Electric screw turning tool

Abstract

The utility model relates to an electric screw turning tool which comprises a handle portion. A cover body is mounted on the handle part; a sleeve is arranged below the handle part; a movable block is arranged in the sleeve; a sliding assembly for driving the movable block to move is arranged on the sleeve; a motor is fixed to the top face of an inner cavity of the cover body through bolts. A connecting shaft is fixed to the output end of the motor. A clamping block is fixed on the lower surface of the connecting shaft; three screwdriver heads distributed at equal intervals are arranged in the movable block through bearings. According to the electric screw turning tool, by arranging the sliding assembly and the limiting assembly, bits of different specifications can be rapidly replaced, so that the tool is matched with different bolts, the purpose of tightening screws is achieved, the application range of the screw tool is widened, meanwhile, the time spent on replacing the bits of different specifications is greatly shortened, and the working efficiency is improved. And the working efficiency of operators is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to an electric screw-tightening tool. Background Art

[0002] An electric screwdriver, also known as an electric screwdriver or electric driver, is an electric tool used to tighten and loosen screws. It is equipped with a mechanism to adjust and limit torque. It is mainly used in assembly lines and is one of the essential tools for most manufacturing companies. It is divided into home and professional use according to needs. Most electric screwdrivers are designed for professionals. When purchasing, you should distinguish between professional and general home electric screwdrivers.

[0003] For example, a Chinese utility model patent (publication number: CN213731461U) discloses an electric screwdriver, whose technical solution is as follows: it includes: a body; a motor, which is arranged in the body; a tool head mounting seat, which is arranged at the top of the body, one end of which is connected to the output shaft of the motor, and the other end of which is used to mount the tool head of the screwdriver; a key module, which is arranged on the surface of the body and is used to control the operation of the motor; a control circuit board, which is arranged in the body and is respectively connected to the motor and the key module, and the key module controls the switch and speed of the motor through the control circuit board; a power module, which is connected to the control circuit board and the motor.

[0004] The applicant has found through searching that there are still some problems in the above technical solutions that need to be improved. For example, when using tools to tighten screws, because there are many types of screws, it is necessary to use a screwdriver bit that is compatible with the screws to tighten them. When replacing the screwdriver bit, because the screwdriver bit is often disassembled and assembled, it may cause thread slippage at the connection between the screwdriver bit and the tightening tool. Frequent replacement of the screwdriver bit wastes time, resulting in slow efficiency in tightening the screws. For this reason, we propose an electric screw-tightening tool to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an electric screwdriver tool, which has the advantage of being able to quickly replace the bit, thereby solving the problem of the bit not being suitable for the screw and thus requiring the bit to be replaced, resulting in a waste of time.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric screw-tightening tool, comprising a handle portion;

[0007] A cover body is installed on the handle portion;

[0008] A sleeve is provided below the handle portion;

[0009] A movable block is provided in the sleeve;

[0010] The sleeve is provided with a sliding assembly for driving the movable block to move;

[0011] A motor is fixed to the top surface of the inner cavity of the cover body by bolts;

[0012] A connecting shaft is fixed to the output end of the motor;

[0013] The top surface of the cover body is provided with cables;

[0014] A clamping block is fixed on the lower surface of the connecting shaft;

[0015] Three screwdriver bits are arranged in the movable block via bearings and are distributed at equal distances;

[0016] Three groups of limit holes are provided at both left and right ends of the movable block, and the three groups of limit holes correspond to the three screwdriver bits respectively;

[0017] A limiting assembly for limiting the position of the movable block is provided in the sleeve;

[0018] The sleeve is provided with two left and right mounting holes inside;

[0019] The ends of the two mounting holes facing away from each other are also connected with a through hole;

[0020] The opposite ends of the two mounting holes are connected with a plug hole.

[0021] Furthermore, the three screwdriver bits are respectively a cross screwdriver bit, a flat screwdriver bit and a Pozidriv screwdriver bit, and the upper surface of each screwdriver bit is provided with a clamping hole adapted to the shape of a clamping block, and the cross-section of the clamping block is triangular.

[0022] Furthermore, two control switches are provided on the outer surface of the handle portion, and the two control switches respectively control the forward rotation and reverse rotation of the motor, and the two control switches are electrically connected to the motor.

[0023] Furthermore, the sliding assembly includes sliding blocks fixed at the left and right ends of the movable block, and the sliding assembly also includes two sliding holes opened in the sleeve, and the two sliding blocks are respectively located inside the two sliding holes and are slidably connected thereto.

[0024] Furthermore, the limit assembly includes two left and right groups of limit rods, retaining rings, springs and pull rings. The two limit rods respectively pass through the through holes and extend to two sockets. The retaining ring is fixed to the outer surface of one end of the limit rod located in the mounting hole. The opposite ends of the two springs are fixed to the ends opposite to the two retaining rings, and the two pull rings are fixed to the ends opposite to the two limit rods.

[0025] Furthermore, the spring is sleeved with the limiting rod, and the opposite ends of the two springs are respectively fixed to the opposite ends of the inner cavities of the two mounting holes.

[0026] Furthermore, opposite ends of the two limiting rods are respectively located inside a single group of limiting holes.

[0027] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0028] The electric screw-tightening tool can quickly replace screw bits of different specifications by setting a sliding component and a limit component, so as to adapt to different bolts and achieve the purpose of tightening the screws, thereby improving the applicable scenarios of the screw tool, and also greatly reducing the time required for replacing screw bits of different specifications, thereby improving the operating efficiency of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0030] Figure 2 This is a schematic diagram of the internal planar structure of the cover body of the utility model;

[0031] Figure 3 This is a schematic diagram of the connection structure of the connecting shaft, the clamping block and the screwdriver bit of the utility model;

[0032] Figure 4 It is a structural schematic diagram of the sliding assembly of the utility model;

[0033] Figure 5 It is a structural schematic diagram of the limiting hole of the utility model;

[0034] Figure 6 It is a cross-sectional view of the sleeve of the utility model;

[0035] Figure 7 It is a schematic diagram of the enlarged structure of point A of the utility model.

[0036] In the figure: 1. handle; 2. cover; 3. sleeve; 4. movable block; 5. motor; 6. connecting shaft; 7. clamping block; 8. slider; 9. screwdriver bit; 10. limiting hole; 11. limiting rod; 12. retaining ring; 13. spring; 14. pull ring; 15. cable. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] See also Figure 1-4, an electric screw-tightening tool in this embodiment comprises a handle portion 1; two control switches are also provided on the outer surface of the handle portion 1, and a cover body 2 is installed on the handle portion 1; a sleeve 3 is provided below the handle portion 1; a movable block 4 is provided in the sleeve 3; a sliding assembly for driving the movable block 4 to move is provided on the sleeve 3; a motor 5 is fixed to the top surface of the inner cavity of the cover body 2 by bolts, and a cable 15 is arranged on the top surface of the cover body 2. The two control switches respectively control the forward rotation and reverse rotation of the motor 5, and the two control switches are electrically connected to the motor 5; a connecting shaft 6 is fixed to the output end of the motor 5; a clamping block 7 is fixed to the lower surface of the connecting shaft 6, and the cross-section of the clamping block 7 is triangular; three screwdriver bits 9 distributed equidistantly are provided in the movable block 4 through a bearing, and the three screwdriver bits 9 are respectively a cross screwdriver bit, a flat screwdriver bit and a pound screwdriver bit, and each screwdriver bit 9 has a clamping hole on the upper surface that matches the shape of the clamping block 7.

[0039] In this embodiment, by providing a sliding component, the clamping block 7 can be connected to different types of screw bits 9, so as to tighten different types of screws; and by providing a fixing component, the adjusted movable block 4 can be fixed.

[0040] See also Figure 5-7 In order to drive the movable block 4 to move in the sleeve 3, the movable block 4 in this embodiment is provided with limit holes 10 at both ends, and each group corresponds to each screw head 9; a limit assembly for limiting the movable block 4 is provided in the sleeve 3; two left and right mounting holes are provided inside the sleeve 3; the ends opposite to each other of the two mounting holes are also connected with a through hole; the ends opposite to each other of the two mounting holes are connected with a plug hole; the sliding assembly includes sliders 8 fixed at the left and right ends of the movable block 4, and the sliding assembly also includes two sliding holes provided in the sleeve 3, and the two sliders 8 are respectively located inside the two sliding holes and are slidably connected with them.

[0041] In this embodiment, by stopping the limiting of the movable block 4 and further moving the slider 8 in the sliding hole, the clamping block 7 can clamp different types of screw bits 9, thereby adapting to different types of screws, and the type of the screw bit 9 can be quickly changed.

[0042] It should be noted that when the clamping block 7 needs to be clamped in the clamping hole opened on different screw bits 9, first hold the handle part 1, and then rotate the sleeve 3 to drive the sleeve 3 to rotate through the threaded groove on its outer surface, thereby driving the sleeve 3 to move downward, so that the clamping block 7 is no longer clamped in the clamping hole; after further adjusting to the screw bit 9 that matches the screw, reverse the sleeve 3 to make the clamping block 7 clamped in the clamping hole.

[0043] See also Figure 6-7In order to stop the limiting of the movable block 4, in this embodiment: the limiting assembly includes two left and right groups of limiting rods 11, a retaining ring 12, a spring 13 and a pull ring 14, the spring 13 is sleeved with the limiting rod 11, and the opposite ends of the two springs 13 are respectively fixed at the opposite ends of the inner cavities of the two mounting holes, the two limiting rods 11 respectively penetrate the through holes and extend to the two plug holes, the retaining ring 12 is fixed to the outer surface of the end of the limiting rod 11 located in the mounting hole, the opposite ends of the two springs 13 are fixed to the opposite ends of the two retaining rings 12, the two pull rings 14 are fixed to the opposite ends of the two limiting rods 11, and the opposite ends of the two limiting rods 11 are respectively located inside the single group of limiting holes 10.

[0044] In this embodiment, by pulling the pull ring 14 toward the opposite end, the two pull rings 14 drive the two limiting rods 11 to move out of the limiting holes provided on the movable block 4, thereby achieving the purpose of stopping limiting the movable block 4.

[0045] The working principle of the above embodiment is:

[0046] When the screw needs to be tightened, first insert the screw into the middle position of the three screw bits 9. When the model of the screw bit 9 does not match the screw, first rotate the sleeve 3 to rotate the spiral portion on the outer surface of the sleeve 3, so as to screw out the sleeve 3. When the sleeve 3 is screwed out, the block 7 will be driven to move out of the triangular hole provided in the screw bit 9, and further pull the two pull rings 14 toward the opposite ends. When the two pull rings 14 move toward the opposite ends, the limiting rod 11 fixed with the pull ring 14 will be driven to move toward the opposite ends. When the two limiting rods 11 move toward the opposite ends, the retaining ring 12 on the outer surface of the limiting rod 11 will be driven to squeeze the spring 13, so that the spring 13 is compressed to produce deformation and store energy, and further slides. The movable block 4 causes the slider 8 to move in the sliding hole provided on the sleeve 3, and further under the elastic action of the spring 13, the two limiting rods 11 will be driven to move to the opposite end. After moving to the appropriate position, the two limiting rods 11 will be inserted into another limiting hole 10, so as to achieve the purpose of limiting the movable block 4. Further, by rotating the sleeve 3, the sleeve 3 is screwed into the handle part 1 through the spiral part provided on its outer surface, and the clamping block 7 is further inserted into the clamping hole provided on the screw head 9, so as to achieve the purpose of replacing the screw head 9. In this way, the screw head 9 can be changed without disassembling it, which improves the operating efficiency of the operator. At the same time, by installing the three screw heads 9 on the movable block 4, the problem of losing the screw head 9 is avoided.

[0047] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric screw tightening tool, characterized in that: comprising a handle portion (1); A cover body (2) is mounted on the handle portion (1); A sleeve (3) is provided below the handle portion (1); A movable block (4) is provided inside the sleeve (3); The sleeve (3) is provided with a sliding component for driving the movable block (4) to move; A motor (5) is fixed to the top surface of the inner cavity of the cover body (2) via bolts; The top surface of the cover body (2) is provided with cables (15); A connecting shaft (6) is fixed to the output end of the motor (5); A clamping block (7) is fixed on the lower surface of the connecting shaft (6); Three screwdriver bits (9) are arranged in the movable block (4) via bearings and are equidistantly distributed. The movable block (4) is provided with three groups of limit holes (10) at both left and right ends, and the three groups of limit holes correspond to the three screwdriver bits (9) respectively; The sleeve (3) is provided with a limiting component for limiting the position of the movable block (4); The sleeve (3) is provided with two left and right mounting holes inside; The ends of the two mounting holes facing away from each other are also connected with a through hole; The opposite ends of the two mounting holes are connected with a plug hole.

2. The electric screw tightening tool according to claim 1, characterized in that: The three screwdriver bits (9) are respectively a cross screwdriver bit, a flat screwdriver bit and a Pozidriv screwdriver bit. The upper surface of each screwdriver bit (9) is provided with a clamping hole that matches the shape of the clamping block (7). The cross section of the clamping block (7) is triangular.

3. The electric screw tightening tool according to claim 1, characterized in that: Two control switches are also provided on the outer surface of the handle portion (1), the two control switches respectively controlling the forward rotation and reverse rotation of the motor (5), and the two control switches are both electrically connected to the motor (5).

4. The electric screw tightening tool according to claim 1, characterized in that: The sliding assembly comprises sliding blocks (8) fixed at the left and right ends of the movable block (4), and the sliding assembly also comprises two sliding holes opened in the sleeve (3), and the two sliding blocks (8) are respectively located inside the two sliding holes and are slidably connected thereto.

5. The electric screw tightening tool according to claim 1, characterized in that: The limiting assembly comprises two left and right groups of limiting rods (11), a retaining ring (12), a spring (13) and a pull ring (14); the two limiting rods (11) respectively penetrate through holes and extend to two insertion holes; the retaining ring (12) is fixed to the outer surface of one end of the limiting rod (11) located in the mounting hole; the opposite ends of the two springs (13) are fixed to the opposite ends of the two retaining rings (12); and the two pull rings (14) are fixed to the opposite ends of the two limiting rods (11).

6. The electric screw tightening tool according to claim 5, characterized in that: The spring (13) is sleeved with the limiting rod (11), and the opposite ends of the two springs (13) are respectively fixed to the opposite ends of the inner cavities of the two mounting holes.

7. The electric screw-tightening tool according to claim 5, characterized in that: The opposite ends of the two limiting rods (11) are respectively located inside a single group of limiting holes (10).

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