JPS5842695Y2 - control valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control valve device, and more particularly to a control valve device including a control valve portion and an elastic neutral return portion.

Conventionally, this type of control valve device has an elastic neutral return section arranged in series at one longitudinal end of a control valve section.

For this reason, the longitudinal length of the control valve device becomes long, and when it is attached to a mechanical device, the installation space becomes longer in the longitudinal direction, which imposes restrictions on its attachment and also limits the external design of the mechanical device. It has defects such as damage.

The purpose of the invention is to shorten the length in the longitudinal direction by arranging the control valve part and the elastic neutral return part in parallel, and to shorten the space in the longitudinal direction when attaching it to a mechanical device, thereby limiting the installation. The purpose is to prevent damage to the exterior design of machinery and equipment.

A longitudinal intermediate portion of the link lever and an operating lever are connected to the pivot shaft, so that the operating lever can swing the link lever about the pivot shaft, and a control valve portion and a control valve are provided at both ends of the link lever. An elastic neutral return portion is provided with a connecting rod that is held in place by a spring and is slidable in the longitudinal direction against the spring force, and one end of the connecting lever is connected to the spool valve body of the control portion. and a detent that pivotally connects the connecting rod of the elastic neutral return portion and the other end of the connecting lever, and holds the connecting rod in a sliding position against a spring force. A mechanism is provided so that the spool valve body of the control valve section can be returned to the neutral position by the connecting rod of the elastic neutral return section via the connecting lever.

Embodiments of the present invention will be described below with reference to the drawings.

A control valve device 11 is constructed by having a control valve portion 13 and an elastic neutral return portion 15 including a detent mechanism 14 fixed in parallel in a direction orthogonal to the longitudinal direction on a case frame 10 of a mechanical device main body (not shown). The control valve section 13 and the elastic neutral return section 15 are covered with an exterior plate member 12 fixed to the case frame 10.

The control valve part 13 is a conventionally known one, and the spool valve body 1
6 is used for supplying and discharging pressurized fluid to hydraulically operated parts in mechanical equipment.

11 is a control link for shifting the spool valve body 16, and a pivot lever 19 and a link lever 20 are spline-coupled to a pivot shaft 18 rotatably pivoted to the case frame 10. 19 to a manual operation section (not shown), and a two-pronged joint member 24 in which a continuous pin 21 protruding from one end of a link lever 20 is fixed to the spool valve body 16.
The continuous rod 2 of the elastic neutral return portion 15 is connected to the continuous movement pin 22 which is fitted and connected to the continuous movement lever 20 and protrudes from the other end of the continuous movement lever 20.
It has a structure in which it is fitted and connected to a two-pronged joint member 25 fixedly installed at 3.

The elastic neutral return portion 15 is constructed as follows.

That is, the cap member 28' is fixed to the cylindrical body 27 to constitute the chamber 31, and the connecting rod 23 is attached to the cap member 2.
A pair of washers 28.
29, fix the sleeve 33 to the tip of the connecting rod 23 with the bolt 34, and attach the pair of washers 28°2.
An elastic spring 30 is provided between 9 to urge one washer 28 into contact with the sleeve 33 and the other washer 29 into contact with the stepped shoulder 35, respectively.

Further, one washer 28 comes into contact with a stepped shoulder 32 formed in the hole 31' of the cylindrical body 27 and is prevented from moving to the left, and the other washer 29 comes into contact with the cap member 28' and moves to the right. is prevented from moving, and the distal end surface 48 of the cylindrical body 27 is prevented from moving.
It comes in contact with and is prevented from moving to the left.

Further, the detent mechanism 14 includes an annular protuberance 36 formed on the sleeve 33 and a plurality of steel balls 37, 38 pressed against the sleeve 33.
．． 40 and is biased by a valve piece 42.43 located within the enclosure 44.45 and biased by a spring 41.

46°4γ is a nut piece.

Next, the operation will be explained.

In the illustrated state, the connecting rod 23 is in the neutral position, and the connecting rod 23 is elastically maintained at the illustrated position N by the pair of washers 28 and 29 and the elastic spring 30, and the spool valve body 16 is in the neutral position.
0, the control valve section 13 is elastically maintained at the neutral position.

From this state, when the pivot lever 19 is rotated downward to the normal rotation position ■, the pivot shaft 18 rotates clockwise, and the continuous firing pin 21,
At the same time, the spool valve body 16 is brought to the forward rotation position (■) via the forked joint member 24, and the continuous firing pin 22 and the forked joint member 25
The connecting rod 23 is moved to the left via .

This amount of movement is regulated until the other washer 29 moves to the left against the elastic spring 30 and comes into contact with the tip surface 48, so the spool valve body 16 can be accurately shifted to the forward rotation position I.

Further, when the pivot lever 19 is rotated upward to the reverse position (2) and the brake OFF position (2), the spool valve body 16 is accurately set to the reverse position (2) and the brake OFF position (3) in the same way as described above.

Note that when the reverse position (■) is reached, the annular protuberance 36 of the sleeve 33 contacts the steel balls 37 and 38 to determine the position, and when the brake is turned off (■), the annular protuberance 36 of the sleeve 33
6 pushes up the steel balls 37 and 38 and moves further to the right, and the washers 28 and 29 are brought into contact and positioned, and are held in that position by the annular ridge 36 and the steel balls 37 and 38.

Since the present invention is configured as described above, the longitudinal length of the control valve device can be shortened.

Therefore, the attached sprue can be shortened and the external design can be improved.

Further, when the operating lever 19 swings the linking lever 20 and sliding the spool valve body 16, the linking rod 23 slides from a predetermined position against the spring force and is held at that position by the detent mechanism 14. be done.

Therefore, once the operating lever 19 is operated, the spool valve body 16 can be held at the moved position, and there is no need to continue operating the operating lever 19, which simplifies the operation.

Furthermore, when the operating lever 19 is operated to swing the linking lever 20 in the opposite direction, the linking rod 23 is moved against the holding force of the detent mechanism 14, and thereafter the linking rod 23 is held in a predetermined position by the spring force. Since it returns, the linkage lever 20 reliably returns to the initial position, and the spool valve body 16 can be moved and returned to the initial position.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view;
FIG. 2 is a side view, and FIG. 3 is a front view. 13 is a control valve part, 15 is an elastic neutral return part, and 17 is a control link.

Claims (1)

[Scope of utility model registration request] The longitudinal intermediate portion of the link lever 20 and the operating lever 19 are connected to the pivot shaft 18 so that the link lever 20 can be swung about the pivot shaft 18 by the operating lever 19. A control valve part 13 and an elastic neutral return part 15 each having a connecting rod 23 held in a predetermined position by a spring and slidable in the longitudinal direction against the force of the spring are disposed, and the control valve part 13 The spool valve body 16 and one end of the link lever 20 are pivotally connected, and the link rod 23 of the elastic neutral return portion 15 and the other end of the link lever 20 are pivotally connected, and the link rod 23 1. A control valve device comprising a detent mechanism 14 for holding the valve in a slid position against a spring force.