Electric power tool gear box motor

Abstract

The utility model discloses a kind of electric tool class gear box motor, including motor body, the outside sleeve joint installation of motor body one end flange shell, the inside of flange shell is clamped and is installed inner ring gear, the inside meshing of inner ring gear has three planet gears, one side of three planet gears is installed with planet carrier, the inside clamping and installation of planet carrier has output shaft;The output end of motor body can drive shaft tooth to rotate by being set, to drive three planet gears to rotate, under the action of inner ring gear, three planet gears simultaneously rotate along the inside of inner ring gear, to drive planet carrier to rotate, finally realize drive output shaft to rotate, finally the high-speed rotary motion of motor body is converted into the low-speed, large torque rotary motion of output shaft, to accurately realize the required speed reduction output function of mechanical transmission system, meet the matching demand of various industrial equipment, automation device or medical instrument to power output speed and torque.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a gearbox motor for power tools. Background Technology

[0002] In many fields such as industrial production, construction, and home repair, power tools have become indispensable work equipment due to their efficient and convenient power output characteristics. As the core power component of power tools, the gearbox motor's performance directly determines the power tool's working efficiency, output torque, operational stability, and service life. The reduction transmission mechanism, as a key component of the gearbox motor, has its transmission accuracy, power loss control, and structural compactness as core factors affecting the overall performance of the power tool.

[0003] In existing power tool gearbox motors, the reduction transmission mechanism is mostly designed using structures such as multi-stage cylindrical gear meshing, worm gear transmission, or planetary gear transmission. Among these, while multi-stage cylindrical gear meshing has the advantages of simple manufacturing process and low cost, it suffers from problems such as limited transmission ratio, large size, and significant energy loss during power transmission, making it difficult to meet the power tool's requirements for miniaturization and high torque output. Although worm gear transmission can achieve a large reduction ratio and self-locking function, its transmission efficiency is relatively low, and the worm gear is prone to wear. After long-term use, it is easy to experience increased transmission backlash and decreased output accuracy, affecting the operational stability of the power tool. Utility Model Content

[0004] The purpose of this utility model is to provide a gearbox motor for power tools to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gearbox motor for power tools, comprising a motor body, a flange shell sleeved on the outer side of one end of the motor body, an internal gear ring snapped into the inside of the flange shell, three planetary teeth meshing inside the internal gear ring, a planet carrier mounted on one side of the three planetary teeth, and an output shaft snapped into the inside of the planet carrier.

[0006] Preferably, three pins are fixedly installed on one side of the planetary carrier, and the three pins are respectively inserted into the inner side of the three planetary teeth, and the outer sides of the three planetary teeth are engaged with the inner side of the internal gear ring.

[0007] Preferably, the output end of the motor body is fixedly connected to a shaft tooth, and the shaft tooth is inserted and installed at the center of three planetary teeth, with the output ends of the three planetary teeth meshing with the outer side of the shaft tooth.

[0008] Preferably, screws are threaded to all four corners of the flange shell, and the motor body and the flange shell are fixedly connected by screws.

[0009] Preferably, an O-ring is installed inside the flange housing, a retaining ring is installed inside the flange housing, and an internal toothed ring is installed between the O-ring and the retaining ring.

[0010] Preferably, a cover is fixedly installed on one side of the flange shell by bolts, a ball bearing is fixedly installed inside the cover, and an oil seal is fixedly installed on one side of the cover, with the oil seal located outside the ball bearing.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: the output end of the motor body can drive the shaft teeth to rotate, thereby driving the three planetary teeth to rotate. Under the action of the internal gear ring, the three planetary teeth rotate along the inner side of the internal gear ring while rotating on their own, thereby driving the planet carrier to rotate, and finally driving the output shaft to rotate. This transforms the high-speed rotational motion of the motor body into the low-speed, high-torque rotational motion of the output shaft, thereby accurately realizing the deceleration output function required by the mechanical transmission system and meeting the matching requirements of various industrial equipment, automation devices or medical devices for power output speed and torque. Attached Figure Description Figure 1 This is a three-dimensional structural diagram of the present invention.

[0012] Figure 2 This is a schematic diagram of the disassembled three-dimensional structure of this utility model.

[0013] Figure 3 This is a partial cross-sectional structural diagram of the present invention.

[0014] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0015] In the diagram: 1. Flange housing; 2. Internal gear ring; 3. Planetary gear; 4. Planetary carrier; 5. Output shaft; 6. Screw; 7. Cover; 8. Ball bearing; 9. Oil seal; 10. Snap ring; 11. O-ring seal; 12. Motor body. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-4This utility model provides a technical solution: a gearbox motor for power tools, including a motor body 12, a flange shell 1 sleeved on the outer side of one end of the motor body 12, an internal gear ring 2 rotatably mounted inside the flange shell 1, three planetary teeth 3 meshing inside the internal gear ring 2, a planet carrier 4 mounted on one side of the three planetary teeth 3, an output shaft 5 snapped onto the inside of the planet carrier 4, three pins fixedly mounted on one side of the planet carrier 4, and the three pins respectively inserted into the inner side of the three planetary teeth 3, the outer sides of the three planetary teeth 3 meshing with the inner side of the internal gear ring 2, a shaft tooth fixedly connected to the output end of the motor body 12, and the shaft tooth inserted into the center of the three planetary teeth 3, the output end of the three planetary teeth 3 meshing with the outer side of the shaft tooth, an O-ring seal 11 installed inside the flange shell 1, a retaining ring 10 installed inside the flange shell 1, and the internal gear ring 2 installed between the O-ring seal 11 and the retaining ring 10.

[0018] The working principle of the above technical solution is as follows: After the external power supply is connected, the output end of the motor body 12 can drive the shaft teeth to rotate, thereby driving the three planetary teeth 3 to rotate. Under the action of the internal gear ring 2, the three planetary teeth 3 will rotate along the inner side of the internal gear ring 2 while rotating on their own, thereby driving the planet carrier 4 to rotate, and finally driving the output shaft 5 to rotate. In the end, the high-speed rotational motion of the motor body is converted into the low-speed, high-torque rotational motion of the output shaft 5, thereby accurately realizing the deceleration output function required by the mechanical transmission system and meeting the matching requirements of various industrial equipment, automation devices or medical devices for power output speed and torque.

[0019] In another implementation scheme, such as Figures 1-4 As shown, screws 6 are threaded to all four corners of the flange shell 1, and the motor body 12 is fixedly connected to the flange shell 1 by screws 6.

[0020] The motor body 12 can be assembled and connected to the flange shell 1 using the screws 6 provided, making assembly convenient and disassembly simple.

[0021] In another implementation scheme, such as Figures 1-4 As shown, a cover 7 is fixedly installed on one side of the flange shell 1 by bolts. A ball bearing 8 is fixedly installed inside the cover 7. An oil seal 9 is fixedly installed on one side of the cover 7, and the oil seal 9 is located outside the ball bearing 8.

[0022] The cover 7 can seal the opening of the flange shell 1 and protect the inside of the flange shell 1. In addition, the ball bearing 8 can ensure the stability of the output shaft 5 rotating inside the cover 7, and the oil seal 9 can ensure the sealing of the ball bearing 8.

[0023] Working principle: After connecting to an external power source, the output end of the motor body 12 can drive the shaft teeth to rotate, thereby driving the three planetary teeth 3 to rotate. Under the action of the internal gear ring 2, the three planetary teeth 3 rotate along the inner side of the internal gear ring 2 while rotating on their own, thereby driving the planet carrier 4 to rotate, and finally driving the output shaft 5 to rotate. This converts the high-speed rotational motion of the motor body into the low-speed, high-torque rotational motion of the output shaft 5, thereby accurately realizing the deceleration output function required by the mechanical transmission system and meeting the matching requirements of power output speed and torque for various industrial equipment, automation devices or medical devices. The motor body 12 and the flange shell 1 can be assembled and connected by the screws 6. Assembly is convenient and disassembly is simple. The cover 7 can seal the opening of the flange shell 1 and protect the inside of the flange shell 1. In addition, the ball bearing 8 can ensure the stability of the output shaft 5 rotating inside the cover 7, and the oil seal 9 can ensure the sealing of the ball bearing 8.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gearbox motor for power tools, comprising a motor body (12), characterized in that: A flange shell (1) is sleeved on the outer side of one end of the motor body (12). An internal gear ring (2) is snapped into the inside of the flange shell (1). Three planetary teeth (3) are meshed inside the internal gear ring (2). A planet carrier (4) is installed on one side of the three planetary teeth (3). An output shaft (5) is snapped into the inside of the planet carrier (4).

2. The gearbox motor for power tools according to claim 1, characterized in that: Three pins are fixedly installed on one side of the planetary carrier (4), and the three pins are respectively inserted into the inner side of the three planetary teeth (3). The outer sides of the three planetary teeth (3) are engaged with the inner side of the internal gear ring (2).

3. The gearbox motor for power tools according to claim 2, characterized in that: The output end of the motor body (12) is fixedly connected with a shaft tooth, and the shaft tooth is inserted and installed at the center of three planetary teeth (3). The output ends of the three planetary teeth (3) mesh with the outer side of the shaft tooth.

4. The gearbox motor for power tools according to claim 1, characterized in that: The four corners of the flange shell (1) are threaded with screws (6), and the motor body (12) and the flange shell (1) are fixedly connected by screws (6).

5. A gearbox motor for power tools according to claim 4, characterized in that: An O-ring (11) is installed inside the flange housing (1), a snap ring (10) is installed inside the flange housing (1), and an internal toothed ring (2) is installed between the O-ring (11) and the snap ring (10).

6. A gearbox motor for power tools according to claim 1, characterized in that: A cover (7) is fixedly installed on one side of the flange shell (1) by bolts. A ball bearing (8) is fixedly installed inside the cover (7). An oil seal (9) is fixedly installed on one side of the cover (7), and the oil seal (9) is located outside the ball bearing (8).

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