JP2006008052A - Load response type brake fluid pressure control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance working efficiency at on-vehicle time of a device in a load response type brake fluid pressure control device for a vehicle. <P>SOLUTION: The device is provided with a control valve 10 fixed to a spring up member 91 by a body 11; a lever element 20 arranged opposed to an operation piston 12 vertically movably installed on the body 11 and engageable/disengageable with the operation piston 12; and a link mechanism 30 turnably installed on a pivot part 22b of the lever element in a vertical direction and turnably installed on a spring lower member 93 in the vertical direction. The link mechanism 30 is provided with a first link 31 turnably installed on the pivot part 22b of the lever element in the vertical direction; a second link 32 turnably installed on the first link in the vertical direction and turnably installed on the spring lower member 93 in the vertical direction; and a connection nut 35 capable of restricting/releasing turning in the connection part of both links 31, 32. The lever element 20 and the body 11 can be connected/released by a positioning fixture 40. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a brake fluid pressure control device employed in a vehicle, and more particularly, to a load response type brake fluid pressure control device capable of reducing the brake fluid pressure applied to a rear wheel in accordance with a vehicle load.

This type of load-responsive brake fluid pressure control device is disclosed in, for example, Patent Document 1 or 2 below, and includes a control valve assembled to a sprung member of a vehicle and a sprung member of the vehicle at one end. It is provided with a bar spring which is assembled so as to be rotatable in the vertical direction, and is assembled to an unsprung member of the vehicle via a link mechanism at the other end, and the vehicle load detected by the bar spring is a bar spring. To the operation piston of the control valve. The bar spring is assembled to the body of the control valve at the base end so as to be swingable in the vertical direction, and functions as a lever element that can be engaged with and detached from the operating piston of the control valve. .
Japanese Patent Publication No. 2-38419 Japanese Utility Model Publication 63-960

  In the load response type brake hydraulic pressure control device shown in each of the above-mentioned publications, the fact that a predetermined gap is provided between the operating piston and the rod spring of the control valve when the device is assembled to the vehicle is utilized. Then, a conductive gap bar is inserted into the gap between the operating piston of the control valve and the bar spring, and the gap bar and the operating piston of the control valve are closed by contact between the gap bar and the operating piston. An electric signal circuit for contact detection is configured, and the control valve is moved relative to the sprung member of the vehicle so that the control valve is fixed to the sprung member of the vehicle at a boundary position between the closed circuit and the open circuit of the electric signal circuit for contact detection. I have to.

  Therefore, in the load response type brake hydraulic pressure control device shown in each of the above-mentioned publications, it is necessary to prepare an electrical signal circuit for contact detection (conduction equipment) when the device is assembled to a vehicle. The contact detection electrical signal circuit is configured such that the control valve is moved vertically to the vehicle sprung member and the control valve is fixed to the vehicle sprung member at the boundary position between the closed circuit and the open circuit of the contact detection electrical signal circuit. A complicated adjustment work for fixing the control valve while checking the detection result is necessary, and the mounting property on the vehicle is poor.

  Instead of using the conductive gap bar, a predetermined load is applied to the sprung member of the vehicle, and the sprung member and the unsprung portion of the vehicle are applied by an amount corresponding to a predetermined gap between the operating piston of the control valve and the bar spring. It is possible to perform the above-described adjustment work in a state in which the distance between the members is reduced. In this case, in addition to the contact detection electric signal circuit (conduction equipment), the sprung member of the vehicle It is necessary to prepare a load application facility for applying a predetermined load to the battery.

  In order to solve the above-mentioned problems, the present invention is opposed to a control valve fixed to a sprung member or unsprung member of a vehicle by a body, and an operating piston assembled to the body of the control valve so as to be movable up and down. The lever element is mounted at the base end so as to be swingable in the vertical direction on the body, and can be engaged with and disengaged from the operating piston. A link mechanism that is assembled so as to be pivotable in the direction and pivotable in the vertical direction to the unsprung or sprung member of the vehicle at the other end is provided in accordance with the load of the vehicle. In a load response type brake hydraulic pressure control device capable of reducing the brake hydraulic pressure applied to the wheel, the link mechanism is assembled to the swinging portion of the lever element so as to be pivotable at one end. One link and the other end of this first link A second link which is assembled to be pivotable in the vertical direction at the portion and is pivotally assembled to the unsprung or sprung member of the vehicle at the other end in the vertical direction; It is characterized in that the lever element and the body can be connected / released by a positioning jig, with a connecting tool capable of restricting / releasing the rotation of the part.

  In the load response type brake hydraulic pressure control device according to the present invention, the lever element is connected to the body of the control valve using a positioning jig, and the lever element is connected to the control valve body at the set position (the operating piston of the control valve and the piston). Temporarily fixed in a state in which there is a predetermined gap between the lever elements or in a special state where the gap between the operating piston of the control valve and the lever element is zero), and the link mechanism connector is released. In the initial state where the rotation restriction at the connecting portion of the first link and the second link is released, the body of the control valve is fixed to the sprung member (or unsprung member) of the vehicle, and the other end of the second link is fixed. It is assembled to the unsprung member (or sprung member) of the vehicle, and then the rotation of the connecting portion between the first link and the second link is restricted by the connecting mechanism of the link mechanism, and finally the positioning jig is removed. By, the assembly is completed to the vehicle.

  By the way, in the load response type brake hydraulic pressure control device according to the present invention, when the device is assembled to a vehicle, not only equipment such as an electric signal circuit for contact detection is required, but also a spring member (or spring) of the body. Fixing to the lower member), assembling the other end of the second link to the unsprung member (or the sprung member), connecting the first link and the second link with a connector, and removing the positioning jig. Since it can be easily assembled to the vehicle by simple operations such as operations, it is possible to improve workability when the device is mounted on a vehicle.

  In the load response type brake hydraulic pressure control device according to the present invention, in the initial state where the first link and the second link are not connected by the connecting tool, the first link rotates in the vertical direction with respect to the second link. Since it can be moved, it can be applied to the vehicle type in which the height difference between the portion where the body is fixed and the portion where the other end of the second link is assembled is the same, and the components are shared. It is possible.

  In carrying out the present invention, the lever element is assembled to the body at the base end portion so as to be swingable in the vertical direction, and can be engaged with and disengaged from the operating piston. A lever body that can be connected to and released from the lever, and a bar spring that is connected to the swinging portion of the lever body at one end and is rotatably assembled to the one end of the first link at the other end. It is also possible to have a configuration comprising In this case, the lever body is made of a material that is more rigid than the bar spring, so that the positioning accuracy of the lever element relative to the body by the positioning jig is higher than when the lever element is composed only of the bar spring. And the variation in characteristics of the device can be reduced.

  The present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a load response type brake fluid pressure control device according to the present invention. This brake fluid pressure control device is used by being assembled in a vehicle such as a truck. The lever element 20 and the link mechanism 30 are provided.

  The control valve 10 controls the brake fluid pressure to the rear wheel according to the load, and is known per se, and is fixed to the sprung member 91 of the vehicle with a plurality of bolts 92. A body 11 and an operating piston 12 assembled to the body 11 are provided. The operating piston 12 is assembled to the body 11 so as to be movable up and down, and has a lower end projecting out of the body 11.

  The lever element 20 is disposed so as to face the operating piston 12 of the control valve 10, and is assembled to the body 11 of the control valve 10 through a support pin 13 so as to be swingable in the vertical direction. 21 and a bar spring 22 are provided. The lever main body 21 is assembled to the body 11 via the support pin 13 at the base end portion 21a so as to be swingable in the vertical direction, and is engaged with the operating piston 12 by a projection 21b1 provided on the intermediate portion 21b. It can be detached and can be connected to and released from the body 11 with the positioning jig 40 indicated by the phantom line.

  The bar spring 22 is integrally connected to the swinging portion 21c of the lever main body 21 at one end 22a, and has a circular shape as the swinging portion of the lever element 20 as shown in FIGS. A curved other end 22b is attached to one end 31a of the first link 31 of the link mechanism 30 via a roller 33 and a pin 34 so as to be rotatable in the vertical direction.

  As shown in FIG. 1 and FIG. 3, the link mechanism 30 is assembled to the first link 31 described above and the other end 31b of the first link 31 so as to be rotatable in the vertical direction at one end 32a. The second link 32 that is attached to the unsprung member 93 of the vehicle via the clip 36 at the other end 32b so as to be rotatable in the vertical direction, and the rotation at the connecting portion between these links 31 and 32. Is provided with a connecting nut 35 capable of restricting and releasing.

  The connection nut 35 can fix (clamp) and release the other end 31b of the first link 31 between the hexagon flange 32a1 provided integrally with the one end 32a of the second link 32, The two links 32 are screwed into a male screw portion 32a2 provided at one end portion 32a. For this reason, when the connecting nut 35 is tightened with a predetermined torque, the first link 31 cannot be rotated with respect to the second link 32, and when the connecting nut 35 is loosened, the first link 31 becomes the second link. 32 can be rotated.

  As shown in FIGS. 1, 3, and 4, the clip 36 is formed in an L shape with resin and has a U-shaped attachment portion 36 a that is assembled to the projecting piece-like unsprung member 93. In addition, the intermediate portion 32c of the second link 32 has a holding portion 36b to which the second link 32 is elastically fitted and fixed. When the other end 32b of the second link 32 is fitted and fixed to the unsprung member 93, the clip 36 is assembled in advance to the unsprung member 93 by the U-shaped attachment part 36a. The other end portion 32b of the link 32 is fitted so as to penetrate the U-shaped attachment portion 36a and the unsprung member 93, whereby the intermediate portion 32c of the second link 32 is fitted and fixed to the holding portion 36b.

  In the brake fluid pressure control device of this embodiment configured as described above, the lever element 20 is connected to the body 11 of the control valve 10 using the positioning jig 40, and the lever element 20 is connected to the body 11 of the control valve 10. On the other hand, it is temporarily fixed at the set position shown in FIG. 1 (a state in which a predetermined gap is present between the operating piston 12 of the control valve 10 and the lever element 20), and the connection nut 35 of the link mechanism 30 is loosened and released. The body 11 of the control valve 10 is fixed to the sprung member 91 of the vehicle with the bolt 92 in the initial state where the rotation restriction at the connecting portion of the first link 31 and the second link 32 is released. The other end 32b of the two links 32 is assembled to the unsprung member 93 using the clip 36, and then the connection nut 35 of the link mechanism 30 is tightened with a predetermined torque, and the first link 31 is assembled. To restrict the rotation of the connecting portion of the second link 32, by removing the last positioning jig 40, the assembly is completed on the vehicle.

  By the way, in the brake fluid pressure control device of this embodiment, when assembling the device to the vehicle, facilities such as an electric signal circuit for contact detection are not necessary, and the body 11 is fixed to the sprung member 91. Simple operations such as work, assembly work of the other end 32b of the second link 32 to the unsprung member 93, connection work of the first link 31 and the second link 32 by the connection nut 35, removal work of the positioning jig 40, etc. Therefore, it is possible to improve the workability when the apparatus is mounted on a vehicle.

  In the brake fluid pressure control device of this embodiment, in the initial state where the first link 31 and the second link 32 are not connected by the connecting nut 35, the first link 31 is in the vertical direction with respect to the second link 32. Since it can be rotated at the same position, it can be applied to a vehicle model having a different height difference between a portion where the body 11 is fixed and a portion where the other end 32b of the second link 32 is assembled. It is possible to share parts.

  Further, in the brake fluid pressure control device of this embodiment, the lever element 20 is assembled to the body 11 so as to be swingable in the vertical direction at the base end portion 21a, and can be engaged with and disengaged from the working piston 12. A lever main body 21 that can be connected / released to / from the body 11 by a jig 40, and a swinging portion 21c of the lever main body 21 are integrally connected to one end 22a, and one end of the first link 31 is connected to the other end 22b. It is set as the structure provided with the bar spring 22 assembled | attached to the part 31a so that rotation in an up-down direction is possible. For this reason, the lever main body 21 is made of a material having higher rigidity than the bar spring 22 (for example, a steel material), so that the lever element 20 is formed by the positioning jig 40 as compared with the case where the lever element 20 is composed only of the bar spring. The positioning accuracy of the lever element 20 with respect to the body 11 can be increased, and the characteristic variation of the device can be reduced.

  In the above-described embodiment, the body 11 of the control valve 10 in the apparatus is fixed to the sprung member 91 of the vehicle, and the other end 32b of the second link 32 is assembled to the unsprung member 93 of the vehicle. Although implemented, the apparatus is turned upside down, and the body of the control valve in the apparatus is fixed to the unsprung member of the vehicle, and the other end of the second link is assembled to the sprung member of the vehicle. It is also possible.

  In the above-described embodiment, the case where the cross-sectional shape of the bar spring 22 (the cross-sectional shape perpendicular to the longitudinal direction) is circular has been described. However, the present invention is not limited to this. It may be rectangular, U-shaped, U-shaped or elliptical. In the case of a rectangle, a flat spring that is flat in the bending direction may be used.

It is a front view showing one embodiment of a load response type brake fluid pressure control device by the present invention. It is a side view which shows the relationship between the bar spring shown in FIG. 1, and a 1st link. It is a side view which shows the relationship between the 1st link, 2nd link, clip, unsprung member, etc. which were shown in FIG. It is a bottom view which shows the relationship between the clip and unsprung member shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Control valve, 11 ... Body, 12 ... Actuation piston, 20 ... Lever element, 21 ... Lever main body, 21a ... Base end part, 21b ... Intermediate part, 21c ... Swing part, 22 ... Bar spring, 22a ... One end part , 22b ... the other end (the swinging part of the lever element), 30 ... the link mechanism, 31 ... the first link, 31a ... one end, 31b ... the other end, 32 ... the second link, 32a ... one end, 32b ... The other end 35, a connecting nut (connector), 40, a positioning jig, 91, a sprung member, 93, an unsprung member

Claims (2)

  A control valve that is fixed to a vehicle sprung member or unsprung member by a body, and is disposed opposite to an operating piston that is assembled to the body of the control valve so as to be movable up and down. A lever element that is assembled so as to be able to swing in the direction, and can be engaged with and disengaged from the operating piston, and is attached to the swinging portion of this lever element so that it can be pivoted in the vertical direction at one end. Load response that can control the brake fluid pressure to the rear wheel to be reduced according to the load of the vehicle. In the type brake fluid pressure control device, the link mechanism is attached to the swinging portion of the lever element so as to be pivotable in the vertical direction at one end portion, and to the other end portion of the first link. It is assembled so that it can rotate in the vertical direction at one end. A structure comprising a second link which is assembled to the unsprung or sprung member of the vehicle at the end so as to be pivotable in the vertical direction, and a coupler capable of restricting / releasing pivoting at the coupling part of these two links And a load-responsive brake fluid pressure control device characterized in that the lever element and the body can be connected and released by a positioning jig. The load responsive brake hydraulic pressure control device according to claim 1, wherein the lever element is assembled to the body so as to be swingable in a vertical direction at a base end portion, and can be engaged with and detached from the operating piston. A lever main body that can be connected to and released from the body by the positioning jig, and one end connected to the swinging portion of the lever main body, and the other end is rotated in the vertical direction to one end of the first link. A load-responsive brake hydraulic pressure control device comprising a bar spring that is assembled so as to be movable.

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