Chuck electric screwdriver

Abstract

The invention belongs to the technical field of screwdrivers, and particularly relates to a chuck electric screwdriver which comprises a screwdriver shell, a drill bit sleeve is arranged in the left side of the screwdriver shell and comprises a sleeve head, threaded teeth and a first clamping groove, the threaded teeth are arranged on the inner wall of the middle of the sleeve head, and the first clamping groove is formed in the inner wall of the right side of the sleeve head. Three chucks are arranged on the left side of the interior of the sleeve head, a transmission structure is arranged on the right sides of the chucks, a power block is arranged on the right side of the transmission structure, and a first bearing is arranged on the sleeve head; a power block is arranged to drive a threaded block to rotate, the threaded block moves left and right in a sleeve head while rotating, the threaded block moves leftwards to drive three second clamping blocks and three clamping blocks to move leftwards, and the three clamping blocks are squeezed by the inner wall of the sleeve head to move towards the center at the same time; while the screwdriver heads of different types and models are clamped and fixed, the concentricity of the screwdriver heads is kept, and the stability of the electric screwdriver is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of screwdrivers, in particular to a chuck electric screwdriver. Background Art

[0002] An electric screwdriver is a tool that uses an electric motor as a power source to drive the shaft to rotate, causing the screwdriver head to rotate and drive the screws and nuts to complete the tightening or removal work. According to the usage scenario and function, electric screwdrivers can be divided into multiple types such as direct-insert type, pistol-type and fixed-torque type, and can also be divided into different levels such as industrial grade, professional grade and household grade.

[0003] Ordinary electric screwdrivers on the market can usually only hold regular bits to remove screws. They cannot directly clamp drill bits for drilling holes or taps for tapping, or clamp grinding bits for polishing and grinding. Only small electric grinders and electric drills can clamp drill bits, grinding bits, and taps at the same time.

[0004] 1. The existing electric screwdriver clamp is fixed, and the clamp needs to be frequently replaced to adapt to accessories of various sizes. In addition, the maximum clamping outer diameter is usually only about 3mm, which has the problem of limited clamping size range.

[0005] 2. When conventional electric screwdrivers are installed, there will inevitably be a large gap between the screwdriver bit and the hexagonal hole, and the concentricity cannot be guaranteed during use.

[0006] Therefore, a chuck electric screwdriver is proposed to address the above problems. Summary of the invention

[0007] 1. Technical issues to be solved

[0008] In view of the deficiencies of the prior art, the present invention provides a chuck electric screwdriver, which solves the problems of the prior electric screwdriver having a limited clamping size range and being unable to ensure concentricity.

[0009] (II) Technical solution

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a chuck electric screwdriver, comprising a screwdriver housing, a drill sleeve is arranged inside the left side of the screwdriver housing, the drill sleeve comprises a sleeve, threaded teeth and a first slot, the threaded teeth are arranged on the middle inner wall of the sleeve, the first slot is opened on the right inner wall of the sleeve, three chucks are arranged on the left side of the sleeve, a transmission structure is arranged on the right side of the chuck, a power block is arranged on the right side of the transmission structure, a first bearing is arranged on the sleeve, a second bearing is arranged on the transmission structure, and the second bearing is engaged and connected with the inner cavity on the left side of the screwdriver housing.

[0011] Preferably, the transmission structure includes a threaded block, a second slot, a connecting block and a first slot, the right end of the threaded block is fixedly connected to the left end of the connecting block, the right end of the first slot is fixedly connected to the left end of the first slot, the threaded block is threadedly connected to the thread teeth, a retaining spring is provided on the connecting block, and the retaining spring is engaged and connected with the first slot.

[0012] Preferably, the connecting block is snap-connected to the inner ring of the second bearing, and the outer ring of the second bearing is snap-connected to the inner cavity of the screwdriver housing.

[0013] Preferably, the first clamping block is arranged in a plum blossom column shape, and the first clamping block is slidably connected to the left side of the power block.

[0014] Preferably, the inner ring of the first bearing is snap-fitted and connected to the outer wall of the sleeve, and the outer ring of the first bearing is snap-fitted and connected to the inner cavity of the screwdriver housing.

[0015] Preferably, the chuck includes a clamping block, a second clamping block and a spring, the outer wall of the clamping block is arranged in an arc-shaped slope, the two ends of the spring are engaged and connected with two adjacent clamping blocks, the clamping block slides left and right in the left inner cavity of the sleeve, and the left inner cavity of the sleeve is arranged in an arc-shaped slope, the right side of the threaded block is fixedly connected to the second clamping block, and the second clamping block is slidably connected to the second clamping groove.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a chuck electric screwdriver, which has the following beneficial effects:

[0018] The chuck electric screwdriver drives the thread block to rotate by means of a power block, and the thread block moves left and right in the socket while rotating. The thread block moves leftward, driving the three second clamping blocks and the three clamping blocks to move leftward, so that the three clamping blocks are squeezed by the inner wall of the socket and move toward the center at the same time, so that different types and models of screw bits can be clamped and fixed while the screw bits can be kept concentric, thereby improving the stability of the electric screwdriver. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of the present invention;

[0022] Figure 3 It is a schematic cross-sectional view of the three-dimensional structure of the drill bit sleeve of the present invention;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the chuck of the present invention;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the transmission structure of the present invention.

[0025] Legend:

[0026] 1. Screwdriver housing;

[0027] 2. drill bit sleeve; 201. sleeve head; 202. threaded teeth; 203. first slot;

[0028] 3. Transmission structure; 301. Thread block; 302. Second clamping groove; 303. Connecting block; 304. First clamping block;

[0029] 4. Power block; 5. First bearing; 6. Second bearing; 7. Circlip;

[0030] 8. chuck; 801. clamping block; 802. second clamping block; 803. spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0032] Specific examples are given below.

[0033] See also Figure 1-Figure 5The present invention provides a chuck electric screwdriver, comprising a screwdriver housing 1, a drill sleeve 2 is arranged inside the left side of the screwdriver housing 1, the drill sleeve 2 comprises a sleeve 201, thread teeth 202 and a first clamping groove 203, the thread teeth 202 are arranged on the middle inner wall of the sleeve 201, the first clamping groove 203 is opened on the right inner wall of the sleeve 201, three chucks 8 are arranged on the left side of the sleeve 201, a transmission structure 3 is arranged on the right side of the chuck 8, and the right side of the transmission structure 3 A power block 4 is provided, a first bearing 5 is provided on the sleeve 201, a second bearing 6 is provided on the transmission structure 3, and the second bearing 6 is engaged with the inner cavity on the left side of the screwdriver housing 1. The transmission structure 3 includes a threaded block 301, a second slot 302, a connecting block 303 and a first block 304. The right end of the threaded block 301 is fixedly connected to the left end of the connecting block 303, the right end of the first block 304 is fixedly connected to the left end of the first block 304, and the threaded block 301 is connected to the screwdriver housing 1. The threaded teeth 202 are threadedly connected, a retaining spring 7 is arranged on the connecting block 303, and the retaining spring 7 is engaged with the first slot 203, the connecting block 303 is engaged with the inner ring of the second bearing 6, the outer ring of the second bearing 6 is engaged with the inner cavity of the screwdriver housing 1, the first retaining block 304 is arranged in a plum blossom column shape, and the first retaining block 304 is slidably connected with the left side of the power block 4, the inner ring of the first bearing 5 is engaged with the outer wall of the sleeve 201, and the outer ring of the first bearing 5 is engaged with the screwdriver housing 1 is snap-connected with the inner cavity of the sleeve 201, the chuck 8 includes a clamping block 801, a second clamping block 802 and a spring 803, the outer wall of the clamping block 801 is arranged in an arc-shaped slope, the two ends of the spring 803 are snap-connected with two adjacent clamping blocks 801, the clamping block 801 slides left and right in the inner cavity on the left side of the sleeve 201, and the inner cavity on the left side of the sleeve 201 is arranged in an arc-shaped slope, the right side of the threaded block 301 is fixedly connected with the second clamping block 802, and the second clamping block 802 is slidably connected with the second slot 302.

[0034] Specifically, the power block 4 drives the thread block 301 to rotate, and the thread block 301 moves left and right in the socket 201 while rotating. The thread block 301 moves to the left, driving the three second clamping blocks 802 and the three clamping blocks 801 to move to the left, so that the three clamping blocks 801 are squeezed by the inner wall of the socket 201 and move toward the center at the same time, so that different types and models of screw bits can be clamped and fixed while keeping the concentricity of the screw bits, thereby improving the stability of the electric screwdriver.

[0035] Working principle: When using the electric screwdriver, first fix the socket head 201 to prevent the socket head 201 from rotating, start the electric screwdriver, and the power block 4 drives the first clamping block 304 to rotate, and the first clamping block 304 drives the connecting block 303 to rotate, thereby driving the thread block 301 to rotate in the socket head 201 and move left and right at the same time, and the thread block 301 moves to the left and drives the second clamping block 802 and the clamping block 801 to rotate and move left and right at the same time, so that the three clamping blocks 801 are squeezed by the inner wall of the socket head 201 and move toward the center at the same time, and different types and models of screw bits are clamped and fixed to complete the installation, and the power block 4 rotates in the opposite direction to drive the thread block 301 to rotate in the opposite direction and move to the right at the same time, and the spring 803 pushes the clamping block 801 to move outward and expand, and at the same time, the clamping block 801 is squeezed by the inner cavity wall of the socket head 201 and moves to the right, thereby releasing the fixation of the screw bit and facilitating the replacement of the screw bit.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A chuck electric screwdriver, comprising a screwdriver housing (1), characterized in that: A drill sleeve (2) is arranged inside the left side of the screwdriver housing (1), and the drill sleeve (2) comprises a sleeve (201), thread teeth (202) and a first clamping groove (203), wherein the thread teeth (202) are arranged on the middle inner wall of the sleeve (201), and the first clamping groove (203) is opened on the right inner wall of the sleeve (201), and three chucks (8) are arranged on the left side of the sleeve (201), and a transmission structure (3) is arranged on the right side of the chuck (8), and a power block (4) is arranged on the right side of the transmission structure (3), and a first bearing (5) is arranged on the sleeve (201), and a second bearing (6) is arranged on the transmission structure (3), and the second bearing (6) is engaged and connected with the inner cavity on the left side of the screwdriver housing (1).

2. The chuck electric screwdriver according to claim 1, characterized in that: The transmission structure (3) comprises a threaded block (301), a second clamping groove (302), a connecting block (303) and a first clamping block (304); the right end of the threaded block (301) is fixedly connected to the left end of the connecting block (303); the right end of the first clamping block (304) is fixedly connected to the left end of the first clamping block (304); the threaded block (301) is threadedly connected to the thread teeth (202); a retaining spring (7) is provided on the connecting block (303), and the retaining spring (7) is engaged and connected with the first clamping groove (203).

3. The chuck electric screwdriver according to claim 2, characterized in that: The connecting block (303) is snap-fitted and connected to the inner ring of the second bearing (6), and the outer ring of the second bearing (6) is snap-fitted and connected to the inner cavity of the screwdriver housing (1).

4. The chuck electric screwdriver according to claim 2, characterized in that: The first clamping block (304) is arranged in the shape of a plum blossom column, and the first clamping block (304) is slidably connected to the left side of the power block (4).

5. The chuck electric screwdriver according to claim 4, characterized in that: The inner ring of the first bearing (5) is snap-fitted to the outer wall of the sleeve (201), and the outer ring of the first bearing (5) is snap-fitted to the inner cavity of the screwdriver housing (1).

6. The chuck electric screwdriver according to claim 1, characterized in that: The chuck (8) comprises a clamping block (801), a second clamping block (802) and a spring (803); the outer wall of the clamping block (801) is arranged in an arc-shaped slope; the two ends of the spring (803) are engaged with two adjacent clamping blocks (801); the clamping block (801) slides left and right in the inner cavity on the left side of the sleeve (201); and the inner cavity on the left side of the sleeve (201) is arranged in an arc-shaped slope; the right side of the threaded block (301) is fixedly connected to the second clamping block (802); and the second clamping block (802) is slidably connected to the second clamping groove (302).

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