Shock absorber

Abstract

According to the shock absorber, a liquid storage cavity and a gas storage cavity are formed in an installation base, the liquid storage cavity and the gas storage cavity are separated through a deformation piece, damping liquid is stored in the liquid storage cavity, gas is stored in the gas storage cavity, and when a piston rod drives a piston to slide in the liquid storage cavity due to impulsive force, the liquid storage cavity is separated from the gas storage cavity; when the damping fluid in the fluid storage cavity receives impulsive force from the piston, the deformation piece can deform under the condition, so that part of the impulsive force received by the damping fluid can be borne by gas in the gas storage cavity, the impulsive force borne by the cavity wall of the fluid storage cavity in a short time is reduced, the cavity wall of the fluid storage cavity is protected, and the service life of the damping fluid is prolonged. Therefore, the service life of the shock absorber is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbing devices, in particular to a shock absorber. Background Art

[0002] Shock absorbers are generally installed on the vehicle body and are used to absorb the impact of the up and down vibrations generated by the vehicle body as it moves forward due to bumps on the road.

[0003] In the related technology, a liquid storage chamber for storing damping fluid is formed inside the shock absorber, and a piston is slidably provided in the liquid storage chamber. The piston divides the liquid storage chamber into a first sub-chamber and a second sub-chamber. A liquid passage connecting the first sub-chamber and the second sub-chamber is provided on the piston. When the piston slides in the liquid storage chamber due to an impact, the damping fluid will flow between the first sub-chamber and the second sub-chamber. The damping force generated by the flow of the damping fluid consumes the impact force received by the piston, thereby achieving the purpose of buffering and shock absorption.

[0004] However, when the piston is subjected to a large impact force, these impact forces are difficult to consume in a short period of time, so that the cavity wall of the liquid storage cavity will be subjected to a large pressure in a short period of time, which can easily cause damage to the shock absorber and affect the service life of the shock absorber. Utility Model Content

[0005] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and the present invention provides a shock absorber with a longer service life.

[0006] The shock absorber provided according to the embodiment of the utility model includes a mounting seat and a movable seat; a liquid storage chamber and an air storage chamber are formed inside the mounting seat, and the liquid storage chamber and the air storage chamber are separated by a deformation plate, the liquid storage chamber stores damping liquid, and the air storage chamber stores gas; the movable seat includes a piston rod and a piston, the piston is slidably arranged in the liquid storage chamber, and divides the liquid storage chamber into a first sub-chamber and a second sub-chamber, the piston includes a piston body and a flexible barrier ring, the flexible barrier ring is arranged between the piston body and the cavity wall of the liquid storage chamber, and separates the piston body from the cavity wall of the liquid storage chamber, the piston body is provided with a liquid passage connecting the first sub-chamber and the second sub-chamber, one end of the piston rod is connected to the piston body, and the other end of the piston rod extends out of the liquid storage chamber.

[0007] The shock absorber described in the present invention has at least the following beneficial effects: in the shock absorber of the present application, a liquid storage chamber and an air storage chamber are formed inside the mounting seat, and the liquid storage chamber and the air storage chamber are separated by a deformable plate. Damping liquid is stored in the liquid storage chamber, and gas is stored in the air storage chamber. When the piston rod drives the piston to slide in the liquid storage chamber due to an impact, the damping liquid in the liquid storage chamber will receive the impact from the piston. In this case, the deformable plate can be deformed so that part of the impact received by the damping fluid can be borne by the gas in the air storage chamber, thereby reducing the impact that the cavity wall of the liquid storage chamber bears in a short period of time, so as to protect the cavity wall of the liquid storage chamber and thereby extend the service life of the shock absorber.

[0008] According to the shock absorber described in the embodiment of the present invention, the mounting seat includes a cylinder and a first connecting member, the cylinder and the first connecting member are detachably connected, the deformation plate is clamped between the cylinder and the first connecting member, the deformation plate and the cylinder together define a liquid storage chamber, and the deformation plate and the first connecting member together define an air storage chamber.

[0009] According to the shock absorber described in the embodiment of the present invention, the outer wall of the cylinder is provided with a first external thread, the first connecting member is provided with a first internal thread adapted to the first external thread, and the cylinder and the first connecting member are threadedly connected via the first external thread and the first internal thread.

[0010] According to the shock absorber described in the embodiment of the present invention, the piston rod passes through the first sub-cavity and is connected to the piston body. The deformation plate includes a clamping portion and a deformation portion. The clamping portion is arranged around the deformation portion. The opposite ends of the clamping portion are respectively in contact with the cylinder and the first connecting piece. The deformation portion is an arc shape protruding toward the second sub-cavity.

[0011] According to the shock absorber described in the embodiment of the present invention, it also includes an elastic buffer member, a first connecting block is provided on the mounting seat, a second connecting block is provided at the end of the piston rod away from the mounting seat, and the opposite ends of the elastic buffer member are respectively connected to the first connecting block and the second connecting block.

[0012] According to the shock absorber described in the embodiment of the present invention, the position of the first connecting block is adjustably arranged on the mounting seat along the extending direction of the piston rod.

[0013] According to the shock absorber described in an embodiment of the present invention, the mounting seat is provided with a second external thread extending spirally along the extension direction of the piston rod, the first connecting block is provided with a second internal thread adapted to the second external thread, and the first connecting block is threadably sleeved on the mounting seat through the second external thread and the second internal thread.

[0014] According to the shock absorber described in the embodiment of the present invention, a through hole connecting the liquid storage chamber and the outside is provided on the mounting seat, the piston rod passes through the through hole, and a sealing ring is provided between the hole wall of the through hole and the piston rod.

[0015] According to the shock absorber described in the embodiment of the utility model, it also includes a limiting member, the hole wall of the through hole is provided with a receiving groove, the sealing ring is limited in the receiving groove, the groove wall of the receiving groove is provided with a notch that allows the sealing ring to detach from the receiving groove, the limiting member is detachably connected to the mounting seat, and the notch is closed.

[0016] According to the shock absorber described in the embodiment of the present invention, the mounting seat is provided with a third external thread, the limiting member is provided with a third internal thread adapted to the third external thread, and the limiting member is threadably sleeved on the mounting seat through the third external thread and the third internal thread.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a schematic structural diagram of a shock absorber according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 a cross-sectional view of the shock absorber shown;

[0021] Figure 3 for Figure 2 A partial enlarged view of the structure at point A of the shock absorber shown.

[0022] Reference numerals:

[0023] Mounting base 100; liquid storage chamber 101; first sub-chamber 101a; second sub-chamber 101b; gas storage chamber 102; deformable plate 110; clamping portion 111; deformable portion 112; cylinder 120; receiving groove 121; notch 121a; first connecting member 130; first connecting hole 131; sealing ring 140; first connecting block 150;

[0024] Movable seat 200; piston rod 210; piston 220; piston body 221; flexible barrier ring 222; second connecting block 230; second connecting member 240; second connecting hole 241;

[0025] elastic buffer 300;

[0026] Limiting member 400. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0029] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Reference below Figures 1 to 3 The shock absorber of the present application is described in detail.

[0032] refer to Figure 1 The shock absorber according to the embodiment of the present invention includes a mounting seat 100 and a movable seat 200 .

[0033] For example, Figure 1 and Figure 2As shown, a liquid storage chamber 101 and an air storage chamber 102 are formed inside the mounting seat 100, and the liquid storage chamber 101 and the air storage chamber 102 are separated by a deformation plate 110. The liquid storage chamber 101 stores damping liquid, and the air storage chamber 102 stores gas; the movable seat 200 includes a piston rod 210 and a piston rod 220. The piston rod 220 is slidably arranged in the liquid storage chamber 101 and divides the liquid storage chamber 101 into a first sub-chamber 101a and a second sub-chamber 101. b. The piston rod 220 includes a piston body 221 and a flexible barrier ring 222. The flexible barrier ring 222 is arranged between the piston body 221 and the wall of the liquid storage chamber 101, and separates the piston body 221 and the wall of the liquid storage chamber 101. The piston body 221 is provided with a liquid passage connecting the first sub-chamber 101a and the second sub-chamber 101b. One end of the piston rod 210 is connected to the piston body 221, and the other end of the piston rod 210 extends out of the liquid storage chamber 101.

[0034] In the shock absorber of the present invention, when the piston rod 210 is subjected to an impact in the vertical direction, the piston rod 210 can drive the piston rod 220 to slide in the liquid storage chamber 101 along the vertical direction, so that the damping fluid in the liquid storage chamber 101 can flow between the first sub-chamber 101a and the second sub-chamber 101b, and in the process of the damping fluid passing through the liquid channel on the piston body 221, the impact force received by the piston rod 220 can be converted into heat, so that the shock absorber can achieve the effect of shock absorption.

[0035] It should be noted that at the moment when the piston rod 210 is subjected to impact, the piston rod 210 will suddenly apply a certain pressure to the damping fluid through the piston rod 220, so that the cavity wall of the liquid storage chamber 101 will be subjected to a large pressure from the damping fluid in a short period of time, thereby causing damage to the liquid storage chamber 101 and affecting the service life of the shock absorber.

[0036] In the shock absorber of the present invention, since an air storage chamber 102 is also formed inside the mounting seat 100, the air storage chamber 102 and the liquid storage chamber 101 are separated by a deformable plate 110. When the damping liquid in the liquid storage chamber 101 is subjected to a large impact force in a short period of time, part of the impact force can be transmitted to the gas in the air storage chamber 102 through the deformable plate 110, thereby reducing the impact force on the cavity wall of the liquid storage chamber 101, and further protecting the liquid storage chamber 101, so as to extend the service life of the shock absorber of the present invention.

[0037] It can be understood that since the piston rod 220 includes a piston body 221 and a flexible barrier ring 222, and the flexible barrier ring 222 is arranged between the piston body 221 and the cavity wall of the liquid storage chamber 101, and separates the piston body 221 and the cavity wall of the liquid storage chamber 101, the flexible barrier ring 222 can protect the piston body 221 and the cavity wall of the liquid storage chamber 101, so as to reduce the wear of the piston body 221 and the cavity wall of the liquid storage chamber 101.

[0038] In a specific embodiment of the present invention, the flexible barrier ring 222 is a rubber gasket.

[0039] In some embodiments of the present invention, the mounting base 100 includes a cylinder 120 and a first connecting member 130, the cylinder 120 and the first connecting member 130 are detachably connected, the deformation piece 110 is clamped between the cylinder 120 and the first connecting member 130, the deformation piece 110 and the cylinder 120 jointly define a liquid storage chamber 101, and the deformation piece 110 and the first connecting member 130 jointly define an air storage chamber 102.

[0040] For example, Figure 2 As shown, the mounting base 100 includes a cylinder 120 and a first connecting member 130. The first connecting member 130 is located above the cylinder 120 and is detachably connected to the upper end of the cylinder 120. The deformation piece 110 is clamped between the first connecting member 130 and the cylinder 120. The first connecting member 130 and the deformation piece 110 jointly define the air storage chamber 102, and the cylinder 120 and the deformation piece 110 jointly define the liquid storage chamber 101.

[0041] It can be understood that since the first connecting member 130 is detachably connected to the cylinder 120, and the deformation plate 110 is clamped between the first connecting member 130 and the cylinder 120, the staff can achieve the connection or disassembly between the first connecting member 130 and the cylinder 120, thereby achieving the connection or disassembly between the first connecting member 130, the cylinder 120 and the deformation plate 110, and the structure of the entire shock absorber is simpler and more compact.

[0042] In a further embodiment of the present invention, the outer wall of the cylinder 120 is provided with a first external thread, and the first connecting member 130 is provided with a first internal thread adapted to the first external thread. The cylinder 120 and the first connecting member 130 are threadedly connected via the first external thread and the first internal thread.

[0043] It can be understood that, since the cylinder 120 and the first connecting member 130 are connected by threads, the connection between the cylinder 120 and the first connecting member 130 is simpler and has a higher connection strength.

[0044] In some embodiments of the present invention, the piston rod 210 passes through the first sub-cavity 101a and is connected to the piston body 221. The deformation piece 110 includes a clamping portion 111 and a deformation portion 112. The clamping portion 111 is arranged around the deformation portion 112. The opposite ends of the clamping portion 111 are respectively in contact with the cylinder 120 and the first connecting member 130. The deformation portion 112 is an arc shape that protrudes toward the second sub-cavity 101b.

[0045] For example, Figure 2As shown, the first sub-cavity 101a is located below the second sub-cavity 101b, the piston rod 210 extends in the vertical direction, and the piston rod 210 passes through the first sub-cavity 101a and is connected to the lower end of the piston body 221. The deformation piece 110 is arranged above the second sub-cavity 101b, and the deformation piece 110 includes a deformation part 112 and a clamping part 111. The clamping part 111 is arranged around the deformation part 112, and the upper and lower ends of the clamping part 111 are respectively abutted against the first connecting member 130 and the cylinder 120. The deformation part 112 constitutes the upper cavity wall of the second sub-cavity 101b, and the deformation part 112 is an arc shape protruding toward the second sub-cavity 101b.

[0046] It should be noted that when the piston rod 210 is subjected to an impact force and pushes the piston rod 220 to move upward, the damping fluid in the second sub-chamber 101b is subjected to pressure. At this time, the deformation part 112 can deform upward to squeeze the gas in the air storage chamber 102, thereby bearing part of the pressure applied by the piston rod 220 to the damping fluid in the second sub-chamber 101b.

[0047] It can be understood that by setting the deformable portion 112 into a circular arc shape protruding toward the second sub-cavity 101b, the deformable portion 112 can be more easily deformed after receiving the impact from the second sub-cavity 101b, so as to squeeze the gas in the air storage cavity 102, so as to absorb the impact borne by the damping fluid in the second sub-cavity 101b through the compression of the gas in the air storage cavity 102.

[0048] In some embodiments of the present invention, the shock absorber also includes an elastic buffer 300, a first connecting block 150 is provided on the mounting seat 100, a second connecting block 230 is provided at the end of the piston rod 210 away from the mounting seat 100, and the opposite ends of the elastic buffer 300 are respectively connected to the first connecting block 150 and the second connecting block 230.

[0049] For example, Figure 1 and Figure 2 As shown, the elastic buffer 300 is a spring, which extends in the vertical direction. A first connecting block 150 is provided on the mounting seat 100, and the first connecting block 150 is provided on the cylinder 120. A second connecting block 230 is provided at the lower end of the piston rod 210, and the upper and lower ends of the spring are respectively connected to the first connecting block 150 and the second connecting block 230.

[0050] Furthermore, when the piston rod 220 is subjected to a vertical impact, the piston rod 210 will drive the piston rod 220 to move upward relative to the mounting seat 100. During this process, the spring is compressed to absorb part of the impact exerted on the piston rod 210, thereby enabling the spring to play a buffering role.

[0051] It should be noted that when the shock absorber of the present invention is applied to different scenarios, the requirements for the buffering capacity of the spring in the shock absorber are also different.

[0052] In order to adjust the buffering capacity of the elastic buffer member 300 in the shock absorber of the present invention, in a further embodiment of the present invention, the first connecting block 150 is adjustably arranged on the mounting seat 100 along the extension direction of the piston rod 210.

[0053] It can be understood that, along the extension direction of the piston rod 210, since the position of the first connecting block 150 is adjustably arranged on the mounting seat 100, the staff can adjust the relative position between the first connecting block 150 and the second connecting block 230 along the extension direction of the piston rod 210 according to actual needs, so as to achieve the adjustment of the initial elastic force of the elastic buffer 300, thereby achieving the adjustment of the buffering capacity of the elastic buffer 300 of the shock absorber of the utility model.

[0054] In order to achieve the adjustable position of the first connecting block 150 on the mounting base 100, in a specific embodiment of the present utility model, the mounting base 100 is provided with a second external thread spirally extending along the extension direction of the piston rod 210, and the first connecting block 150 is provided with a second internal thread adapted to the second external thread. The first connecting block 150 is threadedly sleeved on the mounting base 100 through the second external thread and the second internal thread.

[0055] Furthermore, by rotating the first connecting block 150 , the staff can move the first connecting block 150 along the extension direction of the piston rod 210 , thereby adjusting the relative position between the first connecting block 150 and the second connecting block 230 .

[0056] In some embodiments of the present invention, reference Figure 2 The mounting seat 100 is provided with an insertion hole connecting the liquid storage chamber 101 and the outside world, the piston rod 210 passes through the insertion hole, and a sealing ring 140 is provided between the hole wall of the insertion hole and the piston rod 210.

[0057] It is understandable that by providing a sealing ring 140 between the hole wall of the through hole and the piston rod 210, the sealing performance of the liquid storage chamber 101 can be increased, thereby increasing the difficulty of the damping fluid in the liquid storage chamber 101 flowing out of the through hole.

[0058] In order to realize the installation of the sealing ring 140 between the hole wall of the through hole and the piston rod 210, in a further embodiment of the present utility model, reference is made to Figure 2 and Figure 3 The hole wall of the through hole is provided with a receiving groove 121 , and the sealing ring 140 is limited in the receiving groove 121 .

[0059] In order to facilitate the installation of the sealing ring 140 in the receiving groove 121, or the removal of the sealing ring 140 from the receiving groove 121, in some embodiments of the present invention, reference is made to Figure 2 and Figure 3 The shock absorber further includes a limiting member 400. The groove wall of the accommodating groove 121 is provided with a notch 121a that allows the sealing ring 140 to be separated from the accommodating groove 121. The limiting member 400 is detachably connected to the mounting seat 100 and closes the notch 121a.

[0060] It is understandable that when it is necessary to install the sealing ring 140 in the receiving groove 121, the staff can remove the limiting member 400 from the mounting seat 100 to open the gap 121a. At this time, the staff can smoothly install the sealing ring 140 into the receiving groove 121; correspondingly, when it is necessary to remove the sealing ring 140 in the receiving groove 121, the staff can remove the limiting member 400 from the mounting seat 100 to open the gap 121a. At this time, the staff can smoothly remove the sealing ring 140 in the receiving groove 121.

[0061] Specifically, the insertion hole is provided on the cylinder 120 , and the limiting member 400 is detachably connected to the cylinder 120 .

[0062] In some embodiments of the present invention, in order to achieve a detachable connection between the limit member 400 and the mounting base 100, a third external thread is provided on the mounting base 100, and a third internal thread is provided on the limit member 400 that is compatible with the third external thread. The limit member 400 is threadedly mounted on the mounting base 100 through the third external thread and the third internal thread.

[0063] Furthermore, the staff can install or remove the limiting member 400 on the mounting base 100 by rotating the limiting member 400 in a forward or reverse direction relative to the mounting base 100 .

[0064] In some embodiments of the present invention, reference Figure 2 and Figure 3 A second connecting member 240 is also installed on the piston rod 210, and the second connecting member 240 is threadedly connected to the piston rod 210. The first connecting member 130 and the second connecting member 240 are respectively provided with a first connecting hole 131 and a second connecting hole 241 for connecting with other structures.

[0065] It can be understood that when the shock absorber of the present invention is working, the first connecting hole 131 and the second connecting hole 241 can be respectively connected to two structures that need to be shock-absorbed.

[0066] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A shock absorber, characterized in that: include: A mounting seat, wherein a liquid storage cavity and an air storage cavity are formed inside the mounting seat, the liquid storage cavity and the air storage cavity are separated by a deformation plate, the liquid storage cavity stores damping liquid, and the air storage cavity stores gas; The movable seat includes a piston rod and a piston. The piston is slidably arranged in the liquid storage chamber and divides the liquid storage chamber into a first sub-chamber and a second sub-chamber. The piston includes a piston body and a flexible barrier ring. The flexible barrier ring is arranged between the piston body and the cavity wall of the liquid storage chamber and separates the piston body from the cavity wall of the liquid storage chamber. The piston body is provided with a liquid passage connecting the first sub-chamber and the second sub-chamber. One end of the piston rod is connected to the piston body, and the other end of the piston rod extends out of the liquid storage chamber.

2. A shock absorber according to claim 1, characterized in that: The mounting seat includes a cylinder and a first connecting member, the cylinder and the first connecting member are detachably connected, the deformable sheet is clamped between the cylinder and the first connecting member, the deformable sheet and the cylinder together define the liquid storage cavity, and the deformable sheet and the first connecting member together define the air storage cavity.

3. A shock absorber according to claim 2, characterized in that: The outer wall of the cylinder is provided with a first external thread, the first connecting member is provided with a first internal thread adapted to the first external thread, and the cylinder and the first connecting member are threadedly connected via the first external thread and the first internal thread.

4. A shock absorber according to claim 2, characterized in that: The piston rod passes through the first sub-cavity and is connected to the piston body. The deformation piece includes a clamping portion and a deformation portion. The clamping portion is arranged around the deformation portion. The opposite ends of the clamping portion are respectively in contact with the cylinder and the first connecting member. The deformation portion is an arc shape protruding toward the second sub-cavity.

5. The shock absorber according to claim 1, characterized in that: Also includes elastic buffer parts, The mounting seat is provided with a first connecting block, the end of the piston rod away from the mounting seat is provided with a second connecting block, and the opposite ends of the elastic buffer are respectively connected to the first connecting block and the second connecting block.

6. A shock absorber according to claim 5, characterized in that: Along the extending direction of the piston rod, the first connecting block is adjustably arranged on the mounting seat.

7. The shock absorber according to claim 6, characterized in that: The mounting seat is provided with a second external thread spirally extending along the extension direction of the piston rod, and the first connecting block is provided with a second internal thread adapted to the second external thread. The first connecting block is threadably sleeved on the mounting seat through the second external thread and the second internal thread.

8. The shock absorber according to claim 1, characterized in that: The mounting seat is provided with an insertion hole communicating with the liquid storage cavity and the outside world, the piston rod passes through the insertion hole, and a sealing ring is provided between the hole wall of the insertion hole and the piston rod.

9. The shock absorber according to claim 8, characterized in that: It also includes a limiting member, the hole wall of the through hole is provided with a receiving groove, the sealing ring is limited in the receiving groove, the groove wall of the receiving groove is provided with a notch allowing the sealing ring to detach from the receiving groove, the limiting member is detachably connected to the mounting seat and closes the notch.

10. The shock absorber according to claim 9, characterized in that: The mounting seat is provided with a third external thread, the limiting member is provided with a third internal thread matched with the third external thread, and the limiting member is threadably sleeved on the mounting seat through the third external thread and the third internal thread.

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