Gear hydraulic pump

Abstract

The utility model discloses a gear hydraulic pump which comprises a rear cover and a gear pump mechanism arranged on the outer wall of the rear cover, and the gear pump mechanism comprises a hydraulic pump assembly, an oil inlet and outlet assembly and a sealing assembly. The hydraulic pump assembly comprises a mounting plate, a working motor, a driving gear, a shell and a driven gear, the mounting plate is fixedly connected to the bottom end of the rear cover, the working motor is fixedly connected to the top end of the mounting plate, and the driving gear is mounted at the output end of the working motor; a shell in bolted connection with the outer wall of the rear cover is attached to the outer portion of the driving gear, and a driven gear is meshed with the meshing face of the driving gear. The oil stop ring is arranged, the rear cover, the shell and the front cover are subjected to sealing installation operation, a worker embeds the oil stop ring on the outer wall of the front cover into one end of the shell, and sealing operation on the two sides of the oil stop ring is achieved by arranging the four sets of sealing rings. And leakage of hydraulic oil is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gear hydraulic pumps, in particular to a gear hydraulic pump. Background Art

[0002] A gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquid or increase its pressure. It consists of two gears, a pump body, and front and rear covers to form two closed spaces. When the gears rotate, the volume of the space on the side where the gears are disengaged changes from small to large, forming a vacuum, sucking in the liquid, and the volume of the space on the side where the gears are meshing changes from large to small, squeezing the liquid into the pipeline.

[0003] When the existing gear hydraulic pump is in use, the rear cover, the housing and the front cover are connected by bolts, and sealing gaskets are placed between the rear cover, the front cover and the housing. However, when the oil pressure is high, the hydraulic oil at both ends of the housing is prone to leakage, which does not meet people's usage needs. Therefore, a gear hydraulic pump is needed. Utility Model Content

[0004] In order to solve the defect of poor sealing between the rear cover, the housing and the front cover in the prior art, the utility model provides a gear hydraulic pump.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] The utility model discloses a gear hydraulic pump, comprising a rear cover and a gear pump mechanism arranged on the outer wall of the rear cover, wherein the gear pump mechanism comprises a hydraulic pump assembly, an oil inlet and outlet assembly and a sealing assembly;

[0007] The hydraulic pump assembly includes a mounting plate, a working motor, a driving gear, a housing and a driven gear. The bottom end of the rear cover is fixedly connected to the mounting plate, the top end of the mounting plate is fixedly connected to the working motor, the output end of the working motor is mounted with a driving gear, the outside of the driving gear is attached with a housing bolted to the outer wall of the rear cover, and the meshing surface of the driving gear is meshed with the driven gear;

[0008] The oil inlet and outlet assembly comprises an overflow groove, an oil inlet flange and an oil outlet flange. The outer wall of the rear cover is located on the inner wall of the shell and is provided with an overflow groove. The outer wall of the shell is provided with an oil inlet flange. The outer wall of the shell away from the oil inlet flange is provided with an oil outlet flange.

[0009] The sealing assembly includes a front cover, an oil stop ring and a sealing ring. The front cover is bolted to one end of the shell away from the rear cover. The connecting portion between the shell and the front cover is provided with an oil stop ring. The connecting portion between the oil stop ring and the front cover is provided with a sealing ring.

[0010] As a preferred technical solution of the utility model, a shock-absorbing column is penetrated through the outer wall of the mounting plate, an upper shock-absorbing plate is provided at the connection position between the shock-absorbing column and the top end of the mounting plate, a lower shock-absorbing plate is provided at the connection position between the shock-absorbing column and the bottom end of the mounting plate, a mounting bolt is penetrated through the inner wall of the shock-absorbing column, and the bottom end of the mounting bolt is threadedly connected to a mounting base that fits with the bottom end of the shock-absorbing column.

[0011] As a preferred technical solution of the utility model, the driving gear and the driven gear have the same gear size, and the driving gear and the driven gear are both in contact with the inner wall of the housing.

[0012] As a preferred technical solution of the utility model, four groups of sealing rings are provided, and the four groups of sealing rings are equidistantly distributed along both sides of the oil stop ring.

[0013] As a preferred technical solution of the utility model, the connection structure between the front cover and the shell is the same as the connection structure between the rear cover and the shell.

[0014] As a preferred technical solution of the utility model, the mounting plate is fixedly connected to the mounting base through shock-absorbing columns and mounting bolts.

[0015] As a preferred technical solution of the utility model, the outer walls of the upper and lower shock absorbing plates are both toothed ring-shaped, and the connection parts between the upper and lower shock absorbing plates and the shock absorbing columns are both toothed ring-shaped.

[0016] The utility model has the following beneficial effects:

[0017] 1. By setting the oil stop ring, when sealing and installing the rear cover, housing and front cover, the staff will embed the oil stop ring on the outer wall of the front cover into one end of the housing. By setting four sets of sealing rings, the sealing operation on both sides of the oil stop ring is realized to reduce the leakage of hydraulic oil;

[0018] 2. By setting the upper shock-absorbing plate and the lower shock-absorbing plate, the staff will pass the shock-absorbing column through the mounting hole on the mounting plate so that the shock-absorbing column fits with the upper shock-absorbing plate and the lower shock-absorbing plate on both sides of the mounting plate, and the upper shock-absorbing plate and the lower shock-absorbing plate have a toothed ring shape to prevent the mounting bolts from loosening when the working motor is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a gear hydraulic pump of the utility model;

[0021] Figure 2 This is a schematic diagram of the overall cross-sectional structure of a gear hydraulic pump of the utility model;

[0022] Figure 3 This is a schematic diagram of the meshing structure of a driving gear and a driven gear of a gear hydraulic pump of the utility model;

[0023] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 The utility model is a schematic diagram of the cross-sectional structure of a shock absorbing column of a gear hydraulic pump.

[0025] In the figure: 1. rear cover; 2. mounting plate; 3. working motor; 4. driving gear; 5. housing; 6. driven gear; 7. overflow groove; 8. oil inlet flange; 9. oil outlet flange; 10. front cover; 11. oil stop ring; 12. sealing ring; 13. shock-absorbing column; 14. upper shock-absorbing plate; 15. lower shock-absorbing plate; 16. mounting bolts; 17. mounting base. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] Example: Figure 1-5 As shown, the utility model is a gear hydraulic pump, comprising a rear cover 1 and a gear pump mechanism arranged on the outer wall of the rear cover 1, wherein the gear pump mechanism comprises a hydraulic pump assembly, an oil inlet and outlet assembly and a sealing assembly;

[0028] The hydraulic pump assembly includes a mounting plate 2, a working motor 3, a driving gear 4, a housing 5 and a driven gear 6. The bottom end of the rear cover 1 is fixedly connected with the mounting plate 2, the top end of the mounting plate 2 is fixedly connected with the working motor 3, the output end of the working motor 3 is installed with the driving gear 4, the outer part of the driving gear 4 is attached with the housing 5 connected with the outer wall of the rear cover 1 by bolts, and the meshing surface of the driving gear 4 is meshed with the driven gear 6;

[0029] The oil inlet and outlet assembly includes an overflow groove 7, an oil inlet flange 8 and an oil outlet flange 9. The outer wall of the rear cover 1 is located on the inner wall of the housing 5 and is provided with an overflow groove 7. The outer wall of the housing 5 is provided with an oil inlet flange 8. The outer wall of the housing 5 away from the oil inlet flange 8 is provided with an oil outlet flange 9.

[0030] The sealing assembly includes a front cover 10, an oil stop ring 11 and a sealing ring 12. The front cover 10 is bolted to one end of the housing 5 away from the rear cover 1. The connecting portion between the housing 5 and the front cover 10 is provided with an oil stop ring 11, and the connecting portion between the oil stop ring 11 and the front cover 10 is provided with a sealing ring 12.

[0031] Among them, a shock-absorbing column 13 is penetrated through the outer wall of the mounting plate 2, an upper shock-absorbing plate 14 is provided at the connection position between the shock-absorbing column 13 and the top of the mounting plate 2, a lower shock-absorbing plate 15 is provided at the connection position between the shock-absorbing column 13 and the bottom of the mounting plate 2, a mounting bolt 16 is penetrated through the inner wall of the shock-absorbing column 13, and the bottom end of the mounting bolt 16 is threadedly connected to a mounting base 17 which fits with the bottom end of the shock-absorbing column 13. When working, the staff passes the shock-absorbing column 13 through the mounting hole on the mounting plate 2 so that the shock-absorbing column 13 fits with the upper shock-absorbing plate 14 and the lower shock-absorbing plate 15 on both sides of the mounting plate 2. By providing the toothed upper shock-absorbing plate 14 and the lower shock-absorbing plate 15, the mounting bolt 16 is prevented from loosening when the working motor 3 is working.

[0032] Among them, the gear sizes of the driving gear 4 and the driven gear 6 are the same, and the driving gear 4 and the driven gear 6 are both in contact with the inner wall of the housing 5. When working, the driving gear 4 rotates to drive the driven gear 6 to rotate. When the driving gear 4 and the driven gear 6 are engaged, the volume of the inside of the housing 5 on one side of the oil inlet flange 8 becomes larger, generating negative pressure, so that the driving gear 4 and the driven gear 6 drive the hydraulic oil to rotate along the inner wall of the housing 5, accelerating the hydraulic oil to flow into the oil outlet flange 9, thereby realizing the pumping operation of the gear hydraulic pump.

[0033] Among them, four groups of sealing rings 12 are arranged, and the four groups of sealing rings 12 are evenly distributed along both sides of the oil stop ring 11. When working, by setting four groups of sealing rings 12, it is beneficial to realize the sealing operation on both sides of the oil stop ring 11 and reduce the leakage of hydraulic oil.

[0034] The connection structure between the front cover 10 and the shell 5 is the same as the connection structure between the rear cover 1 and the shell 5 , which is beneficial to the sealing operation of the front cover 10 , the rear cover 1 and the shell 5 during operation.

[0035] Among them, the mounting plate 2 is fixedly connected to the mounting base 17 through the shock-absorbing column 13 and the mounting bolt 16. During operation, the staff rotates the mounting bolt 16 to make the mounting plate 2 fit tightly with the mounting base 17 through the shock-absorbing column 13, thereby realizing the control operation of the shock absorption of the mounting plate 2.

[0036] Among them, the outer walls of the upper shock-absorbing plate 14 and the lower shock-absorbing plate 15 are both in the shape of toothed rings, and the connection parts between the upper shock-absorbing plate 14 and the lower shock-absorbing plate 15 and the shock-absorbing column 13 are both arranged in the shape of toothed rings. When working, by setting the toothed ring-shaped upper shock-absorbing plate 14 and the lower shock-absorbing plate 15, the mounting bolts 16 are prevented from loosening when the working motor 3 is working.

[0037] During operation, first, the rear cover 1, the shell 5 and the front cover 10 are sealed and installed. The staff embeds the oil stop ring 11 on the outer wall of the front cover 10 into one end of the shell 5. By setting four sets of sealing rings 12, the sealing operation on both sides of the oil stop ring 11 is realized to reduce the leakage of hydraulic oil. Similarly, the front cover 10 is also connected to the shell 5 in the same way.

[0038] Next, the mounting plate 2 is stably installed and the staff passes the shock-absorbing column 13 through the mounting hole on the mounting plate 2 so that the shock-absorbing column 13 fits with the upper shock-absorbing plate 14 and the lower shock-absorbing plate 15 on both sides of the mounting plate 2. By providing the toothed upper shock-absorbing plate 14 and the lower shock-absorbing plate 15, the mounting bolts 16 are prevented from loosening when the working motor 3 is working.

[0039] Finally, the working motor 3 drives the driving gear 4 to rotate, and the driving gear 4 rotates by driving the driven gear 6. When the driving gear 4 and the driven gear 6 are engaged, the volume of the inside of the shell 5 on one side of the oil inlet flange 8 becomes larger, generating negative pressure, so that the driving gear 4 and the driven gear 6 drive the hydraulic oil to rotate along the inner wall of the shell 5, accelerating the hydraulic oil to flow into the oil outlet flange 9, thereby realizing the pumping operation of the gear hydraulic pump.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A gear hydraulic pump, comprising a rear cover (1) and a gear pump mechanism arranged on the outer wall of the rear cover (1), characterized in that: The gear pump mechanism includes a hydraulic pump assembly, an oil inlet and outlet assembly, and a sealing assembly; The hydraulic pump assembly comprises a mounting plate (2), a working motor (3), a driving gear (4), a housing (5) and a driven gear (6); the bottom end of the rear cover (1) is fixedly connected to the mounting plate (2); the top end of the mounting plate (2) is fixedly connected to the working motor (3); the output end of the working motor (3) is mounted with a driving gear (4); the outside of the driving gear (4) is attached with a housing (5) bolted to the outer wall of the rear cover (1); and the meshing surface of the driving gear (4) is meshed with the driven gear (6); The oil inlet and outlet assembly comprises an overflow groove (7), an oil inlet flange (8) and an oil outlet flange (9); the outer wall of the rear cover (1) is located on the inner wall of the shell (5) and is provided with an overflow groove (7); the outer wall of the shell (5) is provided with an oil inlet flange (8); and the outer wall of the shell (5) away from the oil inlet flange (8) is provided with an oil outlet flange (9); The sealing assembly comprises a front cover (10), an oil stop ring (11) and a sealing ring (12); the end of the housing (5) away from the rear cover (1) is bolted to the front cover (10); the connecting portion of the housing (5) and the front cover (10) is provided with an oil stop ring (11); and the connecting portion of the oil stop ring (11) and the front cover (10) is provided with a sealing ring (12).

2. A gear hydraulic pump according to claim 1, characterized in that: A shock absorbing column (13) is passed through the outer wall of the mounting plate (2); an upper shock absorbing plate (14) is provided at the connection position between the shock absorbing column (13) and the top end of the mounting plate (2); a lower shock absorbing plate (15) is provided at the connection position between the shock absorbing column (13) and the bottom end of the mounting plate (2); a mounting bolt (16) is passed through the inner wall of the shock absorbing column (13); the bottom end of the mounting bolt (16) is threadedly connected to a mounting base (17) that fits the bottom end of the shock absorbing column (13).

3. A gear hydraulic pump according to claim 1, characterized in that: The driving gear (4) and the driven gear (6) have the same gear size, and both the driving gear (4) and the driven gear (6) fit closely to the inner wall of the housing (5).

4. A gear hydraulic pump according to claim 1, characterized in that: Four groups of sealing rings (12) are provided, and the four groups of sealing rings (12) are distributed at equal distances along both sides of the oil stop ring (11).

5. The gear hydraulic pump according to claim 1, characterized in that: The connection structure between the front cover (10) and the housing (5) is the same as the connection structure between the rear cover (1) and the housing (5).

6. A gear hydraulic pump according to claim 2, characterized in that: The mounting plate (2) is fixedly connected to the mounting base (17) via a shock-absorbing column (13) and mounting bolts (16).

7. A gear hydraulic pump according to claim 2, characterized in that: The outer walls of the upper shock absorbing plate (14) and the lower shock absorbing plate (15) are both in the shape of toothed rings, and the connection parts between the upper shock absorbing plate (14) and the lower shock absorbing plate (15) and the shock absorbing column (13) are both in the shape of toothed rings.

Images