Power device for agricultural machinery

Abstract

The invention 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 mounted on the planet wheel mechanism in a matched manner, the planet wheel mechanism comprises an oil sealing seat and a gear ring, and a supporting column is rotatably mounted at the end part of the output shaft arranged 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. The problems that a hydraulic motor is high in follow-up maintenance cost and high in management difficulty can be solved, meanwhile, the problems of deviation and large power consumption occurring during power transmission of a planet wheel can be solved, forward and reverse rotation of the motor can be achieved on agricultural machinery, in-situ steering and speed controllability of a vehicle can be achieved, installation is easy, practicability is high, and the application range is wide.

Description

Technical Field

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

[0002] Most agricultural machinery uses fuel engines as power, and transmits power to the corresponding structure to achieve the purpose of driving agricultural machinery and equipment, converting the engine's 3600 rpm into 80 rpm, which is roughly a speed ratio of 1:50. A gearbox is used to transmit power. Planetary gears refer to gear systems that can rotate around their own rotation axes like fixed-axis gears, and their rotation axes also rotate around the axes of other gears with the planetary carrier. At this stage, most planetary gears are powered by hydraulic motors, but hydraulic motors are difficult to manage and have high subsequent maintenance costs. At the same time, they cannot adapt to some special environments, so they cannot achieve forward and reverse rotation, and thus cannot achieve on-site steering of agricultural machinery. For the existing cantilever planetary gear frame structure, first, the planetary gear is cantilevered and has poor torsional rigidity; secondly, most of the planetary gears are one-stage, and the planetary gears are respectively connected to the power components and the power output components. For the power transmission of multi-stage planetary gears, some planetary gears will be suspended inside, and the planetary gears will be offset during power transmission, resulting in power transmission consumption and instability. Summary of the invention

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

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A power device for agricultural machinery, which has the structural characteristics of comprising a motor, a planetary gear mechanism being provided on the power output end of the motor, an output shaft being mounted on the planetary gear mechanism, the planetary gear mechanism comprising an oil seal seat mounted on the output shaft, a center cover mounted on the power output end of the motor and a gear ring arranged between the oil seal seat and the center cover, a support column being rotatably mounted on the end of the output shaft arranged inside the gear ring, a primary wheel group being ring-arranged around the transfer wheel at the end of the output shaft, a connecting disk being rotatably mounted on the end of the support column, a transfer wheel being matched with the primary wheel group being provided on one end face of the connecting disk, and a secondary wheel group being matched with the power output end of the motor being provided on the other end face of the connecting disk.

[0006] The beneficial effects of the present invention are as follows: the use of an electric motor can realize the electrical input of power, and the electrical input is easy to control and manage. At the same time, the forward and reverse rotation of the motor can be controlled, thereby realizing the on-the-spot steering of the agricultural machinery. The setting of the primary wheel group and the secondary wheel group can convert the high-speed and low-torque of the motor into low-speed and high-torque. Compared with the complex planetary gears in the prior art, the power of the motor is transmitted to the output shaft through the primary wheel group and the secondary wheel group. Since the output shaft is rotatably mounted on the oil sealing seat, the primary wheel group is rotatably mounted on the output shaft, the connecting plate is rotatably mounted on the support column, and the secondary wheel group is rotatably mounted on the connecting plate, thereby ensuring the centering stability and balance of the connection between the primary wheel group and the secondary wheel group, avoiding the deviation of the planetary gear during power transmission, thereby causing power transmission consumption and instability, achieving better conversion effect, reducing production costs and subsequent maintenance costs, and being able to solve the problems of high subsequent maintenance costs and high management difficulties of hydraulic motors.

[0007] As an improved technical solution, the output shaft includes a shaft body, which is rotatably mounted on an oil seal seat through two bearings, an end of the oil seal seat is provided with an oil seal sleeved on the shaft body, a positioning seat is installed on the end of the shaft body extending from the oil seal seat, the primary wheel group is rotatably mounted on the positioning seat, a positioning hole is provided in the center of the positioning seat, the support column is rotatably mounted on the positioning hole through a needle bearing and a ball bearing respectively, the needle bearing and the ball bearing are spaced apart by a shaft clamp, a washer sleeved on the support column and used to seal the ball bearing is provided at the positioning hole, a shaft clamp is provided between the washer and the connecting disk, the positioning hole is also provided with a hole clamp sleeved on the support column and used to seal the ball bearing, and the end of the connecting disk is provided with a shaft clamp that limits the axial position on the support column.

[0008] As an improved technical solution, the motor includes a motor housing, which is a cylindrical shell with openings at both ends. The outside of the motor housing is provided with a plurality of positioning cylinders surrounding the motor housing in the axial direction. One end of the motor housing is provided with a motor bottom shell, and the other end of the motor housing is connected to the center cover. The outsides of the motor bottom shell and the center cover are provided with positioning seats corresponding to the positioning cylinders. A motor shaft is rotatably installed inside the motor housing, and a magnetic steel is provided on the motor shaft. One end of the motor shaft is rotatably installed on the inner end of the motor bottom shell through a bearing, and the other end of the motor shaft is rotatably installed on the center cover through a bearing, and a sun gear that is installed in cooperation with the secondary wheel set is installed on the motor shaft extending out of the center cover.

[0009] As an improved technical solution, the gear ring is provided with internal teeth, 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 primary wheel set and the secondary wheel set, and a number 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 disk includes a disk body, the outer diameter of the disk body is smaller than the inner diameter of the gear ring, an outwardly extending transmission column is provided at one end of the disk body, the transmission wheel is fixedly mounted on the transmission column, and the secondary wheel group is rotatably mounted at the other end of the disk body. There are three secondary wheel groups, which are arranged around the sun wheel, and the secondary wheel group is meshed with the sun wheel.

[0011] As an improved technical solution, an outwardly protruding mounting seat is provided at the center of the oil sealing seat, an output through hole through which the output shaft can pass is provided on the mounting seat, a plurality of mounting columns are provided on the oil sealing seat, threaded holes are provided on the mounting columns, the mounting columns are connected to the mounting seat by reinforcing ribs, and a plurality of packaging through holes corresponding to the fixing holes are provided on the oil sealing seat.

[0012] As an improved technical solution, connection holes corresponding to the fixing holes are opened around the center cover, a bearing matching the motor shaft is installed in the middle of the center cover, and the ends of the oil seal seat and the ends of the center cover are provided with positioning edges extending toward each other, 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 shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 yes Figure 1 A schematic diagram of the main viewing direction structure;

[0016] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure in the AA direction;

[0017] Figure 4 yes Figure 1 A schematic diagram of the structure of the second wheel assembly viewed from above;

[0018] Figure 5 yes Figure 1 A schematic diagram of a top view of the structure of the first wheel assembly;

[0019] Figure 6 yes Figure 1Schematic diagram of the structure without the gear ring;

[0020] Figure 7 yes Figure 1 A schematic diagram of the structure of the output shaft;

[0021] Figure 8 yes Figure 1 A schematic diagram of the structure of the gear ring;

[0022] Fig. 9 yes Figure 1 A schematic diagram of the structure of the motor housing;

[0023] Fig.10 yes Figure 2 An enlarged structural diagram of part A;

[0024] Legend: 1. Motor, 2. Planetary gear mechanism, 3. Output shaft, 4. Motor housing, 5. Motor bottom shell, 6. Center cover, 7. Positioning cylinder, 8. Positioning seat, 9. Motor shaft, 10. Magnet, 11. Sun gear, 12. Reinforcement rib, 13. Oil seal seat, 15. Positioning edge, 16. Ring gear, 17. Inner gear, 18. Primary planetary gear, 19. Secondary planetary gear, 20. Fixing hole, 21. Connecting plate, 22. Support column, 23. Transfer wheel, 24. Support column, 25. Shaft clamp, 26. Shaft body, 27. Oil seal, 28. Positioning seat, 29. Needle bearing, 30. Ball bearing, 31. Washer, 32. Transfer column, 33. Hole clamp. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Reference Figure 1-Figure 10 As shown, a power device for agricultural machinery includes a motor 1, a planetary gear mechanism 2 is provided on the power output end of the motor 1, and an output shaft 3 is mounted on the planetary gear mechanism 2. The motor 1 here can be a three-phase motor 1, so that the motor 1 can be rotated forward and reversely, that is, the equipment can be turned in situ.

[0027] The motor 1 includes a motor housing 4, which is a columnar housing with openings at both ends. A motor bottom housing 5 is provided at one end of the motor housing 4, and the other end of the motor housing 4 is connected to the center cover 6. A plurality of positioning cylinders 7 surrounding the motor housing 4 in the axial direction are provided on the outside of the motor housing 4. Positioning seats corresponding to the positioning cylinders 7 are provided on the outside of the motor bottom housing 5 and the center cover 6. A motor shaft 9 is rotatably installed inside the motor housing 4, and a magnetic steel 10 is provided on the motor shaft 9. One end of the motor shaft 9 is rotatably installed on the inner end of the motor bottom housing 5 through a bearing, and the other end of the motor shaft 9 is rotatably installed on the center cover 6 through a bearing, and a sun gear 11 is installed on the motor shaft 9 extending from the center cover 6. A plurality 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 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 seal seat 13 and a center cover 6. A gear ring 16 is provided between the oil seal seat 13 and the center cover 6. The first-stage wheel set and the second-stage wheel set arranged in front and behind are matched and installed in the gear ring 16. The inner part of the gear ring 16 is provided with internal teeth 17. The axial direction of the internal teeth 17 is parallel to the axial direction of the gear ring 16. The end of the gear ring 16 is evenly provided with a plurality of fixing holes 20. 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 mounted on the oil seal seat 13. The center cover 6 is mounted on the power output end of the motor 1. The periphery of the center cover 6 is provided with connecting holes corresponding to the fixing holes 20. The middle part of the center cover 6 is provided with a bearing matched with the shaft of the motor 1. The ends of the oil seal seat 13 and the ends of the center cover 6 are provided with positioning edges 15 extending toward each other. The inner diameter of the positioning edge 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 arranged inside the ring gear 16, and a primary wheel group around which the transfer wheel 23 is arranged is also provided at the end of the output shaft 3. The primary wheel group includes three primary planetary gears 18 evenly arranged at the end of the output shaft 3, and a connecting disk 21 is rotatably installed at the end of the support column. A transfer wheel 23 cooperating with the primary wheel group is provided on one end face of the connecting disk 21, and a secondary wheel group 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, and the outer diameter of the disk body is smaller than the inner diameter of the ring gear 16. An outwardly extending transfer column 32 is provided at one end of the disk body, and the transfer wheel 23 is fixedly installed on the transfer column 32. The secondary wheel group is rotatably installed at the other end of the disk body, and the secondary wheel group includes three secondary planetary gears 19 evenly arranged at the end of the connecting disk 21. The secondary wheel group is arranged around the sun gear 11, and the secondary wheel group is meshed with the sun gear 11.

[0029] The planetary gear mechanism 2 transmits power to the output shaft 3, and the output shaft 3 includes a shaft body 26, and the shaft body 26 is rotatably mounted on the oil seal seat 13 through two bearings. The setting of the two bearings can increase the connection area of ​​the output shaft 3 on the oil seal seat 13, thereby ensuring the stability of the installation of the output shaft 3. The end of the oil seal seat 13 is provided with an oil seal 27 sleeved on the shaft body 26, and the end of the shaft body 26 extending from the oil seal 27 seat is installed with a positioning seat, and the first-level wheel group is rotatably mounted on the positioning seat, and a positioning hole is opened in the center of the positioning seat. The support column is rotatably mounted at the positioning hole through a needle bearing 29 and a ball bearing 30 respectively, and the needle bearing 29 and the ball bearing 30 are spaced apart by a shaft clamp 25. The setting of the needle bearing 29 and the ball bearing 30 can ensure that the support column is rotatably mounted on the end of the output shaft 3, and at the same time can increase the connection area of ​​the support column in the positioning hole, thereby ensuring the stability of the support column, thereby avoiding radial shaking of the support column, the needle bearing 29 and A shaft clamp 25 is provided between the ball bearings 30 to avoid friction between the needle bearing 29 and the ball bearing 30. A washer 31 is provided at the positioning hole and is sleeved on the support column to seal the ball bearing 30. The washer 31 can separate the contact between the ball bearing 30 and the outside and fix the axial position of the roller bearing on the support column. A shaft clamp 25 is provided between the washer 31 and the connecting plate 21. The shaft clamp 25 can fix the axial position of the washer 31 on the support column. A sleeve is also provided at the positioning hole. A hole card 33 is installed on the support column and is used to seal the ball bearing 30. The outer diameter of the hole card 33 is larger than the outer diameter of the gasket 31. That is to say, the gasket 31 seals the inner ring of the ball bearing 30, and the hole card 33 seals the outer ring of the ball bearing 30. The end of the connecting disk 21 is provided with a shaft card 25 that limits the axial position on the support column. The axial position of the connecting disk 21 on the support column is fixed by the shaft card 25, and the position of the support column on the output shaft 3 is fixed, thereby preventing the connecting disk 21 from shaking on the support column.

[0030] When the present invention is in use, the operator can use the corresponding motor 1 according to actual conditions. The motor 1 can be used to realize the electric input of power, and the electric input is easy to control and manage. 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 shaft 9. The sun gear 11 on the motor shaft 9 transmits the power to the secondary planetary gear 19. The secondary planetary gear 19 is meshed with the inner 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 coordination with the inner teeth 17 inside the ring gear 16, and the connecting disk 21 also rotates. The rotation of the connecting disk 21 drives the transfer wheel 23 of the connecting disk 21 to rotate, and the rotation of the transfer wheel 23 drives the primary planetary gear 18 The primary planetary gear 18 is meshed with the inner teeth 17 of the ring gear 16, and the rotation of the primary planetary gear 18 in the ring gear 16 drives the output shaft 3 to rotate, thereby realizing power transmission. The setting of the primary wheel set and the secondary wheel set can convert the high-speed and low-torque of the motor 1 into low-speed and high-torque, and the power of the motor 1 is transmitted to the output shaft 3 through the primary wheel set and the secondary wheel set. Since the output shaft 3 is rotatably mounted on the oil seal seat 13, the primary wheel set is rotatably mounted on the output shaft 3, the connecting plate 21 is rotatably mounted on the support column, and the secondary wheel set is rotatably mounted on the connecting plate 21, thereby ensuring the centering stability and balance of the primary wheel set and the secondary wheel set, avoiding the deviation of the planetary gear during power transmission, thereby causing power transmission consumption and instability.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power device for agricultural machinery, characterized in that: The invention comprises a motor (1), wherein a planetary gear mechanism (2) is provided on the power output end of the motor (1), and an output shaft (3) is mounted on the planetary gear mechanism (2), wherein the planetary gear mechanism (2) comprises an oil seal seat (13) sleeved on the output shaft (3), a center link cover (6) mounted on the power output end of the motor (1), and a gear ring (16) arranged between the oil seal seat (13) and the center link cover (6), wherein a support column is rotatably mounted on the end of the output shaft (3) arranged inside the gear ring (16), wherein a primary wheel group around which a transmission wheel (23) is arranged is also provided at the end of the output shaft (3), wherein a connecting disc (21) is rotatably mounted on the end of the supporting disc, wherein a transmission wheel (23) matching with the primary wheel group is provided on one end surface of the connecting disc (21), and a secondary wheel group matching with the power output end of the motor (1) is provided on the other end surface of the connecting disc (21).

2. A power device for agricultural machinery according to claim 1, characterized in that: The output shaft (3) comprises a shaft body (26), the shaft body (26) is rotatably mounted on the oil seal seat (13) via two bearings, an end of the oil seal seat (13) is provided with an oil seal (27) sleeved on the shaft body (26), a positioning seat is installed at the end of the shaft body (26) extending from the oil seal (27) seat, the primary wheel set is rotatably mounted on the positioning seat, a positioning hole is provided at the center of the positioning seat, and the support column is rotatably mounted on the positioning seat via a needle bearing (29) and a ball bearing (30) respectively. At the positioning hole, the needle bearing (29) and the ball bearing (30) are spaced apart by an axle clamp (25); a washer (31) which is sleeved on the support column and used to seal the ball bearing (30) is provided at the positioning hole; an axle clamp (25) is provided between the washer (31) and the connecting plate (21); a hole clamp (33) which is sleeved on the support column and used to seal the ball bearing (30) is also provided at the positioning hole; and an axle clamp (25) which is limited to an axial position on the support column is provided at the end of the connecting plate (21).

3. A power device for agricultural machinery according to claim 1, characterized in that: The motor (1) comprises a motor housing (4), which is a columnar shell with openings at both ends. The motor housing (4) is provided with a plurality of positioning cylinders (7) surrounding the motor housing (4) in the axial direction on the outside. A motor bottom shell (5) is provided on one end of the motor housing (4), and the other end of the motor housing (4) is connected to the center cover (6). Positioning seats corresponding to the positioning cylinders (7) are provided on the outside of the motor bottom shell (5) and the center cover (6). A motor shaft (9) is rotatably mounted inside the motor housing (4), and a magnetic steel (10) is provided on the motor shaft (9). One end of the motor shaft (9) is rotatably mounted on the inner end of the motor bottom shell (5) through a bearing, and the other end of the motor shaft (9) is rotatably mounted on the center cover (6) through a bearing, and a sun gear (11) mounted in cooperation with the secondary wheel set is mounted on the motor shaft (9) extending out of the center cover (6).

4. A power device for agricultural machinery according to claim 1, characterized in that: The gear ring (16) is provided with internal teeth (17) inside, the axial direction of the internal teeth (17) is parallel to the axial direction of the gear ring (16), the internal teeth (17) are respectively meshed and installed with the primary wheel set and the secondary wheel set, and the end of the gear ring (16) is evenly provided with a plurality of fixing holes (20), the axial direction of the fixing holes (20) is parallel to the axial direction of the gear ring (16).

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

6. A power device for agricultural machinery according to claim 1, characterized in that: An outwardly convex mounting seat is provided at the center of the oil sealing seat (13), an output through hole through which the output shaft (3) can pass is provided on the mounting seat, a plurality of mounting posts are provided on the oil sealing seat (13), threaded holes are provided on the mounting posts, the mounting posts are connected to the mounting seat via reinforcing ribs (12), and a plurality of sealing through holes corresponding to the fixing holes (20) are provided on the oil sealing seat (13).

7. A power device for agricultural machinery according to claim 1, characterized in that: The periphery of the center cover (6) is provided with connection holes corresponding to the fixing holes (20); a bearing matched with the shaft of the motor (1) is installed in the middle of the center cover (6); the ends of the oil seal seat (13) and the ends of the center 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 gear ring (16).

8. A power device for agricultural machinery according to claim 1, characterized in that: A plurality 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 shaft (9).

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