A new type of buffer structure and shock absorber

Abstract

The present invention discloses a novel buffer structure and shock absorber, including a buffer block and an anti-collision block. The anti-collision block is fixedly arranged at the upper end of the buffer block, and the buffer block and the anti-collision block are coaxially sleeved on the piston rod of the shock absorber, and the anti-collision block is arranged toward the cylinder of the shock absorber. The anti-collision block includes an anti-collision sleeve, an annular buffer groove, an anti-collision top and an annular protrusion. The anti-collision sleeve is sleeved and fixed on the upper part of the buffer block, an anti-collision top is arranged at the upper end of the anti-collision sleeve, an annular buffer groove is opened on the outer wall of the anti-collision sleeve, an annular protrusion is arranged on the inner edge of the lower end of the anti-collision sleeve, the inner wall of the anti-collision sleeve and the inner wall of the anti-collision top are glued and fixed to the outer wall of the upper part of the buffer block, and the annular protrusion is clamped and fixed to the outer wall of the buffer block. By arranging an anti-collision block made of rubber material on the buffer block, the anti-collision block bears the impact force of the cylinder, thereby extending the service life of the buffer block; the annular protrusion is just sleeved in the first groove, thereby providing an extrusion and holding force for the scraping device, so that the scraping device holds the piston rod tightly, further improving the scraping effect.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of shock absorber accessories, and in particular to a novel buffer structure and a shock absorber. Background Art

[0002] The shock absorber needs to attenuate the impact load of the ground through reciprocating motion during the driving process of the car, and the buffer block is generally mounted on the piston rod of the shock absorber. When the shock absorber is at the maximum stroke and the piston rod is fed into the inner cavity of the cylinder, the buffer block can limit the maximum stroke of the piston rod and absorb the impact load between the piston rod and the cylinder, thereby protecting the shock absorber. However, in northern China, especially in winter, the temperature often drops below zero, and the shock absorber will produce a frost layer when it comes into contact with the cold air. The existing buffer block does not have the function of removing the frost layer or other foreign matter. Therefore, the frost layer adheres to the piston rod, which will hinder the movement between the piston rod and the cylinder, and will also reduce the use effect of the buffer block, which greatly reduces the service life of the shock absorber.

[0003] In order to solve the above problems, the applicant applied for an invention patent with the patent number: 201921999702.X in 2019, entitled "A buffer block and shock absorber", which has basically solved the relevant technical problems existing in the above-mentioned prior art. However, in actual application, since the material of the buffer block is polyurethane foam, factors such as hardness and service life affect the buffer block, which is easily deformed and damaged after being hit by the cylinder barrel many times, not only losing the buffering effect, but also significantly reducing its scraping effect on the piston rod.

[0004] Therefore, how to improve the anti-impact effect and extend the service life of the buffer block while maintaining its buffering and scraping effects is a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] To this end, an embodiment of the present invention provides a novel buffer structure and a shock absorber to solve the related technical problems existing in the prior art.

[0006] In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:

[0007] According to a first aspect of an embodiment of the present invention, a new buffer structure is provided, including a buffer block and an anti-collision block, wherein the anti-collision block is fixedly arranged at the upper end of the buffer block, and the buffer block and the anti-collision block are coaxially sleeved on the piston rod of the shock absorber, and the anti-collision block is arranged toward the cylinder of the shock absorber.

[0008] Furthermore, the anti-collision block includes an anti-collision sleeve, an annular buffer groove, an anti-collision top and an annular protrusion. The anti-collision sleeve is fixed on the upper part of the buffer block, the upper end of the anti-collision sleeve is provided with an anti-collision top, the outer wall of the anti-collision sleeve is provided with an annular buffer groove, the inner edge of the lower end of the anti-collision sleeve is provided with an annular protrusion, the inner wall of the anti-collision sleeve and the inner wall of the anti-collision top are glued and fixed to the upper outer wall of the buffer block, and the annular protrusion is fixed to the outer wall of the buffer block.

[0009] Furthermore, the buffer block includes a block body, an inner cavity, an exhaust groove and a scraping device. The inner cavity is arranged at the central axis of the block body, the scraping device is arranged in the inner cavity, and the exhaust groove is arranged at the bottom of the block body, and the exhaust groove is connected with the inner cavity.

[0010] Furthermore, the scraping device comprises a plurality of strip-shaped protrusions, which are evenly arranged on the inner wall of the inner cavity around the central axis of the block, the strip-shaped protrusions are spirally arranged, and the projections of adjacent strip-shaped protrusions in the vertical direction overlap head to tail.

[0011] Furthermore, the inner cavity includes a first inner cavity, a first inner hole, a second inner cavity, a second inner hole, a third inner cavity and a third inner hole. The first inner cavity is connected to the top of the block. The first inner hole, the second inner cavity, the second inner hole, the third inner cavity and the third inner hole are arranged in sequence below the first inner cavity. The strip-shaped protrusion is arranged in the first inner hole, and the third inner hole is connected to the bottom of the block.

[0012] Furthermore, the block includes a first protrusion, a first groove, a second protrusion, a second groove, a third protrusion, a third groove and a connecting base, an exhaust groove is provided at the bottom end of the connecting base, and a third groove, a third protrusion, a second groove, a second protrusion, a first groove and a first protrusion are sequentially provided above the connecting base, and the annular protrusion is sleeved in the first groove.

[0013] Furthermore, the buffer block is made of polyurethane, and the anti-collision block is made of rubber.

[0014] Furthermore, it also includes a rubber protrusion, and a plurality of rubber protrusions are provided on the outer wall of the anti-collision top.

[0015] According to a second aspect of an embodiment of the present invention, a shock absorber is provided, comprising a dust cover, a piston rod, a shock absorbing spring, a cylinder and a buffer structure as described above, wherein the buffer structure is sleeved on the piston rod, the piston rod is movably inserted in the inner cavity of the cylinder, a dust cover is arranged outside the buffer structure, the shock absorbing spring is arranged outside the dust cover, one end of the shock absorbing spring is abutted against the cylinder, and the other end of the shock absorbing spring is abutted against the piston rod.

[0016] The embodiments of the present invention have the following advantages:

[0017] 1. A scraping device is provided in the inner cavity of the buffer block. The scraping device is sleeved on the piston rod, and the strip-shaped protrusions provided on the scraping device are in close contact with the piston rod. When the temperature is low in winter, the surface of the piston rod freezes to form a frost layer. When the piston rod feeds into the cylinder, the frost layer on the surface of the piston rod will be broken into ice debris by the strip-shaped protrusions and then enter the inner cavity of the buffer block. When the piston rod reaches the maximum stroke, the buffer block is compressed, so that the ice debris is discharged along the exhaust groove along with the air, thereby solving the problem in the prior art that the service life of the shock absorber is reduced because the buffer block does not have the function of removing the frost layer.

[0018] 2. The present application also sets a rubber anti-collision block on the buffer block, which is fixed on the upper end of the buffer block by an anti-collision sleeve. When in use, it can directly contact the cylinder barrel and withstand the impact force of the cylinder barrel, thereby protecting the buffer block. At the same time, the annular protrusion of the anti-collision sleeve is just set in the first groove, thereby providing an extrusion and holding force on the scraping device, so that the scraping device holds the piston rod tightly, further improving the scraping effect. Therefore, by setting the anti-collision block, the service life of the buffer block can be significantly extended, and the scraping effect can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 A three-dimensional diagram of a buffer block provided in Example 1 of the present invention;

[0022] Figure 2 A cross-sectional view of a buffer block provided in the embodiment 1 of the present invention;

[0023] Figure 3 A top view of a buffer block provided in Example 1 of the present invention;

[0024] Figure 4 An assembly diagram of a shock absorber provided in Example 2 of the present invention;

[0025] In the figure: In the figure: 1 block; 11 first protrusion; 12 first groove; 13 second protrusion; 14 second groove; 15 third protrusion; 16 third groove; 17 connecting base; 2 inner cavity; 21 first inner cavity; 22 first inner hole; 23 second inner cavity; 24 second inner hole; 25 third inner cavity; 26 third inner hole; 3 exhaust groove; 4 scraping device; 41 strip protrusion; 5 dust cover; 6 piston rod; 7 shock-absorbing spring; 8 cylinder; 9 anti-collision block; 91 anti-collision sleeve; 92 annular buffer groove; 93 anti-collision top; 94 annular protrusion; 95 rubber protrusion. DETAILED DESCRIPTION

[0026] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figure 1-3 As shown in , according to Example 1 of the present invention, a new type of buffer structure is provided, which is applied in the field of shock absorbers, including a buffer block and an anti-collision block 9, wherein the anti-collision block 9 is fixedly arranged at the upper end of the buffer block, and the buffer block and the anti-collision block 9 are coaxially sleeved on the piston rod of the shock absorber, and the anti-collision block 9 is arranged toward the cylinder barrel of the shock absorber. The present application provides an anti-collision block 9 made of rubber material on the buffer block, which is sleeved and fixed on the upper end of the buffer block by an anti-collision sleeve 91, and can directly contact the cylinder barrel when in use, and withstand the impact force of the cylinder barrel, thereby realizing the protection of the buffer block and extending the service life of the buffer block.

[0029] Specifically, the anti-collision block 9 includes an anti-collision sleeve 91, an annular buffer groove 92, an anti-collision top 93 and an annular protrusion 94. The anti-collision sleeve 91 is sleeved and fixed on the upper part of the buffer block, the upper end of the anti-collision sleeve 91 is provided with an anti-collision top 93, the outer wall of the anti-collision sleeve 91 is provided with an annular buffer groove 92, the inner edge of the lower end of the anti-collision sleeve 91 is provided with an annular protrusion 94, the inner wall of the anti-collision sleeve 91 and the inner wall of the anti-collision top 93 are glued and fixed to the outer wall of the upper part of the buffer block, and the annular protrusion 94 is clamped and fixed to the outer wall of the buffer block. The anti-collision block 9 is sleeved and fixed with the buffer block through the anti-collision sleeve 91, and its inner wall is fixed with the buffer block by gluing. Further, the annular protrusion 94 can be in close contact with the first groove 12 on the buffer block, thereby ensuring the stable installation of the anti-collision block 9 and will not cause the separation of the buffer block and the anti-collision block 9. When in use, the anti-collision top 93 directly contacts the cylinder 8 and can be set to have a certain thickness, thereby improving the anti-collision ability. The annular buffer groove 92 can provide buffering capacity during use.

[0030] Furthermore, the buffer block includes a block body 1, an inner cavity 2, an exhaust groove 3 and a scraping device 4. The inner cavity 2 is provided at the central axis of the block body 1, and the scraping device 4 is provided in the inner cavity 2. The exhaust groove 3 is provided at the bottom of the block body 1, and the exhaust groove 3 is communicated with the inner cavity 2. When the buffer block is used, when the buffer block is squeezed, the space of the inner cavity 2 will be compressed, and the scraping device 4 is provided in the inner cavity 2. When the block body 1 is compressed, the frost layer frozen on the piston rod 6 will be peeled off by the scraping device 4. At the same time, the exhaust groove 3 is provided at the bottom of the block body 1, and the exhaust groove 3 is communicated with the inner cavity 2. After the space of the inner cavity 2 is compressed, the air in the inner cavity 2 will be discharged along the exhaust groove 3.

[0031] Furthermore, the scraping device 4 includes a plurality of strip protrusions 41, which are evenly arranged on the inner wall of the inner cavity 2 around the central axis of the block 1, and the strip protrusions 41 are spirally arranged, and the projections of adjacent strip protrusions 41 in the vertical direction overlap head to tail. Since the block 1 is sleeved on the piston rod 6 of the buffer, a frost layer is frozen on the piston rod 6, and the strip protrusions 41 are in close contact with the surface of the piston rod 6, thereby ensuring the effect of breaking the frost layer.

[0032] Further, the inner cavity 2 includes a first inner cavity 21, a first inner hole 22, a second inner cavity 23, a second inner hole 24, a third inner cavity 25 and a third inner hole 26, the first inner cavity 21 is connected to the top of the block 1, the first inner cavity 21 is provided with a first inner hole 22, a second inner cavity 23, a second inner hole 24, a third inner cavity 25 and a third inner hole 26 in sequence below the first inner cavity 21, the strip-shaped protrusion 41 is provided in the first inner hole 22, and the third inner hole 26 is connected to the bottom of the block 1. The inner diameters of the first inner hole 22, the second inner hole 24 and the third inner hole 26 increase in sequence, so as to facilitate the first inner cavity 21, the second inner cavity 23 and the third inner cavity 25 to exhaust outward along the exhaust groove 3. Furthermore, when the block 1 is compressed by pressure, the air stored in the first inner cavity 21, the second inner cavity 23 and the third inner cavity 25 can also play a certain buffering role by utilizing the force of the fluid on the plane or curved surface or object, thereby improving the overall durability of the buffer block.

[0033] A plurality of strip-shaped protrusions 41 are arranged on the inner wall of the first inner hole 22, and the projections of adjacent strip-shaped protrusions 41 in the vertical direction overlap each other. The third inner hole 26 is connected to the bottom end of the block 1. In winter, a frost layer will freeze on the surface of the piston rod 6. Since the piston rod 6 is inserted into the first inner hole 22, a plurality of strip-shaped protrusions 41 are arranged on the inner wall of the first inner hole 22. The plurality of strip-shaped protrusions 41 are spirally wound on the inner wall of the first inner hole 22. The projections of the plurality of strip-shaped protrusions 41 in the vertical direction can form a closed circular ring, which can effectively scrape off the frost layer. Furthermore, the plurality of strip-shaped protrusions 41 also have a certain ventilation effect. When the block 1 is compressed, the air in the inner cavity 2 will flow out along the gaps between the adjacent strip-shaped protrusions 41, thereby preventing the inner cavity 2 from being blocked, and further utilizing the air flow to achieve the buffering effect of the auxiliary buffer block.

[0034] Furthermore, the block 1 includes a first protrusion 11, a first groove 12, a second protrusion 13, a second groove 14, a third protrusion 15, a third groove 16 and a connecting base 17, the bottom end of the connecting base 17 is provided with an exhaust groove 3, and the top of the connecting base 17 is provided with a third groove 16, a third protrusion 15, a second groove 14, a second protrusion 13, a first groove 12 and a first protrusion 11 in sequence. When the block 1 is subjected to pressure, the block 1 is bent and folded by the first groove 12, the second groove 14 and the third groove 16, so that the first protrusion 11, the second protrusion 13 and the third protrusion 15 are compressed and superimposed together. Furthermore, the bending and folding of the first groove 12, the second groove 14 and the third groove 16 can prevent the buffer block from being subjected to impact loads, thereby improving the durability of the buffer block.

[0035] In this embodiment, since the annular protrusion 94 is sleeved in the first groove 12, as shown in the figure, the annular protrusion 94 is just stuck in the scraping device 4 corresponding to the first groove 12, and the annular protrusion 94 made of rubber material can protect the scraping device 4 and reduce the deformation of the scraping device 4 when the buffer structure is hit. On the other hand, the annular protrusion 94 can provide an extrusion and support force to the scraping device 4, so that the scraping device 4 holds the piston rod tightly, further improving the scraping effect.

[0036] In this embodiment, the material of the buffer block is polyurethane, which has the characteristics of high strength, tear resistance and wear resistance, and is suitable as a material for making the buffer block. The material of the anti-collision block 9 is rubber. While the polyurethane buffer block maintains its characteristics, the added anti-collision block 9 made of rubber can significantly increase its service life and withstand the impact from the cylinder.

[0037] Furthermore, it also includes rubber protrusions 95, and a plurality of rubber protrusions 95 are provided on the outer wall of the anti-collision top 93. The rubber protrusions 95 can directly contact the cylinder 8 when in use, thereby also being able to improve its anti-collision and buffering effects to a certain extent.

[0038] The use process of Example 1 of the present invention is as follows:

[0039] The buffer structure is sleeved on the piston rod 6. When the piston rod 6 is fed into the inner cavity of the cylinder 8 under pressure, the frost layer on the piston rod 6 is peeled off by the strip protrusion 41, and the anti-collision block 9 on the buffer structure is subjected to impact load, the block 1 is compressed, and at the same time, the space of the first inner cavity 21, the second inner cavity 23 and the third inner cavity 2 is compressed, and the air in the inner cavity 2 is discharged along the inner cavity 2 through the exhaust groove 3, and at the same time, the frost layer is also discharged to the outside of the block 1 with the air, thereby solving the problem in the prior art that the service life of the shock absorber is reduced because the buffer block does not have the function of removing the frost layer. At the same time, the anti-collision block 9 can slow down the direct inflation of the cylinder 8, thereby extending the service life of the buffer block.

[0040] Example 2

[0041] According to a second aspect of the embodiment of the present invention, Figure 4 , provides a shock absorber, including a dust cover 5, a piston rod 6, a shock absorbing spring 7, a cylinder 8 and a buffer structure as described above, wherein the buffer structure is sleeved on the piston rod 6, and the piston rod 6 is movably inserted in the inner cavity of the cylinder 8, a dust cover 5 is arranged outside the buffer structure, and the shock absorbing spring 7 is arranged outside the dust cover 5, one end of the shock absorbing spring 7 is abutted against the cylinder 8, and the other end of the shock absorbing spring 7 is abutted against the piston rod 6.

[0042] The use process of Example 2 of the present invention is as follows:

[0043] Shock absorbers are mainly used on the chassis of motor vehicles. When the shock absorber is subjected to an impact load, the shock absorber will convert the kinetic energy it receives into the elastic potential energy of the shock-absorbing spring 7. Since one end of the shock-absorbing spring 7 is against the cylinder 8 and the other end is against the piston rod 6, the elastic potential energy of the shock-absorbing spring 7 is finally transferred to the piston rod 6 and the cylinder 8, thereby weakening the impact load on the shock absorber and playing a shock-absorbing and buffering role for the entire motor vehicle.

[0044] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A novel buffer structure, characterized in that: It comprises a buffer block and an anti-collision block (9), wherein the anti-collision block (9) is fixedly arranged at the upper end of the buffer block, and the buffer block and the anti-collision block (9) are coaxially sleeved on the piston rod of the shock absorber, and the anti-collision block (9) is arranged toward the cylinder of the shock absorber, the buffer block is made of polyurethane, and the anti-collision block (9) is made of rubber; The anti-collision block (9) comprises an anti-collision sleeve (91), an annular buffer groove (92), an anti-collision top (93) and an annular protrusion (94); the anti-collision sleeve (91) is sleeved and fixed on the upper part of the buffer block; the upper end of the anti-collision sleeve (91) is provided with an anti-collision top (93); the outer wall of the anti-collision sleeve (91) is provided with an annular buffer groove (92); the inner edge of the lower end of the anti-collision sleeve (91) is provided with an annular protrusion (94); the inner wall of the anti-collision sleeve (91) and the inner wall of the anti-collision top (93) are glued and fixed to the outer wall of the upper part of the buffer block; the annular protrusion (94) is clamped and fixed to the outer wall of the buffer block; and the anti-collision sleeve (91) further comprises a rubber protrusion (95); and a plurality of rubber protrusions (95) are also provided on the outer wall of the anti-collision top (93).

2. The novel buffer structure according to claim 1 is characterized in that: The buffer block comprises a block body (1), an inner cavity (2), an exhaust groove (3) and a scraping device (4); the inner cavity (2) is arranged at the central axis of the block body (1); the scraping device (4) is arranged in the inner cavity (2); the exhaust groove (3) is arranged at the bottom of the block body (1); and the exhaust groove (3) is connected to the inner cavity (2).

3. The novel buffer structure according to claim 2 is characterized in that: The scraping device (4) comprises a plurality of strip-shaped protrusions (41), which are evenly arranged on the inner wall of the inner cavity (2) around the central axis of the block (1), and the strip-shaped protrusions (41) are arranged in a spiral, and the projections of adjacent strip-shaped protrusions (41) in the vertical direction overlap end to end.

4. The novel buffer structure according to claim 3 is characterized in that: The inner cavity (2) comprises a first inner cavity (21), a first inner hole (22), a second inner cavity (23), a second inner hole (24), a third inner cavity (25) and a third inner hole (26); the first inner cavity (21) is connected to the top of the block (1); the first inner hole (22), the second inner cavity (23), the second inner hole (24), the third inner cavity (25) and the third inner hole (26) are arranged in sequence below the first inner cavity (21); the strip-shaped protrusion (41) is arranged in the first inner hole (22); and the third inner hole (26) is connected to the bottom of the block (1).

5. The novel buffer structure according to claim 2, characterized in that: The block (1) comprises a first protrusion (11), a first groove (12), a second protrusion (13), a second groove (14), a third protrusion (15), a third groove (16) and a connecting base (17); an exhaust groove (3) is arranged at the bottom end of the connecting base (17); a third groove (16), a third protrusion (15), a second groove (14), a second protrusion (13), a first groove (12) and a first protrusion (11) are arranged in sequence above the connecting base (17); and the annular protrusion (94) is sleeved in the first groove (12).

6. A shock absorber, characterized in that: The invention comprises a dust cover (5), a piston rod (6), a shock absorbing spring (7), a cylinder (8) and a novel buffer structure as described in any one of claims 1 to 5, wherein the buffer structure is sleeved on the piston rod (6), the piston rod (6) is movably inserted in the inner cavity of the cylinder (8), a dust cover (5) is arranged outside the buffer structure, the shock absorbing spring (7) is arranged outside the dust cover (5), one end of the shock absorbing spring (7) is abutted against the cylinder (8), and the other end of the shock absorbing spring (7) is abutted against the piston rod (6).

Images