Diesel engine timing system transmission structure with oil-resistant belt and diesel engine

Abstract

The utility model discloses a diesel engine timing system transmission structure with an oil-resistant belt and a diesel engine. The diesel engine timing system transmission structure comprises a driving wheel. The driving wheel comprises a driving wheel and a driving gear coaxial with the driving wheel; the air compressor gear and the crankshaft gear are meshed with the driving gear, the idle gear is meshed with the crankshaft gear, and the fuel pump gear and the oil pump gear are meshed with the idle gear. The timing oil-resistant belt is used for realizing transmission of the driving wheel and the driven wheel; and the tensioner is used for tensioning the timing oil-resistant belt. The wet type timing oil-resistant belt is adopted to achieve transmission, and noise, friction loss, weight, transmission efficiency, oil consumption, emission and the like are obviously improved.

Description

Technical Field

[0001] This utility model relates to the technical field of diesel engine transmission structure, and in particular to a transmission structure with an oil-resistant belt for a diesel engine timing system and a diesel engine. Background Technology

[0002] In the field of diesel engines, the traditional timing system transmission methods of diesel engines are divided into gear transmission, chain transmission and dry belt transmission. Gear transmission, chain transmission and dry belt transmission all have certain shortcomings in terms of noise, friction loss, weight, transmission efficiency, fuel consumption and emissions. These shortcomings more or less affect the performance of the engine. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a transmission structure for a diesel engine timing system with an oil-resistant belt and a diesel engine.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] The first aspect of this utility model provides a transmission structure for a diesel engine timing system with an oil-resistant belt, including a drive pulley; the drive pulley includes a driving wheel and a driving gear coaxial with the driving wheel, and further includes an air compressor gear and a crankshaft gear, both meshing with the driving gear, an idler gear meshing with the crankshaft gear, a fuel pump gear and an oil pump gear meshing with the idler gear, a driven pulley, a timing oil-resistant belt for realizing the transmission between the driving wheel and the driven pulley, and a tensioner for tensioning the timing oil-resistant belt.

[0006] The second aspect of this utility model provides a diesel engine, including the transmission structure of the diesel engine timing system with an oil-resistant belt as described in the first aspect.

[0007] This utility model has the following advantages:

[0008] This solution uses a wet timing oil-resistant belt for transmission, which significantly improves noise, friction loss, weight, transmission efficiency, fuel consumption, and emissions. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the transmission structure of the diesel engine timing system with an oil-resistant belt according to this utility model;

[0011] Figure 2 This is a schematic diagram illustrating the application of the transmission structure of the timing system of a diesel engine with an oil-resistant belt according to this utility model. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0013] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0014] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0015] 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.

[0016] In the description of this utility model, 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 of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model 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 this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] 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.

[0018] To address the problems of noise, friction loss, weight, transmission efficiency, fuel consumption, and emissions associated with existing traditional gear drives, chain drives, and dry belt drives, this utility model discloses, in its first aspect, a transmission structure for a diesel engine timing system with an oil-resistant belt. For example... Figure 1 As shown, the transmission structure includes a drive wheel 4, a gear train consisting of an air compressor gear 5, a crankshaft gear 6, a fuel pump gear 7, an idler gear 8, an oil pump gear 9, a tensioner 2, a timing oil-resistant belt 1, and a driven wheel 3. The drive wheel includes a drive wheel and a drive gear coaxial with and integral with the drive wheel. The air compressor gear 5 and the crankshaft gear 6 in the gear train mesh with the drive gear. The idler gear 8 meshes with the crankshaft gear 6. The fuel pump gear 7 and the oil pump gear 9 mesh with the idler gear 8. The timing oil-resistant belt 1 enables transmission between the drive wheel and the driven wheel 3. The tensioner 2 is used to tension the timing oil-resistant belt 1.

[0019] There can be one or two driven wheels 3. When there are two driven wheels 3, they are placed together with the driving wheel 4 at one end of the engine.

[0020] With the above structure, the timing oil-resistant belt 1, tensioner 2, drive wheel 4, and two driven wheels 3 should have their design life determined in the early design stage to ensure that the components can operate normally and efficiently, and to avoid problems such as the timing system failing to work properly due to individual components exceeding their own lifespan.

[0021] Using the above structure, the design process first requires determining parameters such as engine power, speed, timing ratio, camshaft torque, crankshaft excitation, oil temperature, oil grade, design life, and operating boundaries. Then, these parameters are used to determine the timing oil belt pitch, material, and tooth profile. Finally, the parameter model of the timing oil belt is obtained through simulation calculation. After the model is verified and confirmed, prototype manufacturing, bench testing, and durability testing are carried out.

[0022] On the other hand, there are also strict requirements for the design of the pulleys. Preferably, there are two driven pulleys 3. At this time, the timing oil-resistant belt 1 will produce axial movement under normal operating conditions. Therefore, it is preferred that all pulleys in the same timing oil-resistant belt system have flanges, that is, at least one inner flange and one outer flange.

[0023] In the first structure, when there are front and rear double retaining edges on the same pulley, that is, both sides of the drive wheel have retaining edges, and / or both sides of the driven wheel 3 have retaining edges, the width of the drive wheel pulley is the width of the timing oil-resistant belt 1 * 1.05 + 1.2 mm; and / or, the width of the drive wheel pulley is the width of the timing oil-resistant belt 1 * 1.05 + 1.2 mm.

[0024] In the second structure, when there is a flange on one side of the same pulley, that is, the drive wheel has a flange on only one side, and / or the driven wheel 3 has a flange on only one side, the width of the drive wheel pulley is the width of the timing oil-resistant belt 1 * 1.05 + 3 mm; and / or, the width of the driven wheel 3 pulley is the width of the timing oil-resistant belt 1 * 1.05 + 3 mm.

[0025] If the drive wheel has no flange and the driven wheel 3 has no flange, then the width of the pulleys of the drive wheel and the driven wheel 3 is the width of the timing oil-resistant belt 1 * 1.05 + 5 mm.

[0026] The above structure ensures that the belt can operate normally and smoothly even when axial movement occurs.

[0027] During assembly, if the air compressor gear 5, crankshaft gear 6, fuel pump gear 7, idler gear 8, oil pump gear 9, and oil-resistant belt 1 are on the same side of the engine, then... Figure 2 Then, after fixing the camshaft with a timing fixture, install the gear train, then put the timing oil-resistant belt onto the drive pulley and driven pulley in sequence, then pre-tension it with a tensioner, and finally remove the tensioner pin after checking that everything is correct.

[0028] Based on any of the above structures, the second aspect of this utility model discloses a diesel engine, such as... Figure 2 As shown, a transmission structure with an oil-resistant belt for a diesel engine timing system is described in the first aspect and any of its possibilities.

[0029] By adopting the above structure, the application of timing oil-resistant belts can improve problems such as timing noise, high friction loss, and low transmission efficiency, and can effectively reduce after-sales costs. On the other hand, the timing oil-resistant belt structure only includes a belt, pulleys, and tensioner, which is simple in structure and involves fewer parts, thus reducing the production cost of parts to a certain extent.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A transmission structure for a diesel engine timing system with an oil-resistant belt, comprising a drive pulley (4); characterized in that: The driving wheel includes a drive wheel and a drive gear coaxial with the drive wheel, and also includes an air compressor gear (5) and a crankshaft gear (6) in a gear system that meshes with the drive gear, an idler gear (8) that meshes with the crankshaft gear (6), a fuel pump gear (7) and an oil pump gear (9) that mesh with the idler gear (8), a driven wheel (3), a timing oil-resistant belt (1) that realizes the transmission between the drive wheel and the driven wheel (3), and a tensioner (2) for tensioning the timing oil-resistant belt (1).

2. The transmission structure of a diesel engine timing system with an oil-resistant belt according to claim 1, characterized in that: There are two driven wheels (3).

3. The transmission structure of a diesel engine timing system with an oil-resistant belt according to claim 2, characterized in that: Both sides of the drive wheel have flanges, and the width of the drive wheel pulley is the width of the timing oil-resistant belt (1) * 1.05 + 1.2 mm; and / or, The driven wheel (3) has flanges on both sides, and the width of the driven wheel (3) is the width of the timing oil-resistant belt (1) * 1.05 + 1.2 mm.

4. The transmission structure of a diesel engine timing system with an oil-resistant belt according to claim 2, characterized in that: The drive wheel has a flange on only one side, and the width of the drive wheel pulley is the width of the timing oil-resistant belt (1) * 1.05 + 3 mm; and / or, The driven pulley (3) has a flange on only one side, and the pulley width of the driven pulley (3) is the width of the timing oil-resistant belt (1) * 1.05 + 3 mm.

5. The transmission structure of a diesel engine timing system with an oil-resistant belt according to claim 1, characterized in that: The drive wheel has no flange and the driven wheel (3) has no flange. The width of the pulleys of the drive wheel and the driven wheel (3) is the width of the timing oil-resistant belt (1) * 1.05 + 5 mm.

6. A diesel engine, characterized in that: The transmission structure of a diesel engine timing system with an oil-resistant belt, as described in any one of claims 1 to 5.

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