CN213125759U

CN213125759U - Permanent magnet motor type small driving mechanism

Info

Publication number: CN213125759U
Application number: CN202021762270.3U
Authority: CN
Inventors: 刘磊; 张金山; 刘天才; 范月容; 郭志家; 彭朝晖; 赵守智
Original assignee: China Institute of Atomic of Energy
Current assignee: China Institute of Atomic of Energy
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-05-04
Anticipated expiration: 2030-08-21

Abstract

The utility model provides a permanent magnet motor type small driving mechanism, which comprises a shell, a transmission shaft, a pair of electromagnets, an elastic reset component, a main gear, a permanent magnet motor rotor, a permanent magnet motor stator, a driven gear and a rack transmission rod; it is through adopting the electro-magnet in the small-size actuating mechanism of permanent magnet motor formula in this scheme, the transmission shaft, the master gear, from the gear, mutually support between permanent magnet motor rotor and the permanent magnet motor stator, realize actuating mechanism's motion with comparatively compact and less volume mechanism, under the operating mode that the accident appears, circular telegram between the electro-magnet, the electro-magnet that links to each other with transmission shaft one end is fixed drives the transmission shaft and moves along another electro-magnet direction of axial, the transmission shaft after the removal and then drives permanent magnet motor rotor synchronous motion, thereby make and separate between permanent magnet motor rotor and the permanent magnet motor stator, drive the master gear simultaneously and separate from between the gear, realize the control to the control rod.

Description

Permanent magnet motor type small driving mechanism

Technical Field

The utility model relates to a control rod drive mechanism technical field, concretely relates to small-size actuating mechanism of permanent-magnet machine formula.

Background

At present, the reactor is developing towards miniaturization, the requirement on a control rod driving mechanism is higher and higher, and the reactor is required to have the characteristics of miniaturization, simple structure, high reliability and the like. The driving mechanism applied to the small reactor at home and abroad at present has large volume and low reliability.

Disclosure of Invention

To the defect that exists among the prior art, the utility model aims to provide a small-size actuating mechanism of permanent-magnet machine formula, its is small, simple structure and reliability height of this small-size actuating mechanism.

In order to achieve the above object, the utility model adopts the following technical scheme:

a permanent magnet motor miniature drive mechanism, said drive mechanism comprising:

a housing;

the transmission shaft is horizontally arranged in the inner cavity of the shell;

the pair of electromagnets are oppositely arranged, and one electromagnet is fixed at one end of the transmission shaft;

the elastic reset assembly is fixedly connected between the transmission shaft and the inner cavity of the shell;

the main gear is fixedly arranged on the transmission shaft;

the permanent magnet motor rotor is fixedly arranged at the other end of the transmission shaft;

the permanent magnet motor stator is arranged at the periphery of the permanent magnet motor rotor;

a slave gear;

and the rack transmission rod is arranged between the master gear and the slave gear, and is meshed with the master gear and the slave gear respectively.

In some embodiments, the driving mechanism further comprises a guide block fixedly mounted on the transmission shaft, wherein the guide block and the housing inner cavity form a sliding connection along the axial direction of the transmission shaft.

In some embodiments, the elastic return assembly includes a baffle plate and a compression spring, the baffle plate is installed between the inner cavity of the housing and the transmission shaft, the compression spring is installed between the baffle plate and the inner cavity of the housing along the axial direction of the transmission shaft, and the baffle plate and the inner cavity of the housing form a sliding connection.

In some embodiments, the driving mechanism further comprises a guide cylinder, the rack transmission rod is installed in an inner cavity of the guide cylinder, wherein openings are respectively formed on the upper end surface and the lower end surface of the guide cylinder, and the main gear and the secondary gear are respectively meshed with the rack transmission rod through the openings.

The invention has the beneficial effects that: it is through adopting the electro-magnet in the small-size actuating mechanism of permanent magnet motor formula in this scheme, the transmission shaft, the master gear, from the gear, mutually support between permanent magnet motor rotor and the permanent magnet motor stator, realize actuating mechanism's motion with comparatively compact and less volume mechanism, under the operating mode that the accident appears, circular telegram between the electro-magnet, the electro-magnet that links to each other with transmission shaft one end is fixed drives the transmission shaft and moves along another electro-magnet direction of axial, the transmission shaft after the removal and then drives permanent magnet motor rotor synchronous motion, thereby make and separate between permanent magnet motor rotor and the permanent magnet motor stator, drive the master gear simultaneously and separate from between the gear, realize the control to the control rod.

Drawings

Fig. 1 is a schematic view of the structural principle of a permanent magnet motor type small driving mechanism in the present invention.

Fig. 2 is the installation cooperation structure sketch map between electro-magnet, transmission shaft, permanent-magnet machine rotor and the permanent-magnet machine stator in the utility model.

Fig. 3 is a schematic structural diagram of the mutual cooperation between the master gear, the rack transmission rod and the slave gears in the present invention.

In the figure:

the device comprises a main gear 1, an electromagnet 2, a guide block 3, a driven gear 4, a permanent magnet motor rotor 5, a rack transmission rod 6, a transmission shaft 7, a permanent magnet motor stator 8, a baffle 9, a compression spring 10 and a guide cylinder 11.

Detailed Description

The present invention will be described in further detail with reference to the drawings and the following detailed description.

Referring to fig. 1 to 3, the present embodiment provides a small driving mechanism of a permanent magnet motor type, which includes a housing, a transmission shaft 7, a pair of electromagnets 2, an elastic reset component, a main gear 1, a permanent magnet motor rotor 5, a permanent magnet motor stator 8, a driven gear 4, and a rack transmission rod 6. The transmission shaft 7 is rotatably and horizontally arranged in the inner cavity of the shell, the pair of electromagnets 2 are oppositely arranged, and one of the electromagnets 2 is fixed at one end of the transmission shaft 7. The elastic reset component is fixedly connected between the transmission shaft 7 and the inner cavity of the shell and has the function of resetting the transmission shaft 7. The main gear 1 is fixedly installed on the transmission shaft 7, the shell is fixedly connected with the main gear 1, the permanent magnet motor rotor 5 is fixedly installed at the other end of the transmission shaft 7, the permanent magnet motor stator 8 is arranged on the periphery of the permanent magnet motor rotor 5, and the permanent magnet motor stator 8 is matched with the permanent magnet motor rotor 5 to achieve rotation of the motor. A rack transmission bar 6 is arranged between the master gear 1 and the slave gear 4, wherein the rack transmission bar 6 meshes with the master gear 1 and the slave gear 4, respectively. When the reactor works, the permanent magnet motor is electrified and rotates, the transmission shaft 7 is driven by the motor to rotate to drive the main gear 1 to rotate, the main gear 1 transmits driving force to the slave gear 4 through the rack transmission rod 6, and the slave gear 4 drives a control rod in the reactor to move; the permanent magnet motor can rotate forwards and backwards according to requirements. Under the working condition of an accident, coils of a pair of electromagnets 2 are switched on, so that the electromagnets are electrified and obtain magnetism opposite to the magnetism, the electromagnets 2 fixedly connected with one end of a transmission shaft 7 move towards the other electromagnet 2, the transmission shaft 7 is further driven to move along the axial direction, an elastic resetting piece is compressed, the moved transmission shaft 7 further drives a permanent magnet motor rotor 5 to move synchronously, the permanent magnet motor rotor 5 and a permanent magnet motor stator 8 are separated, and meanwhile, a main gear 1 is driven and a driven gear 4 is separated, so that control over a control rod is realized.

In some embodiments, the driving mechanism further comprises a guide block 3, the guide block 3 is fixedly mounted on the transmission shaft 7, wherein the guide block 3 and the inner cavity form a sliding connection along the axial direction of the transmission shaft 7. The guide block 3 is arranged, so that the transmission shaft 7 can be better ensured to reciprocate along the inner cavity of the shell.

In some embodiments, the elastic return assembly comprises a baffle 9 and a compression spring 10, the baffle 9 is mounted between the housing cavity and the transmission shaft 7, and the compression spring 10 is mounted between the baffle 9 and the housing cavity axially along the transmission shaft 7. Wherein, baffle 9 and casing inner chamber constitute the axial slip and link to each other, and baffle 9 links to each other with transmission shaft 7 is fixed simultaneously. Namely, two ends of the transmission shaft 7 are respectively connected with the baffle 9 and the guide block 3 to realize the axial positioning, and the axial position of the transmission shaft 7 in the inner cavity of the shell is determined by the elastic force of the compression spring 10.

In some embodiments, the driving mechanism further comprises a guide cylinder 11, and the rack transmission rod 6 is installed in the inner cavity of the guide cylinder 11, wherein the upper end surface and the lower end surface of the guide cylinder 11 are respectively provided with an opening, and the main gear 1 and the secondary gear 4 are respectively meshed with the rack transmission rod 6 through the openings. The guide cylinder 11 is welded directly to the housing and, via its interior, serves to enclose the toothed rack bar 6. It should be noted here that a rack transmission rod 6 is used, which is used to change the mesh ratio and the output torque between the master gear 1 and the slave gear 4, i.e. functions as a reducer, and the rack transmission rod with different tooth density and size is selected according to actual needs, so as to drive the slave gear to output the required rotation speed and torque. If a mechanical speed reducer is installed, the moment and the rotating speed of the main gear are large, and the matched speed reducer is also large and heavy, so that the advantages of small size and light weight cannot be achieved.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalent technologies, the present invention is also intended to include such modifications and variations.

Claims

1. A permanent magnet motor-type small drive mechanism, comprising:

a housing;

the main gear is fixedly arranged on the transmission shaft;

a slave gear;

2. The permanent magnet motor type small driving mechanism according to claim 1, further comprising a guide block fixedly mounted on the transmission shaft, wherein the guide block and the inner cavity of the housing form a sliding connection along the axial direction of the transmission shaft.

3. The permanent magnet motor type small driving mechanism according to claim 1 or 2, wherein the elastic reset component comprises a baffle plate and a compression spring, the baffle plate is installed and connected between the inner cavity of the housing and the transmission shaft, the compression spring is installed between the baffle plate and the inner cavity of the housing along the axial direction of the transmission shaft, and the baffle plate and the inner cavity of the housing form a sliding connection.

4. The permanent magnet motor type small driving mechanism according to claim 1, further comprising a guiding cylinder, wherein the rack transmission rod is installed in the inner cavity of the guiding cylinder, wherein the upper and lower end surfaces of the guiding cylinder are respectively provided with an opening, and the main gear and the secondary gear are respectively engaged with the rack transmission rod through the openings.