Power device for agricultural machinery

Abstract

The utility model relates to the field of power transmission devices, in particular to a power device for agricultural machinery, which comprises a motor, a planet wheel mechanism is arranged at the power output end of the motor, an output shaft is fittingly mounted on the planet wheel mechanism, the planet wheel mechanism comprises an oil sealing seat and a gear ring, and a support column is rotatably mounted at the end of the output shaft in the gear ring. A first-stage wheel set annularly provided with a transmission wheel is further arranged at the end of the output shaft, a connecting disc is rotationally installed at the end of the supporting column, the transmission wheel matched with the first-stage wheel set is arranged on one end face of the connecting disc, and a second-stage wheel set matched with the power output end of the motor is arranged on the other end face of the connecting disc. According to the utility model, the problems of high follow-up maintenance cost and high management difficulty of a hydraulic motor can be solved, the problems of excursion and large power consumption of a planet wheel during power transmission can be solved, forward and reverse rotation of the motor on agricultural machinery can be realized, in-situ steering and speed controllability of a vehicle can be realized, the installation is simple, the practicability is strong, and the popularization is easy. The application range is wide.

Description

Technical Field

[0001] The utility model relates to a vehicle electric drive and power transmission device, in particular to a power device for agricultural machinery. Background Art

[0002] Most agricultural machines use fuel engines as power sources, delivering power to corresponding structures to drive agricultural machinery. The engine speed of 3600 revolutions per second is converted into 80 revolutions per second, with a speed ratio of approximately 1:50. A gearbox is used to transmit power. Planetary gears refer to a gear system where, in addition to rotating around their own axes like fixed-axis gears, their axes of rotation also rotate around the axes of other gears along with the planet carrier. Currently, most planetary gear power is supplied by hydraulic motors. However, hydraulic motors are difficult to manage, have high subsequent maintenance costs, and are unable to adapt to some special environments, thus unable to achieve forward and reverse rotation, and unable to achieve in-situ steering of agricultural machinery. For the existing cantilever-type planetary gear carrier structure, firstly, the planetary gears are cantilever-supported, with poor torsional rigidity; secondly, most planetary gears are single-stage, and the planetary gears are respectively power-connected to the power component and the power output component. For the power transmission of multi-stage planetary gears, some planetary gears will be in a suspended state inside, and the planetary gears will shift during power transmission, resulting in power transmission consumption and instability. Summary of the Utility Model

[0003] The problem solved by the utility model is to provide a power device for agricultural machinery, which can solve the problems of high subsequent maintenance costs and high management difficulty of hydraulic motors, and at the same time can solve the problems of offset and large power consumption of planetary gears during power transmission.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] A power device for agricultural machinery, characterized in that it includes a motor, a planetary gear mechanism is provided on the power output end of the motor, an output shaft is cooperatively installed on the planetary gear mechanism. The planetary gear mechanism includes an oil seal seat sleeved on the output shaft, a middle joint cover installed on the power output end of the motor, and a gear ring provided between the oil seal seat and the middle joint cover. A support column is rotatably installed at the end of the output shaft inside the gear ring. A first-stage gear set surrounding the transmission wheel is further provided at the end of the output shaft. A connection disk is rotatably installed at the end of the support column. A transmission wheel cooperating with the first-stage gear set is provided on one end face of the connection disk, and a second-stage gear set cooperating with the power output end of the motor is provided on the other end face of the connection disk.

[0006] The beneficial effects of the present utility model are as follows: The use of a motor can achieve the electrical input of power. The electrical input is convenient for control and management. At the same time, the forward and reverse rotation of the motor can be controlled, so as to realize the in-situ steering of agricultural machinery. The setting of the first-stage wheel set and the second-stage wheel set can convert the high-speed and low-torque rotation of the motor into low-speed and high-torque rotation. Compared with the complex planetary gears in the prior art, the power of the motor is transmitted to the output shaft through the first-stage wheel set and the second-stage wheel set. Since the output shaft is rotatably installed on the oil seal seat, the first-stage wheel set is rotatably installed on the output shaft, the connecting plate is rotatably installed on the support column, and the second-stage wheel set is rotatably installed on the connecting plate, which ensures the centering stability and balance of the connection between the first-stage wheel set and the second-stage wheel set, avoids the offset of the planetary gears during power transmission, thus preventing the occurrence of power transmission consumption and instability, achieving a better conversion effect, reducing the production cost and the subsequent maintenance cost, and being able to solve the problems of high subsequent maintenance cost and high management difficulty of hydraulic motors.

[0007] As an improved technical solution, the output shaft includes a shaft body. The shaft body is rotatably installed at the oil seal seat through two bearings. An oil seal sleeved on the shaft body is provided at the end of the oil seal seat. A positioning seat is installed at the end of the shaft body extending out of the oil seal seat. The first-stage wheel set is rotatably installed on the positioning seat. A positioning hole is opened at the center of the positioning seat. The support columns are respectively rotatably installed at the positioning hole through needle roller bearings and ball bearings. The needle roller bearings and the ball bearings are spaced by an axle clip. A washer sleeved on the support column and used to block the ball bearing is provided at the positioning hole. An axle clip is provided between the washer and the connecting plate. A hole clip sleeved on the support column and used to block the ball bearing is also provided at the positioning hole. An axle clip for limiting the axial position on the support column is provided at the end of the connecting plate.

[0008] As an improved technical solution, the motor includes a motor housing. The motor housing is a columnar shell with openings at both ends. A plurality of positioning cylinders surrounding the axial direction of the motor housing are provided outside the motor housing. A motor bottom shell is provided at one end of the motor housing. The other end of the motor housing is connected to the intermediate joint cover. Positioning seats corresponding to the positioning cylinders are provided outside the motor bottom shell and the intermediate joint cover. A motor rotating shaft is rotatably installed inside the motor housing. A magnetic steel is provided on the motor rotating shaft. One end of the motor rotating shaft is rotatably installed at the inner end of the motor bottom shell through a bearing. The other end of the motor rotating shaft is rotatably installed at the intermediate joint cover through a bearing. And a sun gear cooperatively installed with the second-stage wheel set is installed on the motor rotating shaft extending out of the intermediate joint cover.

[0009] As an improved technical solution, internal teeth are provided inside the gear ring. The axial direction of the internal teeth is parallel to the axial direction of the gear ring. The internal teeth are respectively meshed and installed with the first-stage wheel set and the second-stage wheel set. A plurality of fixing holes are evenly opened at the end of the gear ring, and the axial direction of the fixing holes is parallel to the axial direction of the gear ring.

[0010] As an improved technical solution, the connecting disc includes a disc body. The outer diameter of the disc body is smaller than the inner diameter of the gear ring. One end of the disc body is provided with an outward-extending transmission post, and the transmission wheel is fixedly installed on the transmission post. The second-stage wheel set is rotatably installed at the other end of the disc body. There are three second-stage wheel sets, and the second-stage wheel sets are arranged around the sun gear and are meshed and installed with the sun gear.

[0011] As an improved technical solution, a convex mounting seat is provided at the center of the oil seal seat. An output through hole for passing the output shaft is opened on the mounting seat. A plurality of mounting posts are provided on the oil seal seat, and threaded holes are opened on the mounting posts. The mounting posts and the mounting seat are connected by reinforcing ribs. A plurality of packaging through holes corresponding to the fixing holes are opened on the oil seal seat.

[0012] As an improved technical solution, connecting holes corresponding to the fixing holes are opened on the periphery of the middle connecting cover. A bearing cooperating with the motor shaft is installed in the middle of the middle connecting cover. Positioning edges extending towards each other are provided at the ends of the oil seal seat and the middle connecting cover, and the inner diameter of the positioning edge is adapted to the inner diameter of the gear ring.

[0013] As an improved technical solution, a plurality of reinforcing ribs are provided on the motor housing between adjacent positioning cylinders, and the axial direction of the reinforcing ribs is parallel to the axial direction of the motor rotating shaft. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is Figure 1 the schematic structural diagram in the main view direction of

[0016] Figure 3 is Figure 2 the sectional structural diagram in the A-A direction of

[0017] Figure 4 is Figure 1 the schematic bottom view structural diagram of the second wheel set of

[0018] Figure 5 is Figure 1 the schematic top view structural diagram of the first wheel set of

[0019] Figure 6 is Figure 1Schematic structural diagram of removing the gear ring;

[0020] Figure 7 is Figure 1 Schematic structural diagram of the output shaft of;

[0021] Figure 8 is Figure 1 Schematic structural diagram of the gear ring of;

[0022] Figure 9 is Figure 1 Schematic structural diagram of the motor housing of;

[0023] Figure 10 is Figure 2 Enlarged schematic structural diagram of part A of;

[0024] Legend: 1. Motor, 2. Planetary gear mechanism, 3. Output shaft, 4. Motor housing, 5. Motor bottom shell, 6. Middle connection cover, 7. Positioning cylinder, 8. Positioning seat, 9. Motor rotating shaft, 10. Permanent magnet, 11. Sun gear, 12. Reinforcing rib, 13. Oil sealing seat, 15. Positioning edge, 16. Gear ring, 17. Internal teeth, 18. First-stage planetary gear, 19. Second-stage planetary gear, 20. Fixing hole, 21. Connecting disk, 22. Support column, 23. Transmission wheel, 24. Support column, 25. Shaft clamp, 26. Shaft body, 27. Oil seal, 28. Positioning seat, 29. Needle roller bearing, 30 Ball bearing, 31. Washer, 32. Transmission column, 33. Hole clamp. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Referring to Figures 1-10 As shown, a power device for agricultural machinery includes a motor 1. A planetary gear mechanism 2 is provided at the power output end of the motor 1, and an output shaft 3 is cooperatively installed on the planetary gear mechanism 2. The motor 1 here can adopt a three-phase motor 1, so that the forward and reverse rotation of the motor 1 can be realized, that is, the in-situ steering of the device can be realized.

[0027] The motor 1 includes a motor housing 4 which is a columnar housing with openings at both ends. One end of the motor housing 4 is provided with a motor bottom case 5, and the other end of the motor housing 4 is connected to the middle joint cover 6. The outside of the motor housing 4 is provided with a number of positioning cylinders 7 surrounding the axial direction of the motor housing 4. The outside of the motor bottom case 5 and the middle joint cover 6 is provided with positioning seats corresponding to the positioning cylinders 7. A motor rotating shaft 9 is rotatably installed inside the motor housing 4, and a magnetic steel 10 is provided on the motor rotating shaft 9. One end of the motor rotating shaft 9 is rotatably installed at the inner end of the motor bottom case 5 through a bearing, and the other end of the motor rotating shaft 9 is rotatably installed on the middle joint cover 6 through a bearing, and a sun gear 11 is installed on the motor rotating shaft 9 extending out of the middle joint cover 6. A number of reinforcing ribs 12 are provided on the motor housing 4 between adjacent positioning cylinders 7, and the axial direction of the reinforcing ribs 12 is parallel to the axial direction of the motor rotating shaft 9. The reinforcing ribs 12 can increase the strength of the motor housing 4.

[0028] The planetary gear converts the high-speed and low-torque power of the motor 1 into low-speed and high-torque power. The planetary gear mechanism 2 includes an oil sealing seat 13 and a middle joint cover 6. A gear ring 16 is provided between the oil sealing seat 13 and the middle joint cover 6. A first-stage wheel set and a second-stage wheel set arranged front and back are fitted inside the gear ring 16. An internal tooth 17 is provided inside the gear ring 16, and the axial direction of the internal tooth 17 is parallel to the axial direction of the gear ring 16. A number of fixing holes 20 are evenly opened at the end of the gear ring 16, and the axial direction of the fixing holes 20 is parallel to the axial direction of the gear ring 16. The output shaft 3 is rotatably installed on the oil sealing seat 13, and the middle joint cover 6 is installed on the power output end of the motor 1. Connecting holes corresponding to the fixing holes 20 are opened on the periphery of the middle joint cover 6. A bearing cooperating with the shaft of the motor 1 is installed in the middle of the middle joint cover 6. Positioning edges 15 extending towards each other are provided at the ends of the oil sealing seat 13 and the middle joint cover 6, and the inner diameter of the positioning edges 15 is adapted to the inner diameter of the gear ring 16. A support column is rotatably installed at the end of the output shaft 3 provided inside the gear ring 16. A first-stage wheel set surrounding the transmission wheel 23 is also provided at the end of the output shaft 3. The first-stage wheel set includes three first-stage planetary gears 18 evenly arranged at the end of the output shaft 3. A connecting disk 21 is rotatably installed at the end of the support column. A transmission wheel 23 cooperating with the first-stage wheel set is provided on one end face of the connecting disk 21, and a second-stage wheel set cooperating with the power output end of the motor 1 is provided on the other end face of the connecting disk 21. The connecting disk 21 includes a disk body, the outer diameter of the disk body is smaller than the inner diameter of the gear ring 16, an extended transmission column 32 is provided at one end of the disk body, the transmission wheel 23 is fixedly installed on the transmission column 32, and the second-stage wheel set is rotatably installed at the other end of the disk body. The second-stage wheel set includes three second-stage planetary gears 19 evenly arranged at the end of the connecting disk 21. The second-stage wheel set surrounds the sun gear 11 and is meshed and installed with the sun gear 11.

[0029] The planetary gear mechanism 2 delivers power to the output shaft 3. The output shaft 3 includes a shaft body 26 which is rotatably mounted at the oil seal seat 13 by two bearings. The setting of the two bearings can increase the connection area of the output shaft 3 at the oil seal seat 13, thus ensuring the stability of the installation of the output shaft 3. An oil seal 27 sleeved on the shaft body 26 is provided at the end of the oil seal seat 13. A positioning seat is installed at the end of the shaft body 26 extending out of the oil seal 27 seat. The first-stage gear set is rotatably mounted on the positioning seat. A positioning hole is opened at the center of the positioning seat. The support columns are respectively rotatably mounted at the positioning hole through needle roller bearings 29 and ball bearings 30. The needle roller bearings 29 and the ball bearings 30 are spaced by a shaft collar 25. The setting of the needle roller bearings 29 and the ball bearings 30 can ensure that the support columns are rotatably mounted at the end of the output shaft 3, and at the same time can increase the connection area of the support columns in the positioning hole, thus ensuring the stability of the support columns and avoiding radial shaking of the support columns. A shaft collar 25 is provided between the needle roller bearings 29 and the ball bearings 30 to avoid friction between the needle roller bearings 29 and the ball bearings 30. A washer 31 sleeved on the support column and used to block the ball bearing 30 is provided at the positioning hole. The washer 31 can space the contact between the ball bearing 30 and the outside, and at the same time can fix the axial position of the roller bearing on the support column. A shaft collar 25 is provided between the washer 31 and the connection disk 21, and the shaft collar 25 can fix the axial position of the washer 31 on the support column. A hole card 33 sleeved on the support column and used to block the ball bearing 30 is also provided at the positioning hole. The outer diameter of the hole card 33 is larger than the outer diameter of the washer 31. That is to say, the washer 31 blocks the inner ring of the ball bearing 30, and the hole card 33 blocks the outer ring of the ball bearing 30. A shaft collar 25 for limiting the axial position on the support column is provided at the end of the connection disk 21. The axial position of the connection disk 21 on the support column is fixed by the shaft collar 25, and the position of the support column on the output shaft 3 is fixed, thus avoiding shaking of the connection disk 21 on the support column.

[0030] When the utility model is in use, the operator can use the corresponding motor 1 according to the actual situation. The use of the motor 1 can realize the electric power input of power. The electric power input is convenient for control and management. At the same time, the forward and reverse rotation of the motor 1 can be controlled, so as to realize the in-situ steering of the agricultural machinery. The power of the motor 1 is transmitted to the planetary gear mechanism 2 through the motor rotating shaft 9. The sun gear 11 on the motor rotating shaft 9 transmits the power to the secondary planetary gear 19. The secondary planetary gear 19 meshes with the internal teeth 17 of the ring gear 16. The sun gear 11 drives the rotation of the secondary planetary gear 19. At the same time, the secondary planetary gear 19 rotates in cooperation with the internal teeth 17 inside the ring gear 16, and the connecting disk 21 will also rotate accordingly. The rotation of the connecting disk 21 drives the transmission wheel 23 of the connecting disk 21 to rotate. The rotation of the transmission wheel 23 drives the rotation of the primary planetary gear 18. The primary planetary gear 18 meshes with the internal teeth 17 of the ring gear 16. The rotation of the primary planetary gear 18 inside the ring gear 16 drives the output shaft 3 to rotate, so as to realize the transmission of power. The setting of the primary gear set and the secondary gear set can convert the high-speed low-torque of the motor 1 into low-speed high-torque. The power of the motor 1 is transmitted to the output shaft 3 through the primary gear set and the secondary gear set. Since the output shaft 3 is rotatably installed on the oil sealing seat 13, the primary gear set is rotatably installed on the output shaft 3, the connecting disk 21 is rotatably installed on the support column, and the secondary gear set is rotatably installed on the connecting disk 21, which ensures the centering stability and balance of the connection between the primary gear set and the secondary gear set, and avoids the offset of the planetary gear during power transmission, thus preventing power transmission consumption and instability.

[0031] The above is only the preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model, according to the technical solution of the utility model and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the utility model.

Claims

1. A power device for agricultural machinery, characterized in that, It includes a motor (1). A planetary gear mechanism (2) is provided on the power output end of the motor (1). An output shaft (3) is fitted and installed on the planetary gear mechanism (2). The planetary gear mechanism (2) includes an oil seal seat (13) sleeved on the output shaft (3), a middle coupling cover (6) installed on the power output end of the motor (1), and a gear ring (16) provided between the oil seal seat (13) and the middle coupling cover (6). A support column is rotatably installed at the end of the output shaft (3) located inside the gear ring (16). A first-stage gear set that circumferentially arranges the transmission wheel (23) is further provided at the end of the output shaft (3). A connecting disk (21) is rotatably installed at the end of the support column. A transmission wheel (23) that mates with the first-stage gear set is provided on one end face of the connecting disk (21). A second-stage gear set that mates with the power output end of the motor (1) is provided on the other end face of the connecting disk (21).

2. The power device for agricultural machinery according to claim 1, characterized in that, The output shaft (3) includes a shaft body (26). The shaft body (26) is rotatably installed at the oil seal seat (13) through two bearings. An oil seal (27) sleeved on the shaft body (26) is provided at the end of the oil seal seat (13). A positioning seat is installed at the end of the shaft body (26) extending out of the oil seal (27) seat. The first-stage gear set is rotatably installed on the positioning seat. A positioning hole is opened at the center of the positioning seat. The support columns are respectively rotatably installed at the positioning hole through needle roller bearings (29) and ball bearings (30). The needle roller bearings (29) and the ball bearings (30) are spaced by a shaft clip (25). A washer (31) sleeved on the support column and used to block the ball bearing (30) is provided at the positioning hole. A shaft clip (25) is provided between the washer (31) and the connecting disk (21). A hole clip (33) sleeved on the support column and used to block the ball bearing (30) is further provided at the positioning hole. A shaft clip (25) that limits the axial position on the support column is provided at the end of the connecting disk (21).

3. A power device for agricultural machinery according to claim 1, characterized in that, The motor (1) includes a motor housing (4). The motor housing (4) is a columnar housing with openings at both ends. A number of positioning cylinders (7) surrounding the axial direction of the motor housing (4) are provided on the outside of the motor housing (4). A motor bottom shell (5) is provided at one end of the motor housing (4). The other end of the motor housing (4) is connected to the middle coupling cover (6). Positioning seats corresponding to the positioning cylinders (7) are provided on the outsides of the motor bottom shell (5) and the middle coupling cover (6). A motor rotating shaft (9) is rotatably installed inside the motor housing (4). A permanent magnet (10) is provided on the motor rotating shaft (9). One end of the motor rotating shaft (9) is rotatably installed at the inner end of the motor bottom shell (5) through a bearing. The other end of the motor rotating shaft (9) is rotatably installed on the middle coupling cover (6) through a bearing. And a sun gear (11) that is fitted and installed with the second-stage gear set is installed on the motor rotating shaft (9) extending out of the middle coupling cover (6).

4. A power device for agricultural machinery according to claim 1, characterized in that, The interior of the ring gear (16) is provided with internal teeth (17). The axial direction of the internal teeth (17) is parallel to the axial direction of the ring gear (16). The internal teeth (17) are respectively meshed and installed with the first-stage gear set and the second-stage gear set. The end of the ring gear (16) is evenly provided with a number of fixing holes (20). The axial direction of the fixing holes (20) is parallel to the axial direction of the ring gear (16).

5. A power device for agricultural machinery according to claim 1, characterized in that, The connecting disc (21) includes a disc body. The outer diameter of the disc body is smaller than the inner diameter of the ring gear (16). One end of the disc body is provided with an outwardly extending transmission column (32). The transmission wheel (23) is fixedly installed on the transmission column (32). The second-stage gear set is rotatably installed at the other end of the disc body. There are three second-stage gear sets. The second-stage gear sets are arranged around the sun gear (11). The second-stage gear sets are meshed and installed with the sun gear (11).

6. The power device for agricultural machinery according to claim 1, characterized in that, The center of the oil seal seat (13) is provided with an outwardly convex mounting seat. An output through hole for passing the output shaft (3) is provided on the mounting seat. The oil seal seat (13) is provided with a number of mounting posts. Threaded holes are provided on the mounting posts. The mounting posts and the mounting seat are connected by a reinforcing rib (12). The oil seal seat (13) is provided with a number of encapsulation through holes corresponding to the fixing holes (20).

7. A power device for agricultural machinery according to claim 1, characterized in that, The periphery of the intermediate joint cover (6) is provided with connection holes corresponding to the fixing holes (20). A bearing cooperating with the shaft of the motor (1) is installed in the middle of the intermediate joint cover (6). The ends of the oil seal seat (13) and the intermediate joint cover (6) are both provided with positioning edges (15) extending towards each other. The inner diameter of the positioning edge (15) is adapted to the inner diameter of the ring gear (16).

8. A power device for agricultural machinery according to claim 1, characterized in that, A number of reinforcing ribs (12) are provided on the motor housing (4) between adjacent positioning cylinders (7). The axial direction of the reinforcing ribs (12) is parallel to the axial direction of the motor rotating shaft (9).

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