JPH0481865U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a diagram schematically showing the structure of an antilock modulator in a first embodiment of the present invention. FIG. 2A is a diagram schematically showing the structure of an antilock modulator according to a second embodiment of the present invention, and FIGS. 2B and 2C are diagrams showing the cylinder block 22 of the control valve 21 of the same embodiment in the antilock state. FIG. 3 is a cross-sectional view sequentially showing the positional relationship between the spool 23 and the spool 23. FIG. FIG. 3A is a diagram schematically showing the structure of an antilock modulator according to a third embodiment of the present invention, and FIG. 3B is an enlarged cross-sectional view showing an orifice-integrated check valve 41 in the third embodiment. be. FIG. 4 is a diagram schematically showing the structure of a conventional reflux type anti-lock modulator. In the figure, 1 is a brake pedal, 2 is a master cylinder, 3 is a wheel brake, 4 is a wheel cylinder, 5, 7, 9 are main channels, 6, 8 are electromagnetic valves, 10
is a reservoir, 12 is a pump, 13 is a damping chamber, 14
is the orifice, 14 is the return point, 16 is the check valve, 2
1 is a control valve, and 41 is an orifice-integrated check valve. In addition, in the figures, parts with the same reference numerals indicate the same or equivalent elements.

Claims (1)

[Claims for Utility Model Registration] (1) Provided in the middle of the main flow path from the master cylinder to the wheel brakes, the pressure of the wheel brakes can be reduced by discharging hydraulic fluid from the main flow path in response to an antilock activation signal. A fluid pressure adjustment means for controlling pressure reduction; a pump that suctions and pressurizes the discharged working fluid and returns it to the main channel; and a circulation channel connecting the outlet of the pump and a return point in the middle of the main channel. , an anti-lock modulator having a damping chamber provided in the middle of the return flow path and storing a certain amount of working fluid, and an orifice provided between the damping chamber and the return point of the return flow path, An anti-lock modulator, characterized in that a check valve is provided between the orifice and the return point of the reflux path, the forward direction being from the orifice to the return point. (2) The anti-lock modulator according to claim 1, wherein the orifice and the check valve are integrally constructed. (3) The anti-lock modulator according to claim 2, wherein the orifice and the check valve, which are integrally formed, are provided with a flared seat surface for a hydraulic fluid inlet.