Small impact-resistant electric servo mechanism

Abstract

The utility model relates to the technical field of servo control, in particular to a small impact-resistant electric servo mechanism which comprises a motor mechanism and a transmission mechanism connected through a gear. The motor mechanism comprises a cylindrical casing, a tubular stator embedded in the inner wall of the casing, an end cover used for fixing a rotor and plugging the casing, and the rotor inserted in the casing. The transmission mechanism is a worm and gear mechanism; the structure is simple, the number of parts is small, the impact resistance is high, a special machining method is not involved, and the cost is controllable; the damping effect is good; the whole motor can realize higher overload mechanical impact through damping treatment on the stator, the rotor, the position detection plate and the like; particularly, damping mechanisms are additionally arranged at the front and rear parts of each component, which are in hard contact, and particularly, the side wall restraint and axial elastic movement of an elastic gasket are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of servo control, in particular to a small-sized anti-shock electric servo mechanism. Background Art

[0002] With the development of weapons and equipment, especially the development of high-overload guided shells, the requirements for servos are gradually increasing, and of course the requirements for motors are also increasing. Usually, the mechanical impact level of servos is very high, and it belongs to a special use environment. In the case of unreasonable design, it is difficult to meet the use standards. A power mechanism that improves the overload performance of the product is needed, which can be more widely used in various types of products to help the development of national defense weapons. Utility Model Content

[0003] In order to make up for the above shortcomings, the utility model provides a small impact-resistant electric servo mechanism, which aims to improve the stability problem of the motor mechanism under heavy load.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a small impact-resistant electric servo mechanism, including a motor mechanism and a transmission mechanism connected by gears; the motor mechanism includes: a cylindrical casing, a tubular stator embedded in the inner wall of the casing, an end cover for fixing the rotor and sealing the casing, and a rotor inserted in the casing; the rotor output end is arranged on the casing through a front bearing, the tail of the rotor is connected to the end cover through a rear bearing, a front elastic gasket is further arranged between the front bearing and the casing, and a rear elastic gasket is further arranged between the rear bearing and the end cover; the front elastic gasket is annular, with a V-shaped cross section, and an opening facing the front bearing; the rear elastic gasket is annular, with a V-shaped cross section, and an opening facing the rear bearing; the transmission mechanism is a worm gear mechanism.

[0005] Furthermore, the inner ring flange of the front elastic gasket is vertical and contacts the outer wall of the rotor, and the outer ring flange of the front elastic gasket extends to fit the inner wall of the bearing groove formed by the casing, and the axial length of the outer ring flange of the elastic gasket is greater than the length of the inner ring flange of the front elastic gasket.

[0006] Furthermore, the rear elastic gasket is annular, with a vertical inner ring flange that contacts the outer wall of the rotor, and the outer ring flange of the rear elastic gasket extends to fit the inner wall of the bearing groove formed by the end cover, and the two axial extension lengths of the rear elastic gasket are the same.

[0007] Furthermore, a rear gasket is also arranged between the rear elastic gasket and the rear bearing, and the rear gasket is located between the outer ring flange of the rear elastic gasket and the rear bearing.

[0008] Furthermore, a detection plate is arranged between the stator and the end cover, and a second shock-absorbing pad is arranged between the detection plate and the end cover.

[0009] Furthermore, a pressure ring for fixing the stator is also provided on the inner wall of the casing, and a first shock-absorbing pad is also provided between the pressure ring and the stator.

[0010] Furthermore, the transmission mechanism includes a power wheel fixedly connected to the rotor, a transmission gear connected to the power wheel via an intermediate tooth, the transmission gear is connected to the worm of the worm gear, and a potentiometer is provided on one side of the turbine and an output shaft is provided on the other side.

[0011] The utility model has the following beneficial effects:

[0012] The structure is simple, with few parts, strong impact resistance, no special processing methods involved, and controllable cost. Good shock absorption effect: Through the shock absorption treatment of the stator, rotor, position detection plate, etc., the entire motor can achieve a higher overload mechanical impact. In particular, shock absorption mechanisms are added to the front and rear hard contact parts of each component, especially the side wall constraints and axial elastic activities of the elastic gasket.

[0013] The front elastic gasket has different axial extension lengths, which can achieve two-level buffering. The greater the forward stroke of the rotor, the greater the resistance it encounters. The combination of the rear gasket and the rear elastic gasket also plays a similar role. The greater the stroke of the rear seat of the rotor, the greater the resistance it encounters, one is the outer ring flange, and the other is the obstruction of the inner ring.

[0014] The transmission mechanism adopts the same design concept as the motor, which can well protect the transmission part from damage. In principle, it mainly adopts rubber vibration reduction and elastic gasket vibration reduction, and finally adopts the principle of hard contact of mechanical structure, which has low manufacturing cost, convenient installation, and saves installation space; it can play a good shock absorption effect.

[0015] Due to the simplicity of parts and strong processing technology, the production cycle of the servo design is shortened, which conforms to the design concept of guided weapons. It can be widely used in structural design and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional schematic diagram of the appearance of the device proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the transmission structure of the device proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the motor of the device proposed by the utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the tail of the motor of the device proposed by the utility model;

[0020] Figure 5This is a schematic diagram of the cross-sectional structure of the motor output end of the device proposed by the utility model.

[0021] Legend:

[0022] 1 impact-resistant motor, 2 transmission gear, 3 worm gear assembly, 4 potentiometer assembly, 5 output shaft, 6 housing assembly, 7 power wheel;

[0023] 11 end cover, 12 rear elastic gasket, 13 rear gasket, 14 rear bearing, 15 first vibration damping pad, 16 stator, 17 housing, 18 front bearing, 19 rotor, 110 front elastic gasket, 111 pressure ring, 112 detection plate, 113 second vibration damping pad. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference Figures 1 to 5 The utility model provides an embodiment: a small impact-resistant electric servo mechanism, which includes a motor mechanism and a transmission mechanism connected by gears; the motor mechanism includes: a cylindrical housing 17, a tubular stator 16 embedded in the inner wall of the housing 17, an end cover 11 for fixing the rotor 19 and blocking the housing 17, and a rotor 19 inserted in the housing 17; the output end of the rotor 19 is arranged on the housing 17 through a front bearing 18, the tail of the rotor 19 is connected to the end cover 11 through a rear bearing 14, a front elastic gasket 110 is further arranged between the front bearing 18 and the housing 17, and a rear elastic gasket 12 is further arranged between the rear bearing 14 and the end cover 11; the front elastic gasket 110 is annular, the cross section is V-shaped, and the opening faces the front bearing 18; the rear elastic gasket 12 is annular, the cross section is V-shaped, and the opening faces the rear bearing 14; the transmission mechanism is a worm gear mechanism. The transmission mechanism is located in the housing assembly 6.

[0026] Double elastic gaskets and double vibration-damping pads buffer the axial impact force of the rotor, and multiple resistance settings make the resistance exerted on the rotor proportional to the rotor stroke.

[0027] like Figure 3 , 5As shown, the inner ring flange of the front elastic gasket 110 is vertical and contacts the outer wall of the rotor 19, and the outer ring flange of the front elastic gasket 110 extends and fits the inner wall of the bearing groove formed by the housing 17, and the axial length of the outer ring flange of the elastic gasket 110 is greater than the length of the inner ring flange of the front elastic gasket 110. The long and short extensions are stressed first, and when the formation is further increased, the short flange continues to be stressed to provide more support, so that the resistance support is more during a large impact, and the linearity is large.

[0028] like Figure 3 , 4 As shown, the rear elastic gasket 12 is annular, and the inner ring flange is vertical, which contacts the outer wall of the rotor 19, and the outer ring flange of the rear elastic gasket 12 extends to fit the inner wall of the bearing groove formed by the end cover 11, and the two axial extension lengths of the rear elastic gasket 12 are the same. A rear gasket 13 is also arranged between the rear elastic gasket 12 and the rear bearing 14, and the rear gasket 13 is located between the outer ring flange of the rear elastic gasket 12 and the rear bearing 14. The two outer convex extensions have the same axial extension, but the rear gasket 13 increases the force point of the outer flange in disguised form. The rotor 19 moves backward and first presses the outer convex extension. When the pressing stroke is greater than the thickness of the rear gasket 13, the inner flange will be stressed together.

[0029] A detection plate 112 is provided between the stator 16 and the end cover 11, and a second shock-absorbing pad 113 is also provided between the detection plate 112 and the end cover 11. A pressure ring 111 for fixing the stator 16 is also provided on the inner wall of the housing 17, and a first shock-absorbing pad 15 is also provided between the pressure ring 111 and the stator 16. The transmission mechanism includes a power wheel 7 fixedly connected to the rotor 19, a transmission gear 2 connected to the power wheel 7 through an intermediate tooth, the transmission gear 2 is connected to the worm 3 of the worm gear, a potentiometer 4 is provided on one side of the turbine, and an output shaft 5 is provided on the other side.

[0030] The anti-super-high overload electric servo mechanism of the utility model has strong impact resistance. When subjected to a large impact force, it mainly protects easily damaged parts such as motors, bearings, potentiometers, etc., so as to ensure that the whole machine structure can work normally after being subjected to a large impact, and ensure the normal clearance of the structure.

[0031] The principle of shock-resistant motor is as follows Figure 4As shown, when subjected to backward impact force, the rotor 19 will generate impact force backward. The rear elastic gasket 12 is designed with a boss at the center position, which is deformed by the pressure of the rear bearing 14 and plays a certain buffering role. The rotor 19 transmits force through the rear bearing 14, the rear elastic gasket 12 and the end cover 11. At this time, the inner ring of the rear bearing 14 is the main force-bearing component, forming a mechanical limit, and the impact force of the rotor 19 is borne by the strength of the mechanical structure itself. The effective stroke of the rear elastic gasket 12 is greater than the movable gap between the end cover 11 and the rotor 19, ensuring that it can return to its original shape after being compressed. The rear gasket 13 plays the role of gap adjustment and can be made into different thicknesses for gap adjustment.

[0032] The boss designed at the center of the front elastic gasket 110 of the utility model is the inner ring flange of the front elastic gasket 110, which is used for limiting the mechanical structure.

[0033] When the impact-resistant motor is subjected to forward impact, Figure 5 As shown, the front elastic gasket 110 is deformed by pressure and plays a certain buffering role. The rotor 19 and the housing 17 compress the front elastic gasket 110 through the front bearing 18. The inner ring of the front bearing 18 is the main force-bearing part. When the mechanical stroke is reached, the inner ring of the front bearing 18 is in direct contact with the boss of the front elastic gasket 110, and a mechanical limit is formed through the housing 17. Similarly, the effective stroke of the front elastic gasket 110 is greater than the movable gap between the housing 17 and the rotor 19, ensuring that it can return to its original shape after being compressed.

[0034] The center of the front elastic gasket 110 described in the utility model is designed with an inner ring protrusion for mechanical structure limitation. The bearings must be equipped with a rigid inner ring sleeve to bear greater impact force. A first vibration damping pad 15 is designed between the stator 16 and the pressure ring 111, and the pressure ring 111 is mechanically limited by the end cover 11. At the same time, the stator 16 and the casing 17 are installed by interference fit. The front end of the stator 16 and the casing 17 is filled with a sufficient amount of silicone rubber to play a buffering role. The detection plate 112 described in the utility model is bonded to the stator 16 by a glue layer, and a second vibration damping pad 113 is designed between the end cover 11 and filled with a sufficient amount of silicone rubber to play a buffering role. The casing 17 described in the utility model is fixedly connected to the end cover 11 by screws.

[0035] After the potentiometer assembly 4 of the utility model is installed by screws, the periphery of the structure should be filled with sufficient silicone rubber for buffering and vibration reduction to ensure normal operation after being impacted. The housing assembly 6 and the impact-resistant motor 1 of the utility model are not limited to specific structural forms, and the structure can be adjusted as required.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A small impact-resistant electric servo mechanism, Features: It includes a motor mechanism and a transmission mechanism connected by gears; The motor mechanism comprises: a cylindrical casing (17), a tubular stator (16) embedded in the inner wall of the casing (17), an end cover (11) for fixing a rotor (19) and sealing the casing (17), and a rotor (19) inserted into the casing (17); the output end of the rotor (19) is arranged on the casing (17) through a front bearing (18), the tail of the rotor (19) is connected to the end cover (11) through a rear bearing (14), a front elastic gasket (110) is further arranged between the front bearing (18) and the casing (17), and a rear elastic gasket (12) is further arranged between the rear bearing (14) and the end cover (11); The front elastic gasket (110) is annular, has a V-shaped cross section, and has an opening facing the front bearing (18); the rear elastic gasket (12) is annular, has a V-shaped cross section, and has an opening facing the rear bearing (14); and the transmission mechanism is a worm gear mechanism.

2. A small impact-resistant electric servo mechanism according to claim 1, Features: The inner ring flange of the front elastic gasket (110) is vertical and contacts the outer wall of the rotor (19), and the outer ring flange of the front elastic gasket (110) extends to fit the inner wall of the bearing groove formed by the casing (17), and the axial length of the outer ring flange of the elastic gasket (110) is greater than the length of the inner ring flange of the front elastic gasket (110).

3. A small impact-resistant electric servo mechanism according to claim 1, Features: The rear elastic gasket (12) is annular, with a vertical inner ring flange that contacts the outer wall of the rotor (19), and the outer ring flange of the rear elastic gasket (12) extends to fit the inner wall of the bearing groove formed by the end cover (11), and the two axial extension lengths of the rear elastic gasket (12) are the same.

4. A small impact-resistant electric servo mechanism according to claim 3, Features: A rear gasket (13) is also provided between the rear elastic gasket (12) and the rear bearing (14); the rear gasket (13) is located between the outer ring flange of the rear elastic gasket (12) and the rear bearing (14).

5. A small shock-resistant electric servo mechanism according to any one of claims 1 to 4, Features: A detection plate (112) is arranged between the stator (16) and the end cover (11), and a second shock-absorbing pad (113) is also arranged between the detection plate (112) and the end cover (11).

6. A small shock-resistant electric servo mechanism according to claim 5, Features: The inner wall of the casing (17) is also provided with a pressure ring (111) for fixing the stator (16), and a first shock-absorbing pad (15) is also provided between the pressure ring (111) and the stator (16).

7. A small shock-resistant electric servo mechanism according to claim 6, Features: The transmission mechanism comprises a power wheel (7) fixedly connected to a rotor (19), a transmission gear (2) connected to the power wheel (7) via an intermediate tooth, the transmission gear (2) being connected to a worm (3) of a worm gear, a potentiometer (4) being arranged on one side of the turbine and an output shaft (5) being arranged on the other side.

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