Auxiliary tool
The phaser is fixed to the camshaft through auxiliary tooling, which solves the chain tooth jump problem caused by the loose phaser during the disassembly and assembly of the engine center bolt, and realizes efficient disassembly of the center bolt and engine protection.
Patent Information
- Application Number
- CN202421565854.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During the disassembly and assembly of the engine center bolt, loose phaser leads to the timing chain tooth jump. The existing technology requires the overall disassembly of the engine, which is complicated and can easily lead to secondary tooth jump and oil outflow.
An auxiliary tool is provided, including a first pressure plate, a second pressure plate and a connecting member, through which the phaser is fixed in the axial direction of the camshaft, thereby avoiding the phaser being disengaged and the chain toothing.
Without disassembling the entire engine, the disassembly of the central bolt is achieved, avoiding the chain tooth jump, simplifying operation, and reducing engine losses and oil outflow.
Smart Images
Figure CN222726614U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of engine disassembly tools, and in particular, to an auxiliary tool. Background Art
[0002] During the disassembly and assembly process of the engine center bolt, since the center bolt has the function of fixing the phaser, when the center bolt is removed, the phaser becomes loose, causing the timing chain tensioned on the phaser to jump teeth.
[0003] Therefore, in the related art, when disassembling and assembling the center bolt, it is generally necessary to first disassemble the entire engine, such as disassembling the front cover and timing chain of the engine, and then assemble these parts on the engine after the center bolt is replaced. However, during the assembly process, due to the difficulty in assembling the timing chain tensioner, it is very likely to cause secondary tooth jumping. Utility Model Content
[0004] The purpose of the present disclosure is to provide an auxiliary tool, which can prevent the chain from jumping teeth caused by the center bolt of the engine during the disassembly and assembly process.
[0005] In order to achieve the above-mentioned objectives, the present disclosure provides an auxiliary tooling for disassembling the center bolt of an engine, wherein the engine includes a camshaft and a phaser, the camshaft and the phaser cooperate with each other and form a mounting hole, the center bolt is arranged in the mounting hole, the auxiliary tooling includes a first pressure plate, a second pressure plate and a connecting piece, the second pressure plate is arranged parallel to the first pressure plate and is connected to the first pressure plate through the connecting piece, the first pressure plate and the second pressure plate are respectively pressed on the first front end face of the phaser and the second front end face of the cam of the camshaft in the same direction in the axial direction, and an avoidance portion is arranged on the first pressure plate, and the avoidance portion is used to avoid the center bolt.
[0006] Optionally, a first notch is provided on the first pressing plate, and the first notch serves as the avoidance portion.
[0007] Optionally, a locking portion is provided on the second pressure plate, and the locking portion is used to be locked to the camshaft.
[0008] Optionally, a second notch is provided on the second pressing plate, and the second notch serves as the locking portion.
[0009] Optionally, the first notch and the second notch are configured as square openings.
[0010] Optionally, a size of the first notch in the first direction is 6 cm to 8 cm.
[0011] Optionally, the connecting members include at least two, and the at least two connecting members are arranged at intervals along the first direction.
[0012] Optionally, the first pressing plate and the second pressing plate are respectively provided with a first adjustment hole and a second adjustment hole, the first adjustment hole and the second adjustment hole are directly opposite to each other in the connecting direction of the first pressing plate and the second pressing plate, and the connecting member is arranged through the first adjustment hole and the second adjustment hole.
[0013] Optionally, the first adjustment hole and the second adjustment hole are configured as strip-shaped holes, and the strip-shaped holes extend along the first direction.
[0014] Optionally, the connecting member is configured as a bolt assembly, and the bolt assembly includes a bolt and a nut, wherein the bolt passes through the first adjustment hole and the second adjustment hole respectively and cooperates with the nut to lock the first pressing plate and the second pressing plate respectively.
[0015] Through the above technical solution, in the auxiliary tooling provided by the present invention, the first pressure plate and the second pressure plate of the auxiliary tooling can fix the phaser relative to the camshaft along the axial direction of the camshaft, so that when the center bolt is removed, the phaser can be prevented from axially disengaging due to the loss of the limitation of the center bolt, and since the chain is tensioned outside the phaser, the chain tooth jumping phenomenon caused by the axial movement of the phaser can also be avoided. In addition, since the auxiliary tooling disclosed in the present invention only requires two pressure plates and one connecting piece to realize the removal of the center bolt without disassembling the entire engine, the operation is simpler and more efficient.
[0016] In addition, the auxiliary tooling disclosed in the present invention does not require disassembly of the entire engine, thus avoiding engine loss and oil leakage problems caused by disassembly of the entire engine, thereby not only further avoiding pollution to the engine, but also avoiding unnecessary waste caused by the need to refill the oil after installation is completed.
[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0019] Figure 1 is a structural schematic diagram of an auxiliary tooling provided by an exemplary embodiment of the present disclosure;
[0020] Figure 2 The auxiliary tooling provided by the exemplary embodiment of the present disclosure is used in a state Figure 1 ;
[0021] Figure 3 The auxiliary tooling provided by the exemplary embodiment of the present disclosure is used in a state Figure 2 .
[0022] Description of Reference Numerals
[0023] 1-first pressure plate; 11-avoidance portion; 111-first notch; 12-first adjustment hole; 2-second pressure plate; 21-stop portion; 211-second notch; 22-second adjustment hole; 3-connecting piece; 31-bolt; 32-nut; 4-camshaft; 41-cam; 411-second front end face; 5-phaser; 51-first front end face; 6-center bolt. DETAILED DESCRIPTION
[0024] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0025] In the present disclosure, unless otherwise specified, directional words such as "inside" and "outside" refer to "inside" and "outside" relative to the corresponding component's own contour. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.
[0026] The center bolt 6 is an important component of the continuously variable valve timing mechanism. Affected by the cleanliness of the engine, foreign matter such as iron and aluminum inside the engine can easily cause the center bolt 6 to get stuck, so the center bolt 6 is a frequently replaced after-sales accessory. Since the center bolt 6 has a fixing effect on the phaser 5, when the center bolt 6 is disassembled, the phaser 5 will become loose, causing the chain tensioned on the phaser 5 to skip teeth.
[0027] Therefore, the difficulty that needs to be overcome in replacing the center bolt 6 is mainly the chain jumping problem caused by the loose phaser 5. In the related art, the whole engine is generally disassembled when the center bolt 6 is disassembled, such as disassembling the front cover and the timing chain, and then the engine is assembled after the replacement is completed. However, during the assembly process, on the one hand, due to the difficulty in assembling the timing chain tensioner, it is very likely to cause secondary tooth jumping. On the other hand, the existing method of disassembling the center bolt 6 also takes a long time, about six hours.
[0028] In addition, when disassembling and assembling the front cover and timing chain of the engine, the engine may be damaged and the engine oil may leak out. The leakage of the engine oil will not only pollute the engine, but also require replenishing the engine oil after the installation is completed, causing unnecessary waste.
[0029] To this end, the present disclosure provides an auxiliary tooling, referring to Figures 1 to 3 As shown in the figure, the auxiliary tooling is used to remove the center bolt 6 of the engine. The engine includes a camshaft 4 and a phaser 5. The camshaft 4 and the phaser 5 cooperate with each other and form a mounting hole (not shown in the figure). The center bolt 6 is arranged in the mounting hole. The auxiliary tooling includes a first pressure plate 1, a second pressure plate 2 and a connecting member 3. The second pressure plate 2 is arranged parallel to the first pressure plate 1 and is connected to the first pressure plate 1 through the connecting member 3. The first pressure plate 1 and the second pressure plate 2 are respectively pressed on the first front end face 51 of the phaser 5 and the second front end face 411 of the cam 41 of the camshaft 4 in the same direction in the axial direction. An avoidance portion 11 is provided on the first pressure plate 1, and the avoidance portion 11 is used to avoid the center bolt 6.
[0030] Through the above technical solution, in the auxiliary tooling provided by the present invention, the phaser 5 can be fixed relative to the camshaft 4 along the axial direction of the camshaft 4 through the first pressing plate 1 and the second pressing plate 2 of the auxiliary tooling, so that when the center bolt 6 is removed, the phaser 5 can be prevented from axially disengaging due to the loss of the limitation of the center bolt 6, and since the chain is tensioned outside the phaser 5, the chain tooth jumping phenomenon caused by the axial movement of the phaser 5 can also be avoided. In addition, since the auxiliary tooling of the present invention only requires two pressing plates and one connecting member 3, the center bolt 6 can be removed without disassembling the entire engine, so the operation is simpler and more efficient. In addition, since the auxiliary tooling of the present invention does not need to disassemble the entire engine, it avoids the engine loss and oil outflow caused by the disassembly of the entire engine, thereby not only further avoiding the pollution caused to the engine, but also avoiding the unnecessary waste caused by the need to refill the oil after the installation is completed.
[0031] It should be noted that, in the above embodiment, the first front end face 51 and the second front end face 411 both refer to the side of the phaser 5 and the cam 41 on the camshaft 4 facing the operator when the center bolt 6 is removed.
[0032] In the exemplary embodiment provided by the present disclosure, the locking portion 21 on the first pressing plate 1 can be implemented in any suitable manner, and the present disclosure does not limit this. Figure 1As shown in the figure, a first notch 111 can be provided on the first pressure plate 1, and the first notch 111 is used as an avoidance portion 11. Through such a setting, when the auxiliary tooling is used to axially press the first front end face 51 of the phase shifter 5, the center bolt 6 can be avoided through the first notch 111, so as to facilitate the disassembly of the center bolt 6.
[0033] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 As shown in the figure, the second pressure plate 2 can be provided with a locking portion 21, which is used to lock on the camshaft 4. In this way, when the phaser 5 is fixed relative to the camshaft 4 along the axial direction of the camshaft 4 by the auxiliary tooling, the locking portion 21 on the second pressure plate 2 can be locked on the camshaft 4, that is, the auxiliary tooling can be locked on the camshaft 4 through the locking portion 21. In this way, the operator's hands can be freed, and the auxiliary tooling can be fixed at the desired position by means of the cooperation between its own structure and the camshaft 4.
[0034] The locking portion 21 on the second pressing plate 2 can be implemented in any suitable manner, and the present disclosure does not limit this. Figure 1 As shown in , the second pressure plate 2 may be provided with a second notch 211 , which is used as a locking portion 21 , through which the camshaft 4 may be locked at the second notch 211 , thereby achieving locking and fixing of the auxiliary tooling.
[0035] In the exemplary embodiments provided by the present disclosure, the first notch 111 and the second notch 211 can be constructed in any suitable manner, such as a semicircular notch, a trapezoidal notch, etc., which can be flexibly selected according to actual conditions, and the present disclosure does not limit this. Figure 1 As shown in , in order to facilitate the processing of the first notch 111 and the second notch 211 , the first notch 111 and the second notch 211 can be constructed as square openings.
[0036] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 3 As shown in , in order to take into account both the avoidance of the center pin 6 and the resistance to the first front end face 51 of the phaser 5, the size of the first notch 111 in the first direction can be set to 6 cm to 8 cm. Exemplarily, the size of the first notch 111 in the first direction can be 6 cm, 6.5 cm, 7 cm, 7.5 cm or 8 cm, or any other suitable size within the numerical range of 6 cm to 8 cm, which is not limited by the present disclosure.
[0037] In the exemplary embodiment provided by the present disclosure, in order to ensure the connection strength between the first pressing plate 1 and the second pressing plate 2, the connecting member 3 may include at least two, and the at least two connecting members 3 are arranged at intervals along the first direction. Figure 1 and Figure 3 As shown in , two connecting members 3 may be provided, and the two connecting members 3 are spaced apart along the first direction.
[0038] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 3 As shown in the figure, the first pressure plate 1 and the second pressure plate 2 can be respectively provided with a first adjustment hole 12 and a second adjustment hole 22, the first adjustment hole 12 and the second adjustment hole 22 are directly opposite to each other in the connecting direction of the first pressure plate 1 and the second pressure plate 2, and the connecting member 3 is arranged through the first adjustment hole 12 and the second adjustment hole 22. Through such an arrangement, the setting position of the connecting member 3 in the first direction can be made more flexible, and can be adjusted accordingly according to actual needs, thereby avoiding other problems caused by the fixed setting position of the connecting member 3, such as narrow operating space.
[0039] In the exemplary embodiment provided by the present disclosure, the first adjustment hole 12 and the second adjustment hole 22 can be constructed in any suitable manner, and the present disclosure is not limited thereto. Figure 1 and Figure 3 As shown in , the first adjustment hole 12 and the second adjustment hole 22 can be configured as strip holes, and the strip holes extend along the first direction. In order to reduce the wear of the side edges of the strip holes on the connecting member 3, the strip holes can be further optimized into waist-shaped holes.
[0040] In the exemplary embodiments provided in the present disclosure, reference is made to Figures 1 to 3 As shown in the figure, the connecting member 3 can be constructed as a bolt assembly 3, and the bolt assembly 3 can include a bolt 31 and a nut 32. The bolt 31 passes through the first adjustment hole 12 and the second adjustment hole 22 respectively and cooperates with the nut 32 to lock the first pressure plate 1 and the second pressure plate 2 respectively. Through such a setting, not only the position between the first pressure plate 1 and the second pressure plate 2 can be fixed to avoid mutual interference between the first pressure plate 1 and the second pressure plate 2 during use, but also the distance between the first pressure plate 1 and the second pressure plate 2 can be adjusted, so as to adapt to the disassembly of the center bolt 6 on engines of different models.
[0041] When the auxiliary tooling disclosed in the present invention is in use, the plate surface of the first pressing plate 1 and the plate surface of the second pressing plate 2 are respectively pressed against the first front end surface 51 of the phaser 5 and the second front end surface 411 of the cam 41, so that the phaser 5 can be fixed relative to the camshaft 4 along the axial direction of the camshaft 4. When the center bolt 6 is disassembled later, the phaser 5 will not move along the axial direction, so that the chain tensioned on the phaser 5 will not jump teeth, which greatly improves the work efficiency. Among them, the first notch 111 on the first pressing plate 1 is used to avoid the center bolt 6, and the second notch 211 on the second pressing plate 2 is used to be clamped on the camshaft 4.
[0042] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0043] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0044] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. An auxiliary tool for disassembling a center bolt of an engine, wherein the engine comprises a camshaft and a phaser, wherein the camshaft and the phaser cooperate with each other and form a mounting hole, wherein the center bolt is arranged in the mounting hole, wherein: The auxiliary tooling includes a first pressure plate, a second pressure plate and a connecting piece, the second pressure plate is arranged parallel to the first pressure plate and connected to the first pressure plate through the connecting piece, the first pressure plate and the second pressure plate are respectively pressed against the first front end face of the phaser and the second front end face of the cam of the camshaft in the same axial direction, and the first pressure plate is provided with an avoidance portion, which is used to avoid the center bolt.
2. The auxiliary tooling according to claim 1, characterized in that: The first pressing plate is provided with a first notch, and the first notch serves as the avoidance portion.
3. The auxiliary tooling according to claim 2, characterized in that: The second pressing plate is provided with a locking portion, and the locking portion is used to be locked to the camshaft.
4. The auxiliary tooling according to claim 3, characterized in that: The second pressing plate is provided with a second notch, and the second notch serves as the locking portion.
5. The auxiliary tooling according to claim 4, characterized in that: The first notch and the second notch are configured as square openings.
6. The auxiliary tooling according to claim 5, characterized in that: The size of the first notch in the first direction is 6 cm to 8 cm.
7. The auxiliary tooling according to claim 1, characterized in that: The connecting members include at least two, and the at least two connecting members are arranged at intervals along the first direction.
8. The auxiliary tooling according to claim 7, characterized in that: The first pressing plate and the second pressing plate are respectively provided with a first adjusting hole and a second adjusting hole, the first adjusting hole and the second adjusting hole are directly opposite to each other in the connecting direction of the first pressing plate and the second pressing plate, and the connecting member is arranged through the first adjusting hole and the second adjusting hole.
9. The auxiliary tooling according to claim 8, characterized in that: The first adjustment hole and the second adjustment hole are configured as strip-shaped holes, and the strip-shaped holes extend along the first direction.
10. The auxiliary tooling according to claim 9, characterized in that: The connecting member is configured as a bolt assembly, and the bolt assembly includes a bolt and a nut. The bolt passes through the first adjustment hole and the second adjustment hole respectively and cooperates with the nut to lock the first pressing plate and the second pressing plate respectively.