Transmission system and engineering machine

Abstract

The utility model belongs to engineering machinery technical field discloses transmission system and engineering machinery. Transmission system includes output shaft, first walking motor, first input shaft, first deceleration subassembly, second walking motor, second input shaft and second deceleration subassembly, wherein, output shaft links with walking system, first walking motor links with first input shaft, and first input shaft is connected with output shaft transmission through first deceleration subassembly, second walking motor links with second input shaft, and second input shaft is connected with output shaft transmission through second deceleration subassembly. Through first walking motor and second walking motor cooperation and drive output shaft, can ensure that first walking motor and second walking motor all work in high -efficient area, and when one of deceleration subassembly shifts, the deceleration subassembly of not shifting corresponding walking motor can carry out compensation to the power of the motor of the deceleration subassembly of shifting corresponding, guarantees that shifting power is not interrupted.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a transmission system and engineering machinery. Background Technology

[0002] Traditional tractor chassis transmission systems include a travel motor and a travel reduction gear assembly. The travel motor drives the travel system through the travel reduction gear assembly. In existing technologies, the number of both the travel motor and the travel reduction gear assembly is usually set to one. This cannot guarantee that the travel motor will always operate in the high-efficiency range, and there will be a power interruption when the travel reduction gear assembly shifts gears. Utility Model Content

[0003] The purpose of this utility model is to provide a transmission system and engineering machinery that can ensure that both the first travel motor and the second travel motor work in the high-efficiency range and ensure that the shifting power is not interrupted.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] The transmission system includes:

[0006] The output shaft is used to connect to the walking system.

[0007] The system comprises a first walking motor, a first input shaft, and a first reduction gear assembly. The first walking motor is connected to the first input shaft, and the first input shaft is connected to the output shaft via the first reduction gear assembly.

[0008] The system comprises a second travel motor, a second input shaft, and a second reduction gear assembly. The second travel motor is connected to the second input shaft, and the second input shaft is connected to the output shaft via the second reduction gear assembly.

[0009] As a preferred technical solution for the transmission system, the first reduction assembly includes a planetary gear set and a first shifting mechanism. The planetary gear set includes a sun gear, planet gears, a planet carrier, and a ring gear. The sun gear is connected to the first input shaft, and the planet carrier or the ring gear is connected to the output shaft. The first shifting mechanism is used to control the power transmission route of the planetary gear set.

[0010] As a preferred technical solution for the transmission system, the planetary carrier is connected to the output shaft, the first shifting mechanism includes a first gear, a second gear, a third gear and a first sliding sleeve, the first gear is connected to the gear ring, the second gear is fixedly disposed, the third gear is connected to the first input shaft, and the first sliding sleeve is used to control the first gear to selectively engage with the second gear or with the third gear.

[0011] As a preferred technical solution for the transmission system, it also includes a first transmission gear set, which includes a first driving transmission gear and a first driven transmission gear meshing with each other. The first driving transmission gear is fixedly sleeved on the first input shaft, the first driven transmission gear is loosely sleeved on the output shaft, the sun gear is loosely sleeved on the output shaft and connected to the first driven transmission gear, the first gear, the second gear and the third gear are all loosely sleeved on the output shaft, and the third gear is connected to the first driven transmission gear.

[0012] As a preferred technical solution for the transmission system, the second reduction assembly includes a first reduction gear set, a second reduction gear set, and a second shifting mechanism. The first reduction gear set includes a meshing first driving reduction gear and a first driven reduction gear, with the first driven reduction gear fixedly sleeved on the output shaft. The second reduction gear set includes a meshing second driving reduction gear and a second driven reduction gear, with the second driven reduction gear fixedly sleeved on the output shaft. The second shifting mechanism is used to control the power of the second input shaft to be selectively transmitted to the output shaft via the first reduction gear set or the second reduction gear set.

[0013] As a preferred technical solution for the transmission system, the second shifting mechanism includes a fourth gear and a second sliding sleeve. The fourth gear is connected to the second input shaft, and the second sliding sleeve is used to control the fourth gear to selectively engage with the first active reduction gear or with the second active reduction gear.

[0014] As a preferred technical solution for the transmission system, it also includes a second transmission gear set and an intermediate shaft. The second transmission gear set includes a second driving transmission gear and a second driven transmission gear that mesh with each other. The second driving transmission gear is fixedly sleeved on the second input shaft, and the second driven transmission gear is fixedly sleeved on the intermediate shaft. The first driving reduction gear and the second driving reduction gear are both loosely sleeved on the intermediate shaft, and the fourth gear is fixedly sleeved on the intermediate shaft.

[0015] As a preferred technical solution for the transmission system, the output component of the first reduction assembly is connected to the first driven reduction gear.

[0016] As a preferred technical solution for the transmission system, it also includes a PTO motor, a third input shaft, a PTO reduction assembly, and a PTO output shaft. The PTO motor is connected to the third input shaft, and the third input shaft is connected to the PTO output shaft through the PTO reduction assembly.

[0017] Construction machinery, including the transmission system described in any of the above embodiments.

[0018] The beneficial effects of this utility model are:

[0019] This invention provides a transmission system including an output shaft, a first travel motor, a first input shaft, a first reduction gear assembly, a second travel motor, a second input shaft, and a second reduction gear assembly. The output shaft is connected to the travel system; the first travel motor is connected to the first input shaft, which is connected to the output shaft via the first reduction gear assembly; the second travel motor is connected to the second input shaft, which is connected to the output shaft via the second reduction gear assembly. By coordinating the first and second travel motors to drive the output shaft, it is ensured that both motors operate in their high-efficiency range. Furthermore, when one reduction gear assembly shifts gears, the corresponding travel motor of the unshifted reduction gear assembly can compensate for the power of the motor corresponding to the shifted reduction gear assembly, ensuring uninterrupted power during gear shifting. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the transmission system provided in an embodiment of the present invention.

[0021] In the picture:

[0022] 11. First walking motor; 12. First input shaft; 131. First driving transmission gear; 132. First driven transmission gear; 141. Sun gear; 142. Planet gear; 143. Planet carrier; 144. Gear ring; 151. First gear; 152. Second gear; 153. Third gear; 154. First sliding sleeve;

[0023] 21. Second travel motor; 22. Second input shaft; 231. Second drive gear; 232. Second driven gear; 24. Intermediate shaft; 251. First drive reduction gear; 252. First driven reduction gear; 261. Second drive reduction gear; 262. Second driven reduction gear; 271. Fourth gear; 272. Second sliding sleeve;

[0024] 30. Output shaft;

[0025] 41. PTO motor; 42. Third input shaft. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] like Figure 1 As shown, this embodiment of the present invention provides a transmission system including an output shaft 30, a first travel motor 11, a first input shaft 12, a first reduction gear assembly, a second travel motor 21, a second input shaft 22, and a second reduction gear assembly. The output shaft 30 is connected to the travel system; the first travel motor 11 is connected to the first input shaft 12, which is connected to the output shaft 30 via the first reduction gear assembly; the second travel motor 21 is connected to the second input shaft 22, which is connected to the output shaft 30 via the second reduction gear assembly. By having the first travel motor 11 and the second travel motor 21 collaboratively drive the output shaft 30, it can be ensured that both the first travel motor 11 and the second travel motor 21 operate in their high-efficiency range. Furthermore, when one of the reduction gear assemblies shifts gears, the travel motor corresponding to the unshifted reduction gear assembly can compensate for the power of the motor corresponding to the shifted reduction gear assembly, ensuring uninterrupted shifting power.

[0031] In this embodiment, the first reduction assembly includes a planetary gear set and a first shifting mechanism. The planetary gear set includes a sun gear 141, planet gears 142, a planet carrier 143, and a ring gear 144. The sun gear 141 is the input component of the first reduction assembly and is connected to the first input shaft 12. Optionally, the sun gear 141 can be connected to the first input shaft 12 via a first transmission gear set. The first transmission gear set includes a meshing first driving transmission gear 131 and a first driven transmission gear 132. The first driving transmission gear 131 is fixedly mounted on the first input shaft 12, the first driven transmission gear 132 is loosely mounted on the output shaft 30, and the sun gear 141 is loosely mounted on the output shaft 30 and connected to the first driven transmission gear 132. Alternatively, the sun gear 141 can also be directly connected to the first input shaft 12. The planet carrier 143 or the ring gear 144 is the output component of the first reduction assembly and is connected to the output shaft 30. The first shifting mechanism is used to control the power transmission path of the planetary gear set.

[0032] In this embodiment, the planetary carrier 143 is the output component of the first reduction gear assembly, and the planetary carrier 143 is connected to the output shaft 30. The first shifting mechanism includes a first gear 151, a second gear 152, a third gear 153, and a first sliding sleeve 154. The first gear 151, the second gear 152, and the third gear 153 are all loosely fitted on the output shaft 30. The first gear 151 is connected to the gear ring 144, the second gear 152 is fixedly installed, and the third gear 153 is connected to the first driven transmission gear 132. The first sliding sleeve 154 is used to control the first gear 151 to selectively engage with the second gear 152 or with the third gear 153. When the first sliding sleeve 154 engages the first gear 151 with the second gear 152, the power of the first travel motor 11 is transmitted to the output shaft 30 via the first input shaft 12, the first transmission gear set, the sun gear 141, the planetary gears 142, and the planetary carrier 143. When the first sliding sleeve 154 engages the first gear 151 with the third gear 153, the power of the first travel motor 11 is transmitted to the output shaft 30 via the first output shaft 30, the first transmission gear set, and the planetary gear set as a whole. In other embodiments, the gear ring 144 may be the output component of the first reduction assembly. The gear ring 144 is connected to the output shaft 30. Correspondingly, the first gear 151 is connected to the planetary carrier 143, the second gear 152 is fixedly installed, and the third gear 153 is connected to the first input shaft 12. The first sliding sleeve 154 is used to control the first gear 151 to selectively engage with the second gear 152 or with the third gear 153.

[0033] In this embodiment, the second reduction assembly includes a first reduction gear set, a second reduction gear set, and a second shifting mechanism. The first reduction gear set includes a meshing first driving reduction gear 251 and a first driven reduction gear 252, with the first driven reduction gear 252 fixedly sleeved on the output shaft 30. The second reduction gear set includes a meshing second driving reduction gear 261 and a second driven reduction gear 262, with the second driven reduction gear 262 fixedly sleeved on the output shaft 30. The second shifting mechanism is used to control the power of the second input shaft 22 to be selectively transmitted to the output shaft 30 via the first reduction gear set or the second reduction gear set. Optionally, the transmission system further includes a second transmission gear set and an intermediate shaft 24. The second transmission gear set includes a meshing second driving transmission gear 231 and a second driven transmission gear 232. The second driving transmission gear 231 is fixedly sleeved on the second input shaft 22, and the second driven transmission gear 232 is fixedly sleeved on the intermediate shaft 24. The first driving reduction gear 251 and the second driving reduction gear 261 are both loosely sleeved on the intermediate shaft 24, and the fourth gear 271 is fixedly sleeved on the intermediate shaft 24. Alternatively, the first driving reduction gear 251 and the second driving reduction gear 261 can also be directly loosely sleeved on the second input shaft 22.

[0034] In this embodiment, the second shifting mechanism includes a fourth gear 271 and a second sliding sleeve 272. The fourth gear 271 is fixedly sleeved on the intermediate shaft 24, and the second sliding sleeve 272 is used to control the fourth gear 271 to selectively engage with the first active reduction gear 251 or with the second active reduction gear 261. When the second sliding sleeve 272 engages the fourth gear 271 with the first active reduction gear 251, the power of the second travel motor 21 is transmitted to the output shaft 30 via the second input shaft 22, the second transmission gear set, the intermediate shaft 24, and the first reduction gear set. When the second sliding sleeve 272 engages the fourth gear 271 with the second active reduction gear 261, the power of the second travel motor 21 is transmitted to the output shaft 30 via the second input shaft 22, the second transmission gear set, the intermediate shaft 24, and the second reduction gear set.

[0035] In this embodiment, the output component of the first reduction assembly is connected to the first driven reduction gear 252. Alternatively, in other embodiments, the output component of the first reduction assembly may be directly connected to the output shaft 30.

[0036] The first and second reduction gears work together to achieve four gears. Specifically, when the first sliding sleeve 154 engages the first gear 151 with the second gear 152, and the second sliding sleeve 272 engages the fourth gear 271 with the first drive reduction gear 251, the transmission system is in first gear. When the first sliding sleeve 154 engages the first gear 151 with the second gear 152, and the second sliding sleeve 272 engages the fourth gear 271 with the second drive reduction gear 261, the transmission system is in second gear. When the first sliding sleeve 154 engages the first gear 151 with the third gear 153, and the second sliding sleeve 272 engages the fourth gear 271 with the first drive reduction gear 251, the transmission system is in third gear. When the first sliding sleeve 154 engages the first gear 151 with the third gear 153, and the second sliding sleeve 272 engages the fourth gear 271 with the second drive reduction gear 261, the transmission system is in fourth gear.

[0037] When the transmission system is working, firstly, the speeds of the first travel motor 11 and the second travel motor 21 are monitored in real time. When the speed of either travel motor exceeds the preset operating range, a gear shift is initiated to ensure that both the first travel motor 11 and the second travel motor 21 operate in their high-efficiency range. Secondly, the torque distribution between the first travel motor 11 and the second travel motor 21 is dynamically adjusted to maintain their efficiency above 85%, thus ensuring that both the first travel motor 11 and the second travel motor 21 operate in their high-efficiency range. Furthermore, when one of the reduction gears shifts gears, the corresponding travel motor of the unshifted reduction gear can compensate for the power loss of the motor corresponding to the shifted reduction gear, ensuring uninterrupted power during gear shifting.

[0038] In addition, in this embodiment, the transmission system also includes a PTO motor 41, a third input shaft 42, a PTO reduction assembly, and a PTO output shaft. The PTO motor 41 is connected to the third input shaft 42, and the third input shaft 42 is connected to the PTO output shaft through the PTO reduction assembly. The PTO output shaft is used to connect to the PTO working device. Optionally, the intermediate shaft 24 has an axially through-hole, through which the third input shaft 42 passes, making the overall structure more compact.

[0039] This utility model embodiment also provides an engineering machine, including the above-described transmission system. Optionally, the engineering machine is a tractor.

[0040] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A transmission system, characterized in that, include: Output shaft (30) is used to connect to the walking system; The system comprises a first walking motor (11), a first input shaft (12), and a first reduction gear assembly. The first walking motor (11) is connected to the first input shaft (12), and the first input shaft (12) is connected to the output shaft (30) via the first reduction gear assembly. The second walking motor (21), the second input shaft (22), and the second reduction assembly are connected. The second walking motor (21) is connected to the second input shaft (22), and the second input shaft (22) is connected to the output shaft (30) through the second reduction assembly.

2. The transmission system according to claim 1, characterized in that, The first reduction gear assembly includes a planetary gear set and a first shifting mechanism. The planetary gear set includes a sun gear (141), planet gears (142), a planet carrier (143), and a ring gear (144). The sun gear (141) is connected to the first input shaft (12), and the planet carrier (143) or the ring gear (144) is connected to the output shaft (30). The first shifting mechanism is used to control the power transmission route of the planetary gear set.

3. The transmission system according to claim 2, characterized in that, The planetary carrier (143) is connected to the output shaft (30). The first shifting mechanism includes a first gear (151), a second gear (152), a third gear (153), and a first sliding sleeve (154). The first gear (151) is connected to the gear ring (144). The second gear (152) is fixedly installed. The third gear (153) is connected to the first input shaft (12). The first sliding sleeve (154) is used to control the first gear (151) to selectively engage with the second gear (152) or with the third gear (153).

4. The transmission system according to claim 3, characterized in that, It also includes a first transmission gear set, which includes a first driving transmission gear (131) and a first driven transmission gear (132) meshing with each other. The first driving transmission gear (131) is fixedly sleeved on the first input shaft (12), and the first driven transmission gear (132) is loosely sleeved on the output shaft (30). The sun gear (141) is loosely sleeved on the output shaft (30) and connected to the first driven transmission gear (132). The first gear (151), the second gear (152) and the third gear (153) are all loosely sleeved on the output shaft (30), and the third gear (153) is connected to the first driven transmission gear (132).

5. The transmission system according to claim 1, characterized in that, The second reduction assembly includes a first reduction gear set, a second reduction gear set, and a second shifting mechanism. The first reduction gear set includes a meshing first driving reduction gear (251) and a first driven reduction gear (252). The first driven reduction gear (252) is fixedly sleeved on the output shaft (30). The second reduction gear set includes a meshing second driving reduction gear (261) and a second driven reduction gear (262). The second driven reduction gear (262) is fixedly sleeved on the output shaft (30). The second shifting mechanism is used to control the power of the second input shaft (22) to be selectively transmitted to the output shaft (30) via the first reduction gear set or the second reduction gear set.

6. The transmission system according to claim 5, characterized in that, The second shifting mechanism includes a fourth gear (271) and a second sliding sleeve (272). The fourth gear (271) is connected to the second input shaft (22), and the second sliding sleeve (272) is used to control the fourth gear (271) to selectively engage with the first active reduction gear (251) or with the second active reduction gear (261).

7. The transmission system according to claim 6, characterized in that, It also includes a second transmission gear set and an intermediate shaft (24). The second transmission gear set includes a second driving transmission gear (231) and a second driven transmission gear (232) that mesh with each other. The second driving transmission gear (231) is fixedly sleeved on the second input shaft (22), and the second driven transmission gear (232) is fixedly sleeved on the intermediate shaft (24). The first driving reduction gear (251) and the second driving reduction gear (261) are both loosely sleeved on the intermediate shaft (24). The fourth gear (271) is fixedly sleeved on the intermediate shaft (24).

8. The transmission system according to claim 5, characterized in that, The output component of the first reduction assembly is connected to the first driven reduction gear (252).

9. The transmission system according to any one of claims 1-8, characterized in that, It also includes a PTO motor (41), a third input shaft (42), a PTO reduction assembly, and a PTO output shaft. The PTO motor (41) is connected to the third input shaft (42), and the third input shaft (42) is connected to the PTO output shaft through the PTO reduction assembly.

10. Construction machinery, characterized in that, Includes the transmission system as described in any one of claims 1-9.

Images