Large-torque motor gearbox

Abstract

The utility model provides a large-torque motor gear box which comprises a mounting seat used for being mounted on a motor, the mounting seat is provided with a motor gear and a plurality of transmission gears, the motor gear is connected with the motor, the transmission gears are provided with driving teeth and driven teeth which are coaxially arranged, the driving teeth are meshed with the motor gear, and the driven teeth are meshed with the motor gear. The driven gear is arranged in an inner gear ring and meshed with inner teeth of the inner gear ring, a sun gear is arranged at the top of the inner gear ring, a plurality of planet gears are arranged around and meshed with the sun gear, the planet gears are connected into an output frame in a free rotating shaft connection mode, an output shaft is arranged at the top of the output frame, and the bottom of the output shaft is connected with a stress shaft; the axes of the output shaft, the output frame, the sun gear and the stress shaft coincide. Based on the arrangement of the output frame and the output shaft, extrusion force borne by the gearbox is dispersed to the stress shaft through the output shaft, a transmission gear, a motor gear, a planet gear, a sun gear and the like in the gearbox are prevented from being extruded, then the transmission efficiency can be prevented from being affected, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission mechanisms, in particular to a large torque motor gear box. Background Art

[0002] Gearboxes are composed of multiple gears. They change the speed and direction of power transmission through the gear transmission between them. They are commonly found in various mechanical systems and are used with various gear pumps, motors and other equipment commonly used in factories. Gearboxes can achieve different speed ratios and torque outputs by combining gears of different sizes and shapes to adapt to different work requirements.

[0003] In the prior art, due to the design defects of the gearbox itself, the output shaft of the gearbox will be subjected to positive force during operation, which will squeeze the internal gears, causing the internal gear transmission of the gearbox to be blocked, reducing the transmission efficiency, and making the torque smaller than the design parameters. What's worse, severe squeezing will cause the gears to fly off, posing a safety risk. Utility Model Content

[0004] The purpose of the utility model is to provide a large torque motor gearbox, which has the advantages of high transmission efficiency, large output torque, good transmission effect and stable transmission quality, and solves the problem of the existing gear transmission box that the output shaft is subjected to positive force during operation, which will squeeze the internal gears and thus affect the transmission use.

[0005] In order to achieve the above purpose, the following technical solutions are adopted:

[0006] A large torque motor gearbox comprises a mounting base for mounting on a motor, the mounting base is provided with a motor gear and a plurality of transmission gears, the motor gear is connected to the motor, the transmission gear has a driving tooth and a driven tooth arranged coaxially, the driving tooth meshes with the motor gear, the driven tooth is placed in an inner gear ring and meshes with the inner teeth of the inner gear ring, a sun gear is arranged on the top of the inner gear ring, a plurality of planetary gears are surrounded and meshed around the sun gear, the plurality of planetary gears are freely rotatably connected to an output frame, and a sun gear is arranged on the top of the output frame. There is an output shaft, the bottom of the output shaft contacts a force-bearing shaft that passes through the output frame and the axis of the sun gear, the axes of the output shaft, the output frame, the sun gear and the force-bearing shaft coincide, a protective cover is formed on the mounting seat to isolate the top of the motor gear, mounting positions for installing the active gear and making the active gear mesh with the motor gear are provided between the two sides of the protective cover and the mounting seat, and positioning holes for installing a positioning shaft are provided on the protective cover and the mounting seat corresponding to the mounting position, and the positioning shaft passes through the transmission.

[0007] Furthermore, a positioning groove is provided on the protective cover, a fixing block is provided in the positioning groove, the fixing block is connected to the lower end of the force-bearing shaft, the sun gear is passed through by the force-bearing shaft, and the force-bearing shaft touches the output shaft.

[0008] Furthermore, the number of the transmission gears is two.

[0009] Furthermore, the number of the planetary gears is three.

[0010] Furthermore, the output frame is provided with a non-circular mounting hole for inserting the output shaft, a positioning flange is provided in the mounting hole, and the output shaft is provided with a groove matched with the positioning flange.

[0011] Furthermore, the gear box also includes a box body, which is installed on the mounting seat and covers the output frame, the planetary gears, the inner ring gear and the transmission gear.

[0012] Furthermore, the output shaft passes through the box body, and a shaft ring is provided between the output shaft and the box body.

[0013] By adopting the above scheme, the beneficial effects of the utility model are:

[0014] Based on the setting of the output frame and the output shaft, the extrusion force on the gearbox is dispersed from the output shaft to the force-bearing shaft, avoiding the transmission gears, motor teeth, planetary gears, sun gears, etc. from being squeezed, thereby avoiding affecting the transmission efficiency and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial structural schematic diagram of a gear box according to an embodiment of the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the decomposition structure;

[0017] Figure 3 This is a schematic diagram of the structure of the mounting base of an embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the output frame and the output shaft of an embodiment of the utility model;

[0019] Figure 5 This is a schematic structural diagram of a gear box according to an embodiment of the utility model.

[0020] The accompanying drawings illustrate:

[0021] 1. Mounting seat; 11. Protective cover; 12. Positioning groove; 13. Mounting position; 14. Positioning hole; 15. Fixing block; 2. Motor gear; 3. Transmission gear; 31. Driving gear; 32. Driven gear; 33; 4. Internal gear ring; 41. Internal gear; 42. Sun gear; 5. Planetary gear; 6. Output frame; 61. Mounting hole; 62. Positioning flange; 7. Output shaft; 71. Groove; 8. Force shaft; 9. Box body; 10. Shaft ring. DETAILED DESCRIPTION

[0022] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0023] like Figure 1-5 As shown, a large torque motor gearbox includes a mounting base 1 for mounting on a motor, the mounting base 1 is provided with a motor gear 2 and a plurality of transmission gears 3, the motor gear 2 is connected to the motor, the transmission gear 3 has a coaxially arranged driving tooth 31 and a driven tooth 32, the driving tooth 31 is meshed with the motor gear 2, the driven tooth 32 is placed in an inner gear ring 4 and meshed with an inner tooth 41 of the inner gear ring 4, a sun gear 42 is arranged on the top of the inner gear ring 4, a plurality of planetary gears 5 are surrounded and meshed around the sun gear 42, and the plurality of planetary gears 5 are freely rotatably connected to an output frame 6, an output shaft 7 is arranged on the top of the output frame 6, and the bottom of the output shaft 7 contacts a force-bearing shaft 8 that passes through the output frame 6 and the axis of the sun gear 42, and the axis of the output shaft 7, the output frame 6, the sun gear 42, and the force-bearing shaft 8 coincide.

[0024] In one embodiment, a protective cover 11 is formed on the mounting seat 1 to isolate the upper part of the motor gear 2, and mounting positions 13 for installing the active gear 31 and making the active gear 31 mesh with the motor gear 2 are provided between the two sides of the protective cover 11 and the mounting seat 1. Among them, based on the protective cover 11, the motor teeth of the most important output power source are protected, which can prevent the motor teeth from being squeezed on the one hand, and on the other hand, can form a protection for the motor teeth to prevent the motor teeth from being disengaged in the event of an accident. In addition, a positioning hole 14 for installing the positioning shaft 33 is provided on the protective cover 11 and the mounting seat 1 corresponding to the mounting position 13, and the positioning shaft 33 passes through the transmission gear 3. Similarly, the transmission gear 3 adopts a semi-hidden installation to protect the meshing part of the transmission gear 3 and the motor teeth as much as possible, and is fixed by the positioning shaft 33 to prevent the transmission gear 3 from displacement. A positioning groove 12 is provided on the protective cover 11, and a fixing block 15 is provided in the positioning groove 12. The fixing block 15 is connected to the lower end of a force-bearing shaft 8, and the sun gear 42 is passed through the force-bearing shaft 8, and the force-bearing shaft 8 touches the output shaft 7. On the one hand, based on the force-bearing shaft 8, the internal gear 41, the sun gear 42, the output frame 6, etc. can rotate on the same axis, ensuring the stability of the output, and based on the force-bearing shaft 8, the anti-extrusion effect of the gearbox is improved, that is, the force of the output shaft 7 will be dispersed to the force-bearing shaft 8, and the force-bearing shaft 8 will transfer the force to the fixing block 15, and the fixing block 15 will transfer the force to the mounting seat 1, thereby reducing the influence of the extrusion force on the gear and improving the transmission efficiency; in addition, the fixing block 15 is the main force point, so the fixing block 15 is set to be detachable, which is convenient for later maintenance and replacement.

[0025] In one embodiment, the number of the transmission gears 3 is two and the number of the planetary gears 5 is three.

[0026] In one embodiment, the output frame 6 is provided with a non-circular mounting hole 61 for inserting the output shaft 7, a positioning flange 62 is provided in the mounting hole 61, and the output shaft 7 is provided with a groove 71 that cooperates with the positioning flange 62. In this way, the output frame 6 can be firmly installed between the output shaft 7.

[0027] In one embodiment, the gearbox further comprises a housing 9, which is mounted on the mounting seat 1 and covers the output carrier 6, the planetary gears 5, the inner ring 4 and the transmission gear 3. The output shaft 7 passes through the housing 9, and a shaft ring 10 is provided between the output shaft 7 and the housing 9. Based on the housing 9, the internal components can be protected, and based on the shaft ring 10, the housing 9 can be prevented from being worn.

[0028] Working principle:

[0029] During operation, the mounting base 1 is installed on the motor, and the motor drives the motor gear 2 to rotate, then the driving teeth 31 of the two transmission gears 3 rotate, and then the driven teeth 32 rotate, driving the inner ring gear 4 to rotate, and then the sun gear 42 rotates, driving the planetary gears 5 to rotate. The simultaneous rotation of multiple planetary gears 5 will drive the output frame 6 to rotate, and the output frame 6 will drive the output shaft 7 to rotate, thereby realizing a large torque power output.

[0030] In the gearbox provided by the present invention, the design of the force-bearing shaft 8 supporting the output shaft 7 effectively solves the problem of the output shaft 7 being forced to squeeze the internal gears of the gearbox from the front, so that the gear transmission is not restricted, thereby improving the transmission efficiency; at the same time, the output shaft 7 will also disperse part of the force to the output frame 6, and the output frame 6 will disperse the force, and the transmission gear 3 is designed to be two, which further improves the stability of the transmission, so that the transmission effect of the gearbox is good, and the box body 9 is sleeved on the outer surface of the mounting seat 1 to ensure that the transmission environment is closed, thereby ensuring good lubrication, making the gearbox more durable, so that the gearbox has high transmission efficiency, good transmission effect and more stable transmission quality, and the gearbox has a simple structure and is easy to use, so it is easy to promote and use.

[0031] Although the present disclosure has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present disclosure can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the foregoing details, but should be widely interpreted within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A high torque motor gearbox, characterized in that: The invention comprises a mounting seat for mounting on a motor, wherein the mounting seat is provided with a motor gear and a plurality of transmission gears, the motor gear is connected to the motor, the transmission gear has a driving tooth and a driven tooth arranged coaxially, the driving tooth meshes with the motor gear, the driven tooth is placed in an inner gear ring and meshes with the inner teeth of the inner gear ring, a sun gear is arranged on the top of the inner gear ring, a plurality of planetary gears are surrounded and meshed around the sun gear, and the plurality of planetary gears are freely rotatably connected to an output frame, an output shaft is arranged on the top of the output frame, the bottom of the output shaft contacts a force-bearing shaft that passes through the output frame and the axis of the sun gear, the axis of the output shaft, the output frame, the sun gear, and the force-bearing shaft coincide, a protective cover is formed on the mounting seat to isolate the upper part of the motor gear, mounting positions for mounting the driving tooth and meshing the driving tooth with the motor gear are arranged between the two sides of the protective cover and the mounting seat, and positioning holes for mounting a positioning shaft corresponding to the mounting position are arranged on the protective cover and the mounting seat, and the positioning shaft passes through the transmission gear.

2. The high torque motor gearbox according to claim 1, characterized in that: The protective cover is provided with a positioning groove, a fixing block is provided in the positioning groove, the fixing block is connected to the lower end of the force-bearing shaft, the sun gear is passed through by the force-bearing shaft, and the force-bearing shaft touches the output shaft.

3. The high torque motor gearbox according to claim 1, characterized in that: The number of the transmission gears is two.

4. The high torque motor gearbox according to claim 1, characterized in that: The number of the planetary gears is three.

5. The high torque motor gearbox according to claim 1, characterized in that: The output frame is provided with a non-circular mounting hole for inserting the output shaft, a positioning flange is provided in the mounting hole, and the output shaft is provided with a groove matched with the positioning flange.

6. The high torque motor gearbox according to claim 1, characterized in that: The gear box further comprises a housing, which is mounted on the mounting seat and covers the output frame, the planetary gears, the inner ring gear and the transmission gear.

7. The high torque motor gearbox according to claim 6, characterized in that: The output shaft passes through the box body, and a shaft ring is arranged between the output shaft and the box body.

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