to the third spring (3557); Corner block 2 (3553), triangular block 1 (3552) and triangular block 2 (3553) are all right-angled triangles and the inclined surfaces of the two are in sliding contact. The end of the connecting plate (3555) away from the triangular block 1 (3552) is integrally fixedly connected with a U-shaped hoop (3557) facing the output end of the bidirectional electric push rod (351). The output end of the bidirectional electric push rod (351) passes through the side wall of the box body (352) and extends into the inside of the box body (352). The U-shaped hoop (3557) is sleeved on a section of the output end of the bidirectional electric push rod (351) between the inside of the box body (352). The output end of the bidirectional electric push rod (351) corresponds to the position of the U-shaped hoop (3557) and is provided with an annular groove (3511). The inner wall of the circular arc section of the U-shaped hoop (3557) is fixedly connected with an arc frame (3558), and the arc frame (3558) is slidably matched with the annular groove (3511).

8. A wheelchair drop strength performance testing machine according to claim 6, characterized in that: The outer side of the second support plate (3541) is fixedly connected with a connecting ring, and the ends of the pull ropes (316) are tied to the connecting ring one by one. The two pull ropes (316) on the same coupling shaft (313) lift the left and right ends of the corresponding side support assembly (35) to the same height.

9. A wheelchair drop strength performance testing machine according to claim 1, characterized in that: The locking plate assembly (44) comprises a rotating rod (446) which is rotatably connected to the lower part of the left and right sides of the placement box (41) through a mounting block, a plurality of bent arms (447) are fixedly connected to the rotating rod (446), the upper ends of the plurality of bent arms (447) are fixedly connected to a support rod (441), a gear 2 (448) is fixedly connected to the center of the rotating rod (446), a side of the gear 2 (448) away from the placement box (41) is meshingly connected to a rack 3 (449), and the lower end height of the rack 3 (449) is lower than the placement box (41). The bottom height of the rack three (449) is fixedly connected to the movable plate (445) through a short plate, the movable plate (445) is slidably connected to a plurality of sliding rods (443), the upper ends of the plurality of sliding rods (443) are commonly fixedly connected to a fixed plate (442), the fixed plate (442) is fixedly connected to the side of the placement box (41), the lower end of the sliding rod (443) is fixedly connected to a limited block, and a section of the sliding rod (443) between the movable plate (445) and the fixed plate (442) is sleeved with a spring four (444).

10. A wheelchair drop strength performance testing machine according to claim 9, characterized in that: The lower end of the rack three (449) is fixedly connected with an elastic block.

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