JP4298811B2 - Anti-lock brake device for scooter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antilock brake device for a scooter.
[0002]
[Prior art]
Conventionally, as an anti-lock brake device mounted on a vehicle, there is one provided with a hydraulic control device interposed in a hydraulic system of a hydraulic brake and an electronic control device that sends a control signal to the hydraulic control device.
[0003]
The hydraulic control device includes a rotary hydraulic pump driven by a motor and an electromagnetic valve that switches an oil passage on the downstream side of the hydraulic pump between a brake caliper side and a bypass side. The electronic control unit is configured to send a control signal to the electromagnetic valve when the rotation of the wheel is stopped during braking, and at this time, the hydraulic pressure transmitted to the brake caliper side is decreased for a moment and then increased. .
[0004]
[Problems to be solved by the invention]
The inventors consider mounting an antilock brake device configured as described above on a scooter.
However, there are the following two problems to realize this.
The first problem is that the hydraulic control device including the motor and the hydraulic pump is heavy, and the center of gravity of the vehicle body becomes high depending on the mounting position of the hydraulic control device.
The second problem is that a motor or a hydraulic pump of the hydraulic control device vibrates during operation. In other words, when this vibration is transmitted to the vehicle body frame, there may be a phenomenon in which the vehicle body shakes as well as discomforting the occupant. In addition, since vibration is transmitted to the brake oil pipe connected to the hydraulic control device, the vibration is also transmitted to the vehicle body frame via the pipe. By constituting this pipe with a rubber hose, the transmitted vibration can be reduced. However, since it is desirable to use a pipe made of steel pipe so that the hydraulic loss is reduced, vibration transmission must be reduced in a state where the pipe made of steel pipe is connected to the hydraulic control device.
[0005]
The present invention has been made to solve such problems, and an object of the present invention is to provide an antilock brake device for a scooter that can reduce the center of gravity of a vehicle body and that has low vibration transmitted to the vehicle body. To do.
[0006]
[Means for Solving the Problems]
In order to achieve this object, an antilock brake device for a scooter according to the present invention elastically supports a hydraulic control device on a vehicle body frame below a footrest plate, and a steel pipe brake oil pipe is attached to the hydraulic control device. The motor and the hydraulic pump of the hydraulic control device are positioned so that the axis is oriented in the vehicle width direction, and the portion in the vicinity of the hydraulic control device in the brake oil pipe is piped so as to extend parallel to the vehicle width direction. Is.
[0007]
According to the present invention, the hydraulic control device is mounted at the lowest position in the vehicle body. Further, vibration transmitted from the hydraulic control device to the vehicle body frame is damped by an elastic body that supports the hydraulic control device. In addition, since the hydraulic control device vibrates in a direction orthogonal to the vehicle width direction, even if the vibration of the hydraulic control device is transmitted to the vehicle body frame, the steering is not affected. Furthermore, when the hydraulic control device vibrates in the direction perpendicular to the vehicle width direction, the steel pipe brake oil pipe connected to the hydraulic control device is elastically deformed so that it swings with the hydraulic control device side as the swing end. To do. As the pipe is elastically deformed in this way, vibration transmitted from the hydraulic control device to the vehicle body frame via the pipe is attenuated.
[0008]
An antilock brake device for a scooter according to another invention is the antilock brake device for a scooter according to the above-described invention, wherein a battery for supplying power to the hydraulic control device is disposed below the footrest plate.
According to the present invention, the battery is disposed in the vicinity of the hydraulic control device, and the cable connecting them can be relatively shortened.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an antilock brake device for a scooter according to the present invention will be described in detail with reference to FIGS.
FIG. 1 is a side view of a scooter equipped with an anti-lock brake device according to the present invention, FIG. 2 is a plan view showing a configuration of a vehicle body frame, FIG. 3 is an enlarged plan view showing a hydraulic control device, and FIG. FIG. 5 is a cross-sectional view taken along the line V-V of the hub portion of the rear wheel in FIG. 1.
[0010]
In these drawings, what is denoted by reference numeral 1 is a scooter according to this embodiment. The scooter 1 includes a low-floor footrest plate 4 between the steering handle 2 and the seat 3, and a luggage storage box 5 and a unit swing type engine 6 are mounted below the seat 3.
[0011]
The steering handle 2 is supported by a head pipe 8 of a vehicle body frame 7 described later together with a front fork 9 so as to be rotatable. The front fork 9 is a conventionally known telescopic type, and a front wheel 10 is rotatably attached to a lower end portion.
The seat 3 has a structure in which a driver and a passenger can be seated, and is supported on the vehicle body frame 7 via a bracket (not shown) so that the rear side of the vehicle body rotates in the vertical direction with the front end as a fulcrum. I am letting.
[0012]
The luggage storage box 5 is formed so as to open upward and is supported by the body frame 7, and the upper opening is opened and closed by the seat 3. The scooter 1 includes a vehicle body cover 11 that covers parts below the vehicle body frame 7 and the seat 3 in the same manner as a conventional scooter. The footrest plate 4 is formed integrally with the vehicle body cover 11.
[0013]
The vehicle body frame 7 includes two types of down tubes 12 to 15 extending from the head pipe 8 to the rear side of the vehicle body, and a rear frame connected to the rear ends of these down tubes 12 to 15 via an engine mount bracket 16. 17.
[0014]
The two types of down tubes 12 to 15 are formed so as to make a pair in the vehicle width direction, and the down tubes 12 and 13 positioned relatively below are the upper down tubes as shown in FIG. 14 and 15 extend in the front-rear direction outside the vehicle width direction. The footrest plate 4 is formed so as to cover these four down tubes 12 to 15 from above.
[0015]
The engine mounting brackets 16 are also formed so as to form a pair in the vehicle width direction, and are connected to each other by a cross member (not shown).
As shown in FIGS. 1 and 2, the rear frame 17 is provided on a lower pipe 18 that is formed in a lateral U shape that opens toward the front of the vehicle body in plan view, and on the lower pipe 18. The upper pipe 19 is constituted. The upper pipe 19 is formed to make a pair in the vehicle width direction, and extends from the upper end of the engine mount bracket 16 to the rear end of the lower pipe 18 so as to overlap the lower pipe 18 in plan view. Has been established.
[0016]
The unit swing type engine 6 is swingably supported by the engine mount bracket 16 via a link mechanism (not shown) so that the rear part swings in the vertical direction. The engine 6 includes a transmission case body 21 (see FIG. 5) integrally formed at the left end of the crankcase 6a. The transmission case body 21 extends to the rear side of the vehicle body. The rear wheel 23 is rotatably supported by a support bracket 22 (see FIG. 5) attached to the right side of the vehicle body of the crankcase 6a. Further, a cushion unit 24 is interposed between the rear end portion of the transmission case main body 21 and the rear end portion of the support bracket 22 and the vehicle body frame 7 as shown in FIG.
[0017]
As shown in FIG. 5, the rear wheel 23 includes a hub 26 integrally formed with a rim 25, an axle 27 coupled to the hub 26 by spline fitting, and a tire 28 attached to the hub 26 (FIG. 1). Reference). The hub 26 can be removed from the axle 27 to the right side of the vehicle body during maintenance.
[0018]
The axle 27 is rotatably supported by the transmission case main body 21 and the support bracket 22 via bearings 29 and 30. This axle 27 is connected to a gear type reduction gear (not shown) at the left end of the vehicle body, and, like a conventionally known unit swing type engine, the gear type reduction gear, a centrifugal clutch (not shown), and a V It is connected to the crankshaft of the engine 6 via a belt type automatic transmission (not shown). These gear type reduction gears, centrifugal clutches and V-belt type automatic transmissions are arranged in a space formed by a transmission case body 21 and a transmission case cover 31 attached to the left side of the transmission case body 21 in the vehicle body. Yes. In addition, what is shown with the code | symbol 32 located in the outer side of the transmission case cover 31 in FIG. 5 is an outer cover which covers the transmission case cover 31 from the outer side.
[0019]
The scooter 1 employs a hydraulic antilock brake device as a brake device for the front wheel 10 and the rear wheel 23. As shown in FIGS. 1 and 2, the anti-lock brake device includes an electronic control device 33 disposed at the rear portion of the vehicle body and a wheel speed sensor for detecting whether the front wheel 10 or the rear wheel 23 is locked. 34, 35 and a hydraulic control device 36 disposed below the footrest plate 4.
[0020]
As shown in FIGS. 1 and 2, the electronic control device 33 is arranged at the rear of the vehicle body and below the seat 3, the rear end portion of the rear frame 17, and the rear of the seat 3. A hydraulic control device, which will be described later when the front wheel 10 or the rear wheel 23 is locked at the time of braking, is disposed at a portion surrounded by the vehicle body cover 11 and is supported on the rear frame 17 via a bracket (not shown). 36 is configured to send a control signal. Whether the front wheel 10 or the rear wheel 23 is locked is detected by wheel speed sensors 34 and 35 provided on the front wheel side and the rear wheel side, respectively. As shown in FIGS. 1 and 2, the electronic control device 33 and the hydraulic control device 36 are arranged below the footrest plate 4 and supported by a relatively low down tube 13 on the right side of the vehicle body. Power is supplied from 37.
[0021]
The wheel speed sensors 34 and 35 are constituted by electromagnetic pickups and are supported by members that do not rotate in the vicinity of the hub 38 of the front wheel 10 and the hub 26 of the rear wheel 23. The detection unit faces the gear teeth. The mounting structure of the wheel speed sensors 34 and 35 will be described with reference to FIG. 5, taking the rear wheel side as an example.
[0022]
The rear wheel side wheel speed sensor 35 shown in FIG. 5 has a flange 39 formed on the rear wheel side of the transmission case main body 21 and an axis line parallel to the axis line of the axle 27 and a rod-like detection part 35a at the tip. It penetrates so as to protrude from the flange 39 to the right side of the vehicle body, and is fixed by a fixing bolt (not shown). The flange 39 is formed in a circular shape so as to be positioned on the same axis as the axle 27, and a wheel speed sensor 35 is attached to a portion exposed from the outer cover 32 as shown in FIG.
[0023]
In this embodiment, as shown in FIG. 1, the lower half of the wheel speed sensor 35 is covered by the outer cover 32 as viewed from the left side of the vehicle body. By adopting such a configuration, even if the wheel speed sensor 35 is provided, the appearance of the vehicle body is not impaired, and it is possible to prevent the wheel speed sensor 35 from being damaged by a third party.
[0024]
The hub 26 of the rear wheel 23 is provided with a bottomed cylinder 41 that forms an annular space 40 between the flange 39 and an internal gear 42 that is detected by the detection unit 35a. It is fixed to the inner periphery. The detection part 35a faces the tooth tip so as to face the inside of the internal gear 42 in the radial direction.
[0025]
Further, the outer peripheral portion of the flange 39 and the opening edge portion of the bottomed cylinder 41 are formed in a shape that constitutes a labyrinth seal therebetween. The labyrinth seal is indicated by reference numeral 43 in FIG.
[0026]
Thus, by attaching the wheel speed sensor 35 to the flange 39 of the transmission case main body 21, the rotation of the rear wheel 23 can be detected by the wheel speed sensor 35. Similarly to the rear wheel side, the wheel speed sensor 34 on the front wheel side is positioned so that the axis is directed in the vehicle width direction, and a detection unit is provided inside the radial direction of an internal gear (not shown) that rotates with the hub 38. I ’m here.
[0027]
The hydraulic control device 36 is interposed in a hydraulic system between hydraulic disc brakes 44 and 45 provided on the right side of the front wheels 10 and the rear wheels 23 and a master cylinder on the steering handle 2 side. A brake disc of the front wheel side disc brake 44 is indicated by reference numeral 44a in FIG. The brake disc of the rear wheel side disc brake 45 is indicated by reference numeral 45a in FIG. 5, and the brake caliper is indicated by reference numeral 45b in FIGS. The brake disks 44a and 45a are attached to the hubs 38 and 26 of the front wheel 10 and the rear wheel 23, the brake caliper 44b on the front wheel side is attached to the front fork 9, and the brake caliper 45b on the rear wheel side is attached to the support bracket 22. It is installed.
[0028]
Further, as shown in FIGS. 3 and 4, the hydraulic control device 36 has a structure in which a motor 46 and a rotary hydraulic pump 47 driven by the motor 46 are integrally combined. Of the four down tubes 12 to 15 of the body frame 7, two cross members 48, 49 made of steel plates are disposed on the lower two down tubes 12, 13 below the footrest plate 4. And elastically supported via two brackets 50 and 51 and a cushion rubber 52.
[0029]
The two brackets 50 and 51 are formed so as to extend in the front-rear direction of the vehicle body, and the front end portion and the rear end portion are fixed to the cross members 48 and 49 by fixing bolts 53. Of these brackets 50, 51, the bracket 50 on the left side of the vehicle body elastically supports the end of the hydraulic pump 47 on the left side of the vehicle body via two cushion rubbers 52. The bracket 51 on the right side of the vehicle body elastically supports the end portion on the right side of the vehicle body of the hydraulic pump 47 via one cushion rubber 52.
[0030]
The motor 46 and the hydraulic pump 47 are disposed in the center in the vehicle width direction and are positioned so that the axis is directed in the vehicle width direction. In FIG. 4, the reference numeral 54 provided on the side of the hydraulic pump is an igniter of the ignition device.
[0031]
The hydraulic pump 47 has a conventionally known structure that applies hydraulic pressure to the hydraulic system of the front wheel side disc brake 44 and the hydraulic system of the rear wheel side disc brake 45, respectively, and an electromagnetic for increasing or decreasing the hydraulic pressure of these hydraulic systems. A valve (not shown) is incorporated. This solenoid valve is switched on and off by a control signal sent from the electronic control unit 33. This anti-lock brake device employs a configuration in which when the front wheel 10 or the rear wheel 23 is locked during braking, the electromagnetic valve is operated and the hydraulic pressure of the hydraulic system is decreased for a moment and then increased.
[0032]
The hydraulic system of the front wheel side disc brake 44 and the hydraulic system of the rear wheel side disc brake 45 are made of steel pipe so that the hydraulic loss is as small as possible between the master cylinder on the steering handle 2 side and the hydraulic pump 47. A brake oil pipe (hereinafter simply referred to as a brake pipe) is installed. Note that the hydraulic system of the front wheel side disc brake 44 is also provided with a steel pipe brake pipe in the middle between the hydraulic pump 47 and the brake caliper 44b. Here, the configuration of the hydraulic piping will be described in more detail.
[0033]
As shown in FIG. 1, the head cylinder brake head cylinder (not shown) provided on the right side of the steering wheel 2 in the hydraulic system of the front wheel side disc brake 44 is connected to the hydraulic pump 47 from the master cylinder to the head. The brake hose 55 extends downward to the vicinity of the lower end of the pipe 8 and a brake pipe 56 extending from the lower end of the brake hose 55 to the hydraulic pump 47. Between the hydraulic pump 47 and the front wheel side brake caliper 44b, the hydraulic pump 47, a brake hose 57 extending from the front end of the brake pipe 58 to the vicinity of the lower end of the head pipe 8, and a brake caliper from the front end of the brake pipe 58. The brake hose 59 extends to 44b. It is.
[0034]
On the other hand, between the rear wheel brake master cylinder 60 provided on the left side of the steering wheel 2 in the hydraulic system of the rear wheel disc brake 45 and the hydraulic pump 47, the master cylinder 60 and the vicinity of the lower end of the head pipe 8 are disposed. And a brake pipe 62 extending from the lower end of the brake hose 61 to the hydraulic pump 47, and a brake hose 63 is formed between the hydraulic pump 47 and the rear wheel side caliper 45b.
[0035]
The brake hoses 55, 57, 59, 61, 63 are made of rubber having high pressure resistance and oil resistance. In this embodiment, the above-described three brake pipes 56, 58, 62 are piped along the down tube 14 that is positioned relatively on the left side of the vehicle body on the left side of the four down tubes 12-15. The rear side of the vehicle body is fixed to the down tube 14 with a holder 64, and the front side of the vehicle body is fixed to the lower down tube 12 with a holder 65.
[0036]
Of these brake pipes, two brake pipes 56 and 62 on the input side directly connected to the hydraulic pump 47 have portions in the vicinity of the hydraulic pump 47 parallel to the vehicle width direction, as shown in FIGS. The piping is extended. In this embodiment, a portion extending in the vertical direction is provided in the middle of the portion extending in the vehicle width direction. More specifically, these brake pipes 56, 62, first horizontal extending portions 56a, 62a extending from the hydraulic pump 47 to above the motor 46 on the left side of the vehicle body, and the first horizontal extending portions 56a, Vertically extending portions 56b and 62b extending upward from the tip of 62a to the same height as the upper downtube 14, and the left side of the vehicle body from the upper ends of the vertically extending portions 56b and 62b to above the upper downtube 14 The second horizontal extending portions 56c, 62c extending in the forward direction and the front and rear extending portions 56d, 62d extending from the front ends of the second horizontal extending portions 56c, 62c toward the front of the vehicle body. The direction extending portions 56d and 62d are fixed to the down tubes 14 and 12 by the holders 64 and 65, respectively. By piping the brake pipes 56 and 62 in this manner, three bent portions that are bent at substantially right angles are formed in the vicinity of the hydraulic pump 47 in the brake pipes 56 and 62.
[0037]
Since the anti-lock brake device configured as described above includes the motor 46 and the hydraulic pump 47, the hydraulic control device 36, which increases in weight, is disposed below the footrest plate 4, and thus the lowest position in the vehicle body. The hydraulic control device 36 is mounted on the Therefore, the center of gravity of the vehicle body is lowered despite the anti-lock brake device being equipped.
[0038]
Further, since the hydraulic control device 36 is elastically supported by the vehicle body frame 7 via the cushion rubber 52, vibration transmitted from the hydraulic control device 36 to the vehicle body frame 7 can be attenuated by the cushion rubber 52, so that vibration is suppressed. Is done.
[0039]
Further, since the motor 46 and the hydraulic pump 47 of the hydraulic control device 36 are positioned so that the axis is directed in the vehicle width direction, the hydraulic control device 36 vibrates in a direction orthogonal to the vehicle width direction. Is transmitted to the vehicle body frame 7, the steering is not affected. Furthermore, since the portions near the hydraulic control device 36 in the brake pipes 56 and 62 connected to the hydraulic pump 47 are piped so as to extend parallel to the vehicle width direction, the hydraulic control device 36 vibrates in a direction perpendicular to the vehicle width direction. As a result, the brake pipes 56 and 62 are elastically deformed so as to swing with the hydraulic control device 36 side as the swing end.
[0040]
As the brake pipes 56 and 62 are elastically deformed in this way, vibration transmitted from the hydraulic control device 36 to the vehicle body frame 7 via the brake pipes 56 and 62 is attenuated. In this embodiment, the brake pipes 56 and 62 are formed with three bent portions that are bent substantially at right angles, and therefore, the brake pipes 56 and 62 are more easily deformed than when the brake pipes 56 and 62 are formed linearly. Vibrations are difficult to be transmitted.
[0041]
Since the other pipe connected to the hydraulic control device 36 is a rubber brake hose, the vibration is not transmitted to the vehicle body frame 7 via the brake hose.
[0042]
In addition, since the battery 37 for supplying power to the hydraulic control device 36 is disposed below the footrest plate 4, the battery 37 is disposed in the vicinity of the hydraulic control device 36, and a cable (not shown) is connected between them. Can be made relatively short. As a result, it is possible to relatively reduce power loss when power is supplied to the hydraulic control device 36 from the battery 37.
[0043]
In this embodiment, an annular space 40 formed between the flange 39 of the transmission case main body 21 and the bottomed cylinder 41 of the hub 26 of the rear wheel 23 is used as the detection portion 35a of the wheel speed sensor 35 on the rear wheel side. And is made to face the internal gear 42 on the hub 26 side, so that the detection portion 35a can be disposed outside the space for housing the gear type reduction gear inside the transmission case main body 21. For this reason, compared with the case where the detection unit 35a is opposed to the gear of the reduction gear, the detection unit 35a does not adhere to lubricating oil, iron powder generated from the reduction gear, and the like, so that the detection accuracy can be increased. Moreover, since the structure which detects the internal gear 42 provided in the hub 26 is taken, the internal gear 42 can be equipped using the space inside the radial direction of the rear wheel 23. As a result, the travel distance per pulse can be relatively shortened, in other words, the resolution can be increased without increasing the size of the vehicle body, compared to the case where the configuration for detecting the rotation of the speed reducer is adopted.
[0044]
The annular space 40 into which the detection portion 35a is inserted has a peripheral portion sealed to the outside by a labyrinth seal 43, so that it is difficult for foreign matter to enter and the detection accuracy can be kept high.
[0045]
Further, since the detection portion 35a of the wheel speed sensor 35 on the rear wheel side is formed in a rod shape so as to face the inner side in the radial direction of the internal gear 42, the hub 26 of the rear wheel 23 is moved from the axle 27 to the right side of the vehicle body during maintenance. Even when the internal gear 42 comes into contact with the detection unit 35a when removed, the detection unit 35a bends by its own elasticity, so that the impact transmitted to the coil in the wheel speed sensor 35 can be reduced.
[0046]
In this embodiment, the electronic control device 33 of the anti-lock brake device is disposed in a portion surrounded by the luggage storage box 5, the rear frame 17, and the vehicle body cover 11. And vibrations can be made difficult to be transmitted, and rainwater can be prevented.
[0047]
【The invention's effect】
As described above, according to the present invention, since the hydraulic control device is mounted at the lowest position in the vehicle body, it is possible to provide a scooter having a low center of gravity despite being equipped with an antilock brake device. Also, since the structure supporting the hydraulic control device prevents vibration from being transmitted from the hydraulic control device to the vehicle body frame, a scooter with low vibration is provided even though the anti-lock brake device is provided. Can do.
[0048]
Further, since the hydraulic control device vibrates in a direction orthogonal to the vehicle width direction, even if the vibration of the hydraulic control device is transmitted to the vehicle body frame, the steering is not affected. Furthermore, when the hydraulic control device vibrates in a direction perpendicular to the vehicle width direction, the steel pipe brake oil pipe connected to the hydraulic control device is elastically deformed so as to swing with the hydraulic control device side as a swing end. To do. As the pipe is elastically deformed in this way, vibration transmitted from the hydraulic control device to the vehicle body frame via the pipe is attenuated. For this reason, it is possible to suppress the transmission of the vibration to the vehicle body frame through this pipe while realizing an anti-lock brake device with good responsiveness by using a steel pipe brake oil pipe that reduces hydraulic loss. Can do.
[0049]
According to another invention in which a battery for supplying power to the hydraulic control device is disposed below the footrest plate, the battery is disposed in the vicinity of the hydraulic control device, and the cable connecting both of them can be made relatively short. As a result, the power loss when power is supplied to the hydraulic control device from the battery is relatively small.
[Brief description of the drawings]
FIG. 1 is a side view of a scooter equipped with an antilock brake device according to the present invention.
FIG. 2 is a plan view showing a configuration of a vehicle body frame.
FIG. 3 is an enlarged plan view showing a hydraulic control device.
FIG. 4 is a perspective view showing a support structure of the hydraulic control device.
5 is a cross-sectional view taken along the line VV of the hub portion of the rear wheel in FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Scooter, 4 ... Foot plate, 7 ... Body frame, 12-15 ... Down tube, 36 ... Hydraulic control device, 37 ... Battery, 46 ... Motor, 47 ... Hydraulic pump, 56, 62 ... Brake pipe.

Claims (2)

An antilock brake device for a scooter equipped with a hydraulic control device for changing the hydraulic pressure of a hydraulic brake by a rotary hydraulic pump driven by a motor and an electromagnetic valve interposed in the hydraulic system. A steel pipe brake oil pipe is connected to the hydraulic control device, and is arranged below the plate and elastically supported by the vehicle body frame. The axis of the motor and hydraulic pump of the hydraulic control device points in the vehicle width direction. An antilock brake device for a scooter, wherein a portion of the brake oil pipe in the vicinity of the hydraulic control device is piped so as to extend in parallel with the vehicle width direction. 2. The antilock brake device for a scooter according to claim 1, wherein a battery for supplying power to the hydraulic control device is disposed below the footrest plate.

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