Gearbox structure of large-torque gear reducer motor
By using an open gearbox structure and fan-cooled design, combined with worm gears, double gears, and high-output gears, the problems of high cost, large size, and easy damage of high-torque gearboxes are solved, resulting in a gearbox design that is compact, low-cost, and highly durable.
Patent Information
- Application Number
- CN202422908810.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Existing high-torque geared motor gearboxes are costly, bulky, and prone to functional defects.
An open gearbox structure is formed by a bracket and mounting plate, which combines a primary input worm gear, a double gear, and a secondary output gear with a larger outer diameter. With the help of oil-impregnated bearings, the gears are cooled by a fan blade to reduce the motor speed and lower costs.
While maintaining high torque, the size of the motor gearbox is reduced, costs are lowered, gear strength and lifespan are improved, and plastic gears are prevented from melting and slipping due to excessive temperature.
Smart Images
Figure CN223498627U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a gearbox structure, and more specifically, to a gearbox structure for a high-torque gear reducer motor. Background Technology
[0002] Most existing high-torque geared motor gearboxes use a high-power motor with a single-stage reduction via a worm gear. Due to the high torque, this requires high-quality gear materials, resulting in higher costs. Alternatively, double gears can be used, which are complex and costly, requiring a large gear module. This results in a smaller reduction ratio for a gearbox of the same size, necessitating a larger motor torque. Consequently, the motor becomes larger, requiring more materials, leading to higher costs, larger space requirements, and increased gear wear, which can cause various problems such as gear loss and functional defects. Utility Model Content
[0003] The purpose of this utility model is to address the shortcomings of the prior art by providing a simple, compact, quick-installation, low-cost, and effective high-torque gear reducer motor gearbox structure.
[0004] The technical solution of this utility model is implemented as follows: a gearbox structure for a high-torque gear reducer motor includes a bracket connected to the front end of the motor housing, mounting plates that are parallel to each other and spaced apart are connected to the bracket, and a double gear is rotatably connected between the two mounting plates. The secondary input gear of the double gear meshes with the primary input worm on the motor power output shaft, and the free end of the primary input worm extends to the outside of the double gear and is provided with a fan blade that blows air toward the gear.
[0005] The first-stage output gear of the double gear meshes with a second-stage output gear whose outer diameter is larger than that of the first-stage output gear. The center of the second-stage output gear is fixedly connected to an output shaft that can be detachably connected to an external component. The outer diameter of the second-stage input gear of the double gear is larger than that of the first-stage output gear.
[0006] In the aforementioned high-torque gear reducer motor gearbox structure, the two sides of the bracket are provided with limiting steps that cooperate with the mounting plate at the end near the motor housing; a threaded hole is provided at the top of the bracket, and a limiting plate that cooperates with the top of the bracket is provided on the mounting plate. The limiting plate and the threaded hole are fixed together by screws.
[0007] In the aforementioned high-torque gear reducer motor gearbox structure, two limiting steps are symmetrically arranged on both sides of the bracket, a positioning protrusion is provided on the bracket between the two limiting steps, and a positioning notch adapted to the positioning protrusion is provided on the mounting plate.
[0008] In the aforementioned high-torque gear reducer motor gearbox structure, the bracket is provided with several oil-impregnated bearings that respectively cooperate with the double gear and the secondary output gear.
[0009] This invention, employing the aforementioned structure, reduces the motor speed through the cooperation of a primary input worm gear, a double gear, and a secondary output gear with a larger outer diameter. This effectively reduces the size of the motor gearbox while maintaining sufficient torque, thus lowering costs. Furthermore, the open gearbox structure formed by the bracket and mounting plate facilitates the installation of gears and other components, further reducing costs. The open structure, coupled with direct gear cooling via fan blades, prevents the plastic gears from melting and slipping due to excessive temperature during use, increasing gear strength and extending service life. Attached Figure Description
[0010] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings, but this does not constitute any limitation on the present invention.
[0011] Figure 1 This is a schematic diagram of the structure of this utility model;
[0012] Figure 2 This is a schematic diagram of the structure of this utility model with the surface mounting plate removed;
[0013] Figure 3 This is a schematic diagram of the mounting plate and bracket of this utility model;
[0014] Figure 4 This is a cross-sectional structural diagram of the present invention.
[0015] In the diagram: 1. Bracket; 2. Mounting plate; 3. Double gear; 4. First-stage input worm gear; 5. Second-stage output gear; 6. Output shaft; 7. Limiting step; 8. Threaded hole; 9. Limiting plate; 10. Positioning protrusion; 11. Positioning notch; 12. Oil-impregnated bearing. Detailed Implementation
[0016] See Figure 1-4As shown, this utility model discloses a high-torque gear reducer motor gearbox structure, including a bracket 1 connected to the front end of the motor housing. Parallel and spaced mounting plates 2 are connected to the bracket 1. A double gear 3 is rotatably connected between the two mounting plates 2. The secondary input gear of the double gear 3 meshes with a primary input worm gear 4 on the motor's power output shaft. The free end of the primary input worm gear 4 extends to the outside of the double gear 3 and is equipped with a fan blade that blows air towards the gear. The open gearbox structure formed by the bracket and mounting plates facilitates the installation of gears and other components, and further reduces costs. Simultaneously, the open structure, combined with direct cooling of the gears by the fan blades, prevents the plastic gears from melting and slipping due to excessive temperature during use, increasing gear strength and extending service life.
[0017] The first-stage output gear of the double gear 3 meshes with a second-stage output gear 5, whose outer diameter is larger than that of the first-stage output gear. The second-stage output gear 5 is centrally fixedly connected to an output shaft 6 or similar component that can be detachably connected to external parts. The outer diameter of the second-stage input gear of the double gear 3 is larger than that of the first-stage output gear. By coordinating the first-stage input worm, the double gear, and the larger-diameter second-stage output gear, the motor speed is reduced. This effectively reduces the size of the motor gearbox while maintaining sufficient torque, thus significantly lowering costs.
[0018] In this embodiment, preferably, each of the two sides of the bracket 1 near the motor housing is provided with a limiting step 7 that mates with the mounting plate 2; a threaded hole 8 is provided at the top of the bracket 1, and a limiting plate 9 that mates with the top of the bracket 1 is provided on the mounting plate 2. The limiting plate 9 and the threaded hole 8 are fixed together by screws. This structure facilitates the disassembly and assembly of the mounting plate, allowing for quick removal and replacement of the mounting plate for maintenance or replacement when the worm gear and gear experience wear or failure.
[0019] More preferably, two limiting steps 7 are symmetrically arranged on both sides of the bracket 1, and a positioning protrusion 10 is provided on the bracket 1 between the two limiting steps 7. A positioning notch 11 adapted to the positioning protrusion 10 is provided on the mounting plate 2. By setting the positioning protrusion and positioning notch to cooperate, stability can be provided for the end of the mounting plate, avoiding the screws from loosening and falling off due to the vibration of the mounting plate during gear operation.
[0020] In this embodiment, the bracket 1 is provided with a plurality of oil film bearings 12 that respectively cooperate with the double gear 3 and the secondary output gear 5. Oil-impregnated bearings have a low coefficient of friction, high load-bearing capacity, low cost, and low noise. Therefore, they are smaller in size and more compact in structure for the same load-bearing capacity, which can further effectively reduce the gearbox volume. Furthermore, oil-impregnated bearings have a long service life and relatively low maintenance costs, effectively reducing costs. Depending on actual usage requirements, various existing bearings can also be used to replace the oil-impregnated bearings; this is common knowledge that those skilled in the art will readily understand, and will not be elaborated upon here.
[0021] During operation, the motor provides power to the first-stage input worm gear to drive the double gear. The double gear then transmits the power to the second-stage output gear for speed reduction, which in turn drives the output shaft to rotate.
[0022] The above-described embodiments are preferred embodiments of the present utility model and are only used to facilitate the illustration of the present utility model. They are not intended to limit the present utility model in any way. Any person skilled in the art who makes partial modifications or alterations to the technical content disclosed in the present utility model without departing from the scope of the technical features of the present utility model shall still fall within the scope of the technical features of the present utility model.
Claims
1. A gearbox structure for a high-torque geared motor, comprising a bracket (1) connected to the front end of the motor housing, characterized in that, The bracket (1) is connected to mounting plates (2) that are parallel to each other and spaced apart. A double gear (3) is rotatably connected between the two mounting plates (2). The second-stage input gear of the double gear (3) meshes with the first-stage input worm (4) on the motor power output shaft. The free end of the first-stage input worm (4) extends to the outside of the double gear (3) and is provided with a fan blade that blows air toward the gear. The first-stage output gear of the double gear (3) meshes with a second-stage output gear (5) whose outer diameter is larger than that of the first-stage output gear. The second-stage output gear (5) is fixedly connected to an output shaft (6) that can be detachably connected to an external component. The outer diameter of the second-stage input gear of the double gear (3) is larger than that of the first-stage output gear.
2. The gearbox structure for a high-torque geared motor according to claim 1, characterized in that, The bracket (1) has a limiting step (7) on one side of each side near the motor housing, which cooperates with the mounting plate (2); a threaded hole (8) is provided at the top of the bracket (1), and a limiting plate (9) is provided on the mounting plate (2) that cooperates with the top of the bracket (1). The limiting plate (9) and the threaded hole (8) are fixed by screws.
3. The gearbox structure for a high-torque geared motor according to claim 2, characterized in that, Two limiting steps (7) are symmetrically arranged on both sides of the bracket (1). A positioning protrusion (10) is provided on the bracket (1) between the two limiting steps (7). A positioning notch (11) is provided on the mounting plate (2) to match the positioning protrusion (10).
4. The gearbox structure for a high-torque geared motor according to claim 1, characterized in that, The bracket (1) is provided with several oil-impregnated bearings (12) that respectively cooperate with the double gear (3) and the secondary output gear (5).