Engine timing chain guide rail and engine

Abstract

The utility model provides an engine timing chain guide rail and an engine, the engine timing chain guide rail is matched with a hydraulic tensioner and a chain for use, the engine timing chain guide rail comprises a guide rail framework, a guide rail piece and a tensioner gasket, and a plurality of hollow parts are distributed on two opposite sides of the guide rail framework at intervals. The two opposite sides of the guide rail framework are concaved inwards to form a plurality of grooves, the positions of the grooves in the same side and the positions of the grooves in the different sides are staggered, a first installation hole is formed in one end of the guide rail framework, a clamping groove is formed in the end, facing the first installation hole, of the guide rail framework, and a plurality of protruding parts are arranged on the two opposite sides of the guide rail part. A buckle is arranged at one end of the guide rail piece, a chain is arranged on the top face of the guide rail piece, the tensioner gasket is arranged at the end, away from the first mounting hole, of the guide rail framework, the hydraulic tensioner abuts against the tensioner gasket, the acting force arm of the guide rail framework is the longest, and the adjusting efficiency of the hydraulic tensioner is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile engine chains, in particular to an engine timing chain guide rail and an engine. Background Technique

[0002] The timing sprocket chain system is a very important component in the engine. Among them, the chain needs to be able to achieve stable and durable high-speed operation, which is closely related to the function of the chain guide rail. The chain guide rail cooperates with the chain tensioner to provide a stable tension for the chain, preventing the chain from skipping teeth or being too tight, which may cause the chain to wear out quickly.

[0003] At present, there are mainly two structures of tensioning guide rails. One is that the entire guide rail skeleton and the guide rail surface are all made of wear-resistant plastics such as PA66 or PA46. This kind of guide rail is light in weight, but its strength is insufficient, and the chain operation will be unstable after long-term operation. The other is that the skeleton is made of steel metal material, and the guide rail surface in contact with the chain is made of wear-resistant plastics such as PA66 or PA46. The guide rail surface is generally fixed on the metal skeleton through a clamping structure made. This kind of guide rail has sufficient strength, but it is heavy in weight, which affects the adjustment accuracy of the tensioner and has a high cost. Content of the Utility Model

[0004] In view of the above situation, it is necessary to provide an engine timing chain guide rail and an engine for the problems of the strength and adjustability of the chain guide rail in the prior art.

[0005] An engine timing chain guide rail is used in cooperation with a hydraulic tensioner and a chain. The engine timing chain guide rail includes a guide rail skeleton, a guide rail member and a tensioner gasket. Both the guide rail skeleton and the guide rail member are arc-shaped and have the same radian. A number of spaced-apart hollow parts are provided on both opposite sides of the guide rail skeleton. A number of grooves are recessed on both opposite sides of the guide rail skeleton. The positions of a number of the grooves on the same side are offset from the positions of a number of the grooves on the opposite side. The grooves are adjacent to the hollow parts. A first mounting hole is provided at one end of the guide rail skeleton, and the first mounting hole is used to fix the guide rail skeleton on the gear chamber. A card slot is provided at one end of the guide rail skeleton facing the first mounting hole, and the card slot is adjacent to the first mounting hole. A number of convex parts are provided on both opposite sides of the guide rail member, and the convex parts are adapted to the grooves. A buckle is provided at one end of the guide rail member, and the buckle is adapted to the card slot. The chain is provided on the top surface of the guide rail member. The tensioner gasket is provided at one end of the guide rail skeleton away from the first mounting hole, and the tensioner gasket is used to abut against the hydraulic tensioner to adjust the tension of the chain.

[0006] Advantages of the Utility Model

[0007] 1. The structure formed by the hollow parts on both sides of the guide rail skeleton reduces the self-weight of the guide rail skeleton and increases the strength while ensuring that the guide rail component is clamped to the guide rail skeleton.

[0008] 2. Both the guide rail skeleton and the guide rail component are arc-shaped, which can fit better when they are connected. The tensioner gasket is provided at one end of the guide rail skeleton. When the hydraulic tensioner abuts against the tensioner gasket, the force arm of the guide rail skeleton is the longest, making the force arm exerted by the guide rail component on the chain reach the maximum within a limited space, which is beneficial to the tensioning of the chain, makes full use of the tensioning force, and improves the adjustment efficiency of the hydraulic tensioner.

[0009] Further, a first through hole and a second mounting hole are provided at one end of the guide rail skeleton away from the first mounting hole. The second mounting hole is used to accommodate the tensioner gasket, and the first through hole is used for the fixed connection between the tensioner gasket and the guide rail skeleton.

[0010] Further, the cross-section of the guide rail skeleton is in the shape of an "I".

[0011] Further, the width of the guide rail skeleton is 17.4 mm to 17.8 mm, and the height of the guide rail skeleton is 23.2 mm to 23.6 mm.

[0012] Further, a limiting block is also provided on the guide rail component. The limiting block is adjacent to the buckle, and the limiting block is used to abut against the clamping groove.

[0013] Further, the radian of the guide rail skeleton is 89° to 91°.

[0014] Further, the material of the guide rail skeleton is aluminum.

[0015] Further, the material of the guide rail component is PA66 plastic or PA46 plastic.

[0016] The present utility model also provides an engine, including the engine timing chain guide rail described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the first embodiment of the present utility model;

[0018] Figure 2 is an exploded structural diagram of the first embodiment of the present utility model;

[0019] Figure 3 is Figure 1 the sectional view taken along A-A in

[0020] Figure 4 is an assembly and usage diagram of the present utility model with a hydraulic tensioner and a chain.

[0021] Explanation of the reference numerals: 1. guide rail frame; 11. hollow portion; 12. groove; 13. first mounting hole; 14. slot; 15. first through hole; 16. second mounting hole; 2. guide rail member; 21. convex portion; 22. buckle; 23. limit block; 3. tensioner gasket; 4. locking pin; 5. chain; 6. hydraulic tensioner; 61. tensioner pin. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The drawings provide embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing this embodiment is to make the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. In addition, the various embodiments of the present invention, the features in the embodiments, and the features of the embodiments can be freely combined without obvious conflicts or contradictions.

[0025] An engine timing chain guide rail is used in conjunction with a hydraulic tensioner 6 and a chain 5, such as Figure 1 and Figure 4 As shown, it includes a guide rail frame 1, a guide rail member 2 and a tensioner pad 3.

[0026] Specifically, Figures 1 to 4The guide rail frame 1 is arc-shaped and has a consistent curvature. The curvature of the guide rail frame 1 is 89° to 91°. The guide rail frame 1 is made of aluminum. The two opposite sides of the guide rail frame are provided with a plurality of hollow portions 11 distributed at intervals. The cross section of the guide rail frame 1 is I-shaped. The width of the guide rail frame 1 is 17.4 mm to 17.8 mm. The height of the guide rail frame 1 is 23.2 mm to 23.6 mm. The I-shaped structure not only reduces the weight of the guide rail frame 1, but also ensures the strength of the guide rail frame 1. A plurality of hollow portions 11 are formed along the two opposite sides of the guide rail frame 1. The grooves 12 are arranged so that the positions of the grooves 12 on the same side are staggered with the positions of the grooves 12 on the opposite side. The grooves 12 are adjacent to the hollow portion 11. The hollow portion 11 is arranged so that the deadweight of the guide rail frame 1 is reduced and the strength is increased while ensuring that the guide rail member 2 is clamped on the guide rail frame 1. A first mounting hole 13 is arranged at one end of the guide rail frame 1. The first mounting hole 13 is used to fix the guide rail frame 1 to the gear chamber. A card slot 14 is arranged at one end of the guide rail frame 1 facing the first mounting hole 13. A card slot 14 is arranged at one end of the guide rail frame 1 away from the first mounting hole 13. There are a first through hole 15 and a second mounting hole 16, the first through hole 15 is adjacent to the second mounting hole 16, the second mounting hole 16 is used to accommodate the tensioner pad 3, the first through hole 15 is used to fix the tensioner pad 3 to the guide rail frame 1, the guide rail parts 2 are arc-shaped and consistent with the curvature 1 of the guide rail frame, the material of the guide rail parts 2 is PA66 plastic or PA46 plastic, and a plurality of convex parts 21 are provided on the opposite sides of the guide rail parts 2, the convex parts 21 are adapted to the groove 12, and a buckle 22 and a limit block 23 are provided on one end of the guide rail part 2, and the buckle 22 is connected to the card slot 14 The adaptation, the limit block 23 is adjacent to the buckle 22, the limit block 23 is used to abut the slot 14, the top surface of the guide rail member 2 is provided with a chain 5, because the guide rail frame 1 and the guide rail member 2 are both arc-shaped, the two can fit better when connected, the tensioner pad 3 is arranged at one end of the guide rail frame 1, when the hydraulic tensioner 6 abuts against the tensioner pad 3, the force arm of the guide rail frame 1 is the longest, so that the force arm applied by the guide rail member 2 to the chain 5 reaches the maximum in a limited space, which is beneficial to the tensioning of the chain 5, fully utilizes the tensioning force, and improves the adjustment efficiency of the hydraulic tensioner 6.

[0027] like Figure 4 As shown, the mounting bolts (not shown) pass through the first mounting holes 9 to fix the guide rail frame 1 in the gear chamber. Since the mounting bolts are step bolts, the guide rail frame can rotate around the bolts after installation. Then the chain 5 is installed on the guide rail member. The chain 5 is connected to two camshaft sprockets (not shown) up and down. The hydraulic tensioner 6 is installed on the engine cylinder block. At the same time, the tensioner pin 61 is supported against the tensioner gasket 3 under the action of the hydraulic pressure inside the hydraulic tensioner 6 to apply tensioning force to the entire guide rail frame 1, and the guide rail member 2 is attached to and connected to the guide rail frame 1, so that the chain 5 installed on the guide rail member 1 is pressed, thereby realizing the tensioning function of adjusting the chain 5 through the guide rail frame 1.

[0028] The present utility model further provides an engine, which includes the above-mentioned engine timing chain guide rail.

[0029] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0030] The above-described embodiments only express the implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. An engine timing chain guide rail, used in conjunction with a hydraulic tensioner and a chain, characterized in that: The engine timing chain guide rail comprises a guide rail frame, a guide rail member and a tensioner pad. The guide rail frame and the guide rail member are both arc-shaped and have the same curvature. The two opposite sides of the guide rail frame are provided with a plurality of hollow parts distributed at intervals. The two opposite sides of the guide rail frame are concave to form a plurality of grooves. The positions of the plurality of grooves on the same side and the positions of the plurality of grooves on the opposite side are staggered. The grooves are adjacent to the hollow parts. A first mounting hole is provided at one end of the guide rail frame. The first mounting hole is used to fix the guide rail frame Fixed in the gear chamber, a slot is set on one end of the guide rail frame facing the first mounting hole, the slot is adjacent to the first mounting hole, a plurality of protrusions are set along the opposite sides of the guide rail member, the protrusions are matched with the grooves, a buckle is set at one end of the guide rail member, the buckle is matched with the slot, the chain is set on the top surface of the guide rail member, the tensioner gasket is set at one end of the guide rail frame away from the first mounting hole, and the tensioner gasket is used to abut the hydraulic tensioner to adjust the tensioning force of the chain.

2. The engine timing chain guide according to claim 1, characterized in that: A first through hole and a second mounting hole are provided at one end of the guide rail frame away from the first mounting hole. The second mounting hole is used to accommodate the tensioner pad, and the first through hole is used to fix the tensioner pad to the guide rail frame.

3. The engine timing chain guide according to claim 1, characterized in that: The cross section of the guide rail skeleton is I-shaped.

4. The engine timing chain guide according to claim 3, characterized in that: The width of the guide rail frame is 17.4 mm to 17.8 mm, and the height of the guide rail frame is 23.2 mm to 23.6 mm.

5. The engine timing chain guide according to claim 1, characterized in that: The guide rail member is also provided with a limit block, the limit block is adjacent to the buckle, and the limit block is used to abut against the slot.

6. The engine timing chain guide according to claim 1, characterized in that: The curvature of the guide rail skeleton is 89° to 91°.

7. The engine timing chain guide according to claim 1, characterized in that: The material of the guide rail frame is aluminum.

8. The engine timing chain guide according to claim 1, characterized in that: The material of the guide rail member is PA66 plastic or PA46 plastic.

9. An engine, characterized in that: It comprises an engine timing chain guide as claimed in any one of claims 1 to 8.

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