公开(公告)号：US07344203B2

公开(公告)日：2008-03-18

申请号：US10959427

申请日：2004-10-07

申请人： Kaoru Tsubouchi ,  Yoji Inoue ,  Katsuhiro Mita ,  Koji Suzuki

发明人： Kaoru Tsubouchi ,  Yoji Inoue ,  Katsuhiro Mita ,  Koji Suzuki

IPC分类号： F15B7/10

CPC分类号： B60T11/16 ,  B60T11/232 ,  F15B7/08

摘要： A master cylinder includes a cylinder body, primary cups supported on the inner periphery of the cylinder body, and a primary piston and a secondary piston inserted in the cylinder body so as to be in sliding contact with the respective primary cups. The cylinder body is integrally formed with annular walls behind the respective primary cups. The annular walls have a greater inner diameter than the inner diameter of the cylinder body to define annular passages between the annular walls and the respective pistons. Connecting passages having a greater radial dimension than the annular passage are defined between the inner periphery of the cylinder body and the respective pistons behind the respective annular walls so as to communicate with a reservoir. While the master cylinder is not actuated, piston ports formed in the respective pistons communicate with the reservoir through the respective annular passages and connecting passages. Brake fluid can thus be sucked smoothly into the respective pressure chambers both during a return stroke of the pistons and during automatic brake control such as vehicle stability control.

摘要翻译： 主缸包括缸体，支撑在缸体的内周上的主杯，以及插入缸体中的主活塞和次活塞，以便与相应的主杯滑动接触。 圆筒体与相应的主杯后面的环形壁一体地形成。 环形壁具有比缸体的内径更大的内径，以在环形壁和相应的活塞之间限定环形通道。 具有比环形通道更大的径向尺寸的连接通道被限定在缸体的内周和相应的环形壁之后的相应的活塞之间，以便与储存器连通。 当主缸未被致动时，形成在相应活塞中的活塞端口通过相应的环形通道和连接通道与储存器连通。 因此，在活塞的返回行程期间和在例如车辆稳定性控制的自动制动控制期间，制动液体可以顺利地吸入相应的压力室。

公开(公告)号：US20050231028A1

公开(公告)日：2005-10-20

申请号：US11101500

申请日：2005-04-08

申请人： Kaoru Tsubouchi ,  Hideaki Iijima ,  Katsuhiro Mita

发明人： Kaoru Tsubouchi ,  Hideaki Iijima ,  Katsuhiro Mita

IPC分类号： B60T8/34 ,  B60T8/38 ,  B60T11/232 ,  B60T11/26

CPC分类号： B60T8/38 ,  B60T11/232 ,  B60T11/26

摘要： A master cylinder includes a cylinder body, a piston slidably received in the cylinder body to define a pressure chamber in the cylinder body, and a reservoir coupled to the cylinder body. The reservoir has a downwardly extending protrusion formed with a hole through which the interior of the reservoir communicates with the pressure chamber, and a shoulder at the top end of the hole. A valve body is received in the hole and includes a disk adapted to be moved into and out of contact with the bottom surface of the protrusion, and extensions extending upwardly from the disk and inserted in the hole. Each extension has an engaging portion protruding upwardly from the hole and engageable with the shoulder. The valve body is movable upwardly until the fluid passage defined between the disk and the protrusion is closed under the back flow pressure of hydraulic fluid toward the reservoir. The disk is formed with an orifice through which hydraulic fluid can flow from the pressure chamber into the reservoir when the fluid passage is closed.

摘要翻译： 主缸包括缸体，可滑动地容纳在缸体中以在缸体中限定压力室的活塞和联接到缸体的储存器。 储存器具有形成有孔的向下延伸的突出部，储存器的内部通过该孔与压力室连通，并且在孔的顶端具有肩部。 阀体容纳在孔中并且包括适于移动进入和离开与突起的底表面接触的盘，以及从盘向上延伸并插入孔中的延伸部。 每个延伸部具有从孔向上突出并与肩部接合的接合部。 阀体可以向上移动，直到在液压流体朝向储存器的回流压力下，在盘和突起之间限定的流体通道关闭。 盘形成有孔口，当流体通道关闭时，液压流体可以通过该孔口从压力室流入储存器。

公开(公告)号：US20050110344A1

公开(公告)日：2005-05-26

申请号：US10959427

申请日：2004-10-07

申请人： Kaoru Tsubouchi ,  Yoji Inoue ,  Katsuhiro Mita ,  Koji Suzuki

发明人： Kaoru Tsubouchi ,  Yoji Inoue ,  Katsuhiro Mita ,  Koji Suzuki

IPC分类号： B60T11/20 ,  B60T11/16 ,  B60T11/232 ,  F15B7/08 ,  B60T8/24

CPC分类号： B60T11/16 ,  B60T11/232 ,  F15B7/08

摘要： A master cylinder includes a cylinder body, primary cups supported on the inner periphery of the cylinder body, and a primary piston and a secondary piston inserted in the cylinder body so as to be in sliding contact with the respective primary cups. The cylinder body is integrally formed with annular walls behind the respective primary cups. The annular walls have a greater inner diameter than the inner diameter of the cylinder body to define annular passages between the annular walls and the respective pistons. Connecting passages having a greater radial dimension than the annular passage are defined between the inner periphery of the cylinder body and the respective pistons behind the respective annular walls so as to communicate with a reservoir. While the master cylinder is not actuated, piston ports formed in the respective pistons communicate with the reservoir through the respective annular passages and connecting passages. Brake fluid can thus be sucked smoothly into the respective pressure chambers both during a return stroke of the pistons and during automatic brake control such as vehicle stability control.

摘要翻译： 主缸包括缸体，支撑在缸体的内周上的主杯，以及插入缸体中的主活塞和次活塞，以便与相应的主杯滑动接触。 圆筒体与相应的主杯后面的环形壁一体地形成。 环形壁具有比缸体的内径更大的内径，以在环形壁和相应的活塞之间限定环形通道。 具有比环形通道更大的径向尺寸的连接通道被限定在缸体的内周和相应的环形壁之后的相应的活塞之间，以便与储存器连通。 当主缸未被致动时，形成在相应活塞中的活塞端口通过相应的环形通道和连接通道与储存器连通。 因此，在活塞的返回行程期间和在例如车辆稳定性控制的自动制动控制期间，制动液体可以顺利地吸入相应的压力室。

公开(公告)号：US20050235642A1

公开(公告)日：2005-10-27

申请号：US11110877

申请日：2005-04-21

申请人： Kaoru Tsubouchi ,  Katsuhiro Mita ,  Hideaki Iijima

发明人： Kaoru Tsubouchi ,  Katsuhiro Mita ,  Hideaki Iijima

IPC分类号： B60T11/22 ,  B60T11/08 ,  B60T11/26 ,  B60T11/28 ,  F15B7/04 ,  F15B7/08 ,  F15B7/10

CPC分类号： B60T11/28 ,  B60T11/26 ,  F15B7/08 ,  F15B7/10

摘要： A master cylinder includes a cylinder body and primary and secondary pistons slidably received in the cylinder body, thereby defining first and second pressure chambers in the cylinder body. The first and second pressure chambers communicate with a reservoir through first and second fluid passages, respectively. During automatic brake control such as traction control or vehicle stability control, hydraulic fluid is drawn from the reservoir through the first and second pressure chambers. A throttle valve is received in each of the first and second fluid passages. The throttle valves are adapted to open while the master cylinder is inoperative and to close under backflow pressure when hydraulic fluid flows from the pressure chambers toward the reservoir. The throttle valves each include a floating valve body and a valve seat. The valve seat has its radially outer portion liquid-tightly joined and fixed to the cylinder body so that the fixed position of the valve seat and the lowermost position of the floating valve body are determined by the cylinder body.

摘要翻译： 主缸包括缸体和可滑动地容纳在缸体中的主活塞和次活塞，从而在缸体中限定第一和第二压力室。 第一和第二压力室分别通过第一和第二流体通道与储存器连通。 在诸如牵引力控制或车辆稳定性控制的自动制动控制期间，液压流体通过第一和第二压力室从储存器抽出。 节流阀被容纳在第一和第二流体通道的每一个中。 当液压流体从压力室朝向储存器流动时，节流阀适于在主缸不工作时打开并且在回流压力下关闭。 节流阀各自包括浮阀体和阀座。 阀座的径向外部部分液密地接合并固定到缸体，使得阀座的固定位置和浮阀体的最低位置由缸体确定。

公开(公告)号：US20050016174A1

公开(公告)日：2005-01-27

申请号：US10897085

申请日：2004-07-23

申请人： Kaoru Tsubouchi ,  Katsuhiro Mita ,  Koji Suzuki

发明人： Kaoru Tsubouchi ,  Katsuhiro Mita ,  Koji Suzuki

IPC分类号： B60T11/20 ,  B60T11/26

CPC分类号： B60T11/20 ,  B60T11/26

摘要： A master cylinder is proposed that is simple in structure, can minimize the stroke of the piston required to seal the port, and minimize the possibility of the primary cup getting damaged. 1. The master cylinder includes a cylinder body. A primary cup is provided on a radially inner surface of the cylinder body. A primary piston is inserted in the cylinder body while kept in slide contact with the primary cup. The cylinder body has a rear wall supporting the primary cup. The rear wall has a radially inner surface formed with a plurality of grooves. A passage leading to a reservoir is provided in the rear of the grooves. The piston is formed with radial through holes corresponding to the grooves. When the piston is at the return end of its stroke, the pressure chamber defined in the cylinder body is adapted to communicate with the reservoir through the radial through holes, the grooves of the rear wall and the passage. If the master cylinder is a tandem master cylinder, all of the abovementioned elements are provided both for the first and second pressure chambers.

摘要翻译： 提出了一种结构简单的主缸，可以最小化密封端口所需的活塞冲程，并最大限度地减小主杯损坏的可能性。 主缸包括缸体。 主缸设置在缸体的径向内表面上。 主活塞被插入到缸体中，同时保持与主杯滑动接触。 缸体具有支撑主杯的后壁。 后壁具有形成有多个凹槽的径向内表面。 通向贮槽的通道设置在槽的后部。 活塞形成有对应于凹槽的径向通孔。 当活塞处于其行程的返回端时，限定在缸体中的压力室适于通过径向通孔，后壁的凹槽和通道与储存器连通。 如果主缸是串联主缸，则所有上述元件都设置用于第一和第二压力室。

公开(公告)号：US07055322B2

公开(公告)日：2006-06-06

申请号：US10958328

申请日：2004-10-06

申请人： Atsushi Yasuda ,  Hideaki Iijima ,  Toshiharu Okuda ,  Kaoru Tsubouchi ,  Katsuhiro Mita ,  Koji Suzuki

发明人： Atsushi Yasuda ,  Hideaki Iijima ,  Toshiharu Okuda ,  Kaoru Tsubouchi ,  Katsuhiro Mita ,  Koji Suzuki

IPC分类号： B60T11/20

CPC分类号： B60T11/236

摘要： A master cylinder includes a primary piston and a secondary piston, each formed with piston ports which include two different kinds of ports, i.e. first ports for ensuring communication between a reservoir and a pressure chamber of the master cylinder, and second ports through which brake fluid is sucked from the reservoir during automatic break control. The second ports are greater in number than the first ports and are positioned forwardly of the first ports so that the second ports are closed by primary cups which are provided on the inner wall of the cylinder body so as to be in sliding contact with the respective pistons before the first ports when the respective pistons are advanced. An annular wall having a greater inner diameter than the outer diameter of the pistons is formed on the inner wall of the cylinder body to support the back of each of the primary cups. An annular groove is formed in each piston so as to communicate with the first ports. The annular groove is preferably arranged so as to radially oppose the annular wall when the piston is in an inoperative position.

摘要翻译： 主缸包括主活塞和次级活塞，每个主活塞形成有活塞端口，活塞端口包括两种不同类型的端口，即用于确保储液器与主缸的压力室之间的连通的第一端口，以及制动液 在自动断开控制期间从油箱吸入。 第二端口的数量大于第一端口，并且位于第一端口的前方，使得第二端口由设置在缸体的内壁上的初级杯封闭，以便与相应的第一端口滑动接触 当各个活塞前进时，在第一个端口之前的活塞。 在缸体的内壁上形成具有比活塞的外径大的内径的环形壁，以支撑每个主杯的背面。 在每个活塞中形成环形槽以与第一端口连通。 当活塞处于非操作位置时，环形槽优选地布置成径向地与环形壁相对。

公开(公告)号：US07032380B2

公开(公告)日：2006-04-25

申请号：US10897085

申请日：2004-07-23

申请人： Kaoru Tsubouchi ,  Katsuhiro Mita ,  Koji Suzuki

发明人： Kaoru Tsubouchi ,  Katsuhiro Mita ,  Koji Suzuki

IPC分类号： B60T11/20 ,  F15B7/08

CPC分类号： B60T11/20 ,  B60T11/26

摘要： A brake master cylinder includes a cylinder body having a circumferential groove formed therein. A primary cup is received in the groove and supported axially by a rear wall defined by the groove. A primary piston is inserted in the cylinder body in sliding contact with the primary cup. The rear wall has a radially inner surface formed with a plurality of grooves. A passage leading to a reservoir is provided in the rear of the grooves. The piston is formed with radial through holes corresponding to the grooves. When the piston is at the return end of its stroke, the pressure chamber defined in the cylinder body can communicate with the reservoir through the radial through holes, the grooves and the passage.

摘要翻译： 制动主缸包括其中形成有周向槽的缸体。 主杯容纳在槽中并由由凹槽限定的后壁轴向支撑。 主活塞与主杯滑动接触地插入缸体中。 后壁具有形成有多个凹槽的径向内表面。 通向贮槽的通道设置在槽的后部。 活塞形成有对应于凹槽的径向通孔。 当活塞处于其行程的返回端时，限定在缸体中的压力室可以通过径向通孔，凹槽和通道与储存器连通。

公开(公告)号：US07013643B2

公开(公告)日：2006-03-21

申请号：US10895124

申请日：2004-07-21

申请人： Kaoru Tsubouchi ,  Katsuhiro Mita

发明人： Kaoru Tsubouchi ,  Katsuhiro Mita

IPC分类号： F15B7/08

CPC分类号： B60T11/20

摘要： A master cylinder includes a cylinder body and a piston slidably inserted in the cylinder while kept in slide contact with two cup members both fitted in the inner surface of the cylinder body to seal the gap between the piston and the inner surface of the cylinder body. On its radially inner surface, the cylinder body is formed with first to third piston guide portions. Each piston guide portion is formed with an odd number of grooves arranged at circumferentially equal distances. Each groove of each piston guide portion axially aligns with the corresponding grooves of the other piston guide portions. The circle including the bottoms of the grooves of the first guide portion has a diameter equal to or smaller than the rear opening of the cylinder body. The grooves of the first guide portion have a width gradually decreasing toward the front end thereof.

摘要翻译： 主缸包括缸体和可滑动地插入缸中的活塞，同时保持与装配在缸体内表面的两个杯构件滑动接触，以密封活塞与缸体内表面之间的间隙。 在其径向内表面上，缸体形成有第一至第三活塞引导部分。 每个活塞引导部分形成有奇数个沿周向相等距离布置的凹槽。 每个活塞导向部分的每个凹槽与其它活塞导向部分的相应凹槽轴向对准。 包括第一引导部分的槽的底部的圆的直径等于或小于缸体的后开口的直径。 第一引导部分的凹槽的宽度朝向其前端逐渐减小。

公开(公告)号：US06955047B2

公开(公告)日：2005-10-18

申请号：US10441220

申请日：2003-05-20

申请人： Katsuhiro Mita ,  Atsushi Yasuda

发明人： Katsuhiro Mita ,  Atsushi Yasuda

IPC分类号： B60T11/20 ,  B60T11/16 ,  B60T13/565 ,  B60T13/567

CPC分类号： B60T11/16 ,  B60T13/565

摘要： Disclosed is a master cylinder wherein a seal member is given plural seal functions to reduce the number of seal members for partitioning a drain portion of the master cylinder, a constant-pressure chamber of a booster and the atmosphere from one another, so that the master cylinder is simplified in construction and reduced in manufacturing cost. When a piston is operated by an output shaft of the booster attached to a booster mounting surface of a cylinder body, the operating fluid from the fluid pressure chamber partitioned by a fluid-tight seal member is supplied to a brake system. An annular complex seal member is fit in an internal seal stepped portion which is formed by radially expanding an opening portion of the cylinder which opens to a booster mounting surface. A slide seal portion of the complex seal member partitions a drain portion behind the fluid-tight seal member from the constant-pressure chamber of the booster through sliding contact with the piston. An air-tight seal portion of the complex seal member partitions the constant-pressure chamber from the atmosphere through abutting engagement with the front end surface of the booster. Further, a fixed seal portion of the complex seal member partitions the drain portion from the atmosphere through abutting engagement with the internal surface of an internal seal stepped portion.

摘要翻译： 公开了一种主缸，其中密封构件具有多个密封功能，以减少用于分隔主缸的排水部分的密封构件的数量，增压器的恒压室和彼此的气氛，使得主缸 气缸的结构简化，制造成本降低。 当活塞由连接在气缸本体的增压器安装面上的增压器的输出轴进行动作时，由流体密封构件分隔的流体压力室的工作流体供给制动系统。 环形复合密封构件配合在通过径向扩大开放到增压器安装表面的气缸的开口部分形成的内部密封阶梯部分中。 复合密封构件的滑动密封部分通过与活塞的滑动接触将流体密封构件后面的排水部分与助力器的恒压室隔开。 复合密封构件的气密密封部分通过与增压器的前端表面的抵靠接合将恒压室与大气隔开。 此外，复合密封构件的固定密封部分通过与内部密封阶梯部分的内表面的抵接接合而将排水部分与大气分隔开。

公开(公告)号：US20050115237A1

公开(公告)日：2005-06-02

申请号：US10997914

申请日：2004-11-29

申请人： Kaoru Tsubouchi ,  Katsuhiro Mita ,  Koji Suzuki

发明人： Kaoru Tsubouchi ,  Katsuhiro Mita ,  Koji Suzuki

IPC分类号： B60T11/16 ,  B60T11/20 ,  B60T11/22 ,  B60T11/232 ,  B60T11/236 ,  F16J15/32

CPC分类号： B60T11/236 ,  B60T11/22 ,  B60T11/232

摘要： A master cylinder includes a primary cup received in a groove formed in the inner wall of the cylinder body. Projections are formed on a radially inner portion of the cup so as to protrude forwardly from the front end of the radially inner portion. The projections are adapted to be pressed against the front end wall of the cup-receiving groove and elastically deformed under a pressure difference produced between the front and rear ends of the cup when the piston is returned quickly, allowing the cup to advance in the cup-receiving groove. When the cup advances in the groove, a fluid passage is defined between a base portion of the cup and the rear end wall of the groove. Brake fluid from the reservoir flows through this fluid passage, through a gap formed between a radially outer portion of the cup and the radially outer wall of the groove when the radially outer portion of the cup is deformed by the fluid flow, and through a fluid passage defined between the cup and the front end wall of the groove by the projections.

摘要翻译： 主缸包括容纳在形成在缸体的内壁中的槽中的主杯。 在杯的径向内部形成突起，从而从径向内部的前端向前突出。 突起适于压靠杯容纳槽的前端壁，并且当活塞快速返回时在杯的前端和后端之间产生的压力差弹性变形，允许杯在杯中前进 接收槽 当杯子在槽中前进时，在杯的基部和槽的后端壁之间限定流体通道。 来自储存器的制动液体通过该流体通道，当杯的径向外部部分被流体流动变形时，穿过形成在杯的径向外部部分与凹槽的径向外壁之间的间隙，并通过流体 通过突出部限定在杯和槽的前端壁之间的通道。