Hydraulic pump

Abstract

The utility model belongs to the technical field of hydraulic equipment, and particularly relates to a hydraulic pump, which comprises an oil tank, a hydraulic pump and a hydraulic pump, the pump head is arranged in the oil tank; the motor is arranged outside the oil tank and drives the pump head located in the oil tank; the hydraulic valve group is connected with the pump head and is used for being connected with external hydraulic equipment through the hydraulic valve group; wherein the motor is an outer rotor brushless motor. According to the hydraulic pump, the motor is the outer rotor brushless motor, due to the fact that an electric brush does not exist, sparks generated by the electric brush cannot be generated, the hydraulic pump can be used for some complex occasions such as some places with much dust or inflammable occasions, and the hydraulic pump is more flexible to use.

Description

Technical Field

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

[0002] Chinese utility model 201711183956X discloses a high-precision electric hydraulic pump, specifically a high-precision electric hydraulic pump; including an oil tank, an electric motor is arranged above the oil tank, a hydraulic pump head is connected to the bottom side of the electric motor, and the hydraulic pump head is connected to the oil tank. As shown in the patent, existing electric motors all use brush motors. When the brush motor is working, the brush contacts the coil and generates sparks. If the electric hydraulic pump is used in some harsh environments, the generated sparks will pose certain safety hazards. Summary of the invention

[0003] The utility model aims to provide a hydraulic pump with better working performance and greater safety.

[0004] The purpose of the utility model is achieved in this way:

[0005] A hydraulic pump, comprising:

[0006] Oil tank, used to store hydraulic oil;

[0007] A pump head, disposed in the oil tank;

[0008] a motor, disposed outside the oil tank and driving a pump head located in the oil tank; and

[0009] A hydraulic valve group, connected to the pump head, used to connect to external hydraulic equipment through the hydraulic valve group;

[0010] Wherein, the motor is an outer rotor brushless motor.

[0011] Furthermore, a connecting seat is provided on the oil tank, the outer rotor brushless motor includes a rotating shaft arranged in the connecting seat, a bearing is provided outside the rotating shaft, and the outer rotor brushless motor also includes a stator arranged outside the connecting seat, the stator is provided with a rotor sleeve, the rotor sleeve is connected to one end of the rotating shaft, and the other end of the rotating shaft is connected to the pump head.

[0012] Furthermore, one end of the rotor sleeve is connected to a blade rack, the blade rack is provided with blades, and the center of the blade rack is provided with a connecting hole for connecting the rotating shaft.

[0013] Furthermore, an annular clamping boss is provided at the bottom of the connecting seat, and an annular clamping groove opposite to the annular clamping boss is provided on the oil tank.

[0014] Furthermore, a plurality of outwardly extending supporting feet are provided at the bottom of the connecting seat, and fasteners for connecting the supporting feet to the oil tank are provided on the supporting feet.

[0015] Furthermore, the connecting seat includes a boss portion located on the support foot portion, the bearing member includes a first bearing member located in the boss portion, the boss portion is also provided with an extension portion with a smaller cross-sectional area than the boss portion, and the bearing member includes a second bearing member arranged in the extension portion.

[0016] Furthermore, the pump head includes a cam arranged on the rotating shaft, and one end of the cam is provided with an abutting inclined surface; the pump head also includes a pump head seat, and the pump head seat is provided with a plurality of piston members that abut against the abutting inclined surface, and the piston members are respectively connected to the inlet and outlet on the pump head seat.

[0017] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0018] The motor in this patent is an outer rotor brushless motor. Since there are no brushes, sparks generated by brushes will not be generated, so the hydraulic pump in this patent can be used in some complex occasions, such as some dusty places or flammable places, making the hydraulic pump in this patent more flexible to use. In addition, compared with the existing brushed motor, the outer rotor brushless motor has a lower energy loss rate. In the same time, the hydraulic pump in this patent consumes less electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a cross-sectional schematic diagram of the pump head of the utility model.

[0021] Figure 3 It is a truncated schematic diagram of the pump head of the utility model.

[0022] Figure 4 This is a schematic diagram of the structure after the fuel tank is removed.

[0023] The meaning of the symbols in the figure:

[0024] 1. Oil tank; 11. Annular engagement groove;

[0025] 2. Pump head; 21. Cam; 22. Pump head seat; 23. Piston; 24. Inlet; 25. Outlet; 26. Pipeline; 27. Sealing cover;

[0026] 3. Motor; 31. Rotating shaft; 321. First bearing member; 322. Second bearing member; 33. Stator; 34. Rotor sleeve; 35. Fan blade frame; 36. Fan blade; 37. Adapter hole;

[0027] 4. Hydraulic valve group;

[0028] 5. Connecting seat; 51. Annular engaging boss; 52. Support foot; 53. Boss; 54. Extension; DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with specific embodiments:

[0030] A hydraulic pump, such as Figure 1 , 2 As shown, it includes an oil tank 1, a pump head 2, a motor 3 and a hydraulic valve group 4. The oil tank 1 is square, and an openable and closable oil inlet is provided on one side of the oil tank 1. The oil tank 1 is used to store hydraulic oil, and the oil inlet is used to supplement or replace the hydraulic oil; the pump head 2 is arranged in the oil tank 1, and the motor 3 is arranged outside the oil tank 1 and drives the pump head 2 located in the oil tank 1. The hydraulic valve group 4 is connected to the pump head 2 and is used to connect to external hydraulic equipment through the hydraulic valve group 4.

[0031] Specific as Figure 2 As shown, the oil tank 1 is provided with a connecting seat 5, and the bottom of the connecting seat 5 is provided with a plurality of outwardly extending supporting legs 52, and a total of four supporting legs 52 are provided, which extend outward toward the four corners of the connecting seat 5, and the end of the connecting seat 5 is provided with a threaded hole, and the connecting seat 5 is fixed to the oil tank 1 by arranging fasteners in the threaded holes; the connecting seat 5 also includes a boss portion 53 arranged on the supporting legs 52, and the boss portion 53 is circular, and the boss portion 53 is also provided with an extension having a cross-sectional area smaller than the boss portion 53. The extension portion 54 is also circular, and the extension portion 54 and the boss portion 53 are hollow. The outer rotor brushless motor includes a rotating shaft 31 arranged in the connecting seat 5, and a bearing member is provided outside the rotating shaft 31; the bearing member in this patent includes a first bearing member 321 located in the boss portion 53 and a second bearing member 322 arranged in the extension portion 54, which are respectively arranged up and down, and the rotating shaft 31 can be rotated in the connecting seat 5 through the first bearing member 321 and the second bearing member 322.

[0032] like Figure 2 , 3 As shown, the outer rotor brushless motor also includes a stator 33 and a rotor sleeve 34. The stator 33 is fixed outside the connection seat 5, and is specifically arranged outside the extension portion 54 of the connection seat 5. The rotor sleeve 34 is outside the stator 33, and the top of the rotor sleeve 34 is connected to the rotating shaft 31. When working, the stator 33 is energized to drive the rotor to work, thereby driving the rotating shaft 31 to rotate through the rotor. The rotating shaft 31 is connected to the pump head 2, and the hydraulic oil is adsorbed to the hydraulic valve group 4 through the rotation of the pump head 2, and is connected to external hydraulic equipment through the hydraulic valve group 4 to realize the driving of the external hydraulic equipment.

[0033] The motor 3 in this patent is an outer rotor brushless motor. Since there are no brushes, sparks generated by brushes will not be generated, so the hydraulic pump in this patent can be used in some complex occasions, such as some dusty places or flammable places, making the hydraulic pump in this patent more flexible to use. In addition, compared with the existing brushed motor 3, the outer rotor brushless motor has a lower energy loss rate. In the same time, the hydraulic pump in this patent consumes less electricity.

[0034] Furthermore, one end of the rotor sleeve 34 is connected to a blade rack 35, on which blades 36 are arranged, and a transfer hole 37 for connecting the rotating shaft 31 is arranged at the center of the blade rack 35. The rotating shaft 31 is connected to the rotor sleeve 34 through the blade rack 35, and the blades 36 are installed through the blade rack 35. When the rotor sleeve 34 is connected to the rotating shaft 31, the blades 36 can also be installed, and heat dissipation is achieved through the blades 36.

[0035] Furthermore, an annular snap-fitting boss 51 is provided at the bottom of the connecting seat 5, and an annular snap-fitting groove 11 opposite to the annular snap-fitting boss 51 is provided on the oil tank 1. The snap-fitting of the two reduces the difficulty of aligning the connecting seat 5, thereby facilitating the installation of the connecting seat 5.

[0036] like Figure 3 , 4 As shown, in this patent, the pump head 2 includes a cam 21 arranged on a rotating shaft 31, and one end of the cam 21 is provided with an abutting inclined surface; the pump head 2 also includes a pump head seat 22, and the pump head seat 22 is provided with a plurality of pistons 23 abutting against the abutting inclined surface, and the pistons 23 are respectively connected to the inlet 24 and the outlet 25 on the pump head seat 22; the pump head seat 22 is also provided with a sealing cover 27 for closing the cam 21, and a pipeline 26 connected to the solenoid valve is provided on the outlet 25 of the pump head seat 22. When working, the cam 21 rotates, driving each piston 23 to move in turn, so that the piston 23 absorbs hydraulic oil from the inlet 24 on the pump head seat 22, and then sends it to the solenoid valve from the outlet 25 through the pipeline 26.

[0037] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic pump, characterized in that: include: An oil tank (1), used for storing hydraulic oil; A pump head (2) is arranged in the oil tank (1); a motor (3) disposed outside the oil tank (1) and driving a pump head (2) located in the oil tank (1); and A hydraulic valve group (4), connected to the pump head (2), and used for connecting to external hydraulic equipment through the hydraulic valve group (4); Wherein, the motor (3) is an outer rotor brushless motor.

2. A hydraulic pump according to claim 1, characterized in that: The oil tank (1) is provided with a connecting seat (5), the outer rotor brushless motor comprises a rotating shaft (31) arranged in the connecting seat (5), a bearing member is arranged outside the rotating shaft (31), the outer rotor brushless motor also comprises a stator (33) arranged outside the connecting seat (5), the stator (33) is provided with a rotor sleeve (34), the rotor sleeve (34) is connected to one end of the rotating shaft (31), and the other end of the rotating shaft (31) is connected to the pump head (2).

3. A hydraulic pump according to claim 2, characterized in that: One end of the rotor sleeve (34) is connected to a blade frame (35), and the blade frame (35) is provided with blades (36). The center of the blade frame (35) is provided with a connecting hole (37) for connecting the rotating shaft (31).

4. A hydraulic pump according to claim 2, characterized in that: An annular clamping boss (51) is provided at the bottom of the connecting seat (5), and an annular clamping groove (11) opposite to the annular clamping boss (51) is provided on the oil tank (1).

5. A hydraulic pump according to claim 2, characterized in that: The bottom of the connecting seat (5) is provided with a plurality of supporting feet (52) extending outwards, and the supporting feet (52) are provided with fasteners for connecting the supporting feet to the oil tank (1).

6. A hydraulic pump according to claim 3, characterized in that: The connecting seat (5) comprises a boss portion (53) located on the support foot portion (52), the bearing member comprises a first bearing member (321) located in the boss portion (53), an extension portion (54) having a cross-sectional area smaller than that of the boss portion (53) is also provided on the boss portion (53), and the bearing member comprises a second bearing member (322) arranged in the extension portion (54).

7. A hydraulic pump according to claim 1, characterized in that: The pump head (2) comprises a cam (21) arranged on a rotating shaft (31), one end of the cam (21) being provided with an abutting inclined surface; the pump head (2) also comprises a pump head seat (22), the pump head seat (22) being provided with a plurality of piston members (23) abutting against the abutting inclined surface, the piston members (23) being respectively connected to an inlet (24) and an outlet (25) on the pump head seat (22).

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