JPH051489Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a braking device for a tracked vehicle.

[Conventional technology]

Conventionally, in tracked vehicles that use metallic clutch plates, when parking, the link system is fixed by engaging the pawl attached to the lever with the teeth fixed to the vehicle body to maintain braking force. I was trying to do that.

[Problem that the invention attempts to solve]

The conventional brake system for tracked vehicles uses a highly rigid metallic clutch plate in the brake system, so if there is some slack in the link system, all of the brake operating force cannot be converted into braking force. , braking ability decreases. Furthermore, in order for the claws and teeth to mesh, a slight gap is required between them, which also reduces the braking ability. Also, each time the metallic clutch plate wore out, the link system had to be adjusted, which required a lot of effort.

[Means for solving problems]

The present invention addresses the above-mentioned problems, and consists of a lever that pivots the base end of a rod A connected to a braking device, a rotating shaft A to which one end of the brake pedal is fixed, and An arm A whose one end is connected via a one-way clutch, a stopper, and a rotating shaft B to which the base end of a parking brake lever is fixed.
and an arm B whose one end is fixed to the rotating shaft B.
, a spring support tube whose one end is pivoted to a pivot point Y provided at the other end of arm A, and a spring support tube whose one end is pivoted to a pivot point Z provided at the other end of arm B. A rod B whose end is slidably inserted into the spring support tube, a spring interposed between the spring support tube and the other end of the rod B, and a rod B which is erected near the rotation axis B. Arm A and arm B have rotated around rotational axes A and B to a position where the pivot point Z is outside the line connecting the pivot point Y and the axis of the rotational axis B. According to the present invention, there is provided a braking device for a tracked vehicle, characterized in that a stopper and a vehicle body side come into contact with each other, and an arm A and a rotating shaft A are connected by a one-way clutch.

[Effect]

The braking system for a tracked vehicle according to the present invention is constructed as described above, and normally the brake pedal is depressed. Then, the movement is transmitted to the braking device via the rotating shaft A, lever and rod A, and the braking device is activated. At that time, the one-way clutch provided between the rotating shaft A and the arm A prevents the arm A from rotating the rotating shaft A due to the depression of the brake pedal.
The parking brake lever does not move. When parking the vehicle, the driver depresses the brake pedal, transmits the motion to the brake device via the rotation shaft A and the lever, operates the brake device, and then pulls up the parking brake lever. Then, the movement of the parking brake lever is transmitted to the rod B via the rotating shaft B and the arm B, and the rod B projects into the spring support cylinder, compressing the spring. Therefore, the spring support cylinder pushes the arm A in the direction in which the braking device is actuated, the arm A swings in the same direction, and the swinging of the arm A rotates through the one-way clutch provided between it and the rotating shaft A. The rotation of the rotary shaft A is further transmitted to the braking device via the lever and rod A. The movement of the parking brake lever continues until the pivot point Z between the arm B and rod B moves to the operating position and the stopper attached to the rotating shaft B together with the parking brake lever comes into contact with the stopper on the vehicle body.
In this state, the reaction force of the spring is transmitted to the braking device via the spring support tube, arm A, rotating shaft A, and lever, and the braking device is held at the braking position.
In addition, the reaction force of the spring is transmitted to the rotating shaft B via the rod B and the arm B, and the stopper provided on the rotating shaft B continues to contact the stopper on the vehicle body, and the parking brake lever is held in the operating position. Ru.

〔Example〕

Next, the braking system for a tracked vehicle according to the present invention will be explained with reference to an embodiment shown in FIGS. The connected rod A and the rod A10 are pivotally supported by the lever 9.
12 is the brake pedal 1 and the lever 9.
The brake pedal 1 and the lever 9 are swingably supported by a rotating shaft A12 having one end fixed to the rotating shaft A12. Further, 5 is an arm A, 2 which is swingably attached to the rotating shaft A12.
is the parking brake lever, 6 is the arm B, 13 is the rotation axis B, and the same parking brake lever 2 and the same arm B
6 is fixed to the same rotating shaft B13, and the same rotating shaft B13 is fixed to the same rotating shaft B13.
It is swingably supported by 13. Further, 4 is a spring support tube, and one end of the spring support tube 4 is pivotally supported by the arm A5. Hereinafter, this pivot point will be referred to as pivot point Y. Further, 7 is a rod B, 8 is a holder fixed to the other end of the spring support cylinder 4, and one end of the rod B7 is connected to the cylindrical spring receiver provided inside the holder 8. The above spring support tube 4
The same rod B7 is fitted in a swingable manner.
The other end is pivotally supported by the arm B6. Hereinafter, this pivot point will be referred to as pivot point Z. Same spring support tube 4
A spring 3 is interposed between the rod B7 and the spring receiver of the rod B7, and the pivot point Z of the rod B7 and the arm B6 is the pivot point Y of the arm A5 and the spring support tube 4.
The stopper 2a that comes into contact with the stopper 11 on the vehicle body side when moved to the operating position (see A in FIG. 1) beyond the straight line There is. The pivot point Z of the rod B7 and the arm B6 moves beyond the straight line X to the operating position, and the arm A5
A one-way clutch (not shown) is provided between the arm A5 and the rotation axis A12 for connecting the arm A5 to the rotation axis A12 when the arm A5 swings in the operating direction.

Next, the operation of the braking device for the tracked vehicle will be specifically explained. Normally, when you press brake pedal 1,
The movement is the rotation axis A12, the lever 9, and the rod A1.
0 to a braking device (not shown), and the braking device operates. At this time, the one-way clutch provided between the rotating shaft A12 and the arm A5 does not transmit the rotation of the rotating shaft A12 to the arm A5, and the parking brake lever 2 is not moved. When parking the vehicle, step on the brake pedal 1, transmit the movement to the braking device via the rotating shaft A12, the lever 9 and the rod A10, and operate the braking device.
Pull up parking brake lever 2. Then, the movement of the parking brake lever 2 will move towards the rotation axis B13.
is transmitted to rod B7 via arm B6,
The rod B7 protrudes into the spring support cylinder 4, and the spring 3 is compressed. Therefore, the spring support cylinder 4 pushes the arm A5 counterclockwise, the arm A5 swings in the same direction, the swing of the arm A5 is transmitted to the rotation shaft A12 via the one-way clutch, and the rotation shaft The rotation of A12 is transmitted to the braking device via lever 9 and rod A10. The movement of the parking brake lever 2 is such that the pivot point Z of the arm B6 and rod B7 moves to the A position, and the parking brake lever 2
This continues until the stopper 2a comes into contact with the stopper 11 on the vehicle body side, but in this state, the reaction force of the spring 3 is applied to the braking device via the spring support tube 4, the arm A5, the rotating shaft A12, the lever 9, and the rod A10. The braking device is held in the braking position. Further, the reaction force of the spring 3 is transmitted to the rotating shaft B13 via the rod B7 and the arm B6, and the stopper 2a continues to contact the stopper 11 on the vehicle body side, so that the parking brake lever 2 is held in the operating position. At this time, the braking force acting on the braking device via arm A5 is
The distance from the pivot point Y between arm A5 and spring support tube 4 to the pivot point Z between arm B6 and rod B7 during non-operation is l ₁ , and from the pivot point Y between arm A5 and spring support tube 4 to arm B6. Assuming that the distance between the rod B7 and the pivot point Z during operation is l ₂ and the spring constant of the spring 3 is k, it is expressed as (l ₁ -l ₂ )k. Furthermore, arms A and B
5 and 6 are attached to the rotating shafts A and B so that l ₁ > l ₂ . Further, the operating force by the parking brake lever 2 is R ₂ /R 1 where the radius of the rotating shaft B13 is R 1 and the length of the parking brake lever _{2 is R 2 .}
It is twice as large and is sufficiently large, so that (l ₁ −l ₂ )k can be made large relative to the operating force.

[Effect of idea]

The braking device for a tracked vehicle of the present invention is constructed as described above, and since there is no gap in the interlocking mechanism from the parking brake lever to the braking device during operation, the brake operating force applied to the parking brake lever is Everything can be converted into braking force. Furthermore, as described above, since the brake operating force applied to the parking brake lever is transmitted to the braking device via the spring, even if the clutch plate wears out, it can be absorbed and there is no need for adjustment.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a braking device for a tracked vehicle according to the present invention, and FIG. 2 is a longitudinal sectional side view of a spring support cylinder portion. DESCRIPTION OF SYMBOLS 1... Brake pedal, 2... Parking brake lever, 2a... Stopper, 3... Spring, 4... Spring support tube, 5... Arm A, 6... Arm B, 7
... Rod B, 9... Lever, 10... Rod A, 11... Stopper on the vehicle body side, 12... Rotating shaft A, 13... Rotating shaft B.

Claims (1)

[Scope of utility model registration request] A lever that pivots the proximal end of a rod A connected to a braking device, a rotating shaft A to which one end of the brake pedal is fixed, and an arm A whose one end is connected to the rotating shaft A via a one-way clutch. , a stopper, a rotating shaft B to which the base end of the parking brake lever is fixed, an arm B having one end fixed to the rotating shaft B, and a pivot point Y provided at the other end of arm A.
a spring support tube, one end of which is pivotally supported, and one end of which is pivoted to a pivot point Z provided at the other end of arm B, and the other end is slidably inserted into the spring support tube. It consists of a rod B, a spring interposed between the spring support cylinder and the other end of the rod B, and a stopper on the vehicle body side installed near the rotation axis B, and the pivot point Z is the pivot point Y. Arm A and arm B move toward the axis of rotation A until they reach the outside of the line connecting the axis of
A braking device for a tracked vehicle, characterized in that when it rotates around a rotation axis B, a stopper and a vehicle body side come into contact with each other, and an arm A and a rotation axis A are connected by a one-way clutch.