JP5155962B2 - Base body of vehicle brake fluid pressure control device - Google Patents

Description

  The present invention relates to a base body of a brake fluid pressure control device for a vehicle.

  A hydraulic pressure control unit used in a vehicle brake hydraulic pressure control device includes a base body on which a brake fluid path is formed, and a motor for operating a pump that sucks brake fluid from a reservoir formed inside the base body. And a control device for controlling the operation of a solenoid valve and a motor attached to the base.

  A connection hole is formed on one surface of the base body to which a brake pipe leading to the master cylinder and the wheel cylinder is connected. As a connection structure for connecting the brake pipe to this connection hole, the banjo bolt is inserted into the annular banjo provided at the tip of the brake pipe, and the banjo bolt is screwed into the connection hole, so that one surface of the base body There is a banjo type in which the banjo is fixed to and the brake pipe is connected to the connection hole through the banjo.

  In the banjo type connection structure described above, it is desirable to provide a rotation stopper for preventing the brake pipe from rotating together when the banjo bolt is screwed into the connection hole. Therefore, as a brake pipe detent structure, a pin-shaped stopper is erected in the vicinity of the connection hole, and the protrusion provided on the outer peripheral surface of the banjo is brought into contact with the stopper to constitute a detent of the brake pipe. (For example, refer to Patent Document 1).

JP-A-8-113179 (paragraph 0005)

  In the conventional anti-rotation structure of the brake pipe, a hole is formed on one surface of the base, and the stopper is erected on one surface of the base by press-fitting the base end of the stopper into the hole. Therefore, it is necessary to form a hole in one surface of the base body only in order to form a brake pipe detent, and there is a problem that the number of processing steps of the base body increases.

  Therefore, in the present invention, there is no need to form a dedicated hole in order to solve the above-described problem and to constitute a brake pipe detent, and the brake fluid pressure control device for a vehicle can reduce the number of processing steps. It is an object to provide a substrate.

  In order to solve the above-mentioned problems, the present invention provides a base body in which a brake fluid passage is formed, and a connection hole to which a brake pipe is connected is formed on one surface and a hole communicating with the brake fluid passage. A portion is formed, and the hole portion is formed with an engagement portion that engages with a part of the brake pipe to form a detent of the brake pipe.

  In this configuration, the brake pipe is prevented from rotating by using a hole provided in advance in the base, and it is necessary to form a hole on one surface of the base only in order to configure the brake pipe. Therefore, the number of processing steps for the substrate can be reduced.

  In the above-described base body, the engagement portion is an engagement pin having a proximal end side inserted into the hole portion, and a part of the brake pipe can be brought into contact with the distal end side of the engagement pin. With this configuration, it is possible to easily configure the detent of the brake pipe.

  In the substrate described above, the hole can be sealed by the engagement pin. In this configuration, parts such as a steel ball for sealing the hole communicating with the brake fluid passage are not necessary, and therefore, the rotation prevention of the brake pipe can be configured without increasing the number of parts of the base.

In the base body, a banjo provided in the brake pipe and a banjo bolt for fixing the banjo to the one surface are provided, and the banjo bolt is screwed into the connection hole, The formed protrusion can be brought into contact with the engagement pin.
In this configuration, since the extension direction of the brake pipe can be adjusted by appropriately setting the angle of the protrusion, the extension direction of the brake pipe can be set according to the layout of the vehicle.

  In the above-described base body, the engagement portion is a part of the hole portion, and is provided with a banjo provided in the brake pipe and a banjo bolt for fixing the banjo to the one surface. A bolt is screwed into the connection hole, and a protrusion formed on the banjo can be inserted into the hole.

In this configuration, since the banjo itself is engaged with the base body, the brake pipe can be prevented from rotating without increasing the number of parts of the base body.
Moreover, since the extension direction of brake piping can be adjusted by setting the angle of the protrusion part of a banjo suitably, the extension direction of brake piping can be set according to the layout of a vehicle.
In addition, when the hole is sealed by the protrusion of the banjo inserted into the hole, parts such as steel balls for sealing the hole are not required, so the number of parts of the base is increased. In addition, it is possible to constitute a detent of the brake pipe.

  In the above-described base body, the hole portion can be sealed by a sealing member disposed on the brake fluid path side with respect to the engagement portion of the hole portion. In this configuration, there is no need to seal the hole by pressing the banjo's protrusion into the hole, so the brake pipe can be easily attached to and detached from the connection hole, improving workability. Can do.

  In the base body of the present invention, the brake pipe is prevented from rotating by using a hole communicating with the brake fluid passage, and the hole is formed on one surface of the base body only in order to form the brake pipe. Since it is not necessary, the number of processing steps for the substrate can be reduced.

It is the side view which showed the hydraulic control unit using the base | substrate of 1st embodiment. (A) is the top view which showed the control unit using the base | substrate of 1st embodiment, (b) is the top view which showed the base | substrate of 1st embodiment. It is the figure which showed the banjo type connection structure connected to the base | substrate of 1st embodiment, (a) is a disassembled perspective view, (b) is a sectional side view. It is the figure which showed the modification of 1st embodiment, (a) is a sectional side view of the structure which sealed the hole with the engagement pin, (b) is a sectional side view of the structure which crimped the base | substrate to the engagement pin. It is. It is the figure which showed the method of caulking a base | substrate to an engagement pin, (a) is a sectional side view when an engagement pin begins to insert in a hole, (b) is a sectional side view in the state where the level | step-difference part began to collapse FIG. 2C is a side sectional view showing a state where the caulking is finished. It is the figure which showed the banjo type connection structure connected to the base | substrate of 2nd embodiment, (a) is a disassembled perspective view, (b) is a sectional side view. It is the top view which showed the state which screwed the banjo bolt in the connection hole in the banjo type connection structure connected to the base | substrate of 2nd embodiment.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the description of each embodiment, the same constituent elements are denoted by the same reference numerals, and redundant descriptions are omitted.
In the following description, each direction of the base is set for convenience in order to easily understand the base, and does not limit the configuration of the base. The upper surface of the base corresponds to “one surface” in the claims.

(First embodiment)
The vehicle brake hydraulic pressure control device U according to the first embodiment shown in FIG. 1 is suitably used for a bar handle type vehicle such as a motorcycle, an automatic tricycle, and an all-terrain vehicle (ATV), and is mounted on a wheel brake. By appropriately controlling the brake fluid pressure applied to the wheel cylinder, the anti-lock brake control of the wheel cylinder is possible.

  The vehicle brake hydraulic pressure control device U has a hydraulic pressure control unit 1. The hydraulic control unit 1 includes a base body 10 in which a brake fluid path A is formed, a motor 20 that is integrally fixed to the front surface 10a of the base body 10, and a control that is integrally fixed to the rear surface 10b of the base body 10. The apparatus 30 is mainly provided.

The motor 20 is an electric component for operating a plunger pump (not shown) that sucks brake fluid from a reservoir (not shown) formed inside the base body 10.
The control device 30 varies the brake fluid pressure in the brake fluid passage A by controlling the operation of a solenoid valve (not shown) attached to the base body 10 and the motor 20 based on the output from the wheel speed sensor. It is something to be made.

The base body 10 is a substantially rectangular parallelepiped metal part, and includes a front surface 10a, a rear surface 10b, left and right side surfaces 10c and 10c (see FIG. 2B), an upper surface 10d and a lower surface 10e. Is formed.
A bearing hole (not shown) into which the output shaft of the motor 20 is inserted opens on the front surface 10a of the base body 10, and an electromagnetic valve mounting hole (not shown) into which the electromagnetic valve is inserted on the rear surface 10b of the base body 10. ) Has multiple openings.

  As shown in FIG. 2 (b), connection holes 11 and 11, which are screw holes having a circular cross section, are formed on the left and right ends of the upper surface 10d of the base body 10, respectively. The connection hole 11 is a part to which the brake pipe 40 (see FIG. 2A) is connected.

On the upper surface 10 d of the base body 10, holes 12 and 12 that communicate with the brake fluid path A of the base body 10 are formed in the vicinity of the front side of the connection holes 11 and 11.
Here, the holes 12 and 12 shown in FIG. 1 are necessarily opened to the upper surface 10d of the base body 10 when the brake fluid path A is formed from the upper surface 10d of the base body 10 to the inside of the base body 10. . Since it is necessary to prevent the brake fluid from leaking from the hole 12, in the first embodiment, a steel ball 13 as a sealing member is press-fitted into the lower end of the hole 12.

Next, a banjo type connection structure for connecting the brake pipe 40 to the connection hole 11 of the base body 10 shown in FIG. 1 will be described.
As shown in FIG. 3A, the brake pipe 40 includes a brake hose H, an annular banjo 41 provided at the tip of the brake hose H, and a banjo bolt 42 for fixing the banjo 41 to the upper surface 10d. And are provided. In the banjo type connection structure, the screw portion 42 a of the banjo bolt 42 inserted through the banjo 41 is screwed into the connection hole 11, and the banjo 41 is fixed to the upper surface 10 d of the base body 10. The brake hose H is connected to the connection hole 11.

  The banjo 41 is a connection fitting having a cylindrical attachment portion 41a, and a connection pipe 41b fitted into the distal end portion of the brake hose H projects from the outer peripheral surface of the attachment portion 41a. As shown in FIG. 3 (b), a liquid passage 41c is formed in the attachment portion 41a from the inner peripheral surface thereof to the inside of the connection pipe 41b, and the attachment portion 41a is connected to the attachment portion 41a through the liquid passage 41c and the connection pipe 41b. The internal space communicates with the brake hose H.

  As shown in FIG. 3A, on the outer peripheral surface of the mounting portion 41a, a circular cross section projecting in the radial direction of the mounting portion 41a at a position opposite to the connecting pipe 41b across the center position of the mounting portion 41a. 41d is provided. The protrusion 41d is a part that comes into contact with an engagement pin 51 described later.

  The banjo bolt 42 is a bolt in which a flange portion 42b is formed on the base end side (upper end side), and a liquid passage 42c is formed in the center portion. As shown in FIG. 3B, the liquid passage 42c opens at two locations on the outer peripheral surface between the flange portion 42b and the screw portion 42a, and also opens at the distal end surface of the screw portion 42a. In addition, each opening part of the base end side of the liquid path 42c is formed in the position accommodated in the inside of the attachment part 41a of the banjo 41, when the banjo 41 is attached to the upper surface 10d of the base | substrate 10 with the banjo bolt 42. Yes.

  When the brake pipe 40 is connected to the connection hole 11 using the banjo type connection structure described above, as shown in FIG. 3A, the metal annular seal members 43, In a state via 44, the screw portion 42 a of the banjo bolt 42 is inserted into the mounting portion 41 a and the screw portion 42 a is screwed into the connection hole 11.

As a result, as shown in FIG. 3B, the attachment portion 41 a of the banjo 41 is sandwiched between the upper surface 10 d of the base body 10 and the flange portion 42 b of the banjo bolt 42, so that It is fixed (see FIG. 1).
In a state where the banjo 41 is fixed to the upper surface 10d of the base body 10, a gap 45 is formed between the inner peripheral surface of the mounting portion 41a of the banjo 41 and the outer peripheral surface of the screw portion 42a of the banjo bolt 42, The gap 45 is watertight by the seal members 43 and 44.

When the connection hole 11 is an inlet port leading to the master cylinder, the brake fluid supplied from the brake hose H flows into the gap 45 through the connection pipe 41b and the liquid passage 41c of the banjo 41, and from the gap 45 to the banjo bolt 42. To the connection hole 11 through the liquid passage 42c.
When the connection hole 11 is an outlet port that communicates with the wheel cylinder of the wheel brake, the brake fluid supplied from the connection hole 11 flows into the gap 45 through the liquid passage 42c of the banjo bolt 42, and from the gap 45 to the banjo 41. It flows out to the brake hose H through the liquid passage 41c and the connecting pipe 41b.

  In the base body 10 of the first embodiment, as shown in FIG. 2A, an engagement portion 50 is provided to prevent the brake pipe 40 from rotating together when the banjo bolt 42 is screwed into the connection hole 11. It has been.

As shown in FIG. 3A, the engaging portion 50 includes a cylindrical engaging pin 51 that is press-fitted into the hole portion 12 that communicates with the brake fluid path A.
As shown in FIG. 3B, the engagement pin 51 is a spring pin whose base end is press-fitted into the hole 12, and the distal end protrudes from the hole 12.

When the banjo bolt 42 is screwed into the connection hole 11, the protrusion 41 d of the banjo 41 abuts against the distal end side of the engagement pin 51 in the rotational direction of the banjo bolt 42 as shown in FIG. ing.
As described above, since the protrusion 41d of the banjo 41 is engaged with the engagement pin 51, the rotation of the brake pipe 40 is prevented even if the banjo 41 and the brake pipe 40 rotate together in the rotation direction of the banjo bolt 42. Can do.

  In the base body 10 according to the first embodiment as described above, as shown in FIG. 1, the rotation of the brake pipe 40 is configured using holes provided in the base body 10 in advance. Since it is not necessary to form a hole in the base body 10 only to configure the rotation stopper, the number of processing steps for the base body 10 can be reduced.

  Moreover, since the extension direction of the brake piping 40 can be adjusted by appropriately setting the angle of the protrusion 41d of the banjo 41, the extension direction of the brake piping 40 can be set according to the layout of the vehicle.

As mentioned above, although 1st embodiment of this invention was described, this invention is not limited to said 1st embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the engaging portion 50 provided in the base body 10 of the first embodiment shown in FIG. 3A, the hole 12 is sealed by press-fitting the steel ball 13 into the lower end portion of the hole 12. However, as shown in FIG. 4A, the hole 12 can be sealed by the engagement pin 52 press-fitted into the hole 12.
In this configuration, parts such as a steel ball for sealing the hole 12 are not necessary, so that the rotation of the brake pipe 40 can be configured without increasing the number of parts of the base body 10.

In addition, as shown in FIG. 4B, when the engagement pin 53 is joined to the hole 12 by caulking the base 10 to the engagement pin 53 press-fitted into the hole 12, the engagement pin 53 The sealing performance and the retaining strength of 51 can be increased.
Here, a method of caulking the base body 10 to the engagement pin 53 will be described. As shown in FIG. 5A, a constricted portion 53c is formed below the base end portion 53a of the engaging pin 53, and a diameter smaller than that of the base end portion 53a is formed below the constricted portion 53c. A small-diameter portion 53b is formed. Further, the hole 12 is formed with an insertion portion 12a on the upper surface 10d side, and a press-fit portion 12b having a reduced diameter on the brake fluid path A side with respect to the insertion portion 12a. Then, the engaging pin 53 is inserted into the hole 12 from the upper surface 10d side. At this time, the base end portion 53 a of the engagement pin 53 is inserted into the insertion portion 12 a of the hole portion 12 with a gap in the radial direction, and the small diameter portion 53 b of the engagement pin 53 is press-fitted into the press-fit portion 12 b of the hole portion 12. Is done. As shown in FIG. 5 (b), the engaging pin 53 is advanced into the hole 12, and the lower end edge of the base end 53a contacts the step 12c between the insertion part 12a and the press-fitting part 12b of the hole 12. When contacted, the stepped portion 12c is crushed and enters the constricted portion 53c. Further, as shown in FIG. 5C, when the engaging pin 53 is advanced into the hole 12 and the stepped portion 12c (base 10) enters the constricted portion 53c of the engaging pin 53, the engaging pin 53 is engaged. The base body 10 is caulked to the pins 53.

  Further, the base body 10 and the vehicle brake hydraulic pressure control device U of the present embodiment are applied to a bar handle type vehicle, but can be applied to various vehicles such as an automobile.

(Second embodiment)
Next, the base body 10A of the second embodiment of the present invention will be described.
The base body 10A of the second embodiment shown in FIG. 6A is the same as the base body 10 of the first embodiment described above (see FIG. 1), except for the configuration of the protrusion 41e and the engaging portion 50A of the banjo 41. It is the composition.

The protrusion 41e of the banjo 41 of the second embodiment has a proximal end on the outer peripheral surface of the attachment portion 41a, and the radial direction of the attachment portion 41a from a position opposite to the connection pipe 41b across the center position of the attachment portion 41a. The front end side is bent toward the upper surface 10d side (lower side) of the base 10.
As shown in FIG. 6B, the engaging portion 50A of the second embodiment is configured by a hole portion 12 communicating with the brake fluid path A.
When the banjo 41 is attached to the upper surface 10 d of the base body 10, the protrusion 41 e of the banjo 41 of the second embodiment is inserted into the hole 12 with a gap in the radial direction, but the banjo bolt 42 is inserted into the connection hole 11. When screwing, as shown in FIG. 7, the tip of the protrusion 41 e of the banjo 41 is in contact with the inner peripheral surface of the hole 12 in the rotational direction of the banjo bolt 42.
In this way, by engaging the protrusion 41 e of the banjo 41 with the hole 12, the banjo 41 and the brake pipe 40 are moved in the rotational direction of the banjo bolt 42 when the banjo bolt 42 is screwed into the connection hole 11. Even when trying to rotate together, the rotation of the brake pipe 40 can be prevented.

  As shown in FIG. 6B, a steel ball 13 for sealing the brake fluid path A is provided at the lower end of the hole 12 in the base 10A. Therefore, since it is not necessary to press-fit the protrusion 41e of the banjo 41 into the hole 12 to seal the hole 12, the brake pipe 40 can be easily attached to and detached from the connection hole 11, and workability is improved. Can be improved.

  In the base body 10A of the second embodiment as described above, since the banjo 41 itself is engaged with the base body, the brake pipe 40 can be prevented from rotating without increasing the number of parts of the base body 10A.

  Moreover, since the extension direction of the brake piping 40 can be adjusted by appropriately setting the angle of the protrusion 41e of the banjo 41, the extension direction of the brake piping 40 can be set according to the layout of the vehicle.

  In addition, when it is not necessary to consider workability when attaching and detaching the brake pipe 40, the protrusion 41e of the banjo 41 inserted into the hole 12 is fixed by press-fitting into the hole 12, etc. The hole 12 can also be sealed. In this configuration, parts such as steel balls for sealing the hole 12 are not necessary, and the number of parts of the base 10 can be reduced.

DESCRIPTION OF SYMBOLS 1 Fluid pressure control unit 10 Base | substrate (1st embodiment)
10A substrate (second embodiment)
11 Connection hole 12 Hole 13 Steel ball (sealing member)
20 Motor 30 Control device 40 Brake piping 41 Banjo 41a Mounting portion 41b Connection tube 41c Banjo liquid passage 41d Protrusion (first embodiment)
41e Protrusion (second embodiment)
42 Banjo bolt 42a Thread portion 42b Flange portion 42c Liquid passage 50 of banjo bolt 50 Engagement portion (first embodiment)
50A engaging portion (second embodiment)
51 engagement pin A brake fluid path H brake hose U vehicle brake fluid pressure control device

Claims (6)

A base body in which a brake fluid passage is formed,
On one side, a connection hole to which a brake pipe is connected is formed, and a hole leading to the brake fluid path is formed,
2. A base body for a brake fluid pressure control device for a vehicle according to claim 1, wherein a part of the brake pipe is engaged with the hole to form an anti-rotation of the brake pipe.   2. The engagement portion is an engagement pin having a proximal end inserted into the hole portion, and a part of the brake pipe is brought into contact with a distal end side of the engagement pin. The vehicle brake fluid pressure control device base described in 1.   The base body of the brake hydraulic pressure control device for a vehicle according to claim 2, wherein the hole is sealed by the engagement pin. A banjo provided in the brake pipe and a banjo bolt for fixing the banjo to the one surface are provided, and the banjo bolt is screwed into the connection hole,
The base of the brake hydraulic pressure control device for a vehicle according to claim 2 or 3, wherein a protrusion formed on the banjo is in contact with the engagement pin. The engaging portion is a part of the hole,
A banjo provided in the brake pipe and a banjo bolt for fixing the banjo to the one surface are provided, and the banjo bolt is screwed into the connection hole,
The base of the vehicle brake hydraulic pressure control device according to claim 1, wherein a protrusion formed on the banjo is inserted into the hole.   The vehicular brake hydraulic pressure control device according to claim 5, wherein the hole is sealed by a sealing member disposed closer to the brake fluid path than the engaging portion of the hole. Substrate.

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