JPS5930752Y2 - Driveshaft braking device for tractors, etc. - Google Patents

Description

[Detailed description of the invention] The present invention relates to a drive shaft braking device for a tractor, etc., and more specifically, it provides a braking device that can immediately stop a drive shaft rotating due to inertia after the clutch is disengaged by clutch operation. It is.

Clutch operation in conventional tractors, etc. involves depressing the clutch pedal just before stopping the moving machine and when changing the running speed of the machine to disable the transmission of the engine's driving force to the drive shaft. After stopping rotation, the brakes or gears were changed.

By the way, in conventional clutch operation, even if the clutch is disengaged, the drive shaft does not stop immediately due to inertia.

Therefore, there is no problem when operating the brakes, but when changing gears, if you operate the shift lever immediately after disengaging the clutch by operating the clutch, the rotating gears will engage incorrectly due to inertia and the gears will make noise. If this occurs or the rotation speed has not reached low speed, the gear shift operation becomes impossible.

The present invention was developed in view of the above circumstances.Following the disengagement of the clutch by depressing the clutch pedal, braking force is applied to the drive shaft, and the rotation of the drive shaft is stopped almost simultaneously with the disengagement of the clutch, thereby allowing the gearshift operation to be performed. The purpose of the present invention is to provide a braking device for a drive shaft that can smoothly perform the following without any support after clutch operation.The present invention will be described in detail below with reference to drawings showing embodiments thereof.

FIG. 1 is a right side view of a tractor 1 equipped with a drive shaft braking device according to the present invention (hereinafter referred to as the device), in which 2 is a front wheel, 3 is a rear wheel, 4 is a clutch housing,
Reference numeral 5 indicates a mission case connected to the rear of the crutch no-using 4, and reference numeral 6 indicates an agricultural machine swingably connected to a top link and a lower link provided at the rear of the machine, with a lift arm (not shown). It can be driven up and down.

7 indicates a seat, and 8 indicates a brake pedal.

Fig. 2 is a left side view of the clutch housing with the proposed device attached, and numeral 10 indicates an abbreviated shape with one end rotatably supported on the rear lower side surface of the clutch housing 4. This is a clutch pedal, and the other end has a foot pedal 10a.
is installed.

Further, a clutch drive lever 11 is integrally attached to the one end of the clutch pedal 10 so as to form a V-shape at a predetermined angle with the clutch pedal 10,
This clutch pedal 10 has a carp shaft.

The shaft 31 is designed to be able to securely bind the drive shaft 33.

The operation of braking the drive shaft using the present device configured as described above will be explained.

By depressing the clutch pedal 10 against the biasing force of the coil spring 10b, the clutch drive arm 13 is first driven, and at a predetermined rotational position of the clutch pedal 10, the clutch is disengaged and the transmission of the drive shaft 33 is cut off. .

Subsequently, when the clutch pedal 10 is further depressed to bring the back surface of the foot pedal 10a into contact with the pedal stopper 14, the clutch brake drive lever 15 is driven, and in conjunction with this, the clutch brake arm 16 rotates clockwise. .

As the clutch drive arm 16 rotates, the camshaft 19 rotates, the position of the tapered cam surface 19b changes, and the tapered cam surface 19b pushes the cam bolt 22 into the clutch housing 4, causing the drive that is in contact with the cam bolt 22 to move. The plate 28 is pressed toward the drive shaft 33, and the belt attachment member 27 is rotated counterclockwise about the attachment rod 24 as a fulcrum.

By this rotation of the belt attachment member 27, both ends of the brake belt 31 are pulled in the direction away from the drive shaft 33, and the brake belt 3F binds the drive shaft 33, thereby rubbing the outer circumferential surface of the drive shaft 33. The drive shaft 33, which is rotating due to inertia, is stopped by the frictional force.

When the clutch pedal 10 is released, the clutch pedal 10 returns to the position where it is regulated by the stopper 10c due to the biasing force of the coil spring 10b.

On the other hand, due to the elastic force of the brake belt 31, the belt attachment member 27 rotates clockwise and returns to its original position, and the brake belt 31 is relaxed with respect to the drive shaft 33 and becomes in a non-contact state.

Further, in conjunction with the rotation of the belt attachment member 270, the drive plate 28 rotates toward the cam bolt 22, returning to the original state in which the cam bolt 22 is pushed out of the clutch housing 4.

In this way, when the clutch pedal 10 is depressed until it contacts the pedal stopper 14, a braking force is applied to the drive shaft 33 and the drive shaft 33 can be stopped immediately. It becomes possible to perform a gear change operation immediately after the operation.

In the embodiment described above, when the clutch pedal 10 is released, the belt mounting portion 27 is rotated back clockwise by the elastic force of the brake belt 31.
A coil spring is connected to the collar 26, one end of which is connected to the clutch housing 4, and the other end is connected to the collar 26.
The rotation can be made more reliable by fixing the collar 26 to a clockwise direction and applying a clockwise biasing force to the collar 26.

As described in detail above, according to the present device, the clutch brake drive arm 16 is driven in conjunction with the depression operation of the clutch pedal 10, and the brake mechanism 25 disposed inside the clutch housing 4 is driven by the cam mechanism. By sliding the brake belt 31 surrounding the drive shaft 33 against the outer peripheral surface of the drive shaft, the rotation of the drive shaft 33, which is rotating due to inertia, can be quickly stopped. It is possible to do this immediately after the clutch operation, eliminating the need for a duffle clutch, making it easier for even beginners to drive tractors, etc., and reducing fatigue caused by gear shifting operations. There are advantages.

In addition, a clutch pedal 10 and a clutch brake drive lever 1
5, the brake belt 31 does not operate in the clutch-off state until the clutch pedal 10 comes into contact with the clutch-brake drive lever 15, and therefore unnecessary wear of the brake belt 31 can be prevented.

Further, the clutch brake drive lever 15 is connected to the camshaft 1
Since the brake assembly 25 is driven through the brake assembly 9 and the cam bolt 22, it has a simple structure and has the excellent effect of reliable operation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a right side view of a tractor equipped with the proposed device, Fig. 2 is a left side view of the clutch housing showing the proposed device, and Fig. 3 is a left side view of a tractor equipped with the proposed device. 4 is a partially sectional left side view showing the main parts of the present device, and FIG. 4 is a front sectional view showing the main parts of the present device. 2... Front wheel, 3... Rear wheel, 4... Clutch housing, 10... Clutch pedal, 13... Clutch drive arm, 15... Clutch brake drive lever, 1
6... Clutch brake drive arm, 19... Camshaft, 19b... Tapered cam surface, 22... Cam bolt, 25... Brake assembly, 27... Belt attachment part, 28... Drive Plate, 31... Brake belt, 33... Drive shaft.

Claims (1)

[Scope of utility model registration request] a clutch brake drive lever that comes into contact with the back surface of the foot part of the clutch pedal and rotates when the clutch pedal is depressed;
A brake assembly configured to brake a drive shaft whose transmission is cut off when the clutch is disengaged; a camshaft connected to the clutch-brake drive lever and having a tapered surface at one end; A drive shaft braking device for a tractor or the like, comprising a cam bolt that drives the brake assembly by rotation of the shaft.