JPH0329662Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an axial movement positioning device for a moving member. Specifically, a hydraulic control valve that controls the hydraulic pressure used as a drive source for a hydraulically operated device such as a dump truck as a moving member can be used as a detent mechanism that positions the moving member in the axial direction.

[Prior art] Japanese Unexamined Patent Application Publication No. 137610/1983, Utility Model Application Publication No. 1983-137610
56274, Japanese Patent Laid-Open No. 61-46723, etc., disclose an axial movement positioning device for a moving member (generally referred to as a detent mechanism).

As shown in FIGS. 10, 11, and 12, the disclosed conventional axial movement positioning device for a moving member includes a guide member 1 having a guide hole 11, and a guide member 1 provided with a guide hole 11. a moving member 2 held movably in the axial direction, a guide member 1 and a moving member 2;
At least two or more annular positioning grooves 3 formed in either one of the guide member 1 or the moving member 2, and a positioning member that is held by the other of the guide member 1 and the moving member 2 and is biased in the radial direction and is detachable from each annular positioning groove 3. Ball 4
It is composed of. This moving member axial movement positioning device moves the moving member 2 to a predetermined position in the axial direction, or positions and holds the moving member 2 between two fixed positions. Further, the moving member 2 may be used as a means for controlling the operating position of the pressure fluid control valve by indirectly connecting the pressure fluid control valve to one end of the shaft or to the pressure fluid control valve integrally formed on the shaft thereof. It is being Thereby, the opening degree of the pressure fluid control valve is controlled by moving the moving member 2 in the axial direction.

[Problems to be solved by the invention] In the conventional axial movement positioning device for a moving member, either one of the guide member 1 and the moving member 2 has a structure that allows the moving member 2 to come to rest at a plurality of locations in the axial direction. A plurality of annular positioning grooves 3 are formed. When the movable member 2 is finely adjusted in the axial direction between a position where the positioning ball 4 engages with one of the plurality of annular positioning grooves 3 and a position where it engages with another annular positioning groove 3, for example, the annular The urging force of the positioning ball 4 engaged with the positioning groove 3 acts on the moving member 2 as movement resistance. Therefore, as the operator manually moves the movable member 2, a large operating force is required to separate the positioning ball 4 from the annular positioning groove 3.
and a positioning ball 4 that engages with the annular positioning groove 3
The moving member 2 is moved by a large operating force that resists the urging force of
move in the axial direction. Then, the movable member 2 moves the positioning ball 4, which has been disengaged from one of the annular positioning grooves 3, at once to a position where it directly engages with the other one of the annular positioning grooves 3, due to the inertial force during the movement in the axial direction. As a result, the moving member 2 cannot stand still between one of the annular positioning grooves 3 and the other, making it difficult to make fine adjustment movements. In addition, if a fluid control valve is provided on the moving member 2, it becomes difficult to finely adjust the flow rate of the pressure fluid using the fluid control valve.

That is, according to the conventional axial movement positioning device for a movable member, the movable member 2 is easily moved roughly in position unless the operator carefully controls the operating force.
This is inappropriate as a mechanism for fine adjustment movement.

SUMMARY OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide an improved structure of an axial movement positioning device for a moving member.

[Means for Solving the Problems] The axial movement positioning device for a moving member of the present invention includes a guide member provided with a guide hole, and a moving member held movably in the axial direction in the guide hole of the guide member. a member; at least two or more annular positioning grooves formed in either one of the guide member or the movable member; In an axial movement positioning device for a movable member comprising a positioning ball that can be attached to and detached from a positioning groove, either the guide member or the moving member is engaged with the positioning ball between two annular positioning grooves. The movable member is characterized by having an uneven portion that acts as a movement resistance when the movable member moves in the axial direction.

According to the configuration of the present invention, when the movable member is moved in the axial direction, movement resistance is generated by the uneven portion between the two annular positioning grooves, so the movable member slightly moves between the two annular positioning grooves. Adjustment makes it easier to move.

The axial movement positioning device for a moving member of the present invention includes a guide member, a moving member, an annular positioning groove, a positioning ball, and an uneven portion.

The guide member includes a guide hole that guides a moving member, which will be described later, in the axial direction. The guide member may have a guide hole formed directly in the base of the housing, etc., or it may be formed separately from the housing and have a cylindrical member with a guide hole connected to and isolated from the housing. You can. In short, any structure may be used as long as it includes a guide hole that can guide the moving member in the axial direction, a plurality of annular positioning grooves described later, or a positioning ball that is attached to and detached from the annular positioning grooves.

The movable member is held movably in the axial direction within the guide hole of the guide member. This moving member may be provided with a pressure fluid switching valve in the center.

The movable member may be provided with either an annular positioning groove or a positioning ball at one end thereof, and the other end thereof may be connected and held to an operating member for operating and controlling the movable member.

An intermediate portion between one end and the other end of the moving member may be configured to form a pressure fluid switching valve.

The annular positioning groove consists of at least two or more grooves formed on either the guide member or the moving member. Further, the annular positioning groove removably holds a positioning ball, which will be described later.

The positioning ball is held by the other of the guide member and the movable member, is biased in the radial direction by a spring or a cylindrical member, and is biased in the radial direction by the relative movement of the annular positioning groove in the axial direction of the movable member. It is held in a removable manner. A single positioning ball or a plurality of positioning balls may be used on the circumference in a direction perpendicular to the axial direction of the moving member.

The uneven portion is formed between the two annular positioning grooves, and engages with the positioning ball to provide movement resistance when the moving member moves in the axial direction.

The uneven portion can be formed by narrow grooves arranged in parallel and narrower than the annular positioning groove.

It is preferable that the narrow groove is a spiral groove.
In this case, it is suitable for mass production. It is preferable that the width of the narrow groove is 1/2 or less of the diameter of the positioning ball.

[Operation] The axial movement positioning device for a moving member of the present invention engages a positioning ball between at least two or more annular positioning grooves formed in either the guide member or the moving member, and moves the moving member. This structure has uneven portions that act as movement resistance during axial movement.

Therefore, the movable member is held by the guide member, and the two
When a positioning ball radially biased is engaged with one of the annular positioning grooves and moved in the axial direction between the other annular positioning grooves, the positioning ball moves into the uneven surface. comes into contact with. In addition, the positioning ball and the uneven portion move relative to each other in the axial direction of the moving member while being in contact with each other. The contact friction between the positioning ball and the uneven portion during relative movement generates movement resistance in the moving member. This movement resistance is sensed by an operator manipulating the moving member. This saves the movement operation force for the moving member, and facilitates fine adjustment movement of the moving member in the axial direction.

[Embodiments] (First embodiment) Fig. 1 showing a cross section of the first embodiment of the axial movement positioning device for a moving member of the present invention, and Figs. 2 and 2 showing a partially enlarged view of Fig. 1. Moving member 2 in
The explanation will be given based on FIG. 3 showing the operating state of.

In this first embodiment, the moving member is connected to a pump housing 8 having a pump gear 80 driven by a PTO (power take-off) device that extracts power from an engine of a vehicle as an axial movement positioning device for a moving member. A case is shown in which the control valve housing 9 is incorporated into a control valve housing 9 having a control valve section for switching the flow of hydraulic oil.

Further, an upper fluid port 91 connected to a piston chamber of a hoist cylinder (not shown) and a lower fluid port 92 similarly connected to a lower piston chamber of the hoist cylinder are formed in the control valve housing 9.

The axial movement positioning device of the moving member of the first embodiment can be attached to and detached from the guide member 1, the moving member 2, the three annular positioning grooves 3a, 3b, and 3c, and the annular positioning grooves 3a, 3b, and 3c. positioning ball 4
a, 4b, and an uneven portion 5. In this embodiment, two or more annular positioning grooves are formed on the guide member 1 side, and a positioning ball is held on the movable member 2 side.

The guide member 1 includes a cylindrical base 11 and a cover part 12 that covers the outer circumference of the cylindrical base 11 and is connected to a control valve housing 9, which will be described later.
The cylindrical base 11 includes a guide hole 111 that holds a moving member 2, which will be described later, so as to be movable in the axial direction.
The inner wall portion 111a forming the guide hole 111 is provided with three annular positioning grooves 3a, 3b, and 3c at approximately equal intervals in the axial direction thereof. Note that the positions of these three annular positioning grooves 3a, 3b, and 3c correspond to the raising position, stop position, and lowering position of a cargo box tilting operating device (not shown) that is controlled via the operating member 6. has been done.

The moving member 2 is a guide portion 93 of the control valve housing 9.
The movable member 2 is held slidably in the axial direction.
The one end 20 side is held in the guide hole 111 of the guide member 1 so as to be movable in the axial direction. Further, as will be described later, positioning balls 4a and 4b are held on one end 20 side of the moving member 2, and one end 61 of the operating member 6 for operating and controlling the moving member 2 is held on the other end 21 side.
It is kept connected to. Further, the moving member 2 may have a first pressure fluid switching valve 220 and a second pressure fluid switching valve 221 formed in an intermediate portion 22 between one end 20 and the other end 21. The first pressure fluid switching valve 220 and the second pressure fluid switching valve 221 can control the opening area of the upper fluid port 91 and the lower fluid port 92 of the control valve housing 9. Further, a positioning ball 4a held on the one end 20 side of the moving member 2,
4b is detachable from each of the annular positioning grooves 3a, 3b, and 3c. That is, the positioning balls 4a and 4b are arranged at both ends of the biasing member 23 accommodated in the through hole 211 of the moving member 2. Along with this, the positioning balls 4a and 4b are activated by the biasing member 23.
The outer peripheral portion of the movable member 2 is biased in the radial direction by the movable member 2, and is pressed against the inner wall portion 111a of the guide hole 111. Further, a coil spring can be used as the biasing member 23. The other end 62 of the operating member 6 is rotatable in the same direction as the one end 61 about the support shaft 63 of the oil pump housing 8, and is connected to one end 71 of the control cable 7. The other end of the control cable 7 is connected to an operation lever (not shown).

As shown in FIG. 2 and FIG.
It is formed between each of b and 3c. Further, in the first embodiment, continuous spiral narrow grooves 51 and 52 are used as the uneven portion 5. Further, the narrow grooves 51 and 52 formed in this way are used for positioning balls 4.
The groove width is less than 1/2 of the diameter of a and 4b. The uneven portion 5 engages with the positioning balls 4a and 4b between the two annular positioning grooves 3a and 3b and between the annular positioning grooves 3b and 3c, and prevents movement when the moving member 2 moves in the axial direction. It is a resistance.

Hereinafter, the operation of the axial movement positioning device for a moving member of the first embodiment configured as described above will be explained.

When moving the moving member 2 upward in FIG. 1 from the state in which the positioning balls 4a and 4b are engaged with the annular positioning groove 3b as shown in FIGS. 1 and 2, the operation lever (not shown) is operated. By doing so, the control cable 7 is moved in the direction of arrow S2. In conjunction with this, the operating member 6 rotates counterclockwise about the support shaft 63. Then, the moving member 2 interlocked with this moves in the direction of arrow S3.
As a result, the positioning balls 4a, 4b disengage from the annular positioning groove 3b, and on the way to the position where they engage with the annular positioning groove 3a, they come into contact with the uneven portion 5 as shown in FIG. 2. Generates movement resistance. Therefore, the operator can move the moving member 2.
When operated, the amount of movement in the axial direction can be sensed as movement resistance, and the amount of movement can be finely adjusted.

Further, while the moving member 2 moves from the engagement position with the annular positioning groove 3b of the positioning balls 4a, 4b to the engagement position with the annular positioning groove 3a, the uneven portion 5
The movable member 2 can be held at this position by stopping at the position where it abuts. Furthermore, by moving the moving member 2 in the S3 direction from the position where the positioning balls 4a, 4b engage with the uneven portion 5, the positioning balls 4a, 4b can be engaged with the positioning groove 3a. This allows the moving member 2 to be held at a predetermined position.

In addition, as shown in FIG. 1, the positioning balls 4a, 4
The arrow indicates the movable member 2 in the stop position of the actuating device where b is engaged with the annular positioning groove 3b.
When moving in the S4 direction, the control cable 7 is moved in the arrow S1 direction by operating an operation lever (not shown). In conjunction with this, the operating member 6 rotates clockwise about the support shaft 63. Then, the moving member 2 interlocked with this moves in the direction of arrow S4, contrary to the case described above.
As a result, while the positioning balls 4a and 4b are moving away from the annular positioning groove 3b and moving to the position where they engage with the annular positioning groove 3c, as in the previous case,
It comes into contact with the uneven portion 5 and generates movement resistance in the moving member 2.

Therefore, when the operator operates the movable member 2, the amount of movement in the axial direction can be sensed as movement resistance, and the amount of movement can be finely adjusted. Further, the movable member 2 is stopped at a position where it abuts the uneven portion 5 while moving from the engagement position with the annular positioning groove 3b of the positioning balls 4a, 4b to the engagement position with the annular positioning groove 3a. This allows the moving member 2 to be held in this position. Furthermore, positioning balls 4a,
4b engages with the uneven portion 5, move the moving member 2.
Positioning ball 4 by moving it in the S3 direction
a, 4b can be engaged with the positioning groove 3a. This allows the moving member 2 to be held at a predetermined position.

Further, in the first embodiment, spiral-shaped narrow grooves 51 and 52 are used as the uneven portion 5, so that
Either one of the positioning balls 4a, 4b can definitely be engaged with the narrow grooves 51, 52. Moreover, since the spiral-shaped narrow grooves 51 and 52 can be formed by thread cutting, productivity is good and production efficiency can be improved in mass production.

(Second Embodiment) A second embodiment will be described based on FIG. 4, which shows a side view of the device in use, and FIGS. 5, 6, and 7, which show cross-sections.

In the case of the second embodiment, a case is shown in which the axial movement positioning device for a moving member is incorporated into an operating device for a hydraulic switching valve of a dump truck or the like.

The axial movement positioning device for a moving member according to the second embodiment includes a guide member 1, a moving member 2, two annular positioning grooves 3d and 3e, and the annular positioning groove 3.
It consists of a positioning ball 4c that can be attached to and detached from d and 3e, and a concave and convex portion 5.

This second embodiment has a configuration in which a positioning ball 4 is held on the guide member 1 side, and two annular positioning grooves 3d and 3e are formed on the one end 20 side of the moving member 2.

The guide member 1 consists of a cylindrical housing 10 held at a base A, and a valve body 100 held within the cylindrical housing 10 so as to be slidable in the axial direction. The valve body 100 is provided with a guide hole 101 that holds the movable member 2, which will be removed later, so as to be movable in the axial direction. Further, a holding resist 102 is formed in the valve body 100, communicating with the guide hole 101 and holding a positioning ball 4c, which will be described later. Also, valve body 1
As shown in FIG. 4, one end 100a of the bell crank 120 is pivotally supported by the other end 122 of a bell crank 120 which is pivotally supported by a support shaft 121 in a part of the base A. One end 123 of the bell crank 120 is a hydraulic switching valve 140
The spool 130 is pivotally supported.

The moving member 2 has one end 20 held in a guide hole 101 of the valve body 100 so as to be movable in the axial direction. Further, two annular positioning grooves 3d and 3e are formed on the outer peripheral surface of the one end portion 20 at a constant interval. Further, the other end portion 21 of the moving member 2 protrudes to the outside of the valve body 100 and the cylindrical housing 10 to form an operating shaft.

Note that when the one end portion 20 of the moving member 2 moves in the direction of arrow S6 as shown in FIG. 6 and engages with the locking portion 103 of the valve body 100, the valve body 10
0 can be linked in the same direction. Further, when the one end portion 20 of the moving member 2 moves in the direction of arrow S5 as shown in FIG. 7 and engages with the inner hole end 104 of the valve body 100, the valve body 100 can be interlocked in the same direction.

The annular positioning ball 4 is held in the holding hole 102 of the valve body 100, and moves in the same direction as the valve body 100 moves through the guide hole 101.

Further, the annular positioning ball is disposed between either the inner peripheral wall 10a or the recess 10b of the cylindrical housing 10 and the moving member 2. Thereby, it is urged to come into contact with the moving member 2.

As shown in FIG. 5, the uneven portion 5 is formed on the moving member 2 between the two annular positioning grooves 3d and 3e. In the second embodiment, two parallel narrow grooves 51a and 52a, which are narrower than the annular positioning grooves 3d and 3e, are used as the uneven portion 5.
Further, the narrow grooves 51a and 52a are grooves having a width less than 1/2 of the diameter of the positioning ball 4c.

The operation of the moving member axial movement positioning device of the second embodiment configured as described above will be explained.

In order to operate the hydraulic switching valve 140, the moving member 2 is operated and moved in the guide hole 101 of the valve body 100 in the direction of arrow S5 or arrow S6 from the position shown in FIGS. 4 and 5. Then, as the positioning ball 4c moves from the position shown in FIG. 5 of the movable member 2 to the position shown in FIG. 6 or the position shown in FIG. 7, as shown in FIG. It comes into contact with either 51a or 52a. Therefore, the configuration of this second embodiment can also provide the same effects as when moving the moving member 2 of the first embodiment. The details are the same as in the first embodiment, so they will be omitted.

As described above, according to the first and second embodiments of the present invention, fine adjustment movement is possible when the movable member is moved in the axial direction with an extremely simple structure. Therefore, even if this moving member is provided with a pressure fluid switching valve or other functions for controlling performance, it is possible to finely adjust these performances. Furthermore, when such an axial movement positioning device for a moving member is used in a dump control mechanism in a dump truck, fine control can be performed, which is very useful.

[Effects] According to the configuration of the present invention, the operating feeling of the moving member axial movement positioning device is improved when the moving member moves in the axial direction, and the axial movement of the moving member becomes stable, thereby preventing malfunctions. Performance can be further improved. Furthermore, when the moving member is used in a pressure fluid switching valve or other mechanism for obtaining delicate control performance, it can sufficiently exhibit its performance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment in which the axial movement positioning device for a moving member of the present invention is incorporated into a known device. FIG. 2 is a partially enlarged view showing the main parts in FIG. 1. FIG. 3 is a partially enlarged view showing the operating state of the main parts in FIG. 2. FIG. 4 is an external view showing a second embodiment in which the axial movement positioning device for a moving member of the present invention is incorporated into a known device. . FIG. 5 is a longitudinal sectional view showing the main parts in FIG. 4. 6 and 7 are longitudinal cross-sectional views showing the operating state of the main parts in FIG. 5. FIG. 8 and 9 are partially enlarged views showing the engagement state between the positioning ball 4c and the uneven portion 5. FIG. Figure 10, Figure 11,
FIG. 12 shows a conventional configuration, and FIG. 10 is a longitudinal sectional view in comparison with FIG. 1 showing a first embodiment of the present invention. FIG. 11 is a partially enlarged view of FIG. 10. FIG. 12 is a sectional view showing a conventional configuration in comparison with FIG. 5, which also shows a second embodiment of the present invention. 1... Guide member, 2... Moving members 3a, 3b,
3c...Annular positioning groove, 4a, 4b, 4c...
Positioning ball, 5... uneven portion, 51, 52, 51
a, 52a...Small groove.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A guide member provided with a guide hole; A movable member held movably in the axial direction in the guide hole of the guide member; Any of the guide member and the movable member. at least two or more annular positioning grooves formed on one of the guide members and the moving member; and a positioning ball that is held by the other of the guide member and the moving member, is biased in the radial direction, and is detachable from the annular positioning groove. In the axial movement positioning device for a member, either the guide member or the moving member engages with the positioning ball between two annular positioning grooves to prevent movement during axial movement of the moving member. An axial movement positioning device for a moving member, characterized by having an uneven portion that acts as resistance. (2) The axial movement positioning device for a moving member according to claim 1, wherein the uneven portion is formed of narrow grooves arranged in parallel and narrower than the annular positioning groove. (3) The axial movement positioning device for a moving member according to claim 2, wherein the narrow groove is a spiral groove. (4) The axial movement positioning device for a moving member according to claim 1, wherein the width of the narrow groove is less than 1/2 of the diameter of the positioning ball. (5) The moving member and the guide member are provided with an annular positioning groove and a positioning ball on one end side of the moving member,
The apparatus for axially moving and positioning a moving member according to claim 1, wherein the other end of the moving member is connected and held to an operating member for operating and controlling the moving member. (6) The axial movement positioning device for a moving member according to claim 4, wherein an intermediate portion between one end and the other end of the moving member forms a pressure fluid switching valve.