CN214980024U

CN214980024U - Rotary tightening and loosening mechanism of electric grinding machine

Info

Publication number: CN214980024U
Application number: CN202120163102.0U
Authority: CN
Inventors: 游立江
Original assignee: Nanping Zhichuang Technology Service Co ltd
Current assignee: Nanping Zhichuang Technology Service Co ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-12-03
Anticipated expiration: 2031-01-21

Abstract

The utility model belongs to the part of electronic polisher especially belongs to electronic polisher's rotatory elasticity mechanism. The utility model relates to an electronic polisher's rotatory elasticity mechanism, including shell, handle mesochite, handle ball overcoat, handle stainless steel main part, ball, handle ball endotheca, hollow main shaft, chuck, dish spring buckle, bolt before the handle, characterized by, the slide of the ball in the handle stainless steel main part is two sections line segment constitutions of different angles at least, and the horizontal contained angle of upper segment is less than the horizontal contained angle of hypomere. The utility model discloses change for a short time prior art, through the inclination to the slide of the ball in the handle stainless steel main part, at the first steep back of pine process design that slows down, reduce the rotation resistance of back end, reach laborsaving purpose, make ball and slide atress little simultaneously, difficult wearing and tearing are favorable to increase of service life.

Description

Rotary tightening and loosening mechanism of electric grinding machine

Technical Field

The utility model belongs to the part of electronic polisher especially belongs to electronic polisher's rotatory elasticity mechanism.

Background

The rotatory elasticity mechanism of electric sander is located electric sander's front end, its structure is shown in fig. 1, the part of mainly participating in the motion has handle protecgulum 1, handle mesochite 2, handle ball overcoat 3, handle stainless steel main part 5, ball 4, handle ball endotheca 6, hollow main shaft 7, chuck 8, dish spring 10, dish spring is detained 11, bolt 12, the bolt passes dish spring and is detained, hollow main shaft, the chuck is fixed three parts as an organic whole, hollow main shaft's pinhole is the slot hole, and dish spring detains, the pinhole of chuck is the round hole, consequently, can carry out relative axial displacement under the drive of bolt between chuck and the hollow main shaft, its theory of operation is: the handle ball outer sleeve 3 is driven to rotate by rotating the outermost handle front shell 1 to drive the handle middle shell 2, the handle ball inner sleeve 6 is driven to move by the balls 4 clamped in the handle stainless steel main body 5, a disc-shaped spring 10 is arranged outside the hollow main shaft, the upper side of the hollow main shaft abuts against the step surface of the hollow main shaft, the lower side of the hollow main shaft is connected with the upper end surface of a disc-shaped spring buckle, the disc-shaped spring buckle is sleeved in the handle ball inner sleeve 6, a gap is reserved between the contact surfaces of the disc-shaped spring buckle and the handle ball inner sleeve, the gap is the idle stroke of handle rotation, and the normal state of a rotation loosening mechanism of the electric grinding machine is a chuck clamping state, as shown in figure 1. The handle ball outer sleeve 3, the handle stainless steel main body 5, the ball 4 and the handle ball inner sleeve 6 change rotation into axial movement, the principle is shown in fig. 2, a slide way 51 of the ball 4 in the handle stainless steel main body 5 is a diagonal line groove as shown in fig. 2, and two ends of the slide way are provided with circular bayonets 52 for fixing two final states of loosening and tightening of a chuck. When the ball is located lower bayonet, the chuck is in clamping state, when will changing excellent 9, will loosen electric sander chuck, the ball moves in the slide, its resistance comes from the bounce that dish spring compressed and produced, according to hooke's law spring compression deformation volume is big more, elasticity is big more, and the inclination (the contained angle with the water flat line) of slide is unchangeable this moment, the ball is more up (when anticlockwise rotation in the picture), the resistance is big more, ball, slide wear easily, the fault rate is high, influence electric sander's life.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defect that the resistance of the rotary later stage is large when the grinding rod is replaced by the existing electric grinding machine, and provide a rotary tightening mechanism of the electric grinding machine which is easy to wear and tear easily by the slide and the ball when the grinding rod is replaced.

The utility model discloses the technical scheme who adopts is an electronic polisher's rotatory elasticity mechanism, including preceding shell of handle, handle mesochite, handle ball overcoat, handle stainless steel main part, ball, handle ball endotheca, hollow main shaft, chuck, dish spring knot, bolt, characterized by, the slide of the ball in the handle stainless steel main part is the line segment component of two sections different angles at least, and the horizontal contained angle of upper segment is less than the horizontal contained angle of hypomere.

The utility model discloses a improve on the basis of the rotatory elasticity mechanism of current electronic polisher, the basic structure and the size of remaining all parts, only change the slide of the ball in the handle stainless steel main part, change it into the line segment by different angles and constitute, when will relaxing the chuck, because at the initial stage of slide stroke, what correspond is clearance between handle ball endotheca and dish-shaped spring buckle, the non-resistance, the angle of slide this moment is big, same slash displacement, the ball risees fast, contact when handle ball endotheca and dish-shaped spring buckle, and promote the chuck and go upward, compress the dish-shaped spring simultaneously, this moment, the slide angle is little to become gentle slope, labor-saving, the stress of slide and ball is little simultaneously, difficult wearing and tearing, be favorable to increase of service life.

The horizontal included angle of the multi-segment line gradually increases from top to bottom. After the handle ball inner sleeve is buckled with the disc spring, the resistance borne by the ball and the slideway is gradually increased, and the slideway is gradually slowed down, so that the force applied by an operator is unchanged or slightly increased.

The vertical projection of the line segment at the lowest end is equal to the distance between the lower end surface of the disk-shaped spring buckle and the inner contact surface of the handle ball inner sleeve. Since this section is the freeway area, the steeper the ramp, the faster the speed.

The line segments are smoothly transited. The smooth slide is favorable for smooth rolling of the ball.

The slide is a circular arc in the first quadrant. The circular arc of first quadrant just can satisfy horizontal contained angle and by the crescent from top to bottom, and the circular arc structure is favorable to processing and ball motion.

The included angle between the tangent line of the arc at the upper end point of the slide way and the horizontal line is 3-7 degrees, and the included angle between the tangent line of the arc at the lower end point of the slide way and the horizontal line is 12-18 degrees.

The central angle of the slideway is 8-10 degrees.

The utility model discloses change for a short time prior art, through the inclination to the slide of the ball in the handle stainless steel main part, at the first steep back of pine process design that slows down, reduce the rotation resistance of back end, reach laborsaving purpose, make ball and slide atress little simultaneously, difficult wearing and tearing are favorable to increase of service life.

Drawings

FIG. 1 is a schematic view of a rotation tightening mechanism of an electric sander

FIG. 2 is a developed view of a stainless steel body of a conventional handle

Figure 3 is the development view of the stainless steel main body of the handle of the utility model

Wherein: the handle comprises a handle front shell 1, a handle middle shell 2, a handle ball outer sleeve 3, a handle ball 4, a handle stainless steel main body 5, a slideway 51, a bayonet 52, a handle ball inner sleeve 6, a hollow main shaft 7, a chuck 8, a grinding rod 9, a disc spring 10, a disc spring buckle 11 and a bolt 12.

Detailed Description

The embodiments illustrated herein will enable those skilled in the art to more fully understand the present invention, without limiting it in any way, when the present invention is described in detail below with reference to the accompanying drawings.

As shown in fig. 3, a rotary tightening mechanism of an electric grinding machine is improved on the basis of the rotary tightening mechanism of the existing electric grinding machine, the basic structures and the sizes of all parts are reserved, namely, a handle front shell 1, a handle ball outer sleeve, balls 4, a handle ball inner sleeve 6, a hollow spindle 7, a chuck 8, a disc spring 10, a disc spring buckle 11 and a bolt 12 are not changed, only a handle stainless steel main body 5 is changed, specifically, only a slide way of the balls in the handle stainless steel main body is changed, an original oblique line is changed into at least two line segments with different angles, and the horizontal angle of the upper segment is smaller than that of the lower segment, namely, the upper segment is gradually steep. Better design: the horizontal included angle of the multi-segment line gradually increases from top to bottom. The vertical projection of the line segment at the lowest end is equal to the distance between the lower end surface of the disk-shaped spring buckle and the inner contact surface of the handle ball inner sleeve, and the line segments are in smooth transition.

In order to facilitate the processing and the ball movement, the utility model discloses be convex with the slide design, be in the circular arc of first quadrant very much. The included angle between the tangent line of the arc at the upper end point of the slide way and the horizontal line is 3-7 degrees, and the included angle between the tangent line of the arc at the lower end point of the slide way and the horizontal line is 12-18 degrees. The central angle of the slideway is 8-10 degrees. In the figure, the radius of the arc is 60mm, the central angle is 9 degrees, and the included angle between the tangent line of the arc at the upper end point and the horizontal line is 6 degrees. The rest of the parts which are not described are the same as the prior art.

Above embodiment only is for explaining the utility model discloses a technical thought can not be injectd with this the utility model discloses a protection scope, all according to the utility model provides a technical thought, any improvement of doing on technical scheme basis and equal replacement all fall into within the protection scope of the utility model.

Claims

1. The utility model provides a rotatory elasticity mechanism of electronic polisher, includes handle front shell, handle mesochite, handle ball overcoat, handle stainless steel main part, ball, handle ball endotheca, hollow main shaft, chuck, dish spring are detained, bolt, characterized by, the slide of the ball in the handle stainless steel main part is two sections line segments of different angles at least and constitutes, and the horizontal contained angle of upper segment is less than the horizontal contained angle of hypomere.

2. The rotary tightening mechanism of an electric sander according to claim 1, wherein the horizontal included angle of the segments increases from top to bottom.

3. A rotary tightening mechanism for an electric sander according to any of claims 1 or 2, wherein the vertical projection of the lowermost line segment is equal to the distance between the lower end surface of the disk spring and the inner contact surface of the handle ball housing.

4. The rotary tightening mechanism of an electric sander according to claim 1, wherein the line segments smoothly transition.

5. The rotary tightening mechanism of an electric sander according to claim 1, wherein the slide is in the shape of an arc of a circle in the first quadrant.

6. The rotary tightening mechanism of an electric sander according to claim 5, wherein the included angle between the tangent to the arc at the upper end of the slide and the horizontal line is 3-7 °, and the included angle between the tangent to the arc at the lower end of the slide and the horizontal line is 12-18 °.