Transmission system and engineering machinery

Abstract

The invention belongs to the technical field of engineering machinery, and discloses a transmission system and engineering machinery. The transmission system comprises an output shaft, a first walking motor, a first input shaft, a first speed reduction assembly, a second walking motor, a second input shaft and a second speed reduction assembly, and the output shaft is connected with the walking system; the first walking motor is connected with the first input shaft, and the first input shaft is in transmission connection with the output shaft through the first speed reduction assembly. The second walking motor is connected with the second input shaft, and the second input shaft is in transmission connection with the output shaft through the second speed reduction assembly. The first walking motor and the second walking motor cooperatively drive the output shaft, it can be ensured that the first walking motor and the second walking motor both work in an efficient area, when one speed reduction assembly shifts gears, the walking motor corresponding to the speed reduction assembly without shifting the gears can compensate power of the motor corresponding to the speed reduction assembly with the gear shifted, and the power of the motor corresponding to the speed reduction assembly with the gear shifted can be compensated. And the gear shifting power is ensured not to be interrupted.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a transmission system and engineering machinery. Background Art

[0002] Traditional tractor chassis transmission systems include a travel motor and a travel reduction assembly. The travel motor drives the travel system through the travel reduction assembly. In existing technologies, both the travel motor and the travel reduction assembly are typically configured as one each. This cannot guarantee that the travel motor always operates in its high-efficiency range, and power interruptions may occur when the travel reduction assembly shifts gears. Summary of the Invention

[0003] The object of the present invention is to provide a transmission system and engineering machinery, which can ensure that the first travel motor and the second travel motor both operate in a high-efficiency zone and ensure that the shifting power is not interrupted.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] Drive system, including:

[0006] Output shaft, used to connect with the travel system;

[0007] a first travel motor, a first input shaft, and a first reduction assembly, wherein the first travel motor is connected to the first input shaft, and the first input shaft is transmission-connected to the output shaft via the first reduction assembly;

[0008] A second travel motor, a second input shaft and a second reduction assembly, wherein the second travel motor is connected to the second input shaft, and the second input shaft is transmission-connected to the output shaft through the second reduction assembly.

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

[0010] As a preferred technical solution for the transmission system, the planetary carrier is connected to the output shaft, the first shift mechanism includes a first gear, a second gear, a third gear and a first sleeve, the first gear is connected to the ring gear, the second gear is fixed, the third gear is connected to the first input shaft, and the first 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 of the transmission system, it also includes a first transmission gear set, which includes a first driving transmission gear and a first driven transmission gear that are meshed 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 of the transmission system, the second reduction assembly includes a first reduction gear group, a second reduction gear group and a second shifting mechanism, the first reduction gear group includes a first active reduction gear and a first driven reduction gear that are meshed with each other, the first driven reduction gear is fixedly sleeved on the output shaft, the second reduction gear group includes a second active reduction gear and a second driven reduction gear that are meshed with each other, the second driven reduction gear is fixedly sleeved on the output shaft, and the second shifting mechanism is used to control the power of the second input shaft to be selectively transmitted to the output shaft through the first reduction gear group or the second reduction gear group.

[0013] As a preferred technical solution of 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 the second active reduction gear.

[0014] As a preferred technical solution of 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 are meshed 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 of the transmission system, the output member of the first reduction assembly is connected to the first driven reduction gear.

[0016] As an optimal 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] Engineering machinery, including the transmission system as described in any of the above solutions.

[0018] Beneficial effects of the present invention:

[0019] The present invention provides a transmission system, comprising an output shaft, a first travel motor, a first input shaft, a first reduction assembly, a second travel motor, a second input shaft, and a second reduction assembly, wherein the output shaft is connected to the travel system; the first travel motor is connected to the first input shaft, which is in transmission connection with the output shaft via the first reduction assembly; the second travel motor is connected to the second input shaft, which is in transmission connection with the output shaft via the second reduction assembly. The first and second travel motors cooperatively drive the output shaft, ensuring that both the first and second travel motors operate in a high-efficiency range, and when one of the reduction assemblies shifts gears, the travel motor corresponding to the unshifted reduction assembly can compensate for the power of the motor corresponding to the shifted reduction assembly, ensuring that the shifting power is not interrupted. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the principle of the transmission system provided by an embodiment of the present invention.

[0021] In the picture:

[0022] 11. First travel motor; 12. First input shaft; 131. First driving transmission gear; 132. First driven transmission gear; 141. Sun gear; 142. Planetary gears; 143. Planet carrier; 144. Ring gear; 151. First gear; 152. Second gear; 153. Third gear; 154. First sleeve;

[0023] 21. Second travel motor; 22. Second input shaft; 231. Second driving transmission gear; 232. Second driven transmission gear; 24. Intermediate shaft; 251. First driving reduction gear; 252. First driven reduction gear; 261. Second driving 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 DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0027] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0030] like Figure 1 As shown, an 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 assembly, a second travel motor 21, a second input shaft 22, and a second reduction 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 in transmission connection with the output shaft 30 via the first reduction assembly; the second travel motor 21 is connected to the second input shaft 22, which is in transmission connection with the output shaft 30 via the second reduction assembly. The coordinated driving of the output shaft 30 by the first and second travel motors 11 and 21 ensures that both the first and second travel motors 11 and 21 operate in a high-efficiency range. Furthermore, when one of the reduction assemblies shifts gears, the travel motor corresponding to the unshifted reduction assembly can compensate for the power of the motor corresponding to the shifted reduction assembly, ensuring uninterrupted shifting power.

[0031] In this embodiment, the first reduction gear assembly includes a planetary gear set and a first shifting mechanism. The planetary gear set includes a sun gear 141, planetary gears 142, a planet carrier 143, and a ring gear 144. Sun gear 141 is the input component of the first reduction gear assembly and is connected to the first input shaft 12. Alternatively, 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, sun gear 141 can be directly connected to the first input shaft 12. The planetary gear set 143 or the ring gear 144 is the output component of the first reduction gear 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 member of the first reduction gear assembly and 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 mounted on the output shaft 30. The first gear 151 is connected to the ring gear 144, the second gear 152 is fixed, 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 the third gear 153. When the first 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 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 ring gear 144 may be the output member of the first reduction assembly, connected to the output shaft 30. Accordingly, the first gear 151 is connected to the planetary carrier 143, the second gear 152 is fixedly disposed, and the third gear 153 is connected to the first input shaft 12. The first sleeve 154 is used to control the first gear 151 to selectively engage with the second gear 152 or the third gear 153.

[0033] In this embodiment, the second reduction gear assembly includes a first reduction gear group, a second reduction gear group and a second shifting mechanism. The first reduction gear group includes a first active reduction gear 251 and a first driven reduction gear 252 that are meshed with each other. The first driven reduction gear 252 is fixedly sleeved on the output shaft 30. The second reduction gear group includes a second active reduction gear 261 and a second driven reduction gear 262 that are meshed with each other. 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 through the first reduction gear group or the second reduction gear group. Optionally, the transmission system further 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 are meshed with each other. The second driving transmission gear 231 is fixedly sleeved on the second input shaft 22, 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 may 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 mounted on the intermediate shaft 24. The second sliding sleeve 272 is used to control the fourth gear 271 to selectively engage with the first active reduction gear 251 or 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 member of the first reduction assembly is connected to the first driven reduction gear 252. Alternatively, in other embodiments, the output member of the first reduction assembly may also be directly connected to the output shaft 30.

[0036] The cooperation between the first reduction assembly and the second reduction assembly can achieve four-speed adjustment. 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 active reduction gear 251, the transmission system is in the first gear state; 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 active reduction gear 261, the transmission system is in the second gear state; 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 active reduction gear 251, the transmission system is in the third gear state; 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 active reduction gear 261, the transmission system is in the fourth gear state.

[0037] When the transmission system is operating, it first monitors the speed of the first and second travel motors 11 and 21 in real time. If the speed of either travel motor exceeds the preset operating range, the gear is switched so that both the first and second travel motors 11 and 21 can operate in the high-efficiency range. Secondly, the torque distribution between the first and second travel motors 11 and 21 is dynamically adjusted to maintain the efficiency of the first and second travel motors 11 and 21 above 85%, thereby allowing both the first and second travel motors 11 and 21 to operate in the high-efficiency range. In addition, when one of the reduction gear components shifts, the corresponding travel motor of the unshifted reduction gear component can compensate for the power of the motor corresponding to the shifted reduction gear component, ensuring uninterrupted power during the shift.

[0038] 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, which is in turn connected to the PTO output shaft via 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 extending center hole, through which the third input shaft 42 extends, making the overall structure more compact.

[0039] An embodiment of the present invention further provides an engineering machine comprising the above-mentioned transmission system. Optionally, the engineering machine is a tractor.

[0040] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Transmission system, characterized in that, include: An output shaft (30) is used to be connected to a traveling system; A first travel motor (11), a first input shaft (12) and a first reduction assembly, wherein the first travel motor (11) is connected to the first input shaft (12), and the first input shaft (12) is transmission-connected to the output shaft (30) via the first reduction assembly; A second travel motor (21), a second input shaft (22) and a second reduction assembly, wherein the second travel motor (21) is connected to the second input shaft (22), and the second input shaft (22) is transmission-connected to the output shaft (30) via the second reduction assembly.

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

3. The transmission system according to claim 2, characterized in that: The planet carrier (143) is connected to the output shaft (30); the first shift mechanism comprises 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 ring gear (144); the second gear (152) is fixed; the third gear (153) is connected to the first input shaft (12); and the first sliding sleeve (154) is used to control the first gear (151) to selectively engage with the second gear (152) or the third gear (153).

4. The transmission system according to claim 3, characterized in that: The invention also includes a first transmission gear set, wherein the first transmission gear set 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), 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 gear assembly includes a first reduction gear set, a second reduction gear set, and a second shifting mechanism. The first reduction gear set includes a first active reduction gear (251) and a first driven reduction gear (252) that are meshed with each other. The first driven reduction gear (252) is fixedly sleeved on the output shaft (30). The second reduction gear set includes a second active reduction gear (261) and a second driven reduction gear (262) that are meshed with each other. 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 comprises a fourth gear (271) and a second sliding sleeve (272), wherein 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 the second active reduction gear (261).

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

8. The transmission system according to claim 5, characterized in that: The output member 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 to 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, wherein 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 via the PTO reduction assembly.

10. Construction machinery, characterized in that A transmission system comprising any one of claims 1 to 9.

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