JPH04107159U - reservoir - Google Patents

Abstract

(57) [Summary] [Purpose] At the bottom of the reservoir body, which has a hydraulic fluid inlet at the top that is closed with an openable and closable cap to form a fluid chamber,
A plurality of fitting cylindrical parts are provided which are formed into a cylindrical shape that protrudes into the liquid chamber and have an inlet at the upper end, and each of the fitting cylindrical parts has an upper end part of a solenoid valve having a release port at the upper end. In the reservoirs to which the solenoid valves are fitted, direct impact of the hydraulic fluid from the electromagnetic valves onto the caps is avoided to prevent fluid leakage from the caps. [Structure] A cylindrical separator that is closed at one end and has an opening 50c at the other end that opens into the liquid chamber 33 in the direction opposite to the hydraulic fluid inlet 45, covering the entire inlet 36. 50 is provided within the reservoir body 30.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention has a hydraulic fluid inlet at the top that is closed with an openable and closable cap, and the fluid chamber At the bottom of the reservoir body forming a cylindrical shape that protrudes into the liquid chamber. A plurality of fitting cylindrical portions each having an inlet are provided at the upper end thereof, and each of the fitting cylindrical portions includes: The upper end of the solenoid valve with a release port at the upper end is connected to the reservoir that is fitted respectively. Ru.

0002

[Conventional technology]

Such a reservoir is disclosed, for example, in Japanese Utility Model Application Publication No. 2-1212. It is used in vehicle anti-lock brake devices, etc. When the brake control condition is released, the hydraulic fluid is returned from the solenoid valve into the reservoir.

0003

[Problem that the idea aims to solve]

By the way, the hydraulic fluid from the solenoid valve suddenly flows into the reservoir from the inlet. In the above-mentioned conventional type, the upper end of the cylindrical part that extends upward and is continuous with the fitting cylindrical part is horizontally The hydraulic fluid flows rapidly from the inlet into the fluid chamber by opening in the same direction. The direction of flow is changed from upward to sideways. However, that's all It is difficult to completely change the flow direction of the hydraulic fluid sideways, and the hydraulic fluid may flow diagonally. The liquid flows upward and directly hits the upper cap, causing liquid to leak from the cap. Sometimes.

0004 The present invention was developed in view of the above circumstances, and is designed to control the flow of hydraulic fluid from a solenoid valve. A reservoir designed to avoid direct impact on the cap and prevent liquid leakage from the cap. The purpose is to provide

[0005]

[Means to solve the problem]

In order to achieve the above object, according to a first feature of the present invention, one end is occluded. At the other end, there is an opening opening into the liquid chamber in the direction opposite to the hydraulic fluid inlet. A cylindrical separator that covers the entire inlet is provided inside the reservoir body. Ru.

[0006] According to a second feature of the present invention, in addition to the configuration of the first feature, a separate An outlet is provided in the reservoir body on the side opposite to the opening of the separator, and an outlet is provided in the upper part of the separator. The inner surface is formed into an inclined surface that becomes upward toward the opening.

[0007]

【Example】

The drawings below show how the present invention is applied to a vehicle's anti-lock brake control unit. An example will be described below.

[0008] 1 to 5 show an embodiment of the present invention, and FIG. 1 shows an anti-lock block. FIG. 2 is a cutaway side view of the rake control unit, viewed from arrow 1 in FIG. 2; FIG. A two-line cross-sectional view, FIG. 3 shows a simplified configuration of the anti-lock brake control unit. 4 is a plan view of the lower half of the reservoir taken along line 4-4 in FIG. 2, and FIG. FIG. 5 is a cross-sectional view of the reservoir along line -5.

First, in FIGS. 1 and 2, an anti-lock brake control unit U mounted on a vehicle is sandwiched between a modulator body 6 supported by a vehicle body (not shown), and the body 6 and a support plate 7 so as to be aligned in a straight line. The left front wheel brake control solenoid valve V _FL , the right front wheel brake control solenoid valve V _FR , and both rear wheel brake control solenoid valves _VR are lined up, and are supported above the solenoid valves V _FL , V _FR , and V _R . A synthetic resin reservoir R supported on a plate 7 is provided.

[0010]The modulator body 6 includes an actuation mechanism built-in part 6a and a support part 6b extending laterally from a lower part of the actuation mechanism built-in part 6a, which are integrally connected. Further, each electromagnetic valve V _FL , V _FR , _VR is interposed between the support portion 6b of the modulator body 6 and the reservoir R.

[0011] Each solenoid valve V_F.L.,V_FR,V_Rhave basically the same structure, cylindrical A small-diameter first cylindrical portion 8a is attached coaxially to the upper end of the valve cylinder 8, which is formed in a shape, via a shoulder portion 8b. A second cylindrical portion 8d with a small diameter is coaxially provided at the lower end of the valve cylinder 8 via a shoulder portion 8c. A third cylindrical portion 8e that protrudes and has a smaller diameter than the second cylindrical portion 8d is the second cylindrical portion 8d. coaxially protrudes from the lower end of the On the other hand, in the support portion 6b of the modulator body 6 The top surface shows each solenoid valve V_F.L.,V_FR,V_RThe shoulder portion 8c is formed into a flat surface to be abutted. The upper surface of the support portion 6b has a first fitting hole 9 into which the second cylindrical portion 8d is fitted. and a second fitting hole 10 into which the second cylindrical portion 8e is fitted, each electromagnetic valve V_F.L.,V_FR,V _R The outer surface of the second cylindrical portion 8d is coaxially bored at positions corresponding to the cylindrical portion 8d. A sealing member 11 that contacts the inner surface of the first fitting hole 9 is fitted, and the outer surface of the second cylindrical portion 8e is A sealing member 12 that contacts the inner surface of the second fitting hole 10 is fitted onto the surface. Moreover, the first The depth of the first fitting hole 9 is set longer than the axial length of the second cylindrical portion 8d.

[0012] The support plate 7 is formed into a flat plate shape, and three insertion holes 13 are formed in the support plate 7, through which the first cylindrical portions 8a of the solenoid valves V _FL , V _FR , _VR are inserted. be done. Further, each of the electromagnetic valves V _FL , V _FR , _VR is covered with a cover 16 having an elliptical cross-sectional shape, and a clamping collar 16 a projecting inward is provided at the upper end of the cover 16 . With the third cylindrical portion 8e fitted into the second fitting hole 11 and the second cylindrical portion 8d fitted into the first fitting hole 9, each electromagnetic valve V _FL , V _FR , V _R The first cylindrical portion of each solenoid valve V _FL , V _FR , _VR 8a is inserted into each insertion hole 13, bolts 14 that pass through, for example, four cylindrical spacers 15 interposed between the support plate 7 and the support part 6b are screwed into the support part 6b, and each bolt 14 is inserted into the support part 6b. By tightening the head 14a until it engages with the support plate 7, each solenoid valve V _FL , V _FR , _VR is sandwiched between the support plate 7 and the support part 6b and is covered with the cover 16. .

[0013] In this way, with each solenoid valve V _FL , V _FR , _VR sandwiched between the support plate ₇ and the support part _6b , _the second cylindrical part 8d and The third cylindrical portion 8e and the inner surface of the first fitting hole 9 form an annular chamber 17 that faces the lower end surface of the second cylindrical portion 8d.

Referring also to FIG. 3, the operating mechanism built-in portion 6a of the modulator body 6 includes a left front wheel modulator that operates to adjust braking fluid pressure from a master cylinder (not shown) and apply it to a brake device (not shown). M _FL , a right front wheel modulator M _FR , a left rear wheel modulator M _RL and a left rear wheel modulator M _RR are built in, respectively. Each of the modulators M _FL , M _FR , M _RL , and M _RR is provided with a control hydraulic pressure chamber 18, and the control hydraulic pressure from the hydraulic pressure source 19 acts on these control hydraulic pressure chambers 18. Each modulator M _FL , M _FR , M _RL , M _RR operates to reduce the brake fluid pressure.

The hydraulic pressure source 19 includes a hydraulic pump 20 that pumps hydraulic fluid from the reservoir R, and an accumulator 21 connected to the hydraulic pump 20. Further, the support portion 6b of the modulator body 6 has a high pressure path 22 leading to the hydraulic pressure source 19, a control hydraulic pressure chamber 18 of the modulators M _FL and M _FR for both front wheels, and corresponding to the solenoid valves V _FL and V _FR, respectively. The control hydraulic pressure passages 23 _FL and 23 _FR that individually communicate between the annular chambers 17 and the control hydraulic pressure chambers 18 of the modulators M _RL and M _RR for both rear wheels are commonly connected to the annular chamber 17 corresponding to the solenoid valve _VR . A control hydraulic pressure path _23R communicating therewith is bored.

Inside the valve cylinder 8 of each electromagnetic valve V _FL , V _FR , _VR are a normally closed inlet valve 24 and a normally open outlet valve 25 disposed above the inlet valve 24 . Each is accommodated. Further, in each of the solenoid valves V _FL , V _FR , V _R , an inlet port 26 communicating with the high pressure path 22 is provided at the lower end of the third cylindrical portion 8e, and an outlet communicating with the annular chamber 17 is provided at the lower end of the second cylindrical portion 8d. A port 27 is provided, and a release port 28 is provided at the upper end of the first cylindrical portion 8a. Thus, the inlet valve 24 is opened in an energized state to allow communication between the inlet port 26 and the outlet port 27, and the outlet valve 25 is closed in an energized state to allow communication between the outlet port 27 and the release port 28. Can be shut off.

[0017] Referring to FIGS. 4 and 5 together, the reservoir body 30 of the reservoir R has an upper portion. A synthetic resin lower half body 31 having an open bottomed cylindrical shape and an upper end opening of the lower half body 31 It is also constructed by welding together the synthetic resin upper half body 32 formed correspondingly. A liquid chamber 33 is formed within the reservoir body 30. i.e. lower half 3 1 and the lower end of the upper half body 32 are provided with flange portions 31 having mutually corresponding shapes. a, 32a are formed, and their flange parts 31a, 32a are welded to each other. By doing so, the reservoir body 30 is formed. This reservoir body 30 has a plurality of For example, it is fastened onto the support plate 7 by two screw members 39.

[0018] At the bottom of the reservoir body 30, that is, at the bottom of the lower half 31, each electromagnetic valve V_F.L.,V _FR ,V_RThe upper end portion, that is, the portion of the first cylindrical portion 8a that protrudes upward from the support plate 7. To fit each solenoid valve V_F.L.,V_FR,V_R3 lined up in a straight line along the arrangement direction of Two fitting cylinder portions 34 are provided so as to protrude into the liquid chamber 33, and each solenoid valve V_F.L.， V_FR,V_RThe outer surface of the first cylindrical portion 8a is provided with a cylinder that contacts the inner surface of the fitting cylindrical portion 34. The roll members 35 are fitted respectively. Each fitting cylinder portion 34 forms an inlet 36 It is basically formed into a bottomed cylindrical shape with a small-diameter introduction cylinder 34a coaxially provided at the upper end closing part. There is metal reinforcement inside each fitting cylinder part 34 except for each introduction cylinder part 34a. The members 37 are molded together, and each reinforcing member 37 is connected to the lower half 31. It is integrally connected to a metal connecting plate 38 that is molded to the bottom of the.

[0019] Also, at the bottom of the reservoir body 30, that is, the bottom of the lower half 31, each fitting cylinder An outflow port 40 is provided at one end side along the arrangement direction of the portion 34, and the outflow port 40 is connected to the outflow port 40. A connecting pipe 41 extending downward is integrally connected to the lower half body 31. Then the connection Pipe 41 is connected to hydraulic pump 20 shown in FIG. Furthermore, the bottom of the lower half body 30 In order to insert the head 14a of the bolt 14 projecting upward from the support plate 7, Four recesses 42 are provided to protrude upward, and a recess for covering the support plate 7 is provided. A skirt portion 43 is provided.

At the top of the reservoir body 30, that is, at the top of the upper half body 32, a cylindrical portion 44 that projects upward at a position corresponding to the solenoid valve V _FR is provided to form a hydraulic fluid inlet 45. A cap 46 that opens and closes the hydraulic fluid inlet 45 is screwed onto the upper end of the cylindrical portion 44 . Further, a flange 47 projecting inward is provided at the lower end of the cylindrical portion 44 , and a filter 48 sandwiched between the flange 47 and the cap 46 is disposed within the hydraulic fluid inlet 45 .

[0021] Inside the reservoir body 30, a synthetic resin separator 50 that covers all the inlets 36 is fixed. determined. This separator 50 has a rectangular cross-sectional shape, and the fitting cylinder portions 34 are arranged in a rectangular shape. It is formed in a cylindrical shape extending along the column direction, and the lower part of the separator 50 has a A cylindrical tube into which the upper end introduction tube portion 34a of each fitting tube portion 34 is fitted. A portion 50a is provided in a protruding manner. In addition, in the separator 50, the arrangement of each fitting cylinder portion 34 is One end along the direction is closed, while the other end is closed in the direction opposite to the hydraulic fluid inlet 45. An opening 50c is provided that opens into the liquid chamber 33 toward the The upper inner surface 50b of the rotor 50 is separated from the opening 50c side, that is, from the outlet 40. It is formed into an inclined surface that gradually moves upward.

[0022] Such a separator 50 has one end side, that is, the outflow port 40 side. and the baffle plate 51 extending upward, and the other end side, that is, the opening 50c side, on both sides and A baffle plate 52 that extends upward, and a baffle plate that extends both sides and upward at the longitudinally intermediate portion. 53 are each provided integrally. Moreover, at both ends of the baffle plate 52, the baffle plate A pair of engagement members extending vertically and protruding from the inner surface of the lower half body 31 at positions corresponding to 52. Engagement grooves 55 that engage the mating protrusions 54 are provided to extend vertically. However, Before welding the lower half body 31 and the upper half body 32 to each other, a conductor is introduced into each cylinder portion 50a. Fit the cylindrical portions 34a into each other, and insert the engaging protrusions 54 into the respective engaging grooves 55. By keeping them engaged, the position of the separator 50 in the lower half 31 can be adjusted. The upper ends of the baffle plates 51 and 52 will be temporarily fixed, and in that state the upper ends of the baffle plates 51 and 52 will be attached to the lower half body 31. It becomes the same level as the flange part 31a in the.

[0023] On the other hand, the upper half body 32 has a flange portion 32 at a position corresponding to the baffle plates 51 and 52. Ribs 56 and 57 are integrally provided and extend downward to a position corresponding to a. These ribs 56 and 57 prevent interference when welding the flange portions 31a and 32a to each other. It is welded to the magic plates 51 and 52. As a result, the lower half 31 and the upper half 32 are in phase with each other. A separator inside the reservoir body 30 when forming the reservoir body 30 by mutual welding. The position of 50 is fixedly determined. Moreover, the width of the rib 57 is the same as that of the baffle plate 52. In order to avoid partitioning the inside of the liquid chamber 33 due to welding, the baffle plate 52 is It is set smaller than the width. As a result, the ribs 57 and baffle plates 52 are welded together. However, the hydraulic fluid can flow on both sides of the rib 57 within the fluid chamber 33.

Next, to explain the operation of this embodiment, in each of the solenoid valves V _FL , V _FR , _VR , the outlet valve 25 is closed and the inlet valve 24 is opened, and then the outlet valve 25 is opened. Then, the hydraulic fluid from the control hydraulic pressure chamber 18 is returned to the reservoir R through the release port 28, and at this time, the hydraulic fluid from the release port 28 flows upward through the inlet 36 at a relatively high speed. and flows into the liquid chamber 33. However, each inlet 36 is covered with a separator 50, and the working fluid from the release port 28 flows inside the separator 50 to the side opposite to the outlet 40, and flows into the liquid chamber 33 from the opening 50c. . Moreover, since the opening 50c opens in the opposite direction to the hydraulic fluid inlet 45, the hydraulic fluid from the release port 28 can be prevented from directly colliding with the cap 46 that closes the hydraulic fluid inlet 45. Furthermore, the working fluid that has flowed into the fluid chamber 33 is prevented from flowing directly toward the outlet 40 by the baffle plates 51, 52, and 53, and the flow rate of the working fluid toward the outlet 40 is suppressed. Therefore, disturbance of the level of the hydraulic fluid in the liquid chamber 33 can be avoided as much as possible, and leakage of the hydraulic fluid from the cap 46 can be prevented as much as possible.

Moreover, since the upper inner surface 50b of the separator 50 is formed to be inclined upward toward the opening 50c side, that is, the side opposite to the outflow port 40, from the solenoid valves V _FL , V _FR , _VR Even if air is mixed into the returning working fluid, it is possible to prevent the air from remaining in the separator 50 and to avoid as much as possible the air being sucked from the outlet 40 to the hydraulic pump 20. can.

[0026]

[Effect of the idea]

As described above, according to the first feature of the present invention, one end of the reservoir body is closed. At the same time, the other end has an opening that opens into the fluid chamber in the direction opposite to the hydraulic fluid inlet. Since a cylindrical separator with an opening and covering the entire inlet is provided, the This prevents the hydraulic fluid returning from the solenoid valve into the reservoir from directly colliding with the cap. This can prevent liquid leakage from the cap.

[0027] According to a second feature of the present invention, in addition to the configuration of the first feature, a separate An outlet is provided in the reservoir body on the side opposite to the opening of the separator, and an outlet is provided in the upper part of the separator. The inner surface is formed into an inclined surface that moves upward toward the opening, so electromagnetic Even if air is mixed in the hydraulic fluid returning from the valve, the air will not enter the separator. It is possible to prevent the liquid from remaining and being sucked into the outlet.

[Brief explanation of drawings]

FIG. 1 is a cutaway side view of an anti-lock brake control unit according to an embodiment, and is a view taken in the direction of arrow 1 in FIG. 2;

FIG. 2 is a sectional view taken along line 2-2 in FIG. 1;

FIG. 3 is a diagram showing a simplified configuration of an anti-lock brake control unit.

4 is a plan view of the lower half of the reservoir taken along line 4-4 of FIG. 2; FIG.

FIG. 5 is a cross-sectional view of the reservoir taken along line 5-5 in FIG. 4;

[Explanation of symbols]

28...Release port 30...Reservoir body 33...Liquid chamber 34...Fitting cylinder part 36...Inflow port 40...Outflow port 45...Working fluid inlet 46... Cap 50... Separator 50b... Upper inner surface 50c... Opening V _FL , V _FR , V _R ... Solenoid valve R... Reservoir

Claims (2)

[Scope of utility model registration request] 1. A liquid chamber (33) is provided at the bottom of a reservoir body (30) which has a hydraulic fluid inlet (45) at the top that is closed with an openable/closable cap (46) to form a liquid chamber (33). )
A plurality of fitting cylindrical parts (34) are provided which are formed into a cylindrical shape that protrudes into the interior and have an inlet (36) at the upper end, and each of the fitting cylindrical parts (34) has an opening at the upper end. In the reservoirs into which the upper ends of the electromagnetic valves (V _FL , V _FR , V _R ) each having a port (28) are fitted, one end is closed and the other end is connected to the hydraulic fluid inlet (45). An opening (50) opens into the liquid chamber (33) in the opposite direction.
c) A cylindrical separator (50) covering the entire inlet (36) is provided in the reservoir body (30). Claim 2: Opening (50c) of separator (50)
On the opposite side of the reservoir body (30) there is an outlet (40).
is provided, and the upper inner surface (50b) of the separator (50)
2. The reservoir according to claim 1, wherein the reservoir is formed on an inclined surface that becomes upward toward the opening (50c).