JP2000168527A - Basic module for anti-lock brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To establish sole replaceability of a solenoid part of a solenoid valve by holding the solenoid part in removable engagement on a base furnished fast with an electronic control unit. SOLUTION: A solenoid part 14s of a solenoid valve 14 is held in removable engagement on a fluid unit cover 15 to serve as a base whereto an electronic control unit 12 is fixed, and an electrode terminal 16 on the solenoid part 14s is abutted in resilient abutting lock to a lead frame 17 of the cover 15, and through the lead frame 17, the control unit 12 is connected electrically with the solenoid part 14s. According to this configuration, the solenoid part 14s is replaceable solely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main module for an anti-lock brake device in which the structure of a module forming the main component of the anti-lock brake device is improved.

[0002]

2. Description of the Related Art When a vehicle is running on a slippery road surface, if a driver suddenly applies a brake or the like, there is a risk that a wheel lock occurs and a slip accident is caused. To deal with these dangers, the anti-lock brake (ABS) automatically adjusts the pressure of the working fluid for braking (brake pressure) when the brake pedal is depressed to prevent vehicle lock.
Devices have been developed and many vehicles equipped with such anti-lock brake devices are effective in preventing slip accidents.

FIG. 3 is a partially cutaway sectional view showing an example of a conventional core module for an antilock brake device.
The core module 1 for an anti-lock brake device shown in FIG. 1 is configured to perform wheel slip based on a difference between a wheel speed signal output from a wheel speed signal output device (not shown) provided for each wheel of the vehicle and a vehicle speed signal. An electronic control unit 2 for calculating a rate is calculated. An optimum braking force is calculated by calculation so that the wheel slip rate calculated by the electronic control unit 2 converges to a target slip rate, and a control signal is output to the fluid unit 3. I do. The fluid unit 3 is configured by disposing an electromagnetic valve 4 in the flow path of the working fluid for braking. The electromagnetic valve 4 is opened and closed in response to an output control signal of the electronic control unit 2, and the operation for braking is performed. The pressure of the fluid is made variable. The plunger (valve shaft) is electromagnetically driven in response to the excitation and demagnetization of the solenoid unit 4s,
This is a kind of control valve for switching the valve opening degree of v, and the control valve shown in this example is configured so that the solenoid portion 4s and the valve portion 4v can be separated at the plunger portion.

The electronic control unit 2 is configured by assembling an electronic device (not shown) such as a microprocessor on a flat circuit board 2a, and holds the circuit board 2a on a fluid unit cover 5 serving as a base. Have been. Since the above-mentioned wheel speed signal output device is connected to the electronic control unit 2 via a wire harness (not shown), a connector 5a for connecting the wire harness is formed integrally with a part of the fluid unit cover 5. It is. The solenoid portion 4s is configured by housing an excitation coil in a cylindrical casing, and is fixed to a surface of the fluid unit cover 5 on a side opposite to the electronic control unit 2. A pair of electrode terminals 6 extend from an end surface of the casing of the solenoid portion 4s, and the pair of electrode terminals 6 are connected and fixed to a lead frame 7 integrally attached to the fluid unit cover 5 by welding 8. . A pair of legs 5b protrude from the fluid unit cover 5, and the ends of the legs 5b fix the mounting position of the solenoid 4s. The tip of the lead frame 7 penetrates the circuit board 2a,
The penetrating portion is connected to the board circuit by solder 9.

When assembling the core module 1 for an antilock brake device, first, the electrode terminals 6 of the solenoid portion 4s are welded to the lead frame 7 formed on the fluid unit cover 5. Next, the electronic control unit 2 is assembled and fixed to the fluid unit cover 5 together with the circuit board 2a. Further, the distal end of the lead frame 7 and the distal end of the connection pin 10 held by the connector 5a formed on the fluid unit cover 5 are fixed to the circuit board 2a of the electronic control unit 2 by soldering. Finally, the fluid unit cover 5 is assembled to the fluid unit 3 so that the plunger of the solenoid portion 4s is engaged with the fluid unit 3 in which the valve portion 4v of the solenoid valve 4 is incorporated, and the entire core module 1 is integrated. .

[0006]

The conventional core module 1 for an anti-lock brake device is subjected to a product inspection at the final stage of the manufacturing process. In this product inspection, a defect is found in the exciting coil in the solenoid 4s. If
The electrode terminal 6 of the solenoid section 4s is connected to the fluid unit cover 5
Is fixed by welding to the lead frame 7 partially embedded in the
It is impossible to remove the fluid unit cover and repair it, and since the fluid unit cover 5 must be discarded with the solenoid part 4s assembled, there is a problem that the manufacturing cost is high.

[0007] A core module 1 for an anti-lock brake device, which has been passed through product inspection and is actually mounted on a vehicle.
However, even when the solenoid portion 4s fails in the process of use, since the solenoid portion 4s is fixed by welding to the lead frame 7 of the fluid unit cover 5, the entire fluid unit cover 5 is replaced while the solenoid portion 4s is assembled. However, there were problems such as high repair costs.

The present invention has solved the above-mentioned problem, and has a base on which an electronic control unit is fixed, in which a solenoid portion of an electromagnetic valve is held so as to be able to be disengaged and detached, and the solenoid portion can be independently replaced. The purpose is to do so.

[0009]

SUMMARY OF THE INVENTION The present invention provides an electronic control unit which calculates an optimum braking force according to a wheel slip ratio and outputs a control signal corresponding to the optimum braking force, and a control of the electronic control unit. The valve unit is driven to open and close by a solenoid unit that is energized and demagnetized upon receiving the output, and an electromagnetic valve that pressure-controls the working fluid for braking, and the electronic control unit is fixed and the electromagnetic valve is held in a detachable manner, And a base for electrically connecting the electronic control unit and the solenoid unit via a conductor unit in which an electrode terminal of the solenoid unit elastically abuts and locks. is there.

Further, the base has at least a pair of engagement holes, and the solenoid portion falls into the engagement holes by changing a posture of the solenoid portion after being loosely fitted in each of the engagement holes. It is characterized by having an engaging projection that engages impossible.

Still further, the conductor portion is a lead frame held on the base, and the electrode terminal of the solenoid portion includes a contact piece that elastically abuts and locks on the lead frame. It is characterized by the following.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view of a main part of an embodiment of a main module for an anti-lock brake device of the present invention, and FIG. 2 is a partially cut-away sectional view of a main part of the main module for an anti-lock brake device shown in FIG. FIG.

A main module 11 for an antilock brake device shown in FIGS. 1 and 2 holds a solenoid valve 14 in a fluid unit cover 15 which is a base for fixing an electronic control unit 12 so as to be capable of engaging and disengaging. The electrode terminals 16 of the 14 solenoid portions 14s are elastically brought into contact with the lead frames 17 of the fluid unit cover 15, and the electronic control unit 12 and the solenoid portions 14s are electrically connected via the lead frames 17. It is configured. The electronic control unit 12 is configured by assembling an electronic device such as a microprocessor on a circuit board 12a, calculates an optimal braking force according to a wheel slip ratio, and outputs a control signal corresponding to the optimal braking force. do.

The solenoid valve 14 comprises a valve portion 14v incorporated in the fluid unit 13, and a solenoid portion 14s which is demagnetized by the control output of the electronic control unit 12 to open and close the valve portion 14v. And solenoid part 1
4s can be separated at the plunger portion.
Therefore, when the fluid unit cover 15 is assembled to the fluid unit 13, the plunger portion is connected to the valve unit 1 by the solenoid unit 14 s integrated with the fluid unit cover 15.
4v can be integrated with the valve portion 14v.

The fluid unit cover 15 as a base shown in the present embodiment has an electrode terminal 1 of the solenoid portion 14s.
A lead frame 17 is partially embedded and formed as a conductor portion that elastically abuts and locks the electronic control unit 12 and the solenoid unit 1 via the lead frame 17.
4s is electrically connected. Also,
The fluid unit cover 15 is provided with a pair of engagement holes 21 for each solenoid valve 14. Each engagement hole 21 has a shape in which a large diameter hole 21a and a small diameter hole 21b are connected in a gourd shape,
The electromagnetic valve 14 can be removably engaged with the fluid unit cover 15 by engaging engagement protrusions 22 described later provided on the solenoid portion 14s. 15a is a connector for connecting a wire harness extending from the wheel speed signal output device, and 15b is a leg that abuts and locks on the side surface of the casing of the solenoid portion 14s to fix the mounting position.

The solenoid portion 14s of the solenoid valve 14 has an exciting coil housed in a cylindrical casing. A pair of electrode terminals 16 and a pair of engaging projections 22 extend in the axial direction from the end face of the casing. ing. Electrode terminal 16
Is a base 16 extending in an inverted L-shape from the casing end face.
a, and a contact piece 16b bent obliquely rearward from the end of the base 16a. The elastic piece generated in the contact piece 16b when the contact piece 16b is deformed in a direction approaching the base 16a. The restoring force moves the contact piece 16b to the lead frame 1
7 is provided with an elastic force for pressing and contacting.

The engagement projection 22 is provided on the fluid unit cover 15.
In the axially intermediate portion of the cylindrical body having an intermediate diameter between the large-diameter hole portion 21a and the small-diameter hole portion 21b of the engagement hole 21, the diameter of the engagement hole 21 of the fluid unit cover 15 is slightly smaller than that of the small-diameter hole portion 21b. The small diameter portion 22a is formed. Therefore, the engaging projection 22 has a shape in which a large-diameter portion 22b having the same diameter as the columnar body is connected to both sides of the small-diameter portion 22a, and both large-diameter portions 22b are formed in the opening of the small-diameter hole portion 21b of the fluid unit cover 15. Part around the fluid unit cover 15 and the solenoid unit 1
It functions as a 4s retainer. That is, the engaging projection 22 has a tip portion at the engaging hole 2 of the fluid unit cover 15.
1 through the large-diameter hole 21a, the small-diameter portion 22a is loosely fitted into the large-diameter hole 21a, and further from this state, the solenoid portion 14s is moved horizontally to engage the small-diameter portion 22a with the small-diameter hole 21b. By doing so, it is possible to engage with the engagement hole 21.

A pair of engaging projections 22 of the solenoid portion 14s
Is engaged with the pair of engagement holes 21, and the fluid unit cover 15 is connected to the upper and lower large-diameter portions 22 of the engagement protrusions 22 as described above.
Since b is clamped from above and below, the solenoid portion 14s is assembled to the fluid unit cover 15 so as not to fall off.
When the assembly is completed, the contact portion 16b of the electrode terminal 16 is already elastically abutted against the lead frame 17 so that the solenoid portion 14s is connected to the electrode terminal 16 via the lead frame 17. Thus, the electronic control unit 12 is securely electrically connected to the electronic control unit 12.

As described above, the core module 11 for the antilock brake device is provided with the electromagnetic valve 14 on the fluid unit cover 15 which is a base on which the electronic control unit 12 is fixed.
Of the solenoid unit 14s of the solenoid valve 14 is elastically abutted against the lead frame 17 of the fluid unit cover 15, and the lead of the fluid unit cover 15 is Since the electronic control unit 12 and the solenoid unit 14s are electrically connected via the frame 17, the solenoid unit 14s can be independently replaced. That is, even if a defect is found in the excitation coil in the solenoid portion 14s during product inspection at the final stage of the manufacturing process, or when the solenoid portion 14s breaks down in the use process, the solenoid portion 14 As in the conventional module 1 in which the electrode terminals 16 are welded and fixed to the lead frame 17 of the fluid unit cover 15, the solenoid unit 4s
It is not necessary to discard the entire fluid unit cover 5 with the electrode frame 16 assembled. Since the electrode terminals 16 only elastically abut against the lead frame 17 of the fluid unit cover 15, the lead frame 17 In contrast, the solenoid unit 14s, which can be freely engaged and disengaged, can be detached from the module 11 and easily replaced or repaired.

The fluid unit cover 15 has at least a pair of engagement holes 21, and the solenoid portion 14s
Since the engagement projections 22 are engaged with the engagement holes 21 irreversibly by changing the attitude of the solenoid portion 14s after loosely fitting the engagement holes 21, the engagement holes 21 of the fluid unit cover 15 are provided. By taking the procedure of engaging the engaging projections 22 after loosely fitting, the solenoid portion 14s can be easily engaged with the fluid unit cover 15. Also, when the solenoid portion 14s is detached from the fluid unit cover 15, if the engagement posture of the solenoid portion 14s is changed so that the engagement protrusion 22 is loosely fitted in the engagement hole 21, the solenoid portion 14s is thereafter removed. Since it can be easily detached, the replacement work of the solenoid portion 14s can be easily performed in a short time.

The electrode terminal 16 of the solenoid portion 14s
Is provided with a contact piece 16b that elastically contacts and locks the lead frame 17, so that the contact piece 1 that elastically contacts the lead frame 17 held on the fluid unit cover 15 is provided.
As long as the engagement state between the engagement protrusion 22 and the engagement hole 21 is maintained, the contact portion 6b keeps abuttingly engaging with the lead frame 17 within the range of the elastic force provided in the contact piece portion 16b. Without the electrode terminals 16 of the fluid unit cover 15 being welded and fixed to the lead frame 17, the solenoid portion 14 s and the electronic control unit 12 can be reliably electrically connected to each other through the contact piece portion 16 b and the lead frame 17. it can.

In the above embodiment, when the engaging projection 22 is engaged with the engaging hole 21, the solenoid portion 14s is moved in the horizontal direction.
By rotating s around its own axis by a predetermined angle, the two can be engaged with each other. In order to lock the engagement state between the engagement hole 21 and the engagement protrusion 22, a stopper (not shown) for regulating the displacement of the solenoid portion 14 s is provided in the fluid unit 13, and the fluid unit cover 15 is provided.
When this is assembled to the fluid unit 13, the stopper may be locked to the solenoid portion 14s to restrict the displacement.

[0023]

As described above, according to the present invention,
The solenoid valve is held on the base on which the electronic control unit is fixed so that the solenoid valve can be engaged and disengaged, and the electrode terminal of the solenoid part of the solenoid valve is elastically abutted on the conductive part of the base to lock. Since the electronic control unit and the solenoid unit are electrically connected via the body, the solenoid unit can be replaced independently.Therefore, when the product is inspected at the final stage of the manufacturing process, the solenoid inside the solenoid unit is removed. Even when a defect is found in the excitation coil or when the solenoid part breaks down in the process of use, like the conventional module in which the electrode terminal of the solenoid part is fixed by welding to the conductor part of the base, There is no need to dispose the entire base with the solenoid installed, but only the electrode terminals are elastically abutted against the conductors of the base, so the base must be discarded. Remove the solenoid portion itself freely disengaged from the module, easily replaced or can be repaired, thereby an excellent effect, such as the cost of maintaining manufacturing cost can be greatly reduced.

Further, the base has at least a pair of engagement holes, and the solenoid portion falls into the engagement holes by changing the posture of the solenoid portion after being loosely fitted in each of the engagement holes. It is possible to easily engage the solenoid part with the base by taking the procedure of engaging the engagement protrusion with the engaging hole of the base after loosely fitting, since the engagement part is provided with the engaging projection that cannot be engaged. Yes, and when removing the solenoid from the base,
If the engagement posture of the solenoid is changed so that the engagement protrusion is loosely fitted into the engagement hole, the solenoid can be easily detached later, making it easy to replace the solenoid in a short time. It has effects such as being able to do.

Further, the conductor portion is a lead frame held on the base, and the electrode terminal of the solenoid portion has a contact piece that elastically contacts and locks the lead frame. As long as the contact portion elastically abutting on the lead frame held on the base is maintained in the engagement state between the engagement protrusion and the engagement hole, the contact portion is within the range of the elastic force provided on the contact portion. This keeps the contact between the solenoid and the electronic control unit through the contact piece and the lead frame without having to weld and fix the electrode terminal of the solenoid to the conductor of the base as in the past. And the like.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing an embodiment of a core module for an antilock brake device of the present invention.

FIG. 2 is a partial cross-sectional view of a main part of the core module for the antilock brake device shown in FIG.

FIG. 3 is a partially cutaway sectional view showing an example of a conventional core module for an antilock brake device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Core module for antilock brake devices 12 Electronic control unit 13 Fluid unit 14 Solenoid valve 14s Solenoid part 14v Valve part 15 Fluid unit cover (base part) 16 Electrode terminal 17 Lead frame (conductor part) 21 Engagement hole 21a Large diameter hole Portion 21b Small diameter hole 22 Engagement projection 22a Small diameter portion 22b Large diameter portion

Claims (3)

[Claims] An electronic control unit that calculates an optimal braking force according to a wheel slip ratio and outputs a control signal corresponding to the optimal braking force, and is demagnetized upon receiving a control output of the electronic control unit. The solenoid unit opens and closes the valve unit, and the solenoid valve that pressure-controls the working fluid for braking, fixes the electronic control unit, holds the solenoid valve in a detachable manner, and has an electrode terminal of the solenoid unit. A core module for an anti-lock brake device, comprising: a base that electrically connects the electronic control unit and the solenoid unit via a conductor unit that elastically abuts and locks. 2. The base has at least a pair of engagement holes, and the solenoid portion falls into the engagement holes by changing a posture of the solenoid portion after being loosely fitted in each of the engagement holes. The main module for an anti-lock brake device according to claim 1, further comprising an engaging projection that is improperly engaged. 3. The conductor section is a lead frame held on the base, and an electrode terminal of the solenoid section is
2. The core module for an anti-lock brake device according to claim 1, further comprising a contact piece that elastically abuts and locks on the lead frame.