Electric expansion nail puller for building decoration

Abstract

The utility model relates to the technical field of architectural decoration, and discloses an electric expansion nail puller for architectural decoration, which is characterized in that a servo motor, a fixing device, a sliding device and the like are arranged to realize convenient nail pulling, the device is sleeved outside an expansion nail, a three-jaw chuck is positioned on the outer ring of an expansion nail sleeve, the end part of a screw rod is propped against the end part of a sliding column, and the expansion nail can be pulled out conveniently. A sliding column extrudes a screw rod of an expansion nail inwards until the screw rod touches the bottom wall of a round hole of the wall, a rotating shaft drives sliding blocks to slide towards a sleeve, the multiple sliding blocks are fixed separately, a servo motor is started, the servo motor drives a fixing device to rotate circumferentially and sweep in an overlapped mode at the same time, and the expansion nail is fixed; the sleeve of the expansion nail is clamped by the fixing device to conduct left-right sweeping, the sleeve of the expansion nail is squeezed by the wall back and forth and contracts inwards, the diameter of the portion, located in the wall, of the sleeve is gradually reduced, the sleeve is driven by the fixing device to conduct sweeping and rotating, the portion, located in the wall, of the sleeve is completely pulled out, and the effect that nail pulling is convenient is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of building decoration, in particular to an electric nail puller for expansion nails used in building decoration. Background Technique

[0002] Building decoration is the abbreviation of building decoration and finishing project. Building decoration is a process of various treatments on the inner and outer surfaces and spaces of buildings by using decorative materials or ornaments to protect the main structure of buildings, improve the physical properties, service functions and beautify buildings. At present, during the construction process of building decoration, the use of expansion nails is increasing. After the building decoration is completed or the decoration is demolished, it is often necessary to use a nail puller to pull out the expansion nails driven into the wall.

[0003] In the existing expansion nail pullers, due to the expansion nail screw extruding the sleeve, the sleeve expands outwards and is firmly fixed in the wall. During disassembly, pliers are often used to clamp the screw or the sleeve and pull it outwards. However, often only a part of the expansion nail can be pulled outwards. Subsequently, due to the deformation of the sleeve, the expansion nail cannot be effectively pulled out. Subsequently, the user may carry out violent disassembly, chisel holes in the wall, and cause damage to the wall. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an electric nail puller for expansion nails used in building decoration, which has the advantages of convenient nail pulling and non-damaging nail pulling, and solves the problems raised in the above background technique.

[0005] The utility model provides the following technical scheme: An electric nail puller for expansion nails used in building decoration, including a housing, a servo motor is fixedly installed inside the housing, an inner cavity is opened inside the housing, a fixing device is threadedly sleeved at the opening of the inner cavity inside the housing, a telescopic shaft is movably connected between the fixing device and the outer ring of the output shaft of the servo motor, the telescopic shaft is fixedly sleeved on the outer ring of the output shaft of the servo motor, the end of the telescopic shaft away from the servo motor is fixedly connected to one side of the fixing device, and a sliding device is movably installed inside the fixing device.

[0006] Preferably, a thread groove is opened on the inner ring of the inner cavity, a thread is provided on the outer ring of the fixing device, and the thread groove on the inner ring of the inner cavity is adapted to the thread on the outer ring of the fixing device.

[0007] Preferably, the fixing device includes a three-jaw chuck and an extrusion shell. A working cavity is opened inside the extrusion shell. A round hole is opened between the middle of one side of the three-jaw chuck and the extrusion shell and runs through the three-jaw chuck. A sliding cylinder is fixedly installed on the inner wall of the working cavity. A sliding column is slidably sleeved inside the sliding cylinder. A spring is fixedly connected between the inner wall of the sliding cylinder and the end of the sliding column. The spring is made of a rigid material.

[0008] Preferably, the three-jaw chuck is evenly provided with sliding grooves in a circular ring shape at the outer part of the housing. The sliding device is movably installed inside the sliding grooves. The sliding device includes a slider and a rotating shaft. A gasket is fixedly installed at the bottom of the slider. The gasket is made of rubber material. The rotating shaft is rotatably sleeved inside the fixing device and is adjacent to the slider. A hexagonal hole is provided at the top of the rotating shaft.

[0009] Preferably, a threaded groove is provided on one side of the slider close to the rotating shaft, and threads are provided on the outer circumference of the middle part of the rotating shaft. The threaded groove on one side of the slider is adapted to the threads on the outer circumference of the middle part of the rotating shaft.

[0010] Compared with the prior art, the present utility model has the following beneficial effects:

[0011] 1. For the electric nail puller for expansion nails in building decoration, by setting structures such as a servo motor, a fixing device, and a sliding device, convenient nail pulling is realized. The device is sleeved outside the expansion nail, so that the three-jaw chuck is located on the outer ring of the expansion nail sleeve. The end of the screw rod will abut against the end of the sliding column, and the sliding column will squeeze the screw rod of the expansion nail inward until it touches the bottom wall of the wall round hole. Then the rotating shaft drives the slider to slide towards the sleeve, and multiple sliders are respectively fixed. The servo motor is started. While the servo motor drives the fixing device to perform a circular rotation and superimposed sweeping, the fixing device clamps the sleeve of the expansion nail and performs left and right sweeping, so that the sleeve of the expansion nail is repeatedly squeezed by the wall and contracts inward, and the diameter of the sleeve inside the wall gradually decreases. After the sleeve passes through the sweeping and rotation driven by the fixing device, the sleeve is completely pulled out from inside the wall, and then the expansion nail is taken out without damaging the wall, achieving the effect of facilitating nail pulling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 is a sectional view of the housing structure of the present utility model;

[0014] Figure 3 is a sectional view of the telescopic shaft structure of the present utility model;

[0015] Figure 4 is a sectional view of the fixing device structure of the present utility model;

[0016] Figure 5 is an exploded schematic diagram of the sliding device structure of the present utility model.

[0017] In the figure: 1. Housing; 11. Inner cavity; 2. Servo motor; 21. Telescopic shaft; 3. Fixing device; 31. Three-jaw chuck; 32. Extrusion shell; 33. Sliding cylinder; 34. Sliding column; 35. Spring; 4. Sliding device; 41. Slider; 42. Rotating shaft; 43. Gasket; 44. Hexagonal hole. Detailed implementation mode

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the protection scope of the present utility model.

[0019] Please refer to Figures 1 - 3 , an electric nail puller for building decoration, including a housing 1, a servo motor 2 is fixedly installed inside the housing 1, an inner cavity 11 is opened inside the housing 1, and a fixing device 3 is threadedly sleeved at the opening of the inner cavity 11 inside the housing 1. A telescopic shaft 21 is movably connected between the outer ring of the output shaft of the servo motor 2 and the fixing device 3. The telescopic shaft 21 is fixedly sleeved on the outer ring of the output shaft of the servo motor 2. The end of the telescopic shaft 21 away from the servo motor 2 is fixedly connected to one side of the fixing device 3. The telescopic shaft 21 has three sections and slides into the adjacent section in a progressive manner. Through the sliding and extrusion of the fixing device 3, the other two sections of the telescopic shaft 21 can be completely hidden in the section close to the servo motor 2. A sliding device 4 is movably installed inside the fixing device 3.

[0020] Please refer to Figures 1 - 3 , a thread groove is opened on the inner ring of the inner cavity 11, and a thread is provided on the outer ring of the fixing device 3. The thread groove on the inner ring of the inner cavity 11 is adapted to the thread on the outer ring of the fixing device 3.

[0021] By setting the sending sequence and frequency of the electrical signal for driving the servo motor 2, the rotation direction and swing angle of the driving shaft can be changed. For example, after the servo motor 2 drives the driving shaft to rotate clockwise by 10°, the rotation direction of the driving shaft is changed and then rotates counterclockwise by 8°. In this way, while the driving shaft rotates in one direction, it is superimposed with a sweeping motion in different directions. Through the above description, after clamping the expansion nail sleeve, it shakes to make the diameter of the expansion sleeve gradually shrink under the extrusion of the wall, and the driving shaft rotating in one direction will eventually make the expansion sleeve break away from the restriction of the wall.

[0022] Please refer to Figures 1 - 4, the fixing device 3 includes a three-jaw chuck 31 and an extrusion housing 32. A working chamber is provided inside the extrusion housing 32. A circular hole is provided between the middle of one side of the three-jaw chuck 31 and the extrusion housing 32, and it penetrates through the three-jaw chuck 31. A sliding cylinder 33 is fixedly installed on the inner wall of the working chamber. A sliding column 34 is slidably sleeved inside the sliding cylinder 33. A spring 35 is fixedly connected between the inner wall of the sliding cylinder 33 and the end of the sliding column 34. The spring 35 is made of a rigid material and has a high resilience. When the end of the sliding column 34 contacts the screw of the expansion nail, the sliding column 34 is extruded by the screw, and the sliding column 34 shrinks into the sliding cylinder 33. Due to the high resilience of the spring 35, the screw of the expansion nail will be pushed against the bottom wall of the wall hole. The elastic force of the spring 35 is greater than the frictional force of the expansion nail screw in the wall hole.

[0023] Please refer to Figures 1 - 5 , the three-jaw chuck 31 is evenly provided with sliding grooves in a circular ring shape at the outer part of the housing 1. The sliding device 4 is movably installed inside the sliding grooves. The sliding device 4 includes a slider 41 and a rotating shaft 42. A gasket 43 is fixedly installed at the bottom of the slider 41. The gasket 43 is made of rubber material and is used to increase the frictional force between the slider 41 and the expansion nail, so that the slider 41 firmly clamps the expansion nail. The rotating shaft 42 is rotatably sleeved inside the fixing device 3 and is adjacent to the slider 41. A hexagonal hole 44 is provided at the top of the rotating shaft 42. A hexagonal wrench can be inserted into the hexagonal hole 44 to rotate the rotating shaft 42. A threaded groove is provided on one side of the slider 41 close to the rotating shaft 42. Threads are provided on the outer circumference of the middle part of the rotating shaft 42. The threaded groove on one side of the slider 41 is adapted to the threads on the outer circumference of the middle part of the rotating shaft 42. By rotating the rotating shaft 42, the slider 41 slides up and down inside the sliding groove.

[0024] Working principle: Pull out the expansion nail after disassembly a little bit so that a part of the expansion nail sleeve is exposed. Put the device on the outside of the expansion nail, so that the three-jaw chuck 31 is located on the outer ring of the expansion nail sleeve, and the position of the screw overlaps with the center of the sliding column 34. The end of the screw will push against the end of the sliding column 34, shrinking the sliding column 34 into the sliding cylinder 33. Due to the elastic force of the spring 35, the screw of the expansion nail will be pushed inwards until it touches the bottom wall of the wall circular hole. Insert a hexagonal wrench into the hexagonal hole 44 and rotate the hexagonal wrench to drive the slider 41 to slide towards the sleeve by the rotating shaft 42 to fix the multiple sliders 41 respectively. Start the servo motor 2. The servo motor 2 drives the entire fixing device 3 to rotate by driving the telescopic shaft 21. By setting the angle and amplitude of the rotation of the telescopic shaft 21 driven by the servo motor 2, the servo motor 2 drives the fixing device 3 to perform a circular rotation while superimposing a sweeping motion, so that the fixing device 3 clamps the sleeve of the expansion nail and sweeps left and right, causing the sleeve of the expansion nail to be squeezed by the wall back and forth and shrink inwards, gradually reducing the diameter of the sleeve inside the wall. After the sleeve is swept and rotated by the fixing device 3, the sleeve is completely pulled out from inside the wall, and then the expansion nail can be taken out without damaging the wall.

Claims

1. An electric nail puller for building decoration, comprising a housing (1), characterized in that: A servo motor (2) is fixedly installed inside the housing (1). An inner cavity (11) is formed inside the housing (1). A fixing device (3) is threadedly sleeved at the opening of the inner cavity (11) inside the housing (1). A telescopic shaft (21) is movably connected between the outer ring of the output shaft of the servo motor (2) and the fixing device (3). The telescopic shaft (21) is fixedly sleeved on the outer ring of the output shaft of the servo motor (2). The end of the telescopic shaft (21) away from the servo motor (2) is fixedly connected to one side of the fixing device (3). A sliding device (4) is movably installed inside the fixing device (3).

2. An electric nail puller for expansion nails used in building decoration according to claim 1, characterized in that: Thread grooves are formed on the inner ring of the inner cavity (11). Threads are provided on the outer ring of the fixing device (3). The thread grooves on the inner ring of the inner cavity (11) are adapted to the threads on the outer ring of the fixing device (3).

3. An electric nail puller for building decoration according to claim 2, characterized in that: The fixing device (3) includes a three-jaw chuck (31) and an extrusion shell (32). A working cavity is formed inside the extrusion shell (32). A round hole is formed between the middle of one side of the three-jaw chuck (31) and the extrusion shell (32), and it penetrates through the three-jaw chuck (31). A sliding cylinder (33) is fixedly installed on the inner wall of the working cavity. A sliding column (34) is slidably sleeved inside the sliding cylinder (33). A spring (35) is fixedly connected between the inner wall of the sliding cylinder (33) and the end of the sliding column (34). The spring (35) is made of a rigid material.

4. An electric nail puller for building decoration according to claim 3, characterized in that: The three-jaw chuck (31) is evenly provided with sliding grooves in a circular ring shape at the outer part of the housing (1). The sliding device (4) is movably installed inside the sliding grooves. The sliding device (4) includes a slider (41) and a rotating shaft (42). A gasket (43) is fixedly installed at the bottom of the slider (41). The gasket (43) is made of rubber material. The rotating shaft (42) is rotatably sleeved inside the fixing device (3) and is adjacent to the slider (41). A hexagonal hole (44) is formed at the top of the rotating shaft (42).

5. An electric nail puller for building decoration according to claim 4, characterized in that: A thread groove is formed on one side of the slider (41) close to the rotating shaft (42). Threads are provided on the outer ring of the middle part of the rotating shaft (42). The thread groove on one side of the slider (41) is adapted to the threads on the outer ring of the middle part of the rotating shaft (42).

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