Patent Description:
The sealing structure of a control device is disclosed as, for example, the technique in <CIT> (referred to below as PTL <NUM>). In the sealing structure disclosed in PTL <NUM>, a groove is provided in a housing, a protrusion to be inserted into the groove is provided in a cover, and the groove is filled with a sealing agent. The sealing structure is completed by inserting the protrusion into the groove in this state.

In the case of this seal structure, the sealing agent or the adhesive may protrude onto the outer surface of the housing.

If the sealing agent or the adhesive protrudes onto the outer surface, a process for wiping the sealing agent or the adhesive is necessary, thereby increasing the production cost.

When the cover is bonded to the housing while achieving reduction in the production cost, the structure capable of preventing the adhesive from protruding onto the outer surface of the housing while improving an adhesive strength is necessary.

Prior art document <CIT> refers to a pressure control device for a vehicle which is configured to inhibit a displacement of a coil terminal part and a connecting member to each other by forming a magnetic path with upper and lower yokes mounted around bobbins on which a coil is wound in an electromagnetic coil part, mounting an elastic body between the lower yoke and the bobbin, and bringing the bobbin into contact with a part of a housing to inhibit the movement thereof. The underlying coils are wound on the electromagnetic coil parts and the electromagnetic coil parts comprise the bobbins, the upper yokes, and the lower yokes mounted around the bobbins for forming a magnetic path, and elastic bodies mounted between the lower yokes and the bobbins. The elastic bodies are, for example, the plate springs, and bring the bobbins into contact with a part of a coil housing. By the pressure of this elastic bodies, the movement in a vertical direction of the bobbins is inhibited. Further a part of the coil housing exists between the upper yokes and the bobbins. Whereby the stress in the electrical connection part of the electromagnetic coil part can be mitigated. Prior art document <CIT> shows a a brake pressure control device having a reliable sealing effect which lengthens the life span of the electrical and electronic parts. A solenoid valve cover includes a bowl-shaped cover housing and a valve cover. A bottom surface of the cover housing is inserted over a valve assembly of the solenoid valve in order to attach to the installation surface of a housing of a hydraulic unit. An attaching device of a coil assembly is provided around the valve assembly in the cover housing, and is commonly used for also attaching the cover housing. Prior art document <CIT> describes an electronic control apparatus that includes an electric motor including a rotor and a stator; a circuit board configured to drivingly control the electric motor; and a housing unit accommodating the electric motor and the circuit board. A vehicle-body attaching portion of the housing unit is attached and fixed to a vehicle body. The vehicle-body attaching portion is located on one side of the rotor with respect to an extending direction of the rotor. At least one of both surfaces of the circuit board is a component-mounting surface. The circuit board is fixed to the housing unit in a state where both surfaces of the circuit board extend along the rotor of the electric motor. A large-size electronic component is mounted on a vehicle-body-attaching-portion-side portion of a peripheral portion of the component-mounting surface which is close to the vehicle-body attaching portion. Prior art document <CIT> discloses a structure having a surface to which an adhesive, fed from a movable nozzle, is applied before connecting an object to the surface. The structure includes a guide groove provided on the surface in which the adhesive is to be applied, such that the nozzle may be moved along the guide groove to introduce the adhesive into the groove. Prior art document <CIT> proposes an alternative structure, wherein a sealing material is applied to circumferential grooves formed in main bodies to be attached to each other.

An object of the invention is to provide a structure capable of preventing an adhesive from protruding onto an outer surface of a housing while improving an adhesive strength when a cover is coupled to the housing in a vehicle brake fluid pressure control device.

The object underlying the present invention is achieved by a vehicle brake fluid pressure control device according to independent claim <NUM>. According to claim <NUM>, there is provided a vehicle brake fluid pressure control device,.

In addition and according to the invention, the protrusion further includes a projection that comes in contact with a surface of the top groove into which the protrusion is inserted.

The following measures may additionally be taken, too:.

Furthermore, a surface that forms the lower groove may be a coarse surface.

According to claim <NUM>, the protrusion of the cover is inserted into the adhesive having filled the top groove. Since the adhesive is surely attached to the protrusion, the adhesive strength is improved. Since the adhesive flows into the collecting groove when the cover is attached to the housing, the adhesive does not protrude onto the outer surface of the housing.

In addition the projection provided on the protrusion of the cover comes into slidable contact with the top groove of the attachment part, so a rattle can be prevented when the cover is attached to the housing.

In case of the above flange configuration, the adhesive is inserted into the small gap when the housing is assembled to the base body. Since the excess portion of the adhesive is collected in the small gap, there is no concern that the adhesive enters the inside of the housing.

In case of the above coarse-surface configuration, an anchor effect of putting the adhesive onto the coarse surface is exerted. This anchor effect prevents the adhesive from peeling from the surface of the lower groove, thereby improving the bonding performance of the adhesive.

An embodiment of the invention will be described with reference to the attached drawings.

It is assumed that a control device that controls the fluid pressures of a front wheel brake and a rear wheel brake is referred to as a dual-circuit vehicle brake fluid pressure control device and a control device that controls the fluid pressure of one of the front wheel brake and the rear wheel brake is referred to as a single-circuit vehicle brake fluid pressure control device.

As illustrated in <FIG>, a dual-circuit vehicle brake fluid pressure control device <NUM> includes a first master cylinder <NUM>, a first reservoir <NUM>, a first inlet control valve <NUM> that is a normally open solenoid valve, a first outlet control valve <NUM> that is a normally closed solenoid valve, a first pump <NUM>, a second master cylinder <NUM>, a second reservoir <NUM>, a second inlet control valve <NUM> that is a normally open solenoid valve, a second outlet control valve <NUM> that is a normally closed solenoid valve, a second pump <NUM>, a motor <NUM> that drives the first and second pumps <NUM> and <NUM>, a control device <NUM> that controls the driving of the motor <NUM> and controls the opening and closing of the first and second inlet control valves <NUM> and <NUM> and the first and second outlet control valves <NUM> and <NUM>, brake fluid lines A1, B1, C1, D1, and E1 of a first circuit and brake fluid lines A2, B2, C2, D2, and E2 of a second circuit that are provided in a base body <NUM> and through which a brake fluid flows.

The first master cylinder <NUM> pressurizes a hydraulic fluid in accordance with an operation of a brake lever <NUM> to produce a fluid pressure.

The first reservoir <NUM> temporarily reserves the hydraulic fluid released from a front wheel brake caliper <NUM>.

The first inlet valve <NUM> and the first outlet control valve <NUM> are assembly components provided between the first master cylinder <NUM> and the front wheel brake caliper <NUM>.

The first pump <NUM> is an assembly component that sucks the hydraulic fluid reserved in the first reservoir <NUM> and returns the hydraulic fluid to the first master cylinder <NUM>.

The second master cylinder <NUM> pressurizes the hydraulic fluid in accordance with an operation of a brake pedal <NUM> to produce a fluid pressure.

The second reservoir <NUM> temporarily reserves the hydraulic fluid released from a rear wheel brake caliper <NUM>.

The second inlet control valve <NUM> and the second outlet control valve <NUM> are assembly components provided between the second master cylinder <NUM> and the rear wheel brake caliper <NUM>.

The second pump <NUM> is an assembly component that sucks the hydraulic fluid reserved in the second reservoir <NUM> and returns the hydraulic fluid to the second master cylinder <NUM>.

The suction sides of the first and second pumps <NUM> and <NUM> are provided with suction valves <NUM> and the discharge sides are provided with discharge valves <NUM>.

In addition, the base body <NUM> includes an inlet port 12P to which the fluid line (brake piping) extending from the first master cylinder <NUM> is connected, an inlet port 22P to which the fluid line (brake piping) extending from the second master cylinder <NUM> is connected, an outlet port 14P to which the fluid line (brake piping) extending to the front wheel brake caliper <NUM> is connected, and an outlet port 24P to which the fluid line (brake piping) extending to the rear wheel brake caliper <NUM> is connected.

The brake fluid line A1 is the fluid line from the inlet port 12P to the first inlet control valve <NUM> and the brake fluid line B1 is the fluid line from the first inlet control valve <NUM> to the outlet port 14P.

The brake fluid line C1 is the fluid line from the brake fluid line B1 to the first reservoir <NUM> and the brake fluid line D1 is the fluid line from the first reservoir <NUM> to the first pump <NUM>.

The brake fluid line E1 is the fluid line from the first pump <NUM> to the brake fluid line A1.

The brake fluid lines A2, B2, C2, D2, and E2 are not described to eliminate duplicate descriptions.

Next, the operation of the vehicle brake fluid pressure control device <NUM> will be described. It should be noted here that since the operation of the first circuit from the brake lever <NUM> to the front wheel brake caliper <NUM> is the same as the operation of the second circuit from the brake pedal <NUM> to the rear wheel brake caliper <NUM>, only the first circuit will be described.

As illustrated in <FIG>, the solenoid valve <NUM> as the first inlet control valve and the solenoid valve <NUM> as the first outlet control valve are attached to the base body <NUM>. In addition, the base body <NUM> has the first reservoir <NUM> therein, the brake fluid line A1 and C1 and the like, and the first pump <NUM> between the brake fluid line A1 and the brake fluid line C1.

Approximately the halves of the solenoid valve <NUM> and the solenoid valve <NUM> in the axial direction project from the base body <NUM> and these projecting parts are accommodated in a resinous component <NUM>. The resinous component <NUM> is read as the housing <NUM> below. The solenoid valve <NUM> and the solenoid valve <NUM> have electromagnetic coils <NUM> for driving.

The housing <NUM> has openings on the front side (side of a cover <NUM>) and the back side (side of the base body <NUM>) and has a peripheral wall part <NUM> in which a control board <NUM> is accommodated.

The control board <NUM> is disposed in the housing <NUM> and the control board <NUM> is electrically connected to the electromagnetic coils <NUM> via terminals <NUM>.

An enlarged view of a section 3c in <FIG> is illustrated in <FIG>.

As illustrated in <FIG>, the cover <NUM> to be provided for the housing <NUM> has an insertion protrusion 38a projecting in one direction (toward the housing <NUM>) in the outer periphery of the cover <NUM>, a collecting groove 38b in which resin is collected in this insertion protrusion 38a, and projections 38c extending upward and downward. In addition, an attachment part 36a to which the cover <NUM> is attached is formed in the peripheral wall part <NUM> that surrounds a board accommodation part <NUM>, and the attachment part 36a is provided with a top groove 36c that is filled with an adhesive 36b and into which the insertion protrusion 38a is inserted.

The cover <NUM> has, on the outer side of the insertion protrusion 38a, a contacting part <NUM> that comes in contact with the attachment part 36a of the housing <NUM>.

The insertion protrusion 38a is provided with the projections 38c so that the projections 38c make slidable contact with the inner surface of the top groove 36c when the cover <NUM> is attached. When the cover <NUM> tries to move in the horizontal direction, the cover <NUM> cannot move in the horizontal direction since the projections 38c come in contact with the inner surface of the top groove 36c. As a result, it is possible to prevent a rattle when the cover <NUM> is attached to the housing <NUM>.

A tapered surface 38f is provided at the lower end part of the insertion protrusion 38a to form the lower end of the insertion protrusion 38a in a pointed shape. This shape enables the insertion protrusion 38a to be smoothly accommodated in the groove 36c and to smoothly thrust the adhesive 36b.

When the adhesive 36b is placed in the top groove 36c and the cover <NUM> is lowered, the insertion protrusion 38a is inserted into the top groove 36c. As illustrated in <FIG>, the adhesive 36b is pushed by the insertion protrusion 38a and partially moves to the outside of the peripheral wall part <NUM> or the inside of the peripheral wall part <NUM>.

As illustrated in <FIG>, since the adhesive 36b flows into the collecting groove 38b, the adhesive 36b does not protrude onto the outer surface of the housing <NUM>.

It is desirable to increase the cross sectional areas of the collecting groove 38b and a second collecting groove 36d by providing the second collecting groove 36d in the housing <NUM>.

Next, modifications will be described with reference to <FIG> and <FIG>.

As illustrated in <FIG>, the collecting groove 38b may be formed in the top groove 36c in the attachment part 36a of the housing <NUM>. Since the structure other than this is the same as in <FIG>, reference numerals in <FIG> are used and detailed descriptions are omitted.

As illustrated in <FIG>, the collecting groove 38b may be formed in the cover <NUM>. Since the structure other than this is the same as in <FIG>, reference numerals in <FIG> are used and detailed descriptions are omitted.

As described above, the collecting groove 38b may be provided in the housing <NUM>, provided in the cover <NUM>, or provided across the housing <NUM> and the cover <NUM>.

That is, the collecting groove 38b may be provided in the top groove 36c of the attachment part 36a of the housing <NUM> or provided between the insertion protrusion 38a of the cover <NUM> and the contacting part <NUM>.

The collecting groove 38b is provided in at least one of a portion between the insertion protrusion 38a of the cover <NUM> and the contacting part <NUM> and the top groove 36c of the attachment part 36a.

As illustrated in <FIG>, a projecting part 36e is formed so as to project from the housing <NUM> toward the cover <NUM>. This projecting part 36e is provided on the attachment part 36a in which the top groove 36c for accommodating the insertion protrusion 38a of the cover <NUM> is formed. This projecting part 36e fixes (properly speaking, temporarily fix the cover for bonding) the cover <NUM>. The projecting part 36e is referred to below as the fixing part 36e.

This fixing part 36e is a gate-shaped member extending from the attachment part 36a toward the cover <NUM>. A projection 38e provided in the cover <NUM> is locked to a rectangular hole 36f of the fixing part 36e to fix (temporarily fix) the cover <NUM>.

The cover <NUM> has the plurality of projections 38c arranged at a predetermined pitch and these projections 38c come in contact with the outer-side wall surface of the top groove 36c, so the cover <NUM> is attached to the housing <NUM> without being horizontally moved or rotated.

It should be noted here that the projections 38c are provided on the outer surface of the cover <NUM> in the embodiment, but the projections 38c may be provided on the inner surface of the cover <NUM>. In this case, the projections 38c come in contact with the inner-side wall surface of the top groove 36c.

An enlarged view of a section 7b in <FIG> is illustrated in <FIG> and an exploded view of <FIG> is illustrated in <FIG>.

As illustrated in <FIG>, the peripheral wall part <NUM> of the housing <NUM> has a flange <NUM> that comes in contact with the base body <NUM>, and the flange <NUM> overhangs toward the outer side from the peripheral wall part <NUM> and has a lower groove 92b for collecting an adhesive 92a in a surface close to the base body <NUM>. In addition, a bottom surface 92c of the lower groove 92b is a coarse surface 92d.

The housing <NUM> is brought in contact with the base body <NUM> so that the adhesive 92a is accommodated in the lower groove 92b.

This bonds the adhesive 92a to the coarse surface 92d due to an anchor effect as illustrated in <FIG> and firmly bonds the housing <NUM> to the base body <NUM>, thereby preventing interface peeling.

In addition, the surface of the flange <NUM> close to the base body <NUM> is divided by the lower groove 92b into an outer-side surface 92e and an inner-side surface 92f in <FIG> and a small gap <NUM> is provided between the inner-side surface 92f and the base body <NUM>.

Since the excess portion of the adhesive 92a flows into the small gap <NUM>, there is no concern that the adhesive 92a enters the inside of the housing <NUM>.

Although not illustrated, the invention is also applicable to a single-circuit vehicle brake fluid pressure control device.

It should be noted here that the invention is preferable to a motorcycle, but the invention is also applicable to a three-wheeled cycle and application to a general vehicle has no difficulty.

Claim 1:
A vehicle brake fluid pressure control device (<NUM>),
comprising:
- a base body (<NUM>) provided with a brake fluid line (A1 - E2);
- a housing (<NUM>) in which a control board (<NUM>) is accommodated; and
- a cover (<NUM>) that is attached to the housing (<NUM>) and covers the control board (<NUM>),
characterized in that:
- the housing (<NUM>) has an opening on a front side and an opening on a back side and has a peripheral wall part (<NUM>) in which the control board (<NUM>) is accommodated,
- the peripheral wall part (<NUM>) of the housing (<NUM>) has an attachment part (36a) to which the cover (<NUM>) is attached,
- the cover (<NUM>) has a protrusion (38a) extending toward the attachment part (36a),
- the attachment part (36a) of the peripheral wall part (<NUM>) has a top groove (36c) that is filled with an adhesive (36b) and into which the protrusion (38a) is inserted,
- the cover (<NUM>) comes in contact with the attachment part (36a) at a contacting part (<NUM>) present on an outer side of the protrusion (38a) when the cover (<NUM>) is attached to the housing (<NUM>),
- at least one of the top groove (36c) of the attachment part (36a) and a portion between the contacting part (<NUM>) and the protrusion (38a) of the cover (<NUM>) has a collecting groove (38b) in which an excess portion of the adhesive (36b) is collected when the cover (<NUM>) is attached to the housing (<NUM>), and
- the protrusion (38a) further includes projections (38c) that come in contact with a surface of the top groove (36c) into which the protrusion (38a) is inserted.