JP5126006B2 - Brake hydraulic pressure control device - Google Patents

Description

  The present invention relates to a brake fluid pressure control device for a vehicle in which a mounting structure for a vehicle body is devised to improve mounting performance.

  A brake hydraulic pressure control device for a vehicle having an ABS (anti-lock or ESC (side slip prevention)) function is mounted on a vehicle body using a plurality of components. For example, in the brake hydraulic pressure control device disclosed in Patent Document 1 below, a hydraulic unit housing is coupled to a bracket fixed to a vehicle body using a rubber mount, a mount shaft, a mount cover, a contact plate, and the like. There are a plurality of connecting portions separated from each other in one apparatus.

  The following Patent Document 2 also discloses a bracket that supports the hydraulic pressure control device in combination. The bracket of Patent Document 2 supports two locations of a housing called a valve body and a boss at the end of a motor attached to the housing with the bracket. The structure of supporting the hydraulic pressure control device at a plurality of positions apart from each other is the same as the device of Patent Document 1, although it is different from the technology described above.

JP-A-8-258688 JP-T 9-503463

  As disclosed in Patent Documents 1 and 2 and the like, the conventional brake fluid pressure control device is connected to a bracket on the vehicle body at a plurality of locations separated from each other. Since the work is performed in the engine room of a vehicle with a limited space, it is difficult to ensure the reliability of the work with respect to torque management for bolt tightening. In addition, the number of parts such as mounts and mounting shafts is large, and it was not advantageous in terms of reduction of work man-hours, cost reduction, and simplification of parts management.

  Also, in the brake hydraulic unit, the motor, which accounts for a large percentage of the weight, hangs from the side of the hydraulic unit that is connected and supported by the bracket, resulting in a poor weight balance. The mounting orientation of the device sometimes changed over time.

  In addition, these brackets are a plurality of parts manufactured by bending a metal flat plate into an L shape, and support the hydraulic unit at positions separated from each other. For this reason, deformation due to bending stress applied to individual components and overall torsional deformation due to deformation of all these components are likely to occur. As a countermeasure, it is necessary to use a steel-based material with a large plate thickness from the viewpoint of ensuring strength, and the number of parts themselves increases, leaving room for improvement in terms of reduction in processing man-hours and weight reduction. .

  This invention makes it a subject to improve the attachment property to the vehicle of the brake fluid pressure control apparatus for vehicles using the completely different attachment structure from the past.

In order to solve the above problems, in this invention, a brake hydraulic pressure control device for a vehicle having a hydraulic pressure unit in which a motor for driving the pump is mounted on a motor mounting surface of a housing incorporating a pump and a solenoid valve. Include brackets to fix to the car body.
The bracket is provided with a cylindrical portion with an upward opening, and the hydraulic unit is supported from below by the cylindrical portion,
The yoke of the motor is inserted into the cylindrical portion of the bracket from the upper side to the lower side, and the surface is directed between the outer periphery of the yoke and the inner periphery of the cylindrical portion and downward of the hydraulic unit. The hydraulic unit is held by the bracket with a spacer interposed between the cylinder portion and the surface facing the upper side of the cylinder portion.
Here, the term “up / down” refers to the vertical direction of the vehicle body to which the bracket is fixed.

  The bracket may be provided with a flange at the upper end of the cylindrical portion, and the bracket has the spacer interposed between the upward surface of the flange and the motor mounting surface of the housing facing the upward surface. Thus, the hydraulic unit can be held by the bracket.

  Moreover, the said bracket can use what was formed with the resin molded product or the metal. The bracket is preferably provided with position holding means for locking the spacer on the inner surface of the cylindrical portion and holding the spacer in a fixed position, and a stopper for locking the spacer or bracket is provided on the outer periphery of the yoke of the motor. It is also preferable to provide it.

  The spacer may be an O-ring when the motor yoke and the bracket cylinder are circular in cross section.

  The brake hydraulic pressure control device according to the present invention uses a bracket having a cylindrical portion with an upward opening to direct the yoke of the motor attached to the housing of the hydraulic pressure unit inside the cylindrical portion of the bracket from above to below. Insert. Therefore, when installing the device, place a spacer on either the inner surface of the cylinder or the outer peripheral surface of the motor yoke and the flange on the upper end of the cylinder, and drop the yoke of the hydraulic unit motor into the cylinder. It is only necessary to insert them, and it becomes unnecessary to mount a plurality of parts with bolts at a plurality of locations separated from each other, thereby simplifying the operation and reducing labor. As a result, work reliability can be ensured, and accompanying effects such as productivity improvement and cost reduction can be obtained.

  Also, unlike the conventional support structure that supports the hydraulic unit with a plurality of separate sheet metal bent parts, a bracket with an integral cylindrical part of a continuous shape is used to support a motor that accounts for a large proportion of the weight of the hydraulic unit. The torsional deformation of the bracket hardly occurs. In addition, since the entire circumference of the motor is supported in a well-balanced manner from below by the cylindrical portion of the bracket, bending stress applied to the bracket is also reduced. Therefore, the device mounting posture does not change with time. In addition, the stress applied to the bracket is mainly compressive stress, and the cylindrical part shape that supports it is strong against compressive stress. By using a plastic bracket that can be molded, it is possible to facilitate the manufacture of the bracket and reduce the weight that is effective for improving the fuel efficiency of the vehicle. The bracket may be formed of metal, and in this case as well, it is a cylindrical shape and is mainly supported by compressive stress. Therefore, it is a cylindrical part with the same strength thinner than a bracket manufactured by bending a conventional sheet metal. It can be obtained, and the weight can be reduced.

  In addition, since the yoke of the motor is covered with the cylindrical portion of the bracket and isolated from the outside, an effect of preventing corrosion of the motor yoke can be expected.

  The operations and effects of the other configurations described as preferable in the above will be described in the next section.

  Embodiments of the present invention will be described below with reference to FIGS. 1 and 2 of the accompanying drawings. 1 in FIG. 1 is a brake fluid pressure control device mounted on a vehicle. The brake fluid pressure control device 1 is configured by combining a fluid pressure unit 2 and an electronic control unit 4.

  The hydraulic unit 2 has a motor mounting surface 3a of a housing 3 having a built-in pump (not shown) attached to a motor 6 for driving the built-in pump. Further, the hydraulic unit 2 is opposite to the motor mounting surface 3a of the housing 3. A solenoid valve (hydraulic pressure control device) 8 for controlling the hydraulic pressure is assembled on the end face, and a pressure sensor, a pulsation absorbing damper, a brake discharged when the wheel cylinder is depressurized in the housing 3 as necessary. It is widely known to further provide a low-pressure liquid reservoir (not shown) for temporarily taking in the liquid. The illustrated hydraulic unit 2 is a known unit. The solenoid valve 8 referred to here is connected to a pressure-increasing solenoid valve or a pressure-reducing solenoid valve that adjusts the fluid pressure supplied to the wheel cylinder of each wheel, or a fluid pressure path or reservoir between the master cylinder and the wheel cylinder. A solenoid valve that opens and closes the hydraulic pressure path as necessary.

  The electronic control unit 4 determines the necessity of hydraulic pressure control from the vehicle behavior information, the driver's brake operation status, and the like, and outputs a control command to the motor 6 and the electromagnetic valve 8 of the hydraulic unit 2. The circuit board on which the “ECU” is mounted is housed in the case 5, which is also a well-known unit. The electronic control unit 4 is mounted on the end surface of the housing 3 opposite to the motor mounting surface 3a, and the unit 5 is assembled in a semi-exposed state on the end surface opposite to the motor mounting surface 3a. The electromagnetic valve 8 is covered.

  Reference numeral 10 in FIG. 1 denotes a bracket characterizing the present invention. The bracket 10 has a cylindrical portion 11 (which is cylindrical in the figure) having an upward opening and a mounting portion 12 to the vehicle body. The cylinder part 11 is a cylinder whose inner diameter is slightly larger than the outer diameter of the yoke 7 of the motor 6 included in the hydraulic unit 2, and a flange 13 is formed at the upper end of the cylinder part 11.

  The bracket 10 is preferably a resin molded product. The bracket made of resin can be integrally formed with the cylindrical portion 11 and the mounting portion 12 by a mold, is easy to manufacture, is inexpensive, and can be reduced in weight. A lightweight metal plate such as aluminum may be formed into a shape having the cylindrical portion 11 and the attachment portion 12 by deep drawing. Since the bracket 10 supports the hydraulic unit 2 from directly below, the stress applied from the hydraulic unit 2 is mainly compressive stress in the vertical direction. The cylindrical shape of the cylindrical portion 11 is strong against compressive stress and bending stress. For this reason, it is possible to adopt resin or light metal as a material or to reduce the thickness of the bracket, and to reduce the weight of the bracket. It becomes like this.

  The bracket mounting portion 12 shown in the figure is provided with a plurality of legs, and all of the legs are fixed to the vehicle body with bolts. If the structure is such that some of the legs are inserted into sockets provided on the vehicle body side. The number of fixing parts by bolts can be reduced. For example, if a total of four legs are provided at positions that are indexed at a 90 ° pitch, and if three legs are inserted into the socket by moving in the same direction, the number of bolts for the legs will be one. The workability of installation is improved.

As shown in FIG. 3, the bracket 10 supports the hydraulic unit 2 by providing a step portion 7a on the outer peripheral surface of the yoke 7, and providing a cylindrical portion 11 of the bracket 10 with a convex portion 11a corresponding to the step portion 7a. It is also possible to provide a configuration in which the downward surface of the stepped portion 7a on the outer periphery of the yoke 7 is supported from below by the upward surface of the convex portion 11a of the bracket 10 (this structure has the flange 13 at the upper end of the bracket 10 shown in FIG. Unnecessary). Further, as shown in FIG. 4, flange 7 b and flange 13 are provided in correspondence with the upper end of yoke 7 and the upper end of cylindrical portion 11 of bracket 10, respectively, and the upper surface of flange 13 on bracket 10 side faces yoke 7 side. It can also be carried out in the form of supporting the downward surface of the flange 7b.
However, as shown in FIG. 1, it is preferable to support the motor mounting surface 3a of the housing 3 of the hydraulic unit 2 with the upward surface of the flange 13 at the upper end of the cylindrical portion of the bracket 10 as shown in FIG. . In the form of FIG. 1, it is easy to separate the portion that supports the hydraulic unit 2 from the center of the motor (yoke), and it is easy to ensure support stability. Here, the thickness of the cylindrical portion 11 of the bracket 10 may be increased to eliminate the flange 13, and the hydraulic unit 2 may be supported from below by the upward surface of the upper end of the cylindrical portion. However, in the form of FIG. Therefore, the flange 13 is provided by reducing the thickness of the cylindrical portion 11 of the bracket 10.

  In the present invention, the bracket 10 configured as described above is fixed to the vehicle body A, and the motor yoke 7 is inserted into the cylindrical portion 11 of the bracket 10 so as to drop downward from above. Further, the hydraulic unit 2 is provided with spacers 14 between the outer periphery of the yoke 7 and the inner surface of the cylindrical portion 11 and between the flange 13 and the motor mounting surface 3a of the housing 3 facing the upper surface of the flange. Is held by the bracket 10.

  The spacer 14 may be an inexpensive O-ring if the motor yoke 7 and the cylindrical portion 11 are circular in cross section. The spacer 14 may be formed of an elastic body and can provide a buffer effect, but is not limited to an elastic body as long as it has a function of preventing the hydraulic unit 2 from rattling.

  The bracket 10 is preferably provided with a position holding means 15 for holding the spacer 14 at a fixed position on the inner surface of the cylindrical portion 11. The illustrated position holding means 15 is configured by an annular groove to drop a part of the spacer 14, but an annular protrusion or the like may be used. When the position holding means 15 is provided, the spacer 14 is held at a fixed position, and the holding stability does not deteriorate.

  A stopper 16 is provided on the outer periphery of the yoke 7 of the motor 6 to prevent the yoke 7 from coming off from the bracket 10. The illustrated stopper 16 is engaged with the spacer 14, but may be provided with a convex portion on the inner surface of the cylindrical portion 11 of the bracket 10 and locked to the convex portion by bayonet fitting or the like.

  The stopper 16 for retaining is only preferable. The housing 3 of the hydraulic unit 2 is provided with a connection port 17 (see FIG. 1) for connection with a wheel cylinder, a master cylinder, etc., and a piping hose (not shown) is connected to the connection port 17; By holding the motor that occupies a large proportion of the weight of the hydraulic unit, it is possible to reduce the width of the swing of the hydraulic unit, so that the motor yoke 7 is held in the cylindrical portion 11 without being prevented from coming off. First of all, it is unlikely that the cylinder part 11 will naturally come off due to the vibration of the engine or the vibration accompanying the running of the car. Therefore, the stopper 16 is not an essential element.

Partially broken side view showing an outline of the brake fluid pressure control device of the present invention 1 is a perspective view of a bracket included in the brake fluid pressure control device of FIG. The partially broken side view which shows the outline | summary of the other form of the brake fluid pressure control apparatus of this invention The partially broken side view which shows the outline | summary of the further another form of the brake fluid pressure control apparatus of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Brake hydraulic pressure control apparatus 2 Hydraulic pressure unit 3 Housing 3a Motor attachment surface 4 Electronic control unit 5 Case 6 Motor 7a Step part 7b Flange 7 Yoke 8 Solenoid valve 10 Bracket 11 Tube part 11a Convex part 12 Attachment part 13 Flange 14 Spacer 15 Position holding means 16 Stopper 17 Connection port A

Claims (7)

Brake hydraulic pressure control device for vehicles having a hydraulic unit (2) in which a motor (6) for driving the pump is mounted on a motor mounting surface (3a) of a housing (3) incorporating a pump and a solenoid valve (8) Because
A bracket (10) for fixing to the vehicle body is provided, and a cylindrical portion (11) having an upward opening is provided on the bracket (10), and the hydraulic unit (2) is supported from below by the cylindrical portion (11). ,
The yoke (7) of the motor (6) is inserted into the bracket (10) of the bracket (10) from the upper side to the lower side, and the outer periphery of the yoke (7) and the cylindrical portion (11) are inserted. A spacer (14) is interposed between the inner circumference and the surface facing the lower side of the hydraulic unit (2) and the surface facing the upper side of the cylindrical portion (11) facing the inner periphery. The brake hydraulic pressure control device is characterized in that the hydraulic pressure unit (2) is held by the bracket (10).   The bracket (10) includes a flange (13) at the upper end of the cylindrical portion (11), and an upward surface of the flange (13) and a motor mounting surface of the housing (3) facing the upward surface. The brake hydraulic pressure control device according to claim 1, wherein the hydraulic pressure unit (2) is held by the bracket (10) with the spacer (14) interposed therebetween.   The brake fluid pressure control device according to claim 1 or 2, wherein the bracket (10) is a resin molded product.   The brake fluid pressure control device according to claim 1 or 2, wherein the bracket (10) is made of metal.   The position holding means (15) for holding the spacer (14) in a fixed position is provided on the inner surface of the cylindrical portion (11) of the bracket (10). The brake fluid pressure control device described.   A stopper (16) that prevents the spacer (14) or the yoke (7) to be locked to the bracket (10) from being removed from the bracket (10) on the outer periphery of the motor yoke (7); The brake fluid pressure control device according to any one of claims 1 to 5.   The brake fluid pressure control device according to any one of claims 1 to 6, wherein an outer periphery of the yoke (7) and the cylindrical portion (11) are circular in cross section and an O-ring is used as the spacer (14).

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