• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Master cylinder comprising a housing (101) provided with a bore housing a primary piston (110) controlled by the actuator protruding from the bore. The housing is equipped with a brake light control comprising on the one hand an axis bore (XX) parallel to that (XX) of the bore receiving the piston (primary piston) (110) and, the bore ( 104) receiving a magnet whose movement is coupled to that of the piston (primary) and secondly, a Hall sensor (160) outside the housing detecting the movement of the magnet (147) to control the brake lights. The brake light control comprises a moving element (140) integral in translation with the primary piston (110) at the end thereof and comprising a fastener (143) removably attached to the end of the primary piston coming out of the housing and a rod (141) having an axis parallel to the axis (X1X1) of the bore (104), connected to the fastener (143) and whose end engaged in the bore (104) carries a magnet (147) to cooperate with the Hall sensor (160).
    公开号:FR3037548A1
    申请号:FR1555717
    申请日:2015-06-22
    公开日:2016-12-23
    发明作者:Masaki Shiwa
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The present invention relates to a master cylinder comprising a housing provided with a bore housing a primary piston controlled by the actuator and protruding from the bore, the housing, equipped with a control of fires. stopper having a bore axis parallel to that of the bore housing the piston (primary piston) and the bore receiving a magnet whose movement is coupled to that of the piston (primary) and a Hall sensor outside the housing detecting the displacement magnet to control the brake lights.
    [0002] State of the art There is already a tandem master cylinder equipped with a brake light switch constituted by a magnet slidably mounted in a bore of the master cylinder housing and whose axis is parallel to the bore of the master cylinder. cylinder in which slides the primary piston and the secondary piston. The magnet is pushed by a compression spring housed at the bottom of the bore and acting in the opposite direction to that of the actuation of the master cylinder for braking. The magnet is housed in a support attached to the end of a rod and which leaves the bore and meets a stop secured to the end of the primary piston projecting from the bore of the master cylinder. The rod is guided in a sleeve forming a sliding bearing attached to the end of the bore. A Hall sensor installed outside the master cylinder housing detects the position of the magnet when it is at rest and triggers the brake lights when the rod, pushed by the activated piston stop, leaves its rest position. by compressing the return spring. The latter pushes the magnet into the rest position when the thrust exerted by the primary piston of the master cylinder on the rod disappears at the end of braking.
    [0003] This master cylinder equipped with a brake light switch has the disadvantage of being relatively complicated both by its structure and by its operation. It is also sensitive to the clogging of the hole in which the magnet slides. In case of seizure of the magnet the situation will be interpreted as an output of the brake; 3037548 2 the stop lights will remain permanently on and will no longer signal a braking action to the follower driver. This master cylinder also has the disadvantage of being of a not only fragile structure for the stoplight switch but also complex because of this switch. OBJECT OF THE INVENTION The object of the present invention is to develop a servo brake equipped with a brake light switch for braking which is of simple construction and enables efficient and safe operation. DESCRIPTION AND ADVANTAGES OF THE INVENTION For this purpose, the subject of the present invention is a master cylinder of the type defined above, characterized in that the control of brake lights comprises a movable unit which is integral in translation from the primary piston to the engine. end thereof and having a fastener removably attached to the end of the primary piston exiting the master cylinder housing and a rod axis parallel to the axis of the bore, connected to the fastener and the end engaged in the bore carries a magnet to cooperate with the Hall sensor.
    [0004] The master cylinder according to the invention has the advantage of being a particularly simple embodiment resulting from the reduced number of parts making up the brake light switch, guaranteeing the correct operation and the reliability of the detection of the actuation. brake. In addition, the system is simple to implement and in case of defect it is easily replaceable simply clipped into the primary piston so that the entire crew with the magnet can easily remove from the master. cylinder to be replaced. According to another advantageous feature, the fastener is attached to the rear end of the primary piston exiting the master cylinder housing by a freely rotatable connection about the axis of the piston. This embodiment simplifies assembly and operation since no torque is likely to be transmitted by the eventual slight rotation of the master cylinder about its axis. This pivotal or rotational movement can not induce torque in the rod carrying the magnet and thus deflect the rod from the axis of the bore. According to another advantageous characteristic, the ring has a lateral tab to which is attached the head of the rod aligned on the axis of the bore which receives it. This side tab, although rigid to transmit the translational movement of the piston to the rod is simply a drive member. As upstream the ring is rotatably mounted relative to the primary piston, this tab is subjected to no torque by the ring and the tongues with their hook so that no torque is applied to the rod carrying the magnet. According to another advantageous characteristic, the section of the hooks is in the form of a right-angled triangle whose rear side of the right angle is perpendicular to the axis and its hypotenuse forms a ramp descending towards the axis towards the front and the groove a right angle triangle section having a straight side perpendicular to the axis and a hypotenuse constituting the front side of the groove, the second side of the rectangular vertex being the open side of the groove. This form of the hooks is very simple and advantageous for the establishment of the fastener formed by the ring which engages by simple pressure in the rear opening of the primary piston until the hooks are hooked into the an inner peripheral groove of triangular section forming a retaining surface preventing the extraction of the ring with its tongues and making it possible to pull the moving element in the direction of the actuation of the primary piston and thus of the tandem master cylinder in case braking. The return to the rest position is by the simple reverse movement of the master cylinder which pushes the mobile team and pulls the rod with its magnet in the opposite direction to the previous direction.
    [0005] According to another advantageous characteristic, the rear end of the sleeve of the primary piston has a conical inlet which facilitates the compression movement of the tongues of the ring of the moving equipment without the need to compress by a device the tabs for reducing the contour of the hook crown 3037548 4 for engagement in the rear end of the primary piston sleeve. According to an advantageous characteristic, the fastener formed of the ring and the tongues provided with the hooks and as well as the tab 5 and the rod carrying the magnet are made of a plastic material. This embodiment has the advantage of simplicity of manufacture and implementation. In addition, the crew added to the master cylinder is particularly light while having sufficient mechanical strength for operation.
    [0006] Drawings The present invention will be described in more detail below with the aid of embodiments of a tandem master cylinder shown in the accompanying drawings in which: FIG. 1 is a perspective view of a master Tandem cylinder according to the invention, whose pistons appear by transparency of the housing, Figure 2 is a perspective view of the primary piston and the moving element carried by the primary piston, shown without the housing, 20 FIG. 3 is a half-section of the master cylinder at the primary piston and partly of the secondary piston, FIG. 4 is a view in axial section of a variant of the rear end of the primary piston and of the hooking. of the movable element.
    [0007] DESCRIPTION OF EMBODIMENTS OF THE INVENTION By convention, for ease of description reference will be made hereinafter to the front and rear rear of the tandem master cylinder, the rear rear corresponding to the position of the primary piston and that of the actuator which controls the usual arrangement not shown, the elements of a master cylinder. Although the description given below applies to a tandem master cylinder, the invention is not limited to such a master cylinder and applies under the same conditions to a single master cylinder.
    [0008] FIG. 1 is a perspective view in transparency of a tandem master cylinder 100 showing through the housing 101, in its bore 102, the primary piston 110 and the secondary piston 120 with their cups 131-134 (seals). sealing). The primary piston 110 pushes on the secondary piston 120. With respect to the secondary piston 120, the primary piston 110 delimits the primary chamber 111 and the secondary piston 120 delimits the secondary chamber 121 at the end of the bore 102 in the the master cylinder housing 100. The secondary piston 120 rests against the bottom 103 of the secondary chamber 121 via a secondary spring 122 and the primary piston 110 bears against the secondary piston 120 by a primary spring 112. A retaining rod 125 limits the displacement of the secondary piston 120 against the thrust of the secondary spring 122 and another retaining rod 115 limits the extension movement of the primary piston 110 relative to the secondary piston 120 so that the return of the secondary piston and the primary piston to the rest position is precisely in relation to the brake fluid supply ports, in the rest position of the master cylinder 100.
    [0009] The extension of the primary piston 110 projecting from the bore 102 of the casing 101 of the master cylinder 100 is integral in translation with a moving element 140 formed of a rod connected by its rear end 14b to a fastener formed by the tab 142 of a ring 143 secured to the rear end of the primary piston 110.
    [0010] The front end 141a of the rod 141 carries a magnet 147. The housing 101 of the master cylinder has a bore 104 of axis X1X1 parallel to the axis XX of the bore 102 of the tandem master cylinder 100 and receives the end of the rod 141 with the magnet 147. A Hall sensor 160 is mounted on the housing 101 at the rest position of the front end 141b of the rod 101 with its magnet 147 to detect the beginning of the movement of the rod, that is to say that of the primary piston 110 of the tandem master cylinder 100: this corresponds to the detection of braking. The Hall sensor 160 is connected to a control circuit 161 which activates the stop lights 162.
    [0011] Figure 2 shows the primary piston 110 cut with its moving assembly 140 out of the housing 101 of the tandem master cylinder. Figure 2 taken in combination with the sectional view of the master cylinder 100 of Figure 3 provides a better understanding of the structure of the tandem master cylinder 100 according to the invention. The primary piston 110 is formed of a cylindrical sleeve 116 subdivided by a partition 117 into a front portion 110a and a rear portion 110b, each being open. Partition 117 provided at the rear with a centering cavity 118 receives the pusher head actuated to the brake force amplifier; the rear end 112a of the return spring 112 surrounding a guide sleeve 135 bears against the partition 127, primary chamber side 111. The guide sleeve 135 has a bottom through which the rod 115, whose head 115b widened is retained behind the bulkhead 15 of the sleeve 135, its front end 115a being fixed in a washer 118 for the support of the spring 112 and against which the wall 127 of the secondary piston 120 rests, the latter has a structure similar to that of the primary piston 110. Thus, the secondary piston 120 is a cylindrical sleeve 126 subdivided by a partition 127 leaving the front portion 120b and the rear portion 120a open each housing one end of a return spring (primary spring 112 / secondary spring 122 ). The primary piston 110 and the secondary piston 120 sliding in the bore 102 each have a ring of bores (such as the ring 119 of the primary piston 110 shown in Figure 2) for the supply of brake fluid from the brake fluid reservoir and by distribution grooves 105, 106 of the master cylinder housing; these grooves 105, 106 are isolated by the sealing cups 131-134 resting on the sleeve 116 of the primary piston 11 and that 126 of the secondary piston 120 to supply the chambers 111, 121 in the rest position of the tandem master cylinder and then isolate the two chambers 111, 121 with respect to the reservoir as soon as the primary piston 110 begins to be pushed and then compresses the brake fluid in the primary chamber 111 thus pushing the secondary piston 120; the latter isobarically compresses the brake fluid 3037548 7 in the primary chamber and in the secondary chamber 121 and in the two brake circuits connected thereto. The mobile assembly 140 generally presented above has a fastener formed of the ring 143 carrying lugs 144 terminated by hooks 145 of triangular section engaged by elastic deformation of the tongues in the open rear end. of the primary piston 110 whose cylindrical sleeve 116 is internally provided with a groove 150 of triangular section forming a hooking edge 151.
    [0012] The ring 143 carries the tab 142 to which is attached the rear end 141b of the rod 141. The front end 141a of the rod 141 carries a guide piece 146 holding the magnet 147 in the form of a sleeve on the rod 141. The rod 141 is engaged in the bore 104 in which it is guided by the piece 146. The rod 141 may comprise an intermediate guide piece 146a as shown in FIG. 2. On the outside, the casing 101 door Hall sensor 160 and the rod 141 has a length such that at rest (no actuation of the brake) the magnet 147 is in front of the sensor 160 which thus detects its rest position.
    [0013] As soon as the magnet, moved by the piston 110, leaves its detection position facing the sensor 160, this event is interpreted by the operating circuit 161 as a braking start triggering the stop lights 162. The link between the ring 143 and primary piston 110 is a hooking for transmitting the translational movement. This connection is free in rotation so that the rod 141 remains aligned with the axis X1X1 of the bore 104 and that even if the primary piston 110 pivots on itself, it applies no torque to the rod 141 and is not likely to deflect it. of its axis X1X1.
    [0014] The hooking / clipping of the ring 143 by its triangular hooks 145 in the groove 150 is done by the right-angled triangle section of the hooks 145 resting by their rear right side against the right edge 151 of the groove; this straight edge is oriented perpendicularly to the axis XX, which ensures that the primary piston 110 precisely pulls the rod 141 and its magnet 147 when the brake is actuated. The 3037548 8 conjugally shaped ramps of the section of the hook 145 and that of the groove 150 are inclined forwardly and towards the axis XX. FIG. 4 shows the enlarged detail of the moving element 240 associated with the (primary) piston 110. FIG. 4 shows the tabs 144 which are relaxed or only slightly compressed when the hooks 145 are engaged in the groove 150 in order to make a snap regular and definitive resistant to the movements back and forth of the primary piston 110. This connection is nevertheless removable because by compressing the tabs 10 can be released the hooks of the groove and extract the assembly formed by this plug composed of the ring of the tongues equipped with hooks, if necessary replace this part. The outer diameter of the tops and hooks of the tongue ring is greater than the diameter of the rear portion 116b of the sleeve 116 to effect the clip-on effect of the clip 140 in the manner of a capsule. The various elements 142, 143, 144, 145 of the moving element 140 are preferably made of a plastic material.
    [0015] 20 3037548 9 NOMENCLATURE 100 Master cylinder 101 Housing 102 Bore 5 103 Bottom of bore 104 Drilling 10 -106 Distribution groove 110 Primary piston 110a Back section 10 110b Front section 111 Primary chamber 112 Primary spring 112a Front section of the primary spring 112b Part back of primary spring 15 115 Retaining pin 116 Cylindrical sleeve 116a Ramp-shaped sleeve inlet 117 Cylinder sleeve partition 118 Thrust washer 20 119 Drill crown 120 Secondary piston 120a Front section 120b Rear section 121 Secondary chamber 25 122 Spring secondary 122a Rear section of secondary spring 122b Front section of secondary spring 125 Retaining pin 126 Cylindrical sleeve 30 127 Partition 129 Hole crown 131-134 Sections 135 Guide sleeve 140 Moving Crew 35 141 Rod 3037548 10 141a Front end 14 lb Rear end / head 142 Tab 143 Clip ring 5 144 Tab 145 Outer hook 146 Piece guide 146a intermediate guide 147 Magnet 10 150 Throat 160 Hall sensor 161 Operating circuit 162 Stop lights 15
    权利要求:
    Claims (6)
    [0001]
    CLAIMS 1 °) Master cylinder comprising a housing provided with a bore housing a primary piston controlled by the actuator and protruding from the bore, the housing, equipped with a brake light control comprising - a parallel axis drilling to that of the bore housing the piston (primary piston) and the bore receiving a magnet whose movement is coupled to that of the piston (primary) and a Hall sensor outside the housing detecting the displacement of the magnet to control the brake lights, master cylinder characterized in that the brake light control (162) comprises a movable element (140) integral in translation with the primary piston (110) at the end thereof and having a fastener (143). ) removably attached to the end of the primary piston (110) exiting the master cylinder housing and a rod (141) having an axis parallel to the axis (XIX ') of the bore (104), connected to the ring-shaped fastener (143), the engaged end of which s the bore (104 a) carries a magnet (147) to cooperate with the Hall sensor (160).
    [0002]
    2) Master cylinder according to claim 1, characterized in that the ring-shaped fastener (143) is attached to the rear end (110b) of the primary piston (110) coming out of the master housing (101). -cylinder, by a free connection in rotation about the axis) 0C piston (110).
    [0003]
    3) master cylinder according to claim 1, characterized in that the ring-shaped fastener (143) has a side tab 142 which is attached to the head (141b) of the rod (141) aligned with the axis (XiXi) of the bore (104).
    [0004]
    4) Master cylinder according to claim 3, characterized in that the ring-shaped fastener (143) has hooks (145) whose section is in the shape of a right triangle with a rear side of the right angle 3037548 12 perpendicular to the axis (XX) and its hypotenuse forming a ramp descending towards the axis (XX) towards the front (AV), and these hooks (145) are engaged in a groove (150) with section of triangle rectangle having a right side perpendicular to the axis (XX) and a hypotenuse constituting the front side of the groove, the second side of the rectangular vertex being the open side of the groove (150).
    [0005]
    Master cylinder according to claim 1, characterized in that the rear end of the sleeve (116) of the primary piston (110) has a conical inlet (116a).
    [0006]
    6. Master cylinder according to claims 2 and 4, characterized in that the fastener formed of the ring (143) and tabs (145) provided with hooks (145), the tab (142) and the rod (141) are made of a plastic material. 20
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    同族专利:
    公开号 | 公开日
    DE102016207839A1|2016-12-22|
    CN106257062A|2016-12-28|
    FR3037548B1|2019-05-17|
    US20160369824A1|2016-12-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2002036400A1|2000-10-31|2002-05-10|Continental Teves Ag & Co. Ohg|Signal transmitter comprising a hall sensor integrated in a master cylinder|
    FR2885108A1|2005-04-28|2006-11-03|Bosch Gmbh Robert|Master cylinder device for motor vehicle, has ferromagnetic ring placed at push rod displacing with primary piston inside master cylinder which has permanent magnet and magnetic field detector, where detector controls ignition of stoplight|
    EP2072969A1|2007-12-21|2009-06-24|Robert Bosch GmbH|Linear sensor with angle transmission and movement by cable|
    DE102008020934A1|2008-04-25|2009-10-29|Lucas Automotive Gmbh|Master brake cylinder arrangement with actuation detection for a motor vehicle brake system and motor vehicle brake system|
    EP2407361A1|2010-07-12|2012-01-18|Robert Bosch GmbH|Master cylinder device for a car|
    WO2013045154A1|2011-09-30|2013-04-04|Robert Bosch Gmbh|Brake booster device for a braking system of a vehicle, and method for producing a brake booster device for a braking system of a vehicle|
    DE102012022519A1|2012-11-16|2014-05-22|Lucas Automotive Gmbh|Master brake cylinder arrangement with actuation detection for a motor vehicle brake system|
    US4532856A|1984-02-03|1985-08-06|Tayco Developments, Inc.|End cap for fluid cylinder|
    FR2913937B1|2007-03-22|2009-05-01|Bosch Gmbh Robert|METHOD AND SERVOMOTOR FOR DETECTING THE BRAKE OF A VEHICLE AND METHOD OF MANUFACTURING SUCH A SERVOMOTOR|
    DE102010027308A1|2010-07-16|2012-01-19|Lucas Automotive Gmbh|Sensor assembly for a master cylinder|
    US9371844B2|2010-10-26|2016-06-21|Kelsey-Hayes Company|Hydraulic brake system with controlled boost|
    DE102012200649A1|2011-02-04|2012-08-09|Continental Teves Ag & Co. Ohg|Device for monitoring position and movement of brake pedal for braking system of motor vehicle, has position indicator to monitor position of brake pedal, which is guided in guide tube and secured parallel to housing of master cylinder|
    DE102011085740A1|2011-11-03|2013-05-08|Continental Teves Ag & Co. Ohg|Inductive displacement sensor|
    CN104245448B|2012-02-14|2017-03-08|大陆-特韦斯贸易合伙股份公司及两合公司|There is the position of the piston that can move along a straight line for non-contact type monitoring and the master cylinder of the device of motion|
    KR101702844B1|2014-02-27|2017-02-06|주식회사 만도|Brake master cylinder|
    KR101594318B1|2014-10-13|2016-02-16|주식회사 만도|Brake master cylinder|
    KR102345500B1|2015-05-06|2022-01-03|주식회사 만도|Brake master cylinder|DE102016005377A1|2016-05-04|2017-11-09|Fte Automotive Gmbh|Hydraulic cylinders, in particular master brake cylinders for hydraulic brake systems|
    DE102016014483A1|2016-12-06|2018-06-07|Lucas Automotive Gmbh|Master brake cylinder arrangement with position sensor element and coupling arrangement therefor|
    JP6437029B2|2017-03-17|2018-12-12|本田技研工業株式会社|Actuator and fluid pressure control circuit having the same|
    DE102020113523A1|2020-05-19|2021-11-25|Knorr-Bremse Systeme für Nutzfahrzeuge GmbH|Housing device for a braking device for a vehicle, tappet for a braking device, braking device with a housing device and a tappet and method for operating a braking device|
    法律状态:
    2016-06-21| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-23| PLSC| Publication of the preliminary search report|Effective date: 20161223 |
    2017-06-21| PLFP| Fee payment|Year of fee payment: 3 |
    2018-06-25| PLFP| Fee payment|Year of fee payment: 4 |
    2020-06-23| PLFP| Fee payment|Year of fee payment: 6 |
    2021-06-22| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1555717|2015-06-22|
    FR1555717A|FR3037548B1|2015-06-22|2015-06-22|MASTER CYLINDER TANDEM|FR1555717A| FR3037548B1|2015-06-22|2015-06-22|MASTER CYLINDER TANDEM|
    DE102016207839.9A| DE102016207839A1|2015-06-22|2016-05-06|Tandem master cylinder|
    US15/187,325| US20160369824A1|2015-06-22|2016-06-20|Tandem master cylinder|
    CN201610448084.4A| CN106257062A|2015-06-22|2016-06-21|Tandem master cylinder|
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