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Shock absorber

A technology of shock absorbers and fluid chambers, applied in shock absorbers, springs/shock absorbers, shock absorbers, etc., can solve problems such as poor response, low energy regeneration efficiency, and transmission loss, and achieve simple structure, Reduced manufacturing costs and high responsiveness

Pending Publication Date: 2020-05-26
AISIN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the shock absorber of Patent Document 1, since the screw member is used as the power transmission mechanism, the screw member will wear out during long-term use, resulting in looseness between the parts.
As a result of the generation of wear powder, there is also the disadvantage that the smoothness of the movement of the piston housing is likely to be damaged.
[0007] In addition, as a result of using the CVT mechanism, the speed change mechanism for transmission of rotation becomes larger, which impairs the mountability to various devices.
In addition, in order to change the rotation speed, it is necessary to change and control the shape of at least one of the pulleys engaged with the conveyor belt, which complicates the device.
In addition, the weight of the device increases, and there is also a concern that the cost increases
[0008] As a result of these, not only the responsiveness of the cushioning function of the shock absorber decreases, but also the stable maintenance of the cushioning function becomes difficult.
When the expansion and contraction of the shock absorber is transmitted to the motor part, a transmission loss occurs, and the energy regeneration efficiency also decreases
Such energy consumption also occurs in the power running control in which the motor unit is driven to rotate the screw member to control the expansion and contraction state of the piston case, so the responsiveness is deteriorated when the vehicle height adjustment of the suspension, etc. is performed.
[0009] In addition, in the device of Patent Document 1, if the direction of movement of the piston casing is changed, the direction of rotation of the screw member is reversed.
That is, every time the expansion and contraction of the shock absorber is changed, the screw member and each part of the CVT mechanism need to reverse the rotation direction against the rotational inertia, and the responsiveness of the cushioning function deteriorates.
In addition, energy is consumed due to the reverse operation, and the regeneration efficiency is also deteriorated.

Method used

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Experimental program
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Effect test

no. 1 Embodiment approach 〕

[0121] Figure 1 to Figure 5 The shock absorber S according to the first embodiment is shown. The shock absorber S according to the present invention is used, for example, in a suspension of a vehicle. This shock absorber S has a cylinder 1 a that accommodates hydraulic oil as a fluid therein, and a piston 1 b that reciprocates while partitioning the inside of the cylinder 1 a into a first fluid chamber R1 and a second fluid chamber R2 . The shock absorber body 1 is constituted by a cylinder 1a and a piston 1b. A pump 2 capable of changing the flow rate of hydraulic fluid is provided in parallel to the cylinder 1 a , and a rotary armature 3 interlocked with operating members constituting the pump 2 is provided on the pump 2 . With these members, it is possible to adjust the operating speed of the piston 1b, or to adjust the vehicle height by actively operating the piston 1b.

[0122] Here, a vane pump 21 is used as an example of the pump 2 . When the piston 1b reciprocates...

no. 2 Embodiment approach 〕

[0156] Figure 6 This is an example in which the first valve 4 in the first embodiment described above is omitted. Here, the fluid from the first port 1f of the cylinder is connected to the first port P1 and the second pressure chamber R4, and the fluid from the second port 1g of the cylinder is connected to the second port P2 and the first pressure chamber R3.

[0157] Figure 6 This is a state in which the piston 1b is relatively lowered, and represents, for example, a state in which a wheel of a vehicle is pushed up and the fluid in the first fluid chamber R1 is pushed out. In such a state, it is necessary to prevent the wheel from being lifted up, and it is necessary to reduce the amount of fluid flowing through the vane pump 21 .

[0158] The fluid flowing out of the first fluid chamber R1 flows into the second pressure chamber R4 to press the ring member 2c so as to approach the rotation center X of the fluid rotor 2b. As a result, the amount of fluid flowing from the...

no. 3 Embodiment approach 〕

[0162] Such as Figure 7 as well as Figure 8 As shown, it is also possible to provide a second valve 5 that can change the flow path and flow rate of the working oil by electric drive between the vane pump 21 and the first valve 4 . As the second valve 5 , for example, an OCV (Oil Control Valve: oil control valve) is used.

[0163] The inside of the second valve 5 is provided with a plunger 5a having a through-flow passage 5e in the center, and the control unit 7 is configured, for example, based on the stroke sensor 1e provided between the piston 1b of the shock absorber body 1 and the cylinder 1a. The signal outputs a driving signal to the second valve 5 to control the position of the plunger 5a.

[0164] In the second valve 5, hydraulic fluid from the high-pressure port PH is connected to one of the two receiving ports 5b provided in the second valve 5, and hydraulic fluid from the low-pressure port PL is connected to the other receiving port 5b. In addition, two discha...

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Abstract

A shock absorber includes: a cylinder accommodating a fluid; a piston that reciprocates with respect to the cylinder while partitioning an inside of the cylinder into a first fluid chamber and a second fluid chamber; a pump having a first port that communicates with either one of the first fluid chamber and the second fluid chamber and a second port that communicates with the other one of the first fluid chamber and the second fluid chamber, and including a flow rate change portion that changes a circulation amount of the fluid circulating between the first port and the second port an electricrotor rotating in conjunction with the pump; and a stator forming a magnetic field between the electric rotor and the stator.

Description

technical field [0001] The present invention relates to a shock absorber that utilizes fluid, has a variable cushioning effect, and has an energy regeneration function and a telescoping action function. Background technique [0002] Conventionally, as such a damper, for example, there is a damper described in the following Patent Document 1 (see paragraphs [0007] to [0012], etc.). [0003] The shock absorber described in Patent Document 1 includes a main body housing and a piston housing that move relative to each other. The main body housing is provided with a screw member which rotates relative to the main body housing, and the piston housing is provided with a nut member which is screwed with the screw member. As the piston housing moves up and down, the integral nut part moves up and down, so that the screw part is driven to rotate. A CVT mechanism is connected to the screw member, and the rotational speed of the screw member is appropriately changed via the belt membe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60G13/08
CPCB60G13/08B60G2202/24F03C2/304F04C2/344F04C14/223B60G2300/60B60G13/14F16F9/145F16F9/18F01C13/00F16F9/19F16F9/53
Inventor 小野寿高须胜彦小松悟志
Owner AISIN CORP