Pipe expander chuck with improved structure

Abstract

The utility model provides a pipe expander chuck with an improved structure, and belongs to the field of electric tool accessories. The problem that an existing chuck is short in service life is solved. The pipe expander chuck of the improved structure comprises a left module and a right module, the front end of the left module and the front end of the right module are hinged through a vertically-arranged rotating shaft, and the left module and the right module can be combined in an abutting mode to form a clamping hole used for clamping a pipe fitting. The rear ends of the left module and the right module are connected through a connecting assembly so that the left module and the right module can be kept in a combined or separated state, an annular positioning boss coaxial with the clamping hole is formed on the lower side of the left module, a blocking piece is horizontally arranged between the positioning boss and the right module, the rotating shaft is sleeved with the front end of the blocking piece, and the lower opening of the clamping hole can be shielded by swinging the blocking piece. And a magnetic block is fixed on the lower side of the right module, and the magnetic block can be magnetically adsorbed on the upper side of the rear end of the separation blade. The pipe expander chuck with the improved structure is long in service life.

Description

Technical Field

[0001] The utility model belongs to the field of electric tool accessories and relates to a pipe expander chuck, in particular to a pipe expander chuck with an improved structure. Background Art

[0002] A pipe expander is a tool mainly used to open holes or expand the openings of various pipes. It can expand the pipe opening into a bell-shaped shape, or expand one of the pipe openings into a cylindrical shape to facilitate the connection and brazing of two pipes.

[0003] The chuck is an important component of the tube expander, which is used to clamp the tube to be expanded. Its structure is like a chuck of a tube expander disclosed in the Chinese Patent Library (application number: 202223465371.6), which is installed on the tube expander and is used to expand the metal tube, including: a right fixed bracket, which is provided with a right mold mounting position, and the end face of the right fixed bracket has a fixed boss; a left fixed bracket, which is connected to the right fixed bracket, and the left fixed bracket is provided with a left mold mounting position; a right mold assembly, which is installed in the right mold mounting position; a left mold assembly, which is installed in the left mold mounting position, and cooperates with the right mold assembly to form a tube expansion cavity; wherein, positioning planes 1 are oppositely opened on the outer side surface of the right mold assembly, and positioning planes 2 are oppositely opened on the outer side surface of the left mold assembly, and positioning planes 1 and 2 are perpendicular to the The splicing line of the right mold assembly and the left mold assembly; a limiting protrusion 1 is provided on the right fixed bracket protruding toward the left fixed bracket; a limiting groove 1 is provided on the left fixed bracket; when the limiting protrusion 1 is inserted into the limiting groove 1, the right mold assembly and the left mold assembly abut against each other, and the limiting protrusion 1 abuts against the positioning plane 1 and the positioning plane 2 at the same time; a positioning assembly is installed on the right fixed bracket, which is located between the left fixed bracket and the fixed boss; wherein the positioning assembly comprises: a positioning plate, which is rotatably installed on the right fixed bracket, and the positioning plate has an abutting portion; a reset elastic member, which is installed on the right fixed bracket and connected to the abutting portion, for making the positioning plate have a restoring force; the reset elastic member drives the positioning plate to cover the opening of the expansion cavity, and the positioning plate does not overlap with the tapered end of the expansion shaft of the expansion device.

[0004] In the above-mentioned chuck, the positioning plate is controlled by a resetting elastic member. After long-term use, the elasticity of the resetting elastic member will become weaker and weaker, affecting the normal swing of the positioning plate. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a pipe expander chuck with a long service life and an improved structure.

[0006] The purpose of the utility model can be achieved through the following technical solutions: an improved structure of a pipe expander chuck, comprising a left module and a right module, and the front ends of the left module and the right module are hinged by a vertically arranged rotating shaft, the left module and the right module can be closely combined to form a clamping hole for clamping pipe fittings, and the rear ends of the left module and the right module are connected by a connecting assembly so that the left module and the right module remain in a combined or separated state, a positioning boss coaxial with the clamping hole and in an annular shape is formed on the lower side of the left module, a baffle is horizontally arranged between the positioning boss and the right module, the front end of the baffle is sleeved on the rotating shaft, and the swinging baffle can block the lower orifice of the clamping hole, and is characterized in that the baffle is made of magnetic conductive material, a magnetic block is fixed to the lower side of the right module, and the magnetic block can be magnetically adsorbed on the upper side of the rear end of the baffle.

[0007] When in use, under the adsorption of the magnetic block, the baffle follows the right module to swing inward to cover the lower hole of the clamping hole. At this time, the lower end of the pipe clamped in the clamping hole is pressed on the baffle to limit the insertion length of the pipe. When expanding the pipe, the expanding shaft of the pipe expander extends into the clamping hole and pushes the baffle to overcome the suction force of the magnetic block and swing outward to form an avoidance, ensuring that the expanding shaft extends into the clamping hole without obstacles for the pipe expanding operation. After the pipe expansion is completed, the right module swings outward to re-adsorb the baffle.

[0008] The right module uses magnetic blocks to absorb the baffle so that the baffle can swing with the right module and can also get rid of the magnetic block absorption under the action of the expanding shaft of the tube expander. There is basically no wear and loss in the whole process, and it has the advantages of stable operation and long service life.

[0009] In the above-mentioned improved structure of the expander chuck, the chuck also includes a limiting structure for limiting the swing amplitude of the baffle, so that the baffle can be moved to the shielding position at one time and the baffle and the right module can be prevented from being excessively separated, making the chuck work more stably.

[0010] In the above-mentioned improved structure of the expander chuck, the limiting structure is arranged between the middle part of the baffle and the positioning boss, which is convenient for design and processing.

[0011] In the above-mentioned improved structure of the expander chuck, the limiting structure includes an arc groove opened on the baffle and a guide pin arranged on the positioning boss and matched with the arc groove. The arc groove and the rotating shaft are coaxially arranged, and both ends of the arc groove are closed. The guide pin is inserted into the arc groove. With the cooperation of the arc groove and the guide pin, the swing amplitude of the baffle is stably limited to ensure the stable operation of the chuck.

[0012] In the above-mentioned improved structure of the expander chuck, the guide pin and the positioning boss are an integrated structure to facilitate assembly.

[0013] As another solution, in the above-mentioned improved structure of the expander chuck, the limiting structure includes an arc notch vertically penetrating through the front end of the baffle, and the arc notch is coaxially arranged with the rotating shaft, a positioning ring is sleeved and fixed on the rotating shaft, a round rod is vertically fixed on the lower side of the positioning ring, and the round rod is inserted in the arc notch, so as to limit the baffle by the round rod contacting the two end surfaces of the arc notch respectively.

[0014] In the above-mentioned improved structure of the expander chuck, a positioning hole matching the magnetic block is opened on the bottom wall of the right module, and the magnetic block is embedded in the positioning hole to facilitate the installation and positioning of the magnetic block.

[0015] Compared with the prior art, the pipe expander chuck of the improved structure has the following advantages:

[0016] 1. The right module uses magnetic blocks to absorb the baffle so that the baffle can swing with the right module and can also get rid of the magnetic block adsorption under the action of the tube expander expansion shaft. There is basically no wear and loss in the whole process, and it has the advantages of stable operation and long service life.

[0017] 2. Under the action of the limiting structure, the baffle can be moved to the blocking position at one time, and the baffle and the right module can be prevented from being excessively separated, making the chuck work more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a pipe expander chuck with an improved structure.

[0019] Figure 2 It is a cross-sectional schematic diagram of a pipe expander chuck with an improved structure.

[0020] Figure 3 It is a schematic diagram of the structure of the improved structure of the expander chuck after removing the right module.

[0021] Figure 4 It is a structural diagram of the right module.

[0022] In the figure, 1, left module; 1a, positioning boss; 1b, guide pin; 1c, left mold base; 1d, left pressure block; 2, right module; 2a, right mold base; 2b, right pressure block; 3, rotating shaft; 4, clamping hole; 5, connecting component; 6, semicircular block; 7, baffle; 7a, arc groove; 8, magnetic block. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Embodiment 1

[0024] like Figure 1As shown, the expander chuck of the improved structure includes a left module 1 and a right module 2 which are arranged opposite to each other, and the left module 1 and the right module 2 are both arranged horizontally.

[0025] Specifically,

[0026] The front ends of the left module 1 and the right module 2 are hinged by a vertically arranged rotating shaft 3, and the left module 1 and the right module 2 can be closely combined to form a clamping hole 4 for clamping the pipe fittings. The clamping hole 4 is in the shape of a circular hole, and the axis of the clamping hole 4 extends up and down. In the actual product, the inner wall of the clamping hole 4 at the hole mouth is a conical surface, and the two conical surfaces are symmetrically arranged.

[0027] The rear ends of the left module 1 and the right module 2 are connected by a connecting assembly 5 so that the left module 1 and the right module 2 remain in a combined or separated state. The connecting assembly 5 is an existing structure, and specific reference may be made to a quick-clamp assembly described in a chuck of a pipe expander disclosed in the Chinese patent library (application number: 202223465371.6), which will not be described in detail here.

[0028] Further explanation, such as Figures 2 to 4 As shown, semicircular blocks 6 are fixed on the left sides of both ends of the right module 2, and two corresponding sockets are provided on the left module 1. The shape and size of the sockets match the semicircular blocks 6. When the left module 1 and the right module 2 are closely combined, the two semicircular blocks 6 are respectively inserted into the two sockets to prevent the left module 1 and the right module 2 from sliding relative to each other during pipe expansion, so that the clamping hole 4 can be formed more stably.

[0029] like Figure 2 and Figure 3 As shown, a positioning boss 1a coaxial with the clamping hole 4 and in an annular shape is formed on the lower side of the left module 1, and a baffle 7 is horizontally arranged between the positioning boss 1a and the right module 2. A through hole matching the rotating shaft 3 is vertically penetrated at the front end of the baffle 7. The baffle 7 is sleeved on the rotating shaft 3 through the through hole, and the swinging baffle 7 can block the lower opening of the clamping hole 4. Preferably, the upper and lower sides of the baffle 7 are respectively attached to the bottom surface of the right module 2 and the top surface of the positioning boss 1a, so that the baffle 7 can obtain better support and swing stably. The baffle 7 is made of magnetic conductive material, and the magnetic conductive material can be an iron-containing alloy, a nickel-containing alloy, etc. A magnetic block 8 is fixed on the lower side of the right module 2, and the magnetic block 8 can be magnetically adsorbed on the upper side of the rear end of the baffle 7.

[0030] When in use, under the adsorption of the magnetic block 8, the baffle 7 follows the right module 2 to swing inward to cover the lower opening of the clamping hole 4. At this time, the lower end of the pipe clamped in the clamping hole 4 is pressed on the baffle 7 to limit the insertion length of the pipe; when expanding the pipe, the expanding shaft of the pipe expander extends into the clamping hole 4 and pushes the baffle 7 to overcome the suction force of the magnetic block 8 and swing outward to form an avoidance, ensuring that the expanding shaft extends into the clamping hole 4 without hindrance to perform the pipe expanding operation; after the pipe expansion is completed, the right module 2 swings outward to re-adsorb the baffle 7.

[0031] The right module 2 uses the magnetic block 8 to absorb the baffle 7 so that the baffle 7 can swing with the right module 2 and can also get rid of the absorption of the magnetic block 8 under the action of the expanding shaft of the expander. There is basically no wear and loss in the whole process, and it has the advantages of stable operation and long service life.

[0032] Further explanation, the chuck also includes a limiting structure for limiting the swing amplitude of the baffle 7, so that the baffle 7 can be moved to the shielding position at one time, and excessive separation of the baffle 7 and the right module 2 can be prevented, so that the chuck can work more stably.

[0033] In this embodiment,

[0034] like Figure 3 and Figure 4 As shown, the limiting structure is arranged between the middle part of the baffle 7 and the positioning boss 1a. The limiting structure includes a circular arc groove 7a provided on the baffle 7 and a guide pin 1b provided on the positioning boss 1a and matched with the circular arc groove 7a. The circular arc groove 7a and the rotating shaft 3 are coaxially arranged, and both ends of the circular arc groove 7a are closed. The guide pin 1b is inserted into the circular arc groove 7a. With the cooperation of the circular arc groove 7a and the guide pin 1b, the swing amplitude of the baffle 7 is stably limited to ensure the stable operation of the chuck. It is preferred that the guide pin 1b and the positioning boss 1a are an integrated structure for easy assembly. Naturally, it is also possible for the guide pin 1b and the positioning boss 1a to adopt a split structure.

[0035] The magnetic block 8 is installed as follows: a positioning hole matching the magnetic block 8 is opened on the bottom wall of the right module 2, and the magnetic block 8 is embedded in the positioning hole to facilitate the installation and positioning of the magnetic block 8.

[0036] In the actual product, the right module 2 includes a right mold base 2a and a right pressure block 2b, and the left module 1 includes a left mold base 1c and a left pressure block 1d, wherein the front ends of the left mold base 1c and the right mold base 2a are connected by the above-mentioned rotating shaft 3, and the rear ends of the left mold base 1c and the right mold base 2a are connected by the above-mentioned connecting assembly 5; the left mold base 1c and the right mold base 2a are provided with a left cavity and a right cavity on the adjacent side walls, and the left clamp block and the right pressure block 2b are respectively arranged in the left cavity and the right cavity, and the left clamp block and the left mold base 1c are fixedly connected by horizontally arranged screws, and the right clamp block and the right mold base 2a are also fixedly connected by horizontally arranged screws, and the above-mentioned clamp hole 4 is formed between the left pressure block 1d and the right pressure block 2b. The above-mentioned positioning boss 1a and the jack are both arranged on the left mold base 1c; the above-mentioned semicircular block 6 is arranged on the right mold base 2a. Embodiment 2

[0037] The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that the limiting structure includes an arc notch vertically penetrating the front end of the baffle 7, and the arc notch is coaxially arranged with the rotating shaft 3, a positioning ring is sleeved and fixed on the rotating shaft 3, a round rod is vertically fixed on the lower side of the positioning ring, and the round rod is inserted into the arc notch, so as to limit the baffle 7 by the round rod contacting the two end surfaces of the arc notch respectively.

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A pipe expander chuck of improved structure, comprising a left module (1) and a right module (2), wherein the front ends of the left module (1) and the right module (2) are hingedly connected by a vertically arranged rotating shaft (3), the left module (1) and the right module (2) can be closely combined to form a clamping hole (4) for clamping a pipe fitting, and the rear ends of the left module (1) and the right module (2) are connected by a connecting assembly (5) so that the left module (1) and the right module (2) can be kept in a combined or separated state, a positioning boss (1a) coaxial with the clamping hole (4) and in an annular shape is formed on the lower side of the left module (1), a baffle (7) is horizontally arranged between the positioning boss (1a) and the right module (2), the front end of the baffle (7) is sleeved on the rotating shaft (3), and the swinging baffle (7) can cover the lower opening of the clamping hole (4), characterized in that: The baffle (7) is made of a magnetic conductive material, a magnetic block (8) is fixed on the lower side of the right module (2), and the magnetic block (8) can be magnetically adsorbed on the upper side of the rear end of the baffle (7).

2. The improved structure of the expander chuck according to claim 1 is characterized in that: The chuck also includes a limiting structure for limiting the swing amplitude of the baffle (7).

3. The improved structure of the expander chuck according to claim 2 is characterized in that: The limiting structure is arranged between the middle part of the blocking piece (7) and the positioning boss (1a).

4. The improved structure of the expander chuck according to claim 3 is characterized in that: The limiting structure comprises an arc groove (7a) provided on the baffle (7) and a guide pin (1b) provided on the positioning boss (1a) and matching the arc groove (7a); the arc groove (7a) and the rotating shaft (3) are coaxially arranged, and both ends of the arc groove (7a) are closed; the guide pin (1b) is inserted into the arc groove (7a).

5. The improved structure of the expander chuck according to claim 4 is characterized in that: The guide pin (1b) and the positioning boss (1a) are an integrated structure.

6. The improved structure of the expander chuck according to claim 2 is characterized in that: The limiting structure comprises an arc notch vertically penetrating the front end of the baffle (7), and the arc notch is coaxially arranged with the rotating shaft (3), a positioning ring is sleeved and fixed on the rotating shaft (3), a round rod is vertically fixed on the lower side of the positioning ring, and the round rod is inserted into the arc notch.

7. The improved structure of the expander chuck according to claim 1 is characterized in that: A positioning hole matching the magnetic block (8) is provided on the bottom wall of the right module (2), and the magnetic block (8) is embedded in the positioning hole.

Images