Anti-grounding damping shock absorber and monocycle with same

Abstract

The utility model discloses an anti-grounding damping shock absorber and a monocycle with the anti-grounding damping shock absorber. The anti-grounding damping shock absorber comprises a cylinder barrel which is an oil cavity with an opening in one end; one end of the piston rod extends into the oil cavity of the cylinder barrel from the opening and is in sliding connection with the cylinder barrel; the piston head is fixed to one end of the piston rod and arranged in the oil cavity in a sliding mode along with the piston rod, and the piston head is provided with a damping oil hole; and the plug piece is assembled at the end, away from the opening, of the oil cavity and is opposite to the damping oil hole, and when the piston head slides to the plug piece, the damping oil hole is plugged by the plug piece. When the piston head slides to the plug piece, the damping oil hole can be plugged by the plug piece, so that the piston head is prevented from further moving towards the bottom of the cylinder barrel, and the grounding prevention function is achieved. The design can ensure that the piston rod is not in contact with the bottom of the cylinder barrel under extreme road conditions or after long-time use, so that the risk of damage of the shock absorber is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelbarrows, in particular to an anti-bottoming damping shock absorber and a wheelbarrow with the same. Background Art

[0002] At present, most unicycle shock absorbers on the market use the damping shock absorption principle, which absorbs and dissipates the impact energy of the wheel through the damping oil or damping material inside the shock absorber, thereby achieving the purpose of shock absorption. However, this traditional shock absorber design is prone to problems such as reduced damping effect and contact between the piston rod and the bottom of the cylinder when dealing with extreme road conditions or long-term use, resulting in damage to the shock absorber, which in turn affects the overall performance and riding safety of the unicycle. Utility Model Content

[0003] In order to overcome at least one defect of the prior art, the utility model provides an anti-bottoming damping shock absorber and a wheelbarrow having the same, which can solve the problem of the piston rod bottoming out and improve the service life and safety of the damping shock absorber.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] An anti-bottoming damping shock absorber comprises: a cylinder, which is an oil chamber with an opening at one end; a piston rod, one end of which extends into the oil chamber of the cylinder from the opening and is slidably connected to the cylinder; a piston head, which is fixed to one end of the piston rod and is slidably arranged in the oil chamber following the piston rod, and the piston head has a damping oil hole; a plug, which is assembled at one end of the oil chamber away from the opening and is opposite to the damping oil hole, and when the piston head slides to the plug, the plug blocks the damping oil hole.

[0006] By adopting the above solution, when the piston head slides to the plug, the plug will block the damping oil hole, thereby preventing the piston head from moving further to the bottom of the cylinder, thus achieving the function of preventing bottoming out. This design can ensure that the piston rod will not touch the bottom of the cylinder under extreme road conditions or after long-term use, thereby avoiding the risk of damage to the shock absorber.

[0007] Furthermore, the plug includes a fixed section and a sealing section, the sealing section is fixedly connected to the fixed section, the sealing section is inserted into the damping oil hole and sealedly connected to the inner wall of the damping oil hole, or the end of the sealing section is sealed and abutted against the end of the damping oil hole.

[0008] Furthermore, the plug includes a fixed section and a blocking section, the blocking section is fixedly connected to the fixed section, the blocking section is conical or frustum-shaped, and the blocking section partially extends into the damping oil hole and is connected to the inner wall of the damping oil hole.

[0009] Furthermore, the blocking section is made of a flexible material, and an interference connection is formed between the blocking section and the damping oil hole.

[0010] By adopting the above scheme, the interference connection means that the size of the sealing section is slightly larger than the damping oil hole, so that a certain pre-tightening force is generated during assembly, so that the sealing section can fit tightly on the damping oil hole, thereby limiting the flow of damping oil in the damping oil hole, and then the piston head can stop sliding, achieving an anti-bottoming effect.

[0011] Furthermore, the blocking section and the fixing section are both columnar, the diameter of the blocking section is not less than the diameter of the damping oil hole, and the diameter of the blocking section is not greater than the diameter of the fixing section.

[0012] By adopting the above solution, it is ensured that when the piston head slides to the plug, the blocking section can completely block the damping oil hole to prevent the damping oil from leaking, and also realize the function of preventing bottoming out. In addition, the diameter of the blocking section is not greater than the diameter of the fixed section. Such a design makes the fixed section more firmly installed and ensures the support strength of the blocking section.

[0013] Furthermore, a bottom cover is provided at one end of the cylinder away from the opening, the bottom cover is sealingly connected to the cylinder, and the bottom cover is fixedly connected to the fixing section.

[0014] By adopting the above solution, the bottom cover is sealed and connected to the cylinder barrel, which greatly enhances the sealing performance of the shock absorber. The concave plug groove provides a stable installation position for the plug.

[0015] Furthermore, the orthographic projection area of ​​the sealing section on the bottom cover is smaller than the orthographic projection area of ​​the fixing section on the bottom cover, the bottom cover is provided with a concave fixing groove, the fixing section is fixed in the fixing groove, and the sealing section at least partially extends out of the fixing groove.

[0016] By adopting the above solution, the fixing section can be embedded in the fixing plug groove, thereby improving the assembly stability of the plug and the bottom cover and reducing the assembly complexity of the plug and the bottom cover.

[0017] Furthermore, the fixed plug groove includes, from the inside to the outside of the groove, a first accommodating portion, the first accommodating portion is used to accommodate the fixed section; a second accommodating portion, the diameter of the second accommodating portion is smaller than that of the first accommodating portion, and a step portion for abutting the fixed section is formed between the second accommodating portion and the first accommodating portion; a third accommodating portion, the closer the third accommodating portion is to the oil chamber, the larger its diameter.

[0018] By adopting the above scheme, during assembly, the third accommodating portion can make it easier to align the plug and slide it into the fixed plug groove, thereby improving the convenience of assembly; when it is interference-connected with the damping oil hole, the third accommodating portion can provide a deformation space for the sealing section of the plug, which is more conducive to achieving a full sealing state of the damping oil hole and preventing leakage of the damping oil.

[0019] Furthermore, the outer side of the bottom cover includes, from one end to the other end, in sequence: an abutting section, which abuts against the other end of the opening of the cylinder; a sealing section, which is provided with a sealing groove, in which a sealing ring is provided for sealing the oil chamber of the cylinder; an assembly section, which is provided with an external thread, and the oil chamber of the cylinder away from the opening is provided with an internal thread corresponding to the external thread.

[0020] By adopting the above scheme, the sealing section effectively prevents the leakage of damping oil from the connection between the cylinder and the bottom cover, ensuring the stability and reliability of the shock absorber during long-term use; the assembly section not only makes the connection between the bottom cover and the cylinder more secure, but also facilitates installation and disassembly, providing convenience for the maintenance and replacement of the shock absorber; the abutment section abuts against the other end of the opening of the cylinder, which can ensure a stable connection between the bottom cover and the cylinder.

[0021] A wheelbarrow comprises a wheel, a frame and an anti-bottoming damping shock absorber, wherein the anti-bottoming damping shock absorber is connected between the wheel and the frame to provide damping shock absorption.

[0022] By adopting the above scheme, the anti-bottoming damping shock absorber ensures the stability and reliability of the wheelbarrow under various road conditions through reasonable structural design. Whether it is high-speed driving or low-speed bumps, it can maintain stable damping performance, avoid the risk of the piston rod bottoming out, and increase the service life of the damping shock absorber.

[0023] In summary, the anti-bottoming damping shock absorber and the unicycle having the same provided by the utility model have the following technical effects:

[0024] 1. Anti-bottoming design enhances safety: The plugging of the damping oil hole prevents the piston head from moving further to the bottom of the cylinder, thereby avoiding direct contact between the piston rod and the bottom of the cylinder. This not only solves the problem of the piston rod bottoming out, but also reduces the risk of damage to the shock absorber caused by bottoming out, and enhances the riding safety of the unicycle.

[0025] 2. Improve the service life of the damping shock absorber: Since the direct contact between the piston rod and the bottom of the cylinder is avoided, the wear caused by friction and impact is reduced, thereby significantly improving the service life of the damping shock absorber.

[0026] 3. Ensure stable damping performance: Whether in high-speed driving or low-speed bumps, the anti-bottoming damping shock absorber can maintain stable damping performance and provide continuous and reliable shock absorption effect for the unicycle.

[0027] 4. Improved the overall performance of the unicycle: Due to the effective effect of the anti-bottoming damping shock absorber, the unicycle can maintain good stability and comfort when dealing with various road conditions, thereby improving the overall performance of the unicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of a partial explosion structure of an embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of a partial explosion structure of an embodiment of the utility model;

[0031] Figure 4 It is a schematic diagram of a partial explosion cross-sectional structure of an embodiment of the utility model;

[0032] Figure 5 This is a schematic diagram of the cross-sectional structure of the bottom cover of an embodiment of the utility model;

[0033] Figure 6 A schematic structural diagram of a wheelbarrow according to an embodiment of the utility model;

[0034] Figure 7 The figure is a schematic diagram of the partial explosion structure of a wheelbarrow according to an embodiment of the utility model.

[0035] Among them, the meanings of the figure numbers are as follows: 1. cylinder barrel; 11. oil chamber; 111. opening; 112. internal thread; 2. piston head; 21. damping oil hole; 3. piston rod; 31. main rod body; 32. damping adjusting rod; 33. inner oil chamber; 4. plug; 41. fixing section; 42. blocking section; 5. bottom cover; 51. plug groove; 511. first accommodating part; 512. second accommodating part; 513. third accommodating part; 52. abutting section; 53. sealing section; 531. sealing groove; 532. sealing ring; 54. assembly section; 541. external thread; 6. rotating part; 61. screw hole; 62. fixing part; 7. wheel; 8. frame; 9. return spring. DETAILED DESCRIPTION

[0036] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0040] Embodiment 1 of the present utility model is referred to Figure 1-Figure 5As shown, an anti-bottoming damping shock absorber is disclosed, including a cylinder 1, a piston rod 3, a piston head 2 and a plug 4. The cylinder 1 is an oil chamber 11 with an opening 111 at one end, and the other end is in a blocked state. The oil chamber 11 contains damping oil. One end of the piston rod 3 extends into the oil chamber 11 of the cylinder 1 from the opening 111 and is slidably connected to the cylinder 1. The piston head 2 is fixed to one end of the piston rod 3 and is slidably arranged in the oil chamber 11 following the piston rod 3. The piston head 2 has a damping oil hole 21. The plug 4 is assembled at one end of the oil chamber 11 away from the opening 111 and opposite to the damping oil hole 21. When the piston head 2 slides to the plug 4, the plug 4 blocks the damping oil hole 21, and the damping oil cannot flow upward from the damping oil hole 21. Therefore, when the piston head 2 slides to the plug 4, the plug 4 will block the damping oil hole 21, and the damping oil cannot flow, resulting in increased resistance of the piston head 2 and the piston rod 3, thereby preventing the piston head 2 from moving further to the bottom of the cylinder 1, and realizing the anti-bottoming function. This design can ensure that the piston rod 3 will not touch the bottom of the cylinder 1 under extreme road conditions or after long-term use, thereby avoiding the risk of damage to the shock absorber.

[0041] In some embodiments, see Figure 4 As shown, the plug 4 includes a fixed section 41 and a blocking section 42, the blocking section 41 is fixedly connected to the fixed section 42, the blocking section 41 is inserted into the damping oil hole 21 and is sealed with the inner wall of the damping oil hole 21, or the end of the blocking section 41 is sealed against the end of the damping oil hole 21; when the blocking section 41 is inserted into the damping oil hole 21 and is sealed with the inner wall of the damping oil hole 21, the blocking section 41 is columnar, and the fixed section 42 can be columnar or other The shape of the fixed section 42 can be partially inserted into the damping oil hole 21 or not. The utility model does not make specific restrictions. It only needs to be able to block the damping oil hole 21. Preferably, in this embodiment 1, the blocking section 41 is cylindrical, and the fixed section 42 is cylindrical with a diameter larger than the blocking section 41. When the blocking section 41 is fully inserted into the damping oil hole 21, the end of the damping oil hole 21 abuts against the fixed section 42, thereby achieving double blocking of the inside and end of the damping oil hole 21. Optimally, the blocking section 41 is made of a flexible material, and the blocking section 41 is connected to the damping oil hole 21 in an interference fit to improve the air tightness of the blockage.

[0042] In some embodiments, the plug 4 includes a fixed section 41 and a blocking section 42, the blocking section 41 is fixedly connected to the fixed section 42, the blocking section 42 is conical or truncated, and the blocking section 42 partially extends into the damping oil hole 21 and is connected to the inner wall of the damping oil hole 21. Optimally, the blocking section 41 is made of a flexible material, and the blocking section 41 is interference-connected with the damping oil hole 21 to improve the airtightness of the blockage.

[0043] In this embodiment 1, optionally, refer to Figure 4 As shown, the fixing section 41 is embedded and connected with the end of the oil chamber 11 away from the opening 111, and the blocking section 42 is interference-connected with the damping oil hole 21. The interference connection means that the size of the blocking section 42 is slightly larger than the damping oil hole 21, so that a certain pre-tightening force is generated during assembly, so that the blocking section 42 can fit tightly on the damping oil hole 21, thereby limiting the flow of damping oil in the damping oil hole 21, and then the piston head 2 can stop sliding, achieving an anti-bottoming effect. In other embodiments, the fixing section 41 and the end of the oil chamber 11 away from the opening 111 include but are not limited to threaded connection, screw connection or snap connection, so as to achieve a fixing effect on the fixing section 41, thereby providing stable support for the blocking section 42.

[0044] In this embodiment 1, the blocking section 42 and the fixed section 42 are both columnar, the diameter of the blocking section 42 is not less than the diameter of the damping oil hole 21, and the diameter of the blocking section 42 is not greater than the diameter of the fixed section 41. This arrangement ensures that when the piston head 2 slides to the plug 4, the blocking section 42 can completely block the damping oil hole 21 to prevent leakage of the damping oil, while also achieving the function of preventing bottoming out.

[0045] In some embodiments, in order to facilitate maintenance of the inside of the cylinder 1, a bottom cover 5 is provided at one end of the cylinder 1 away from the opening 111, the bottom cover 5 is sealed with the cylinder 1, and a concave plug groove 51 is provided on the side of the bottom cover 5 facing the oil chamber 11, and the plug 4 is assembled in the plug groove 51. Thus, the bottom cover 5 is sealed with the cylinder 1, which enhances the sealing performance of the shock absorber, and can achieve a detachable effect, which is convenient for maintenance. Preferably, the orthographic projection area of ​​the blocking section 42 on the bottom cover 5 is smaller than the orthographic projection area of ​​the fixed section 41 on the bottom cover 5, the fixed section 41 is fixed in the plug groove, and the blocking section 42 at least partially extends out of the plug groove. Specifically, in the present embodiment, the fixing plug groove 51 includes a first accommodating portion 511, a second accommodating portion 512 and a third accommodating portion 513 from the inside to the outside, the first accommodating portion 511 is used to accommodate the fixing section 41, the diameter of the second accommodating portion 512 is smaller than that of the first accommodating portion 511, so as to correspond to the blocking section 42 of the plug 4, and a step portion for abutting the fixing section 41 is formed between the second accommodating portion 512 and the first accommodating portion 511, which is used to abut the plane between the blocking section 42 and the fixing section 41, so that the fixing section 41 and the first accommodating portion 511 are fixed and stably. The closer the third accommodating portion 513 is to the oil chamber 11, the larger its diameter is. Thus, during assembly, the third accommodating portion 513 can make it easier for the plug 4 to be aligned and slide into the plug groove 51, thereby improving the convenience of assembly. When the third accommodating portion is interference-connected with the damping oil hole 21, it can provide a deformation space for the sealing section 42 of the plug 4, which is more conducive to achieving a full sealing state of the damping oil hole 21 and preventing leakage of the damping oil.

[0046] In some embodiments, in order to improve the sealing performance of the connection between the bottom cover 5 and the cylinder barrel 1, the outer side of the bottom cover 5 includes abutment section 52, sealing section 53 and assembly section 54 from one end to the other end in sequence. The abutment section 52 abuts against the other end of the opening 111 of the cylinder barrel 1, which can ensure a stable covering connection between the bottom cover 5 and the cylinder barrel 1; the sealing section 53 is provided with a sealing groove 531, and a sealing ring 532 is provided in the sealing groove 531 to seal the oil chamber 11 of the cylinder barrel 1, which effectively prevents the damping oil from leaking from the connection between the cylinder barrel 1 and the bottom cover 5, thereby ensuring the stability and reliability of the shock absorber during long-term use; the assembly section 54 is provided with an external thread 541, and an internal thread 112 is provided at one end of the oil chamber 11 of the cylinder barrel 1 away from the opening 111, corresponding to the external thread 541. The threaded connection not only makes the connection between the bottom cover 5 and the cylinder barrel 1 more secure, but also facilitates installation and disassembly, thereby providing convenience for the maintenance and replacement of the shock absorber.

[0047] In this embodiment 1, the piston rod 3 includes a main rod body 31 and a damping adjustment rod 32. The main rod body 31 has an inner oil chamber 33. The inner oil chamber 33 is connected to the inner chamber of the cylinder 1 through the damping oil hole 21. One end of the damping adjustment rod 32 extends into the inner oil chamber 33 of the main rod body 31, and directly forms a damping gap with the damping oil hole 21 of the piston head 2. According to this arrangement, when the piston rod 3 slides in the cylinder 1, the damping oil flows between the inner oil chamber 33 and the inner chamber of the cylinder 1 through the damping oil hole 21, generating a damping force, thereby absorbing and dissipating the impact energy of the wheel 7, thereby achieving a damping and shock absorption effect.

[0048] In order to make the damping gap adjustable to adapt to the damping and shock absorption effects in different environments, in some embodiments, the main rod body 31 and the damping adjustment rod 32 can be threadedly connected, and the other end of the damping adjustment rod 32 passes through the main rod body 31 and is connected to a rotating member 6, and the rotating member 6 is used to adjust the size of the damping gap. Preferably, the rotating member 6 is provided with a screw hole 61 perpendicular to the axial direction of the damping adjustment rod 32, and the screw hole 61 is penetrated by a fixing member 62 fixed to the damping adjustment rod 32, allowing the user to easily adjust the size of the damping gap by rotating the rotating member 6. Specifically, when the rotating member 6 rotates, the fixing member 62 in the screw hole 61 will move along the axial direction of the damping adjustment rod 32, thereby pushing or pulling back the damping adjustment rod 32, and changing the damping gap between it and the damping oil hole 21 of the piston head 2.

[0049] The utility model also relates to a wheelbarrow. Figure 6-7 As shown, it includes a wheel 7, a frame 8 and an anti-bottoming damping shock absorber, and the anti-bottoming damping shock absorber is connected between the wheel 7 and the frame 8 to provide damping shock absorption. The cylinder 1 is fixed to the wheel 7 through a fixing frame, and the piston rod 3 is outer-mounted with an oil return spring 9, one end of the return spring 9 is fixedly connected to the frame 8, and the other end abuts against the cylinder 1, which helps to achieve the reset of the piston rod 3. This arrangement ensures the stability and reliability of the wheelbarrow under various road conditions. Whether it is high-speed driving or low-speed bumps, it can maintain stable damping performance, while avoiding the risk of the piston rod 3 bottoming out, and prolonging the service life of the damping shock absorber.

[0050] In summary, the anti-bottoming damping shock absorber and the unicycle having the same provided by the utility model have the following technical effects:

[0051] 1. Anti-bottoming design enhances safety: The plug 4 blocks the damping oil hole 21, preventing the piston head 2 from moving further to the bottom of the cylinder 1, thereby avoiding direct contact between the piston rod 3 and the bottom of the cylinder 1. This not only solves the problem of the piston rod 3 bottoming out, but also reduces the risk of damage to the shock absorber caused by bottoming out, thereby enhancing the riding safety of the unicycle.

[0052] 2. The service life of the damping shock absorber is improved: since the direct contact between the piston rod 3 and the bottom of the cylinder 1 is avoided, the wear caused by friction and impact is reduced, thereby significantly improving the service life of the damping shock absorber.

[0053] 3. Ensure stable damping performance: Whether in high-speed driving or low-speed bumps, the anti-bottoming damping shock absorber can maintain stable damping performance and provide continuous and reliable shock absorption effect for the unicycle.

[0054] 4. Improved the overall performance of the unicycle: Due to the effective effect of the anti-bottoming damping shock absorber, the unicycle can maintain good stability and comfort when dealing with various road conditions, thereby improving the overall performance of the unicycle.

[0055] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. An anti-bottoming damping shock absorber, characterized in that: include: A cylinder barrel (1), wherein the cylinder barrel (1) is an oil chamber (11) with an opening (111) at one end; A piston rod (3), one end of which extends from the opening (111) into the oil chamber (11) of the cylinder barrel (1) and is slidably connected to the cylinder barrel (1); A piston head (2), the piston head (2) being fixed to one end of the piston rod (3) and slidingly arranged in the oil chamber (11) following the piston rod (3), and the piston head (2) having a damping oil hole (21); A plug (4), the plug (4) being mounted at one end of the oil chamber (11) away from the opening (111) and opposite to the damping oil hole (21); when the piston head (2) slides to the plug (4), the plug (4) blocks the damping oil hole (21).

2. The anti-bottoming damping shock absorber according to claim 1, characterized in that: The plug (4) comprises a fixing section (41) and a blocking section (42); the blocking section (42) is fixedly connected to the fixing section (41); the blocking section (42) is inserted into the damping oil hole (21) and is sealedly connected to the inner wall of the damping oil hole (21); or the end of the blocking section (42) is sealedly abutted against the end of the damping oil hole (21).

3. The anti-bottoming damping shock absorber according to claim 1, characterized in that: The plug (4) comprises a fixing section (41) and a blocking section (42), wherein the blocking section (42) is fixedly connected to the fixing section (41), the blocking section (42) is conical or truncated cone-shaped, and a portion of the blocking section (42) extends into the damping oil hole (21) and is connected to the inner wall of the damping oil hole (21).

4. An anti-bottoming damping shock absorber according to claim 2 or 3, characterized in that: The blocking section (42) is made of a flexible material, and the blocking section (42) is interference-connected with the damping oil hole (21).

5. The anti-bottoming damping shock absorber according to claim 2, characterized in that: The blocking section (42) and the fixing section (41) are both columnar, the diameter of the blocking section (42) is not less than the diameter of the damping oil hole (21), and the diameter of the blocking section (42) is not greater than the diameter of the fixing section (41).

6. The anti-bottoming damping shock absorber according to claim 2, characterized in that: A bottom cover (5) is provided at one end of the cylinder barrel (1) away from the opening (111); the bottom cover (5) is sealingly connected to the cylinder barrel (1); and the bottom cover (5) is fixedly connected to the fixing section (41).

7. The anti-bottoming damping shock absorber according to claim 6, characterized in that: The orthographic projection area of ​​the blocking section (42) on the bottom cover (5) is smaller than the orthographic projection area of ​​the fixing section (41) on the bottom cover (5); the bottom cover (5) is provided with an inwardly concave fixing groove (51); the fixing section (41) is fixed in the fixing groove (51); and the blocking section (42) at least partially protrudes from the fixing groove (51).

8. The anti-bottoming damping shock absorber according to claim 7, characterized in that: The plugging groove (51) includes, from the inside to the outside of the groove: a first accommodating portion (511), the first accommodating portion (511) being used to accommodate the fixing section (41); a second accommodating portion (512), wherein the diameter of the second accommodating portion (512) is smaller than that of the first accommodating portion (511), and a step portion for abutting against the fixing section (41) is formed between the second accommodating portion (512) and the first accommodating portion (511); A third accommodating portion (513), wherein the closer the third accommodating portion (513) is to the oil chamber (11), the larger its diameter is.

9. The anti-bottoming damping shock absorber according to claim 6, characterized in that: The outer side of the bottom cover (5) comprises, from one end to the other end: an abutment section (52), the abutment section (52) abutting against the other end of the opening (111) of the cylinder barrel (1); A sealing section (53), wherein the sealing section (53) is provided with a sealing groove (531), and a sealing ring (532) is provided in the sealing groove (531) for sealing with the oil chamber (11) of the cylinder barrel (1); An assembly section (54) is provided with an external thread (541), and an end of the oil chamber (11) of the cylinder barrel (1) away from the opening (111) is provided with an internal thread (112) corresponding to the external thread (541).

10. A wheelbarrow, characterized in that: The vehicle comprises a wheel (7), a frame (8) and an anti-bottoming damping shock absorber according to any one of claims 1 to 9, wherein the anti-bottoming damping shock absorber is connected between the wheel (7) and the frame (8) to provide damping shock absorption.

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