Motor limiting signal output structure with backup limited angle and motor

Abstract

The invention relates to the technical field of motors, in particular to a motor limiting signal output structure with a backup limited angle and a motor, comprising a brush carrier ring assembly and a slip ring assembly arranged in a center hole of the brush carrier ring assembly; the brush holder ring assembly comprises a brush holder ring and four brush wire pairs, and each brush wire pair comprises two parallel brush wires; the four brush wire pairs are annularly and uniformly distributed on the brush holder ring, the four brush wire pairs are sequentially a first brush wire pair, a second brush wire pair, a third brush wire pair and a fourth brush wire pair in the clockwise direction, the first brush wire pair and the third brush wire pair are insurance signal brush wire pairs, and the second brush wire pair and the fourth brush wire pair are insurance signal release brush wire pairs; the slip ring assembly comprises a slip ring body and two reversing blocks, and the two reversing blocks are symmetrically embedded in the outer cylindrical surface of the slip ring body by 180 degrees; and the outer cambered surface of the reversing block is coplanar with the outer cylindrical surface of the slip ring body. The limited angle motor comprises the limiting signal output structure.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a limited rotation angle motor with backup limit signal output structure and a motor. Background Art

[0002] In limited rotation angle motors for certain applications where the structural space is tight and the volume is small, the motor needs to implement relatively complex functional structures within an extremely limited space. For example, for a limited rotation angle motor used for insurance purposes, it is required to implement the conversion of insurance signals and the limit function within the required rotation angle range. During the design process of the motor, due to the excessive volume of the insurance function structure, the reserved space for the electromagnetic part of the motor is insufficient, resulting in the reduction of the electromagnetic performance of the motor, and the maximization of the motor performance within the limited space is not achieved.

[0003] For example, the patent application with the publication number CN117254658A discloses a self-feedback bidirectional limited rotation angle motor, which includes a slip ring device for monitoring the position of the motor shaft and transmitting it through a wire.

[0004] In the current slip ring structure, a single brush pair is often used to contact the commutator segment to achieve signal conduction. However, a single brush pair is prone to damage, which may lead to motor failure. In addition, for a limited rotation angle motor used for insurance purposes, multiple brush pairs need to be arranged to meet the functions of insurance signals and deinsurance signals. Therefore, how to arrange multiple brush pairs and achieve the backup function is an urgent problem to be solved. Summary of the Invention

[0005] The main purpose of the present invention is to propose a limit signal output structure and a motor for a limited rotation angle motor, aiming to solve the above technical problems.

[0006] To achieve the above purpose, on the one hand, the present invention proposes a limited rotation angle motor with backup limit signal output structure, which includes a brush holder ring assembly and a slip ring assembly arranged in the central hole of the brush holder ring assembly; the brush holder ring assembly includes a brush holder ring and four brush pairs, and each brush pair includes two parallel brush wires; the four brush pairs are evenly distributed in a ring on the brush holder ring, and the four brush pairs are sequentially the first brush pair, the second brush pair, the third brush pair, and the fourth brush pair in the clockwise direction, where the first brush pair and the third brush pair are insurance signal brush pairs, and the second brush pair and the fourth brush pair are deinsurance signal brush pairs; the slip ring assembly includes a slip ring body and commutator blocks, and the number of the commutator blocks is two, which are symmetrically inlaid on the outer cylindrical surface of the slip ring body at 180 degrees; the outer arc surface of the commutator block is coplanar with the outer cylindrical surface of the slip ring body.

[0007] Preferably, the cross-section of the commutator block is in an I shape; the slip ring body is filled into the groove bodies on both sides of the commutator block.

[0008] Preferably, the brush holder ring is made of polyetherketone; and the slip ring body is made of polyacetal resin.

[0009] Preferably, the first brush filament pair and the third brush filament pair are arranged parallel to each other and spaced apart; the second brush filament pair and the fourth brush filament pair are arranged parallel to each other and spaced apart; the first brush filament pair and the second brush filament pair are perpendicular to each other.

[0010] Preferably, a clearance groove is provided on the brush holder ring, and the brush wire pair is installed at the position of the clearance groove.

[0011] Preferably, a brush installation hole is opened on one of the side walls of the give way groove, the brush centering brush is inserted into the brush installation hole, and the brush installation hole is filled with adhesive.

[0012] On the other hand, the present invention also proposes a motor, comprising the above-mentioned motor limit signal output structure with backup limited angle; also comprising a shell, a stator and a rotor arranged inside the shell; the brush holder ring assembly is installed in the inner cavity of the shell near the tail end; the slip ring assembly is sleeved on the rotating shaft of the rotor; a rear end cover is installed at the tail end of the shell, and the brush holder ring and the rear end cover are fastened together by a cross pan head screw; a front end cover is installed at the front end of the shell.

[0013] Preferably, the slip ring assembly includes a slip ring bushing embedded in the slip ring body, and two arc-shaped grooves are arranged on the slip ring bushing; two limit pins are installed on the rear end cover, and the front ends of the two limit pins extend into the two arc-shaped grooves respectively; a through hole is arranged in the center of the slip ring bushing and is mounted on the rotating shaft of the rotor.

[0014] Preferably, two depressions are arranged on the outer circumference of the slip ring bushing, and the two depressions are arranged 180 degrees symmetrically; a plurality of tooth grooves are arranged on the outer circumference of the slip ring bushing; the slip ring body is made by injection molding, and the inner wall of the slip ring body is filled into the depressions and tooth grooves; the commutator block is arranged at the depressed position.

[0015] Preferably, a front bearing is installed on the front end cover, and a rear bearing is installed on the rear end cover, and both ends of the rotor shaft are respectively inserted into the inner holes of the front bearing and the rear bearing; a first adjustment washer is arranged between the front end cover and the front bearing; and a second adjustment washer is arranged between the rear end cover and the rear bearing.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0017] (1) By adopting the limit signal output structure provided by the present invention, since four brush wire pairs are provided and two commutator blocks are symmetrically inlaid on the outer cylindrical surface of the slip ring body at 180 degrees. The four brush wire pairs are divided into two groups, one group is the arming signal and the other group is the safety signal, and each group of signals includes two brush wire pairs. During operation, the two commutator blocks can simultaneously contact two brush wire pairs in the same group of signals, that is, in the same group of signals, when one brush wire pair is conducting, the other brush wire pair is also conducting. Therefore, a backup function can be realized, that is, when one brush wire pair in the same group of signals fails, the other brush wire pair can still work normally. The stability and reliability of the motor are improved.

[0018] (2) The present invention realizes the on-off function of the signal through the cooperation of the brush holder ring assembly and the slip ring assembly, and through the intermittent contact between the brush wire pair and the commutator block; the limit function of the motor is realized by using the limit structure formed by the cooperation of the limit pin and the arc-shaped sunk groove. Through the above structure, the integrity of the limit signal output function is realized within a limited space. In addition, through the symmetrical design of the brush wire pair, a backup function is realized, increasing the reliability of the device operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0020] Figure 1 Schematic diagram of the limit signal output structure provided by the present invention Figure One ;

[0021] Figure 2 Schematic diagram of the limit signal output structure provided by the present invention Figure Two

[0022] Figure 3 Front view of the brush holder ring assembly in the present invention;

[0023] Figure 4 Left view of the brush holder ring assembly in the present invention;

[0024] Figure 5 Structural schematic diagram of the slip ring assembly in the present invention;

[0025] Figure 6 For Figure 5 Cross-sectional view along B-B in

[0026] Figure 7It is a schematic structural diagram of the slip ring bushing in the present invention;

[0027] Figure 8 is Figure 7 a cross-sectional view along C-C in;

[0028] Figure 9 It is a schematic diagram of the limited rotation angle motor provided by the present invention.

[0029] Explanation of the reference numerals in the attached drawings: 1. Brush holder ring assembly; 101. Brush holder ring; 102a. First brush wire pair; 102b. Second brush wire pair; 102c. Third brush wire pair; 102d. Fourth brush wire pair; 103. Relief groove; 104. Brush wire mounting hole; 2. Slip ring assembly; 201. Slip ring body; 202. Commutator block; 203. Slip ring bushing; 3. Housing; 4. Stator; 5. Rotor; 6. Rear end cover; 7. Front end cover; 8. Limit pin; 9. Cross recessed head screw; 10. Front bearing; 11. Rear bearing. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0032] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0033] Combined with Figures 1 to 8As shown, on the one hand, this embodiment provides a limited rotation angle motor limit signal output structure with backup, including a brush holder ring assembly 1 and a slip ring assembly 2 arranged in the central hole of the brush holder ring assembly 1; the brush holder ring assembly 1 includes a brush holder ring 101 and four brush wire pairs, and each brush wire pair includes two mutually parallel brush wires, as Figure 3 shown by brush wire A and brush wire B in Figure 3 . The four brush wire pairs are evenly distributed annularly on the brush holder ring 101. The four brush wire pairs are successively the first brush wire pair 102a, the second brush wire pair 102b, the third brush wire pair 102c, and the fourth brush wire pair 102d in the clockwise direction. Among them, the first brush wire pair 102a and the third brush wire pair 102c are insurance signal brush wire pairs, and the second brush wire pair 102b and the fourth brush wire pair 102d are deinsurance signal brush wire pairs; the slip ring assembly 2 includes a slip ring body 201 and a commutator block 202. The number of the commutator blocks 202 is two, and they are symmetrically embedded on the outer cylindrical surface of the slip ring body 201 at 180 degrees; the outer arc surface of the commutator block 202 is coplanar with the outer cylindrical surface of the slip ring body 201. When the commutator block 202 contacts the brush wire pair, signal conduction is achieved, and signal conversion is completed.

[0034] By adopting the above structure, since four brush wire pairs are provided, and two commutator blocks 202 are symmetrically embedded on the outer cylindrical surface of the slip ring body 201 at 180 degrees. The four brush wire pairs are divided into two groups, one group is the deinsurance signal, and the other group is the insurance signal, and each group of signals includes two brush wire pairs. During operation, the two commutator blocks 202 can simultaneously contact two brush wire pairs in the same group of signals. That is, in the same group of signals, when one brush wire pair is conducting, the other brush wire pair is also conducting. Therefore, the backup function can be realized. When one of the brush wire pairs in the same group of signals fails, the other brush wire pair can still work normally. The stability and reliability of the motor are improved.

[0035] As Figure 1 shown in the state of Figure 1 , this state is in the insurance signal state. Specifically, the two commutator blocks 202 are respectively in contact with the first brush wire pair 102a and the third brush wire pair 102c. At this time, the two brush wires on the first brush wire pair 102a are conducting, and the two brush wires on the third brush wire pair 102c are also in the conducting state.

[0036] As Figure 2 shown in the state of Figure 2 , this state is in the deinsurance signal state. Specifically, the two commutator blocks 202 are respectively in contact with the second brush wire pair 102b and the fourth brush wire pair 102d. At this time, the two brush wires on the second brush wire pair 102b are conducting, and the two brush wires on the fourth brush wire pair 102d are also in the conducting state.

[0037] Combined with Figure 5As shown, the cross section of the commutator block 202 is I-shaped; the slip ring body 201 is made by injection molding, and the slip ring body 201 is filled into the grooves on both sides of the commutator block 202, so that the commutator block 202 can be firmly embedded in the slip ring body 201.

[0038] In this embodiment, the brush holder ring 101 is made of polyetherketone, which has extremely high heat resistance and good electrical insulation performance, can be used stably for a long time in harsh environments such as high temperature, and has good wear resistance, high strength, high rigidity, high impact resistance, etc. The material of the slip ring body 201 is polyacetal resin, which has high strength, high wear resistance and self-lubricating properties, which can ensure that the brush wire does not produce excess when it rubs against it for a long time, thereby increasing reliability.

[0039] In this embodiment, the brush wires in the brush wire pair and the commutation block 202 are made of metal materials with low resistivity, so the contact resistance is lower and the output signal is more stable. The metal materials include but are not limited to silver, copper and the like.

[0040] Combination Figure 3 As shown, the first brush wire pair 102a and the third brush wire pair 102c are arranged parallel to each other and spaced apart; the second brush wire pair 102b and the fourth brush wire pair 102d are arranged parallel to each other and spaced apart; the first brush wire pair 102a and the second brush wire pair 102b are perpendicular to each other.

[0041] Furthermore, a clearance groove 103 is provided on the brush holder ring 101, and the brush wire pair is installed at the position of the clearance groove 103. Since the brush wire pair will bend and deform radially along the radial direction when it contacts the outer peripheral surface of the slip ring assembly 2, the purpose of providing the clearance groove 103 is to give way to the bent and deformed brush wire pair.

[0042] Combination Figure 3 As shown, a brush installation hole 104 is opened on one side wall of the give way groove 103, the brush centering brush is inserted into the brush installation hole 104, and the brush installation hole 104 is filled with adhesive to ensure the firmness of the brush after assembly.

[0043] Combination Figure 9 As shown, this embodiment also provides a motor, including the above-mentioned motor limit signal output structure with backup limited angle; also includes a shell 3, a stator 4 and a rotor 5 arranged inside the shell 3; the brush holder ring assembly 1 is installed in the inner cavity of the shell 3 near the tail end; the slip ring assembly 2 is sleeved on the rotating shaft of the rotor 5; a rear end cover 6 is installed at the tail end of the shell 3, and the brush holder ring 101 is fastened to the rear end cover 6 by a cross pan head screw 9; a front end cover 7 is installed at the front end of the shell 3.

[0044] CombinationFigure 5 , Figure 9 As shown in Figure 9 , the slip ring assembly 2 includes a slip ring bushing 203 embedded in the slip ring body 201. Two arc-shaped grooves 203a are provided on the slip ring bushing 203. Two limit pins 8 are installed on the rear end cover 6, and the front ends of the two limit pins 8 respectively extend into the two arc-shaped grooves 203a. A through hole is provided in the center of the slip ring bushing 203 and sleeved on the rotating shaft of the rotor 5. The angle limit of the motor is achieved by using the limit pins 8 and the arc-shaped grooves 203a.

[0045] Combined with Figures 5 to 8 As shown in Figures 5 to 8 , two depressions 203b are provided on the outer periphery of the slip ring bushing 203, and the two depressions 203b are symmetrically arranged at 180 degrees. A plurality of tooth grooves 203c are provided on the outer peripheral surface of the slip ring bushing 203. The slip ring body 201 is made by injection molding, and the inner wall of the slip ring body 201 fills into the depressions 203b and the tooth grooves 203c, which can ensure that the slip ring bushing 203 is firmly embedded in the slip ring body 201. The commutation block 202 is arranged at the position of the depression 203b.

[0046] Combined with Figure 9 As shown in Figure 9 , a front bearing 10 is installed on the front end cover 7, and a rear bearing 11 is installed on the rear end cover 6. The two ends of the rotating shaft of the rotor 5 are respectively inserted into the inner holes of the front bearing 10 and the rear bearing 11. A first adjusting washer 12 is provided between the front end cover 7 and the front bearing 10. A second adjusting washer 13 is provided between the rear end cover 6 and the rear bearing 11. By replacing the first adjusting washer 12 and the second adjusting washer 13 with different thickness specifications, the axial position of the rotor 5 can be adjusted.

[0047] The motor provided by this embodiment realizes the functions of limit, signal conversion, and backup in a limited space through the structure with backup limited rotation angle motor limit signal output.

[0048] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A backup limited-rotation motor limit signal output structure, characterized in that It includes a brush holder ring assembly (1) and a slip ring assembly (2) arranged in the central hole of the brush holder ring assembly (1); The brush holder ring assembly (1) includes a brush holder ring (101) and four brush wire pairs. Each brush wire pair includes two mutually parallel brush wires; the four brush wire pairs are annularly and evenly distributed on the brush holder ring (101). The four brush wire pairs are successively the first brush wire pair (102a), the second brush wire pair (102b), the third brush wire pair (102c), and the fourth brush wire pair (102d) in the clockwise direction. Among them, the first brush wire pair (102a) and the third brush wire pair (102c) are safety signal brush wire pairs, and the second brush wire pair (102b) and the fourth brush wire pair (102d) are arming signal brush wire pairs; The slip ring assembly (2) includes a slip ring body (201) and a commutator block (202). The number of the commutator blocks (202) is two, and they are symmetrically inlaid on the outer cylindrical surface of the slip ring body (201) at 180 degrees; the outer arc surface of the commutator block (202) is coplanar with the outer cylindrical surface of the slip ring body (201).

2. The limited rotation angle motor limit signal output structure with backup as claimed in claim 1, wherein The cross-section of the commutator block (202) is in an I shape; the slip ring body (201) is filled into the groove bodies on both sides of the commutator block (202).

3. A limited rotation angle motor limit signal output structure with backup as described in claim 1, characterized in that, The material of the brush holder ring (101) is polyether ketone; the material of the slip ring body (201) is polyoxymethylene resin.

4. A limited rotation angle motor limit signal output structure with backup as described in claim 1, characterized in that The first brush wire pair (102a) and the third brush wire pair (102c) are arranged parallel to each other at intervals; the second brush wire pair (102b) and the fourth brush wire pair (102d) are parallel to each other at intervals; the first brush wire pair (102a) is perpendicular to the second brush wire pair (102b).

5. The limited rotation angle motor position-limiting signal output structure with backup as claimed in claim 1, wherein A relief groove (103) is arranged on the brush holder ring (101), and the brush wire pair is installed at the position of the relief groove (103).

6. A limited rotation angle motor limit signal output structure with backup as described in claim 5, characterized in that A brush wire mounting hole (104) is opened on one side wall of the relief groove (103). The brush wires in the brush wire pair are inserted into the brush wire mounting hole (104), and an adhesive is filled in the brush wire mounting hole (104).

7. A motor, characterized in that, It includes the limited rotation angle motor limit signal output structure according to any one of claims 1 to 6; it also includes a housing (3), a stator (4) and a rotor (5) arranged inside the housing (3); the brush holder ring assembly (1) is installed at a position close to the tail end in the inner cavity of the housing (3); the slip ring assembly (2) is sleeved on the rotating shaft of the rotor (5); a rear end cover (6) is installed at the tail end of the housing (3), and the brush holder ring (101) and the rear end cover (6) are fixedly connected by a cross-recessed pan head screw (9); a front end cover (7) is installed at the front end of the housing (3).

8. A motor according to claim 7, characterized in that, The slip ring assembly (2) includes a slip ring bushing (203) inlaid in the slip ring body (201). Two arc-shaped sunk grooves (203a) are arranged on the slip ring bushing (203); two limit pins (8) are installed on the rear end cover (6), and the front ends of the two limit pins (8) respectively extend into the two arc-shaped sunk grooves (203a); a through hole is arranged at the center of the slip ring bushing (203) and it is sleeved on the rotating shaft of the rotor (5).

9. A motor according to claim 8, characterized in that, There are two depressions (203b) provided on the outer periphery of the slip ring bushing (203), and the two depressions (203b) are symmetrically arranged at 180 degrees; a plurality of tooth grooves (203c) are provided on the outer peripheral surface of the slip ring bushing (203); the slip ring body (201) is made by injection molding, and the inner wall of the slip ring body (201) is filled into the depressions (203b) and the tooth grooves (203c); the commutation block (202) is arranged at the position of the depression (203b).

10. A motor according to claim 7, characterized in that, A front bearing (10) is installed on the front end cover (7), and a rear bearing (11) is installed on the rear end cover (6). The two ends of the rotating shaft of the rotor (5) are respectively inserted into the inner holes of the front bearing (10) and the rear bearing (11). A first adjusting washer (12) is provided between the front end cover (7) and the front bearing (10). A second adjusting washer (13) is provided between the rear end cover (6) and the rear bearing (11).

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