Electric gear pump with compact structure

Abstract

The utility model relates to an electric gear pump with a compact structure, which comprises a rectangular lower oil tank, the upper end of the lower oil tank is fixedly connected with a mounting cover plate, one side of the mounting cover plate is fixedly inserted with a motor mounting seat, and the motor mounting seat is fixedly connected with a vertical motor. The lower part of the motor mounting seat is inserted into the lower oil tank and is provided with a connecting bracket with a semicircular horizontal section, a notch of the connecting bracket faces forwards and is inserted with a vertical transmission shaft, a gear pump shell seat is formed at the lower end of the connecting bracket, and a gear pump is mounted in the gear pump shell seat; the lower end of the transmission shaft is connected with the gear pump, and the upper end is fixedly connected with a rotating shaft of the motor; an oil outlet channel connected with an output port of the gear pump is formed in the outer wall of the lower portion of the connecting support. An oil supply structure on the lower portion of the electric gear pump is optimized and improved, the structure is simple and compact, and meanwhile the problems that transmission shaft installation is not changed and oil leaks from the upper portion of the transmission shaft are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lubricating pump, more particularly to a compact structure's electric gear pump. BACKGROUND

[0002] In the quantitative centralized lubrication system, the electric lubricating pump is used as the pump source of providing pressure lubricating oil. The structure of the existing electric lubricating pump includes an oil tank, a motor mounting seat, a motor, a gear pump, a transmission shaft, a pipe column, an adjusting valve and a safety valve and the like. The motor is mounted on the motor mounting seat, the lower end of the motor mounting seat is fixedly connected with the pipe column, the lower end of the pipe column is fixedly connected with the gear pump, the transmission shaft is inserted into the pipe column to realize the connection between the motor and the gear pump, and the adjusting valve and the safety valve and the like are mounted on the pipe column and are in communication with the inner hole of the pipe column. Therefore, the inner hole of the pipe column is used as the oil supply pipeline, the lubricating oil delivered in the oil supply pipeline has a certain oil pressure, the oil pressure will affect the sealing of the upper part of the transmission shaft, resulting in oil leakage, and the installation and connection of the transmission shaft in the pipe column are relatively inconvenient. Therefore, the delivery structure of the gear pump needs to be optimized and reformed to facilitate assembly and reduce oil leakage. SUMMARY

[0003] The utility model discloses a compact structure's electric gear pump, and the oil supply structure of the lower part of the electric gear pump is optimized, the structure is simple and compact, and the problems of inconvenient installation of the transmission shaft and oil leakage in the upper part of the transmission shaft are solved.

[0004] A compact structure's electric gear pump, including the rectangular lower oil tank, the upper end of lower oil tank is fixedly connected with the installation cover plate, the side of installation cover plate is insertedly connected with the motor mounting seat, the motor mounting seat is fixedly connected with the vertical motor, the lower part of motor mounting seat is inserted in lower oil tank and is formed with the horizontal section of annular half ring's link support, the notch of link support faces forward and is inserted with the vertical transmission shaft, the lower end of link support is formed with the gear pump shell seat, the gear pump is installed in the gear pump shell seat, the lower end of transmission shaft is connected with the gear pump, and the upper end is fixedly connected with the rotating shaft of motor;

[0005] The lower outer wall of the connecting bracket is formed with an oil outlet channel connected to the gear pump output port. A front connecting seat, which is connected to the oil outlet channel and is transversely oriented, is fixed to the middle of the connecting bracket. A safety valve is screwed to the left end of the front connecting seat. A longitudinal rear connecting seat is formed on the rear outer wall of the connecting bracket. A valve hole is formed on the rear end face of the rear connecting seat. A connecting hole connected to the oil outlet channel is formed at the bottom of the valve hole. A pressure regulating valve is screwed into the valve hole of the rear connecting seat. The pressure regulating valve includes an adjusting head. A cylindrical connecting post is formed at the front end of the adjusting head. A compression spring is inserted into the connecting post. The front end of the compression spring is inserted into and pressed against the umbrella valve. The outer ring of the umbrella valve is pressed against the inner wall of the valve hole, and the front end is inserted into the positioning sleeve. The positioning sleeve is inserted and fixed in the valve hole and communicates with the connecting hole. Pressure measuring tube and oil supply tube communicating with the valve hole are respectively inserted and fixed on the rear connecting seats on both sides of the positioning sleeve. The end of the oil supply tube passes through the mounting cover plate and is fixed to the oil outlet seat. A pressure gauge is screwed and fixed on the upper end face of the oil outlet seat, and a rotary joint is screwed and fixed on the side end face. The upper end of the pressure measuring tube passes through the mounting cover plate and is fixed to the pressure sensor. The oil outlet seat is fixed to the mounting cover plate.

[0006] The motor, oil outlet connector, pressure gauge and pressure sensor are fitted with protective covers. A horizontal connecting plate is formed on the lower part of one side of the protective cover. The connecting plate abuts against the upper surface of the mounting cover and is fixedly connected to the oil filling port. The lower part of the oil filling port is inserted into the lower oil tank. The protective cover is fixed to the mounting cover by screws.

[0007] Preferably, a cap is screwed onto the refueling port, and an anti-loss chain is fixed to the cap. The end of the anti-loss chain is fixed to the connecting plate of the protective cover.

[0008] Preferably, the connecting plate is located on the front side of the oil outlet connector, and a circular observation hole is formed on the front end face of the protective cover on the rear side of the connecting plate. The front part of the pressure gauge housing is inserted into the observation hole of the protective cover.

[0009] Preferably, the central axis of the drive shaft, the central axis of the motor, and the central axis of the connecting bracket are on the same straight line, and the diameter of the drive shaft is smaller than the diameter of the inner wall of the connecting bracket.

[0010] Preferably, a vertical float-type liquid level sensor is inserted into the lower oil tank, and the upper end of the float-type liquid level sensor is inserted and fixed to the mounting cover plate and located inside the protective cover.

[0011] Preferably, the rear side of the mounting cover extends out of the protective cover and is bent into a vertical folded plate, and a plurality of mounting holes are formed on the folded plate.

[0012] The beneficial effects of this utility model are as follows:

[0013] The oil supply structure of the lower part of the electric gear pump is optimized and improved, which is simple and compact, and solves the problems of transmission shaft installation and oil leakage on the upper part of the transmission shaft. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a three-dimensional structure schematic view of the utility model;

[0015] Fig. 2 It is a front view structure schematic view of the utility model without protective cover;

[0016] Fig. 3 It is a three-dimensional structure schematic view of the utility model without lower oil tank;

[0017] Fig. 4 It is a rear view structure schematic view of the utility model without lower oil tank;

[0018] Fig. 5 It is a side view sectional view schematic view of the utility model without lower oil tank.

[0019] In the figure: 1, lower oil tank; 2, installation cover plate; 3, motor mounting seat; 31, connecting support; 32, oil outlet channel; 33, front connecting seat; 34, rear connecting seat; 35, valve hole; 36, communication hole; 4, motor; 5, transmission shaft; 6, gear pump; 7, pressure regulating valve; 71, adjusting head; 72, umbrella valve; 73, compression spring; 8, pressure measuring pipe; 9, oil feeding pipe; 10, safety valve; 11, oil outlet socket; 12, pressure gauge; 13, rotary joint; 14, protective cover; 15, oil filling port; 16, cap; 17, pressure sensor; 18, float type liquid level sensor. DETAILED DESCRIPTION

[0020] Embodiment: see Figs. 1 to 3 As shown in the figure, a compact electric gear pump comprises a rectangular lower oil tank 1, the upper end of the lower oil tank 1 is fixedly connected with an installation cover plate 2, one side of the installation cover plate 2 is fixedly connected with a motor mounting seat 3, the motor mounting seat 3 is fixedly connected with a vertical motor 4, the lower part of the motor mounting seat 3 is inserted into the lower oil tank 1 and is formed with a connecting support 31 with a semicircular ring-shaped horizontal section, the notch of the connecting support 31 faces forward and is inserted with a vertical transmission shaft 5, the lower end of the connecting support 31 is formed with a gear pump housing seat, the gear pump housing seat is installed with a gear pump 6, the lower end of the transmission shaft 5 is connected with the gear pump 6 and the upper end is fixedly connected with the rotating shaft of the motor 4;

[0021] The outer wall of the lower part of the adapter support 31 is formed with an oil outlet channel 32 connected with the outlet of the gear pump 6, the middle part of the adapter support 31 is fixedly connected with a front adapter seat 33 which is transverse and communicated with the oil outlet channel 32, and the left end of the front adapter seat 33 is fixedly screwed with the safety valve 10; the outer wall of the rear side of the adapter support 31 is formed with a rear adapter seat 34 which is longitudinal, the rear end surface of the rear adapter seat 34 is formed with a valve hole 35, and the bottom of the valve hole 35 is formed with a communication hole 36 which is communicated with the oil outlet channel 32; the valve hole 35 of the rear adapter seat 34 is screwed with the pressure regulating valve 7, the pressure regulating valve 7 comprises an adjusting head 71, the front end of the adjusting head 71 is formed with a cylindrical connecting column 711, the connecting column 711 is inserted with a compression spring 73, the front end of the compression spring 73 is inserted into and pressed against the umbrella valve 72, the outer ring of the umbrella valve 72 is pressed against the inner wall of the valve hole 35, the front end is inserted into a positioning sleeve, the positioning sleeve is inserted and fixedly connected in the valve hole 35 and communicated with the communication hole 36, the rear adapter seat 34 on both sides of the positioning sleeve is respectively inserted and fixedly connected with the pressure measuring tube 8 and the oil feeding tube 9 which are communicated with the valve hole 35, the end of the oil feeding tube 9 passes through the mounting cover plate 2 and is fixedly connected with the oil outlet adapter 11, the upper end surface of the oil outlet adapter 11 is fixedly screwed with the pressure gauge 12, and the side end surface is fixedly screwed with the rotary joint 13; the upper end of the pressure measuring tube 8 passes through the mounting cover plate 2 and is fixedly connected with the pressure sensor 17, and the oil outlet adapter 11 is fixedly connected with the mounting cover plate 2.

[0022] The outer side of the motor 4, the oil outlet adapter 11, the pressure gauge 12 and the pressure sensor 17 is sleeved with the protective cover 14, the lower part of one side of the protective cover 14 is formed with a horizontal connecting plate 142 which abuts against the upper end surface of the mounting cover plate 2 and is fixedly connected with the oil filling port 15, the lower part of the oil filling port 15 is inserted into the lower oil tank 1, and the protective cover 14 is fixedly connected with the mounting cover plate 2 by screws; the rotary joint 13 extends out of the side wall of the protective cover 14.

[0023] The cap 16 is screwed with the oil filling port 15, the cap 16 is fixedly connected with an anti-lost chain, and the end of the anti-lost chain is fixedly connected with the connecting plate 142 of the protective cover 14, the cap 16 is convenient to open, and the oil filling into the lower oil tank 1 is facilitated.

[0024] The connecting plate 142 is located in front of the oil outlet adapter 11, the front end surface of the protective cover 14 on the rear side of the connecting plate 142 is formed with a circular observation hole 141, the front part of the pressure gauge 12 shell is inserted into the observation hole 141 of the protective cover 14, the value on the pressure gauge 12 can be observed through the observation hole 141, and the observation hole 141 can position the pressure gauge 12 to prevent the pressure gauge 12 from rotating and leaking oil.

[0025] The central axis of the transmission shaft 5, the central axis of the motor 4 and the central axis of the adapter support 31 are on the same straight line, and the diameter of the transmission shaft 5 is smaller than the diameter of the inner wall of the adapter support 31.

[0026] The vertical float type liquid level sensor 18 is inserted in the lower oil tank 1, the upper end of the float type liquid level sensor 18 is inserted and fixed on the installation cover plate 2 and located in the protective cover 14, the oil amount in the lower oil tank 1 can be detected through the float type liquid level sensor 18, and the lubricating oil can be added in time.

[0027] The rear side of the installation cover plate 2 is bent to form a vertical fold plate, and a plurality of mounting holes are formed on the fold plate.

[0028] Working principle: the structure is compact, and the main technical points of the electric gear pump are embodied in two points, one point is that a half-circular annular connecting bracket 31 is designed in the lower oil tank 1, the middle part of the connecting bracket 31 can be provided with a transmission shaft 5, the transmission shaft 5 can enter and exit from the slot of the connecting bracket 31, and the installation is convenient; meanwhile, the oil outlet channel 32 is arranged on the outer wall of the connecting bracket 31, so that the upper part of the transmission shaft 5 is not affected by oil pressure, and the problem of oil leakage does not occur;

[0029] The other point is that the motor 4, the oil outlet socket 11, the pressure gauge 12 and the pressure sensor 17 and other components are arranged on the protective cover 14, and the oil inlet 15 is integrated on the protective cover 14, so that the assembly is convenient, the components above the lower oil tank 1 can be effectively protected, and the oiling is not affected.

[0030] The embodiments are used to illustrate the utility model, and are not used to limit the utility model. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the utility model, therefore, the protection scope of the utility model should be as listed in the claims of the utility model.

Claims

1. A compact electric gear pump, comprising a rectangular lower oil tank (1), a mounting cover plate (2) is fixed to the upper end of the lower oil tank (1), a motor mounting seat (3) is fixed to one side of the mounting cover plate (2) by insertion, a vertical motor (4) is fixed to the motor mounting seat (3), characterized in that: The lower part of the motor mounting base (3) is inserted into the lower oil tank (1) and is formed with a horizontal section semi-circular ring-shaped connecting bracket (31), the notch of the connecting bracket (31) faces forward and is inserted with a vertical transmission shaft (5), the lower end of the connecting bracket (31) is formed with a gear pump shell seat, the gear pump (6) is installed in the gear pump shell seat, the lower end of the transmission shaft (5) is connected with the gear pump (6), and the upper end is fixedly connected with the rotating shaft of the motor (4); The outer wall of the lower part of the connecting bracket (31) is formed with an oil outlet channel (32) connected with the output port of the gear pump (6), the middle part of the connecting bracket (31) is fixedly connected with a front connecting seat (33) which is transverse and communicated with the oil outlet channel (32), and the left end of the front connecting seat (33) is fixedly screwed with a safety valve (10); the outer wall of the rear side of the connecting bracket (31) is formed with a rear connecting seat (34) which is longitudinal, the rear end face of the rear connecting seat (34) is formed with a valve hole (35), the bottom of the valve hole (35) is formed with a communication hole (36) which is communicated with the oil outlet channel (32); the valve hole (35) of the rear connecting seat (34) is screwed with a pressure regulating valve (7), the pressure regulating valve (7) comprises an adjusting head (71), the front end of the adjusting head (71) is formed with a cylindrical connecting column (711), the connecting column (711) is inserted with a compression spring (73), the front end of the compression spring (73) is inserted and pressed against an umbrella-shaped valve (72), the outer ring of the umbrella-shaped valve (72) is pressed against the inner wall of the valve hole (35), the front end is inserted into a positioning sleeve, the positioning sleeve is fixedly inserted into the valve hole (35) and communicated with the communication hole (36), the rear connecting seat (34) on both sides of the positioning sleeve is respectively fixedly inserted with a pressure measuring pipe (8) and an oil feeding pipe (9) which are communicated with the valve hole (35), the tail end of the oil feeding pipe (9) penetrates through a mounting cover plate (2) and is fixedly connected with an oil outlet connector (11), the upper end face of the oil outlet connector (11) is fixedly screwed with a pressure gauge (12), and the side end face is fixedly screwed with a rotary joint (13); the upper end of the pressure measuring pipe (8) is fixedly connected with a pressure sensor (17) which penetrates through the mounting cover plate (2), and the oil outlet connector (11) is fixedly connected with the mounting cover plate (2); The outer side of the motor (4), the oil outlet connector (11), the pressure gauge (12) and the pressure sensor (17) is sleeved with a protective cover (14), the lower part of one side of the protective cover (14) is formed with a horizontal connecting plate (142), the connecting plate (142) abuts against the upper end face of the mounting cover plate (2) and is fixedly connected with a refueling port (15), the lower part of the refueling port (15) is inserted into the lower oil tank (1), and the protective cover (14) is fixedly connected with the mounting cover plate (2) through screws.

2. A compact electric gear pump according to claim 1, characterized in that: The refueling port (15) is screwed with a cap (16), the cap (16) is fixedly connected with an anti-lost chain, and the tail end of the anti-lost chain is fixedly connected with the connecting plate (142) of the protective cover (14).

3. A compact electric gear pump according to claim 1, characterized in that: The connecting plate (142) is located on the front side of the oil outlet connector (11), the front end face of the protective cover (14) on the rear side of the connecting plate (142) is formed with a circular observation hole (141), and the front part of the pressure gauge (12) shell is inserted into the observation hole (141) of the protective cover (14).

4. A compact electric gear pump according to claim 1, characterized in that: The center axis of the transmission shaft (5), the center axis of the motor (4) and the center axis of the connecting support (31) are on the same line, and the diameter of the transmission shaft (5) is smaller than the diameter of the inner wall of the connecting support (31).

5. A compact electric gear pump according to claim 1, characterized in that: The lower oil tank (1) is provided with a vertical float type liquid level sensor (18) inserted therein, and the upper end of the float type liquid level sensor (18) is inserted and fixed on the mounting cover plate (2) and located in the protective cover (14).

6. A compact electric gear pump according to claim 1, characterized in that: The rear side of the mounting cover plate (2) extends out of the protective cover (14) and is bent into a vertical flange, and a plurality of mounting holes are formed on the flange.

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