Hydraulic buffering inverted shock absorber

Abstract

The utility model discloses a hydraulic buffering inverted shock absorber which comprises an outer cylinder and an inner cylinder which extends into the outer cylinder in a sliding mode, a piston rod is arranged in the outer cylinder, a piston assembly is installed at the end of the piston rod, a working cylinder is arranged in the inner cylinder, and the piston assembly is matched with the working cylinder in a sliding mode. An inner cylinder seat is mounted at the end part of the working cylinder, a positioning assembly is mounted on the piston rod, an oil discharge gap is formed between the inner wall of the inner cylinder seat and the positioning assembly, and the oil discharge gap is used for buffering the flowing of hydraulic oil between the positioning assembly and the inner cylinder seat; and an oil discharge gap is formed between the positioning assembly and the inner wall of the inner cylinder base, internal hydraulic oil is controlled to discharge buffer acting force, and the damping stability of the whole damper is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a hydraulic buffer inverted shock absorber. Background Art

[0002] The inverted shock absorber of motorcycles is widely used in motorcycles. It supports the vehicle body and transmits traction, which is closely related to the safety of vehicle driving. At the same time, it is a performance part. The quality of the shock absorption effect will also affect the comfort of the driver and passengers. The structure of the existing inverted shock absorber mainly consists of an end cover, a piston-connecting rod assembly, a working cylinder, a bottom piston body, a shock absorbing spring, a front fork tube, a bushing, a sleeve and an inner cylinder seat. The piston-connecting rod assembly and the bottom piston body are assembled in the working cylinder to form a built-in damper to prevent other parts assembled on the connecting rod from loosening. The connecting rod is fixed to the piston by mechanical riveting, and the damping cylinder is filled with shock absorbing oil. When the motorcycle is running, the piston-connecting rod assembly moves up and down in the working cylinder, and the outer cylinder also moves up and down relative to the fork tube. Damping and shock absorption are achieved through the action of the built-in damper and the shock absorbing spring.

[0003] During shock absorption and buffering, the inner cylinder seat is limited by the positioning component on the support tube to determine the up and down movement distance. In the current structure, the positioning component and the inner cylinder seat are limited and have no hydraulic oil buffering effect. The hydraulic oil flows quickly and the shock absorption stability is poor. Utility Model Content

[0004] 1. Technical issues

[0005] The utility model aims to provide a hydraulic buffer inverted shock absorber, which controls the internal hydraulic oil discharge buffering force by setting an oil discharge gap between a positioning component and the inner wall of an inner cylinder seat, thereby further improving the shock absorbing stability of the entire shock absorber.

[0006] (II) Technical solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A hydraulic buffer inverted shock absorber comprises an outer cylinder and an inner cylinder which slides into the outer cylinder, a piston rod is arranged in the outer cylinder, a piston assembly is installed at the end of the piston rod, a working cylinder is arranged in the inner cylinder, and the piston assembly and the working cylinder are slidably matched; an inner cylinder seat is installed at the end of the working cylinder, a positioning assembly is installed on the piston rod, an oil discharge gap is provided between the inner wall of the inner cylinder seat and the positioning assembly, and the oil discharge gap is used to buffer the flow of hydraulic oil between the positioning assembly and the inner cylinder seat.

[0009] Preferably, a support tube is further provided in the inner tube, the working cylinder is slidably matched with the support tube, a first spring is sleeved on the working cylinder, and one end of the first spring abuts against the end of the support tube.

[0010] Preferably, a support tube is further provided in the inner cylinder, a first spring is sleeved on the piston rod, one end of the first spring abuts against the end of the support tube, and the other end of the first spring abuts against the inner cylinder seat.

[0011] Preferably, an inner conical surface is provided on one end of the inner cylinder seat facing the positioning assembly.

[0012] Preferably, the positioning assembly includes a positioning sleeve sleeved on the piston rod and a guide sleeve installed on the positioning sleeve, and the positioning sleeve is also provided with a sealing gasket and a sealing cover for pressing the guide sleeve; the positioning sleeve is provided with a bending portion, and the piston rod is provided with a limiting member for locking the bending portion.

[0013] Preferably, the sealing gasket is provided with a plurality of notches arranged along the circumferential direction.

[0014] Preferably, the piston assembly includes a second spring, a valve seat, an elastic gasket, a piston, a valve system and a locking nut which are sequentially installed at the end of the piston rod. An oil hole is provided on the piston, and the piston is slidably matched with the working cylinder.

[0015] Preferably, a sliding sealing seat is installed at the end of the outer cylinder, and the inner cylinder is sealingly matched with the sliding sealing seat.

[0016] (III) Beneficial effects

[0017] By setting an oil discharge gap between the inner wall of the inner cylinder seat and the positioning assembly, when the inner cylinder seat is carried by the working cylinder to slide relative to the piston rod, the hydraulic oil flowing from the piston assembly into the inner cylinder seat is restricted by the oil discharge gap, so that the internal hydraulic oil flows out slowly to achieve sliding buffering of the inner cylinder seat, further improving the stability of the damping force of the hydraulic oil on the first damping tube, making the shock absorption process smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0020] Figure 3 for Figure 1 A schematic diagram of the partially enlarged structure at B in the middle;

[0021] Figure 4This is a schematic structural diagram of a second embodiment of the utility model;

[0022] Figure 5 for Figure 4 A schematic diagram of the partially enlarged structure at C in the middle;

[0023] Figure 6 for Figure 4 The schematic diagram of the local enlarged structure at D in the middle;

[0024] Figure 7 It is a side structural schematic diagram of the piston assembly in the utility model;

[0025] exist Figures 1 to 7 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0026] Outer tube 1, inner tube 2, piston rod 3, piston assembly 4, second spring 41, valve seat 42, elastic gasket 43, piston 44, valve system 45, locking nut 46, working cylinder 5, inner tube seat 6, inner cone 60, positioning assembly 7, positioning sleeve 71, guide sleeve 72, sealing gasket 73, sealing cover 74, bending part 75, limit piece 76, notch 77, support tube 8, first spring 9, sliding sealing seat 10. 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] See also Figure 1-Figure 7 As shown, in the embodiment of the utility model, a hydraulic buffer inverted shock absorber is proposed, including an outer cylinder 1 and an inner cylinder 2 slidingly extending into the outer cylinder 1, a piston rod 3 is arranged in the outer cylinder 1, a piston assembly 4 is installed at the end of the piston rod 3, a working cylinder 5 is arranged in the inner cylinder 2, and the piston assembly 4 and the working cylinder 5 are slidably matched; during compression, the outer cylinder 1 and the inner cylinder 2 are slidably sealed, and the piston assembly 4 and the working cylinder 5 are also slidably matched, and the hydraulic pressure flows from the side of the working cylinder 5 to the side of the piston rod 3 through the piston assembly 4 and generates a damping force. At the same time, an inner cylinder seat 6 is installed at the end of the working cylinder 5, and a positioning component 7 is installed on the piston rod 3. An oil discharge gap is provided between the inner wall of the inner cylinder seat 6 and the positioning component 7. The oil discharge gap is used to buffer the flow of hydraulic oil between the positioning component 7 and the inner cylinder seat 6. The sliding distance of the inner cylinder seat 6 is limited by the positioning component 7. At the same time, when the positioning component 7 cooperates with the inner cylinder seat 6, the oil discharge gap is used to reduce the flow speed of the internal hydraulic oil, and the slow flow of the hydraulic oil is further used to form a buffering force, so that the sliding buffering process achieved by the hydraulic oil is smoother, that is, the entire shock absorbing action process is smoother, thereby improving the riding comfort of the vehicle.

[0029] Among them, adjusting the oil discharge clearance can adjust the hydraulic oil buffer flow rate.

[0030] When the working cylinder 5 slides relative to the piston rod 3, in addition to using hydraulic oil for vibration reduction and buffering, spring force can also be used for buffering. In one embodiment, Figure 1 As shown, a support tube 8 is further provided in the inner tube 2, and the working cylinder 5 is slidably matched with the support tube 8. A first spring 9 is sleeved on the working cylinder 5, and one end of the first spring 9 abuts against the end of the support tube 8. After the working cylinder 5 slides, the first spring 9 generates a compressive elastic force between the support tube 8 and the inner tube 2, which buffers the sliding process of the working cylinder 5, and combines with the internal hydraulic oil buffer to achieve a shock absorbing effect.

[0031] In another embodiment, if Figure 4 As shown, a support tube 8 is further provided in the inner tube 2, and a first spring 9 is sleeved on the piston rod 3, one end of the first spring 9 abuts against the end of the support tube 8, and the other end of the first spring 9 abuts against the inner tube seat 6. In this manner, a compressive elastic force is directly generated on the inner tube seat 6 by the first spring 9, that is, the working cylinder 5 does not extend into the support tube 8, and the length of the support tube 8 is used to form a compression length limit of the first spring 9, thereby achieving a shock absorbing effect in combination with the internal hydraulic oil.

[0032] Specifically, in the structure of the shock absorber, the first spring 9 can be arranged in either of the two ways mentioned above.

[0033] At the same time, in order to provide a guiding function for the inner cylinder seat 6 when it slides and contacts the positioning assembly 7, an inner conical surface 60 is provided on one end of the inner cylinder seat 6 facing the positioning assembly 7, and the guiding function of the inner conical surface 60 is used to achieve relative sliding fit guidance.

[0034] Specifically, the positioning assembly 7 includes a positioning sleeve 71 sleeved on the piston rod 3 and a guide sleeve 72 installed on the positioning sleeve 71. The positioning sleeve 71 is also provided with a sealing gasket 73 and a sealing cover 74 for pressing the guide sleeve 72. The guide sleeve 72 can be disassembled and replaced relative to the positioning sleeve 71, so that the outer diameter of the guide sleeve 72 can be adjusted and the oil discharge gap can be adjusted. The sealing gasket 73 and the sealing cover 74 can reliably fix the guide sleeve 72 on the positioning sleeve 71. At the same time, a bending portion 75 is provided on the positioning sleeve 71, and a limiting member 76 for locking the bending portion 75 is provided on the piston rod 3. The entire positioning assembly 7 is fixed to the piston rod 3 through the cooperation of the bending portion 75 and the limiting member 76.

[0035] The sealing gasket 73 is provided with a plurality of notches 77 arranged along the circumferential direction to prevent the sealing gasket 73 from generating resistance to the flow of hydraulic oil. The plurality of notches 77 are provided to allow the sealing gasket 73 to present a petal-shaped structure and eliminate the pull-out noise during restoration.

[0036] Specifically, the piston assembly 4 is used to control the flow of hydraulic oil between the working cylinder 5 and the piston rod 3, wherein the piston assembly 4 includes a second spring 41, a valve seat 42, an elastic gasket 43, a piston 44, a valve system 45 and a locking nut 46 which are sequentially installed at the end of the piston rod 3. An oil hole is opened on the piston 44, and the piston 44 is slidably matched with the working cylinder 5. The hydraulic oil flowing from the working cylinder 5 to the piston rod 3 side flows through the valve system 45 and the oil hole to generate a hydraulic damping force. During resetting, the hydraulic oil flowing from the piston rod 3 side to the working cylinder 5 side directly passes through the oil hole without generating a damping force, thereby achieving a stable hydraulic buffering and a fast resetting damping action.

[0037] The outer cylinder 1 and the inner cylinder 2 must also be sealed when they slide relative to each other. Specifically, a sliding sealing seat 10 is installed at the end of the outer cylinder 1, and the inner cylinder 2 is sealed with the sliding sealing seat 10. The sliding sealing seat 10 can achieve sealing during the sliding process of the inner cylinder 2, and the sliding sealing seat 10 can adopt existing mature products.

[0038] It should be noted that the other components of the shock absorber are all existing structures and can be included by default. In this embodiment, the conventional components of the shock absorber are not described again.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A hydraulic buffer inverted shock absorber, characterized in that: It comprises an outer cylinder and an inner cylinder which slides into the outer cylinder, a piston rod is arranged in the outer cylinder, a piston assembly is installed at the end of the piston rod, a working cylinder is arranged in the inner cylinder, and the piston assembly is slidably matched with the working cylinder; An inner cylinder seat is installed at the end of the working cylinder, a positioning assembly is installed on the piston rod, and an oil discharge gap is provided between the inner wall of the inner cylinder seat and the positioning assembly, and the oil discharge gap is used to buffer the flow of hydraulic oil between the positioning assembly and the inner cylinder seat.

2. A hydraulic buffer inverted shock absorber according to claim 1, characterized in that: A support tube is also arranged in the inner tube, the working cylinder is slidably matched with the support tube, a first spring is sleeved on the working cylinder, and one end of the first spring abuts against the end of the support tube.

3. The hydraulic buffer inverted shock absorber according to claim 1, characterized in that: A support tube is also provided in the inner tube, and a first spring is sleeved on the piston rod. One end of the first spring abuts against the end of the support tube, and the other end of the first spring abuts against the inner tube seat.

4. A hydraulic buffer inverted shock absorber according to claim 2 or 3, characterized in that: An inner conical surface is provided on one end of the inner cylinder seat facing the positioning assembly.

5. The hydraulic buffer inverted shock absorber according to claim 4, characterized in that: The positioning assembly comprises a positioning sleeve sleeved on the piston rod and a guide sleeve installed on the positioning sleeve, and the positioning sleeve is also provided with a sealing gasket and a sealing cover for pressing the guide sleeve; The positioning sleeve is provided with a bending portion, and the piston rod is provided with a limiting piece for locking the bending portion.

6. The hydraulic buffer inverted shock absorber according to claim 5, characterized in that: The sealing gasket is provided with a plurality of notches arranged along the circumferential direction.

7. The hydraulic buffer inverted shock absorber according to claim 4, characterized in that: The piston assembly comprises a second spring, a valve seat, an elastic gasket, a piston, a valve system and a locking nut which are sequentially installed at the end of the piston rod. An oil hole is provided on the piston, and the piston is slidably matched with the working cylinder.

8. The hydraulic buffer inverted shock absorber according to claim 4, characterized in that: A sliding sealing seat is installed at the end of the outer cylinder, and the inner cylinder is sealingly matched with the sliding sealing seat.

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