JPH0444456Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a parking brake for a vehicle, particularly one in which the shape of the brake lever is unique.

(Prior Art) Conventionally, a parking brake has been provided in an automobile or various types of movable riding working machines to prevent the vehicle body from moving during parking. The general structure of such a parking brake is that the brake lever is rotatably disposed inside a box-shaped case fixed to the vehicle body, or the brake lever is rotatably supported on one side of a base plate fixed to the vehicle body. A cable connected to the braking mechanism is connected to this brake lever.

(Problems to be Solved by the Invention) However, when the brake lever is disposed within the box-like case, the entire device becomes large and the assembly is troublesome. Further, when the brake lever is supported on one side of a base plate fixed to the vehicle body side, the rotation of the brake lever tends to be loose, and furthermore, it becomes difficult to secure space for installing a switch for an alarm device.

(Means for solving the problem) In order to solve the above problem, the present invention fixes a base plate to the vehicle body side, and attaches a brake cable and a bracket for holding the cable to one side of the base plate, and a bracket to hold the cable to the other side. The brake lever is equipped with a switch that activates a warning device to alert the operator, and the base of the brake lever is a bifurcated part that sandwiches the base plate from the left and right.One of the forked parts has an arm connected to the brake cable, and the other has the arm connected to the brake cable. An arm is provided to operate the switch.

(Example) An example of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a side view showing an example in which the parking brake according to the present invention is applied to a riding lawn mower, and FIG. 2 is a plan view of the riding lawn mower.

The riding lawnmower 1 has front wheels 4, 4 steered by a handle 3 at the front of a frame 2, and rear wheels 6, 6 driven by an engine 5 at the rear.
That is, an output shaft 7 extends downward from the engine 5 with a vertical crankshaft, a drive pulley 8 is fitted onto the output shaft 7, and an input shaft 9 supported at the rear of the fuselage is fitted onto the drive pulley 8. A belt 11 is adjusted between the drip pulleys 10, the rotation of the input shaft 9 is transmitted to the transmission gear in the transmission case 13 via the bevel gear 12, and the rotation of this transmission gear is transmitted to the rear wheel shaft 14 via the reduction gear. I try to do that.

Further, a cutter housing 16 housing a cutter blade 15 is arranged between the front wheels 4, 4 and the rear wheels 6, 6, and this cutter housing 16 is connected to a link 17.
It can be freely raised and lowered with respect to the frame 2 via... A shaft 18 is rotatably provided in the cutter housing 16 via a bearing, the cutter blade 15 is fixed to the lower end of the shaft 18, a driven pulley 19 is fitted to the upper end of the shaft 18, and the driven pulley 19 and the input Pulley 2 fitted to the lower end of shaft 9
A belt 21 is stretched between the two, and the cutter blade 15 is rotated by the power of the engine 5.

A drum brake is built into the mission case 13, and a brake arm 22 for operating the drum brake is provided on the right side of the mission case 13, and the brake arm 22 and the right member of the frame 2 are rotatable. A connecting arm 23 attached to the vehicle body is connected by a rod 24, and a long hole formed in the connecting arm 23 is connected to a boot brake pedal 25 provided at the front of the vehicle body by a brake rod 26.

On the other hand, a parking brake device 28 is provided on the right side of the vehicle body below the seat 27. Fig. 3 is a side sectional view (sectional view taken along line B-B in Fig. 4) of the parking brake device of the present invention; Fig. 4 is a view taken along arrow A in Fig. 3;
FIG. 5 is an exploded view of the main parts of the parking brake device. In addition, in Fig. 3, the part behind the line B-B in Fig. 4 is a solid line or a broken line (hidden line), the part in front of the line B-B is a dashed-dotted line (imaginary line), and the part after the raising operation is a dashed-double line. (Imaginary line) Also, if there is a difference between Figure 5 and Figures 3 and 4, please refer to Figure 3,
Figure 4 is correct.

As shown in FIG. 5, the parking brake device 28 consists of a base plate 29, a brake lever 30 that is fitted onto the base plate 29 from above and is rotatably locked by a pin 52, and accessory members described below.

As shown in FIGS. 3 and 4, the base plate 29 is fixed to the frame 2. As shown in FIGS. A bracket 31 is provided at the rear lower end of the base plate 29 toward the right side of the vehicle body (outside the vehicle body), and an outer 32a of a brake cable 32 is fixed to this bracket 31 via nuts 33, 33. A bracket 34 is provided on the side opposite to the bracket 31 (left side of the vehicle body), and a switch 35 for activating a warning device such as a buzzer or a lamp is attached to this bracket 34.

A part of the base plate 29 is attached to the cam portion 3.
6, the rear upper end of the base plate 29 serves as a stopper portion 37.

Further, the base of the brake lever 30 is formed into two forked parts 38, 38 which sandwich the base plate 29, and these two forked parts 38, 38 are rotatably attached to the base plate 29 via a pin 52. Arms 39 and 40 are integrally provided in each of the forked parts 38 and 38, and an inner 32b of the brake cable 32 is tied to the arm 39, and a rear end of this inner 32b is connected to a connecting member 42 (first (see figure)
This connecting member 41 connects to the connecting arm 2.
It is engaged with another elongated hole formed in 3. Further, the arm 40 is provided with an operation plate 42 for turning on and off the switch 35.

Further, the tip of the brake lever 30 is a cylindrical portion 43, a grip 44 is attached to the outer periphery of the cylindrical portion 43, a push rod 45 is inserted into the cylindrical portion 43, and the cylindrical portion 43 is attached to the tip of the push rod 45. An operating knob 46, which is partially exposed, is attached to the distal end thereof, and this operating knob 46 is urged outward by a spring 47. And pushyrod 4
The rear end of 5 is a ratchet 49 that is rotatably attached to the brake lever 30 about a fulcrum 48.
is connected to. Furthermore, a return spring 50 is stretched between the brake lever 30 and the base plate 29.

In the above, from the state where the cylinder body 43 is approximately horizontal as shown by the solid line in FIG.
0 and rotate it clockwise in FIG. 3 about the pin 52. Then, the inner 32b of the brake cable 32 is pulled by the arm 39, and the connecting arm 23, the rod 24, and the brake arm 22 are operated as a result of this tension, and a braking force is generated. Along with this braking operation,
The operation plate 42 of the arm 40 comes into contact with the switch 35, and when the switch 35 is closed, an alarm device such as a buzzer or a lamp is activated. Here, it is preferable that the operation of these alarm devices be linked to the driving of the engine, so that they are activated only when the engine is driving. By doing this,
There is no waste in power consumption, and it prevents the vehicle from starting with the parking brake applied.

Incidentally, the operation of the parking brake, the operation of the foot brake, and the operation of the foot brake are all performed via the connecting arm 23, and two elongated holes are formed in the connecting arm 23, one of which is used for the parking brake. engaging the operating force transmission member;
Since the operating force transmission member of the foot brake is engaged with the other elongated hole, even if one of the elongated holes is activated and the connecting arm 23 rotates, the other elongated hole escapes and does not move in any way.

When the rear end of the brake lever 30 is rotated to a position where it abuts the stopper part 37 of the base plate 29, the latch 49 is biased counterclockwise in the figure, so the latch 49 moves against the stepped part of the cam part 36. , the brake lever 30 is fixed at that position, and a constant braking force is maintained.

Moreover, to release the braking force, the operating knob 46 is pushed into the cylinder body 43 with a finger. Then, the ratchet 49 is rotated clockwise by the push rod 45, the engagement between the ratchet 49 and the cam portion 36 is released, and the brake lever 30 is rotated counterclockwise by the tensile force of the return spring 56. rotate,
Due to this rotation, the inner 32b of the brake cable 32 is returned, the braking force is released, and the switch 3
5 is opened, and the operation of alarm devices such as buzzers is stopped.

(Effects of the invention) As explained above, according to the invention, the base of the brake lever rotatably supported by the base plate is made into a bifurcated part, and the base plate is sandwiched between the two forks from the left and right sides. Compared to the case where the brake lever is mounted on one side of the base plate, there is no wobbling when the brake lever rotates, and since the operated parts can be placed on both sides of the base plate, space can be used effectively. Since there is no need to make it into a box shape, the overall structure can be made more compact.

[Brief explanation of the drawing]

Fig. 1 is a side view of a riding lawn mower to which the parking brake according to the present invention is applied, Fig. 2 is a plan view of the same lawn mower, and Fig. 3 is a side sectional view of the parking brake device of the present invention (as shown in Fig. 4). BB line sectional view), 4th
The figure is a view taken in the direction of arrow A in FIG. 3, and FIG. 5 is an exploded view of the main parts of the parking brake device. In addition, in the drawing, 1 is a riding lawn mower, 2 is a frame,
22 is a brake arm, 23 is a connecting arm, 28
is the parking brake, 29 is the base plate,
30 is a brake lever, 31 and 34 are brackets, 32 is a brake cable, 35 is a switch,
38 is a bifurcated portion, 39 and 40 are arms, and 49 is a ratchet.

Claims (1)

[Scope of Claim for Utility Model Registration] A parking brake in which a brake lever is rotatably attached to a base plate attached to the aircraft body, in which a brake cable and a bracket for holding the cable are mounted on one side of the base plate, On the other side is a switch that activates a warning device to alert the operator.The base of the brake lever is a bifurcated part that sandwiches the base plate from the left and right, and one of the bifurcated parts has an arm connected to the brake cable. Further, the parking brake is characterized in that the other of the two forked parts is provided with an arm for turning on and off the switch.