Main buffer strut
Through the multi-level buffering design of inner and outer tube structures and shock-absorbing oil and nitrogen, the failure problem of existing buffer pillars under instantaneous impact force is solved, the multi-level buffering effect is achieved, and the shock absorption performance is improved.
Patent Information
- Application Number
- CN202422159771.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-09-04
AI Technical Summary
Existing buffer pillars are prone to failure when faced with a large instantaneous impact force and are unable to effectively buffer, resulting in insufficient shock absorption performance.
It adopts an inner and outer cylinder structure, combined with a multi-stage buffering design of shock-absorbing oil and nitrogen. Through the coordination of damping holes and inflation chambers, it achieves a multi-stage buffering effect, including primary buffering and secondary buffering.
It effectively reduces impact force, improves cushioning performance, enhances the adaptability of the main cushioning pillar, and achieves a multi-level cushioning effect.
Smart Images
Figure CN223411339U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of shock absorbers, and more specifically relates to a main buffer support. Background Art
[0002] With the development of society, some emerging means of transportation have also appeared in people's field of vision, such as unmanned aircraft, unmanned combat vehicles, etc. Since these emerging means of transportation are usually used in relatively harsh working environments, there are high requirements for their various performances. Among them, the shock absorption and impact resistance of these emerging means of transportation are one of the more important performances. At present, in order to improve the ability to withstand impact forces during operation, shock absorbers are used. Common shock absorbers include buffer struts, and buffer struts are provided with buffer springs or buffer air cushions. Due to the relatively simple structure, they are prone to failure when facing a large instantaneous impact force and cannot play a good buffering role. Utility Model Content
[0003] The purpose of the utility model is to provide a main buffer pillar, aiming to optimize the buffer performance of the existing buffer pillar and improve the adaptability of the buffer pillar.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a main buffer support, including an outer tube and an inner tube, the outer tube and the inner tube are both provided with an open end and a closed end, the closed end of the outer tube is provided with a first connecting portion, the closed end of the inner tube is provided with a second connecting portion, the open end of the inner tube is connected to a first piston, the first piston is inserted in the inner cavity of the outer tube and is slidably connected to the outer tube, a first oil chamber is provided between the first piston and the closed end of the outer tube, a second piston is slidably connected in the inner cavity of the inner tube, a second oil chamber is provided between the second piston and the first piston, an inflation chamber is provided between the second piston and the closed end of the inner tube, and a damping hole is provided on the first piston to connect the first oil chamber and the second oil chamber.
[0005] In a possible implementation, an anti-slip member is provided at the open end of the outer cylinder, and the anti-slip member is used to limit the movement range of the first piston to prevent the first piston from separating from the outer cylinder.
[0006] In one possible implementation, the circumferential side wall of the first piston fits against the inner cavity side wall of the outer cylinder, the outer diameter of the inner cylinder is smaller than the diameter of the first piston, the anti-slip component is an end cover movably connected to the open end of the outer cylinder, a connecting hole is provided through the middle of the end cover, the inner cylinder is slidably inserted into the connecting hole, and the inner diameter of the connecting hole is smaller than the diameter of the first piston.
[0007] In a possible implementation, a vent hole is provided on a side of the outer cylinder close to the end cover, and the vent hole is connected to the inner cavity of the outer cylinder, so that the inner cavity of the outer cylinder is connected to the atmosphere.
[0008] In a possible implementation, an oil filling hole communicating with the first oil chamber is provided on one side of the closed end of the outer cylinder, and a first sealing plug is movably connected to the oil filling hole.
[0009] In a possible implementation, an inflation hole communicating with the inflation cavity is provided on one side of the closed end of the inner tube, and a second sealing plug is movably connected to the inflation hole.
[0010] In one possible implementation, an adjusting plug rod is provided on the end surface of the second piston close to the first piston, the adjusting plug rod is inserted into the damping hole, and there is a flow gap between the adjusting plug rod and the damping hole. The adjusting plug rod moves relative to the first piston to adjust the size of the flow gap.
[0011] In a possible implementation, a cross-sectional area of the regulating plug rod gradually decreases from one end to the other end of the second piston.
[0012] In a possible implementation, the maximum diameter of the regulating plug rod is smaller than or equal to the diameter of the damping hole.
[0013] In a possible implementation, a seal is provided between the first piston and the outer cylinder, and between the second piston and the inner cylinder.
[0014] The beneficial effect of the main buffer strut provided by the present invention is that, compared with the prior art, when in use, the main buffer strut of the present invention injects a certain amount of shock-absorbing oil into the first oil chamber and the second oil chamber, and fills the inflation chamber with nitrogen. When subjected to a momentary impact of a large external force, the outer cylinder and the inner cylinder are relatively close to each other, causing the first piston to move relative to the outer cylinder toward the closed end of the outer cylinder, squeezing the first oil chamber, causing the shock-absorbing oil in the first oil chamber to flow into the second oil chamber through the damping hole. By damping the shock-absorbing oil, a primary buffer is formed for the impact force, alleviating part of the impact force. After the shock-absorbing oil flows into the second oil chamber, the shock-absorbing oil will push the second piston to move relative to the inner cylinder toward the closed end of the inner cylinder, squeezing the nitrogen in the inflation chamber, and forming a secondary buffer for the impact force by compressing the nitrogen in the inflation chamber, thereby effectively reducing the impact force. The main buffer strut provided by the present invention can perform multi-stage buffering of external impact force, thereby improving the buffering performance and enhancing the adaptability of the main buffer strut. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0016] Figure 1 This is a schematic cross-sectional structural diagram of the main buffer pillar provided in an embodiment of the present utility model.
[0017] Description of reference numerals:
[0018] 1. Outer tube; 11. First oil chamber; 101. First connecting part; 2. Inner tube; 21. Second oil chamber; 22. Inflating chamber; 201. Second connecting part; 3. First piston; 31. Damping hole; 4. Second piston; 41. Adjusting plug rod; 5. End cover; 6. Vent hole; 7. Oil filling hole; 71. First sealing plug; 8. Inflating hole; 81. Second sealing plug; 9. Sealing element. DETAILED DESCRIPTION
[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0020] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.
[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.
[0023] See also Figure 1 The main buffer strut provided by the present invention is now described. The main buffer strut comprises an outer cylinder 1 and an inner cylinder 2, both of which are provided with an open end and a closed end, wherein a first connecting portion 101 is provided on the closed end of the outer cylinder 1, and a second connecting portion 201 is provided on the closed end of the inner cylinder 2. In application, the outer cylinder 1 and the inner cylinder 2 can be connected to a vehicle through the first connecting portion 101 and the second connecting portion 201. A first piston 3 is connected to the open end of the inner cylinder 2, and the first piston 3 is inserted into the inner cavity of the outer cylinder 1. The first piston 3 is slidably connected to the outer cylinder 1. A first oil chamber 11 is provided between the first piston 3 and the closed end of the outer cylinder 1. A second piston 4 is slidably connected in the inner cavity of the inner cylinder 2. A second oil chamber 21 is provided between the second piston 4 and the first piston 3, and an air charging chamber 22 is provided between the second piston 4 and the closed end of the inner cylinder 2. A damping hole 31 is also provided on the first piston 3 to connect the first oil chamber 11 and the second oil chamber 21.
[0024] Compared with the prior art, the main buffer strut provided by the present invention, when in use, a certain amount of shock-absorbing oil is injected into the first oil chamber 11 and the second oil chamber 21, and nitrogen is filled into the inflation chamber 22. When subjected to a momentary impact of a large external force, the outer cylinder 1 and the inner cylinder 2 move relatively close to each other, causing the first piston 3 to move relative to the outer cylinder 1 toward the closed end of the outer cylinder 1, squeezing the first oil chamber 11, and causing the shock-absorbing oil in the first oil chamber 11 to flow into the second oil chamber 21 through the damping hole 31. By damping the shock-absorbing oil, a primary buffer is formed for the impact force, alleviating part of the impact force. After the shock-absorbing oil flows into the second oil chamber 21, the shock-absorbing oil pushes the second piston 4 to move relative to the inner cylinder 2 toward the closed end of the inner cylinder 2, squeezing the nitrogen in the inflation chamber 22. By compressing the nitrogen in the inflation chamber 22, a secondary buffer is formed for the impact force, thereby effectively reducing the impact force. The main buffer strut provided by the present invention can provide multi-level buffering for external impact force, thereby improving the buffering performance and enhancing the adaptability of the main buffer strut.
[0025] In some embodiments, see Figure 1An anti-slip component is provided at the open end of the outer tube 1 , and the anti-slip component is used to limit the movement range of the first piston 3 and prevent the first piston 3 from escaping from the inner cavity of the outer tube 1 . Specifically, the outer diameter of the first piston 3 is equivalent to the diameter of the inner cavity of the outer cylinder 1. In application, the axial side wall of the first piston 3 fits against the inner cavity side wall of the outer cylinder 1. In this embodiment, the outer diameter of the inner cylinder 2 is smaller than the diameter of the first piston 3. The anti-slip component is an end cover 5 arranged at the open end of the outer cylinder 1. The end cover 5 is movably connected to the outer cylinder 1. A communicating hole is passed through the middle of the end cover 5. The inner cylinder 2 is inserted into the inner cavity of the outer cylinder 1 after passing through the communicating hole. In this embodiment, the inner diameter of the communicating hole is smaller than the diameter of the first piston 3, thereby preventing the first piston 3 from escaping from the outer cylinder 1 through the communicating hole. Optionally, the inner diameter of the communicating hole is equivalent to the outer diameter of the inner cylinder 2. When in use, the outer wall of the inner cylinder 2 fits against the inner wall of the communicating hole. A sealing member 9 is provided between the inner cylinder 2 and the communicating hole. In this way, the communicating hole limits the radial freedom of the inner cylinder 2, making its axial movement more stable.
[0026] Further, see Figure 1 A vent hole 6 is provided on one side of the outer tube 1 near the end cap 5. The vent hole 6 connects the inner cavity of the outer tube 1 to the atmosphere. In use, a variable chamber is provided between the first piston 3 and the end cap 5. When the first piston 3 moves, the variable chamber is compressed. If the variable chamber is a sealed chamber, when it is compressed, the air inside cannot be discharged, thereby hindering the movement of the first piston 3. Therefore, the vent hole 6 is required to connect the variable chamber to the atmosphere, thereby preventing the movement of the first piston 3 from being hindered.
[0027] In some embodiments, see Figure 1 An oil filling hole 7 connected to the first oil chamber 11 is provided on one side of the closed end of the outer tube 1, and a first sealing plug 71 is movably connected to the oil filling hole 7. When shock-absorbing oil needs to be injected into the first chamber, the first sealing plug 71 is removed and then injected. After the injection of the shock-absorbing oil is completed, the first sealing plug 71 is installed on the oil filling hole 7 to prevent the shock-absorbing oil from flowing out.
[0028] Similarly, an inflation hole 8 is provided on one side of the closed end of the inner tube 2, communicating with the inflation chamber 22, and a second sealing plug 81 is movably connected to the inflation hole 8. In this embodiment, the second sealing plug 81 can be a one-way inflation valve, through which the air source inflates the inflation chamber 22.
[0029] In some embodiments, see Figure 1An adjusting plug rod 41 is provided on the end surface of the second piston 4 near the first piston 3. The adjusting plug rod 41 is inserted into the damping orifice 31. A flow gap is provided between the adjusting plug rod 41 and the damping orifice 31. In this embodiment, the cross-sectional area of the adjusting plug rod 41 gradually decreases from one end of the second piston 4 to the other end, and the maximum diameter of the adjusting plug rod 41 is less than or equal to the aperture of the damping orifice 31. In use, when the second piston 4 moves relative to the inner cylinder 2, it can drive the adjusting plug rod 41 to move relative to the first piston 3, thereby changing the relative position of the adjusting plug rod 41 and the first piston 3, causing the size of the flow gap to change, and thus causing the damping effect generated when the shock absorber oil flows through the damping orifice 31 to change accordingly. In this embodiment, the closer the distance between the second piston 4 and the first piston 3 is, the smaller the flow gap is, and the stronger the damping effect is.
[0030] In some embodiments, see Figure 1 Seals 9 are provided between the first piston 3 and the outer cylinder 1 , between the second piston 4 and the inner cylinder 2 , and between the end cover 5 and the inner cylinder 2 . In this embodiment, the seals 9 are rubber sealing rings.
[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. Main buffer pillar, characterized in that, The invention comprises an outer cylinder (1) and an inner cylinder (2), wherein the outer cylinder (1) and the inner cylinder (2) are both provided with an open end and a closed end, the closed end of the outer cylinder (1) is provided with a first connecting portion (101), the closed end of the inner cylinder (2) is provided with a second connecting portion (201), the open end of the inner cylinder (2) is connected with a first piston (3), the first piston (3) is inserted into the inner cavity of the outer cylinder (1) and is slidably connected with the outer cylinder (1), a first oil chamber (11) is provided between the first piston (3) and the closed end of the outer cylinder (1), a second piston (4) is slidably connected in the inner cavity of the inner cylinder (2), a second oil chamber (21) is provided between the second piston (4) and the first piston (3), an air charging chamber (22) is provided between the second piston (4) and the closed end of the inner cylinder (2), and a damping hole (31) is provided on the first piston (3) for communicating with the first oil chamber (11) and the second oil chamber (21).
2. The main buffer pillar according to claim 1, characterized in that An anti-slip component is provided at the open end of the outer cylinder (1), and the anti-slip component is used to limit the movement range of the first piston (3) to prevent the first piston (3) from escaping from the outer cylinder (1).
3. The main buffer pillar according to claim 2, characterized in that The circumferential side wall of the first piston (3) is in contact with the inner cavity side wall of the outer cylinder (1); the outer diameter of the inner cylinder (2) is smaller than the diameter of the first piston (3); the anti-slip component is an end cover (5) movably connected to the open end of the outer cylinder (1); a connecting hole is provided in the middle of the end cover (5); the inner cylinder (2) is slidably inserted into the connecting hole; the inner diameter of the connecting hole is smaller than the diameter of the first piston (3).
4. The main buffer pillar according to claim 3, characterized in that A vent hole (6) is provided on one side of the outer cylinder (1) close to the end cover (5), and the vent hole (6) is connected to the inner cavity of the outer cylinder (1), so that the inner cavity of the outer cylinder (1) is connected to the atmosphere.
5. The main buffer pillar according to claim 1, characterized in that An oil filling hole (7) communicating with the first oil chamber (11) is provided on one side of the closed end of the outer cylinder (1), and a first sealing plug (71) is movably connected to the oil filling hole (7).
6. The main buffer pillar according to claim 1, characterized in that An inflation hole (8) communicating with the inflation cavity (22) is provided on one side of the closed end of the inner tube (2), and a second sealing plug (81) is movably connected to the inflation hole (8).
7. The main buffer pillar according to claim 1, characterized in that An adjusting plug rod (41) is provided on the end surface of the second piston (4) close to the first piston (3). The adjusting plug rod (41) is inserted into the damping hole (31). A flow gap is provided between the adjusting plug rod (41) and the damping hole (31). The adjusting plug rod (41) moves relative to the first piston (3) to adjust the size of the flow gap.
8. The main buffer pillar according to claim 7, characterized in that The cross-sectional area of the regulating plug rod (41) gradually decreases from one end of the second piston (4) to the other end.
9. The main buffer pillar according to claim 8, characterized in that The maximum diameter of the regulating plug rod (41) is smaller than or equal to the aperture of the damping hole (31).
10. The main cushioning pillar according to claim 1, wherein: Seals (9) are provided between the first piston (3) and the outer cylinder (1), and between the second piston (4) and the inner cylinder (2).