A handheld electric thread repair device

Abstract

The present invention discloses a handheld electric thread repair device, comprising: an inner sleeve, an outer sleeve, a circular die and an electric torque wrench; the inner sleeve is connected to the lower end of the main shaft of the electric torque wrench; the outer sleeve is movably connected to the outer periphery of the inner sleeve and is fixedly connected to the outer shell of the electric torque wrench; the circular die is fixedly connected to the mounting hole at the lower end of the inner sleeve; the device can work continuously for a long time like a machine tool, is easy to carry, simple to operate, is suitable for repairing external threads of various specifications, improves efficiency and reduces construction costs.

Description

Technical Field

[0001] The invention belongs to the technical field of repair tools, and in particular relates to a handheld electric thread repair device. Background Art

[0002] Threaded connection is a widely used connection form. During the installation and use process, the internal or external threads are often damaged, resulting in the inability of threaded fasteners to connect normally. In general, the damaged threaded fasteners are replaced to ensure the quality of the connection. However, in many cases, it is impossible to replace the damaged threaded fasteners. In this case, it is necessary to use equipment or manual methods to repair the damaged threads. When using lathes and other equipment to repair removable screws and nuts, the operation is simple and the processing efficiency is high. However, for external threads that have been fixed and cannot be removed, such as embedded screws, they are affected by environmental and working conditions and cannot be repaired using lathes and other equipment.

[0003] At present, manual repair is usually used for fixed external threads. When the number of repairs is small, the cost is low and the operation is convenient. However, when the number of repairs is large, the efficiency of manual repair is low, especially when repairing threads with specifications above M24, manual operation is difficult. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a handheld electric thread repair device. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0005] A handheld electric thread repair device comprises: an inner sleeve, an outer sleeve, a circular die and an electric torque wrench; the inner sleeve is connected to the lower end of the main shaft of the electric torque wrench; the outer sleeve is movably connected to the outer periphery of the inner sleeve and fixedly connected to the outer shell of the electric torque wrench; the circular die is fixedly connected to the mounting hole at the lower end of the inner sleeve.

[0006] Furthermore, it also includes a self-lubricating sleeve, which is arranged between the outer sleeve and the inner sleeve and fixed on the inner wall of the outer sleeve.

[0007] Furthermore, a spline is provided at the upper end of the inner sleeve, and the spline is connected to the mounting port of the electric torque wrench spindle; a first threaded hole is provided on the side wall of the mounting hole at the lower end of the inner sleeve, and a first set screw is installed on the first threaded hole and fixedly connected to the circular die.

[0008] Furthermore, a fixing bayonet and a first connecting groove are provided at the upper end of the outer sleeve, the fixing bayonet is fixed to the first boss on the outer shell of the electric torque wrench, and the first connecting groove is fixedly connected to the screw on the outer shell of the electric torque wrench.

[0009] Furthermore, a second connecting groove is provided on the inner sleeve below the spline, a second threaded hole is provided on the outer sleeve below the fixing bayonet, a second set screw is installed on the second threaded hole and is located in the second connecting groove, and there is a gap between the second set screw and the second connecting groove.

[0010] Furthermore, a fixing rod is provided on one side of the outer jacket.

[0011] Beneficial effects of the present invention:

[0012] 1. The device can work continuously for a long time, is easy to carry, simple to operate, and is suitable for repairing external threads of various specifications, improving efficiency while reducing construction costs;

[0013] 2. Using this device to clean and repair threads is more convenient than using a fixed machine tool, and can adapt to more construction conditions;

[0014] 3. Compared with manual repair methods, it can better adapt to the cleaning and repair of large-volume and large-diameter screw threads.

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the installation structure of the inner sleeve and the outer sleeve;

[0017] Figure 2 It is a schematic cross-sectional view of the installation structure of the inner sleeve and the outer sleeve;

[0018] Figure 3 for Figure 2 Schematic diagram of the main structure;

[0019] Figure 4 Schematic diagram of the thread repair process.

[0020] Description of reference numerals:

[0021] 1-inner sleeve; 2-outer sleeve; 3-round die; 4-electric torque wrench; 5-self-lubricating sleeve; 6-embedded screw; 1-1-first set screw; 1-2-second connecting groove; 1-3-second boss; 2-1-fixing bayonet; 2-2-first connecting groove; 2-3-second set screw; 2-4-fixing rod; 4-1-first boss; 4-2-connecting screw. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0023] See also Figure 1 to Figure 4An embodiment of the present invention provides a handheld electric thread repair device, which specifically includes: an inner sleeve 1, an outer sleeve 2, a circular die 3 and an electric torque wrench 4; the inner sleeve 1 is connected to the lower end of the main shaft of the electric torque wrench 4, and the upper end of the inner sleeve 1 is designed as a spline according to the connection form of the installation port of the electric torque wrench 4. The spline is inserted into the installation port of the electric torque wrench 4 to fix the inner sleeve 1 and the electric torque wrench 4. The electric torque wrench 4 can drive the inner sleeve 1 to rotate when in use.

[0024] The outer sleeve 2 is movably connected to the outer periphery of the inner sleeve 1 and fixedly connected to the outer shell of the electric torque wrench 4. A fixing bayonet 2-1 and a first connecting groove 2-2 are provided at the upper end of the outer sleeve 2. The fixing bayonet 2-1 is fixed to the first boss 4-1 on the outer shell of the electric torque wrench 4, and the first connecting groove 2-2 is fixedly connected to the connecting screw 4-2 on the outer shell of the electric torque wrench 4, thereby preventing the electric torque wrench 4 from falling off from the outer sleeve 2.

[0025] The circular die 3 is fixedly connected to the mounting hole at the lower end of the inner sleeve 1. A first threaded hole is provided on the side wall of the mounting hole at the lower end of the inner sleeve 1. The first set screw 1-1 is installed on the first threaded hole and fixedly connected to the circular die 3. The circular die 3 matches the specifications of the thread to be repaired; the screw head of the first set screw 1-1 is located in the inner sleeve 1.

[0026] A second connecting groove 1-2 is provided on the inner sleeve 1 below the spline; a second threaded hole is provided on the outer sleeve 2 below the fixing bayonet 2-1, and a second set screw 2-3 is installed on the second threaded hole and is located in the second connecting groove 1-2. There is a gap between the second set screw 2-3 and the second connecting groove 1-2, thereby realizing the connection between the inner sleeve 1 and the outer sleeve 2 without restricting the rotation of the inner sleeve 1.

[0027] The device also includes a self-lubricating sleeve 5, which is fixed between the outer sleeve 2 and the inner sleeve 1 and fixed on the inner wall of the outer sleeve 2. The self-lubricating sleeve 5 has an interference fit with the outer sleeve 2 and a clearance fit with the inner sleeve 1. A second boss 1-3 is provided on the outer side of the lower end of the inner sleeve 1 to prevent the self-lubricating sleeve 5 from falling off from between the outer sleeve 2 and the inner sleeve 1. The self-lubricating sleeve 5 allows the inner sleeve 1 to rotate flexibly when in use.

[0028] Furthermore, a fixing rod 2-4 is provided on one side of the outer sleeve 2, and the fixing rod 2-4 can act as a reaction arm when the entire device is in use, thereby smoothly performing thread repair.

[0029] The installation process of this device is as follows: select a suitable circular die 3, and fix the circular die 3 in the mounting hole at the lower end of the inner sleeve 1, then install the inner sleeve 1 with the circular die 3 into the outer sleeve 2, and connect the inner sleeve 1 and the outer sleeve 2 together by tightening the second fixing screws 2-3 on the side of the outer sleeve 2, and finally install and connect the assembly formed by the inner sleeve 1 and the outer sleeve 2 with the electric torque wrench 4.

[0030] The use of this device:

[0031] When using a handheld electric thread repair device for thread repair, the circular die 3 is placed on the threaded end of the embedded screw 6, and the reaction arm of the outer sleeve 2 is supported at an appropriate support point to ensure that the entire device coincides with the axis of the embedded screw 6. Then, after turning on the power switch of the electric torque wrench 4, the thread repair device can repair the damaged thread along the direction of the embedded screw 6. After the thread repair is completed, reverse the electric torque wrench 4 to completely withdraw the entire device from the embedded screw 6.

[0032] When the circular die 3 needs to be replaced, first loosen the connecting screws of the outer shell of the electric torque wrench 4 to remove the assembly of the inner sleeve 1 and the outer sleeve 2, then loosen the first fixing screws 1-1 in turn, replace the new circular die 3 and reassemble the thread repair device.

[0033] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0034] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A handheld electric thread repair device, characterized in that: include: Inner sleeve, outer sleeve, round die and electric torque wrench; The inner sleeve is connected to the lower end of the main shaft of the electric torque wrench; the outer sleeve is movably connected to the outer periphery of the inner sleeve and fixedly connected to the outer shell of the electric torque wrench; the circular die is fixedly connected to the mounting hole at the lower end of the inner sleeve; The upper end of the inner sleeve is provided with a spline, and the spline is connected to the mounting port of the main shaft of the electric torque wrench; the side wall of the mounting hole at the lower end of the inner sleeve is provided with a first threaded hole, and the first set screw is installed on the first threaded hole and fixedly connected to the circular die; The upper end of the outer sleeve is provided with a fixing bayonet and a first connecting groove, the fixing bayonet is fixed to the first boss on the housing of the electric torque wrench, and the first connecting groove is fixedly connected to the screw on the housing of the electric torque wrench; A second connecting groove is formed on the inner sleeve below the spline, a second threaded hole is formed on the outer sleeve below the fixed bayonet, a second set screw is installed on the second threaded hole and is located in the second connecting groove, and a gap exists between the second set screw and the second connecting groove; The repair device also includes a self-lubricating sleeve, which is arranged between the outer sleeve and the inner sleeve and fixed on the inner wall of the outer sleeve.

2. The handheld electric thread repair device according to claim 1, characterized in that: A fixing rod is arranged on one side of the outer jacket.

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