CN214304821U

CN214304821U - Transmission shaft based on thread coupling

Info

Publication number: CN214304821U
Application number: CN202022184910.3U
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: 2021-09-28
Anticipated expiration: 2030-09-29

Abstract

The utility model provides a transmission shaft based on threaded coupling, including the axostylus axostyle, the axostylus axostyle includes first portion, second portion and third portion, be provided with the shaft shoulder between first portion and the second portion, the third portion is less than first portion and second portion by the tip axial extension formation of second portion and the diameter of third portion, laid the screw thread on the second portion, the screw thread with all have the interval between the terminal surface of shaft shoulder and second portion. This embodiment is used for solving the transmission shaft and is used in the electric drill, and the electric drill is at the drilling in-process, the problem that the transmission shaft skidded easily.

Description

Transmission shaft based on thread coupling

Technical Field

The utility model relates to a transmission shaft especially relates to a transmission shaft based on thread coupling.

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 a transmission shaft based on screw thread coupling, this transmission shaft passes through the motor of threaded connection and electric drill fixed, and it is good to connect the steadiness, is difficult to skid in the use.

The utility model provides a transmission shaft based on thread coupling, including the axostylus axostyle, the axostylus axostyle includes first portion, second portion and third portion, be provided with the shaft shoulder between first portion and the second portion, the third portion is less than first portion and second portion by the tip axial extension formation of second portion and the diameter of third portion, laid the screw thread on the second portion, the screw thread with all have the interval between the terminal surface of shaft shoulder and second portion.

Preferably, a first threaded hole is formed in the end face of the first portion along the axial direction of the first portion, and the first threaded hole is coaxial with the transmission shaft.

Preferably, a second threaded hole is formed in the end face of the third portion along the axial direction of the third portion, the second threaded hole and the first threaded hole are coaxially arranged, and the diameter of the second threaded hole is larger than that of the first threaded hole.

Preferably, the thread is spaced from the shoulder by a greater distance than the thread is spaced from the end face of the second portion.

Preferably, an arc transition surface is formed between an end surface of the shoulder facing the thread and the outer peripheral surface of the second portion.

Preferably, the arc transition surface is a concave surface.

Preferably, the outer peripheral surface portion of the first portion is provided as a polygonal surface arranged on a side close to the end of the first portion.

Preferably, the end of the first part is provided with a convex ring, the convex ring is coaxially arranged with the transmission shaft, and an annular groove is formed between the convex ring and the part with the polygonal prism surface.

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

the utility model provides a transmission shaft based on threaded coupling, including the axostylus axostyle, the axostylus axostyle includes first portion, second portion and third portion, be provided with the shaft shoulder between first portion and the second portion, the third portion is less than first portion and second portion by the tip axial extension formation of second portion and the diameter of third portion, laid the screw thread on the second portion, the screw thread with all have the interval between the terminal surface of shaft shoulder and second portion. When the transmission shaft of this embodiment was used on the electric drill, the transmission shaft passed through the screw thread on the second portion and was connected with the motor in the electric drill, all had the interval between the terminal surface of screw thread and shaft shoulder and second portion, carries out the spiro union, and the screw thread part is located the transmission shaft and the motor middle zone of pegging graft coincidence portion, so, threaded connection's effect is better, and the motor is in the use, and the transmission shaft is difficult to take place to skid.

Drawings

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

Fig. 2 is a sectional view of the entire structure of a transmission shaft according to an embodiment of the present invention.

In the figure, 10, the third part; 11. a second portion; 12. a thread; 13. a shaft shoulder; 15. a first portion; 16. polygonal surfaces; 17. an annular groove; 18. a convex ring; 19. a second threaded hole; 20. an arc transition surface; 21. a first threaded hole.

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 and 2, in this embodiment, a power shaft is used in a power drill, and in particular, for transmitting power generated by a motor within the power drill to a drill bit so that the drill bit can perform a drilling operation on a sheet 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 this embodiment, the power shaft includes a shaft rod, the shaft rod includes a first portion 15, a second portion 11 and a third portion 10, a shoulder 13 is disposed between the first portion 15 and the second portion 11, the third portion 10 is formed by axially extending an end of the second portion 11, a diameter of the third portion 10 is smaller than that of the first portion 15 and the second portion 11, a thread 12 is disposed on the second portion 11, and a space is provided between the thread 12 and end faces of the shoulder 13 and the second portion 11. When the transmission shaft of this embodiment was used on the electric drill, the transmission shaft was connected with the motor in the electric drill through screw thread 12 on the second part 11, all had the interval between the terminal surface of screw thread 12 and shoulder 13 and second part 11, carries out the spiro union, and screw thread 12 part is located transmission shaft and motor grafting coincidence part's middle zone, so, the effect of screw thread 12 connection is better, and the motor is in the use, and the transmission shaft is difficult to take place to skid.

Further, a first threaded hole 21 is formed in the end face of the first portion 15 along the axial direction of the first portion, and the first threaded hole 21 is coaxial with the transmission shaft. When the drive shaft is applied to the drill, the drill bit of the drill is inserted into the first threaded hole 21 of the first portion 15 of the drive shaft by means of the thread 12.

Further, a second threaded hole 19 is formed in the end face of the third portion 10 along the axial direction of the third portion, the second threaded hole 19 and the first threaded hole 21 are coaxially arranged, and the aperture of the second threaded hole 19 is larger than that of the first threaded hole 21. So set up, when the transmission shaft was assembled with the electric drill, not only fixed through screw thread 12 on the second part 11, it is fixed still to carry out the spiro union cooperation through 10 internal threads 12 holes of third part and electric drill, and the structure steadiness is better, and the transmission shaft is difficult to skid more.

Further, the distance between the thread 12 and the shoulder 13 is greater than the distance between the thread 12 and the end surface of the second part 11.

Further, an arc transition surface 20 is formed between an end surface of the shoulder 13 facing the thread 12 and the outer circumferential surface of the second portion 11. So set up, when transmission shaft and electric drill carry out the spiro union cooperation, the power take off butt contact of shaft shoulder 13 and electric drill, because shaft shoulder 13 has the excessive face 20 of arc towards the terminal surface of electric drill direction, so shaft shoulder 13 closely laminates with the power take off of electric drill more easily, and its compressive resistance effect is also better simultaneously.

Preferably, the curved transition surface 20 is a concave surface.

Further, an outer peripheral surface portion of the first portion 15 is provided as a polygonal surface 16, and the polygonal surface 16 is disposed on a side close to an end portion of the first portion 15. The polygonal surface 16 is provided on the outer peripheral surface of the first portion 15, which facilitates the mounting of the transmission shaft by a user using a tool such as a wrench.

Preferably, the end of the first portion 15 is provided with a protruding ring 18, the protruding ring 18 is arranged coaxially with the drive shaft, and an annular groove 17 is formed between the protruding ring 18 and the portion where the polygonal surface 16 is located.

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. A transmission shaft based on threaded coupling comprises a shaft rod and is characterized in that the shaft rod comprises a first portion, a second portion and a third portion, a shaft shoulder is arranged between the first portion and the second portion, the third portion is formed by axially extending the end portion of the second portion, the diameter of the third portion is smaller than that of the first portion and that of the second portion, threads are distributed on the second portion, and a gap is reserved between each thread and the end faces of the shaft shoulder and the second portion.

2. The drive shaft of claim 1, wherein the first portion has a first threaded bore formed in an end surface thereof in an axial direction thereof, the first threaded bore being disposed coaxially with the drive shaft.

3. The transmission shaft according to claim 2, wherein a second threaded hole is formed in an end surface of the third portion along an axial direction thereof, the second threaded hole is coaxially arranged with the first threaded hole, and a diameter of the second threaded hole is larger than a diameter of the first threaded hole.

4. A propeller shaft according to claim 1, wherein the thread is spaced from the shoulder by a greater distance than the thread is spaced from the end surface of the second portion.

5. A propeller shaft according to claim 1, wherein the shoulder has an arcuate transition surface between the end surface of the shoulder facing the thread and the outer circumferential surface of the second portion.

6. The propeller shaft of claim 5 wherein the arcuate transition surface is a concave inner surface.

7. The propeller shaft of claim 1 wherein the outer peripheral surface portion of the first portion is provided as a polygonal surface, the polygonal surface being disposed adjacent to one side of the end of the first portion.

8. A drive shaft according to claim 7 wherein the first portion is provided at its end with a male ring, the male ring being provided coaxially with the drive shaft, the male ring and the part of the polygonal face forming an annular groove therebetween.