Reducing mechanism of electric wrench

Abstract

The utility model discloses a reducing mechanism of an electric wrench, which relates to the technical field of electric wrenches and comprises a driving motor, a front shell and a reducing mechanism shell, the output end of the driving motor is fixedly connected with a motor output shaft, and a driving gear is fixedly sleeved outside the motor output shaft. A first speed reduction rotating disc and a second speed reduction rotating disc which are meshed with each other are installed in the speed reduction mechanism shell, equidistant first planet wheel sets are fixedly installed on the periphery of the surface of one side of the first speed reduction rotating disc, and a driven gear is fixedly connected to the center surface of the other side, away from the driving gear, of the first speed reduction rotating disc. Equidistant second planet wheel sets are fixedly installed on the periphery of the surface of the side, close to the first speed reduction rotating disc, of the second speed reduction rotating disc, a transmission main roller is sleeved with the center of the other end, away from the second planet wheel sets, of the second speed reduction rotating disc, the other end of the transmission main roller is sleeved with an electric wrench output shaft, and the electric wrench output shaft penetrates out of the front shell; and the effects of reducing the working current and improving the use performance are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wrenches, in particular to a speed reduction mechanism of an electric wrench. Background Art

[0002] Electric wrenches are handheld electric tools for loading and unloading threaded connections. They are widely used in assembly work in manufacturing industries such as automobiles, tractors, motors and electrical appliances, power machinery, valves, water pumps, and textile machinery. In chemical, cement prefabricated parts, and plastic molding operations, they are used for assembly and disassembly of vacuum tanks, reactors, cement templates, and demolding of threaded plastic parts in the production process. They can also be used in railways, bridges, construction and other projects to install, repair, and replace structures such as cement sleepers, truss nodes, and angle steel scaffolding. The working principle of an electric wrench is similar to that of an electric motor, which mainly converts electrical energy into mechanical energy to drive the wrench to work. The main components of an electric wrench include a motor, a reducer, a transmission mechanism, a torque control part, and a housing.

[0003] The speed reducer is an important part of the electric wrench. It can convert the high-speed rotation of the motor into a low-speed and high-torque output, thereby meeting the torque requirements during the working process. There are many types of speed reducers, the most common ones are planetary gear reducers, helical gear reducers, etc. Different speed reducer structures have an impact on the service life, noise, efficiency, etc. of the electric wrench.

[0004] Among them, the planetary gear reducer inside the electric wrench mostly uses a set of planetary gear reduction components for reduction. However, the design of installing only one set of planetary gear reduction components not only fails to effectively reduce the working current, but also reduces the performance of the electric wrench. Utility Model Content

[0005] The purpose of the utility model is to provide a speed reduction mechanism for an electric wrench, which solves the technical problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reduction mechanism of an electric wrench, comprising a driving motor, a front housing and a reduction mechanism housing, wherein the output end of the driving motor is fixedly connected to a motor output shaft, the outside of the motor output shaft is fixedly sleeved with a driving gear, and a first reduction rotary disk and a second reduction rotary disk meshing with each other are installed inside the reduction mechanism housing, a first planetary gear set is fixedly installed with equal spacing on a circle of a surface of one side of the first reduction rotary disk, the first planetary gear set surrounds the outside of the driving gear, and the first planetary gear set is in a meshing connection relationship with the driving gear, a driven gear is fixedly connected to the center surface of the other side of the first reduction rotary disk away from the driving gear, a second planetary gear set is fixedly installed with equal spacing on a circle of a surface of the second reduction rotary disk close to the first reduction rotary disk, the second planetary gear set surrounds the outside of the driven gear, and the second planetary gear set is in a meshing connection relationship with the driven gear, a transmission main roller is sleeved on the center inside of the other end of the second reduction rotary disk away from the second planetary gear set, the other end of the transmission main roller is sleeved with an electric wrench output shaft, and the electric wrench output shaft passes through the outside of the front housing.

[0007] Optionally, a ring groove is formed in an annular shape on an inner wall of the front housing close to the output shaft of the electric wrench, and an anti-impact pad is fixedly connected to the interior of the ring groove.

[0008] Optionally, the front shell is fixedly installed with a first inner shell near the interior of the anti-impact pad, the front shell is fixedly installed with a second inner shell near the interior of the reduction mechanism shell, and the center of the first inner shell is fixedly connected with a gradient cylinder, and the angle of the gradient cylinder gradually increases from the reduction mechanism shell toward the front shell.

[0009] Optionally, an anti-impact spring is welded between the second inner shell and the first inner shell, and the anti-impact spring surrounds the outside of the gradient cylinder.

[0010] Optionally, the first reduction turntable and the second reduction turntable are fixedly mounted inside the second inner shell, and the main transmission roller passes through both side surfaces of the first inner shell and the gradient cylinder.

[0011] Optionally, a first fixing bolt is threadedly connected between the reduction mechanism housing and the drive motor.

[0012] Optionally, the outer surfaces of the front housing and the reduction mechanism housing are respectively fixedly connected with connecting groove plates, second fixing bolts are threadedly connected between the connecting groove plates, and a connecting groove sleeve plate is fixedly sleeved on the outer surface of one side of the reduction mechanism housing.

[0013] Optionally, the output shaft of the electric wrench passes through the through hole of the front shell and is sleeved with a sealing ring.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model uses the first reduction disc and the second reduction disc inside the reduction mechanism housing so that when the operator starts the drive motor, the motor output shaft of the drive motor drives the driving gear sleeved outside to drive and rotate, the driving gear is meshed with the first planetary gear set of the first reduction disc for transmission, the first planetary gear set drives the first reduction disc to perform a corresponding preliminary reduction rotation, and in the process of the driven gear of the first reduction disc driving the second planetary gear set meshed with it to rotate, a secondary reduction rotation is provided, and the second planetary gear set then drives the second reduction disc to perform a rotational movement after reduction, and finally, the second reduction disc drives the transmission main roller and the output shaft of the electric wrench, and under the reduction drive of the first planetary gear set and the second planetary gear set of the first reduction disc and the second reduction disc, the reduction mechanism achieves the effect of reducing the working current and increasing the performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the structure of the utility model;

[0017] Figure 2 It is a front cross-sectional view of the structure of the utility model;

[0018] Figure 3 For this utility model Figure 2 A magnified schematic diagram of the structure at center A;

[0019] Figure 4 This is a cross section of some structures in the utility model Figure 1 ;

[0020] Figure 5 This is a cross section of some structures in the utility model Figure 2 .

[0021] In the figure: 1-driving motor, 2-front housing, 3-reduction mechanism housing, 4-connecting groove plate, 5-second stabilizing bolt, 6-second inner housing, 7-first inner housing, 8-motor output shaft, 9-driving gear, 10-first reduction turntable, 11-first planetary gear set, 12-driven gear, 13-second reduction turntable, 14-second planetary gear set, 15-transmission main roller, 16-electric wrench output shaft, 17-sealing ring, 18-gradient cylinder, 19-anti-impact spring, 20-first stabilizing bolt, 21-connecting groove sleeve, 22-ring groove, 23-anti-impact pad. DETAILED DESCRIPTION

[0022] 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.

[0023] For example, see Figures 1 to 5 The utility model provides a reduction mechanism of an electric wrench, comprising a driving motor 1, a front housing 2 and a reduction mechanism housing 3. The output end of the driving motor 1 is fixedly connected with a motor output shaft 8, and the outside of the motor output shaft 8 is fixedly sleeved with a driving gear 9. The interior of the reduction mechanism housing 3 is provided with a first reduction rotating disk 10 and a second reduction rotating disk 13 meshing with each other. A first planetary gear set 11 is fixedly installed with equal spacing on one side surface of the first reduction rotating disk 10. The first planetary gear set 11 surrounds the outside of the driving gear 9, and the first planetary gear set 11 is in meshing connection with the driving gear 9. The first reduction rotating disk 10 is provided with a first planetary gear set 11, and the first planetary gear set 11 is provided with a first planetary gear set 11. The first planetary gear set 11 surrounds the outside of the driving gear 9, and the first planetary gear set 11 is in meshing connection with the driving gear 9. A driven gear 12 is fixedly connected to the central surface of the other side of the turntable 10 away from the driving gear 9, and a second planetary gear set 14 is fixedly installed with equal spacing around the surface of one side of the second reduction turntable 13 close to the first reduction turntable 10. The second planetary gear set 14 surrounds the outside of the driven gear 12, and the second planetary gear set 14 is in a meshing connection with the driven gear 12. A transmission main roller 15 is sleeved on the central inner part of the other end of the second reduction turntable 13 away from the second planetary gear set 14, and an electric wrench output shaft 16 is sleeved on the other end of the transmission main roller 15, and the electric wrench output shaft 16 passes through the outside of the front housing 2.

[0024] The output shaft 16 of the electric wrench passes through the through hole of the front housing 2 and is sleeved with a sealing ring 17 .

[0025] More specifically, in the present embodiment, when the operator starts the driving motor 1, the motor output shaft 8 of the driving motor 1 drives the driving gear 9 sleeved outside to drive and rotate, and the driving gear 9 is meshed with the first planetary gear set 11 of the first reduction turntable 10 for transmission, and the first planetary gear set 11 drives the first reduction turntable 10 to perform a corresponding preliminary reduction rotation, and the driven gear 12 of the first reduction turntable 10 drives the second planetary gear set 14 meshed therewith to rotate, providing a secondary reduction rotation, and the second planetary gear set 14 then drives the second reduction turntable 13 to perform a rotational movement after reduction, and finally, the second reduction turntable 13 drives the transmission main roller 15 and the electric wrench output shaft 16, and under the reduction drive of the first planetary gear set 11 and the second planetary gear set 14 of the first reduction turntable 10 and the second reduction turntable 13, the reduction mechanism reduces the working current and increases the use performance, and in this process, the sealing ring 17 provides the sealing purpose in the operation.

[0026] Furthermore, a ring groove 22 is formed in an annular shape on the inner wall of the front housing 2 near the output shaft 16 of the electric wrench, and an anti-impact pad 23 is fixedly connected inside the ring groove 22 .

[0027] The front shell 2 is fixedly connected to the first inner shell 7 near the anti-impact pad 23, the front shell 2 is fixedly connected to the second inner shell 6 near the reduction mechanism shell 3, the center of the first inner shell 7 is fixedly connected to the gradient cylinder 18, the angle of the gradient cylinder 18 gradually increases from the reduction mechanism shell 3 to the front shell 2, the first reduction turntable 10 and the second reduction turntable 13 are fixedly installed inside the second inner shell 6, the transmission main roller 15 passes through the two side surfaces of the first inner shell 7 and the gradient cylinder 18, an anti-impact spring 19 is welded between the second inner shell 6 and the first inner shell 7, and the anti-impact spring 19 surrounds the outside of the gradient cylinder 18.

[0028] It is worth mentioning that, firstly, the anti-impact spring 19 between the second inner shell 6 and the first inner shell 7 will gradually increase the angle along the slope cylinder 18 from the reduction mechanism shell 3 to the front shell 2, thereby providing the purpose of anti-impact during the driving process of the transmission main roller 15; secondly, the anti-impact pad 23 inside the annular groove 22 can provide a secondary anti-impact effect for the driving of the transmission main roller 15.

[0029] Embodiment 2, based on the above embodiment:

[0030] Furthermore, a first fixing bolt 20 is threadedly connected between the reduction mechanism housing 3 and the driving motor 1, connecting groove plates 4 are respectively fixedly connected to the outer surfaces of the front housing 2 and the reduction mechanism housing 3, second fixing bolts 5 are threadedly connected between the connecting groove plates 4, and a connecting groove sleeve plate 21 is fixedly sleeved on the outer surface of one side of the reduction mechanism housing 3.

[0031] More specifically, in this embodiment, the operator can first use the first fixing bolt 20 to firmly install the reduction mechanism housing 3 on one side of the drive motor 1, and then align and fit the front housing 2 and the connecting groove plate 4 of the reduction mechanism housing 3, and firmly connect the front housing 2 and the reduction mechanism housing 3 through the second fixing bolt 5. Finally, other components can be connected and installed through the connecting groove sleeve plate 21.

[0032] 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. A speed reduction mechanism for an electric wrench, comprising a drive motor (1), a front housing (2) and a speed reduction mechanism housing (3), characterized in that: The output end of the driving motor (1) is fixedly connected to a motor output shaft (8), the outside of the motor output shaft (8) is fixedly sleeved with a driving gear (9), the interior of the reduction mechanism housing (3) is provided with a first reduction rotating disk (10) and a second reduction rotating disk (13) meshing with each other, a first planetary gear set (11) is fixedly installed on one side of the surface of the first reduction rotating disk (10) at equal intervals, the first planetary gear set (11) surrounds the outside of the driving gear (9), and the first planetary gear set (11) is in meshing connection with the driving gear (9), and the first reduction rotating disk (10) is away from the center surface of the other side of the driving gear (9). A driven gear (12) is fixedly connected to the second reduction disc (13); a second planetary gear set (14) is fixedly installed with equal spacing around a circle of the surface of one side of the second reduction disc (13) close to the first reduction disc (10); the second planetary gear set (14) surrounds the outside of the driven gear (12), and the second planetary gear set (14) and the driven gear (12) are in a meshing connection relationship; a transmission main roller (15) is sleeved on the center of the other end of the second reduction disc (13) away from the second planetary gear set (14); the other end of the transmission main roller (15) is sleeved on an electric wrench output shaft (16), and the electric wrench output shaft (16) passes through the outside of the front housing (2).

2. The speed reduction mechanism of an electric wrench according to claim 1, characterized in that: An annular groove (22) is formed in an annular shape on the inner wall of the front housing (2) near the output shaft (16) of the electric wrench, and an anti-impact pad (23) is fixedly connected inside the annular groove (22).

3. The speed reduction mechanism of an electric wrench according to claim 2, characterized in that: The front housing (2) is fixedly connected to a first inner housing (7) near the interior of the anti-impact pad (23); the front housing (2) is fixedly connected to a second inner housing (6) near the interior of the reduction mechanism housing (3); the center of the first inner housing (7) is fixedly connected to a gradient cylinder (18); the angle of the gradient cylinder (18) gradually increases from the reduction mechanism housing (3) toward the front housing (2).

4. The speed reduction mechanism of an electric wrench according to claim 3, characterized in that: An anti-impact spring (19) is welded between the second inner shell (6) and the first inner shell (7), and the anti-impact spring (19) surrounds the outside of the gradient cylinder (18).

5. The speed reduction mechanism of an electric wrench according to claim 4, characterized in that: The first deceleration turntable (10) and the second deceleration turntable (13) are fixedly mounted inside the second inner shell (6), and the main transmission roller (15) passes through both side surfaces of the first inner shell (7) and the gradient cylinder (18).

6. The speed reduction mechanism of an electric wrench according to claim 1, characterized in that: A first stabilizing bolt (20) is threadedly connected between the speed reduction mechanism housing (3) and the drive motor (1).

7. The speed reduction mechanism of an electric wrench according to claim 6, characterized in that: The outer surfaces of the front housing (2) and the reduction mechanism housing (3) that fit together are respectively fixedly connected with connection slot plates (4), the connection slot plates (4) are threadedly connected with second fixing bolts (5), and a connection slot sleeve plate (21) is fixedly sleeved on the outer surface of one side of the reduction mechanism housing (3).

8. The speed reduction mechanism of an electric wrench according to claim 1, characterized in that: The electric wrench output shaft (16) passes through the through hole of the front housing (2) and is sleeved with a sealing ring (17).

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