JP2831623B2 - Swivel lever grip for construction machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grip attached to a tip of a turning lever which is turned to instruct turning of an upper turning body of a construction machine, and more particularly to a grip for controlling an engine speed. The present invention relates to a device having an operation member.

[0002]

2. Description of the Related Art A rotary grip for controlling an engine speed is disclosed, for example, in Japanese Utility Model Laid-Open Publication No. 61-145849. As shown in FIG. 6, this has a cylindrical grip body 51 rotatably supported by a fixed portion 61, and the amount of rotation of the grip body 51 is detected by a potentiometer 52 and not shown. Input to the controller. The controller drives the control lever of the engine governor by a motor according to the input rotation amount, and controls the engine speed. Further, a grip of this type is also known which is attached to the tip of a turning lever which is turned to instruct turning of the upper turning body.

[0003]

However, since the grip shown in FIG. 6 described above has a configuration in which the entire outer periphery of the grip (grip body 51) can be rotated, the grip is attached to the tip of the turning lever, and the grip body 51 is mounted. , The grip body 51 is erroneously rotated at that time, and the engine speed may be undesirably changed. Conversely, if the grip body 51 is gripped and rotated to change the engine speed, the swivel lever is accidentally rotated when twisting the wrist, and undesired turning is performed. There is also a possibility that it will. Further, in order to be able to operate, for example, a turning alarm switch or a turning brake switch without moving a hand from the grip, it is conceivable to mount these switches on the upper surface or the outer peripheral surface of the grip body 51, as shown in FIG. In the above configuration, since the grip body 51 constitutes a rotary operation member, it becomes necessary to use a slip ring or the like in order to accurately transmit a switch signal at any rotational position, resulting in an increase in the number of parts and an increase in cost. .

[0004] It is an object of the present invention to make it difficult to operate one of a turning operation and an engine speed changing operation when the other operation is being performed, and to mount a turning alarm switch or a turning brake switch on a grip. Another object of the present invention is to provide a swing lever grip of a construction machine capable of transmitting a signal without using a slip ring or the like.

[0005]

FIG. 1 shows an embodiment of the present invention.
The turning lever grip of the construction machine according to the first aspect of the present invention includes a grip main body 21 that is provided so as not to rotate with respect to the turning lever 10 for commanding the turning of the turning body, and an engine rotation. A rotation operation member 22 that can be rotated with respect to the grip body 21 to adjust the number,
Swivel brake switch 2 provided on grip body 21
8 to solve the above problem. In the invention of claim 2, the rotation operation member 22 is provided on the top of the grip body 21. According to the invention of claim 3, the grip body 21 includes a flange (collar) portion 21a (FIG. 2) and a
And a grip portion provided on the upper portion of the rotary operation member 22.
Is provided at the top of the grip portion. According to a fourth aspect of the present invention, the turning brake switch is provided on the grip portion. In the invention of claim 5, the grip body 21 is provided with a turning alarm switch 123 (FIG. 5). Claim 6
As shown in FIG. 5, for example, the turning lever grip of the construction machine according to the present invention is provided with a flange portion that is not rotatable with respect to the turning lever 10, and is provided on the upper portion of the flange portion to adjust the engine speed. A rotation operation member 122 that can be rotated with respect to the rotation lever 10, an upper member 121 provided above the rotation operation member 122 so as not to rotate with respect to the rotation lever 10, and a rotation provided on the upper member 121. And a brake switch 28. Claim 7
In the invention, the turning alarm switch 123 is provided on the upper member 121.

[0007] In the section of the means for solving the above-mentioned problems, which explains the configuration of the present invention, the drawings of the embodiments are used to facilitate understanding of the present invention. However, the present invention is not limited to this.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a diagram showing a configuration of a crane engine speed control device, for example. 1 is a governor of the engine, and 2 is a control lever thereof. As is well known, the number of revolutions of the engine is controlled in accordance with the rotational position of the control lever 2. The control lever 2 is connected to a stepping motor 5 via a link 3 and a rod 4 in this order.
The control lever 2 is rotated in accordance with the rotation of the motor 5. Reference numeral 6 denotes a motor driver for driving and controlling the motor 5, and the motor driver 6 is connected to a controller 7. The controller 7 is also connected to a potentiometer 25 (described in detail later) in the grip 20. This grip 20 is shown in FIG.
Is attached to the tip of a turning lever 10 installed in the driver's seat (provided on the upper turning body) shown in FIG.

FIG. 1 is an external view of the grip 20, and FIG.
(A) is a longitudinal sectional view thereof, and (b) of FIG.
It is a sectional view taken on line b. Reference numeral 31 denotes a joint which is non-rotatably attached to the tip of the swivel lever 10. Screw 32.
Therefore, the grip body 21 cannot rotate with respect to the joint 31, that is, the swiveling lever 10. On the upper portion of the grip body 21, a rotation operation member 22 is attached via a ball plunger 23 so as to be rotatable around the axis X of the grip body 21. Reference numeral 24 denotes a pipe inserted into the grip body 21, the upper end of which is fitted into the recess of the rotary operation member 22. By inserting a knock pin into a knock pin hole 24 a formed in the pipe 24 and a knock pin hole (not shown) formed in the rotary operation member 22, the pipe 24 rotates integrally with the rotary operation member 22.

In the upper peripheral surface of the pipe 24, a circumferentially extending groove 24b is formed at an angle of about 90 degrees, into which the tip of a pin 29 penetrating through the pin hole 21b of the grip body 21 is inserted. . As a result, the pipe 24, that is, the rotary operation member 22, is rotatable within a range of about 90 degrees, and further rotation is prevented. Reference numeral 27 denotes a cylindrical body which is non-rotatably fitted to the lower end of the pipe 24, and has a vertical groove 27a formed on its peripheral surface. Reference numeral 25 denotes a potentiometer fitted and fixed to the upper part of the joint 31, and a shaft member 26 attached to the potentiometer shaft 25a.
Is inserted into the groove 27a of the tubular body 27. Therefore, the potentiometer shaft 25a rotates integrally with the cylindrical body 27, that is, the pipe 24 via the shaft member 26,
A signal corresponding to the rotation amount is input from the potentiometer 25 to the controller 7. Reference numeral 28 in FIG. 1 denotes a turning brake switch (not shown in FIG. 2) provided on the outer peripheral surface of the grip body 21. When the turning brake switch 28 is operated, the turning brake device is operated, whereby it is possible to prevent the upper turning body from undesirably turning due to its own weight, for example, on a slope.

Next, the operation of the embodiment will be described. For example, as shown in FIG. 4, when the turning lever 10 is turned from the neutral position N to the right turning position R by gripping the grip 20, a turning hydraulic motor (not shown) rotates in a predetermined direction,
The upper rotating body rotates rightward. When the turning lever 10 is turned to the left turning position L, the upper turning body similarly turns to the left. On the other hand, when the rotation operation member 22 of the grip 20 is rotated around the axis X in FIG. 2, the potentiometer 25 detects the rotation amount and inputs it to the controller 7, and the controller 7 responds to the rotation amount. The motor 5 is driven via the motor driver 6. As a result, the control lever 2 of the governor 1 is rotated via the rod 4 and the link 3, and the engine speed changes. That is, the engine speed is controlled according to the operation of the rotation operation member 22.

Since the grip body 21 cannot be rotated, the grip body 21 is grasped and the turning lever 10 is held.
If the rotation operation is performed, there is no possibility that the rotation operation member 22 is erroneously rotated, and the engine speed does not undesirably change. In addition, if the rotation operation of the rotation operation member 22 is performed using the thumb and the index finger while gripping the grip body 21, there is no danger of turning the rotation lever 10 by mistake because the wrist is not twisted. ,
There is no undesired turning. Further, since the grip body 21 does not rotate, as described above, the grip body 2
Even in the case where the turning brake switch 27 is provided on the surface of the device 1, the signal can be transmitted without using a slip ring or the like.

In the above description, an example in which the rotary operation member 22 is provided on the upper portion of the grip body 21 has been described. However, as shown in FIG. 5, for example, a ring-shaped rotary operation member 122 is provided on the lower portion of the non-rotatable grip body 121. May be rotatably fitted. In this case, the same effect as described above can be obtained by operating the rotation operation member 22 with, for example, a little finger while holding the grip body 121. In this case, the switch 123 is also provided on the upper surface of the grip body 121.
(E.g., a turning alarm switch), and the signal can be transmitted without using a slip ring.

[0014]

As described above, according to the present invention, the grip body is non-rotatably mounted on the swivel lever, and the rotary operation member is rotatably supported on the grip body. Eliminates the possibility of accidentally rotating the rotation operating member when rotating the rotation lever while holding the main body, and accidentally rotating the rotation lever when rotating the rotation operation member And undesired operations can be prevented. In addition, since the turning brake switch is provided on the non-rotatable grip body, it is not necessary to use a slip ring for transmitting signals, and the number of parts and cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an external view showing an embodiment of a turning lever grip of a construction machine according to the present invention.

FIG. 2 is a diagram showing an internal configuration of the grip,
(A) is a longitudinal sectional view, (b) is the bb line sectional view.

FIG. 3 is a configuration diagram illustrating an example of an engine speed control device.

FIG. 4 is a diagram illustrating the operation of a turning lever.

FIG. 5 is a view showing a grip according to another embodiment.

FIG. 6 is a cross-sectional view showing a configuration of a conventional grip.

[Explanation of symbols]

 Reference Signs List 1 governor 2 control lever 5 motor 6 motor driver 7 controller 10 turning lever 20 grip 21, 121 grip body 22, 122 rotation operating member 24 pipe 25 potentiometer 28 turning brake switch 123 turning alarm switch

Claims (7)

(57) [Claims] A grip body provided so as not to be rotatable with respect to a swing lever for commanding a swing of the swing body; a rotation operation member operable to rotate with respect to the grip body to adjust an engine speed. A swing lever grip for a construction machine, comprising: a swing brake switch provided on the grip body. 2. The swiveling lever grip of a construction machine according to claim 1, wherein the rotation operating member is provided on a top of the grip body. 3. The grip body according to claim 2, wherein the grip body has a flange portion and a grip portion provided on an upper portion of the flange portion, and the rotary operation member is provided on a top portion of the grip portion. Item 3. A turning lever grip for a construction machine according to item 2. 4. The swing lever grip for a construction machine according to claim 3, wherein the swing brake switch is provided on the grip portion. 5. The turning lever grip for a construction machine according to claim 1, wherein a turning alarm switch is provided on the grip body. 6. A collar provided so as not to be rotatable with respect to the swivel lever, and a rotary operation member provided at an upper portion of the collar and rotatable with respect to the swivel lever to adjust an engine speed. A turning lever grip for a construction machine, comprising: an upper member provided above the rotary operation member so as not to rotate with respect to the turning lever; and a turning brake switch provided on the upper member. . 7. The turning lever grip of a construction machine according to claim 6, wherein a turning alarm switch is provided on the upper member.