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1. 发明申请

US20210123493A1 SHOCK ABSORBER 有权
公开(公告)号：US20210123493A1
公开(公告)日：2021-04-29
申请号：US17042450
申请日：2019-04-09
申请人： Hitachi Automotive Systems, Ltd.
发明人： Kazuya MATSUDA , Mikio YAMASHITA , Daisuke TANABE , Naofumi HARADA
IPC分类号： F16F9/18 , F16F9/348 , F16F9/50
摘要： A shock absorber includes a cylinder sealed with a working oil liquid, a piston slidably fitted in the cylinder, a piston rod connected to the piston and extended to the outside of the cylinder, and a plurality of passages through which the working oil liquid flows due to the sliding of pistons therein, and a damping force generating mechanism that is provided in a part of the passages and suppresses the flow of the working oil liquid to generate a damping force. The damping force generating mechanism includes a valve body through which the passage penetrates, an annular seat that projects from the valve body and surrounds the passage, and a disc that can be seated on the seat. A contact width at which the disc and the seat come into contact with each other is different depending on a position in the circumferential direction. As a result, it is possible to obtain a shock absorber capable of suppressing a sudden change in damping force before and after the opening of the disc valve without having a complicated structure.

2. 发明申请

US20170307044A1 SHOCK ABSORBER 审中-公开
公开(公告)号：US20170307044A1
公开(公告)日：2017-10-26
申请号：US15512924
申请日：2015-08-25
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Mikio YAMASHITA , Kunio TAKIGUCHI
IPC分类号： F16F9/342 , F16F9/32 , F16F9/348 , F16F9/44 , F16F9/48
CPC分类号： F16F9/342 , F16F9/185 , F16F9/3221 , F16F9/3257 , F16F9/348 , F16F9/3485 , F16F9/44 , F16F9/486 , F16F2230/18
摘要： Provided is a shock absorber that includes a middle chamber formed by a piston, a first damping-force generating device that is provided between an upper chamber and the middle chamber and generates a damping force, a second damping-force generating device that is provided between a lower chamber and the middle chamber and generates a damping force, and a position-based state changing device that changes a state of a passage to a state in which the upper chamber and the lower chamber communicate with each other, a state in which the upper chamber and the middle chamber communicate with each other, or a state in which the lower chamber and the middle chamber communicate with each other depending on a position of the piston.

3. 发明申请

US20160195152A1 DAMPING FORCE CONTROL TYPE SHOCK ABSORBER 有权
标题翻译：阻尼力控制型冲击吸收器
公开(公告)号：US20160195152A1
公开(公告)日：2016-07-07
申请号：US14910823
申请日：2014-08-11
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Shunsuke MORI , Fumiyuki YAMAOKA , Mikio YAMASHITA
IPC分类号： F16F9/46
CPC分类号： F16F9/465
摘要： PROBLEMProvided is a damping force control type shock absorber capable of obtaining an appropriate damping force even in the event of a failure independently of the stoke of a valving element of a solenoid valve.MEANS FOR SOLVINGA piston 5 having a piston rod 6 connected thereto is fitted in a cylinder 2 having hydraulic oil sealed therein, and a flow of hydraulic oil induced by movement of the piston 5 is controlled by a damping force generating mechanism 26 to generate a damping force. In the damping force generating mechanism 26, damping force is generated by a pilot-type main valve 27 and a normally-open pilot valve 28 which is a solenoid valve, and the damping force is adjusted by energization of a coil 37. A fail-safe valve 100 is provided downstream of the pilot valve 28. During normal operations, the fail-safe valve 100 opens the flow path through excitation of the coil 37 of the pilot valve 28. In the event of a failure, due to loss of excitation, the fail-safe valve 100 restricts the flow path to generate an appropriate damping force in place of the pilot valve 28, which has become inoperable.
摘要翻译：问题提供一种即使在发生故障的情况下也可以获得适当的阻尼力的阻尼力控制型减震器，而与电磁阀的阀元件的冲击无关。用于解决方案具有连接有活塞杆6的活塞5装配在其中密封有液压油的气缸2中，并且由阻尼力产生机构26控制由活塞5的运动引起的液压油的流动，阻尼力。在阻尼力产生机构26中，由先导式主阀27和作为电磁阀的常开先导阀28产生阻尼力，通过线圈37的通电来调节阻尼力。安全阀100设置在先导阀28的下游。在正常操作期间，故障安全阀100通过激励先导阀28的线圈37来打开流路。在失效的情况下，由于励磁损失故障安全阀100限制流路以代替不可操作的先导阀28产生适当的阻尼力。

4. 发明申请

US20160061284A1 SHOCK ABSORBER 有权
标题翻译：减震器
公开(公告)号：US20160061284A1
公开(公告)日：2016-03-03
申请号：US14832162
申请日：2015-08-21
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Mikio YAMASHITA
IPC分类号： F16F9/36 , F16F9/348
CPC分类号： F16F9/369 , F16F9/3415 , F16F9/3485 , F16F9/465
摘要： A damping force is generated by controlling a flow of oil caused by a sliding displacement of a piston in a cylinder with the aid of a disk valve, against extension and compression of a piston rod. An elastic seal member, fixedly attached to a back surface side of the disk valve, is fitted in a recessed portion of a pilot body, by which a pilot chamber is formed and valve opening of the disk valve is controlled by inner pressure in the pilot chamber. The elastic seal member is in abutment with a bottom portion of the recessed portion, and the disk valve is urged toward inner and other seat portions by elasticity of the elastic seal member. This configuration ensures that the disk valve can be closed without a set load provided from deflection of the disk valve, thereby generating a stable low damping force.
摘要翻译：通过控制由圆盘内的活塞在圆盘中的滑动位移而引起的油的流动阻止活塞杆的延伸和压缩而产生阻尼力。固定在盘式阀的后表面侧的弹性密封件安装在导向体的凹部中，通过该导向室形成导向室，并通过导向件内部的压力来控制盘阀的阀开度房间。弹性密封构件与凹部的底部抵接，并且通过弹性密封构件的弹性将盘阀推向内座部和其他座部。这种构造确保了盘阀可以被关闭，而不会由于盘阀的偏转而产生设定的负载，从而产生稳定的低阻尼力。

5. 发明申请

US20160052361A1 TUBE AND SHOCK ABSORBER 有权
标题翻译：管和冲击吸收器
公开(公告)号：US20160052361A1
公开(公告)日：2016-02-25
申请号：US14779645
申请日：2014-03-25
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Mikio YAMASHITA , Makoto NISHIMURA
IPC分类号： B60G17/08 , F16F9/32 , F16F9/50 , B60G13/08 , F16F9/06
CPC分类号： B60G17/08 , B21D17/04 , B21H7/182 , B60G13/08 , F16F9/06 , F16F9/3235 , F16F9/36 , F16F9/50 , F16J15/062
摘要： A tube having sealing ring grooves formed by a sequential rotational process and a shock absorber including the tube, in which durability of a sealing ring fitted in each of the sealing ring grooves is enhanced. An inclination angle (θ1) formed with respect to a plane (PL1) perpendicular to an axis of a separator tube by a side surface of the sealing ring groove, which is located on an opening end side of the separator tube, is set to 8° or more. With this, a maximum tensile stress to be applied to an O-ring can be reduced to be smaller than a maximum tensile stress in a case of using a backup ring. As a result, the durability of the O-ring can be set equivalent to or enhanced to be higher than durability in the case of using the backup ring.
摘要翻译：具有通过顺序旋转处理形成的密封环槽和包括管的减震器的管，其中装配在每个密封环槽中的密封环的耐久性得到增强。设置在位于分隔管的开口端侧的密封环槽的侧面垂直于分离管的轴线的平面（PL1）形成的倾斜角（＆amp; 至8°以上。由此，在使用备用环的情况下，施加到O形环的最大拉伸应力可以减小到小于最大拉伸应力。结果，O形环的耐用性可以设定为等于或增强到高于在使用支撑环的情况下的耐久性。

6. 发明申请

US20180094692A1 DAMPER AND METHOD OF ASSEMBLING DAMPER 审中-公开
公开(公告)号：US20180094692A1
公开(公告)日：2018-04-05
申请号：US15562483
申请日：2016-09-27
申请人： Hitachi Automotive Systems, Ltd.
发明人： Kengo HASE , Fumiyuki YAMAOKA , Shunsuke MORI , Mikio YAMASHITA , Daiki MIYAZAWA
IPC分类号： F16F9/46 , F16K31/06 , F16F9/32 , F16F9/18
CPC分类号： F16F9/461 , F16F9/18 , F16F9/325 , F16F9/464 , F16F2226/04 , F16F2230/0082 , F16K31/0679 , F16K31/0693 , F16L37/088
摘要： Provided are a damper configured such that the axial play between a coil case and a case member can be eliminated without increasing a size of a solenoid, and a method of assembling the damper. An O-ring (seal member) is elastically supported by a tapered hole formed in an inner peripheral surface of a case member and a tapered shah formed in an outer peripheral surface of a coil case, and a retaining ring is configured to receive an axial force generated by the O-ring. The configuration enables the play between the coil case and the case member of the solenoid to be eliminated. A damping force regulation mechanism, and in turn the damper, may be made more compact in comparison with a case in which the O-ring is received by the opening side end face of the case member.

7. 发明申请

US20170080767A1 SHOCK ABSORBER 有权
公开(公告)号：US20170080767A1
公开(公告)日：2017-03-23
申请号：US15039483
申请日：2014-11-21
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Mikio YAMASHITA
IPC分类号： B60G13/08 , F16J15/32 , F16F9/348 , F16F9/18 , F16F9/504
CPC分类号： B60G13/08 , B60G2202/24 , B60G2500/04 , B60G2500/11 , B60G2800/162 , F16F9/18 , F16F9/182 , F16F9/185 , F16F9/34 , F16F9/348 , F16F9/3482 , F16F9/3484 , F16F9/50 , F16F9/504 , F16F2228/066 , F16J15/16 , F16J15/32 , F16J15/56
摘要： A shock absorber includes: a damping valve that suppresses a flow of operating fluid due to the sliding of a piston to generate damping force; a bottomed tubular pilot case that forms a pilot chamber that causes pressure to act on the damping valve in a valve closing direction, together with the damping valve; and an annular seal member (146) that is provided to be fixed to the outer circumferential side of a rear surface of the damping valve, and is fitted into a tube of the pilot case so as to be slidable and to be in a liquid tight manner. A part of the flow of the operating fluid is guided to the pilot chamber and opening of the damping valve is suppressed by the pressure of the pilot chamber. An annular concave portion (380) is formed on the outer circumferential side of the seal member (146), and an annular convex portion (385) is formed on the inner circumferential side of the seal member (146).

8. 发明申请

US20160061283A1 SHOCK ABSORBER 有权
标题翻译：减震器
公开(公告)号：US20160061283A1
公开(公告)日：2016-03-03
申请号：US14832149
申请日：2015-08-21
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Mikio YAMASHITA
IPC分类号： F16F9/36 , F16F9/348
CPC分类号： F16F9/369 , F16F9/3484
摘要： An elastic seal member fixedly attached to a back surface side of a disk valve is fitted in a recessed portion of a pilot body, by which a pilot chamber is formed. Then, vale opening of the disk valve is controlled by an inner pressure in the pilot chamber. The elastic seal member includes a thick proximal portion and a thin lip portion. A seal portion protruding on an outer circumferential portion of the lip portion is in sliding contact with an inner circumferential portion of an outer cylindrical portion of the pilot body. Deflection of the thin lip portion can reduce a sliding resistance while ensuring a sealing performance of the seal portion.
摘要翻译：固定在碟形阀的背面侧的弹性密封件装配在导向体的凹部中，形成有先导室。然后，通过先导室中的内部压力来控制盘阀的阀门开度。弹性密封件包括厚的近端部分和薄的唇部。在唇部的外周部突出的密封部与导向体的外筒部的内周部滑动接触。在确保密封部分的密封性能的同时，薄唇部分的偏转可以降低滑动阻力。

9. 发明申请

US20210197640A1 SUSPENSION APPARATUS 有权
公开(公告)号：US20210197640A1
公开(公告)日：2021-07-01
申请号：US17058362
申请日：2019-05-23
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Mikio YAMASHITA
IPC分类号： B60G21/06
摘要： A suspension apparatus includes a valve device provided between an upper chamber and a lower chamber of each of hydraulic cylinders and configured to establish and block communication between these chambers. The valve device includes a first passage and an extension-side damping force generation mechanism. Hydraulic oil flows out from the upper chamber into the first passage due to a movement of a piston in a cylinder of each of the hydraulic cylinders. The extension-side damping force generation mechanism includes a damping valve and a back-pressure chamber. The damping valve is disposed in the first passage, and generates a damping force by restricting a flow of the hydraulic oil generated due to a sliding movement of the piston. The back-pressure chamber applies an inner pressure thereof to this damping valve in a valve-closing direction.

10. 发明申请

US20180216690A1 SHOCK ABSORBER 审中-公开
公开(公告)号：US20180216690A1
公开(公告)日：2018-08-02
申请号：US15759453
申请日：2016-09-14
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Mikio YAMASHITA
IPC分类号： F16F9/18 , F16F9/19 , F16F9/348 , F16F9/512
CPC分类号： F16F9/185 , B60G13/08 , B60G2202/24 , B60G2204/128 , B60G2204/129 , B60G2206/41 , B60G2500/11 , B60G2600/182 , B60G2600/21 , B60G2800/162 , F16F9/062 , F16F9/19 , F16F9/348 , F16F9/512 , F16F2228/066 , F16F2230/00
摘要： A shock absorber including: a first passage (101) allowing working fluid to flow out from one chamber (19) as a result of movement of a piston (18); a second passage (181) provided in parallel with the first passage; a damping force generating mechanism (41) provided in the first passage, and configured to generate a damping force; a tubular case member (140) including at least a part of the second passage formed therein; an annular disc (134) supported on an inner peripheral side or an outer peripheral side in the case member. An annular seal member (156) configured to seal a gap to the case member is provided on a non-supported side of the annular disc. The shock absorber further includes two chambers (171, 172) in the case member, which are defined and provided by the disc. The disc is configured to block flow to the second passage.

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