A shock absorber that eliminates abnormal noise

Abstract

The utility model discloses a kind of shock absorbers of eliminating abnormal sound, including front fork tube assembly, bottom cylinder and positioning pipe, the front fork tube assembly inserts the bottom cylinder, the one end of the positioning pipe inserted in the front fork tube assembly is equipped with piston assembly, the first buffer spring of abutting at the end of the positioning pipe is equipped in the front fork tube assembly, the second buffer spring of abutting the piston assembly is equipped on the positioning pipe, and damping hole for communicating inside is opened in the positioning pipe;The end of the positioning pipe is installed for increasing the valve body of damping, the valve body communicates the positioning pipe with the front fork tube assembly;When the road section of larger shock absorbing stroke is driven, the damping force generated cannot meet the whole vehicle depression speed, and the relative sliding distance of positioning pipe is longer, and the abnormal sound generated in the process of depression and bottom touch is caused.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber technology, and in particular to a shock absorber for eliminating abnormal noise. Background Technology

[0002] Shock absorbers, as the most crucial component of a vehicle, are used to suppress the oscillations caused by the rebound of the springs after absorbing shocks, as well as impacts from the road surface. When driving over uneven roads, although the shock-absorbing springs can filter out road vibrations, the springs themselves will still have reciprocating motion. The shock absorber is used to suppress this spring bounce. If the shock absorber is too soft, the vehicle body will bounce up and down; if the shock absorber is too stiff, it will create too much resistance, hindering the normal operation of the springs. Thus, the shock absorber effectively avoids shocks during vehicle operation.

[0003] The damping adjustment of the shock absorber is mainly achieved by adjusting the flow of internal hydraulic oil. Current shock absorbers use small holes on the positioning tube and piston assembly to allow hydraulic oil in the high-pressure oil chamber to enter the low-pressure oil chamber to generate damping. When the road is severely bumpy, the positioning tube slides a relatively long distance, which may cause abnormal noise during the compression process and when bottoming out. This is because the damping force generated during rapid shock absorption cannot meet the compression speed of the whole vehicle, and the hydraulic oil flow speed is too fast. Utility Model Content

[0004] (a) Technical issues

[0005] The purpose of this utility model is to provide a shock absorber that eliminates abnormal noise, and to solve the problem in the prior art that when driving on roads with high frequency and low amplitude vibration and large potholes, the damping force generated cannot meet the vehicle's downward speed, resulting in a relatively long sliding distance of the positioning tube, which causes abnormal noise during the downward process and when hitting the bottom.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A shock absorber for eliminating abnormal noise includes a fork tube assembly, a bottom tube, and a positioning tube. The fork tube assembly is inserted into the bottom tube. A piston assembly is provided at one end of the positioning tube inserted into the fork tube assembly. A first buffer spring is provided inside the fork tube assembly, abutting against the end of the positioning tube. A second buffer spring is sleeved on the positioning tube, abutting against the piston assembly. A damping hole communicating with the interior is opened on the positioning tube. A valve body for increasing damping is installed at the end of the positioning tube, and the valve body connects the positioning tube and the fork tube assembly.

[0009] Preferably, the valve body includes a valve seat threaded to the end of the positioning tube, and the valve seat has a stepped hole, the small hole of which is located on one side of the positioning tube.

[0010] Preferably, the valve body includes a sliding seat embedded at the end of the positioning tube, and the end of the positioning tube is threadedly connected to a clamping ring for pressing the sliding seat; the sliding seat has a first through hole, an adjusting seat is floatingly installed inside the sliding seat, the adjusting seat has a second through hole, the adjusting seat has notches spaced around the second through hole, and a third buffer spring for pushing the adjusting seat is provided inside the sliding seat.

[0011] Preferably, the fork tube assembly includes a fork tube and a sealing end fixed on the fork tube, the fork tube is provided with a limiting tube and a limiting ring abutting against the limiting tube, and the first buffer spring abuts against the limiting ring.

[0012] Preferably, the end of the positioning tube is provided with a first sealing ring that mates with the inner wall of the fork tube.

[0013] Preferably, a sliding sealing seat is installed at the end of the bottom tube, and the fork tube is sealed to the sliding sealing seat.

[0014] Preferably, the fork tube is equipped with a sliding ring, which slides in contact with the inner wall of the bottom tube.

[0015] (III) Beneficial Effects

[0016] By adding a valve body to the end of the positioning tube, the damping of the hydraulic oil flowing from the positioning tube to the fork tube assembly is further enhanced. This creates a situation where damping force is generated simultaneously at three locations: the damping orifice, the piston assembly, and the valve body. When driving on roads with high-frequency, low-amplitude vibrations and large potholes, the damping force generated by the valve body further buffers the sliding of the positioning tube, thereby preventing the positioning tube from sliding too far and bottoming out. It also effectively avoids the risk of abnormal noise during the downward pressure and when bottoming out. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0018] Figure 2 for Figure 1 A magnified view of the structure at point A in the middle;

[0019] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0020] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0021] exist Figures 1 to 4The correspondence between component names or lines and drawing numbers is as follows:

[0022] Front fork tube assembly 1, front fork tube 101, sealing end 102, limiting ring 103, limiting tube 104, bottom tube 2, positioning tube 3, piston assembly 4, first buffer spring 5, second buffer spring 6, damping hole 7, valve body 8, valve seat 9, stepped hole 90, sliding seat 10, clamping ring 11, first through hole 12, adjusting seat 13, second through hole 14, notch structure 15, third buffer spring 16, first sealing ring 17, sliding sealing seat 18, sliding ring 19. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] See Figures 1-4 As shown in the embodiment of this utility model, a shock absorber for eliminating abnormal noise is proposed, including a fork tube assembly 1, a bottom cylinder 2, and a positioning tube 3. The fork tube assembly 1 is inserted into the bottom cylinder 2. A piston assembly 4 is provided at one end of the positioning tube 3 inserted into the fork tube assembly 1. A first buffer spring 5 is provided inside the fork tube assembly 1, abutting against the end of the positioning tube 3. A second buffer spring 6 is sleeved on the positioning tube 3, abutting against the piston assembly 4. A damping hole 7 communicating with the interior is opened on the positioning tube 3. Under normal operating conditions, the bottom cylinder 2 and the fork tube assembly 1 are filled with hydraulic oil. During the shock absorption process, the hydraulic oil on one side of the bottom cylinder 2 is squeezed and the pressure increases. Part of it enters the front fork tube assembly 1 through the damping hole 7 and the positioning tube 3, and part of it enters the front fork tube assembly 1 through the piston assembly 4. At the same time, under the action of the first buffer spring 5 and the second buffer spring 6, the damping force is achieved during the relative movement, which dampens the relative movement of the bottom cylinder 2 and the positioning tube 3. If the road conditions with high frequency and low amplitude shock absorption and large potholes are driven, the required damping force is greater, which causes the hydraulic oil to flow too fast, increasing the movement stroke of the positioning tube 3, which may produce abnormal noise of bottoming out.

[0025] Therefore, a valve body 8 for increasing damping is installed at the end of the positioning tube 3. The valve body 8 connects the positioning tube 3 and the fork tube assembly 1. By further increasing the damping force of the positioning tube 3 during relative movement by the valve body 8, that is, increasing the damping force of the hydraulic oil flowing from the positioning tube 3 into the fork tube assembly 1, the positioning tube 3 is guaranteed to have greater damping force during movement, avoiding bottoming out and collision, and effectively avoiding abnormal noise during pressing down and bottoming out.

[0026] Specifically, the main function of the valve body 8 is to control the flow rate of the hydraulic oil flowing inside the positioning tube 3 to reduce the flow rate, thereby generating additional damping force to shorten the relative movement distance of the positioning tube 3 and avoid bottoming out, thus satisfying the buffering force. At least two structures can be used to achieve this.

[0027] In one embodiment, the valve body 8 includes a valve seat 9 threadedly connected to the end of the positioning tube 3. The valve seat 9 has a stepped hole 90. The small hole of the stepped hole 90 is located on one side of the positioning tube 3. The valve seat 9 is increased by means of threaded connection. The stepped hole 90 provided in the valve seat 9 allows high-pressure hydraulic oil to flow further from the small hole side to the large hole side, increasing the flow damping.

[0028] In another embodiment, the valve body 8 includes a sliding seat 10 embedded at the end of the positioning tube 3. A clamping ring 11 for pressing the sliding seat 10 is threadedly connected to the end of the positioning tube 3. After the clamping ring 11 presses the sliding seat 10, a buffer cavity is formed between the clamping ring 11 and the sliding seat 10. A first through hole 12 is provided on the sliding seat 10. An adjusting seat 13 is floatingly installed inside the sliding seat 10. A second through hole 14 is provided on the adjusting seat 13. High-pressure hydraulic oil in the positioning tube 3 enters through the first through hole 12 and is adjusted... When the seat 13 floats, the hydraulic oil flows from the second through hole 14 and the clamping ring 11 into the fork tube assembly 1. At the same time, notch structures 15 are provided on the adjusting seat 13 at intervals around the second through hole 14 to ensure that when the adjusting seat 13 floats, the hydraulic oil can enter the second through hole 14 through the notch structures 15. Meanwhile, a third buffer spring 16 is provided in the sliding seat 10 to push the adjusting seat 13. The third buffer spring 16 is used to dynamically adjust the floating state of the adjusting seat 13 according to the internal oil pressure, thereby achieving damping when the hydraulic oil passes through the valve body 8.

[0029] Specifically, the fork tube assembly 1 includes a fork tube 101 and a sealing end 102 fixed on the fork tube 101. The fork tube 101 is provided with a limiting tube 104 and a limiting ring 103 abutting against the limiting tube 104. The first buffer spring 5 abuts against the limiting ring 103. The elastic stroke of the first buffer spring 5 is limited by the internally integrated limiting tube 104 and limiting ring 103, so that the first buffer spring 5 can generate a reliable elastic force under different shock absorption requirements. The shock absorption effect can be adjusted by changing the length of the limiting tube 104, but the length of the limiting tube 104 is generally determined at the factory.

[0030] Meanwhile, a first sealing ring 17 is provided at the end of the positioning tube 3 to cooperate with the inner wall of the front fork tube 101. The first sealing ring 17 is used to maintain the sealing effect during the relative movement of the positioning tube 3 relative to the front fork tube 101.

[0031] Meanwhile, a sliding sealing seat 18 is installed at the end of the bottom cylinder 2. The front fork tube 101 is sealed to the sliding sealing seat 18. The sliding sealing seat 18 enables the bottom cylinder 2 to maintain a sealing effect relative to the front fork tube 101 during movement, thereby achieving reliable sealing of the internal hydraulic oil through the internal and external sealing structures.

[0032] Specifically, a sliding ring 19 is installed on the fork tube 101. The sliding ring 19 slides in conjunction with the inner wall of the bottom tube 2, and the relative sliding motion between the bottom tube 2 and the fork tube 101 is made more flexible by using the sliding ring 19.

[0033] It should be noted that the sealing structure of the bottom cylinder 2 and the piston assembly 4, which are not described in detail, can all adopt the mature structures in existing shock absorbers. This embodiment mainly focuses on describing in detail the structure related to the reliable sliding action of the end of the positioning tube 3 and the structure related to increasing the damping force. Other structures that may be unclear adopt the existing structure of the same type of shock absorber.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A shock absorber for eliminating abnormal noise, characterized in that: The device includes a fork tube assembly (1), a bottom tube (2), and a positioning tube (3). The fork tube assembly (1) is inserted into the bottom tube (2). The positioning tube (3) is inserted into the fork tube assembly (1) and has a piston assembly (4) at one end. The fork tube assembly (1) has a first buffer spring (5) that abuts against the end of the positioning tube (3). The positioning tube (3) has a second buffer spring (6) that abuts against the piston assembly (4). The positioning tube (3) has a damping hole (7) that communicates with the interior. A valve body (8) for increasing damping is installed at the end of the positioning tube (3), and the valve body (8) connects the positioning tube (3) to the fork tube assembly (1).

2. The shock absorber for eliminating abnormal noise according to claim 1, characterized in that: The valve body (8) includes a valve seat (9) threaded to the end of the positioning tube (3), and a stepped hole (90) is provided on the valve seat (9), with the small hole of the stepped hole (90) located on one side of the positioning tube (3).

3. A shock absorber for eliminating abnormal noise according to claim 1, characterized in that: The valve body (8) includes a sliding seat (10) embedded at the end of the positioning tube (3), and the end of the positioning tube (3) is threadedly connected to a clamping ring (11) for clamping the sliding seat (10). The sliding seat (10) has a first through hole (12), and an adjusting seat (13) is floatingly installed inside the sliding seat (10). The adjusting seat (13) has a second through hole (14), and the adjusting seat (13) has notch structures (15) spaced around the second through hole (14). The sliding seat (10) has a third buffer spring (16) for pushing the adjusting seat (13).

4. A shock absorber for eliminating abnormal noise according to claim 3, characterized in that: The fork tube assembly (1) includes a fork tube (101) and a sealing end (102) fixed on the fork tube (101). The fork tube (101) is provided with a limiting tube (104) and a limiting ring (103) abutting on the limiting tube (104). The first buffer spring (5) abuts on the limiting ring (103).

5. A shock absorber for eliminating abnormal noise according to claim 4, characterized in that: The end of the positioning tube (3) is provided with a first sealing ring (17) that mates with the inner wall of the fork tube (101).

6. A shock absorber for eliminating abnormal noise according to claim 5, characterized in that: The bottom tube (2) is equipped with a sliding sealing seat (18) at its end, and the fork tube (101) is sealed to the sliding sealing seat (18).

7. A shock absorber for eliminating abnormal noise according to claim 6, characterized in that: The fork tube (101) is equipped with a sliding ring (19), which slides in contact with the inner wall of the bottom tube (2).

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