JPH0736860Y2 - Vehicle brake pedal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a brake pedal device for a vehicle in which left and right brakes are simultaneously operated by one brake pedal.

<Prior Art> For example, in a vehicle equipped with a front mower, conventionally, one brake pedal is provided on a vehicle body, and the brake pedal is interlockingly connected to left and right brakes via left and right brake rods, respectively. Therefore, there is a system in which the left and right brakes are simultaneously operated.

<Problems to be solved by the invention> By the way, for example, there is a demand to operate the left brake only while holding the traveling pedal to make a turn with a small turning radius. In the conventional case, the left and right brakes of the vehicle body can be operated at the same time. However, the brakes cannot be operated independently of each other, so it was difficult to make a sharp turn with a small turning radius.

In view of the above problems, the present invention makes it possible to easily make a sharp turn or the like by operating only one of the left and right brakes.

<Means for Solving the Problems> The technical means of the present invention for solving this technical problem is to fix one main brake pedal 31 to the pedal shaft 23 that is rotatably held around the shaft center. Provided, the main brake pedal 31 is linked to the left and right brakes via the pedal shaft 23 and the left and right brake rods 41, 43 respectively, and the pedal shaft 21 is rotated about the axis by the pedal operation of the main brake pedal 31. In a vehicle brake pedal device in which the left and right brakes are simultaneously braked, an auxiliary brake pedal 47 is swingably provided around the pedal shaft 23, and a flange portion 44 is fixed to the pedal shaft 23 and the flange portion 44 is fixed to the pedal portion 23. , An arc-shaped elongated hole 45 centered on the pedal shaft 23 is provided, and the brake rods 41, 43 are operated by the pedal operation of the auxiliary brake pedal 47.
One of the left and right brake rods 41, 4 moves in an arc shape in the long hole 45 to operate only one of the left and right brakes.
One of the three is connected to the auxiliary brake pedal 47 in an interlocking manner and inserted into the long hole 45 of the collar portion 44.

<Operation> When the main brake pedal 31 is depressed, the right brake rod 41 is pulled forward and the left brake rod 43 is pulled forward, so that the left and right brakes are simultaneously operated.

When the auxiliary brake pedal 47 is depressed, the brake rods 41,4
One of the three is pulled forward, and only the brake corresponding to the pulled brake rod is operated.
Therefore, for example, in the case of the embodiment, the vehicle 2 can be rapidly turned to the left by stepping on the left auxiliary brake pedal 47 and the right traveling pedal 27 at the same time.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 5, reference numeral 1 is a mowing work vehicle, and a mower 3 is attached to a lower front side of a small traveling vehicle 2.

The traveling vehicle 2 has a traveling vehicle body 8 formed by connecting the clutch housing 5 and the transmission case 7 in series in a forward direction from the engine 4. A front vehicle case 9 is provided on the left and right sides of a transmission case 7 containing a hydraulic continuously variable transmission 6 to support front wheels 10 for driving, and rear steering wheels 11 are arranged on the left and right sides of the engine 4.

A pilot seat 12 is mounted above the mission case 7, and a pilot device 13 is arranged in front of the pilot seat 12. Reference numeral 14 denotes a support frame extending slightly upward and forward from the mission case 7. The control frame seat 17 is supported by the support frame 14 and the traveling vehicle body 8. The control device 13 has a handle post 15 and the like on the control section seat 17. Is installed.

1 to 4 show the configurations of various pedal devices in the control section seat 17 portion. In FIG. 1, reference numeral 21 denotes a support cylinder arranged in the left-right direction below the control section seat 17, and a vehicle body 8 via a bracket 22. It is fixed to the side. A pedal shaft 23 in the left-right direction is inserted into and held by the support cylinder 21 so as to be rotatable about its axis. 24 is a clutch pedal, which is arranged on the left side of the vehicle body 8,
The boss portion 25 is rotatably fitted on the pedal shaft 23, and the clutch pedal 24 is swingably held around the pedal shaft 23. Reference numeral 27 denotes a traveling pedal of a hydrostatic transmission (HST), which is arranged on the right side of the vehicle body 8 and is linked to the HST via a pedal shaft 28 and a rod 29.

A main brake pedal 31 is arranged on the right side of the vehicle body 8 and is fixed to the pedal shaft 23 via a boss portion 32. That is, as shown in FIG. 6, the boss portion 32 of the main brake pedal 31 is externally fitted to the pedal shaft 23, and the detent pin 33 is radially inserted into the boss portion 32 and the pedal shaft 23 to prevent the detent. A retaining pin 34 is inserted and held at the insertion end of the pin 33. This retaining pin 34
Is a circular ring-shaped portion 35 into which a finger can be inserted as shown in FIG.
And an insertion portion 36 that linearly protrudes from one end of the annular portion 35,
A fitting portion 37 that protrudes in an arc shape from the other end of the annular portion 35 along the outer periphery of the anti-rotation pin 33, and a retaining portion 38 that is bent in a V shape so as to come into pressure contact with the insertion portion 36 from the fitting portion 37. And have. Compared with the conventional retaining pin 40 shown in FIG. 8, the retaining pin 34 has a larger diameter in the annular portion 35 and can be easily inserted into and removed from the retaining pin 33, and the retaining portion 38 is pressed against the insertion portion 36. As a result, there is less chance of accidental removal from the rotation stop pin 33.

Reference numeral 41 is a right brake rod, one end of which is connected to a collar portion 42 which is externally fitted and fixed to the pedal shaft 23, and the other end of which is interlocked with a right brake of a vehicle body 8 (not shown). 43 is a left brake rod, one end portion 43a of which is a flange portion 44 which is externally fitted and fixed to the pedal shaft 23.
It is inserted and held in the long hole 45, and the one end portion 43a is located at the rear end of the long hole 45 in a state where the brake operation is not performed.
The other end of the left brake rod 43 is connected to the left brake of the vehicle body 8 (not shown). By depressing the main brake pedal 31, the right brake rod 41 is pulled forward through the pedal shaft 23 and the collar portion 42, and the right brake is brake-operated, and at the same time, the pedal shaft 23 and the collar portion 44. The left brake rod 43 is pulled forward through the left brake, and the left brake is operated.

47 is an auxiliary brake pedal, which is arranged on the right side of the vehicle body 8,
The boss portion 48 is rotatably fitted onto the pedal shaft 23, and the auxiliary brake pedal 47 is swingably held around the pedal shaft 23. A flange portion 49 is externally fitted and fixed to the boss portion 48 of the auxiliary brake pedal 47, and one end portion 43a of the left brake rod 43 inserted through the flange portion 44 is fixedly inserted through the flange portion 49. By depressing the auxiliary brake pedal 47, the left brake rod 43 is pulled forward through the boss portion 48 and the collar portion 49, and at this time, the one end portion 43a of the rod 43 is inserted into the long hole 45 of the collar portion 44. On the other hand, it moves to the rear end side, and only the left brake rod 43 moves forward, so that the left brake is operated.

In the above embodiment, the auxiliary brake pedal 47 is provided on the left side of the vehicle body 8 and the auxiliary brake pedal 47 is linked to the left brake rod 43. However, instead of this, the auxiliary brake pedal 47 is provided on the right side of the vehicle body 8. Alternatively, the right brake rod 41 may be interlockingly connected. In addition, a pair of left and right auxiliary brake pedals 47 are provided, and each of these auxiliary brake pedals 47
May be interlocked with the right brake rod 41 and the left brake rod 43, respectively.

<Effect of the Invention> According to the present invention, the auxiliary brake pedal 47 is provided on the vehicle body 8, and the auxiliary brake pedal 47 allows the brake operation of only one of the left and right brakes.
Since 47 is linked to one of the left and right brake rods 41 and 43, it becomes possible to brake only one of the left and right brakes by the auxiliary brake pedal 47, for example, to make a sharp turn with a small turning radius. It is very convenient because the turning of the vehicle 2 is small. Moreover, the brake rods 41 and 43 of the main brake pedal 31 can be used as they are as the brake rods of the auxiliary brake pedal 47, the number of constituent members is small, the structure is simple, the manufacturing is easy and the cost is low.
An arcuate long hole 45 centered on the pedal shaft 23 is provided in the collar portion 44, and one of the brake rods 41 and 43 moves in an arcuate shape in the long hole 45 by the pedal operation of the auxiliary brake pedal 47, and the left and right brakes are provided. In order to brake only one of the
Since it is linked to 7 and inserted through the long hole 45 of the collar portion 44, the main brake pedal 31 and the auxiliary brake pedal 47 are connected.
However, both are swinging around the pedal shaft 23, and one of the brake rods 41 and 43 moves in an arc shape in the long hole 45 by the pedal operation of the auxiliary brake pedal 47, so the brake operation by the auxiliary brake pedal 47 is also possible. The brake operation by the main brake pedal 31 can be performed easily and smoothly, and its practical effect is remarkable.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention. FIG. 1 is a plan view of a pedal device portion, FIG. 2 is a side view of the same, FIG. 3 is a sectional view of the same, and FIG. 3 is a sectional view taken along the line AA in FIG. 3, FIG. 5 is an overall side view of the vehicle, FIG. 6 is a perspective view of a main brake pedal portion, and FIG. 7 is a plan sectional view of a retaining pin portion. FIG. 8 is a plan sectional view showing a conventional retaining pin. 8: traveling vehicle, 31: main brake pedal, 41: right brake rod, 43: left brake rod, 47: auxiliary brake pedal.

Claims (1)

[Scope of utility model registration request] 1. A pedal shaft 23 held so as to be rotatable about its axis.
In addition, one main brake pedal 31 is fixedly provided, and the main brake pedal 31 is attached to the pedal shaft 23 and the left and right brake rods.
A brake pedal device for a vehicle in which the left and right brakes are interlockingly connected via 41 and 43 respectively, and the pedal shaft 21 is rotated around the axis by the pedal operation of the main brake pedal 31 so that the left and right brakes are simultaneously operated. An auxiliary brake pedal 47 is swingably provided around the pedal shaft 23, a flange portion 44 is fixed to the pedal shaft 23, and an arc-shaped long hole 45 having the pedal shaft 23 as a center is provided in the flange portion 44. , Brake rod 41, 43 by pedal operation of the auxiliary brake pedal 47
One of the left and right brake rods 41, 4 moves in an arc shape in the long hole 45 to operate only one of the left and right brakes.
A brake pedal device for a vehicle, characterized in that one of the three is interlockingly connected to an auxiliary brake pedal 47 and is inserted into the long hole 45 of the collar portion 44.