Gear integrated camshaft for air-cooled diesel engine
By adopting a gear-integrated camshaft design in an air-cooled diesel engine and integrating a camshaft and timing gear, the problems of large assembly errors and loose operation of the camshaft in a traditional air-cooled diesel engine are solved, and the accuracy and stability of the equipment are improved.
Patent Information
- Application Number
- CN202420596208.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-03-26
AI Technical Summary
The camshaft components of existing air-cooled diesel engines are connected through keyways, resulting in large assembly errors and easy to loosen during operation, affecting the performance and stability of the engine.
The gear-integrated camshaft design is adopted, where the camshaft is integrated with the camshaft timing gear and is installed through the bearing shoulder and support gear, avoiding the assembly error and looseness of the traditional split camshaft.
Improves the accuracy and accuracy of the camshaft, reduces assembly complexity and errors, and extends the service life of the equipment.
Smart Images
Figure CN222501834U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a fitting for an air-cooled diesel engine, in particular to a camshaft. Background Art
[0002] At present, all camshaft components of air-cooled diesel engines are angularly positioned and assembled with camshaft timing gears through keyways. This method has some advantages, such as different materials can be used for gears and camshafts, low complexity of forging blanks, and simple parts packaging. However, this method also has obvious disadvantages. Since the phase relationship between the camshaft components and the crankshaft components of the diesel engine is ensured by the timing point on the camshaft timing gear corresponding to the timing point on the crankshaft timing gear. Therefore, the accuracy of the action angle between the center line of the timing point of the camshaft timing gear and the camshaft valve cam and oil pump cam directly affects the phase of the diesel engine. The split gear assembly of the camshaft will lead to large assembly errors, thus affecting the performance and stability of the engine.
[0003] In addition, due to the limitations of the keyway connection method, the camshaft timing gear is prone to wear and loosening during operation, which affects the timing performance of the camshaft, resulting in reduced engine performance or even failure. Utility Model Content
[0004] In order to overcome the shortcomings of existing separately assembled camshafts, such as large assembly errors and easy loosening during operation, the utility model provides a gear-integrated camshaft for an air-cooled diesel engine.
[0005] The utility model solves the technical problem through a technical solution: a gear-integrated camshaft for an air-cooled diesel engine, comprising a camshaft with three cams and a camshaft timing gear on the camshaft, wherein the cam side of the camshaft is provided with a bearing shoulder and a bearing stop for mounting a bearing; the gear side of the camshaft is provided with a supporting stop, and the camshaft and the camshaft timing gear are integrated.
[0006] The cam types are optimized, and the three cams are exhaust cam, oil pump cam and intake cam.
[0007] To facilitate centering, a flat notch is provided on the bearing shoulder.
[0008] For the convenience of installation, a journal is provided on the side of the support gear close to the camshaft timing gear.
[0009] Preferably, the camshaft timing gear is forged on the camshaft.
[0010] In another preferred embodiment, the camshaft timing gear is welded to the camshaft.
[0011] In another preferred embodiment, the camshaft timing gear is interference-connected and integrally fixed to the camshaft by welding.
[0012] Furthermore, a camshaft timing gear fixing platform is provided on the camshaft, and the camshaft timing gear is welded on the camshaft timing gear fixing platform.
[0013] A preferred embodiment of a camshaft timing gear fixing platform, wherein the diameter of the camshaft timing gear fixing platform is 47 mm, and the diameter of the camshaft timing gear is 120 mm.
[0014] Furthermore, the width of the exhaust cam and the intake cam is 13 mm, and the width of the oil pump cam is 12 mm.
[0015] The utility model is similar to the gear camshaft used for the air-cooled diesel engine in the prior art when in use, and will not be described in detail herein.
[0016] The beneficial effects of the utility model are as follows: 1. The camshaft timing gear is integrated with the camshaft, and no additional assembly is required. 2. The errors that may be caused by machining the gear angle and the camshaft angle of the traditional split camshaft are avoided, and the precision and accuracy are improved. 3. There is no need to perform complicated assembly steps, and assembly problems that may be caused by keyway symmetry errors are avoided. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a front view schematic diagram of an embodiment.
[0018] Figure 2 is a schematic diagram of an embodiment. DETAILED DESCRIPTION
[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0020] Combined with Figures 1 to 2 A gear-integrated camshaft for an air-cooled diesel engine comprises a camshaft 1 having three cams and a camshaft timing gear 2 on the camshaft 1. The cam side of the camshaft 1 is provided with a bearing shoulder 3 and a bearing stop 4 for mounting a bearing; the gear side of the camshaft 1 is provided with a supporting stop 5. The camshaft 1 and the camshaft timing gear 2 are integrated.
[0021] The cam types are optimized, and the three cams are exhaust cam 6, oil pump cam 7, and intake cam 8 in sequence.
[0022] To facilitate centering, a flat notch is provided on the bearing shoulder 3 .
[0023] In order to facilitate installation, a journal 9 is provided on the side of the support gear 5 close to the camshaft timing gear 2 .
[0024] Furthermore, the width of the exhaust cam 6 and the intake cam 8 is 13 mm, and the width of the oil pump cam 7 is 12 mm.
[0025] This embodiment is used in the same manner as the gear camshaft used in the prior art air-cooled diesel engine, and will not be described in detail herein.
[0026] Combined with Figures 1 to 2 A gear-integrated camshaft for an air-cooled diesel engine comprises a camshaft 1 having three cams and a camshaft timing gear 2 on the camshaft 1. The cam side of the camshaft 1 is provided with a bearing shoulder 3 and a bearing stop 4 for mounting a bearing; the gear side of the camshaft 1 is provided with a supporting stop 5. The camshaft 1 and the camshaft timing gear 2 are integrated.
[0027] The cam types are optimized, and the three cams are exhaust cam 6, oil pump cam 7, and intake cam 8 in sequence.
[0028] To facilitate centering, a flat notch is provided on the bearing shoulder.
[0029] In order to facilitate installation, a journal 9 is provided on the side of the support gear 5 close to the camshaft timing gear 2 .
[0030] Preferably, the camshaft timing gear 2 is forged on the camshaft 1 .
[0031] Furthermore, the width of the exhaust cam 6 and the intake cam 8 is 13 mm, and the width of the oil pump cam 7 is 12 mm.
[0032] This embodiment is used in the same manner as the gear camshaft used in the prior art air-cooled diesel engine, and will not be described in detail herein.
[0033] Combined with Figures 1 to 2 A gear-integrated camshaft for an air-cooled diesel engine comprises a camshaft 1 having three cams and a camshaft timing gear 2 on the camshaft 1. The cam side of the camshaft 1 is provided with a bearing shoulder 3 and a bearing stop 4 for mounting a bearing; the gear side of the camshaft 1 is provided with a supporting stop 5. The camshaft 1 and the camshaft timing gear 2 are integrated.
[0034] The cam types are optimized, and the three cams are exhaust cam 6, oil pump cam 7, and intake cam 8 in sequence.
[0035] To facilitate centering, a flat notch is provided on the bearing shoulder.
[0036] In order to facilitate installation, a journal 9 is provided on the side of the support gear 5 close to the camshaft timing gear 2 .
[0037] The camshaft timing gear 2 is welded to the camshaft 1 .
[0038] The camshaft timing gear 2 is interference-connected and integrally fixed on the camshaft 1 by welding.
[0039] Furthermore, a camshaft timing gear fixing platform 10 is provided on the camshaft 1 , and the camshaft timing gear 2 is welded on the camshaft timing gear fixing platform 10 .
[0040] A preferred embodiment of a camshaft timing gear fixing platform 10 is that the diameter of the camshaft timing gear fixing platform 10 is 47 mm, and the diameter of the camshaft timing gear 2 is 120 mm.
[0041] Furthermore, the width of the exhaust cam 6 and the intake cam 8 is 13 mm, and the width of the oil pump cam 7 is 12 mm.
[0042] This embodiment is used in the same manner as the gear camshaft used in the prior art air-cooled diesel engine, and will not be described in detail herein.
[0043] The beneficial effects of the utility model are as follows: 1. The camshaft timing gear is integrated with the camshaft, and no additional assembly is required. 2. The errors that may be caused by machining the gear angle and the camshaft angle of the traditional split camshaft are avoided, and the precision and accuracy are improved. 3. There is no need to perform complicated assembly steps, and assembly problems that may be caused by keyway symmetry errors are avoided.
Claims
1. A gear-integrated camshaft for an air-cooled diesel engine, comprising a camshaft with three cams and a camshaft timing gear on the camshaft, wherein the cam side of the camshaft is provided with a bearing shoulder and a bearing stop for mounting a bearing; the gear side of the camshaft is provided with a support stop, characterized in that: The camshaft and the camshaft timing gear are integrated; a flat notch is provided on the bearing shoulder.
2. The gear-integrated camshaft for an air-cooled diesel engine according to claim 1, characterized in that: The three cams are the exhaust cam, the oil pump cam, and the intake cam.
3. The gear-integrated camshaft for an air-cooled diesel engine according to claim 1, characterized in that: The support gear is provided with a journal on one side close to the camshaft timing gear.
4. The gear-integrated camshaft for an air-cooled diesel engine according to claim 1, characterized in that: The camshaft timing gear is forged on the camshaft.
5. The gear-integrated camshaft for an air-cooled diesel engine according to claim 1, characterized in that: The camshaft timing gear is welded on the camshaft.
6. The gear-integrated camshaft for an air-cooled diesel engine according to claim 1, characterized in that: The camshaft timing gear is interference-connected and integrally fixed on the camshaft by welding.
7. The gear-integrated camshaft for an air-cooled diesel engine according to claim 1, characterized in that: A camshaft timing gear fixing platform is provided on the camshaft, and the camshaft timing gear is welded on the camshaft timing gear fixing platform.
8. The gear-integrated camshaft for an air-cooled diesel engine according to claim 7, characterized in that: The diameter of the camshaft timing gear fixing platform is 47 mm, and the diameter of the camshaft timing gear is 120 mm.
9. The gear-integrated camshaft for an air-cooled diesel engine according to claim 2, characterized in that: The width of the exhaust cam and the intake cam is 13 mm, and the width of the oil pump cam is 12 mm.