CN203140618U

CN203140618U - U-shaped end clamping device of pipe expander

Info

Publication number: CN203140618U
Application number: CN 201320067758
Authority: CN
Inventors: 柯忠芳
Original assignee: Ningbo Jingda Forming Equipment Co Ltd
Current assignee: Ningbo Jingda Forming Equipment Co Ltd
Priority date: 2013-02-06
Filing date: 2013-02-06
Publication date: 2013-08-21
Anticipated expiration: 2023-02-06

Abstract

A U-shaped end clamping device of a pipe expander comprises a body and an arched clip, the head portion of the body is provided with a U-shaped groove which is matched with a U-shaped pipe fitting, symmetrical straight grooves are formed in two sides of the body, a fixed pin roll is installed on the upper portion of the body, the arched clip is hinged with the fixed pin roll, the head portion of the arched clip is provided with a groove which is matched with the U-shaped end of the pipe fitting, the lower portion of the arched clip is provided with a guide groove, a moving pin roll penetrates through the straight grooves in two sides of the body and the guide groove in the arched clip and is hinged with a push rod, a spring is sleeved on the push rod, the upper end of the spring is limited by the bottom of the body, the lower end of the spring is limited by a protrusion on the push rod, a bottom end which is used for fixing the body is arranged at the bottom of the body, and the push rod is connected with a pushing part. The U-shaped end clamping device is provided with only one arched clip, so that when the U-shaped end clamping devices are used for machining U-shaped workpieces in short row distances, the U-shaped end clamping devices among rows do not interfere with one another. The spring is arranged on the push rod, so that self-locking can be achieved when the U-shaped end is clamped through the spring, and the clamping is reliable.

Description

A kind of U-shaped end clamping device of electric tube expander

Technical field

The utility model relates to a kind of U-shaped end clamping device of electric tube expander.

Background technology

The U-shaped end clamping device of the U-shaped pipe of existing heat exchanger has left and right two cramp frames usually, though this clamping device has the more firm advantage of clamping, but its limitation when using, the less workpiece of the U-shaped end clamping device array pitch of many groups is arranged, when array pitch is little, after opening, cramp frame may interfere with another row's cramp frame.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the above-mentioned deficiency of prior art and U-shaped end clamping device that a kind of electric tube expander is provided, can enough save the space.

The utility model solves the problems of the technologies described above the technical scheme that adopts:

A kind of U-shaped end clamping device of electric tube expander, comprise body, cramp frame, the head of body is provided with the U-shaped groove that cooperates with the U-shaped pipe fitting, the body both sides are provided with the straight-line groove of symmetry, a fixed pin shaft is installed on body top, be hinged with a cramp frame at fixed pin shaft, head at cramp frame is provided with the groove that cooperates with the U-shaped end of pipe fitting, the cramp frame bottom also comprises a guiding groove, there is an active pin shaft to pass the straight-line groove of body two sides and the guiding groove on the cramp frame, and it is hinged with push rod, spring housing is on push rod, and the spring upper end is spacing by the body bottom, and the spring lower end is spacing by the projection on the push rod, the body bottom is provided for the bottom bar of fixed body, and push rod is connected with impeller.

Above-mentioned bottom bar is preferably two bottom bars that are arranged in push rod two sides, fixes more balancedly like this, firm.

Compared with prior art, advantage of the present utility model is: owing to have only a cramp frame, therefore be used for the less U-shaped workpiece of array pitch and add man-hour, U-shaped end clamping device between row and row can not interfere.

Also owing at push rod spring is set, can obtain self-locking when by spring U-shaped end being clamped, clamp more reliable.

Description of drawings

Fig. 1 is the stereogram of the U-shaped end clamping device of the utility model embodiment electric tube expander.

Fig. 2 is the stereogram after the U-shaped end clamping device of the utility model embodiment electric tube expander removes body.

Fig. 3 is the stereogram of the utility model embodiment cramp frame.

The specific embodiment

Describe in further detail below in conjunction with the utility model of accompanying drawing embodiment.

As Fig. 1, shown in Figure 2, a kind of U-shaped end clamping device of electric tube expander, comprise body 1, head at body 1 is provided with the U-shaped groove 101 that cooperates with pipe fitting, body 1 both sides are provided with the straight-line groove 102 of symmetry, a fixed pin shaft 2 is installed on body 1 top, be hinged with a cramp frame 3 at fixed pin shaft 2, head at cramp frame 3 is provided with the groove 301 that cooperates with the U-shaped end of pipe fitting, cramp frame 3 bottoms also comprise a guiding groove 302, see Fig. 3, and an active pin shaft 4 passes the straight-line groove 102 of body 1 two sides and the guiding groove 302 on the cramp frame 3, and it is hinged with push rod 5, spring 6 is enclosed within on the push rod 5, and spring 6 upper ends are spacing by body 1 bottom, and spring 6 lower ends are spacing by the projection 51 on the push rod 5, two bottom bars 7 that body 1 bottom is provided for fixing, push rod 5 is connected with impeller (not drawing among the figure).

The course of work of clamping device folder is as follows: when impeller upwards promotes push rod 5, fixed pin shaft 2 is made progress by the guiding straight line of two straight-line grooves 102 on the body 1, guiding groove 302 drive cramp frames 3 by cramp frame 3 bottoms open the groove 101 that leaves body 1, spring 6 compressions, can put into the U-shaped end of workpiece the groove 101 of body 1 this moment, impeller unclamps push rod 4 then, spring 5 recovers nature, it is downward to drive push rod 4, thereby makes cramp frame 3 clamping work pieces by the fixed pin shaft 2 that is connected on the push rod 4 the moving of guiding groove 302 of cramp frame 3 bottoms.

Claims

1. the U-shaped end clamping device of an electric tube expander, it is characterized in that: comprise body, cramp frame, the head of body is provided with the U-shaped groove that cooperates with the U-shaped pipe fitting, the body both sides are provided with the straight-line groove of symmetry, a fixed pin shaft is installed on body top, be hinged with a cramp frame at fixed pin shaft, head at cramp frame is provided with the groove that cooperates with the U-shaped end of pipe fitting, the cramp frame bottom also comprises a guiding groove, there is an active pin shaft to pass the straight-line groove of body two sides and the guiding groove on the cramp frame, and it is hinged with push rod, spring housing is on push rod, and the spring upper end is spacing by the body bottom, and the spring lower end is spacing by the projection on the push rod, the body bottom is provided for the bottom bar of fixed body, and push rod is connected with impeller.

2. the U-shaped end clamping device of electric tube expander as claimed in claim 1, it is characterized in that: described bottom bar is two bottom bars that are arranged in push rod two sides.