Damping structure of wheelchair

Abstract

The damping structure of the wheelchair comprises a bottom plate and a top plate, a plurality of damping assemblies are connected between the bottom plate and the top plate, each damping assembly comprises a round pipe fixedly connected with the bottom plate and a sliding rod fixedly connected with the top plate, and the bottom end of each sliding rod is located in the corresponding round pipe and fixedly connected with a piston. The piston is in sliding connection with the round pipe, a spring is arranged between the lower surface of the piston and the inner bottom wall of the round pipe, the surface of the sliding rod is in sliding connection with an internal thread sleeve with a downward opening, a penetrating hole is formed in the top wall of the internal thread sleeve and is in sliding connection with the surface of the sliding rod, and external threads are arranged on the outer side wall of the top end of the round pipe. According to the damping structure, the bottom plate, the top plate, the damping assembly and the mounting assembly are arranged, the bottom plate and the top plate are fixedly connected with the frame and the cushion of the wheelchair through the bolts respectively, the damping structure directly plays a damping role on a patient sitting on the wheelchair, and the damping structure is more convenient and faster to mount and dismount.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheelchair technical field especially relates to a shock attenuation structure of wheelchair. BACKGROUND

[0002] The wheelchair is a kind of seat device with wheel, for helping the person who moves inconveniently moves.It is generally composed of seat, backrest, footboard, wheel and pushing device, and is suitable for the person who cannot walk due to disease, injury, disability or old age.In order to improve the comfort degree of user using wheelchair, shock attenuation structure will be set on wheelchair at present.

[0003] Through the search, the patent with disclosure number CN214596227U discloses a shock attenuation structure of wheelchair, which can effectively buffer the vibration generated by the rear wheel of the wheelchair, so as to avoid the shaking range of the wheelchair frame being too large to affect the user's body feeling.The patent with disclosure number CN212166024U discloses a shock attenuation front wheel structure of wheelchair, which is installed on the front wheel to realize the shock attenuation effect in moving process.However, the above two kinds of shock attenuation structures are installed on the wheel of wheelchair, and need to be installed independently in sequence, which leads to the trouble of installation.Secondly, the above two kinds of shock attenuation structures do not have damping structure, and the buffering effect is general;if the component is damaged, it is not convenient to disassemble and replace, so further improvement is needed. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the shortcomings in prior art, and provides a shock attenuation structure of wheelchair.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a shock attenuation structure of wheelchair, including bottom plate and top plate, a plurality of shock attenuation components are connected between the bottom plate and the top plate, the shock attenuation component includes the circular tube fixedly connected with the bottom plate and the slide rod fixedly connected with the top plate, the slide rod bottom end is located in the circular tube and is fixedly connected with the piston, the piston is slidably connected with the circular tube, the spring is arranged between the lower surface of the piston and the inner bottom wall of the circular tube, the inner thread sleeve with opening downward is slidably connected on the surface of the slide rod, the through hole is formed in the top wall of the inner thread sleeve, and the through hole is slidably connected with the surface of the slide rod, the outer thread is arranged on the outer side wall of the top end of the circular tube, the inner thread sleeve is rotatably connected with the surface of the outer thread, the mounting plate is fixedly arranged on the bottom end of the circular tube and the top end of the slide rod, and the mounting assembly for fixing the mounting plate is fixedly arranged on the upper surface of the bottom plate and the lower surface of the top plate.

[0006] Further, a plurality of annular grooves are formed in the outer side wall of the piston, and a rubber ring is clamped in each annular groove.

[0007] Further, the outer hexagonal sleeve is arranged on the outer side wall of the inner thread sleeve.

[0008] Furthermore, the piston size is larger than the perforation size.

[0009] Furthermore, the mounting assembly includes an L-shaped plate, which is fixedly connected to a corresponding base plate or top plate. A locking bolt passes through the side of the L-shaped plate away from the corresponding base plate or top plate and is connected by a threaded rotation. Both sides of the mounting plate are snapped into the interior of the L-shaped plate.

[0010] Furthermore, the mounting plate has a locking hole near the locking bolt.

[0011] Furthermore, the bottom plate and top plate have several mounting holes on their sides.

[0012] The beneficial effects of this utility model are:

[0013] 1. In use, this utility model provides a shock-absorbing structure for a wheelchair, comprising a base plate, a top plate, shock-absorbing components, and mounting components. The base plate and top plate are fixedly connected to the wheelchair frame and seat cushion respectively by bolts. This shock-absorbing structure directly provides shock absorption for the patient sitting in the wheelchair, and the installation and disassembly of this shock-absorbing structure are more convenient and quick.

[0014] 2. When in use, this utility model provides a shock-absorbing structure for a wheelchair, which includes a shock-absorbing component. The shock-absorbing component includes a round tube, a slide rod, a piston, a spring, and an internal threaded sleeve. After the internal threaded sleeve is unscrewed from the surface of the round tube, the spring inside the round tube and the rubber ring on the surface of the piston can be quickly disassembled, which is beneficial for subsequent maintenance. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 : Overall perspective view of this utility model;

[0017] Figure 2 : Overall sectional view of this utility model;

[0018] Figure 3 The present utility model Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 The present utility model Figure 2 Enlarged view of section B in the middle.

[0020] The attached figures are labeled as follows:

[0021] 1. Base plate; 2. Top plate; 3. Shock absorption assembly; 31. Round tube; 32. Slide rod; 33. Piston; 331. Annular groove; 34. Rubber ring; 35. Spring; 36. Internal threaded sleeve; 361. Through hole; 37. External hexagonal sleeve; 38. Mounting plate; 381. Locking hole; 4. Mounting assembly; 41. L-shaped plate; 42. Locking bolt; 5. Mounting hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-4 As shown, a shock-absorbing structure for a wheelchair is disclosed, comprising a base plate 1 and a top plate 2. Multiple shock-absorbing components 3 are connected between the base plate 1 and the top plate 2. Each shock-absorbing component 3 includes a circular tube 31 fixedly connected to the base plate 1 and a slide rod 32 fixedly connected to the top plate 2. The bottom end of the slide rod 32 is located inside the circular tube 31 and is fixedly connected to a piston 33. The piston 33 is slidably connected to the circular tube 31. A spring 35 is provided between the lower surface of the piston 33 and the inner bottom wall of the circular tube 31. An internally threaded sleeve 36 with its opening facing downward is slidably connected to the surface of the slide rod 32. A through hole 361 is provided on the top wall of the internally threaded sleeve 36, and the through hole 361 is slidably connected to the surface of the slide rod 32. An external thread is provided on the outer side wall of the top end of the circular tube 31, and the internally threaded sleeve 36 is rotatably connected to the surface of the external thread. Mounting plates 38 are fixed to the bottom end of the circular tube 31 and the top end of the slide rod 32. Mounting components 4 for fixing the mounting plates 38 are fixed to the upper surface of the base plate 1 and the lower surface of the top plate 2.

[0024] The piston 33 has multiple annular grooves 331 on its outer side wall, and each annular groove 331 is fitted with a rubber ring 34, which fits against the inner side wall of the round tube 31.

[0025] The piston 33 can increase the friction of the slide rod 32 when it moves inside the round tube 31, thereby reducing the energy loss of the spring 35's rebound and achieving a better shock absorption effect.

[0026] The outer wall of the internal threaded sleeve 36 is provided with an external hexagonal sleeve 37.

[0027] When it is necessary to screw the internal threaded sleeve 36 onto or off the surface of the round tube 31, a wrench can be used to hold the external hexagonal sleeve 37 on the surface and rotate the external hexagonal sleeve 37 using the wrench.

[0028] The piston 33 is larger than the perforation 361.

[0029] To prevent the piston 33 from disengaging from the round tube 31 when it moves upward along the round tube 31.

[0030] Mounting assembly 4 includes an L-shaped plate 41, which is fixedly connected to the corresponding base plate 1 or top plate 2. A locking bolt 42 passes through the side of the L-shaped plate 41 away from the corresponding base plate 1 or top plate 2 and is connected by a threaded rotation. The mounting plate 38 is snapped into the inside of the L-shaped plate 41 on both sides.

[0031] When installing the round tube 31 or the slide bar 32, first, insert the mounting plate 38 into the L-shaped plate 41 of the corresponding mounting component 4. Then, rotate the locking bolt 42 to press the mounting plate 38, thus fixing the round tube 31 and the slide bar 32 in place. Therefore, each shock absorber component 3 can be disassembled individually, facilitating the replacement of individual shock absorber components 3.

[0032] Mounting plate 38 has a locking hole 381 near the locking bolt 42.

[0033] When mounting plate 38 is secured by mounting component 4, locking bolt 42 can be screwed into locking hole 381, thereby improving the installation stability of mounting plate 38.

[0034] The bottom plate 1 and the top plate 2 have several mounting holes 5 on their sides. This allows screws to be inserted into the mounting holes 5 and then used to fix the bottom plate 1 and the top plate 2 to the frame and the seat respectively.

[0035] Working principle: This shock-absorbing structure is installed between the wheelchair frame and the seat. When the patient sits on the seat and encounters bumps, the piston 33 bounces inside the round tube 31, which, together with the spring 35 for cushioning and the rubber ring 34 on the surface of the piston 33 for kinetic energy dissipation, achieves a shock-absorbing effect. Since the spring 35 and rubber ring 34 are consumable parts, when they need to be replaced, the shock-absorbing assembly 3 can be removed from between the base plate 1 and the top plate 2. The removal method is as follows: loosen the locking bolt 42 used to fix the mounting plate 38 so that the locking bolt 42 no longer presses against the mounting plate 38 and disengages from the locking hole 381, thus removing the shock-absorbing assembly 3 from between the base plate 1 and the top plate 2. Then, rotate the internal threaded sleeve 36 to open the top of the round tube 31, and then pull the piston 33 out of the round tube 31. At this point, the spring 35 can be replaced, and the rubber ring 34 can be removed and replaced from the surface of the piston 33.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A shock-absorbing structure for a wheelchair, characterized in that: Includes a base plate (1) and a top plate (2), with multiple shock-absorbing components (3) connected between the base plate (1) and the top plate (2). Each shock-absorbing component (3) includes a circular tube (31) fixedly connected to the base plate (1) and a slide rod (32) fixedly connected to the top plate (2). The bottom end of the slide rod (32) is located inside the circular tube (31) and is fixedly connected to a piston (33). The piston (33) is slidably connected to the circular tube (31). A spring (35) is provided between the lower surface of the piston (33) and the inner bottom wall of the circular tube (31). The surface of the tube (31) is slidably connected to an internally threaded sleeve (36) with its opening facing downward. The top wall of the internally threaded sleeve (36) is provided with a through hole (361), and the through hole (361) is slidably connected to the surface of the slide rod (32). The outer side wall of the top end of the tube (31) is provided with an external thread. The internally threaded sleeve (36) is rotatably connected to the surface of the external thread. The bottom end of the tube (31) and the top end of the slide rod (32) are both fixed with mounting plates (38). The upper surface of the bottom plate (1) and the lower surface of the top plate (2) are both fixed with mounting components (4) for fixing the mounting plates (38).

2. The shock-absorbing structure for a wheelchair according to claim 1, characterized in that: The piston (33) has multiple annular grooves (331) on its outer side wall, and each annular groove (331) is fitted with a rubber ring (34), which is in contact with the inner side wall of the round tube (31).

3. The shock-absorbing structure for a wheelchair according to claim 1, characterized in that: The outer wall of the internal threaded sleeve (36) is provided with an external hexagonal sleeve (37).

4. The shock-absorbing structure for a wheelchair according to claim 1, characterized in that: The piston (33) is larger than the perforation (361).

5. The shock-absorbing structure for a wheelchair according to claim 1, characterized in that: The mounting assembly (4) includes an L-shaped plate (41), and the L-shaped plate (41) is fixedly connected to the corresponding base plate (1) or top plate (2). The side of the L-shaped plate (41) away from the corresponding base plate (1) or top plate (2) is connected by a locking bolt (42) through a threaded rotation. The two sides of the mounting plate (38) are snapped into the inside of the L-shaped plate (41).

6. The shock-absorbing structure for a wheelchair according to claim 5, characterized in that: The mounting plate (38) has a locking hole (381) near the locking bolt (42).

7. The shock-absorbing structure for a wheelchair according to claim 1, characterized in that: The bottom plate (1) and top plate (2) have several mounting holes (5) on their sides.

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