Side pressing plate, oil pump and vehicle

Abstract

The utility model discloses a side pressing plate, an oil pump and a vehicle. The side pressing plate comprises a plate body, the plate body is provided with a first surface and a second surface which are oppositely arranged in the axial direction of the plate body, a pressure groove is formed in the first surface, a pressure through hole is formed in the groove bottom face of the pressure groove, the pressure through hole extends to the second surface in the axial direction of the plate body, and a plurality of oil guide grooves are further formed in the first surface. The multiple oil guide grooves communicate with the pressure groove, and an oil guide through hole is formed in the groove bottom face of at least one oil guide groove and extends to the second surface in the axial direction of the plate body. According to the side pressing plate, double-face oil guiding is adopted for pressure relief, the pressure relief speed is high, the pressure fluctuation balance effect is good, and therefore the leakage risk caused by the fact that the plate body is pushed away by front face pressure due to the fact that only front face oil guiding is conducted is reduced, and the stability of mutual attachment of the plate body and a gear of an oil pump is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic transmission equipment technical field especially relates to a side pressing plate, oil pump and vehicle. BACKGROUND

[0002] The internal meshing cycloid gear pump is widely used in hydraulic transmission system because of its compact structure, small flow pulsation and other advantages. However, under high pressure or high frequency working condition, the local pressure fluctuation of the side pressing plate area is easy to cause cavitation, cavitation erosion, vibration noise and volumetric efficiency reduction, which seriously affects the service life of the pump. In the related technology, the front or back surface of the side pressing plate is designed to guide oil, thereby balancing the pressure fluctuation. However, the single side oil guiding structure can only adjust the pressure difference through the flow of oil in a single direction, and the pressure fluctuation suppression efficiency is low. SUMMARY

[0003] The utility model aims at at least in certain extent solves one of the technical problems in the related art.

[0004] Therefore, the embodiment of the utility model provides a side pressing plate with double-sided oil guiding.

[0005] The utility model discloses an oil pump.

[0006] The utility model discloses a vehicle.

[0007] The side pressing plate of the embodiment of the utility model includes a plate body, the plate body has a first surface and a second surface arranged oppositely in the axial direction thereof, a pressure groove is arranged on the first surface, a pressure through hole is arranged on the groove bottom surface of the pressure groove, the pressure through hole extends to the second surface along the axial direction of the plate body, a plurality of oil guiding grooves are further arranged on the first surface, the plurality of oil guiding grooves are communicated with the pressure groove, and an oil guiding through hole is arranged on the groove bottom surface of at least one oil guiding groove.

[0008] The side pressing plate of the embodiment of the utility model not only can guide oil through the oil guiding groove on the front surface (the first surface) of the plate body, but also can make hydraulic oil flow to the back surface (the second surface) of the plate body through the oil guiding through hole to guide oil on the back surface, so that the pressure is released on both sides, the pressure release speed is fast, the pressure fluctuation balancing effect is good, thereby reducing the risk of leakage caused by the front surface pressure pushing away the plate body due to only front surface oil guiding, and the stability of the mutual adhesion of the plate body and the gear of the oil pump is improved.

[0009] In some embodiments, the pressure groove extends along the circumferential direction of the plate body, the pressure groove has a first end and a second end in the extension direction thereof, and the width of the pressure groove gradually decreases from the first end to the second end in the extension direction thereof.

[0010] In some embodiments, the pressure through holes are two, the two pressure through holes are arranged along the extension direction of the pressure groove, and one of the pressure through holes is close to the first end of the pressure groove, and the other pressure through hole is located at the middle section of the pressure groove.

[0011] In some embodiments, the plurality of oil guide grooves are arranged along the radial direction of the plate body, and the oil guide grooves are in communication with the first end of the pressure groove.

[0012] In some embodiments, the plurality of oil guide grooves include a first oil guide groove, a second oil guide groove and a third oil guide groove, and the first oil guide groove, the second oil guide groove and the third oil guide groove are arranged in sequence along the direction close to the center of the plate body.

[0013] In some embodiments, the first oil guide groove includes a first oil guide narrow section and a first oil guide wide section in communication, one end of the first oil guide wide section away from the first oil guide narrow section is in communication with the first end of the pressure groove, and the oil guide through hole is arranged on the groove bottom surface of the first oil guide wide section, and the oil guide through hole is located at one end of the first oil guide wide section close to the first oil guide narrow section.

[0014] In some embodiments, the oil guide through hole is arranged on the groove bottom surface of the second oil guide groove, and the oil guide through hole is located at one end of the second oil guide groove away from the pressure groove.

[0015] In some embodiments, the pressure groove, the pressure through hole, the oil guide groove and the oil guide through hole are defined as the pressure balance part of the plate body, and the pressure balance part of the plate body has one or two oppositely arranged.

[0016] The oil pump of the embodiment of the utility model includes the side pressing plate in any one of the above embodiments.

[0017] The vehicle of the embodiment of the utility model includes the side pressing plate in any one of the above embodiments, or the oil pump in the above embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the first schematic view of the side pressing plate of the embodiment of the utility model.

[0019] Fig. 2 It is the second schematic view of the side pressing plate of the embodiment of the utility model.

[0020] Fig. 3 It is the explosion schematic view of the oil pump of the embodiment of the utility model.

[0021] REFERENCE SIGNS:

[0022] 1-Plate body, 101-First surface, 102-Second surface, 103-Pressure groove, 104-Pressure through hole, 105-Oil guide groove, 1051-First oil guide groove, 10511-First narrow oil guide section, 10512-First wide oil guide section, 1052-Second oil guide groove, 1053-Third oil guide groove, 106-Oil guide through hole, 1061-First oil guide through hole, 1062-Second oil guide through hole,

[0023] 2-Housing, 3-Gear, 4-Sealing ring. Detailed Implementation

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] The side pressure plate of an embodiment of this utility model is described below with reference to the accompanying drawings.

[0026] like Figs. 1-3 As shown, the side pressure plate of this embodiment includes a plate body 1, which has a first surface 101 and a second surface 102 arranged opposite to each other in its axial direction. It should be noted that in the internal gear oil pump, the first surface 101 of the side pressure plate of this embodiment is in contact with the gear 3 and is the front, while the second surface 102 of the plate body 1 is away from the gear and is the back.

[0027] A pressure groove 103 is provided on the first surface 101, and a pressure through hole 104 is provided on the bottom surface of the pressure groove 103. The pressure through hole 104 extends along the axial direction of the plate 1 to the second surface 102. High-pressure oil delivered by the oil pump through the internal and external gears 3 flows into the pressure groove 103, and then is discharged through the pressure through hole 104 and the oil outlet on the oil pump.

[0028] Optionally, the pressure groove 103 extends circumferentially along the plate 1, and has a first end and a second end in its extending direction. The width of the pressure groove 103 gradually decreases along its extending direction from the first end to the second end. That is, the pressure groove 103 has a waist-shaped tapering structure, and high-pressure oil flows in from the first end of the pressure groove 103.

[0029] There are two pressure through holes 104, which are arranged at intervals along the extending direction of the pressure groove 103. One pressure through hole 104 is close to the first end of the pressure groove 103, and the other pressure through hole 104 is located in the middle section of the pressure groove 103. The dual through hole design increases the total cross-sectional area of ​​the pressure relief channel, allowing high-pressure oil to be discharged from two positions simultaneously.

[0030] The pressure through hole 104 near the first end of the pressure groove 103 is mainly used for quickly releasing the high pressure oil in the inlet area. Since the high pressure oil flows from the first end (wide opening), the oil flow is fast and the pressure is concentrated, the pressure through hole 104 can quickly release the pressure to avoid the risk of cavitation caused by excessive local pressure.

[0031] The pressure through hole 104 in the middle section is used to balance the pressure fluctuation in the middle section of the pressure groove 103. As the groove width gradually narrows, the oil flow rate increases, but due to the tapered structure, a sub-high pressure area may be formed in the middle section due to flow resistance. The second through hole can be used to release pressure and eliminate pressure gradient jumps.

[0032] The first surface 101 is also provided with a plurality of oil guide grooves 105, and the plurality of oil guide grooves 105 are in communication with the pressure groove 103. Since there is pressure fluctuation when the high pressure oil flows from the gear gap to the pressure groove 103, the oil guide grooves 105 are arranged to guide the oil in the front to balance the pressure fluctuation. The plurality of oil guide grooves 105 are arranged in the radial direction of the plate body 1, and the positions of the oil guide grooves 105 on the plate body 1 are designed according to the distribution of the internal parts of the oil pump. The oil guide grooves 105 are in communication with the first end of the pressure groove 103.

[0033] For example, the plurality of oil guide grooves 105 include a first oil guide groove 1051, a second oil guide groove 1052, and a third oil guide groove 1053, which are arranged in sequence in a direction close to the center of the plate body 1.

[0034] The first oil guide groove 1051 is located at a position corresponding to the outer gear of the plate body 1, and is mainly used to balance the pressure fluctuation when the hydraulic oil transported by the outer gear enters the pressure groove 103. The second oil guide groove 1052 is located at a position corresponding to the gap between the oil pump's crescent block and the crescent plate of the plate body 1, and is mainly used to make the hydraulic oil flow into the gap between the oil pump's crescent block and the crescent plate, thereby improving the stability of the radial seal. The third oil guide groove 1053 is located at a position corresponding to the inner gear of the plate body 1, and is mainly used to balance the pressure fluctuation when the hydraulic oil transported by the inner gear enters the pressure groove 103.

[0035] Specifically, the first oil guide groove 1051 includes a first oil guide narrow section 10511 and a first oil guide wide section 10512 in communication, and an end of the first oil guide wide section 10512 away from the first oil guide narrow section 10511 is in communication with the first end of the pressure groove 103, so that the high pressure oil enters the pressure groove 103 through the first oil guide groove 1051 with a gradually changing cross section from narrow to wide, effectively balancing the pressure fluctuation.

[0036] Further, at least one oil guide groove 105 is provided with an oil guide through hole 106 on the groove bottom surface, and the oil guide through hole 106 extends to the second surface 102 in the axial direction of the plate body 1.

[0037] For example, a first oil guiding hole 1061 is provided on the bottom surface of the first oil guiding wide section 10512, and the first oil guiding hole 1061 is located at the end of the first oil guiding wide section 10512 near the first oil guiding narrow section 10511. Through the hydraulic oil in the first oil guiding narrow section 10511, part of the oil is diverted through the first oil guiding hole 1061 to the back of the plate 1 and flows into the pressure groove 103, realizing double-sided pressure relief.

[0038] It should be noted that a sealing ring 4 is provided between the back of plate 1 and oil pump housing 2, and there is a certain gap between the two. Therefore, the hydraulic oil flowing to the back of plate 1 can also push plate 1 to better fit the external gear.

[0039] Therefore, the side pressure plate of this utility model embodiment can not only guide oil through the oil guide groove 105 on the front side (first surface 101) of the plate body 1, but also guide hydraulic oil to the back side (second surface 102) of the plate body 1 through the oil guide hole 106 for back oil guidance. The pressure relief is achieved by guiding oil on both sides, which has a fast pressure relief speed and a good pressure fluctuation balance effect. This reduces the risk of leakage caused by the front pressure pushing the plate body 1 open due to only guiding oil on the front side, and helps to improve the stability of the gear meshing between the plate body 1 and the oil pump.

[0040] In some embodiments, such as Figs. 1-3 As shown, the bottom surface of the second oil guide groove 1052 is provided with an oil guide hole 106, which is located at the end of the second oil guide groove 1052 away from the pressure groove 103.

[0041] Understandably, the hydraulic oil flowing to the gap between the crescent block and the crescent plate of the oil pump is also connected in parallel in two paths, thereby reducing the pressure fluctuation of the hydraulic oil entering the gap, and thus reducing the force fluctuation of the crescent block and the crescent plate, making the radial seal more stable and reliable.

[0042] In some embodiments, the pressure groove 103, pressure through hole 104, oil guide groove 105, and oil guide through hole 106 are defined as pressure balancing parts of the plate 1, and the pressure balancing parts of the plate 1 may be one or two arranged opposite to each other. That is, the number and layout of the pressure balancing parts are designed specifically according to the operating characteristics (unidirectional / bidirectional) of the oil pump.

[0043] The oil flow direction of the unidirectional pump is fixed, and the pressure fluctuations generated by the gear rotation are mainly concentrated in one side area of ​​the side pressure plate (corresponding to the high-pressure area of ​​the external gear meshing). A single pressure balancing part (including pressure groove 103, pressure through hole 104, oil guide groove 105 and oil guide through hole 106) covers the high-pressure area circumferentially, and directional pressure relief is achieved through the tapered groove and multi-stage oil guide groove 105.

[0044] The bidirectional pump needs to adapt to the forward and reverse rotation conditions, and the high-pressure area of oil liquid symmetrically migrates with the rotation direction of the gear.

[0045] The oil pump in the embodiment of the utility model includes the side pressing plate in any one of the above embodiments.

[0046] The vehicle in the embodiment of the utility model includes the side pressing plate in any one of the above embodiments, or the oil pump in the above embodiment.

[0047] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0048] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0049] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0050] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0051] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean 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 application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0052] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Changes, modifications, replacements and variations of the above embodiments made by those skilled in the art are within the scope of the present application.

Claims

1. A side clamp characterized in that, The plate body has a first surface and a second surface arranged oppositely in the axial direction of the plate body, the first surface is provided with a pressure groove, the groove bottom surface of the pressure groove is provided with a pressure through hole, the pressure through hole extends to the second surface along the axial direction of the plate body, and the first surface is further provided with a plurality of oil guide grooves, the plurality of oil guide grooves are in communication with the pressure groove, the groove bottom surface of at least one of the oil guide grooves is provided with an oil guide through hole, and the oil guide through hole extends to the second surface along the axial direction of the plate body.

2. The side pressure plate of claim 1, wherein The pressure groove extends along the circumferential direction of the plate body, the pressure groove has a first end and a second end in the extension direction of the pressure groove, and the width of the pressure groove gradually decreases from the first end to the second end in the extension direction of the pressure groove.

3. The side pressure plate of claim 2, wherein, The pressure through hole has two, the two pressure through holes are arranged at intervals along the extension direction of the pressure groove, and one of the pressure through holes is close to the first end of the pressure groove, and the other pressure through hole is located at the middle section of the pressure groove.

4. The side pressure plate of claim 2, wherein, The plurality of oil guide grooves are arranged at intervals along the radial direction of the plate body, and the oil guide grooves are in communication with the first end of the pressure groove.

5. The side pressure plate of claim 4, wherein, The plurality of oil guide grooves include a first oil guide groove, a second oil guide groove and a third oil guide groove, and the first oil guide groove, the second oil guide groove and the third oil guide groove are arranged in sequence in the direction close to the center of the plate body.

6. The side pressure plate of claim 5, wherein, The first oil guide groove includes a first oil guide narrow section and a first oil guide wide section in communication, one end of the first oil guide wide section away from the first oil guide narrow section is in communication with the first end of the pressure groove, the groove bottom surface of the first oil guide wide section is provided with the oil guide through hole, and the oil guide through hole is located at one end of the first oil guide wide section close to the first oil guide narrow section.

7. The side pressure plate of claim 5, wherein, The groove bottom surface of the second oil guide groove is provided with the oil guide through hole, and the oil guide through hole is located at one end of the second oil guide groove away from the pressure groove.

8. The side pressure plate according to any one of claims 1-7, characterized in that, The pressure groove, the pressure through hole, the oil guide groove and the oil guide through hole are defined as a pressure balance part of the plate body, and the pressure balance part of the plate body has one or two oppositely arranged.

9. An oil pump characterized by comprising: The side plate comprises the side plate according to any one of claims 1-8.

10. A vehicle characterized by comprising: The side plate comprises the side plate according to any one of claims 1-8, or the oil pump comprises the side plate according to claim 9.

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