Automobile shock absorber with anti-shake function

Abstract

The invention discloses an automobile shock absorber with an anti-shake function, which relates to the technical field of automobile parts and comprises a cylinder barrel, a piston rod, an oil seal buffer part, a positioning plate, a scraping shell, a scraping opening, a guide inclined surface and an abutting mechanism, impurities adhered to the surface of the piston rod can be effectively scraped off through the scraping opening in the scraping shell in the moving process of the piston rod, the situation that the friction contact area of the piston rod and the oil seal is seriously abraded due to impurity adhesion is avoided, meanwhile, when the piston rod is pressed downwards, the contact block can extrude the second spring, the pressing speed and strength of the upper support are reduced, and the service life of the piston rod is prolonged. More stable and uniform stress is provided for the first spring in the compression process, through the design, the problem that the first spring is damaged or unstable due to sudden impact is avoided, gas extruded in the first cavity can be used for blowing away impurities left at the top of the scraping shell, and the scraping shell is prevented from being scraped off; and the problem of secondary abrasion or adhesion of the piston rod caused by residual impurities at the top of the scraping shell is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile parts, and in particular relates to an automobile shock absorber with an anti-shake function. Background Art

[0002] In order to quickly attenuate the vibration of the frame and the body of the vehicle and improve the smoothness and comfort of the vehicle's driving, shock absorbers are generally installed on the vehicle suspension system. The vehicle shock absorber is mainly composed of a cylinder, a piston rod, an oil seal connecting the top of the cylinder and the piston rod, and a buffer member arranged between the piston rod and the outer surface of the cylinder. However, in actual use, the movement of the piston rod in the external environment easily causes dust, mud and other impurities to adhere to its surface. These impurities will aggravate the friction between the piston rod and the oil seal, further causing the leakage of the oil inside the shock absorber, thereby weakening the effectiveness of the shock absorber. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an automobile shock absorber with an anti-shake function that can overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: an automobile shock absorber with anti-shake function, including a cylinder, a piston rod is provided on the cylinder, an oil seal connected to the top of the cylinder is sleeved on the piston rod, a buffer is provided between the piston rod and the outer surface of the cylinder, and also includes a positioning plate sleeved on the piston rod and located above the oil seal, a scraper shell is provided between the positioning plate and the oil seal, a scraper opening that is connected to the scraper shell and fits the surface of the piston rod, the top diameter of the scraper shell is smaller than the bottom diameter, forming a natural guiding inclined surface, and a plurality of contact mechanisms arranged on the positioning plate and linked with the buffer, when the buffer is compressed, the surface of the piston rod will be scraped along the scraper opening on the scraper shell, and at the same time, the buffer linkage contact mechanism blows away the impurities scraped off from the top of the scraper shell, and when the buffer is compressed to reset, the buffer linkage contact mechanism drives the scraper shell to perform reciprocating intermittent motion from bottom to top.

[0005] Preferably, the buffer member includes a lower support fixedly connected to the cylinder, the lower support is connected to a first spring sleeved between the cylinder and the outer surface of the piston rod, the other end of the first spring is connected to an upper support, and the upper support is fixedly connected to the end of the piston rod corresponding to the outside of the cylinder.

[0006] Preferably, an upper extension rod is fixedly connected to the upper support, an upper mounting ring is fixedly connected to the upper extension rod, a lower extension rod is fixedly connected to the bottom of the cylinder, and a lower mounting ring is fixedly connected to the lower extension rod.

[0007] Preferably, a plurality of circumferentially distributed support plates are fixedly connected between the bottom of the positioning plate and the top of the oil seal, an annular edge extends from the bottom edge of the scraper shell, and a support portion is fixedly connected between the bottom of the annular edge and the top of the oil seal.

[0008] Preferably, the contact mechanism includes a positioning cylinder fixedly connected to the positioning plate, a first cavity is opened inside the positioning cylinder, a circular moving block is fitted between the inner walls of the first cavity, a contact rod is fixedly connected to the top of the circular moving block, one end of the contact rod passes through the top of the positioning cylinder and is fixedly connected to the contact block, and the surface of the contact rod is sleeved with a second spring fixedly connected between the bottom of the contact block and the top of the positioning cylinder.

[0009] Preferably, the bottom of the positioning cylinder is connected to a horizontal cylinder located below the positioning plate, a second cavity connected to the first cavity is provided inside the horizontal cylinder, an air duct is connected to the bottom of the horizontal cylinder, the other end of the air duct is connected to a jet plate fixedly connected to the bottom of the positioning plate, an annular cavity connected to a corresponding end of the air duct is provided inside the jet plate, and a plurality of air outlet heads distributed circumferentially and corresponding to the top of the scraper shell are connected to the bottom of the jet plate.

[0010] Preferably, the jet plate is in a ring shape, and the jet plate is located at the center of the positioning plate.

[0011] Preferably, the support portion is an elastic structure, a plurality of resistance plates are fixedly connected to the top of the annular edge, a curved resistance surface is provided on the top of the resistance plate, and a toggle mechanism linked along the curved resistance surface is provided on the transverse cylinder.

[0012] Preferably, the toggle mechanism comprises a rotating rod rotatably connected to the transverse cylinder, a plurality of blades each fitting against the inner wall of the second cavity are fixedly connected to the rotating rod, and a cam fitting against the arc-shaped abutting surface is fixedly connected to one end of the rotating rod.

[0013] Preferably, a gap space is reserved between the cam and the bottom of the positioning plate.

[0014] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention can effectively scrape off impurities adhered to the surface of the piston rod through the scraping opening on the scraper shell during the movement of the piston rod, thereby preventing the friction contact area between the piston rod and the oil seal from being severely worn due to the adhesion of impurities. At the same time, when the piston rod drives the upper support downward, the contact block will squeeze the second spring, thereby slowing down the speed and force of the upper support downward, providing a more stable and uniform force for the first spring during the compression process. This design not only avoids damage or instability of the first spring caused by sudden impact, but also can use the gas squeezed in the first cavity to blow away impurities retained on the top of the scraper shell, avoiding the problem of secondary wear or adhesion of the piston rod caused by impurities remaining on the top of the scraper shell, thereby more efficiently reducing the wear between the piston rod and the oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In the attached picture: Figure 1 This is a schematic cross-sectional view of the connection between the cylinder and the piston rod of an automobile shock absorber with an anti-shake function proposed by the present invention; Figure 2 This is a schematic diagram of the overall structure of an automobile shock absorber with an anti-shake function proposed by the present invention; Figure 3 A schematic diagram of the explosion structure of an automobile shock absorber with an anti-shake function proposed by the present invention; Figure 4 This is a schematic diagram of the connection structure between the positioning plate and the piston rod of an automobile shock absorber with an anti-shake function proposed by the present invention; Figure 5 For the present invention Figure 1 A local enlarged structural diagram of the part; Figure 6 This is a schematic diagram of the connection structure between the positioning plate and the positioning cylinder of a vehicle shock absorber with an anti-shake function proposed by the present invention; Figure 7 A schematic cross-sectional view of a vehicle shock absorber with an anti-shake function proposed by the present invention Figure 1 ; Figure 8 A schematic cross-sectional view of a vehicle shock absorber with an anti-shake function proposed by the present invention Figure 2 .

[0016] In the figure: 1. cylinder barrel; 2. piston rod; 3. oil seal; 4. buffer; 41. lower support; 411. lower extension rod; 412. lower mounting ring; 42. first spring; 43. upper support; 431. upper extension rod; 432. upper mounting ring; 5. positioning plate; 51. scraper shell; 52. scraper mouth; 53. guide slope; 54. support plate; 55. annular edge; 56. support part; 57. positioning cylinder; 58. first cavity; 59. circular moving block; 510. contact rod; 511. contact block; 512. second spring; 513. transverse cylinder; 514. second cavity; 515. air guide tube; 516. jet plate; 517. annular cavity; 518. air outlet head; 519. contact plate; 520. arc-shaped contact surface; 521. rotating rod; 522. blade; 523. cam. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0018] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0019] In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. to indicate 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. They 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 should not be understood as a limitation on the present invention.

[0020] Example 1: Reference Figure 1-Figure 3 A car shock absorber with anti-shake function comprises a cylinder 1, a piston rod 2 is arranged on the cylinder 1, an oil seal 3 connected to the top of the cylinder 1 is sleeved on the piston rod 2, a buffer 4 is arranged between the piston rod 2 and the outer surface of the cylinder 1, the buffer 4 comprises a lower support 41 fixedly connected to the cylinder 1, a first spring 42 sleeved between the cylinder 1 and the outer surface of the piston rod 2 is connected to the lower support 41, the other end of the first spring 42 is connected to an upper support 43, the upper support 43 is fixedly connected to the corresponding end of the piston rod 2 located outside the cylinder 1, an upper extension rod 431 is fixedly connected to the upper support 43, an upper mounting ring 432 is fixedly connected to the upper extension rod 431, a lower extension rod 411 is fixedly connected to the bottom of the cylinder 1, and a lower mounting ring 412 is fixedly connected to the lower extension rod 411.

[0021] When the automobile shock absorber is used, the upper mounting ring 432 is connected to a part of the vehicle body or the suspension system, and the lower mounting ring 412 is fixed to the wheel axle or the bottom of the frame. When the automobile is driving on an uneven road and encounters bumps, the piston rod 2 will move relatively inside the cylinder 1. During this movement, the piston rod 2 will drive the upper support 43 to squeeze the first spring 42 to absorb the vibration energy transmitted to the automobile by the road surface. As the road surface rises and falls, the first spring 42 will continuously compress and recover, thereby reducing the shaking of the vehicle body and improving the driving stability. In view of the fact that this mechanism belongs to the widely used existing technology, it will not be further elaborated here.

[0022] Example 2: Reference Figure 3 and Figure 4 On the basis of the above-mentioned embodiment 1, it also includes a positioning plate 5 which is sleeved on the piston rod 2 and located above the oil seal 3. A plurality of supporting plates 54 distributed in a circumference are fixedly connected between the bottom of the positioning plate 5 and the top of the oil seal 3. A scraper shell 51 is provided between the positioning plate 5 and the oil seal 3. The scraper shell 51 is connected to a scraper opening 52 which fits the surface of the piston rod 2. The top diameter of the scraper shell 51 is smaller than the bottom diameter, forming a natural guiding inclined surface 53. An annular edge 55 extends from the bottom edge of the scraper shell 51. A supporting portion 56 is fixedly connected between the bottom of the annular edge 55 and the top of the oil seal 3.

[0023] Such a technical solution is adopted in view of the fact that the piston rod 2 is exposed to the external environment and its surface is easily adhered to impurities such as dust and mud. When the piston rod 2 moves in the cylinder 1, these impurities adhered to the piston rod 2 will aggravate the friction between the piston rod 2 and the oil seal 3. This situation will not only reduce the sealing performance of the oil seal 3, but may also cause leakage of the oil inside the shock absorber, thereby posing a serious threat to the normal operation of the shock absorber. Based on this problem, a scraper shell 51 is designed on the piston rod 2. The scraper mouth 52 on the scraper shell 51 can effectively scrape off the impurities on the surface of the piston rod 2 during the movement of the piston rod 2, thereby avoiding serious wear of the friction contact area between the piston rod 2 and the oil seal 3 due to the impurities attached to the surface of the piston rod 2, thereby preventing the problem of oil leakage inside the cylinder 1.

[0024] In addition, the guiding bevel 53 of the scraper shell 51 can cooperate with the scraper shell 51, so that the impurities scraped off the piston rod 2 can be smoothly discharged along the guiding bevel 53, thereby avoiding the accumulation of impurities in the top area of ​​the scraper shell 51. This design ensures that the piston rod 2 will not adhere again due to contact with the previously scraped and accumulated impurities during the resetting process.

[0025] Example 3: Reference Figure 3-Figure 8On the basis of the above-mentioned embodiment 2, the difference is that a plurality of contact mechanisms are arranged on the positioning plate 5 and linked with the buffer member 4, the contact mechanism includes a positioning cylinder 57 fixedly connected to the positioning plate 5, a first cavity 58 is opened inside the positioning cylinder 57, a circular moving block 59 is fitted between the inner walls of the first cavity 58, a contact rod 510 is fixedly connected to the top of the circular moving block 59, one end of the contact rod 510 that passes through the top of the positioning cylinder 57 is fixedly connected to a contact block 511, and a second spring 512 is fixedly connected between the bottom of the contact block 511 and the top of the positioning cylinder 57 on the surface of the contact rod 510.

[0026] A plurality of contact blocks 511 are correspondingly designed below the upper support 43. When the piston rod 2 drives the upper support 43 downward, the bottom of the upper support 43 will contact these contact blocks 511 and squeeze the second spring 512 between the contact block 511 and the positioning cylinder 57. This design, on the one hand, is intended to slow down the speed and force of the downward pressure of the upper support 43, thereby providing a more stable and uniform force for the first spring 42 during the compression process, and avoiding damage or instability of the first spring 42 due to sudden impact.

[0027] Furthermore, in the above technical scheme, when the buffer 4 is compressed, the impurities adhered to the surface of the piston rod 2 will not only be scraped along the scraping opening 52 on the scraper shell 51, but also, during this process, the buffer 4 can be linked with the contact mechanism to further blow away the impurities scraped off from the top of the scraper shell 51. The bottom of the positioning cylinder 57 is connected to a transverse cylinder 513 located below the positioning plate 5. The interior of the transverse cylinder 513 is provided with a second cavity 514 connected to the first cavity 58. The bottom of the transverse cylinder 513 is connected to an air guide pipe 515. The other end of the air guide pipe 515 is connected to an injection plate 516 fixedly connected to the bottom of the positioning plate 5. The interior of the injection plate 516 is provided with an annular cavity 517 connected to the corresponding end of the air guide pipe 515. The bottom of the injection plate 516 is connected to a plurality of air outlet heads 518 distributed in a circle and corresponding to the top of the scraper shell 51. The injection plate 516 is ring-shaped and is located at the center of the positioning plate 5.

[0028] Through the design of the contact mechanism, on the one hand, it not only effectively slows down the speed and force of the upper support 43 pressing down, but also provides a more stable and uniform force environment for the first spring 42 in the compression stage, successfully avoiding the risk of damage or instability of the first spring 42 caused by instantaneous impact. On the other hand, when the contact block 511 is pressed down by the upper support 43, it will squeeze the second spring 512, thereby driving the circular moving block 59 on the contact rod 510 to slide smoothly on the inner wall of the first cavity 58, and transport the gas in the first cavity 58 to the annular cavity 517 through the air guide pipe 515. Subsequently, these gases are evenly distributed to the gas outlet head 518 through the annular cavity 517 and blown out toward the top of the scraper shell 51, deeply blowing away the residual impurities adhered to the piston rod 2 at the top of the scraper shell 51. Finally, these blown impurities are smoothly discharged under the guidance of the guide slope 53. This design further reduces the residual amount of impurities at the top of the scraper shell 51, and effectively avoids the secondary wear problem caused by the adhesion of impurities at the connection between the piston rod 2 and the scraper shell 51.

[0029] Example 4: Reference Figure 5-Figure 8 On the basis of the above-mentioned embodiment 3, when the buffer member 4 is compressed to reset, the buffer member 4 is linked to the contact mechanism to drive the scraper shell 51 to perform reciprocating intermittent motion from bottom to top. The support portion 56 is an elastic structure. A plurality of resistance plates 519 are fixedly connected to the top of the annular edge 55. The top of the resistance plate 519 is provided with an arc-shaped resistance surface 520. The horizontal cylinder 513 is provided with a toggle mechanism linked along the arc-shaped resistance surface 520. The toggle mechanism includes a rotating rod 521 rotatably connected to the horizontal cylinder 513. A plurality of blades 522 are fixedly connected to the rotating rod 521, each of which is in contact with the inner wall of the second cavity 514. A cam 523 is fixedly connected to one end of the rotating rod 521, which is in contact with the arc-shaped resistance surface 520. A gap space is reserved between the cam 523 and the bottom of the positioning plate 5.

[0030] Such a technical solution is adopted because, in the above technical solution, although the blowing method can effectively remove some impurities on the top of the scraper shell 51, when the impurities are in a sticky state, it is difficult to remove them by blowing. Based on this problem, a rotating rod 521 is designed on the horizontal cylinder 513. When the gas in the first cavity 58 is squeezed into the second cavity 514 through the circular moving block 59, the blade 522 will be driven to drive the cam 523 on the rotating rod 521 to rotate. During the rotation process, the cam 523 will be repeatedly squeezed along the arc-shaped contact surface 520 on the top of the contact plate 519. Since the contact plate 519 is connected to the annular edge 55, this squeezing action will also be transmitted to the annular edge 55 to repeatedly squeeze the elastic support part 56, thereby realizing the reciprocating shaking of the scraper shell 51 from top to bottom and cooperating with the blowing method. In this way, even impurities with strong viscosity can be effectively removed, thereby being able to more efficiently reduce the wear problem between the piston rod 2 and the oil seal 3.

[0031] It should be noted that in the above technical solution, the support portion 56 is designed to be elastic, and specifically, a spiral spring piece or a hard elastic corrugated structure can be adopted. The choice of these two structures can be flexibly adjusted according to actual usage. Such a design ensures that the support portion 56 can produce reciprocating vibration when squeezed by the cam 523, thereby more effectively removing impurities remaining on the top of the scraper shell 51.

[0032] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. An automobile shock absorber with anti-shake function, comprising: Cylinder barrel (1); The cylinder barrel (1) is provided with a piston rod (2), the piston rod (2) is sleeved with an oil seal (3) connected to the top of the cylinder barrel (1), and a buffer (4) is provided between the piston rod (2) and the outer surface of the cylinder barrel (1); the invention is characterized in that it further comprises: a positioning plate (5) sleeved on the piston rod (2) and located above the oil seal (3); a scraper shell (51) is provided between the positioning plate (5) and the oil seal (3); the scraper shell (51) is connected to a scraper opening (52) that fits the surface of the piston rod (2); the top diameter of the scraper shell (51) is smaller than the bottom diameter, forming a natural guiding inclined surface (53); and a plurality of contact mechanisms arranged on the positioning plate (5) and linked to the buffer member (4); When the buffer (4) is compressed, the surface of the piston rod (2) will scrape along the scraping opening (52) on the scraper shell (51), and at the same time, the buffer (4) is linked with the contact mechanism to blow away the impurities scraped off the top of the scraper shell (51); When the buffer member (4) is compressed to reset, the buffer member (4) is linked with the contact mechanism to drive the scraper shell (51) to perform reciprocating intermittent motion from bottom to top.

2. The automobile shock absorber with anti-shake function according to claim 1, characterized in that: The buffer member (4) comprises a lower support (41) fixedly connected to the cylinder (1), the lower support (41) being connected to a first spring (42) sleeved between the cylinder (1) and the outer surface of the piston rod (2), the other end of the first spring (42) being connected to an upper support (43), the upper support (43) being fixedly connected to an end of the piston rod (2) corresponding to the end located outside the cylinder (1).

3. The automobile shock absorber with anti-shake function according to claim 2, characterized in that: An upper extension rod (431) is fixedly connected to the upper support (43), an upper mounting ring (432) is fixedly connected to the upper extension rod (431), a lower extension rod (411) is fixedly connected to the bottom of the cylinder (1), and a lower mounting ring (412) is fixedly connected to the lower extension rod (411).

4. The automobile shock absorber with anti-shake function according to claim 1, characterized in that: A plurality of support plates (54) distributed in a circumferential pattern are fixedly connected between the bottom of the positioning plate (5) and the top of the oil seal (3); an annular edge (55) extends from the bottom edge of the scraper shell (51); and a support portion (56) is fixedly connected between the bottom of the annular edge (55) and the top of the oil seal (3).

5. The automobile shock absorber with anti-shake function according to claim 4, characterized in that: The contact mechanism comprises a positioning cylinder (57) fixedly connected to the positioning plate (5), a first cavity (58) being provided inside the positioning cylinder (57), a circular moving block (59) being fitted between inner walls of the first cavity (58), a contact rod (510) being fixedly connected to the top of the circular moving block (59), one end of the contact rod (510) penetrating to the top of the positioning cylinder (57) being fixedly connected to a contact block (511), and a second spring (512) being fixedly connected between the bottom of the contact block (511) and the top of the positioning cylinder (57) being sleeved on the surface of the contact rod (510).

6. The automobile shock absorber with anti-shake function according to claim 5, characterized in that: The bottom of the positioning cylinder (57) is connected to a transverse cylinder (513) located below the positioning plate (5); a second cavity (514) communicating with the first cavity (58) is provided inside the transverse cylinder (513); an air guide tube (515) is connected to the bottom of the transverse cylinder (513); the other end of the air guide tube (515) is connected to an air jet plate (516) fixedly connected to the bottom of the positioning plate (5); an annular cavity (517) communicating with a corresponding end of the air guide tube (515) is provided inside the air jet plate (516); and a plurality of air outlet heads (518) distributed in a circumference and corresponding to the top of the scraper shell (51) are connected to the bottom of the air jet plate (516).

7. The automobile shock absorber with anti-shake function according to claim 6, characterized in that: The jet plate (516) is ring-shaped, and the jet plate (516) is located at the center of the positioning plate (5).

8. The automobile shock absorber with anti-shake function according to claim 6, characterized in that: The support portion (56) is an elastic structure, a plurality of contact plates (519) are fixedly connected to the top of the annular edge (55), an arc-shaped contact surface (520) is provided on the top of the contact plate (519), and a toggle mechanism that is linked along the arc-shaped contact surface (520) is provided on the transverse cylinder (513).

9. The automobile shock absorber with anti-shake function according to claim 8, characterized in that: The toggle mechanism comprises a rotating rod (521) rotatably connected to the transverse cylinder (513), a plurality of blades (522) each of which is in contact with the inner wall of the second cavity (514) being fixedly connected to the rotating rod (521), and a cam (523) in contact with the arc-shaped abutting surface (520) being fixedly connected to one end of the rotating rod (521).

10. The automobile shock absorber with anti-shake function according to claim 9, characterized in that: A gap space is reserved between the cam (523) and the bottom of the positioning plate (5).

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