CN210788991U

CN210788991U - U-shaped pipe end fixing device

Info

Publication number: CN210788991U
Application number: CN201921235527.7U
Authority: CN
Inventors: 李伟斌; 陈荣荣
Original assignee: Jdm Jingda Machine Ningbo Co ltd
Current assignee: Jdm Jingda Machine Ningbo Co ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-06-19
Anticipated expiration: 2029-08-01

Abstract

The U-shaped pipe end fixing device comprises a body, a fixed pin shaft, two symmetrical left arc-shaped clamps, a right arc-shaped clamp, two symmetrical left rotating blocks, a right rotating block, a movable pin shaft, a pushing block, a bottom rod, a push rod, a spring and a guide rod; the head of the body is provided with a U-shaped groove matched with the pipe fitting, two sides of the body are provided with symmetrical linear grooves, the upper part of the body is provided with a fixed pin shaft, and a left bow clamp and a right bow clamp are hinged on the fixed pin shaft; the movable pin shaft is hinged with one end of a left rotating block and a right rotating block and is sleeved in the pushing block in a penetrating way, the other end of the left rotating block and the right rotating block are respectively rotatably connected with a left arc-shaped clamp and a right arc-shaped clamp, and the two ends of the pushing block are respectively positioned in linear grooves on the two sides of the body; the push rod is sleeved with the bottom rod in a penetrating way, the upper end of the push rod is arranged on the pushing block, and the lower end of the push rod is connected with the pushing piece; the guide rod penetrates through the body, the upper end of the guide rod is installed on the pushing block, the lower end of the guide rod is provided with a spring limiting piece, the spring is sleeved on the guide rod, the upper end of the spring is limited by the body, and the lower end of the spring is limited by the spring limiting piece; the upper part of the bottom rod is arranged on the body, and the lower part of the bottom rod is arranged on the mounting plate.

Description

U-shaped pipe end fixing device

Technical Field

The utility model relates to a U type pipe end fixing device.

Background

The tube expander is used for expanding the diameters of a plurality of heat exchanger tubes arranged in the radiating fins to enable the heat exchanger tubes to be tightly combined with the radiating fins, so that looseness is avoided, the heat conducting performance of the heat exchanger is improved, and in addition, the end parts of the tubes are flared and flanged to facilitate next working procedures.

When the tube expander expands the tube without shrinkage, the two ends of the U tube of the workpiece need to be clamped, and the U tube is forced not to shrink, so that the purpose of saving materials is achieved. The existing U-shaped pipe end fixing device of a workpiece is shown in figures 4 and 5 and is provided with two bottom rods 10 and a push rod 11, so that two bottom rod mounting holes and a hole through which the push rod passes need to be arranged on a mounting plate 16 of the U-shaped pipe end fixing device, if the workpiece is obliquely inserted, holes need to be added, and as shown in figure 5, filled holes are holes through which the push rod passes and are also mounting holes of the two bottom rods, so that the mounting plate 16 has multiple holes, on one hand, the processing time is long, the processing cost is increased, on the other hand, the processing difficulty is increased, and the mounting plate is easy to scrap.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art's above-mentioned defect and provide U type pipe end fixing device, its simple structure.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: u type pipe end fixing device, its characterized in that: the device comprises a body, a fixed pin shaft, two symmetrical left arc-shaped clamps, a right arc-shaped clamp, two symmetrical left rotating blocks, a right rotating block, a movable pin shaft, a pushing block, a bottom rod, a push rod, a spring and a guide rod; the head of the body is provided with a U-shaped groove matched with the pipe fitting, two sides of the body are provided with symmetrical linear grooves, the upper part of the body is provided with the fixed pin shaft, and the left and right arc-shaped clamps are hinged on the fixed pin shaft; the movable pin shaft is hinged with one end of a left rotating block and one end of a right rotating block and is sleeved in the pushing block in a penetrating way, the other ends of the left rotating block and the right rotating block are respectively and rotatably connected with the left bow-shaped clamp and the right bow-shaped clamp, and the two ends of the pushing block are respectively positioned in the linear grooves on the two sides of the body; the push rod is sleeved with a bottom rod in a penetrating manner, the upper end of the push rod is installed on the pushing block, and the lower end of the push rod is connected with the pushing piece; the guide rod penetrates through the body, the upper end of the guide rod is installed on the pushing block, the lower end of the guide rod is provided with a spring limiting piece, the spring is sleeved on the guide rod, the upper end of the spring is limited by the body, and the lower end of the spring is limited by the spring limiting piece of the guide rod; the upper part of the bottom rod is arranged on the body, and the lower part of the bottom rod is arranged on the mounting plate.

Preferably, the lower end spring locating part of guide bar is the boss, makes easily like this.

Preferably, the guide rod is arranged in the body, so that the spring cannot be exposed out of the body, and dust and other impurities are prevented from entering the body.

Preferably, two ends of the movable pin shaft are limited by the limiting parts, so that the movable pin shaft is prevented from being separated from the linear grooves on two sides of the body.

Preferably, the other ends of the left rotating block and the right rotating block are respectively connected with the left bow-shaped clamp and the right bow-shaped clamp through pivots, so that the connection is more stable.

Compared with the prior art, the utility model has the advantages of: the U-shaped pipe end fixing device is simple in structure and high in reliability, and a plurality of holes are not required to be formed in the mounting plate, so that the processing cost is reduced.

Drawings

Fig. 1 is a schematic perspective view of a U-shaped tube end fixing device according to an embodiment of the present invention.

Fig. 2 is a schematic view of a three-dimensional structure of a U-shaped tube end fixing device with a body removed according to an embodiment of the present invention.

Fig. 3 is a schematic view of a partial structure of a U-shaped tube end fixing device according to an embodiment of the present invention.

Fig. 4 is a partial cross-sectional view of a U-shaped tube end fixing device according to an embodiment of the present invention. Fig. 5 is a schematic perspective view of a conventional fixing device.

Fig. 6 is a schematic perspective view of a mounting plate of a conventional fixing device.

Fig. 7 is a schematic perspective view of a mounting plate of a U-shaped tube end fixing device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1, 2 and 3, a U-tube end fixing device includes: the device comprises a body 1, a fixed pin shaft 2, a left arch clamp 3, a right arch clamp 4, a left rotating block 5, a right rotating block 6, a movable pin shaft 7, a pivot 8, a pushing block 9, a bottom rod 10, a push rod 11, a spring 12 and a spring guide rod 13.

The head of the body 1 is provided with a U-shaped groove 101 matched with a pipe fitting, two sides of the body 1 are provided with symmetrical linear grooves 102, the upper part of the body 1 is provided with a fixed pin shaft 2, the fixed pin shaft 2 is hinged with two symmetrical left and right arc-

shaped clamps

3 and 4, the movable pin shaft 7 is hinged with one ends of two symmetrical left rotating blocks 5 and right rotating blocks 6 and is sleeved in a pushing block 9 in a penetrating manner, two ends of the pushing block 9 are respectively positioned in the linear grooves 102 at the two sides of the body 1, the other ends of the left rotating blocks 5 and the right rotating blocks 6 are respectively connected with the left and right arc-

shaped clamps

3 and 4 through pivots 8, the push rod 11 is arranged on the pushing block 9 in a penetrating manner, the upper end of the bottom rod 10 is arranged on the body 1, the lower end of the bottom rod 10 is arranged on the mounting plate 16, and the push rod 11 is connected with a pushing piece (not shown.

As shown in fig. 4, the spring guide rod 13 passes through the through hole 103 at the bottom of the body 1, the upper end of the spring guide rod 13 is installed on the pushing block 9, the lower end of the spring guide rod is provided with a boss 1301, the whole spring guide rod 13 is arranged in the body, the spring 12 is sleeved on the spring guide rod 13, the upper end of the spring 12 is limited by the bottom edge of the through hole 103 on the body 1, and the other end of the spring 12 is limited by the boss 1301 of.

In order to prevent the movable pin 7 from coming out of the pushing block 9, the limit is realized by limit screws 15 arranged at both ends of the pushing block 9.

When the pushing piece of the fixing device pushes the push rod 11 upwards, the pushing block 9 moves upwards along the linear groove 102 and drives the movable pin 7 upwards, so that the distance between the two pivots 8 is increased, the heads of the left and right

arcuate clamps

3 and 4 move in opposite directions, the head distance is reduced, and the pipe fitting is clamped.

When the push rod 11 is released, under the action of the spring force of the spring 12, the push rod 11 moves downwards, so that the push rod 11 drives the push rod block 9 to move downwards, the distance between the two pivots 8 is reduced, the heads of the left and

right arch clamps

3 and 4 move in opposite directions, the head distance is enlarged, and the pipe fitting is released.

The U-tube end fixing device is mounted on a mounting plate 16 of a pipe expander, as shown in fig. 6, by applying the fixing device of fig. 5, the arrangement of holes provided on the mounting plate 16 is shown. Under the condition of same specification, by applying the device, as shown in fig. 7, filled holes are not needed at all, the number of the holes is obviously reduced, the processing cost is obviously reduced, and the efficiency is greatly improved.

Claims

U type pipe end fixing device, its characterized in that: the device comprises a body, a fixed pin shaft, two symmetrical left arc-shaped clamps, a right arc-shaped clamp, two symmetrical left rotating blocks, a right rotating block, a movable pin shaft, a pushing block, a bottom rod, a push rod, a spring and a guide rod; the head of the body is provided with a U-shaped groove matched with the pipe fitting, two sides of the body are provided with symmetrical linear grooves, the upper part of the body is provided with the fixed pin shaft, and the left and right arc-shaped clamps are hinged on the fixed pin shaft; the movable pin shaft is hinged with one end of a left rotating block and one end of a right rotating block and is sleeved in the pushing block in a penetrating way, the other ends of the left rotating block and the right rotating block are respectively and rotatably connected with the left bow-shaped clamp and the right bow-shaped clamp, and the two ends of the pushing block are respectively positioned in the linear grooves on the two sides of the body; the push rod is sleeved with a bottom rod in a penetrating manner, the upper end of the push rod is installed on the pushing block, and the lower end of the push rod is connected with the pushing piece; the guide rod penetrates through the body, the upper end of the guide rod is installed on the pushing block, the lower end of the guide rod is provided with a spring limiting piece, the spring is sleeved on the guide rod, the upper end of the spring is limited by the body, and the lower end of the spring is limited by the spring limiting piece of the guide rod; the upper part of the bottom rod is arranged on the body, and the lower part of the bottom rod is arranged on the mounting plate.
2. The U-tube end securement device of claim 1, wherein: the lower end spring limiting part of the guide rod is a boss.
3. The U-tube end securement device of claim 1, wherein: the guide rod is arranged in the body.
4. The U-tube end securement device of claim 1, wherein: two ends of the movable pin shaft are limited by the limiting part, so that the movable pin shaft is prevented from being separated.
5. The U-tube end securement device of claim 1, wherein: the other ends of the left rotating block and the right rotating block are respectively connected with the left bow-shaped clamp and the right bow-shaped clamp through pivots.