A tube expanding chuck module structure

Abstract

The utility model provides a kind of expanding die head module structure, belong to electric tool field.It has solved the problem of inconvenient replacement of existing module pressing block.The expanding die head module structure of the utility model includes pressing block and the die holder of strip shape, the die holder middle part has the notched groove of vertical through and with the matching of pressing block, and pressing block is inserted in notched groove, and the positioning hole is vertically penetrated in the bottom wall of notched groove, the positioning rod matched with the positioning hole is inserted in the positioning hole, and the positioning rod one end is fixedly connected with pressing block, the mounting hole is vertically set up on the top wall of die holder, and the mounting hole is communicated with positioning hole;Positioning groove is set up on the side wall of positioning rod, and the pin column that can slide up and down and the spring that makes the lower end of pin column have the tendency of being inserted into positioning groove are vertically arranged in mounting hole, and the upper end of pin column extends mounting hole.The expanding die head module structure of the utility model is beneficial to pressing block replacement.

Description

Technical Field

[0001] This utility model belongs to the field of power tools and relates to a pipe expander chuck, and more particularly to a pipe expander chuck module structure. 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 expander chuck is an important component of the expander. Its structure is as the improved expander chuck previously proposed by the applicant (application number: 202420929072.3), including a left module and a right module. The front ends of the left and right modules are hinged by a vertically set rotating shaft. The left and right modules can be tightly joined to form a clamping hole for clamping the pipe fitting. 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. A positioning boss is formed on the lower side of the left module, which is coaxial with the clamping hole and is in an annular shape. A baffle is horizontally provided 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 opening of the clamping hole. The baffle is made of magnetic material. A magnetic block is fixed on the lower side of the right module, and the magnetic block can be magnetically attracted to the upper side of the rear end of the baffle.

[0004] In the actual product, the module includes a mold base and a pressure block, and the mold base rod is fixed to the pressure block by bolts that pass through the mold base and screw into the pressure block. When replacing the pressure block, a screwdriver is needed to rotate the bolts, which is a cumbersome and inconvenient operation. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a pipe expander clamp module structure that enables rapid assembly and disassembly of the pressure block.

[0006] The objective of this utility model can be achieved through the following technical solution: A pipe expander clamp module structure includes a pressure block and a strip-shaped mold base. The mold base has a vertically penetrating notch that matches the pressure block in the middle, and the pressure block is inserted into the notch. A positioning hole is horizontally penetrating the bottom wall of the notch. A positioning rod that matches the positioning hole is inserted into the positioning hole, and one end of the positioning rod is fixedly connected to the pressure block. The key feature is that an installation hole is vertically opened on the top wall of the mold base, and the installation hole communicates with the positioning hole. A positioning groove is opened on the side wall of the positioning rod. A pin that can slide up and down is vertically arranged in the installation hole, and a spring that makes the lower end of the pin tend to be inserted into the positioning groove. The upper end of the pin extends out of the installation hole.

[0007] When in use, the pin is engaged in the positioning groove by the spring, which restricts the axial movement of the positioning rod and thus locks the pressure block stably in the notch groove. When the pressure block needs to be replaced, hold the upper end of the pin to move it against the spring force so that the lower end of the pin is disengaged from the positioning groove. At this time, the positioning rod is unrestricted, and the pressure block can be easily removed for replacement.

[0008] This application allows the positioning block to be locked or unlocked by manually operating the pin to slide, which has the advantages of being convenient and easy to operate.

[0009] In the above-mentioned pipe expander clamp module structure, the positioning groove is annular and coaxial with the positioning rod, so as to eliminate the requirement for the insertion angle of the positioning rod and facilitate processing and assembly.

[0010] In the aforementioned pipe expander clamp module structure, both the mounting hole and the positioning hole are circular holes. The mounting hole is located on one side of the positioning hole, and the two partially overlap and connect. The positioning groove is positioned directly opposite the overlapping position of the mounting hole and the positioning hole. The lower end of the pin is a cylinder that matches the mounting hole. The diameter of the middle part of the pin is smaller than the diameter of the mounting hole so that the middle part of the pin avoids the positioning rod. The axial cross-section of the positioning groove is an arc shape that matches the cylinder. Under the action of the spring, the pin tends to move upward and cause the cylinder to be inserted into the positioning groove. The process of replacing the positioning block is as follows: Press down on the pin to disengage the cylinder from the positioning groove. The middle part of the pin is positioned directly opposite the positioning groove to form a clearance. At this time, the positioning rod is not restricted, and the positioning block can be easily removed. The entire operation is not only more convenient, but also only requires the insertion of the pin and the spring to achieve the above functions, making the structure extremely simple.

[0011] In the above-mentioned expansion clamp module structure, a limiting structure is provided between the pin and the mold base to limit the downward movement distance of the pin, so as to prevent the pin from being pressed excessively.

[0012] In the above-mentioned expansion clamp module structure, the limiting structure includes an annular shoulder formed on the outer wall of the upper end of the pin. The annular shoulder and the pin are coaxially arranged, and the outer diameter of the annular shoulder is larger than the diameter of the hole on the mounting hole. It has the advantages of simple structure and stable operation.

[0013] As an alternative, in the above-mentioned expansion clamp module structure, the mounting hole is a blind hole, and the limiting structure includes the bottom wall of the pin and the bottom wall of the mounting hole.

[0014] In the above-mentioned expansion clamp module structure, the inner wall of the upper end of the mounting hole is an annular step, the spring is located in the annular step and is sleeved on the pin, and the two ends of the spring are respectively pressed against the bottom surface of the annular step and the annular shoulder.

[0015] In the aforementioned tube expander clamp module structure, a connection hole is provided on the side wall of the positioning block, and one end of the positioning rod is inserted into and fixed in the connection hole.

[0016] In the aforementioned tube expander clamp module structure, the connecting hole is a threaded hole, and one end of the positioning rod is a screw that matches the connecting hole, with the screw threaded into the connecting hole. The positioning rod and the positioning block are connected by threads, which not only facilitates assembly but also makes it easy to adjust the position of the positioning groove, thus simplifying processing and assembly.

[0017] Compared with existing technologies, this pipe expander clamp module structure has the following advantages: 1. The pin automatically moves upward and locks the positioning block under the action of the spring. The positioning block can be unlocked by manually pressing the pin. The whole operation is not only extremely simple, but also does not require any other tools, and has the advantages of convenient and easy operation.

[0018] 2. In this application, only two components, a pin and a spring, are needed to lock or unlock the positioning block, making the structure extremely simple. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the structure of the pipe expander clamp module.

[0020] Figure 2 This is an exploded view of the structure of the pipe expander clamp module.

[0021] Figure 3 This is a cross-sectional view of the structure of the expansion clamp module when the positioning rod is not in the limit position.

[0022] Figure 4 This is a cross-sectional view of the expansion clamp module structure when the positioning rod is in position.

[0023] Figure 5 A three-dimensional schematic diagram of the expansion joint.

[0024] In the diagram, 1 is the pressure block; 2 is the mold base; 2a is the notch groove; 2b is the positioning hole; 2c is the mounting hole; 2d is the annular step; 3 is the positioning rod; 3a is the positioning groove; 3b is the screw; 4 is the pin; 4a is the cylinder; 4b is the annular shoulder; and 5 is the spring. Detailed Implementation

[0025] 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.

[0026] Example 1: As Figure 1 , Figure 2 and Figure 5As shown, the pipe expander clamp module structure includes a pressure block 1 and a strip-shaped mold base 2. The mold base 2 has a vertically penetrating notch 2a in its center, and the notch 2a is located on the inner side of the center of the mold base 2 for the entire pipe expander clamp. The shape and size of the pressure block 1 match the notch 2a, and the pressure block 1 is inserted into the notch 2a. In the actual product, the notch 2a is arc-shaped, and the pressure block 1 is arc-shaped to match the notch 2a.

[0027] like Figures 2 to 4 As shown, a positioning hole 2b is horizontally penetrating the bottom wall of the notch groove 2a, and preferably the positioning hole 2b is located in the middle of the bottom wall of the notch groove 2a. A positioning rod 3 matching the positioning hole 2b is inserted into the positioning hole 2b, and one end of the positioning rod 3 is fixedly connected to the pressure block 1. A mounting hole 2c is vertically provided on the top wall of the mold base 2, and the mounting hole 2c communicates with the positioning hole 2b. A positioning groove 3b is provided on the side wall of the positioning rod 3, and a vertically sliding pin 4 and a spring 5 that tend to engage the lower end of the pin 4 in the positioning groove 3b are vertically provided in the mounting hole 2c, and the upper end of the pin 4 extends out of the mounting hole 2c. Preferably, the positioning groove 3b is annular and coaxial with the positioning rod 3, so as to eliminate the requirement for the insertion angle of the positioning rod 3 and facilitate processing and assembly.

[0028] In use, the pin 4 is engaged in the positioning groove 3b by the action of the spring 5, thereby restricting the axial movement of the positioning rod 3 and thus locking the pressure block 1 stably in the notch groove 2a. When the pressure block 1 needs to be replaced, hold the upper end of the pin 4 to move it against the elastic force of the spring 5 so that the lower end of the pin 4 is disengaged from the positioning groove 3b. At this time, the positioning rod 3 is not restricted, and the pressure block 1 can be easily taken out for replacement.

[0029] This application allows the positioning block to be locked or unlocked by manually operating the pin 4 to slide, which has the advantages of convenient and easy operation.

[0030] In this embodiment, like Figure 3 and Figure 4As shown, both mounting hole 2c and positioning hole 2b are circular holes. Mounting hole 2c is located on one side of positioning hole 2b, and the two partially overlap and connect. Positioning groove 3b is positioned opposite the overlapping position of mounting hole 2c and positioning hole 2b. The lower end of pin 4 is a cylinder 4a that matches mounting hole 2c; the diameter of the middle part of pin 4 is smaller than the diameter of mounting hole 2c so that the middle part of pin 4 avoids positioning rod 3. The axial cross section of positioning groove 3b is an arc shape that matches cylinder 4a. Under the action of spring 5, pin 4 has the tendency to move upward and make cylinder 4a lock into positioning groove 3b. The process of replacing positioning block is as follows: press down pin 4 to make cylinder 4a disengage from positioning groove 3b. The middle part of pin 4 is positioned opposite positioning groove 3b to form a clearance. At this time, positioning rod 3 is not restricted, and positioning block can be easily removed. The whole operation is not only more convenient, but also only requires the insertion of pin 4 and spring 5 to achieve the above functions. The structure is extremely simple. Preferably, mounting hole 2c is a blind hole, that is, the bottom wall of mounting hole 2c is closed.

[0031] To further explain, a limiting structure is provided between the pin 4 and the mold base 2 to limit the downward movement distance of the pin 4, so as to prevent the pin 4 from being excessively pressed. Preferably, the limiting structure includes an annular shoulder 4b formed on the upper outer wall of the pin 4. The annular shoulder 4b and the pin 4 are coaxially arranged, and the outer diameter of the annular shoulder 4b is larger than the diameter of the opening on the mounting hole 2c. This allows the annular shoulder 4b to press against the edge of the opening on the mounting hole 2c to limit the pin 4 from further downward movement, which has the advantages of simple structure and stable operation.

[0032] like Figure 3 As shown, the spring 5 is installed as follows: the inner wall of the upper end of the mounting hole 2c is an annular step 2d, the spring 5 is in the annular step 2d and is sleeved on the pin 4, and the two ends of the spring 5 are respectively pressed against the bottom surface of the annular step 2d and the annular shoulder 4b.

[0033] The positioning rod 3 and the positioning block are connected as follows: a connecting hole is provided on the side wall of the positioning block, and one end of the positioning rod 3 is inserted into and fixed in the connecting hole. Further, the connecting hole is a threaded hole, and one end of the positioning rod 3 is a screw that matches the connecting hole, with the screw threaded into the connecting hole. The threaded connection between the positioning rod 3 and the positioning block not only facilitates assembly but also allows for easy adjustment of the position of the positioning groove 3b, simplifying processing and assembly.

[0034] 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 the bottom wall of pin 4 and the bottom wall of mounting hole 2c.

[0035] Example 3: The structure and principle of Example 2 are basically the same as those of Example 1, except that: the mounting hole 2c is a through hole, the mounting hole 2c is directly above the positioning hole 2b, and the lower end of the mounting hole 2c is connected to the positioning hole 2b; a bracket is fixed inside the mounting hole 2c, the pin 4 is slidably mounted on the bracket, and a ring-shaped drive seat is formed on the lower outer wall of the pin 4. The upper and lower ends of the spring 5 act on the bracket and the drive seat respectively, so that the pin 4 has a downward tendency. At this time, pulling the pin 4 up causes the lower end of the pin 4 to disengage from the positioning groove 3b.

[0036] 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 clamp module structure, comprising a pressure block (1) and a strip-shaped mold base (2), wherein the mold base (2) has a vertically penetrating notch (2a) that matches the pressure block (1) in the middle, and the pressure block (1) is inserted into the notch (2a), and a positioning hole (2b) is horizontally penetrating the bottom wall of the notch (2a), and a positioning rod (3) that matches the positioning hole (2b) is inserted into the positioning hole (2b), and one end of the positioning rod (3) is fixedly connected to the pressure block (1), characterized in that, The top wall of the mold base (2) is vertically provided with an installation hole (2c), and the installation hole (2c) is connected to the positioning hole (2b); the side wall of the positioning rod (3) is provided with a positioning groove (3a), and a pin (4) that can slide up and down is vertically provided in the installation hole (2c) and a spring (5) that makes the lower end of the pin (4) tend to be inserted into the positioning groove (3a), and the upper end of the pin (4) extends out of the installation hole (2c).

2. The pipe expander clamp module structure according to claim 1, characterized in that, The positioning groove (3a) is annular and coaxial with the positioning rod (3).

3. The pipe expander clamp module structure according to claim 2, characterized in that, The mounting hole (2c) and positioning hole (2b) mentioned above are both round holes. The mounting hole (2c) is located on one side of the positioning hole (2b) and the two partially overlap and are connected. The positioning groove (3a) is set at the overlapping position of the mounting hole (2c) and the positioning hole (2b). The lower end of the pin (4) is a cylinder (4a) that matches the mounting hole (2c). The diameter of the middle part of the pin (4) is smaller than the diameter of the mounting hole (2c) so that the middle part of the pin (4) avoids the positioning rod (3). The axial cross section of the positioning groove (3a) is an arc shape that matches the cylinder (4a). Under the action of the spring (5), the pin (4) has the tendency to move upward and make the cylinder (4a) fit into the positioning groove (3a).

4. The pipe expander clamp module structure according to claim 3, characterized in that, A limiting structure is provided between the pin (4) and the mold base (2) to limit the downward movement distance of the pin (4).

5. The pipe expander clamp module structure according to claim 4, characterized in that, The limiting structure includes an annular shoulder (4b) formed on the outer wall of the upper end of the pin (4). The annular shoulder (4b) and the pin (4) are coaxially arranged, and the outer diameter of the annular shoulder (4b) is larger than the diameter of the hole on the mounting hole (2c).

6. The pipe expander clamp module structure according to claim 5, characterized in that, The upper inner wall of the mounting hole (2c) is an annular step (2d). The spring (5) is located in the annular step (2d) and is sleeved on the pin (4). The two ends of the spring (5) press against the bottom surface of the annular step (2d) and the annular shoulder (4b) respectively.

7. The pipe expander clamp module structure according to claim 1, characterized in that, A connecting hole is provided on the side wall of the positioning block, and one end of the positioning rod (3) is inserted into and fixed in the connecting hole.

8. The pipe expander clamp module structure according to claim 7, characterized in that, The type of connecting hole is a threaded hole. One end of the positioning rod (3) is a screw (3b) that matches the connecting hole, and the screw (3b) is threaded into the connecting hole.

9. The pipe expander clamp module structure according to claim 4, characterized in that, The mounting hole (2c) is a blind hole, and the limiting structure includes the bottom wall of the pin (4) and the bottom wall of the mounting hole (2c).

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