JP2007131233A - Solenoid valve of actuator for controlling brake fluid pressure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accomplish miniaturization in one direction of an actuator A for controlling a brake fluid pressure. <P>SOLUTION: In the solenoid valve (pressure reducing control valve) 30(V) of the actuator A for controlling a fluid pressure, a valve stem 35 integrated with a movable iron core 34 is provided on a valve housing 36 advanceably/retreatably in an axial direction and a valve element 37 is contacted/separated from a valve seat 38 by advancing/retreating of the valve stem 35 to perform opening/closing of the valve. Since a yoke 31 forms a magnetic passage, the shape may be U-shaped and if the yoke 31 is U-shaped, a size (width) of the solenoid valve V can be reduced by a thickness degree of a yoke piece 31a at one side as compared with a cylindrical shape. If the respective solenoid valves V are arranged such that the reduced width direction becomes a vertical direction of the required actuator for controlling the brake fluid pressure, the vertical direction of the actuator for controlling the brake fluid pressure becomes short (miniaturized). A distal end edge 31c of a flange is made to a circular shape along an outer peripheral edge of a winding layer of a coil and a length direction of the flange is made minimum to also reduce the width of the solenoid valve in its direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a solenoid valve used for a brake fluid pressure control actuator of a vehicle and a brake fluid pressure control actuator using the solenoid valve.

  For example, as shown in FIGS. 5 and 6, an actuator A for controlling the brake fluid pressure of a vehicle generally has a motor unit 2 and an electronic control unit (ECU) unit 3 attached to both sides of the hydraulic unit 1. is there.

The hydraulic unit 1 is normally assembled with a reservoir 12, a pump 13, a pressure reduction control valve 20 and a pressure increase control valve 30 in an aluminum alloy housing 10, and a wheel cylinder from the master cylinder port 14 via the pressure increase control valve 30. A passage 16 leading to the port 15 is formed, and a passage 17 leading from the wheel cylinder port 15 to the reservoir 12 via the pressure reducing control valve 20 is formed, and the pump 13 and the pressure increasing control valve 30 are connected from the reservoir 12 to the reservoir 15. A passage 18 reaching the wheel cylinder port 15 is formed (Patent Document 1).
(See FIG. 1).
JP 2005-7955 A

  As the control valves 20 and 30 assembled in the hydraulic unit 1, electromagnetic valves are used. For example, the pressure increase control valve 30 is provided with a cylindrical bobbin 32 in a cylindrical yoke 31, as shown in FIG. A current excitation electromotive coil 33 is wound around the outer peripheral surface of the bobbin 32, and a movable iron core (plunger) 34 with a valve rod 35 is moved in the bobbin 32 through a guide (valve housing) 36 in the axial direction. The valve body 37 at the tip of the valve stem 35 is brought into contact with and separated from the valve seat 38a of the valve seat 38 by moving the movable iron core 34 forward and backward (see FIG. 2 of Patent Document 1). In the figure, 4 is an energizing terminal and 39 is a valve stem return spring.

In this type of brake fluid pressure control actuator A, usually, eight or more fluid pressure control valves V (electromagnetic valves 20, 30) are assembled in a plurality of rows and columns, and the control solenoid valves 20, 30 ( Hereinafter, in order to improve the assemblability of both of them appropriately as “control solenoid valve V” or “solenoid valve V”), as shown in FIG. 8, the yoke 31 of each solenoid valve V is integrated. (See Patent Document 2 and FIG. 3). The yoke 31 has a shape in which U-shaped members are connected to face each other. The U-shaped member is used as a yoke 31 and coils 33 are loaded in the respective yokes 31 (eight). Yes.
JP 09-118215 A

  The conventional solenoid valve V has a circular shape in plan view because the yoke 31 is cylindrical as shown in FIG. 7, and is assembled to the housing 10 as shown in FIG. They are paralleled at the required intervals.

By the way, with today's digitization, miniaturization and cost reduction of vehicles, it is required to reduce the occupied space of the brake fluid pressure control actuator A in the engine room, and in particular, the longitudinal direction of the actuator (H in FIG. 5). There is a strong demand for downsizing.
In order to meet this requirement, in the mounting mode of the electromagnetic valve V shown in FIG. 9, the gap between the electromagnetic valves V in the vertical direction (vertical direction in the figure) is reduced. There is a case that it cannot respond to shortening.

  An object of the present invention is to further reduce the size of the brake fluid pressure control actuator A in the longitudinal direction or the like.

In order to solve the above-mentioned problems, the present invention reduces the width of one direction of the solenoid valve, and the direction in which the width is reduced is the direction in which the brake fluid pressure control actuator is required to be downsized, for example, the vertical direction. It was decided that.
That is, since the yoke forms a path of magnetic lines of force (magnetic path), there is no problem even if it is U-shaped, and if the yoke becomes U-shaped, the width of the U-shaped flange piece is reduced. The size (width) of the solenoid valve can be reduced by the amount that is smaller than the outer diameter of the cylindrical yoke and smaller than the outer diameter of the cylindrical yoke (see W ₁ and W _{2 in} FIG. 2). If the solenoid valves are arranged so that the reduced width direction is the direction in which the required brake fluid pressure control actuator is downsized, the brake fluid pressure control actuator is downsized.
Further, in this configuration, if the front end edge of the flange is formed in an arc shape along the outer peripheral edge of the coil winding layer, the length direction of the yoke flange is minimized, and the width of the electromagnetic valve in that direction is reduced. be able to.

  Specifically, a bobbin is provided in the yoke, a current excitation type coil is wound around the outer peripheral surface of the bobbin, and a movable iron core with a valve rod is provided in the bobbin so as to be movable in the axial direction. In the electromagnetic valve that is individually assembled in a plurality of rows and a plurality of columns in a housing of a brake fluid pressure control actuator that causes the valve body at the tip of the valve stem to contact and separate from the valve seat of the valve seat by the advancement and retraction of the movable iron core, the yoke Is a U-shape consisting of upper and lower flanges and a web piece connecting one end of both flanges, and the width of both flanges is larger than the wound layer outer diameter of the coil, The dimension obtained by adding twice the thickness of the flange, more preferably smaller than the dimension obtained by adding the thickness of the flange to the outer diameter of the wound layer, and the leading edges of both flanges are wound layers of the coil Outer periphery It was an arc shape and the arrangement along.

  The solenoid valve having such a configuration is assembled in a plurality of rows and a plurality of columns within the brake fluid pressure control actuator housing in the same manner as in the past, and the length direction of the flange of the yoke of each solenoid valve in the same row or the same column. Is the same, it is possible to obtain a brake hydraulic pressure control actuator having a shorter length in the direction of the same row or column as compared with the conventional case.

For example, in a brake fluid pressure control actuator in which eight solenoid valves are assembled in a housing, the solenoid valves are arranged in two rows of four, and the two solenoid valves on both sides of the two rows are respectively arranged at the tip of the yoke. The configuration can be configured such that the edge is directed outward, or the two solenoid valves on both sides of the two rows can be configured such that the tip edge of the yoke is directed inward.
By aligning the direction of the electromagnetic valve in this way, the assembling property of the electromagnetic valve can be improved.
At this time, the length direction of the flange of the yoke of the solenoid valve can be matched with the lateral direction of the actuator.
When more than eight solenoid valves (hydraulic pressure control valves) are mounted, at least eight of the solenoid valves are configured as such.

  According to the present invention, as described above, the width direction of the electromagnetic valve can be shortened compared to the conventional one, so that the mounting space of the electromagnetic valve can be reduced. For this reason, it is possible to reduce the size of the brake fluid pressure control actuator incorporating this solenoid valve.

  FIG. 1 to FIG. 3 show an embodiment. The electromagnetic valve 30 of this embodiment is a pressure increase control valve, and a bobbin 32 is provided in a yoke 31 as in the prior art, and an electric current is provided on the outer peripheral surface of the bobbin 32. An exciting electromotive coil 33 is wound, and a movable iron core 34 with a valve rod 35 is provided in the bobbin 32 so as to be movable in the axial direction, and a valve element 37 at the tip of the valve rod 35 is moved by the movement of the movable iron core 34. The valve seat 38 is opened and closed by being brought into and out of contact with the valve seat 38a. In the figure, the same reference numerals as above indicate the same components, 41 is a check valve, 42 is a filter, 43 is a ring for fixing the filter 42, and this ring 43 is press-fitted and fixed to the valve housing 36.

The electromagnetic valve 30 can be separated from the yoke 31 and the coil 33 by the joint surface of the valve housing 36. For example, in FIG. 3, the valve housing 36 is fixed to the housing 10 side of the hydraulic unit. The outer yoke 31, bobbin 32 and coil 33 can be detached upward from the valve housing 36 (see FIG. 8). That is, the yoke 31, a coil assembly _{C 1} consisting of a coil 33, etc., the valve housing 36, the valve body _{C 2} consisting of movable iron core 34 and the like dated valve stem 35 is freely detach.

Yoke 31, unlike the prior art, consists upper and lower flanges 31a and its two flanges 31a U-shaped member comprising a web section 31b for connecting one end of the width W ₁ of the flanges 31a, the coil 33 It is larger than the wound layer outer diameter L and smaller than the dimension (L + t) obtained by adding the thickness t (see FIG. 1) of the flanges 31a and 31a to the wound layer outer diameter L (W ₁ <L + t see FIG. 2). ).
Thus, by setting the width W ₁ of the flanges 31a, the longitudinal width of the electromagnetic valve 30 is determined by the width W ₁ of the flange 31a, the width the width W ₁ is in the longitudinal direction of the electromagnetic valve 30 It becomes.

Further, the leading edge 31 c of the lower flange 31 a has an arc shape along the outer peripheral edge of the winding layer of the coil 33. Similarly, the tip edge 31c of the upper flange 31a may have an arc shape along the outer peripheral edge of the winding layer of the coil 33. On the other hand, the tip edge 31c of the lower flange 31a also advances and retreats the movable iron core 34 in the same manner as the upper flange 31a. Can be shortened as long as there is no hindrance and there is no hindrance to the formation of the magnetic path. For this reason, the “arc shape along the outer peripheral edge of the winding layer of the coil 33” means that the coil 33 is wound as long as there is no hindrance to the formation of the magnetic path as in the tip edge 31c of the upper flange 31a shown in FIG. This includes the case of retreating inward from the outer periphery of the layer.
Thus the length of the flange 31a by shortening the W ₂ (lateral direction in FIG. 2), the width W ₂ of the solenoid valve 30 is shortened.

  The lead terminal 4 led out from the coil 33 is led out from the terminal support piece 32a of the bobbin 32 on the tip end side of the flange 31a and rises upward, then bends toward the web piece 31b side and rises further.

  Similarly to the configuration of the pressure increase control valve 30, the pressure reduction control valve 20 incorporated in the brake fluid pressure control actuator A has a U-shaped member, and the width W of both flanges is set to the coil winding. The outer diameter of the lower layer is larger than the outer diameter of the winding layer and smaller than the dimension obtained by adding the thickness of the flange to the outer diameter of the winding layer, and the tip edge of the lower flange is formed in an arc shape along the outer peripheral edge of the winding layer of the coil.

The pressure increasing control valve 30 and the pressure reducing control valve 20 (solenoid valve V) of this configuration are attached to the housing 10 in the direction of the width of the yoke 31 in the direction in which the arrangement direction is to be shortened in the arrangement of a plurality of rows and columns. Arrange W ₁ to match.
For example, when eight electromagnetic valves (control valves) V are arranged, they are arranged as shown in FIGS. 4 (a) and 4 (b). When 10 are arranged, they are arranged as shown in FIGS. In this case, the length direction of the flange 31 a of the yoke 31 of each electromagnetic valve V coincides with the lateral direction L of the actuator A.

At the position where the electromagnetic valve V is disposed, the direction of the electromagnetic valve V (the direction in the length direction of the flange 31a) is appropriately determined according to the configuration of the housing 10, for example, FIG. 4 (a), FIG. d) As shown in (g), the two solenoid valves V on both sides of the two rows of the four solenoid valves V arranged in two rows are arranged so that the tip edges of the yokes 31 face outward. 4 (b), (e), (f), and (h), two solenoid valves V on both sides of the two rows of four solenoid valves V arranged in two rows. The tip edge of the yoke 31 is directed inward.
Further, the direction of the electromagnetic valve V may be changed in accordance with the shape of the mounting surface (surface in each drawing) of the housing 10. For example, if the mounting part is rounded, the rounded part of the solenoid valve V is aligned with that part (see FIGS. 4 (c) and (e)), and if the mounting part is cornered, The corners of the solenoid valve V are matched (see FIGS. 4D and 4F).

  In the arrangement of these solenoid valves V, since the width direction of the flange 31a of the solenoid valve V is aligned with the longitudinal direction of the housing 10 (brake fluid pressure control actuator A), the coil 33 of the solenoid valve V is wound. If the outer diameters of the layers are the same, the longitudinal direction is shorter than in the prior art.

Further, in the arrangement of each solenoid valve V, a hole 6 is formed in the ECU unit housing 5 corresponding to the lead-out portion of the lead terminal 4 of each solenoid valve V, and the control circuit of the solenoid valve V is formed from the inner wall of the hole 6. A connected bus bar 7 is derived (see FIG. 1).
As shown in FIG. 1, the connection between each bus bar 7 and the lead terminal 4 from the coil 33 of each solenoid valve V is such that the take-out point a of the bus bar 7 from the ECU unit housing 5 is the center of gravity of the coil assembly C ₁ . The lead terminals 4 and 4 from the coil 33 are raised in the axial direction of the coil 33 after being placed on the same side as g or on the outer side (left side in FIG. It is bent toward the top and is further raised and connected and fixed to the bus bar 7.
At this time, the pair of bus bars 7 and 7 are bent in a direction approaching each other, and then reach the connection point b with the pair of lead terminals 4 and 4.

By connecting the bus bars 7 and the lead terminals 4 from the coils 33 of the solenoid valves V, the stress caused by the swing of the coil assembly C ₁ to the connection point b can be suppressed as much as possible.

Incidentally, in the liquid pressure control actuator A, if the size of the lateral L (see FIG. 5) is required, in the transverse direction L, so that the width W ₁ direction of the flange 31a is located, the solenoid valve Place V.

The principal part perspective view of one Embodiment Plan view of the solenoid valve of the same embodiment Main part cutting front view of the same embodiment One arrangement explanatory view of the solenoid valve of the embodiment Other arrangement explanatory view of the solenoid valve of the same embodiment Other arrangement explanatory view of the solenoid valve of the same embodiment Other arrangement explanatory view of the solenoid valve of the same embodiment Other arrangement explanatory view of the solenoid valve of the same embodiment Other arrangement explanatory view of the solenoid valve of the same embodiment Other arrangement explanatory view of the solenoid valve of the same embodiment Other arrangement explanatory view of the solenoid valve of the same embodiment Schematic perspective view of brake fluid pressure control actuator Front view Cutting front view of the main part of the pressure increase control valve of the brake fluid pressure control actuator Main part exploded perspective view of conventional example Arrangement explanatory diagram of conventional solenoid valve

Explanation of symbols

1 Hydraulic unit 2 Motor unit 3 ECU unit 4 Electromagnetic valve coil lead terminal (energization terminal)
5 ECU unit housing 7 Bus bar in ECU unit housing 10 Hydraulic unit housing 20 Pressure reducing control valve 30 Pressure increasing control valve 34 Movable iron core (plunger)
35 Valve rod 37 Valve body 38 Valve seat 38a Valve seat A Brake hydraulic pressure control actuator V Solenoid valve (pressure increase control valve, pressure reduction control valve)

Claims (5)

A bobbin (32) is provided in the yoke (31), a current excitation type coil (33) is wound around the outer peripheral surface of the bobbin (32), and a valve rod (35) is attached to the bobbin (32). A movable iron core (34) is provided so as to be movable in the axial direction, and the valve element (37) at the tip of the valve rod (35) is moved to the valve seat (38a) of the valve seat (38) by moving the movable iron core (34) forward and backward. A solenoid valve (30, 20, V) individually incorporated in a plurality of rows and a plurality of columns in the housing (10) of the brake fluid pressure control actuator (A) to be brought into and out of contact with
The yoke (31) is formed into a U-shape consisting of upper and lower flanges (31a, 31a) and a web piece (31b) connecting one end of both flanges (31a, 31a), and the flange (31a, 31a). The width (W ₁ ) of the coil (33) is larger than the winding layer outer diameter (L) of the coil (33), and the thickness (t) of the flange (31a, 31a) is added to the winding layer outer diameter (L). Brake hydraulic pressure characterized by being smaller than dimension (L + t) and having a tip edge (31c) of the flange (31a, 31a) having an arc shape along the outer peripheral edge of the winding layer of the coil (33) Solenoid valve for control actuator.   The solenoid valves (30, 20, V) according to claim 1 are assembled, and the length directions of the flanges (31a, 31a) of the yoke (31) of each solenoid valve (30) in the same row or column are the same. Brake hydraulic pressure control actuator characterized by that.   The length direction of the flange (31a, 31a) of the yoke (31) of the electromagnetic valve (30, 20, V) is aligned with the lateral direction (L) of the actuator (A). The brake fluid pressure control actuator described in 1.   Eight solenoid valves (30, 20, V) according to claim 1 are incorporated in the housing (10) of the hydraulic pressure control actuator (A), and the four solenoid valves (30, 20, V). The two solenoid valves (30, 20, V) on both sides of the two rows are arranged in two rows one by one, and the tip edge of the yoke (31) faces outward, respectively. Brake hydraulic pressure control actuator.   Eight solenoid valves (30, 20, V) according to claim 1 are incorporated in the housing (10) of the hydraulic pressure control actuator (A), and the four solenoid valves (30, 20, V). The two solenoid valves (30, 20, V) on both sides of the two rows are arranged in two rows one by one, and the tip edge of the yoke (31) faces inward, respectively. Brake hydraulic pressure control actuator.

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