Integrated heavy truck electric drive axle gearbox

Abstract

The invention discloses an integrated heavy truck electric drive axle gearbox which is simple in structure, comprehensive in function and reliable in performance. The gearbox part comprises a gearbox shell, an input shaft, an output shaft and a power takeoff shaft; the electric drive axle part comprises an axle housing and a differential mechanism; the position, corresponding to the differential mechanism, of the gearbox shell is covered with the axle housing, the differential mechanism is arranged in the axle housing, and a part of a main reduction gear of the differential mechanism is arranged in the gearbox shell; the gearbox shell is provided with an input shaft, the power takeoff shaft is arranged on one side, the output shaft is arranged at the position close to the axle housing, the input shaft is fixedly sleeved with a power takeoff driving wheel, a second-gear driving wheel and a first-gear driving wheel, and the power takeoff shaft is sleeved with a power takeoff driven wheel and a first clutch mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of electric drive axle gearboxes, and in particular to an integrated heavy-duty truck electric drive axle gearbox. Background Art

[0002] With the development of the new energy vehicle industry, various electric drive axle systems have emerged. In order to reliably match the corresponding electric drive axles, electric drive axle gearboxes have emerged. However, the existing electric drive axle gearboxes are relatively complex in configuration, and their lubrication systems need to be independently configured. Especially for heavy-duty truck electric drive axle gearboxes, their structure is too complex, resulting in high production costs. Therefore, it is urgent to develop a heavy-duty truck electric drive axle gearbox with simple structure and reliable performance. Summary of the invention

[0003] In view of the above problems, the present invention provides an integrated heavy-duty truck electric drive axle gearbox, which has a simple structure, comprehensive functions and reliable performance.

[0004] An integrated heavy-duty truck electric drive axle gearbox, characterized in that it comprises:

[0005] The gearbox part includes a transmission housing, an input shaft, an output shaft, and a power take-off shaft;

[0006] and the electric drive axle part, which includes the axle housing and differential;

[0007] The position cover of the gearbox housing corresponding to the position where the differential is arranged is provided with the axle housing, the differential is arranged in the axle housing, and a part of the main reduction gear of the differential is built into the gearbox housing;

[0008] The gearbox housing is provided with an input shaft, the power take-off shaft is arranged at one side, the output shaft is arranged near the bridge housing, the input shaft is respectively sleeved with a power take-off driving wheel, a second gear driving wheel, and a first gear driving wheel, a power take-off driven wheel and a first clutch mechanism are sleeved on the power take-off shaft, the power take-off driving wheel is often meshed with the power take-off driven wheel, and the first clutch mechanism is used to put the power take-off shaft into gear for output, or to output without load;

[0009] The output shaft is fixedly sleeved with a main reduction input gear, and the output shaft is sleeved with a second gear driven wheel and a first gear driven wheel that rotate freely, and the output shaft is provided with a second clutch mechanism at positions corresponding to the second gear driven wheel and the first gear driven wheel, the second gear driven wheel is often meshed with the second gear driving wheel, and the first gear driven wheel is often meshed with the first gear driving wheel, and the second clutch mechanism operates in first gear output, second gear output, and neutral gear switching;

[0010] The outer convex part of one end of the output shaft is fixedly sleeved with an oil pump power output wheel, and the oil pump includes an oil pump shaft, an oil pump outer rotor, and an oil pump inner rotor. The oil pump outer rotor is meshed and connected to the oil pump power output wheel, and the oil pump inner rotor is often meshed with the oil pump outer rotor to achieve power output of the oil pump outer rotor and the oil pump inner rotor. The oil pump shaft is fixedly connected to the gearbox housing to support and position the oil pump inner rotor, the oil pump outer rotor and the oil pump shaft, so that when the output shaft is not in neutral, the oil pump can reliably pump lubricating oil into the oil circuit system of the gearbox.

[0011] It is further characterized by:

[0012] The first clutch mechanism comprises a power take-off gear shift sleeve and a power take-off gear hub, wherein the power take-off gear hub is sleeved on the power take-off shaft and is slidably arranged, a power take-off gear shift sleeve is fixedly arranged on the outer periphery of the power take-off gear hub, and the power take-off gear hub is arranged to move toward or away from the driven wheel of the power take-off;

[0013] The second clutch mechanism comprises a shift sleeve and a shift gear hub, wherein the shift gear hub is sleeved on the output shaft and is slidably arranged, the shift sleeve is fixed on the shift gear hub, and the shift gear hub is moved toward or away from the second gear driving wheel and the first gear driving wheel;

[0014] The front end of the input shaft is a spline, and the external power element is connected through the spline for power input;

[0015] The input shaft is connected to the gearbox housing through the input shaft front bearing and the input shaft rear bearing to achieve support and positioning of the input shaft;

[0016] The power take-off driving wheel is connected to the input shaft through interference fit, so that the input shaft and the power take-off driving wheel rotate synchronously;

[0017] The two ends of the power take-off shaft are connected to the gearbox housing through the power take-off front bearing and the power take-off rear bearing, the power take-off gear hub is slidably connected to the power take-off shaft through a spline, and the power take-off driven wheel is connected to the power take-off shaft through a needle bearing;

[0018] The output shaft is connected to the gearbox housing through the output shaft front bearing and the output shaft rear bearing to achieve support and positioning of the output shaft, the first gear driven wheel is connected to the output shaft through the first gear needle roller bearing, the second gear driven wheel is connected to the output shaft through the second gear needle roller, the shift gear hub is slidably connected to the output shaft through the spline, and the shift gear hub is driven to move left and right by the left and right movement of the shift sleeve to achieve the gear switching of 1→0→2;

[0019] The main reduction gear is fixedly connected to the differential, and the main reduction gear is connected to the transmission housing through the main reduction bearing to achieve support and positioning of the main reduction gear and the differential, and the main reduction gear is constantly meshed with the main reduction input gear to achieve power output of the main reduction gear;

[0020] The bridge housing is fixedly connected to the gearbox housing to achieve support and positioning of the gearbox housing.

[0021] After adopting the present invention, it integrates the power take-off function, shortens the axial length, realizes direct power output, and has high transmission efficiency; it integrates the oil pump to realize active lubrication of the entire box, reduces oil stirring loss and the risk of poor lubrication of the entire box; the two-stage transmission realizes high-power output, improves transmission efficiency, has a simple structure, and is low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0023] The names corresponding to the serial numbers in the figure are as follows:

[0024] Transmission housing 1, power take-off shift sleeve 2, power take-off gear hub 3, power take-off driven wheel 4, needle roller bearing 5, power take-off shaft 6, power take-off rear bearing 7, input shaft 8, input shaft rear bearing 9, shift sleeve 10, shift gear hub 11, first gear driven wheel 12, first gear needle roller bearing 13, output shaft rear bearing 14, oil pump outer rotor 15, oil pump inner rotor 16, oil pump shaft 17, bridge housing 18, main reducer bearing 19, differential 20, main reducer gear 21, output shaft front bearing 22, output shaft 23, second gear needle roller 24, second gear driven wheel 25, input shaft front bearing 26, power take-off driving wheel 27, power take-off front bearing 28, second gear driving wheel 29, first gear driving wheel 30, main reducer input gear 31. DETAILED DESCRIPTION

[0025] An integrated heavy-duty truck electric drive axle gearbox, see Figure 1 :It includes a gearbox part and an electric drive axle part;

[0026] The gearbox part includes a transmission housing 1, an input shaft 8, an output shaft 23, and a power take-off shaft 6;

[0027] The electric drive axle part includes an axle housing 18 and a differential 20;

[0028] The gearbox housing 1 is covered with a bridge housing 18 at a position corresponding to the position where the differential 20 is arranged. The differential 20 is arranged in the bridge housing 18, and a part of the main reduction gear 21 of the differential 20 is built into the gearbox housing 1;

[0029] The gearbox housing 1 is provided with an input shaft 8, the power take-off shaft 6 is arranged on one side, and the output shaft 23 is arranged near the bridge housing 18. The input shaft 8 is respectively sleeved with a power take-off driving wheel 27, a second gear driving wheel 29, and a first gear driving wheel 30. The power take-off shaft 6 is sleeved with a power take-off driven wheel 4 and a first clutch mechanism. The power take-off driving wheel 27 is often meshed with the power take-off driven wheel 4. The first clutch mechanism is used to put the power take-off shaft 6 into gear for output, or to output without load.

[0030] The output shaft 23 is fixedly sleeved with a main reduction input gear 31, and the output shaft 23 is sleeved with a freely rotatable second gear driven wheel 25 and a first gear driven wheel 12. The output shaft 23 is provided with a second clutch mechanism at positions corresponding to the second gear driven wheel 25 and the first gear driven wheel 12. The second gear driven wheel 25 is often meshed with the second gear driving wheel 29, and the first gear driven wheel 12 is often meshed with the first gear driving wheel 30. The second clutch mechanism operates in the first gear output, the second gear output, and the neutral gear switching operation.

[0031] An oil pump power output wheel 32 is fixedly sleeved on the outer convex part of one end of the output shaft 23. The oil pump includes an oil pump shaft 17, an oil pump outer rotor 15, and an oil pump inner rotor 16. The oil pump outer rotor 15 is meshed and connected to the oil pump power output wheel 32. The oil pump inner rotor 16 is often meshed with the oil pump outer rotor 15 to achieve power output of the oil pump outer rotor 15 and the oil pump inner rotor 16. The oil pump shaft 17 is fixedly connected to the gearbox housing 1 to support and position the oil pump inner rotor 16, the oil pump outer rotor 15 and the oil pump shaft 17, so that when the output shaft 23 is not in neutral, the oil pump can reliably pump lubricating oil into the oil circuit system of the gearbox.

[0032] In a specific implementation, the first clutch mechanism includes a power take-off gear shift sleeve 2 and a power take-off gear hub 3. The power take-off gear hub 3 is sleeved on the power take-off shaft 6 and is slidably arranged. The power take-off gear hub 3 is fixedly provided with a power take-off gear shift sleeve 2 on the periphery thereof. The power take-off gear hub 3 is arranged to move toward or away from the power take-off driven wheel 4.

[0033] The second clutch mechanism includes a shift sleeve 10 and a shift gear hub 11. The shift gear hub 11 is sleeved on the output shaft 23 and is slidably arranged. The shift sleeve 10 is fixed on the shift gear hub 11. The shift gear hub 11 is moved toward or away from the second gear driving wheel 29 and the first gear driving wheel 30.

[0034] The front end of the input shaft 8 is a spline, which can be connected to an external power element through the spline for power input;

[0035] The input shaft 8 is connected to the gearbox housing 1 through the input shaft front bearing 26 and the input shaft rear bearing 9 to achieve support and positioning of the input shaft 8;

[0036] The power take-off driving wheel 27 is connected to the input shaft 8 through interference fit, so that the input shaft 8 and the power take-off driving wheel 27 rotate synchronously;

[0037] Both ends of the power take-off shaft 6 are connected to the gearbox housing 1 through the power take-off front bearing 28 and the power take-off rear bearing 7. The power take-off gear hub 3 is slidingly connected to the power take-off shaft 6 through a spline. The power take-off driven wheel 4 is connected to the power take-off shaft 6 through a needle bearing 5.

[0038] The output shaft 23 is connected to the gearbox housing 1 through the output shaft front bearing 22 and the output shaft rear bearing 14 to achieve support and positioning of the output shaft 23. The first gear driven wheel 12 is connected to the output shaft 23 through the first gear needle roller bearing 13. The second gear driven wheel 25 is connected to the output shaft 23 through the second gear needle roller 24. The shift gear hub 11 is slidably connected to the output shaft 23 through a spline. The shift gear hub 11 is driven to move left and right by the left and right movement of the shift sleeve 10 to achieve the gear switching of 1→0→2.

[0039] The main reduction gear 21 is fixedly connected to the differential 20 , and the main reduction gear 21 is connected to the transmission case 1 through the main reduction bearing 19 to support and position the main reduction gear 21 and the differential 20 . The main reduction gear 21 is constantly meshed with the main reduction input gear 31 to achieve power output of the main reduction gear 21 .

[0040] The bridge housing 18 is fixedly connected to the gearbox housing 1 to support and position the gearbox housing 1 .

[0041] Its working principle and working process are as follows:

[0042] The gearbox can realize power take-off function, active oil pump lubrication and multi-speed power output;

[0043] 1) When taking off power, the shift sleeve of the power take-off moves to the right, and the power transmission route is as follows:

[0044] Power element → input shaft → power take-off driving wheel → power take-off driven wheel → power take-off output shaft

[0045] 2) When there are multiple outputs and the mechanical pump actively lubricates, the power transmission route is as follows

[0046] First gear: shift sleeve moves right, power element → input shaft → first gear driven wheel → output shaft →

[0047]

[0048] Second gear: shift sleeve moves left, power element → input shaft → second gear driven wheel → output shaft →

[0049]

[0050] Reverse gear is achieved by input reversal;

[0051] During actual use, the working mode can be selected according to the actual working conditions.

[0052] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An integrated heavy-duty truck electric drive axle gearbox, characterized in that: It includes: The gearbox part includes a transmission housing, an input shaft, an output shaft, and a power take-off shaft; and the electric drive axle part, which includes the axle housing and differential; The position cover of the gearbox housing corresponding to the position where the differential is arranged is provided with the axle housing, the differential is arranged in the axle housing, and a part of the main reduction gear of the differential is built into the gearbox housing; The gearbox housing is provided with an input shaft, the power take-off shaft is arranged at one side, the output shaft is arranged near the bridge housing, the input shaft is respectively sleeved with a power take-off driving wheel, a second gear driving wheel, and a first gear driving wheel, a power take-off driven wheel and a first clutch mechanism are sleeved on the power take-off shaft, the power take-off driving wheel is often meshed with the power take-off driven wheel, and the first clutch mechanism is used to put the power take-off shaft into gear for output, or to output without load; The output shaft is fixedly sleeved with a main reduction input gear, and the output shaft is sleeved with a second gear driven wheel and a first gear driven wheel that rotate freely, and the output shaft is provided with a second clutch mechanism at positions corresponding to the second gear driven wheel and the first gear driven wheel, the second gear driven wheel is often meshed with the second gear driving wheel, and the first gear driven wheel is often meshed with the first gear driving wheel, and the second clutch mechanism operates in first gear output, second gear output, and neutral gear switching; The outer convex part of one end of the output shaft is fixedly sleeved with an oil pump power output wheel, and the oil pump includes an oil pump shaft, an oil pump outer rotor, and an oil pump inner rotor. The oil pump outer rotor is meshed and connected to the oil pump power output wheel, and the oil pump inner rotor is often meshed with the oil pump outer rotor to achieve power output of the oil pump outer rotor and the oil pump inner rotor. The oil pump shaft is fixedly connected to the gearbox housing to support and position the oil pump inner rotor, the oil pump outer rotor and the oil pump shaft, so that when the output shaft is not in neutral, the oil pump can reliably pump lubricating oil into the oil circuit system of the gearbox.

2. The integrated heavy-duty truck electric drive axle gearbox according to claim 1, characterized in that: The first clutch mechanism includes a power take-off gear shift sleeve and a power take-off gear hub. The power take-off gear hub is sleeved on the power take-off shaft and slidably arranged. The power take-off gear hub is fixedly provided with a power take-off gear shift sleeve on the outer periphery of the power take-off gear hub. The power take-off gear hub is movably arranged toward or away from the driven wheel of the power take-off.

3. The integrated heavy-duty truck electric drive axle gearbox according to claim 1, characterized in that: The second clutch mechanism includes a shift sleeve and a shift gear hub. The shift gear hub is sleeved on the output shaft and slidably arranged. The shift sleeve is fixed on the shift gear hub. The shift gear hub is moved toward or away from the second gear driving wheel and the first gear driving wheel.

4. The integrated heavy-duty truck electric drive axle gearbox according to claim 1, characterized in that: The front end of the input shaft is a spline, and the external power element is connected through the spline for power input.

5. The integrated heavy-duty truck electric drive axle gearbox according to claim 1, characterized in that: The input shaft is connected to the gearbox housing through an input shaft front bearing and an input shaft rear bearing.

6. The integrated heavy-duty truck electric drive axle gearbox according to claim 1, characterized in that: The power take-off driving wheel is connected to the input shaft through interference fit.

7. The integrated heavy-duty truck electric drive axle gearbox according to claim 1, characterized in that: The two ends of the power take-off shaft are connected to the gearbox housing through the power take-off front bearing and the power take-off rear bearing, the power take-off gear hub is slidably connected to the power take-off shaft through a spline, and the power take-off driven wheel is connected to the power take-off shaft through a needle bearing.

8. The integrated heavy-duty truck electric drive axle gearbox according to claim 1, characterized in that: The output shaft is connected to the gearbox housing through an output shaft front bearing and an output shaft rear bearing, the first-gear driven wheel is connected to the output shaft through a first-gear needle roller bearing, the second-gear driven wheel is connected to the output shaft through a second-gear needle roller, the shift gear hub is slidably connected to the output shaft through a spline, and the shift gear hub is driven to move left and right by the left and right movement of the shift sleeve to achieve gear switching of 1→0→2.

9. The integrated heavy-duty truck electric drive axle gearbox according to claim 1, characterized in that: The main reduction gear is fixedly connected to the differential, and the main reduction gear is connected to the transmission housing through a main reduction bearing to support and position the main reduction gear and the differential, and the main reduction gear is constantly meshed with the main reduction input gear.

10. The integrated heavy-duty truck electric drive axle gearbox according to claim 1, characterized in that: The bridge housing is fixedly connected to the gearbox housing.

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