JPH0754873A - One-way direct-acting clutch mechanism and high-speed vise using it - Google Patents

Abstract

PURPOSE:To obtain a one-way direct-acting clutch mechanism and a high speed vise by providing a pair of fixation bearings pivoting both ends of a screw shaft formed with a plurality of slits, two movable bearing boxes screwed with the screw shaft, and an elastic member which energizes the movable bearings so as to comes close to and separate from each other in the axial direction. CONSTITUTION:Both ends 11 of a screw shaft 1 having pitch angle ranging 70 to 87 degrees are pivoted to a fixation bearing 3. Movable bearing boxes 9, 10 are fitted to and screwed with female screw holes 7, 8 at the screw shaft 1. At the close contact position, the movable bearing boxes 9, 10 can be slid freely left and right due to revolving of the screw shaft 1. The movable bearing boxes 9, 10 are moved bilaterally with a small stroke for close contact, which bearing boxes 9, 10 are energized so as to separate from each other by means of a coil spring 12 through rotation of a release lever 15 of the movable bearing box 10. When the movable boxes 9, 10 are separated from each other, the spring 12 is compressed between a cam shaft 14 and a long hole 16. The movable bearing boxes 9, 10 can easily slide leftward along the screw shaft, but can not slide rightward. Function as one-way clutch is thus obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-way direct acting clutch mechanism, and more particularly to a one-way direct acting clutch mechanism capable of fixing a movable bearing box at an arbitrary position within a stroke.

[0002]

2. Description of the Related Art Conventionally, a caulking material press-fitting tool for filling wall joints and a small high speed vise called a quick vise have a push rod 110 and a spring 70 having a locking hole 70 through which the push rod penetrates as shown in FIG. A simple one-way linear motion clutch mechanism composed of a plate-shaped locking piece is used.

The push rod 110 is a kind of one-way linear motion that can be locked (reversed) at any position by the spring being assisted by the spring to help the locking hole of the locking piece to bite. It is a clutch. Of course, when the push rod is pushed out, it slides easily, and the non-return can be easily released by pushing the locking piece with the fingertip.

However, such a conventional one-way direct-acting clutch mechanism has a problem in that a strong check force cannot be expected due to its structure. That is, since the locking itself is performed by pressing the locking hole edge of the locking piece into the push rod as described above, it is advantageous in that the structure is simple and the locking can be performed at any position. However, if a large amount of back pressure is applied to the push rod, it tends to be unsupported and slip, and even in the case of the quick vice, the maximum total back pressure is 18
About 0 kg is fine, and when vibration is applied, the locking becomes incomplete, and there is a problem that reliability is further deteriorated.

The inventor of the present invention has a problem in the prior art that the excessive stress concentration between the push rod and the locking piece / edge of the locking hole causes a wider contact surface to be improved. As a result of earnest research and trial, the present invention has been achieved by obtaining technical conviction that the push rod should be locked with.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a one-way linear motion clutch mechanism capable of fixing a movable bearing box at an arbitrary position within a stroke and a high speed vise using the same.

Another object of the present invention is to provide a one-way linear motion clutch mechanism having a larger pressure receiving area and higher reliability than a conventional locking mechanism and a high speed vise using the same.

[0008]

According to the present invention, a multi-start screw shaft, a pair of fixed bearings pivotally mounting the shaft at both shaft ends, a connecting member for connecting and fixing the pair of fixed bearings, and the multi-start screw described above. And at least two movable bearing boxes containing a bearing having an inner race with an internal gear that is screwed onto the shaft, and the at least two inner races with an internal gear approach each other along the axial direction or A one-way direct-acting clutch mechanism (claim 1), characterized by comprising an elastic member for urging them to separate from each other (claim 1), and a one-way direct-acting clutch mechanism (claim 1) in which the connecting member is a support base. 2) The one-way linear motion clutch mechanism (claim 3) according to claim 1, wherein the connecting member is a tubular connecting member having a multi-threaded screw shaft internally and having an opening groove along the axial direction. The one-way linear motion clutch mechanism according to claim 3, which is a groove. (4) The one-way linear motion clutch mechanism (Claim 5) according to any one of claims 1 to 4, wherein the multi-thread screw shaft is a long-axis twisted plate having a twist angle of 2 to 15 °. A one-way linear motion clutch mechanism (claim 6) according to any one of claims 1 to 5, wherein a ball is made to intervene in a part or all of the joint part, the sliding part and the pivotal part, to a workbench. And a fixed bearing box having a fixed bearing box that incorporates a bearing for pivotally mounting an inner race with an internal gear and a release mechanism for a one-way linear motion clutch, and a fixed bearing for the base. A pair of movable bearing boxes that are connected by a pair of horizontal sliding connecting rods that are loosely fitted through the box and that are arranged on both sides of the base;
Both ends are rotatably supported between the pair of movable bearing boxes, and a multiple threaded screw shaft screwed into the geared inner race in the fixed bearing and a multiple threaded portion fixed to a rotatable handle. A female screw to be screwed into the single-threaded screw shaft portion of the screw shaft is pivotally attached, and a gripping tool B that slides on the pair of horizontal sliding connecting rods with a short stroke is provided. A high-speed vise (high-speed vise) characterized in that the grips A and B can be moved toward and away from each other at high speed and the powerful screws can be tightened and released by pushing and pulling the grip in the axial direction during the stroke and rotating the grip during the heavy-load stroke, respectively 8. An elastic member for urging a pair of inner gear-equipped inner races so as to approach each other, and a one-way linear clutch disengagement mechanism, and the inner race for resisting the urging force of the elastic members. Cam mechanism that acts to separate them from each other Fast vise according to claim 6, wherein the release mechanism of the one-way linear clutch consisting comprise (claim 8)
Will be provided.

The present invention will be described in detail below with reference to examples.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view of an essential part of an embodiment of the present invention, FIG. 2 is an exploded perspective view of another embodiment, and FIGS. 3, 4, 5, 6, 7, 8, 9
[Fig. 6] is a perspective view of a main part of another embodiment. In addition,
12 is a partial cross-sectional perspective view and a partial cross-sectional perspective view of the essential part of a quick vise as an application example.

1, 2, 3, 4, 5, 6, 7, 8, 9,
In 10, 11, and 12, 1, 1A and 1B are multi-thread screw shafts, 1C is a straight shaft, 3 is a fixed bearing, 4 is a bolt, and 5, 5
A, 5B are support bases (sheaths), 7, 7A, 8, 8A are female screw holes, 9, 9'9A, 10, 10A are movable bearing boxes, 11 is a shaft end portion of a multi-thread screw shaft, 12 and 12A are Coil spring, 14
Is a cam, 15 is a cam drive lever, 16 is a long hole, 17 is a cam shaft hole, 18 and 19 are release lever mounting holes, 20 is a release lever mounting screw, 21 is a single opening long hole, 22 is a shaft-like projection, 2
3 is an axial projection fitting hole, 24 is a pivot shaft, 25 is a release lever, 41 is a helical spline, 50 is a ball circulation pipe, and 51 is a ball.

In FIG. 1, reference numeral 1 is a multiple thread screw shaft having a pitch angle of 70 to 87 °.

The movable bearings 9 and 10 are made of a carbon steel plate having a thickness of 1.0 to 1.2 mm, and both are screwed onto the screw shaft 1. Two movable bearings (movable locking pieces) 9, movable bearing 10
Are hinged so that they can be separated from each other and approached by a hinge portion 60, but if they are approached against each other by urging the urging force of the spring 12 by grasping them with a hand, the screw phase approaches, so that the screw axis direction is increased. It can be moved left and right along.

However, once the hand is released, a locking state occurs between the female screw hole 7A of the movable bearing 9 and the screw shaft 41A,
It cannot move to the right. However, since the locked state does not occur in the left direction, it can be moved freely.

In FIG. 2, reference numeral 1 indicates a pitch angle of 70-8.
7 ° large bitch screw shaft screw shaft. And both shaft ends 1
No screws 1 and 11 are fixed to the fixed bearings 3 and 3. The fixed bearings 3 are fixed to both ends of the support 5. The movable bearing boxes 9 and 10 are fitted and screwed into the female screw holes 7 and 8 by the screw shaft 1, respectively. The movable bearing box 9 is fitted in the inverted L-shaped recess 10X of the movable bearing box 10, and the movable bearing box 9 is mounted on the recessed standing wall 10Y at the rightmost end in FIG.
With the upright wall 9Y in close contact, the screw phases of both 9 and 10 match. Therefore, at this close contact position, the movable bearing boxes 9 and 10 can freely slide left and right along the screw axis direction while the screw shaft 1 rotates.

By the way, a cam shaft hole 17 is bored in the upper part of the movable bearing box 10, and a cam 14 rotatable by a release lever 15 is pivotally mounted in the cam shaft hole 17 and attached to the cam 14. Has an eccentric projection 14A fixed thereto, and an elongated hole 16 formed in the upper surface of the movable bearing box 9 that is long at right angles to the screw axis direction.
The sliding piece 13 fitted in is pivotally attached. That is, by rotating the release lever 15, the coil spring 1
It is possible to move the movable bearing boxes 9 and 10 which are urged to be separated from each other by 2 to the right and left by a small stroke provided by the cam shaft 17 so as to be separated from each other and closely approached to each other.

Therefore, from the first contact state, the movable bearing boxes 9 and 1 are rotated by the operation of the release lever and the spring biasing force.
When 0 is separated, the spring 12 is compressed by a slight gap between the cam shaft and the elongated hole, so that the movable bearing boxes 9 and 10 can be easily slid to the left along the screw axis direction. You can, but you cannot slide it to the right.

This is because the movable bearing boxes 9 and 10 are out of phase with each other.

Therefore, from this action, the present device can be made to function as a one-way clutch.

Since the present invention has extremely strong maximum reverse check pressure as compared with the prior art shown in FIG. 13, it can be said that it is an optimal mechanism for applications such as a quick vise described later.

Because when the force to move it to the right in FIG. 1 acts, all the pressure is once converted into the rotational force of the screw shaft, and this rotational force can be easily applied with a small force. Because it can support.

Another embodiment will be described below.

In FIGS. 3 and 4, what is largely different from the case of FIG. 2 is that the function of the support base 5 is the support sheath 5A.
That is, the fixed bearings 3 and 3 became 3A and 3A, respectively. The support sheath 5A is a sheath-shaped support base that wraps the screw shaft 1 from the outside, and has three opening grooves in the axial direction. Movable bearing box 9
A spring 12 is provided between A and 10A to urge it away. A pair of shaft-shaped projections 22, 22 are fixed to the outer periphery of the annular movable bearing box 9A, and these are fitted into the pair of elongated opening holes 21, 21 of the other movable bearing 10A.
The outer periphery of the movable bearing 10A is provided with a pair of screw holes 19 and 19, and the opening lever 25 has the screw holes 19 and 19 described above.
It is pivotally attached to each other by bolts 20,20. Lever 2
Link arms 26 and 26 are hinged to the lower parts of both legs of the hinge 5, respectively.
It is pivoted at 4, 24 and serves as the cam 14 in FIG. That is, when the lever 25 is moved in the direction of the arrow X, the movable bearing boxes 9A and 10A can freely (lightly) slide left and right along the axis of the screw shaft. However, when the lever 25 is fully moved in the Y direction, the movable bearing box 9A,
10A can freely slide in the left direction, but cannot slide in the right direction at all. That is, it functions as a one-way clutch.

FIG. 5 shows that the multi-start screw shaft 1 is a triple-start screw, and FIG. 6 is that where the screw shaft 1 is the twist shaft 1B.
FIG. 7 shows the structure of FIG. 5 in which the support sheath is further twisted, and FIG. 8 is the reverse of FIG. 5, in which only the support sheath is twisted and the screw shaft 1C is a linear spline. FIG. 9 shows the one in FIG. 5 in which a large number of balls are inserted in the sliding portion between the movable bearing boxes 9A and 10A and the torsion shaft and the support sheath to reduce the frictional resistance. In this case, the ball moves through the ball circulation pipe 50.

The following embodiment is an application of one of the embodiments of the various mechanisms described above to a quick vise. 10 and 1
1 and 12, there is only one fixed bearing 3 at the left end, and it is both the movable bearing box 10 and the pressure plate 60 that narrowly support the work (not shown) as a vise. See also FIG.
The bars 5C and 5D correspond to the supporting table 5 of.

The movable bearings 10 and 9 are spiral springs 12A.
Is urged away by. This spiral spring 12A
Performs the same function as the coil spring in other embodiments.
A screw shaft pivot hole 63 is formed in the pressure plate 60, and the screw shaft end portion 11 is pivotally mounted through the sleeve tip portion 73. The sleeve 70 restricts the axial movement of the pressure plate 60 by the flange 75 and the snap ring 74.
A male screw 71 is provided on the extension of the screw shaft end 11 and is screwed into a female screw 72 formed on the inner surface of the sleeve 70. Thus, the stick 80 is in a screwed state with the multi-thread screw shaft 1A. A spherical grip 66 for pressing and a grip grip 65 for rotating and pulling are screwed to the end of the stick. With the lever 15 in the X position, the knob 65 is gripped to pull out the grip portion B, and the work (not shown) is sandwiched between the grip tools A and B, and the lever 15 is moved to the Y position to move in one direction. After forming a clutch, the knob 66 is manually pushed to lightly clamp the work (the gripping portion B slides only to the left at this time) (this is a light load stroke).
Next, when the handle 65 is rotated in the Z direction (rightward screw direction), the male and female screws 71 and 72 are screwed into each other, and a strong clamping force is exerted between the grippers A and B, so that the workpiece can be tightened. At this time, the gripper A does not move backward (to the left) at all at the above-mentioned principle (this is a heavy load stroke). To remove the work, follow the reverse procedure.

[0027]

By carrying out the present invention, all of the above objects can be achieved. That is, a one-way linear motion clutch mechanism capable of fixing the movable bearing box at an arbitrary position within the stroke and a high-speed vise utilizing this mechanism can be obtained. Furthermore, in the case of a high-speed vise, not only can the gripping part slide freely within the stroke, but the rotation of the shaft itself is fixed in the direction of rotation by a high-pitch screw shaft, and the screw of a coaxial low-pitch screw is used. This is a very desirable effect for high-speed vices, because it enables strong axial tightening.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of another embodiment.

FIG. 3 is a perspective view of a main part of another embodiment.

FIG. 4 is a perspective view of a main part of another embodiment.

FIG. 5 is a perspective view of a main part of another embodiment.

FIG. 6 is a perspective view of a main part of another embodiment.

FIG. 7 is a perspective view of a main part of another embodiment.

FIG. 8 is a perspective view of a main part of another embodiment.

FIG. 9 is a perspective view of a main part of another embodiment.

FIG. 10 is a partial cross-sectional perspective view of a quick vice which is an application example and a partial cross-sectional perspective view of a main part.

FIG. 11 is a partial cross-sectional perspective view of a quick vice which is an application example and a partial cross-sectional perspective view of a main part.

FIG. 12 is a partial cross-sectional perspective view of a quick vice which is an application example and a partial cross-sectional perspective view of a main part.

FIG. 13 is a perspective view of a conventional simple one-way linear motion clutch mechanism.

[Explanation of symbols]

 1 Multi-start screw shaft 1A Multi-start screw shaft 1B Multi-start screw shaft 1C Straight shaft 3 Fixed bearing 4 Bolt 5 Support stand (sheath) 5A Support stand (sheath) 5B Support stand (sheath) 7 Female screw hole 7A Female screw hole 8 Female screw hole 8A Female screw hole 9 Movable bearing box 9'Movable bearing box 9A Movable bearing box 10 Movable bearing box 10A Movable bearing box 11 Shaft end of multi-thread screw shaft 12 Coil spring 12A Coil spring 14 Cam 15 Cam drive lever 16 Long hole 17 Cam Shaft hole 18 Release lever mounting hole 19 Release lever mounting hole 20 Release lever mounting screw 21 Single opening long hole 22 Axial protrusion 23 Axial protrusion fitting hole 24 Pivoting shaft 25 Release lever 41 Helical spline 50 Ball circulation pipe 51 Ball

Claims (8)

[Claims] 1. A multi-start screw shaft, a pair of fixed bearings for pivotally mounting the multi-start screw shaft at both shaft ends, a connecting member for connecting and fixing the pair of fixed bearings, and a multi-start screw shaft screwed together. And at least two movable bearing housings each containing a bearing having an inner race with an internal gear. The at least two inner races with an internal gear are provided so as to approach or separate from each other in the axial direction. A one-way linear motion clutch mechanism comprising an elastic member for urging. 2. The one-way linear motion clutch mechanism according to claim 1, wherein the connecting member is a support base. 3. The one-way direct-acting clutch mechanism according to claim 1, wherein the connecting member is a tubular connecting member having a multi-threaded screw shaft provided therein and having an opening groove extending along the axial direction. 4. The one-way linear motion clutch mechanism according to claim 3, wherein the opening groove is a spiral groove. 5. The one-way direct acting clutch mechanism according to claim 1, wherein the multi-thread screw shaft is a long-axis twisted plate having a twist angle of 2 to 15 °. 6. The one-way direct-acting clutch mechanism according to claim 1, wherein a ball intervenes in a part or all of the threaded portion, the sliding portion, and the pivotally attached portion. 7. A grasping tool A which is integrated with a mechanism for fixing to a workbench.
A base having a fixed bearing box having a bearing for pivotally mounting an inner race with an internal gear and a release mechanism for a one-way linear motion clutch; and a base that is loosely fitted through the fixed bearing box of the base.
Connected with a pair of horizontal sliding connecting rods and placed on both sides of the base
A pair of movable bearing boxes, a multi-threaded screw shaft that is rotatably supported between the pair of movable bearing boxes, and is screwed to a geared inner race in the fixed bearing, and a rotatable handle A gripping tool B which is fixedly attached to the shaft end of the multi-threaded screw shaft and which is screwed into the single-threaded screw shaft portion, and which slides on the pair of horizontal sliding connecting rods in a short stroke. With a light load stroke, by pushing and pulling the handle in the axial direction, and during a heavy load stroke, by rotating the handle, high-speed approach / separation of the grippers A and B and strong screw tightening and releasing are possible. Features a high speed vise. 8. A one-way linear clutch disengagement mechanism urges a pair of inner gear-equipped inner races toward each other, and an elastic member that resists the urging force of the elastic members. 7. The high-speed vise according to claim 6, which is a disengagement mechanism of the one-way direct-acting clutch including a cam mechanism that acts so as to separate them from each other.