JPH0215141Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an operating device used for response systems in various types of equipment, vehicles, and ships, such as operating a carburetor or hydraulic cylinder in a construction machine such as a power shovel.

<Prior art> Conventional operating devices of this type include, for example, the
There is a "lever mechanism locking device" proposed in Japanese Patent No. 56-30911.

The structure of this device is such that the first lock pin is pressed against the outer peripheral surface of the lock plate by a spring force, and the second lock pin is pressed against the inner peripheral surface of the lock plate through the lock member, so that the lock plate is clamped by both lock pins. It has a mechanical structure that locks it.

<Problems to be Solved by the Invention> However, in the conventional device described above, since "braking force" equals "spring force," the spring force is also limited to a strong one in order to obtain the required braking force.

In order to release the brake, a force exceeding the spring force is required, and the lever operation is generally difficult.

The present invention was developed in view of the above circumstances, and provides an operating device that can obtain necessary and sufficient braking force with a weak spring force, can release the brake with a force lower than the spring force, and can be operated easily with a lever. It is in.

<Means for solving the problem> The means taken by the present invention to achieve the above-mentioned technical problem is that the operating lever 3 is attached to the lever base 1 having the drum 2 so as to be swingable coaxially with the drum 2. The brake shoe 4 is mounted on the operating lever 3 so as to face the inner surface of the drum 2, and the brake camshaft 5 is rotated to rotate the brake shoe 4 against the drum 2. The actuating rod 7 is connected via a link 15 to a brake lever 6 which is provided to move toward and away from the brake camshaft 5 and can swing together with the brake camshaft 5. A connecting pin 16 between the brake lever 6 and the link 15
Interlocking is performed in such a manner that the axis is located at the right-angled apex of a roughly right-angled triangle formed by the swing axis of the brake lever 6, that is, the brake cam shaft 5 axis, and the axis of the connecting pin 17 of the operating rod 7 and link 15. A push spring 8 that can press the brake shoe 4 against the drum 2 through the operating rod 7 is interlocked with the operating rod 7, and a push button 18 on the side of the grip portion 13 of the operating lever 3 is connected to the operating rod 7. It is characterized by a structure in which an operating element 9 having a lift lever 19 that swings in response to the backward motion and operates the operating rod 7 against a push spring 8 is interlocked with the operating element 9.

<Function> When the operating element is not operated, the brake shoe is in pressure contact with the drum due to the increased and loaded push spring pressure through the brake camshaft, brake lever, link, and operating rod, and the brake shoe is in pressure contact with the drum due to the increased and loaded push spring pressure. The lever remains brake locked in the stopped state.

When the push button is pressed and the lift lever is swung, the brake shoe moving through the operating element, operating rod, link, brake lever, and brake camshaft is increased through the brake lever and link. It operates in response to the operating force, moves away from the drum, releases the brake lock, and the operating lever becomes freely swingable.

As a result, the operating lever can be easily operated, finely adjusted to a desired swing angle position, and stopped and locked at the same position.

<Example> An example of implementation of the present invention will be described in detail below with reference to the drawings.

A in the figure is an operating device, and this operating device A has a control lever 3 pivotally attached to a shaft portion 10 of a lever base 1 so as to be able to freely swing, and a pair of operating devices arranged front and rear in the swinging direction of the swinging lever 3. The stopper 11 changes the swing angle range of the operating lever 3 from one position a to the other position b.
The brake lock element A1 of the operating lever 3 is provided.

The brake lock element A1 has a drum 2 integrally molded on a lever base 1 coaxially with a shaft portion 10, and a brake shoe 4 is provided on the operating lever 3 so as to face the inner surface of the drum 2 with a support shaft 12. drum 2
On the other hand, when the operating element 9 in the grip portion 13 at the upper end of the operating lever 3 is not operated, the brake shoe 4 presses against the tension spring 14 to lock the operating lever 3 in a stopped state, and the operating element 9 During operation, the drum 2 is pulled by the tension spring 14.
The operating lever 3 is located away from the operating lever 3 so as not to interfere with the swinging movement of the operating lever 3.

The brake camshaft 5 is provided on an extended line extending from the grip portion 13 through the shaft portion 10 in conjunction with the brake shoe 4, and the rotation of the camshaft 5 causes the brake shoe 4 to move toward and away from the drum 2. I try to do that.

A brake lever 6 integrated with the brake camshaft 5 is interlocked with an operating rod 7 leading to an operating element 9 via a link 15.
The brake shaft 4 is rotated by the brake camshaft 5 which swings clockwise in response to pressure and rotates in the same direction.
can be pressed against the drum 2, and as the operating rod 7 is pulled up against the push spring 8, it swings counterclockwise, and the brake shoe 4 is moved away from the drum 2 by the pressure of the tension spring 14. That's what I do.

The interlocking relationship between the brake lever 6 and the link 15 is such that the axis of the connecting pin 16 of the two is the oscillating axis of the brake lever 6, that is, the axis of the brake camshaft 5, and the axis of the connecting pin 17 of the operating rod 7 and the link 15. The pressure spring 8 has a weak spring pressure or the operating element 9
While allowing the brake lever 6 to swing with a light operating force, the link 15 acts as a protruding rod to prevent the brake lever 6 from swinging counterclockwise, thereby ensuring the brake is locked and the operating element 9 This makes unlocking operations easier.

The actuating rod 7 is passed through the cylindrical portion 3a of the operating lever 3 and is hidden, thereby allowing the operating element 9 and the link 15 to communicate with each other in an interlocking manner.

Further, the operating rod 7 is interlocked with an auxiliary link 15a arranged symmetrically with the link 15, so that the bending stress acting on the operating rod 7 through the link 15 when the brake lever 6 swings and when the brake is locked is substantially reduced. I'm trying to resolve it.

The push spring 8 is built in the cylindrical portion 3a and is attached to the operating rod 7.
The spring force biases the brake shoe 4 through the operating rod 7 to the brake lock state where the brake shoe 4 is pressed against the drum.

The contact element 9 is provided with a push button 18 on the side surface of the grip part 13 to make it easy to press with the finger of the hand holding the grip part 13 in order to swing the operation lever 3. The upper end of the operating rod 7 is integrally connected to the lift lever 19 that is in contact with the rear end, so that as the push button 18 is pushed, the lift lever 19 swings and the operating rod 7 is activated by a push spring. The push button 18 is pulled up against the pressure of 8, and the brake lock by the push spring 8 can be released even with a pushing force of the push button 18 that is lower than the spring force of the push spring 8.

As a result, one position a of the operating lever 3 is set to the stop state of the engine, for example, in such a manner that the engine's carburetor (not shown) is connected to the connecting portion 20 at the lower end of the operating lever 3 in an interlocking manner via the control cable 21. When the operating lever 3 is automatically locked in one position a by the brake locking element A1, the push button 18 is pressed to release the brake lock and swing it to the other position c (see Fig. 3). ), and by releasing the push button 18 at the desired swing angle, for example at the idling position c, to lock the brake (Fig. 1), the engine output can be controlled steplessly from the engine stop state to the idling state to the maximum output state. It is.

<Effect of the idea> Therefore, the present invention has the following advantages.

To securely lock the brake with a necessary and sufficient force exceeding a spring force, and to surely release the brake lock by pressing a push button with a pushing force lower than the spring force, and lever operation is light, easy to handle, and useful.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the operating device of the present invention. FIG. 2 is a longitudinal sectional view taken along the - line. FIG. 3 is a side view with the brake unlocked and the swing lever swung to the other position. In the figure, a is one position, b is the other position, 1 is the lever base, 2 is the drum, 3 is the operating lever, 4 is the drum shoe, 5 is the brake camshaft, 6 is the brake lever, 7 is the operating rod, and 8 is the pusher. Spring, 9 is an operating element, 15 is a link, 16, 17 is a connecting pin, 18
is the push button, and 19 is the lift lever.

Claims (1)

[Scope of utility model registration request] An operating lever 3 is pivotally supported coaxially with the drum 2 on a lever base 1 having a drum 2, and a brake shoe 4 is provided on the operating lever 3 so as to face the inner surface of the drum 2, and a brake cam shaft 5 is provided on the operating lever 3. is provided so that the brake shoe 4 moves toward and away from the drum 2 in response to the rotation of the camshaft 5, and is connected to a brake lever 6, which can swing integrally with the brake camshaft 5, via a link 15. The operating rod 7 is configured such that the axial center of the connecting pin 16 between the brake lever 6 and the link 15 is the swing axis of the brake lever 6, that is, the axial center of the brake cam shaft 5, and the axial center of the connecting pin 17 of the operating rod 7 and the link 15. The operating rod 7
A push spring 8 that can press the brake shoe 4 against the drum 2 through the same operating rod 7 is interlocked with the push spring 8.
In addition, a grip portion 13 of the operating lever 3 is attached to the operating rod 7.
An operating device that is interlocked with an operating element 9 having a lift lever 19 that swings in response to the retreat of a push button 18 on the side to push an operating rod 7 and operate against a spring 8.