CN219431989U - Motor pump and hydraulic device composed of two-dimensional piston pump - Google Patents

Abstract

The utility model relates to a motor pump and a hydraulic device which are composed of two-dimensional piston pumps, comprising: a motor comprising a first housing and a motor shaft within the first housing; the two-dimensional piston pump comprises a second shell and a piston shaft positioned in the second shell, and the second shell is detachably connected with the first shell; the coupling assembly is located between the motor and the two-dimensional piston pump to transmit torque, the coupling assembly comprises a first connecting piece and a second connecting piece, the first connecting piece is connected with a motor shaft, the second connecting piece is connected with a piston shaft, and the first connecting piece is connected with the second connecting piece to transmit torque. The novel hydraulic pressure control device is compact in structure, good in stability, convenient to assemble and disassemble, small in size and capable of achieving modularized design.

Description

Motor pump and hydraulic device composed of two-dimensional piston pump

Technical Field

The utility model relates to the technical field of hydraulic pressure, in particular to a motor pump formed by a two-dimensional piston pump and a hydraulic device.

Background

An electric motor is an element that converts electrical energy into mechanical energy to provide power, and is commonly used as a power source for pumps. An outer rotor motor is a motor with coils on the stator and permanent magnets on the outer rotor. Compared with a common motor, the rotor of the two-dimensional motor can do certain axial movement while doing rotary motion. A hydraulic pump is a type of hydraulic element that supplies pressurized fluid in a hydraulic system, and is a conversion device that converts mechanical energy of an electric motor, an internal combustion engine, or the like into hydraulic energy. The piston pump is driven by the reciprocating motion of the piston, so that the working volume of the pump volume cavity is periodically changed, and liquid is sucked and discharged. Compared with a common piston pump, the two-dimensional piston pump utilizes a piston component in the two-dimensional motion conversion mechanism to perform two-dimensional motion of rotation and axial direct motion, simultaneously realizes the oil sucking and discharging function and the flow distribution function, and improves the volumetric efficiency and the integration level; the oil can be continuously sucked and discharged for a plurality of times by rotating the piston of the two-dimensional piston pump, so that the power density is improved.

The plunger pump and the motor are connected by adopting a flange and other modes in the hydraulic field, so that the plunger pump is complex in structure, complex in disassembly and assembly steps and inconvenient to use.

Disclosure of Invention

Therefore, the utility model aims to overcome the technical defects that the plunger pump and the motor are connected by adopting a flange and the like in the prior art, the structure is complex, and the disassembly and assembly steps are complicated.

In order to solve the technical problems, the present utility model provides a motor pump composed of a two-dimensional piston pump, comprising:

a motor comprising a first housing and a motor shaft within the first housing;

the two-dimensional piston pump comprises a second shell and a piston shaft positioned in the second shell, and the second shell is detachably connected with the first shell;

the coupling assembly is located between the motor and the two-dimensional piston pump to transmit torque, the coupling assembly comprises a first connecting piece and a second connecting piece, the first connecting piece is connected with a motor shaft, the second connecting piece is connected with a piston shaft, and the first connecting piece is connected with the second connecting piece to transmit torque.

Preferably, the first connecting piece comprises two branches, and the two branches are inserted into the second connecting piece.

Preferably, the connecting piece comprises a mounting part, two accommodating cavities are formed in the mounting part, a ball body is arranged in each accommodating cavity, and the ball body is mounted on the branch fork.

Preferably, the second connecting piece is fixed with the piston rod by welding.

Preferably, the second connecting piece is provided with a deep groove ball bearing in a pressing mode.

Preferably, the first housing and the second housing are connected by screw threads.

Preferably, the first shell is provided with an internal thread, the second shell is provided with an external thread, and the internal thread and the external thread are matched.

Preferably, the first connecting piece is provided with a mounting shaft on both sides, and the mounting shaft is provided with a roller.

Preferably, the motor is a wet outer rotor motor or a wet inner rotor motor.

The utility model discloses a hydraulic device which comprises the motor pump formed by the two-dimensional piston pump.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. when the motor works, the motor shaft rotates, and the rotation of the motor shaft is transmitted to the two-dimensional piston pump through the coupling assembly, so that the two-dimensional piston pump can be driven to rotate together, the flow of the two-dimensional piston pump can be changed by adjusting the rotating speed of the motor, the circulating hydraulic oil quantity is reduced, the oil temperature is reduced, and the noise is reduced.

2. The utility model has compact structure, good stability and small volume, and realizes modularized design.

3. The first shell and the second shell are detachably connected, so that the two-dimensional piston pump and the motor are assembled into a whole conveniently, the two-dimensional piston pump and the motor form a module, the structure is small, and the assembly and the disassembly are convenient.

4. According to the utility model, through the arrangement of the coupling component, torque transmission between the motor and the two-dimensional piston pump can be better realized, so that the motor pump has two-direction degrees of freedom, on one hand, the motor pump can realize linear motion, and on the other hand, the motor pump can also realize rotation.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a partial cross-sectional view of the present utility model;

FIG. 3 is a cross-sectional view of the coupling assembly;

fig. 4 is a schematic structural view of the coupling assembly.

Description of the specification reference numerals: 10. a motor; 11. a first housing; 12. a motor shaft; 20. a two-dimensional piston pump; 21. a second housing; 22. a piston shaft; 30. a coupling assembly; 31. a first connector; 32. a second connector; 321. a receiving chamber; 322. a mounting shaft; 33. a sphere; 34. a roller; 40. deep groove ball bearings.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. It should be noted that, in the case of no conflict, the features of the embodiments of the present application may be combined with each other, and the combined embodiments still fall within the protection scope of the present application.

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on the drawings, are merely for convenience of description of the present application and for simplification of description, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Referring to fig. 1-4, the present utility model discloses a motor pump comprising a two-dimensional piston pump, including a motor 10, a two-dimensional piston pump 20, and a coupling assembly 30.

The motor 10 includes a first housing 11 and a motor shaft 12 located within the first housing 11. The motor shaft 12 is rotatable about its central axis.

The two-dimensional piston pump 20 includes a second housing 21 and a piston shaft 22 located in the second housing 21, the second housing 21 being detachably connected to the first housing 11.

The coupling assembly 30 is located between the motor 10 and the two-dimensional piston pump 20 to transmit torque, and the coupling assembly 30 includes a first coupling member 31 and a second coupling member 32, the first coupling member 31 being coupled to the motor shaft 12, the second coupling member 32 being coupled to the piston shaft 22, the first coupling member 31 being coupled to the second coupling member 32 to transmit torque.

The working principle of the utility model is as follows: when the motor 10 works, the motor shaft 12 rotates, the rotation of the motor shaft 12 is transmitted to the two-dimensional piston pump 20 through the coupling assembly 30, so that the two-dimensional piston pump 20 can be driven to rotate together, the flow of the two-dimensional piston pump 20 can be changed by adjusting the rotating speed of the motor 10, the circulating hydraulic oil quantity is reduced, the oil temperature is reduced, the noise is reduced, the structure is compact, the stability is good, and the volume is small, and the modular design is realized.

Since the first housing 11 and the second housing 21 are detachably connected, it is convenient to assemble the two-dimensional piston pump 20 and the motor 10 as one body. Thus, the two-dimensional piston pump 20 and the motor 10 form a module, and the two-dimensional piston pump is small in structure and convenient to assemble and disassemble.

The utility model can better realize the torque transmission between the motor 10 and the two-dimensional piston pump 20 by arranging the coupling component 30, so that the motor pump has two degrees of freedom, on one hand, the motor pump can realize linear motion, and on the other hand, the motor pump can also realize rotation.

Further, the first connecting member 31 includes two branches, and both branches are inserted into the second connecting member 32. Through two branch fork inserts and establishes on second connecting piece 32, so, can realize the synchronous action of first connecting piece 31 and second connecting piece 32, realize the moment of torsion transmission, compact structure.

The connecting piece comprises a mounting part, two accommodating cavities 321 are formed in the mounting part, a ball body 33 is arranged in each accommodating cavity 321, and the ball body 33 is mounted on the branch fork. The ball 33 may be a steel ball. By providing the balls 33, friction can be reduced and torque transmission efficiency is higher.

The second connecting piece 32 is fixed with the piston rod by welding. Thus, structural stability can be ensured. Specifically, the second connecting piece 32 may be provided with a first mounting groove, and the piston rod is inserted into the first mounting groove and welded, so as to realize the fixed connection between the piston rod and the second connecting piece 32.

Further, the second connector 32 is press-fitted with a deep groove ball bearing 40. The deep groove ball bearing 40 can reduce friction and improve torque transmission efficiency.

The first housing 11 and the second housing 21 are connected by screw threads, and thus, the disassembly and the installation are convenient. By screwing the first housing 11 and the second housing 21, the two-dimensional piston pump 20 and the motor 10 can be formed into an integral structure with good stability.

Specifically, the first housing 11 is provided with an internal thread, and the second housing 21 is provided with an external thread, and the internal thread is matched with the external thread. Further, the first housing 11 and the second housing 21 may be connected by means of a snap, so that the disassembly and the assembly are convenient.

In order to further reduce friction, mounting shafts 322 are provided on both sides of the first connecting member 31, and rollers 34 are mounted on the mounting shafts 322. The roller 34 acts as a roller bearing to provide more smoothness and reduced drag to the coupling assembly 30 during axial rotation.

In this embodiment, the motor 10 is a wet outer rotor motor or a wet inner rotor motor, and specifically, a worker can design according to the working requirement. The wet outer rotor motor or the wet inner rotor motor has good heat dissipation performance and good lubricating performance.

The utility model discloses a hydraulic device, which comprises the motor pump formed by the two-dimensional piston pump 20.

The following describes the assembly mode of the motor pump in the present utility model:

1. the second connecting piece 32 is fixedly connected with the piston shaft 22 of the two-dimensional piston pump 20 by welding;

2. mounting the ball 33 into the receiving cavity 321 of the second connector 32;

3. press-fitting the deep groove ball bearing 40 to the first connecting member 31;

4. connecting the first connecting piece 31 with the deep groove ball bearing 40 and the motor shaft 12;

5. the first connecting piece 31 and the first connecting piece 31 are installed, so that two branches on the first connecting piece 31 respectively penetrate through the second connecting piece 32 and the ball 33 in the second connecting piece, and the two-dimensional piston pump 20 can be driven to rotate by the shaft coupling assembly 30 when the motor 10 rotates.

The utility model has the following advantages:

1. small volume, light weight, simple and compact structure and high power density;

2. the speed adjusting range is wide and can reach 20000rpm;

3. the output pressure is high, the volumetric efficiency is high, and the power-weight ratio is high;

4. no dynamic seal and external leakage caused by the dynamic seal;

5. the motor 10 is fully immersed with oil, so that the heat dissipation, noise, vibration and efficiency are all improved;

6. the connecting piece is omitted, the system is simplified, and the overall reliability is improved;

7. the self-lubricating and heat-dissipating effects are good, and the running is stable;

8. the protection effect is good, and the IP67 protection level is achieved.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (10)

1. An electric motor pump comprising a two-dimensional piston pump, comprising:

a motor comprising a first housing and a motor shaft within the first housing;

the two-dimensional piston pump comprises a second shell and a piston shaft positioned in the second shell, and the second shell is detachably connected with the first shell;

the coupling assembly is located between the motor and the two-dimensional piston pump to transmit torque, the coupling assembly comprises a first connecting piece and a second connecting piece, the first connecting piece is connected with a motor shaft, the second connecting piece is connected with a piston shaft, and the first connecting piece is connected with the second connecting piece to transmit torque.

2. The motor pump of claim 1, wherein the first connector comprises two prongs, both of which are inserted into the second connector.

3. The motor pump of claim 2, wherein the connecting piece comprises a mounting portion, two accommodating chambers are formed in the mounting portion, a ball is arranged in each accommodating chamber, and the ball is mounted on the branch fork.

4. The motor pump of claim 1, wherein the second connector is secured to the piston rod by welding.

5. The motor pump of claim 1, wherein the second connector is press-fitted with a deep groove ball bearing.

6. The motor pump of claim 1, wherein the first housing and the second housing are threadably connected.

7. The motor pump of claim 6, wherein the first housing is provided with internal threads and the second housing is provided with external threads, the internal threads being configured to mate with the external threads.

8. The motor pump of claim 1, wherein the first connector has mounting shafts on both sides, and the rollers are mounted on the mounting shafts.

9. The motor pump constituted by a two-dimensional piston pump according to claim 1, wherein the motor is a wet outer rotor motor or a wet inner rotor motor.

10. A hydraulic device comprising a motor pump according to any one of claims 1-9, which is constituted by a two-dimensional piston pump.