Transmission mechanism, power system and engineering vehicle

Abstract

The utility model relates to the technical field of engineering vehicles, and discloses a transmission mechanism, a power system and an engineering vehicle, and the transmission mechanism comprises an input shaft, an output shaft, a first planetary gear train, a first locking device, a second planetary gear train and a second locking device. In the first planetary gear train, a first sun gear is connected to the input shaft, and a first planet carrier is connected with the output shaft. The first locking device is connected with a first gear ring of the first planetary gear train. In the second planetary gear train, a second gear ring is meshed with a second planetary gear, and a second sun gear is in transmission connection with the first gear ring; the second gear ring is in transmission connection with the output shaft. And the second locking device is connected with a second planet carrier of the second planetary gear train. In this way, two-gear transmission can be achieved. When the two gears are switched at will, only the first locking device and the second locking device need to be controlled, meshing between the gears does not need to be disconnected, and therefore power interruption is avoided, the pause feeling in the gear shifting process is reduced, and abrasion between the gears in the gear shifting process is avoided.

Description

Technical Field

[0001] This application relates to the field of engineering vehicle technology, specifically to a transmission mechanism, a power system, and an engineering vehicle. Background Technology

[0002] Engineering vehicles are specialized vehicles used for various engineering construction and operational tasks, such as excavators, bulldozers, road rollers, and loaders. Because engineering vehicles are primarily used for various tasks in diverse environments, they require at least two gears to achieve different speeds and torque levels.

[0003] Existing engineering vehicles often use sliding sleeve shifting for gear changes. The core principle is to change the position of the sliding gear on the shaft to achieve meshing of different gear pairs, thereby altering the transmission ratio and achieving gear shifting. However, sliding sleeve shifting can cause power interruption during gear changes, and wear can easily occur between the gears during this process.

[0004] Therefore, how to solve or improve the problems of power interruption and wear between gears when shifting gears in engineering vehicles has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, this application provides a transmission mechanism, a power system, and an engineering vehicle to solve or improve the problems of power interruption and wear between gears during gear shifting in engineering vehicles.

[0006] In a first aspect, this application provides a transmission mechanism, comprising:

[0007] The input shaft is used to input power.

[0008] Output shaft, used to output power;

[0009] The first planetary gear train includes a first sun gear, a first planet gear, a first ring gear, and a first planet carrier. The first planet gear is rotatably connected to the first planet carrier. The first planet gear meshes with the first sun gear. The first ring gear meshes with the first planet gear. The first sun gear is connected to the input shaft. The first planet carrier is connected to the output shaft.

[0010] A first locking device is connected to the first gear ring and is used to fix or release the first gear ring;

[0011] The second planetary gear train includes a second sun gear, a second planet gear, a second ring gear, and a second planet carrier. The second planet gear is rotatably connected to the second planet carrier. The second planet gear meshes with the second sun gear. The second ring gear meshes with the second planet gear. The second sun gear is driven by the first ring gear. The second ring gear is driven by the output shaft.

[0012] The second locking device is connected to the second planetary carrier and is used to secure or release the second planetary carrier.

[0013] Optionally, it also includes:

[0014] The third planetary gear train includes a third sun gear, a third planet gear, a third ring gear, and a third planet carrier. The third planet gear is rotatably connected to the third planet carrier. The third planet gear meshes with the third sun gear. The third ring gear meshes with the third planet gear. The third sun gear is connected to the input shaft. The third planet carrier is connected to the first ring gear.

[0015] A third locking device is connected to the third gear ring and is used to fix or loosen the third gear ring.

[0016] Optionally, it also includes:

[0017] The third planetary gear train includes a third sun gear, a third planet gear, a third ring gear, and a third planet carrier. The third planet gear is rotatably connected to the third planet carrier. The third planet gear meshes with the third sun gear. The third ring gear meshes with the third planet gear. The third sun gear is connected to the input shaft. The third planet carrier is connected to the first planet carrier.

[0018] A third locking device is connected to the third gear ring and is used to fix or loosen the third gear ring.

[0019] Optionally, the first locking device includes a first clutch, which includes a first outer hub and a first inner hub. The first outer hub is fixedly disposed, and the first inner hub is connected to the first gear ring. The first outer hub and the first inner hub can engage or disengage with each other.

[0020] And / or, the second locking device includes a second clutch, the second clutch includes a second outer hub and a second inner hub, the second outer hub is fixedly disposed, the second inner hub is connected to the second planetary carrier, and the second outer hub and the second inner hub can be engaged or disengaged from each other;

[0021] And / or, the third locking device includes a third clutch, the third clutch includes a third outer hub and a third inner hub, the third outer hub is fixedly disposed, the third inner hub is connected to the third gear ring, and the third outer hub and the third inner hub can be engaged or disengaged from each other.

[0022] Optionally, it also includes:

[0023] The fourth clutch includes a fourth outer hub and a fourth inner hub. The fourth outer hub is drivenly connected to the input shaft, and the fourth inner hub is drivenly connected to the third gear ring. The fourth outer hub and the fourth inner hub can engage or disengage with each other.

[0024] Secondly, this application also provides a power system, comprising:

[0025] Any of the transmission mechanisms described above;

[0026] The engine is connected to the input shaft.

[0027] Optionally, it also includes:

[0028] The fifth clutch includes a fifth outer hub and a fifth inner hub. The fifth outer hub is connected to the engine, and the fifth inner hub is connected to the input shaft. The fifth outer hub and the fifth inner hub can engage or disengage with each other.

[0029] Optionally, it also includes:

[0030] The first gear is connected to the input shaft;

[0031] The second gear meshes with the first gear;

[0032] The first motor is connected to the second gear transmission and can drive the second gear to rotate.

[0033] Optionally, it also includes:

[0034] The third gear meshes with the first gear;

[0035] The second motor is connected to the third gear and can drive the third gear to rotate.

[0036] Thirdly, this application also provides an engineering vehicle, including any of the transmission mechanisms or power systems described above.

[0037] This application provides a transmission mechanism including an input shaft, an output shaft, a first planetary gear train, a first locking device, a second planetary gear train, and a second locking device. A first sun gear is connected to the input shaft, and when the input shaft rotates, it drives the first sun gear to rotate. A first planet carrier is connected to the output shaft, and when the first planet carrier rotates, it drives the output shaft to rotate. The first locking device is connected to a first ring gear and can fix or release the first ring gear. A second sun gear is driven by the first ring gear, so that when the first ring gear rotates, it drives the second sun gear to rotate. The second ring gear is driven by the output shaft, so that when the second ring gear rotates, it drives the output shaft to rotate. The second locking device is connected to a second planet carrier and can fix or release the second planet carrier.

[0038] This allows for two gear positions. In the first gear position, the first locking device releases the first gear ring, while the second locking device secures the second planetary carrier. At this point, the second sun gear, second planet gear, second gear ring, and second planetary carrier form a planetary gear train with the planetary carrier fixed. When the input shaft rotates, the power has two transmission paths. One path is that "the first sun gear drives the first planet gear and even the first planetary carrier to rotate, thereby driving the output shaft to rotate and output power." The other path is that "the first sun gear drives the first planet gear to rotate, the first planet gear drives the first gear ring to rotate, the first gear ring drives the second sun gear to rotate, and with the second planetary carrier fixed, the second planet gear rotates and drives the second gear ring to rotate, thereby driving the output shaft to rotate and output power." The final output power of the output shaft is the coupling of the power outputs from these two paths.

[0039] For the second gear, the first locking device secures the first gear ring, while the second locking device releases the second planetary carrier. At this point, the first sun gear, first planetary gear, first gear ring, and first planetary carrier form a planetary gear train with the gear ring fixed. When the input shaft rotates, there is only one transmission path. This transmission path is: "The first sun gear drives the first planetary gear and even the first planetary carrier to rotate, thereby driving the output shaft to rotate and output."

[0040] In this way, by controlling the first locking device and the second locking device, two gears can be driven. When switching between the first gear and the second gear, it is only necessary to control the first locking device to fix or release the first gear ring and the second locking device to fix or release the second planetary carrier. There is no need to disconnect the meshing between the gears, thereby avoiding power interruption, reducing the jerkiness during gear shifting, and preventing wear between the gears during gear shifting. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a transmission diagram of a power system in first gear according to an embodiment of this application;

[0043] Figure 2 This is a transmission diagram of a power system in second gear according to an embodiment of this application;

[0044] Figure 3 This is a schematic diagram of the transmission of a power system in third gear according to an embodiment of this application;

[0045] Figure 4 This is a schematic diagram of the transmission of a power system in fourth gear according to an embodiment of this application;

[0046] Figure 5 This is a schematic diagram of the structure of a transmission mechanism according to an embodiment of this application;

[0047] Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle;

[0048] Figure 7 for Figure 5 Enlarged view of a portion of point B in the middle;

[0049] Figure 8 for Figure 5 Enlarged view of a portion of point C in the middle;

[0050] Figure 9 This is a transmission diagram of another power system in first gear according to an embodiment of this application;

[0051] Figure 10 This is a transmission diagram of another power system in second gear according to an embodiment of this application;

[0052] Figure 11 This is a transmission diagram of another power system in third gear according to an embodiment of this application;

[0053] Figure 12 This is a transmission diagram of another power system in fourth gear according to an embodiment of this application.

[0054] Explanation of reference numerals in the attached figures:

[0055] 1. Input shaft; 2. Output shaft; 3. First planetary gear train; 31. First sun gear; 32. First planetary gear; 33. First planetary carrier; 34. First ring gear; 4. First clutch; 41. First outer hub; 42. First inner hub; 43. First outer friction plate; 44. First inner friction plate; 45. First piston; 5. Second planetary gear train; 51. Second sun gear; 52. Second planetary gear; 53. Second planetary carrier; 54. Second ring gear; 6. Second clutch; 61. Second outer hub; 62. Second inner hub; 63. Second outer friction plate; 64. Second inner friction plate; 65. Second piston; 7. Third planetary gear train 71. Third Sun Gear; 72. Third Planetary Gear; 73. Third Planetary Carrier; 74. Third Ring Gear; 8. Third Clutch; 81. Third Outer Hub; 82. Third Inner Hub; 83. Third Outer Friction Plate; 84. Third Inner Friction Plate; 85. Third Piston; 9. Fourth Clutch; 91. Fourth Outer Hub; 92. Fourth Inner Hub; 93. Fourth Outer Friction Plate; 94. Fourth Inner Friction Plate; 95. Fourth Piston; 10. Fifth Clutch; 11. Engine; 12. First Gear; 13. Second Gear; 14. First Motor; 15. Third Gear; 16. Second Motor; 17. First Connecting Hub; 18. Second Connecting Hub. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] The following is combined with Figures 1 to 12 This describes an embodiment of the present application.

[0058] According to embodiments of this application, in one aspect, a transmission mechanism is provided, such as... Figure 5 As shown, it includes an input shaft 1, an output shaft 2, a first planetary gear train 3, a first locking device, a second planetary gear train 5, and a second locking device. The input shaft 1 is used to input power, and the output shaft 2 is used to output power.

[0059] The first planetary gear train 3 includes a first sun gear 31, a first planet gear 32, a first ring gear 34, and a first planet carrier 33. The first planet gear 32 is rotatably connected to the first planet carrier 33. The first sun gear 31 meshes with the first planet gear 32, and the first ring gear 34 meshes with the first planet gear 32, thus forming a planetary gear train. The first sun gear 31 is connected to the input shaft 1, and its rotation is driven by the input shaft 1. The first planet carrier 33 is connected to the output shaft 2, and its rotation is driven by the output shaft 2.

[0060] The first locking device is connected to the first gear ring 34 and can fix or loosen the first gear ring 34. The first gear ring 34 can rotate around the axis of the input shaft 1. When the first locking device loosens the first gear ring 34, the first gear ring 34 can rotate around the axis of the input shaft 1. When the first locking device fixes the first gear ring 34, the first gear ring 34 is fixed and cannot rotate.

[0061] The second planetary gear train 5 includes a second sun gear 51, a second planet gear 52, a second ring gear 54, and a second planet carrier 53. The second planet gear 52 is rotatably connected to the second planet carrier 53. The second sun gear 51 meshes with the second planet gear 52, and the second ring gear 54 meshes with the second planet gear 52. Thus, the second sun gear 51, second planet gear 52, second ring gear 54, and second planet carrier 53 form a planetary gear train. The second sun gear 51 is driveably connected to the first ring gear 34, so that when the first ring gear 34 rotates, it drives the second sun gear 51 to rotate. The second ring gear 54 is driveably connected to the output shaft 2, so that when the second ring gear 54 rotates, it drives the output shaft 2 to rotate. The input shaft 1 and the output shaft 2 are coaxial.

[0062] The second locking device is connected to the second planetary carrier 53 and can fix or loosen the second planetary carrier 53. The second planetary carrier 53 can rotate around the axis of the output shaft 2. When the second locking device loosens the second planetary carrier 53, the second planetary carrier 53 can rotate around the axis of the output shaft 2. When the second locking device fixes the second planetary carrier 53, the second planetary carrier 53 is fixed and cannot rotate.

[0063] In this way, by controlling the first locking device and the second locking device, two gear positions can be achieved.

[0064] For the first gear, such as Figure 1 As shown, the first locking device releases the first gear ring 34, while the second locking device secures the second planetary carrier 53. At this time, the second sun gear 51, the second planetary gear 52, the second gear ring 54, and the second planetary carrier 53 form a planetary gear train with the planetary carrier fixed. When the drive input shaft 1 rotates, the power has two transmission paths.

[0065] One of the routes is "the first sun gear 31 drives the first planetary gear 32 and even the first planet carrier 33 to rotate, thereby driving the output shaft 2 to rotate and output".

[0066] Another route is: "The first sun gear 31 drives the first planet gear 32 to rotate, the first planet gear 32 drives the first ring gear 34 to rotate, the first ring gear 34 drives the second sun gear to rotate, and with the second planet carrier 53 fixed, the second planet gear 52 rotates and drives the second ring gear 54 to rotate, thereby driving the output shaft 2 to rotate and output."

[0067] The final output power of output shaft 2 is the coupling of the output power of the two output paths.

[0068] For the second gear, such as Figure 2 As shown, the first locking device secures the first gear ring 34, while the second locking device releases the second planetary carrier 53. At this time, the first sun gear 31, the first planetary gear 32, the first gear ring 34, and the first planetary carrier 33 form a planetary gear train with the gear ring fixed. When the drive input shaft 1 rotates, there is only one transmission path for the power.

[0069] The transmission route is as follows: "The first sun gear 31 drives the first planetary gear 32 and even the first planet carrier 33 to rotate, thereby driving the output shaft 2 to rotate and output."

[0070] When switching between the first and second gears, it is only necessary to control the first locking device to fix or release the first gear ring 34 and the second locking device to fix or release the second planetary carrier 53. There is no need to disconnect the meshing between the gears, thereby avoiding power interruption, reducing the jerking sensation during gear shifting, and preventing wear between gears during gear shifting.

[0071] Furthermore, since both gears have a transmission path of "the first sun gear 31 driving the first planetary gear 32 and even the first planetary carrier 33 to rotate, thereby driving the output shaft 2 to rotate and output", this ensures that when switching between the two gears, the transmission path of "the first sun gear 31 driving the first planetary gear 32 and even the first planetary carrier 33 to rotate, thereby driving the output shaft 2 to rotate and output" always maintains transmission output, avoiding power interruption, and also reducing the jerking sensation when shifting gears.

[0072] Meanwhile, the first planetary gear train and the second planetary gear can share the axial load of the output shaft, thereby reducing the load on the output shaft when it outputs and improving the reliability of the transmission.

[0073] The second sun gear 51 is coaxially connected to the first gear ring 34 through the first connecting hub 17, thereby realizing the transmission between the second sun gear 51 and the first gear ring 34.

[0074] The second gear ring 54 is coaxially connected to the output shaft 2 via the second connecting hub 18, thereby realizing the transmission between the second gear ring 54 and the output shaft 2.

[0075] As an optional embodiment, such as Figure 5 As shown, based on the configuration of input shaft 1, output shaft 2, first planetary gear train 3, first locking device, second planetary gear train 5, and second locking device, the transmission mechanism further includes a third planetary gear train 7 and a third locking device. The third planetary gear train 7 includes a third sun gear 71, a third planetary gear 72, a third ring gear 74, and a third planet carrier 73. The third planetary gear 72 is rotatably connected to the third planet carrier 73. The third planetary gear 72 meshes with the third sun gear 71, and the third ring gear 74 meshes with the third planetary gear 72, thus forming a planetary gear train composed of the third sun gear 71, the third planetary gear 72, the third ring gear 74, and the third planet carrier 73.

[0076] The third sun gear 71 is connected to the input shaft 1, so that the rotation of the input shaft 1 drives the third sun gear 71 to rotate. The third planet carrier 73 is connected to the first ring gear 34, so that the rotation of the third planet carrier 73 drives the first ring gear 34 to rotate.

[0077] The third locking device is connected to the third gear ring 74 and can fix or loosen the third gear ring 74. The third gear ring 74 can rotate around the axis of the output shaft 2. When the third locking device loosens the third gear ring 74, the third gear ring 74 can rotate around the axis of the output shaft 2. When the third locking device fixes the third gear ring 74, the third gear ring 74 is fixed and cannot rotate.

[0078] In this way, by combining the first planetary gear train 3, the first locking device, the second planetary gear train 5, and the second locking device, the third gear can be achieved.

[0079] For the third gear, such as Figure 3 As shown, the first locking device releases the first gear ring 34, the second locking device releases the second planetary carrier 53, and the third locking device fixes the third gear ring 74. At this time, the third sun gear 71, the third planetary gear 72, the third gear ring 74, and the third planetary carrier 73 form a planetary gear train with the gear ring fixed. When the drive input shaft 1 rotates, the power has two transmission paths.

[0080] One of the routes is "the first sun gear 31 drives the first planetary gear 32 and even the first planet carrier 33 to rotate, thereby driving the output shaft 2 to rotate and output".

[0081] Another route is that "the third sun gear 71 drives the third planet gear 72 and even the third planet carrier 73 to rotate, the third planet carrier 73 drives the first ring gear 34 to rotate, the first ring gear 34 drives the first planet gear 32 and even the first planet carrier 33 to rotate, thereby driving the output shaft 2 to rotate and output."

[0082] The final output power of output shaft 2 is the coupling of the output power of the two output paths.

[0083] At this point, for the first gear, such as Figure 1 As shown, the third locking device is released from the third gear ring 74, then the first locking device is released from the first gear ring 34, and the second locking device is used to fix the second planetary carrier 53. At this time, since the third locking device is released from the third gear ring 74, the other components in the third planetary gear train 7, except for the third sun gear 71, will not be driven, so the third planetary gear train 7 does not transmit power.

[0084] At this point, for the second gear, such as Figure 2 As shown, the third locking device is released from the third gear ring 74, the first locking device is then used to fix the first gear ring 34, and the second locking device is released from the second planetary carrier 53. At this time, since the third locking device is released from the third gear ring 74, the other components in the third planetary gear train 7, except for the third sun gear 71, will not be driven, so the third planetary gear train 7 does not transmit power.

[0085] When switching between the first, second, and third gears, it is only necessary to control the first locking device to fix or release the first gear ring 34, the second locking device to fix or release the second planetary carrier 53, and the third locking device to fix or release the third gear ring 74. There is no need to disconnect the meshing between the gears, thereby avoiding power interruption, reducing the jerking sensation during gear shifting, and preventing wear between gears during gear shifting.

[0086] Because all three gears share a transmission path where "the first sun gear 31 drives the first planetary gear 32 and even the first planetary carrier 33 to rotate, thereby driving the output shaft 2 to rotate and output," this transmission path ensures continuous power output when switching between the three gears, preventing power interruption. It also reduces the jerking sensation during gear shifts.

[0087] In a further embodiment, such as Figure 5 As shown, the transmission mechanism also includes a fourth clutch 9, which comprises a fourth outer hub 91 and a fourth inner hub 92. The fourth outer hub 91 is connected to the input shaft 1, and the fourth inner hub 92 is connected to the third gear ring 74. The fourth clutch 9 is a commonly used clutch, and its fourth outer hub 91 and fourth inner hub 92 can engage or disengage.

[0088] In this way, by combining the first planetary gear train 3, the first locking device, the second planetary gear train 5 and the second locking device, the third planetary gear train 7 and the third locking device, a fourth gear can be achieved.

[0089] For the fourth gear, such as Figure 4 As shown, the outer and inner hubs of the fourth clutch 9 are engaged, connecting the input shaft 1 and the third ring gear 74. The first locking device is released from the first ring gear 34, the second locking device is released from the second planetary carrier 53, and the third locking device is released from the third ring gear 74. When the input shaft 1 rotates, it simultaneously drives the third sun gear 71, the first sun gear 31, and the third ring gear 74 to rotate, causing the third planetary gear 72 and the third planetary carrier 73 to rotate synchronously with the third sun gear 71 and the third ring gear 74. Since the third planetary carrier 73 is connected to the first ring gear 34, and the first ring gear 34 rotates synchronously with the third planetary carrier 73, the first ring gear 34 rotates synchronously with the first sun gear 31, causing the first planetary gear 32 and the first planetary carrier 33 to rotate synchronously with the first sun gear 31 and the first ring gear 34, thereby driving the output shaft 2 to rotate and output. This is equivalent to the input shaft 1 directly driving the output shaft 2 to output a higher speed.

[0090] At this point, for the first gear, such as Figure 1 As shown, the outer and inner hubs of the fourth clutch 9 are separated from each other, the third locking device is released from the third gear ring 74, the first locking device is released from the first gear ring 34, and the second locking device is fixed to the second planetary carrier 53.

[0091] At this point, for the second gear, such as Figure 2 As shown, the outer and inner hubs of the fourth clutch 9 are separated from each other, the third locking device is released from the third gear ring 74, the first locking device is fixed to the first gear ring 34, and the second locking device is released from the second planetary carrier 53.

[0092] At this point, for the third gear, such as Figure 3 As shown, the outer and inner hubs of the fourth clutch 9 are separated from each other, the first locking device is loosened, the first gear ring 34 is released, the second locking device is loosened, the second planetary carrier 53 is released, and the third locking device is locked, the third gear ring 74 is locked.

[0093] When switching between the first, second, third, and fourth gears, it is only necessary to control the first locking device to fix or release the first gear ring 34, the second locking device to fix or release the second planetary carrier 53, the third locking device to fix or release the third gear ring 74, and the outer and inner hubs of the fourth clutch 9 to separate or engage with each other. There is no need to disconnect the meshing between the gears, thereby avoiding power interruption, reducing the jerking sensation during gear shifting, and preventing wear between gears during gear shifting.

[0094] As an optional embodiment, such as Figure 9As shown, based on the configuration of input shaft 1, output shaft 2, first planetary gear train 3, first locking device, second planetary gear train 5, and second locking device, the transmission mechanism further includes a third planetary gear train 7 and a third locking device. The third planetary gear train 7 includes a third sun gear 71, a third planetary gear 72, a third ring gear 74, and a third planet carrier 73. The third planetary gear 72 is rotatably connected to the third planet carrier 73. The third planetary gear 72 meshes with the third sun gear 71, and the third ring gear 74 meshes with the third planetary gear 72, thus forming a planetary gear train composed of the third sun gear 71, the third planetary gear 72, the third ring gear 74, and the third planet carrier 73.

[0095] The third sun gear 71 is connected to the input shaft 1, so that the rotation of the input shaft 1 drives the third sun gear 71 to rotate. The third planet carrier 73 is connected to the first planet carrier 33, so that the rotation of the third planet carrier 73 drives the first planet carrier 33 to rotate.

[0096] The third locking device is connected to the third gear ring 74 and can fix or loosen the third gear ring 74. The third gear ring 74 can rotate around the axis of the output shaft 2. When the third locking device loosens the third gear ring 74, the third gear ring 74 can rotate around the axis of the output shaft 2. When the third locking device fixes the third gear ring 74, the third gear ring 74 is fixed and cannot rotate.

[0097] In this way, by combining the first planetary gear train 3, the first locking device, the second planetary gear train 5, and the second locking device, the third gear can be achieved.

[0098] For the third gear, such as Figure 11 As shown, the first locking device is released from the first gear ring 34, the second locking device is released from the second planetary carrier 53, and the third locking device is used to fix the third gear ring 74. At this time, the third sun gear 71, the third planetary gear 72, the third gear ring 74, and the third planetary carrier 73 form a planetary gear train with a fixed gear ring. When the input shaft 1 is driven to rotate, the input shaft 1 drives the third sun gear 71 to rotate, the third sun gear 71 drives the third planetary gear 72 and even the third planetary carrier 73 to rotate, and the third planetary carrier 73 directly drives the first planetary carrier 33 to rotate, thereby driving the output shaft 2 to rotate and output.

[0099] At this point, for the first gear, such as Figure 9 As shown, the third locking device is loosened by the third gear ring 74, the first locking device is loosened by the first gear ring 34, and the second locking device is fixed to the second planetary carrier 53.

[0100] At this point, for the second gear, such as Figure 10 As shown, loosen the third locking device and the third gear ring 74, then fix the first locking device and the first gear ring 34, and loosen the second locking device and the second planetary carrier 53.

[0101] When switching between the first, second, and third gears, it is only necessary to control the first locking device to fix or release the first gear ring 34, the second locking device to fix or release the second planetary carrier 53, and the third locking device to fix or release the third gear ring 74. There is no need to disconnect the meshing between the gears, thereby avoiding power interruption, reducing the jerking sensation during gear shifting, and preventing wear between gears during gear shifting.

[0102] In a further embodiment, such as Figure 9 As shown, the transmission mechanism also includes a fourth clutch 9. The outer hub of the fourth clutch 9 is connected to the input shaft 1, and the inner hub of the fourth clutch 9 is connected to the third gear ring 74. The fourth clutch 9 is a commonly used clutch, and its outer and inner hubs can engage or disengage.

[0103] In this way, by combining the first planetary gear train 3, the first locking device, the second planetary gear train 5 and the second locking device, the third planetary gear train 7 and the third locking device, a fourth gear can be achieved.

[0104] For the fourth gear, such as Figure 12 As shown, the outer and inner hubs of the fourth clutch 9 are engaged, connecting the input shaft 1 and the third ring gear 74. The first locking device is released from the first ring gear 34, the second locking device is released from the second planetary carrier 53, and the third locking device is released from the third ring gear 74. When the input shaft 1 rotates, it simultaneously drives the third sun gear 71, the first sun gear 31, and the third ring gear 74 to rotate, causing the third planetary gear 72 and the third planetary carrier 73 to rotate synchronously with the third sun gear 71 and the third ring gear 74. Since the third planetary carrier 73 is connected to the first ring gear 34, and the first ring gear 34 rotates synchronously with the third planetary carrier 73, the first ring gear 34 rotates synchronously with the first sun gear 31, causing the first planetary gear 32 and the first planetary carrier 33 to rotate synchronously with the first sun gear 31 and the first ring gear 34, thereby driving the output shaft 2 to rotate and output. This is equivalent to the input shaft 1 directly driving the output shaft 2 to output a higher speed.

[0105] At this point, for the first gear, such as Figure 9 As shown, the outer and inner hubs of the fourth clutch 9 are separated from each other, the third locking device is released from the third gear ring 74, the first locking device is released from the first gear ring 34, and the second locking device is fixed to the second planetary carrier 53.

[0106] At this point, for the second gear, such as Figure 10 As shown, the outer and inner hubs of the fourth clutch 9 are separated from each other, the third locking device is released from the third gear ring 74, the first locking device is fixed to the first gear ring 34, and the second locking device is released from the second planetary carrier 53.

[0107] At this point, for the third gear, such as Figure 11 As shown, the outer and inner hubs of the fourth clutch 9 are separated from each other, the first locking device is loosened, the first gear ring 34 is released, the second locking device is loosened, the second planetary carrier 53 is released, and the third locking device is locked, the third gear ring 74 is locked.

[0108] When switching between the first, second, third, and fourth gears, it is only necessary to control the first locking device to fix or release the first gear ring 34, the second locking device to fix or release the second planetary carrier 53, the third locking device to fix or release the third gear ring 74, and the outer and inner hubs of the fourth clutch 9 to separate or engage with each other. There is no need to disconnect the meshing between the gears, thereby avoiding power interruption, reducing the jerking sensation during gear shifting, and preventing wear between gears during gear shifting.

[0109] As an optional embodiment, such as Figure 6 As shown, the first locking device includes a first clutch 4, which is a friction plate clutch, a commonly used type of clutch. It includes a first outer hub 41, a first inner hub 42, a first outer friction plate 43, a first inner friction plate 44, and a first piston 45. The first outer hub 41 is located around the first inner hub 42. A first groove is formed axially on the inner circumferential surface of the first outer hub 41. A first slider is provided on the outer side of the first outer friction plate 43, and the first slider is slidably disposed in the first groove. A second groove is formed axially on the outer circumferential surface of the first inner hub 42. A second slider is provided on the inner side of the first inner friction plate 44, and the second slider is slidably disposed in the second groove.

[0110] When the oil pushes the first piston 45 to slide in the first piston groove, it can push the first outer friction plate 43 or the first inner friction plate 44, so that when the first outer friction plate 43 and the first inner friction plate 44 are pressed against each other, the first outer hub 41 and the first inner hub 42 are circumferentially fixed, and at this time the first outer hub 41 and the first inner hub 42 are engaged with each other. When the first outer friction plate 43 and the first inner friction plate 44 separate, the first outer hub 41 and the first inner hub 42 can rotate relative to each other in the circumferential direction, and at this time the first outer hub 41 and the first inner hub 42 are separated from each other.

[0111] Specifically, the first outer hub 41 is fixedly connected to the frame or housing, and the first inner hub 42 is connected to the first gear ring 34. Thus, the first gear ring 34 is fixed when the first outer friction plate 43 and the first inner friction plate 44 are pressed together, and the first gear ring 34 is released when the first outer friction plate 43 and the first inner friction plate 44 are separated.

[0112] The first locking device can also be a braking device, which uses the friction between the brake pads to fix and loosen the first gear ring 34.

[0113] like Figure 7As shown, the second locking device may include a second clutch 6, which is a friction plate clutch, a commonly used type of clutch. It includes a second outer hub 61, a second inner hub 62, a second outer friction plate 63, a second inner friction plate 64, and a second piston 65. The second outer hub 61 is located around the second inner hub 62. A third sliding groove is formed axially on the inner circumferential surface of the second outer hub 61. A third slider is provided on the outer side of the second outer friction plate 63, and the third slider is slidably disposed in the third sliding groove. A fourth sliding groove is formed axially on the outer circumferential surface of the second inner hub 62. A fourth slider is provided on the inner side of the second inner friction plate 64, and the fourth slider is slidably disposed in the fourth sliding groove.

[0114] When the oil pushes the second piston 65 to slide in the groove of the second piston 65, it can push the second outer friction plate 63 or the second inner friction plate 64, so that when the second outer friction plate 63 and the second inner friction plate 64 are pressed against each other, the second outer hub 61 and the second inner hub 62 are circumferentially fixed, and at this time the second outer hub 61 and the second inner hub 62 are engaged. When the second outer friction plate 63 and the second inner friction plate 64 separate, the second outer hub 61 and the second inner hub 62 can rotate relative to each other in the circumferential direction, and at this time the second outer hub 61 and the second inner hub are separated.

[0115] Specifically, the second outer hub 61 is fixedly connected to the frame or housing, and the second inner hub 62 is connected to the second planetary carrier 53. Thus, the second planetary carrier 53 is fixed when the second outer friction plate 63 and the second inner friction plate 64 are pressed together, and the second planetary carrier 53 is released when the second outer friction plate 63 and the second inner friction plate 64 are separated.

[0116] The second locking device can also be a braking device, which uses the friction between the brake pads to fix and loosen the second planetary carrier 53.

[0117] like Figure 8 As shown, the third locking device may include a third clutch 8, which is a friction plate clutch, a commonly used type of clutch. It includes a third outer hub 81, a third inner hub 82, a third outer friction plate 83, a third inner friction plate 84, and a third piston 85. The third outer hub 81 is located around the third inner hub 82. A fifth sliding groove is formed axially on the inner circumferential surface of the third outer hub 81. A fifth slider is provided on the outer side of the third outer friction plate 83, and the fifth slider is slidably disposed in the fifth sliding groove. A sixth sliding groove is formed axially on the outer circumferential surface of the third inner hub 82. A sixth slider is provided on the inner side of the third inner friction plate 84, and the sixth slider is slidably disposed in the sixth sliding groove.

[0118] When the oil pushes the third piston 85 to slide in the groove of the third piston 85, it can push the third outer friction plate 83 or the third inner friction plate 84, so that when the third outer friction plate 83 and the third inner friction plate 84 are pressed against each other, the third outer hub 81 and the third inner hub 82 are circumferentially fixed, and at this time the third outer hub 81 and the third inner hub 82 are engaged. When the third outer friction plate 83 and the third inner friction plate 84 separate, the third outer hub 81 and the third inner hub 82 can rotate relative to each other in the circumferential direction, and at this time the third outer hub 81 and the third inner hub 82 are separated.

[0119] Specifically, the third outer hub 81 is fixedly connected to the frame or housing, and the third inner hub 82 is connected to the third gear ring 74. Thus, the third gear ring 74 is fixed when the third outer friction plate 83 and the third inner friction plate 84 are pressed together, and the third gear ring 74 is released when the third outer friction plate 83 and the third inner friction plate 84 are separated.

[0120] The third locking device can also be a braking device, which uses the friction between the brake pads to fix and loosen the third gear ring 74.

[0121] In this configuration, any one of the first, second, and third locking devices can be configured as a friction plate clutch, any two can be configured as friction plate clutches, or all of them can be configured as friction plate clutches. This makes gear shifting smoother and reduces jerking.

[0122] As an optional embodiment, the fourth clutch 9 is a friction plate clutch, which is a commonly used type of clutch. Figure 8 As shown, it includes a fourth outer hub 91, a fourth inner hub 92, a fourth outer friction plate 93, a fourth inner friction plate 94, and a fourth piston 95. The fourth outer hub 91 is located around the fourth inner hub 92. A seventh sliding groove is formed along the axial direction on the inner circumferential surface of the fourth outer hub 91. A seventh slider is provided on the outer side of the fourth outer friction plate 93, and the seventh slider is slidably disposed in the seventh sliding groove. An eighth sliding groove is formed along the axial direction on the outer circumferential surface of the fourth inner hub 92. An eighth slider is provided on the inner side of the fourth inner friction plate 94, and the eighth slider is slidably disposed in the eighth sliding groove.

[0123] When the oil pushes the fourth piston 95 to slide in the groove of the fourth piston 95, it can push the fourth outer friction plate 93 or the fourth inner friction plate 94, so that when the fourth outer friction plate 93 and the fourth inner friction plate 94 are pressed against each other, the fourth outer hub 91 and the fourth inner hub 92 are circumferentially fixed, and at this time the fourth outer hub 91 and the fourth inner hub 92 are engaged. When the fourth outer friction plate 93 and the fourth inner friction plate 94 separate, the fourth outer hub 91 and the fourth inner hub 92 can rotate relative to each other in the circumferential direction, and at this time the fourth outer hub 91 and the fourth inner hub 92 are separated.

[0124] Specifically, the fourth outer hub 91 is connected to the input shaft 1, and the fourth inner hub 92 is connected to the third gear ring 74. Thus, when the fourth outer friction plate 93 and the fourth inner friction plate 94 are pressed together, the input shaft 1 is connected to the third gear ring 74, and when the fourth outer friction plate 93 and the fourth inner friction plate 94 are separated, the input shaft 1 is disconnected from the third gear ring 74.

[0125] According to embodiments of this application, another aspect provides a power system, such as... Figure 1 As shown, it includes an engine 11 and any of the above transmission mechanisms. The engine 11 is connected to the input shaft 1, thereby driving the input shaft 1 to rotate.

[0126] As an optional embodiment, such as Figure 1 As shown, the power system also includes a fifth clutch 10, which is a friction plate clutch, a commonly used type of clutch. It includes a fifth outer hub, a fifth inner hub, a fifth outer friction plate, a fifth inner friction plate, and a fifth piston. The fifth outer hub is located around the fifth inner hub. A ninth groove is axially formed on the inner circumferential surface of the fifth outer hub, and a ninth slider is provided on the outer side of the fifth outer friction plate, slidingly disposed within the ninth groove. A tenth groove is axially formed on the outer circumferential surface of the fifth inner hub, and a tenth slider is provided on the inner side of the fifth inner friction plate, slidingly disposed within the tenth groove.

[0127] When the oil pushes the fifth piston to slide in the fifth piston groove, it can push the fifth outer friction plate or the fifth inner friction plate, so that when the fifth outer friction plate and the fifth inner friction plate are pressed together, the fifth outer hub and the fifth inner hub are circumferentially fixed, and at this time the fifth outer hub and the fifth inner hub are engaged. When the fifth outer friction plate and the fifth inner friction plate separate, the fifth outer hub and the fifth inner hub can rotate relative to each other in the circumferential direction, and at this time the fifth outer hub and the first hub separate.

[0128] Specifically, the fifth outer hub of the fifth clutch 10 is connected to the engine 11 for transmission, and the fifth inner hub of the fifth clutch 10 is connected to the input shaft 1 for transmission.

[0129] In this way, after the engine 11 drives the fifth outer hub to rotate, the fifth outer hub and the fifth inner hub are engaged with each other. At this time, the fifth outer hub drives the fifth inner hub to rotate, thereby driving the input shaft 1 to rotate. Then, after the fifth outer hub and the fifth inner hub are separated from each other, the transmission between the fifth outer hub and the fifth inner hub is disconnected, thereby stopping the power output of the engine 11 to the input shaft 1.

[0130] Among them, the first slider, second slider, third slider, fourth slider, fifth slider, sixth slider, seventh slider, eighth slider, ninth slider, and tenth slider are splines. Correspondingly, the first groove, second groove, third groove, fourth groove, fifth groove, sixth groove, seventh groove, eighth groove, ninth groove, and tenth groove are spline grooves.

[0131] As an optional embodiment, such as Figure 1 As shown, the power system also includes a first gear 12, a second gear 13 and a third gear 15. The first gear 12 is connected to the input shaft 1, so that the first gear 12 can drive the input shaft 1 to rotate.

[0132] The second gear 13 meshes with the first gear 12, so that the second gear 13 can drive the first gear 12 to rotate. The first motor 14 is connected to the second gear 13 in a transmission, so that the first motor 14 can drive the second gear 13 to rotate.

[0133] In this way, the first motor 14 drives the second gear 13 to rotate, the second gear 13 drives the first gear 12 to rotate, and in turn drives the input shaft 1 to rotate, realizing the power output of the first motor 14 to the input shaft 1. At the same time, the engine 11 drives the input shaft 1 to rotate and outputs power to the input shaft 1. At this time, the power input to the input shaft 1 by the first motor 14 and the engine 11 is coupled and acts on the input shaft 1 to drive the input shaft 1 to rotate, realizing hybrid output.

[0134] In some embodiments, such as Figure 1 As shown, in a power system comprising a first gear 12, a second gear 13, and a third gear 15, the fifth outer hub of the fifth clutch 10 is connected to the engine 11, and the fifth inner hub of the fifth clutch 10 is connected to the input shaft 1. This configuration separates the fifth outer hub and the fifth inner hub, allowing the first motor 14 to drive the second gear 13 to rotate, which in turn drives the first gear 12, thereby driving the input shaft 1 to rotate, thus enabling the first motor 14 to output power to the input shaft 1. When increased power output is required, the engine 11 can be started, and the fifth outer hub and the fifth inner hub can be engaged, so that the power input to the input shaft 1 by the first motor 14 and the engine 11 is coupled and acts on the input shaft 1.

[0135] In a further embodiment, such as Figure 1 As shown, the power system also includes a third gear 15 and a second motor 16. The third gear 15 meshes with the first gear 12, so that the third gear 15 can drive the first gear 12 to rotate. The second motor 16 is connected to the third gear 15 in a transmission, so that the second motor 16 can drive the third gear 15 to rotate.

[0136] In this way, the second motor 16 drives the third gear 15 to rotate, the third gear 15 drives the first gear 12 to rotate, and in turn drives the input shaft 1 to rotate, realizing the power output of the second motor 16 to the input shaft 1. At the same time, the first motor 14 drives the second gear 13 to rotate, the second gear 13 drives the first gear 12 to rotate, and in turn drives the input shaft 1 to rotate, realizing the power output of the first motor 14 to the input shaft 1. At this time, the power input to the input shaft 1 by the first motor 14 and the second motor 16 is coupled and acts on the input shaft 1 to drive the input shaft 1 to rotate, realizing that the first motor 14 and the second motor 16 provide power simultaneously.

[0137] If the engine 11 drives the input shaft 1 to rotate and outputs power to the input shaft 1 at the same time, the power input to the input shaft 1 by the first motor 14, the second motor 16 and the engine 11 is coupled and acts on the input shaft 1 to drive the input shaft 1 to rotate, thereby realizing hybrid output.

[0138] According to an embodiment of this application, another aspect provides an engineering vehicle including any of the above-described transmission mechanisms or power systems. The technical effects of this engineering vehicle are the same as those of the transmission mechanisms or power systems, and therefore will not be described in detail.

[0139] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A transmission mechanism, characterized in that, include: Input shaft (1), used for inputting power; Output shaft (2), used for outputting power; The first planetary gear train (3) includes a first sun gear (31), a first planetary gear (32), a first ring gear (34), and a first planet carrier (33). The first planetary gear (32) is rotatably connected to the first planet carrier (33). The first planetary gear (32) meshes with the first sun gear (31). The first ring gear (34) meshes with the first planetary gear (32). The first sun gear (31) is connected to the input shaft (1). The first planet carrier (33) is connected to the output shaft (2). The first locking device is connected to the first toothed ring (34) and is used to fix or release the first toothed ring (34); The second planetary gear train (5) includes a second sun gear (51), a second planet gear (52), a second ring gear (54), and a second planet carrier (53). The second planet gear (52) is rotatably connected to the second planet carrier (53). The second planet gear (52) meshes with the second sun gear (51). The second ring gear (54) meshes with the second planet gear (52). The second sun gear (51) is drivenly connected to the first ring gear (34). The second ring gear (54) is drivenly connected to the output shaft (2). The second locking device is connected to the second planetary carrier (53) and is used to fix or release the second planetary carrier (53).

2. The transmission mechanism according to claim 1, characterized in that, Also includes: The third planetary gear train (7) includes a third sun gear (71), a third planet gear (72), a third ring gear (74), and a third planet carrier (73). The third planet gear (72) is rotatably connected to the third planet carrier (73). The third planet gear (72) meshes with the third sun gear (71). The third ring gear (74) meshes with the third planet gear (72). The third sun gear (71) is connected to the input shaft (1). The third planet carrier (73) is connected to the first ring gear (34). The third locking device is connected to the third gear ring (74) and is used to fix or release the third gear ring (74).

3. The transmission mechanism according to claim 1, characterized in that, Also includes: The third planetary gear train (7) includes a third sun gear (71), a third planetary gear (72), a third ring gear (74), and a third planetary carrier (73). The third planetary gear (72) is rotatably connected to the third planetary carrier (73). The third planetary gear (72) meshes with the third sun gear (71). The third ring gear (74) meshes with the third planetary gear (72). The third sun gear (71) is connected to the input shaft (1). The third planetary carrier (73) is connected to the first planetary carrier (33). The third locking device is connected to the third gear ring (74) and is used to fix or release the third gear ring (74).

4. The transmission mechanism according to claim 2 or 3, characterized in that, The first locking device includes a first clutch (4), which includes a first outer hub (41) and a first inner hub (42). The first outer hub (41) is fixedly installed, and the first inner hub (42) is connected to the first gear ring (34). The first outer hub (41) and the first inner hub (42) can be engaged or disengaged from each other. And / or, the second locking device includes a second clutch (6), the second clutch (6) includes a second outer hub (61) and a second inner hub (62), the second outer hub (61) is fixedly disposed, the second inner hub (62) is connected to the second planetary carrier (53), and the second outer hub (61) and the second inner hub (62) can engage or disengage from each other; And / or, the third locking device includes a third clutch (8), the third clutch (8) includes a third outer hub (81) and a third inner hub (82), the third outer hub (81) is fixedly disposed, the third inner hub (82) is connected to the third gear ring (74), and the third outer hub (81) and the third inner hub (82) can be engaged or disengaged from each other.

5. The transmission mechanism according to claim 2 or 3, characterized in that, Also includes: The fourth clutch (9) includes a fourth outer hub (91) and a fourth inner hub (92). The fourth outer hub (91) is driven to the input shaft (1). The fourth inner hub (92) is driven to the third gear ring (74). The fourth outer hub (91) and the fourth inner hub (92) can engage or disengage with each other.

6. A power system, characterized in that, include: The transmission mechanism according to any one of claims 1-5; The engine (11) is connected to the input shaft (1).

7. The power system according to claim 6, characterized in that, Also includes: The fifth clutch (10) includes a fifth outer hub and a fifth inner hub. The fifth outer hub is connected to the engine (11), and the fifth inner hub is connected to the input shaft (1). The fifth outer hub and the fifth inner hub can engage or disengage with each other.

8. The power system according to claim 6, characterized in that, Also includes: The first gear (12) is connected to the input shaft (1); The second gear (13) meshes with the first gear (12); The first motor (14) is connected to the second gear (13) and can drive the second gear (13) to rotate.

9. The power system according to claim 8, characterized in that, Also includes: The third gear (15) meshes with the first gear (12); The second motor (16) is connected to the third gear (15) and can drive the third gear (15) to rotate.

10. An engineering vehicle, characterized in that, It includes the transmission mechanism as described in any one of claims 1-5 or the power system as described in any one of claims 6-9.

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