Tool for engine timing system

Abstract

The utility model relates to a tool for an engine timing system, and the tool comprises a first locking piece which is used for being detachably connected with a cam shaft tile cover, and the first locking piece is provided with a clamping groove for locking a cam shaft; and the second locking piece is connected to the first locking piece and is provided with a stopping part, and the stopping part is used for stopping the outer side of the CVVT mechanism so as to limit the CVVT mechanism to be separated from the cam shaft. The tool for the engine timing system is favorable for reducing the maintenance difficulty of the engine timing system.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of engine assembly, in particular, to a tool for engine timing system. BACKGROUND

[0002] In the engine timing system, the center pin is usually connected with the camshaft to fix and adjust the position of the CVVT (Continue Variable Valve Timing) mechanism. When the engine timing system is repaired, the center pin needs to be removed. In the related art, when the center pin is removed, the CVVT is prone to position deviation or even falling off relative to the camshaft, resulting in high repair difficulty. CONTENT

[0003] The purpose of the present disclosure is to provide a tool for engine timing system, which can reduce the difficulty of engine timing system repair.

[0004] In order to achieve the above purpose, the present disclosure provides a tool for engine timing system, comprising: a first locking member, which is used to be detachably connected with a camshaft bushing cover, and has a clamping groove for locking a camshaft; and a second locking member, which is connected to the first locking member and has a stop portion for stopping outside a CVVT mechanism to limit the CVVT mechanism from being separated from the camshaft.

[0005] Optionally, an adjusting structure is connected between the second locking member and the first locking member, and the adjusting structure is used to adjust the position of the second locking member relative to the first locking member in the axial direction of the camshaft.

[0006] Optionally, the adjusting structure comprises a mounting hole, a strip-shaped slot and a fastener, one of the first locking member and the second locking member is provided with the mounting hole, the other of the first locking member and the second locking member is provided with the strip-shaped slot, the strip-shaped slot extends in the axial direction of the camshaft, and the fastener is arranged in the strip-shaped slot and connected to the mounting hole.

[0007] Optionally, the stop portion is configured as a stop plate, the stop plate is arranged perpendicularly to the axis of the camshaft, and the stop plate is used to abut against the CVVT mechanism.

[0008] Optionally, an avoiding slot is formed in the stop plate, the avoiding slot is used to pass through the center pin and expose the center pin in the avoiding slot, the center pin is connected with the camshaft, and the center pin is used to lock the CVVT mechanism on the camshaft.

[0009] Optionally, the engine comprises an outer end cover for shielding the CVVT mechanism, a preset gap is formed between the outer end cover and the CVVT mechanism, and the stopper is arranged in the preset gap and abuts against the CVVT mechanism.

[0010] Optionally, the second locking member is configured in an L-shaped structure and comprises a connecting plate and the stopper plate which are perpendicular to each other, and the connecting plate is detachably connected with the first locking member.

[0011] Optionally, the number of the clamping grooves is the same as that of the second locking members, and the number of the clamping grooves is at least two, and the two clamping grooves have a preset interval in the radial direction of the camshaft.

[0012] Optionally, the first locking member comprises a first plate and a second plate which are connected perpendicularly, the first plate is detachably connected with the camshaft bearing cap, the clamping groove is formed on the second plate, and the first plate is located between two adjacent clamping grooves.

[0013] Optionally, the second plate has a fixing portion at an end away from the clamping groove, the fixing portion is configured as a nut, the nut is welded to the second part, and the second locking member is connected to the first locking member through the nut.

[0014] According to the above technical solution, in the tooling for the engine timing system provided by the present disclosure, the first locking member is used to be detachably connected with the camshaft bearing cap, and the first locking member has the clamping groove for locking the camshaft, so that the first locking member can limit the rotation of the camshaft when the engine timing system is maintained. The second locking member is connected to the first locking member and has the stopper, and the stopper can limit the CVVT mechanism from being separated from the camshaft, so that when the engine timing system is maintained, the cooperation of the first locking member and the second locking member can avoid the rotation of the camshaft and the separation of the CVVT mechanism from the camshaft, which facilitates the maintenance personnel to remove the center pin, reduces the difficulty of maintenance, and is beneficial to ensuring the precision of engine assembly.

[0015] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure but do not constitute a limitation on the present disclosure. In the drawings:

[0017] Figure 1 is a mounting schematic view of the tooling for the engine timing system provided by the exemplary embodiments of the present disclosure;

[0018] Figure 2 is a structural schematic view of a first locking piece of a tool for an engine timing system provided by an exemplary embodiment of the present disclosure;

[0019] Figure 3 is another structural schematic view of a first locking piece of a tool for an engine timing system provided by an exemplary embodiment of the present disclosure;

[0020] Figure 4 is a structural schematic view of a second locking piece of a tool for an engine timing system provided by an exemplary embodiment of the present disclosure;

[0021] Figure 5 is a schematic view of the installation between a CVVT mechanism, a camshaft and a camshaft bearing cap provided by an exemplary embodiment of the present disclosure.

[0022] BRIEF DESCRIPTION OF DRAWINGS

[0023] 1 - first locking piece; 10 - camshaft bearing cap; 100 - adjusting structure; 101 - clamping groove; 102 - mounting hole; 103 - fixing hole; 11 - first plate; 12 - second plate; 13 - fixing part; 2 - camshaft; 20 - preset gap; 21 - clamping part; 3 - second locking piece; 30 - strip-shaped groove; 31 - stop part; 311 - avoiding groove; 312 - avoiding hole; 32 - connecting plate; 4 - CVVT mechanism; 5 - center pin; 6 - outer end cover. DETAILED DESCRIPTION

[0024] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0025] In the present disclosure, the terms "first", "second" and the like used herein are used to distinguish one element from another element, and do not have sequential and important meanings. In the following description, the same reference numerals in different drawings represent the same or similar elements unless otherwise explained. The above definition is only used to explain and illustrate the present disclosure, and should not be understood as a limitation of the present disclosure.

[0026] It should be noted that when the automobile engine is working, the four processes of intake, compression, work and exhaust are repeatedly carried out in the cylinder, and each process needs to be matched with the movement state and position of the piston, so that the lifting of the intake and exhaust pistons is coordinated with each other. Therefore, an engine timing system is provided in the engine to make the intake valve and the exhaust valve of the engine open or close properly, so as to ensure that the cylinder of the engine can normally inhale and exhaust air, and therefore the engine timing system plays the role of a middle bridge.

[0027] In the engine timing system, as shown in Figure 1 and Figure 5 The center pin 5 is usually connected with the camshaft 2 to fix and adjust the position of the CVVT mechanism 4, when the engine timing system needs to be repaired, the center pin 5 needs to be removed, before the dismounting operation, the position of the camshaft 2 and the CVVT mechanism 4 needs to be fixed to avoid the problem of timing misalignment, which is beneficial to reduce the difficulty of repair.

[0028] Based on the above, as shown in Figures 1 to 4 the present disclosure provides a tool for engine timing system, comprising: a first locking piece 1 for detachable connection with the camshaft bushing cover 10, the first locking piece 1 has a clamping groove 101 for locking the camshaft 2; a second locking piece 3 connected to the first locking piece 1, and having a stop portion 31 for stopping outside the CVVT mechanism 4 to limit the CVVT mechanism 4 from disengaging the camshaft 2.

[0029] Through the above technical scheme, in the tool for engine timing system provided by the present disclosure, the first locking piece 1 and the second locking piece 3 are provided, since the first locking piece 1 is used for detachable connection with the camshaft bushing cover 10, and the first locking piece 1 has a clamping groove 101 for locking the camshaft 2, therefore, the first locking piece 1 can limit the rotation of the camshaft 2 when the engine timing system is repaired, since the second locking piece 3 is connected to the first locking piece 1, and has a stop portion 31, which can limit the CVVT mechanism 4 from disengaging the camshaft 2, therefore, when the engine timing system is repaired, through the cooperation of the first locking piece 1 and the second locking piece 3, on the one hand, the rotation of the camshaft 2 can be avoided, on the other hand, the CVVT mechanism 4 can be prevented from disengaging the camshaft 2, which is convenient for the maintenance personnel to remove the center pin 5, reduces the difficulty of repair, and is beneficial to ensure the precision of engine assembly.

[0030] Among them, through the first locking piece 1, after the center pin 5 is dismounted, the camshaft 2 is still in the position before dismounting, avoiding the problem of timing misalignment caused by timing skip, through the second locking piece 3, avoiding the CVVT mechanism 4 from disengaging the camshaft 2, saving the maintenance personnel from the trouble of installing the CVVT mechanism 4 again, which is beneficial to reduce the difficulty of repair and improve the efficiency of repair.

[0031] According to the exemplary embodiments of the present disclosure, as shown in Figure 1As shown in FIG. 1, the second locking member 3 can be connected with the first locking member 1 through an adjusting structure 100, and the adjusting structure 100 is used to adjust the position of the second locking member 3 relative to the first locking member 1 in the axial direction of the camshaft 2. By arranging the adjusting structure 100, the position of the second locking member 3 in the axial direction of the camshaft 2 can be adjusted, so that when the CVVT mechanism 4 with different thickness (i.e. the size in the axial direction of the camshaft 2) is installed on the camshaft 2, the position of the second locking member 3 in the axial direction of the camshaft 2 can be adjusted to make the stop portion 31 of the second locking member 3 stop outside the CVVT mechanism 4, so as to limit the CVVT mechanism 4 from being separated from the camshaft 2, and the adaptability of the tool for the engine timing system of the present disclosure is improved.

[0032] According to the exemplary embodiments of the present disclosure, referring to Figures 1 to 4 As shown in FIG. 1, the adjusting structure 100 can include a mounting hole 102, a strip-shaped slot 30, and a fastener (not shown in the figure), the mounting hole 102 is arranged on one of the first locking member 1 and the second locking member 3, the strip-shaped slot 30 is arranged on the other one of the first locking member 1 and the second locking member 3, the strip-shaped slot 30 extends along the axial direction of the camshaft 2, and the fastener is arranged in the strip-shaped slot 30 and connected to the mounting hole 102. Through the above arrangement, when it is necessary to adjust the position of the first locking member 1 and the second locking member 3 in the axial direction of the camshaft 2, the position of the mounting hole 102 relative to the strip-shaped slot 30 can be adjusted, that is, the mounting hole 102 and the strip-shaped slot 30 are connected at the corresponding position in the axial direction of the camshaft 2 through the fastener, so as to adjust the position of the second locking member 3 relative to the first locking member 1 in the axial direction of the camshaft 2, which is convenient to operate and has good adaptability.

[0033] According to the exemplary embodiments of the present disclosure, referring to Figures 1 to 3 As shown in FIG. 1, the stop portion 31 can be configured as a stop plate, the stop plate is arranged perpendicular to the axis of the camshaft 2, and the stop plate is used to abut against the CVVT mechanism 4. Through such an arrangement, the stop plate can reliably abut against the CVVT mechanism 4, so as to avoid the CVVT mechanism 4 from being separated from the camshaft 2, and in addition, since the stop plate abuts against the CVVT mechanism 4, the CVVT mechanism 4 is in a relatively fixed state, so as to avoid the CVVT mechanism 4 from being deviated in position during the process of disassembling and assembling the center pin 5, which is beneficial to ensure that the CVVT mechanism 4 is concentric with the camshaft 2 and the center pin 5, and avoid the hard friction caused by the eccentricity of the CVVT mechanism 4 and the center pin 5, so as to avoid the CVVT mechanism 4 from being stuck due to the hard friction, and make the engine timing system operate normally.

[0034] According to the exemplary embodiments of the present disclosure, referring to Figure 1 and Figure 4As shown in the figures, the stop plate can be formed with a relief groove 311 for the center pin 5 to pass through and expose the center pin 5 to the relief groove 311, wherein the center pin 5 is connected with the camshaft 2 and used to lock the CVVT mechanism 4 on the camshaft 2. By setting the relief groove 311 to expose the center pin 5 to the relief groove 311, it is convenient to remove the center pin 5, and in addition, the lower end of the stop plate can be extended below the center pin 5 through the relief groove 311 to increase the abutting area between the stop plate and the CVVT mechanism 4, which is beneficial to improve the reliability of the stop plate limiting the CVVT mechanism 4.

[0035] According to the exemplary embodiments of the present disclosure, with reference to Figure 1 and Figure 5 As shown in the figures, the engine includes an outer end cover 6 for shielding the CVVT mechanism 4, and a preset gap 20 can be formed between the outer end cover 6 and the CVVT mechanism 4, and the stop portion 31 is arranged in the preset gap 20 and abuts against the CVVT mechanism 4. In the above technical solution, the stop portion 31 is arranged in the preset gap 20 and abuts against the CVVT mechanism 4, which can be understood as that the stop portion 31 can extend into the preset gap 20, so that the stop portion 31 can extend into the preset gap 20 and abut against the CVVT mechanism 4 to limit the CVVT mechanism 4 without removing the outer end cover 6, avoiding the oil flowing out due to the removal of the outer end cover 6 and other components, such as the timing chain, which can cause pollution to the engine and the whole vehicle, and avoid unnecessary waste of oil, and in addition, since the tool for the engine timing system of the present disclosure can directly limit the CVVT mechanism 4 without removing the outer end cover 6, it avoids the trouble caused by removing the outer end cover 6, which is beneficial to improve the maintenance and repair.

[0036] According to the exemplary embodiments of the present disclosure, with reference to Figure 1 and Figure 4 As shown in the figures, the second locking member 3 can be configured as an L-shaped structure, and includes a connecting plate 32 and a stop plate perpendicular to each other, and the connecting plate 32 is detachably connected with the first locking member 1. The L-shaped structure is convenient for the connecting plate 32 to be connected in place, that is, the connecting plate 32 is connected in place with the first locking member 1, and in addition, the L-shaped structure can make the stop plate perpendicular to the axis of the camshaft 2 and abut against the CVVT mechanism 4, and the L-shaped structure can be integrally formed, which is convenient for processing.

[0037] According to an exemplary embodiment of this disclosure, the number of slots 101 and the second locking member 3 is the same, and the number of slots 101 is at least two, with a predetermined distance between the two slots 101 in the radial direction of the camshaft 2. The engine may have at least two camshafts 2, with at least two camshafts 2 respectively used for intake camshaft 2 and exhaust camshaft 2. A CVVT mechanism 4 may be mounted on both the intake camshaft 2 and the exhaust camshaft 2. The two slots 101 are respectively used to engage with the intake camshaft 2 and the exhaust camshaft 2. (Refer to...) Figure 5 As shown, both camshafts 2 (intake camshaft 2 and exhaust camshaft 2) have a snap-fit ​​portion 21. The snap-fit ​​groove 101 can be constructed to match the contour of the snap-fit ​​portion 21 to ensure the reliability of the snap-fit ​​between the snap-fit ​​groove 101 and the camshaft 2.

[0038] According to exemplary embodiments of this disclosure, referring to Figures 1 to 3 As shown, the first locking member 1 may include a first plate 11 and a second plate 12 connected vertically. The first plate 11 is detachably connected to the camshaft bearing cover 10, and the second plate 12 has a slot 101 formed therein. The first plate 11 is located between two adjacent slots 101. With the above arrangement, a connecting hole can be provided on the first plate 11, and a fixing hole 103 can be provided on the camshaft bearing cover 100. Fasteners are passed through the connecting hole and fixed in the fixing hole 103 to fix the first locking member 1 to the camshaft bearing cover 10. In this way, it is not necessary to provide a connecting hole on the second plate 12, which helps to reduce the thickness of the second plate 12, that is, to reduce the axial dimension of the second plate 12 on the camshaft 2, making it easier to place the second plate 12 at the corresponding part of the camshaft 2 for smooth engagement with the camshaft 2.

[0039] According to exemplary embodiments of this disclosure, referring to Figures 1 to 3 As shown, the second plate 12 has a fixing part 13 on the end away from the slot 101. The fixing part 13 is constructed as a nut, which is welded to the second part. The second locking member 3 is connected to the first locking member 1 through the nut. Providing the fixing part 13 on the end of the second plate 12 away from the slot 101 helps to reduce the thickness of the end of the second plate 12 with the slot 101, that is, to reduce the dimension of the end of the second plate 12 with the slot 101 in the axial direction of the camshaft 2. This facilitates the smooth placement of the second plate 12 in the position to engage with the camshaft 2, so that the slot 101 can be smoothly engaged with the engaging part 21, improving the convenience of operation.

[0040] In the present disclosure, the fixing portion 13 is configured as a nut, and the nut is welded to the second portion, which improves the convenience and structural strength of the first locking piece 1 and facilitates flexible arrangement according to the number of camshafts 2 and the spacing between the camshafts 2. In addition, the number of strip-shaped slots 30 on each second locking piece 3 can be set to two or more to ensure the reliability of the connection between the second locking piece 3 and the first locking piece 1. Based on this, the number of nuts on the first locking piece 1 can be arranged according to the number of second locking pieces 3 and the number of strip-shaped slots 30 on each second locking piece 3.

[0041] Reference Figures 1 to 5 The use process of the embodiment of the present disclosure is described in detail as follows:

[0042] The first locking piece 1 is placed on the camshaft bushing cover 10, and the two clamping grooves 101 are clamped on the two camshafts 2, respectively, to limit the rotation of the two camshafts 2. In order to improve the stability of the fixation of the first locking piece 1 and the camshafts 2, the first plate 11 is connected to the camshaft bushing cover 10 by means of a fastener (i.e., the fastener is connected through the connecting hole and the fixing hole 103) to fix the first locking piece 1. On this basis, the stop portion 31 of the second locking piece 3 is inserted into the pre-set gap 20, and the center pin 5 is exposed to the avoidance groove 311. Then, the second locking piece 3 is moved along the axial direction of the camshaft 2, so that the stop portion 31 of the second locking piece 3 abuts against the CVVT mechanism 4. After that, the fastener is connected through the strip-shaped slot 30 and connected to the mounting hole 102 to connect the second locking piece 3 to the first locking piece 1. At this time, the camshafts 2, the first locking piece 1, the second locking piece 3, and the CVVT mechanism 4 are all in a fixed state. At this time, the maintenance personnel can disassemble and replace the center pin 5 exposed to the avoidance groove 311, so that the positions of the camshafts 2 and the CVVT mechanism 4 do not change before and after the center pin 5 is disassembled and replaced, thereby avoiding the problem of engine damage caused by secondary tooth jumping. The operation is easy, and the convenience of disassembling and replacing the center pin 5 is improved.

[0043] The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept range of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection range of the present disclosure.

[0044] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not describe various possible combinations again.

[0045] Furthermore, the various embodiments of the present disclosure can be arbitrarily combined with each other unless they contradict each other, and it should be understood that the same should be construed as being included in the disclosure of the present disclosure.

Claims

1. A tooling for an engine timing system, characterized in that, include: A first locking element is used for detachable connection with the camshaft bearing cover, and the first locking element has a slot for locking the camshaft. A second locking member is connected to the first locking member and has a stop portion for stopping on the outside of the CVVT mechanism to prevent the CVVT mechanism from disengaging from the camshaft.

2. The tooling for an engine timing system according to claim 1, characterized in that, An adjustment structure is connected between the second locking member and the first locking member, the adjustment structure being used to make the position of the second locking member relative to the first locking member axially adjustable on the camshaft.

3. The tooling for an engine timing system according to claim 2, characterized in that, The adjustment structure includes a mounting hole, a slot, and a fastener. One of the first locking member and the second locking member is provided with the mounting hole, and the other of the first locking member and the second locking member is provided with the slot. The slot extends along the axial direction of the camshaft, and the fastener passes through the slot and is connected to the mounting hole.

4. The tooling for an engine timing system according to claim 1, characterized in that, The stop portion is configured as a stop plate, which is arranged perpendicular to the axis of the camshaft and is used to abut against the CVVT mechanism.

5. The tooling for an engine timing system according to claim 4, characterized in that, The stop plate has a clearance groove for the center bolt to pass through and expose the center bolt in the clearance groove, wherein the center bolt is connected to the camshaft and is used to lock the CVVT mechanism onto the camshaft.

6. The tooling for an engine timing system according to claim 4, characterized in that, The engine includes an outer end cover for shielding the CVVT mechanism, a preset gap is formed between the outer end cover and the CVVT mechanism, and a stop portion is disposed in the preset gap and abuts against the CVVT mechanism.

7. The tooling for an engine timing system according to claim 4, characterized in that, The second locking member is constructed in an L-shape and includes a perpendicular connecting plate and the stop plate, wherein the connecting plate is detachably connected to the first locking member.

8. The tooling for an engine timing system according to claim 7, characterized in that, The number of the slots and the second locking member are the same, and the number of the slots is at least two, with a preset distance between the two slots in the radial direction of the camshaft.

9. The tooling for an engine timing system according to claim 8, characterized in that, The first locking element includes a first plate and a second plate that are vertically connected. The first plate is detachably connected to the camshaft bearing cover, and the second plate has the slots formed thereon. The first plate is located between two adjacent slots.

10. The tooling for an engine timing system according to claim 9, characterized in that, The second plate has a fixing part on the end away from the slot. The fixing part is constructed as a nut. The nut is welded to the second plate. The second locking member is connected to the first locking member through the nut.

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