CN113765279A

CN113765279A - Direct-current permanent magnet brush motor for plunger oil pump

Info

Publication number: CN113765279A
Application number: CN202111095315.5A
Authority: CN
Inventors: 樊雄; 卜志龙; 蒋文兵; 曾宪君
Original assignee: Wuhan Tongkai Automobile Motor Co ltd
Current assignee: Wuhan Tongkai Automobile Motor Co ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2021-12-07

Abstract

The invention discloses a direct-current permanent magnet brush motor for a plunger oil pump, which belongs to the technical field of direct-current permanent magnet brush motors and comprises a motor shell, wherein a motor is arranged in the motor shell, an end cover is arranged on the left side of the motor shell, a front bearing is clamped on the right side surface of the end cover, a main shaft is sleeved in the front bearing, the right end of the main shaft is fixedly connected with an output shaft of the motor, an oil seal is sleeved on the outer surface of the main shaft, the oil seal is clamped on the left side surface of the end cover, and an eccentric shaft sleeve is clamped on the outer surface of the main shaft. In the invention, the working condition of the motor (short-time working and low use frequency) is fully considered, the conventional eccentric bearing and the eccentric shaft are combined and then decomposed into the eccentric shaft sleeve and the common shaft, and on the basis, the whole motor structure is rearranged and combined, so that the dynamic balance grade of the motor is high (the dynamic balance design of the motor can be realized by adding an eccentric shaft and an eccentric shaft sleeve which is a new part).

Description

Direct-current permanent magnet brush motor for plunger oil pump

Technical Field

The invention belongs to the technical field of direct-current permanent magnet brush motors, and particularly relates to a direct-current permanent magnet brush motor for a plunger oil pump.

Background

The permanent magnet dc motor may be classified into a permanent magnet brushless dc motor and a permanent magnet brush dc motor according to presence or absence of a brush. A permanent magnet dc motor is a dc motor that uses permanent magnets to create a magnetic field. The permanent magnet direct current motor is widely applied to various portable electronic devices or appliances, such as a recorder, a VCD (video recorder), a phonograph, an electric massager and various toys, also widely applied to industries such as automobiles, motorcycles, hand dryers, electric bicycles, storage battery cars, ships, aviation, machinery and the like, and also widely applied to some high-precision products, such as video recorders, copiers, cameras, mobile phones, precision machine tools, bank note counting machines, bank note bundling machines and the like.

The locomotive lifting system has entered the electric era from the manual era. At present, the mainstream lifting power system in the electric era is a plunger pump and a direct-current permanent magnet brush motor. With the development of the industry, the continuous updating of technology is essential. According to the using working conditions, the direct-current permanent magnet brush motor with the novel structure is purposefully invented, so that when the actual using requirements are met, the cost of motor parts and the manufacturing cost can be obviously reduced, the process difficulty is reduced, and the qualified rate is improved.

Disclosure of Invention

The invention aims to: in order to solve the problems of high cost of motor parts, high manufacturing cost and high process difficulty, the direct-current permanent magnet brush motor for the plunger oil pump is provided.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a direct current permanent magnetism brush motor for plunger oil pump, includes the motor casing, be provided with the motor in the motor casing, the left side of motor casing is provided with the end cover, and the right flank joint of end cover has the front bearing, and the front bearing endotheca is equipped with the main shaft, and the right-hand member of main shaft and the output shaft fixed connection of motor, the surface cover of main shaft are equipped with the oil blanket, and the oil blanket joint is at the left surface of end cover, and the surface joint of main shaft has eccentric sleeve.

As a further description of the above technical solution:

the eccentric shaft sleeve and the main shaft jointly form a cam structure, and the eccentric amount of the cam structure is A.

As a further description of the above technical solution:

the main shaft is a common shaft, the processing difficulty is low, and meanwhile, the data of the maximum diameter D1 of the main shaft is small.

As a further description of the above technical solution:

the diameter D2 is between the output shaft of motor, and the data of diameter D2 is less.

As a further description of the above technical solution:

the front bearing is in interference connection with the main shaft.

As a further description of the above technical solution:

the motor casing is a whole machine casing, namely a conventional end cover and the casing are combined into a part.

As a further description of the above technical solution:

the end cover is detachably connected with the shell through short screws.

As a further description of the above technical solution:

the oil seal and the front bearing are small in model.

As a further description of the above technical solution:

the outer side of the motor output shaft is sleeved with a commutator which is arranged in the end cover.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

in the invention, the working condition (short-time working and low use frequency) of the motor is fully considered, the conventional eccentric bearing and the eccentric shaft are combined and then decomposed into the eccentric shaft sleeve and the common shaft, and the whole motor structure is rearranged and combined on the basis, thus the motor has the following advantages: 1. the part processing degree of difficulty reduces, 2, part quantity reduces, 3, material cost greatly reduced, 4, the technology degree of difficulty reduces, and the qualification rate improves, the automation of being convenient for, 5, manufacturing cost reduces, 6, motor seal reliability and sealing grade are higher (O type circle quantity reduces, does not have screw seal, and the linear velocity of oil blanket reduces), 7, motor dynamic balance grade height (because cancelled the eccentric shaft, and newly-increased part "eccentric sleeve", can carry out self dynamic balance design).

Drawings

Fig. 1 is a schematic structural diagram of a dc permanent magnet brush motor for a plunger oil pump according to the present invention;

fig. 2 is a schematic structural diagram of a side view of a dc permanent magnet brush motor for a plunger oil pump according to the present invention;

fig. 3 is a schematic structural diagram of a direct-current permanent magnet brush motor for a plunger oil pump according to the present invention, which is exploded from the right;

fig. 4 is a schematic left-side perspective exploded structural diagram of a dc permanent magnet brush motor for a plunger oil pump according to the present invention.

Illustration of the drawings:

1. an eccentric shaft sleeve; 2. a main shaft; 3. oil sealing; 4. a front bearing; 5. an end cap; 6. a commutator; 7. a motor housing; 8. an electric motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a direct current permanent magnetism brush motor for plunger oil pump, includes motor casing 7, be provided with motor 8 in the motor casing 7, the left side of motor casing 7 is provided with end cover 5, and the right flank joint of end cover 5 has front bearing 4, and front bearing 4 endotheca is equipped with main shaft 2, and the right-hand member of main shaft 2 and motor 8's output shaft fixed connection, the surface cover of main shaft 2 are equipped with

oil blanket

3, and 3 joints of oil blanket are at the left surface of end cover 5, and the surface joint of main shaft 2 has eccentric sleeve 1.

Specifically, the eccentric shaft sleeve 1 and the main shaft 2 jointly form a cam structure, the eccentricity of the cam structure is A, and when the motor 8 rotates, the cam structure applies work to the plunger pump motor 8.

Specifically, the spindle 2 is a common spindle, and has low processing difficulty, and the data of the maximum diameter D1 of the spindle 2 is small.

Specifically, the diameter D2 is set between the output shafts of the motor 8, and the data of the diameter D2 is small.

Specifically, the front bearing 4 and the main shaft 2 are in interference connection, and the main shaft 2 can stably rotate under the action of the front bearing 4.

Specifically, the motor casing 7 is a whole machine casing, that is, the conventional end cover 5 and the casing are combined into a single part.

Specifically, the end cover 5 is detachably connected with the casing through a short screw.

Specifically, the oil seal 3 and the front bearing 4 are small in size, and the small oil seal 3 can reduce friction torque, so that the efficiency of the motor 8 is improved.

Specifically, the commutator 6 is sleeved on the outer side of an output shaft of the motor 8, the commutator 6 is arranged in the end cover 5, the commutator 6 can be arranged in a front mode, the commutator 6 is arranged in a front mode, meanwhile, the front bearing 4 and the main shaft 2 can be in interference fit, the whole assembly process is simple, and the process is smooth.

The working principle is as follows: during the use, 8 axles of motor are connected with eccentric sleeve 1 and are connected through the interference of spline or unthreaded hole (when 8 life-span demands of motor are very long, can further decompose eccentric sleeve 1 into eccentric sleeve 1 and add the bearing to increase eccentric sleeve 1's wear-resisting life), make these two parts form a whole, constitute cam mechanism jointly with the oil pump plunger, thereby can transmit the output mechanical energy of motor 8 to the plunger oil pump through eccentric sleeve 1, accomplish the energy transfer. This structure is rationally disassembled cam mechanism, disassembles to eccentric sleeve 1 that can automatic balance and the ordinary axle of being convenient for processing, and the shoulder diameter of axle can not receive the restriction of the eccentric size of cam, the less that can do. So that the commutator 6 can be placed at the front or rear end of the motor 8. When the commutator 6 is arranged at the front end of the motor 8, the brush holder is also arranged at the front end, so that the shell and the rear end cover 5 are not limited by the brush holder any more, and the shell and the rear end cover can be combined into a whole.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a direct current permanent magnetism brush motor for plunger oil pump, includes motor casing (7), a serial communication port, be provided with motor (8) in motor casing (7), the left side of motor casing (7) is provided with end cover (5), the right flank joint of end cover (5) has front bearing (4), front bearing (4) endotheca is equipped with main shaft (2), the right-hand member of main shaft (2) and the output shaft fixed connection of motor (8), the surface cover of main shaft (2) is equipped with oil blanket (3), oil blanket (3) joint is at the left surface of end cover (5), the surface joint of main shaft (2) has eccentric sleeve (1).

2. The direct-current permanent magnet brush motor for the plunger oil pump is characterized in that the eccentric shaft sleeve (1) and the main shaft (2) form a cam structure together, and the eccentricity of the cam structure is A.

3. The direct-current permanent magnet brush motor for the plunger oil pump according to claim 1, characterized in that the main shaft (2) is a common shaft and has low processing difficulty, and the data of the maximum diameter D1 of the main shaft (2) is small.

4. A dc permanent magnet brush motor for a plunger oil pump according to claim 1, characterized in that the diameter between the output shafts of the motor (8) is D2, the data of diameter D2 is smaller.

5. A dc permanent magnet brush motor for a plunger oil pump according to claim 1, characterized in that the front bearing (4) is in interference connection with the main shaft (2).

6. A dc permanent magnet brush motor for a plunger oil pump according to claim 1, characterized in that the motor housing (7) is the whole machine housing, i.e. the conventional end cap (5) is integrated with the housing as one piece.

7. A dc permanent magnet brush motor for a plunger oil pump according to claim 1, characterized in that the end cap (5) is detachably connected to the casing by short screws.

8. A dc permanent magnet brush motor for a plunger oil pump according to claim 1, characterized in that the oil seal (3) and the front bearing (4) are of a smaller size.

9. A DC permanent magnet brush motor for plunger oil pump according to claim 1, characterized in that the commutator (6) is sleeved outside the output shaft of the motor (8), and the commutator (6) is arranged in the end cover (5).