JP3066194U - Knob switching device - Google Patents

Abstract

(57) [Problem] To provide a knob switching device for an electric tool, in which the rotation of a knob at 360 ° C. can perform simple rotation of an output shaft or switching adjustment of rotation accompanied by vibration. A switching pedestal provided inside a speed reduction box has a plurality of switching concave teeth arranged at appropriate intervals on two circumferences on an axial direction surface thereof, and the same side as the switching concave teeth is formed. The switching convex teeth installed on the switching part correspond to this, and the two mesh with each other. When the switching part rotates in conjunction with the switching part, the engagement and disengagement of the switching convex tooth and the switching concave tooth always average. Control of the output shaft in the axial direction, and determines whether the vibrating part fixed to the output shaft meshes with the vibration pedestal when the output shaft rotates to generate vibration. it can.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a knob switching device. In particular, a knob that rotates at 360 ° C simply switches the rotation of the output shaft of the power tool with rotation or vibration, and its structure is simpler and less costly than conventional ones. A switching device.

[0002]

[Prior art]

 Conventional power tools for driving screwdrivers, drills, etc., simply rotate. However, some objects could not be easily drilled or removed because the material was too hard or the screws were tightly tightened. For this reason, later developed power tools were able to switch the rotation of the output shaft between simple rotation and rotation with vibration. When the output shaft rotates while vibrating, the drill can easily enter the object and loosen the tightly tightened screws to remove them. However, this has the disadvantage that the number of parts used is large and the overall structure is relatively complex, which increases costs.

[0003]

[Problems to be solved by the invention]

 SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a knob switching device so that the rotation of the knob at 360 ° C. enables simple adjustment of the rotation of the output shaft or rotation with vibration.

[0004]

[Means for solving the invention]

 A switching pedestal is fixed in the speed reduction box, and a plurality of switching concave teeth arranged at appropriate intervals on the circumference of the two streaks are provided on an axial surface of the switching pedestal. The side forms an oblique side, and a plurality of switching convex teeth corresponding to the switching concave teeth are provided on the axial surface of the switching component corresponding to the switching pedestal. The meshing or disengagement of the switching concave teeth and the switching convex teeth can be controlled by an appropriate force, and the amount of movement of the output shaft in the axial direction is controlled. It is characterized in that it is determined whether to engage with the vibration pedestal to activate the action of vibration.

[0005]

[Explanation of implementation of the invention]

 As shown in FIGS. 1 and 2, the knob switching device of the present invention includes a speed reduction box 1, and has a hollow penetrating cylindrical portion 11 at one end of the speed reduction box 1. The portion forms an inner edge 112, and a plurality of axially parallel inner grooves 113 are provided on the circumference of the inner edge 112, and a plurality of axially parallel outer grooves are formed on the outer wall surface of the cylindrical portion 11. A vibration pedestal 48 is provided at the rear end of the deceleration box 1. The vibration pedestal 48 is fixed to both ends when the cylindrical portion 11 is fitted into the inner diameter of the deceleration box 1. Is formed integrally with an annular knurled portion 481. The one 12, the spring 13 and the thrust ring 14 are fitted in this order on the outer diameter of the cylindrical portion 11 of the deceleration box 1, and the annular convex edge 121 is provided at the rear end of the one 12, and the inner diameter thereof corresponds to the outer groove 111. Projection 122 is provided. When the protrusion 122 is slid along the outer groove 111 and the one 12 is fitted into the cylinder 11, the one 12 cannot rotate with respect to the cylinder 11. When the spring 13 is fitted into the cylindrical portion 11, one end of the spring 13 comes into contact with the convex edge 121 of the one 12. A projection 141 is provided on the outer surface of the thrust wheel 14, and three circles having different outer diameters are formed at the front end of the thrust wheel 14, each of which has a continuous spiral trajectory having a different height. This spiral track forms a track bottom 142 and a track high portion 143. When the inner diameter of the thrust wheel 14 is fitted to the outer diameter of the tube portion 11, it contacts the other end of the spring 13, and the thrust wheel 14 is brought into contact with the tube portion 11. You can now rotate.

The output shaft 3 installed on the inner diameter of the reduction box 1 has a spring 41, a ball pusher 42, a ball bearing 44, a switching component 45, a switching pedestal 47, and a vibration component 47 fitted in this order in front and rear thereof. The vibrating part 46 is fixed to the output shaft 3, and the knurled part 46 installed on the circumference at the rear end engages with the knurled part 481 of the vibration pedestal 48, and the vibrating part 46 is completely inserted into the through hole of the speed reduction box 1. Fit inside. The pedestal part 471 of the switching pedestal 47 has a plurality of projections 473 projecting in a streak shape on the outer peripheral surface, and two switching concave teeth 472 are provided at the front end, and the projection 473 of the switching pedestal 47 has an inner groove. When the switch pedestal 47 is inserted into the through hole of the speed reduction box 1, the switching pedestal 47 is fixed so as not to rotate in the speed reduction box 1, and the vibration component 46 is located inside the front end of the through hole of the speed reduction box 1. Corresponding. At the rear end of the switching part 45, switching convex teeth 452 are arranged on the circumference thereof and correspond to the switching concave teeth 472, and the side of the installation of the switching convex teeth 452 forms an oblique side (see FIG. 5). ). Two ball pushes 42 and 44 are provided on both sides of the ball bearing 43, and these are housed in a switching part 45. The spring 41 abuts on both between the ball push 42 and the convex edge of the output shaft 3, and the elasticity of the spring 41 with respect to the ball push 42 causes the switching convex teeth 452 of the switching part 45 to always be in axial contact with the switching seat 47. Make contact.

The switching device 2 provided at the front end of the speed reduction box 1 of the present invention includes a thrust wheel 14, a thrust upper plate 24, and a knob 5, and the thrust wheel 14 forms three circles having different outer diameters. , Each exhibit a continuous spiral path of different height. The spiral track forms a track bottom 142 and a track height 143, respectively. When the thrust wheel 14 is fitted around the outer periphery of the cylindrical portion 11 of the reduction box 1, the thrust wheel 14 can rotate freely here. become. The thrust upper plate 24 has a convex ring 241 at the front end, the inner diameter of the ring is large enough to fit into the outer diameter of the cylindrical portion 11 of the reduction box 1, and the convex ring 241 has a concave portion 242. At its rear end, there is provided a convex portion 243 corresponding to the three spiral trajectories of the thrust wheel 14, which also exhibits a spiral trajectory. Further, a link block corresponding to the outer groove 111 of the reduction box 1 is provided on the inner diameter of the thrust upper plate 24. When the thrust upper plate 24 is fitted in the cylindrical portion 11 and the link block 244 is engaged with the outer groove 111 of the cylindrical portion 11, the thrust upper plate 24 cannot be rotated in the cylindrical portion 11. And When the knob 5 is fitted over the thrust wheel 14 and the outside of the thrust upper plate 24 and the thrust wheel 14 is fixed to the inner edge thereof, the rotation of the knob 5 allows the rotation of the thrust wheel 14 to be controlled. When the knob 5 is rotated clockwise to rotate the thrust ring 14, the convex portion 243 of the thrust upper plate 24 follows the spiral path of the thrust ring 14 from the track lower section 142 to the track higher section 143 or the track. The movement from the high portion 143 to the low track portion 142 is performed, and the spring 13 is pushed to adjust the rotational force of the output shaft 3. At this time, the switching convex teeth 452 of the switching component 45 are switched, and are indented into the switching concave teeth 472 of the switching pedestal 47 to extend the spring 41. As shown in FIG. 2, a sufficient space is formed to allow movement in the axial direction, so that when the output shaft 3 is pressed against a screw or other element in the axial direction, the vibrating component 46 moves in the axial direction of the output shaft 3. The output shaft 3 moves along with the jagged portions 461 and the jagged portions 481 of the vibration pedestal 48, thereby causing an action of vibrating in the axial direction with the rotation of the output shaft 3. At this time, since the spring 13 acts in the forward direction to move the thrust wheel 14 forward, the force acting on the rear end of the spring 13 is reduced, and the output torsional stress is adjusted.

If the output shaft 3 is to perform only a simple rotation and does not want to generate an axial vibration, the knob 5 is rotated counterclockwise, and the thrust wheel 14 is interlocked with the rotation. The thrust wheel 14 rotates, and the spiral orbit of the thrust wheel 14 further restrains the convex portion 243 of the thrust upper plate 24, and the thrust upper plate 24 moves axially toward the front end until the convex portion 243 reaches the spiral orbit lower portion 142. . Further, the switching component 45 is driven to rotate, and the oblique side of the switching convex tooth 452 is separated from the switching concave tooth 472 of the switching pedestal 47. At this time, the switching component 45 compresses the spring 41 and switches with the convex edge of the output shaft 3. At the inner edge of the component 45, when the output shaft 3 is actuated in contact with a screw or other mechanical element, the output shaft 3 cannot move the vibrating component 46 in the axial direction in conjunction with the operation, Therefore, the output shaft 3 does not engage with the knurled portion 481 of the vibration pedestal 48, so that the output shaft 3 performs only a simple rotation, and does not involve vibration. Also, the plurality of switching convex teeth 452 and the switching concave teeth 472 arranged on the two circumferences respectively installed on the switching component 45 and the switching pedestal 47 can be detached from each other, but their axial faces are different. In addition, it has an average force received at the time of contact, so that stable rotation is performed.

[0009]

[Effects of the Invention] The plurality of switching concave teeth installed on the switching pedestal fixed in the deceleration box and the plurality of switching concave teeth installed on the switching parts correspond, and when the switching parts rotate in conjunction with each other, they always rotate. The engagement or disengagement of the switching concave teeth and the switching convex teeth can be controlled by the average force, and furthermore, it is controlled whether the vibrating part fixed to the output shaft meshes with the vibration pedestal when the output shaft rotates to activate the vibration action. As described above, a knob switching device for an electric tool that can switch between a simple rotation of the output shaft or a rotation accompanied by vibration by rotating the knob at 360 ° C. can be provided.

[Brief description of the drawings]

FIG. 1 is a three-dimensional exploded view of the present invention.

FIG. 2 is a sectional view when a knob is not switched.

FIG. 3 is a sectional view when a knob is switched.

FIG. 4 is a perspective view of the structure of the switching base and the switching component according to the present invention;

FIG. 5 is a cross-sectional view of the arrangement of the switching convex teeth of the switching component according to the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reduction box 11 Cylindrical part 111 Outer groove 112 Inner groove 12 One 121 Projection edge 122 Projection 13 Spring 14 Thrust ring 141 Projection 142 Track bottom 143 Track high part 2 Switching device 24 Thrust upper plate 241 Projection ring 243 Projection 244 Link block 3 Output shaft 41 Spring 42 Ball push 44 Ball push 43 Ball bearing 45 Switching part 452 Switching convex tooth 46 Vibrating part 461 Jagged part 47 Switching base 471 Pedestal part 472 Switching concave tooth 473 Projecting part 48 Vibrating base 481 Jagged part 5 Knob

Claims (1)

[Utility model registration claims] 1. A knob switching device mainly comprising a deceleration box, a switching device, and a switching pedestal, wherein the deceleration box has a cylindrical portion provided with a plurality of concave teeth at a circumferential end portion, and an outer diameter of the cylindrical portion. One end of the spring is fitted into the cylinder and at the same time abuts against the one, and the other end abuts the thrust wheel that rotates freely at the outside diameter of the cylinder, corresponding to the outside diameter of the reduction box. The vibration component fitted with the switching pedestal and the switching component, and fitted to the inner diameter of the deceleration box, has a jagged portion formed at one end of its circumference meshed with the jagged portion of the vibration pedestal, and a spring, a switching pedestal, a switching component, The vibration component and the vibration pedestal are fitted to the output shaft in this order, and then inserted into the inside diameter of the cylinder of the speed reduction box. The switching device mainly consists of a thrust wheel, a thrust upper plate and a knob, and the front end circle of the thrust wheel The circumference has several different outer diameters. A spiral orbit is formed in which the circles continuously show unequal heights, and when the thrust wheel is fitted on the outer diameter of the cylindrical portion of the reduction box, the thrust wheel can freely rotate here. It has a ring shape, the inner diameter of which fits exactly with the outer diameter of the cylindrical part, the two fit together, a concave part is provided at the front end, and a plurality of convex parts corresponding to the spiral orbit of the thrust ring are projected at the rear end. The knob is fitted on the outside of the thrust wheel to fix it, and a plurality of switching concave teeth arranged at an appropriate distance on two circumferences are provided on an axial surface of the switching pedestal. One side is a hypotenuse, and a switching convex tooth corresponding to a switching concave tooth is provided on two axial surfaces on an axial surface of the switching component,
As a result, when the switching pedestal and the switching component rotate mutually,
A knob switching device characterized in that meshing or disengaging of the switching convex teeth and the switching concave teeth can be controlled, and further, whether the switching pedestal is pushed in the axial direction can be controlled.