Tube expander
A tube expander including: a main body, two opposite clamping blocks being disposed under a bottom of the main body, the two clamping blocks defining therebetween an insertion space in which a copper tube can be clamped; and a bolt screwed through the main body. One end of the bolt, which extends out of the main body, has a rotary switch. A top face of the rotary switch is formed with a polygonal socket in which a connecting member is accommodated. The connecting member is easily connectable with a mechanical power source for conveniently and quickly ascend/descending the bolt within the insertion space of the main body.
The present invention is related to a tube expander which is conveniently connectable with a power source.
Referring to
When applied to different working sites, the copper tube 40 must be cut into different lengths as necessary. Then one end of the copper tube 40 is expanded by a tube expander into the enlarged section 41.
In use of the conventional tube expander, a copper tube 40 is clamped by an elongated cramp 42. The cramp 42 is horizontally inserted in the insertion space 82 of the main body 80. The locating bolt 86 is tightened to tightly abut against the cramp 42 with one end of the copper tube 40 in alignment with the bolt 83. By means of manually wrenching the bolt 83, the conic body 84 is spirally descended toward the copper tube 40 for pressing and expanding the end of the copper tube 40 into the enlarged section 41.
The bolt of the conventional tube expander can be only manually operated. When the conic body presses and deforms the end of the copper tube, a user needs to exert a stress onto the copper tube to overcome the strength thereof. Therefore, it is quite laborious and inconveniently to perform the tube expansion operation.
SUMMARY OF THE INVENTIONIt is therefore a primary object of the present invention to provide a tube expander which is conveniently connectable with a mechanical power source. The tube expander can be driven by the power source to conveniently and quickly descend the bolt for expanding the tube. Therefore, the tube expansion operation can be performed with labor saved.
According to the above object, the tube expander of the present invention includes a main body. Two opposite clamping blocks are disposed under the bottom of the main body. The two clamping blocks 11 define therebetween an insertion space. The present invention further includes a bolt screwed through the center of the main body. One end of the bolt, which extends into the insertion space, has a conic body. The other end of the butterfly bolt, which extends out of the main body, has a rotary switch. One face of the rotary switch distal from the conic body is formed with a polygonal socket coaxial with the bolt.
The present invention further includes a connecting member having a polygonal block for inserting in the polygonal socket of the bolt and a coupling section for coupling with a power source. Through the connecting member, the power source can drive the bolt to rotate for expanding the copper tube.
The present invention can be best understood through the following description and accompanying drawings wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
Please refer to
The present invention further includes a butterfly bolt 20 screwed through the center of the main body 10. One end of the butterfly bolt 20, which extends into the insertion space 12, has a conic body 21. The other end of the butterfly bolt 20, which extends out of the main body 10, has a rotary switch 22. One face of the rotary switch 22 distal from the conic body 21 is formed with a connecting section which can be a polygonal socket 23. The polygonal socket 23 is coaxial with the butterfly bolt 20. In this embodiment, the polygonal hole 23 is a square socket.
The present invention further includes a connecting member 30 having a polygonal block 31. In this embodiment, the polygonal block 31 is a quadrangular column. The connecting member 30 further has a coupling section 32 for coupling with a power source. The polygonal block 31 of the connecting member 30 can be inserted in the polygonal socket 23 of the butterfly bolt 20.
In use of the present invention, as shown in
Referring to
According to the above arrangement, the present invention has the following advantages:
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- 1. The butterfly bolt of the tube expander of the present invention is formed with a polygonal socket for directly coupling with a power source. By means of the polygonal socket, the present invention can be mechanically driven to conveniently and quickly perform tube expansion operation. The polygonal block of the connecting member has a unified specification for inserting in the polygonal socket of the butterfly bolt. The coupling section of the connecting member can have different configurations adapted to different types of coupling seats of different power sources. Accordingly, the present invention can be conveniently connected with different mechanical power sources for expanding the tube.
- 2. By means of the butterfly bolt and the connecting member, the tube expander of the present invention can be connected with a nonhuman power source. The tube expander of the present invention can be driven by the power source to conveniently and quickly ascend/descend the butterfly bolt for expanding the tube. Accordingly, the efficiency of the tube expansion operation can be greatly enhanced. Also, in operation, the labor is saved.
The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the spirit of the present invention.
Claims
1. A tube expander comprising:
- a main body, two opposite clamping blocks being disposed under a bottom of the main body, the two clamping blocks defining therebetween an insertion space; and
- a bolt screwed through the main body, one end of the bolt, which extends into the insertion space, having a conic body, the other end of the bolt, which extends out of the main body, having a rotary switch, one face of the rotary switch distal from the conic body being formed with a connecting section for connecting with a power source.
2. The tube expander as claimed in claim 1, wherein the connecting section of the bolt is connectable with a connecting member connectable with the power source.
3. The tube expander as claimed in claim 2, wherein the connecting section of the bolt is a polygonal socket and the connecting member has a polygonal block corresponding to the polygonal socket of the bolt and a coupling section for coupling with the power source, whereby the polygonal block of the connecting member can be inserted in the polygonal socket of the bolt.
4. The tube expander as claimed in claim 3, wherein the polygonal socket of the bolt is a square socket and the polygonal block of the connecting member is a quadrangular column corresponding to the square socket.
5. The tube expander as claimed in claim 1, wherein a locating bolt is perpendicularly screwed through one of the clamping blocks of the main body.
Type: Application
Filed: Dec 7, 2004
Publication Date: Jun 8, 2006
Inventor: Meng Kao (Taichung City)
Application Number: 11/004,981
International Classification: B21D 41/02 (20060101);