JP3058411U - Rotary knob switching device capable of 360-degree bidirectional rotation of electric tools - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a rotary knob switching device capable of rotating a power tool 360 degrees in two directions. A power tool is provided with one turning knob, and a fixed component, a rotating component, a washer, an elastic component, a sleeve, and a plurality of balls are sequentially provided between the turning knob and a driving device of the power tool. A rotating part is coupled to the rotating knob and is driven by the rotating knob to rotate, and the rotating part is provided with a plurality of arc-shaped cams, and a convex part is provided at a position corresponding to the cam of the fixed part. Even if the turning knob is turned in either the forward direction or the reverse direction, the rotating component is driven and rotated, and the cam of the rotating component and the convex portion of the fixed component are pressed against each other, and the washer and the elastic component are attached to the rotating component. The force of the compression is transmitted to the ball via the sleeve, and the ball compresses the action device inside the power tool to perform switching adjustment of the torque of the output shaft.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a rotary knob switching device capable of rotating a power tool 360 degrees in two directions, and more particularly to a device that can adjust the torque of the output shaft of the power tool when the rotary knob is rotated forward or reverse at 360 degrees.

[0002]

[Prior art]

 A well-known torque-adjustable power tool is provided with one turning knob outside the output shaft, and a mechanism in a tool main body is interlocked with the turning knob to adjust the torque of the output shaft. An indicator line is provided on the surface of the power tool, and a scale and a number are provided on the surface of the power tool to indicate the torque level. When it is desired to adjust the torque to the required level, turning can be achieved by turning the turning knob. By adjusting to the numbers, you can know the torque that has been obtained. However, none of the conventional torque adjustment turning knobs can perform 360-degree rotation, that is, the rotation direction is only from the low torque level to the high torque level, and once the torque is turned from the high torque level to the low torque level. When adjusting to the torque level, it is necessary to rotate to the origin and then return to the required torque level, so the required rotation angle increases and operation is inconvenient.

[0003]

[Problems to be solved by the invention]

 SUMMARY OF THE INVENTION It is an object of the present invention to provide a kind of rotary knob switching device capable of rotating a power tool 360 degrees in two directions, in which a turning knob used for adjusting an output shaft torque can rotate 360 degrees forward and reverse. Therefore, the output shaft torque can be adjusted, and switching from high torque to low torque or from low torque to high torque can be quickly performed, which is convenient.

[0004]

[Means for Solving the Problems]

 The invention of claim 1 includes the power tool 1, the sleeve 2, the elastic component 3, the washer 4, the rotating component 5, the fixed component 6, and the turning knob 7, and the cylinder 10 is fixed to the front end of the power tool 1. An output shaft 11 penetrates a center hole provided in the cylindrical body 10 and projects forward, and a plurality of holes 12 penetrating into the power tool 1 are provided in the power tool 1 at the root position of the cylindrical body 10. One ball 13 is placed in each of the holes 12, the sleeve 2 is axially mounted on the above-mentioned cylinder 10, and the sleeve 2 and the cylinder 10 are relatively rotatable. The rear end of the sleeve 2 comes into contact with the ball 13, and the elastic component 3 comes into contact with the sleeve 2 so as to be interposed between the cylinder 10 and the sleeve 2. The washer 4 is axially mounted on the cylindrical body 10 and It comes into contact with the front end, so that the relative rotation between the washer 4 and the cylinder 10 is not possible, and the relative movement in the relative axial direction is possible. A plurality of arc-shaped cams 51 are provided on the front surface of the rotating component 5 and a plurality of convex pieces 52 are provided around the outer ring thereof. 6 is mounted on the cylindrical body 10 in the axial direction so as to be unable to rotate relative to the cylindrical body 10, and is provided on the rear surface of the fixed part 6 at a position corresponding to the position of the cam 51. The turning knob 7 is provided with a sliding groove 71 which is combined with the above-mentioned convex piece 52 of the rotating component 5 in the axial direction of the inner wall thereof, and the convex piece 52 is movable in the sliding groove 71. Thus, the turning knob 7 is combined with the electric power tool 1, whereby the turning knob is moved in the forward or reverse direction. By rotating the rotary member 7, the rotary component 5 is rotated, and the cam 51 of the rotary component 5 and the convex portion 61 of the fixed component 6 press against each other, and the rotary component 5 presses the washer 4 and the elastic component 3 to press them. When the force is transmitted to the ball 13 via the sleeve 2, the ball 13 presses the driving device inside the electric tool 1, so that the torque of the output shaft 11 is switched and adjusted. It is a rotary knob switching device that can rotate 360 degrees in two directions for an electric tool consisting of:

According to a second aspect of the present invention, the outer diameter of the cylindrical body 10 is non-circular, and both the washer 4 and the fixed component 6 have positioning holes 40 and 60 corresponding to the front end shape of the cylindrical body 10. The power tool according to claim 1, wherein the washer (4) and the fixed part (6) are relatively non-rotatable and relatively movable in the axial direction when assembled to the cylinder (10). It is a rotary knob switching device that can rotate in the direction.

According to a third aspect of the present invention, a plurality of convex portions 41 are provided on the front surface of the washer 4, and annular teeth are provided on the rear surface of the rotating component 5 at positions corresponding to the convex portions 41 of the washer 4. The rotation of the power tool according to claim 1, wherein the positioning is performed by the locking action of the annular teeth and the convex portions 41 when the rotating component 5 rotates. It is a knob switching device.

[0007]

[Embodiment of the invention]

 The rotary knob switching device capable of rotating the power tool 360 degrees in two directions according to the present invention is provided with one turning knob on the power tool, and a fixed component, a rotary component, and a rotating component are provided between the turning knob and the driving device of the power tool. A washer, an elastic part, a sleeve, and a plurality of balls are sequentially provided. The rotating part is connected to the rotating knob and driven by the rotating knob to rotate, and the rotating part is provided with a plurality of arc-shaped cams. And a convex portion is provided at a position corresponding to the cam of the fixed component, and when the turning knob is turned in either the forward direction or the reverse direction, the rotating component is driven and rotated to rotate the cam of the rotating component. The fixed parts and the convex parts of the fixed parts push each other to press the washer and the elastic part against the rotating parts, and the force of this compression is transmitted to the ball via the sleeve, and the ball presses the action device inside the power tool and the torque of the output shaft It is to perform the switching regulator of.

[0008]

【Example】

 As shown in FIG. 1 and FIG. 2, the rotary knob switching device provided by the present invention, which can rotate in two directions by 360 degrees, includes a power tool 1, a sleeve 2, an elastic part 3, a washer 4, a rotary part 5, The fixed component 6 and the turning knob 7 are included.

A non-circular cylindrical body 10 is fixed to the front end of the power tool 1 (in the present embodiment, has a substantially triangular shape), and an output shaft 11 protrudes through a center hole provided in the cylindrical body 10. A plurality of holes 12 penetrating into the power tool 1 are provided in the power tool 1 at the root position of the cylindrical body 10, and one ball 13 is placed in each of the holes 12. The ball 13 contacts a turntable (not shown) of a drive mechanism inside the power tool 1. Since the driving mechanism is not related to the emphasis of the claims of the present invention, the description is omitted here. The sleeve 2 is a tubular body having a circular shape and a circular inner hole, which is directly mounted on the tubular body 10 in the axial direction, and one end of which contacts a ball 13 placed in the hole 12 described above. A preferred embodiment of the elastic part 3 is a compression spring, which is directly encased in the above-mentioned cylinder 10 and contacts the above-mentioned sleeve 2. The washer 4 is provided with a positioning hole 40 corresponding to the shape of the end of the cylindrical body 10, and a plurality of convex portions 41 are formed on the front surface of the washer 4. The elastic member 3 is in contact with the above-mentioned elastic component 3 so that the relative rotation between the washer 4 and the cylindrical body 10 is not possible and the relative axial movement is possible. The rotating part 5 is formed as a circular cylindrical body, and has a circular inner hole, and is inserted into the cylindrical body 10 by the inner hole so that the rotating part 5 and the cylindrical body 10 can be relatively rotated. A plurality of arc-shaped cams 51 are provided on the front surface of the rotating component 5, and the cams 51 are spirally arranged (see FIG. 4), and correspond to the convex portions 41 of the washer 4 on the rear surface. The annular teeth 53 (refer to FIG. 3) are provided at the positions corresponding to each other, and a plurality of convex pieces 52 are provided around the outer ring. The fixing component 6 includes a positioning hole 60 having a shape corresponding to the end of the above-described cylinder 10. After the positioning hole 60 is inserted into the cylinder 10, the relative position between the fixing component 6 and the cylinder 10 is relatively large. A plurality of protrusions 61 are provided on the rear surface of the fixed component 6 at positions corresponding to the respective cams 51, and the protrusions 61 are spirally arranged. (See FIG. 5). The inner wall of the turning knob 7 is provided with a plurality of sliding grooves 71 in the axial direction that are combined with the above-mentioned convex pieces 52 of the rotating component 5. When the turning knob 7 is assembled with the power tool 1, The convex piece 52 is accommodated in the slide groove 71 (see FIG. 2).

With the above structure, the rotating knob 5 is rotated by rotating the turning knob 7 in the forward or reverse direction, so that the cam 51 of the rotating component 5 and the convex portion 61 of the fixed component 6 are pressed against each other and fixed. Since the part 6 is located at the inner bottom end of the revolving knob 7 and cannot be rotated, when the rotating part 5 rotates, the convex portion 61 presses the cam 51 to apply the washer 4 and the elastic part to the rotating part 5. 3 is generated, and this pressing force is transmitted to the sleeve 2 and further transmitted from the sleeve 2 to the ball 13. Since the ball 13 is in contact with the rotating plate of the drive mechanism inside the electric tool 1, As the force acting on the rotating disk of the ball 13 increases, the resistance of the rotating disk increases, and therefore the torque of the output shaft 11 increases. The torque of the output shaft 11 decreases as the force acting on the rotating disk of the drive mechanism by the opposite ball 13 decreases. Thus, the purpose of torque adjustment is achieved. Further, according to the design of the present invention, the cam 51 of the rotating part 5 is arranged in a spiral pattern and the projection 61 provided on the fixed part 6 is also arranged in the spiral pattern. When the rotating part 5 is rotated to a fixed angle, the peaks of the cam 51 and the convex portion 61 come into contact with each other, the ball 13 receives the maximum acting force, and a high torque can be obtained. Since 61 falls to the lowest point of the cam 51, the acting force received by the ball 13 is minimized, and a low torque can be obtained. In other words, switching between high torque and low torque is controlled by forward and reverse rotation, and can also be obtained by resetting by continuing forward rotation or by continuously resetting reverse rotation. Convenient and very practical.

[0011]

[Effect of the invention]

 In the present invention, the switching between high torque and low torque is controlled by the forward / reverse rotation of the turning knob 7, and can be obtained by continuously resetting the normal rotation or by continuously resetting the reverse rotation. Can be very convenient and very practical in its operation.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of the present invention.

FIG. 2 is a local sectional view after the combination of FIG. 1;

FIG. 3 is a perspective view of the rotating part and the fixed part according to the present invention, viewed from another angle.

FIG. 4 is a view showing an arrangement position of cams provided on the rotating part of the present invention.

FIG. 5 is a view showing an arrangement position of protrusions provided on the fixed component of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric tool 10 Cylindrical body 11 Output shaft 12 hole 13 Ball 2 Sleeve 3 Elastic part 4 Washer 40 Positioning hole 411 Convex part 5 Rotating part 51 Cam 52 Convex piece 53 Ring tooth 6 Fixed part 60 Positioning hole 7 Rotating knob 71 Sliding groove

Claims (3)

[Utility model registration claims] A power tool, a sleeve, an elastic part,
The power tool 1 includes a washer 4, a rotating component 5, a fixed component 6, and a turning knob 7.
A plurality of holes 12 penetrating into the power tool 1 are provided in the power tool 1 at the root position of the cylindrical body 10, and the output shaft 11 projects forward through the center hole provided in the power tool 1. One of the balls 13 is placed in each of the sleeves. The sleeve 2 is axially wrapped around the above-described cylinder 10 so that the sleeve 2 and the cylinder 10 can be relatively rotated. The elastic member 3 comes into contact with the sleeve 2 so as to be interposed between the cylinder 10 and the sleeve 2, and the washer 4 The elastic member 3 is in contact with the front end of the elastic component 3 in the direction, and the relative rotation between the washer 4 and the cylindrical member 10 is not possible and the relative axial direction can be moved. Is mounted on the cylindrical body 10 in the direction, and can be rotated relative to the cylindrical body 10 and moved in the relative axial direction. A plurality of arc-shaped cams 51 are provided on the front surface of the rotary component 5 and a plurality of convex pieces 52 are provided around the outer ring thereof. The fixed component 6 is attached to the cylindrical body 10 in the axial direction. , And cannot be rotated relative to the cylindrical body 10.
The turning knob 7 is provided with the above-described rotating component 5 in the axial direction of the inner wall thereof.
A sliding groove 71 combined with the convex piece 52, the convex piece 52 is movable in the sliding groove 71, and the turning knob 7 is combined with the electric power tool 1. By rotating the rotary knob 7 in the direction, the rotating part 5 is rotated, and the cam 51 of the rotating part 5 is rotated.
And the convex portion 61 of the fixed component 6 press against each other, and the rotating component 5
Presses the washer 4 and the elastic component 3, and the pressing force is transmitted to the ball 13 via the sleeve 2,
The switching control of the torque of the output shaft 11 is performed by the ball 13 pressing the drive device inside the power tool 1, and the rotary knob switching device capable of rotating the power tool 360 degrees in two directions by the above configuration. . 2. The cylindrical body 10 has a non-circular outer diameter, and both the washer 4 and the fixed component 6 are provided with positioning holes 40 and 60 corresponding to the front end shape of the cylindrical body 10. The power tool 360 according to claim 1, wherein when the fixed component 6 and the fixed component 6 are combined with each other, the relative rotation is disabled and the axially movable component is relatively non-rotatable.
Rotary knob switching device that can rotate in two directions. 3. A plurality of projections 4 on the front surface of said washer 4.
1 and the washer 4 on the rear surface of the rotating part 5
The annular teeth are provided at positions corresponding to the convex portions 41, and when the rotating component 5 rotates, positioning is performed by the locking action of the annular teeth and the convex portions 41. Rotary knob switching device capable of rotating the power tool 360 degrees in two directions.