Structure for reducing electromagnetic radiation of shaft extension part of motor

Abstract

The invention provides a structure for reducing electromagnetic radiation of a motor shaft extension part. The structure comprises a rotor shaft, a front end cover and a stop block assembly. One end of the rotor shaft is fixedly connected with an armature. A machine base is arranged on the periphery of the rotor shaft. And the front end of the base is blocked by a front end cover. The front end cover is provided with a shaft hole for a rotor shaft to pass through. And the stop block assembly is accommodated in a gap between the rotor shaft and the shaft hole. The stop block assembly can be divided into a stop block I and a stop block II. The check block I and the check block II are both rotary bodies. And the baffle block I and the baffle block II are meshed at the contact surface. And a gap between the contact surfaces of the stop block I and the stop block II forms an electromagnetic compatibility channel. And the electromagnetic compatibility channel is bent and extends from the front end to the rear end of the stop block assembly. When electromagnetic waves pass through the electromagnetic compatibility channel, the numerical value of electromagnetic radiation is reduced due to the fact that the collision frequency of electron motion is increased and the electromagnetic waves collide with the electromagnetic compatibility channel. Under the normal condition of the motor, the electromagnetic radiation value of the shaft extension part of the motor is small, the use requirement is met, and the use reliability of weaponry can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic compatibility of motors, and in particular to a structure for reducing electromagnetic radiation at a shaft extension of a motor. Background Art

[0002] With the development of weapons and equipment, more and more requirements are placed on the functions of motors used in weapons and equipment. Since there are many sensitive electronic components in weapons and equipment, in order to ensure the normal use of weapons and equipment, the motors used in weapons and equipment usually have electromagnetic compatibility requirements. As an indispensable and widely used actuator in weapons and equipment, ensuring the electromagnetic compatibility of the motor during design is conducive to the normal operation of the motor under special conditions and the normal use of weapons and equipment.

[0003] For motors with electromagnetic compatibility requirements, in order to meet the requirements of reducing electromagnetic radiation during the assembly process, the conventional practice is to meet the requirements by reducing the gap. However, during the manufacturing process, the following problems occur: since there is always a gap between the shaft extension of the rotating component and the front end cover, the electromagnetic radiation cannot be effectively reduced, which affects the deviation of other parts of the weapon equipment and cannot meet the use requirements.

[0004] Therefore, it is of great significance to develop a structure that reduces the electromagnetic radiation of the motor shaft extension. Summary of the invention

[0005] The purpose of the present invention is to provide a structure for reducing electromagnetic radiation at a motor shaft extension portion, so as to solve the problems existing in the prior art.

[0006] The technical solution adopted to achieve the purpose of the present invention is as follows: a structure for reducing electromagnetic radiation at the motor shaft extension part, including a rotor shaft, a front end cover and a stop block assembly.

[0007] An armature is fixedly connected to one end of the rotor shaft. A magnetic pole assembly is arranged inside the armature. The magnetic pole assembly is used to accurately control the motor speed. A base is arranged on the periphery of the rotor shaft. The front end of the base is sealed with a front end cover. The front end cover is provided with an axial hole for the rotor shaft to pass through.

[0008] The block assembly is a circular cylinder as a whole. The block assembly is sleeved on the rotor shaft. The block assembly is accommodated in the gap between the rotor shaft and the shaft hole. The block assembly can be split into block I and block II. Both block I and block II are rotating bodies. Block I and block II are meshed at the contact surface. The gap between the contact surfaces of block I and block II forms an electromagnetic compatibility channel. The electromagnetic compatibility channel bends and extends from the front end to the rear end of the block assembly. When electromagnetic waves pass through the electromagnetic compatibility channel, the value of electromagnetic radiation will be reduced due to the increase in the frequency of collisions of electron movement and the collision with the electromagnetic compatibility channel.

[0009] Furthermore, conductive glue is applied in the gap between the stopper I and the stopper II, and in the gap between the stopper assembly and the rotor shaft and the front end cover.

[0010] Furthermore, the block I includes a block body I, a flange I and a flange II. The block body I, flange I and flange II are all annular cylinders. Flange I and flange II are arranged on the rear end surface of the block body I. Flange I surrounds the periphery of flange II. The inner diameter of the block body I is r1, and the outer diameter is r2. The inner diameter of flange I is r3, and the outer diameter is r2. The inner diameter of flange II is r4, and the outer diameter is r5. Among them, r1<r4<r5<r3<r2.

[0011] The block II includes a block body II, a flange III and a flange IV. The block body II, flange III and flange IV are all annular cylinders. The inner diameters of the block body II, flange III and flange IV are the same. Flange III is arranged on the rear end face of the block body II, and flange IV is arranged on the front end face. The outer diameter of the block body II is greater than the outer diameters of flanges III and flange IV. An annular groove is also arranged on the front end face of the block body II. The annular groove is arranged around flange IV.

[0012] The stopper II is nested in the inner cavity of the stopper I. After the stopper I and the stopper II are assembled, they are sleeved on the shaft extension part of the rotor shaft. The rotor shaft extends into the inner cavity of the stopper II. The flange IV is inserted into the inner cavity of the stopper body I. The flange II is inserted into the annular groove.

[0013] Furthermore, a cover plate is provided on the front end surface of the front end cover. The cover plate extends in the direction of the shaft hole. The cover plate covers the front end surface of the block body I, limiting the axial movement of the block I along the rotor shaft. A clamping ring is sleeved on the rotor shaft. The clamping ring covers the front end surface of the flange IV, limiting the axial movement of the block II along the rotor shaft.

[0014] Furthermore, the cover plate and the front end cover are assembled together using screws.

[0015] Furthermore, an adjusting gasket is provided between the clamping ring and the flange IV.

[0016] The technical effect of the present invention is unquestionable: under normal circumstances, the electromagnetic radiation value of the motor shaft extension is small and meets the use requirements, which can improve the reliability of the use of weapons and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure to reduce electromagnetic radiation from the motor shaft extension;

[0018] Figure 2 Structural diagram for reducing electromagnetic radiation at the motor shaft extension;

[0019] Figure 3 It is a schematic diagram of the block structure;

[0020] In the figure: armature 1, front end cover 2, stopper I 3, stopper II 4, adjusting washer 5, clamping ring 6, cover plate 7, screw 9. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0022] Embodiment 1:

[0023] See also Figure 1 and Figure 2 This embodiment provides a structure for reducing electromagnetic radiation at the motor shaft extension part, including a rotor shaft, a front end cover 2 and a block assembly.

[0024] An armature 1 is fixedly connected to one end of the rotor shaft. A magnetic pole assembly is arranged inside the armature 1. The magnetic pole assembly is used to accurately control the motor speed. A base is arranged on the periphery of the rotor shaft. The front end of the base is blocked by a front end cover 2. The front end cover 2 is provided with an axial hole for the rotor shaft to pass through.

[0025] See also Figure 3 , the block assembly is a circular cylinder as a whole. The block assembly is sleeved on the rotor shaft. The block assembly is accommodated in the gap between the rotor shaft and the shaft hole. The block assembly can be split into block I3 and block II4. The block I3 and block II4 are both rotating bodies. The block I3 and block II4 are meshed at the contact surface. The gap between the contact surfaces of the block I3 and block II4 forms an electromagnetic compatibility channel. The electromagnetic compatibility channel bends and extends from the front end to the rear end of the block assembly. When electromagnetic waves pass through the electromagnetic compatibility channel, the value of electromagnetic radiation will be reduced due to the increase in the frequency of collisions of electron movement and the collision with the electromagnetic compatibility channel.

[0026] Embodiment 2:

[0027] The main contents of this embodiment are the same as those of Embodiment 1, wherein conductive glue is applied in the gaps between the stopper I3 and the stopper II4, and in the gaps between the stopper assembly and the rotor shaft and the front end cover 2.

[0028] Embodiment 3:

[0029] The main contents of this embodiment are the same as those of Embodiment 1 or 2, wherein the block I3 includes a block body I301, a flange I302 and a flange II303. The block body I301, the flange I302 and the flange II303 are all annular cylinders. The rear end surface of the block body I301 is provided with a flange I302 and a flange II303. The flange I302 surrounds the periphery of the flange II303. The inner diameter of the block body I301 is r1, and the outer diameter is r2. The inner diameter of the flange I302 is r3, and the outer diameter is r2. The inner diameter of the flange II303 is r4, and the outer diameter is r5. Among them, r1<r4<r5<r3<r2.

[0030] The stopper II4 includes a stopper body II401, a flange III402 and a flange IV403. The stopper body II401, the flange III402 and the flange IV403 are all annular cylinders. The inner diameters of the stopper body II401, the flange III402 and the flange IV403 are the same. The flange III402 is arranged on the rear end face of the stopper body II401, and the flange IV403 is arranged on the front end face. The outer diameter of the stopper body II401 is greater than the outer diameters of the flange III402 and the flange IV403. An annular groove 404 is also arranged on the front end face of the stopper body II401. The annular groove 404 is arranged around the flange IV403.

[0031] The stopper II4 is nested in the inner cavity of the stopper I3. The stopper I3 and the stopper II4 are assembled and sleeved on the shaft extension of the rotor shaft. The rotor shaft extends into the inner cavity of the stopper II4. The flange IV403 is inserted into the inner cavity of the stopper body I301. The flange II303 is inserted into the annular groove 404.

[0032] Embodiment 4:

[0033] The main contents of this embodiment are the same as those of Embodiment 3, wherein a cover plate 7 is provided on the front end surface of the front end cover 2. The cover plate 7 extends in the direction of the shaft hole. The cover plate 7 covers the front end surface of the block body I301, limiting the movement of the block I3 along the axial direction of the rotor shaft. A clamping ring 6 is sleeved on the rotor shaft. The clamping ring 6 covers the front end surface of the flange IV403, limiting the movement of the block II4 along the axial direction of the rotor shaft. The cover plate 7 and the front end cover 2 are assembled together by screws 8. An adjusting washer 5 is also provided between the clamping ring 6 and the flange IV403.

Claims

1. A structure for reducing electromagnetic radiation at the motor shaft extension, characterized in that: It comprises a rotor shaft, a front end cover (2) and a stopper assembly; An armature (1) is fixedly connected to one end of the rotor shaft; a magnetic pole assembly is arranged inside the armature (1); the magnetic pole assembly is used to accurately control the speed of the motor; a base is arranged on the periphery of the rotor shaft; a front end cover (2) is used to seal the front end of the base; a shaft hole for the rotor shaft to pass through is opened on the front end cover (2); The block assembly is a circular cylinder as a whole; the block assembly is sleeved on the rotor shaft; the block assembly is accommodated in the gap between the rotor shaft and the shaft hole; the block assembly can be split into block I (3) and block II (4); the block I (3) and block II (4) are both rotating bodies; the block I (3) and block II (4) are meshed at the contact surface; the gap between the contact surfaces of the block I (3) and block II (4) forms an electromagnetic compatibility channel; the electromagnetic compatibility channel is bent and extended from the front end of the block assembly to the rear end; when the electromagnetic wave passes through the electromagnetic compatibility channel, the value of the electromagnetic radiation is reduced due to the increase in the frequency of collisions of electron movement and the collision with the electromagnetic compatibility channel.

2. The structure for reducing electromagnetic radiation at the motor shaft extension according to claim 1, characterized in that: Conductive glue is applied in the gap between the stopper I (3) and the stopper II (4), and in the gap between the stopper assembly and the rotor shaft and the front end cover (2).

3. The structure for reducing electromagnetic radiation at the motor shaft extension according to claim 1, characterized in that: The stopper I (3) comprises a stopper body I (301), a flange I (302) and a flange II (303); the stopper body I (301), the flange I (302) and the flange II (303) are all annular cylinders; the rear end surface of the stopper body I (301) is provided with flange I (302) and flange II (303); the flange I (302) surrounds the periphery of flange II (303); the inner diameter of the stopper body I (301) is r1, and the outer diameter is r2; the inner diameter of the flange I (302) is r3, and the outer diameter is r2; the inner diameter of the flange II (303) is r4, and the outer diameter is r5; wherein, r1<r4<r5<r3<r2; The block II (4) comprises a block body II (401), a flange III (402) and a flange IV (403); the block body II (401), the flange III (402) and the flange IV (403) are all annular cylinders; the inner diameters of the block body II (401), the flange III (402) and the flange IV (403) are the same; the flange III (402) is arranged on the rear end face of the block body II (401), and the flange IV (403) is arranged on the front end face; the outer diameter of the block body II (401) is greater than the outer diameters of the flange III (402) and the flange IV (403); the front end face of the block body II (401) is also provided with an annular groove (404); the annular groove (404) is arranged around the flange IV (403); The stopper II (4) is nested in the inner cavity of the stopper I (3); after the stopper I (3) and the stopper II (4) are assembled, they are sleeved on the shaft extension part of the rotor shaft; the rotor shaft extends into the inner cavity of the stopper II (4); the flange IV (403) is inserted into the inner cavity of the stopper body I (301); the flange II (303) is inserted into the annular groove (404).

4. The structure for reducing electromagnetic radiation at the motor shaft extension according to claim 3 is characterized in that: A cover plate (7) is arranged on the front end surface of the front end cover (2); the cover plate (7) extends in the direction of the shaft hole; the cover plate (7) covers the front end surface of the block body I (301) to limit the axial movement of the block I (3) along the rotor shaft; a clamping ring (6) is sleeved on the rotor shaft; the clamping ring (6) covers the front end surface of the flange IV (403) to limit the axial movement of the block II (4) along the rotor shaft.

5. The structure for reducing electromagnetic radiation at the motor shaft extension according to claim 4, characterized in that: The cover plate (7) and the front end cover (2) are assembled together using screws (8).

6. The structure for reducing electromagnetic radiation at the motor shaft extension according to claim 4, characterized in that: An adjusting washer (5) is also provided between the clamping ring (6) and the flange IV (403).

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