Separated crescent plate assembly and internal gear pump

Abstract

The utility model discloses a separate crescent plate subassembly and internal gear pump, including crescent plate, crescent side plate, shrapnel and elastic stick, the outer wall of crescent plate is provided with the through crescent groove, the both sides of crescent groove are respectively provided with the crescent side plate matched with the crescent groove, the crescent groove is internally provided with the movable groove, and the elastic stick is provided with the movable groove. An elastic piece is arranged at the bottom of the movable groove, an elastic stick is arranged between the elastic piece and the crescent side plate, and the axis of the elastic stick, the axis of the crescent groove and the axis of the crescent side plate are all parallel to the axis of the crescent plate. The two crescent side plates are arranged on the outer side of the crescent plate for compensation, a good compensation effect is achieved no matter whether a gear in the pump rotates forwards or reversely, and meanwhile the elastic piece and the elastic stick are arranged for sealing, so that the sealing effect in the pressurizing process is better.

Description

Technical Field

[0001] The utility model relates to the field of internal meshing gear pumps, in particular to a separate crescent plate component and an internal meshing gear pump. Background Art

[0002] Internal gear pumps are positive displacement pumps. Because they can maintain high volumetric efficiency at high outlet pressures, hydraulic pumps with high outlet pressures often use internal gear pumps. Current internal gear hydraulic pumps have two types of crescent plate assemblies: one-piece and split-piece. The one-piece crescent plate lacks radial compensation, requiring high machining precision to ensure low wear over long periods of operation. The split-piece crescent plate, on the other hand, incorporates a crescent side plate for compensation and cannot achieve reverse rotation. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a separable crescent plate assembly and an internal gear pump.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A detachable crescent plate assembly comprises a crescent plate, a crescent side plate, a spring piece and an elastic rod, wherein a crescent groove is provided on the outer wall of the crescent plate, and crescent side plates cooperating with the crescent groove are respectively provided on both sides of the crescent groove, a movable groove is provided in the crescent groove, the spring piece is provided on the bottom of the movable groove, and the elastic rod is provided between the spring piece and the crescent side plate, and the axis of the elastic rod, the axis of the crescent groove and the axis of the crescent side plate are all arranged parallel to the axis of the crescent plate.

[0006] Furthermore, the two ends of the crescent plate are flush with the two ends of the crescent side plate, the two ends of the elastic rod are flush with the two ends of the crescent side plate, and the two crescent side plates are symmetrically arranged.

[0007] Furthermore, drainage grooves cooperating with the crescent side plates are provided on both ends of the crescent groove, and drainage slopes cooperating with the drainage grooves are provided on the four corners of the crescent side plates.

[0008] Furthermore, anti-collision slopes are provided on both sides of the outer wall of the crescent side plate.

[0009] Furthermore, the spring piece is arranged in a bow shape, and the middle part of the spring piece is arranged to protrude toward the elastic rod.

[0010] An internal gear pump comprises a pump body, a pump cover, a transmission shaft, a driving gear, a driven gear, a stabilizing block and a detachable crescent plate assembly, wherein the pump cover is sealed and fixedly arranged on the pump body, a pump chamber that cooperates with the driven gear is provided in the pump body, the driving gear is rotatably arranged in the driven gear and meshes with the driven gear, the transmission shaft is sealed and arranged on the pump body and fixedly connected to the driving gear, the inner wall of the crescent plate cooperates with the driving gear, and the outer wall of the crescent side plate cooperates with the driven gear, one end of the stabilizing block is arranged on the crescent plate, and the other end of the stabilizing block is arranged on the pump cover, and two oil passages are provided on the pump cover, and the two oil passages are respectively connected to the two end sides of the crescent plate.

[0011] Furthermore, a limiting groove is provided on the middle portion of the crescent plate to cooperate with the end portion of the stabilizing block.

[0012] Furthermore, a wear-resistant ring is provided between the side wall of the pump chamber and the outer wall of the driven gear.

[0013] Furthermore, a first wear-resistant plate is provided between the driven gear and the bottom of the pump chamber.

[0014] Furthermore, a second wear-resistant plate is provided between the pump cover and the driven gear, the second wear-resistant plate is provided with a through hole cooperating with the stabilizing block, and the second wear-resistant plate is provided with two channel holes respectively cooperating with the two oil passages.

[0015] The beneficial effects of the utility model are:

[0016] 1) In this technology, two crescent side plates are provided on the outer side of the crescent plate for compensation, which has a good compensation effect regardless of whether the gears in the pump rotate forward or reverse. At the same time, shrapnel and elastic rods are provided for sealing, so that the sealing effect during the pressurization process is better.

[0017] 2) In this technology, the provision of a stabilizing block can effectively prevent the crescent plate from moving between the driving gear and the driven gear.

[0018] 3) In this technology, the provision of wear-resistant rings and wear-resistant plates can effectively prevent the driving gear and the driven gear from wearing the pump body and the pump cover, and can effectively protect the pump body and the pump cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional connection structure diagram of the crescent plate assembly;

[0020] Figure 2 The diagram is a diagram of the coordination structure between the shrapnel and the crescent plate;

[0021] Figure 3This is a three-dimensional connection structure diagram of an internal gear pump;

[0022] Figure 4 This is the internal connection structure diagram of the internal gear pump;

[0023] Figure 5 The diagram is a diagram of the matching structure between the crescent plate assembly and the driving gear and the driven gear;

[0024] In the figure, 1-crescent plate, 2-crescent side plate, 3-spring sheet, 4-elastic stick, 5-crescent groove, 6-movable groove, 7-drainage groove, 8-drainage slope, 9-anti-collision slope, 10-pump body, 11-pump cover, 12-transmission shaft, 13-driving gear, 14-driven gear, 15-stabilizing block, 16-oil passage, 17-limiting groove, 18-wear-resistant ring, 19-first wear-resistant plate, 20-second wear-resistant plate. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0026] See Figure 1-Figure 5 , the utility model provides a technical solution:

[0027] A separate crescent plate assembly includes a crescent plate 1, crescent side plates 2, a spring clip 3, and an elastic rod 4. A crescent groove 5 is formed on the outer wall of the crescent plate 1. Crescent side plates 2 are provided on either side of the crescent groove 5 to cooperate with the crescent groove 5. A movable groove 6 is provided within the crescent groove 5. The spring clip 3 is provided at the bottom of the movable groove 6. The elastic rod 4 is provided between the spring clip 3 and the crescent side plates 2. The axis of the elastic rod 4, the axis of the crescent groove 5, and the axis of the crescent side plates 2 are all parallel to the axis of the crescent plate 1. The spring clip 3 is arched, with the middle portion of the spring clip 3 protruding toward the elastic rod 4. The two crescent side plates 2 provided on the crescent plate 1 ensure that, regardless of forward or reverse rotation of the driving gear 13 and the driven gear 14, there is always a crescent side plate 2 to compensate. The spring clip 3 and the elastic rod 4 cooperate to provide a better seal between the crescent plate 1 and the crescent side plates 2 during operation. The elastic roller 4 is an elastic rubber roller in the prior art.

[0028] In some embodiments, the ends of the crescent plate 1 are flush with the ends of the crescent side plates 2, and the ends of the elastic rod 4 are flush with the ends of the crescent side plates 2. The two crescent side plates 2 are symmetrically arranged. The flush ends of the crescent plate 1, crescent side plates 2, and elastic rod 4 can reduce liquid leakage during operation. The symmetrical arrangement of the two side plates 2 facilitates forward and reverse rotation of the driving gear 13 and the driven gear 14.

[0029] In some embodiments, drainage grooves 7 are provided at both ends of the crescent groove 5 to cooperate with the crescent side plates 2, and drainage slopes 8 are provided at the four corners of the crescent side plates 2 to cooperate with the drainage grooves 7. A first drainage channel is formed between the drainage slopes 8 and the crescent groove 5 on the crescent plate 1, and a second drainage channel is formed between the drainage grooves 7 and the crescent side plates 2. Liquid enters the movable groove 6 through the first and second drainage channels, and then squeezes the elastic rod 4, which improves the seal between the elastic rod 4, the crescent plate 1, and the crescent side plates 2.

[0030] In some embodiments, anti-collision bevels 9 are provided on both sides of the outer wall of the crescent side plate 2. The function of the anti-collision bevels 9 is to ensure that the driven gear 14 will not be stuck by the crescent side plate 2 during forward or reverse rotation.

[0031] An internal gear pump includes a pump body 10, a pump cover 11, a transmission shaft 12, a driving gear 13, a driven gear 14, a stabilizing block 15 and a separate crescent plate assembly. The pump cover 11 is sealed and fixedly arranged on the pump body 10. A pump chamber that cooperates with the driven gear 14 is provided in the pump body 10. The driving gear 13 is rotatably arranged in the driven gear 14 and meshes with the driven gear 14. The transmission shaft 12 is sealed and arranged on the pump body 10 and fixedly connected to the driving gear 13. The inner wall of the crescent plate 1 cooperates with the driving gear 13, and the outer wall of the crescent side plate 2 cooperates with the driven gear 14. One end of the stabilizing block 15 is arranged on the crescent plate 1, and the other end of the stabilizing block 15 is arranged on the pump cover 11. Two oil passages 16 are provided on the pump cover 11, and the two oil passages 16 are respectively connected to the two end sides of the crescent plate 1. Among them, one end of the transmission shaft 12 is used to connect to the motor, and the other end passes through the pump body 10 and is fixedly connected to the driving gear 13. The driving gear 13 rotates with the driven gear 14, and the liquid can be pressurized under the action of the crescent assembly. Between the driving gear 13 and the driven gear 14, one end side of the crescent assembly is a low-pressure chamber, and the other end side is a high-pressure chamber. The low-pressure chamber cooperates with an oil passage 16, and the high-pressure chamber cooperates with another oil passage 16. The liquid enters the low-pressure chamber through the oil passage 16, enters the high-pressure chamber after being pressurized by the driving gear 13 and the driven gear 14, and is then discharged from the oil passage 16 corresponding to the high-pressure chamber. The function of the stabilizing block 15 is to prevent the crescent assembly from rotating during the rotation of the driving gear 13 and the driven gear 14.

[0032] In some embodiments, a stopper groove 17 is provided in the middle of the crescent plate 1 to engage with the end of the stabilizing block 15. The stopper groove 17 facilitates the installation of the stabilizing block 15. Under the action of the stabilizing block 15, the crescent plate 1 will not move under the action of the driven gear 13 and the driven gear 14.

[0033] In some embodiments, a wear-resistant ring 18 is provided between the side wall of the pump chamber and the outer wall of the driven gear 14. A first wear-resistant plate 19 is provided between the driven gear 14 and the bottom of the pump chamber. A second wear-resistant plate 20 is provided between the pump cover 11 and the driven gear 14. The second wear-resistant plate 20 is provided with a through hole that cooperates with the stabilizing block 15. The second wear-resistant plate 20 is provided with two channel holes that respectively cooperate with the two oil passages 16. During operation, the driving gear 13 and the driven gear 14 both rotate. In order to prevent the rotation of the driving gear 13 and the driven gear 14 from causing wear on the pump body 10 and the pump cover 11, a wear-resistant ring 18 is provided between the driven gear 14 and the side wall of the pump chamber, a first wear-resistant plate 19 is provided on the bottom of the pump chamber, and a second wear-resistant plate 20 is provided between the pump cover 11 and the driven gear 14. The second wear-resistant plate 20 is provided with two channel holes, and the two channel holes are provided correspondingly to the two oil passages 16.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "one end", "top", "middle", "the other end", "coaxial", "one side", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the present invention, unless otherwise clearly stipulated and limited, the terms "setting", "installation", "connection", "fixation", "hinge" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0036] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A separate crescent plate assembly, characterized by: The invention comprises a crescent plate (1), a crescent side plate (2), a spring piece (3) and an elastic rod (4); a crescent groove (5) is provided on the outer wall of the crescent plate (1); the crescent side plates (2) matched with the crescent groove (5) are provided on both sides of the crescent groove (5); a movable groove (6) is provided in the crescent groove (5); the spring piece (3) is provided on the bottom of the movable groove (6); the elastic rod (4) is provided between the spring piece (3) and the crescent side plate (2); the axis of the elastic rod (4), the axis of the crescent groove (5) and the axis of the crescent side plate (2) are all arranged parallel to the axis of the crescent plate (1).

2. The detachable crescent plate assembly according to claim 1, characterized in that: The two ends of the crescent plate (1) are flush with the two ends of the crescent side plate (2), the two ends of the elastic rod (4) are flush with the two ends of the crescent side plate (2), and the two crescent side plates (2) are symmetrically arranged.

3. The detachable crescent plate assembly according to claim 1, characterized in that: Both ends of the crescent groove (5) are provided with drainage grooves (7) that cooperate with the crescent side plate (2), and the four corners of the crescent side plate (2) are provided with drainage slopes (8) that cooperate with the drainage grooves (7).

4. The detachable crescent plate assembly according to claim 1, characterized in that: Anti-collision inclined surfaces (9) are provided on both sides of the outer wall of the crescent side plate (2).

5. The detachable crescent plate assembly according to claim 1, characterized in that: The spring piece (3) is arranged in a bow shape, and the middle part of the spring piece (3) is arranged to protrude toward the elastic rod (4).

6. An internal gear pump, characterized in that: The invention comprises a pump body (10), a pump cover (11), a transmission shaft (12), a driving gear (13), a driven gear (14), a stabilizing block (15) and a separate crescent plate assembly as described in any one of claims 1 to 5, wherein the pump cover (11) is sealed and fixedly arranged on the pump body (10), a pump cavity matched with the driven gear (14) is provided in the pump body (10), the driving gear (13) is rotatably arranged in the driven gear (14) and meshed with the driven gear (14), and the transmission shaft (12) is sealed and fixedly arranged on the pump body (10), and a pump cavity matched with the driven gear (14) is provided in the pump body (10), and the driving gear (13) is rotatably arranged in the driven gear (14) and meshed with the driven gear (14). The stabilizing block (15) is arranged on the pump body (10) and is fixedly connected to the driving gear (13). The inner wall of the crescent plate (1) cooperates with the driving gear (13), and the outer wall of the crescent side plate (2) cooperates with the driven gear (14). One end of the stabilizing block (15) is arranged on the crescent plate (1), and the other end of the stabilizing block (15) is arranged on the pump cover (11). Two oil passages (16) are provided on the pump cover (11), and the two oil passages (16) are respectively connected to the two end sides of the crescent plate (1).

7. The internal gear pump according to claim 6, characterized in that: A limiting groove (17) is provided on the middle portion of the crescent plate (1) and is matched with the end portion of the stabilizing block (15).

8. The internal gear pump according to claim 6, characterized in that: A wear-resistant ring (18) is provided between the side wall of the pump chamber and the outer wall of the driven gear (14).

9. The internal gear pump according to claim 6, characterized in that: A first wear-resistant plate (19) is provided between the driven gear (14) and the bottom of the pump chamber.

10. The internal gear pump according to claim 6, characterized in that: A second wear-resistant plate (20) is provided between the pump cover (11) and the driven gear (14), and a through hole is provided on the second wear-resistant plate (20) for cooperating with the stabilizing block (15). The second wear-resistant plate (20) is provided with two channel holes respectively cooperating with the two oil passages (16).

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