A kind of collet expander for being coated with frock
Technical field
The present invention relates to a kind of collet expander for being coated with frock.
Background technology
At present, each chuck is to be pulled up small axle using spring in coating frock, so that polytetrafluoro expansion-head(Four
6 valves are splitted on fluorine expansion-head circumference, and are fasten with O-ring seal)Stress is opened on circular conical surface, is then strangled on six valves
Sealing ring just in aluminum pipe internal expansion so as to serve the effect of promptly aluminum pipe, but such structural disadvantages be tube interior without
Method accomplish it is closed because in coating process, it is necessary to bottom plug by its port sealing, so as to add process, labor intensity is big,
Cost is high, and also needs often to do washing and cleaning operation in pipe.
The content of the invention
(One)Technical problems to be solved
To solve the above problems, the present invention propose it is a kind of it is simple in construction, process is few, labor intensity is low and economic and environment-friendly
It is coated with the collet expander of frock.
(Two)Technical scheme
The collet expander of the coating frock of the present invention, including aluminum pipe, small axle mounting seat, scalable small axle and expansion loop;
The small axle mounting seat is arranged on the inside of aluminum pipe;The scalable small the tip of the axis is located in small axle mounting seat
Its front end;The expansion loop rear and front end is respectively arranged with small jaws and big jaws;Set between the small jaws and big jaws
There is expansion chamber;The expansion loop is clamped in scalable small axle and small axle mounting seat by the small jaws and big jaws of its rear and front end
On.
Further, the inside of the small axle mounting seat is additionally provided with spring, and simultaneously with scalable small the tip of the axis phase
Connection.
Further, the small jaws and big jaws and scalable small axle and small axle mounting seat are that sealing folds.
(Three)Beneficial effect
Compared with prior art, it has the advantages that the present invention:The expansion folder of the coating frock of the present invention
Head overall construction design advantages of simple, can making aluminum pipe, inner space is in air-tight state, so as to save during promptly
Break off the base plug, eliminates bottom plug and the process for removing bottom plug, reduces labor intensity;More reduce aluminum pipe simultaneously in cleaning cleaning time
Number, improves environmental-protecting performance, and reduce production cost.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
1- aluminum pipes;The small axle mounting seats of 2-;The scalable small axles of 3-;4- expansion loops;The small jaws of 41-;The big jaws of 42-;43- expands
Chamber;5- springs.
Embodiment
A kind of collet expander of coating frock as shown in Figure 1, including aluminum pipe 1, small axle mounting seat 2, scalable small axle 3
With expansion loop 4;The small axle mounting seat 2 is arranged on the inside of aluminum pipe 1;Pacify embedded in small axle the end of the scalable small axle 3
Fill in seat 2, and be located at its front end;The rear and front end of expansion loop 4 is respectively arranged with small jaws 41 and big jaws 42;The small folder
Expansion chamber 43 is provided between mouth 41 and big jaws 42;Small jaws 41 and big jaws of the expansion loop 4 by its rear and front end
42 are clamped on scalable small axle 3 and small axle mounting seat 2.
Wherein, the inside of the small axle mounting seat 2 is additionally provided with spring 5, and the end phase with scalable small axle 3 simultaneously
Connection;The small jaws 41 and big jaws 42 are that sealing folds with scalable small axle 3 and small axle mounting seat 2.
The collet expander overall construction design advantages of simple of the coating frock of the present invention, aluminum pipe can be made in mistake promptly
Cheng Zhong, inner space is in air-tight state, so as to save bottom plug, eliminates bottom plug and the process for removing bottom plug, reduces labor
Fatigue resistance;More reduce aluminum pipe simultaneously and cleaning wash number, improve environmental-protecting performance, and reduce production cost.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to the structure of the present invention
Think and scope is defined.On the premise of design concept of the present invention is not departed from, technology of the ordinary people in the field to the present invention
The all variations and modifications that scheme is made, all should drop into protection scope of the present invention, the claimed technology contents of the present invention,
All record in detail in the claims.