Synchronous belt for extended-range engine oil pump

Abstract

The synchronous belt comprises a main body unit, a tooth portion layer unit and a back portion layer unit, the main body unit comprises a first main body portion and a second main body portion, and the first main body portion and the second main body portion are arranged in a stacked mode. A tensile cord unit is arranged between the first main body part and the second main body part, the first main body part, the second main body part and the tensile cord unit extend in the same direction, and the tensile cord unit comprises a plurality of oil-resistant glass wire pieces. The first main body part and the second main body part are both made of a rubber material formed by mixing a hydrogenated nitrile butadiene layer and a fiber layer, the fiber length in the fiber layer ranges from 2 mm to 6.5 mm, and the second main body part is arranged close to the second side and protrudes outwards to form a tooth part. The cable at least has the following advantages: the cable has better oil resistance and tensile strength, higher temperature resistance coefficient and better friction coefficient.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to a synchronous belt used for an oil pump of a range-extending engine. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] With the gradual improvement of global environmental awareness and the intensification of the energy crisis, new energy vehicles, as an environmentally friendly, efficient and low-carbon means of transportation, have become an important development direction of the automobile industry. Among them, the extended-range vehicle, as a type of new energy vehicle, has a smooth output power, and the vehicle can bring users a smooth driving experience like a pure electric vehicle during the driving process. The extended-range engine directly drives the wheels, so the speed of the generator has no direct relationship with the wheel speed and the speed of the car. Through system optimization, the engine can always work in the optimal speed range. Even if charging is not possible, the fuel consumption is still relatively low when the engine is started. In addition, because the extended-range engine does not directly drive the wheels, it does not require a gearbox. It is equivalent to equipping an ordinary electric car with a gasoline generator. The structure is relatively simple and easy to maintain in the later stage.

[0004] At present, the range-extended engine mainly uses a chain system for transmission, which generates a lot of noise during operation, has a poor system friction coefficient, and is relatively poor in oil resistance, which poses a safety risk during use. Therefore, it is urgent to design a synchronous belt that is creamy and resistant to high temperatures and has a good safety factor.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the utility model and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the utility model. Utility Model Content

[0006] In order to overcome the defects in the prior art, the embodiment of the utility model provides a synchronous belt for an extended-range engine oil pump, which has good oil resistance and tensile strength, and has a higher temperature resistance coefficient and a better friction coefficient.

[0007] The embodiment of the present application discloses: a synchronous belt for an extended-range engine oil pump, comprising a main body unit, a tooth layer unit located on a first side of the main body unit, and a back layer unit located on a second side of the main body unit, wherein the first side and the second side of the main body unit are arranged back to back, the main body unit comprises a first main body portion and a second main body portion, the first main body portion and the second main body portion are arranged in a stacked manner, a tensile cord unit is arranged between the first main body portion and the second main body portion, the first main body portion, the second main body portion and the tensile cord unit extend in the same direction, the tensile cord unit comprises a plurality of oil-resistant glass wire members, the first main body portion and the second main body portion are both made of a rubber material formed by a mixture of a hydrogenated nitrile butadiene layer and a fiber layer, the fiber length in the fiber layer ranges from 2 to 6.5 mm, and the second main body portion is arranged close to the second side and protrudes outward to form a tooth portion.

[0008] Furthermore, the fiber layer is made of Sulon material.

[0009] Furthermore, the tooth layer unit and the back layer unit are both made of an aramid layer and a nylon layer by a blending process.

[0010] Furthermore, the surfaces of the tooth layer unit and the back layer unit are coated with an oil-resistant Teflon coating.

[0011] Furthermore, the fiber layer accounts for 0.01-0.06 of the total weight of the main unit.

[0012] Furthermore, a plurality of ridges are formed on the outer side surface of the back layer unit, and the shapes of the plurality of ridges can be one or more.

[0013] Furthermore, the convex ridges are in one or more of a quadrilateral shape, a trapezoidal shape, and a wavy shape.

[0014] With the help of the above technical scheme, the beneficial effects of the utility model are as follows: the synchronous belt in the present application is applied to the oil pump system of the extended-range engine, and the synchronous belt can be used in an oil environment, wherein the tensile cord unit has good oil resistance and good tensile strength, and can withstand large loads, especially sudden large loads, to ensure the service life of the synchronous belt; the main unit has a higher temperature resistance coefficient, and in a specific use environment, it can withstand a high temperature of 150°C, and the mixed rubber material has a better friction coefficient, which reduces friction loss while correspondingly reducing the noise of the system, specifically by 5 decibels.

[0015] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the synchronous belt in the embodiment of the utility model.

[0018] The figure numbers of the above drawings are: 1. first main body; 2. second main body; 3. tooth layer unit; 4. back layer unit; 5. tensile cord unit; 6. ridge. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0021] Combination Figure 1As shown, a synchronous belt for an extended-range engine oil pump is disclosed in an embodiment of the present application, including a main body unit, a tooth layer unit 3 and a back layer unit 4. The main body unit has a first side and a second side arranged opposite to each other, the tooth layer unit 3 is located on the first side of the main body unit, and the back layer unit 4 is located on the second side of the main body unit. The main body unit includes a first main body 1 and a second main body 2, and the first main body 1 and the second main body 2 are stacked. It is worth noting that a tensile cord unit 5 is arranged between the first main body 1 and the second main body 2, and the first main body 1, the second main body 2 and the tensile cord unit 5 all extend in the same direction. The tensile cord unit 5 includes a plurality of oil-resistant glass wire members, and the first main body 1 and the second main body 2 are both made of a rubber material formed by a mixture of a hydrogenated nitrile layer and a fiber layer. Through the above-mentioned setting method, the synchronous belt in the present application can be applied to the oil pump system of the extended-range engine. The synchronous belt can be used in an oil environment, wherein the tensile cord unit 5 has good oil resistance and good tensile strength, and can withstand large loads, especially sudden large loads, to ensure the service life of the synchronous belt; the main unit has a higher temperature resistance coefficient, and in a specific use environment, it can withstand a high temperature of 150°C, and the mixed rubber material has a better friction coefficient, which reduces friction loss while correspondingly reducing the noise of the system, specifically by 5 decibels.

[0022] It is worth noting that the fiber length range in the fiber layer in the main unit is controlled between 2-6.5mm, and a length of 4mm is selected in this application. The main purpose of the above-mentioned setting method is to enhance the synchronous belt so as to ensure its tensile strength during the use of the synchronous belt. In one preferred embodiment, the fiber layer is made of Sulun material, and the fiber layer accounts for 0.01-0.06 of the total weight of the main unit. This setting method can optimize the synchronous belt structure through the filling setting of the fiber layer while ensuring that the overall size and weight of the main unit meet the preset requirements.

[0023] The synchronous belt of the present application adopts a meshing method for transmission. Specifically, the outer side of the second main body 2 protrudes outward to form a tooth portion. During operation, the tooth portion can mesh with an external workpiece to effectively play a transmission role.

[0024] In a feasible embodiment, the tooth layer unit 3 and the back layer unit 4 are both made of aramid layer and nylon layer by blending process. The blending process, combined with the selection of aramid and nylon materials, ensures that the tooth layer unit 3 and the back layer unit 4 have good oil resistance and good tensile strength. Combined with the glass wire, the tensile strength of the synchronous belt can be greatly enhanced. While effectively coping with normal work, it can also fully cope with sudden large load phenomena such as clamping. Similarly, the surface of the tooth layer unit 3 and the back layer unit 4 is coated with an oil-resistant Teflon coating.

[0025] In a feasible embodiment, a plurality of ridges 6 are formed on the outer surface of the back layer unit 4, and the plurality of ridges 6 can be in one or more shapes, such as quadrilateral, trapezoidal, and wavy.

[0026] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A synchronous belt for an extended-range engine oil pump, characterized in that: It includes a main body unit, a tooth layer unit located on the first side of the main body unit, and a back layer unit located on the second side of the main body unit, wherein the first side and the second side of the main body unit are arranged back to back, the main body unit includes a first main body part and a second main body part, the first main body part and the second main body part are stacked, a tensile cord unit is arranged between the first main body part and the second main body part, the first main body part, the second main body part and the tensile cord unit extend in the same direction, the tensile cord unit includes a plurality of oil-resistant glass wire members, the first main body part and the second main body part are both made of a rubber material formed by a mixture of a hydrogenated nitrile layer and a fiber layer, the fiber length in the fiber layer ranges from 2 to 6.5 mm, and the second main body part is arranged close to the second side and protrudes outward to form a tooth part.

2. The synchronous belt for the range-extending engine oil pump according to claim 1, characterized in that: The fiber layer is made of Sulon material.

3. The synchronous belt for the range-extending engine oil pump according to claim 1, characterized in that: The tooth layer unit and the back layer unit are both made of an aramid layer and a nylon layer by a blending process.

4. The synchronous belt for the range-extending engine oil pump according to claim 3, characterized in that: The surfaces of the tooth layer unit and the back layer unit are coated with an oil-resistant Teflon coating.

5. The synchronous belt for the range-extending engine oil pump according to claim 1, characterized in that: The fiber layer accounts for 0.01-0.06 of the total weight of the main unit.

6. The synchronous belt for the range-extending engine oil pump according to claim 1, characterized in that: A plurality of ridges are formed on the outer side surface of the back layer unit, and the shapes of the plurality of ridges can be one or more.

7. The synchronous belt for the range-extending engine oil pump according to claim 6, characterized in that: The convex ridges are in one or more of a quadrilateral shape, a trapezoidal shape, and a wavy shape.

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