Combined speed reducer for transmission system of cyperus esculentus harvester

Abstract

When the combined speed reducer for the transmission system of the cyperus esculentus harvester is used, a tractor drives a main shaft to rotate in the front-back direction, so that a main spiral bevel gear is driven to rotate in the front-back direction, and a left spiral bevel gear and a right spiral bevel gear are driven to rotate in the left-right direction respectively; therefore, the first output shaft and the second output shaft are driven to rotate in the left-right direction, and the 90-degree reversing and speed reduction effects are achieved. Meanwhile, the main shaft rotates in the front-back direction and further drives a first cylindrical straight gear to rotate in the front-back direction, so that a second cylindrical straight gear rotates in the front-back direction, a third cylindrical straight gear is driven by the middle shaft to rotate in the front-back direction, a fourth cylindrical straight gear rotates in the front-back direction, and finally a third output shaft is driven to rotate in the front-back direction; the speed increasing effect of the output shaft end is achieved. Reversing, speed reduction and speed increase of output can be achieved, the hydraulic transmission device can be connected with a hydraulic pump, original partial mechanical transmission is changed into hydraulic transmission, and stability and high efficiency of a whole transmission system are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of tiger nut harvester technology, and particularly to the field of tiger nut harvester transmission system technology, specifically referring to a combined reduction device for tiger nut harvester transmission system. Background Technology

[0002] Tiger nuts are a high-quality, high-yield economic crop with broad prospects for comprehensive utilization, integrating grain, oil, livestock, and feed. Tiger nuts are not demanding in terms of soil requirements, are highly adaptable, prefer sunlight, and are drought-tolerant, flood-tolerant, tolerant of poor soil, and salt-alkali-tolerant. Moreover, they are simple to manage in the field, making them widely popular among farmers.

[0003] Because tiger nuts are an introduced species, and compared to corn and wheat, this is a relatively new industry that has only begun to develop in recent years, specialized agricultural machinery for tiger nuts started later, and the level of automation is relatively backward. Existing tiger nut harvester technology is not yet mature enough; their main power is input from an external tractor and then converted, and they have multiple transmission mechanisms, making the overall transmission system chain long and complex.

[0004] Therefore, it is desirable to improve the transmission system of existing tiger nut harvesters and provide a combined reduction gear for the transmission system of tiger nut harvesters. This gear can realize output reversal, deceleration and acceleration, and can be connected to a hydraulic pump to replace the original mechanical transmission with hydraulic transmission, so as to ensure the stability and efficiency of the whole machine's transmission system. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, one objective of this utility model is to provide a combined reduction device for the transmission system of a tiger nut harvester, which can realize output reversal, deceleration and acceleration, and can be connected to a hydraulic pump to replace the original mechanical transmission with hydraulic transmission, so as to ensure the stability and efficiency of the whole machine transmission system and is suitable for large-scale promotion and application.

[0006] Another objective of this invention is to provide a combined reduction gear for the transmission system of a tiger nut harvester, which is ingeniously designed, simple in structure, easy to manufacture, and has low manufacturing cost, making it suitable for large-scale promotion and application.

[0007] To achieve the above objectives, this utility model provides a combined reduction gear for a tiger nut harvester transmission system, including a main shaft and a reduction gearbox. The combined reduction gear further includes a first output shaft, a second output shaft, a third output shaft, a main spiral bevel gear, a left spiral bevel gear, a right spiral bevel gear, an intermediate shaft, a first cylindrical spur gear, a second cylindrical spur gear, a third cylindrical spur gear, and a fourth cylindrical spur gear, wherein:

[0008] The gearbox is an L-shaped gearbox, comprising a first housing and a second housing. The first housing is vertically arranged along the left-right direction, and the second housing is vertically arranged along the front-back direction. The second housing is located in front of and connected to the left end of the first housing. The main shaft is arranged along the front-back direction and located inside the gearbox. The front end of the main shaft passes through the front sidewall of the second housing along the front-back direction and is exposed in front of the front sidewall of the second housing, and is rotatable relative to the front sidewall of the second housing in the front-back direction. The middle and rear part of the main shaft passes through the rear sidewall of the second housing and the left end of the front sidewall of the first housing along the front-back direction. The rear end of the main shaft passes through the left end of the rear sidewall of the first housing along the front-back direction and is rotatable relative to the left end of the rear sidewall of the first housing in the front-back direction.

[0009] Both the first output shaft and the second output shaft are arranged along the left-right direction and spaced apart from each other. The middle portion of the first output shaft passes through the left side wall of the second housing along the left-right direction and is rotatable relative to the left side wall of the second housing in the left-right direction. The middle portion of the second output shaft passes through the right side wall of the second housing along the left-right direction and is rotatable relative to the right side wall of the second housing in the left-right direction. The right end of the first output shaft and the left end of the second output shaft are both located inside the second housing and are respectively located to the left and right of the main shaft. The left helical bevel gear and The right spiral bevel gears are all vertically arranged and along the front-back direction, and are spaced apart from each other on the left and right sides. The left spiral bevel gear and the right spiral bevel gear are both located in the second housing and are respectively sleeved on the right end of the first output shaft and the left end of the second output shaft. The main spiral bevel gear is vertically arranged and along the left-right direction. The main spiral bevel gear is located in the second housing and is sleeved on the main shaft, and meshes with the left spiral bevel gear and the right spiral bevel gear respectively. The diameters of the left spiral bevel gear and the right spiral bevel gear are both larger than the diameter of the main spiral bevel gear.

[0010] The third output shaft is arranged along the front-rear direction and located at the right end of the first housing, to the right of the rear end of the main shaft. The front end of the third output shaft passes through the right end of the front sidewall of the first housing along the front-rear direction and is rotatable relative to the right end of the front sidewall of the first housing. The rear end of the third output shaft passes through the right end of the rear sidewall of the first housing along the front-rear direction and is rotatable relative to the right end of the rear sidewall of the first housing. The rear end of the third output shaft has an insertion groove along the front-rear direction for inserting the shaft end of the hydraulic pump within it. The intermediate shaft is arranged along the front-rear direction and located in the middle of the first housing, between the rear end of the main shaft and the third output shaft. The front end of the intermediate shaft passes through the middle of the front sidewall of the first housing along the front-rear direction and is rotatable relative to the right end of the front sidewall of the first housing. The middle part is rotatably arranged around the front-rear direction. The rear end of the intermediate shaft passes through the middle of the rear side wall of the first housing along the front-rear direction and is rotatably arranged around the front-rear direction relative to the middle of the rear side wall of the first housing. The first cylindrical spur gear and the second cylindrical spur gear are both vertically arranged and both are arranged along the left-right direction and are meshed with each other. The first cylindrical spur gear and the second cylindrical spur gear are both located in the first housing and are respectively sleeved on the rear end of the main shaft and the intermediate shaft. The third cylindrical spur gear and the fourth cylindrical spur gear are both vertically arranged and both are arranged along the left-right direction and are meshed with each other. The third cylindrical spur gear and the fourth cylindrical spur gear are both located in the first housing and are respectively sleeved on the intermediate shaft and the third output shaft. The diameter of the first cylindrical spur gear is larger than the diameter of the second cylindrical spur gear, and the diameter of the third cylindrical spur gear is larger than the diameter of the fourth cylindrical spur gear.

[0011] Preferably, the main helical bevel gear is sleeved on the front end of the main shaft and located in front of the left helical bevel gear and the right helical bevel gear.

[0012] Preferably, the main helical bevel gear is sleeved on the front middle part of the main shaft and located after the left helical bevel gear and the right helical bevel gear.

[0013] Preferably, the second cylindrical spur gear and the third cylindrical spur gear are arranged at intervals between each other.

[0014] Preferably, the combined reduction gear of the tiger nut harvester transmission system further includes a first front bearing housing, a first rear bearing housing, a first front bearing, and a first rear bearing. The first front bearing housing and the first rear bearing housing are both vertically arranged and arranged along the left-right direction, and are spaced apart from each other. The first front bearing housing and the first rear bearing housing are respectively located in the left end of the front side wall of the second housing and the rear side wall of the first housing. The first front bearing and the first rear bearing are both vertically arranged and arranged along the left-right direction, and are spaced apart from each other. The first front bearing and the first rear bearing are respectively located in the first front bearing housing and the first rear bearing housing. The front end of the main shaft and the rear end of the main shaft are respectively inserted into the first front bearing and the first rear bearing along the front-back direction.

[0015] More preferably, both the first front bearing and the first rear bearing are tapered roller bearings.

[0016] Preferably, the combined reduction gear of the tiger nut harvester transmission system further includes a left bearing housing, a right bearing housing, a first left bearing, a second left bearing, a first right bearing, and a second right bearing. The left and right bearing housings are both vertically arranged and positioned along the front-rear direction, spaced apart from each other. The left and right bearing housings are respectively located in the left side wall and the right side wall of the second housing. The first and second left bearings are both vertically arranged and positioned along the front-rear direction, spaced apart from each other. Both the first and second left bearings are located in the left bearing housing. The middle portion of the first output shaft is inserted into the first and second left bearings respectively along the left-right direction. Similarly, the first and second right bearings are both vertically arranged and positioned along the front-rear direction, spaced apart from each other. Both the first and second right bearings are located in the right bearing housing. The middle portion of the second output shaft is inserted into the first and second right bearings respectively along the left-right direction.

[0017] More preferably, the first left bearing, the second left bearing, the first right bearing, and the second right bearing are all deep groove ball bearings.

[0018] Preferably, the combined reduction gear of the tiger nut harvester transmission system further includes a third front bearing, a third rear bearing, a second front bearing housing, a second rear bearing housing, a fourth front bearing, and a fourth rear bearing. The third front bearing and the third rear bearing are both vertically arranged and positioned along the left-right direction, spaced apart from each other. The third front bearing and the third rear bearing are respectively located in the middle of the front sidewall and the middle of the rear sidewall of the first housing. The front end and the rear end of the intermediate shaft are respectively inserted into the third front bearing and the third rear bearing along the front-back direction. The second front bearing housing and the fourth rear bearing... Both rear bearing housings are vertically arranged and along the left-right direction, and are spaced apart from each other. The second front bearing housing and the second rear bearing housing are respectively located at the right end of the front side wall of the first housing and the right end of the rear side wall of the first housing. The fourth front bearing and the fourth rear bearing are both vertically arranged and along the left-right direction, and are spaced apart from each other. The fourth front bearing and the fourth rear bearing are respectively located in the second front bearing housing and the second rear bearing housing. The front end and the rear end of the third output shaft are respectively inserted into the fourth front bearing and the fourth rear bearing along the front-back direction.

[0019] More preferably, the third front bearing, the third rear bearing, the fourth front bearing, and the fourth rear bearing are all deep groove ball bearings.

[0020] The main beneficial effects of this utility model are as follows:

[0021] 1. When using the combined reduction device of the transmission system of the tiger nut harvester of this utility model, the front end of the main shaft is connected to the tractor. The shaft end of the hydraulic pump is inserted into the insertion groove at the rear end of the third output shaft along the front-back direction. The tractor drives the main shaft to rotate in the front-back direction, thereby driving the main spiral bevel gear to rotate in the front-back direction, which in turn drives the left and right spiral bevel gears to rotate in the left-right direction, thereby driving the first and second output shafts to rotate in the left-right direction, achieving 90° reversal and deceleration, realizing the first stage of transmission of the reducer. At the same time, the rotation of the main shaft in the front-back direction also drives the first cylindrical spur gear to rotate in the front-back direction, causing the second cylindrical spur gear to rotate in the front-back direction, which drives the third cylindrical spur gear to rotate in the front-back direction through the intermediate shaft, causing the fourth cylindrical spur gear to rotate in the front-back direction, and finally driving the third output shaft to rotate in the front-back direction, realizing the speed-increasing effect of the output shaft end. Therefore, it can realize output reversal, deceleration and speed-increasing, and can be connected to a hydraulic pump to change the original part of the mechanical transmission to hydraulic transmission, so as to ensure the stability and efficiency of the whole machine transmission system, and is suitable for large-scale promotion and application.

[0022] 2. When using the combined reduction gear of the transmission system of the tiger nut harvester of this utility model, the front end of the main shaft is connected to the tractor. The shaft end of the hydraulic pump is inserted into the insertion groove at the rear end of the third output shaft along the front-back direction. The tractor drives the main shaft to rotate in the front-back direction, thereby driving the main spiral bevel gear to rotate in the front-back direction, which in turn drives the left spiral bevel gear and the right spiral bevel gear to rotate in the left-right direction, thereby driving the first output shaft and the second output shaft to rotate in the left-right direction, realizing the 90° reversal and deceleration effect, and realizing the first stage transmission of the reducer. At the same time, the rotation of the main shaft in the front-back direction also drives the first cylindrical spur gear to rotate in the front-back direction, causing the second cylindrical spur gear to rotate in the front-back direction, which drives the third cylindrical spur gear to rotate in the front-back direction through the intermediate shaft, causing the fourth cylindrical spur gear to rotate in the front-back direction, and finally driving the third output shaft to rotate in the front-back direction, realizing the speed increase effect at the output shaft end. Therefore, its design is ingenious, its structure is simple, its manufacturing is simple, its manufacturing cost is low, and it is suitable for large-scale promotion and application.

[0023] These and other objects, features and advantages of this utility model will be fully apparent from the following detailed description and drawings, and can be achieved by the means, devices and combinations thereof specifically pointed out in the description of the utility model. Attached Figure Description

[0024] Figure 1 This is a perspective view of a specific embodiment of the combined reduction device of the transmission system of the tiger nut harvester of this utility model, wherein the shaft end of the hydraulic pump is inserted into the insertion groove at the rear end of the third output shaft along the front-back direction.

[0025] Figure 2 yes Figure 1 The diagram shows a top sectional view of a specific embodiment.

[0026] (Symbol Explanation)

[0027] 1. Main spindle; 2. Gearbox; 3. First output shaft; 4. Second output shaft; 5. Third output shaft; 6. Main spiral bevel gear; 7. Left spiral bevel gear; 8. Right spiral bevel gear; 9. Intermediate shaft; 10. First cylindrical spur gear; 11. Second cylindrical spur gear; 12. Third cylindrical spur gear; 13. Fourth cylindrical spur gear; 14. First housing; 15. Second housing; 16. Insertion groove; 17. First front bearing housing; 18. First rear bearing housing; 19. First front bearing; 20. First rear bearing; 21. Front hollow bearing end cover; 22. Front skeleton oil seal; 23. Rear sealed type 24 Bearing end cover; 25 Left bearing housing; 26 Right bearing housing; 27 First left bearing; 28 Second left bearing; 29 Second right bearing; 30 Left hollow bearing end cover; 31 Left skeleton oil seal; 32 Right hollow bearing end cover; 33 Right skeleton oil seal; 34 Third front bearing; 35 Third rear bearing; 36 Second front bearing housing; 37 Second rear bearing housing; 38 Fourth front bearing; 39 Fourth rear bearing; 40 First sealed bearing end cover; 41 Second sealed bearing end cover; 42 Third sealed bearing end cover; 43 Hydraulic pump. Detailed Implementation

[0028] In order to better understand the technical content of this utility model, the following embodiments are provided for detailed description.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Please see Figures 1-2 As shown, in a specific embodiment of this utility model, the combined reduction gear of the transmission system of the tiger nut harvester includes a main shaft 1, a reduction gearbox 2, a first output shaft 3, a second output shaft 4, a third output shaft 5, a main spiral bevel gear 6, a left spiral bevel gear 7, a right spiral bevel gear 8, an intermediate shaft 9, a first cylindrical spur gear 10, a second cylindrical spur gear 11, a third cylindrical spur gear 12, and a fourth cylindrical spur gear 13, wherein:

[0031] The gearbox 2 is an L-shaped gearbox, which includes a first housing 14 and a second housing 15. The first housing 14 is vertically arranged along the left-right direction, and the second housing 15 is vertically arranged along the front-back direction. The second housing 15 is located in front of and connected to the left end of the first housing 14. The main shaft 1 is arranged along the front-back direction and located inside the gearbox 2. The front end of the main shaft 1 passes through the front side wall of the second housing 15 along the front-back direction and is exposed in front of the front side wall of the second housing 15 and is rotatable relative to the front side wall of the second housing 15 around the front-back direction. The middle and rear part of the main shaft 1 passes through the rear side wall of the second housing 15 and the left end of the front side wall of the first housing 14 along the front-back direction. The rear end of the main shaft 1 passes through the left end of the rear side wall of the first housing 14 along the front-back direction and is rotatable relative to the left end of the rear side wall of the first housing 14 around the front-back direction.

[0032] The first output shaft 3 and the second output shaft 4 are both arranged along the left-right direction and spaced apart from each other. The middle part of the first output shaft 3 passes through the left side wall of the second housing 15 along the left-right direction and is rotatable relative to the left side wall of the second housing 15 around the left-right direction. The middle part of the second output shaft 4 passes through the right side wall of the second housing 15 along the left-right direction and is rotatable relative to the right side wall of the second housing 15 around the left-right direction. The right end of the first output shaft 3 and the left end of the second output shaft 4 are both located inside the second housing 15 and are respectively located on the left and right sides of the main shaft 1. The left helical bevel gear 7 and The right spiral bevel gears 8 are all vertically arranged and along the front-back direction, and are spaced apart from each other on the left and right. The left spiral bevel gear 7 and the right spiral bevel gear 8 are both located inside the second housing 15 and are respectively sleeved on the right end of the first output shaft 3 and the left end of the second output shaft 4. The main spiral bevel gear 6 is vertically arranged and along the left-right direction. The main spiral bevel gear 6 is located inside the second housing 15 and is sleeved on the main shaft 1, and meshes with the left spiral bevel gear 7 and the right spiral bevel gear 8 respectively. The diameters of the left spiral bevel gear 7 and the right spiral bevel gear 8 are both larger than the diameter of the main spiral bevel gear 6.

[0033] The third output shaft 5 is arranged along the front-rear direction and located at the right end of the first housing 14, to the right of the rear end of the main shaft 1. The front end of the third output shaft 5 passes through the right end of the front side wall of the first housing 14 along the front-rear direction and is rotatable relative to the right end of the front side wall of the first housing 14. The rear end of the third output shaft 5 passes through the right end of the rear side wall of the first housing 14 along the front-rear direction and is rotatable relative to the right end of the rear side wall of the first housing 14. The rear end of the third output shaft 5 is provided with an insertion groove 16 along the front-rear direction for inserting the shaft end of the hydraulic pump 43 into it along the front-rear direction. The intermediate shaft 9 is arranged along the front-rear direction and located in the middle of the first housing 14, between the rear end of the main shaft 1 and the third output shaft 5. The front end of the intermediate shaft 9 passes through the middle of the front side wall of the first housing 14 along the front-rear direction and is rotatable relative to the middle of the front side wall of the first housing 14. The intermediate shaft 9 is rotatably configured in the front-rear direction. Its rear end passes through the middle of the rear sidewall of the first housing 14 along the front-rear direction and is rotatably configured relative to the middle of the rear sidewall of the first housing 14 around the front-rear direction. The first cylindrical spur gear 10 and the second cylindrical spur gear 11 are both vertically positioned and aligned along the left-right direction, meshing with each other. Both the first cylindrical spur gear 10 and the second cylindrical spur gear 11 are located within the first housing 14 and are respectively sleeved on the rear end of the main shaft 1. On the intermediate shaft 9, the third cylindrical spur gear 12 and the fourth cylindrical spur gear 13 are both vertically arranged and along the left-right direction, and are meshed with each other. The third cylindrical spur gear 12 and the fourth cylindrical spur gear 13 are both located inside the first housing 14 and are respectively sleeved on the intermediate shaft 9 and the third output shaft 5. The diameter of the first cylindrical spur gear 10 is larger than the diameter of the second cylindrical spur gear 11, and the diameter of the third cylindrical spur gear 12 is larger than the diameter of the fourth cylindrical spur gear 13.

[0034] Preferably, the rear sidewall of the second housing 15 can be removed, which can save materials.

[0035] The main spiral bevel gear 6 is sleeved on the main shaft 1 and can be sleeved at any suitable position on the main shaft 1. Please refer to [link / reference]. Figure 2 As shown, in a specific embodiment of this utility model, the main spiral bevel gear 6 is sleeved on the front end of the main shaft 1 and located in front of the left spiral bevel gear 7 and the right spiral bevel gear 8. The main spiral bevel gear 6 can also be sleeved on the middle front part of the main shaft 1 and located after the left spiral bevel gear 7 and the right spiral bevel gear 8.

[0036] The second cylindrical spur gear 11 can be located before or after the third cylindrical spur gear 12. Please refer to [link to relevant documentation]. Figure 2 As shown, in a specific embodiment of this utility model, the second cylindrical spur gear 11 and the third cylindrical spur gear 12 are arranged at intervals.

[0037] The front end of the main shaft 1 passes through the front sidewall of the second housing 15 along the front-rear direction and is exposed in front of the front sidewall of the second housing 15, and is rotatable relative to the front sidewall of the second housing 15 around the front-rear direction. The rear end of the main shaft 1 passes through the left end of the rear sidewall of the first housing 14 along the front-rear direction and is rotatable relative to the left end of the rear sidewall of the first housing 14 around the front-rear direction. Any suitable structure can be adopted. Please refer to [link / reference]. Figures 1-2 As shown, in a specific embodiment of this utility model, the combined reduction device of the transmission system of the tiger nut harvester further includes a first front bearing seat 17, a first rear bearing seat 18, a first front bearing 19, and a first rear bearing 20. The first front bearing seat 17 and the first rear bearing seat 18 are both vertically arranged and arranged along the left-right direction and are spaced apart from each other. The first front bearing seat 17 and the first rear bearing seat 18 are respectively located in the left end of the front side wall of the second housing 15 and the rear side wall of the first housing 14. The first front bearing 19 and the first rear bearing 20 are both vertically arranged and arranged along the left-right direction and are spaced apart from each other. The first front bearing 19 and the first rear bearing 20 are respectively located in the first front bearing seat 17 and the first rear bearing seat 18. The front end of the main shaft 1 and the rear end of the main shaft 1 are respectively inserted into the first front bearing 19 and the first rear bearing 20 along the front-back direction.

[0038] The first front bearing 19 and the first rear bearing 20 can be any suitable bearing. In a specific embodiment of the present invention, the first front bearing 19 and the first rear bearing 20 are both tapered roller bearings.

[0039] The combined reduction gear of the tiger nut harvester's transmission system can also include any other suitable components; please refer to [link / reference needed]. Figures 1-2As shown, in a specific embodiment of this utility model, the combined reduction device of the transmission system of the tiger nut harvester further includes a front hollow bearing end cover 21, a front skeleton oil seal 22, and a rear sealed bearing end cover 23. The front hollow bearing end cover 21 is vertically arranged and arranged along the left-right direction. The front hollow bearing end cover 21 is sleeved on the front end of the main shaft 1 and is located in front of the first front bearing seat 17 and connected to the first front bearing seat 17. The front skeleton oil seal 22 is sleeved on the front end of the main shaft 1 and is located between the front hollow bearing end cover 21, the first front bearing 19, and the front end of the main shaft 1, and abuts against the front hollow bearing end cover 21, the first front bearing 19, and the front end of the main shaft 1 respectively. The rear sealed bearing end cover 23 is vertically arranged and arranged along the left-right direction. The rear sealed bearing end cover 23 is located behind the first rear bearing seat 18 and connected to the first rear bearing seat 18.

[0040] The front skeleton oil seal 22 can be any suitable skeleton oil seal. In a specific embodiment of this utility model, the front skeleton oil seal 22 is a TC skeleton oil seal.

[0041] The middle portion of the first output shaft 3 passes through the left side wall of the second housing 15 along the left-right direction and is rotatable relative to the left side wall of the second housing 15 in the left-right direction. The middle portion of the second output shaft 4 passes through the right side wall of the second housing 15 along the left-right direction and is rotatable relative to the right side wall of the second housing 15 in the left-right direction. Any suitable structure can be adopted. Please refer to [link / reference]. Figures 1-2 As shown, in a specific embodiment of this utility model, the combined reduction device of the tiger nut harvester transmission system further includes a left bearing seat 24, a right bearing seat 25, a first left bearing 26, a second left bearing 27, a first right bearing 28, and a second right bearing 29. The left bearing seat 24 and the right bearing seat 25 are both vertically arranged and along the front-back direction, and are spaced apart from each other. The left bearing seat 24 and the right bearing seat 25 are respectively disposed in the left side wall and the right side wall of the second housing 15. The first left bearing 26 and the second left bearing 27 are both vertically arranged and along the front-back direction. The first left bearing 26 and the second left bearing 27 are both disposed in the left bearing housing 24. The middle part of the first output shaft 3 is inserted into the first left bearing 26 and the second left bearing 27 respectively along the left-right direction. The first right bearing 28 and the second right bearing 29 are both vertically disposed and disposed along the front-back direction, and are spaced apart from each other. The first right bearing 28 and the second right bearing 29 are both disposed in the right bearing housing 25. The middle part of the second output shaft 4 is inserted into the first right bearing 28 and the second right bearing 29 respectively along the left-right direction.

[0042] The first left bearing 26, the second left bearing 27, the first right bearing 28, and the second right bearing 29 can be any suitable bearing. In a specific embodiment of the present invention, more preferably, the first left bearing 26, the second left bearing 27, the first right bearing 28, and the second right bearing 29 are all deep groove ball bearings.

[0043] The combined reduction gear of the tiger nut harvester's transmission system can also include any other suitable components; please refer to [link / reference needed]. Figures 1-2 As shown, in a specific embodiment of this utility model, the combined reduction device of the transmission system of the tiger nut harvester further includes a left hollow bearing end cover 30, a left skeleton oil seal 31, a right hollow bearing end cover 32, and a right skeleton oil seal 33. The left hollow bearing end cover 30 is vertically arranged and arranged along the front-rear direction. The left hollow bearing end cover 30 is sleeved on the middle part of the first output shaft 3 and located to the left of the left bearing seat 24 and connected to the left bearing seat 24. The left skeleton oil seal 31 is sleeved on the middle part of the first output shaft 3 and located between the left hollow bearing end cover 30, the first left bearing 26, and the middle part of the first output shaft 3, and is separated from the left hollow bearing end cover 30. The right hollow bearing end cover 32 is vertically arranged along the front-rear direction. The right hollow bearing end cover 32 is sleeved on the middle of the second output shaft 4 and located to the right of the right bearing seat 25 and connected to the right bearing seat 25. The right skeleton oil seal 33 is sleeved on the middle of the second output shaft 4 and located between the right hollow bearing end cover 32, the second right bearing 29 and the middle of the second output shaft 4, and abuts against the middle of the right hollow bearing end cover 32, the second right bearing 29 and the middle of the second output shaft 4 respectively.

[0044] The left skeleton oil seal 31 and the right skeleton oil seal 33 can be any suitable skeleton oil seal. In a specific embodiment of this utility model, the left skeleton oil seal 31 and the right skeleton oil seal 33 are both TC skeleton oil seals.

[0045] The front end of the intermediate shaft 9 passes through the middle of the front sidewall of the first housing 14 along the front-rear direction and is rotatable relative to the middle of the front sidewall of the first housing 14 in the front-rear direction. The rear end of the intermediate shaft 9 passes through the middle of the rear sidewall of the first housing 14 along the front-rear direction and is rotatable relative to the middle of the rear sidewall of the first housing 14 in the front-rear direction. The front end of the third output shaft 5 passes through the right end of the front sidewall of the first housing 14 along the front-rear direction and is rotatable relative to the right end of the front sidewall of the first housing 14 in the front-rear direction. The rear end of the third output shaft 5 passes through the right end of the rear sidewall of the first housing 14 along the front-rear direction and is rotatable relative to the right end of the rear sidewall of the first housing 14 in the front-rear direction. Any suitable structure can be adopted. Please refer to [link to relevant documentation]. Figures 1-2 As shown, in a specific embodiment of this utility model, the combined reduction device of the transmission system of the tiger nut harvester further includes a third front bearing 34, a third rear bearing 35, a second front bearing seat 36, a second rear bearing seat 37, a fourth front bearing 38, and a fourth rear bearing 39. The third front bearing 34 and the third rear bearing 35 are both vertically arranged and along the left-right direction, and are spaced apart from each other. The third front bearing 34 and the third rear bearing 35 are respectively located in the middle of the front side wall of the first housing 14 and the middle of the rear side wall of the first housing 14. The front end and the rear end of the intermediate shaft 9 are respectively inserted into the third front bearing 34 and the third rear bearing 35 along the front-rear direction. The bearing housing 36 and the second rear bearing housing 37 are both vertically arranged and along the left-right direction, and are spaced apart from each other. The second front bearing housing 36 and the second rear bearing housing 37 are respectively located in the right end of the front side wall of the first housing 14 and the right end of the rear side wall of the first housing 14. The fourth front bearing 38 and the fourth rear bearing 39 are both vertically arranged and along the left-right direction, and are spaced apart from each other. The fourth front bearing 38 and the fourth rear bearing 39 are respectively located in the second front bearing housing 36 and the second rear bearing housing 37. The front end and the rear end of the third output shaft 5 are respectively inserted into the fourth front bearing 38 and the fourth rear bearing 39 along the front-back direction.

[0046] The third front bearing 34, the third rear bearing 35, the fourth front bearing 38, and the fourth rear bearing 39 can be any suitable bearing. In a specific embodiment of this utility model, the third front bearing 34, the third rear bearing 35, the fourth front bearing 38, and the fourth rear bearing 39 are all deep groove ball bearings.

[0047] The combined reduction gear of the tiger nut harvester's transmission system can also include any other suitable components; please refer to [link / reference needed]. Figures 1-2 As shown, in a specific embodiment of this utility model, the combined reduction device of the transmission system of the tiger nut harvester further includes a first sealed bearing end cover 40, a second sealed bearing end cover 41, and a third sealed bearing end cover 42. The first sealed bearing end cover 40, the second sealed bearing end cover 41, and the third sealed bearing end cover 42 are all vertically arranged and arranged along the left-right direction. The first sealed bearing end cover 40 is located before the middle of the front side wall of the first housing 14 and is connected to the middle of the front side wall of the first housing 14, covering the third front bearing 34. The second sealed bearing end cover 41 is located after the middle of the rear side wall of the first housing 14 and is connected to the middle of the rear side wall of the first housing 14, covering the third rear bearing 35. The third sealed bearing end cover 42 is located before the second front bearing seat 36 and is connected to the second front bearing seat 36, covering the fourth front bearing 38.

[0048] The shafts and gears in the combined reduction gear of the transmission system of the tiger nut harvester can be made of materials such as 20CrMnTi, which have high strength and toughness, and have a high ability to withstand high speed, medium speed or heavy load, as well as impact and friction.

[0049] In use, the front end of the main shaft 1 is connected to a drive device such as a tractor. The shaft end of the hydraulic pump 43 is inserted into the insertion groove 16 at the rear end of the third output shaft 5 in the front-back direction. The tractor drives the main shaft 1 to rotate in the front-back direction, thereby driving the main spiral bevel gear 6 to rotate in the front-back direction, which in turn drives the left spiral bevel gear 7 and the right spiral bevel gear 8 to rotate in the left-right direction, thereby driving the first output shaft 3 and the second output shaft 4 to rotate in the left-right direction, achieving 90° reversal and deceleration, realizing the first stage of transmission of the reducer. At the same time, the rotation of the main shaft 1 in the front-back direction also drives the first cylindrical spur gear 10 to rotate in the front-back direction, causing the second cylindrical spur gear 11 to rotate in the front-back direction. Through the intermediate shaft 9, the third cylindrical spur gear 12 is driven to rotate in the front-back direction, causing the fourth cylindrical spur gear 13 to rotate in the front-back direction, and finally driving the third output shaft 5 to rotate in the front-back direction, realizing the speed increase effect at the output shaft end, realizing the second stage of transmission of the reducer.

[0050] The present invention has the following beneficial effects:

[0051] 1. The gearbox of this utility model adopts an L-shape, combining the T-series spiral bevel gear reducer with the two-stage cylindrical gear reducer, avoiding the need for a coupling to be installed, reducing installation space and lowering costs.

[0052] 2. The front and rear ends of the main shaft of this utility model can be supported by tapered roller bearings, which greatly enhances the radial load capacity of the combined reducer and improves the service life of the reducer.

[0053] 3. The first front bearing, the first left bearing, and the second right bearing of this utility model can all be sealed with skeleton oil seals, and the first rear bearing, the third front bearing, the third rear bearing, and the fourth front bearing can all be sealed with sealed bearing end caps to prevent impurities from entering the bearings and shortening the life of the reducer.

[0054] 4. The rear end of the third output shaft of this utility model is provided with an insertion groove along the front-to-back direction. The shaft end of the hydraulic pump is embedded in the insertion groove along the front-to-back direction, which saves assembly space and makes the mechanical structure compact.

[0055] Therefore, this utility model combines a T-type spiral bevel gear reducer with a two-stage cylindrical gear reducer. The main shaft simultaneously drives the main spiral bevel gear and the first cylindrical spur gear to rotate in the front-back direction. The main spiral bevel gear meshes with the left and right spiral bevel gears respectively, realizing the 90° reversal and speed reduction output of the first and second output shafts, completing the first stage of transmission. The first cylindrical spur gear meshes with the second cylindrical spur gear, as well as the third and fourth cylindrical spur gears, to realize the speed increase effect of the third output shaft, completing the second stage of transmission.

[0056] This utility model has a compact structure. It can reduce the installation space of the reversing and deceleration mechanism in the transmission device, reduce installation steps, reduce costs, ensure the quality of the reducer, and has strong applicability and high safety and reliability.

[0057] In summary, the combined reduction gear of the transmission system of the tiger nut harvester of this utility model can realize output reversal, deceleration and acceleration, and can be connected to a hydraulic pump to replace the original mechanical transmission with hydraulic transmission, so as to ensure the stability and efficiency of the whole machine transmission system. It is ingeniously designed, simple in structure, easy to manufacture, and low in manufacturing cost, and is suitable for large-scale promotion and application.

[0058] Therefore, it is evident that the objective of this utility model has been fully and effectively achieved. The function and structural principles of this utility model have been demonstrated and explained in the embodiments. Without departing from the stated principles, any modifications can be made to the implementation methods. Therefore, this utility model includes all modified embodiments based on the spirit and scope of the claims.

Claims

1. A combined reduction gear for the transmission system of a tiger nut harvester, comprising a main shaft and a reduction gearbox, characterized in that, The combined reduction gear of the tiger nut harvester transmission system further includes a first output shaft, a second output shaft, a third output shaft, a main spiral bevel gear, a left spiral bevel gear, a right spiral bevel gear, an intermediate shaft, a first cylindrical spur gear, a second cylindrical spur gear, a third cylindrical spur gear, and a fourth cylindrical spur gear, wherein: The gearbox is an L-shaped gearbox, comprising a first housing and a second housing. The first housing is vertically arranged along the left-right direction, and the second housing is vertically arranged along the front-back direction. The second housing is located in front of and connected to the left end of the first housing. The main shaft is arranged along the front-back direction and located inside the gearbox. The front end of the main shaft passes through the front sidewall of the second housing along the front-back direction and is exposed in front of the front sidewall of the second housing, and is rotatable relative to the front sidewall of the second housing in the front-back direction. The middle and rear part of the main shaft passes through the rear sidewall of the second housing and the left end of the front sidewall of the first housing along the front-back direction. The rear end of the main shaft passes through the left end of the rear sidewall of the first housing along the front-back direction and is rotatable relative to the left end of the rear sidewall of the first housing in the front-back direction. Both the first output shaft and the second output shaft are arranged along the left-right direction and spaced apart from each other. The middle portion of the first output shaft passes through the left side wall of the second housing along the left-right direction and is rotatable relative to the left side wall of the second housing in the left-right direction. The middle portion of the second output shaft passes through the right side wall of the second housing along the left-right direction and is rotatable relative to the right side wall of the second housing in the left-right direction. The right end of the first output shaft and the left end of the second output shaft are both located inside the second housing and are respectively located to the left and right of the main shaft. The left helical bevel gear and The right spiral bevel gears are all vertically arranged and along the front-back direction, and are spaced apart from each other on the left and right sides. The left spiral bevel gear and the right spiral bevel gear are both located in the second housing and are respectively sleeved on the right end of the first output shaft and the left end of the second output shaft. The main spiral bevel gear is vertically arranged and along the left-right direction. The main spiral bevel gear is located in the second housing and is sleeved on the main shaft and meshes with the left spiral bevel gear and the right spiral bevel gear respectively. The diameter of the left spiral bevel gear and the diameter of the right spiral bevel gear are both larger than the diameter of the main spiral bevel gear. The third output shaft is arranged along the front-rear direction and located at the right end of the first housing, to the right of the rear end of the main shaft. The front end of the third output shaft passes through the right end of the front sidewall of the first housing along the front-rear direction and is rotatable relative to the right end of the front sidewall of the first housing. The rear end of the third output shaft passes through the right end of the rear sidewall of the first housing along the front-rear direction and is rotatable relative to the right end of the rear sidewall of the first housing. The rear end of the third output shaft has an insertion groove along the front-rear direction for inserting the shaft end of the hydraulic pump within it. The intermediate shaft is arranged along the front-rear direction and located in the middle of the first housing, between the rear end of the main shaft and the third output shaft. The front end of the intermediate shaft passes through the middle of the front sidewall of the first housing along the front-rear direction and is rotatable relative to the right end of the front sidewall of the first housing. The middle part is rotatably arranged around the front-rear direction. The rear end of the intermediate shaft passes through the middle of the rear side wall of the first housing along the front-rear direction and is rotatably arranged around the front-rear direction relative to the middle of the rear side wall of the first housing. The first cylindrical spur gear and the second cylindrical spur gear are both vertically arranged and both are arranged along the left-right direction and are meshed with each other. The first cylindrical spur gear and the second cylindrical spur gear are both located in the first housing and are respectively sleeved on the rear end of the main shaft and the intermediate shaft. The third cylindrical spur gear and the fourth cylindrical spur gear are both vertically arranged and both are arranged along the left-right direction and are meshed with each other. The third cylindrical spur gear and the fourth cylindrical spur gear are both located in the first housing and are respectively sleeved on the intermediate shaft and the third output shaft. The diameter of the first cylindrical spur gear is larger than the diameter of the second cylindrical spur gear, and the diameter of the third cylindrical spur gear is larger than the diameter of the fourth cylindrical spur gear.

2. The combined reduction gear of the transmission system for the tiger nut harvester as described in claim 1, characterized in that, The main spiral bevel gear is sleeved on the front end of the main shaft and is located in front of the left spiral bevel gear and the right spiral bevel gear.

3. The combined reduction gear of the transmission system for the tiger nut harvester as described in claim 1, characterized in that, The main spiral bevel gear is sleeved on the front middle part of the main shaft and is located after the left spiral bevel gear and the right spiral bevel gear.

4. The combined reduction gear of the transmission system for the tiger nut harvester as described in claim 1, characterized in that, The second cylindrical spur gear and the third cylindrical spur gear are arranged at intervals between each other.

5. The combined reduction gear of the transmission system for the tiger nut harvester as described in claim 1, characterized in that, The combined reduction gear of the transmission system of the tiger nut harvester further includes a first front bearing housing, a first rear bearing housing, a first front bearing, and a first rear bearing. The first front bearing housing and the first rear bearing housing are both vertically arranged and arranged along the left-right direction, and are spaced apart from each other. The first front bearing housing and the first rear bearing housing are respectively located in the left end of the front side wall of the second housing and the rear side wall of the first housing. The first front bearing and the first rear bearing are both vertically arranged and arranged along the left-right direction, and are spaced apart from each other. The first front bearing and the first rear bearing are respectively located in the first front bearing housing and the first rear bearing housing. The front end of the main shaft and the rear end of the main shaft are respectively inserted into the first front bearing and the first rear bearing along the front-back direction.

6. The combined reduction gear of the transmission system for the tiger nut harvester as described in claim 5, characterized in that, Both the first front bearing and the first rear bearing are tapered roller bearings.

7. The combined reduction gear of the transmission system for the tiger nut harvester as described in claim 1, characterized in that, The combined reduction gear of the tiger nut harvester transmission system further includes a left bearing housing, a right bearing housing, a first left bearing, a second left bearing, a first right bearing, and a second right bearing. The left and right bearing housings are both vertically arranged and positioned along the front-back direction, spaced apart from each other. The left and right bearing housings are respectively located in the left and right sides of the second housing. The first and second left bearings are both vertically arranged and positioned along the front-back direction, spaced apart from each other. Both the first and second left bearings are located in the left bearing housing. The middle portion of the first output shaft is inserted into the first and second left bearings respectively along the left-right direction. Similarly, the first and second right bearings are both vertically arranged and positioned along the front-back direction, spaced apart from each other. Both the first and second right bearings are located in the right bearing housing. The middle portion of the second output shaft is inserted into the first and second right bearings respectively along the left-right direction.

8. The combined reduction gear of the transmission system for the tiger nut harvester as described in claim 7, characterized in that, The first left bearing, the second left bearing, the first right bearing, and the second right bearing are all deep groove ball bearings.

9. The combined reduction gear of the transmission system for a tiger nut harvester as described in claim 1, characterized in that, The combined reduction gear of the transmission system of the tiger nut harvester further includes a third front bearing, a third rear bearing, a second front bearing housing, a second rear bearing housing, a fourth front bearing, and a fourth rear bearing. The third front bearing and the third rear bearing are both vertically arranged and positioned along the left-right direction, spaced apart from each other. The third front bearing and the third rear bearing are respectively located in the middle of the front side wall and the middle of the rear side wall of the first housing. The front end and the rear end of the intermediate shaft are respectively inserted into the third front bearing and the third rear bearing along the front-back direction. The second front bearing housing and the second rear bearing housing... All bearing housings are vertically arranged and positioned along the left-right direction, spaced apart from each other. The second front bearing housing and the second rear bearing housing are respectively located at the right end of the front side wall of the first housing and the right end of the rear side wall of the first housing. The fourth front bearing and the fourth rear bearing are both vertically arranged and positioned along the left-right direction, spaced apart from each other. The fourth front bearing and the fourth rear bearing are respectively located in the second front bearing housing and the second rear bearing housing. The front end and the rear end of the third output shaft are respectively inserted into the fourth front bearing and the fourth rear bearing along the front-back direction.

10. The combined reduction gear of the transmission system for a tiger nut harvester as described in claim 9, characterized in that, The third front bearing, the third rear bearing, the fourth front bearing, and the fourth rear bearing are all deep groove ball bearings.

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