Camshaft timing chain wheel
By setting weight-reducing holes and supporting liners on the camshaft timing sprocket, and combining them with annular reinforcing ribs, the problem of easy sprocket breakage was solved, achieving a balance between lightweight and high torsional resistance, thus meeting the power transmission requirements of the engine.
Patent Information
- Application Number
- CN202520367415.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-04
AI Technical Summary
The existing camshaft timing sprocket is prone to breakage in the engine, and increasing its thickness to enhance torsional resistance will increase weight, which is not conducive to lightweight automotive design.
A camshaft timing sprocket is designed to improve torsional resistance while maintaining lightweight by setting circular and waist-shaped weight-reducing holes on the sprocket base, adding a support liner, and combining multiple annular reinforcing ribs and connecting ribs.
This technology achieves the goal of improving the torsional resistance and overall strength of the sprocket while reducing weight, meeting the power transmission requirements of the engine and supporting lightweight automotive design.
Smart Images
Figure CN223894222U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sprocket technology, specifically a camshaft timing sprocket. Background Technology
[0002] Lightweighting of automobiles aims to reduce the vehicle's curb weight as much as possible while ensuring its strength and safety performance, thereby improving its power, reducing fuel consumption, and reducing exhaust pollution. Lightweight design of automobiles has become an important design topic. Lightweight design of automobiles is not only about structural simplification, but also about the new lightweight design of various parts. The timing sprocket is an important component of the engine valve train system.
[0003] This application improves upon existing technology. In existing technology, during engine operation, the connection between the crankshaft and camshaft is achieved through the timing system. The camshaft timing sprocket in the engine plays a crucial role in the precise power transmission of the timing wheel system. Since the camshaft timing sprocket is usually only a few millimeters thick and has to withstand a large torque during operation, the sprocket is prone to breakage and damage. Therefore, the overall thickness of the sprocket is usually increased to increase its torsional resistance. However, increasing the overall thickness of the sprocket will increase its weight, which is not conducive to the lightweight design of automobiles.
[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content
[0005] The purpose of this invention is to provide a camshaft timing sprocket to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a camshaft timing sprocket, comprising a sprocket base, chain teeth fixedly disposed on the outer peripheral wall of the sprocket base, a central circular hole being formed at the center of the sprocket base, a plurality of circular weight-reducing holes being disposed on the outer side of the central circular hole, a plurality of waist-shaped weight-reducing holes being disposed on the outer side of the circular weight-reducing holes, a plurality of interconnected mounting grooves being formed on the circular weight-reducing holes, mounting blocks being movably disposed inside the mounting grooves, fixing bolts being threaded through the surface of the mounting blocks, and supporting liners being fixedly connected between the mounting blocks, with the supporting liners fitted inside the circular weight-reducing holes.
[0007] As a further embodiment of this utility model: a second annular reinforcing rib is fixedly connected to the front end face of the sprocket base, and a first annular reinforcing rib is provided on the outer side of the second annular reinforcing rib.
[0008] As a further aspect of this utility model: a plurality of first connecting ribs are provided between the first annular reinforcing rib and the second annular reinforcing rib, and the number of first connecting ribs is not less than nine.
[0009] As a further embodiment of this utility model: a third annular reinforcing rib is fixedly connected to the rear end face of the sprocket base, and a fourth annular reinforcing rib is provided on the outer side of the third annular reinforcing rib.
[0010] As a further embodiment of this utility model: a plurality of second connecting ribs are provided between the third annular reinforcing rib and the fourth annular reinforcing rib, and the number of second connecting ribs is not less than nine.
[0011] As a further embodiment of this utility model: the number of circular weight-reducing holes is not less than three, and the number of waist-shaped weight-reducing holes is not less than nine.
[0012] This utility model has the following beneficial effects:
[0013] (1) Through the structural design of sprocket base, circular weight reduction hole, fourth annular reinforcing rib, mounting groove, mounting block and support liner, the weight of the sprocket can be reduced by setting multiple circular weight reduction holes and waist-shaped weight reduction holes on the sprocket base. At the same time, the inner wall of the circular weight reduction hole can be supported by the cooperation of multiple support liners, thereby improving the torsional resistance of the sprocket. This solves the problem that during engine operation, the connection between the crankshaft and camshaft is completed through the timing system. The camshaft timing sprocket in the engine plays a crucial role in the precise power transmission of the timing wheel system. Since the camshaft timing sprocket is usually only a few millimeters thick and has to withstand a large torque during operation, the sprocket is easily broken and damaged. Therefore, the overall thickness of the sprocket is usually increased to increase the torsional resistance of the sprocket. However, if the overall thickness of the sprocket is increased, the weight of the sprocket will increase, which is not conducive to the lightweight design of automobiles.
[0014] (2) Through the structural design of the first annular reinforcing rib, the first connecting rib, the second annular reinforcing rib, the third annular reinforcing rib, the fourth annular reinforcing rib and the second connecting rib, the overall strength of the sprocket can be strengthened, thereby improving the torsional resistance of the sprocket. The first annular reinforcing rib, the first connecting rib, the second annular reinforcing rib, the third annular reinforcing rib, the fourth annular reinforcing rib and the second connecting rib are located on the front and back sides of the sprocket base, respectively, which can achieve comprehensive reinforcement and further improve the torsional resistance of the sprocket. Attached Figure Description
[0015] Figure 1 This is a partial three-dimensional schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a partial side view of the structure of this utility model;
[0017] Figure 3 This is a schematic diagram of a partial rear view of the present invention;
[0018] Figure 4 This is a partial structural diagram of the supporting lining, which is the main feature of this utility model.
[0019] In the diagram: 1. Sprocket base; 2. Sprocket teeth; 3. First annular reinforcing rib; 4. First connecting rib; 5. Second annular reinforcing rib; 6. Central circular hole; 7. Circular weight-reducing hole; 8. Third annular reinforcing rib; 9. Fourth annular reinforcing rib; 10. Second connecting rib; 11. Mounting groove; 12. Mounting block; 13. Fixing bolt; 14. Support liner; 15. Waist-shaped weight-reducing hole. Detailed Implementation
[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.
[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0022] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] Please see Figure 1-4 An embodiment of this utility model provides: a camshaft timing sprocket, including a sprocket base 1, chain teeth 2 fixedly disposed on the outer peripheral wall of the sprocket base 1, a central circular hole 6 opened at the center of the sprocket base 1, a plurality of circular weight reduction holes 7 disposed on the outer side of the central circular hole 6, a plurality of waist-shaped weight reduction holes 15 disposed on the outer side of the circular weight reduction holes 7, a plurality of interconnected mounting grooves 11 opened on the circular weight reduction holes 7, mounting blocks 12 movably disposed inside the mounting grooves 11, fixing bolts 13 threaded through the surface of the mounting blocks 12, and a support liner 14 fixedly connected between the mounting blocks 12, and the support liner 14 sleeved inside the circular weight reduction holes 7;
[0026] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, in use, the weight of the sprocket can be reduced by setting multiple circular weight-reducing holes 7 and waist-shaped weight-reducing holes 15 on the sprocket base 1. Simultaneously, the cooperation of multiple support liners 14 can support the inner wall of the circular weight-reducing holes 7, thereby improving the sprocket's torsional resistance. Furthermore, if the support liner 14 breaks, it can be removed from the mounting block 12 by rotating the fixing bolt 13, and then the support liner 14 can be moved until it detaches from the circular weight-reducing holes 7, thus completing the disassembly of the support liner 14. Similarly, the support liner 14 can be installed, facilitating easy... The support liner 14 can be disassembled and reassembled, which can effectively ensure its support effect. It solves the problem that during the operation of the engine, the connection between the crankshaft and camshaft is completed through the timing system. The camshaft timing sprocket in the engine plays a crucial role in the precise power transmission of the timing wheel system. Since the camshaft timing sprocket is usually only a few millimeters thick and has to withstand a lot of torque when it is working, the sprocket is easy to break and be damaged. Therefore, the overall thickness of the sprocket is usually increased to increase the torsional resistance of the sprocket. However, if the overall thickness of the sprocket is increased, the weight of the sprocket will also increase, which is not conducive to the lightweight design of the car.
[0027] The front end face of the sprocket base 1 is fixedly connected to a second annular reinforcing rib 5. A first annular reinforcing rib 3 is provided on the outside of the second annular reinforcing rib 5. A plurality of first connecting ribs 4 are provided between the first annular reinforcing rib 3 and the second annular reinforcing rib 5, and the number of first connecting ribs 4 is not less than nine. The rear end face of the sprocket base 1 is fixedly connected to a third annular reinforcing rib 8. A fourth annular reinforcing rib 9 is provided on the outside of the third annular reinforcing rib 8. A plurality of second connecting ribs 10 are provided between the third annular reinforcing rib 8 and the fourth annular reinforcing rib 9, and the number of second connecting ribs 10 is not less than nine. The number of circular weight-reducing holes 7 is not less than three, and the number of waist-shaped weight-reducing holes 15 is not less than nine.
[0028] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, in use, the overall strength of the sprocket can be enhanced by the cooperation of the first annular reinforcing rib 3, the first connecting rib 4, the second annular reinforcing rib 5, the third annular reinforcing rib 8, the fourth annular reinforcing rib 9, and the second connecting rib 10, thereby improving the torsional resistance of the sprocket. Furthermore, the first annular reinforcing rib 3, the first connecting rib 4, the second annular reinforcing rib 5, the third annular reinforcing rib 8, the fourth annular reinforcing rib 9, and the second connecting rib 10 are located on the front and back sides of the sprocket base 1, respectively, which can achieve comprehensive reinforcement and further improve the torsional resistance of the sprocket.
[0029] Working Principle: In this application, by setting multiple circular weight-reducing holes 7 and oblong weight-reducing holes 15 on the sprocket base 1, the weight of the sprocket can be reduced. Simultaneously, the cooperation of multiple supporting liners 14 can support the inner wall of the circular weight-reducing holes 7, thereby improving the sprocket's torsional resistance. Furthermore, when the supporting liner 14 breaks, the fixing bolt 13 can be removed from the mounting block 12 by rotating it. Then, the supporting liner 14 can be moved until it detaches from the circular weight-reducing hole 7, thus completing the disassembly of the supporting liner 14. Similarly, the installation of the supporting liner 14 can be completed. The support liner 14 is easy to disassemble and assemble, which can effectively ensure its support effect. Secondly, by utilizing the cooperation of the first annular reinforcing rib 3, the first connecting rib 4, the second annular reinforcing rib 5, the third annular reinforcing rib 8, the fourth annular reinforcing rib 9, and the second connecting rib 10, the overall strength of the sprocket can be strengthened, thereby improving the torsional resistance of the sprocket. Moreover, the first annular reinforcing rib 3, the first connecting rib 4, the second annular reinforcing rib 5, the third annular reinforcing rib 8, the fourth annular reinforcing rib 9, and the second connecting rib 10 are located on the front and back sides of the sprocket base 1, respectively, which can achieve comprehensive reinforcement and further improve the torsional resistance of the sprocket.
[0030] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. At the same time, the electrical components mentioned in this application are all connected to an external power supply and control switch when in use. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Therefore, this utility model will not explain the control method and circuit connection in detail. Moreover, the external controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and the external controller is a conventional known device.
[0031] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0032] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above are only preferred embodiments of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.
Claims
1. A camshaft timing sprocket, comprising a sprocket base (1), characterized in that: Chain teeth (2) are fixedly provided on the outer peripheral wall of the sprocket base (1). A central circular hole (6) is provided at the center of the sprocket base (1). Multiple circular weight-reducing holes (7) are provided on the outer side of the central circular hole (6). Multiple waist-shaped weight-reducing holes (15) are provided on the outer side of the circular weight-reducing holes (7). Multiple interconnected mounting grooves (11) are provided on the circular weight-reducing holes (7). Mounting blocks (12) are movably provided inside the mounting grooves (11). Fixing bolts (13) are threaded through the surface of the mounting blocks (12). Supporting liners (14) are fixedly connected between the mounting blocks (12), and the supporting liners (14) are fitted inside the circular weight-reducing holes (7).
2. The camshaft timing sprocket according to claim 1, characterized in that: The front end face of the sprocket base (1) is fixedly connected to a second annular reinforcing rib (5), and a first annular reinforcing rib (3) is provided on the outer side of the second annular reinforcing rib (5).
3. A camshaft timing sprocket according to claim 2, characterized in that: A plurality of first connecting ribs (4) are provided between the first annular reinforcing rib (3) and the second annular reinforcing rib (5), and the number of first connecting ribs (4) is not less than nine.
4. A camshaft timing sprocket according to claim 1, characterized in that: The rear end face of the sprocket base (1) is fixedly connected to a third annular reinforcing rib (8), and a fourth annular reinforcing rib (9) is provided on the outer side of the third annular reinforcing rib (8).
5. A camshaft timing sprocket according to claim 4, characterized in that: A plurality of second connecting ribs (10) are provided between the third annular reinforcing rib (8) and the fourth annular reinforcing rib (9), and the number of second connecting ribs (10) is not less than nine.
6. A camshaft timing sprocket according to claim 1, characterized in that: The number of circular weight-reducing holes (7) is not less than three, and the number of waist-shaped weight-reducing holes (15) is not less than nine.