JPH11310184A - Parking brake device of two-wheeler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the vibration of a caliper and the local wear of a brake pad by securing a parking brake function by use of simple constitution without enlarging the caliper and causing an increase in its weight and mass eccentricity. SOLUTION: A parking brake device, provided on a two-wheeler having a hydraulic disc brake including a disc rotor 27 mounted on one cross end face of the wheel boss part 26A of a rear wheel 17 and a hydraulic caliper placed around the disc rotor 27, is formed by a drum brake 30 having the wheel boss part 26A as a brake drum and an enlargeable brake shoe 29 placed on the inner periphery thereof. Thus, since the existing wheel boss part 26A is used as the brake drum of the mechanical drum brake 30 provided independently of the hydraulic disc brake, the desired parking function can be secured stably without making a structure complex or large.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle provided with a hydraulic disk brake including a disk rotor mounted on one end surface in the width direction of a wheel boss portion of a wheel and a hydraulic caliper disposed around the disk rotor. Parking brake device to be used.

[0002]

2. Description of the Related Art In a motorcycle equipped with a hydraulic disc brake, a master cylinder is operated by a turning operation force of a brake lever provided on a steering wheel to generate a hydraulic pressure. A braking force is obtained.

[0003] By the way, it has hitherto been impossible to provide a parking function to such a hydraulic disc brake.
In other words, even if the brake lever is fixed to the operating position and the hydraulic disc brake is maintained in the operating state, the hydraulic pressure fluctuates due to the passage of time or a change in temperature, so that the braking force gradually decreases. There was a problem that the parking brake function could not be obtained.

Therefore, conventionally, a mechanical brake is integrated into a caliper of a hydraulic disc brake, and a required parking function is performed by driving the caliper by the mechanical brake during parking.

[0005]

However, if the mechanical brake is integrated into the caliper of the hydraulic disc brake, the caliper becomes larger and heavier, leading to an increase in cost and a reduction in appearance. Since the center of gravity is deviated, it is disadvantageous to vibration, and problems such as knitting of the brake pad occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to secure a parking brake function with a simple structure without increasing the size and weight of the caliper and the center of gravity of the knitting. An object of the present invention is to provide a parking brake device for a two-wheeled vehicle, which can prevent vibration of the vehicle and knitting of a brake pad.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a disk rotor mounted on one end surface in the width direction of a wheel boss portion of a wheel and a hydraulic caliper disposed around the disk rotor. A parking brake device provided on a motorcycle including a hydraulic disc brake configured to include a drum brake configured by disposing an expandable brake shoe on the inner periphery of the wheel boss portion as a brake drum. It is characterized by.

According to a second aspect of the present invention, there is provided a motorcycle provided with a hydraulic disk brake including a disk rotor attached to one widthwise end surface of a wheel boss portion of a wheel and a hydraulic caliper disposed around the disk rotor. A parking brake device provided with a mechanical caliper for mechanically holding a disk rotor of the hydraulic caliper.

Therefore, according to the first aspect of the present invention, the existing wheel boss portion is used as the brake drum of the mechanical drum brake provided separately from the hydraulic disc brake. The expected parking function can be secured stably without inviting,
There is no need to integrally incorporate a mechanical brake into the caliper of a hydraulic disc brake as in the prior art, so that the caliper does not increase in size and weight to increase the cost and the appearance, and the center of gravity of the Is not disadvantageous to vibrations due to the bias, and there is no problem such as knitting wear of the brake pads.

According to the second aspect of the present invention, the parking brake device is constituted by the disk rotor, which is one of the components of the hydraulic disk brake, and the mechanical caliper that sandwiches the disk rotor. The desired parking function can be secured stably without causing the size and size of the caliper, and there is no need to integrate the mechanical brake into the caliper of the hydraulic disc brake as in the past. In addition, the weight and weight increase do not cause an increase in cost and appearance, and the bias of the center of gravity of the caliper does not adversely affect vibration and does not cause problems such as wear of the brake pad by knitting. .

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

<First Embodiment> FIG. 1 is a side view of a scooter type motorcycle, and FIG. 2 is a sectional view of a rear wheel portion of the motorcycle.

In the scooter-type motorcycle 1 shown in FIG. 1, a head pipe 2 is located at an upper front part of the vehicle body, and a steering shaft 3 is rotatably inserted into the head pipe 2. A steering wheel 4 is attached to an upper end of the steering shaft 3, and a front fork 5 is attached to a lower end of the steering shaft 3. A front wheel 6 is attached to a lower end of the front fork 5. It is rotatably supported by. The hub of the front wheel 6 has a disk rotor 8 of a hydraulic disk brake that is operated by hydraulic pressure.
Is attached.

From above and below the head pipe 2, a main pipe 9 and a down tube 10 extend obliquely downward toward the rear of the vehicle body, and are bent to extend obliquely upward toward the rear of the vehicle body. The ends are connected by lugs 11. A seat rail frame 12 extends from the lug 11 toward the rear of the vehicle body.

On the other hand, reference numeral 13 denotes a tandem-type seat disposed behind the steering wheel 4. Below the seat 13, a unit swing type engine 14 as a power unit is provided. This unit swing type engine 14
Is constituted by integrating an engine 15 as a drive source and a transmission case 16 including a V-belt type automatic transmission and a power transmission mechanism (not shown). A rear wheel 17 is rotatably supported by a rear axle 18 at the rear end.

The unit swing type engine 14
The lug 1 has a front upper part via a link member 19.
1 is swingably supported by the rear wheel 1
7 together with the seat rail frame 12 via a rear cushion 20.

In FIG. 1, reference numeral 21 denotes a fuel tank, 2
Reference numeral 2 denotes a rear carrier, 23 denotes a backrest, and the periphery of the vehicle body is covered by a vehicle body cover 24 made of resin.

As shown in FIG. 2, the rear axle 18 is rotatably supported on a transmission case 16 of the unit swing type engine 14 by a bearing 25, and the rear wheel 17 is mounted on the rear axle 18. Have been.

The boss 26 of the wheel 26 of the rear wheel 17
A is formed in a drum shape, and a ring-shaped disk rotor 27 is attached to one end surface in the width direction by a plurality of bolts 28. The disk rotor 27
A caliper (not shown) sandwiching the disk rotor 27 with a brake pad (not shown) operated by hydraulic pressure constitutes a hydraulic disk brake.

The wheel boss 26A of the rear wheel 17
A large diameter portion 26A-1 formed substantially at the center in the width direction forms a brake drum, and two expandable brake shoes 29 are provided inside the large diameter portion 26A-1 constituting the brake drum. And these constitute a mechanical drum brake 30. In addition, drum brake 3
At 0, a cam (not shown) is driven by rotating a lever 31 by operating a brake lever (not shown), whereby the two brake shoes 29 are opened in a radial direction, and a wheel boss 26A as a brake drum is opened. Of the large diameter portion 26A-1. Therefore, if the brake lever is locked in the operating state, the rotation of the rear wheel 17 is locked, and the drum brake 30 functions as a parking brake.

The small diameter portion 26 of the wheel boss portion 26A of the rear wheel 17 on the side where the disk rotor 27 is mounted.
A sensor ring 32 having a gear tooth surface engraved on the inner peripheral portion is fitted on the inner peripheral surface of A-2. Near the sensor ring 32, the rotation speed of the rear wheel 17 is optically measured. A wheel sensor 33 for detection is fixed. The rotation speed detected by the wheel sensor 33 is used for controlling brake hydraulic pressure in an antilock brake system (ABS).

As described above, in the present embodiment,
Since the existing wheel boss portion 26A is used as a brake drum of the mechanical drum brake 30 provided separately from the hydraulic disc brake, the intended parking function is stably secured without incurring a complicated structure and an increase in size. be able to. Therefore, there is no need to integrally incorporate a mechanical brake into the caliper of the hydraulic disc brake unlike the conventional case, and the caliper does not increase in size and weight, thereby increasing costs and reducing appearance. The center of gravity of the brake pad is not biased, so that there is no disadvantage to vibration, and no problems such as abrasion of the brake pad occur.

Further, since the sensor ring 32 and the wheel sensor 33 are separated from the brake shoe 29 by the wall portion 26a of the wheel 26, the abrasion powder of the brake shoe 29 is prevented from adhering to the sensor ring 32 and the wheel sensor 33. Can come off.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a sectional view of a rear wheel portion of a motorcycle showing a configuration of a parking brake device according to a second embodiment of the present invention. In this figure, the same elements as those shown in FIG. In the following, description thereof will be omitted.

The parking brake device according to this embodiment has a small diameter portion 26A of the wheel boss portion 26A of the rear wheel 17.
-2 is used as a brake drum of a drum brake 30, and a brake shoe 29 is arranged inside the brake drum. A sensor ring 32 and a wheel sensor 33 are arranged on the opposite side of the brake shoe 29 with a wall portion 26a of the wheel 26 interposed therebetween.

In the present embodiment, the existing wheel boss 26A is used as the brake drum of the mechanical drum brake 30 provided separately from the hydraulic disc brake. The effect is obtained.

Since the sensor ring 32 and the wheel sensor 33 are separated from the brake shoe 29 by the wall portion 26a of the wheel 26, the abrasion powder of the brake shoe 29 is prevented from adhering to the sensor ring 32 and the wheel sensor 33. Can come off.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 4 is an exploded perspective view of a parking brake device according to Embodiment 3 of the present invention, and FIG. 5 is a side view of the parking brake device.

The parking brake device according to the present embodiment comprises a disk rotor 27 of a hydraulic disk brake and a mechanical caliper 35 for mechanically holding the disk rotor 27. The mechanical caliper 35 has a central portion. It has a pair of arms 38 and 39 pivotally attached to a stopper 37 by bolts 36, and the stopper 37 is attached to a transmission case of a unit swing type engine (not shown).

The arms 38 and 39 are urged to the open side by a torsion coil spring 40. The open angle of the arms 38 and 39 is such that one end of each of these ends is a corner 37a of the stopper 37.
(See FIG. 5).

That is, as shown in FIG.
A circular hole 38a (only one is shown in FIG. 4)
Are bored, and a collar 41 is inserted into these circular holes 38a.
The torsion coil spring 40 is wound around the outer periphery of the collar 41. And the torsion coil spring 40
Are bent into an L-shape, and these are arms 38,
39 are engaged with circular holes 38b and 39b, respectively.

The collar 41 is provided with the bolt 3
6 is inserted, and the bolt 36 is screwed to a nut member 42 attached to the back surface of the stopper 37, whereby a pair of arms 38 and 39 are pivotally attached to the stopper 37 so as to be rotatable. The arms 38, 39 are urged to the open side by a torsion coil spring 40.

By the way, brake shoes 43 are respectively attached to opposing surfaces of one ends of the arms 38 and 39, and a notch 39c for inserting a brake wire 44 is provided at the other end of one arm 39. The other end of the other arm 38 is formed in a forked shape, and a circular hole 38c for fitting and holding the columnar piece 45 is formed in this portion.

On the other hand, a screw member 46 is attached to the end of the brake wire 44, and the screw member 46 is attached to the top 45 fitted and held in a circular hole 38c formed in the end of the arm 38. It is passed through a circular hole 45a penetrated, and is attached to an end of the arm 38 so as to be adjustable in length by a nut 47 screwed to the end.

In the mechanical caliper 35 having the above configuration, when the arm is not operated, as shown in FIG.
39 is open, and the rear wheel and the disc rotor 27 can rotate freely.

During parking of the motorcycle, a brake lever (not shown) is operated to operate the brake wire 44.
, The arms 38, 39 of the mechanical caliper 35
Are closed against the biasing force of the torsion coil spring 40, and these clamp the both surfaces of the disk rotor 27 via the brake shoes 43 to lock the rotation of the disk rotor 27 and the rear wheel. Functions as a brake.

As described above, the parking brake device according to the present embodiment uses the disk rotor 27 which is one of the components of the hydraulic disk brake, and is constituted by the mechanical caliper 35 which clamps the disk rotor 27. Therefore, the desired parking function can be stably ensured without causing the structure to be complicated or large. Therefore, there is no need to integrally incorporate a mechanical brake into the caliper of the hydraulic disc brake unlike the conventional case, and the caliper does not increase in size and weight, thereby increasing costs and reducing appearance. The center of gravity of the brake pad is not biased, so that there is no disadvantage to vibration, and no problems such as abrasion of the brake pad occur.

[0038]

As is apparent from the above description, claim 1
According to the described invention, the existing wheel boss portion is used as the brake drum of the mechanical drum brake provided separately from the hydraulic disc brake, so that the intended parking function can be achieved without complicating the structure and increasing the size. , And it is not necessary to integrate a mechanical brake into the caliper of the hydraulic disc brake as in the past, and the caliper becomes larger and heavier, resulting in increased cost and reduced appearance. In addition, there is no disadvantage due to vibration due to the bias of the center of gravity of the caliper, and no problems such as abrasion of the brake pad occur.

According to the second aspect of the present invention, the parking brake device is constituted by the disk rotor, which is one of the components of the hydraulic disk brake, and the mechanical caliper that sandwiches the disk rotor. The desired parking function can be secured stably without causing the size and size of the caliper, and there is no need to integrate the mechanical brake into the caliper of the hydraulic disc brake as in the past. In addition, the weight and weight increase do not cause an increase in cost and appearance, and the bias of the center of gravity of the caliper does not adversely affect vibration and does not cause problems such as wear of the brake pad by knitting. .

[Brief description of the drawings]

FIG. 1 is a side view of a scooter type motorcycle.

FIG. 2 is a cross-sectional view of a rear wheel portion of the scooter-type motorcycle showing a configuration of the parking brake device according to Embodiment 1 of the present invention.

FIG. 3 is a sectional view of a rear wheel portion of a scooter-type motorcycle showing a configuration of a parking brake device according to a second embodiment of the present invention.

FIG. 4 is an exploded perspective view of a parking brake device according to Embodiment 3 of the present invention.

FIG. 5 is a side view of a parking brake device according to Embodiment 3 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Scooter type motorcycle (motorcycle) 17 Rear wheel (wheel) 26 Wheel 26A Wheel boss part 27 Disk rotor 29 Brake shoe 30 Drum brake 35 Mechanical caliper

Claims (2)

[Claims] 1. A parking brake device provided in a two-wheeled vehicle provided with a hydraulic disk brake including a disk rotor attached to one widthwise end surface of a wheel boss portion of a wheel and a hydraulic caliper disposed around the disk rotor. A parking brake device for a two-wheeled vehicle, comprising a drum brake having the wheel boss portion as a brake drum and an expandable brake shoe disposed on the inner periphery thereof. 2. A parking brake device provided in a motorcycle provided with a hydraulic disk brake including a disk rotor mounted on one end surface in the width direction of a wheel boss portion of a wheel and a hydraulic caliper disposed around the disk rotor. A parking brake device for a motorcycle, comprising a mechanical caliper for mechanically holding a disk rotor of the hydraulic caliper.