Silent shock absorber piston assembly

Abstract

The utility model relates to the technical field of shock absorber piston assemblies, and discloses a mute shock absorber piston assembly which comprises a piston body, an installation cavity is formed in the piston body, a first oil hole is formed in the piston body, a second oil hole is formed in the piston body, and a through hole is formed in the piston body. The inner wall of the through hole is fixedly connected with a locking support, and a fixing ring is arranged on the surface of the locking support in an attached mode. According to the piston assembly, the locking support, the fixing ring, the annular groove, the threaded cylinder, the pressing plate and the pressing column are matched, the rebuilt valve plate on the piston assembly is convenient to disassemble and assemble, meanwhile, the circulating valve plate can be disassembled and assembled by rotating the threaded cylinder, and meanwhile after the piston rod is screwed into the threaded groove, the circulating valve plate can be disassembled and assembled. The positioning column is inserted into the first positioning hole and the second positioning hole, so that the piston rod and the threaded cylinder cannot rotate, and the pressure of the spring piece on the circulating valve piece can be kept unchanged.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorber piston assemblies, in particular to a silent shock absorber piston assembly. Background Art

[0002] The shock absorber is an important part of the automobile suspension system, and is mainly used to absorb the elastic potential energy generated when the shock absorber spring is stretched and retracted. The shock absorber piston is set on the piston rod, and is used to separate the inner cylinder of the shock absorber into two oil chambers. As the shock absorber piston rod moves, the piston squeezes the shock absorber oil in the inner cylinder so that it passes through the first and second oil holes on the piston to absorb energy. The piston is provided with a valve plate that can cover the first and second oil holes, thereby realizing the adjustment of the damping force of the shock absorber.

[0003] At present, the silent shock absorber piston assembly on the market mainly controls the opening and closing of the first oil hole and the second oil hole when the piston body moves through the circulation valve plate and the restoring valve plate. For example, a silent shock absorber piston disclosed in Chinese Patent Publication No. CN220060349U, however, since the restoring valve plate and the piston body are fixed by riveting, it is more troublesome to disassemble and assemble the restoring valve plate, which makes it more troublesome for maintenance personnel to replace the damaged restoring valve plate. At the same time, since the pressure plate used to fix the spring plate is connected to the piston body by threads, and the pressure plate is not locked after being screwed into the piston body, the pressure of the pressure plate on the spring plate is often reduced due to the vibration of the shock absorber, resulting in unstable pressure of the spring plate on the circulation valve plate. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, such as: at present, the silent shock absorber piston assembly on the market mainly controls the opening and closing of the first oil hole and the second oil hole when the piston body moves through the circulation valve plate and the restoration valve plate, but since the restoration valve plate and the piston body are fixed by riveting, it is more troublesome to disassemble and assemble the restoration valve plate, which makes it more troublesome for maintenance personnel to replace the damaged restoration valve plate. At the same time, since the pressure plate used to fix the spring plate is connected to the piston body by threads, and the pressure plate is not locked after being screwed into the piston body, the pressure of the pressure plate on the spring plate is often reduced due to the vibration of the shock absorber, thereby causing the pressure of the spring plate on the circulation valve plate to be unstable, and a silent shock absorber piston assembly is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The silent shock absorber piston assembly comprises a piston body, a mounting cavity is provided inside the piston body, a first oil hole is provided inside the piston body, a second oil hole is provided inside the piston body, a through hole is provided inside the piston body, a locking bracket is fixedly connected to the inner wall of the through hole, a fixing ring is fitted on the surface of the locking bracket, an annular groove is provided on the inner wall of the fixing ring, the inner wall of the annular groove contacts the surface of the locking bracket, a restoration valve sheet is fitted on the left side of the fixing ring and the surface of the locking bracket and the right side of the piston body, a threaded cylinder is threadedly connected to the inner wall of the mounting cavity, a pressure plate is fixedly connected to the right side of the threaded cylinder, a third oil hole is provided inside the pressure plate, a spring sheet is fitted on the right side of the pressure plate and the inner wall of the mounting cavity, a circulation valve sheet is fitted on the right side of the spring sheet and the inner wall of the mounting cavity, a fourth oil hole is provided inside the circulation valve sheet, a pressing column is fixedly connected to the right side of the pressure plate, and the right side of the pressing column contacts the left side of the locking bracket.

[0007] Preferably, the first oil hole, the second oil hole and the through hole are all interconnected with the mounting cavity, and the centers of the first oil hole, the third oil hole and the fourth oil hole are all on the same horizontal line.

[0008] Preferably, the locking bracket includes a cylinder, the surface of the cylinder is fixedly connected to the inner wall of the through hole, a conical hole is opened on the surface of the cylinder, the inner wall of the cylinder and the right side of the pressing column are fitted with conical columns, the surface of the conical column, the inner wall of the conical hole and the inner wall of the annular groove are fitted with steel balls, and a cylinder is fixedly connected to the right side of the conical column, and the surface of the cylinder is in contact with the inner wall of the cylinder.

[0009] Preferably, a sealing sleeve is fitted on the surface of the piston body, and limiting rings are fitted on both left and right sides of the sealing sleeve, and the inner wall of the limiting ring is fixedly connected to the surface of the piston body.

[0010] Preferably, a threaded groove is provided on the left side of the pressure plate, the inner wall of the threaded groove is threadedly connected to a piston rod, a first positioning hole is provided inside the piston rod, and second positioning holes are provided on the upper and lower sides of the piston body, and positioning columns are fitted on the inner wall of the second positioning hole, the first positioning hole, the left side of the threaded cylinder and the inner wall of the sealing sleeve.

[0011] Preferably, the second positioning hole and the mounting cavity are connected to each other.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) The utility model is provided with a locking bracket, a fixing ring, an annular groove, a threaded barrel, a pressure plate and a pressing column, wherein when the pressing column presses the conical column on the locking bracket, the steel ball is clamped in the annular groove through the conical column, and then, through the cooperation of the steel ball and the annular groove, the fixing ring is fixed to the locking bracket, and the restoring valve plate is fixed to the piston body through the fixing ring. When the pressing column is separated from the conical column, the fixing ring and the restoring valve plate can be separated from the locking bracket, and then, through the cooperation of the locking bracket, the fixing ring, the annular groove, the threaded barrel, the pressure plate and the pressing column, the restoring valve plate on the piston assembly is more convenient to disassemble and assemble. At the same time, by rotating the threaded barrel, the circulation valve plate can also be disassembled and assembled.

[0014] (2) The utility model provides a first positioning hole, a second positioning hole and a positioning column. When the piston rod is screwed into the threaded groove, the positioning column is inserted into the first positioning hole and the second positioning hole, so that the piston rod and the threaded barrel cannot rotate. Therefore, after the shock absorber is vibrated, the piston rod and the threaded barrel will not rotate due to the vibration, so that the pressure of the spring sheet on the flow valve sheet can remain unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a left side view of the piston body in the utility model;

[0017] Figure 3 It is a top view of the piston body in the utility model;

[0018] Figure 4 It is a front view of the locking bracket in the utility model;

[0019] Figure 5 for Figure 4 Sectional view at AA;

[0020] Figure 6 It is a schematic diagram of the interior of the fixing ring in the utility model;

[0021] Figure 7 It is a right side view of the middle pressure plate of the utility model;

[0022] Figure 8 It is a left view of the middle pressure plate of the utility model;

[0023] Fig. 9 It is a left view of the spring sheet in the utility model;

[0024] Fig.10 It is a left view of the flow valve plate in the utility model;

[0025] Fig.11 It is a top view of the piston rod in the utility model.

[0026] In the figure: 1. piston body; 2. mounting cavity; 3. first oil hole; 4. second oil hole; 5. through hole; 6. locking bracket; 61. cylinder; 62. tapered hole; 63. tapered column; 64. steel ball; 65. cylinder; 7. fixing ring; 8. annular groove; 9. restoring valve plate; 10. threaded cylinder; 11. pressure plate; 12. third oil hole; 13. spring plate; 14. circulation valve plate; 15. fourth oil hole; 16. pressing column; 17. sealing sleeve; 18. limiting ring; 19. threaded groove; 20. piston rod; 21. first positioning hole; 22. second positioning hole; 23. positioning column. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "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, rather than indicating or implying 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.

[0029] Embodiment 1:

[0030] Reference Figure 1-10The silent shock absorber piston assembly comprises a piston body 1, a mounting cavity 2 is provided inside the piston body 1, a first oil hole 3 is provided inside the piston body 1, a second oil hole 4 is provided inside the piston body 1, a through hole 5 is provided inside the piston body 1, the through hole 5 is located in the middle of the piston body 1, the distance between the first oil hole 3 and the through hole 5 is smaller than the distance between the second oil hole 4 and the through hole 5, a locking bracket 6 is fixedly connected to the inner wall of the through hole 5, a fixing ring 7 is fitted on the surface of the locking bracket 6, an annular groove 8 is provided on the inner wall of the fixing ring 7, the inner wall of the annular groove 8 contacts the surface of the locking bracket 6, a restoring valve sheet 9 is fitted on the left side of the fixing ring 7, the surface of the locking bracket 6 and the right side of the piston body 1, a threaded cylinder 10 is threadedly connected to the inner wall of the mounting cavity 2, and a pressing plate 11 is fixedly connected to the right side of the threaded cylinder 10, A third oil hole 12 is provided inside the pressure plate 11, a spring sheet 13 is fitted on the right side of the pressure plate 11 and the inner wall of the mounting chamber 2, a circulation valve sheet 14 is fitted on the right side of the spring sheet 13 and the inner wall of the mounting chamber 2, a fourth oil hole 15 is provided inside the circulation valve sheet 14, the first oil hole 3, the second oil hole 4 and the through hole 5 are interconnected with the mounting chamber 2, the centers of the first oil hole 3, the third oil hole 12 and the fourth oil hole 15 are on the same horizontal line, the shock-absorbing oil passing through the right side of the piston body 1 can only flow to the left side of the piston body 1 through the second oil hole 4 through the restoration valve sheet 9, and the shock-absorbing oil on the left side of the piston body 1 can only flow to the right side of the piston body 1 through the first oil hole 3 through the circulation valve sheet 14, a pressing column 16 is fixedly connected to the right side of the pressure plate 11, and the right side of the pressing column 16 contacts the left side of the locking bracket 6.

[0031] The locking bracket 6 includes a cylinder 61, the surface of which is fixedly connected to the inner wall of the through hole 5, a conical hole 62 is provided on the surface of the cylinder 61, a conical column 63 is fitted on the inner wall of the cylinder 61 and the right side of the pressing column 16, a steel ball 64 is fitted on the surface of the conical column 63, the inner wall of the conical hole 62 and the inner wall of the annular groove 8, a cylinder 65 is fixedly connected to the right side of the conical column 63, the surface of the cylinder 65 contacts the inner wall of the cylinder 61, and the pressing column 16 is locked. The diameter of the pressing column 16 is smaller than the diameter of the cylinder 65, and the center of the pressing column 16 is on the same horizontal line as the center of the cylinder 65. When the pressing column 16 presses the conical column 63, the steel ball 64 is brought into contact with the annular groove 8 through the conical column 63, and the fixing ring 7 is fixed on the cylinder 61 through the cooperation of the steel ball 64 and the annular groove 8. When the pressing column 16 is separated from the conical column 63, the fixing ring 7 and the restoration valve plate 9 can be directly removed from the cylinder 61.

[0032] Embodiment 2:

[0033] Reference Figure 1-3A sealing sleeve 17 is fitted on the surface of the piston body 1, and limiting rings 18 are fitted on both sides of the sealing sleeve 17. The inner wall of the limiting ring 18 is fixedly connected to the surface of the piston body 1. The sealing sleeve 17 is clamped on the piston body 1 through the limiting ring 18, and the gap between the piston body 1 and the shock absorber cylinder is sealed through the sealing sleeve 17.

[0034] Embodiment three:

[0035] Reference Figure 1-11 A thread groove 19 is provided on the left side of the pressure plate 11, and a piston rod 20 is threadedly connected to the inner wall of the thread groove 19. A first positioning hole 21 is provided inside the piston rod 20, and second positioning holes 22 are provided on the upper and lower sides of the piston body 1. The second positioning hole 22 is communicated with the mounting cavity 2. The inner wall of the second positioning hole 22, the first positioning hole 21, the left side of the threaded cylinder 10 and the inner wall of the sealing sleeve 17 are all fitted with positioning columns 23. When the positioning column 23 is inserted into the first positioning hole 21 and the second positioning hole After the piston rod 20 is inserted into the first positioning hole 21 and the second positioning hole 22, the sealing sleeve 17 prevents the positioning column 23 from being moved out of the first positioning hole 21 and the second positioning hole 22. At the same time, when the piston rod 20 is screwed into the thread groove 19, the positioning column 23 is inserted into the first positioning hole 21 and the second positioning hole 22, so that the piston rod 20 and the threaded tube 10 cannot rotate. Therefore, after the shock absorber is vibrated, the piston rod 20 and the threaded tube 10 will not rotate due to the vibration, so that the pressure of the spring sheet 13 on the circulation valve sheet 14 can remain unchanged.

[0036] In the utility model, when the user uses the shock absorber piston assembly, the piston rod 20 is first screwed into the threaded groove 19, and then the positioning column 23 is inserted into the first positioning hole 21 and the second positioning hole 22, and the positioning column 23, the first positioning hole 21 and the second positioning hole 22 cooperate to make the piston rod 20 and the threaded tube 10 unable to rotate. When the shock-absorbing oil on the left side of the piston body 1 pushes the piston body 1 to the right, the piston rod 20 can be moved to the right by the shock-absorbing oil, and the first oil hole 3 is opened by the thrust of the shock-absorbing oil on the restoration valve plate 9. At this time, the shock-absorbing oil on the left side of the piston body 1 can flow to the right side of the piston body 1 through the first oil hole 3. When the shock-absorbing oil on the right side of the piston body 1 pushes the piston body 1 to the left, the piston rod 20 can be moved to the left by the shock-absorbing oil, and the second oil hole 4 is opened by the thrust of the shock-absorbing oil convection valve plate 14. At this time, the shock-absorbing oil on the right side of the piston body 1 can flow to the left side of the piston body 1 through the second oil hole 4.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A silent shock absorber piston assembly, comprising a piston body (1), characterized in that: The piston body (1) is provided with an installation cavity (2), the piston body (1) is provided with a first oil hole (3), the piston body (1) is provided with a second oil hole (4), the piston body (1) is provided with a through hole (5), the inner wall of the through hole (5) is fixedly connected with a locking bracket (6), the surface of the locking bracket (6) is fitted with a fixing ring (7), the inner wall of the fixing ring (7) is provided with an annular groove (8), the inner wall of the annular groove (8) contacts the surface of the locking bracket (6), and the left side of the fixing ring (7), the surface of the locking bracket (6) and the right side of the piston body (1) are all fitted with a recovery valve plate ( 9), the inner wall of the installation cavity (2) is threadedly connected to a threaded barrel (10), the right side of the threaded barrel (10) is fixedly connected to a pressure plate (11), a third oil hole (12) is provided inside the pressure plate (11), the right side of the pressure plate (11) and the inner wall of the installation cavity (2) are both fitted with a spring sheet (13), the right side of the spring sheet (13) and the inner wall of the installation cavity (2) are both fitted with a circulation valve sheet (14), a fourth oil hole (15) is provided inside the circulation valve sheet (14), the right side of the pressure plate (11) is fixedly connected to a pressing column (16), the right side of the pressing column (16) is in contact with the left side of the locking bracket (6).

2. The silent shock absorber piston assembly according to claim 1, characterized in that: The first oil hole (3), the second oil hole (4) and the through hole (5) are all interconnected with the mounting cavity (2), and the centers of the first oil hole (3), the third oil hole (12) and the fourth oil hole (15) are all on the same horizontal line.

3. The silent shock absorber piston assembly according to claim 1, characterized in that: The locking bracket (6) comprises a cylinder (61), the surface of which is fixedly connected to the inner wall of the through hole (5), a conical hole (62) is provided on the surface of the cylinder (61), a conical column (63) is fitted on the inner wall of the cylinder (61) and the right side of the pressing column (16), a steel ball (64) is fitted on the surface of the conical column (63), the inner wall of the conical hole (62) and the inner wall of the annular groove (8), a cylinder (65) is fixedly connected to the right side of the conical column (63), and the surface of the cylinder (65) contacts the inner wall of the cylinder (61).

4. The silent shock absorber piston assembly according to claim 1, characterized in that: A sealing sleeve (17) is fitted on the surface of the piston body (1), and limit rings (18) are fitted on both left and right sides of the sealing sleeve (17), and the inner wall of the limit ring (18) is fixedly connected to the surface of the piston body (1).

5. The silent shock absorber piston assembly according to claim 4, characterized in that: A thread groove (19) is provided on the left side of the pressure plate (11), and a piston rod (20) is threadedly connected to the inner wall of the thread groove (19), and a first positioning hole (21) is provided inside the piston rod (20). Second positioning holes (22) are provided on the upper and lower sides of the piston body (1), and positioning columns (23) are fitted on the inner wall of the second positioning hole (22), the first positioning hole (21), the left side of the threaded tube (10) and the inner wall of the sealing sleeve (17).

6. The silent shock absorber piston assembly according to claim 5, characterized in that: The second positioning hole (22) is in communication with the installation cavity (2).

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