Pipe expander chuck

Abstract

The utility model provides a pipe expander chuck, and belongs to the technical field of machinery. The problem that an existing chuck affects the pipe expanding stability is solved. The pipe expander chuck comprises a left module, a right module and a blocking piece, the front end of the left module and the front end of the right module are hinged through a vertically-arranged rotating shaft, 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 end of the left module and the rear end of the right module are connected through a connecting assembly, and the blocking piece is horizontally arranged. The two ends of the blocking piece are a connecting end and a shielding end respectively, the connecting end is hinged to the right module, a torsional spring enabling the shielding end to tend to swing to the clamping hole is arranged at the hinged position, the blocking piece is arranged on the lower side of the rear end of the right module, a driving rod is vertically fixed to the blocking piece, and the left module is provided with a backing face. The backer face can make contact with the driving rod to drive the shielding end to overcome torsion of the torsional spring to be away from the clamping hole. The pipe expander chuck can enhance the pipe expanding stability.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a pipe expander, particularly a pipe expander clamp. Background Technology

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

[0003] The clamp is an important component of the pipe expander, used to clamp the pipe to be expanded. Its structure is as disclosed in the Chinese Patent Database (application number: 202223465371.6). Installed on the pipe expander, it is used for expanding metal pipes. It includes: a right fixed bracket with a right mold mounting position and a fixing boss on its end face; a left fixed bracket connected to the right fixed bracket, with a left mold mounting position; a right mold assembly installed in the right mold mounting position; and a left mold assembly installed in the left mold mounting position, which cooperates with the right mold assembly to form an expanding cavity. The right mold assembly has a first positioning plane opposite to each other on its outer surface, and the left mold assembly has a second positioning plane opposite to each other on its outer surface. Positioning planes one and two are perpendicular to the splicing line of the right and left mold assemblies. The right fixed bracket faces the left fixed bracket... The frame protrudes with a limiting protrusion; the left fixed bracket has a limiting groove; when the limiting protrusion is inserted into the limiting groove, the right mold assembly and the left mold assembly abut against each other, and the limiting protrusion simultaneously abuts against positioning plane one and positioning plane two; a positioning component is installed on the right fixed bracket, located between the left fixed bracket and the fixed boss; wherein the positioning component includes: a positioning plate, which is rotatably mounted on the right fixed bracket, and the positioning plate has an abutment portion; a reset elastic element, which is mounted on the right fixed bracket and connected to the abutment portion, for giving the positioning plate a restoring force; the reset elastic element drives the positioning plate to block the opening of the expander cavity, and the positioning plate does not coincide with the tapered end of the expander shaft.

[0004] When using the above-mentioned expander clamp, the positioning plate needs to be pushed open by the tapered end of the expander shaft to fully expose the expander cavity. However, during the pushing process, the positioning plate comes into contact with and rubs against the side wall of the tapered end, which can easily cause wear on the tapered end, affecting the quality of the expander. Moreover, as the wear on the tapered end increases, it will directly affect the expander process. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a expander clamp that can improve the working stability of the expander.

[0006] The purpose of this utility model can be achieved through the following technical solution: A pipe expander clamp includes a left module, a right module, and a baffle. The front ends of the left and right modules are hinged by a vertically arranged pivot. The left and right modules can be tightly joined to form a clamping hole for clamping pipe fittings. The rear ends of the left and right modules are connected by a connecting component to keep the left and right modules in a joined or separated state. The baffle is horizontally arranged, with a connecting end and a blocking end at both ends. The connecting end is hinged to the right module, and a torsion spring is provided at the hinge to make the blocking end swing towards the clamping hole. The baffle is located on the lower side of the rear end of the right module, and a drive rod is vertically fixed on the baffle. The left module has a backing surface, and during the joining process of the left and right modules, the backing surface can contact the drive rod to drive the blocking end to overcome the torsion force of the torsion spring and move away from the clamping hole position.

[0007] In the actual product, the left and right modules each have a vertically penetrating semicircular hole on their opposite sidewalls, and the two semicircular holes form the aforementioned clamping hole.

[0008] The process of using this chuck is as follows: In the initial state, the baffle end is in the clamping hole position; then, the copper tube is inserted into the semi-circular hole of the right module and pressed on the baffle for limiting; then, the left module is swung to move closer to the right module to clamp the copper tube. During this process, the backing surface on the left module will contact the drive rod on the baffle, causing the baffle end to move away from the clamping hole to avoid it, so that the tube expander's expanding shaft can be inserted into the copper tube more smoothly for tube expansion operation.

[0009] By using components such as baffles, torsion springs, backing surfaces, and drive rods, the system not only limits the insertion of the copper tube but also ensures that the baffles automatically move away from the clamping holes during the combination of the left and right modules. This prevents the expansion shaft of the expander from contacting the baffles and causing wear during tube expansion, thus effectively ensuring the quality and stability of tube expansion.

[0010] In the aforementioned expander clamp, the rear bottom wall of the right module has a notch, and the connecting end is located within the notch; the drive rod is located above the connecting end, and the right side of the left module is the aforementioned backing surface. This design simplifies the structure, reduces the overall thickness of the clamp, and minimizes space occupation.

[0011] In the aforementioned expander clamp, a vertical insertion hole matching the drive rod is passed through the connecting end, and the lower end of the drive rod is embedded in the insertion hole to facilitate the installation of the drive rod.

[0012] In the aforementioned expander clamp, the right module is also equipped with a limiting structure to restrict the amplitude of the baffle's swing towards the clamping hole. Under the action of the limiting structure, the blocking end swings to the clamping hole and stays there. The addition of the limiting structure allows for an increase in the torque of the torsion spring on the baffle during actual design, making the baffle swing smoother and more stable.

[0013] In the aforementioned expander clamp, the limiting structure includes a limiting rod that is vertically fixed on the lower side of the rear end of the right module. The limiting rod is located on one side of the connecting end, and the connecting end can press against the limiting rod under the action of the torsion spring to limit the baffle from continuing to swing. It has the advantages of simple structure and stable operation.

[0014] In the above-mentioned tube expander clamp, the baffle includes an arc-shaped main body, and the central axes of the main body and the clamping hole are arranged parallel to each other; one end of the main body is the above-mentioned blocking end, and a protrusion is formed on the rear side of the other end of the main body, and the other end of the main body and the protrusion form the above-mentioned connecting end; the above-mentioned limiting rod is arranged on the rear side of the other end of the main body, and the driving rod is arranged on the connecting end.

[0015] As another option, in the aforementioned expander clamp, the limiting structure includes a stop bar vertically formed on the connecting end and a stop block formed on the right module, and the stop bar can press against the stop block under the action of a torsion spring.

[0016] Compared with existing technologies, this expander clamp has the following advantages:

[0017] 1. Through the cooperation of components such as baffle, torsion spring, backing surface, and drive rod, the copper tube insertion limit is achieved, and the baffle automatically moves away from the clamping hole during the combination of the left and right modules to avoid contact. In this way, the tube expanding shaft of the tube expander will not come into contact with the baffle and cause wear during tube expansion, thus effectively ensuring the quality and stability of tube expansion.

[0018] 2. The inclusion of a limiting structure allows for an increase in the torque of the torsion spring on the baffle during actual design, resulting in smoother and more stable oscillation of the baffle. Attached Figure Description

[0019] Figure 1 This is a 3D diagram of the expander clamp when it is not in use.

[0020] Figure 2 This is a three-dimensional view of the expander clamp in another direction when it is not in use.

[0021] Figure 3 This is a 3D diagram of the expander clamp in use.

[0022] Figure 4 This is a cross-sectional view of the expander clamp in use.

[0023] In the diagram, 1 is the left module; 1a is the backing surface; 2 is the right module; 2a is the notch; 3 is the baffle; 3a is the connecting end; 3b is the blocking end; 3c is the main body; 4 is the rotating shaft; 5 is the clamping hole; 5a is the semi-circular hole; 6 is the connecting component; 7 is the torsion spring; 8 is the drive rod; and 9 is the limit rod. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] Example 1: As Figure 1 As shown, this expander clamp includes a left module 1, a right module 2, and a baffle 3.

[0026] in,

[0027] The front ends of the left module 1 and the right module 2 are hinged together by a vertically arranged pivot 4, allowing them to fit together to form a clamping hole 5 for clamping the pipe fitting. Specifically, each of the opposite sidewalls of the left module 1 and the right module 2 has a vertically penetrating semicircular hole 5a, which, when joined together, forms the clamping hole 5. The rear ends of the left module 1 and the right module 2 are connected by a connecting component 6, allowing them to remain joined or separated.

[0028] In the actual product, the structure of the left module 1 and the right module 2 and their connection method are existing. For details, please refer to the improved structure of the expander clamp proposed by the applicant (application number: 202420929072.3). The improvement of this application is mainly focused on the change of the installation method of the baffle 3.

[0029] Specifically

[0030] like Figures 1 to 4 As shown, the baffle 3 is horizontally positioned, with a connecting end 3a and a blocking end 3b at its two ends. The connecting end 3a is hinged to the right module 2, and a torsion spring 7 is provided at the hinge to cause the blocking end 3b to swing towards the clamping hole 5. The baffle 3 is located on the lower rear end of the right module 2, and a drive rod 8 is vertically fixed on the baffle 3. The left module 1 has a backing surface 1a, and during the combination of the left module 1 and the right module 2, the backing surface 1a can contact the drive rod 8 to drive the blocking end 3b to overcome the torsion force of the torsion spring 7 and move away from the clamping hole 5.

[0031] The process of using this clamp is as follows: In the initial state, the blocking end 3b of the baffle 3 is in the clamping hole 5 position; then the copper tube is inserted into the semi-circular hole 5a of the right module 2 and pressed on the baffle 3 for limiting; then the left module 1 is swung to move closer to the right module 2 to clamp the copper tube. During this process, the backing surface 1a on the left module 1 will contact the drive rod 8 on the baffle 3, causing the blocking end 3b of the baffle 3 to move away from the clamping hole 5 to avoid it, so that the tube expander's tube expanding shaft can be inserted into the copper tube more smoothly for tube expanding operation.

[0032] By cooperating with components such as baffle 3, torsion spring 7, backing surface 1a, and drive rod 8, the baffle 3 is automatically moved away from clamping hole 5 during the combination of left module 1 and right module 2, thus avoiding contact between the expansion shaft of the expander and the baffle 3 during expansion, thereby effectively ensuring the quality and stability of expansion.

[0033] To further explain, the rear bottom wall of the right module 2 has a notch 2a, and the connecting end 3a is located within the notch 2a. The drive rod 8 is located on the upper side of the connecting end 3a, and the right side of the left module 1 is the aforementioned backing surface 1a. This design simplifies the structure and reduces the overall thickness of the chuck, thus minimizing space occupation.

[0034] In this embodiment,

[0035] The connecting end 3a is hinged to the right module 2 by a vertically set bolt. The torsion spring 7 is sleeved on the bolt shank, and the two ends of the torsion spring 7 are connected to the connecting end 3a and the right module 2 respectively.

[0036] The drive rod 8 is installed as follows: a matching insertion hole is vertically inserted through the connecting end 3a, and the lower end of the drive rod 8 is embedded in the insertion hole to facilitate the installation of the drive rod 8.

[0037] like Figure 2 and Figure 3 As shown, the right module 2 is also equipped with a limiting structure to limit the amplitude of the swing of the baffle 3 towards the clamping hole 5. Under the action of the limiting structure, the blocking end 3b swings to the clamping hole 5 and stops. The inclusion of the limiting structure allows for a larger torque of the torsion spring 7 on the baffle 3 during actual design, making the swing of the baffle 3 smoother and more stable. Specifically, the limiting structure includes a limiting rod 9 vertically fixed to the lower rear end of the right module 2. The limiting rod 9 is located on one side of the connecting end 3a. Under the action of the torsion spring 7, the connecting end 3a can press against the limiting rod 9 to limit the continued swing of the baffle 3. It has the advantages of simple structure and stable operation.

[0038] In the actual product, the baffle 3 includes an arc-shaped main body 3c, and the central axes of the main body 3c and the clamping hole 5 are arranged parallel to each other. One end of the main body 3c is the aforementioned blocking end 3b, and a protrusion is formed on the rear side of the other end of the main body 3c. The other end of the main body 3c and the protrusion form the aforementioned connecting end 3a. The aforementioned limiting rod 9 is located on the rear side of the other end of the main body 3c, and the driving rod 8 is located on the connecting end 3a.

[0039] Example 2: The structure and principle of Example 2 are basically the same as those of Example 1. The difference is that the limiting structure includes a stop bar formed vertically on the connecting end 3a and a stop block formed on the right module 2. The stop bar can press against the stop block under the action of the torsion spring 7.

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A pipe expander chuck, comprising a left module (1), a right module (2) and a baffle (3), the front ends of the left module (1) and the right module (2) are hinged by a vertical pivot (4), the left module (1) and the right module (2) can be closely combined to form a clamping hole (5) for clamping a pipe, and the rear ends of the left module (1) and the right module (2) are connected by a connecting assembly (6) to keep the left module (1) and the right module (2) in a combined or separated state, the baffle (3) is horizontally arranged, the two ends of the baffle (3) are respectively a connecting end (3a) and a shielding end (3b), the connecting end (3a) is hinged with the right module (2), and a torsional spring (7) is arranged at the hinge to make the shielding end (3b) have a tendency to swing to the clamping hole (5), characterized in that, The baffle piece (3) is arranged at the lower side of the rear end of the right module (2), and a driving rod (8) is vertically fixed on the baffle piece (3). The left module (1) has an abutment surface (1a), and the abutment surface (1a) can contact the driving rod (8) to drive the shielding end (3b) to overcome the torsion of the torsion spring (7) and move away from the clamping hole (5) during the combination of the left module (1) and the right module (2).

2. The collet chuck of claim 1 wherein, The rear end bottom wall of the right module (2) is provided with a notch (2a), and the connecting end (3a) is arranged in the notch (2a); the driving rod (8) is arranged on the upper side of the connecting end (3a), and the right side surface of the left module (1) is the abutment surface (1a).

3. The collet chuck of claim 2 wherein, The connecting end (3a) is vertically penetrated by a plug hole matched with the driving rod (8), and the lower end of the driving rod (8) is embedded in the plug hole.

4. The expander collet chuck according to claim 1 or 2 or 3, characterized in that, The right module (2) is further provided with a limiting structure for limiting the swing range of the baffle piece (3) to the direction of the clamping hole (5), and under the action of the limiting structure, the shielding end (3b) swings to the clamping hole (5) and stays.

5. The expander collet chuck of claim 4 wherein, The limiting structure includes a limiting rod (9) vertically fixed on the lower side of the rear end of the right module (2), and the limiting rod (9) is arranged on one side of the connecting end (3a), and the connecting end (3a) can be pressed against the limiting rod (9) under the action of the torsion spring (7).

6. The collet chuck of claim 5 wherein, The baffle piece (3) includes a main body (3c) in the shape of a circular arc, and the central axes of the main body (3c) and the clamping hole (5) are arranged in parallel; one end of the main body (3c) is the shielding end (3b), the other end of the main body (3c) is formed with a protrusion on the rear side, and the other end of the main body (3c) and the protrusion form the connecting end (3a), and the limiting rod (9) is arranged on the rear side of the other end of the main body (3c), and the driving rod (8) is arranged on the connecting end (3a).

7. The collet chuck of claim 4 wherein, The limiting structure includes a stop rod formed on the connecting end (3a) and a stop block formed on the right module (2), and the stop rod can be pressed against the stop block under the action of the torsion spring (7).

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