JPH085401B2 - Braking device for self-propelled vehicles - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a traveling vehicle such as a speed player that uses a single brake, and a braking force (amount of depression of a brake pedal) with a single brake and normal traveling (both brakes). ) Relates to a brake pedal device capable of switching the magnitude of the braking force. In other words, since agricultural vehicles need to turn with a small radius, many of them have a structure in which the brake can be applied to only one of the left and right sides. Therefore, when one-sided braking is required, the wheels must be driven while being locked, so that a large braking force, such as 3 to 5 times, is required compared to normal braking. Therefore, it is an object of the present invention to switch the braking force during single braking and during normal braking with a simple device.

[Conventional technology]

Conventionally, a braking device is provided so as to obtain a necessary braking force at the time of one-side braking, and at the time of both braking, the braking force used at the one-side braking is simultaneously applied to the left and right.

Further, there is a device disclosed in Japanese Utility Model Laid-Open No. Sho 63-192184 as a self-propelled vehicle using a left and a right brake pedal and a brake device capable of independently braking a left wheel and a right wheel.
This is to operate the traveling clutch in conjunction with the connection of the left and right brakes.

[Problems to be Solved by the Invention]

As is often used in the past, when both brakes are used, the method of simply connecting the left and right pedals (or pedal stays, etc.) to the one brake requires a large braking force as described above. Since the brake device that satisfies the performance is used as it is for both brakes, an excessively large braking force is applied as a result, and there is a risk that the worker is shaken off the vehicle due to sudden braking. Also, just to withstand such sudden braking,
The strength of the driving part and the entire vehicle body is required.

The device disclosed in Japanese Utility Model Laid-Open No. Sho 63-192184 is a mechanism for interlocking with a brake to cut the traveling clutch, and since the driving force from the engine can be cut off when both brakes are applied, the brake is applied from the engine. For the drive unit up to, there is no excessive force applied, but since a large force is applied between the brake and the wheels and the braking force is large, it does not pose a danger to the operator or the entire vehicle. Such unreasonable force cannot be excluded.

[Means for solving the problem]

The present invention will be described using the reference numerals of the drawings corresponding to the embodiments.

The brake device of the present invention comprises a pedal shaft (1) whose end is fixed to the frame (5), and a left brake pedal (2) rotatably juxtaposed on the pedal shaft (1). ), The cam (4) and the right brake pedal (3),
A return spring (16 ″), one side of which is locked to the side edge of the cam (4) and the other side of which is locked to the frame (5) to bias the cam (4) in place. , The left or right brake pedal (2 or 3) is rotatably supported by either one of the bases in the axial direction of the pedal shaft (1), and the other brake pedal (3 or 2) and cam (4) A locking member (15) that is integrally rotatably locked to an engaging portion (12, 12 ') provided on the side edge of the frame, and the inside of the frame (5) on the front side of the pedal shaft (1). A pin (10) is inserted into a guide member (9) formed at the end of the guide member (9) so that the pin (10) can be advanced and retracted in the front-rear direction. The stay (8) that maintains the front position on the brake body side together with the stay (8)
To the outer pipe (7a, 7a) of the brake wire (7, 7 '), one end of which is locked to the frame near the brake body and the other end of which is locked to the frame.
7a ') and these outer pipes (7a, 7a'), respectively, and one end of the left and right brake pedals (2, 3)
And a braking force transmitting means having an inner wire (7b, 7b ') connected to the brake main body for braking the left wheel and the right wheel at the other end thereof. (8) is fixed to the front position to reduce the depression amount of the brake pedal, and in the case of simultaneous left and right braking operation, the locking member (15) is tilted and locked to the engaging portions (12, 12 '). By doing so, the stay (8) is allowed to move to the rear position, and the depression amount of the brake pedal is increased.

[Action]

In the braking device of the present invention having the above configuration,
During general driving, the locking member (15) is tilted down to engage the engaging parts (12,1).
The left and right brake pedals (2, 3) and the intermediate cam (4) can be brought into an interlocking state by engaging with the brake wire (7, 7). ′)
By disengaging the stay (8) from which one end of the outer pipe (7a, 7a ') is locked, the stay (8) can be moved rearward, and when one-side braking is required, By releasing the locking between the locking member (15) and the engaging portions (12, 12 '), the left and right brake pedals (2, 3) and the cam (4) are released from each other, and The cam (4) holds the position of the stay (8) at the front position, while the left and right brakes can be individually activated.

〔Example〕

 A configuration example of the present invention is shown in FIG.

Left and right brake pedals 2 and 3 and a cam 4 between them are separately provided on the pedal shaft 1, and both ends of the pedal shaft 1 are pedal shaft bosses 6 and 6 ′ fixed to a frame 5. It is supported. Brake wire 7, in contact with the cam 4,
A stay 8 to which one end of the outer pipe 7a, 7a 'of 7'is fixed
Is provided. Both ends of the stay 8 are supported by a guide member 9 having a U-shaped cross section through a guide pin 10 and a spring body 11, and return springs 16 and 16 are respectively provided to the left and right brake pedals 2 and 3 and the cam 4. ′, 16 ″ is provided.

In the upper part where the stay 8 and the cam 4 in FIG.
A stopper 8'is provided to prevent the upper part from rotating upward.
Between the cam 4 and the frame 5, the cam 4 is urged toward the stopper 8'by the return spring 16 ".

In FIG. 3, an arm 13 is provided on the right brake pedal 3.
A return spring 16 'is provided between the frame 5 and the frame 5, a stopper bolt 17 is provided on a metal member fixed to the frame 5, and the right brake pedal 3 is urged toward the stopper bolt 17 side. One end of the outer pipe 7a 'of the brake wire 7'is fixed to the stay 8, and the tip of the inner wire 7b' is connected to the other end of the arm 13. The above relationship is the same for the left brake pedal 2 as well, so description thereof will be omitted.

The stay 8 is supported by the guide member 9 via the guide pin 10 as described above, and can be slid back and forth along the guide pin 10.
Normally, the stay 8 is moved forward of the vehicle by the action of the spring body 11 (arrow F).
(Indicated by).

The base of the arm 13 of the left (or right) brake pedal 2 (or 3) (the left brake pedal 2 in the illustrated example) is rotated around a fulcrum shaft 14 so as to move in the axial direction of the pedal shaft 1. A locking member 15 which undulates between is provided, and the locking member 15 is tilted down to engage the boss portion of the cam 4 and the boss portion of the right brake pedal 3 with the engaging portions 12 and 12 protruding outward in the radial direction. The left and right brake pedals 2 and 3 and the intermediate cam 4 can be interlocked with each other by locking them to ′.

In the state shown in FIG. 1, since the left and right brake pedals 2 and 3 are not connected, one-side braking is possible. At this time, when the right brake pedal 3 is stepped on, the left brake pedal 2 and the intermediate cam 4 are separated and do not move. Therefore, only the right inner wire 7'is pulled to brake the right wheel. Since the cam 4 is still in the illustrated state, the stay 8 is fixed in the front direction of the vehicle, the depression amount of the right brake pedal 3 is small, and the inner wire 7 ′ is set according to the depression amount of the right brake pedal 3. Is pulled and transmitted to the brake side.

When the locking member 15 is tilted down so that the left and right brake pedals 2 and 3 and the intermediate cam 4 are interlocked with each other, both brakes can be applied during normal traveling. At this time, even if one of the left or right brake pedals 2 or 3 is stepped on, the left and right brake pedals 2 and 3 are connected, which is the same as stepping on both brakes. By depressing the left and right brake pedals 2 or 3, the intermediate cam 4 also rotates around the pedal shaft 1 to release the engagement with the stay 8 and allow the stay 8 to move to the rear position. The left and right inner wires 7, 7'are both pulled by stepping on the brake pedal 2 or 3, but at this time, the spring body 11 is compressed to a position where the operating force on the brake side and the pedaling force of the brake pedal 2 or 3 are balanced. Therefore, the amount of depression of the brake pedal 2 or 3 is large, and the amount of depression of the brake pedal 2 or 3 cannot be directly transmitted to the brake side. As a result, at this time, the braking effect is moderate.

With these, the ability of the brake can be exerted in the case of one-sided braking, and some percentage of the braking ability will be used in the case of both-sided braking.

[Effects of the Invention] At the time of one-brake turning, which requires a large braking force,
Braking is performed by making full use of the ability of the brake itself, and a small braking force can be obtained when braking both brakes that do not require a large braking force.

Compared with the conventional pedal device, a simple mechanism can be used, in which only a cam mechanism between the brake pedals and a mechanism for supporting the stay with a spring body are added.

Similar to the conventional switching between the one-brake and the two-brake, it can be performed by a simple operation of only operating the locking member.

Since it is possible to prevent excessive sudden braking from being applied during general driving, there is no danger to the operator.

As described above, since sudden braking more than necessary is not applied, an unreasonable force is not applied to the drive device and the entire vehicle, and damage or the like can be prevented.

Similarly, excessive braking is not required, so that wear of the brake lining and the like can be reduced.

[Brief description of drawings]

The accompanying drawings show an embodiment of the present invention. FIG. 1 is a perspective view of the whole, and FIGS. 2 and 3 are side views showing partial cross sections. 1 ... Pedal shaft, 2 ... Left brake pedal, 3 ... Right brake pedal, 4 ... Cam, 5 ... Frame, 7,7 '... Brake wire, 7a, 7a' ... Outer pipe, 7b, 7b '... Inner wire, 8 ... Stay, 9 ... Guide member, 10 ... Pin, 11 ... Spring body, 12, 12 '... Engaging portion, 15 ... Locking member, 16 "... Return spring.

Claims (1)

[Claims] 1. A self-propelled vehicle equipped with a brake device capable of independently braking a left wheel and a right wheel, and a pedal shaft (1) fixed at its end to a frame (5) and the pedal shaft (1). ) A left brake pedal (2), a cam (4), and a right brake pedal (3) that are separately rotatably installed side by side on top of each other.
And a return spring (16 ″), one side of which is locked to the side edge of the cam (4) and the other side of which is locked to the frame (5) to bias the cam (4) in place. ), And the left or right brake pedal (2 or 3) is rotatably supported in the axial direction of the pedal shaft (1) on the base of either one of the left and right brake pedals (2 or 3), and the other brake pedal (3 or 2) and cam (3). 4) A locking member (15) which is integrally rotatably locked to an engaging portion (12, 12 ') provided on the side edge of the frame, and the frame (5) on the front side of the pedal shaft (1). ) A pin (10) is inserted into a guide member (9) formed on the inner side of the guide member (9) so that the pin (10) can be advanced and retracted in the front-rear direction and is urged by a spring body (11) to a forward position and to the cam (4). A stay (8) whose front position on the brake body side is maintained by the engagement of
To the outer pipe (7a, 7a) of the brake wire (7, 7 '), one end of which is locked to the frame near the brake body and the other end of which is locked to the frame.
7a ') and these outer pipes (7a, 7a') respectively, and one end of the left and right brake pedals (2, 3)
And a braking force transmitting means having an inner wire (7b, 7b ') connected to the brake main body for braking the left wheel and the right wheel at the other end. (8) is fixed to the front position to reduce the depression amount of the brake pedal, and in the case of simultaneous left and right braking operation, the locking member (15) is tilted and locked to the engaging portions (12, 12 '). By so doing, the stay (8) is allowed to move to the rear position, and the amount of depression of the brake pedal is increased, whereby a brake device for a self-propelled vehicle is provided.