JPH078122Y2 - Vibrating tool holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a vibrating tool holding device, and more particularly to a vibrating tool holding device capable of converting a rotational force into vibration in an arbitrary direction.

<Prior Art and Problems to be Solved by the Invention> Conventionally, as a vibrating tool holding device mounted on an industrial robot or the like, a vibrating tool holding device having a configuration shown in FIGS. 5 (A) to (D) has been proposed. .

In this vibrating tool holding device, a rotation shaft (51) having an eccentric shaft (52) at its tip is housed in a base casing (53) so as to be rotatable, and the rotation shaft (51) is removed from the base casing (53). It has an auxiliary casing (54) that surrounds the protruding part of the
It is integrated with the base casing (53) by a). Further, the tool holding shaft (56) is housed in the front casing (55) having the base portion fitted in the auxiliary casing (54) so as to be slidable only in one direction. This tool holding shaft (5
At the base of (6), there is a long hole (5) that engages with the eccentric shaft (52).
7) is formed, and the front casing (55) is fitted into the auxiliary casing (54) in a state where the eccentric shaft (52) and the elongated hole (57) are engaged with each other. The tool holding shaft (56) can be reciprocated in one direction following the rotation. Incidentally, (58) is a bearing.

Furthermore, the auxiliary casing (54) is provided with a bolt (59) for cutting the side plate at a predetermined position and forcibly bringing the cut portion (54b) into contact with the auxiliary plate (54).

In the vibrating tool holding device having the above configuration, the eccentric shaft (5
2) and the long hole (57) are engaged, and the tool holding shaft (56)
Is accommodated in the front casing (55) slidably only in one direction, the rotational force is converted into reciprocating motion, and the tool mounted on the tool holding shaft (56) reciprocates, that is, vibrates. be able to. Also, if you want to change the vibration direction of the tool, loosen the bolts (59) to slightly expand the auxiliary casing (54) and expand the front casing (55).
It would be better to make it easier to rotate.

However, since the auxiliary casing (54) is integrated with the base casing (53) by tightening bolts (54a) over almost the entire range, even if the bolt (59) is loosened, it hardly expands. It is almost impossible to rotate the casing (55), and it is impossible to change the vibration direction. Therefore, in reality, not only the bolt (59) must be loosened, but also the tightening bolt (54a) must be loosened, which causes a problem that the work for changing the vibration direction becomes considerably complicated.

<Purpose of Invention> This invention was made in view of the above problems,
An object of the present invention is to provide a new vibrating tool holding device capable of changing the vibration direction by a simple operation.

<Means for Solving the Problems> In order to achieve the above-mentioned object, a vibrating tool holding device of the present invention has a cylindrical base portion of a front casing that accommodates a tool holding shaft so as to reciprocate only in one direction. It is housed in a large-diameter opening of a base casing that rotatably houses a rotating shaft having an eccentric shaft at its tip, and the large-diameter opening has at least one recess that reduces the contact area with the cylindrical base. In addition, the tubular base pressing member is housed in a space formed at a predetermined position different from the recess so that the cylindrical base pressing member can move forward and backward, and the cylindrical base pressing member presses the cylindrical base to press it. It has a pressure applying member.

<Operation> With the vibrating tool holding device having the above configuration, when the vibration direction is changed by rotating the front casing that accommodates the tool holding shaft so that the tool holding shaft can reciprocate only in one direction, the pressing force applying member The cylindrical base pressing member only needs to be retracted by the above, and the contact area between the base casing and the cylindrical base is reduced due to the formation of the recess, so the front casing can be easily rotated. Can be made.

Then, after rotating the front casing in a desired direction, the cylindrical base pressing member may be pushed in by the pressing force applying member, and the rotation of the front casing can be prevented.

Therefore, even when the large-diameter opening forming member is integrated with the base casing by a fastening bolt or the like, it is not necessary to loosen the fastening bolt and re-tighten after rotating the front casing, and change the vibration direction. The work can be significantly simplified.

<Examples> Hereinafter, detailed description will be given with reference to the accompanying drawings illustrating examples.

FIG. 1 is a central longitudinal sectional view showing an embodiment of the vibrating tool holding device of the present invention, FIG. 2 is a plan view, and FIG. 3 is III- of FIG.
III line sectional view, FIG. 4 is a IV-IV line sectional view of FIG. 1,
A base casing (2) that rotatably accommodates a rotating shaft (1) having an eccentric shaft (1a) at the tip and a tool holding shaft (3) that holds a tool (not shown) can reciprocate in only one direction. And a front casing (4) to be housed in.

The base casing (2) has an auxiliary casing (2a) integrated at its tip with a tightening bolt (2b), and accommodates the rotating shaft (1) rotatably via a bearing (2c). In addition, a large-diameter space for accommodating the front casing (4) is provided between the bearing (2c) and the auxiliary casing (2a). Then, as shown in FIG. 3, the inner peripheral surface of the auxiliary casing (2a) is approximately 120
Grooves (2d) having a considerably wide width are formed at intervals of °, and deep grooves (2e) deeper than the grooves (2d) are formed between any of the grooves. A pressing member (2f) for pressing the front casing (4) is housed inside the deep groove (2e) so as to be able to move forward and backward, and a pressing force for advancing the pressing member (2f) is further applied. A screw shaft (2g) as an applying member is attached to the auxiliary casing (2a).

The tool holding shaft (3) has a protruding shaft (3b) extending at a right angle from the center of the rectangular base (3a), and is provided on the surface of the base (3a) opposite to the protruding shaft (3b). An elongated hole (3c) that engages with the eccentric shaft (1a) is formed in the center. The front casing (4) has a storage quality (4a) that stores the base (3a) so that the base (3a) can reciprocate only in one direction, and a cylindrical base (which is stored in the large-diameter space ( 4b). The tubular base (4b) has a groove (4c) for engaging with the pressing member (2f) over the entire surface. Incidentally, (4d) is a bearing for slidably supporting the base portion (3a) of the tool holding shaft (3).

The operation of the vibrating tool holding device having the above configuration is as follows.

If the rotating shaft (1) is rotated by driving a motor (not shown), the eccentric shaft (1a) rotates, so that the tool holding shaft (3) reciprocates in one direction restricted by the accommodation chamber (4a). Move. Therefore, by appropriately determining the rotation speed of the rotating shaft (1), it is possible to vibrate a tool such as a grindstone held by the tool holding shaft (3).

When it is necessary to change the vibration direction of the tool, screw the screw shaft (2g) back and forth to move the pressing member (2g).
It suffices to release the pressure contact state of the tubular base (4b) of f), and the contact area between the tubular base (4b) and the auxiliary casing (2a) is greatly reduced by the groove (2d). Therefore, the tip casing (4) accommodating the tool holding shaft (3) can be easily rotated. Then, after rotating the tool holding shaft (3) by a desired angle, the pressing member (2f) is pressed into the groove (4c) of the cylindrical base (4b) by screwing the screw shaft (2g). Well, since the cylindrical base portion (4b) is clamped and held by the portion remaining between the grooves (2d) of the auxiliary casing (2a) and the pressing member (2f),
The front casing (4) accommodating the tool holding shaft (3) can be fixed so as not to rotate.

As is clear from the above description, it is not necessary to loosen the tightening bolt (2b) at all, and it is sufficient to simply move the screw shaft (2g) back and forth. Therefore, the vibration direction of the vibrating tool with respect to the base casing (2) can be easily changed. Can be changed.

Further, as the tool held by the tool holding shaft (3), as long as it is possible to perform an initial work by vibrating within a predetermined range and moving the entire tool based on a preset locus. Well, various work tools such as a grindstone can be attached.

The invention is not limited to the above-described embodiment, and for example, one or two grooves (2d) adjacent to the deep groove (2e) can be omitted. In this case, the pressing member can be omitted. (2f) allows the tubular base (4) of the front casing (4)
It is possible to block the rotation of the front casing (4) by strongly pressing b) to the inner peripheral surface near the remaining groove (2d). Further, it can be applied to a vibrating tool holding device in which the base casing (2) and the auxiliary casing (2a) are integrally formed, and various design changes can be made within the scope of the invention. .

<Effect of device> As described above, this device not only can hold a tool to be vibrated within a predetermined stroke range,
The vibration direction can be changed by a simple operation, and further, the size can be reduced as a whole, so that a unique practical effect that interference with the work can be reduced can be achieved.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view showing an embodiment of the vibrating tool holding device of the present invention, FIG. 2 is a plan view, FIG. 3 is a sectional view taken along the line III-III of FIG. 1, and FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 5, and FIG. 5 is a schematic view showing a conventional vibrating tool holding device. (1) …… Rotary shaft, (1a) …… Eccentric shaft, (2) …… Base casing, (2a) …… Auxiliary casing, (2d) ……
Groove, (2f) ... pressing member, (2g) ... screw shaft as pressing force applying member, (3) ... tool holding shaft, (4) ... front casing, (4b) ... tubular base

Claims (1)

[Scope of utility model registration request] 1. A base casing (2) which rotatably accommodates a rotary shaft (1) having an eccentric shaft (1a) at its tip,
In a vibrating tool holding device having a tip casing (4) which accommodates a tool holding shaft (3) whose base engages with an eccentric shaft (1a) so as to reciprocate only in one direction, The tubular base (4b) is housed in the large diameter opening (2a) of the base casing (2), and the large diameter opening (2a) is also included.
Has at least one recess (2d) that reduces the contact area with the cylindrical base (4b), and further presses the cylindrical base into a space formed at a predetermined position different from the recess (2d). The member (2f) is housed so as to be able to move forward and backward, and also has a pressing force applying member (2g) that presses the cylindrical base pressing member (2f) so as to press the cylindrical base (4b). Characteristic vibrating tool holding device.