A self-tapping sleeve installation tool

Abstract

The utility model discloses a self -tapping bush mounting tool, including self -tapping bush pole, the fixed connection in the end of self -tapping bush pole's M tooth pole and the positioning sleeve of the sleeve joint in the outside of self -tapping bush pole, still include the automatic feed mechanism of setting between self -tapping bush pole and positioning sleeve. The utility model positioning sleeve can tightly assemble the self -tapping bush on M tooth pole, completes the installation of self -tapping bush, after completing the installation of self -tapping bush, self -tapping bush pole stops rotating, then self -tapping bush pole and positioning sleeve stop relative rotation, and positioning sleeve slides away from M tooth pole's direction under the tensile spring's tensile force effect, make positioning sleeve and self -tapping bush pole separate, avoid M tooth pole from the self -tapping bush and take out the situation of driving it to separate from the parent material, set up as the rotary connection between tensile spring and self -tapping bush pole, make tensile spring can pull positioning sleeve reset, and avoid its influence relative rotation between self -tapping bush pole and positioning sleeve simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of self-tapping screw sleeve technology, and in particular to a self-tapping screw sleeve installation tool. Background Technology

[0002] Self-tapping inserts (also known as self-tapping thread inserts or self-tapping bushings) are fasteners that combine self-tapping capability with thread reinforcement. They are widely used for thread repair and reinforcement in low-strength substrates (such as plastics, aluminum alloys, and cast iron). Self-tapping inserts have threads on both the inner and outer surfaces, and their tail is designed with a cutting groove or round hole. During installation, pre-tapping is not required; they can be directly screwed into a pre-drilled hole. They self-cut into the substrate to form a high-strength internal thread. When embedded in soft materials (such as plastics and aluminum alloys), they significantly improve the wear resistance and tensile strength of the threaded hole, preventing problems such as stripping and disengagement.

[0003] Existing self-tapping insert installation tools suffer from low efficiency, inconvenience, and high cost. When using simple installation tools, an open-end wrench is needed to hold the hexagonal cap after the insert reaches the desired depth before the tool can be removed, hindering quick tool disengagement and resulting in low installation efficiency. Furthermore, the threads at the lower end of the main drive screw are prone to breakage, affecting service life. While anti-lock installation tools can prevent locking to some extent, they rely on elastic components for separation control, which are themselves prone to damage, requiring frequent replacements. This leads to high maintenance costs and short service life, hindering the needs of high-efficiency, large-scale industrial installations.

[0004] A self-tapping screw insert installation tool that is easy to adjust is disclosed in Chinese patent document CN221735349U. This tool includes a connecting rod and a screw insert connecting post. The top end of the screw insert connecting post is sleeved inside the bottom end of the connecting rod, and the connecting rod is provided with a limiting post for fixing the screw insert connecting post. A sleeve is sleeved on the outside of the connection position between the connecting rod and the screw insert connecting post. The screw insert connecting post has vertically distributed limiting structures at positions corresponding to the limiting posts, and the limiting structures are spaced apart. The device is equipped with a partition to prevent the limiting post from moving up and down. The user can adjust the length of the threaded sleeve connecting post extending from the sleeve according to the depth of the installed threaded sleeve position. This facilitates the installation of threaded sleeves at different installation depths. Opening the partition allows the limiting post to move into other limiting structures, thereby preventing the threaded sleeve connecting post from retracting during installation. The support structure prevents the sleeve from sliding up and down. However, this easily adjustable self-tapping threaded sleeve installation tool cannot be quickly disengaged, resulting in low installation efficiency.

[0005] To address the shortcomings of the existing technology, providing a self-tapping screw sleeve installation tool is a problem worthy of research. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of low installation efficiency caused by the inability to quickly detach the tool, and to provide a self-tapping screw sleeve installation tool that achieves the technical effects of convenient operation and strong fastening force.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A self-tapping screw insert installation tool includes a self-tapping screw insert rod, an M-tooth rod fixedly connected to the end of the self-tapping screw insert rod, and a positioning sleeve sleeved on the outside of the self-tapping screw insert rod. It also includes an automatic feeding mechanism disposed between the self-tapping screw insert rod and the positioning sleeve.

[0009] The automatic feeding mechanism includes a positioning pin disposed on the self-tapping sleeve rod, and inclined grooves formed on both sides of the positioning sleeve.

[0010] The length of the positioning pin is adapted to the diameter of the positioning sleeve, and the diameter of the positioning pin is adapted to the width of the inclined groove. The inclined groove is symmetrically opened on both sides of the positioning sleeve and is inclined on the positioning sleeve. By opening the inclined groove on the positioning sleeve and setting the positioning pin in the inclined groove, when the self-tapping screw sleeve rod rotates to install the self-tapping screw sleeve, the positioning pin and the inclined groove move towards the direction close to the M-tooth rod under the action of the inclined surface, so that the positioning sleeve can press against the self-tapping screw sleeve assembled on the M-tooth rod, thus completing the installation of the self-tapping screw sleeve.

[0011] The length and diameter of the locating pin are limited so that it can interact with the inclined groove while preventing the locating pin from protruding from the inclined groove and causing interference with the outside world during rotation.

[0012] The friction coefficient between the positioning pin and the inclined groove is less than 0.5. By limiting the friction coefficient between the positioning pin and the inclined groove, the mutual sliding between the positioning pin and the inclined surface inside the inclined groove is smoother during the interaction process. This allows the positioning sleeve to automatically complete the feeding during the rotation of the self-tapping screw sleeve rod and tighten the self-tapping screw sleeve.

[0013] When the locating pin moves to the end of the inclined groove away from the M-tooth rod, one end of the locating sleeve abuts against the end of the self-tapping screw sleeve on the M-tooth rod.

[0014] The automatic feeding mechanism also includes a tension spring disposed inside the positioning sleeve. One end of the tension spring is rotatably connected to the outer wall of the self-tapping screw sleeve rod, and the other end of the tension spring is fixedly connected to one end of the inner wall of the positioning sleeve. By setting the tension spring between the positioning sleeve and the self-tapping screw sleeve rod, after the installation of the self-tapping screw sleeve is completed, the self-tapping screw sleeve rod stops rotating, and the self-tapping screw sleeve rod and the positioning sleeve stop rotating relative to each other. Under the tension of the tension spring, the positioning sleeve slides away from the M-shaped thread rod, so that the positioning sleeve is separated from the self-tapping screw sleeve rod. This avoids the situation where the M-shaped thread rod is pulled out of the self-tapping screw sleeve and pulled away from the base material. Setting the tension spring and the self-tapping screw sleeve rod as a rotatable connection allows the tension spring to pull the positioning sleeve back to its original position while avoiding affecting the relative rotation between the self-tapping screw sleeve rod and the positioning sleeve.

[0015] The shape of the M-shaped thread rod is adapted to the internal shape of the self-tapping screw sleeve to be installed.

[0016] The self-tapping screw sleeve has an assembly groove at the end away from the M-tooth rod, and the self-tapping screw sleeve is assembled and connected to the output mechanism of the tapping machine through the assembly groove.

[0017] 1. This self-tapping insert installation tool utilizes a locating pin with a slanted groove and a spring structure to effectively prevent the screw from detaching from the base material when removed from the self-tapping insert, ensuring the insert is firmly fixed in the base material and improving installation efficiency. Its reasonable structure and numerous detachable parts facilitate replacement and maintenance, extending overall service life and reducing maintenance and manufacturing costs. This device is particularly suitable for machining internal threads in base materials such as plastics, aluminum alloys, cast iron, and copper. It features convenient operation, strong tightening force, and excellent tensile and anti-loosening properties, making it suitable for widespread industrial application.

[0018] 2. In this self-tapping screw insert installation tool, the positioning pin and the inclined groove move the positioning sleeve towards the M-shaped thread rod under the action of the inclined surface, so that the positioning sleeve can press against the self-tapping screw insert assembled on the M-shaped thread rod, thus completing the installation of the self-tapping screw insert.

[0019] 3. After the self-tapping screw insert installation tool is installed, the self-tapping screw insert rod stops rotating. The self-tapping screw insert rod and the positioning sleeve stop rotating relative to each other. Under the tension of the tension spring, the positioning sleeve slides away from the M-tooth rod, so that the positioning sleeve is separated from the self-tapping screw insert rod, thus preventing the M-tooth rod from being pulled away from the base material when it is removed from the self-tapping screw insert.

[0020] 4. This self-tapping screw sleeve installation tool sets the tension spring and the self-tapping screw sleeve rod as a rotatable connection, so that the tension spring can pull the positioning sleeve to reset while avoiding affecting the relative rotation between the self-tapping screw sleeve rod and the positioning sleeve. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a perspective structural diagram of the positioning sleeve of this utility model;

[0023] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0024] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 5 This utility model Figure 4 A magnified structural diagram at point B in the middle.

[0026] The diagram shows: 1-Self-tapping screw sleeve, 2-M-tooth rod, 3-Positioning sleeve, 4-Automatic feed mechanism, 401-Positioning pin, 402-Slanted groove, 403-Tension spring, 5-Assembly groove. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Example 1

[0028] like Figures 1 to 5 As shown, a self-tapping screw sleeve installation tool includes a self-tapping screw sleeve rod 1, an M-tooth rod 2 fixedly connected to the end of the self-tapping screw sleeve rod 1, and a positioning sleeve 3 sleeved on the outside of the self-tapping screw sleeve rod 1. It also includes an automatic feeding mechanism 4 disposed between the self-tapping screw sleeve rod 1 and the positioning sleeve 3.

[0029] like Figure 1 As shown, the automatic feeding mechanism 4 includes a positioning pin 401 disposed on the self-tapping screw sleeve 1, and inclined grooves 402 formed on both sides of the positioning sleeve 3.

[0030] like Figures 1 to 3As shown, the length of the positioning pin 401 is matched with the diameter of the positioning sleeve 3, and the diameter of the positioning pin 401 is matched with the width of the inclined groove 402. The inclined groove 402 is symmetrically opened on both sides of the positioning sleeve 3 and is inclined on the positioning sleeve 3. By opening the inclined groove 402 on the positioning sleeve 3 and setting the positioning pin 401 in the inclined groove 402, when the self-tapping screw sleeve rod 1 rotates to install the self-tapping screw sleeve, the positioning pin 401 and the inclined groove 402 move the positioning sleeve 3 towards the direction of the M-tooth rod 2 under the action of the inclined surface, so that the positioning sleeve 3 can press against the self-tapping screw sleeve assembled on the M-tooth rod 2, thus completing the installation of the self-tapping screw sleeve.

[0031] The length and diameter of the positioning pin 401 are limited so that it can interact with the inclined groove 402 while preventing the positioning pin 401 from extending out of the inclined groove and causing interference with the outside world during rotation.

[0032] The coefficient of friction between the locating pin 401 and the inclined groove 402 is less than 0.5. By limiting the coefficient of friction between the locating pin 401 and the inclined groove 402, the mutual sliding between the locating pin 401 and the inclined surface inside the inclined groove 402 is smoother during the interaction process. This allows the locating sleeve 3 to automatically complete the feeding during the rotation of the self-tapping screw sleeve rod 1 and tighten the self-tapping screw sleeve.

[0033] like Figures 1 to 5 As shown, when the locating pin 401 moves to the end of the inclined groove 402 away from the M tooth rod 2, one end of the locating sleeve 3 abuts against the end of the self-tapping screw sleeve on the M tooth rod 2. Example 2

[0034] like Figures 2 to 5 As shown, the automatic feeding mechanism 4 also includes a tension spring 403 disposed inside the positioning sleeve 3. One end of the tension spring 403 is rotatably connected to the outer wall of the self-tapping screw sleeve rod 1, and the other end of the tension spring 403 is fixedly connected to one end of the inner wall of the positioning sleeve 3. By setting the tension spring 403 between the positioning sleeve 3 and the self-tapping screw sleeve rod 1, after the installation of the self-tapping screw sleeve is completed, the self-tapping screw sleeve rod 1 stops rotating, and the self-tapping screw sleeve rod 1 and the positioning sleeve 3 stop rotating relative to each other. Under the tension of the tension spring 403, the positioning sleeve 3 slides away from the M-tooth rod 2, so that the positioning sleeve 3 is separated from the self-tapping screw sleeve rod, thus avoiding the situation where the M-tooth rod 2 is pulled away from the base material when it is taken out of the self-tapping screw sleeve. The tension spring 403 and the self-tapping screw sleeve rod 1 are configured to be rotatably connected, so that the tension spring 403 can pull the positioning sleeve 3 to reset while avoiding affecting the relative rotation between the self-tapping screw sleeve rod 1 and the positioning sleeve 3. Example 3

[0035] The shape of M-shaped thread rod 2 is adapted to the internal shape of the self-tapping screw insert to be installed.

[0036] like Figures 1 to 2As shown, the end of the self-tapping screw sleeve 1 away from the M-tooth rod 2 is provided with an assembly groove 5, and the self-tapping screw sleeve 1 is assembled and connected to the output mechanism of the tapping machine through the assembly groove 5.

[0037] The working principle of this utility model is as follows:

[0038] This utility model provides a self-tapping insert installation tool that effectively prevents the screw from detaching from the base material when removed from the self-tapping insert using a locating pin with a slanted groove and a spring structure design. This ensures the self-tapping insert is firmly fixed in the base material, improving installation efficiency. Its reasonable structure and detachable design of many parts facilitate replacement and maintenance, extending the overall service life and reducing maintenance and manufacturing costs. This device is particularly suitable for machining internal threads in base materials such as plastics, aluminum alloys, cast iron, and copper. It features convenient operation, strong fastening force, and excellent tensile and anti-loosening properties, making it suitable for widespread industrial application.

[0039] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A self-tapping screw insert installation tool, comprising a self-tapping screw insert rod (1), an M-tooth rod (2) fixedly connected to the end of the self-tapping screw insert rod (1), and a positioning sleeve (3) sleeved on the outside of the self-tapping screw insert rod (1), characterized in that: It also includes an automatic feeding mechanism (4) disposed between the self-tapping screw sleeve (1) and the positioning sleeve (3).

2. The self-tapping screw sleeve installation tool according to claim 1, characterized in that: The automatic feeding mechanism (4) includes a positioning pin (401) set on the self-tapping screw sleeve (1) and inclined grooves (402) opened on both sides of the positioning sleeve (3).

3. The self-tapping screw sleeve installation tool according to claim 2, characterized in that: The length of the positioning pin (401) is adapted to the diameter of the positioning sleeve (3), the diameter of the positioning pin (401) is adapted to the width of the inclined groove (402), the inclined groove (402) is symmetrically opened on both sides of the positioning sleeve (3), and the inclined groove (402) is inclinedly opened on the positioning sleeve (3).

4. The self-tapping screw sleeve installation tool according to claim 2, characterized in that: The coefficient of friction between the positioning pin (401) and the inclined groove (402) is less than 0.

5.

5. The self-tapping screw sleeve installation tool according to claim 2, characterized in that: When the positioning pin (401) moves to the end of the inclined groove (402) away from the M tooth rod (2), one end of the positioning sleeve (3) abuts against the end of the self-tapping sleeve on the M tooth rod (2).

6. The self-tapping screw sleeve installation tool according to claim 2, characterized in that: The automatic feeding mechanism (4) also includes a tension spring (403) disposed inside the positioning sleeve (3). One end of the tension spring (403) is rotatably connected to the outer wall of the self-tapping screw rod (1), and the other end of the tension spring (403) is fixedly connected to one end of the inner wall of the positioning sleeve (3).

7. The self-tapping screw sleeve installation tool according to claim 1, characterized in that: The shape of the M-tooth rod (2) is adapted to the internal shape of the self-tapping screw sleeve to be installed.

8. The self-tapping screw sleeve installation tool according to claim 1, characterized in that: The self-tapping screw sleeve (1) has an assembly groove (5) at one end away from the M-tooth rod (2), and the self-tapping screw sleeve (1) is assembled and connected to the tapping machine output mechanism through the assembly groove (5).

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