Damping frame of wheelchair
By designing a multi-dimensional shock absorbing structure on the main body of the wheelchair frame, including the articulated mounting plate and front and rear shock absorbers, the problem that the existing wheelchair frame cannot effectively eliminate the bumps and vibration of the four wheels is achieved, and the multi-dimensional shock absorbing effect is improved, and riding comfort is improved.
Patent Information
- Application Number
- CN202421568909.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-03
AI Technical Summary
The existing wheelchair frame cannot effectively eliminate the vibration caused by the bumps of the four wheels during travel, affecting riding comfort.
A frame body including a left side plate, a right side plate, and a front side plate is designed, and a hinged mounting plate is provided on the frame main shaft to form multiple rotation points, combining front and rear shock absorbers and side push links to form a multi-directional shock absorbing structure.
Through the multi-directional shock absorption structure, the vibration caused by the four-wheel bumps during the wheelchair is effectively eliminated, and the comfort of wheelchair riding is improved, bringing an excellent experience to special groups of people.
Smart Images
Figure CN222929944U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a wheelchair, in particular to the frame of a wheelchair. Background Art
[0002] A wheelchair is a means of transportation for people with inconvenient legs. For such special groups, the riding comfort of the wheelchair is beneficial to improving their quality of life. The riding comfort of the wheelchair mainly lies in its shock absorption effect. Whether the frame structure is reliable and whether the shock absorption structure is reasonable and effective both have an important impact on the shock absorption effect of the wheelchair. Content of the Utility Model
[0003] Purpose of the Utility Model: The purpose of the utility model is to provide a frame of a wheelchair with multi-directional shock absorption effect.
[0004] Technical Solution: A shock-absorbing frame of a wheelchair includes a frame main body having a left side plate, a right side plate, and a front side plate. A frame main shaft is horizontally passed through and fixed to the left side plate and the right side plate. A left forearm connected to a left front wheel, its front end is connected to the left side of the front side plate, and its rear end is connected to the left side of the frame main shaft. A left rear wheel main shaft connected to a left rear wheel is fixed to the left side plate behind the frame main shaft. A right forearm connected to a right front wheel, its front end is connected to the right side of the front side plate, and its rear end is connected to the right side of the frame main shaft. A right rear wheel main shaft connected to a right rear wheel is fixed to the right side plate behind the frame main shaft. Between the left side of the frame main shaft and the left rear wheel main shaft, there are provided a first mounting plate and a second mounting plate connected by hinges, forming three rotation points. The front and rear ends of a left rear shock absorber are respectively connected to the first mounting plate and the second mounting plate, forming two rotation points. Between the right side of the frame main shaft and the right rear wheel main shaft, there are also provided a first mounting plate and a second mounting plate connected by hinges, forming three rotation points. The front and rear ends of a right rear shock absorber are respectively connected to the first mounting plate and the second mounting plate, forming two rotation points; between the left forearm and the right forearm, there is provided a front shock absorber. The left end of the front shock absorber is connected to the connection point between the left forearm and the front side plate, forming a rotation point. The right end of the front shock absorber is connected to the connection point between the right forearm and the front side plate, forming a rotation point.
[0005] Further, between the left end of the front shock absorber and the connection point between the left forearm and the front side plate, there is provided an L-shaped side push link. The turning angle of the side push link is connected to the left side of the front side plate, forming a rotation point. The two ends of the side push link are respectively connected to the left end of the front shock absorber and the front end of the left forearm, forming two rotation points; between the right end of the front shock absorber and the connection point between the right forearm and the front side plate, there is also provided an L-shaped side push link. The turning angle of the side push link is connected to the right side of the front side plate, forming a rotation point. The two ends of the side push link are respectively connected to the right end of the front shock absorber and the front end of the right forearm, forming two rotation points.
[0006] Further, at the connection between the side push link and the front end of the left forearm, a U-shaped fixing ring is provided. The open end of the fixing ring is fixed to the side push link to form a closed end. A buffer screw is provided on the front end of the left forearm, and the buffer screw extends into the U-shaped inner hole of the fixing ring. The fixing ring rotates under the support of the buffer screw through the U-shaped inner hole. At the connection between the side push link and the front end of the right forearm, a U-shaped fixing ring is also provided. The open end of the fixing ring is fixed to the side push link to form a closed end. A buffer screw is also provided on the front end of the right forearm, and the buffer screw extends into the U-shaped inner hole of the fixing ring. The fixing ring rotates under the support of the buffer sleeve through the U-shaped inner hole.
[0007] Further, the side push link is a clamping structure composed of two L-shaped push plates. The left end / right end of the front shock absorber, the left side / right side of the front side plate, and the open end of the fixing ring are clamped between the two L-shaped push plates for connection or fixation, and the connection structure is reliable.
[0008] Beneficial effects: The advantages of the present utility model are as follows: By providing three groups of shock absorption structures, namely the left side shock absorption structure, the right side shock absorption structure, and the front side shock absorption structure, on the main body of the wheelchair frame, the vibration caused by the bumps of the four wheels during the wheelchair's movement can be greatly eliminated, with a multi-directional shock absorption effect, improving the comfort of wheelchair riding and bringing an excellent user experience to special groups. Description of the Drawings
[0009] Figure 1 It is a schematic diagram of the main structure of the wheelchair frame;
[0010] Figure 2 It is a schematic diagram of the right side shock absorption structure of the frame;
[0011] Figure 3 For Figure 2 Rear view;
[0012] Figure 4 It is a schematic diagram of the front side shock absorption structure of the frame;
[0013] Figure 5 It is one of the connection schematic diagrams of the front side shock absorption structure;
[0014] Figure 6 It is the second connection schematic diagram of the front side shock absorption structure;
[0015] Figure 7 It is the change state diagram of the front side shock absorption structure when the right front wheel is lifted;
[0016] Figure 8 For Figure 7 Right view;
[0017] Figure 9 For Figure 7 Change state diagram of the shock absorption structure when the right front wheel is lifted. Detailed Implementation Modes
[0018] The present utility model will be further illustrated below in conjunction with the accompanying drawings and specific embodiments.
[0019] A shock-absorbing frame of a wheelchair, as shown in the attached Figure 1 figure, the main body of the frame includes a left side plate 1, a right side plate 2, and a front side plate 3. A frame main shaft 4 is horizontally inserted through and fixed to the left side plate 1 and the right side plate 2, so the frame main shaft 4 does not rotate by itself, and the frame main shaft 4 is parallel to the front side plate 3.
[0020] Three groups of shock-absorbing structures are provided on the main body of the frame, namely a left shock-absorbing structure, a right shock-absorbing structure, and a front shock-absorbing structure.
[0021] Combined with the attached Figure 2 、 3 figure, the right shock-absorbing structure will be described.
[0022] The right shock-absorbing structure is as follows: The rear end of the right forearm 6 is connected to the right side of the frame main shaft 4, specifically to the bushing on the right side of the frame main shaft 4, denoted as connection point A 1 , the rear end of the right forearm 6 can rotate relative to the frame main shaft 4 with connection point A 1 , the right rear wheel main shaft 8 is fixed to the right side plate 2 behind the frame main shaft 4, denoted as connection point B 1 , the right rear wheel main shaft 8 does not rotate by itself, the right rear wheel 81 is connected to the right rear wheel main shaft 8, and a hinged first mounting plate 9 and a second mounting plate 10 are provided between the right side of the frame main shaft 4 and the right rear wheel main shaft 8, and the hinge point forms a rotation point C 1 , the first mounting plate 9 is also connected to the bushing on the right side of the frame main shaft 4 at connection point A 1 to form a rotation point A 1 , the second mounting plate 10 is also connected to the right rear wheel main shaft 8 at connection point B 1 to form a rotation point B 1 , the front and rear ends of the right rear shock absorber 12 are respectively connected to the first mounting plate 9 and the second mounting plate 10 to form rotation points D 1 、E 1 .
[0023] The left shock-absorbing structure is symmetrical to the right shock-absorbing structure.
[0024] The left shock-absorbing structure is as follows: The rear end of the left forearm 5 is connected to the left side of the frame main shaft 4, specifically to the bushing on the left side of the frame main shaft 4, denoted as connection point A 2 , the rear end of the left forearm 5 can rotate relative to the frame main shaft 4 with connection point A 2 , the left rear wheel main shaft 7 is fixed to the left side plate 1 behind the frame main shaft 4, denoted as connection point B 2, the left rear wheel main shaft 7 does not rotate on its own. The left rear wheel 71 is connected to the left rear wheel main shaft 7. There are also a first mounting plate 9 and a second mounting plate 10 which are hinged between the left side of the frame main shaft 4 and the left rear wheel main shaft 7, and the hinge points form a rotation point C 2 , the first mounting plate 9 is also at the connection point A 2 and is connected to the bushing on the left side of the frame main shaft 4 to form a rotation point A 2 , the second mounting plate 10 is also at the connection point B 2 and is connected to the left rear wheel main shaft 7 to form a rotation point B 2 , the front and rear ends of the left rear shock absorber 11 are respectively connected to the first mounting plate 9 and the second mounting plate 10 to form rotation points D 2 and E 2 .
[0025] Combined with the attached Figures 4 - 6 to illustrate the front shock structure.
[0026] The front shock structure is: the right end of the front shock absorber 13 is connected to an L-shaped side push link 14, specifically connected to the upper end of the vertical rod of the side push link 14 to form a rotation point F 1 , the corner of the side push link 14 is connected to the right side of the front side plate 3 to form a rotation point G 1 , the right end of the cross bar of the side push link 14 is fixed to the open end of a U-shaped fixing ring 15. The right end of the cross bar closes the open end to form a closed end. There is a transverse connecting plate 17 on the front end of the right front arm 6. The right end of the transverse connecting plate 17 is fixed to the front end of the right front arm 6. There is a buffer screw 16 on the left end of the transverse connecting plate 17. The buffer screw 16 is provided with a buffer sleeve made of elastic rubber material on the surface of one end of the screw. The rear end of the buffer screw 16 intersects and is fixed to the surface of the transverse connecting plate 17. The front end of the buffer screw 16 extends into the U-shaped inner hole 1501 of the fixing ring 15. The buffer screw 16 is clamped to the U-shaped inner hole 1501 through the buffer sleeve on the front end and does not come off. The buffer screw 16 supports the fixing ring 15. The fixing ring 15 can rotate on the buffer sleeve at the front end of the buffer screw 16 through the U-shaped inner hole 1501 to form a rotation point H 1 , the U-shaped inner hole 1501 also provides a transverse buffer space for the overall rotation of the side push link 14 and the fixing ring 15 relative to the buffer screw 16; the left end of the front shock absorber 13 is also connected to an L-shaped side push link 14, specifically connected to the upper end of the vertical rod of the side push link 14 to form a rotation point F 2 , the corner of the side push link 14 is connected to the left side of the front side plate 3 to form a rotation point G 2, the left end of the crossbar of the side thrust connecting rod 14 is also fixed to the open end of a U-shaped fixing ring 15. The left end of the crossbar closes the open end to form a closed end. A transverse connecting plate 17 is also provided at the front end of the left front arm 5. The left end of the transverse connecting plate 17 is fixed to the front end of the left front arm 5. A buffer screw 16 is also provided at the right end of the transverse connecting plate 17. The buffer screw 16 is provided with a buffer sleeve made of elastic rubber material on the surface of one end of the screw. The rear end of the buffer screw 16 intersects and is fixed to the surface of the transverse connecting plate 17. The front end of the buffer screw 16 extends into the U-shaped inner hole 1501 of the fixing ring 15. The buffer screw 16 is clamped to the U-shaped inner hole 1501 through the buffer sleeve at the front end without detachment. The buffer screw 16 supports the fixing ring 15. The fixing ring 15 can rotate on the buffer sleeve at the front end of the buffer screw 16 through the U-shaped inner hole 1501 to form a rotation point H 2 , the U-shaped inner hole 1501 also provides a lateral buffer space when the side thrust connecting rod 14 and the fixing ring 15 rotate as a whole relative to the buffer screw 16.
[0027] The side thrust connecting rod 14 is arranged with two L-shaped push plates opposite to each other, forming a clamping structure. The left end / right end of the front shock absorber 13, the left side / right side of the front side plate 3, and the open end of the fixing ring 15 are clamped between the two L-shaped push plates for connection or fixation. The L-shaped push plates are integrally formed plates. Figure 5 It is to remove one L-shaped push plate on the front side of the side thrust connecting rod at the right end of the front shock absorber to show the connection structure of the fixing ring.
[0028] The right front wheel 61 is installed and connected below the front end of the right front arm 6, and the left front wheel 51 is installed and connected below the front end of the left front arm 5.
[0029] By attaching Figures 7 - 9 It can be seen that, for example, when the right front wheel travels on a raised road surface and is lifted, the front end of the right front arm is lifted. The rear end of the right front arm rotates upward with the rotation point A 1 to rotate upward to adapt to the upward lift of the front end of the right front arm, that is, by attaching Figure 8 , when the front end of the right front arm is lifted, the buffer screw on the front end of the right front arm is lifted, and the rotation point H 1 is lifted, and the right end of the fixing ring is lifted with the rotation point H 1 as the rotation point. Since the fixing ring and the side thrust connecting rod are a rigidly connected whole, the rotation point G of the fixing ring and the side thrust connecting rod as a whole and the front side plate 1 is a fixed position on the frame body. Then the fixing ring and the side thrust connecting rod as a whole rotate counterclockwise with the rotation point G 1 to adapt. The right end of the front shock absorber is stressed. On the one hand, the front shock absorber can buffer the stress on the right end of the front shock absorber. On the other hand, the front shock absorber will translate to the left. The sequential connection of the left end of the front shock absorber, the fixing ring and the side thrust connecting rod as a whole, and the front end of the left front arm can adapt to follow-up and buffer the transmitted vibration. The vibration can be eliminated before reaching the rotation point H 2 and has no influence on the left front arm and the left front wheel.
[0030] The right shock-absorbing structure is connected through the first mounting plate, the second mounting plate, and the right rear shock absorber and five rotation points A 1 ~E 1 , which can buffer the vibration transmitted by the right rear wheel and has no influence on the left rear wheel. The left shock-absorbing structure is connected through the first mounting plate, the second mounting plate, and the left rear shock absorber and five rotation points A 2 ~E 2 , which can buffer the vibration transmitted by the left rear wheel and has no influence on the right rear wheel.
[0031] By providing three groups of shock-absorbing structures, namely, the left shock-absorbing structure, the right shock-absorbing structure, and the front shock-absorbing structure, on the main body of the wheelchair frame, the present application can greatly eliminate the vibration caused by the bumps of the four wheels during the wheelchair movement, has a multi-directional shock-absorbing effect, improves the comfort of wheelchair riding, and brings an excellent use experience to special groups.
Claims
1. A shock-absorbing frame of a wheelchair, comprising a frame body having a left side plate (1), a right side plate (2), and a front side plate (3); a frame main shaft (4) is transversely arranged through the left side plate (1) and the right side plate (2) and fixed to each other; a left front arm (5) connected to the left front wheel, the front end of which is connected to the left side of the front side plate (3), and the rear end of which is connected to the left side of the frame main shaft (4); a left rear wheel main shaft (7) connected to the left rear wheel is fixed to the left side plate (1) behind the frame main shaft (4); a right front arm (6) connected to the right front wheel, the front end of which is connected to the right side of the front side plate (3), and the rear end of which is connected to the right side of the frame main shaft (4); a right rear wheel main shaft (8) connected to the right rear wheel is fixed to the right side plate (2) behind the frame main shaft (4), characterized in that: A hinged first mounting plate (9) and a second mounting plate (10) are arranged between the left side of the frame main shaft (4) and the left rear wheel main shaft (7) to form three rotation points. The front and rear ends of the left rear shock absorber (11) are respectively connected to the first mounting plate (9) and the second mounting plate (10) to form two rotation points. A hinged first mounting plate (9) and a second mounting plate (10) are also arranged between the right side of the frame main shaft (4) and the right rear wheel main shaft (8) to form three rotation points. The front and rear ends of the right rear shock absorber (12) are respectively connected to the first mounting plate (9) and the second mounting plate (10) to form two rotation points. A front shock absorber (13) is arranged between the left forearm (5) and the right forearm (6). The left end of the front shock absorber (13) is connected to the connection point between the left forearm (5) and the front side plate (3) to form a rotation point. The right end of the front shock absorber (13) is connected to the connection point between the right forearm (6) and the front side plate (3) to form a rotation point.
2. The shock-absorbing frame of the wheelchair according to claim 1, characterized in that: An L-shaped side push link (14) is arranged between the left end of the front shock absorber (13) and the connection point between the left forearm (5) and the front side plate (3); the side push link (14) is connected to the left side of the front side plate (3) at a corner to form a rotation point; the two ends of the side push link (14) are respectively connected to the left end of the front shock absorber (13) and the front end of the left forearm (5) to form two rotation points; an L-shaped side push link (14) is also arranged between the right end of the front shock absorber (13) and the connection point between the right forearm (6) and the front side plate (3); the side push link (14) is connected to the right side of the front side plate (3) at a corner to form a rotation point; the two ends of the side push link (14) are respectively connected to the right end of the front shock absorber (13) and the front end of the right forearm (6) to form two rotation points.
3. The shock-absorbing frame of the wheelchair according to claim 2, characterized in that: A U-shaped fixing ring (15) is provided at the connection between the side push connecting rod (14) and the front end of the left forearm (5). The opening end of the fixing ring (15) is fixed to the side push connecting rod (14) to form a closed end. A buffer screw (16) is provided on the front end of the left forearm (5). The buffer screw (16) extends into the U-shaped inner hole (1501) of the fixing ring (15). The fixing ring (15) rotates through the U-shaped inner hole (1501) under the support of the buffer screw (16); A U-shaped fixing ring (15) is also provided at the connection between the push connecting rod (14) and the front end of the right forearm (6). The open end of the fixing ring (15) is fixed to the side push connecting rod (14) to form a closed end. A buffer screw (16) is also provided on the front end of the right forearm (6). The buffer screw (16) extends into the U-shaped inner hole (1501) of the fixing ring (15). The fixing ring (15) rotates through the U-shaped inner hole (1501) under the support of the buffer screw (16).
4. The shock-absorbing frame of the wheelchair according to claim 1, characterized in that: The side push connecting rod (14) is a clamping structure formed by two L-shaped push plates facing each other.