Anti-loosening and retaining mechanism for power tool apron

Abstract

The utility model discloses a power tool apron anti-loose retaining mechanism which comprises a main box body and a shaft sleeve detachably connected with the main box body, the shaft sleeve is perpendicular to the axis of a main shaft, at least one side portion of the main box body is provided with a connecting through hole, and the outer side of the shaft sleeve is provided with a threaded face corresponding to the connecting through hole. A machine-meter screw and a first plastic solid sphere are sequentially arranged in the connecting through hole, the machine-meter screw is connected into the connecting through hole through threads, the front end of the machine-meter screw presses the first plastic solid sphere, and after the first plastic solid sphere is stressed and deformed, the spherical surface of the first plastic solid sphere is in surface contact with the threaded surface of the shaft sleeve. The first plastic solid ball body is stressed and deformed to form surface contact with the threaded surface of the shaft sleeve, so that the friction area is increased, the anti-loosening reliability is improved, the shaft sleeve and the main box body are effectively prevented from rotating relatively, and the anti-loosening and retaining purposes are achieved. Threaded connection of the machine-meter screws allows dynamic adjustment of pressing force on the first plastic solid sphere, and the machine-meter screws adapt to requirements of different working conditions. The phenomenon that the shaft sleeve and the main box body are in spiral connection and are prone to loosening and retreating is thoroughly eradicated, and structural defects are eliminated.

Description

Technical Field

[0001] This utility model relates to the field of power tool holder technology, specifically a power tool holder anti-loosening and anti-retraction mechanism. Background Technology

[0002] Currently, there are two main types of split-type power tool holder structures on the market: the first is a cylindrical fit with end-face screw locking; the second is a cylindrical fit with threaded insertion. The first type is more difficult to machine, requiring very high precision from the machine tool, and is generally produced using multi-axis linkage composite machine tools. Most foreign power tool holder manufacturers currently use this structure. The second type is relatively easier to machine, and the dimensional and geometric tolerances of the parts are easier to guarantee. Most domestic power tool holder manufacturers currently use this structure. However, this structure also has a significant drawback: the threaded insertion is very prone to loosening and disengagement, especially during product use when subjected to torque, vibration, and other factors, making loosening and disengagement highly likely.

[0003] To address this, those skilled in the art have proposed a power tool holder anti-loosening and anti-reverse mechanism. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the spiral connection between the bushing and the main housing is prone to loosening and withdrawal. The purpose of this utility model is to propose a power tool holder anti-loosening and anti-withdrawal mechanism to completely eliminate such phenomenon and eliminate the structural defects of power tool holder products.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A power tool holder anti-loosening and anti-retraction mechanism includes a main housing and a detachable bushing disposed on its lower side. The bushing is perpendicular to the axis of the main shaft. The main housing has a connecting through hole on at least one side. The bushing has a threaded surface on its outer side corresponding to the connecting through hole. A grommet screw and a solid plastic sphere are sequentially disposed in the connecting through hole. The grommet screw is threaded into the connecting through hole and its front end presses against the solid plastic sphere. After the solid plastic sphere is deformed under force, its spherical surface forms a surface contact with the threaded surface of the bushing.

[0007] Furthermore, the main housing has symmetrically arranged connecting through holes on both sides.

[0008] Furthermore, the main housing has two connecting through holes on its side.

[0009] Furthermore, the end of the connecting through hole away from the bushing is provided with a mounting groove, and a solid plastic sphere is provided in the mounting groove.

[0010] Furthermore, the inner diameter of the mounting groove is larger than the inner diameter of the connecting through hole.

[0011] Furthermore, the diameter of the second solid plastic sphere is larger than the inner diameter of the mounting groove, and the second solid plastic sphere is squeezed and deformed into the mounting groove to form a sealing structure.

[0012] Furthermore, both the first and second solid plastic spheres are made of polyoxymethylene (POM) material.

[0013] Compared with existing technologies, this invention offers the following advantages: It provides a power tool holder anti-loosening and anti-reverse mechanism, including a main housing and a bushing detachably connected to it. The bushing is perpendicular to the spindle axis. At least one side of the main housing has a connecting through hole, and the outer side of the bushing has a threaded surface corresponding to the connecting through hole. A grommet screw and a solid plastic sphere are sequentially arranged within the connecting through hole. The grommet screw is threaded into the connecting through hole, and its front end presses against the solid plastic sphere. After the solid plastic sphere deforms under force, its spherical surface forms a surface contact with the threaded surface of the bushing. This surface contact between the deformed solid plastic sphere and the threaded surface of the bushing increases the friction area, improves anti-loosening reliability, and effectively prevents relative rotation between the bushing and the main housing, achieving the purpose of anti-loosening and anti-reverse. The threaded connection of the grommet screw allows for dynamic adjustment of the clamping force on the solid plastic sphere, adapting to different working conditions. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the anti-loosening and anti-retraction mechanism for the power tool holder;

[0015] Figure 2 This is a cross-sectional view of the anti-loosening and anti-retraction mechanism of the power tool holder;

[0016] Figure 3 This is a cross-sectional view of the anti-loosening and anti-retraction mechanism of the power tool holder;

[0017] Figure 4 This is a side view of the anti-loosening and anti-retraction mechanism of the power tool holder.

[0018] Figure 5 This is a structural diagram of the bushing.

[0019] In the diagram: 1. Main housing; 2. Bushing; 3. Spindle; 4. Measuring screw; 5. Solid plastic sphere one; 6. Solid plastic sphere two; 10. Connecting through hole; 20. Threaded surface; 100. Mounting groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 This utility model provides a technical solution: a power tool holder anti-loosening and anti-retraction mechanism, including a main housing 1 and a bushing 2 detachably connected to it. The bushing 2 is perpendicular to the axis of the main shaft 3. The main housing 1 has a connecting through hole 10 on at least one side. The outer side of the bushing 2 has a threaded surface 20 corresponding to the connecting through hole 10. A granulator screw 4 and a solid plastic sphere 5 are sequentially arranged in the connecting through hole 10. The granulator screw 4 is threaded into the connecting through hole 10 and its front end presses against the solid plastic sphere 5. After the solid plastic sphere 5 is deformed under force, its spherical surface forms a surface contact with the threaded surface 20 of the bushing 2. By forming a surface contact between the solid plastic sphere 5 and the threaded surface 20 of the bushing 2 through the deformation of the solid plastic sphere 5, the friction area is increased, the anti-loosening reliability is improved, and the relative rotation between the bushing 2 and the main housing 1 is effectively prevented, thus achieving the purpose of anti-loosening and anti-retraction. The threaded connection of the granulator screw 4 allows for dynamic adjustment of the clamping force on the solid plastic sphere 5 to adapt to different working conditions.

[0022] Please see Figure 2-3 In this embodiment, symmetrical connecting through holes 10 are provided on both sides of the main housing 1. The anti-loosening mechanism arranged symmetrically on both sides forms a bidirectional constraint, which counteracts the torque generated by the vibration of the bushing 2, further improving the purpose of preventing loosening and backlash. Two connecting through holes 10 are provided on the side of the main housing 1. The double through holes on the side of the main housing 1 form two friction surfaces, improving the reliability of anti-loosening and dispersing the contact pressure.

[0023] Please see Figure 2-4 A mounting groove 100 is provided at the end of the connecting through hole 10 away from the bushing 2, and a solid plastic sphere 6 is placed inside the mounting groove 100. The inner diameter of the mounting groove 100 is larger than the inner diameter of the connecting through hole 10 to prevent the solid plastic sphere 6 from moving. The diameter of the solid plastic sphere 6 is larger than the inner diameter of the mounting groove 100. The solid plastic sphere 6 is squeezed and deformed into the mounting groove 100 to form a sealing structure. The interference fit between the mounting groove 100 and the solid plastic sphere 6 forms a physical seal to prevent particulate matter from entering the connecting through hole 10 and causing the nut screw 4 to dislodge and become blocked.

[0024] In this embodiment, the first plastic solid sphere 5 and the second plastic solid sphere 6 are made of polyoxymethylene (POM). POM combines high strength and elasticity, can withstand friction on the threaded surface, and can absorb vibration energy, thus extending its service life.

[0025] Working principle: By screwing in the nut screw 4, the solid plastic sphere 5 made of polyoxymethylene is compressed, causing it to deform and form a large-area contact with the threaded surface 20 of the bushing 2. The elasticity of the material generates continuous frictional resistance, inhibiting the rotation of the bushing 2. The high strength and elasticity of polyoxymethylene can simultaneously absorb vibration energy.

Claims

1. A power tool holder anti-loosening and anti-retraction mechanism, comprising a main housing (1) and a bushing (2) detachably connected thereto, wherein the bushing (2) is perpendicular to the axis of the main shaft (3), characterized in that, The main housing (1) has a connecting through hole (10) on at least one side. The bushing (2) has a threaded surface (20) on the outside corresponding to the connecting through hole (10). A granulator screw (4) and a solid plastic sphere (5) are arranged in sequence in the connecting through hole (10). The granulator screw (4) is threaded into the connecting through hole (10) and its front end presses against the solid plastic sphere (5). After the solid plastic sphere (5) is deformed by force, its spherical surface forms a surface contact with the threaded surface (20) of the bushing (2).

2. The power tool holder anti-loosening and anti-retraction mechanism according to claim 1, characterized in that, The main housing (1) has symmetrical connecting through holes (10) on both sides.

3. The power tool holder anti-loosening and anti-retraction mechanism according to claim 1 or 2, characterized in that, The main housing (1) has two connecting through holes (10) on its side.

4. The power tool holder anti-loosening and anti-retraction mechanism according to claim 1, characterized in that, The end of the connecting through hole (10) away from the bushing (2) is provided with a mounting groove (100), and a solid plastic sphere (6) is provided in the mounting groove (100).

5. The power tool holder anti-loosening and anti-retraction mechanism according to claim 4, characterized in that, The inner diameter of the mounting groove (100) is larger than the inner diameter of the connecting through hole (10).

6. The power tool holder anti-loosening and anti-retraction mechanism according to claim 5, characterized in that, The diameter of the second solid plastic sphere (6) is larger than the inner diameter of the mounting groove (100). The second solid plastic sphere (6) is squeezed and deformed into the mounting groove (100) to form a sealing structure.

7. The power tool holder anti-loosening and anti-retraction mechanism according to claim 1 or 4, characterized in that, The first (5) and the second (6) of the solid plastic spheres are made of polyoxymethylene material.

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