TW201910659A - Vehicle shock absorber - Google Patents

Abstract

A vehicle shock absorber includes a first shock absorbing unit and a second shock absorbing unit. The first shock absorbing unit is able to reduce the generation of the damping force and quickly replenish oil through a first one-way valve during the compression operation, and generate sufficient tensile side damping force when performing the stretching operation. The second shock absorbing unit is able to generate a sufficient compression side damping force through a second one-way valve during the compression operation, and reduce the generation of the damping force during the stretching operation to quickly replenish oil. Because the second shock absorbing unit provides sufficient compression side damping force, it is unlikely to encounter a bottoming situation and thus there is no need to configure a stop block, thereby not only saving the cost, but also avoiding the generation of cupping sound. In addition, the second shock absorbing unit is able to quickly replenish oil when performing the stretching operation, and thus there is no need to additionally provide a control valve thereby further reducing the cost.

Description

Vehicle shock absorber

The invention relates to a buffer device, in particular to a vehicle shock absorber.

Referring to FIG. 1 and FIG. 2, a general vehicle shock absorber is composed of two pairs of suspension devices 1. Each suspension device 1 includes an outer tube 11 and an inner tube fixed in the outer tube 11. A tube 12, a set of stoppers 13 provided at the bottom end of the inner tube 12, a fixing member 14 penetrating the outer tube 11 from below to fix the inner tube 12, and the stopper 13, and a set of A control valve 15 at the top of the pipe 12, a fork pipe 16 slidably positioned between the outer pipe 11 and the inner pipe 12, a spring 17 provided in the fork pipe 16, and a fork pipe 16 A sleeve 18 of an upper one-way valve 181 and a lower one-way valve 182 are provided, two lower openings 191 are opened in the inner pipe 12, and two are located above the lower openings 191 and opened in the inner pipe 12 上 上 孔 192. The inner pipe 12 includes a pipe body portion 121 fixed on the outer pipe 11, and a top seat portion 122 provided on a top end of the pipe body portion 121. The control valve 15 is disposed in the top seat portion 122. The outer tube 11, the tube body 121 of the inner tube 12 and the sleeve 18 cooperate to define a lower oil chamber 193 communicating with the lower openings 191. The inner tube 12, the fork tube 16 and the sleeve 18 cooperate to define an upper oil chamber 194 communicating with the upper openings 192.

The outer tube 11 and the inner tube 12 are filled with hydraulic oil, and the fork tube 16 can drive the sleeve 18 so that the sleeve 18 can perform a stretching action or a compression action with respect to the inner pipe 12 in the up-down direction. When the sleeve 18 performs a compression action, the fork tube 16 compresses the spring 17. In the foregoing process, part of the hydraulic oil in the lower oil chamber 193 will be pushed down by the sleeve 18, and The lower openings 191 enter the pipe body portion 121 of the inner pipe 12, and the other portion flows directly into the upper oil chamber 194 through the upper check valve 181 of the sleeve 18. The hydraulic oil will flow into the fork pipe 16 from the control valve 15 again, and the hydraulic oil will generate a compression-side damping force in the aforementioned flow process, thereby improving the stability and control of the vehicle body provided on the fork pipe 16 Sex.

When the fork pipe 16 is stretched upward, the spring 17 releases the elastic force to reset the vehicle body. In the foregoing process, the sleeve 18 is pushed upward, at this time, the upper check valve 181 is closed, so that the Part of the hydraulic oil in the upper oil chamber 194 enters the pipe body part 121 through the upper openings 192, and another part of the hydraulic oil enters the pipe body part 121 through the control valve 15, and the pipe body part 121 The hydraulic oil flows back into the lower oil chamber 193 through the lower openings 191, and the hydraulic oil will generate a tensile-side damping force during the aforementioned flow process to absorb the vibration generated on the road surface. The control valve 15 can control the flow rate so that the upward flow rate is small and the downward flow rate is large to avoid the problem of too slow replenishment during the stretching operation, but the additional setting of the control valve 15 will cause excessive cost. Love affairs.

However, when the fork tube 16 continues to receive downward pressure and the sleeve 18 continues to move downward, the sleeve 18 will cover the stopper 13. At this time, due to the small gap between the two, an extremely large moment will occur. The oil-locking force prevents the fork pipe 16 from hitting the outer pipe 11, thereby preventing the occurrence of instability. However, when the sleeve 18 is far away from the stopper 13, negative pressure is generated due to the small gap between the two, which makes it difficult to separate the two, and it is easy to produce cupping sounds during the hard separation process, which affects the user experience. Therefore, an additional check valve 182 is required to provide an additional oil path to avoid cupping sound, which will increase the complexity and cost of the configuration.

Therefore, an object of the present invention is to provide a vehicle shock absorber that can provide pressure-side damping force, can avoid cupping noise, and can save materials and reduce costs.

Therefore, the vehicle shock absorber of the present invention includes a first suspension unit and a second suspension unit. The first shock absorbing unit includes a first outer tube, a first inner tube fixed in the first outer tube, at least one first lateral hole opened in the first inner tube, and a slidably disposed A first fork tube between the first outer tube and the first inner tube, a first sleeve provided between the first inner tube and the first fork tube, and a first sleeve provided The first check valve on the cartridge. The first sleeve can be driven by the first fork tube to compress downward or stretch upward relative to the first inner tube and the first outer tube. The first check valve is opened when the first sleeve is compressed downward, and is closed when the first sleeve is extended upward.

The second shock absorbing unit includes a second outer tube, a second inner tube fixed in the second outer tube, at least one second lateral hole opened in the second inner tube, and a slidably disposed A second fork tube between the second outer tube and the second inner tube, a second sleeve provided between the second inner tube and the second fork tube, and a second sleeve A second check valve on the cartridge. The second sleeve can be driven by the second fork tube to compress downward or stretch upward relative to the second inner tube and the second outer tube. The second check valve is closed when the second sleeve is compressed downward, and is opened when the second sleeve is extended upward.

The effect of the present invention is that when the first shock absorbing unit performs a compression action and the second shock absorbing unit performs a stretching action, the first check valve and the second check valve are opened for hydraulic oil to pass, The damping force can be reduced to replenish oil quickly, so that no additional control valve is needed to achieve the cost saving effect; on the contrary, when the first suspension unit performs a stretching action and the second suspension unit performs a compression action, the first A non-return valve and the second non-return valve are closed to prevent the hydraulic oil from passing, and the hydraulic oil will pass through the at least one first lateral hole and the at least one second lateral hole, thereby generating a stretched side. (First suspension unit) or compression side (second suspension unit) damping force, and the damping force when the second suspension unit is compressed is sufficient to maintain driving stability, and the oil lock force generated is also sufficient to support the vehicle body against contact Therefore, the first suspension unit and the second suspension unit do not need to be provided with a stopper, which not only saves costs, but also avoids cupping noise.

Referring to FIG. 3 and FIG. 4, an embodiment of a vehicle shock absorber according to the present invention includes a first suspension unit 2 and a second suspension unit 3. The first suspension unit 2 includes a first outer tube 21, a first inner tube 22 fixed in the first outer tube 21, a plurality of first lateral holes 23 opened in the first inner tube 22, A first fork tube 24 slidably disposed between the first outer tube 21 and the first inner tube 22, and a first sleeve disposed between the first inner tube 22 and the first fork tube 24 The barrel 25 and a first check valve 26 disposed on the first sleeve 25. The first outer tube 21 and the first inner tube 22 cooperate to surround a first through slot 27 extending in the vertical direction. The first sleeve 25 partitions the first through groove 27 into a first lower oil chamber 271 located below the first sleeve 25 and a first upper oil chamber located above the first sleeve 25. 272.

3 and 5, when the first outer tube 21 is compressed, the first outer tube 21 and the first inner tube 22 are moved upward, that is, the first fork tube 24 and the first sleeve 25. The compression action is performed downward with respect to the foregoing two. During the compression process, the first check valve 26 is in an open state, so that the first lower oil chamber 271 can communicate with the first upper side through the first check valve 26. The oil chamber 272, so after the hydraulic oil is compressed, it can directly enter the first upper side oil chamber 272 from the first lower side oil chamber 271, thereby achieving the effect of rapid oil replenishment. Referring to FIGS. 6 and 7, when the first outer tube 21 is no longer compressed, a spring provided inside will reset the first outer tube 21 and the first inner tube 22 downward, that is, the first The fork tube 24 and the first sleeve 25 are stretched upward relative to the foregoing two. During the stretching process, the first check valve 26 is in a closed state, so that the first lower oil chamber 271 and the first An upper oil chamber 272 is not connected, so the hydraulic oil in the first upper oil chamber 272 flows from the first inner pipe 22 through the first lateral holes 23 to the first lower oil chamber 271. This kind of return oil circuit can avoid the generation of negative pressure without making cupping sound.

Referring to FIG. 4 and FIG. 8, the second shock absorbing unit 3 includes a second outer pipe 31, a second inner pipe 32 fixed in the second outer pipe 31, and a plurality of openings provided on the second inner pipe 32. A second lateral hole 33, a second fork pipe 34 slidably disposed between the second outer pipe 31 and the second inner pipe 32, and a second fork pipe 34 disposed in the second inner pipe 32 and the second fork pipe A second sleeve 35 between 34 and a second check valve 36 disposed on the second sleeve 35. The second outer tube 31 and the second inner tube 32 cooperate to surround a second through slot 37 extending in the vertical direction. The second sleeve 35 separates the second through groove 37 from a second lower oil chamber 371 located below the second sleeve 35 and a second upper oil chamber located above the second sleeve 35. 372.

When the second outer tube 31 is compressed, the second outer tube 31 and the second inner tube 32 are moved upward, that is, the second fork tube 34 and the second sleeve 35 are moved in a direction relative to the foregoing two. The second check valve 36 is closed during the compression process, so that the second lower oil chamber 371 cannot communicate with the first upper oil chamber 272, so the inside of the first lower oil chamber 271 After being compressed, the hydraulic oil will enter the second inner pipe 32 through the second lateral holes 33, thereby generating sufficient compression-side damping force. Referring to FIG. 9 and FIG. 10, when the second outer tube 31 is no longer compressed, a spring provided in the inner portion will reset the second outer tube 31 and the second inner tube 32 downward, that is, the second outer tube 31 The fork tube 34 and the second sleeve 35 are stretched upward relative to the foregoing two. During the stretching process, the second check valve 36 is in an open state, so that the second lower oil chamber 371 passes through the first The two check valves 36 are in communication with the second upper oil chamber 372, so the hydraulic oil can be quickly replenished through this first-line path. It should be noted that in addition to adjusting the spacing of the second lateral holes 33 to change the damping force on the compression side, the number of the second lateral holes 33 can also be changed to a different number, so that the damping force can be gradually increased to correspond to different road conditions. Different shock absorption effects.

Referring again to FIG. 3 and FIG. 4, the second shock absorbing unit 3 provides sufficient damping force and oil lock force on the compression side, so it is not easy to bottom out without setting a stop, and no cupping sound is generated. And the first shock absorbing unit 2 can achieve the effect of quick oil replenishment, so as to be able to respond quickly during stretching and generate sufficient stretching-side damping force.

In summary, while the configuration of the present invention has good shock absorption performance, it also achieves the effect of not requiring the setting of a stop and an additional control valve, and does not generate cupping noise, which effectively reduces costs and materials, so it can be achieved. Object of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited in this way, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the patent specification of the present invention are still Within the scope of the invention patent.

2‧‧‧The first suspension unit

21‧‧‧First Outer Tube

22‧‧‧First inner tube

23‧‧‧first lateral hole

24‧‧‧The first fork tube

25‧‧‧first sleeve

26‧‧‧The first check valve

27‧‧‧First through slot

271‧‧‧First lower side oil chamber

272‧‧‧First upper oil chamber

3‧‧‧Second suspension unit

31‧‧‧Second Outer Tube

32‧‧‧Second inner tube

33‧‧‧Second lateral hole

34‧‧‧Second Fork Tube

35‧‧‧Second sleeve

36‧‧‧Second check valve

37‧‧‧Second through slot

371‧‧‧Second lower oil chamber

372‧‧‧Second upper oil chamber

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: FIG. 1 and FIG. 2 are cross-sectional views illustrating when one sleeve of a conventional shock absorbing device is at different heights Fig. 3 is a sectional view illustrating a first suspension unit in an embodiment of the vehicle shock absorber according to the present invention; Fig. 4 is a sectional view illustrating a second suspension unit in the embodiment; 5 is a cross-sectional view illustrating a state in which the first suspension unit performs a downward compression operation from FIG. 3; FIGS. 6 and 7 are cross-sectional views illustrating a state in which the first suspension unit performs a stretching operation; 8 is a cross-sectional view illustrating a state in which the second suspension unit performs a compression action downward from FIG. 4; FIGS. 9 and 10 are cross-sectional views illustrating a state in which the second suspension unit performs a stretching action; and FIG. 11 is a cross-sectional view illustrating that the second suspension unit has more second lateral holes.

Claims (5)

A shock absorber for a vehicle includes: a first shock absorbing unit including: a first outer pipe, a first inner pipe, fixed in the first outer pipe, and at least one first lateral hole opened in the On the first inner tube, a first fork tube is slidably disposed between the first outer tube and the first inner tube, and a first sleeve is disposed between the first inner tube and the first fork tube. Between, and can be driven by the first fork pipe to compress or stretch downward relative to the first inner pipe and the first outer pipe, and a first check valve is disposed on the first sleeve The first check valve is opened when the first sleeve is compressed downward and closed when the first sleeve is stretched upward; and a second shock absorbing unit includes: a second outer A second inner tube is fixed in the second outer tube. At least one second lateral hole is opened on the second inner tube. A second fork tube is slidably disposed on the second outer tube. And the second inner tube, a second sleeve is disposed between the second inner tube and the second fork tube, and the second sleeve can be driven by the second fork tube to be opposite to the second tube A second inner tube and the second outer tube are compressed downward or stretched upward, and a second check valve is disposed on the second sleeve, and the second check valve is compressed downward on the second sleeve It is in a closed state from time to time and is opened when the second sleeve is stretched upward. The shock absorber for a vehicle according to claim 1, wherein a first outer pipe of the first shock absorbing unit and the first inner pipe cooperate to surround a first through groove, and the first sleeve A through groove separates a first lower oil chamber located below the first sleeve and a first upper oil chamber located above the first sleeve. When the first check valve is opened, the first The lower oil chamber communicates with the first upper oil chamber. When the first check valve is closed, the first lower oil chamber does not communicate with the first upper oil chamber. The vehicle shock absorber according to claim 2, wherein the second outer pipe of the second shock absorbing unit and the second inner pipe cooperate to surround a second through groove, and the second sleeve The two-way groove separates a second lower oil chamber located below the second sleeve and a second upper oil chamber located above the second sleeve. When the second check valve is opened, the first The two lower oil chambers communicate with the second upper oil chamber. When the second check valve is closed, the second lower oil chambers do not communicate with the second upper oil chamber. The vehicle shock absorber according to claim 1, wherein the first suspension unit includes a plurality of first lateral holes. The shock absorber for a vehicle according to claim 1, wherein the second suspension unit includes a plurality of second lateral holes.