Nail puller for building

Abstract

The nail puller comprises a shell and a clamping and pulling mechanism, the clamping and pulling mechanism comprises a planetary gear assembly, a gear ring shell, a planet carrier, a sun wheel shaft, a motor and a nail hook, a spiral groove is formed in a disc fixed to one end of the planet carrier, one end of the nail hook is hinged to the gear ring shell, and the middle of the nail hook is clamped into the spiral groove; and a guide spiral block outside the gear ring shell is matched with a spiral guide rail inside the shell. Through the motion characteristics of the planetary gear assembly, the planet carrier rotates to drive the nail hook to clamp and loosen, the gear ring shell rotates to drive the clamping and pulling mechanism to move to complete nail pulling and recovery, automatic nail pulling is achieved, manpower is saved, and the field work efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a tool that is convenient for removing nails during construction operations. Background Art

[0002] Publication number CN116713947A provides an electric formwork nail remover for construction, which includes a handle rod, a shell and a conversion mechanism. The upper end of the handle rod is fixed with an electric telescopic rod by bolts, and auxiliary blocks are fixed with bolts in the left and right shell cavities of the shell, and a flip-up blocking claw is movably installed in the groove cavity of the lower block of the auxiliary block. A movable frame is slidably connected to the connection between the shell and the auxiliary block, and a first clamping claw and a second clamping claw are movably installed in the shell cavity at the lower end of the shell from left to right. The conversion mechanism is placed on the lower rod body of the handle rod.

[0003] Although the above-mentioned prior art partially uses some electric components, the process of pulling out nails still mainly relies on manpower to pull them out, which does not reflect the high efficiency and labor-saving nature of the nail pulling tool. Summary of the Invention

[0004] The object of the present invention is to provide a nail remover for construction to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A nail remover for construction, comprising a shell and a clamping and pulling mechanism, the clamping and pulling mechanism comprising a motor, a ring gear shell, a nail hook, a sun gear shaft and a planetary gear assembly, the motor is installed in a linear guide groove inside the shell through a linear guide key of the shell, the outer ring of the ring gear shell is provided with a spiral guide block, wherein the ring gear shell cooperates with the spiral guide rail inside the shell through the spiral guide block of its outer ring, the planetary gear assembly is arranged at the end of the ring gear shell and is connected to the motor through the sun gear shaft, the two nail hooks are hinged on the mounting seat in the ring gear shell, wherein the planet carrier in the planetary gear assembly is fixed with a disc away from the end of the planetary gear assembly, wherein the disc is provided with two symmetrical and symmetrical spiral grooves, and the nail hook fits in the spiral groove.

[0006] Preferably, the planetary gear assembly includes a sun gear, planetary gears and a ring gear, the sun gear shaft is connected to the power output end of the motor, the sun gear is fixed on the sun gear shaft, the planetary gears are rotatably mounted on the shaft of the planetary carrier, the ring gear is fixed on the ring gear housing, and the sun gear, planetary gears and ring gear are on the same plane and meshed.

[0007] Preferably, the bottom of the nail hook has an inclined surface at the nail clamping position, and a semicircular hole is opened on the inclined surface, and the two nail hooks fit in the symmetrical positions of the two spiral grooves.

[0008] Preferably, the mounting seats are symmetrically arranged inside the ring gear housing.

[0009] Preferably, the shell includes a planetary gear movable part, a motor movable part and a handle, the inner wall of the planetary gear movable part is provided with a spiral guide rail, the upper and lower limit positions of the spiral guide rail are limited by limit blocks, the inner wall of the motor movable part is provided with a linear guide groove, the planetary gear movable part and the motor movable part are coaxially fixedly connected and there is a hole between the two for the sun gear shaft to pass through, and the handle is installed at the other end of the motor movable part.

[0010] Compared with the prior art, the beneficial effects of the present invention are: by utilizing the characteristics of the planetary gear assembly, the rotation of the planetary carrier drives the nail hook to clamp the nail, and then the planetary carrier and the ring gear housing are locked, and the relative rotation of the ring gear housing and the housing causes the clamping and pulling mechanism to displace as a whole, so that the clamping and pulling mechanism automatically completes the action of clamping and pulling nails, and no additional action is required by humans, which greatly improves on-site work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0012] Figure 2 It is an axonometric view of the clamping and extracting mechanism of the present invention;

[0013] Figure 3 for Figure 2 sectional view of

[0014] Figure 4 for Figure 3 A view of the part;

[0015] Figure 5 is a three-dimensional schematic diagram of the planet carrier in the present invention;

[0016] Figure 6 This is a front view of the housing in the present invention;

[0017] Figure 7 For the Figure 6 Cross-sectional view along the midline BB;

[0018] Figure 8 It is a three-dimensional schematic diagram of the nail hook of the present invention.

[0019] In the figure: 1 housing, 11 linear guide groove, 12 spiral guide rail, 13 planetary gear movable part, 14 motor movable part, 15 handle, 16 limit block, 2 clamping and extraction mechanism, 21 motor, 211 linear guide key, 22 ring gear housing, 221 spiral guide block, 222 mounting seat, 23 nail hook, 231 inclined surface, 232 semicircular hole, 24 sun gear shaft, 25 planetary gear assembly, 251 sun gear, 252 planetary gear, 253 ring gear, 26 planet carrier, 261 disc, 262 spiral groove. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example:

[0022] See also Figures 1 to 8 , the present invention provides a technical solution:

[0023] A nail remover for construction includes a housing 1 and a clamping and pulling mechanism 2. The clamping and pulling mechanism 2 includes a motor 21, a ring gear housing 22, a nail hook 23, a sun gear shaft 24, and a planetary gear assembly 25. The motor 21 is mounted in a linear guide groove 11 inside the housing 1 through a linear guide key 211 of the housing. The motor 21 can move linearly in the linear guide groove 11 without rotating, and the stroke of the linear guide groove 11 is sufficiently long. The outer ring of the ring gear housing 22 is provided with a left-handed spiral guide block 221, wherein the ring gear housing 22 cooperates with the spiral guide rail 12 inside the housing 1 through the spiral guide block 221 of its outer ring. There are two mutually parallel left-handed spiral guide rails 12 inside the housing 1, and the two guide rails 12 together constitute a spiral guide groove, such as Figure 7 As shown, the spiral guide block 221 is fitted in the spiral guide groove, so that when the ring gear housing 22 rotates relative to the housing 1, the ring gear housing 22 can undergo axial displacement and drive the entire clamping and pulling mechanism 2 to move. The planetary gear assembly 25 is arranged at the end of the ring gear housing 22 and is connected to the motor 21 through the sun gear shaft 24. The sun gear shaft 24 is connected to the motor 21 through a coupling. The sun gear shaft 24 and the ring gear housing 22 are connected through bearings. When the sun gear shaft 24 rotates relative to the ring gear housing 22, no axial movement occurs, and the axial position is relatively fixed. Figure 4 As shown, the two hooks 23 are hinged on the mounting seat 222 in the ring gear housing 22, and a disc 261 is fixed to the end of the planetary carrier 26 in the planetary gear assembly 25 away from the planetary wheel assembly 25, so that the disc 261 can rotate synchronously with the planetary carrier 26, wherein the disc 261 is provided with two symmetrical and symmetrical left-hand spiral grooves 262, and the hooks 23 fit into the spiral grooves 262. The two hooks 23 fit into the two spiral grooves 262 respectively, and the initial state positions of the two hooks 23 in their respective spiral grooves 262 are the same, as shown in FIG. Figure 3 As shown, when the disc 261 rotates, the two nail hooks 23 are driven to move synchronously toward the center and clamp.

[0024] As a preferred embodiment, the spiral guide block 221, the spiral guide rail 12 and the spiral groove 262 are not limited to being left-handed, but may also be in other rotation directions.

[0025] As a preferred embodiment, Figure 4 As shown, the planetary gear assembly 25 includes a sun gear 251, planetary gears 252 and a ring gear 253. The sun gear shaft 24 is connected to the power output end of the motor 21. The sun gear 251 is fixed on the sun gear shaft 24. The sun gear 251 serves as the power source of the entire planetary gear assembly 25. The three planetary gears 252 are respectively mounted on the three shafts of the planetary carrier 26 and each planetary gear 252 is meshed with the sun gear 251 and the ring gear 253. The planetary carrier 26 is limited by the internal block of the ring gear housing 22. When the planetary carrier 26 moves, the planetary carrier 26 will only rotate relative to the ring gear housing 22 without axial movement. The ring gear 253 is fixed on the ring gear housing 22. The sun gear 251, the planetary gears 252 and the ring gear 253 are on the same plane and meshed. The sun gear 251, the planetary gears 252, the ring gear 253, the sun gear shaft 24, the planetary carrier 26 and the ring gear housing 22 constitute a complete planetary gear motion mechanism.

[0026] As a preferred embodiment, the bottom of the nail hook 23 has an inclined surface 231 for inserting into the narrow gap between the nail crown and the board surface, and a semicircular hole 232 is opened on the inclined surface 231 to fix the clamped nail in the center and avoid slipping during the extraction process. Figure 8 As shown, the two nail hooks 23 fit in the symmetrical positions of the two spiral grooves 262 .

[0027] As a preferred embodiment, the mounting seats 222 are symmetrically arranged inside the ring gear housing 22 .

[0028] As a preferred embodiment, the housing 1 includes a planetary gear movable portion 13, a motor movable portion 14 and a handle 15. Figure 7 As shown, the inner wall of the planetary gear movable part 13 is provided with a spiral guide rail 12, and the upper and lower limit positions of the spiral guide rail 12 are limited by limit blocks 16 to avoid the danger caused by the overtravel of the clamping and extracting mechanism 2. The inner wall of the motor movable part 14 is provided with a linear guide groove 11, and the stroke of the linear guide groove 11 is similar to that of the spiral guide rail 12. There is a hole between the planetary gear movable part 13 and the motor movable part 14 for the sun gear shaft 24 to pass through. The handle 15 is installed at the other end of the motor movable part 14 and space is reserved for installing the motor.

[0029] The working principle of the present invention is as follows: First, the nail remover is in the initial state, and the clamping and pulling mechanism 2 is at the leftmost end inside the shell 1. Figure 1 As shown, the two nail hooks 23 are located at the outermost edge of the spiral groove 262 , the center of the housing 1 is aligned with the nail to be pulled out, and the housing 1 is attached to the board surface where the nail is located.

[0030] Then the motor 21 is started to rotate counterclockwise and drives the planetary gear assembly 25 to start moving through the sun gear shaft 24. The sun gear 251 connected to the sun gear shaft 24 starts to rotate counterclockwise, while the housing 1 is stationary. Because the friction between the external spiral guide block 221 of the ring gear housing 22 and the spiral guide rail 12 of the housing 1 is large, the ring gear housing 22 and the ring gear 253 are stationary relative to the housing 1. Therefore, the planet carrier 26 inside the clamping mechanism 2 rotates counterclockwise with the sun gear 251 relative to the ring gear housing 22, and the left-handed spiral groove 262 opened on the disc 261 drives the two nail hooks 23 to approach each other to the center position, clamping and tightening the nail. At this time, the nail hooks 23 will clamp the spiral groove 262 that makes them approach each other, and then clamp the disc 261 and the planet carrier 26, and the planet carrier 26 will no longer rotate relative to the ring gear housing 22.

[0031] Then, when the planet carrier 26 is relatively stationary relative to the ring gear housing 22, the planet gear 252 and the ring gear 253 are also relatively stationary and form a whole. The planet gear 252 no longer rotates, and the sun gear 251 is still rotating counterclockwise, which will drive the ring gear housing 22, the planet carrier 26 and the nail hook 23 to rotate counterclockwise as a whole. Because the left-handed spiral guide block 221 on the outside of the ring gear housing 22 cooperates with the left-handed spiral guide rail 12 inside the housing 1, the ring gear housing 22 rotates and moves away from the board surface, driving the nail hook 23 to pull out the nail. In this process, the rotation of the planet carrier 26 in the ring gear housing 22 is easy to rotate in the housing 1, so the planet carrier 26 will synchronize the ring gear housing 22 to rotate counterclockwise relative to the housing 1, and the planet carrier 26 will not rotate clockwise relative to the ring gear housing 22. The two nail hooks 23 will not move away from each other to loosen the nails. Therefore, there is sufficient clamping force in the whole process to firmly pull the nails out of the board surface.

[0032] Then, the motor only needs to be reversed to release the nail and return the clamping and pulling mechanism to its original state. After the motor rotates clockwise, the ring gear housing 22 is stationary relative to the housing 1, and the planetary carrier 26 rotates clockwise relative to the ring gear housing 22. The nail hooks 23 move away from each other in the clockwise rotating spiral groove 262 and lock the planetary carrier 26 and the ring gear housing 22 after reaching the limit position. Then the planetary carrier 26 and the ring gear housing 22 rotate clockwise relative to the housing 1 as a whole and undergo a displacement opposite to the nail pulling process. After the clamping and pulling mechanism 2 reaches the limit position as a whole, it is in the original state.

[0033] During the entire process, the motor 21 is connected to the sun gear 251 through the sun gear shaft 24. During the axial displacement of the clamping and extracting mechanism 2, the motor 21 also moves synchronously. Because the motor 21 has a linear guide key 211 on the outside and cooperates with the linear guide groove 11 inside the housing 1, the motor 21 can remain stationary during displacement and continuously provide power to the planetary gear assembly 25.

[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A nail remover for construction, comprising a housing (1) and a clamping and extracting mechanism (2), characterized in that: The clamping and extracting mechanism (2) comprises a motor (21), a ring gear housing (22), a nail hook (23), a sun gear shaft (24) and a planetary gear assembly (25); the motor (21) is mounted in a linear guide groove (11) inside the housing (1) through a linear guide key (211) of the housing; the outer ring of the ring gear housing (22) is provided with a spiral guide block (221); the ring gear housing (22) cooperates with the spiral guide rail (12) inside the housing (1) through the spiral guide block (221) of the outer ring of the ring gear housing (22); The gear assembly (25) is arranged at the end of the ring gear housing (22) and is connected to the motor (21) through the sun gear shaft (24). The two hooks (23) are hinged on the mounting seat (222) in the ring gear housing (22). A disc (261) is fixed to the end of the planetary carrier (26) in the planetary gear assembly (25) away from the planetary gear assembly (25). The disc (261) is provided with two symmetrical and symmetrical spiral grooves (262). The hooks (23) fit into the spiral grooves (262).

2. A nail remover for construction according to claim 1, characterized in that: The planetary gear assembly (25) includes a sun gear (251), planetary gears (252) and a ring gear (253); the sun gear shaft (24) is connected to the power output end of the motor (21); the sun gear (251) is fixed on the sun gear shaft (24); the planetary gears (252) are rotatably mounted on the shaft of the planetary carrier (26); the ring gear (253) is fixed on the ring gear housing (22); the sun gear (251) is on the same plane as the planetary gears (252) and the ring gear (253) and is meshed with each other.

3. The nail remover for construction according to claim 1, characterized in that: The bottom of the nail hook (23) has an inclined surface (231) at which the nail is clamped, and a semicircular hole (232) is opened at the inclined surface (231). The two nail hooks (23) are fitted in symmetrical positions of the two spiral grooves (262).

4. The nail remover for construction according to claim 1, characterized in that: The mounting seats (222) are symmetrically arranged inside the ring gear housing (22).

5. The nail remover for construction according to claim 1, characterized in that: The housing (1) comprises a planetary gear movable part (13), a motor movable part (14) and a handle (15); the inner wall of the planetary gear movable part (13) is provided with a spiral guide rail (12); the spiral guide rail (12) has upper and lower limit position limit blocks (16); the inner wall of the motor movable part (14) is provided with a linear guide groove (11); the planetary gear movable part (13) and the motor movable part (14) are coaxially fixedly connected and a hole is provided between the two for the sun gear shaft (24) to pass through; and the handle (15) is mounted on the other end of the motor movable part (14).

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