A screwdriver

Abstract

The utility model discloses a bolt driver, including driver connecting portion and driver main part, driver connecting portion and driver main part fixed connection, driver connecting portion is connected with power device, and driver connecting portion drives driver main part to rotate around the own axis under the drive of power device, and the inside hollow of driver main part forms the accommodation cavity, is provided with the drive friction pad in the accommodation cavity, when the bolt head is placed in the accommodation cavity, it is butt joint with drive friction pad, and the axis of bolt coincides or is adjacent with the axis of driver main part, and the bolt head and drive friction pad friction transmission, and the flexible friction contact can buffer impact force, avoid bolt head abrasion, slide angle, do not need to strictly match bolt head shape, reduce the number of tools, utilize power device to drive bolt rotation, improve operating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of screw and nut assembly technology, specifically, to a bolt driver. Background Technology

[0002] Bolts are a type of fastener consisting of a head and a threaded shank (a cylinder with external threads). They are used in conjunction with nuts. Bolts are classified by head shape: hexagonal head, round head, square head, countersunk head, etc. They are designed in various shapes according to different uses. For example, adjusting feet consist of a threaded shank and a round-headed foot, which are assembled and used with nuts or nut plugs.

[0003] Currently, screws and nuts are generally sold together. The purpose of this combination is to ensure that the nut and screw are compatible and to avoid the occurrence of defective products. At present, the assembly of nuts and bolts is mainly done manually. One hand holds the bolt, and the other hand places the nut on the bolt. Then, the nut needs to be rotated continuously to tighten it into the predetermined position on the bolt. Because the hand is constantly rotating the nut, it increases the labor intensity of the person, causing finger pain, and the installation efficiency is also very low, which is not conducive to use. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a bolt driver that addresses the aforementioned existing technology. The bolt driver of this utility model consists of a driver connecting part, a main body, and a built-in driving friction pad. The connecting part is connected to an external power device (such as a motor or electric drill). Because it is fixedly connected to the main body, it can drive the main body to rotate synchronously around its axis. The hollow interior of the main body forms a receiving cavity. After the bolt head is inserted, it fits tightly against the friction pad inside the cavity, and the bolt axis coincides with or is adjacent to the axis of the main body. The rotational torque is transmitted to the bolt through the friction pad, achieving tightening or loosening. Compared with traditional rigid clamping tools, it has significant advantages: flexible friction contact can buffer impact force, avoiding bolt head wear and slippage; it does not require strict matching of the bolt head shape, reducing the number of tools; and it uses a power device to drive the bolt rotation, improving operational efficiency.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A bolt actuator includes an actuator connecting part and an actuator body part. The actuator connecting part is fixedly connected to the actuator body part and is connected to a power device. Under the drive of the power device, the actuator connecting part drives the actuator body part to rotate around its own axis. The interior of the actuator body part is hollow to form a receiving cavity. A driving friction pad is provided in the receiving cavity. When the bolt head is placed in the receiving cavity, it abuts against the driving friction pad, and the axis of the bolt coincides with or is adjacent to the axis of the actuator body part. The bolt head and the driving friction pad are subjected to frictional transmission.

[0007] To optimize the above technical solution, the following measures were also taken:

[0008] The aforementioned driver connection includes a main body connection seat and a connecting cylinder. The connecting cylinder is fixedly connected to the main body connection seat. A connecting hole is provided in the center of the connecting cylinder, and the connecting hole is connected to the output shaft of the power unit.

[0009] The aforementioned connecting cylinder has a radial threaded hole, and the set screw is screwed into the radial threaded hole and abuts against the output shaft of the power unit.

[0010] The aforementioned power unit includes an electric motor, which is fixed on a bracket.

[0011] The aforementioned driver connection includes a main body connection seat and a clamping shaft. The clamping shaft is fixedly mounted on the main body connection seat, and the driver connection is fixedly mounted on the clamp of the power unit via the clamping shaft.

[0012] The aforementioned driving friction pad has a positioning groove at its center.

[0013] The aforementioned driving friction pad has friction textures on the positioning groove wall.

[0014] The aforementioned driving friction pad is interference-fitted with the receiving cavity.

[0015] The aforementioned main connecting seat is provided with a through hole.

[0016] The aforementioned main body connector and the driver body are connected by threads or integrally formed.

[0017] This utility model discloses a bolt actuator, comprising an actuator connecting part and an actuator body part. The actuator connecting part is fixedly connected to the actuator body part and connected to a power device. Under the drive of the power device, the actuator connecting part drives the actuator body part to rotate around its own axis. The interior of the actuator body part is hollow, forming a receiving cavity. A driving friction pad is provided inside the receiving cavity. When the bolt head is placed in the receiving cavity, it abuts against the driving friction pad, and the axis of the bolt coincides with or is adjacent to the axis of the actuator body part. The bolt head and the driving friction pad undergo frictional transmission. The bolt actuator consists of an actuator connecting part, a body part, and an internal drive. The friction pad is connected to an external power unit (such as a motor or electric drill). Because it is fixedly connected to the main body, it can drive the main body to rotate synchronously around the axis. The hollow interior of the main body forms a receiving cavity. After the bolt head is inserted, it fits tightly with the friction pad inside the cavity, and the bolt axis coincides with or is adjacent to the axis of the main body. The rotational torque is transmitted to the bolt through the friction pad, realizing tightening or loosening. Compared with traditional rigid clamping tools, it has significant advantages: the flexible friction contact can buffer the impact force and avoid bolt head wear and slippage; there is no need to strictly match the bolt head shape, reducing the number of tools; and the use of a power unit to drive the bolt rotation improves operating efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of this utility model;

[0019] Figure 2 This is an exploded view of the driver according to Embodiment 1 of this utility model;

[0020] Figure 3 This is a schematic diagram of the driver with a retaining ring according to Embodiment 2 of this utility model;

[0021] Figure 4 This is an exploded view of the driver with retaining ring according to Embodiment 2 of this utility model;

[0022] Figure 5 This is a schematic diagram of the driver with clamping shaft structure according to Embodiment 3 of this utility model;

[0023] Figure 6 This is a schematic diagram of the connection between the driver and the electric drill in Embodiment 3 of this utility model. Detailed Implementation

[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0025] Figures 1 to 6 This is a schematic diagram of the structure of this utility model.

[0026] The reference numerals in the drawings are as follows: driver connection part 1, main body connection seat 11, connecting cylinder 12, connecting hole 13, radial screw hole 14, set screw 15, clamping shaft 16, through hole 17, driver main body part 2, receiving cavity 21, power unit 3, motor 31, bracket 32, driving friction pad 4, positioning groove 41, friction texture 42, clamp 5, retaining ring 6.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings: Example

[0028] like Figures 1 to 2 As shown,

[0029] A bolt actuator, characterized in that it comprises an actuator connecting part 1 and an actuator body part 2, the actuator connecting part 1 and the actuator body part 2 being fixedly connected, the actuator connecting part 1 being connected to a power device 3, the actuator connecting part 1 driving the actuator body part 2 to rotate around its own axis under the drive of the power device 3, the interior of the actuator body part 2 being hollow to form a receiving cavity 21, the receiving cavity 21 being provided with a driving friction pad 4, the friction pad 4 being made of materials such as rubber, silicone, polyurethane, or polyurethane, having the characteristics of wear resistance and elasticity, the power device 3 being able to drive a drive wheel to rotate, the speed at which the power device 3 drives the drive wheel to rotate is between 500 r / min and 6000 r / min, preferably 2000 r / min, the power device 3 including a motor, the motor being connected to a reduction gearbox, the reduction gearbox achieving the required speed, and simultaneously being electrically connected to a speed regulator to achieve fine adjustment of the motor speed, when the bolt head is placed When the bolt is inside the cavity 21, the bolt head abuts against the driving friction pad 4, and the bolt axis coincides with or is adjacent to the axis of the driver body 2. The bolt head and the driving friction pad 4 are driven by friction. The bolt driver consists of a driver connection part, a main body, and an internal driving friction pad. The connection part is connected to an external power device (such as a motor or electric drill). Because it is fixedly connected to the main body, it can drive the main body to rotate synchronously around the axis. The hollow interior of the main body forms a cavity. After the bolt head is inserted, it fits tightly against the friction pad inside the cavity, and the bolt axis coincides with or is adjacent to the axis of the main body. The rotational torque is transmitted to the bolt through the friction pad, realizing tightening or loosening. Compared with traditional rigid clamping tools, it has significant advantages: flexible friction contact can buffer impact force and avoid bolt head wear and slippage; it does not require strict matching of bolt head shape and is compatible with various specifications such as hexagonal and round, reducing the number of tools; and it uses a power device to drive the bolt to rotate, improving operating efficiency.

[0030] The driver connection part 1 includes a main body connecting seat 11 and a connecting cylinder 12. The main body connecting seat 11 is fixed to the bottom end of the driver body 2 by welding or integral molding. The connecting cylinder 12 is connected and fixed to the main body connecting seat 11. The center of the connecting cylinder 12 is provided with a connecting hole 13, which is connected to the output shaft of the power device 3. The driver connection part 1 is composed of the main body connecting seat 11 and the connecting cylinder 12. The main body connecting seat 11 serves as the connecting structure between the connection part and the main body. It is fixed to the bottom end of the driver body 2 by welding or integral molding to ensure that the two are rigidly connected and rotate synchronously. After the connecting cylinder 12 is fixed to the main body connecting seat 11, the connecting hole 13 in its center becomes the core interface for docking with the power device 3. By cooperating with the output shaft of the power device (such as key connection, tight fit, etc.), the external power is stably transmitted to the entire driver, forming a complete power transmission path of "power device → connecting hole → connecting cylinder → main body connecting seat → driver body", which enhances structural stability and power transmission efficiency.

[0031] The connecting cylinder 12 has a radial screw hole 14, and the set screw 15 is screwed into the radial screw hole 14 and abuts against the output shaft of the power unit 3. This design ensures the reliability of power transmission (avoiding torque loss caused by slippage) and retains the flexibility of installation and removal (the driver and the power unit can be separated by loosening the set screw).

[0032] The power unit 3 includes a motor 31. A bracket 32 ​​has mounting holes adapted to the motor. The motor 31 is fixed to the bracket 32 ​​with screws. The bracket 32 ​​can be fixed to the workbench, equipment frame, or other basic structures by bolts, welding, etc., to form a reliable support. The power supply system includes a power adapter and a switch. The power adapter, switch, and motor are electrically connected. The switch is a forward and reverse control switch. The motor, switch, and female plug are connected by wires. The forward and reverse control circuit of the motor is existing technology, and the connection method is the same as existing technology. The power adapter and forward / reverse switch are existing technologies and are widely sold on the market. Their structure will not be described again. Just connect the wires to the corresponding contact points. The female plug can be connected to the male plug of the power adapter. Of course, the plug of the power adapter can be a female plug, and the plug on the motor circuit is a male plug. Therefore, the setting of male and female plugs cannot be a limiting condition. The connection point between the wire and the motor is equipped with a protective sleeve (not shown in the figure) to provide insulation protection.

[0033] The center of the drive friction pad 4 is provided with a positioning groove 41, which is funnel-shaped and has a tapered structure that is wider at the top and narrower at the bottom. When the bolt head is placed into the receiving cavity of the drive body, there is no need for precise alignment. The edge of the head will naturally slide towards the bottom of the groove along the inclined inner wall of the groove, achieving quick "centering". This greatly reduces the difficulty of manual alignment and is especially suitable for batch operations or working conditions with poor visibility. When the bolt head reaches the bottom of the groove, the narrow end of the groove will form a radial limit on it, ensuring that the bolt axis is highly coincident with the axis of the drive body, avoiding uneven friction force and torque transmission loss caused by eccentricity.

[0034] The positioning groove 41 of the driving friction pad 4 is provided with friction texture 42. The friction texture 42 (such as grid pattern, diagonal pattern, dotted protrusion, etc.) increases the surface roughness of the inner wall of the positioning groove, which greatly improves the friction with the bolt head. When the bolt head is guided into the bottom of the funnel-shaped groove and fits in, the rotating friction pad can generate stronger static friction through the "meshing" contact between the texture and the bolt head (rather than the simple contact of the smooth surface).

[0035] The driving friction pad 4 is interference-fitted with the receiving cavity 21 for easy fixing and installation.

[0036] The main connecting seat 11 is provided with a through hole 17, which allows the drive friction pad 4 to be pushed through the through hole 17 by a thin rod, making it easy to replace the drive friction pad 4 later.

[0037] The main body connector 11 is integrally formed with the driver body 2, which increases structural strength and reduces manufacturing difficulty.

[0038] To better protect the motor, the motor is housed inside the housing, with the motor's output shaft protruding from the housing and connected to the driver connection part 1. An adsorption magnet is provided under the housing or bracket to attract the ferromagnetic workbench surface.

[0039] How to use this invention:

[0040] Select the nut: Tighten the nut to be assembled onto the end of the bolt;

[0041] Bolt positioning: Hold the nut with your hand and align the head of the bolt to be operated with the opening of the receiving cavity 21 of the driver body 2. Precise alignment is not required. The bolt head will slide naturally to the bottom of the groove along the inclined inner wall of the funnel-shaped positioning groove 41 of the friction pad 4, achieving automatic "centering" (ensuring that the bolt axis coincides with or is adjacent to the axis of the driver body).

[0042] Speed ​​adjustment: The motor speed can be finely adjusted through the speed controller of the power unit according to the bolt specifications (size, material) and operation requirements. The normal speed range is 500r / min - 6000r / min, and 2000r / min is recommended. If high torque operation is required, the speed can be adjusted to the appropriate speed through the reduction gearbox.

[0043] Startup procedure:

[0044] Tightening the bolt: Press the "Forward" button on the forward / reverse control switch. The motor drives the driver connection 1 and the main body 2 to rotate synchronously. The friction pad 4, through the friction texture 42 on the positioning groove wall and the friction force between the friction pad 4 and the bolt head, drives the bolt to rotate clockwise until the bolt is tightened to the preset position. Then, lift the bolt. The bolt head separates from the driving friction pad 4, completing the assembly.

[0045] To remove the bolt: Press the "Reverse" button on the switch. The motor drives the driver to rotate in the opposite direction, which in turn drives the bolt to rotate counterclockwise through friction transmission until the nut separates from the bolt. Example

[0046] like Figures 3 to 4As shown, the bolt driver in this embodiment has a structure that is basically the same as that in embodiment one. The difference is that in this embodiment, the main body connecting seat 11 and the driver body 2 are connected by threads. The main body connecting seat 11 has a first thread on its outer periphery. The receiving cavity 21 of the driver body 2 has a second thread that is threadedly engaged with the first thread. A retaining ring 6 is provided at the port of the receiving cavity 21. The upper edge of the driving friction pad 4 abuts against the retaining ring 6 to prevent the driving friction pad 4 from detaching from the port of the receiving cavity 21. The method for installing the driving friction pad 4 is to separate the main body connecting seat 11 from the driver body 2, insert the driving friction pad 4 into the receiving cavity 21 of the driver body 2, so that the upper edge of the driving friction pad 4 abuts against the retaining ring 6, and screw the main body connecting seat 11 onto the driver body 2 to complete the installation of the driving friction pad 4. Example

[0047] like Figures 5 to 6 As shown, the bolt driver in this embodiment has a structure that is basically the same as that in the bolt driver in embodiment one. The difference is that in this embodiment, the driver connection part 1 includes a main body connection seat 11 and a clamping shaft 16. The clamping shaft 16 is fixedly disposed on the main body connection seat 11. The driver connection part 1 is fixedly installed on the clamp 5 of the power device 3 through the clamping shaft 16. The power device 3 is a hand drill or electric screwdriver with a clamp 5, which is convenient to carry and use.

[0048] The preferred embodiment of this utility model has been described, and various changes or modifications made by those skilled in the art will not depart from the scope of this utility model.

Claims

1. A bolt driver, characterized in that, The device includes a driver connection part (1) and a driver body part (2). The driver connection part (1) and the driver body part (2) are fixedly connected. The driver connection part (1) is connected to a power device (3). Under the drive of the power device (3), the driver connection part (1) drives the driver body part (2) to rotate around its own axis. The interior of the driver body part (2) is hollow to form a receiving cavity (21). A driving friction pad (4) is provided in the receiving cavity (21). When the bolt head is placed in the receiving cavity (21), the bolt head abuts against the driving friction pad (4), and the axis of the bolt coincides with or is adjacent to the axis of the driver body part (2). The bolt head and the driving friction pad (4) are driven by friction.

2. A bolt driver according to claim 1, characterized in that, The driver connection part (1) includes a main body connection seat (11) and a connecting cylinder (12). The connecting cylinder (12) is connected and fixed to the main body connection seat (11). A connecting hole (13) is provided in the center of the connecting cylinder (12). The connecting hole (13) is connected to the output shaft of the power device (3).

3. A bolt driver according to claim 2, characterized in that, The connecting cylinder (12) has a radial screw hole (14), and the set screw (15) is screwed into the radial screw hole (14) and abuts against the output shaft of the power device (3).

4. A bolt driver according to claim 3, characterized in that, The power unit (3) includes a motor (31) which is fixed on a bracket (32).

5. A bolt driver according to claim 1, characterized in that, The driver connection part (1) includes a main body connection seat (11) and a clamping shaft (16). The clamping shaft (16) is fixedly disposed on the main body connection seat (11), and the driver connection part (1) is fixedly installed on the clamp (5) of the power device (3) through the clamping shaft (16).

6. A bolt driver according to claim 4 or 5, characterized in that, The driving friction pad (4) has a positioning groove (41) at its center.

7. A bolt driver according to claim 6, characterized in that, The positioning groove (41) wall of the driving friction pad (4) is provided with friction texture (42).

8. A bolt driver according to claim 7, characterized in that, The driving friction pad (4) is interference-fitted with the receiving cavity (21).

9. A bolt driver according to claim 8, characterized in that, The main body connecting seat (11) is provided with a through hole (17).

10. A bolt driver according to claim 9, characterized in that, The main body connector (11) and the driver body (2) are connected by threads or integrally formed.

Images