Shock absorption and noise reduction type inner rotor for oil pump

Abstract

The utility model provides a shock absorption and noise reduction type inner rotor for an oil pump, and relates to the technical field of oil pumps, the shock absorption and noise reduction type inner rotor for the oil pump comprises an inner rotor body, a plurality of mounting grooves are formed in the inner rotor body, damping sound absorption parts are arranged in the mounting grooves, and the damping sound absorption parts are spheres with hollow inner cavities; the outer part is wrapped by the damping sound-absorbing material, the surface of the damping sound-absorbing material is honeycomb-shaped, external noise can be effectively prevented from entering in a hollow state, the noise reduction effect is achieved, and the hollow inner cavity can also reduce the resonance phenomenon of the material, so that the vibration amplitude is reduced; the honeycomb-shaped structure on the surface of the damping sound-absorbing material can convert vibration energy into other energy in the vibration process, and the porosity of the honeycomb-shaped structure enables the damping sound-absorbing material to have good sound-absorbing performance, so that the effects of shock absorption and noise reduction can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumps, in particular to a shock-absorbing and noise-reducing inner rotor for an oil pump. Background Art

[0002] The oil pump is a crucial component in the automotive lubrication system. It is mainly used to increase the oil pressure to ensure that the engine oil can be smoothly transported from the oil pan to other lubricated components of the engine. There are various types of oil pumps, such as gear oil pumps, rotor oil pumps, and rotary oil pumps. Among them, the gear oil pump has been widely used in automotive engines due to its simple structure, easy processing, stable operation, and long service life. The rotor oil pump has the characteristics of a compact structure, small volume, and high pump pressure, and is also suitable for some specific occasions. The rotor oil pump usually includes a housing, an inner rotor, an outer rotor, and a drive shaft. The inner rotor has a specific tooth profile design, usually convex teeth. The tooth profile design of the outer rotor enables it to mesh with the convex teeth of the inner rotor, but the number of teeth is one more than that of the inner rotor, usually concave teeth. The inner rotor is usually driven by the engine to rotate, and the outer rotor rotates synchronously under the drive of the inner rotor. There is a certain eccentricity between the inner and outer rotors, and the inner and outer rotors cooperate with each other to achieve the pumping and circulating flow of the engine oil.

[0003] The inner rotor of the oil pump refers to a rotating component installed inside the oil pump, connected to the drive shaft or directly driven by the crankshaft. The main function of the inner rotor of the oil pump is to ensure the circulation of the engine oil in the lubrication system and deliver a sufficient amount of engine oil to the lubricated parts at a high enough pressure at any engine speed. It sucks the engine oil from the oil pan through the centrifugal force generated by rotation and pressurizes it and discharges it into the lubrication oil path to meet the lubrication requirements of each component of the engine.

[0004] The existing inner rotors of oil pumps will generate vibrations and noises during operation, with poor practicability, which affects the use experience of the oil pump.

[0005] Therefore, it is necessary to provide a new shock-absorbing and noise-reducing inner rotor for an oil pump to solve the above technical problems. Summary of the Utility Model

[0006] To solve the above technical problems, the utility model provides a shock-absorbing and noise-reducing inner rotor for an oil pump.

[0007] A shock-absorbing and noise-reducing inner rotor for an oil pump provided by the present utility model includes an inner rotor body, wherein a plurality of mounting grooves are formed in the inner rotor body, damping and sound-absorbing members are arranged in the mounting grooves, the damping and sound-absorbing members are detachably connected to the mounting grooves through two clamping mechanisms, two limiting grooves are formed in the mounting grooves, the two clamping mechanisms are respectively fixedly connected in the two limiting grooves, the damping and sound-absorbing member is a sphere with a hollow inner cavity, and its exterior is wrapped by a damping and sound-absorbing material, and the surface of the damping and sound-absorbing material is honeycomb-shaped.

[0008] Preferably, the clamping mechanism includes a strong spring and a clamping plate, one end of the strong spring is fixedly connected to the top wall of the mounting groove, and the other end of the strong spring is fixedly connected to the clamping plate.

[0009] Preferably, when the clamping plate clamps the damping and sound-absorbing member, the strong spring is in a compressed state.

[0010] Preferably, the clamping plate is arc-shaped, and a rubber pad is fixedly connected to the surface of the clamping plate close to the damping and sound-absorbing member.

[0011] Preferably, a sealing plug is arranged on the mounting groove.

[0012] Preferably, the sealing plug is made of rubber.

[0013] Preferably, the damping and sound-absorbing material is a polyurethane damping material.

[0014] Compared with the related art, a shock-absorbing and noise-reducing inner rotor for an oil pump provided by the present utility model has the following beneficial effects: for the shock-absorbing and noise-reducing inner rotor for an oil pump, a plurality of mounting grooves are formed in the inner rotor body, damping and sound-absorbing members are detachably connected to the plurality of mounting grooves through clamping mechanisms, and their exteriors are wrapped by a damping and sound-absorbing material, and the surface of the damping and sound-absorbing material is honeycomb-shaped. The hollow inner cavity can effectively isolate the entry of external noise, achieving the effect of noise reduction. The honeycomb-shaped structure on the surface of the damping and sound-absorbing material has the characteristics of porosity and high specific surface area, and can convert the vibration energy into strain energy and heat energy inside the material during the vibration process, thereby dissipating part of the vibration energy. Moreover, the porosity of the honeycomb-shaped structure gives it good sound-absorbing performance, so that the effects of shock absorption and noise reduction can be achieved, improving the use experience of the oil pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a shock-absorbing and noise-reducing inner rotor for an oil pump provided by the present utility model installed inside an outer rotor body;

[0016] Figure 2 is Figure 1 a schematic structural diagram of the shock-absorbing and noise-reducing inner rotor for an oil pump shown in

[0017] Figure 3 is Figure 2 the sectional view of a shock-absorbing and noise-reducing inner rotor for an oil pump as shown;

[0018] Figure 4 is Figure 2 the enlarged view of part A as shown;

[0019] Figure 5 is Figure 4 the sectional view of the damping and sound-absorbing part as shown.

[0020] Reference numerals in the figure: 1. Outer rotor body; 2. Inner rotor body; 3. Sealing plug; 4. Damping and sound-absorbing part; 5. Strong spring; 6. Installation groove; 7. Clamping plate; 8. Damping and sound-absorbing material; 9. Hollow inner cavity; 10. Rotation groove; 11. Convex tooth; 12. Concave tooth; 13. Limit groove. Detailed implementation mode

[0021] The present utility model will be further described below in conjunction with the accompanying drawings and the implementation mode.

[0022] Please refer to Figures 1 - 5 , where Figure 1 is the structural schematic diagram of a shock-absorbing and noise-reducing inner rotor for an oil pump provided by the present utility model; Figure 2 is Figure 1 the structural schematic diagram of the inner rotor body as shown; Figure 3 is Figure 2 the sectional view of the inner rotor body as shown; Figure 4 is Figure 2 the enlarged view of part A as shown; Figure 5 is Figure 4 the sectional view of the damping and sound-absorbing part as shown.

[0023] In the specific implementation process, as Figures 1 - 5 shown, a shock-absorbing and noise-reducing inner rotor for an oil pump includes an inner rotor body 2. The inner rotor body 2 is arranged inside the outer rotor body 1. A plurality of installation grooves 6 are formed on the inner rotor body 2. A damping and sound-absorbing part 4 is arranged in the installation groove 6. The damping and sound-absorbing part 4 is detachably connected to the installation groove 6 through two clamping mechanisms. Two limit grooves 13 are formed in the installation groove 6. The two clamping mechanisms are respectively fixedly connected to the two limit grooves 13. The damping and sound-absorbing part 4 is a sphere with a hollow inner cavity 9 inside, and its exterior is wrapped by a damping and sound-absorbing material 8. The surface of the damping and sound-absorbing material 8 is honeycomb-shaped. The hollow inner cavity can effectively isolate the entry of external noise, achieving the effect of noise reduction. The honeycomb-shaped structure on the surface of the damping and sound-absorbing material 8 has the characteristics of porosity and high specific surface area, and can convert the vibration energy into the strain energy and heat energy inside the material during the vibration process, thereby dissipating part of the vibration energy. Moreover, the porosity of the honeycomb-shaped structure endows it with good sound-absorbing performance, so as to achieve the effects of shock absorption and noise reduction.

[0024] The clamping mechanism includes a strong spring 5 and a clamping plate 7. One end of the strong spring 5 is fixedly connected to the top wall of the installation groove 6, and the other end of the strong spring 5 is fixedly connected to the clamping plate 7. Align the damping sound-absorbing member 4 between the two clamping plates 7 and place the damping sound-absorbing member 4 inward. Since the damping sound-absorbing member 4 is spherical, when the clamping plate 7 is squeezed by the sphere, it will move away from the damping sound-absorbing member 4. At the same time, the strong spring 5 is squeezed by the clamping plate 7 and contracts into the limit groove 13. Due to the natural elastic force of the strong spring 5, the clamping plate 7 has a certain pressure on the damping sound-absorbing member 4, so that the two clamping plates 7 can clamp the damping sound-absorbing member 4.

[0025] When the clamping plate 7 clamps the damping sound-absorbing member 4, the strong spring 5 is in a compressed state, so that the strong spring 5 can have a clamping force on the damping sound-absorbing member 4.

[0026] The clamping plate 7 is arc-shaped, and a rubber pad is fixedly connected to the surface of the clamping plate 7 close to the damping sound-absorbing member 4. The rubber pad makes the friction between the clamping plate 7 and the damping sound-absorbing member 4 greater, so that it can be clamped more tightly.

[0027] A sealing plug 3 is provided on the installation groove 6. The sealing plug 3 is made of rubber, and the sealing plug 3 can effectively prevent foreign objects from entering the installation groove 6.

[0028] The damping sound-absorbing material 8 is a polyurethane damping material. The polyurethane damping material has good sound-absorbing and sound-insulating properties and can effectively absorb high-frequency noise and vibration energy.

[0029] A rotating groove 10 is formed in the middle of the outer rotor body 1. The inner rotor body 2 is arranged in the rotating groove 10. Four convex teeth 11 are fixedly arranged around the inner rotor body 2. Five concave teeth 12 are formed around the rotating groove 10. The convex teeth 11 and the concave teeth 12 cooperate with each other. Such a design ensures that no matter which position it rotates to, the convex teeth 11 of the inner rotor body 2 can contact the concave teeth 12 of the outer rotor body 1. There is a certain eccentricity between the inner rotor body 2 and the outer rotor body 1. This eccentric design enables multiple sealed working chambers to be formed during the rotation process. The inner rotor body 2 is driven to rotate by an external driving member, and the outer rotor body 1 is driven to rotate by the inner rotor body 2. As the inner rotor body 2 and the outer rotor body 1 rotate, the position and size of the working chamber formed by the eccentricity between the inner rotor body 2 and the outer rotor body 1 will constantly change, so as to attract oil into the working chamber.

[0030] The working principle provided by the present utility model is as follows: For the shock-absorbing and noise-reducing inner rotor of the oil pump, a plurality of mounting grooves 6 are provided on the inner rotor body 2, and two clamping mechanisms are arranged in the mounting grooves 6. First, align the damping and sound-absorbing member 4 between the two clamping plates 7 and place the damping and sound-absorbing member 4 inward. Since the damping and sound-absorbing member 4 is a sphere, when the clamping plates 7 are squeezed by the sphere, they will move away from the damping and sound-absorbing member 4. At the same time, the strong spring 5 is squeezed by the clamping plates 7 and contracts into the limiting groove 13. Due to the natural elastic force of the strong spring 5, the clamping plates 7 have a certain pressure on the damping and sound-absorbing member 4, so that the two clamping plates 7 can clamp the damping and sound-absorbing member 4. Then, install the sealing plug 3 on the mounting groove 6 to play a sealing role. Moreover, the surface of the external damping and sound-absorbing material 8 is honeycomb-shaped, which can all play a role in shock absorption and noise reduction. The damping and sound-absorbing material 8 is a polyurethane damping material, and the polyurethane damping material has good sound absorption and sound insulation properties and can effectively absorb high-frequency noise and vibration energy.

[0031] The circuits and controls involved in the present utility model are all prior arts and will not be elaborated herein.

[0032] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A vibration-damping and noise-reducing inner rotor for an oil pump, comprising an inner rotor body (2), characterized in that: The inner rotor body (2) is provided with a plurality of mounting grooves (6), wherein a damping sound absorbing member (4) is arranged in the mounting groove (6), wherein the damping sound absorbing member (4) is detachably connected to the mounting groove (6) via two clamping mechanisms, wherein two limit grooves (13) are provided in the mounting groove (6), wherein the two clamping mechanisms are respectively fixedly connected to the two limit grooves (13), wherein the damping sound absorbing member (4) is a sphere having an internal hollow cavity (9), wherein the outside of the sphere is wrapped with a damping sound absorbing material (8), wherein the surface of the damping sound absorbing material (8) is honeycomb-shaped.

2. The vibration-damping and noise-reducing inner rotor for an oil pump according to claim 1, characterized in that: The clamping mechanism comprises a strong spring (5) and a clamping plate (7), one end of the strong spring (5) being fixedly connected to the top wall of the mounting groove (6), and the other end of the strong spring (5) being fixedly connected to the clamping plate (7).

3. The vibration-damping and noise-reducing inner rotor for an oil pump according to claim 2, characterized in that: When the clamping plate (7) clamps the damping sound absorbing component (4), the strong spring (5) is in a compressed state.

4. The vibration-damping and noise-reducing inner rotor for an oil pump according to claim 3, characterized in that: The clamping plate (7) is arc-shaped, and a rubber pad is fixedly connected to a surface of the clamping plate (7) close to the damping sound absorbing component (4).

5. The vibration-damping and noise-reducing inner rotor for an oil pump according to claim 4, characterized in that: A sealing plug (3) is provided on the installation groove (6).

6. The vibration-damping and noise-reducing inner rotor for an oil pump according to claim 5, characterized in that: The sealing plug (3) is made of rubber.

7. The vibration-damping and noise-reducing inner rotor for an oil pump according to claim 6, characterized in that: The damping sound absorbing material (8) is a polyurethane damping material.

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