CN213693359U

CN213693359U - Prevent effectual power shaft that skids

Info

Publication number: CN213693359U
Application number: CN202022188806.1U
Authority: CN
Inventors: 胡如勇; 章立军
Original assignee: Cixi Yongli Electric Tools Co ltd
Current assignee: Cixi Yongli Electric Tools Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-07-13
Anticipated expiration: 2030-09-29

Abstract

The utility model provides an prevent effectual power shaft that skids, including the axostylus axostyle, the axostylus axostyle is including consecutive first portion, second part and third part, and wherein, the diameter of first portion, second portion and third part reduces in proper order, be provided with the shaft shoulder between first portion and the second part, be provided with first ring channel on the first portion, be provided with the second ring channel on the third part, the groove depth of first ring channel is less than the groove depth of second ring channel. The utility model discloses be used for solving the power shaft in the electric drill and receive reaction force great, the problem of skidding easily in the work.

Description

Prevent effectual power shaft that skids

Technical Field

The utility model relates to a transmission shaft especially relates to an prevent effectual power shaft that skids.

Background

When the electric drill works, the motor transmits power to the drill bit through the power shaft, and the drill bit rotates to drill on the plate to perform punching operation. The drill bit passes through the progressive drilling of auger mode and goes into panel, and this in-process, drill bit self can receive very big reaction force, and this reaction force can transmit on the power shaft, causes very big influence for the motion of power shaft, needs the better power shaft of design structure to in the electric drill working process, can not skid, job stabilization nature is better.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided an prevent effectual power shaft that skids.

The utility model provides an prevent effectual power shaft that skids, including the axostylus axostyle, the axostylus axostyle is including consecutive first portion, second part and third part, and wherein, the diameter of first portion, second portion and third part reduces in proper order, be provided with the shaft shoulder between first portion and the second part, be provided with first ring channel on the first portion, be provided with the second ring channel on the third part, the groove depth of first ring channel is less than the groove depth of second ring channel.

Preferably, the width of the first annular groove is greater than the width of the second annular groove.

Preferably, the shaft shoulder is provided with two notches, the end faces of the notches are planes, and the two notches are symmetrically arranged.

Preferably, both sides of the shaft shoulder are provided with tool withdrawal grooves.

Preferably, a step transition is arranged between the second part and the third part, and a chamfer is arranged between the step surface and the second part.

Preferably, the outer peripheral surface of the second portion includes a first outer peripheral surface and a second outer peripheral surface, wherein the first outer peripheral surface has a diameter smaller than that of the second outer peripheral surface, and the first outer peripheral surface is located on a side close to the shoulder.

Preferably, the first outer circumferential surface and the second outer circumferential surface are in contact with each other through a step surface.

Compared with the prior art, the utility model has the advantages of it is following:

the utility model provides a power shaft, including the axostylus axostyle, the axostylus axostyle is including consecutive first portion, second part and third part, and wherein, the diameter of first portion, second portion and third part reduces in proper order, be provided with the shaft shoulder between first portion and the second part, be provided with first ring channel on the first portion, be provided with the second ring channel on the third part, the groove depth of first ring channel is less than the groove depth of second ring channel. Use when using as the transmission shaft in the electric drill, the first part of power shaft links to each other with the motor of electric drill, the third part of power shaft is connected with the drill bit, the diameter of power shaft reduces from the first part to the third part direction gradually, it is big to make the area of contact of power shaft and motor like this, little with the area of contact of drill bit, reaction force is when transmitting between power shaft and the motor through the power shaft, reaction force's decay dynamics greatly increased, thereby skid between power shaft and the motor has effectively been prevented.

Drawings

Fig. 1 is a schematic view of the overall structure of a power shaft according to an embodiment of the present invention.

In the figure, 10, the third part; 20. a second annular groove; 30. chamfering; 40. a second portion; 50. a second outer peripheral surface; 60. a shaft shoulder; 70. a notch; 80. a tool withdrawal groove; 90. a first annular groove; 100. a first portion.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

The solution of the present invention is specifically illustrated by way of example below.

Example one

Referring to fig. 1, in the present embodiment, a power shaft is used in an electric drill, and particularly, for transmitting power generated by a motor in the electric drill to a drill bit so that the drill bit can perform a drilling operation on a plate material. When the drill bit is used for drilling, the drill bit applies a large force to the plate, the plate applies a large reaction force to the drill bit, the reaction force can be transmitted to the motor through the power shaft, and the power shaft is easy to slip under the clamping of the power of the motor and the reaction force, so that the electric drill is unstable in work.

Specifically, in the present embodiment, the power shaft includes a shaft rod, and the shaft rod includes a first portion 100, a second portion 40, and a third portion 10, wherein diameters of the first portion 100, the second portion 40, and the third portion 10 decrease in sequence, a shoulder 60 is disposed between the first portion 100 and the second portion 40, a first annular groove 90 is disposed on the first portion 100, a second annular groove 20 is disposed on the third portion 10, and a groove depth of the first annular groove 90 is smaller than a groove depth of the second annular groove 20. When using in the electric drill, the motor of electric drill is connected to first portion 100, the drill bit of electric drill is connected to third portion 10, because the diameter of first portion 100 is greater than the diameter of third portion 10, make the butt joint area of contact of motor power output shaft and power shaft be greater than the butt joint area of contact of power shaft and drill bit like this, so design, make reaction force when transmitting between motor and the power shaft through the power shaft, the decay of having carried out by a relatively large margin, colleague, the area of contact of power shaft and motor power output shaft is big, also improved the stability of being connected between power shaft and the motor power output shaft, be difficult to skid between power shaft and the motor power output shaft.

Further, a shoulder 60 is provided between the first portion 100 and the second portion 40 of the shaft, the shoulder 60 is used for axially positioning the power shaft, and the shoulder 60 is provided between the first portion 100 and the second portion 40 of the shaft, so that the friction loss of the power shaft can be effectively reduced.

Further, a first annular groove 90 is provided on the first portion 100 and a second annular groove 20 is provided on the second portion 40, wherein the first annular groove 90 has a smaller depth than the annular groove on the second portion 40. First ring channel 90 and second ring channel 20 all are used for fixing a position the power shaft, and when using in the electric drill, first ring channel 90 is close to the motor, and second ring channel 20 keeps away from the motor for first ring channel 90, and the relative power shaft of the part that the motor was kept away from to the power shaft is close to the partial shake of motor more violent, and the relative first ring channel 90's of the degree of depth of second ring channel 20 degree of depth is darker, can effectively improve the positioning action of ring channel to the power shaft.

Further, the groove width of the first annular groove 90 is larger than that of the second annular groove 20, so that the assembling allowance adjusting space is arranged in the first annular groove 90, and the power shaft can be assembled more easily during assembling.

Further, in this embodiment, the shaft shoulder 60 is provided with two notches 70, end surfaces of the notches 70 are planar, and the two notches 70 are symmetrically arranged. The power shaft is conveniently mounted by providing a notch 70 in the shoulder 60.

Preferably, both sides of the shaft shoulder 60 are provided with relief grooves 80. The tool setting grooves on both sides of the shaft shoulder 60 are used for tool withdrawal during power shaft machining.

Further, a step transition is arranged between the second part 40 and the third part 10, and a chamfer 30 is arranged between the step surface and the second part 40.

Further, the outer peripheral surface of the second portion 40 includes a first outer peripheral surface and a second outer peripheral surface 50, wherein the diameter of the first outer peripheral surface is smaller than that of the second outer peripheral surface 50, and the first outer peripheral surface is located at a side close to the shoulder 60.

Further, the first outer peripheral surface and the second outer peripheral surface 50 are connected by a step surface.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides an effectual power shaft prevents skidding which characterized in that, includes the axostylus axostyle, the axostylus axostyle is including consecutive first portion, second portion and third portion, wherein, the diameter of first portion, second portion and third portion reduces in proper order, be provided with the shaft shoulder between first portion and the second portion, be provided with first ring channel on the first portion, be provided with the second ring channel on the third portion, the groove depth of first ring channel is less than the groove depth of second ring channel.

2. The power shaft of claim 1, wherein the width of the first annular groove is greater than the width of the second annular groove.

3. The power shaft as claimed in claim 1, wherein the shoulder is provided with two notches, the end faces of the notches are planar, and the two notches are symmetrically arranged.

4. A power shaft according to claim 1 or 3, characterised in that the shaft shoulder is provided with relief grooves on both sides.

5. The power shaft of claim 1, wherein a stepped transition is provided between the second portion and the third portion, and a chamfer is provided between the stepped surface and the second portion.

6. The power shaft of claim 5, wherein the outer peripheral surface of the second portion includes a first outer peripheral surface and a second outer peripheral surface, wherein the first outer peripheral surface has a diameter smaller than a diameter of the second outer peripheral surface, and wherein the first outer peripheral surface is located on a side adjacent to the shoulder.

7. The power shaft of claim 6, wherein the first outer peripheral surface and the second outer peripheral surface are joined by a stepped surface.