Engine transfer case of silage maize harvester and silage maize harvester

Abstract

The utility model relates to a silage maize harvester engine transfer case and a silage maize harvester, and relates to the field of silage maize harvesters, a supporting shaft of the silage maize harvester engine transfer case is rotatably installed in a case body, a belt pulley is rotatably arranged on the supporting shaft in a sleeved mode and is in clutch transmission with the supporting shaft through a clutch assembly, and a driving gear is fixedly arranged on the supporting shaft in a sleeved mode. The caliper brake is fixedly arranged and used for applying braking force to the belt pulley. The beneficial effects are that power is output to the walking pump through the driving gear, the walking motor is driven through the walking pump, and the control comfort is greatly improved; the driving gear is adopted to transmit walking power, transmission reliability is high, and transmitted power is large. The power is further transmitted to the belt pulley through the clutch assembly, the clutch assembly controls transmission or disconnection of the power, the caliper brake can make the belt pulley brake emergently, and the situation that when the working module is overloaded, parts are damaged or impurities are mixed into forage, and crop losses are caused is avoided. The power distribution function is achieved, and respective transmission of the working module of the silage maize harvester and the walking pump is achieved.

Description

Technical Field

[0001] This utility model relates to the field of silage harvesters, specifically to a silage harvester engine transfer case and a silage harvester. Background Technology

[0002] Currently, forage harvesters use belt pulleys for transmission between the engine, working module, and travel pump. A tensioner pulley compresses the belt, changing its tension to engage or disengage the clutch. Furthermore, there is no buffer structure between the engine and working module. During operation, this structure suffers from high impact, belt slippage, and short lifespan, making it unsuitable for high-horsepower engines. As forage harvester models become larger and harvesting efficiency increases, the demand for engine horsepower is constantly rising, and users are also increasing their requirements for machine reliability. This transmission system is no longer suitable for the development of forage harvesters, and a new structure with higher reliability and greater power transmission to the travel pump is urgently needed to replace it. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to provide an engine transfer case with high reliability and greater power transmission to the travel pump.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A transfer case for a silage harvester engine includes a housing, a support shaft, a clutch assembly, a pulley, a caliper brake, and a drive gear. The support shaft is rotatably mounted in the housing. The pulley is rotatably sleeved on the support shaft and is engaged and disengaged from the support shaft through the clutch assembly. The drive gear is fixedly sleeved on the support shaft. The caliper brake is fixedly installed and used to apply braking force to the pulley.

[0005] The beneficial effects of this utility model are as follows: The engine is connected to the support shaft via a transmission, inputting power. Power is output to the travel pump through a drive gear, which drives the travel motor, significantly improving handling comfort. Furthermore, the use of a drive gear to transmit travel power ensures high transmission reliability and transmits a large amount of power. Simultaneously, power is also transmitted to the pulley via a clutch assembly, which in turn transmits power to the working module. The clutch assembly controls the transmission or disconnection of power, and the caliper brake allows for emergency braking of the pulley, preventing damage to components or crop loss due to impurities in the forage when the working module is overloaded. This engine transfer case also functions as a power distribution unit, allowing for separate transmission between the forage harvester's working module and the travel pump.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the clutch assembly includes a friction plate, a clutch housing, a clutch return spring, a return spring support shaft, and a pressure plate. The friction plate is fixedly sleeved on one end of the support shaft. The clutch housing is fixedly connected to one end of the pulley and covers the outside of the friction plate. The pressure plate is slidably disposed inside the clutch housing and is sealed to the clutch housing to form a clutch hydraulic chamber. The clutch housing has an oil inlet communicating with the clutch hydraulic chamber. One end of the return spring support shaft has a limiting boss, and its other end passes through the clutch return spring and the clutch housing and is threadedly connected to the pressure plate.

[0008] The beneficial effects of adopting the above-mentioned further solution are as follows: Hydraulic oil enters the clutch housing through the inlet, pushing the pressure plate towards the pulley. The pressure plate, friction plates, and pulley are pressed together in sequence, and power is transmitted from the support shaft to the pulley through friction. After the hydraulic oil is disconnected, the pressure plate returns to its original position under the action of the clutch return spring, releasing the friction plates and disconnecting the transmission between the support shaft and the pulley. The clutch assembly uses a friction clutch, and the engagement process can reduce impact through slippage, while overload protection can also be achieved through slippage.

[0009] Furthermore, the clutch assembly also includes anti-loosening washers. Multiple return spring support shafts are spaced apart along the circumference of the clutch housing. The number of clutch return springs is the same as the number of return spring support shafts. The anti-loosening washers are simultaneously sleeved on multiple return spring support shafts and located between the limiting boss and the clutch return spring.

[0010] The beneficial effect of adopting the above-mentioned further solution is that by setting anti-loosening shims and having multiple limiting bosses together limit the anti-loosening shims, the corresponding clutch return spring can be prevented from failing when the connection between a certain return spring support shaft and the pressure plate becomes loose.

[0011] Furthermore, the transfer case of the silage harvester engine also includes a brake disc, which is fixedly connected to the pulley. The caliper brake abuts against the brake disc and applies braking force, or is separated from the brake disc.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the caliper brake applies braking force to the brake disc, thereby realizing emergency braking of the pulley.

[0013] Furthermore, the forage harvester engine transfer case also includes a hollow shaft, which is coaxially rotatably mounted on the support shaft, and the pulley is coaxially mounted on the outside of the hollow shaft and fixedly connected to the hollow shaft.

[0014] Furthermore, the transfer case of the silage harvester engine also includes a torsional damper, which comprises a small torsional damper disc, a large hollow torsional damper disc, and a damping spring. The small torsional damper disc and the large hollow torsional damper disc are coaxially arranged, and the damping spring is arranged circumferentially along the small torsional damper disc. The end of the damping spring simultaneously abuts against both the small torsional damper disc and the large hollow torsional damper disc. The small torsional damper disc is fixedly connected to the support shaft.

[0015] The beneficial effects of adopting the above-mentioned further solution are: the large hollow disc of the torsional shock absorber is used to be fixedly connected to the engine. During the transmission process between the working device and the engine, if there is an impact load, a flexible connection can be achieved through the shock-absorbing spring in the circumferential direction, which can reduce the impact, avoid damage to the parts caused by the impact, and improve reliability.

[0016] Furthermore, the forage harvester engine transfer case also includes a gear set, which is rotatably mounted inside the case and is connected to the drive gear.

[0017] The advantages of adopting the above-mentioned further solution are: the drive gear is driven by the traveling pump through the gear set, which can transmit large torque and has high reliability.

[0018] Furthermore, the gear set includes a first idler gear, a second idler gear, and a driven gear that mesh in sequence. The first idler gear, the second idler gear, and the driven gear are all rotatably connected to the housing. The first idler gear meshes with the driving gear for transmission.

[0019] This utility model also provides a silage harvester, including an engine, a traveling pump, and a silage harvester engine transfer case, with a support shaft drivingly connected to the engine and a drive gear drivingly connected to the traveling pump.

[0020] The beneficial effects are: the engine transmits power to the walking pump and the working module through the silage harvester engine transfer case, realizing power distribution, and the transmission reliability is high, the power transmission is large, and it can also avoid damage caused by overload of the working module.

[0021] Furthermore, the forage harvester also includes a hydraulic oil inlet circuit, which is connected to the hydraulic chamber of the clutch assembly and the caliper brake via a pipeline, and is in communication with the hydraulic chamber of the clutch assembly or the caliper brake.

[0022] The beneficial effect of adopting the above-mentioned further scheme is that the hydraulic chambers of the clutch assembly and the caliper brake are connected in parallel, with only one of them connected to the hydraulic inlet circuit. In this way, when the clutch assembly engages and drives, the caliper brake is released; when the clutch assembly disengages, the caliper brake clamps and applies braking force to the pulley, thereby achieving effective and reliable control over the starting and stopping of the pulley. Attached Figure Description

[0023] Figure 1 This is a structural diagram of the transmission belt pulley between the engine, working module, and traveling pump of a silage harvester in the prior art;

[0024] Figure 2 This is an assembly diagram of the transfer case of the silage harvester engine of this utility model;

[0025] Figure 3 This is a cross-sectional view of the transfer case of the silage harvester engine of this utility model;

[0026] Figure 4 This is a partial structural diagram of the transfer case of the silage harvester engine of this utility model;

[0027] Figure 5 This is a structural diagram of the torsional shock absorber of this utility model.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 100. Engine; 110. Working module pulley; 120. Travel pulley; 200. Travel pump;

[0030] 1. Torsional shock absorber; 101. Small disc of torsional shock absorber; 102. Large hollow disc of torsional shock absorber; 103. Shock absorber spring; 2. Support shaft; 3. Drive gear; 4. First idler gear; 5. Second idler gear; 6. Driven gear; 7. Hollow shaft; 8. Friction plate; 9. Clutch housing; 10. Clutch return spring; 11. Return spring support shaft; 12. Pressure plate; 13. Piston; 14. Oil inlet; 15. Sealing ring; 16. Anti-loosening gasket; 17. Pulley; 18. Brake disc; 19. Brake friction plate; 20. Clamp brake; 21. Hydraulic oil inlet circuit. Detailed Implementation

[0031] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0032] like Figure 1 As shown, in the prior art, the output shaft of the engine 100 is connected to a transmission pulley. The transmission pulley includes a working module pulley 110 and a traveling pulley 120, which are coaxially fixedly connected. The working module pulley 110 outputs power to the working module via a belt, and the traveling pulley 120 outputs power to the traveling pump via a belt. This transmission structure has problems such as large impact, easy belt slippage, and short service life.

[0033] Example 1

[0034] like Figures 2-5As shown, this embodiment provides a transfer case for a silage harvester engine, including a housing, a support shaft 2, a clutch assembly, a pulley 17, a caliper brake 20, and a drive gear 3. The support shaft 2 is rotatably mounted in the housing, the pulley 17 is rotatably sleeved on the support shaft 2, and is engaged and disengaged from the support shaft 2 through the clutch assembly, the drive gear 3 is fixedly sleeved on the support shaft 2, and the caliper brake 20 is fixedly installed and used to apply braking force to the pulley 17.

[0035] The engine 100 is connected to the support shaft 2 for power input. Power is output to the travel pump 200 via the drive gear 3, which drives the travel motor, significantly improving handling comfort. The drive gear 3 ensures high transmission reliability and transmits a large amount of power. Simultaneously, power is also transmitted to the pulley 17 via the clutch assembly. The pulley 17 transmits power to the working module. The clutch assembly controls the transmission or disconnection of power, and the caliper brake 20 can brake the pulley 17 in an emergency, preventing damage to components or crop loss due to impurities in the forage when the working module is overloaded. This engine transfer case functions as a power distribution unit, allowing for separate transmission between the forage harvester's working module and the travel pump 200.

[0036] Specifically, the transmission of pulley 17 through the clutch assembly to the support shaft 2 means that when the clutch assembly is engaged, pulley 17 rotates synchronously with the support shaft 2; when the clutch assembly is disengaged, pulley 17 is disconnected from the support shaft 2 and pulley 17 does not rotate with the support shaft 2.

[0037] Based on the above technical solution, the clutch assembly includes a friction plate 8, a clutch housing 9, a clutch return spring 10, a return spring support shaft 11, and a pressure plate 12. The friction plate 8 is fixedly sleeved on one end of the support shaft 2. The clutch housing 9 is fixedly connected to one end of the pulley 17 and covers the outside of the friction plate 8. The pressure plate 12 is slidably disposed inside the clutch housing 9 and is sealed with the clutch housing 9 to form a clutch hydraulic chamber. The clutch housing 9 has an oil inlet 14 that communicates with the clutch hydraulic chamber. One end of the return spring support shaft 11 has a limiting boss, and its other end passes through the clutch return spring 10 and the clutch housing 9 and is threadedly connected to the pressure plate 12.

[0038] In this design, hydraulic oil enters the clutch housing 9 through the inlet 14, pushing the pressure plate 12 towards the pulley 17. The pressure plate 12, friction plate 8, and pulley 17 are sequentially pressed together, and power is transmitted from the support shaft 2 to the pulley 17 through friction. After the hydraulic oil is disconnected, the pressure plate 12 returns to its original position under the action of the clutch return spring 10, releasing the friction plate 8 and disconnecting the transmission between the support shaft 2 and the pulley 17. The clutch assembly uses a friction clutch, which can reduce impact during engagement by slipping, and can also achieve overload protection through slipping.

[0039] Specifically, the friction plate 8 has a ring structure, which can undergo elastic deformation under the pressure of the pressure plate 12, thereby abutting against the pulley 17.

[0040] Specifically, the clutch assembly also includes a piston 13 and a sealing ring 15. The clutch housing 9 has a protrusion in the middle that protrudes away from the support shaft 2. The piston 13 is slidably mounted within the protrusion. A sealing ring 15 is embedded in the inner wall of the protrusion to seal the piston 13 against the inner wall of the protrusion. The clutch hydraulic chamber is formed between the piston 13 and the inner cavity of the protrusion. The end wall of the protrusion has an oil inlet 14. The piston 13 is fixedly connected to or abuts against the pressure plate 12. The return spring support shaft 11 is located outside the protrusion.

[0041] Specifically, the return spring support shaft 11 is a bolt, and the limiting boss is a bolt head.

[0042] Based on the above technical solution, the clutch assembly further includes an anti-loosening washer 16. Multiple return spring support shafts 11 are provided circumferentially along the clutch housing 9. The number of clutch return springs 10 is the same as that of the return spring support shafts 11. The anti-loosening washer 16 is simultaneously sleeved on multiple return spring support shafts 11 and is located between the limiting boss and the clutch return spring 10.

[0043] An anti-loosening shim 16 is provided, and multiple limiting bosses together limit the anti-loosening shim 16, which can prevent the corresponding clutch return spring 10 from failing when the connection between a certain return spring support shaft 11 and pressure plate 12 becomes loose.

[0044] Based on the above technical solution, the transfer case of the silage harvester engine also includes a brake disc 18, which is fixedly connected to the pulley 17. The caliper brake 20 abuts against the brake disc 18 and applies braking force, or separates from the brake disc 18.

[0045] The caliper brake 20 applies braking force to the brake disc 18, thereby achieving emergency braking of the pulley 17.

[0046] Specifically, the caliper brake 20 uses hydraulic power to drive the brake piston close to the brake disc 18 to achieve braking. A brake friction pad 19 is also fixed on the side of the brake piston facing the brake disc 18. The friction force is increased by the brake friction pad 19, and the brake friction pad 19 can be replaced after wear, which is convenient for maintenance.

[0047] Based on the above technical solution, the silage harvester engine transfer case also includes a hollow shaft 7, which is coaxially rotatably sleeved on the support shaft 2, and the pulley 17 is coaxially sleeved on the outside of the hollow shaft 7 and fixedly connected to the hollow shaft 7.

[0048] Specifically, such as Figure 4 As shown, the hollow shaft 7 is sleeved on the outside of the support shaft 2 through a bearing, and its outer wall is rotatably connected to the cylindrical structure extending outward from the housing through the bearing. One end of the hollow shaft 7 is fixedly connected to the end of the pulley 17 by bolts, and the pulley 17 is sleeved on the outside of the cylindrical structure.

[0049] Alternatively, the hollow shaft 7 is not provided, and the pulley 17 is rotatably mounted on the support shaft 2 via a bearing.

[0050] Based on the above technical solution, the transfer case of the silage harvester engine also includes a torsional damper 1. The torsional damper 1 includes a small torsional damper disc 101, a large hollow torsional damper disc 102, and a damping spring 103. The small torsional damper disc 101 and the large hollow torsional damper disc 102 are coaxially arranged. The damping spring 103 is arranged circumferentially along the small torsional damper disc 101, and the end of the damping spring 103 abuts against both the small torsional damper disc 101 and the large hollow torsional damper disc 102. The small torsional damper disc 101 is fixedly connected to the support shaft 2.

[0051] The large hollow disc 102 of the torsional damper is used to be fixedly connected to the flywheel of the engine 100. During the transmission between the working device and the engine, if there is an impact load, a flexible connection can be achieved through the circumferential damping spring 103 to reduce the impact, avoid damage to the parts caused by the impact, and improve reliability.

[0052] Specifically, the small torsional damper disc 101 has a first mounting groove on its outer edge, and the large hollow torsional damper disc 102 is annular with a second mounting groove on its inner edge. The damping spring 103 is simultaneously installed in both the first and second mounting grooves. When an impact load occurs, and the small torsional damper disc 101 and the large hollow torsional damper disc 102 rotate relative to each other, the damping spring 103 is compressed to buffer the impact load.

[0053] Specifically, multiple damping springs 103 are evenly arranged around the circumference of the torsional damper 1.

[0054] Specifically, the torsional damper small disc 101 is splinedly connected to the support shaft 2.

[0055] Based on the above technical solution, the silage harvester engine transfer case also includes a gear set, which is rotatably mounted in the case and is connected to the drive gear 3 for transmission.

[0056] The drive gear 3 is driven by the travel pump 200 through the gear set, which can transmit large torque and has high reliability.

[0057] Based on the above technical solution, the gear set includes a first idler gear 4, a second idler gear 5 and a driven gear 6 that mesh in sequence. The first idler gear 4, the second idler gear 5 and the driven gear 6 are all rotatably connected to the housing. The first idler gear 4 meshes with the driving gear 3 for transmission.

[0058] Optionally, the number of idler gears can be increased or decreased according to the required transmission ratio, the direction of rotation of the driven gear 6, and other usage requirements.

[0059] Example 2

[0060] Based on Embodiment 1, this embodiment also provides a forage machine, including an engine 100, a traveling pump 200 and a forage machine engine transfer case, a support shaft 2 is connected to the engine 100 in a transmission connection, and a drive gear 3 is connected to the traveling pump 200 in a transmission connection.

[0061] The engine 100 transmits power to the walking pump 200 and the working module through the silage harvester engine transfer case, achieving power distribution. The transmission is highly reliable, transmits a large amount of power, and can also avoid damage caused by overload of the working module.

[0062] Based on the above scheme, the forage machine also includes a hydraulic oil inlet circuit 21, which is connected to the hydraulic chamber of the clutch assembly and the caliper brake 20 through pipelines and communicates with the hydraulic chamber of the clutch assembly or the caliper brake 20.

[0063] The hydraulic chambers of the clutch assembly and the caliper brake 20 are connected in parallel, with only one of them connected to the hydraulic inlet passage 21. Thus, when the clutch assembly engages and drives, the caliper brake 20 is released; when the clutch assembly disengages, the caliper brake 20 clamps and applies braking force to the pulley 17, thereby achieving effective and reliable control over the starting and stopping of the pulley 17.

[0064] Specifically, the hydraulic inlet line 21, the return line, the inlet 14 of the clutch assembly, and the hydraulic chamber of the caliper brake 20 are all connected to a two-position four-way valve. The two-position four-way valve can be switched to: the hydraulic inlet line 21 is connected to the inlet 14, and the return line is connected to the hydraulic chamber of the caliper brake 20. At this time, the clutch assembly receives oil, the pulley 17 rotates, and the caliper brake 20 is released; or the hydraulic inlet line 21 is connected to the hydraulic chamber of the caliper brake 20, and the return line is connected to the inlet 14. The caliper brake 20 applies braking force to the pulley 17, the hydraulic oil in the clutch assembly is discharged, and the transmission is disconnected.

[0065] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A transfer case for a silage harvester engine, characterized in that, The device includes a housing, a support shaft (2), a clutch assembly, a pulley (17), a caliper brake (20), and a drive gear (3). The support shaft (2) is rotatably mounted in the housing. The pulley (17) is rotatably sleeved on the support shaft (2) and engages and disengages with the support shaft (2) through the clutch assembly. The drive gear (3) is fixedly sleeved on the support shaft (2). The caliper brake (20) is fixedly installed and used to apply braking force to the pulley (17).

2. The transfer case for a silage harvester engine according to claim 1, characterized in that, The clutch assembly includes a friction plate (8), a clutch housing (9), a clutch return spring (10), a return spring support shaft (11), and a pressure plate (12). The friction plate (8) is fixedly sleeved on one end of the support shaft (2). The clutch housing (9) is fixedly connected to one end of the pulley (17) and covers the outside of the friction plate (8). The pressure plate (12) is slidably disposed inside the clutch housing (9) and is sealed with the clutch housing (9) to form a clutch hydraulic chamber. The clutch housing (9) has an oil inlet (14) communicating with the clutch hydraulic chamber. One end of the return spring support shaft (11) has a limiting boss, and its other end passes through the clutch return spring (10), the clutch housing (9), and is threadedly connected to the pressure plate (12).

3. The transfer case for a silage harvester engine according to claim 2, characterized in that, The clutch assembly also includes an anti-loosening washer (16). Multiple return spring support shafts (11) are spaced apart circumferentially along the clutch housing (9). The number of clutch return springs (10) is the same as that of the return spring support shafts (11). The anti-loosening washer (16) is simultaneously sleeved on multiple return spring support shafts (11) and located between the limiting boss and the clutch return springs (10).

4. The transfer case of a silage harvester engine according to claim 1, characterized in that, It also includes a brake disc (18), which is fixedly connected to the pulley (17), and the caliper brake (20) abuts against the brake disc (18) and applies braking force, or is separated from the brake disc (18).

5. A forage harvester engine transfer case according to claim 1, characterized in that, It also includes a hollow shaft (7), which is coaxially rotatably sleeved on the support shaft (2), and the pulley (17) is coaxially sleeved on the outside of the hollow shaft (7) and fixedly connected to the hollow shaft (7).

6. A forage harvester engine transfer case according to claim 1, characterized in that, It also includes a torsional damper (1), which includes a small torsional damper disc (101), a large torsional damper hollow disc (102), and a damping spring (103). The small torsional damper disc (101) and the large torsional damper hollow disc (102) are coaxially arranged. The damping spring (103) is arranged circumferentially along the small torsional damper disc (101), and the end of the damping spring (103) simultaneously abuts against the small torsional damper disc (101) and the large torsional damper hollow disc (102). The small torsional damper disc (101) is fixedly connected to the support shaft (2).

7. A forage harvester engine transfer case according to any one of claims 1-6, characterized in that, It also includes a gear set, which is rotatably mounted in the housing and is connected to the drive gear (3) for transmission.

8. A forage harvester engine transfer case according to claim 7, characterized in that, The gear set includes a first idler gear (4), a second idler gear (5), and a driven gear (6) that mesh in sequence. The first idler gear (4), the second idler gear (5), and the driven gear (6) are all rotatably connected to the housing. The first idler gear (4) meshes with the driving gear (3) for transmission.

9. A silage harvester, characterized in that, It includes an engine (100), a travel pump (200), and a forage harvester engine transfer case as described in any one of claims 1-8, wherein a support shaft (2) is driven to the engine (100), and a drive gear (3) is driven to the travel pump (200).

10. A silage harvester according to claim 9, characterized in that, It also includes a hydraulic inlet line (21), which is connected to the hydraulic chamber of the clutch assembly and the caliper brake (20) through a pipeline and communicates with the hydraulic chamber of the clutch assembly or the caliper brake (20).

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