Cam gear shifting transmission transmission structure

Abstract

The invention relates to the technical field of heavy commercial vehicle transmission systems, in particular to a cam gear shifting transmission transmission structure which comprises a box body assembly, and a transmission assembly, a gear shifting assembly and a gear shifting execution assembly are arranged in the box body assembly. The transmission assembly comprises a gear assembly and a bearing assembly, and the gear assembly is supported on the box body assembly through the bearing assembly; the transmission assembly comprises three power input interfaces and a power output interface and is used for coupling a plurality of power sources and then outputting the power sources; the gear shifting assembly is used for controlling the power transmission paths of the multiple power sources on the transmission assembly, and different working modes are achieved. The gear shifting execution assembly is connected with the gear shifting assembly and serves as an execution element of the gear shifting assembly, and accurate position control over the gear shifting assembly is achieved. The mechanism is compact in structure, reliable in movement and rapid in gear shifting response, optimal combination of pure electric drive, hybrid drive and engine direct drive can be achieved through gear shifting, and the comprehensive efficiency of an internal combustion engine and an electric motor can be brought into full play.

Description

Technical Field

[0001] The present invention relates to the technical field of heavy-duty commercial vehicle transmission systems, and in particular to a cam-shift transmission transmission structure. Background Art

[0002] With the increasing complexity of heavy-duty commercial vehicle usage scenarios and increasingly stringent energy conservation and emission reduction requirements, the trend toward multi-speed transmission systems is becoming increasingly evident. Hybrid powertrains offer significant advantages in energy conservation and emission reduction, as they efficiently combine the internal combustion engine and electric motor, ensuring optimal power output and economy under varying operating conditions. These technologies encompass a variety of approaches, including power splitting, series-parallel connections, and range extension, each with its own advantages and disadvantages. Combining hybrid powertrains with multi-speed transmissions allows for an optimized combination of pure electric drive, hybrid drive, and direct engine drive through gear shifting, fully leveraging the combined efficiency of the internal combustion engine and electric motor.

[0003] However, multi-speed transmissions typically require multiple shift actuators. While current solutions, primarily based on electric shift actuators, offer excellent performance, they significantly increase system costs. In contrast, cam-shift mechanisms, with their compact structure, reliable motion, and rapid shift response, represent a highly promising innovative solution. The use of cam-shift transmissions improves transmission efficiency during shifting, reduces transmission complexity and weight, and is particularly well-suited for the long-term, high-load operation of heavy-duty commercial vehicles. Their precise motion control and excellent durability can effectively enhance the overall performance of hybrid transmissions, driving technological advancements in the industry and strengthening market competitiveness.

[0004] Based on this, researching and developing a cam shift transmission mechanism suitable for hybrid transmissions of heavy-duty commercial vehicles is of great significance for solving existing technical problems and providing new solutions for industry development. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problems of the above-mentioned prior art and provide a cam shift transmission transmission structure to solve the technical problem of high cost when the existing multi-speed transmission mechanism adopts electric shift actuators. The cam shift mechanism replaces part of the electric shift actuators, thereby reducing costs while ensuring performance and realizing an optimized combination of multiple power drive modes.

[0006] The above objectives are achieved through the following technical solutions: A cam shift transmission transmission structure includes a case assembly, in which a transmission assembly, a shift assembly and a shift execution assembly are arranged; the transmission assembly includes a gear assembly and a bearing assembly, and the gear assembly is supported on the case assembly through the bearing assembly; the transmission assembly includes three power input interfaces and one power output interface for coupling multiple power sources and then outputting; the shift assembly is used to control the power transmission paths of multiple power sources on the transmission assembly to achieve different working modes; the shift execution assembly is connected to the shift assembly and serves as an executive element of the shift assembly to achieve precise position control of the shift assembly.

[0007] Furthermore, the gear assembly includes an input assembly, a planetary carrier assembly, a ring gear output shaft, a transition shaft, a second input shaft, an intermediate shaft, an output shaft and an output shaft flange; the planetary carrier assembly includes a sun gear, a planetary gear set, a planetary carrier and a ring gear, and the planetary gear set is meshed with the sun gear and the ring gear respectively; the input assembly includes a first input shaft, a first input gear and a second input gear, wherein the first input shaft is connected to the planetary carrier through a spline, the first input gear is connected to the sun gear through a spline, and the second input gear is fixedly connected to the second input shaft.

[0008] Furthermore, the first input gear is supported on the housing assembly through a second bearing and a third bearing; one side of the first input shaft is supported on the housing assembly through a first bearing, and the other side is supported on the ring gear output shaft through a fifth bearing; the ring gear output shaft is connected to the ring gear through a spline, and is supported on the housing assembly through a sixth bearing, and is supported on the transition shaft through a ninth bearing.

[0009] Furthermore, three gears are provided on the intermediate shaft, including a first intermediate shaft gear, a second intermediate shaft gear and a third intermediate shaft gear, wherein the first intermediate shaft gear is engaged with the second input shaft gear on the second input shaft, the second intermediate shaft gear is engaged with the transition shaft gear on the transition shaft, and the third intermediate shaft gear is engaged with the gear on the output shaft.

[0010] Furthermore, the shift assembly includes a shift assembly A, a shift assembly C, a shift assembly B and a shift assembly D; the shift assembly A is selectively connectable to the first input gear and the planetary carrier; the shift assembly B is selectively connectable to the second input shaft and the transition shaft; the shift assembly C is selectively connectable to the second input shaft and the second input shaft gear; the shift assembly D is selectively connectable to the transition shaft, the transition shaft gear and the output shaft.

[0011] Furthermore, the shift assembly A is designed with a tooth shape and can slide, with three positions: when sliding to the left, the first input gear is fixed to the box assembly; when sliding to the right, the first input gear is meshed and fixed with the gear welded on the planetary carrier; or it remains in the middle position and is not combined with other components; the shift assembly B is designed with a tooth shape and can slide, with two positions: when sliding to the left, the second input shaft and the transition shaft rotate freely respectively; when sliding to the right, the second input shaft and the transition shaft rotate at the same speed to transmit torque; The shift assembly C is designed with a tooth shape and can slide, and has two positions: when sliding to the left, the second input shaft gear sleeve rotates freely on the second input shaft; when sliding to the right, the second input shaft gear rotates at the same speed as the second input shaft to transmit torque; the shift assembly D has three positions: when sliding to the left, the transition shaft and the transition shaft gear are connected together through the shift assembly D; when sliding to the right, the transition shaft and the output shaft are connected together through the shift assembly D; or remain in the middle position and are not combined with other components.

[0012] Furthermore, the second input shaft is sleeve-axially arranged with the ring gear output shaft, and the second input shaft is supported on the housing assembly through a seventh bearing and an eighth bearing; the second input shaft gear sleeve is on the second input shaft and cooperates with the shift assembly C to achieve selective fixation.

[0013] Furthermore, the shift execution assembly includes a first cam shift shaft, a second cam shift shaft, a shift lever, a shift head assembly A, a shift head assembly C, a shift head assembly B and a shift head assembly D; the shift head assembly A, the shift head assembly C, the shift head assembly B and the shift head assembly D are sleeved on the shift lever and can slide on the shift lever.

[0014] Furthermore, the first cam shift shaft is provided with a first cam shift shaft first groove, a first cam shift shaft second groove, a first cam shift shaft third groove and a first cam shift shaft fourth groove; the shift head assembly A includes a first shift head, a first spring, a shift head A, a second spring and a second shift head, the end of the first shift head is installed in the first groove of the first cam shift shaft, one side end of the shift head A is installed in the second groove of the first cam shift shaft, and the end of the second shift head is installed in the third groove of the first cam shift shaft; the shift head assembly B includes a second baffle, a fourth spring and a shift head B, and one side end of the shift head B is installed in the fourth groove of the first cam shift shaft.

[0015] Furthermore, the second cam shift shaft is provided with a first groove of the second cam shift shaft, a second groove of the second cam shift shaft, a third groove of the second cam shift shaft and a fourth groove of the second cam shift shaft; the shift head assembly C includes a first baffle, a third spring and a shift head C, and one side end of the shift head C is installed in the first groove of the second cam shift shaft; the shift head assembly D includes a third shift head, a fifth spring, a shift head D, a sixth spring and a fourth shift head, and the end of the third shift head is installed in the second groove of the second cam shift shaft, one side end of the shift head D is installed in the third groove of the second cam shift shaft, and the end of the fourth shift head is installed in the fourth groove of the second cam shift shaft. Beneficial effects

[0016] The cam-shift transmission structure provided by this invention combines a hybrid powertrain with multi-speed operation. Leveraging the compact structure, reliable movement, and rapid shift response of the cam shift mechanism, it achieves an optimized combination of pure electric drive, hybrid drive, and engine direct drive through shifting, fully leveraging the combined efficiency of the internal combustion engine and electric motor. Furthermore, the use of the cam shift mechanism reduces system cost, improves transmission efficiency, and reduces the complexity and weight of the transmission, adapting to the needs of heavy-duty commercial vehicles and enhancing the overall performance of the hybrid transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a boundary diagram of the transmission structure of a cam-shift transmission according to the present invention, showing the boundary relationship between the housing assembly, the shift execution assembly, the shift assembly, the transmission assembly, etc., including the power input and power output parts; Figure 2 This is a general structural diagram of the transmission structure of a cam-shift transmission according to the present invention, marking the overall components such as the gear assembly, shift assembly, shift execution assembly, housing assembly, and bearing assembly; Figure 3 A schematic diagram of the gear assembly, housing assembly, and shift assembly in the transmission structure of a cam-shift transmission according to the present invention, with detailed annotations of specific components such as the input assembly, planetary carrier assembly, shafts, and shift assemblies; Figure 4 A diagram of a bearing assembly in a cam-shift transmission transmission structure according to the present invention, with the positions of the bearings marked; Figure 5 This is a gear diagram of a cam-shift transmission transmission structure according to the present invention, showing the status of the motor (TM) and the engine (ICE) in different gears; Figure 6 A diagram of a shift execution assembly in a cam-shift transmission transmission structure according to the present invention, showing components such as a first cam shift shaft, a second cam shift shaft, a shift lever, and various shift head assemblies; Figure 7A diagram showing the position of the shift assembly corresponding to the rotation angle of the cam shift shaft in the cam shift transmission transmission structure of the present invention; Figure 8 A table showing the position of the shift assembly corresponding to the rotation angle of the cam shift shaft in the cam shift transmission transmission structure of the present invention; Figure 9 A list of cam shift hub positions and modes for 13 gear positions of a cam shift transmission transmission structure according to the present invention; Figures 10 to 23 for Figure 9 The power flow routes corresponding to the 0 to 13 gear positions.

[0018] Graphic mark: 1 - Gear assembly; 11 - Input assembly, 111 - First input shaft, 112 - Second input shaft, 113 - Third input shaft; 12 - Planet carrier assembly, 121 - Sun gear, 122 - Planetary gear set, 123 - Planet carrier, 124 - Ring gear; 13 - Ring gear output shaft; 14 - Intermediate shaft, 141 - Intermediate shaft gear; 15 - Second input shaft, 151 - Second input shaft gear; 16 - Intermediate shaft, 161 - First intermediate shaft gear, 162 - Second intermediate shaft gear, 163 - Third intermediate shaft gear; 17 - Output shaft; 18 - Output shaft flange; 2-shift assembly, 21-shift assembly A, 22-shift assembly C, 23-shift assembly B, 24-shift assembly D; 3-shift actuator assembly, 31-first cam shift shaft, 311-first cam shift shaft first slot, 312-first cam shift shaft second slot, 313-first cam shift shaft third slot, 314-first cam shift shaft fourth slot; 32-second cam shift shaft, 321-second cam shift shaft first slot, 322-second cam shift shaft second slot, 323-second cam shift shaft third slot, 324-second cam shift shaft fourth slot; 33-shift lever; 34-shift head assembly A, 341 - First dial head, 342 - First spring, 343 - Dial head A, 344 - Second spring, 345 - Second dial head; 35 - Dial head assembly C, 351 - First baffle, 352 - Third spring, 353 - Dial head C; 36 - Dial head assembly B, 361 - Second baffle, 362 - Fourth spring, 363 - Dial head B; 37 - Dial head assembly D, 371 - Third dial head, 372 - Fifth spring, 373 - Sixth spring, 374 - Sixth spring, 375 - Fourth dial head; 4-Box assembly; 5-bearing assembly, 501-first bearing, 502-second bearing, 503-third bearing, 505-fifth bearing, 506-sixth bearing, 507-seventh bearing, 508-eighth bearing, 509-ninth bearing, 510-tenth bearing, 511-eleventh bearing, 512-twelfth bearing, 513-thirteenth bearing, 514-fourteenth bearing. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and examples. The described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention.

[0020] like Figure 1 and 2 As shown, this solution provides a cam shift transmission transmission structure, including a housing assembly 4, wherein a transmission assembly, a shift assembly 2, and a shift execution assembly 3 are provided in the housing assembly 4, wherein Figure 3 and 4 As shown: The transmission assembly includes a gear assembly 1 and a bearing assembly 5. The gear assembly 1 is supported on the housing assembly through the bearing assembly 5. The transmission assembly includes three power input interfaces and one power output interface for coupling multiple power sources and outputting power.

[0021] The shift assembly 2 is used to control the power transmission paths of multiple power sources on the transmission assembly to achieve different working modes.

[0022] The shift execution assembly 3 , as an execution element of the shift assembly 2 , realizes precise position control of the shift assembly 2 .

[0023] The box assembly 4 mainly plays the role of support and locking. In order to better show the internal structure of this solution, only one support and locking part is retained in the schematic diagram, as shown in FIG. Figure 2 shown.

[0024] The bearing assembly 5 is used to support the gear assembly 1 on the housing assembly 4 .

[0025] The gear assembly 1 includes an input assembly 11, a planetary carrier assembly 12, a ring gear output shaft 13, a transition shaft 14, a second input shaft 15, an intermediate shaft 16, an output shaft 17, and an output shaft flange 18; The input assembly 11 includes a first input shaft 111 , a first input gear 112 , and a second input gear 113 .

[0026] The planet carrier assembly 12 includes a sun gear 121 , a planetary gear set 122 , a planet carrier 123 , and a ring gear 124 .

[0027] The intermediate shaft 16 has three gears, namely a first intermediate shaft gear 161 , a second intermediate shaft gear 162 , and a third intermediate shaft gear 163 .

[0028] The shift assembly 2 includes a shift assembly A21, a shift assembly C22, a shift assembly B23, and a shift assembly D24.

[0029] The first input shaft 111 is connected to the planet carrier 123 via splines.

[0030] The first input gear 112 is connected to the sun gear 121 via splines.

[0031] The first input gear 112 is supported on the case assembly 4 via a second bearing 502 and a third bearing 503 .

[0032] The ring gear output shaft 13 is splined to the ring gear 124 .

[0033] One side of the first input shaft 111 is supported on the housing through the first bearing 501, and the other side is supported on the ring gear output shaft 13 through the fifth bearing 505. The ring gear output shaft 13 is supported on the housing through the sixth bearing 506 and supported on the transition shaft 14 through the ninth bearing 509.

[0034] The shift assembly A21 is designed with teeth and can slide, with three positions: When sliding to the left, the first input gear 112 is fixed to the housing assembly 4; When sliding to the right, the first input gear 112 is meshed with the welded gear on the planet carrier 123 and fixed together; it can also remain in the middle position and not be combined with other components.

[0035] The second input shaft 15 is sleeved with the ring gear output shaft 13 , and the second input gear 113 is fixed to the second input shaft 15 . The second input shaft 15 is supported on the housing assembly 4 via a seventh bearing 507 and an eighth bearing 508 .

[0036] The second input shaft gear 151 is sleeved on the second input shaft 15 .

[0037] The shift assembly C22 is designed with teeth and can slide, with two positions: When sliding to the left, the second input shaft gear 151 is sleeved on the second input shaft 15 and rotates freely; When sliding to the right, the second input shaft gear 151 rotates at the same speed as the second input shaft 15 to transmit torque.

[0038] The transition shaft 14 is coaxially arranged with the ring gear output shaft 13 and connected via a spline. One side is supported on the housing via the tenth bearing 510 , and the other side is supported on the output shaft 17 via the eleventh bearing 511 .

[0039] The transition shaft gear 141 is sleeve-arranged with the transition shaft 14 , and the shift assembly D24 is fixed on the transition shaft 14 via a spline.

[0040] The shift assembly B23 is designed with teeth and can slide, with two positions: When sliding to the left, the second input shaft 15 and the transition shaft 14 rotate freely; When sliding to the right, the second input shaft 15 rotates at the same speed as the transition shaft 14 to transmit torque.

[0041] The output shaft 17 is coaxially arranged with the transition shaft 14 and is supported on the housing via a twelfth bearing 512 .

[0042] The shift assembly D24 has three positions: When sliding to the left, the transition shaft 14 and the transition shaft gear 141 are connected together through the shift assembly D24; When sliding to the right, the transition shaft 14 and the output shaft 17 are connected together through the shift assembly D24; they can also remain in the middle position without being combined with other components.

[0043] The output flange 18 is connected to the output shaft 17 via a spline to couple the power of the input assembly 11 to output.

[0044] The intermediate shaft 16 is arranged parallel to the other shafts and is supported on the housing via the thirteenth bearing 513 and the fourteenth bearing 514. The intermediate shaft 16 has three gears, namely the first intermediate shaft gear 161, the second intermediate shaft gear 162, and the third intermediate shaft gear 163.

[0045] The first intermediate shaft gear 161 is meshed with the second input shaft gear 151 , the second intermediate shaft gear 162 is meshed with the transition shaft gear 141 , and the third intermediate shaft gear 163 is meshed with the gear on the output shaft 17 .

[0046] By adjusting the combination of the shift assembly 2 and controlling the gear assembly 1 to combine the transmission routes of the input power source of the input assembly 11, the following can be achieved: Figure 5 The gear positions shown divide the power into the power combination of the internal combustion engine ICE and the electric motor TM. The positions and gear combinations of the corresponding shift components A21, C22, B23 and D24 are shown in the figure. Figure 5 As shown, the shift assembly goes through a cycle and eventually returns to the same position.

[0047] like Figure 6As shown, the shift execution assembly 3 mainly includes a first cam shift shaft 31 , a second cam shift shaft 32 , a shift lever 33 , a shift head assembly A 34 , a shift head assembly C 35 , a shift head assembly B 36 , and a shift head assembly D 37 .

[0048] The first cam shift shaft 31 mainly includes a first cam shift shaft first groove 311 , a first cam shift shaft second groove 312 , a first cam shift shaft third groove 313 and a first cam shift shaft fourth groove 314 .

[0049] The second cam shift shaft 32 mainly includes a second cam shift shaft first groove 321 , a second cam shift shaft second groove 322 , a second cam shift shaft third groove 323 and a second cam shift shaft fourth groove 324 .

[0050] The shift head assembly A34 , the shift head assembly C35 , the shift head assembly B36 and the shift head assembly D37 are sleeved on the shift lever 33 and can slide on the shift lever 33 .

[0051] The shift head assembly A34 includes: a first shift head 341 , a first spring 342 , a shift head A343 , a second spring 344 and a second shift head 345 .

[0052] The shift head assembly C35 includes a first baffle 351 , a third spring 352 and a shift head C353 .

[0053] The shift head assembly B36 includes a second baffle 361, a fourth spring 362 and a shift head B363.

[0054] The shift head assembly D37 includes: a third shift head 371 , a fifth spring 372 , a shift head D373 , a sixth spring 374 and a fourth shift head 375 .

[0055] A first spring 342 is installed between the first shifter 341 and the shifter A343, storing and releasing energy as the distance between them changes. The first shifter 341 is mounted on one end in the first slot 311 of the first cam shift shaft. The shifter A343 is mounted on one side in the second slot 312 of the first cam shift shaft, and the other side is connected to the shift assembly A21. A second spring 344 is installed between the shifter A343 and the second shifter 345, storing and releasing energy as the distance between them changes. The second shifter 345 is mounted on one end in the third slot 313 of the first cam shift shaft.

[0056] A first baffle 351 is fixed to the shift lever 33. A third spring 352 is installed between the first baffle 351 and the shift head C353, storing and releasing energy as the distance between them changes. One end of the shift head C353 is installed in the first slot 321 of the second cam shift shaft, and the other end is connected to the shift assembly C22.

[0057] The second baffle 361 is fixed to the shift lever 33, and the fourth spring 362 is installed between the second baffle 361 and the shift head B363, storing and releasing energy as the distance between the two changes. One end of the shift head B363 is installed in the fourth groove 314 of the first cam shift shaft, and the other end is connected to the shift assembly B23. The fifth spring 372 is installed between the third shifter 371 and the shifter D373, storing and releasing energy as the distance between them changes. The third shifter 371 is mounted on one end in the second slot 322 of the second cam shift shaft. The shifter D373 is mounted on one side in the third slot 323 of the second cam shift shaft, and the other side is connected to the shift assembly D24. The sixth spring 374 is installed between the shifter D373 and the fourth shifter 375, storing and releasing energy as the distance between them changes. The fourth shifter 375 is mounted on one end in the fourth slot 324 of the second cam shift shaft.

[0058] The first cam shift shaft 31 drives the groove lines of the first groove 311, the second groove 312, the third groove 313 and the fourth groove 314 of the first cam shift shaft to change: it drives the shift head A343 and the shift head B363 to move, converts the rotational motion into linear motion, realizes the movement of the shift assembly A21 and the shift assembly B23 to realize shifting; at the same time, it drives the movement of the first shift head 341 and the second shift head 345 to make the first spring 342 and the second spring 344 provide additional power for the shift assembly A21 to shift into and out of gears; and compresses the fourth spring 362 to provide additional power for the shift assembly B23 to shift into and out of gears.

[0059] The second cam shift shaft 32 drives the groove lines of the first groove 321, the second groove 322, the third groove 323 and the fourth groove 324 of the second cam shift shaft to change: it drives the shift head C353 and the shift head D373 to move, converts the rotational motion into linear motion, realizes the movement of the shift assembly C22 and the shift assembly D24 to achieve shifting; at the same time, it drives the movement of the third shift head 371 and the fourth shift head 375 to make the fifth spring 372 and the sixth spring 374 provide auxiliary power for the shift assembly D22 to shift into and out of gear; and compresses the third spring 352 to provide additional power for the shift assembly C22 to shift into and out of gear.

[0060] The angle of rotation of the first cam shift shaft 31 corresponds to the position of the shift assembly A21 and the shift assembly B23. The angle of rotation of the second cam shift shaft 32 corresponds to the position of the shift assembly C22 and the shift assembly D24. Figure 8 As shown, the corresponding angle is Figure 7 shown.

[0061] As a specific embodiment of this solution: The engine is connected to input shaft 111 via a torsional vibration damper or dual-mass flywheel, motor 1 is connected to input gear 112, and motor 2 is connected to input gear 113. The motor drives shift actuator 3 to rotate and drive shift assembly 2, enabling various power coupling modes including pure electric, series hybrid, parallel hybrid, power split hybrid, and engine direct drive, fully leveraging the combined efficiency of the internal combustion engine and electric motor.

[0062] Corresponding gear position Figure 9 As shown: Power flow transmission conditions, such as Figures 10 to 23 As shown, the red arrow is the power transmission route of the power coupling between the first input shaft 111 and the first input gear 112, the green arrow is the power transmission route of the second input gear 113, and the black arrow is the power transmission route after the two are coupled.

[0063] As can be seen, this design achieves multiple pure electric, hybrid, and direct-drive gears through gear reuse and cam shifting. Furthermore, power is uninterrupted during the shifting process. By combining the transmission and shift assemblies, this design can achieve a range of gears far beyond those listed in the table. In practice, different gears and shift sequences can be achieved by adjusting the groove profile on the shift shaft of the cam shift assembly.

[0064] The above description is only for explaining the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cam shift transmission transmission structure, characterized in that: The invention comprises a housing assembly (4), wherein a transmission assembly, a shift assembly (2) and a shift execution assembly (3) are arranged in the housing assembly (4); the transmission assembly comprises a gear assembly (1) and a bearing assembly (5), and the gear assembly (1) is supported on the housing assembly (4) through the bearing assembly (5); the transmission assembly comprises three power input interfaces and one power output interface for coupling multiple power sources and outputting the power; the shift assembly (2) is used to control the power transmission paths of the multiple power sources on the transmission assembly to realize different working modes; the shift execution assembly (3) is connected to the shift assembly (2) and serves as an executive element of the shift assembly (2) to realize precise position control of the shift assembly (2).

2. The cam shift transmission transmission structure according to claim 1, characterized in that: The gear assembly (1) comprises an input assembly (11), a planetary carrier assembly (12), a ring gear output shaft (13), a transition shaft (14), a second input shaft (15), an intermediate shaft (16), an output shaft (17), and an output shaft flange (18); The planetary carrier assembly (12) comprises a sun gear (121), a planetary gear set (122), a planetary carrier (123) and a ring gear (124), wherein the planetary gear set (122) is meshed with the sun gear (121) and the ring gear (124), respectively; The input assembly (11) comprises a first input shaft (111), a first input gear (112) and a second input gear (113), wherein the first input shaft (111) is connected to the planet carrier (123) via a spline, the first input gear (112) is connected to the sun gear (121) via a spline, and the second input gear (113) is fixedly connected to the second input shaft (15).

3. The cam shift transmission transmission structure according to claim 2, characterized in that: The first input gear (112) is supported on the housing assembly (4) through a second bearing (502) and a third bearing (503); one side of the first input shaft (111) is supported on the housing assembly (4) through a first bearing (501), and the other side is supported on the ring gear output shaft (13) through a fifth bearing (505); the ring gear output shaft (13) is connected to the ring gear (124) through a spline, and is supported on the housing assembly (4) through a sixth bearing (506), and is supported on the transition shaft (14) through a ninth bearing (509).

4. The cam shift transmission transmission structure according to claim 2, characterized in that: The intermediate shaft (16) is provided with three gears, including a first intermediate shaft gear (161), a second intermediate shaft gear (162) and a third intermediate shaft gear (163), wherein the first intermediate shaft gear (161) is meshed with the second input shaft gear (151) on the second input shaft (15), the second intermediate shaft gear (162) is meshed with the transition shaft gear (141) on the transition shaft (14), and the third intermediate shaft gear (163) is meshed with the gear on the output shaft (17).

5. The cam shift transmission transmission structure according to claim 4, characterized in that: The shift assembly (2) comprises a shift assembly A (21), a shift assembly C (22), a shift assembly B (23) and a shift assembly D (24); The shift assembly A (21) is selectively connectable to the first input gear (112) and the planet carrier (123); The shift assembly B (23) is selectively connectable to the second input shaft (15) and the transition shaft (14); The shift assembly C (22) is selectively connectable to the second input shaft (15) and the second input shaft gear (151); The shift assembly D (24) is selectively connectable to the transition shaft (14), the transition shaft gear (141), and the output shaft (17).

6. The cam shift transmission transmission structure according to claim 5, characterized in that: The shift assembly A (21) is designed with teeth and is slidable, with three positions: When sliding to the left, the first input gear (112) is fixed to the box assembly (4); When sliding to the right, the first input gear (112) is meshed and fixed with a gear welded on the planetary carrier (123); or remain in the middle position and not combined with other elements; The shift assembly B (23) is designed with teeth and can slide, with two positions: When sliding to the left, the second input shaft (15) and the transition shaft (14) are each free to rotate; When sliding to the right, the second input shaft (15) rotates at the same speed as the transition shaft (14) to transmit torque; The shift assembly C (22) is designed with teeth and can slide, with two positions: When sliding to the left, the second input shaft gear (151) is sleeved on the second input shaft (15) and rotates freely; When sliding to the right, the second input shaft gear (151) rotates at the same speed as the second input shaft (15), transmitting torque; The shift assembly D (24) has three positions: When sliding to the left, the transition shaft (14) and the transition shaft gear (141) are connected together through the shift assembly D (24); When sliding to the right, the transition shaft (14) and the output shaft (17) are connected together through the shift assembly D (24); Or remain in the middle and not combine with other components.

7. The cam shift transmission transmission structure according to claim 5, characterized in that: The second input shaft (15) is sleeve-arranged with the ring gear output shaft (13), and the second input shaft (15) is supported on the housing assembly (4) via a seventh bearing (507) and an eighth bearing (508); the second input shaft gear (151) is sleeved on the second input shaft (15) and cooperates with the shift assembly C (22) to achieve selective fixation.

8. The cam shift transmission transmission structure according to claim 1, characterized in that: The shift execution assembly (3) comprises a first cam shift shaft (31), a second cam shift shaft (32), a shift rod (33), a shift head assembly A (34), a shift head assembly C (35), a shift head assembly B (36) and a shift head assembly D (37); the shift head assembly A (34), the shift head assembly C (35), the shift head assembly B (36) and the shift head assembly D (37) are sleeved on the shift rod (33) and can slide on the shift rod (33).

9. The cam shift transmission transmission structure according to claim 8, characterized in that: The first cam shift shaft (31) is provided with a first cam shift shaft first groove (311), a first cam shift shaft second groove (312), a first cam shift shaft third groove (313) and a first cam shift shaft fourth groove (314); The shift head assembly A (34) includes a first shift head (341), a first spring (342), a shift head A (343), a second spring (344) and a second shift head (345), wherein the end of the first shift head (341) is mounted in the first groove (311) of the first cam shift shaft, the end of one side of the shift head A (343) is mounted in the second groove (312) of the first cam shift shaft, and the end of the second shift head (345) is mounted in the third groove (313) of the first cam shift shaft; The shift head assembly B (36) comprises a second baffle (361), a fourth spring (362) and a shift head B (363), and one end portion of the shift head B (363) is mounted in the fourth groove (314) of the first cam shift shaft.

10. The cam shift transmission transmission structure according to claim 8, characterized in that: The second cam shift shaft (32) is provided with a second cam shift shaft first groove (321), a second cam shift shaft second groove (322), a second cam shift shaft third groove (323) and a second cam shift shaft fourth groove (324); The shift head assembly C (35) comprises a first baffle (351), a third spring (352) and a shift head C (353), and one end portion of the shift head C (353) is installed in the first groove (321) of the second cam shift shaft; The shift head assembly D (37) includes a third shift head (371), a fifth spring (372), a shift head D (373), a sixth spring (374) and a fourth shift head (375), wherein an end portion of the third shift head (371) is mounted in the second groove (322) of the second cam shift shaft, a side end portion of the shift head D (373) is mounted in the third groove (323) of the second cam shift shaft, and an end portion of the fourth shift head (375) is mounted in the fourth groove (324) of the second cam shift shaft.

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