CN112431882A

CN112431882A - Novel buffer structure and shock absorber

Info

Publication number: CN112431882A
Application number: CN202011435913.8A
Authority: CN
Inventors: 张恩弟; 刘勇
Original assignee: Tianjin Yuen Plastic Rubber Technology Co ltd
Current assignee: Tianjin Yuen Plastic Rubber Technology Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-03-02

Abstract

The invention discloses a novel buffer structure and a shock absorber, which comprise a buffer block and an anti-collision block, wherein the anti-collision block is fixedly arranged at the upper end of the buffer block, the buffer block and the anti-collision block are coaxially sleeved on a piston rod of the shock absorber, and the anti-collision block is arranged towards a cylinder barrel of the shock absorber. Anticollision piece is including anticollision cover, annular dashpot, anticollision top and annular arch, and anticollision cover is established to be fixed on buffer block upper portion, and anticollision cover upper end is equipped with the anticollision top, and annular dashpot has been seted up to anticollision cover outer wall, and anticollision cover lower extreme inner edge is equipped with annular arch, and anticollision cover inner wall and anticollision top inner wall are pasted fixedly with buffer block upper portion outer wall, and annular arch establishes fixedly with the buffer block outer wall card. The anti-collision block made of rubber is arranged on the buffer block, so that the anti-collision block bears the impact force of the cylinder barrel, and the service life of the buffer block is prolonged; the annular protrusion is just sleeved in the first groove, so that extrusion clamping force for the scraping device can be provided, the piston rod is tightly held by the scraping device, and the scraping effect is further improved.

Description

Novel buffer structure and shock absorber

Technical Field

The embodiment of the invention relates to the technical field of shock absorber accessories, in particular to a novel buffering structure and a shock absorber.

Background

The shock absorber needs to attenuate the impact load on the ground through reciprocating motion in the running process of an automobile, the buffer block is generally sleeved on a piston rod of the shock absorber, when the shock absorber is in the maximum stroke, and the piston rod feeds into an inner cavity of the cylinder barrel, the buffer block can limit the maximum stroke of the piston rod and absorb the impact load between the piston rod and the cylinder barrel, so that the shock absorber is protected. However, in northern China, particularly when the temperature is lowered to below zero in winter, the shock absorber is contacted with cold air to generate an icing layer, and the existing buffer block does not have the function of removing the icing layer or other foreign matters, so that the icing layer is attached to the piston rod to block the movement between the piston rod and the cylinder barrel, and the using effect of the buffer block is reduced, so that the service life of the shock absorber is greatly reduced.

In order to solve the above problems, the applicant filed patent numbers of 2019: 201921999702.X, an invention patent entitled "a bump stop and shock absorber", has substantially solved the related art problems of the prior art described above. However, in the practical application process, because the material that the buffer block adopted is the polyurethane foaming, factor influences such as hardness, life lead to the buffer block receive the multiple impact back of cylinder, its easy deformation and damage take place, not only has lost the buffering effect, and its effect of scraping to the piston rod also is showing and is reducing simultaneously.

Therefore, how to improve the impact resistance and prolong the service life of the buffer block while maintaining the buffering and scraping effects of the buffer block is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

Therefore, the embodiment of the invention provides a novel buffer structure and a shock absorber, so as to solve the related technical problems in the prior art.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

according to a first aspect of the embodiment of the invention, a novel buffer structure is provided, which comprises a buffer block and an anti-collision block, wherein the anti-collision block is fixedly arranged at the upper end of the buffer block, the buffer block and the anti-collision block are coaxially sleeved on a piston rod of a shock absorber, and the anti-collision block is arranged towards a cylinder barrel of the shock absorber.

Further, the anticollision piece includes anticollision cover, annular dashpot, anticollision top and annular arch, anticollision cover is established and is fixed buffer block upper portion, anticollision cover upper end is equipped with the anticollision top, annular dashpot has been seted up to anticollision cover outer wall, anticollision cover lower extreme inner edge is equipped with annular arch, anticollision cover inner wall and anticollision top inner wall are pasted fixedly with buffer block upper portion outer wall, annular arch is established fixedly with the buffer block outer wall card.

Further, the buffer block comprises 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, the exhaust groove is formed in the bottom of the block body, and the exhaust groove is communicated with the inner cavity.

Further, scraping device includes that a plurality of bars are protruding, and is a plurality of the protruding central axis that centers on the block of bar evenly sets up on the inner wall of inner chamber, the protruding spiral setting of bar, and adjacent the protruding projection end to end of bar overlaps in the vertical direction.

Further, the inner chamber includes first inner chamber, first hole, second inner chamber, second hole, third inner chamber and third hole, first inner chamber and block top intercommunication, first inner chamber below has set gradually first hole, second inner chamber, second hole, third inner chamber and third hole, the bar arch is located in the first inner chamber, third hole and block bottom intercommunication.

Further, the block body includes first arch, first recess, second arch, second recess, third arch, third recess and connection base, the connection base bottom is provided with the air discharge duct, connection base top has set gradually third recess, third arch, second recess, second arch, first recess and first arch, the protruding cover of annular is established in the first recess.

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

Further, still include rubber protrudingly, still be equipped with a plurality of rubber protrudingly on the crashproof top outer wall.

According to a second aspect of the embodiment of the invention, a shock absorber is provided, which comprises a dust cover, a piston rod, a damping spring, a cylinder barrel and the buffering structure, wherein the buffering structure is sleeved on the piston rod, the piston rod is movably inserted into an inner cavity of the cylinder barrel, the dust cover is arranged outside the buffering structure, the damping spring is arranged outside the dust cover, one end of the damping spring abuts against the cylinder barrel, and the other end of the damping spring abuts against the piston rod.

The embodiment of the invention has the following advantages:

1. buffer block inner chamber is provided with scraping device, scraping device cover is established on the piston rod, and the protruding and piston rod in close contact with of bar that sets up on the scraping device, when temperature was lower winter, the piston rod surface freezes and forms the frost layer, when the piston rod fed to the cylinder, the frost layer on piston rod surface can be by the protruding broken ice sediment that becomes of bar, then get into the buffer block inner chamber, when the piston rod reachs the maximum stroke, the buffer block is compressed, thereby make the ice sediment along with the air, discharge along the air discharge duct, the problem of leading to the life reduction of bumper shock absorber because the buffer block does not possess the function on deicing frost layer among the prior art has been solved from this.

2. This application has still set up the anticollision piece of rubber material on the buffer block, establishes through crashproof cover and fixes in the buffer block upper end, can directly contact with the cylinder when using, bears the impact of cylinder to realized the protection to the buffer block, the annular of anticollision cover is protruding to be just in time to be established in first recess, thereby can provide the extrusion clamping force to scraping device, makes scraping device hold the piston rod tightly, has further improved the effect of striking off. Therefore, through the setting of anticollision piece, can show the life who prolongs the buffer block, strengthen scraping effect simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is a perspective view of a buffer block provided in embodiment 1 of the present invention;

fig. 2 is a sectional view of a buffer block a according to embodiment 1 of the present invention;

fig. 3 is a top view of a buffer block according to embodiment 1 of the present invention;

FIG. 4 is an assembly view of a shock absorber according to embodiment 2 of the present invention;

in the figure: in the figure: 1, block body; 11 a first projection; 12 a first groove; 13 a second projection; 14 a second groove; 15 a third projection; 16 a third groove; 17 connecting the base; 2, an inner cavity; 21 a first lumen; 22 a first bore; 23 a second lumen; 24 a second bore; 25 a third lumen; 26 a third bore; 3, an exhaust groove; 4 a scraping device; 41 strip-shaped protrusions; 5, a dust cover; 6 a piston rod; 7 a damping spring; 8, a cylinder barrel; 9, an anti-collision block; 91 an anti-collision sleeve; 92 an annular buffer tank; 93 crashproof top; 94 annular protrusions; 95 rubber bumps.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 3, according to embodiment 1 of the present invention, a novel buffer structure is provided, which is applied in the field of a shock absorber, and includes a buffer block and an anti-collision block 9, where the anti-collision block 9 is fixedly disposed at an upper end of the buffer block, the buffer block and the anti-collision block 9 are coaxially sleeved on a piston rod of the shock absorber, and the anti-collision block 9 is disposed toward a cylinder of the shock absorber. This application has set up the anticollision piece 9 of rubber material on the buffer block, establishes through crashproof cover 91 cover and fixes in the buffer block upper end, can directly contact with the cylinder when using, bears the impact of cylinder to realized the protection to the buffer block, the life of extension buffer block.

Specifically, the bump guard 9 includes a bump guard 91, an annular cushion groove 92, a bump cap 93, and an annular protrusion 94. 91 cover of anticollision cover is established and is fixed buffer block upper portion, 91 upper ends of anticollision cover are equipped with anticollision top 93, annular dashpot 92 has been seted up to 91 outer wall of anticollision cover, 91 lower extreme inner edge of anticollision cover is equipped with

annular arch

94, 91 inner wall of anticollision cover and anticollision top 93 inner wall are pasted fixedly with buffer block upper portion outer wall, annular arch 94 is established fixedly with the buffer block outer wall card. Anticollision piece 9 establishes fixedly through anticollision cover 91 and buffer block cover, and its inner wall is fixed with the buffer block through pasting the mode simultaneously, and further annular protrusion 94 can with the buffer block on first recess 12 in close contact with to guaranteed the stable installation of anticollision piece 9, can not cause breaking away from of buffer block and anticollision piece 9. When in use, the crashproof roof 93 is directly contacted with the cylinder barrel 8 and can be arranged to have a certain thickness, thereby improving the crashproof capability. The annular buffer groove 92 can provide a buffering capacity when in use.

Further, the buffer block includes block 1, inner chamber 2, exhaust duct 3 and

scraping device

4, 1 the central axis department of block is provided with inner chamber 2, be provided with scraping device 4 in the

inner chamber

2, 1 bottom of block is provided with exhaust duct 3, exhaust duct 3 and inner chamber 2 intercommunication. When it is using, when the buffer block received the extrusion, the space of inner chamber 2 can be compressed, is provided with scraping device 4 in the inner chamber 2, and when block 1 was compressed, frozen frost layer on the piston rod 6 can be peeled by scraping device 4, and block 1 bottom is provided with exhaust duct 3 simultaneously, and exhaust duct 3 and inner chamber 2 intercommunication, the space of inner chamber 2 is compressed the back, and the air in the inner chamber 2 can be along exhaust duct 3 discharges.

Further, scraping device 4 includes a plurality of protruding 41 of bar, and is a plurality of protruding 41 of bar evenly sets up on the inner wall of inner chamber 2 around the central axis of block 1, the protruding 41 spiral settings of bar, and adjacent protruding 41 of bar overlaps at the projection end to end of vertical direction. As the block body 1 is sleeved on the piston rod 6 of the buffer, the frost layer is frozen on the piston rod 6, and the strip-shaped bulge 41 is in close contact with the surface of the piston rod 6, thereby ensuring the effect of crushing the frost layer.

Further, inner chamber 2 includes first inner chamber 21, first hole 22, second inner chamber 23, second hole 24, third inner chamber 25 and third hole 26, first

inner chamber

21 and 1 top intercommunication of block, first inner chamber 21 below has set gradually first hole 22, second inner chamber 23, second hole 24, third inner chamber 25 and third hole 26, protruding 41 of bar is located in the first hole 22,

third hole

26 and 1 bottom intercommunication of block. The inner diameters of the first, second and third

inner bores

22, 24 and 26 are sequentially increased to facilitate the outward exhaustion of the first, second and third

inner chambers

21, 23 and 25 along the exhaust groove 3. Furthermore, when the block body 1 is compressed under pressure, the air stored in the first inner cavity 21, the second inner cavity 23 and the third inner cavity 25 can play a certain role of buffering the action force of the fluid on a plane or a curved surface or an object, thereby improving the durability of the whole buffering block.

Be provided with the protruding 41 of a plurality of bars on the first hole 22 inner wall, and the protruding 41 projection end to end overlap of vertical direction of adjacent bar,

third hole

26 and 1 bottom intercommunication of block, piston rod 6's surface can freeze the frost layer of ice winter, because piston rod 6 inserts and establishes in first hole 22, through being provided with the protruding 41 of a plurality of bars on the 22 inner walls of first hole, the protruding 41 spiral coils of a plurality of bars is on the 22 inner walls of first hole, a closed ring can be constituteed in the protruding 41 vertical direction's of a plurality of bars projection, then can effectively scrape the frost layer clean. Furthermore, a plurality of bar-shaped bulges 41 also have a certain ventilation effect, when the block body 1 is compressed, the air in the inner cavity 2 can flow out along the gap between the adjacent bar-shaped bulges 41, so that the inner cavity 2 is prevented from being blocked, and the air flow is further utilized to achieve the buffering effect of the auxiliary buffer block.

Further, the block body 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, the bottom end of the connecting base 17 is provided with an exhaust groove 3, and the third groove 16, the third protrusion 15, the second groove 14, the second protrusion 13, the first groove 12 and the first protrusion 11 are sequentially arranged above the connecting base 17. 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, thereby compressing and superposing the first projection 11, the second projection 13 and the third projection 15 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 load, which causes the problem of stress concentration on the side surface of the buffer block, thereby improving the durability of the buffer block.

In this embodiment, because annular protrusion 94 is sleeved in first groove 12, as shown in the figure, annular protrusion 94 just blocks scraping device 4 corresponding to first groove 12, and annular protrusion 94 made of rubber can protect scraping device 4, and can slow down the deformation of scraping device 4 when the buffer structure is impacted, and on the other hand, annular protrusion 94 can provide the extrusion clamping force for scraping device 4, so that scraping device 4 clasps the piston rod, and the scraping effect is further improved.

In this embodiment, the buffer block is made of polyurethane, and the polyurethane has the characteristics of high strength, tear resistance and wear resistance, and is suitable for being used as a manufacturing material of the buffer block. The material of the anti-collision block 9 is rubber. The added rubber bumper block 9 can remarkably prolong the service life of the bumper block made of polyurethane under the condition of keeping the characteristics of the bumper block made of polyurethane, and can resist the impact from a cylinder barrel.

Further, still include rubber bulge 95, still be equipped with a plurality of rubber bulge 95 on the crashproof top 93 outer wall. The rubber bulge 95 can be directly contacted with the cylinder barrel 8 when in use, thereby improving the anti-collision and buffering effects to a certain extent.

The application process of embodiment 1 of the invention is as follows:

buffer structure cover is established on piston rod 6, when piston rod 6 received pressure and feeds to the inner chamber of cylinder 8, the frost layer of ice on the piston rod 6 is peeled off by bar arch 41, and anticollision piece 9 on the buffer structure receives impact load, block 1 is compressed, the space of first inner chamber 21, second inner chamber 23 and third inner chamber 2 is compressed simultaneously, the air in the inner chamber 2 is discharged by exhaust duct 3 along inner chamber 2, the frost layer of ice also can be discharged outside block 1 along with the air simultaneously, thereby solved among the prior art because the buffer block does not possess the function of removing the frost layer and lead to the problem that the life of bumper shock absorber reduces. Simultaneously, the anti-collision block 9 can slow down the direct inflation of the cylinder barrel 8, thereby prolonging the service life of the buffer block.

Example 2

According to a second aspect of the embodiment of the present invention, as shown in fig. 4, a shock absorber is provided, which includes a dust cover 5, a piston rod 6, a shock absorbing spring 7, a cylinder 8 and the above-mentioned buffering structure, wherein the buffering structure is sleeved on the piston rod 6, the piston rod 6 is movably inserted into an inner cavity of the cylinder 8, the dust cover 5 is arranged outside the buffering structure, the shock absorbing spring 7 is arranged outside the dust cover 5, one end of the shock absorbing spring 7 abuts against the cylinder 8, and the other end of the shock absorbing spring 7 abuts against the piston rod 6.

The application process of embodiment 2 of the invention is as follows:

the bumper shock absorber mainly uses on the chassis of motor vehicle, and when the bumper shock absorber received impact load, the bumper shock absorber can be with the kinetic energy conversion that receives to damping spring 7's elastic potential energy, because damping spring 7 one end offsets with cylinder 8, the other end offsets with piston rod 6 to make damping spring 7's elastic potential energy finally transmit piston rod 6 and cylinder 8 on, it receives impact load to have decayed the bumper shock absorber from this, then plays the effect of shock attenuation buffering for whole motor vehicle.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides a novel buffer structure, its characterized in that, includes buffer block and anticollision piece (9), anticollision piece (9) are fixed to be located the buffer block upper end, just buffer block and anticollision piece (9) coaxial sleeve establish on the piston rod of bumper shock absorber, just anticollision piece (9) set up towards the cylinder of bumper shock absorber.

2. The novel buffer structure as claimed in claim 1, wherein the crash block (9) comprises a crash sleeve (91), an annular buffer groove (92), a crash top (93) and an annular protrusion (94), the crash sleeve (91) is sleeved and fixed on the upper portion of the buffer block, the crash top (93) is arranged at the upper end of the crash sleeve (91), the annular buffer groove (92) is arranged on the outer wall of the crash sleeve (91), the annular protrusion (94) is arranged on the inner edge of the lower end of the crash sleeve (91), the inner wall of the crash sleeve (91) and the inner wall of the crash top (93) are fixedly adhered to the outer wall of the upper portion of the buffer block, and the annular protrusion (94) is fixedly clamped to the outer wall of the buffer block.

3. The novel buffer structure according to claim 2, wherein 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 communicated with the inner cavity (2).

4. The novel buffer structure of claim 2, wherein the scraping device (4) comprises a plurality of strip-shaped protrusions (41), the plurality of strip-shaped protrusions (41) are uniformly arranged on the inner wall of the inner cavity (2) around the central axis of the block body (1), the strip-shaped protrusions (41) are spirally arranged, and the projections of the adjacent strip-shaped protrusions (41) in the vertical direction are overlapped end to end.

5. The novel buffer structure according to claim 2, wherein 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 communicated with the top end of the block body (1), the first inner hole (22), the second inner cavity (23), the second inner hole (24), the third inner hole (25) and the third inner hole (26) are sequentially arranged 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 communicated with the bottom end of the block body (1).

6. The novel buffer structure according to claim 2, wherein the block body (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), the bottom end of the connecting base (17) is provided with an exhaust groove (3), the third groove (16), the third protrusion (15), the second groove (14), the second protrusion (13), the first groove (12) and the first protrusion (11) are sequentially arranged above the connecting base (17), and the annular protrusion (94) is sleeved in the first groove (12).

7. A novel buffer structure as claimed in claim 1, wherein the buffer block is made of polyurethane, and the anti-collision block (9) is made of rubber.

8. A novel buffer structure as claimed in claim 2, further comprising rubber protrusions (95), wherein a plurality of rubber protrusions (95) are further provided on the outer wall of the crash roof (93).

9. The shock absorber is characterized by comprising a dust cover (5), a piston rod (6), a shock absorption spring (7), a cylinder barrel (8) and the buffer structure as claimed in any one of claims 1 to 8, wherein the buffer structure is sleeved on the piston rod (6), the piston rod (6) is movably inserted into an inner cavity of the cylinder barrel (8), the dust cover (5) is arranged outside the buffer structure, the shock absorption spring (7) is arranged outside the dust cover (5), one end of the shock absorption spring (7) is abutted against the cylinder barrel (8), and the other end of the shock absorption spring (7) is abutted against the piston rod (6).