JPH0970726A - Stock vice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To move a travel jaw forward and backward, and adjust the travel speed thereof under the application of only the constant torque of a power mechanism by providing a shift mechanism having a planetary gear to adjust the moving speed of the travel jaw and the clamping force thereof. SOLUTION: The normal torque of a casing 42 is shifted to a first stage via the ratio of the gear tooth numbers of a second rotating sun gear 421, a second planetary gear 434 and a fixed sun gear 411 at a torque transmission process. In this case, a gear ratio is low and, therefore, a casing 43 rotates normally at relatively high speed. Thus the normal torque of the casing 43 is transmitted to a transfer screw via a power transmission shaft 431 projected from the front of the casing 43, thereby normally rotating the screw at high speed. As a result, a slide body and a travel jaw mounted thereon quickly move forward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of adjusting the moving speed and the clamping force of a moving jaw that clamps a workpiece together with a fixed jaw, and rotates the power mechanism after the workpiece is firmly clamped. The present invention relates to a vise in which transmission of force to the moving jaw side is blocked.

[0002]

2. Description of the Related Art Conventionally, there have been a hand-turning vise for rotating a handle forward and backward by hand to rotate a moving jaw forward and backward, and a hydraulic vise for hydraulically moving a moving jaw forward and backward.

[0003]

However, in the conventional vise as described above, in the former hand-turning type vise, since the moving jaw is moved forward by human power, once the workpiece is clamped, only manual power is applied thereafter. Since it is not possible to move the moving jaw forward and clamp the work piece robustly, normally, a separate tool such as a hammer is used to hit and rotate the handle in the forward rotation direction to advance the moving jaw and make the work piece robust. Clamp to. Also,
When the work of the workpiece is completed and the robust clamping state of the workpiece is released, the handle is also driven in the reverse rotation direction. Since the vise and the work piece receive such an excessive impact, there is a problem that they are damaged or broken. For this reason, the use of the vise is very cumbersome and inconvenient, and it is extremely difficult to judge whether or not the workpiece is completely clamped. On the other hand, the latter hydraulic vise has the advantage that it is convenient to use, but even if there is a slight abnormality in the hydraulic system during use, the hydraulic pressure will drop, so the clamping state of the workpiece will be released arbitrarily and it will be used for many work. However, there are disadvantages such as the risk of being expensive and the price being expensive.

The present invention has been made to solve the above-mentioned problems, and the forward / backward movement of the moving jaw and the moving speed thereof can be adjusted only by a constant rotational force of the power mechanism. The moving jaw clamps the workpiece to adjust the clamping force, as well as easily canceling the strongly clamped state, and after the workpiece is firmly clamped, the rotating force from the power mechanism It is an object of the present invention to provide a vise in which the transmission of the above to the moving jaw side is blocked.

[0005]

In order to achieve the above object, the present invention provides a slide body provided with a moving jaw for clamping a work piece together with a fixed jaw at a front end surface of a slide body.・ In a vise installed so that it can move forward and backward on the main body by reverse rotation, the transfer screw that moves the moving jaw is
The rotating force transmission mechanism is provided with an input / output shaft member for transmitting or blocking the rotational force of the power mechanism for reverse rotation. Further, the rotational force of the output shaft member is provided between the output shaft member of the rotational force transmission mechanism and the rear end surface of the slide body, and the rotational force of the output shaft member is transmitted to the transfer screw by shifting the rotational force to one stage or two stages. Not only adjustment, but also the clamping force of the moving jaw
The transmission is equipped with a planetary gear device. Further, the rotational force of the output shaft member is directly transmitted to the casing of the first planetary gear device, and a hooking device for hooking the output shaft member and the casing so as to rotate together is provided.

In the vise of the present invention having the above structure, when the power mechanism is operated, the rotational force thereof is transmitted to the speed change mechanism via the input / output shaft members of the rotational force transmission mechanism, and this rotational force is changed. By the action of the first and second planetary gear devices, the gear is transmitted to the transfer screw after being shifted in one or two stages, so that the forward / backward movement of the moving jaw depends on the direction of the rotational force transmitted to the transfer screw and the degree of the shift. The moving distance, moving speed, and clamping force are adjusted. That is, before the moving jaw clamps the workpiece, or after the processing operation of the workpiece is completed and the robust clamping state is temporarily released, the first planetary gear device of the hooking device and the speed change mechanism. By this action, the rotational force is shifted only by one step, so the gear ratio becomes low, and the moving jaw moves rapidly forward and backward. However, when the moving jaw once clamps the work piece, a strong clamping force is required, or when the strongly clamped state is released at the initial stage, the first and second planetary gears of the transmission mechanism are Since the rotational force is shifted in two steps by the interlocking action of the device, the gear ratio becomes high and the moving speed of the moving jaw becomes slow, but a strong force is generated in inverse proportion to the gear ratio. Robust clamping can be done, and the robust clamping state can be released easily. Also, if the moving jaw firmly clamps the work piece, the rotating force for further forward movement becomes unnecessary. Nevertheless, if the power mechanism is continuously operated, the rotating force will rotate. Since the transmission to the transmission mechanism is blocked by the action of the force transmission mechanism, excessive clamping force will not be applied to the vise or workpiece,
These damages or breaks can be prevented.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the fixed jaw 1 is provided at the front position of the main body 10.
1 is attached to the front surface of a slide body 13 which is provided so as to move forward and backward on a guide rail 12 which is provided so as to horizontally traverse the upper surface. A moving jaw 14 for clamping A is attached. The slide body 13 is
It moves forward and backward by the action of the transfer screw 15 which is provided so as to rotate normally and reversely depending on the rotation direction of the rotational force from the power mechanism 20. As the power mechanism 20, a general hand-turning handle, a tooth follow-up handle, an electric motor (not shown), or the like is used.

On the rear surface of the slide body 13, there are a rotational force transmission mechanism 30 for transmitting the rotational force of the power mechanism 20 only when necessary, and a speed change mechanism 40 for changing the rotational force transmitted from the rotational force transmission mechanism 30. Is provided. The rotational force transmission mechanism 30 includes a cylindrical housing 31, a key groove 35 in the housing 31, and a key 36 that meshes with the key groove 35.
Accordingly, the input shaft member 32 and the output shaft member 33 are connected and installed so that the front and rear end faces are in surface contact with each other. The key groove 35 and the key 36 are respectively used for the input / output shaft member 3
The key grooves 35 may be formed in the input shaft member 32 in a concave manner, and the keys 36 may be formed in the output shaft member 33 in a protruding manner, although they may be formed on either the front or rear end surfaces of the second and the third members. Is an example. Further, each of the key groove 35 and the key 36 may be formed in plural. In this case, when the number is two, each is 180 ° on an arc of the same radius from the center of the joint surface.
In the case of three intervals, it may be formed at intervals of 120 °.

Among the concave / protruding surfaces of the key groove 35 and the key 36, the surfaces on the side in which the input / output shaft members 32, 33 rotate in the forward direction are formed as flat end surfaces 351, 361. The surfaces on the side of the reverse rotation direction are formed to be curved surfaces 352 and 362, and the positive rotation force of the input / output shaft members 32 and 33 is transmitted so that the curved surfaces 352 and 362 mesh with each other. The flat end surfaces 351 and 361 are engaged and transmitted. The input shaft member 32 has a housing 31 at the rear end thereof.
It is rotatably installed by being coupled so as to be exposed to the rear through a through hole 311 formed in the center of the rear surface. The output shaft member 33 is fixedly attached by welding after fixing the rear end portion having the spiral 331 formed on the outer peripheral surface to the front end portion of the housing 31 having the spiral 312 formed on the inner peripheral surface. The output shaft member 33 and the housing 31 rotate together.

Further, the input shaft member 32 is urged toward the output shaft member 33 by the action of the indicator flange 321 which is annularly provided on the tip end side thereof and the spring member 34 which is interposed between the rear end inner surface of the housing 31. (Elasticity), the front and rear end faces of these input / output shaft members are brought into close contact with each other. A coupling groove 322 for coupling the power shaft 21 of the power mechanism 20 is formed on the rear end surface of the input shaft member 32, and a measuring scale 37 is marked on the outer peripheral surface. Each of the coupling groove 322 and the power shaft 21 coupled thereto has a rectangular end surface, and the rotational force is smoothly transmitted only by coupling these. The measuring scale 37 is located inside the through hole 311 of the housing 31 and invisible from the outside when the input shaft member 32 is elastically advanced by the action of the spring member 34 and is in a forward state, but the input shaft member 32 is a spring. When the member 34 is moved backward while being compressed, the measuring scale 37 is exposed to the outside of the through hole 311. Therefore, the clamping force can be seen by observing the exposed amount.

The speed change mechanism 40 is composed of first and second planetary gear units. The first planetary gear device includes a first rotary sun gear 332 formed at the tip of the output shaft member 33, and a planetary gear housing 41 fixedly mounted on the rear end surface of the slide body 13. Fixed sun gear 411
And a first casing 42 in which a front end portion is inserted into a rear end surface of the housing 41 so as to be freely rotatable, and a shaft coupling port 422 is formed at a center of the rear surface to be recessed in a longitudinal direction, and the casing 42. The four first planetary gears 425, each of which is axially mounted by a shaft 426, into four gear installation holes 423 formed so as to penetrate between the outer peripheral surface of the shaft and the inner peripheral surface on the inner end side of the shaft coupling port 422. It consists of and.

The casing 42 is the planetary gear housing 4
By a snap ring 412 formed on the inner peripheral surface of the rear end of the first unit, the shaft is coupled so as not to separate from the housing and rotated, and the tip end of the output shaft member 33 is fitted to the shaft coupling port 422.
It is inserted backwards and rotatably. That is, the output shaft member 33
When the vehicle moves backward, the braking collar 336 is hooked on the snap ring 424. Therefore, the backward movement is braked, and at the same time, the tip end of the output shaft member 33 is prevented from being separated from the shaft coupling port 422. When the shaft member 33 moves forward, the braking collar 336 ′ is caught by the snap ring 424 so that the forward movement is stopped. Therefore, the output shaft member 3
3 is a braking collar 3 that is selectively caught by the snap ring 424.
By 36 and 336 ', control is performed so as to move forward and backward within the range of these intervals.

On the other hand, the gear installation hole 423 is provided in the casing 42.
And the first planetary gear 425.
Each of the gear installation holes 42 has a diameter r larger than the inner / outer width f of the gear installation hole 423.
The portion exposed to the outside of 3 is meshed with the fixed sun gear 411, and the portion exposed to the inside is the first rotation provided at the tip of the output shaft member 33 when the output shaft member 33 advances in the shaft coupling port 422. It is adapted to mesh with the sun gear 332. Further, a hooking device is provided which hooks the output shaft member 33 and the casing 42 so as to rotate together when the output shaft member 33 is moved backward.

This hooking device is provided with the first shaft of the output shaft member 33.
Ball engaging groove 333 formed in a concave shape on the outer peripheral surface of the rear of the rotating sun gear 332 at a constant interval, and a ball installation hole 427 formed so as to penetrate from the outer surface of the casing 42 to the shaft coupling port 422 side. And this ball installation hole 4
A ball 45 that is inserted into the shaft coupling opening 422 and is partially exposed in the shaft coupling opening 422; It consists of.

A plurality of ball hooking grooves 333 are provided on the same circumference at regular intervals, and the spring member 46 adjusts the ball 45 depending on the degree to which the cap screw 47 is fastened.
It is preferable that the resilience force for resilience is adjusted. Therefore, when the output shaft member 33 is moved backward until the braking collar 336 formed on the outer peripheral surface thereof is caught by the snap ring 424, the ball hooking groove 333 is positioned on the same line as the ball 45. When the shaft member 33 is properly rotated and the positions of the ball hooking groove 333 and the ball 45 are aligned with each other, a part of this ball is inserted into the ball hooking groove 333 by the resilient action of the spring member 46 and hooked. While the hooked state is not released, the output shaft member 33 and the casing 42 rotate together.

The ball hooking groove 3 of the output shaft member 33
A ball hooking collar 334 is provided on the outer peripheral surface between the braking lever 336 and the braking collar 336 so that the ball 45 is caught by the output shaft member 33 when the output shaft member 33 is moved forward so that the ball 45 cannot be moved backward arbitrarily. It is set up. A ball moving path 335 is formed between the ball hooking groove 333 and the ball hooking collar 334 to guide the output shaft member 33 to move forward while rotating. The ball movement path 335 gradually becomes shallower and narrower as it goes from the tip connected to the ball hooking groove 333 to the rear end connected to the ball hooking collar 334, and at the same time, the output shaft member 33 is reversed. It is formed so as to be inclined in the direction of movement when the direction is rotated.

The second planetary gear device has a second rotary sun gear 421 projecting from the front surface of the casing 42 and a shaft coupling port 432 at the center of the rear surface to which the second rotary sun gear 421 is coupled. The transfer screw 15 is installed at the center of the front surface.
A second casing 43 having a transmission shaft 431 projecting from the rear end face that is coupled to the coupling groove 151, and an outer peripheral surface of the casing 43 and an inner peripheral surface on the inner end side of the shaft coupling port 432 penetrate through the second casing 43. It is composed of four second planetary gears 434, each of which is axially attached by a shaft 435 to the four gear installation holes 433 that are opened.

On the other hand, the gear installation hole 433 is provided in the casing 43.
And the second planetary gear 434.
The diameter r'of each is the inner / outer width f'of the gear installation hole 433.
By axially mounting a larger one, the portion exposed to the outside of the gear device hole 433 engages with the fixed sun gear 411, and the portion exposed to the inside engages with the second rotating sun gear 421. To Then, the coupling groove 151
Since the transmission shaft 431 and the transmission shaft 431 are formed so that their end faces have a square shape, the rotational force is smoothly transmitted by simply connecting them. On the other hand, a washer 44 is interposed between the peripheral portion of the front surface of the casing 42 and the peripheral portion of the rear surface of the casing 43 so that the peripheral portions of these casings do not come into direct surface contact.

Next, the operation of the vise according to the embodiment of the present invention constructed as above will be described. When the slide body 13 is moved backward, the slide body 13 is moved forward to move together with the fixed jaw 11 as shown in FIG.
When the workpiece 4 is to be clamped by the work piece A, a fast rotational force for promptly advancing the moving jaw 14 is required. For this purpose, first, as shown in FIG. The first rotating sun gear 332 formed at the tip of the output shaft member 33 is pulled toward the rear of the transmission mechanism 40.
The ball 45 is engaged with the ball hooking groove 333 by separating the ball 45 from the first planetary gear 425.

In such a state, the power mechanism 20 for providing a fast rotational force to the coupling groove 322 on the rear end surface of the input shaft member 32.
That is, the power shaft 21 of the electric motor or the handwheel is connected to rotate the input shaft member 32 forward. At this time, the input shaft member 32 is moved by the elastic force of the spring member 34 to the output shaft member 3
Since the front and rear end surfaces of these members are in close contact with each other at the same time as the key groove 35 and the key 36 are meshed with each other, the positive rotational force of the input shaft member 32 is equal to the output shaft member 33. Be transmitted to. In this case, the positive rotational force of the output shaft member 33 is a ball hooking groove 333 that is a hooking device that hooks the output shaft member 33 and the casing 42 so that the output shaft member 33 and the casing 42 can rotate together, and the ball hooking groove 333. Since it is transmitted to the casing 42 by the hooking action of the worn ball 45, the output shaft member 33 and the casing 42 rotate forward together.

When the casing 42 is normally rotated in this way, the second planetary gear 421 having the second rotary sun gear 421 protrudingly formed on the front surface of the casing 42 is axially attached to each gear installation hole 433 of the casing 43. Since it meshes with 434, the positive rotational force of the casing 42 is transmitted to the second planetary gear 434 by the second rotating sun gear 421 and causes the planetary gear 434 to rotate. As a result, when the second planetary gear 434 rotates, the other part of the planetary gear 434 meshes with the fixed sun gear 411, so that the second planetary gear 434 rotates and idles between the sun gears 411 and 421. As a result, the casing 43 eventually rotates forward.

In the process of transmitting the rotational force, the positive rotational force of the casing 42 is shifted in one step according to the gear tooth ratio of the second rotary sun gear 421, the second planetary gear 434 and the fixed sun gear 411. In this gear ratio S, the number of gear teeth (a) of the second sun gear 421 is 18, the number of gear teeth (b) of the second planetary gear 434 is 18, and the gear teeth of the first sun gear 411. When the number (c) is 54,

## EQU1 ## S = (b + c) / a = (18 + 54) / 18 = 4

That is, the gear ratio is changed to 4: 1 and the gear ratio at this time is low, so that the casing 43 makes a relatively fast forward rotation. In this case, the positive rotation force of the casing 43 is transmitted to the transfer screw 15 by the transmission shaft 431 provided on the front surface of the casing 43, and the screw is quickly rotated in the forward direction. The moved jaw 14 is rapidly moved forward.

On the other hand, in such an operating process, the casing 4
2 is loaded, but its force is weaker than the elastic force of the spring member 46 that repels the ball 45, the ball 45 is not separated from the ball hooking groove 333, and this hooking state is maintained. Therefore, the output shaft member 33
Is smoothly transmitted to the casing 42. Also,
Although a load is also applied to the output shaft member 33, the force is weaker than the elastic force of the spring member 34, so that the key groove 35 and the key 36 are kept in mesh with each other, and the positive rotation force of the input shaft member 32 is maintained. The curved surface 352 of the key groove 35 and the key 36
Only the meshed state of 362 is transmitted smoothly.

With this operation, the moving jaw 14 is moved forward, and once the workpiece A is clamped as shown in FIG. 1, the spring member 46 is attached to the casing 42 at this time.
Since a braking force stronger than the elastic force of is applied, the braking force is applied to the normal rotation of this casing. If the output shaft member 33 is continuously rotated forward even in such a state, the output shaft member 33 rotates, but the casing 42 is not rotated by the braking force, so that the ball hooking groove 333 passes the position of the ball 45. . At this time, the ball 45 comes into contact with the tip of the ball moving portion 335 from the ball hooking groove 333 which is a moving guide means for guiding the output shaft member 33 so as to move forward while rotating.
5 connects between the ball hooking groove 333 and the ball hooking collar 334 on the rear side, and the depth and width gradually become shallower and narrower as going from the tip to the rear side, and at the same time, reverse rotation is performed. Since the ball is formed so as to be recessed in the direction, the output shaft member 33 moves forward while rotating forward due to the meshing action of the ball moving path 335 and the ball 45.

In this process, the ball 45 is pushed into the ball installation hole 427 while compressing the spring member 46 by the ball moving path 335 whose depth becomes gradually shallow, and passes through the rear end of the ball moving path 335. The position of the ball hooking collar 334 is reached. Then, the compressed spring member 46 is pushed out and is caught by the ball catching collar 334. When the output shaft member 33 moves forward, the rear end portion and the housing 31 are fixedly attached, so that the rotational force transmitting mechanism 30 itself moves forward. When the rotational force transmission mechanism 30 moves forward by such an action, the first rotating sun gear 332 formed at the tip of the output shaft member 33 meshes with the first planetary gear 425 of the casing 42 as shown in FIG. At this time, since the ball 45 is hooked on the ball hooking collar 334, the output shaft member 33 cannot move backward from the forward movement state due to these hooking actions.

After that, the moving jaw 14 must be moved further forward to strongly clamp the workpiece A, which is being clamped together with the fixed jaw 11, during the machining operation so as not to move. Requires a strong rotational force to further advance the moving jaw 14. However, since the electric motor or the handwheel that is the power mechanism 20 used until then cannot obtain the rotational force for rotating the casing 42 that has been braked, a power like a tooth-pitch handle that can obtain a stronger rotational force. A mechanism is needed. Therefore, the input shaft member 32 separates the electric motor and the handwheel handle, and after connecting the additional tooth handle as shown in FIG. 6, the additional shaft handle rotates the input shaft member 32 in the forward direction.

In this way, the rotational force is transmitted to the first planetary gear 425 by the first rotary sun gear 332 of the output shaft member 33, which is the first planetary gear device of the speed change mechanism 40, and therefore these planets are transmitted. The gears rotate, but at this time, since the planet gears 425 also mesh with the fixed sun gear 411, the first planet gear 425 eventually rotates and idles with the first rotating positive gear 411. The casing 42 is normally rotated by.

In this way, the first rotating sun gear 33
The positive rotation force of 2 is the first planetary gear 425 and the fixed sun gear 4
The gear ratio is changed according to the gear tooth ratio of 11
Indicates that the number of gear teeth (a) of the first rotating sun gear 332 is 18
The number of gear teeth (b) of the first planetary gear 425 is 18
The fixed sun gear 411 has 54 gear teeth (c).
When it is an individual,

## EQU00002 ## S = (b + c) / a = (18 + 54) / 18 = 4

That is, it is converted into 4: 1. That is, when the output shaft member 33 makes four revolutions, the casing 42 makes one revolution, so that the positive rotational force is shifted one stage at 4: 1. When the casing 42 is normally rotated by the rotational force that has been shifted by one gear in this way, the rotational force is generated by the second rotary sun gear 421, which is the second planetary gear device, formed at the tip of each gear installation hole of the casing 43. Since it is transmitted to the second planetary gear 434 axially attached to the planetary gear 433, these planetary gears 43
4 rotates, but at this time, since the planet gears 434 also mesh with the fixed sun gear 411, the second planet gear 434 ends up with the second rotary sun gear 421 and the fixed sun gear 411. The casing 43 is normally rotated by spinning and idling between them.

In this process, the second rotary sun gear 42
The positive rotation force of 1 is the second planetary gear 434 and the fixed sun gear 4
The gear ratio is changed according to the gear tooth ratio of 11
Indicates that the number of gear teeth (a ′) of the second rotary sun gear 421 is 1
The number of gear teeth (b ') of the second planetary gear 434 is 18 and the number of gear teeth (c') of the fixed sun gear 411 is eight.
When there are 54,

## EQU3 ## S '= (b' + c ') / a' = (18 + 54)
/ 18 = 4

That is, the speed is changed to 4: 1. This allows
When the rotational force transmission mechanism 30 is moved forward to rotate the output shaft member 33 in the forward direction, the rotational force is transmitted to the first planetary gear 425 by the first rotating sun gear 332, and the first planetary gear 4
In the process in which 25 rotates and idles, the gear 25 is shifted one stage at a ratio of 4: 1, and the changed rotational force is applied to the second portion of the casing 42.
Is transmitted to the second planetary gear 434 by the rotating sun gear 421 and the second planetary gear shifts again in the process of spinning and idling by 2: 1 at a ratio of 4: 1. 2nd gear shift = 4 × 4 = 16, that is, 16:
Shift to 1. Therefore, although the rotational speed of the casing 43 becomes the lowest speed due to the interlocking action of the first and second planetary gear devices, the rotational force becomes extremely strong in inverse proportion to this, so that the transfer screw 15 is operated at a low speed. Strong forward rotation is possible, which allows the slide body 13 to move further forward and the moving jaw 14 to clamp the workpiece A together with the fixed jaw 11 with a strong force.

Of course, in such a process, a strong load is applied to the output shaft member 33, but the force thereof is weaker than the elastic force of the spring member 34 which elastically repels the input shaft member 32. Since the key groove 35 of the members 32 and 33 and the key 36 are kept in mesh with each other, the rotational force between these input / output shaft members is smoothly transmitted.

However, when the moving jaw 14 strongly clamps the workpiece A and cannot move forward any more, a strong braking force is applied to the output shaft member 33. At this time, the braking force is applied to the spring member 34. When the input shaft member 32 is normally rotated when the input shaft member 32 rotates, the output shaft member 33 does not rotate, so that the key groove 35 and the key 36 mesh with each other. A slip phenomenon occurs between the curved surfaces 352 and 362 that transmit the positive rotational force, and the two friction against each other. Therefore, the input shaft member 32 compresses the spring member 34 and moves backward to release the meshed state. To be done.

That is, as shown in FIG. 7, the key groove 35 and the key 36
Are out of mesh with each other, the input shaft member 32
Spins idly, and the rotating force disappears, so that an excessive clamping force is not transmitted to the vise itself or the workpiece A. Further, when the input shaft member 32 moves backward in such a process, the measurement scale 37 marked on the outer peripheral surface of the input shaft member 32 has the through hole 311 on the rear surface of the housing 31.
At this time, the movable jaw 1 that clamps the workpiece A is observed because the exposed amount of the measuring scale 37 at this time is exposed to the outside.
You can see the final clamping force of 4. In this way, when the input shaft member 32 idles, the workpiece A is already clamped by a strong force, so the input shaft member 32
Need not be rotated any further.

On the other hand, when the key groove 35 is placed at the position of the key 36 while the input shaft member 32 is idly rotating in such a process, the reversely moved input shaft member 32 is compressed and the elastic force of the spring member 34 is compressed. The key groove 35 and the key 36 are engaged again because they move forward. By performing the processing work after the work A is strongly clamped by such an operation, the clamping state is released and the work A is separated when the work A is completed. Since it is strongly clamped, a strong reverse rotation force is required to release it early. Therefore, for this purpose, it is sufficient to use the additional toothed handle as it is in the power mechanism 20, but at this time, after changing the rotational force transmitting direction of the additional toothed handle, the rotational force transmitting mechanism 30 moves forward as shown in FIG. In this state, the input shaft member 32 is rotated in the reverse direction. By doing so, the reverse rotational force is transmitted to the output shaft member 33 via the key grooves 35 and the flat end surfaces 351 and 361 of the key 36 which are engaged with each other. Even in such a case, since the input shaft member 32 does not idle, the reverse rotational force is smoothly transmitted.

The reverse rotational force transmitted in this way is transmitted to the first planetary gear 425 by the first rotating sun gear 332 at the tip of the output shaft member 33, and the casing rotates due to the rotation and idling action of these planetary gears. 42 rotates in the reverse direction, but due to the gear tooth ratio between the sun gears 332 and 411 and the first planetary gear 425 meshing with them in this process,
The reverse rotational force of the first rotary sun gear 332 is shifted by one step.

Further, the reverse rotational force that has been changed is applied to the casing 4
2 is transmitted to the second planetary gear 434 by the second rotary sun gear 421 on the front side of the second gear, and the casing 43 is reversely rotated by the rotation and idling action of these planetary gears. According to the gear tooth ratio of the second planetary gear 434 meshing with each other, the reverse rotational force of the second rotary sun gear 421 is shifted by two steps.
Therefore, since the reverse rotational force due to the tooth follower handle is shifted in two stages by the action of the first and second planetary gear devices, the transfer screw 15 reversely rotates at the lowest speed, but its rotational force is inversely proportional to this. Since it is strong, the moving jaw 14 that strongly clamps the workpiece A can be smoothly moved backward, and the strong clamping state can be easily released in the initial stage.

In this way, when the strong clamping state of the work A is released, thereafter, the moving jaw 14 is moved.
However, since a low speed and strong reverse rotation force using the additional tooth handle is not necessary for this, the additional tooth handle is separated at this time and the rotational force transmission mechanism 30 Pulls and moves backward, and the first rotating sun gear 33
2 is separated from the first planetary gear 425. By doing so, the ball hooking collar 334 of the output shaft member 33 is attached to the ball 4.
Although the ball passes through the position 5, the ball pushes into the ball installation hole 427 while compressing the spring member 46 at this time, so that the rotational force transmitting mechanism 30 smoothly moves backward.

When the backward movement is completed, the ball hooking groove 333 of the output shaft member 33 is located on the same line as the ball 45. Therefore, the output shaft member 33 should be properly rotated in either forward or reverse directions. When the ball hooking groove 333 is placed at the same position as the ball 45, the ball 45 is pushed out of the ball installation hole 427 by the elastic force of the compressed spring member 46, and a part of the ball 45 is pushed into the ball hooking groove. Since they are hooked on 333, the output shaft member 33 and the casing 42 can rotate together again by these hooking actions.

In such a state, when the output shaft member 33 is rotated in the reverse direction, the rotational force is directly transmitted to the casing 42, so that the rotational force is not changed in the process, and this rotational force is the second sun gear. Since the speed is changed by one step only in the process of being transmitted to the casing 43 by the 421 and the second planetary gear 434, the transfer screw 13 is rotated in the reverse direction quickly, so that the moving jaw 14 is rapidly moved in the backward direction.

Needless to say, the present invention is not limited to the configuration of the above-mentioned embodiment, and can be appropriately modified without departing from the spirit of the present invention.

[0043]

As described above, the vise of the present invention is capable of adjusting the forward / backward moving speed of the moving jaw and the clamping force, and is strong enough to firmly clamp the workpiece so that it does not move during the machining operation. Since a large clamping force is obtained by the action of the rotational force transmission mechanism and the speed change mechanism without hitting the handle with a separate tool, it is very convenient and easy to use. Also, after the workpiece has been firmly clamped to the state required for the machining operation,
Since the continuous transmission of the rotational force is blocked by the action of the rotational force transmission mechanism, the vice itself and the workpiece are prevented from being subjected to an excessive clamping force more than necessary, which may damage the vice or the workpiece. It can be prevented from being damaged. Further, it can be supplied at a lower price than the conventional hydraulic vise, and since the clamping state is not released arbitrarily, it is safe and the risk of accidents is eliminated.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a vise according to an embodiment of the present invention in use.

FIG. 2 is an extracted exploded perspective view of a torque transmission mechanism and a speed change mechanism according to an embodiment of the present invention.

FIG. 3 is an extracted exploded perspective view of the input / output shaft member of the torque transmission mechanism according to the embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 5 is a side sectional view showing a state in which the rotational force transmitting mechanism and the transmission mechanism according to the embodiment of the present invention have moved backward.

FIG. 6 is a side sectional view showing a state in which the rotational force transmission mechanism has been moved forward.

FIG. 7 is a side sectional view showing a state in which the input / output shaft member of the rotational force transmission mechanism is separated.

8A is a sectional view taken along line BB in FIG. 5, and FIG. 8B is a sectional view taken along line CC in FIG.

[Explanation of symbols]

 10 Main Body 11 Fixed Jaw 13 Slide Body 14 Moving Jaw 15 Transfer Jaw 30 Rotational Force Transmission Mechanism 31 Housing 32 Input Shaft Member 33 Output Shaft Member 34,46 Spring Member 35 Key Groove 36 Key 40 Speed Change Mechanism 41 Planetary Gear Housing 42,43 Casing 45 Ball 332 First rotating sun gear 333 Hooking groove 334 Hooking collar 335 Ball moving path 351,361 Flat end surface 352,362 Curved surface 411 Fixed sun gear 421 Second rotating sun gear 422,432 Shaft coupling port 423 , 433 Gear installation hole 425 First planetary gear 431 Transmission shaft 434 Second planetary gear

Claims (9)

[Claims] 1. A slide body 13 provided on a front end surface of a moving jaw 14 for clamping a workpiece together with a fixed jaw 11 is moved forward and backward on a main body 10 by forward and reverse rotations of a transfer screw 15. The input / output shaft member 3 that transmits or blocks the rotational force of the power mechanism 20 for rotating the transfer screw 15 in the forward or reverse direction.
The rotary force transmission mechanism 30 including the second and the third rotary shafts 33 is provided between the rear end surface of the slide body 13 and the rotary force transmission mechanism 30. Alternatively, a speed change mechanism 40 including first and second planetary gear devices that adjust the moving speed and the clamping force of the moving jaws 14 by transmitting the speed to the transfer screw 15 in two stages, and the rotational force of the output shaft member 33. Is directly transmitted to the casing 42 of the first planetary gear device, and the output shaft member 33 and the casing 42 are provided with a hooking device for hooking these so as to rotate together. 2. The rotating force transmitting mechanism 30 comprises a housing 31 having a spiral 312 formed inside a tip portion thereof.
A first sun gear 332 is formed at the front end, and a spiral 331 that is coupled to the spiral 312 of the housing 31 is formed at the rear end.
An output shaft member 33 having a key 36 is formed on the rear end surface, and a key groove 35 with which the key 36 is meshed is formed at the front end.
An input shaft member 32 having a coupling groove 332 of the power mechanism 20 at a rear end portion thereof, and a support flange 32 provided at a tip end side of the input shaft member 32.
The vice according to claim 1, which is configured to include a spring member 34 that is elastically provided between the inner surface of the housing 31 and a rear end inner surface of the housing 31. 3. The key groove 35 and the key 36,
3. A plurality of output shaft members 32, 33 are provided at predetermined intervals on the same cylinder on the front and rear end faces thereof.
Vise described in. 4. A flat end surface 351.361 is formed on one surface of the key groove 35 and the key 36, that is, a surface on the forward rotation direction side of the input / output shaft members 32, 33, and another surface, that is, a reverse rotation direction. The vice according to claim 2 or 3, wherein the side surface is formed to be curved surfaces 352 and 362. 5. The first planetary gear device of the speed change mechanism 40 comprises a first rotary sun gear 332 formed at the tip of the output shaft member 33 and a planetary gear fixed to the rear end of the slide body 13. A fixed sun gear 411 that is annularly provided on the inner peripheral surface of the housing 41, a casing 42 that is rotatably provided by inserting a front end portion into the rear end portion of the planetary gear housing 41, and outputs to the center of the rear surface of the casing 42. A shaft coupling port 4 which is recessed to couple the tip end of the shaft member 32.
22, the inner peripheral surface of the coupling port 422 and the casing 4
Two gear end holes 423, which are formed at a predetermined interval so as to pass through between the outer end surfaces of the two, and are exposed to the outside of the above-mentioned hole 423 are fixed sun gears 411 on the inner peripheral surface of the planetary gear housing 41. The first planetary gear 4 has a portion exposed to the inside that meshes with the first rotating sun gear 332 formed at the tip of the output shaft member 33 when the output shaft member 33 advances.
25, the second planetary gear device includes a second rotary sun gear 421 projectingly provided on the front surface of the casing 42, and an axial coupling for coupling the second rotary sun gear 421 to the center of the rear surface. Mouth 4
32 is recessed, and the transfer screw 15 is provided at the center of the front surface.
Casing 4 with transmission shaft 431 coupled to rear end face
3, and a gear installation hole 433 formed at a predetermined interval so as to penetrate between the outer peripheral surface of the casing 43 and the inner peripheral surface of the shaft coupling opening 432, and is exposed to the outside of the installation hole 433. A part of the inner surface of the planetary gear housing 41 is in mesh with the rotary sun gear 411, and a part of the inner exposed surface is a second planetary gear 434 in mesh with the second rotary sun gear 421. The vice according to claim 1, characterized in that 6. The output shaft member 33 comprises the hooking device.
Ball catching groove 333 recessed in the outer peripheral surface on the tip side of the
And a part of the ball mounting hole 427 is inserted into a ball mounting hole 427 that is formed so as to penetrate from the outer peripheral surface of the rear end portion of the casing 42 to the inner peripheral surface of the shaft coupling port 422 of the casing. 2. A ball 45 penetrating the inner end of the ball 45 so as to be exposed to the shaft coupling port 422 side, and a spring member 46 for urging the ball 45 so as to be exposed to the shaft coupling port 422 side. Vise described in. 7. The ball hooking groove 3 of the output shaft member 33.
7. A ball hooking collar 334 is provided at a position on the rear side of 33, and a ball moving path 335 connecting these is formed between the ball hooking groove and the hooking collar. Vise described in. 8. The ball moving path 335 is connected to the ball hooking groove 333 from the tip end thereof to the ball hooking collar 3.
8. The vise according to claim 7, wherein the vise is gradually shallower and narrower toward the rear end connected to 34. 9. The ball moving path 335 is connected to the ball hooking groove 333 from the tip end thereof to the ball hooking collar 3.
The vice according to claim 7 or 8, wherein the vice is formed so as to be inclined toward the moving direction of the output shaft member 33 when the output shaft member 33 is rotated in the reverse direction toward the rear end connected to the vice.