Gear pump, suspension system, and vehicle

Abstract

The application relates to a gear pump, a suspension system and a vehicle, the gear pump comprising a housing, a driving gear and a driven gear ring, the driving gear and the driven gear ring being arranged in the housing, the driven gear ring being sleeved on the driving gear and forming a biasing gap between the driving gear and the driven gear ring, and a primary crescent plate and a secondary crescent plate, the primary crescent plate being mounted on the outer peripheral side of the driving gear, and the secondary crescent plate being configured as an integral structure and arranged between the primary crescent plate and the driven gear ring. By mounting one primary crescent plate and one integral secondary crescent plate in the biasing gap between the driving gear and the driven gear ring, the number of parts is reduced, the structure of the gear pump is simplified, the assembly process is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of pump structure technology, and in particular to a gear pump, suspension system and vehicle. Background Technology

[0002] Currently, in related technologies, internal gear pumps include a driving gear, a driven gear ring, and a main crescent plate and two auxiliary crescent plates located between the driving gear and the driven gear ring. This results in a large number of gear pump parts, a complex structure, and cumbersome installation procedures. Therefore, improvements to existing gear pumps are necessary.

[0003] Therefore, a technical solution is needed to address the above problems. Utility Model Content

[0004] This application provides a gear pump, suspension system, and vehicle. By setting an integral sub-crescent plate, the number of parts is reduced, the structure of the gear pump is simplified, the installation process is simplified, and the production efficiency is improved, thereby at least partially solving the above-mentioned technical problems.

[0005] To achieve the above objectives, a first aspect of this application provides a gear pump, comprising:

[0006] case;

[0007] A driving gear and a driven gear ring, wherein the driving gear and the driven gear ring are disposed within the housing, and the driven gear ring is sleeved on the driving gear, forming an offset clearance between them; and

[0008] The main crescent plate and the secondary crescent plate are provided. The main crescent plate is mounted on the outer periphery of the driving gear, and the secondary crescent plate is constructed as an integral structure and is disposed between the main crescent plate and the driven gear ring.

[0009] In some embodiments, the secondary crescent plate includes two sub-crescent plates, which are connected as a single unit by a connecting portion.

[0010] In some embodiments, the secondary crescent plate is provided with at least one first positioning groove, the first positioning groove being used to restrict the secondary crescent from moving circumferentially along the primary crescent plate.

[0011] In some embodiments, a positioning pin is included, and at least one second positioning groove is provided on the main crescent plate, wherein the positioning pin is at least partially embedded in the first positioning groove and the second positioning groove.

[0012] In some embodiments, the first positioning groove and the second positioning groove are configured as through grooves along the radial direction of the driven gear ring.

[0013] In some embodiments, the two opposite wall surfaces of the first positioning groove and the second positioning groove are constructed as mutually parallel planes, and the positioning pin is provided with at least two parallel planes, the parallel planes of the positioning pin respectively abutting and cooperating with the groove walls of the first positioning groove and the second positioning groove.

[0014] In some embodiments, an end gap is provided between the two ends of the secondary crescent plate and the primary crescent plate, and a buffer groove is provided between the primary crescent plate and the secondary crescent plate, the buffer groove being connected to the offset gap through the end gap.

[0015] In some embodiments, including elastic elements and seals, the main crescent plate is provided with at least one mounting groove on the side near the secondary crescent plate, the mounting groove is arranged along the axial direction of the drive gear and is located on the side of the buffer groove away from the end gap;

[0016] The elastic element is disposed in the mounting groove, and the sealing element abuts between the elastic element and the secondary crescent plate.

[0017] In some embodiments, two distribution plates are included, which are respectively disposed on both sides of the driving gear and the driven gear ring and abut against the housing.

[0018] In some embodiments, the housing is provided with a fluid inlet and a fluid outlet respectively; the main crescent plate and the secondary crescent plate divide the offset gap into a first pressure zone and a second pressure zone, the fluid inlet is connected to the first pressure zone, and the fluid outlet is connected to the second pressure zone.

[0019] In some embodiments, a drive mechanism is included, the drive mechanism including a rotating shaft, and the drive gear is sleeved on the rotating shaft.

[0020] A fourth aspect of this application provides a vehicle including the aforementioned gear pump.

[0021] In this embodiment of the application, by installing a main crescent plate and an integral secondary crescent plate in the offset gap between the driving gear and the driven gear ring, compared with the prior art which requires the installation of two independent secondary crescent plates, this application reduces the number of parts, simplifies the structure of the gear pump, and can reduce assembly steps and improve assembly efficiency during production and assembly.

[0022] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0025] Figure 1 This is a cross-sectional structural schematic diagram of a gear pump with a drive mechanism provided in an exemplary embodiment of this application;

[0026] Figure 2 This is a cross-sectional structural schematic diagram of a gear pump body provided in an exemplary embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the installation structure of a driving gear, a driven gear, a main crescent plate, and a secondary crescent plate provided in an exemplary embodiment of this application;

[0028] Figure 4 This is a schematic diagram of another installation structure of the driving gear, driven gear, main crescent plate and auxiliary crescent plate provided in an exemplary embodiment of this application;

[0029] Figure 5 This is an exploded structural diagram of the main crescent plate and the secondary crescent plate in an exemplary embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-Housing shell, 101-First pump housing, 1011-Receiving cavity, 102-Cover plate, 103-Fluid inlet, 104-Fluid outlet;

[0032] 2-Drive gear;

[0033] 3-Driven gear ring;

[0034] 4-Main crescent plate, 41-Second positioning groove, 42-Mounting groove, 43-Buffer groove, 44-Extension;

[0035] 5-Secondary crescent plate, 51-Sub-crescent plate, 52-Connecting part, 53-First positioning groove;

[0036] 6-Positioning pin;

[0037] 7-Seals;

[0038] 8-Elastic component;

[0039] 9-End gap;

[0040] 10 - Offset clearance;

[0041] 11-Drive mechanism, 111-Rotor, 112-Stator, 113-Shaft, 114-Motor housing;

[0042] 121 - First pressure zone, 122 - Second pressure zone;

[0043] 13-Distribution plate;

[0044] 14-Sealing ring. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0046] For the first aspect of this application, please refer to... Figures 1 to 5 A gear pump is provided, comprising a housing 1, a driving gear 2, a driven gear ring 3, a main crescent plate 4, and a secondary crescent plate 5. The driving gear 2 and the driven gear are disposed within the housing 1. The driven gear ring 3 is sleeved on the driving gear 2, forming an offset gap 10 between them. The main crescent plate 4 is fitted to the outer periphery of the driving gear 2. The secondary crescent plate 5 is constructed as an integral structure and disposed between the main crescent plate 4 and the driven gear ring 3. It can be understood that the driven gear ring 3 is sleeved on the outer periphery of the driving gear 2, and the driven gear ring 3 and the driving gear 2 are eccentrically positioned to form the offset gap 10. This offset gap 10 is crescent-shaped. The main crescent plate 4 and the secondary crescent plate 5 are installed within this offset gap 10 to divide the offset gap 10 into two parts, forming a first pressure zone 121 and a second pressure zone 122. In this design, one side of the main crescent plate 4 abuts against the outer periphery of the tooth tip of the driving gear 2, and the other side (the side opposite to the driving gear 2) abuts against the secondary crescent plate 5. The side of the secondary crescent plate 5 opposite to the main crescent plate 4 abuts against the tip surface of the inner tooth of the driven gear ring 3. Furthermore, the mating portions of the driving gear 2, driven gear ring 3, main crescent plate 4, and secondary crescent plate 5 have the same or substantially the same degree of curvature. Compared to the prior art where the secondary crescent plate 5 is divided into two independent parts, this embodiment sets the secondary crescent plate 5 as a whole between the main crescent plate 4 and the driven gear ring 3. This design reduces the number of parts, simplifies the structure of the gear pump, and reduces assembly steps during production, thus improving assembly efficiency.

[0047] In addition, the housing 1 includes a first pump housing 101 and a cover plate 102. The first pump housing 101 has a receiving cavity 1011 for accommodating gear pump components, such as the driving gear 2, driven gear ring 3, main crescent plate 4, and auxiliary crescent plate 5. The cover plate 102 is configured to fit the shape of the opening of the receiving cavity 1011 and covers the opening of the receiving cavity 1011 to form a relatively closed pump body structure.

[0048] In some implementations, please refer to Figures 2 to 4 The housing 1 is provided with a fluid inlet 103 and a fluid outlet 104. The main crescent plate 4 and the secondary crescent plate 5 divide the offset gap 10 into a first pressure zone 121 and a second pressure zone 122. The fluid inlet 103 is connected to the first pressure zone 121, and the fluid outlet 104 is connected to the second pressure zone 122. It can be understood that by connecting the fluid inlet 103 to the first pressure zone 121 and the fluid outlet 104 to the second pressure zone 122, when the drive gear 2 is driven, the first pressure zone 121 and the second pressure zone 122 form high and low pressure zones, respectively, thereby driving the fluid medium and creating a pumping effect. The formation of high and low pressure in the first pressure zone 121 and the second pressure zone 122 changes according to the rotation direction of the drive gear 2. For example, in... Figure 3 In the process, when the drive gear 2 rotates clockwise, the first pressure zone 121 is a high-pressure zone and the second pressure zone 122 is a low-pressure zone. Conversely, when the drive gear 2 rotates counterclockwise, the first pressure zone 121 is a low-pressure zone and the second pressure zone 122 is a high-pressure zone.

[0049] In some implementations, please refer to Figure 5 The secondary crescent plate 5 includes two sub-crescent plates 51, which are connected as a single unit by a connecting part 52. It can be understood that the secondary crescent plate 5's structure, by connecting the two sub-crescent plates 51 together through the connecting part 52, allows for direct assembly of the entire secondary crescent plate 5 between the main crescent plate 4 and the driven gear ring 3, improving assembly efficiency. Furthermore, the integral secondary crescent plate 5 and main crescent plate 4 configuration can reduce or avoid cross-current issues in high and low voltage areas. The connecting part 52 rigidly connects the two sub-crescent plates 51, which are symmetrically arranged. The rigid connection can be achieved through welding, screwing, or by integrally casting, stamping, or 3D printing of the two sub-crescent plates 51 and the connecting part 52. Moreover, the connecting part 52 must ensure structural rigidity while allowing for slight elastic deformation of the sub-crescent plates 51 under hydraulic pressure, improving the sealing performance at the tooth tip.

[0050] In some implementations, please refer to Figure 5The secondary crescent plate 5 is provided with at least one first positioning groove 53, which is used to restrict the circumferential movement of the secondary crescent plate 5 along the main crescent plate 4. It can be understood that by providing the first positioning groove 53 to facilitate the positioning and installation of the secondary crescent plate 5, and by restricting the circumferential movement of the secondary crescent plate 5 along the main crescent plate 4, circumferential displacement of the secondary crescent plate 5 is eliminated, thereby reducing the probability of collision between the main crescent plate 4 and the secondary crescent plate 5. The reason for the collision is that the main crescent plate 4 has extensions 44 at both ends along its circumferential length direction, which extend toward the secondary crescent plate 5. The extensions 44 form steps on the main crescent plate 4, and the secondary crescent plate 5 is disposed between the two extensions 44 to restrict the circumferential movement of the secondary crescent plate 5. In existing technologies, during pump operation, the two separate secondary crescent plates 5 collide with the extension 44 of the main crescent plate 4 under fluid action, resulting in abnormal noise. This is particularly problematic when used in vehicle components, causing vehicle noise and reducing the driving experience. The integrated secondary crescent plate 5 and its positioning method of this application effectively avoid the noise problem caused by the circumferential displacement of the secondary crescent plate 5 and the main crescent plate 4. It should be noted that the number of first positioning grooves 53 is at least one, and typically two are provided, located on both sides of the secondary crescent plate 5 along its length. Furthermore, the first positioning groove 53 is located in the middle of the secondary crescent plate 5; specifically, the first positioning groove 53 is located between the two sub-crescent plates 51.

[0051] In some implementations, please refer to Figures 3 to 5 The system includes a positioning pin 6, and at least one second positioning groove 41 is provided on the main crescent plate 4. The positioning pin 6 is at least partially embedded in the first positioning groove 53 and the second positioning groove 41. It can be understood that the main crescent plate 4 is provided with second positioning grooves 41, and the number of these second positioning grooves 41 is set as needed, with at least one, and usually two. The number of second positioning grooves 41 matches the number of first positioning grooves 53. When two second positioning grooves 41 are provided, they are respectively located on both sides of the main crescent plate 4 along its axial length; that is, the two second positioning grooves 41 are respectively located on both sides of the main crescent plate 4 along the axial direction of the driven gear ring 3, and both are located at the circumferential center of the main crescent plate 4. Furthermore, a positioning pin 6 is installed on the housing 1, and the positioning pin 6 is at least partially embedded in the first positioning groove 53 and the second positioning groove 41, so that the main crescent plate 4 and the secondary crescent plate 5 are positioned in a predetermined manner. This design allows for the simultaneous positioning of both the main crescent plate 4 and the secondary crescent plate 5 by a single positioning pin 6. The number of positioning pins 6 is the same as the number of the first positioning groove 53 or the second positioning groove 41, and one positioning pin 6, one first positioning groove 53, and one second positioning groove 41 form a positioning structure.

[0052] It should be noted that the secondary crescent plate 5 is positioned by the first positioning groove 53 and the positioning pin 6, which can avoid the problem of the secondary crescent plate 5 colliding with the main crescent plate 4 in the circumferential direction of the main crescent plate 4 when the gear pump is running, thereby improving the NVH performance of the vehicle.

[0053] In some embodiments, the first positioning groove 53 and / or the second positioning groove 41 are configured as through grooves along the radial direction of the driven gear ring 3. It is understood that the arrangement of the first positioning groove 53 and the second positioning groove 41 can take many forms; for example, they can be configured as blind grooves or extend in multiple directions. In one example, the first positioning groove 53 is configured as a through groove, and the side of the second positioning groove 41 away from the first positioning groove 53 is configured as a blind groove, with the blind groove wall spaced apart from the positioning pin to avoid restricting the movement of the main meniscus plate 4. Similarly, in another example, the second positioning groove 41 is configured as a through groove, and the side of the first positioning groove 53 away from the second positioning groove 41 is configured as a blind groove, with the blind groove wall spaced apart from the positioning pin to avoid restricting the movement of the main meniscus plate 4. A common arrangement is that the first positioning groove 53 and the second positioning groove 41 are configured as through grooves along the radial direction of the driven gear ring 3, thereby enabling effective positioning of the secondary meniscus plate 5 in the circumferential direction of the main meniscus plate 4 and restricting the circumferential movement of the secondary meniscus plate 5. Furthermore, since the gear pump requires a good seal in the offset gap between the driven gear ring 3 and the driving gear 2 during operation, the driving gear 2, the main crescent plate 4, the auxiliary crescent plate 5, and the driven gear ring 3 need to be tightly abutted in sequence. Due to various reasons, the main crescent plate 4 and the auxiliary crescent plate 5 may shift radially along the driven gear ring. Therefore, the main crescent plate 4 and the auxiliary crescent plate 5 need to be able to adaptively and dynamically adjust in the radial direction along the driven gear ring 3 to improve the sealing effect. Therefore, the first positioning groove 53 and the second positioning groove 41 are set as through groove structures and are set in the radial direction of the driven gear ring 3.

[0054] In some embodiments, the two opposing groove walls of the first positioning groove 53 and the second positioning groove 41 are constructed as parallel planes. The positioning pin 6 has at least two parallel planes, and the parallel planes of the positioning pin 6 respectively abut against the groove walls of the first positioning groove 53 and the second positioning groove 41. It can be understood that the first positioning groove 53 and the second positioning groove 41 have groove walls with parallel planar structures; in other words, the first positioning groove 53 and the second positioning groove 41 are through grooves with rectangular cross-sections. The positioning pin 6 has at least two parallel planes, so that the positioning pin 6 can cooperate with the groove walls of the first positioning groove 53 and the second positioning groove 41 in a planar pair manner. This arrangement can both restrict the circumferential movement of the main crescent plate 4 and the secondary crescent plate 5 (along the driving gear 2) and allow the main crescent plate 4 and the secondary crescent plate 5 to adaptively adjust with a small displacement in the radial direction of the driven gear ring 3. Furthermore, by changing the mating surface of the main crescent plate and the locating pin from the existing locating groove with one end larger than the other to a locating groove composed of two parallel planes (first locating groove 53 and second locating groove 41), it is beneficial to reduce the cumulative error of the locating pin groove. Compared with the manufacturing process of the non-standard locating groove with one end larger than the other, the locating groove of this application is relatively easy to manufacture, which helps to reduce the manufacturing difficulty and makes it easier to measure the gap, especially in controlling the small gaps at critical positions, such as the mating of the main and auxiliary crescent plates and the locating pin. This design allows the size of the gap to be controlled more precisely, avoiding the accumulation of errors caused by angle issues, thereby improving the accuracy of the assembly process and the quality of the finished product. At the same time, it simplifies the production process and improves production efficiency and product yield.

[0055] In some implementations, please refer to Figure 3An end gap 9 is provided between the two ends of the secondary crescent plate 5 and the primary crescent plate 4. A buffer groove 43 is provided between the primary crescent plate 4 and the secondary crescent plate 5, and the buffer groove 43 is connected to the offset gap 10 through the end gap 9. It can be understood that when the driving gear 2 is driven to rotate, a high-pressure zone is formed in the offset gap 10 separated by the primary crescent plate 4 and the secondary crescent plate 5. In the high-pressure zone, the high-pressure liquid flows through the end gap 9 to the buffer groove 43. The high-pressure liquid forms a medium pressure on the walls of the primary crescent plate 4 and the secondary crescent plate 5 in the buffer groove 43, thereby making the primary crescent plate 4 in close contact with the tooth tip of the driving gear 2, and the secondary crescent plate 5 in close contact with the tooth tip of the driven gear ring 3. This can better transmit the pressure fluctuation of the fluid between the driving gear 2 and the driven gear ring 3 to the primary crescent plate 4 and the secondary crescent plate 5, optimize the hydrodynamic performance of the internal gear pump, and improve the working efficiency of the internal gear pump. Specifically, the buffer groove 43 is configured to be located on the side of the main crescent plate 4 near the secondary crescent plate 5, or on the side of the secondary crescent plate 5 near the main crescent plate 4, or on adjacent sides of both the main crescent plate 4 and the secondary crescent plate 5. Typically, the buffer groove 43 is located on the main crescent plate 4. Furthermore, two buffer grooves 43 are provided, symmetrically arranged on both sides of the main crescent plate 4 along its circumferential length. The circumferential length of the buffer groove 43 is typically set to be approximately 20%-30% of the circumferential length of the secondary crescent plate 5. It should be noted that, since the driving gear 2 and driven gear ring 3 are equipped with distribution plates 13 and other components that restrict the flow of liquid from both sides of the driving gear 2 and driven gear ring 3, the distribution plates 13, the main crescent plate 4, and the secondary crescent plate 5 together constitute the fluid space of the buffer groove 43.

[0056] In some embodiments, the buffer groove 43 includes an elastic element 8 and a sealing element 7. The main crescent plate 4 has at least one mounting groove 42 on the side near the secondary crescent plate 5. The mounting groove 42 is arranged along the axial direction of the drive gear 2 and is located on the side of the buffer groove 43 away from the end gap 9. The elastic element 8 is disposed within the mounting groove 42, and the sealing element 7 abuts against the elastic element 8 and the secondary crescent plate 5. It is understood that the mounting groove 42 is provided on the side of the buffer groove 43 away from the end gap 9, and the sealing element 7 is disposed within the mounting groove 42. The elastic element 8 abuts the sealing element 7 between adjacent surfaces of the main crescent plate 4 and the secondary crescent plate 5, thereby creating a good sealing effect between the main crescent plate 4 and the secondary crescent plate 5. This restricts the flow of fluid medium from the buffer groove 43 from the first pressure zone 121 to the second pressure zone 122, or from the second pressure zone 122 to the first pressure zone 121. Specifically, the mounting groove 42 is a through groove structure, arranged along the axial direction of the driven gear ring 3, with a roughly triangular cross-section. The elastic element 8 is a variety of elastic components, such as a spring sheet. The seal 7 is a circular cylindrical structure, typically a sealing rod, with a diameter larger than the gap between the main crescent plate 4 and the secondary crescent plate 5. Furthermore, there are usually two mounting grooves 42, symmetrically arranged along the length of the main crescent plate 4. Each buffer groove 43 is equipped with a sealing structure consisting of the elastic element 8, the seal 7, and the mounting groove 42.

[0057] In some implementations, please refer to Figures 2 to 5 The system includes two distribution plates 13, which are respectively disposed on both sides of the driving gear 2 and the driven gear ring 3, and abut against the housing 1. The two distribution plates 13 are disposed on both sides of the driving gear 2 and the driven gear ring 3, and abut against the housing 1 on the side opposite to the driving gear 2 and the driven gear ring 3, thus forming a pump chamber structure between the driven gear ring 3, the driving gear 2, and the two distribution plates 13. Specifically, a sealing ring 14 is provided between one distribution plate 13 and the first pump casing 101 of the housing 1 for sealing, and a sealing ring 14 is provided between the other distribution plate 13 and the cover plate 102 of the housing 1 for sealing. Furthermore, the distribution plates 13 are provided with flow ports, and the fluid inlet 103 and the fluid outlet 104 are respectively connected to the first pressure zone 121 and the second pressure zone 122 through different flow ports.

[0058] In some embodiments, a drive mechanism 11 is included, which includes a rotating shaft 113, on which the drive gear 2 is mounted. It is understood that the drive mechanism 11 drives the rotating shaft 113 to rotate, and the rotation of the rotating shaft 113 drives the drive gear 2 to rotate and perform work. The drive mechanism 11 can be an internal combustion engine or an electric motor. The electric motor includes a stator 112 and a rotor 111 disposed within the stator 112. The stator 112 and rotor 111 are disposed within a motor housing 114. The rotating shaft 113 is disposed on the rotor 111, and the rotor 111 and the drive gear 2 share the rotating shaft 113 to reduce the number of components.

[0059] In a second aspect, this application provides a suspension system including the gear pump described above. Since the suspension system has all the technical features of the gear pump, the suspension system according to the embodiment of this utility model also has all the technical effects of the gear pump described above.

[0060] In a third aspect, this application provides a vehicle that includes the aforementioned suspension system. Since the vehicle possesses all the technical features of the suspension system, the vehicle according to the embodiment of this utility model also possesses all the technical effects of the aforementioned suspension system.

[0061] The connectors and other components and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0062] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0063] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0064] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0065] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A gear pump characterized by, include: Shell (1); The driving gear (2) and the driven gear ring (3) are disposed in the housing (1). The driven gear ring (3) is sleeved on the driving gear (2) and forms an offset gap (10) with the driving gear (2). as well as The main crescent plate (4) and the secondary crescent plate (5) are mounted on the outer periphery of the driving gear (2), and the secondary crescent plate (5) is constructed as an integral structure and is disposed between the main crescent plate (4) and the driven gear ring (3).

2. The gear pump of claim 1, wherein The sub-lunar plate (5) includes two sub-lunar plates (51), which are connected as one unit by a connecting part (52).

3. The gear pump of claim 1, wherein, The secondary crescent plate (5) is provided with at least one first positioning groove (53), which is used to restrict the secondary crescent from moving circumferentially along the main crescent plate (4).

4. The gear pump of claim 3, wherein, Including a positioning pin (6), the main crescent plate (4) is provided with at least one second positioning groove (41), and the positioning pin (6) is at least partially embedded in the first positioning groove (53) and the second positioning groove (41).

5. The gear pump of claim 4, wherein, The first positioning groove (53) and / or the second positioning groove (41) are configured as through grooves along the radial direction of the driven gear ring (3).

6. The gear pump of claim 4, wherein, The two opposite groove walls of the first positioning groove (53) and the second positioning groove (41) are constructed as mutually parallel planes. The positioning pin (6) is provided with at least two parallel planes, and the parallel planes of the positioning pin (6) respectively abut against the groove walls of the first positioning groove (53) and the second positioning groove (41).

7. The gear pump of claim 1, wherein, An end gap (9) is provided between the two ends of the secondary crescent plate (5) and the main crescent plate (4). A buffer groove (43) is provided between the main crescent plate (4) and the secondary crescent plate (5). The buffer groove (43) is connected to the offset gap (10) through the end gap (9).

8. The gear pump of claim 7, wherein, Includes an elastic element (8) and a sealing element (7). The main crescent plate (4) is provided with at least one mounting groove (42) on the side near the secondary crescent plate (5). The mounting groove (42) is arranged along the axial direction of the drive gear (2) and is located on the side of the buffer groove (43) away from the end gap (9). The elastic element (8) is disposed in the mounting groove (42), and the sealing element (7) abuts between the elastic element (8) and the sub-lunar plate (5).

9. A gear pump according to any one of claims 1-8, characterized in that It includes two distribution disks (13), which are respectively disposed on both sides of the driving gear (2) and the driven gear ring (3) and abut against the housing (1).

10. A gear pump according to any one of claims 1-8, characterized in that The housing (1) is provided with a fluid inlet (103) and a fluid outlet (104); the main crescent plate (4) and the secondary crescent plate (5) divide the offset gap (10) into a first pressure zone (121) and a second pressure zone (122), the fluid inlet (103) is connected to the first pressure zone (121), and the fluid outlet (104) is connected to the second pressure zone (122).

11. A gear pump according to any one of claims 1-8, characterized in that It includes a drive mechanism (11), the drive mechanism (11) includes a rotating shaft (113), and the drive gear (2) is sleeved on the rotating shaft (113).

12. A suspension system characterized by, Includes the gear pump according to any one of claims 1-11.

13. A vehicle characterized by comprising: Includes the gear pump as described in claim 1.

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