CN215487576U

CN215487576U - Lubricating oil pump for gear box of wheel excavator

Info

Publication number: CN215487576U
Application number: CN202121329603.8U
Authority: CN
Inventors: 王金铂; 刘志才; 刘晓; 李卫; 吴汉彪
Original assignee: Hengda Transmission Yucheng Co ltd
Current assignee: Hengda Transmission Yucheng Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-01-11
Anticipated expiration: 2031-06-16

Abstract

The utility model relates to a lubricating oil pump, in particular to a lubricating oil pump for a gearbox of a wheel excavator. The lubricating oil pump for the gear box of the wheel type excavator comprises a shell and is characterized in that: the cycloidal rotor pump is installed on the shell and comprises a pump shell and a pump cover, an inner rotor and an outer rotor are installed in an eccentric hole in one end of the pump shell, a limiting column is arranged at the other end of the pump shell and matched with a limiting groove in the pump cover, and a mandrel penetrates through a central circular hole in the pump cover. The utility model has the beneficial effects that: when the gearbox rotates forwards and backwards, oil can be continuously discharged without changing the oil inlet and the oil outlet, and sufficient lubricating pressure is ensured; no additional power for the lubricating oil pump is required; compact structure and convenient installation.

Description

Lubricating oil pump for gear box of wheel excavator

(I) technical field

The utility model relates to a lubricating oil pump, in particular to a lubricating oil pump for a gearbox of a wheel excavator.

(II) background of the utility model

On a wheel type excavator, a gearbox needs to be operated in a forward and reverse rotation mode frequently, but when a main shaft rotates reversely, a lubricating oil pump is required to continuously discharge oil without changing an oil inlet and an oil outlet, sufficient lubricating pressure is guaranteed, and normal lubrication is provided for the gearbox.

Disclosure of the utility model

In order to make up for the defects of the prior art, the utility model provides the lubricating oil pump for the gear box of the wheel excavator, which has the advantages of compact structure, convenience in disassembly and assembly, high lubricating pressure and capability of continuously discharging oil without changing an oil inlet and an oil outlet when the gear box rotates reversely.

The utility model is realized by the following technical scheme:

the utility model provides a lubricated oil pump for wheeled excavator gearbox, includes the casing, characterized by: the cycloidal rotor pump is installed on the shell and comprises a pump shell and a pump cover, an inner rotor and an outer rotor are installed in an eccentric hole in one end of the pump shell, a limiting column is arranged at the other end of the pump shell and matched with a limiting groove in the pump cover, and a mandrel penetrates through a central circular hole in the pump cover.

And a spring arranged in the blind hole of the pump cover is arranged between the pump shell and the pump cover.

And a steel ball is arranged between the inner rotor and the mandrel.

The mandrel is provided with a deep groove ball bearing, and the deep groove ball bearing is fixed on the pump cover through a hole by an elastic retainer ring.

And an elastic check ring for the shaft is fixed between the pump cover and the mandrel.

And a check valve, an overflow valve and a downshift interlocking valve are respectively arranged in the valve hole of the shell.

And a rear cover is arranged at the rear part of the shell.

The utility model has the beneficial effects that: when the gearbox rotates forwards and backwards, oil can be continuously discharged without changing the oil inlet and the oil outlet, and sufficient lubricating pressure is ensured; the internal spline of the lubricating oil pump is directly connected with the external spline of the input shaft of the gearbox, so that the power of the lubricating oil pump is not required to be provided additionally, the structure is compact, and the installation is convenient; a gear shifting interlocking device of the gearbox, which consists of a one-way valve and a downshifting interlocking valve, is arranged on the lubricating oil pump, so that the power gear shifting action of the gearbox can be realized.

(IV) description of the drawings

The utility model will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic view of the gerotor pump construction of the present invention;

in the figure, a shell 1, a cycloid rotor pump 2, a pump shell 3, a pump cover 4, an inner rotor 5, an outer rotor 6, a limiting column 7, a limiting groove 8, a core shaft 9, a spring 10, a steel ball 11, a deep groove ball bearing 12, an elastic retainer ring for 13 holes, an elastic retainer ring for 14 shafts, a check valve 15, an overflow valve 16, a downshift interlocking valve 17 and a rear cover 18 are shown.

(V) detailed description of the preferred embodiments

The attached drawing is an embodiment of the utility model. This embodiment includes casing 1, and installation cycloid impeller pump 2 on the casing 1, cycloid impeller pump 2 include pump case 3 and pump cover 4, and the eccentric downthehole inner rotor 5 and the outer rotor 6 of installing of 3 one ends of pump case, the 3 other ends of pump case are equipped with spacing post 7, and spacing post 7 cooperatees with the spacing groove 8 of pump cover 4, wears to establish dabber 9 in the central round hole of pump cover 4. A spring 10 arranged in a blind hole of the pump cover 4 is arranged between the pump shell 3 and the pump cover 4. A steel ball 11 is arranged between the inner rotor 5 and the mandrel 9. The mandrel 9 is provided with a deep groove ball bearing 12, and the deep groove ball bearing 12 is fixed on the pump cover 4 through a hole by an elastic retainer ring 13. A shaft circlip 14 is fixed between the pump cover 4 and the mandrel 9. A check valve 15, a relief valve 16 and a downshift interlock valve 17 are installed in the valve holes of the housing 1, respectively. A rear cover 18 is mounted to the rear of the housing 1.

The lubricating oil pump for the gear box of the wheel excavator is adopted, the core shaft 9 penetrates through a central circular hole of the pump cover 4 and is fixedly arranged on the pump cover 4 through the elastic retaining ring 14 for a shaft, the deep groove ball bearing 12 is arranged between the core shaft 9 and the pump cover 4, the using hole is fixed on the pump cover 4 through the elastic retaining ring 13, the pump shell 3 is of a cylindrical structure, one end of the pump shell is provided with an eccentric inner hole, the other end of the pump shell is provided with the raised arc-shaped limiting column 7, the pump cover 4 is provided with the limiting groove 8 and is matched with the arc-shaped limiting column 7 of the pump shell 3, the spring 10 is arranged between the pump shell 3 and the pump cover 4 and is arranged in a blind hole of the pump cover 4, the inner rotor 5 and the outer rotor 6 are arranged in the eccentric hole of the pump shell 3, the steel ball 11 is arranged between the inner rotor 5 and the core shaft 9 and is matched as a key, the cycloid rotor pump 2 is arranged on the shell 1, and the needle roller bearing is arranged between the core shaft 9 and the shell 1 of the cycloid rotor pump 2. A filter screen is arranged in the oil suction cavity of the shell 1, and a rear cover 18 is fixed on the shell 1 through bolts. The lubricating oil pump is connected with an input shaft spline of the gearbox through a spline of the mandrel 9 to provide power for the lubricating oil pump; two closed spaces are formed by the outer rotor 6, the inner rotor 5, the shell 1 and the pump shell 3, when the gear rotates, the space volume of the gear disengagement side is changed from small to large to form vacuum, lubricating oil is sucked in, the space volume of the gear engagement side is changed from large to small, and the lubricating oil is squeezed into an oil discharge port; when the pump shell rotates reversely, the limiting column 7 of the pump shell 3 rotates to the other side of the pump cover 4, the oil suction position and the oil discharge position of the inner rotor 5 and the outer rotor 6 are exchanged, but the oil suction port and the oil discharge port on the shell 1 do not need to be changed, and a filter screen is arranged in the oil suction port. The check valve 15, the overflow valve 16 and the downshift interlock valve 17 form a lubricating oil pump gear shifting interlocking mechanism, and power gear shifting of the gearbox is achieved by changing the oil path of hydraulic oil.

Claims

1. The utility model provides a lubricated oil pump for wheeled excavator gearbox, includes casing (1), characterized by: install cycloid impeller pump (2) on casing (1), cycloid impeller pump (2) include pump case (3) and pump cover (4), and eccentric downthehole installation inner rotor (5) and outer rotor (6) of pump case (3) one end, and the pump case (3) other end is equipped with spacing post (7), and spacing post (7) cooperate with spacing groove (8) of pump cover (4), wears to establish dabber (9) in the central round hole of pump cover (4).

2. The lubricating oil pump for a gearbox of a wheeled excavator according to claim 1, wherein: and a spring (10) arranged in a blind hole of the pump cover (4) is arranged between the pump shell (3) and the pump cover (4).

3. The lubricating oil pump for a gearbox of a wheeled excavator according to claim 1, wherein: and a steel ball (11) is arranged between the inner rotor (5) and the mandrel (9).

4. The lubricating oil pump for a gearbox of a wheeled excavator according to claim 1, wherein: the core shaft (9) is provided with a deep groove ball bearing (12), and the deep groove ball bearing (12) is fixed on the pump cover (4) through an elastic retainer ring (13) for a hole.

5. The lubricating oil pump for a gearbox of a wheeled excavator according to claim 1, wherein: an elastic check ring (14) for the shaft is fixed between the pump cover (4) and the mandrel (9).

6. The lubricating oil pump for a gearbox of a wheeled excavator according to claim 1, wherein: a check valve (15), an overflow valve (16) and a downshifting interlocking valve (17) are respectively arranged in a valve hole of the shell (1).

7. The lubricating oil pump for a gearbox of a wheeled excavator according to claim 1, wherein: the rear part of the shell (1) is provided with a rear cover (18).