Crankshaft and camshaft positioning and locking device capable of accurately aligning
By designing camshaft positioning and locking fixtures and crankshaft positioning and stopping fixtures, the accuracy problem of timing system in engine assembly was solved, achieving a high-precision, stable, and efficient assembly process, ensuring the normal operation and performance of the engine.
Patent Information
- Application Number
- CN202520565006.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-27
AI Technical Summary
In the current automotive engine assembly process, the accuracy of the timing system is difficult to guarantee, resulting in large phase deviations and poor consistency, as well as low assembly precision and efficiency.
The camshaft positioning and locking fixture and the crankshaft positioning and stopping fixture are connected to the cylinder head and cylinder block through a specific design to ensure the precise positioning of the camshaft and crankshaft. Stable fixation is achieved by using fitting grooves and scale marks to prevent displacement and rotation.
It improves the assembly accuracy and stability of the engine timing system, reduces adjustment time, enhances ease of operation, adapts to different engine models, and ensures normal engine operation and performance.
Smart Images
Figure CN223876906U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to engine assembly technical field, concretely is a kind of accurate timing crankshaft and camshaft positioning locking device. BACKGROUND
[0002] In the assembly process of automobile engine, the accuracy of timing is crucial to ensure the normal operation of engine, and the inaccuracy of timing system installation may cause large phase deviation and poor consistency of engine, with the development of modern automobile technology, the precision requirement of timing is higher and higher, therefore, a kind of accurate, efficient and easy-to-operate timing installation device is particularly important. INVENTION CONTENTS
[0003] To solve the problems in the background art, the utility model provides a kind of accurate timing crankshaft and camshaft positioning locking device.
[0004] To achieve the above object, the utility model takes the following technical scheme: a kind of accurate timing crankshaft and camshaft positioning locking device, including camshaft positioning locking tool, cylinder body, crankshaft positioning stop tool, positioning tool positioning surface, crankshaft, cylinder cover, two camshafts and two camshaft stop structures;
[0005] Two camshafts are provided on the cylinder cover, camshaft stop structure is provided on each camshaft, the lower end of the camshaft positioning locking tool is provided with two clamping grooves matched with the camshaft stop structure, the camshaft positioning locking tool is limitingly connected with the two camshaft stop structures and is fixedly connected with the cylinder cover, the cylinder cover is detachably connected with the cylinder body, the cylinder body is provided with the crankshaft, the camshaft positioning locking tool is provided with the positioning tool positioning surface, the crankshaft is provided with the crankshaft crankpin machine face matched with the positioning tool positioning surface, the cylinder body is provided with the bolt hole matched with the crankshaft positioning stop tool, the crankshaft positioning stop tool is threadedly connected with the bolt hole and is abutted on the crankshaft crankpin machine face through the positioning tool positioning surface.
[0006] The lower end of the camshaft positioning locking tool is provided with two matching recesses matched with the cylinder cover, and the recesses are connected with the cylinder cover.
[0007] The crankshaft crankpin machine face is concave, and the positioning tool positioning surface is convex, and the shapes of the two are matched to limit the rotation of the crankshaft.
[0008] The crankshaft positioning stop tool is provided with scale marks, and the length of the crankshaft positioning stop tool extending into the crankcase is adjusted.
[0009] The end of the crankshaft positioning stop tool is provided with an anti-skid handle.
[0010] Compared with the prior art, the utility model has the advantages that:
[0011] 1. Improved assembly precision: Through the specific design of the camshaft positioning locking tool and the crankshaft positioning stop tool, the camshaft and crankshaft can be accurately positioned at the required position, effectively avoiding the problem of timing misalignment caused by unstable position or rotation. This high-precision positioning supports fast and reliable locking function, thereby greatly improving the assembly precision of the engine timing system.
[0012] 2. Enhanced stability: The camshaft positioning locking tool closely fits the cylinder head with the matching groove, enhancing the stability of the tool and preventing the tool from shifting during installation. This design ensures that the camshaft stop structure is completely locked, further ensuring the fixity of the camshaft angle.
[0013] 3. Improved work efficiency: Using this device for the installation of the timing system can significantly reduce the adjustment time and human errors during assembly. The tool method simplifies the assembly process, making the operation more convenient and efficient, thereby improving the overall work efficiency.
[0014] 4. Strong adaptability: The crankshaft positioning stop tool is provided with scale marks and anti-slip handles, which can accurately adjust the length of the tool inserted into the crankcase and conveniently tighten the tool. This design makes the device adaptable to different models and specifications of engines, improving its versatility and practicality.
[0015] 5. Ensuring engine performance: Since this device can ensure the accuracy of the timing of the crankshaft and camshaft, it can ensure the normal operation and performance of the engine. The precise installation of the timing system has important influence on the power output, fuel economy and emission performance of the engine.
[0016] In summary, the utility model has significant beneficial effects in improving assembly precision, enhancing stability, improving work efficiency, strong adaptability and ensuring engine performance. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is the front view of the utility model;
[0018] Figure 2 is the camshaft positioning locking tool structure schematic view of the utility model;
[0019] Figure 3 is the cylinder body, crankshaft positioning stop tool and crankshaft connection relationship schematic view of the utility model;
[0020] Figure 4 is the crankshaft positioning stop tool structure schematic view of the utility model. DETAILED DESCRIPTION
[0021] Clearly and completely describe the technical scheme in the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments, based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative efforts belong to the range of the utility model protection.
[0022] The embodiment discloses a crankshaft and camshaft positioning and locking device for accurately aligning time, comprising a camshaft positioning and locking tool 1, a cylinder body 6, a crankshaft positioning and locking tool 7, a positioning tool positioning surface 8, a crankshaft 9, a cylinder cover 11, two camshafts 10 and two camshaft locking structures 2.
[0023] The cylinder cover 11 is provided with two camshafts 10, each of the camshafts 10 is provided with a camshaft locking structure 2, the lower end of the camshaft positioning and locking tool 1 is provided with two clamping grooves matched with the camshaft locking structures 2, the camshaft positioning and locking tool 1 is limitingly clamped with the two camshaft locking structures 2 and is fixedly connected with the cylinder cover 11, the cylinder cover 11 is detachably connected with the cylinder body 6, the cylinder body 6 is provided with the crankshaft 9, the crankshaft positioning and locking tool 7 is provided with the positioning tool positioning surface 8, the crankshaft 9 is provided with a crankshaft crank web surface 4 matched with the positioning tool positioning surface 8, the cylinder body 6 is provided with a bolt hole 5 matched with the crankshaft positioning and locking tool 7, the crankshaft positioning and locking tool 7 is threadedly connected with the bolt hole 5 and is abutted on the crankshaft crank web surface 4 through the positioning tool positioning surface 8.
[0024] The lower end of the camshaft positioning and locking tool 1 is provided with two matching recesses 3 matched with the cylinder cover 11, and the matching recesses 3 are clamped with the cylinder cover 11.
[0025] The crankshaft crank web surface 4 is a concave surface, and the positioning tool positioning surface 8 is a convex surface, and the two are matched in shape to limit the rotation of the crankshaft 9.
[0026] The crankshaft positioning and locking tool 7 is provided with a scale mark, and the length of the crankshaft positioning and locking tool 7 extending into the crankcase is adjusted.
[0027] The end of the crankshaft positioning and locking tool 7 is provided with an anti-skid handle.
[0028] The two clamping grooves at the lower end of the camshaft positioning and locking tool 1 are aligned with the camshaft locking structures 2 on the two camshafts 10, the camshafts 10 are fixed in the circumferential position through the limit clamping, meanwhile, the matching recesses 3 of the tool are closely matched with the cylinder cover 11, the stability is enhanced, and the tool is prevented from deviating, at this time, the camshaft locking structures 2 are completely locked, the angle of the camshafts 10 is fixed, and the camshafts 10 cannot rotate.
[0029] Then the crankshaft positioning stop tool 7 is screwed into the bolt hole 5 of the cylinder block 6, the length of the tool inserted into the crankcase is adjusted through the anti-skid handle (the scale mark helps to adjust accurately), until the crankshaft crank web 4 (concave surface) is in full contact with the positioning tool positioning surface 8 (convex surface), at this time, the crankshaft 9 is accurately locked and cannot rotate;
[0030] After the accurate positioning of the crankshaft and the camshaft is completed, the timing chain, the chain wheel, the tensioner and other components are installed in sequence according to the installation requirements of the engine timing system, and finally the installation work of the engine timing system is completed.
[0031] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent conditions of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.
Claims
1. An accurate timing crankshaft and camshaft positioning lock device, characterized by: The camshaft positioning locking tool (1), the cylinder body (6), the crankshaft positioning locking tool (7), the positioning tool positioning surface (8), the crankshaft (9), the cylinder cover (11), two camshafts (10) and two camshaft locking structures (2) are included. The cylinder cover (11) is provided with two camshafts (10), each of which is provided with a camshaft locking structure (2), the lower end of the camshaft positioning locking tool (1) is provided with two clamping grooves matched with the camshaft locking structure (2), the camshaft positioning locking tool (1) is limitingly clamped with the two camshaft locking structures (2) and fixedly connected with the cylinder cover (11), the cylinder cover (11) is detachably connected with the cylinder body (6), the cylinder body (6) is provided with the crankshaft (9), the crankshaft positioning locking tool (7) is provided with the positioning tool positioning surface (8), the crankshaft (9) is provided with the crankshaft crank web surface (4) matched with the positioning tool positioning surface (8), the cylinder body (6) is provided with the bolt hole (5) matched with the crankshaft positioning locking tool (7), the crankshaft positioning locking tool (7) is threadedly connected with the bolt hole (5) and abuts against the crankshaft crank web surface (4) through the positioning tool positioning surface (8).
2. A timing accurate crankshaft and camshaft positioning lock device according to claim 1, characterized in that: The lower end of the camshaft positioning locking tool (1) is provided with two matching recesses (3) matched with the cylinder cover (11), and the recesses (3) are clamped with the cylinder cover (11).
3. An accurate alignment in time crankshaft and camshaft positioning locking device according to claim 1, characterized in that: The crankshaft crank web surface (4) is a concave surface, and the positioning tool positioning surface (8) is a convex surface, and the two are matched in shape to limit the rotation of the crankshaft (9).
4. A timing accurate crankshaft and camshaft positioning lock device as set forth in claim 1, wherein: The crankshaft positioning locking tool (7) is provided with a scale mark, and the length of the crankshaft positioning locking tool (7) extending into the crankcase is adjusted.
5. A timing accurate crankshaft and camshaft position locking device as claimed in claim 4, characterized in that: The end of the crankshaft positioning locking tool (7) is provided with an anti-skid handle.