TWI819704B - Tube expander - Google Patents

Abstract

A tube expander includes a main body, a driving assembly and a plurality of elastic members. The main body has a first threaded portion. The driving assembly has a second threaded portion. Those elastic members are arranged around the driving assembly. When the first threaded portion is disengaged from the second threaded portion, the first threaded portion has the tendency to move toward the second threaded portion.

Description

Pipe expander

The invention relates to a pipe expander.

According to the general structure of the pipe expander, it is as disclosed in the patent TWM256241. It includes at least a body and two clamping blocks. A slot is formed between the two clamping blocks and can be correspondingly located at the bottom of the body. The body is passed through There is a bolt, which can be rotated and lifted. By using a rotating tool (such as an electric tool or a pneumatic tool) to rotate forward, the pipe fitting sandwiched between the two clamping blocks can be pressed against the top to perform the pipe expansion operation. However, when the pipe expansion operation is completed and the bolt is to be disassembled, the bolt needs to be reversed first. If a rotating tool is used for reversal, if the bolt is reversed to the end point, the bolt will no longer be able to be reversed and the rotating tool will continue to rotate, resulting in The user's hand is sprained by the rotating tool, which has shortcomings that need to be improved urgently.

Therefore, it is necessary to provide a novel and progressive pipe expander to solve the above problems.

The main purpose of the present invention is to provide a pipe expander with a one-way idling function, which can prevent the user from being sprained when using a rotating tool, and is easy to reset, thereby increasing work efficiency.

In order to achieve the above object, the present invention provides a pipe expander, which includes a body, a driving component and a plurality of elastic members. The body is provided with a first threaded portion along an axial direction. The driving component is provided with a second threaded part, and the first threaded part is screwed with the second threaded part. The elastic members are arranged around the driving component and are provided on one of the driving component and the body. When the first threaded part and the second threaded part are screwed, the first threaded part and the second threaded part are screwed together. When the threaded parts are disengaged, the elastic members directly or indirectly abut between the driving component and the body, so that the first threaded part and the second threaded part have a tendency to approach each other.

1: Ontology

11: First thread part

12: Clamp part

13:Socket part

14:Volume

15:Thread sleeve

2:Drive components

20:Volume

21:Second thread part

22:Drive Department

23: mandrel

24:Work Department

25: Collar

26:Gasket

27: No threaded section

3: Elastic parts

4: Top support piece

91: Pipe clamp assembly

92:Pipe fittings

Figure 1 is a perspective view of a preferred embodiment of the present invention.

Figure 2 is an exploded view of a preferred embodiment of the present invention.

3 to 4 are operational cross-sectional views of a preferred embodiment of the present invention.

Figure 5 is a partial enlarged view of Figure 4.

The following examples are only used to illustrate the possible implementation modes of the present invention, but are not intended to limit the scope of protection of the present invention.

Please refer to Figures 1 to 5, which show a preferred embodiment of the present invention. The pipe expander of the present invention includes a body 1, a driving component 2 and a plurality of elastic members 3.

The body 1 is provided with a first threaded portion 11 along an axial direction.

The driving component 2 is provided with a second threaded part 21. The first threaded part 11 is screwed with the second threaded part 21. In this embodiment, the first threaded part 11 is an internal thread. The second threaded part 21 They are external threads and can be replaced with each other in other embodiments.

The elastic members 3 are arranged around the driving component 2 and are provided on one of the driving component 2 and the body 1. When the first threaded part 11 and the second threaded part 21 are screwed together, the first threaded part 11 and the second threaded part 21 are screwed together. When the threaded portion 11 is disengaged from the second threaded portion 21, the elastic members 3 directly or indirectly abut between the driving component 2 and the body 1, so that the first threaded portion 11 and the second threaded portion Part 21 has a tendency to be close to each other. In this embodiment, the elastic members 3 are provided on the driving component 2, and in other embodiments they may also be provided on the body; the driving component 2 also includes a plurality of equally spaced rings of holes 20, and the plurality of elastic members 3 are respectively accommodated in the plurality of holes 20 .

Thereby, when the driving assembly 2 rotates forward relative to the body 1, the pipe expansion operation can be performed. After the pipe expansion operation is completed, the driving assembly 2 can be driven reversely relative to the body 1. When the second threaded portion 21 faces the body 1, the pipe expansion operation can be performed. When the first threaded part 11 is reversed to the end and cannot continue to be reversed, the second threaded part 21 is separated from the first threaded part 11 and rotates idling, which can prevent the user's hand from being sprained by the rotating tool, and because The elastic members 3 directly or indirectly abut between the driving component 2 and the body 1, so that the first threaded portion 11 and the second threaded portion 21 have a tendency to be close to each other. When the user moves the When the first threaded part 11 rotates forward relative to the second threaded part 21, the first threaded part 11 and the second threaded part 21 can be threaded again immediately, which is more convenient in use and can achieve a quick switching function.

Specifically, one end of the body 1 includes a clamp portion 12 for inserting a pipe clamp assembly 91 , and the other end is provided with the first threaded portion 11 . The pipe clamp assembly 91 is for clamping a pipe fitting 92 . The clamp portion 12 is further provided with a push-button piece 4. The push-button piece 4 is movably screwed to the clip portion 12 along the transverse and axial direction, so that the push piece 4 can move toward the inside of the clip portion 12. Move and fix the pipe clamp assembly 91 .

Furthermore, the driving component 2 includes a driving part 22, a spindle 23 and a working part 24 connected in sequence. The driving part 22 is provided with the second threaded part 21, the spindle 23 and the working part 24. Located in the main body 1 , the working part 24 is used to press against the pipe fitting 92 for pipe expansion operation, and the driving part 22 is used to be combined with a rotating tool.

Preferably, the elastic members 3 are arranged around one of the mandrel 23 and the working part 24. In this embodiment, the elastic members 3 are arranged around the mandrel 23, and the elastic members 3 are The radial size is smaller than the radial size of the spindle 23, so that when the elastic members 3 directly or indirectly abut between the driving component 2 and the body 1, the driving component 2 and the body 1 can be evenly matched. It is not easy to be distorted under force, so when the first threaded part 11 and the second threaded part 21 rotate forward, the first threaded part 11 and the second threaded part 21 can be screwed more smoothly.

Among them, the elastic members 3 are ringed at one end of the working part 24 facing the driving part 22. The body 1 is also provided with a socket part 13. The socket part 13 is provided with the first threaded part 11. When the third When the threaded portion 11 is separated from the second threaded portion 21 , the elastic members 3 directly or indirectly abut the end surface of the socket portion 13 along the axial direction. It is worth mentioning that the socket part 13 is fixed with a threaded sleeve 15, and the threaded sleeve 15 is provided with the first threaded part 11. When the first threaded part 11 is separated from the second threaded part 21, the When the elastic member 3 abuts against the threaded sleeve 15, the threaded sleeve 15 can be disassembled for easier maintenance.

Preferably, the driving assembly 2 further includes a set of rings 25, which is sleeved on one end of the working part 24 facing the driving part 22, and the circumferential surface of the ring 25 facing the driving part 22 accommodates the By first accommodating the elastic members 3 in the collar 25 and then setting the collar 25 in the working part 24 , the overall structure can be easier to assemble and maintain.

It is also preferred that a gasket 26 is provided between the elastic members 3 and the socket portion 13. The gasket 26 is sleeved on the working portion 24. When the first threaded portion 11 and the second threaded portion When the 21 phases are separated, the The elastic members 3 push the gasket 26 toward the socket portion 13 to prevent the socket portion 13 from being worn by the elastic members 3 .

Specifically, the body 1 is provided with a hole 14, and the working part 24 is located in the hole 14; the driving part 22 is provided with an unthreaded section 27 toward one end of the working part 24. When the first threaded part 11 When disengaging from the second threaded portion 21 , the threadless section 27 is still located within the first threaded portion 11 to prevent the driving portion 22 from completely disengaging from the first threaded portion 11 .

1: Ontology

12: Clamp part

13:Socket part

2:Drive components

21:Second thread part

22:Drive Department

24:Work Department

4: Top support piece

Claims (10)

A pipe expander, including: a body provided with a first threaded part along an axial direction; a driving component provided with a second threaded part, the first threaded part and the second threaded part being screwed together; a plurality of elastic members , the elastic members are arranged around the driving component and are provided on one of the driving component and the body. When the first threaded part and the second threaded part are screwed, the first threaded part and the third threaded part are screwed together. When the two threaded parts are separated, the elastic members directly or indirectly abut between the driving component and the body, so that the first threaded part and the second threaded part have a tendency to approach; wherein, the driving component The component also includes a plurality of holes arranged in an equally spaced ring, and the plurality of elastic members are respectively accommodated in the plurality of holes. The pipe expander according to claim 1, wherein one end of the body includes a clamp portion for inserting a pipe clamp assembly, and the other end is provided with the first threaded portion. The pipe clamp assembly is for clamping a pipe fitting. The pipe expander as claimed in claim 2, wherein the clamping part is further provided with an abutting member, and the abutting member is movably screwed to the clamping part along the direction transverse to the axial direction. The pipe expander of claim 1, wherein the driving component includes a driving part, a mandrel and a working part connected in sequence, the driving part is provided with the second threaded part, the mandrel and the working part located within the body. The pipe expander according to claim 4, wherein the elastic members are arranged around one of the mandrel and the working part. The pipe expander according to claim 4, wherein the elastic members are ringed at one end of the working part facing the driving part, and the body is further provided with a socket part, and the socket part is provided with the first threaded part, should When the first threaded part is separated from the second threaded part, the elastic members directly or indirectly abut the end surface of the socket part along the axial direction. The pipe expander according to claim 6, wherein the driving component further includes a collar, the collar is sleeved on one end of the working part facing the driving part, and the circumferential surface of the collar facing the driving part contains a These elastic parts. The pipe expander according to claim 6, wherein a gasket is provided between the elastic members and the socket part, and the gasket is sleeved on the working part. When the first thread part and the second thread When the two parts are separated from each other, the elastic members push the gasket toward the socket part. The pipe expander of claim 4, wherein the radial size of each elastic member is smaller than the radial size of the mandrel. The pipe expander according to claim 3, wherein the driving component includes a driving part, a mandrel and a working part connected in sequence, the driving part is provided with the second threaded part, the mandrel and the working part Located inside the body; the elastic members are arranged around one of the spindle and the working part; the elastic members are ringed at one end of the working part facing the driving part, and the body is also provided with a socket part, the The socket part is provided with the first threaded part, and when the first threaded part is separated from the second threaded part, the elastic members directly or indirectly abut the end surface of the socket part along the axial direction; The driving component also includes a collar, which is sleeved on one end of the working part facing the driving part. The circumferential surface of the collar facing the driving part houses the elastic members; the elastic members are connected with the sleeve. There is a gasket between the two parts, and the gasket is sleeved on the working part. When the first threaded part and the second threaded part are separated, the elastic members push the gasket toward the socket part. ; The radial size of each elastic member is smaller than the radial size of the mandrel; the body is provided with a hole, and the working part is located in the hole; the socket part is fixed with a threaded sleeve, and the threaded sleeve is provided with The first threaded part, when the first threaded part and the second threaded part are disengaged, the elastic members push the gasket toward the threaded sleeve. Top; The driving part is provided with a threadless section toward one end of the working part. When the first threaded part is separated from the second threaded part, the threadless section is still located in the first threaded part.

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