Engine assembly and agricultural machine

Abstract

The utility model discloses an engine assembly and agricultural machinery, the engine assembly comprises a crankcase and a camshaft rotatably arranged in the crankcase, and one end of the camshaft is coaxially connected with a clutch; the crankcase comprises a main crankcase body, one side of the main crankcase body is open, and the main crankcase body is connected with an auxiliary crankcase body in a sealed mode. A bearing seat is arranged between the main box body and the auxiliary box body, and one end, coaxially connected with the clutch, of the cam shaft is rotatably supported on the bearing seat through a bearing; and the other end of the clutch is provided with an output shaft. The speed reducer has the advantages of being ingenious in structural design, capable of outputting low-speed and high-torque, beneficial to size reduction, capable of reducing cost and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an engine assembly and an agricultural machine. Background Art

[0002] The engine converts gasoline, diesel and other energies into kinetic energy to drive the machine. It is usually composed of a crank-connecting rod mechanism, a valve mechanism, a fuel supply system, etc. Among them, the crank-connecting rod mechanism is the main moving part of the engine to realize the working cycle and complete the energy conversion. It consists of a cylinder head, a housing, a piston-connecting rod combination, a crankshaft and a flywheel assembly, etc. During the power stroke, the piston bears the gas pressure and moves linearly in the cylinder, which is converted into the rotational motion of the crankshaft through the connecting rod, and the power is output from the crankshaft to the outside.

[0003] Usually, the power of the engine is output by the crankshaft. The characteristics of the crankshaft output are: high speed and small torque. The crankshaft needs to drive a low speed. When the torque load is large, a speed change mechanism must be added to achieve the increased torque capacity and reduced speed requirements. This crankshaft output method is only suitable for high-speed, low-torque loads. Among the load requirements, low-speed, low-torque and low-speed, high-torque loads account for the majority. Therefore, the power output of the crankshaft usually requires an external speed change mechanism, which will increase the volume of the entire structure and increase manufacturing costs. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide an engine assembly and agricultural machinery with an ingenious structural design, capable of low-speed and high-torque output, which is conducive to reducing the size and cost.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An engine assembly, characterized in that it includes a crankcase and a camshaft rotatably arranged in the crankcase, one end of the camshaft is coaxially connected to a clutch; the crankcase includes a main case body, one side of the main case body is open and is sealingly connected to a sub-case body; a bearing seat is arranged between the main case body and the sub-case body, and one end of the camshaft coaxially connected to the clutch is rotatably supported on the bearing seat through a bearing; the other end of the clutch has an output shaft.

[0007] In the above structure, the clutch and the camshaft are both arranged in the crankcase, and the camshaft drives the clutch to rotate, and the output shaft of the clutch outputs the power. Since the rotation speed of the camshaft is relatively low, it has the characteristics of low speed and high torque, so that the speed ratio requirement of the external transmission device can be reduced, and the volume of the external transmission device can be reduced, which is conducive to the miniaturization of the transmission system. At the same time, since the clutch is integrated into the crankcase, the power of the engine can be directly cut off, so as to better control the output of the power. In addition, since the clutch is arranged in the crankcase, the volume of the crankcase is increased, and the surface area of ​​the engine is increased, so that the heat dissipation of the engine can be improved.

[0008] Furthermore, a hollow hole is provided between the main housing and the auxiliary housing for the lubricating oil to flow through, and the lowest point of the hollow hole is not lower than the bottom surface of the main housing.

[0009] In this way, the lubricating oil can flow in the main case and the auxiliary case, thereby better conducting heat and facilitating the heat dissipation of the engine.

[0010] Furthermore, the bearing seat is in a circular ring shape and is integrally formed on the auxiliary housing through a plurality of connecting ribs extending in the radial direction; the hollow holes are formed between the connecting ribs.

[0011] Furthermore, the bearing seat has a first bearing hole and a second bearing hole coaxially arranged on both sides, the camshaft is rotatably mounted in the first bearing hole through a bearing, and the clutch is rotatably mounted in the second bearing hole through a bearing.

[0012] Furthermore, the camshaft or the clutch has a coaxially arranged spline hole, and the clutch or the camshaft has a spline shaft matched with the spline hole.

[0013] Furthermore, the auxiliary housing has a reduction shaft arranged in parallel with the clutch, and the output shaft of the clutch is connected to the reduction shaft through mutually meshing gear transmission.

[0014] Furthermore, the sub-case body has a speed change shaft arranged parallel to the reduction shaft, a speed change gear set is transmission-arranged between the reduction shaft and the speed change shaft, the case cover has a connecting hole coaxial with the reduction shaft and / or the speed change shaft, and the reduction shaft and / or the speed change shaft forms an output end toward one end corresponding to the connecting hole.

[0015] Furthermore, the speed change gear set includes a double gear slidably arranged on the reduction shaft, and a high-speed driven gear and a low-speed driven gear arranged on the speed change shaft, and the double gear includes a high-speed driving gear and a low-speed driving gear that can switchably mesh with the high-speed driven gear and the low-speed driven gear respectively.

[0016] Furthermore, the auxiliary box body also has a fork shaft arranged parallel to the reduction shaft, and the fork shaft has a fork for moving the double gears so that the high-speed driving gear or the low-speed driving gear is meshed with the corresponding high-speed driven gear or the low-speed driven gear.

[0017] An agricultural machine, characterized by comprising the engine assembly as described above.

[0018] In summary, the utility model has the advantages of clever structural design, capable of low-speed high-torque output, and being conducive to reducing volume and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of this embodiment.

[0020] Figure 2 It is a schematic diagram of the side structure of this embodiment.

[0021] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA.

[0022] Figure 4 and Figure 5 Schematic diagram of the decomposition structure of this embodiment.

[0023] Figure 6 and Figure 7 It is a schematic diagram of the structure of the gear transmission inside the auxiliary box.

[0024] Figure 8 It is a schematic diagram of the structure of the auxiliary box. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with an embodiment of the present invention.

[0026] When implementing: Figure 1 and Figure 8As shown, an agricultural machine includes an engine assembly, the engine assembly includes a crankcase 1, a crankshaft 2 and a camshaft 3 rotatably arranged in the crankcase 1, one end of the camshaft 3 is coaxially connected to a clutch 4, and the other end of the clutch 4 has an output shaft 41. The crankcase 1 includes a main case 11, one side of the main case 11 is open, and is sealedly connected to a sub-case 12, and the other side of the sub-case 12 is closed and provided with a case cover 13; wherein a first bearing seat 121 and a second bearing seat 122 are arranged between the main case 11 and the sub-case 12, and the two ends of the crankshaft 2 are rotatably mounted on the main case 11 and the first bearing seat 121 through bearings, respectively, and one end of the camshaft 3 and the clutch 4 are coaxially connected and rotatably supported on the second bearing seat 122 through a bearing, and the opposite ends are respectively mounted on the main case 11 and the case cover 13 through bearings.

[0027] In this embodiment, the crankshaft 2 is connected to the camshaft 3 through a reduction gear 6, and the reduction gear 6 includes a high-speed gear 61 coaxially arranged on the crankshaft 2 and a low-speed gear 62 coaxially arranged on the camshaft 3, and the high-speed gear 61 and the low-speed gear 62 are meshed with each other.

[0028] When the crankshaft rotates at high speed, the camshaft is driven to rotate at low speed through the reduction mechanism, and then transmitted to the output shaft by the clutch coaxially connected to the camshaft, so that the output speed of the engine is low and has a high output torque; because the engine output speed is low, it can be used directly or in conjunction with an external speed change mechanism with a smaller speed ratio range, which is conducive to eliminating or reducing the size of the external speed change mechanism and reducing the cost of use. In addition, because the clutch is integrated in the crankcase, it can not only make the engine itself have a power cut-off function, but also make the structure of the entire engine more compact, so that the engine can adapt to more operating scenarios, which is conducive to reducing costs.

[0029] There is a hollow hole 14 between the main housing 11 and the auxiliary housing 12 for the circulation of lubricating oil, and the lowest point of the hollow hole 14 is not lower than the bottom surface of the main housing 11. In this way, the lubricating oil flows in the main housing and the auxiliary housing, so that heat can be better conducted, which is beneficial to the heat dissipation of the engine. Specifically, the first bearing seat 121 and the second bearing seat 122 are both annular, and are integrally formed on the auxiliary housing 12 through a plurality of radially extending connecting ribs; the hollow hole 14 is formed between the connecting ribs.

[0030] like Figure 3As shown, the second bearing seat 122 has a first bearing hole and a second bearing hole coaxially arranged on both sides, the camshaft 3 is rotatably mounted in the first bearing hole through a bearing, and the clutch 4 is rotatably mounted in the second bearing hole through a bearing. The clutch 4 has a coaxially arranged spline hole, and the camshaft 3 has a spline shaft matched with the spline hole.

[0031] In this embodiment, the clutch 4 is a normally open clutch, and the clutch 4 includes a clutch fork 42 and a clutch arm shaft 43 . The clutch arm shaft 43 rotatably passes through the box cover 13 , and the clutch fork 42 is connected to the clutch arm shaft 43 .

[0032] The auxiliary housing 12 has a reduction shaft 15 and a speed change shaft 16 arranged in parallel with the crankshaft 2, a speed change gear set is arranged between the reduction shaft 15 and the speed change shaft 16, and the housing cover 13 has a connecting hole coaxial with the reduction shaft 15 and the speed change shaft 16, and the reduction shaft 15 and the speed change shaft 16 form an output end toward one end corresponding to the connecting hole. The speed change gear set includes a double gear slidably arranged on the reduction shaft 15, and a high-speed driven gear 161 and a low-speed driven gear 162 arranged on the speed change shaft 16, and the double gear includes a high-speed driving gear 151 and a low-speed driving gear 152 that can switchably mesh with the high-speed driven gear 161 and the low-speed driven gear 162, respectively. The auxiliary case 12 also has a fork shaft 17 arranged parallel to the reduction shaft 15, and the fork shaft 17 has a fork for moving the double gears so that the high-speed driving gear 151 or the low-speed driving gear 152 is meshed with the corresponding high-speed driven gear 161 or the low-speed driven gear 162.

[0033] Since the reduction shaft, speed change shaft and countershaft all have output ends that can pass through the case cover, the power of the engine is transmitted to the reduction shaft through the crankshaft, and a speed change gear set is arranged between the reduction shaft and the speed change shaft, so that the output ends of the reduction shaft and the speed change shaft can output different speeds and torques to meet the working requirements of different working conditions.

[0034] In order to provide power output at different speeds, the auxiliary housing 12 also has a secondary shaft 18 arranged in parallel with the reduction shaft 15, and the secondary shaft 18 is connected to the speed change shaft 16 through a reduction gear set. Figure 6-7As shown, in this embodiment, one end of the secondary shaft 18 passes through the box cover 13 to form an output end, and the box cover 13 has a connecting hole corresponding to the reduction shaft 15, the speed change shaft 16 and the secondary shaft 18, and the reduction shaft 15, the speed change shaft 16 and the secondary shaft 18 have internal splines at one end facing the corresponding connecting hole. In specific implementation, the number of connecting holes can be set as needed, and at the same time, the secondary shaft 18 can also be set as needed. The secondary shaft 18 is connected to the reduction shaft 15, the speed change shaft 16 or the adjacent secondary shaft 18 through a reduction gear set. In this embodiment, the clutch 4 is coaxially connected to the camshaft 3, and the engine power is transmitted from the crankshaft to the camshaft, and then transmitted to the clutch by the camshaft. In specific implementation, the clutch 4 can also be coaxially connected to the crankshaft 2, and the power is directly transmitted from the crankshaft to the clutch.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An engine assembly, characterized in that: The invention comprises a crankcase (1) and a camshaft (3) rotatably arranged in the crankcase (1), one end of the camshaft (3) being coaxially connected to a clutch (4); the crankcase (1) comprises a main case (11), one side of the main case (11) being open and sealingly connected to a sub-case (12); a bearing seat is arranged between the main case (11) and the sub-case (12), one end of the camshaft (3) and the clutch (4) being coaxially connected is rotatably supported on the bearing seat via a bearing; the other end of the clutch (4) has an output shaft (41).

2. The engine assembly according to claim 1, characterized in that: A hollow hole (14) is provided between the main housing (11) and the auxiliary housing (12) for the circulation of lubricating oil, and the lowest point of the hollow hole (14) is not lower than the bottom surface of the main housing (11).

3. The engine assembly according to claim 2, characterized in that: The bearing seat is in the form of a circular ring and is integrally formed on the auxiliary housing (12) via a plurality of radially extending connecting ribs; the hollow holes (14) are formed between the connecting ribs.

4. The engine assembly according to claim 1, characterized in that: The bearing seat has a first bearing hole and a second bearing hole coaxially arranged on both sides, the camshaft (3) is rotatably mounted in the first bearing hole via a bearing, and the clutch (4) is rotatably mounted in the second bearing hole via a bearing.

5. The engine assembly according to claim 1, characterized in that: The camshaft (3) or the clutch (4) has a coaxially arranged spline hole, and the clutch (4) or the camshaft (3) has a spline shaft arranged in cooperation with the spline hole.

6. The engine assembly according to claim 1, characterized in that: The auxiliary housing (12) has a reduction shaft (15) arranged in parallel with the clutch (4), and the output shaft (41) of the clutch (4) is connected to the reduction shaft (15) through mutually meshing gear transmission.

7. The engine assembly according to claim 6, characterized in that: The auxiliary case (12) has a speed change shaft (16) arranged in parallel with the speed reduction shaft (15), a speed change gear set is arranged between the speed reduction shaft (15) and the speed change shaft (16) in a transmission manner, a case cover (13) is provided in a closed manner on the other side of the auxiliary case (12), the case cover (13) has a connecting hole coaxial with the speed reduction shaft (15) and / or the speed change shaft (16), and the speed reduction shaft (15) and / or the speed change shaft (16) form an output end facing one end corresponding to the connecting hole.

8. The engine assembly according to claim 7, characterized in that: The speed change gear set comprises a double gear slidably arranged on the reduction shaft (15), and a high-speed driven gear (161) and a low-speed driven gear (162) arranged on the speed change shaft (16); the double gear comprises a high-speed driving gear (151) and a low-speed driving gear (152) which are respectively meshed with the high-speed driven gear (161) and the low-speed driven gear (162) in a switchable manner.

9. The engine assembly according to claim 8, characterized in that: The auxiliary case (12) also has a shift fork shaft (17) arranged parallel to the reduction shaft (15), and the shift fork shaft (17) has a shift fork for moving the double gears so that the high-speed driving gear (151) or the low-speed driving gear (152) meshes with the corresponding high-speed driven gear (161) or the low-speed driven gear (162).

10. An agricultural machine, characterized in that: The invention comprises an engine assembly as claimed in any one of claims 1 to 9.

Images