Anti-backlash gearbox of gear reducer

Abstract

The utility model relates to the technical field of gear reducers, in particular to an anti-backlash gear box of a gear reducer, which comprises a connecting sleeve, an inner cavity of the connecting sleeve is fixedly connected with a spring, the bottom of the connecting sleeve is fixedly connected with an output shaft, and the surface of the connecting sleeve is fixedly connected with a driving gear. The surface of the output shaft is fixedly connected with a driven gear. The transmission device has the advantages of being efficient in transmission, low in noise and beneficial to prolonging the service life, in the actual use process, through matched use of the first thick gear, the driven gear, the first thin sheet gear, the second thick gear and the second thin sheet gear, the precise design and machining technology are adopted, gaps generated when the gears are meshed are reduced, the transmission precision and stability are improved, and the service life of the transmission device is prolonged. The anti-backlash gear box has the advantages that gear meshing clearance is reduced, impact and vibration of gears can be reduced, noise and vibration level are lowered, a machine runs more stably and quietly, and gear abrasion can be reduced by the anti-backlash gear box due to reduction of the gear meshing clearance.

Description

Technical Field

[0001] The utility model relates to the technical field of gear reducers, in particular to a backlash-eliminating gear box of a gear reducer. Background Art

[0002] As the core component of industrial robots, RV reducers have the advantages of a wide range of reduction ratios, high transmission accuracy, high transmission efficiency, and compact structure. However, their disadvantages are that the precision, materials, and heat treatment requirements of various components of RV reducers are high, and their structures are complex, resulting in high production and manufacturing costs and short service life. The rated service life is only 6,000 hours. In certain specific occasions, such as the application of large-load industrial robots, the maximum allowable load and rigidity of RV reducers cannot fully meet the use conditions of large-load robots. Due to the high price of RV reducers, manufacturers of industrial robots can no longer reduce the manufacturing cost of robots. Therefore, robot manufacturers have been looking for a product that can completely or partially replace RV reducers with similar functions and performance.

[0003] Aiming at the needs of domestic and foreign robot manufacturers, this utility model has independently developed a gear reducer which can completely replace the RV reducer in terms of performance. It has surpassed the RV reducer in some aspects of performance and is cheaper than the RV reducer. Utility Model Content

[0004] The purpose of the utility model is to provide a backlash-eliminating gearbox for a gear reducer, which has the advantages of efficient transmission and low noise, and is conducive to extending the service life, thereby solving the problems of high production and manufacturing costs and short service life of existing reducers, with a rated service life of only 6,000 hours.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a backlash-eliminating gear box of a gear reducer, comprising a connecting sleeve, an inner cavity of the connecting sleeve is fixedly connected to a spring, an output shaft is fixedly connected to the bottom of the connecting sleeve, a driving gear is fixedly connected to the surface of the connecting sleeve, a driven gear is fixedly connected to the surface of the output shaft, a thick gear 1 is arranged on one side of the driven gear, the thick gear 1 is meshed with the driven gear, a rotating rod is fixedly connected to one side of the thick gear 1, one side of the rotating rod is rotatably connected to the gear box, a thin gear 1 is arranged on one side of the driving gear, the thin gear 1 is meshed with the driving gear, a thick gear 2 is fixedly connected to one side of the thin gear 1, a thin gear 2 is arranged on one side of the thick gear 2, the thin gear 2 is meshed with the thick gear 2, a connecting rod is fixedly connected to one side of the thin gear 2, and the connecting rod is rotatably connected to the limiting rod.

[0006] Preferably, the rated output torque of the wheel box is 1800 Nm.

[0007] Preferably, the backlash of the output shaft is less than one arc minute.

[0008] Preferably, the anti-backlash gearbox noise of the gear reducer is less than 80db, and the transmission efficiency is greater than 90%.

[0009] Preferably, the anti-backlash gearbox of the gear reducer has a rated service life of 10,000 hours and a torsional stiffness greater than 400 Nm / arcmin.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The utility model has the advantages of efficient transmission and low noise, which is conducive to extending the service life. In actual use, through the coordinated use of thick gear one, driven gear, thin gear one, thick gear two and thin gear two, precise design and processing technology are adopted to reduce the gap during gear meshing, improve transmission accuracy and stability, and reduce the gear meshing gap to reduce the impact and vibration of the gear, thereby reducing the noise and vibration level, making the machine run more smoothly and quietly. Since the gear meshing gap is reduced, the anti-backlash gear box can reduce gear wear and extend the service life of the entire gear reducer, solving the problems of high production and manufacturing costs of existing reducers, short service life and a rated service life of only 6000 hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a schematic diagram of the anti-backlash gearbox structure of the gear reducer.

[0013] In the figure: 1. connecting sleeve; 2. spring; 3. driving gear; 4. rotating rod; 5. thick gear 1; 6. driven gear; 7. output shaft; 8. thin gear 1; 9. thick gear 2; 10. thin gear 2; 11. limiting rod; 12. connecting rod. DETAILED DESCRIPTION

[0014] 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.

[0015] As attached Figure 1As shown: the utility model provides a backlash-eliminating gearbox of a gear reducer, comprising a connecting sleeve 1, an inner cavity of the connecting sleeve 1 is fixedly connected to a spring 2, an output shaft 7 is fixedly connected to the bottom of the connecting sleeve 1, the backlash of the output shaft 7 is less than one arc minute, a driving gear 3 is fixedly connected to the surface of the connecting sleeve 1, a driven gear 6 is fixedly connected to the surface of the output shaft 7, a thick gear 15 is arranged on one side of the driven gear 6, the thick gear 15 is meshed with the driven gear 6, a rotating rod 4 is fixedly connected to one side of the thick gear 15, one side of the rotating rod 4 is rotatably connected to the gearbox, a thin-sheet gear 18 is arranged on one side of the driving gear 3, the thin-sheet gear 18 is meshed with the driving gear 3, a thick gear 2 9 is fixedly connected to one side of the thin-sheet gear 18, a thin-sheet gear 2 10 is arranged on one side of the thick gear 29, the thin-sheet gear 2 10 is meshed with the thick gear 2 9, a connecting rod 12 is fixedly connected to one side of the thin-sheet gear 2 10, and the connecting rod 12 is rotatably connected to the limiting rod 11.

[0016] In this embodiment, the rated output torque of the wheel box is 1800 Nm.

[0017] In this embodiment, the anti-backlash gearbox noise of the gear reducer is less than 80db, and the transmission efficiency is greater than 90%.

[0018] In this embodiment, the anti-backlash gearbox of the gear reducer has a rated service life of 10,000 hours, and a torsional stiffness greater than 400 Nm / arcmin.

[0019] Working principle: First, the connecting sleeve 1 rotates while driving gear 3 and output shaft 7 rotate. The driving gear 3 rotates while driving sheet gear 1 8 meshes and transmits. The sheet gear 1 8 rotates while driving thick gear 2 9 rotates. The thick gear 2 9 rotates while driving sheet gear 2 10 meshes and transmits. The sheet gear 2 10 drives the connecting rod 12 to rotate. The output shaft 7 rotates while driving driven gear 6 rotates. The driven gear 6 rotates while driving thick gear 1 5 meshes and transmits. The thick gear 1 5 rotates while driving rotating rod 4. The axial displacement of the small wheel is achieved by the spring force of spring 2. Spring 2 offsets the thick gear 1 5, driven gear 6, and sheet gear 1 The axial force when gear 1 8, thick gear 2 9 and thin gear 2 10 are meshed, so that the pair of thick gear 1 5, driven gear 6, thin gear 1 8, thick gear 2 9 and thin gear 2 10 are non-backlash transmission when meshing. Regardless of forward and reverse rotation, the meshing transmission of thick gear 1 5, driven gear 6, thin gear 1 8, thick gear 2 9 and thin gear 2 10 is non-backlash transmission, which can ensure that the backlash accuracy of the output end is less than one arc minute. After reducing the gap and error when thick gear 1 5, driven gear 6, thin gear 1 8, thick gear 2 9 and thin gear 2 10 are meshed, the anti-backlash gear box can more accurately transmit the power of the input shaft to the output shaft 7, ensuring the stability and accuracy of the transmission.

[0020] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0021] 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 backlash-eliminating gearbox for a gear reducer, comprising a connecting sleeve (1), characterized in that: The inner cavity of the connecting sleeve (1) is fixedly connected to the spring (2); the bottom of the connecting sleeve (1) is fixedly connected to the output shaft (7); the surface of the connecting sleeve (1) is fixedly connected to the driving gear (3); the surface of the output shaft (7) is fixedly connected to the driven gear (6); a thick gear (5) is provided on one side of the driven gear (6); the thick gear (5) is meshed with the driven gear (6); a rotating rod (4) is fixedly connected to one side of the thick gear (5); and one side of the rotating rod (4) is meshed with the gear The driving gear (3) is rotatably connected to the box, a thin-sheet gear (8) is provided on one side of the driving gear (3), and the thin-sheet gear (8) is meshed with the driving gear (3), a thick gear (9) is fixedly connected to one side of the thin-sheet gear (8), a thin-sheet gear (10) is provided on one side of the thick gear (9), and the thin-sheet gear (10) is meshed with the thick gear (9), a connecting rod (12) is fixedly connected to one side of the thin-sheet gear (10), and the connecting rod (12) is rotatably connected to the limiting rod (11).

2. The anti-backlash gearbox of a gear reducer according to claim 1, characterized in that: The rated output torque of the wheel box is 1800Nm.

3. The anti-backlash gearbox of a gear reducer according to claim 1, characterized in that: The hysteresis of the output shaft (7) is less than one arc minute.

4. The anti-backlash gearbox of a gear reducer according to claim 1, characterized in that: The anti-backlash gearbox noise of the gear reducer is less than 80db, and the transmission efficiency is greater than 90%.

5. The anti-backlash gearbox of a gear reducer according to claim 1, characterized in that: The anti-backlash gearbox of the gear reducer has a rated service life of 10,000 hours and a torsional stiffness greater than 400 Nm / arcmin.

Images