JPH0436016Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a multidirectional controller using potentiometers, microswitches, and cam switches.

[Conventional technology]

When operating an electric truck, hydraulic excavator, crane, etc., a multidirectional controller is often used to control the direction with a single lever handle. This multi-directional controller operates X and Y potentiometers, micro switches, cam switches, etc. by rotating the lever handle in the X and Y directions using a universal joint.

[Problem that the invention attempts to solve]

In this way, multi-directional controllers are structured so that they can be operated by freely moving one lever handle, so conversely, if you want to move the lever handle linearly from one direction to another, is difficult to operate. That is, since the handle of the multidirectional controller is operated by human touch, linear operation is difficult and results in a meandering operation. For this reason, the operated bogies and shovel cars operate in a meandering manner.

This meandering operation poses a problem in that the machine does not move in a straight line when operating the machine, so it does not proceed in the expected direction and is therefore dangerous.

As a countermeasure to this problem, computer software is used to perform a correction that creates a dead zone in the operation even if there is some meandering operation. However, such a correction method using a computer has the problem of complicating the configuration and increasing costs.

The present invention was devised in view of these conventional problems, and aims to prevent meandering operation with a simple and inexpensive structure.

[Means for solving problems]

In order to achieve this purpose, the multi-directional controller of the present invention has a conical cylindrical return seat at the other end of a return spring whose end is locked in the middle of the lever handle in the longitudinal direction. It is characterized in that a guide groove that is movably fitted and guides the edge of the return seat is provided on the sliding surface between the end face of the return seat and the mechanism case.

〔Example〕

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings. FIG. 1 is a sectional view of an embodiment of a multidirectional controller according to the present invention. In this figure, 1 and 2 are mechanism cases, and 3 is a lever handle. The lever handle 3 is attached to the mechanism case 2
Inside, it is supported by a ball bearing 4 so as to be rotatable in all directions: front and back, left and right, and the composite direction thereof. The base end of the lever handle 3 is arranged in the X direction (first
It is loosely fitted into elongated holes 5a and 6a provided in the arm 5 (in the left and right rotation directions in the figure) and the arm 6 in the Y direction (also in the front and rear directions), respectively, so as to be perpendicular to each other.

That is, when the lever handle 3 is moved in the left-right direction, the base end of the lever handle 3 comes into contact with the side wall of the elongated hole 5a of the X-direction arm 5, and the X-direction arm 5 is moved in the left-right direction around the ball bearing 4. Rotate it. At this time, the base end of the lever handle 3 is
Since the direction arm 6 moves along the longitudinal direction of the elongated hole 6a, the Y direction arm 6 does not rotate.

When the lever handle 3 is moved forward and backward,
Contrary to the previous case, the Y-direction arm rotates. Y
A base end portion of a partial gear 7 is attached to the end of the central axis of the directional arm 6, and a shaft 8 of a potentiometer 8 is attached to a gear portion 7a at the tip of the partial gear 7.
The gears 9 attached to a are configured to mesh with each other. A cam mounting plate 10 is attached to the other end of the central axis of the Y-direction arm 6, and a cam 11 is fixed to the tip thereof. This cam 11 works together with an actuator 13 of a series of micro-switches 12 fixed to the mechanism case 2, and operates the micro-switch 12 according to the rotation angle when the Y-direction arm 6 rotates. It is configured as follows. Note that a partial gear and a cam mounting plate are also attached to the central axis of the X-direction arm 5, but they are not shown in FIG. 1 due to the drawing method. The lever handle 3 has a retaining ring 14 at the - end.
A spring 15 is installed, which is locked at
A return seat 16 is attached to the other end of the spring 15. This spring 15 and return seat 1
6 is for holding the lever handle 3 in a neutral state, and when the return seat 16 presses the upper surface of the mechanism case 1, the repulsive force is used to hold the lever handle 3 in a neutral state. There is. In the figure, 17 is a bellows rubber cover for waterproofing and dustproofing, 18 is a push button attached to the tip of the lever handle 3 for issuing an alarm, etc., and 19 is a push button switch.

The present invention is characterized in that the mechanism case 1 is provided with a groove 1a for guiding the return seat 16. That is, when operating the lever handle 3, the lower end peripheral edge of the return seat 16 comes into pressure contact with the mechanism case 1 by the biasing force of the spring 15, but by providing the groove 1a, the lever handle 3 can be moved in the X direction. When operating the lever handle 3 to an intermediate position in the Y direction, there may be a case where the lever handle 3 is operated in a straight line, so in that case, as shown in Figure 3, a groove 1b inclined at 45 degrees may be provided.

When the inclined lower end of the return seat 16 is moving along the groove 1a during operation, the force opposing the biasing force of the spring 15 is minimal.
The lever handle 3 will move along the direction in which the groove 1a is formed.

Figure 2 is a plan view of the mechanism case 1 in which the groove 1a is formed. The shaded area is the groove 1a.

Depending on the design, operating the lever handle 3 at an intermediate position between the X and Y directions may result in a straight-line operation. A groove 1b may be provided.

[Effect of idea]

As explained above, in the present invention, a groove is formed in the mechanism case to guide the movement of the return seat. As a result, when the lever handle is operated in the straight driving direction, the lever handle is guided along the direction in which the groove is formed, so that the meandering operation does not occur and an accurate linear operation can be performed.

In this way, according to the present invention, meandering operation can be prevented with a simple structure, complicated design of computer software, etc. is not required, and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and Figures 2 and 3 are plan views of a mechanism case in which grooves are formed according to the present invention. 1, 2... Mechanism case, 3... Lever handle, 4... Ball bearing, 5... X direction arm, 6...
Y direction arm, 5a, 6a... Long hole, 7... Partial gear, 7a... Gear part, 8... Potentiometer, 8a... Shaft, 9... Gear, 10... Cam mounting plate, 11... ...Cam, 12...Micro switch,
13...actuator, 14...retaining ring, 15
... Spring, 16 ... Return seat, 17 ... Bellows rubber cover, 18 ... Push button, 19 ... Push button switch.

Claims (1)

[Scope of utility model registration request] A conical cylindrical return seat is fitted onto the other end of the return spring whose end is locked in the middle of the lever handle in the longitudinal direction, so that the return seat is movable in the longitudinal direction of the lever handle. A multi-directional controller characterized in that a guide groove for guiding an edge of the return seat is provided on a sliding surface with a mechanism case.