JP5134566B2 - Brake hydraulic pressure control device for vehicle and manufacturing method thereof - Google Patents

Description

  The present invention relates to a vehicular brake hydraulic pressure control device in which a connection terminal of a coil assembly mounted on a solenoid valve and a connection terminal in a housing are connected, and a method for manufacturing the same.

  In general, a brake fluid pressure control device for a vehicle includes a base, a solenoid valve disposed on one surface of the base, a coil assembly that operates a valve mechanism in the solenoid valve with a magnetic force, and the coil assembly. And a housing provided with a control unit for controlling supply / stop of current and the like. In such a vehicle brake hydraulic pressure control device, conventionally, one end of the electromagnetic valve is mounted in the mounting hole of the base, the other end protrudes from the surface of the base, and the connection terminal of the coil assembly is connected to the housing. A structure is known in which a coil assembly is fixed in a state of being suspended from a housing via a connection terminal by projection welding to a connection terminal connected to a control unit (see Patent Document 1). In such a vehicle brake hydraulic pressure control device, when the housing is attached to the base body, the electromagnetic valve protruding from the base body is assembled so as to be surrounded by a substantially cylindrical coil assembly.

  In such a configuration, the coil assembly is fixed to the housing via the connection terminal, but the other portions are not fixed, and further, between the cylindrical portion of the coil assembly and the solenoid valve. There is a gap. Therefore, there is a problem that the coil assembly is shaken when excessive vibration is applied to the vehicle brake hydraulic pressure control device while the vehicle is running.

  Therefore, an elastic material is provided between one surface of the base and the housing, and a linear portion which is a part of the elastic material is provided between one surface of the base and the coil assembly and between adjacent coil assemblies. A vehicular brake hydraulic pressure control device has been invented that solves the above-mentioned problem by being configured to be sandwiched between them (see Patent Document 2).

Japanese Patent No. 3660297 JP 2007-22223 A

  However, in the above-described conventional vehicle brake hydraulic pressure control device (Patent Document 2), a linear portion of an elastic material is newly provided between one surface of the base body and the coil assembly and between adjacent coil assemblies. Therefore, the increase in the number of parts may cause an increase in manufacturing cost and an obstacle to downsizing.

  From this point of view, the present invention provides a vehicle brake hydraulic pressure control device that can suppress an increase in the number of components, and that can eliminate the cause of an increase in manufacturing cost and downsizing, and a method for manufacturing the same. Is an issue.

  The present invention for solving such problems includes a base, a solenoid valve disposed on one surface of the base, a coil assembly mounted on the solenoid valve, and a housing mounted on the one surface of the base. And a control unit housed in the housing, wherein the coil assembly and the housing are electrically connected to each other via a connection terminal, wherein the coil assembly includes: A bobbin having a cylindrical portion surrounding the electromagnetic valve, and a coil formed by winding an electric wire around the cylindrical portion, and the cylindrical portion tightens the electromagnetic valve with a predetermined tightening force. A vehicular brake hydraulic pressure control device comprising an appendage.

  According to the vehicle brake hydraulic pressure control device having the above-described configuration, the coil assembly is securely fixed to the solenoid valve without providing an elastic material between one surface of the base body and the coil assembly and between adjacent coil assemblies. And the fixing strength is increased. Therefore, the increase in the number of parts from Patent Document 1 can be eliminated, and the cause of an increase in manufacturing cost and an obstacle to miniaturization can be removed. Furthermore, since the fixing strength between the coil assembly and the solenoid valve is increased, the load on the connection terminal is reduced.

  In the present invention, the cylindrical portion is made of a material that is softened by heat. The cylindrical portion is softened by heat generated by energizing the coil, and is reduced in diameter along with the reduced diameter of the coil. It is preferable to constitute a tightening portion for tightening the electromagnetic valve. By setting it as such a structure, a solenoid valve can be fastened with the cylinder part of a coil assembly, a coil assembly can be fixed to a solenoid valve reliably, and fixed strength becomes high.

  Further, in the present invention, the cylindrical portion is configured to have an inner diameter smaller than the outer diameter of the electromagnetic valve, and a tightening portion that tightens the electromagnetic valve by press-fitting the electromagnetic valve therein. It is preferable to configure. By setting it as such a structure, a solenoid valve can be fastened with the cylinder part of a coil assembly, a coil assembly can be fixed to a solenoid valve reliably, and fixed strength becomes high.

  In the present invention, it is preferable that the electromagnetic valve is configured to be caulked and fixed to the base. By adopting such a configuration, the fixing strength of the electromagnetic valve to the base increases, so that vibration between the base and the electromagnetic valve can be suppressed, and the fixing strength between the coil assembly and the electromagnetic valve is further increased.

  The present invention further includes a base, a solenoid valve disposed on one surface of the base, a coil assembly mounted on the solenoid valve, a housing mounted on the one surface of the base, and a housing in the housing. A control unit to be housed, wherein the coil assembly and the housing are electrically connected to each other via a connection terminal. The coil is formed of a material that is softened by heat, and a coil is formed by winding an electric wire around the cylindrical portion of the bobbin. After the housing to which the coil assembly is fixed is assembled to the base, the coil is energized. A method for manufacturing a brake fluid pressure control device for a vehicle, wherein the cylinder portion is softened by heat generated by the operation, and the solenoid valve is tightened by reducing the diameter of the tube portion in accordance with the diameter of the coil. A.

  According to such a manufacturing method, the electromagnetic valve can be tightened by the cylindrical portion of the coil assembly without increasing the number of parts only by passing a current through the coil. Therefore, the coil assembly can be securely fixed to the electromagnetic valve without providing an elastic material between one surface of the base and the coil assembly and between adjacent coil assemblies as in the prior art, and the fixing strength is increased. Therefore, it is possible to remove the cause of an increase in manufacturing cost and an obstacle to miniaturization. Furthermore, since the fixing strength between the coil assembly and the solenoid valve is increased, the load on the connection terminal is reduced.

  Further, in the present invention, there is a manufacturing method in which the solenoid valve is caulked and fixed to the base by inserting the solenoid valve into a mounting hole formed in the base and plastically flowing the base around the mounting hole. preferable. By adopting such a manufacturing method, similarly to claim 4, the strength of fixing the electromagnetic valve to the base increases, so that vibration between the base and the electromagnetic valve can be suppressed. Fixing strength is further increased.

  According to the present invention, in the vehicle brake hydraulic pressure control device, it is possible to suppress an increase in the number of parts, and to exhibit an excellent effect that a factor of an increase in manufacturing cost and an obstacle to downsizing can be removed.

It is a partially broken side view showing a vehicle brake hydraulic pressure control device according to an embodiment of the present invention. It is the figure which showed the structure around a solenoid valve and a coil assembly, (a) is the principal part expanded sectional view which showed the state before electricity supply to a coil, (b) is the principal which showed the state after electricity supply to the coil FIG. It is the figure which showed the fixed state to the base | substrate of a solenoid valve, Comprising: (a) The principal part expanded sectional view which showed the state before caulking process, (b) The principal part expanded cross section which showed the state after caulking process FIG.

(First embodiment)
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the description of the present embodiment, the “vertical direction” is the same direction as the vertical direction of the paper surface of FIGS. 1 to 3 on the basis of the state in which the electromagnetic valve is assembled into the mounting hole of the base body from above.

  As shown in FIG. 1, the vehicular brake hydraulic pressure control device 1 includes a base body 10, an electromagnetic valve 30 disposed on one surface 11 of the base body 10, and a coil assembly 50 attached to the electromagnetic valve 30. The housing 70 is mounted on the one surface 11 of the base body 10, and the control unit 80 is accommodated in the housing 70. An electric motor 90 that drives a pump (not shown) is provided on the back surface of the first surface 11 of the base body 10.

  The base 10 is a metal member formed in a substantially rectangular parallelepiped, and a brake fluid flow path is formed therein. A mounting hole 12 for mounting the electromagnetic valve 30 is formed on one surface 11 of the base body 10. For example, eight mounting holes 12 are formed and arranged in two rows and four columns. The structure around the solenoid valve 30 and the mounting hole 12 will be described in detail later.

  The housing 70 closes the housing main body 71 having a first housing portion 71a that opens toward the base body 10 and a second housing portion 71b that opens toward the opposite side of the base body 10, and the second housing portion 71b. And a lid 72 for the purpose. The control unit 80 is accommodated in the second accommodating portion 71b. The housing 70 and the control unit 80 constitute a housing unit.

  The housing main body 71 is formed in a substantially rectangular tube shape with resin, and a partition wall 73 that partitions the internal space into a first housing portion 71a and a second housing portion 71b is formed therein. A rubber seal mounting groove 74 is formed in the peripheral edge of the first housing portion 71a on the base 10 side opening. An annular rubber seal (elastic material) 75 is fitted in the rubber seal mounting groove 74, and when the housing 70 is mounted on the base body 10, the space between the housing body 71 and the base body 10 is sealed. The partition wall 73 is formed with an insertion hole 76 for inserting the coil assembly 50 from the first housing portion 71a side. A connection terminal 77 is provided in the insertion hole 76. The connection terminal 77 is formed as a part of a metal plate embedded in the housing body 71 and protrudes from the hole wall surface of the insertion hole 76.

  The control unit 80 is a control board for controlling the operation of each electromagnetic valve 30 and the electric motor 90 by appropriately controlling the current (energization) supplied to the coil assembly 50, the electric motor 90, and the like. The portion 71 is fixed to the second accommodating portion 71b side. The control unit 80 is electrically connected to the coil assembly 50 and the electric motor 90 via a metal plate embedded in the housing main body 71.

  Hereinafter, the structure around the electromagnetic valve 30 and the coil assembly 50 will be described in detail with reference to FIGS. 2 and 3. In FIG. 2, the normally open type electromagnetic valve 30 is shown, but the configuration of the coil assembly 50 around it is the same as that of the coil assembly 50 around the normally closed type electromagnetic valve 30. is there.

  As shown in FIG. 2, the electromagnetic valve 30 includes a guide cylinder 31 surrounded by the coil assembly 50 and a valve housing which is inserted into the inner peripheral side of the guide cylinder 31 and fixed around the guide cylinder 31 by welding. 32, and is formed in a substantially cylindrical shape with a step. A movable core 33 that moves by the magnetic force generated by the coil assembly 50 is provided in the guide cylinder 31, and a valve mechanism 34 that opens and closes the valve as the movable core 33 moves is provided in the valve housing 32. ing. The solenoid valve 30 is fixed to the base body 10 with the valve housing 32 embedded in the mounting hole 12 formed on the one surface 11 of the base body 10 and the guide cylinder 31 protruding from the one surface 11.

  As shown in FIGS. 2 and 3, a ring-shaped groove 35 is formed on the outer peripheral surface of the valve housing 32. The groove 35 has a substantially V-shaped cross section. An outer peripheral surface 32 a (see FIG. 3) adjacent to the lower side of the groove portion 35 of the valve housing 32 is formed to have a diameter substantially equal to that of the inner peripheral surface 12 a of the mounting hole 12. An outer peripheral surface 32b (see FIG. 3) adjacent to the upper side of the groove portion 35 of the valve housing 32 is formed with a smaller diameter than the lower outer peripheral surface 32a.

  The electromagnetic valve 30 is caulked and fixed to the base body 10. Specifically, as shown in FIG. 3B, the base body 10 (the base body 10 around the valve housing 32) at the upper peripheral edge of the mounting hole 12 is plastically flowed into the groove 35 to form the plastic deformation portion 13. Thus, the electromagnetic valve 30 is locked to the base body 10 and fixed by caulking.

  As shown in FIG. 2, the coil assembly 50 includes a bobbin 51 having a cylindrical portion 51a surrounding the guide cylinder 31 of the solenoid valve 30, a coil 52 formed by winding an electric wire 52a around the cylindrical portion 51a, and this coil. 52 and a magnetic path frame 54 having a substantially U-shaped cross section that is attached to the bobbin 51 so as to sandwich both ends of the bobbin 51 in the axial direction. At both ends in the axial direction of the cylindrical portion 51a of the bobbin 51, flange portions 51b and 51b are respectively formed. The connection terminal 53 protrudes outward in the axial direction from the flange portion 51 b at one end (upper side) of the bobbin 51. The coil assembly 50 is fixed to the housing 70 by projection welding the connection terminal 53 to the connection terminal 77 of the housing 70. Before the housing 70 is attached to the base body 10, the coil assembly 50 is fixed in a state of being suspended from the housing 70 via the connection terminals 53. At this time, the cylinder part 51 a has an inner diameter slightly larger than the outer diameter of the guide cylinder 31 of the electromagnetic valve 30, and a clearance C is secured between the cylinder part 51 a of the bobbin 51 and the electromagnetic valve 30. (See FIG. 2A).

  The cylindrical portion 51a of the bobbin 51 is made of a thermoplastic resin material (for example, polyamide) that is softened by heat. The electric wire 52a is made of a copper wire. The electric wire 52a is wound around the cylindrical portion 51a of the bobbin 51 with tension applied to such an extent that stress remains in the direction in which the cylindrical portion 51a of the bobbin 51 is tightened radially inward. The cylindrical portion 51a is softened by heat generated by energizing the coil after the housing 70 is attached to the base body 10, and is reduced in diameter along with the reduced diameter of the coil 52, and has a predetermined tightening force. A tightening portion 55 for tightening the electromagnetic valve is configured.

  Next, the manufacturing method of the vehicle brake hydraulic pressure control device 1 having the above-described configuration and the operation of the vehicle brake hydraulic pressure control device 1 will be described.

  First, the mounting hole 12 of the electromagnetic valve 30 is formed in the base body 10 formed into a predetermined shape. Further, before and after the above-described operation, a hole (hole) for mounting a reservoir, a pump, or the like (not shown) is formed at an appropriate position of the base 10, and the surface of the base 10 is drilled so that the inside of the base 10 is formed. A brake fluid flow path (not shown) and the like are formed on the surface.

  Next, the electromagnetic valve 30 is inserted into the mounting hole 12. Then, the plastic deformation part 13 (refer FIG.3 (b)) is formed in the hole wall of the attachment hole 12, and the solenoid valve 30 is crimped and fixed. Specifically, as shown in FIG. 3A, after the electromagnetic valve 30 is inserted into the mounting hole 12, a caulking jig E having a bottomed cylindrical shape is pressed against the upper peripheral edge of the mounting hole 12. Then, by pressing toward the bottom surface of the mounting hole 12, the base body 10 (base body 10 around the valve housing 32) around the mounting hole 12 (upper peripheral edge portion) is plastically flowed inwardly in the hole diameter direction, and is plastically deformed. Part 13 is formed. At this time, the plastic deformation portion 13 is in contact with the outer peripheral surface 32b of the valve housing 32 at a portion above the groove portion 35, and enters the groove portion 35 at a portion corresponding to the groove portion 35. As a result, the electromagnetic valve 30 is caulked and fixed to the base 10.

  Thus, a part of the base body 10 enters the groove 35 of the valve housing 32, so that the electromagnetic valve 30 is locked to the base body 10. Further, since the plastic deformation portion 13 presses the valve housing 32 toward the radial center in the portion above the groove portion 35, a large-area seal surface is formed between the valve housing 32 and the mounting hole 12, The electromagnetic valve 30 is held in the mounting hole 12 so as not to come out.

  Before or after the electromagnetic valve 30 is assembled to the base 10, a reservoir, a pump (not shown), an electric motor 90, etc. are assembled to the base 10.

  Thereafter, the housing 70 is assembled to the base body 10 so as to cover the electromagnetic valve 30. At this time, as shown in FIG. 2A, since the clearance C is secured between the cylinder portion 51a of the coil assembly 50 and the electromagnetic valve 30, the guide cylinder 31 of the electromagnetic valve 30 is connected to the coil. It can be smoothly inserted inside the bobbin 51 of the assembly 50.

  When the housing 70 is fixed to the base body 10, the coil assembly 50 surrounds the electromagnetic valve 30 with a gap (clearance C).

  Thereafter, the cylindrical portion 51 a of the bobbin 51 is softened by the heat generated by energizing the coil 52, and the diameter of the cylindrical portion 51 a is reduced along with the diameter reduction of the coil 52 to tighten the electromagnetic valve 30. As a result, as shown in FIG. 2 (b), the clearance C between the cylinder portion 51a and the electromagnetic valve 30 is eliminated, and the electromagnetic valve 30 has the cylinder portion 51a (tightening) of the bobbin 51 with a predetermined tightening force. Part 55).

  For example, a constant current is continuously applied for a predetermined time. If it does in this way, the cylinder part 51a will be heated suitably and will be softened. At this time, since the tensile stress (tension) is applied to the electric wire 52a that constitutes the coil 52, the coil 52 remains subjected to stress for tightening the cylindrical portion 51a. Therefore, the softened cylindrical portion 51 a is tightened radially inward by the coil 52 and is integrally reduced in diameter with the coil 52.

  The strength of the current to be supplied to the coil 52 and the current supply time depend on the material of the bobbin 51 and the thickness of the cylindrical part 51a, the tension of the electric wire 52a of the coil 52, the number of turns and the heat generation rate, and the necessary diameter reduction amount of the bobbin 51. It can be set accordingly. Further, by setting the diameter reduction amount of the bobbin 51, it is possible to change and set the inner diameter dimension of the cylindrical portion 51a.

  In order to energize the coil 52, for example, a program for energizing the coil 52 with a predetermined ampere current for a predetermined time at the first start-up is input to the control unit 80 in advance, and a coupler is connected to the control unit 80 to turn on the power. This can be done by starting the program.

  According to the vehicle brake hydraulic pressure control device 1 described above, the coil assembly is provided without providing an elastic material between the one surface 11 of the base body 10 and the coil assembly 50 and between the adjacent coil assemblies 50 and 50. 50 can be securely fixed to the electromagnetic valve 30. Therefore, it is possible to prevent the load from being repeatedly applied to the connection terminal 53 and its connection place without the coil assembly 50 being shaken.

  In particular, in the vehicular brake hydraulic pressure control apparatus 1, the cylinder portion 51 a of the bobbin 51 of the coil assembly 50 serves as the tightening portion 55, and the electromagnetic valve 30 is held by the entire cylinder portion 51 a. The area increases and the fixing strength increases. Further, the coil assembly 50 is supported at two points by connecting the cylindrical portion 51a of the bobbin 51 to the electromagnetic valve 30 and connecting the connection terminal 53 to the connection terminal 77 of the housing 70. In addition, the load applied to the connection fixing portions of the connection terminals 53 and 77 can be reduced.

  Furthermore, since the diameter of the cylindrical portion 51a of the bobbin 51 is reduced by utilizing the tension at the time of winding of the electric wire 52a of the coil 52, the conventional parts are used without providing any separate parts. All you need to do is energize. Therefore, it is possible to eliminate the increase in the number of parts from the prior art of Patent Document 1 and to remove the cause of the increase in manufacturing cost and the obstacle to miniaturization.

  Further, since the electromagnetic valve 30 is caulked and fixed to the base body 10, the fixing strength of the electromagnetic valve 30 to the base body 10 is increased. Thereby, since the vibration of the electromagnetic valve 30 due to the vibration of the base body 10 can be suppressed, the fixing strength between the coil assembly 50 and the electromagnetic valve 30 is further increased and the vibration of the coil assembly 50 can be further suppressed.

(Second Embodiment)
In the second embodiment, although not shown, the cylindrical portion of the bobbin is configured to have an inner diameter slightly smaller than the outer diameter of the solenoid valve. Thus, when the housing is assembled to the base body, the electromagnetic valve is press-fitted into the bobbin cylindrical portion. Therefore, the cylinder portion becomes a tightening portion for tightening the electromagnetic valve with a predetermined tightening force. Since other configurations are the same as those in the first embodiment, description thereof will be omitted.

  Also according to this embodiment, the coil assembly can be securely fixed to the electromagnetic valve without providing an elastic material between one surface of the base and the coil assembly and between adjacent coil assemblies. Therefore, it is possible to prevent a repeated load from acting on the connection terminal and its connection location without the coil assembly being shaken.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a design change is possible suitably. For example, in the above-described embodiment, a program for energizing a current at the time of initial startup is input to the control unit 80 in advance to energize the coil 52. However, the energization method is not limited to this. Various methods can be employed. For example, an electric wire may be directly connected to the coil 52 after the housing 70 is attached to the base body 10 on the processing line.

  Moreover, in the said embodiment, although the connection terminal 53 of the coil assembly 50 and the connection terminal 77 of the housing 70 are joined by welding, the joining method is not limited to this, and other methods such as press fit are used. It may be a method.

DESCRIPTION OF SYMBOLS 1 Vehicle brake hydraulic pressure control apparatus 10 Base body 11 One surface 12 Mounting hole 30 Solenoid valve 50 Coil assembly 51 Bobbin 51a Tube part 52 Coil 52a Electric wire 53 Connection terminal 55 Fastening part 70 Housing 77 Connection terminal 80 Control unit

Claims (6)

A base, a solenoid valve disposed on one surface of the base, a coil assembly mounted on the solenoid valve, a housing mounted on the one surface of the base, and a control unit accommodated in the housing; With
A brake fluid pressure control device for a vehicle in which the coil assembly and the housing are electrically connected by a connection terminal,
The coil assembly includes a bobbin having a cylindrical portion surrounding the electromagnetic valve, and a coil formed by winding an electric wire around the cylindrical portion,
The said cylinder part comprises the clamping part which clamps the said solenoid valve with predetermined | prescribed clamping force. The brake fluid pressure control apparatus for vehicles characterized by the above-mentioned. The cylindrical portion is made of a material that is softened by heat, is softened by heat generated by energizing the coil, and is tightened to reduce the diameter of the coil and tighten the electromagnetic valve. The vehicle brake hydraulic pressure control device according to claim 1, wherein the vehicle brake hydraulic pressure control device is configured. The cylindrical portion is configured to have an inner diameter smaller than the outer diameter of the solenoid valve, and constitutes a tightening portion for tightening the solenoid valve by press-fitting the solenoid valve therein. The brake fluid pressure control device for a vehicle according to claim 1. The vehicular brake hydraulic pressure control device according to any one of claims 1 to 3, wherein the electromagnetic valve is fixed by caulking to the base body. A base, a solenoid valve disposed on one surface of the base, a coil assembly mounted on the solenoid valve, a housing mounted on the one surface of the base, and a control unit housed in the housing; With
A manufacturing method of a brake fluid pressure control device for a vehicle, wherein the coil assembly and the housing are electrically connected by a connection terminal,
The bobbin of the coil assembly is formed of a material that is softened by heat,
A coil is formed by winding an electric wire around the cylindrical portion of the bobbin,
After assembling the housing to which the coil assembly is fixed to the base body, the cylindrical portion is softened by heat generated by energizing the coil, and the cylindrical portion is reduced in diameter as the coil is reduced in diameter. And tightening the electromagnetic valve. A method for manufacturing a brake fluid pressure control device for a vehicle. Inserting the solenoid valve into a mounting hole formed in the base;
6. The method for manufacturing a vehicle brake hydraulic pressure control device according to claim 5, wherein the electromagnetic valve is caulked and fixed to the base body by plastic flow of the base body around the mounting hole.

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