Electric screwdriver with three torsion sections

Abstract

The utility model discloses an electric screw driver with three sections of torsion, which comprises an electric screw driver main body, the electric screw driver main body consists of a gearbox and a casing, the electric screw driver further comprises a quick supplement mechanism, the quick supplement mechanism comprises a ring box arranged at the joint of the casing and the gearbox, the inner wall of the ring box is provided with a ring groove, and the inner wall of the ring box is provided with a spring; liquid holes which are distributed at equal intervals are formed in the inner side wall of the annular box, the liquid holes are communicated with the interior of the annular groove, a liquid inlet hole is formed in the outer wall of one side of the annular box, a rubber plug is arranged on the inner wall of the liquid inlet hole, and a speed reduction assembly is arranged in the gearbox; and the auxiliary locking mechanism is arranged on the outer side wall of the gearbox. The electric screwdriver with the three torsion sections has the technical effects that the supplementary lubrication efficiency is improved, and the use process is stable.

Description

Technical Field

[0001] This utility model relates to the field of electric screwdriver technology, and in particular to an electric screwdriver with three-stage torque. Background Technology

[0002] Electric screwdrivers, also known as power screwdrivers or electric screwdrivers, are power tools used to tighten and loosen screws and nuts. They are mainly used on assembly lines and are one of the essential tools for most manufacturing companies. They are widely used in industries such as aviation, automobiles, machinery, and electrical appliances, and play a significant role in improving labor productivity and reducing the labor intensity of workers.

[0003] However, when using a traditional electric screwdriver with three torque settings, the gear reduction structure inside the gearbox lacks regular maintenance. With frequent use, the gear shaft inside the reduction structure wears out severely, which can easily cause failure of the gearbox's internal reduction structure.

[0004] For example, in some processing workshops, electric screwdrivers are commonly used on production lines for screwing. However, with the high intensity of work in the factory area, the maintenance frequency of electric screwdrivers is very high, and the process of adding lubricating oil to the gearbox is also relatively complicated, which affects efficiency. Utility Model Content

[0005] This utility model discloses an electric screwdriver with three-stage torque, aiming to solve the technical problem that traditional electric screwdrivers with three-stage torque lack regular maintenance of the gear reduction structure inside the gearbox. With high-frequency use, the gear shaft inside the reduction structure wears severely, which easily causes failure of the gearbox's internal reduction structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electric screwdriver with three-stage torque includes a screwdriver body, which is composed of a gearbox and a housing. It further includes: a quick-fill mechanism: the quick-fill mechanism includes an annular box disposed at the connection between the housing and the gearbox; an annular groove is provided on the inner wall of the annular box; liquid holes are evenly distributed on the inner side wall of the annular box, and the liquid holes communicate with the interior of the annular groove; a liquid inlet is provided on one outer wall of the annular box; a rubber stopper is provided on the inner wall of the liquid inlet; and a speed reduction assembly is provided inside the gearbox; and an auxiliary locking mechanism: the auxiliary locking mechanism is disposed on the outer side wall of the gearbox.

[0008] In this solution, a quick replenishment mechanism allows for the rapid addition of lubricating oil to the gearbox via the inlet port. In practical use, simply open the rubber stopper and use an injection tool to fill the lubricating oil into the ring groove inside the ring box through the inlet port. The lubricating oil then disperses through the liquid holes in the ring groove, providing quick and comprehensive protection for the deceleration components inside the gearbox. It is convenient to use and the replenishment process is simple.

[0009] In a preferred embodiment, the reduction assembly includes a central gear disposed inside the gearbox and a gear ring located on the inner sidewall of the gearbox. Three planetary gears are also disposed between the central gear and the gear ring, and the planetary gears mesh with the central gear and the gear ring. The central gear is provided with a slot. A motor is disposed on the inner wall of the housing. One end of the output shaft of the motor is connected to an output head, which is adapted to the slot. The top of the housing is provided with a rear end cover, and a connector is provided inside the rear end cover.

[0010] When connected to electricity, current is supplied to the motor inside the housing through the connector. Under the action of the motor, the output head drives the central gear to rotate, and then the whole drives the reduction assembly. After being reduced by the reduction assembly, the driving force is transmitted to the transmission shaft (not shown in the figure) on the inner wall of the gearbox, and finally used to stabilize the rotation of the cutter head. It should be noted that in actual use, the reduction assembly can be multi-stage reduction, but only this solution is shown.

[0011] In a preferred embodiment, the auxiliary locking mechanism includes two symmetrically arranged locking holes disposed on the outer wall of the gearbox, and an elastic buckle is provided at the screw connection between the housing and the gearbox, the elastic buckle being adapted to the locking holes.

[0012] In actual use, once the gearbox and housing are fully locked, the elastic buckle will securely engage inside the locking hole. Before opening the connection between the gearbox and housing again, the elastic buckle needs to be pressed to disengage it from the locking hole, and then the connection can be opened by loosening the screws, which improves the stability of the connection locking process.

[0013] As described above, an electric screwdriver with three torque levels includes a screwdriver body, which is composed of a gearbox and a housing. It further includes: a quick-replenishment mechanism: the quick-replenishment mechanism includes an annular box located at the connection between the housing and the gearbox; an annular groove is provided on the inner wall of the annular box; and evenly spaced liquid holes are formed on the inner side wall of the annular box, the liquid holes communicating with the interior of the annular groove. A liquid inlet is provided on one outer wall of the annular box, and a rubber stopper is provided on the inner wall of the liquid inlet. A speed reduction assembly is provided inside the gearbox. An auxiliary locking mechanism is located on the outer side wall of the gearbox. The electric screwdriver with three torque levels provided by this invention has the technical effects of improving lubrication efficiency and ensuring stable operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an electric screwdriver with three-stage torque proposed in this utility model.

[0015] Figure 2This is a schematic diagram of a partially disassembled structure of an electric screwdriver with three-stage torque proposed in this utility model.

[0016] Figure 3 This is a schematic diagram of the tooth box mounting structure of an electric screwdriver with three-stage torque proposed in this utility model.

[0017] Figure 4 For the present utility model in Figure 3 A magnified structural diagram of point A in the middle.

[0018] In the attached diagram: 1. Housing; 2. Gearbox; 3. Torque adjusting ring; 4. Rear end cover; 5. Fastening cap; 6. Center gear; 7. Planetary gear; 8. Output head; 9. Ring box; 10. Liquid hole; 11. Rubber plug; 12. Locking hole. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] The electric screwdriver with three-stage torque disclosed in this utility model is mainly used in scenarios where traditional electric screwdrivers with three-stage torque lack regular maintenance of the gear reduction structure inside the gearbox. With high-frequency use, the gear shaft inside the reduction structure wears severely, which can easily cause failure of the gearbox's internal reduction structure.

[0021] Reference Figure 1 , Figure 3 and Figure 4 An electric screwdriver with three-stage torque includes a screwdriver body, which is composed of a gearbox 2 and a housing 1. It also includes: a quick-replenishment mechanism: the quick-replenishment mechanism includes an annular box 9 located at the connection between the housing 1 and the gearbox 2. The annular box 9 has an annular groove on its inner wall and equally spaced liquid holes 10 on its inner side wall, which communicate with the interior of the annular groove. An inlet hole is located on one outer side wall of the annular box 9, and a rubber stopper 11 is located on the inner wall of the inlet hole. A speed reduction assembly is located inside the gearbox 2. An auxiliary locking mechanism is located on the outer side wall of the gearbox 2.

[0022] Specifically, the quick replenishment mechanism allows for the rapid addition of lubricating oil into the gearbox 2 via the inlet port. In actual use, simply open the rubber stopper 11 and use an injection tool to fill the lubricating oil into the annular groove inside the ring box 9 through the inlet port. The lubricating oil then disperses into the ring through the liquid hole 10 in the annular groove, providing quick and comprehensive protection for the deceleration components inside the gearbox 2. It is convenient to use and the replenishment process is simple.

[0023] The gearbox 2 and the housing 1 are connected to each other by threads, and the ring box 9 is clamped between the gearbox 2 and the housing 1. In actual use, the upper and lower sides of the ring box 9 are sealed with rubber gaskets. When the gearbox 2 and the housing 1 are screwed together, the ring box 9 can play a certain supporting role and has a certain sealing effect to prevent lubricating oil from leaking out from the connection.

[0024] For example, the frequent disassembly and reassembly of the housing 1 and gearbox 2 for lubrication not only creates sealing problems, but also allows external contaminants to easily enter the reduction gear assembly, causing corrosion of the internal reduction gear assembly.

[0025] In this solution, the quick replenishment mechanism described above allows for lubrication of the electric screwdriver body without disassembly, resulting in high efficiency and good protection.

[0026] Reference Figure 1 and Figure 2 In a preferred embodiment, the reduction assembly includes a central gear 6 disposed inside the gearbox 2 and a gear ring located on the inner side wall of the gearbox 2. Three planetary gears 7 are also provided between the central gear 6 and the gear ring, and the planetary gears 7 mesh with the central gear 6 and the gear ring. The central gear 6 is provided with a slot. A motor is provided on the inner wall of the housing 1. One end of the output shaft of the motor is connected to an output head 8, which is adapted to the slot. The top of the housing 1 is provided with a rear end cover 4, and a connector is provided inside the rear end cover 4.

[0027] When connected to electricity, the current will supply power to the motor inside the housing 1 through the connector. Under the action of the motor, the output head 8 will drive the central gear 6 to rotate, and then the whole drive the reduction assembly to work. After being reduced by the reduction assembly, the driving force is transmitted to the transmission shaft (not shown in the figure) on the inner wall of the gear box 2, and finally used to stabilize the rotation of the cutter head.

[0028] It should be noted that in actual use, the deceleration component can be multi-stage deceleration. This solution only shows a single-stage deceleration. Also, the electric screwdriver body in this solution is mainly used in the screw-driving production line, so the electric screwdriver body alone does not have a start switch. The start switch is set up in conjunction with the screw-driving equipment.

[0029] Reference Figure 1 and Figure 4In a preferred embodiment, the auxiliary locking mechanism includes two symmetrically arranged locking holes 12 disposed on the outer wall of the gearbox 2, and an elastic buckle is provided at the screw connection between the housing 1 and the gearbox 2, the elastic buckle being adapted to the locking holes 12.

[0030] In actual use, after the gearbox 2 and the housing 1 are fully locked, the elastic buckle will be stably locked into the inside of the locking hole 12. Before opening the connection between the gearbox 2 and the housing 1 again, the elastic buckle needs to be pressed to disengage it from the inside of the locking hole 12, and then the connection can be opened by loosening the screw, which improves the stability of the connection locking process.

[0031] Reference Figure 1 , Figure 2 and Figure 3 In a preferred embodiment, a torque adjusting ring 3 is also provided on the outer wall of the gearbox 2, and a fastening cap 5 is installed at the bottom of the gearbox 2, with a blade clamped on the inner wall of the fastening cap 5.

[0032] Among them, the torque adjustment ring 3 of this device has three torque adjustment ranges.

[0033] Working principle: In actual use, simply open the rubber stopper 11 and use an injection tool to fill the lubricating oil into the ring groove inside the ring box 9 through the liquid inlet hole. Then, it is dispersed into the ring through the liquid hole 10 in the ring groove. Moreover, the ring box 9 between the gear box 2 and the housing 1 is covered with rubber gaskets on both the top and bottom, which can prevent the lubricating oil added inside from leaking out during the tightening process of the gear box 2 and the housing 1.

[0034] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. An electric screwdriver with three-stage torque, comprising a screwdriver body, said screwdriver body being composed of a gearbox (2) and a housing (1), characterized in that, Also includes: Rapid replenishment mechanism: The rapid replenishment mechanism includes an annular box (9) located at the connection between the housing (1) and the gearbox (2). The inner wall of the annular box (9) is provided with an annular groove. The inner side wall of the annular box (9) is provided with liquid holes (10) distributed at equal intervals. The liquid holes (10) are connected to the interior of the annular groove. The outer side wall of the annular box (9) is provided with a liquid inlet hole. The inner wall of the liquid inlet hole is provided with a rubber stopper (11). The gearbox (2) is provided with a deceleration assembly inside. Auxiliary locking mechanism: The auxiliary locking mechanism is disposed on the outer side wall of the gearbox (2).

2. The electric screwdriver with three-stage torque according to claim 1, characterized in that, The gearbox (2) and the housing (1) are connected to each other by threads, and the ring box (9) is clamped between the gearbox (2) and the housing (1).

3. The electric screwdriver with three-stage torque according to claim 2, characterized in that, The deceleration assembly includes a central gear (6) disposed inside the gearbox (2) and a gear ring located on the inner side wall of the gearbox (2). Three planetary gears (7) are also provided between the central gear (6) and the gear ring, and the planetary gears (7) mesh with the central gear (6) and the gear ring.

4. An electric screwdriver with three-stage torque according to claim 3, characterized in that, The central gear (6) is provided with a slot, the inner wall of the housing (1) is provided with a motor, one end of the output shaft of the motor is connected to an output head (8), the output head (8) is adapted to the slot, the top of the housing (1) is provided with a rear end cover (4), and the interior of the rear end cover (4) is provided with a connector.

5. An electric screwdriver with three-stage torque according to claim 1, characterized in that, The auxiliary locking mechanism includes two symmetrically arranged locking holes (12) on the outer wall of the gearbox (2). The screw joint between the housing (1) and the gearbox (2) is provided with an elastic buckle, which is adapted to the locking holes (12).

6. An electric screwdriver with three-stage torque according to claim 1, characterized in that, The outer wall of the gearbox (2) is also provided with a torque adjustment ring (3).

7. An electric screwdriver with three-stage torque according to claim 6, characterized in that, The bottom of the tooth box (2) is fitted with a fastening cap (5), and the inner wall of the fastening cap (5) holds the cutting head.

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