Timing point adjusting and positioning tool for engine assembly
By designing a timing adjustment and positioning tool for engine assembly, the problems of slow adjustment speed and high precision requirements in the existing technology were solved, realizing fast and accurate timing adjustment, improving assembly efficiency and quality, and reducing costs.
Patent Information
- Application Number
- CN202520116327.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-17
AI Technical Summary
The existing engine timing adjustment process is slow and requires high precision, resulting in low production efficiency and potential quality problems. Traditional manual adjustment is prone to errors.
Design a timing adjustment and positioning tool that includes a connecting base, an upper positioning pin, a retaining seat, a rotating handle, and a lower positioning block. Through modular design and a high-precision positioning structure, it achieves fast and accurate timing adjustment.
It improves engine assembly efficiency and quality, reduces human error, lowers maintenance costs, adapts to various engine models, and has flexibility and modular upgrade capabilities.
Smart Images
Figure CN223820449U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a timing point adjustment positioning tool for engine assembly belongs to engine assembly technical field. BACKGROUND
[0002] Engine timing point refers to the time points when intake and exhaust valves open and close during engine operation, as well as the relationship between these time points and piston position. Correct timing is crucial for ensuring normal engine operation, improving fuel efficiency, reducing emissions, and guaranteeing engine performance. Improper timing can lead to decreased engine performance and even damage.
[0003] In practical applications, timing points are usually represented by crankshaft angle, i.e., position relative to 360-degree rotation of the crankshaft. For example, "10 degrees before top dead center" means 10 degrees of crankshaft angle before the piston reaches the top of the compression stroke. By adjusting the position of the timing belt or chain, we ensure that the valves open and close according to the manufacturer's specified timing map. This adjustment process often requires the use of specialized tools, and accurate setting of the timing point is crucial to ensure that the engine operates efficiently and reliably.
[0004] During engine assembly, the adjustment of the timing point position is a particularly important adjustment process. Timing adjustment is generally done through three points: intake valve, exhaust valve, and crankshaft pulley. In particular, when assembling the crankshaft pulley, the crankshaft angle position is usually not at the timing point, so each engine needs to rotate the crankshaft pulley to align with the crankshaft timing point during assembly. During this process, the reference points for aligning the timing point are marked with lines on the crankshaft pulley and front cover positions, and the operator needs to slowly rotate the crankshaft pulley until the timing point lines on the crankshaft pulley and front cover are completely aligned.
[0005] However, the existing timing point adjustment process has some problems. First, the adjustment speed is relatively slow, and the work station also needs to accommodate other assembly content, resulting in low production efficiency. Second, the timing point positioning process requires very high accuracy, even a one-millimeter deviation can cause engine timing failure, resulting in mismatched valve opening and closing times, and thus quality risks.
[0006] In addition, the traditional manual alignment method not only slows down the overall assembly efficiency, but also is prone to errors due to manual operation. Manually adjusting the crankshaft pulley is a relatively laborious process, and the complexity of the timing point adjustment step often slows down the overall progress. Therefore, it is necessary to develop a more efficient and accurate engine timing point adjustment tool to improve assembly efficiency and quality. UTILITY MODEL CONTENT
[0007] The utility model provides a timing point adjustment positioning tool for engine assembly to solve the problems in the prior art.
[0008] To achieve the above object, the utility model takes the following technical scheme: a timing point adjustment positioning tool for engine assembly, comprising a connecting base, an upper positioning pin, a retaining seat, a rotating handle and a lower positioning block, the connecting base comprises a rectangular plate and a circular plate, the outer side wall of the circular plate is fixedly connected with one end of the rectangular plate, one end of the rectangular plate is fixedly connected with the mounting end of the rotating handle, the other end of the rectangular plate is fixedly connected with the retaining seat, the upper positioning pin is inserted into the retaining seat, the upper positioning pin is vertically inserted into the rectangular plate, the upper positioning pin is inserted into the idler gear mounting hole of the front cover in cooperation, the circular plate is fixedly connected with the one end surface of the circular base body of the lower positioning block, two positioning claws are fixedly arranged on the other end surface of the lower positioning block base body, and the two positioning claws are inserted into the weight-reducing hole of the crankshaft pulley in cooperation.
[0009] The rectangular plate and the circular plate are integrally formed, and the materials of the rectangular plate and the circular plate are both steel.
[0010] The inner end of the upper positioning pin is slidably inserted into the connecting base, a return spring is sleeved on the outer side of the inner end of the upper positioning pin, one end of the return spring is abutted against the inner end of the upper positioning pin, and the other end of the return spring is abutted against the retaining seat.
[0011] A position retaining bushing is arranged between the inner end of the upper positioning pin and the connecting base, and the position retaining bushing is fixedly connected with the retaining seat.
[0012] The outer end of the upper positioning pin is detachably fixedly connected with the positioning pin pull bolt through a connecting bolt, and the upper positioning pin is detachably connected with the retaining seat and the retaining bushing.
[0013] The rotating handle is made of nylon.
[0014] The lower positioning block is made of nylon.
[0015] Compared with the prior art, the utility model has the advantages that:
[0016] 1. The utility model can rotate the crankshaft angle, quickly adjust the crankshaft pulley to the timing point position, realize two-point positioning, ensure that the crankshaft pulley is fixed after being rotated to the timing point, prevent the position from deviating before other timing wheel systems are assembled, improve work efficiency and precision, simplify the operation process, reduce human errors, be suitable for various models of engines, and improve the safety and reliability of assembly.
[0017] 2, The utility model ensures the accuracy of adjusting the belt pulley to the correct timing point position, reduces the quality problem caused by human factors. Optimize the work flow of the whole assembly line, so that the operator can more efficiently complete the operation content, and reduce the burden of the operator.
[0018] 3, The utility model discloses simple and clear whole design, through the combination of connecting base, upper positioning pin and retaining seat, rotating handle and lower positioning block, can complete main function, reduces unnecessary complexity, makes the tool more easy to understand and use.
[0019] 4, The utility model discloses that due to modular design and standardization assembly, such as the separately replaceable upper positioning pin and the wear part of nylon material, reduce the cost of maintenance and maintenance. At the same time, select the economical and practical but reliable performance material, guarantee quality while also control the manufacturing cost.
[0020] 5, The utility model can adapt to the installation demand of various different types of engine and its related parts, and can find suitable positioning mode to carry out timing point adjustment. In addition, its flexibility allows appropriate structural adjustment according to specific application scene, meets the specific work requirement.
[0021] 6, The utility model can change the layout of the whole tool by adjusting the position of each component or replacing the part of suitable size / shape to meet different positioning requirements. For example, by replacing the upper positioning pin of different length or the angle of rotating handle, the effective fixation of different model crankshaft belt pulley can be realized, so as to ensure the accuracy in the process of timing point adjustment.
[0022] 7, The utility model has the characteristics of modularization, when there is new technical progress or finds better material, can easily upgrade or replace single component, without needing to completely redesign the whole tool, improves the service life of product. DRAWINGS
[0023] Figure 1 It is the front view of the utility model;
[0024] Figure 2 It is the side view of Figure 1
[0025] Figure 3 It is the connecting relationship diagram of connecting base, upper positioning pin and retaining seat. DETAILED DESCRIPTION
[0026] Clearly, 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 person skilled in the art without making creative labor belong to the range of protection of the utility model.
[0027] A timing point adjusting positioning tool for engine assembly, comprising a connecting base 1, an upper positioning pin 2, a retaining seat 3, a rotating handle 4 and a lower positioning block 5, the connecting base 1 comprises a rectangular plate and a circular plate, the outer side wall of the circular plate is fixedly connected with one end of the rectangular plate, the one end of the rectangular plate is fixedly connected with the mounting end of the rotating handle 4, the rotating handle 4 is convenient for taking the tool, the rotating handle 4 can rotate 360 degrees between the intermediate shaft, and the crankshaft pulley is conveniently rotated, the other end of the rectangular plate is fixedly connected with the retaining seat 3, the upper positioning pin 2 is inserted into the retaining seat 3, the upper positioning pin 2 is vertically inserted into the rectangular plate, the center point of the upper positioning pin is the positioning point to the center point of the crankshaft pulley, the upper positioning pin 2 is inserted into the front cover idler mounting hole in cooperation, the circular plate is detachably fixedly connected with the one end surface of the circular base body of the lower positioning block 5, and the lower positioning block 5 can be individually replaced, two positioning claws are fixedly arranged on the other end surface of the base body of the lower positioning block 5, and the two positioning claws are inserted into the crankshaft pulley lightening hole in cooperation.
[0028] The connecting base 1 is the base of the whole tool, the overall shape is as shown in the drawing, considering the strength in the process of using the tool, the rectangular plate and the circular plate are integrally formed, the materials of the rectangular plate and the circular plate are steel, and the firmness after installation of various connecting components and the durability in the process of using are ensured.
[0029] The inner end of the upper positioning pin 2 is slidably inserted into the connecting base 1, a return spring 8 is sleeved on the outer side of the inner end of the upper positioning pin 2, one end of the return spring 8 abuts against the inner end of the upper positioning pin 2, the other end of the return spring 8 abuts against the retaining seat 3, and the return spring 8 helps the upper positioning pin 2 to return after being pulled back.
[0030] In order to keep the coaxiality of the upper positioning pin 2, a position keeping bushing 9 is arranged between the inner end of the upper positioning pin 2 and the connecting base 1, and the position keeping bushing 9 is fixedly connected with the retaining seat 3.
[0031] In view of the wear of the upper locating pin 2 during use, the outer end of the upper locating pin 2 is detachably fixedly connected with the locating pin pull bolt 6 through the connecting bolt 7, the retaining seat 3 is provided with a slot along the movement direction of the upper locating pin 2, the locating pin pull bolt 6 is provided with a plug block matched with the slot along the movement direction of the upper locating pin 2, when the plug block is separated from the slot, the return spring 8 is in a compressed state, and the return spring 8 is in a compressed state in the initial use. The upper locating pin 2 is detachably connected with the retaining seat 3 and the retaining bush 9, the upper locating pin 2 is designed to be movable and detachable, so that subsequent replacement is facilitated, and the replacement cost is relatively low.
[0032] The rotating handle 4 is made of nylon.
[0033] The lower locating block 5 is made of nylon because the lower locating block 5 is in contact with the crankshaft pulley and generates a large friction force, so that the parts are prevented from being damaged, and the strength can be ensured and the parts are prevented from being damaged.
[0034] The method for finding the locating points is as follows:
[0035] 1. After aligning the timing scale points of the crankshaft pulley and the timing scale points of the front cover, the offset angle of the two weight reduction holes of the crankshaft pulley relative to the shaft center is measured;
[0036] 2. The distance between the center point of the position of the idler pulley mounting hole of the front cover and the crankshaft pulley is measured to determine the position of the upper locating pin 2;
[0037] 3. The size of the weight reduction hole of the crankshaft pulley is measured to determine the size of the two locating claws of the lower locating block 5, and the cooperation gap between the locating claw and the weight reduction hole of the crankshaft pulley is less than or equal to 0.5 mm;
[0038] 4. The inner diameter size of the idler pulley mounting hole of the front cover is measured to determine the outer diameter size of the upper locating pin 2, and the cooperation gap between the upper locating pin 2 and the idler pulley mounting hole of the front cover is less than or equal to 0.5 mm;
[0039] 5. The two locating points of the tool are determined by the above method.
[0040] The use method of the utility model is as follows:
[0041] The operator holds the rotating handle 4, positions the direction to the engine direction, inserts the two positioning claws of the lower positioning block 5 into the two lightening holes of the crankshaft pulley, rotates the tool counterclockwise, stops rotating when the timing point of the crankshaft pulley corresponds to the timing point of the front cover, pulls and positions the pin pull bolt 6 to the plug alignment slot, inserts the upper positioning pin 2 into the idler pulley mounting hole by releasing the positioning pin pull bolt 6, at this time, the timing point adjustment and two-point positioning are completed, the operator can continue to operate other assembly items, after all the items are assembled, one hand holds the rotating handle 4, the other hand pulls the upper positioning pin 2 backward to take down the tool, and a working cycle is completed.
[0042] The utility model is suitable for positioning during the assembly process of the engine timing sprocket, and is used for ensuring that the crankshaft angle does not change during the assembly process, the utility model can quickly adjust the crankshaft pulley to the timing point position by rotating the crankshaft angle, and simultaneously realizes the timing point adjustment positioning tool of two-point positioning, so that the crankshaft pulley can be fixed after being rotated to the timing point position, and the timing point of other timing wheel systems before assembly can be prevented from moving.
[0043] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point, the embodiments should be regarded as exemplary and non-restrictive, the scope of the utility model is defined by the appended claims instead of the above description, and therefore, all changes falling within the meaning and scope of the equivalent conditions of the claims should be included in the utility model. Any figure mark in the claims should not be regarded as limiting the involved claims.
[0044] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A timing point adjustment and positioning tool for engine assembly, characterized in that: The system includes a connecting base (1), an upper positioning pin (2), a retaining seat (3), a rotating handle (4), and a lower positioning block (5). The connecting base (1) includes a rectangular plate and an annular plate. The outer wall of the annular plate is fixedly connected to one end of the rectangular plate. One end of the rectangular plate is fixedly connected to the mounting end of the rotating handle (4). The other end of the rectangular plate is fixedly connected to the retaining seat (3). An upper positioning pin (2) is inserted into the retaining seat (3). The upper positioning pin (2) is perpendicularly inserted into the rectangular plate. The upper positioning pin (2) is engaged with the idler wheel mounting hole of the front cover. The annular plate is fixedly connected to one end face of the annular base of the lower positioning block (5). Two positioning claws are fixedly provided on the other end face of the base of the lower positioning block (5). The two positioning claws are engaged with the weight reduction hole of the crankshaft pulley.
2. The timing adjustment and positioning tool for engine assembly according to claim 1, characterized in that: The rectangular plate and the circular plate are integrally formed, and both the rectangular plate and the circular plate are made of steel.
3. The timing adjustment and positioning tool for engine assembly according to claim 2, characterized in that: The inner end of the upper positioning pin (2) is slidably inserted into the connecting base (1), and a return spring (8) is fitted on the outer side of the inner end of the upper positioning pin (2). One end of the return spring (8) abuts against the inner end of the upper positioning pin (2), and the other end of the return spring (8) abuts against the retaining seat (3).
4. The timing adjustment and positioning tool for engine assembly according to claim 3, characterized in that: A position retaining bushing (9) is provided between the inner end of the upper positioning pin (2) and the connecting base (1), and the position retaining bushing (9) is fixedly connected to the retaining seat (3).
5. The timing adjustment and positioning tool for engine assembly according to claim 4, characterized in that: The outer end of the upper positioning pin (2) is detachably fixed to the positioning pin pull bolt (6) by the connecting bolt (7). The upper positioning pin (2) is detachably connected to the retaining seat (3) and the retaining bushing (9).
6. The timing adjustment and positioning tool for engine assembly according to claim 5, characterized in that: The rotating handle (4) is made of nylon.
7. A timing adjustment and positioning tool for engine assembly according to claim 1 or 6, characterized in that: The lower positioning block (5) is made of nylon.