Speed reducer anti-backlash structure
By adopting a floating gap-removing structure in the reducer, the flexible coordination of the gear is achieved by using the spring and the abutment seat, the problem of low transmission efficiency and stability is solved, and the occurrence of jamming is avoided.
Patent Information
- Application Number
- CN202323670084.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-12-29
AI Technical Summary
In the existing gear reducers with large-size gears, there must be a clearance between the gear fit between the transmission shafts, resulting in low transmission efficiency and low stability. At the same time, if the gap is reduced, the gears are prone to heat, swell, and cause jamming.
The floating gap-removing structure is adopted, including a spring and abutment seat, which pushes the fourth transmission gear up and down through the spring to reduce the gear fitting gap between the transmission shafts, and adjust the thrust of the spring through the adjustment nut to ensure the flexible fit of the gear.
It improves transmission stability and transmission efficiency, avoids jamming caused by too small clearance, and achieves close integration of gears and efficient transmission.
Smart Images
Figure CN222436998U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of reducers, in particular to a backlash eliminating structure of a reducer. Background Art
[0002] In the existing processing of large-sized gears, a cutting machine is used to segment the gears to be processed. Because the weight of the gears is very heavy during the processing of large-sized gears, a large force is required to drive the bearing mechanism in the equipment to rotate the gears to be processed. In the segmenter, the drive motor outputs power, and the power is driven to the segmenter through the reducer to rotate the rotating gears. However, there must be a gap between the gears in the transmission shaft in the reducer, and high precision cannot be achieved. Therefore, in the transmission process, there will always be problems such as low transmission efficiency and low stability due to the existence of the gap. However, if the gap is reduced, the gears will easily heat up and swell under long-term high-load working conditions, and it is easy to swell and get stuck.
[0003] Therefore, it is urgent to develop an anti-backlash structure that can not only reduce the gap between gears to improve transmission efficiency, but also avoid the situation where the gears become hot, swollen and stuck due to too small a gap. Summary of the invention
[0004] In order to solve the above problems, the utility model provides a speed reducer backlash elimination structure.
[0005] The technical solution of the utility model is: a reducer anti-backlash structure, including a reducer and a section machine rotating gear, the reducer includes a main input shaft, a first transmission shaft and a second transmission shaft, the main input shaft is connected to the output end of the driving motor, the power is input from the input end of the main input shaft, the output ends of the first transmission shaft and the second transmission shaft are respectively provided with a first transmission gear and a second transmission gear, the first transmission gear and the second transmission gear are respectively meshed with the section machine rotating gear; the second transmission shaft is provided with a floating anti-backlash structure.
[0006] Preferably, the main input shaft is provided with a sixth transmission gear and a fifth transmission gear from bottom to top, the first transmission shaft is provided with a third transmission gear and a first transmission gear from bottom to top, and the second transmission shaft is provided with a fourth transmission gear and a second transmission gear from bottom to top, the sixth transmission gear on the main input shaft is meshed with the third transmission gear on the first transmission shaft, and the fifth transmission gear on the main input shaft is meshed with the fourth transmission gear on the second transmission shaft; the floating anti-backlash structure is arranged at the fourth transmission gear.
[0007] Preferably, the floating anti-backlash structure includes a spring and a support seat, the fourth transmission gear is sleeved on the second transmission shaft, the support seat is sleeved on the outside of the second transmission shaft and is located below the fourth transmission gear, the spring is located between the fourth transmission gear and the support seat, the upper end of the spring abuts against the lower end face of the fourth transmission gear, and the lower end of the spring abuts against the upper end face of the support seat.
[0008] As a further preference, the fourth transmission gear and the second transmission shaft are connected via a flat key.
[0009] As a further preference, the outer circumference of the spring is limited by a retaining frame, the retaining frame is annularly arranged on the outside of the second transmission shaft, and the retaining frame also has spring limiting channels evenly distributed in annular shapes, and the spring is arranged in the spring limiting channel.
[0010] As a further preference, the lower portion of the second transmission shaft is provided with an external thread, and an adjusting nut is provided below the abutment seat, the adjusting nut is meshed with the external thread, the abutment seat abuts against the top of the adjusting nut, and the raising and lowering of the adjusting nut at the external thread limits the upper and lower positions of the abutment seat.
[0011] As a further preferred embodiment, the reducer also includes a shell and a base, the shell is arranged above the base, the main input shaft, the first transmission shaft and the second transmission shaft are all arranged in a vertical state in the shell, the lower ends of the three shafts are rotatably arranged in the base, the upper end surface of the shell is provided with an end cover, the upper end of the main input shaft is rotatably arranged in the end cover, the upper end of the first transmission shaft and the upper end of the second transmission shaft both pass through the end cover and extend upward, the first transmission gear and the second transmission gear are located above the end cover and are simultaneously engaged with the rotating gear of the sectioning machine.
[0012] As a further preference, when observing the reducer from the output end side of the first transmission shaft and the second transmission shaft, the main input shaft rotates counterclockwise, and the first transmission shaft and the second transmission shaft both rotate clockwise.
[0013] Preferably, the first transmission gear, the second transmission gear, the third transmission gear, the fourth transmission gear, the fifth transmission gear and the sixth transmission gear are all helical cylindrical gears, wherein the first transmission gear, the second transmission gear, the fourth transmission gear and the sixth transmission gear are left-handed, and the third transmission gear and the fifth transmission gear are right-handed.
[0014] As further preferred, the spring is a rectangular spring.
[0015] The beneficial effects of the utility model are as follows: the anti-backlash structure provided in the utility model reduces the gear matching clearance between the transmission shafts in the reducer, thereby improving the transmission stability and transmission efficiency.
[0016] The anti-backlash structure uses a spring to push the fourth transmission gear up and down to reduce the transmission gap between the fifth transmission gear on the main input shaft and the fourth transmission gear on the second transmission shaft. At the same time, the gears will also generate axial force along the transmission shaft during the meshing process. In this case, the gaps between the transmission gears that match each other on the main input shaft and the first and second transmission shafts will be eliminated, resulting in higher transmission efficiency to the first and second transmission shafts, and a tighter combination between the second transmission gear on the second transmission shaft, the first transmission gear on the first transmission shaft and the rotating gear of the sectionalizer.
[0017] Using a spring as the driving force source for the floating anti-backlash structure can achieve flexible cooperation between the two transmission gears, avoiding the situation where rigid friction caused by directly reducing the gap leads to jamming. The thrust generated by the spring can also be adjusted by adjusting the position of the adjusting nut on the second transmission shaft, thereby making the floating of the fourth transmission gear more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The utility model is a schematic diagram of the working state structure installed in the stationary blade ring cutting machine.
[0019] Figure 2 This is one of the positional structural relationship diagrams between the utility model and the rotating gear of the sectionalizer.
[0020] Figure 3 It is a top view of the positional structural relationship between the utility model and the rotating gear of the sectionalizer.
[0021] Figure 4 This is a positional structural relationship diagram between the first transmission shaft, the second transmission shaft and the rotating gear of the sectionalizer of the present utility model.
[0022] Figure 5 This is a positional structural relationship diagram among the main input shaft, the first transmission shaft, and the second transmission shaft of the utility model.
[0023] Figure 6 It is a schematic diagram of the structural relationship of various components on the second transmission shaft of the utility model.
[0024] Figure 7 It is a schematic diagram of the structural relationship after the retaining frame is hidden on the second transmission shaft of the utility model.
[0025] Figure 8 It is a schematic structural diagram of the retaining frame of the utility model.
[0026] Description of symbols
[0027] 1: rotating gear of segmenter; 2: speed reducer; 3: driving motor; 4: housing; 5: first transmission gear; 6: second transmission gear; 7: base; 8: first transmission shaft; 9: third transmission gear; 10: main input shaft; 11: sixth transmission gear; 12: fifth transmission gear; 13: fourth transmission gear; 14: second transmission shaft; 15: bearing; 16: end cover; 17: spring; 18: abutment seat; 19: adjusting nut; 20: external thread; 21: retaining frame; 22: spring limiting channel. DETAILED DESCRIPTION
[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0029] like Figure 1-4 As shown, a reducer anti-backlash structure includes a reducer 2 and a section machine rotating gear 1. The reducer 2 includes a main input shaft 10, a first transmission shaft 8 and a second transmission shaft 14. The main input shaft 10 is connected to the output end of the driving motor 3, and the power is input from the input end of the main input shaft 10. The output ends of the first transmission shaft 8 and the second transmission shaft 14 are respectively provided with a first transmission gear 5 and a second transmission gear 6, and the first transmission gear 5 and the second transmission gear 6 are respectively meshed with the section machine rotating gear 1; the second transmission shaft 14 is provided with a floating anti-backlash structure.
[0030] like Figure 5 As shown, in this embodiment, the main input shaft 10 is respectively provided with a sixth transmission gear 11 and a fifth transmission gear 12 from bottom to top, the first transmission shaft 8 is respectively provided with a third transmission gear 9 and a first transmission gear 5 from bottom to top, and the second transmission shaft 14 is respectively provided with a fourth transmission gear 13 and a second transmission gear 6 from bottom to top, the sixth transmission gear 11 on the main input shaft 10 is meshed with the third transmission gear 9 on the first transmission shaft 8, and the fifth transmission gear 12 on the main input shaft 10 is meshed with the fourth transmission gear 13 on the second transmission shaft 14; the floating anti-backlash structure is arranged at the fourth transmission gear 13.
[0031] like Figure 6-7 As shown, in this embodiment, the floating anti-backlash structure includes a spring 17 and a support seat 18, the fourth transmission gear 13 is sleeved on the second transmission shaft 14, the support seat 18 is sleeved on the outside of the second transmission shaft 14 and is located below the fourth transmission gear 13, the spring 17 is located between the fourth transmission gear 13 and the support seat 18, the upper end of the spring 17 abuts against the lower end surface of the fourth transmission gear 13, and the lower end of the spring 17 abuts against the upper end surface of the support seat 18.
[0032] In this embodiment, the fourth transmission gear 13 and the second transmission shaft 14 are connected via a flat key.
[0033] like Figure 8 As shown, in this embodiment, the outer periphery of the spring 17 is limited by a retainer 21, and the retainer 21 is annularly arranged outside the second transmission shaft 14, and the retainer 21 is also annularly evenly distributed with spring limiting channels 22, and the spring 17 is arranged in the spring limiting channel 22. The retainer 21 is provided to position the spring 17, stably give thrust to the end face of the gear, and make the tooth surface of the fourth transmission gear 13 and the fifth transmission gear 12 close to each other.
[0034] In this embodiment, the lower part of the second transmission shaft 14 is provided with an external thread 20, and an adjusting nut 19 is provided below the abutting seat 18. The adjusting nut 19 is meshed with the external thread 20, and the abutting seat 18 abuts against the upper part of the adjusting nut 19. The lifting and lowering of the adjusting nut 19 at the external thread 20 limits the upper and lower positions of the abutting seat 18. By adjusting the upper and lower positions of the adjusting nut 19, the thrust of the spring 17 given to the fourth transmission gear 13 is adjusted.
[0035] like Figure 5 As shown, in this embodiment, the reducer 2 further includes a housing 4 and a base 7, the housing 4 is arranged above the base 7, the main input shaft 10, the first transmission shaft 8 and the second transmission shaft 14 are all arranged in a vertical state in the housing 4, the lower ends of the three shafts are rotatably arranged in the base 7, the upper end surface of the housing 4 is provided with an end cover 16, the upper end of the main input shaft 10 is rotatably arranged in the end cover 16, the upper end of the first transmission shaft 8 and the upper end of the second transmission shaft 14 both pass through the end cover 16 and extend upward, the first transmission gear 5 and the second transmission gear 6 are located above the end cover 16, and are meshed with the segmenter rotating gear 1 at the same time. Bearings 15 are arranged between the three shafts and the end cover 16 and between the three shafts and the base 7 to make the three shafts rotate more smoothly.
[0036] In this embodiment, observing the reducer 2 from the output end side of the first transmission shaft 8 and the second transmission shaft 14, the main input shaft 10 rotates counterclockwise, the first transmission shaft 8 and the second transmission shaft 14 both rotate clockwise, and the sectioning machine rotating gear 1 rotates counterclockwise.
[0037] In this embodiment, the first transmission gear 5, the second transmission gear 6, the third transmission gear 9, the fourth transmission gear 13, the fifth transmission gear 12 and the sixth transmission gear 11 are all helical cylindrical gears, which have the characteristics of large torque transmission, smooth starting and fine transmission ratio classification. The first transmission gear 5, the second transmission gear 6, the fourth transmission gear 13 and the sixth transmission gear 11 are left-handed, and the third transmission gear 9 and the fifth transmission gear 12 are right-handed. The sectioning machine rotating gear 1 is also a right-handed gear.
[0038] In this embodiment, the spring 17 is a rectangular spring. The use of spring 17 as the driving force source of the floating clearance elimination structure can achieve flexible cooperation between the two transmission gears, avoid the situation of rigid friction caused by directly reducing the gap and causing jamming, and can also adjust the thrust generated by the spring 17 by adjusting the position of the adjusting nut 19 on the second transmission shaft 14, so that the floating of the fourth transmission gear 13 is more reasonable. Taking the rectangular spring 17 with an outer diameter of 10mm and a length of 20mm as an example, the rectangular spring 17 can be compressed to a force of 50N, with a total of 8 pieces, and a total thrust of 400N can be generated. The gears on the transmission shaft are helical teeth, and axial thrust is generated during the transmission process. This thrust is much smaller than 400N, so after the left and right tooth surfaces of the two helical teeth contact to eliminate the gap, the spring 17 force is used to reach a thrust of 400N to produce a flexible cooperation.
[0039] Principle of anti-backlash: The anti-backlash structure uses a spring 17 to push the fourth transmission gear 13 to float up and down, thereby reducing the transmission clearance between the fifth transmission gear 12 on the main input shaft 10 and the fourth transmission gear 13 on the second transmission shaft 14. At the same time, the gears will also generate axial force along the transmission shaft during the meshing process. In this case, the clearances between the transmission gears that cooperate with each other on the main input shaft 10 and the first transmission shaft 8 and the second transmission shaft 14 will be eliminated, resulting in higher transmission efficiency to the first transmission shaft 8 and the second transmission shaft 14, and a tighter combination between the second transmission gear 6 on the second transmission shaft 14, the first transmission gear 5 on the first transmission shaft 8 and the rotating gear 1 of the segmenter.
[0040] In the description of the utility model specification, it is necessary to understand that the terms "the other side", "the middle", "the left and right sides", "the top", "the lower surface", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0041] In the present invention, unless otherwise specified and limited, the term "connection" and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A reducer anti-backlash structure, characterized in that The invention comprises a reducer (2) and a rotating gear (1) for a segmenter. The reducer (2) comprises a main input shaft (10), a first transmission shaft (8) and a second transmission shaft (14). The main input shaft (10) is connected to the output end of a driving motor (3). Power is input from the input end of the main input shaft (10). The output ends of the first transmission shaft (8) and the second transmission shaft (14) are respectively provided with a first transmission gear (5) and a second transmission gear (6). The first transmission gear (5) and the second transmission gear (6) are respectively meshed with the rotating gear (1) for a segmenter. The second transmission shaft (14) is provided with a floating anti-backlash structure.
2. A reducer anti-backlash structure according to claim 1, characterized in that The main input shaft (10) is provided with a sixth transmission gear (11) and a fifth transmission gear (12) from bottom to top, respectively; the first transmission shaft (8) is provided with a third transmission gear (9) and a first transmission gear (5) from bottom to top, respectively; the second transmission shaft (14) is provided with a fourth transmission gear (13) and a second transmission gear (6) from bottom to top, respectively; the sixth transmission gear (11) on the main input shaft (10) is meshed with the third transmission gear (9) on the first transmission shaft (8), and the fifth transmission gear (12) on the main input shaft (10) is meshed with the fourth transmission gear (13) on the second transmission shaft (14); and the floating anti-backlash structure is provided at the fourth transmission gear (13).
3. A reducer backlash elimination structure according to claim 2, characterized in that The floating clearance-eliminating structure comprises a spring (17) and a support seat (18); the fourth transmission gear (13) is sleeved on the second transmission shaft (14); the support seat (18) is sleeved on the outside of the second transmission shaft (14) and is located below the fourth transmission gear (13); the spring (17) is located between the fourth transmission gear (13) and the support seat (18); the upper end of the spring (17) is in contact with the lower end surface of the fourth transmission gear (13); and the lower end of the spring (17) is in contact with the upper end surface of the support seat (18).
4. A reducer backlash elimination structure according to claim 3, characterized in that The fourth transmission gear (13) and the second transmission shaft (14) are connected via a parallel key.
5. A speed reducer backlash elimination structure according to claim 3, characterized in that The outer periphery of the spring (17) is limited by a retaining frame (21), the retaining frame (21) is arranged in an annular shape outside the second transmission shaft (14), and the retaining frame (21) is also provided with spring limiting channels (22) evenly distributed in an annular shape, and the spring (17) is arranged in the spring limiting channel (22).
6. A speed reducer backlash elimination structure according to claim 3, characterized in that The lower portion of the second transmission shaft (14) is provided with an external thread (20), and an adjusting nut (19) is provided below the abutment seat (18). The adjusting nut (19) is meshed with the external thread (20), and the abutment seat (18) abuts against the upper portion of the adjusting nut (19). The raising and lowering of the adjusting nut (19) at the external thread (20) limits the upper and lower positions of the abutment seat (18).
7. A speed reducer backlash elimination structure according to claim 2, characterized in that The reducer (2) further comprises a housing (4) and a base (7), wherein the housing (4) is arranged above the base (7), the main input shaft (10), the first transmission shaft (8) and the second transmission shaft (14) are all arranged in a vertical state in the housing (4), the lower ends of the three shafts are rotatably arranged in the base (7), the upper end surface of the housing (4) is provided with an end cover (16), the upper end of the main input shaft (10) is rotatably arranged in the end cover (16), the upper end of the first transmission shaft (8) and the upper end of the second transmission shaft (14) both pass through the end cover (16) and extend upward, the first transmission gear (5) and the second transmission gear (6) are located above the end cover (16) and are simultaneously meshed with the rotating gear (1) of the sectionalizer.
8. The reducer anti-backlash structure according to claim 2, characterized in that When observing the reducer (2) from the output end side of the first transmission shaft (8) and the second transmission shaft (14), the main input shaft (10) rotates counterclockwise, and the first transmission shaft (8) and the second transmission shaft (14) both rotate clockwise.
9. The reducer anti-backlash structure according to claim 2, characterized in that The first transmission gear (5), the second transmission gear (6), the third transmission gear (9), the fourth transmission gear (13), the fifth transmission gear (12) and the sixth transmission gear (11) are all helical cylindrical gears, wherein the first transmission gear (5), the second transmission gear (6), the fourth transmission gear (13) and the sixth transmission gear (11) are left-handed, and the third transmission gear (9) and the fifth transmission gear (12) are right-handed.
10. The reducer anti-backlash structure according to claim 3, characterized in that The spring (17) is a rectangular spring.