JP2001219829A - Vehicle braking system - Google Patents

Abstract

(57) [Problem] To eliminate spontaneous movement of a vehicle having a centrifugal clutch that can be driven and driven when the rotation of an engine is reduced. A braking device is provided in a vehicle that travels through a centrifugal clutch that is turned on and off by the rotation of an engine to apply a brake by releasing an accelerator pedal that operates the rotation of the engine. Configuration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking device for a vehicle, and is used for a vehicle that is driven and driven via a centrifugal clutch, and is suitably used for a relatively lightweight riding cart, transport vehicle, or the like.

[0002]

2. Description of the Related Art In a vehicle that is driven by automatically turning on a centrifugal clutch by rotation of an engine, a brake pedal is provided independently of an accelerator pedal, and braking is performed by depressing the brake pedal.

[0003]

In the transmission mode in which the transmission is automatically transmitted via such a centrifugal clutch, the centrifugal clutch is disengaged when the rotation of the engine is reduced or stopped, and the engine brake is not effective on a slope or the like. It is often dangerous to move without it.

[0004]

The present invention employs the following technical means in order to solve such a defect.
That is, according to the first aspect of the present invention, in a vehicle that is driven by a centrifugal clutch 2 that is turned on and off by the rotation of the engine 1, the brake 4 is applied by releasing the accelerator pedal 3 that operates the rotation of the engine 1. The configuration of the braking device is characterized in that: The invention described in claim 2 is characterized in that the accelerator pedal 3 and the brake pedal 4 are connected by a wire 5. According to a third aspect of the present invention, in the centrifugal clutch 2, the centrifugal mechanism 37 uses a split V of the belt continuously variable transmission 11.
The transmission is turned on and off by moving the pulley 27.

[0005]

According to the first aspect of the present invention, when the accelerator pedal 3 is depressed, the engine 1 is turned on.
The transmission of the centrifugal clutch 2 is automatically performed by increasing the rotation of the motor and the vehicle travels. When the accelerator pedal 3 is released during this running, the rotation of the engine 1 is reduced and
The brake 4 is actuated to stop running automatically. Therefore, when the centrifugal clutch 2 is in the power-off state, the brake 4
Is braked, and the brake 4 can be properly applied without stepping on the brake pedal 3, and the operability can be simplified and facilitated. According to the second aspect of the present invention, since the accelerator pedal 3 and the brake 4 are connected by the wire 5, the configuration is simple and the braking is reliably performed. Claim 3
In the invention described in the above, the split V-pulley 27 of the belt continuously variable transmission 11 is moved by the centrifugal mechanism 37 constituting the centrifugal clutch 2 so that the transmission is turned on and off. The structure can be simplified by being shared as one component of the clutch 2, and smooth transmission can be performed by integration with the belt continuously variable transmission 11.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is used for a vehicle that is driven and driven via a centrifugal clutch, and can be suitably applied to a riding cart, a transport vehicle, and the like. Therefore, the invention according to claim 1 is characterized in that, in a vehicle that is transmitted and driven through a centrifugal clutch that is turned on and off by the rotation of the engine, the brake is applied by releasing the accelerator pedal that operates the rotation of the engine. When the accelerator is depressed from the accelerator pedal, the brake is automatically braked, and the brake can be applied accurately, so that the operability can be simplified and facilitated.

Here, the interlocking of the accelerator pedal and the brake can be in a form that can be transmitted electromagnetically, electronically, mechanically, or via a hydraulic circuit or the like. The transmission path from the engine to the transmission case can use a belt continuously variable transmission. In this case, the belt continuously variable transmission can be automatically increased in speed according to the rotation of the engine. The centrifugal clutch can be provided on the entry side (engine side) of the belt continuously variable transmission, but it can be provided on the output side (transmission case side). The invention according to claim 2 is characterized in that the accelerator pedal and the brake are linked by a wire, and the braking is reliably performed with a simple configuration. Furthermore, the invention according to claim 3 is characterized in that the centrifugal clutch moves the split V-pulley of the belt continuously variable transmission by a centrifugal mechanism to turn on and off the transmission. Is a split V-pulley of a belt continuously variable transmission, which simplifies the configuration and allows smooth transmission.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. For example, the transport cart 6 has a front wheel 8 and a rear wheel 9 that can be steered by a handle 7, and the rear wheel 9 is disposed under the hood 10, such as the engine 1 and the belt continuously variable transmission 11. And a four-wheel traveling mode in which the vehicle travels through the vehicle. An accelerator pedal 3, a brake pedal 14, and the like are arranged on a floor 13 in front of the driver's seat 12.

The accelerator pedal 3 is rotatably provided below a floor 13 around a pedal shaft 15 against a spring 16. A wire 18 is connected to an upper end of a rotating arm 17 integrated with the accelerator pedal 13 to link a control rack (not shown) for supplying fuel for the engine 1. The wire 5 is connected to the lower end of the rotating arm 17 to interlock the brake 4 that brakes the brake drum 21 integrated with the input shaft 20 of the transmission case 19. In the brake 4, a brake arm 22 is rotatably provided around an arm shaft 23 of a transmission case 19, and a brake shoe 24 integrated with the brake arm 22 is pressed against the rotating peripheral surface of the brake drum 21.
It is possible to brake the input shaft 20 or the rear wheel 9 linked thereto. The wire 5 is connected to the brake arm 22
And is rotated against the spring 25 for braking.

The belt continuously variable transmission 11 is provided between a drive shaft 26 driven via the centrifugal clutch 2 on the engine 1 side and an input shaft 20 on the transmission case 19. A V-belt 29 is stretched between the split V-pulley 27 on the drive shaft 26 and the split V-pulley 28 on the input shaft 20, and the tension pulley 31 of the tension arm 30 is pressed by a spring 32 to transmit power. Is done.

The centrifugal clutch 2 moves the centrifugal weight 38 in and out along the inclined guide body 39, and
Has a centrifugal mechanism 37 for moving the V-shaped pulley 27 in the axial direction, and the movable body 40 can press and move the split V-pulley 27 in the axial direction. When the rotation of the drive shaft 26 is low, the rotation diameter of the V-belt 29 is small, and the V-belt 29 cannot be rotated. However, when the rotation of the drive shaft 26 is increased, the centrifugal mechanism 37 is rotated. Moving body 40 by action
As a result, the V-pulley 27 is moved, the rotation diameter increases, and the V-belt 29 is sandwiched to transmit the rotational force, and the centrifugal clutch 2 is engaged. When the rotation of the drive shaft 26 decreases, the V pulley 27 is pressed by the centrifugal mechanism 37 to reduce the rotation diameter.

The belt continuously variable transmission 11 is rotatable about the two V-pulleys 27 and 28.
On the fuselage side, there are ring arms 33 and 34 that are moved in the axial direction by contact with a fixed cam (not shown), and these two ring arms 33 and 34 are connected by a rod 35.
By moving the rod 35 or the ring arms 33 to 34, the rotation diameters of the two V pulleys 27 and 28 can be interlocked to change the speed continuously. The stepless speed change operation can be configured to be operated by a governor (not shown) by the rotation of the drive shaft 26 to automatically change the speed, and to interlock with the high speed change in response to an increase in the rotation of the engine 1. Further, instead of such an automatic transmission mode, a mode in which the rod 35 or the like can be operated by an operation lever or the like can be adopted.

The transmission case 19 can differentially transmit a pair of left and right axles 36 at the lower end thereof through a differential gear mechanism by gear transmission by rotation of the input shaft 20. The rear wheel 9 is mounted on the axle 36. In such a configuration, when the accelerator pedal 3 is depressed, the wire 18
, And the brake of the brake 4 can be released from the braking state to the non-braking state via the wire 5. And when the centrifugal clutch 2 is engaged,
The input shaft 20 is transmitted via the belt continuously variable transmission 11, the axle 36 is transmitted, and the rear wheels 9 are driven and run. When the accelerator pedal 3 is released, the wire 18 is released.
, The rotation of the engine 1 is reduced and stopped. At the same time, the brake shoe 24 is pressed against the brake drum 21 via the wire 5 and the input shaft 20
And the rotation of the axle 36 is braked. Therefore, engine 1
Even if the centrifugal clutch 2 is in a disengaged state due to a decrease in the rotation of the vehicle, the rear wheel 9 does not rotate and does not naturally move on a steep slope.

When a sudden brake or the like is applied regardless of the operation of the accelerator pedal 3, the brake provided on the rear wheel 9 can be braked by depressing the brake pedal 14. In a state where the pedal is released from the accelerator pedal 3 and the rotation of the engine 1 is stopped, since the wire 5 is pulled by the spring 16, the brake arm 2
2 is rotated against the spring 25 and the brake shoe 24 is rotated.
Is pressed against the brake drum 21 to be in a braking state.

[Brief description of the drawings]

FIG. 1 is an explanatory block diagram showing an embodiment of the present invention.

FIG. 2 is a side view of the transmission mechanism.

FIG. 3 is a plan view thereof.

FIG. 4 is a side view of a cart unit.

[Explanation of symbols]

 1 engine 2 centrifugal clutch 3 accelerator pedal 4 brake 5 wire

Claims (3)

[Claims] In a vehicle that travels through a centrifugal clutch (2) that is turned on and off by the rotation of an engine (1), a brake (3) is released by releasing an accelerator pedal (3) that operates the rotation of the engine (1). 4) A braking device characterized by applying a braking force. 2. The vehicle braking device according to claim 1, wherein the accelerator pedal (3) and the brake (4) are connected by a wire (5). 3. The centrifugal clutch (2) includes a centrifugal mechanism (3).
7) The split V-pulley (2) of the belt continuously variable transmission (11)
The vehicle braking device according to claim 1 or 2, wherein the transmission is turned on and off by moving (7).