Electric screwdriver

Abstract

The utility model discloses an electric screwdriver which comprises a tool body, a rotary driving part is arranged on the tool body, the rotary driving part is used for driving a screwdriver bit to conduct screwing operation on a screw, the rotary driving part is connected with a clamping mechanism, and the clamping mechanism comprises a sliding moving cylinder for the screwdriver bit to slide. A sliding groove is formed in the side wall of the sliding moving cylinder, the screwdriver bit is connected with a left pushing block and a right pushing block, the left pushing block and the right pushing block are connected with a middle rotating block through a connecting block, the middle rotating block is used for connecting the left pushing block and the right pushing block with a pushing piece, and the pushing piece is connected with a clamping block. By means of the components, when the screw to be screwed abuts against the bolt bit, the device continues to be pushed forwards, the screwdriver bit moves inwards along the axial position of the sliding moving barrel, the left pushing block and the right pushing block are driven to move, and therefore the connecting block drives the pushing piece to push the clamping block to be close to the center position of the screwdriver bit and abut against the screw to be screwed.

Description

Technical Field

[0001] The utility model relates to the technical field of power tools, and particularly to an electric screwdriver. Background Art

[0002] An electric screwdriver, also known as an electric drill or electric driver, is a power tool used for tightening and loosening screws. It is a commonly used tool in industrial enterprises and processing, and is widely used in fields such as equipment loading and unloading, maintenance, furniture and building materials, and electrical appliance installation. From traditional manual screwdrivers to electric and pneumatic screwdrivers, the emergence of these power tools has greatly improved the operation efficiency because they do not require manual turning. In the prior art, electric screwdrivers with functions such as quick-change bits, magnetic adsorption assistance, and flexible shaft tightening have been developed to adapt to various usage scenarios. However, in actual operation scenarios, there are still some problems. For example, when using an electric screwdriver to turn a screw, the screw may shift during rotation, resulting in being unable to be screwed into the corresponding screw groove, which brings inconvenience to screw assembly.

[0003] Chinese Patent CN220922223U discloses an electric screwdriver, which consists of a tool main body part, a holding part, a rotary driving part, a terminal execution part, and a grasping mechanism. A driving motor and a transmission mechanism are installed in the tool main body part, and the transmission mechanism transmits the rotational torque of the motor to the rotary driving part to make it rotate at high speed. The terminal execution part is detachably installed at the end of the rotary driving part and is coaxial with the rotary driving part, and rotates at high speed synchronously for operation. The grasping mechanism includes a transmission component and a force-bearing component. The transmission component consists of a rotary ring, a connecting block, and a movable rod. The rotary ring is threadedly connected to the rotary driving part, the connecting block is slidably connected to the side surface of the rotary ring, and the movable rod is rotatably connected to the surface of the connecting block. The force-bearing component consists of a sliding rod, a connecting piece, and a clamping ring. A connecting piece is rotatably connected to the inner side wall of the movable rod, a sliding rod is fixedly connected to the bottom of the connecting piece, and a clamping ring is fixedly connected to the tail of the sliding rod. When the rotary ring rotates, it drives the connecting block to form a sliding structure, and the inclined movable rod applies a thrust to the connecting piece, so that the sliding rod slides along the side surface of the rotary driving part, and the clamping ring moves accordingly to achieve the grasping of the screw. This design can effectively prevent the screw from shifting during rotation and improve the accuracy and efficiency of the operation. In addition, a protective cover is provided on the surface of the terminal execution part, which is made of transparent plastic material, providing additional protection for the operator when tightening the screw, reducing the risk of personal injury, and not affecting visual observation and operation at the same time.

[0004] However, the effect of the grasping mechanism of the device in this patent document cannot be guaranteed. It only provides a clamping method and is applicable to fewer screw models. Summary of the Utility Model

[0005] In view of the above problems, an electric screwdriver is provided, which includes a tool body. A rotary driving member is provided on the tool body. The rotary driving member is used to drive a screwdriver bit to perform a screwing operation on a screw. The rotary driving member is connected with a clamping mechanism. The clamping mechanism includes a sliding moving cylinder for the screwdriver bit to slide. A sliding groove is formed on the side wall of the sliding moving cylinder. The screwdriver bit is connected with a left pushing block and a right pushing block through the sliding groove. The left pushing block and the right pushing block are connected with an intermediate rotating block through a connecting block. The intermediate rotating block is used to connect the left pushing block and the right pushing block with corresponding pushing members. The pushing members are connected with clamping blocks. When the screw to be screwed is in contact with the bolt bit, and the device is continuously pushed forward, the screwdriver bit is pressed and moves inward along the axial position of the sliding moving cylinder, driving the left pushing block and the right pushing block to move, so as to drive the pushing members to push the clamping blocks to approach the center position of the screwdriver bit through the connecting block and be in contact with the screw to be screwed.

[0006] Preferably, a clamping mechanism is provided on the clamping block. The clamping block is composed of a first clamping block and a second clamping block. The first clamping block and the second clamping block are connected with a central abutting block through a rotating member. When the clamping block approaches the center position of the screwdriver bit through the pushing member, the central abutting block first abuts against the screw to be screwed. During the continuous movement of the pushing block, the central abutting block drives the first clamping block and the second clamping block to approach the center position of the screwdriver bit through the rotating member until the first clamping block and the second clamping block are in contact with the screw to be screwed.

[0007] Preferably, a moving column is fixedly connected to the surface of the screwdriver bit that is not in contact with the screw to be screwed. A central groove is formed in the moving column. A connecting column is arranged in the central groove. The left pushing block and the right pushing block are rotatably connected with the moving column through the connecting column. A limiting groove for the moving column to pass through is provided at the bottom of the sliding moving cylinder.

[0008] Preferably, a limiting sliding rod is provided on the pushing member. A moving groove adapted to the limiting sliding rod is formed on the device. Through the cooperation of the limiting sliding rod and the moving groove, the movement of the pushing member is limited to a specified plane.

[0009] Preferably, a gripping member convenient for manual grasping is fixedly connected to the tool body.

[0010] Preferably, a protective cover for protecting the gripping personnel is provided at the front end of the tool body.

[0011] The beneficial effects of the present utility model compared with the prior art are:

[0012] 1. By introducing the design of the intermediate rotating block and the connecting block in the clamping mechanism of the electric screwdriver, the present utility model realizes the coordinated operation of the left pushing block and the right pushing block, improving the stability and clamping force of the clamping mechanism. This design ensures that the screw can be firmly clamped during the screwing operation, reducing errors and possible damages caused by unstable clamping, and significantly enhancing the operation accuracy and efficiency.

[0013] 2. The electric screwdriver of the present utility model is provided with a clamping mechanism on the clamping block, which consists of a first clamping block and a second clamping block and is connected to the central abutting block through a rotating member. This structural design enables the clamping block to more flexibly adapt to screws of different specifications, achieving rapid and accurate clamping. At the same time, the leading role of the central abutting block ensures that the initial contact between the clamping block and the screw is more stable, avoiding screw damage or slippage caused by improper initial contact.

[0014] 3. The electric screwdriver of the present utility model is fixedly connected with a gripping member convenient for manual grasping on the tool body, and at the same time, a protective cover is provided at the front end. These designs take into account the operator's use experience and safety. The ergonomic design of the gripping member makes it not easy to get fatigued during long-term operation, improving the working comfort. The protective cover at the front end effectively prevents the possible flying of debris during the operation, protecting the operator's safety, and at the same time protecting the tool from damage and extending the service life of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional view of an electric screwdriver.

[0016] Figure 2 is a three-dimensional view of the clamping mechanism of an electric screwdriver.

[0017] Figure 3 is a three-dimensional view inside the clamping mechanism of an electric screwdriver.

[0018] Figure 4 is an electric screwdriver Figure 3 exploded view of the components in.

[0019] Figure 5 is a top view of the clamping mechanism of an electric screwdriver.

[0020] Figure 6 is an electric screwdriver Figure 5 cross-sectional view taken along A - A in.

[0021] The reference numerals in the figure are: 1, tool body; 2, rotary drive member; 3, clamping mechanism; 31, screwdriver bit; 311, moving column; 312, central groove; 313, connecting column; 32, sliding moving cylinder; 321, sliding groove; 322, limiting groove; 33, left pushing block; 34, right pushing block; 35, connecting block; 36, intermediate rotating block; 37, pushing member; 371, limiting sliding rod; 372, moving groove; 38, clamping block; 4, clamping mechanism; 41, first clamping block; 42, second clamping block; 43, central abutting block; 44, rotating member; 5, holding member; 6, protective cover. Detailed implementation manners

[0022] In order to further understand the features, technical means, specific purposes and functions achieved by the present utility model, the present utility model will be described in further detail below in conjunction with the accompanying drawings and specific implementation manners.

[0023] Refer to Figures 1-6 : An electric screwdriver, comprising a tool body 1, a rotary drive member 2 is provided on the tool body 1, the rotary drive member 2 is used to drive the screwdriver bit 31 to perform a screwing operation on a screw, the rotary drive member is connected with a clamping mechanism 3, the clamping mechanism 3 includes a sliding moving cylinder 32 for the screwdriver bit 31 to slide, a sliding groove 321 is formed in the side wall of the sliding moving cylinder 32, the screwdriver bit 31 is connected with a left pushing block 33 and a right pushing block 34 through the sliding groove 321, the left pushing block 33 and the right pushing block 34 are connected with an intermediate rotating block 36 through a connecting block 35, the intermediate rotating block 36 is used to connect the left pushing block 33 and the right pushing block 34 with corresponding pushing members 37, the pushing members 37 are connected with clamping blocks 38, when the screw to be screwed is abutted against the screwdriver bit, the device is further pushed forward, the screwdriver bit 31 is pressed to move inward along the axial position of the sliding moving cylinder 32, driving the left pushing block 33 and the right pushing block 34 to move, thereby driving the pushing members 37 to push the clamping blocks 38 to approach the center position of the screwdriver bit 31 through the connecting block 35 and abut against the screw to be screwed.

[0024] In the prior art, the clamping effect of the screw to be tightened cannot be guaranteed. In view of this, in the present utility model, a rotary driving member 2 is installed on the tool body 1, and the rotary driving member 2 is responsible for driving the screwdriver bit 31 to realize the tightening operation of the screw; the rotary driving member 2 is connected to the clamping mechanism 3, and the clamping mechanism 3 includes a sliding moving cylinder 32, and a sliding groove 321 is provided on its side wall so that the screwdriver bit 31 can slide therein; the screwdriver bit 31 is connected to the left pushing block 33 and the right pushing block 34 through the sliding groove 321, and these two pushing blocks are connected to the middle rotating block 36 through the connecting block 35, and the function of the middle rotating block 36 is to connect the left pushing block 33 and the right pushing block 34 with the corresponding pushing member 37; the other end of the pushing member 37 is connected to the clamping block 38. When the screw to be tightened contacts the screwdriver bit 31, the operator continues to push the device forward, so that the screwdriver bit 31 is oppressed and moves inward along the axial position of the sliding moving cylinder 32, and then drives the left pushing block 33 and the right pushing block 34 to move, and pushes the pushing member 37 through the connecting block 35, so that the clamping block 38 moves towards the center position of the screwdriver bit 31 and abuts against the screw to be tightened, thereby completing the clamping action and preparing for the tightening operation of the screw.

[0025] Referring to Figures 2-6 : A clamping mechanism 4 is provided on the clamping block 38. The clamping block 38 is composed of a first clamping block 41 and a second clamping block 42. The first clamping block 41 and the second clamping block 42 are connected to the central abutting block 43 through a rotating member 44. When the clamping block 38 approaches the center position of the screwdriver bit 31 through the pushing member 37, the central abutting block 43 first abuts against the screw to be tightened. During the continuous movement of the pushing block, the central abutting block 43 drives the first clamping block 41 and the second clamping block 42 to approach the center position of the screwdriver bit 31 through the rotating member until the first clamping block 41 and the second clamping block 42 abut against the screw to be tightened.

[0026] In this electric screwdriver, the clamping block 38 is composed of two independent components, namely the first clamping block 41 and the second clamping block 42. The first clamping block 41 and the second clamping block 42 are connected to the central abutting block 43 through a rotating member 44. When the clamping block 38 moves towards the center position of the screwdriver bit 31 through the pushing member 37, the central abutting block 43 first contacts the screw to be tightened. As the pushing block continues to move, the central abutting block 43 drives the first clamping block 41 and the second clamping block 42 to further approach the center position of the screwdriver bit 31 by the action of the rotating member. This process continues until the first clamping block 41 and the second clamping block 42 are both in full contact with the screw to be tightened and clamping is achieved. Through such a design, the electric screwdriver can ensure that when tightening the screw, the screw is stably fixed at the center position of the screwdriver bit 31, thereby improving the accuracy and efficiency of the tightening operation.

[0027] Referring to Figures 3-6: On one side of the screwdriver bit 31 that does not contact the screw to be tightened, a moving column 311 is fixedly connected. A central groove 312 is provided on the moving column 311. A connecting column 313 is provided in the central groove 312. The left pushing block 33 and the right pushing block 34 are rotatably connected to the moving column 311 through the connecting column 313. A limiting groove 322 for the moving column 311 to pass through is provided at the bottom of the sliding moving cylinder 32.

[0028] In the electric screwdriver, on one side of the screwdriver bit 31 that does not contact the screw to be tightened, a moving column 311 is fixedly connected. A central groove 312 is provided on the moving column 311. In the central groove 312, a connecting column 313 is provided. The left pushing block 33 and the right pushing block 34 are rotatably connected to the moving column 311 through this connecting column 313. This design allows the pushing blocks to rotate on the moving column 311. At the same time, a limiting groove 322 is provided at the bottom of the sliding moving cylinder 32. The limiting groove 322 is used to limit the moving range of the moving column 311 to ensure its operation at an appropriate position within the sliding moving cylinder 32. When the electric screwdriver works, the left pushing block 33 and the right pushing block 34 can work together through the rotational connection between the connecting column 313 and the moving column 311 to clamp and release the screw, while the limiting groove 322 at the bottom of the sliding moving cylinder 32 ensures that the moving column 311 performs these operations at the correct position.

[0029] Refer to Figures 2-6 : A limiting sliding rod 371 is provided on the pushing member 37. A moving groove 372 adapted to the limiting sliding rod 371 is provided on the device. Through the cooperation of the limiting sliding rod 371 and the moving groove 372, the movement of the pushing member 37 is limited to a specified plane.

[0030] In the electric screwdriver described above, the pushing member 37 is fixedly connected with a limiting sliding rod 371. This design is used to control the moving range of the pushing member 37. A moving groove 372 adapted to the limiting sliding rod 371 is provided on the device. The moving groove 372 provides a sliding path for the limiting sliding rod 371. When the limiting sliding rod 371 slides in the moving groove 372, the cooperation between the two ensures that the pushing member 37 can only move within a specified plane. This design allows the pushing member 37 to be stable and accurate when performing tasks, while limiting its moving range to prevent excessive movement or misoperation, ensuring the operation accuracy and reliability of the electric screwdriver.

[0031] Refer to Figure 1 : A holding member 5 that is convenient for manual grasping is fixedly connected to the tool body 1.

[0032] In the electric screwdriver described above, a gripping member 5 is fixedly connected to the tool body 1. The design of this gripping member 5 takes into account the convenience of manual grasping. It allows the operator to comfortably hold the electric screwdriver, ensuring good control and stability during use. The design of the gripping member 5 usually includes an ergonomic shape and possibly anti-slip textures to improve the comfort and safety of operation. Through the gripping member 5, the operator can accurately guide the electric screwdriver to work while reducing hand fatigue.

[0033] Refer to Figure 1 : A protective cover 6 for protecting the gripping person is provided at the front end of the tool body 1.

[0034] In the electric screwdriver described above, a protective cover 6 is provided at the front end of the tool body 1. Its main function is to protect the safety of the gripping person. The protective cover 6 acts as a barrier during operation, preventing debris that may fly out when the screw is tightened or loosened, moving parts of the tool itself, or injuries caused by improper operation. Through this design, the accidental risk during work can be reduced, and the safety of using the electric screwdriver can be improved.

[0035] The above embodiments only represent one or several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the appended claims.

Claims

1. An electric screwdriver, comprising a tool body (1), characterized in that A rotary driving member (2) is provided on the tool body (1). The rotary driving member (2) is used to drive the screwdriver bit (31) to perform the screwing operation on the screw. The rotary driving member is connected with a clamping mechanism (3). The clamping mechanism (3) includes a sliding moving cylinder (32) for the screwdriver bit (31) to slide. A sliding groove (321) is formed on the side wall of the sliding moving cylinder (32). The screwdriver bit (31) is connected with a left pushing block (33) and a right pushing block (34) through the sliding groove (321). The left pushing block (33) and the right pushing block (34) are connected with an intermediate rotating block (36) through a connecting block (35). The intermediate rotating block (36) is used to connect the left pushing block (33) and the right pushing block (34) with corresponding pushing members (37). The pushing member (37) is connected with a clamping block (38). When the screw to be tightened abuts against the bolt bit, continue to push the device forward. The screwdriver bit (31) is pressed to move inward along the axial position of the sliding moving cylinder (32), driving the left pushing block (33) and the right pushing block (34) to move. Thus, the pushing member (37) is driven through the connecting block (35) to push the clamping block (38) to approach the center position of the screwdriver bit (31) and abut against the screw to be tightened.

2. An electric screwdriver according to claim 1, characterized in that, A clamping mechanism (4) is provided on the clamping block (38). The clamping block (38) is composed of a first clamping block (41) and a second clamping block (42). The first clamping block (41) and the second clamping block (42) are connected with a central abutting block (43) through a rotating member (44). When the clamping block (38) approaches the center position of the screwdriver bit (31) through the pushing member (37), the central abutting block (43) first abuts against the screw to be tightened. During the continuous movement of the pushing block, the central abutting block (43) drives the first clamping block (41) and the second clamping block (42) to approach the center position of the screwdriver bit (31) through the rotating member until the first clamping block (41) and the second clamping block (42) abut against the screw to be tightened.

3. An electric screwdriver according to claim 1, characterized in that, A moving column (311) is fixedly connected to the surface of the screwdriver bit (31) that does not contact the screw to be tightened. A central groove (312) is formed on the moving column (311). A connecting column (313) is arranged in the central groove (312). The left pushing block (33) and the right pushing block (34) are rotatably connected with the moving column (311) through the connecting column (313). A limiting groove (322) for the moving column (311) to pass through is provided at the bottom of the sliding moving cylinder (32).

4. An electric screwdriver according to claim 1, characterized in that, A limiting sliding rod (371) is provided on the pushing member (37). A moving groove (372) adapted to the limiting sliding rod (371) is formed on the device. Through the cooperation of the limiting sliding rod (371) and the moving groove (372), the movement of the pushing member (37) is limited to a specified plane.

5. An electric screwdriver according to claim 1, characterized in that, A holding member (5) convenient for manual grasping is fixedly connected to the tool body (1).

6. The electric screwdriver according to claim 1, wherein A protective cover (6) for protecting the holding personnel is provided at the front end of the tool body (1).

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