JPH0585854B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a torque sensing type disk brake that makes it possible to measure the output state of the brake.

[Background of the invention]

As is well known, a disc brake brakes the rotation of the rotor by pressing a friction pad against the rotating surface of the rotor in response to an input applied through a hydraulic or mechanical input means. Various models have been provided according to various design philosophies, such as directly receiving the brake torque from fixed parts of the vehicle (e.g., knuckles, supports, etc.) or indirectly receiving the pressure through calipers, etc. There is.

In addition, in order to achieve safe braking of the vehicle, such braking equipment uses a proportioning valve that controls the distribution of brake force between the front and rear wheels, taking into account the load transfer during braking, and a proportioning valve that controls the distribution of braking force between the front and rear wheels, which takes into account load transfer during braking, and doubles the number of times the brake pedal is pressed. They are also used in organic combination with various devices, such as boosters that force the wheels to move, or anti-lock devices that prevent wheels from locking on frozen roads.

By the way, from the above-mentioned viewpoint, for example, the relationship between the brake devices applied to each of the four wheels of a vehicle (front and rear wheels, or left and right wheels) is considered to be suitable for safe braking of the vehicle. In order to control the output of each brake device, or to always generate a constant braking force at a constant pedal force by using a relational configuration with a booster that boosts the pedal force, and for wheel anti-lock control. It is desirable to configure a feedback control system that detects the condition and feeds back information to the input control equipment for each brake device, but in reality, even if there is a system that detects the wheel rotation condition, No control system has been found that directly detects the output. This is mainly due to the problem that it is difficult to construct a configuration that measures and detects the output of the brake device as a physical quantity with high reproducibility.

[Purpose of the invention]

The present invention has been made in view of the above, and an object thereof is to provide a torque sensing type disc brake having a structure suitable for measuring and detecting the output of the disc brake as a highly reproducible physical quantity. It is in.

[Summary of the invention]

A feature of the disc brake according to the present invention, which has been made to achieve such an object, is that the disc brake is arranged so as to straddle a part of the edge of the rotor, and the pair of friction pads on both sides of the rotor are pressed against the rotor. A caliper with a built-in piston-cylinder device; a support member that supports the caliper and is provided to receive braking torque acting on the friction pad directly or via the caliper; a fixed support member provided with an anchor portion that is rotatably supported around the pin by a pin member and that engages with the support member to restrain rotation around the pin; The structure includes a means for detecting rotational force of the support member.

In the above configuration of the present invention, the rotational force detection means provided in the anchor part may be implemented using a method of using a load cell that engages directly or indirectly with the support member and using an output signal of the load cell as a rotational force detection signal, or It is constructed by arranging a piston-cylinder device containing a piston that directly or indirectly engages with a member and is pressed by its rotational force, and detecting the hydraulic state generated in the hydraulic chamber due to the pressing force of the piston. can do.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a front view of the disc brake, and FIG. 2 is a sectional view taken along line A--A in the disc brake.

In these figures, 1 is a rotor, 2 is a caliper placed so as to straddle the edge of the rotor 1, and a friction pad 6 is pressed against the rotor 1 within the leg 3 on one side (inner side) of the rotor 1. In order to do this, a brake hydraulically actuated piston-cylinder device 4 is built in, and a friction pad 7 is fixed to the opposite leg 5. This caliper 2 is movably supported in the rotor axial direction by a support member 8 (described later) via a sliding support device (not shown), and the friction pad 6 on the inner side is supported by the operation of the piston-cylinder device 4.
When pressed against the rotor 1, the reaction force causes the rotor to slide toward the inner side in the axial direction, causing the outer leg 5 to press the outer friction pad 7 against the rotor 1, and the braking force due to these pinching forces. This will result in

The support member 8 described above is formed and arranged on one side (inner side) of the rotor 1 by processing a metal flat plate so as to have a recess 9 that is open toward the outer diameter of the rotor. The inner friction pad 6 is movably supported in the recess 9 in the rotor axial direction, and a sliding support device (not shown) is provided at each end side of the arm part of the recess spaced apart in the rotor circumferential direction. The caliper 2 is slidably supported therebetween.

In addition, at the substantially central position in the circumferential direction of the rotor at the bottom of the recess 9 of the support member 8 in this example, a nut (fixing member) is provided with a bolt (pin member) 10.
A supporting connection with 11 is provided. The details of this support connection part are shown in FIG. The support member 8 is clamped by the radial flange 12a and the nut 11, and is supported around the outer periphery of the nut member 12 so as to be allowed to rotate.

That is, with this configuration, the support member 8
is supported by a knuckle 11 in a state where it is allowed to rotate around the bolt 10 in a plane parallel to the rotational plane of the rotor 1.

Next, the anchor portion of the knuckle 11 will be explained. The anchor portion of this example is located at the bottom surface of the support member 8, which is generally concave, at positions on the rotor insertion side and rotor rotation side, and is slightly connected to the bottom surface of the support member 8. The knuckles 11 are opposed to each other with a gap therebetween, and load cells 13, 13, which engage with the support member 8, are fixed to the opposing parts of the knuckles 11, respectively. This load cell 13,
13 is connected to a pressure detection circuit (not shown) via a lead wire.

According to this configuration, when the friction pads 6 and 7 are pressed against the rotor by brake operation and brake torque is applied, the brake torque is applied to the support member 8 directly on the inner side and via the caliper on the outer side. This causes the support member 8 to generate a rotational force around the bolt 10. This rotational force is received by the load cell 13 of the anchor part, and the magnitude of the rotational force can be obtained as electrical information based on the signal state detected by the load cell 13, and such detection information can be used, for example, in the vehicle. It can be used as control information used in a control mechanism for brake hydraulic pressure distribution between front and rear wheels, or as information for generating a constant brake force at a constant pedal force by being fed back to a booster, or as control information for a wheel lock prevention device. It can be used effectively as a.

Note that the present invention is not limited to the above-mentioned embodiments. For example, in the above-mentioned embodiments, the anchor portions are provided in a symmetrical pair on both sides of the support member in the circumferential direction. It may be made asymmetrical considering the difference in brake torque, or one may be omitted.

Further, the disc brake device is not limited to the above configuration, and for example, both of the pair of friction pads may be directly supported by a support member, or both may be supported by a caliper.

〔Effect of the invention〕

As described above, the torque sensing type disc brake according to the present invention is capable of suitably realizing brake torque detection that has not been seen before, and is highly useful.

[Brief explanation of the drawing]

FIG. 1 is a front view of a disc brake according to the present invention, and FIG. 2 is a sectional view taken along line A--A in FIG. 1... Rotor, 2... Caliper, 3, 5... Leg, 4... Piston-cylinder device, 6, 7...
Friction pad, 8... Support member, 9... Recess,
10...Bolt, 11...Nutsuru, 12...Nut member.

Claims (1)

[Claims] 1 A caliper that is disposed so as to straddle a part of the edge of the rotor and has a built-in piston-cylinder device that presses a pair of friction pads on both sides of the rotor against the rotor; A support member provided to receive applied brake torque directly or via a caliper, and this support member supported rotatably around the pin by a pin member extending in the rotor axial direction,
and a fixed support body provided with an anchor portion that engages with the support member and restrains rotation around the pin, the anchor portion being provided with means for detecting rotational force of the support member. A disc brake characterized by: