CN210566554U

CN210566554U - Proportional control electric actuator

Info

Publication number: CN210566554U
Application number: CN201921577381.4U
Authority: CN
Inventors: 张辉; 瞿德飞; 蒋皓; 向明朗; 王军; 高鹏翔; 侯颖杰; 杨阳; 李贞丽
Original assignee: Mianyang Fulin Precision Machinery Co Ltd
Current assignee: Fulin Precision Co ltd; Mianyang Fulin Jinggong Co ltd; Sichuan Xinzhi Thermal Control Technology Co ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-05-19
Anticipated expiration: 2029-09-20

Abstract

The utility model provides an electronic control actuator for proportional control, which comprises a motor (1), a signal gear piece (6), a first Hall sensor (12), a second Hall sensor (13) and a magnetic ring (15), wherein a permanent magnet (7) is fixedly arranged on the signal gear piece (6), and the magnetic ring (15) forms at least 1 group N, S by radial magnetization; an output shaft of the motor (1) is fixedly connected with the magnetic ring (15), the first Hall sensor (12) and the second Hall sensor (13) are respectively arranged below the magnetic ring (15) and the signal gear piece (6), N, S switching signals generated when the magnetic ring (15) rotates are collected by the first Hall sensor (12), and position signals of the permanent magnet (7) are collected by the second Hall sensor (13). The utility model discloses can realize contactless high accuracy position detection, be favorable to prolonging the life of the automatically controlled executor of proportional control, have the reliability height, noiselessness, make outstanding advantage such as the degree of difficulty is low.

Description

Proportional control electric actuator

Technical Field

The utility model belongs to the technical field of automatically controlled executor structural design and specifically relates to an automatically controlled executor of proportional control who relates to drive electron water valve.

Background

For a new energy vehicle, functional areas such as a three-electrical system and a passenger cabin have clear requirements on temperature ranges, heat exchange media circulate among different loops in real time according to the requirements, and the functional areas can be in the target temperature ranges through heat exchange when the media flow through. For fuel vehicles, functional areas such as the engine, the gearbox and the passenger compartment also have clear requirements for temperature ranges.

An electronic water valve is arranged between the circulation loops as a device for controlling the flow direction or the flow rate of the medium. The electric control actuator is used as a power output mechanism and outputs driving torque to the electronic water valve to help the electronic water valve to realize the switching of working modes.

However, in practical use, the existing electric control actuator of the electronic water valve mainly has the following disadvantages:

1. the electric control actuator can only detect and control two extreme positions at two ends and cannot identify or stop at the middle position, so that the proportional adjustment cannot be realized. Correspondingly, the electronic water valve driven by the electronic water valve only has the opening, closing or reversing functions, cannot simultaneously open multiple ports, cannot realize proportional adjustment, and cannot accurately control the flow of media.

2. The electric control actuator collects position signals by using a contact principle (such as a potentiometer), and parts participating in contact friction have risks of excessive deformation, abrasion, poor contact and the like, so that signal deviation or loss is caused, and noise is generated at the same time.

3. The error generated by the electric control actuator during signal acquisition is directly counted into the total control error, so that the control precision of the electric control actuator is reduced.

4. The connecting parts of the bottom shell, the upper cover and other parts of the electric control actuator are not specially protected, so that the product has low protection performance or is complex to manufacture, and the application range of the product is limited.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: aiming at the problems in the prior art, the proportional control electric actuator is provided, and the service life of the proportional control electric actuator is prolonged.

The to-be-solved technical problem of the utility model adopts following technical scheme to realize: a proportion regulation electric control actuator comprises a motor, a signal gear piece, a first Hall sensor, a second Hall sensor and a magnetic ring, wherein permanent magnets are fixedly arranged on the signal gear piece, and the magnetic ring forms at least 1 group N, S by radial magnetization; the output shaft of the motor is fixedly connected with the magnetic ring, the first Hall sensor and the second Hall sensor are respectively arranged below the magnetic ring and the signal gear piece, the first Hall sensor collects N, S switching signals when the magnetic ring rotates, and the second Hall sensor collects position signals of the permanent magnet.

Preferably, the permanent magnet motor further comprises a third Hall sensor, wherein the third Hall sensor is arranged below the signal gear piece and collects position signals of the permanent magnet.

Preferably, an installation through hole is formed in the magnetic ring, and an interference fit structure is formed between the output shaft of the motor and the installation through hole in the magnetic ring.

Preferably, the magnetic rings form 3 groups or 4 groups N, S by radial magnetization.

Preferably, N, S rings on the magnetic ring are evenly arranged in a staggered mode in the circumferential direction of the magnetic ring.

Preferably, the motor is fixedly installed in an inner cavity of the machine body, the machine body comprises an upper cover and a bottom shell, the upper cover and the bottom shell are fixedly connected to form a hollow cavity structure, a reed is assembled on the upper cover, and the reed tightly presses the motor.

Preferably, a speed reduction transmission structure is formed between the signal gear piece and the output gear piece, an oil seal is fixedly installed on the upper cover, the oil seal is of a hollow annular structure, and the oil seal is sleeved with a raceway sealing part on the output gear piece to form a dynamic sealing structure.

Preferably, a reed placing groove is formed on the upper cover, and a fixed connecting structure is formed between the reed and the reed placing groove.

Preferably, the bottom shell is of a hollow cavity structure, a positioning table is formed in the hollow cavity of the bottom shell, the positioning table supports and positions the circuit connecting plate, and the first hall sensor and the second hall sensor are fixedly mounted on the circuit connecting plate.

Preferably, a permanent magnet mounting hole is formed in the signal gear piece, and an interference fit structure is formed between the permanent magnet and the permanent magnet mounting hole.

Compared with the prior art, the beneficial effects of the utility model are that: when the motor drives the magnetic ring to rotate, N, S switching signals generated when the magnetic ring rotates are collected through the first Hall sensor, meanwhile, the signal gear piece drives the permanent magnet to move synchronously, and position signals of the permanent magnet are collected through the second Hall sensor; when the same acquisition error occurs, the proportional control electric actuator has a certain reduction ratio, the resolution ratio of the rotating angle of the magnetic ring divided by the reduction ratio is the resolution ratio of the rotating angle of the proportional control electric actuator, and the acquisition error is reduced in multiples according to the reduction ratio, so that the non-contact high-precision position detection is realized, the reliability is high, no noise is generated, the manufacturing difficulty is low, and the service life of the proportional control electric actuator is prolonged.

Drawings

Fig. 1 is an explosion diagram of the electric control actuator for proportional control according to the present invention.

Fig. 2 is a schematic view of a transmission principle of the electric control actuator for proportional control of the present invention.

Fig. 3 is a schematic structural view of the upper cover in fig. 1 or fig. 2.

Fig. 4 is a schematic structural view of the transmission gear member in fig. 1 or 2.

Fig. 5 is a schematic structural view of the signal gear member in fig. 1 or 2.

Fig. 6 is a schematic structural diagram of the bottom case in fig. 1 or fig. 2.

Fig. 7 is a schematic structural view of the output gear member of fig. 1 or 2.

Fig. 8 is a schematic magnetic pole diagram (2 groups N, S) of the magnetic ring in fig. 1 or fig. 2.

Fig. 9 is a schematic magnetic pole diagram (3 groups N, S) of the magnetic ring in fig. 1 or fig. 2.

Fig. 10 is a schematic magnetic pole diagram (4 groups N, S) of the magnetic ring in fig. 1 or fig. 2.

Fig. 11 is a schematic diagram of relative positions of the permanent magnet, the hall sensor and the magnetic ring.

Fig. 12 is a schematic diagram of the working relationship between the signal gear piece, the permanent magnet and the hall sensor.

Part label name in the figure: 1-a motor, 2-an upper cover, 3-an oil seal, 4-a worm, 5-a transmission gear part, 6-a signal gear part, 7-a permanent magnet, 8-a bottom shell, 9-an output gear part, 10-a main controller, 11-a circuit connecting plate, 12-a first Hall sensor, 13-a second Hall sensor, 14-a third Hall sensor, 15-a magnetic ring, 16-a reed, 21-a reed placing groove, 22-a welding groove, 23-a stepped hole, 24-a rotating shaft limiting hole, 25-a positioning hole, 51-a transmission large gear ring, 52-a transmission small gear ring, 53-a central hole, 61-a signal small gear ring, 62-a signal large gear ring, 63-a permanent magnet mounting hole, 64-a limiting hole and 81-a welding line, 82-fixed pin, 83-positioning table, 84-positioning pin, 91-output gear ring, 92-torque output connecting groove, 93-raceway sealing part and 94-supporting rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The electric control actuator for proportional control as shown in fig. 1 and fig. 2 mainly comprises a machine body, a motor 1, a transmission gear 5, a signal gear 6, an output gear 9, a circuit connecting plate 11, a first hall sensor 12, a second hall sensor 13 and a magnetic ring 15, the machine body comprises an upper cover 2 and a bottom shell 8, the upper cover 2 and the bottom shell 8 are fixedly connected into a hollow cavity structure, wherein, the specific structure of the upper cover 2 is as shown in fig. 3, a welding groove 22, a rotation shaft limiting hole 24 and a positioning hole 25 are respectively formed on the upper cover 2, the bottom case 8 is a hollow cavity structure as shown in fig. 6, a welding line 81, a fixing pin 82, a positioning table 83 and a positioning pin 84 are respectively formed on the bottom case 8, the positioning pin 84 is matched with the positioning hole 25 on the upper cover 2 to position the relative position between the bottom shell 8 and the upper cover 2; the welding line 81 is matched with the welding groove 22 on the upper cover 2, and the bottom shell 8 and the upper cover 2 are fixedly connected into a hollow cavity structure through ultrasonic welding, vibration friction welding, laser welding and other modes; the positioning table 83 is positioned in the hollow cavity of the bottom shell 8, and the positioning table 83 supports and positions the circuit connecting plate 11; usually, the fixing pin 82 is riveted and fixed by thermal deformation after passing through the corresponding positioning hole on the circuit connecting plate 11, and of course, a detachable fixed connecting structure may be formed between the circuit connecting plate 11 and the bottom case 8 by using a screw; the first Hall sensor 12 and the second Hall sensor 13 are fixedly arranged on the circuit connecting plate 11.

The specific structure of the transmission gear piece 5 is as shown in fig. 4, and a large transmission gear ring 51, a small transmission gear ring 52 and a central hole 53 are respectively formed on the transmission gear piece 5; the specific structure of the signal gear part 6 is as shown in fig. 5, and a signal small gear ring 61, a signal large gear ring 62, a permanent magnet mounting hole 63 and a limit hole 64 are respectively formed on the signal gear part 6; the specific structure of the output gear member 9 is as shown in fig. 7, an output gear ring 91, a torque output connecting groove 92, a raceway sealing portion 93 and a support rod 94 are respectively formed on the output gear member 9, the torque output connecting groove 92 generally adopts a flower-shaped groove as a torque output structure of a proportional control electric actuator, and the support rod 94 and a corresponding assembling hole on the bottom case 8 form clearance fit.

The magnetic rings 15 are magnetized radially to form at least 1 group N, S, as shown in fig. 8, the magnetic rings 15 are magnetized radially to form two pairs of poles, that is, the magnetic rings 15 have 2 groups of polarities N, S, and usually, the 2 groups of polarities N, S are arranged uniformly and alternately at 90 ° along the circumferential direction of the magnetic rings 15. As shown in fig. 9, the magnetic ring 15 is magnetized radially to form three pairs of poles, that is, the magnetic ring 15 has 3 sets of polarities N, S, and usually, the 3 sets of polarities N, S are arranged uniformly and alternately at 60 ° along the circumferential direction of the magnetic ring 15. As shown in fig. 10, the magnetic ring 15 is magnetized radially to form four pairs of poles, that is, the magnetic ring 15 has 4 sets of polarities N, S, and usually, the 4 sets of polarities N, S are arranged uniformly and alternately at 45 ° along the circumferential direction of the magnetic ring 15.

A motor mounting cavity is formed in the inner cavity of the bottom shell 8, as shown in fig. 6, the motor 1 is mounted in the motor mounting cavity, so that the motor 1 can be fixedly mounted in the inner cavity of the machine body. In general, the spring receiving groove 21 may be formed on the upper cover 2, and as shown in fig. 3, the spring 16 may be assembled on the upper cover 2 by forming a fixing connection structure between the spring receiving groove 21 and the spring 16. After the proportional control electric actuator is assembled, the motor 1 can be pressed tightly by the reed 16, so that the motor 1 can be stabilized in the motor mounting cavity on the bottom shell 8, and the working stability of the motor 1 is improved. The output shaft of the motor 1 can be knurled at the connecting part, and then the worm 4, the magnetic ring 15 and the output shaft of the motor 1 form a fixed connecting structure. Usually, the worm 4 and the magnetic ring 15 are respectively provided with a mounting through hole, and an interference fit structure is formed between the output shaft of the motor 1 and the mounting through holes on the worm 4 and the magnetic ring 15, so that the worm 4 and the magnetic ring 15 can synchronously rotate along with the output shaft of the motor 1.

The transmission gear piece 5 be connected with drain pan 8 through the gear pilot pin, the one end of gear pilot pin is fixed on drain pan 8 with the inserts form by moulding plastics, the other end then with the spacing hole 24 cooperation of the pivot that corresponds on the upper cover 2, set up centre bore 53 on transmission gear piece 5, form clearance fit between this centre bore 53 and the gear pilot pin, transmission gear piece 5 uses this gear pilot pin to rotate as the center at the during operation. The shaft limiting hole 24 is mainly used for limiting the deflection of the shaft to avoid the clamping stagnation caused by the change of the center distance of the gear.

The signal gear piece 6 be connected with drain pan 8 through the gear pilot pin, the one end of gear pilot pin is fixed on drain pan 8 with the inserts form by moulding plastics, the other end then cooperates with the spacing hole 24 of the pivot that corresponds on the upper cover 2, form clearance fit between spacing hole 64 on the signal gear piece 6 and the gear pilot pin, signal gear piece 6 uses this gear pilot pin to rotate as the center at the during operation. The permanent magnet 7 is fixedly mounted on the signal gear piece 6, and an interference fit structure is formed between the permanent magnet 7 and a permanent magnet mounting hole 63 on the signal gear piece 6. 2 permanent magnets 7 are arranged, and the 2 permanent magnets 7 are generally in a cylindrical structure and are axially magnetized; the permanent magnet 7 continuously disperses the magnetic field to the peripheral space, and the magnetic field intensity differs depending on the position relative to the permanent magnet 7.

A meshing transmission structure is formed between the worm 4 and the large transmission gear ring 51 on the transmission gear piece 5 so as to reduce speed and increase force, and power is transmitted to the transmission gear piece 5. A meshing transmission structure is formed between the small transmission gear ring 52 on the transmission gear piece 5 and the large signal gear ring 62 on the signal gear piece 6, and a meshing transmission structure is formed between the small signal gear ring 61 on the signal gear piece 6 and the output gear ring 91 on the output gear piece 9, so that a speed reduction transmission structure is formed between the signal gear piece 6 and the output gear piece 9, speed reduction and force increase are realized, and power is transmitted to the output gear piece 9, as shown in fig. 1 and 2.

As shown in fig. 1 and 11, a first hall sensor 12, a second hall sensor 13 and a third hall sensor 14 are fixedly mounted on the circuit connecting plate 11, the first hall sensor 12 and the second hall sensor 13 are respectively arranged below the magnetic ring 15 and the signal gear piece 6, and the third hall sensor 14 is arranged below the signal gear piece 6. The first hall sensor 12 is used for collecting N, S switching signals when the magnetic ring 15 rotates, and the second hall sensor 13 and the third hall sensor 14 are both used for collecting position signals of the permanent magnet 7.

The utility model discloses an automatically controlled executor of proportion regulation is at the during operation, is the rotary motion who controls motor 1 by main control unit 10 on the circuit connection board 11 to realize controlling the position of output gear 9. In particular, the amount of the solvent to be used,

as shown in fig. 12, when the permanent magnet 7 rotates with the signal gear piece 6, the positions of the second hall sensor 13 and the third hall sensor 14, which are located below the signal gear piece 6, relative to the permanent magnet 7 are changed, so that the magnetic field strengths received by the second hall sensor 13 and the third hall sensor 14 are changed; when the magnetic field strength reaches the rotary switch threshold value of the second hall sensor 13 or the third hall sensor 14, the position of the signal gear piece 6 is obtained, wherein the second hall sensor 13 and the third hall sensor 14 respectively detect a limit position. That is, when the permanent magnet 7 approaches the third hall sensor 14, the signal gear member 6 stops at one extreme position, and when the permanent magnet 7 approaches the second hall sensor 13, the signal gear member 6 stops at the other extreme position. Because the signal gear piece 6 and the output gear piece 9 are in meshing transmission, and the relative angles of the signal gear piece and the output gear piece have one-to-one correspondence, the proportional control electric actuator indirectly knows the position of the output gear piece 9, namely the limit position of the proportional control electric actuator is found out.

It should be noted that only one second hall sensor 13 or one third hall sensor 14 is used to collect the signal of the permanent magnet 7, and the function of identifying the extreme position of the proportional control electric actuator can also be realized. However, two groups of the second hall sensor 13 and the third hall sensor 14 are adopted simultaneously, so that the control logic of the proportional control electric actuator is tighter, and the logic error is prevented.

In the process of continuous rotation of the magnetic ring 15, the magnetic field state of the first hall sensor 12 located below the magnetic ring is constantly changed in a staggered manner according to N, S, wherein N is switched to S (or S to N) once, and then the signal received by the first hall sensor 12 is changed once, so that the first hall sensor 12 can indirectly know the rotating angle of the magnetic ring 15 (i.e. the output shaft of the motor 1 and the worm 4) according to the signal change times.

The permanent magnet 7 is matched with the second Hall sensor 13 and the third Hall sensor 14 to find two limit positions of the proportional control electric actuator, so that the proportional control electric actuator can realize the opening, closing or reversing functions of the electronic water valve. When the electronic water valve needs to stop at the middle position to realize the functions of simultaneous opening of multiple ports, proportion adjustment and the like, the motor 1 starts to rotate from the limit position, in the rotating process of the motor 1, the magnetic ring 15 and the first Hall sensor 12 continuously receive, refresh and record the real rotating angle of the motor 1 in real time, and when the magnetic ring 15 rotates to reach the target angle (the first Hall sensor 12 receives the signal change of the target times), the motor 1 stops rotating, so that the middle stop function of the electronic water valve is realized. Through worm 4 and the cooperation of transmission gear spare 5, can realize self-locking function, reverse strength can not make worm 4 rotatory, promptly, after the automatically controlled executor of proportion regulation reaches the target position, motor 1 keeps the position stable, even the external reverse application of rotary torque to output gear spare 9, also can not make the angle change of this automatically controlled executor of proportion regulation.

Because the proportion adjustment electric control actuator forms a determined transmission chain and has a certain reduction ratio, the angle rotated by the magnetic ring 15 is divided by the reduction ratio to be the angle rotated by the actuator. When the worm 4 of the first stage rotates by a certain angle, the rotation angle of the output gear member 9 of the final stage is the rotation angle of the worm 4 divided by the reduction ratio. For example, in the proportional control electric actuator of the electronic water valve, the reduction ratio is generally 300-500, and if the worm 4 (i.e. the magnetic ring 15) of the first stage rotates 90 ° or is identified by the first hall sensor 12, the output gear member 9 of the final stage can theoretically reach the highest resolution of 0.3 ° or 90 °/300, so that high-precision control is realized. In addition, because the permanent magnet 7 assembly for collecting the extreme position signal is arranged on the non-output gear piece and the signal gear piece 6 at the penultimate stage in the embodiment, when the same collection error is generated, the collection error is reduced by times according to a certain reduction ratio due to the certain reduction ratio between the non-output gear piece and the output gear piece 9, so that the precision of the proportional control electric actuator for identifying the extreme position is improved, the non-contact high-precision position detection is realized, the reliability is high, no noise is generated, the manufacturing difficulty is low, and the service life of the proportional control electric actuator is prolonged.

In order to improve the protection effect of the proportional control electric actuator and improve the application range of the proportional control electric actuator, an oil seal 3 can be arranged outside the output gear piece 9, and the oil seal 3 is fixedly arranged on the upper cover 2. Usually, a stepped hole 23 may be formed in the upper cover 2, the oil seal 3 is of a hollow annular structure, the oil seal 3 is press-fitted into the stepped hole 23 of the upper cover 2 in an interference fit manner, a static seal structure is formed between the outer circle of the oil seal 3 and the stepped hole 23 of the upper cover 2, and a dynamic seal structure is formed by sleeving the oil seal 3 and the raceway seal portion 93 of the output gear 9, so as to isolate the inner cavity of the proportional control electric actuator from the external environment.

The above description is only exemplary of the present invention and should not be taken as limiting, and all changes, equivalents, and improvements made within the spirit and principles of the present invention should be understood as being included in the scope of the present invention.

Claims

1. The utility model provides an automatically controlled executor of proportion regulation, includes motor (1) and signal gear spare (6), signal gear spare (6) on fixed mounting permanent magnet (7), its characterized in that: the magnetic ring is characterized by further comprising a first Hall sensor (12), a second Hall sensor (13) and a magnetic ring (15), wherein the magnetic ring (15) is magnetized in the radial direction to form at least 1 group N, S; the output shaft of the motor (1) is fixedly connected with the magnetic ring (15), the first Hall sensor (12) and the second Hall sensor (13) are respectively arranged below the magnetic ring (15) and the signal gear piece (6), N, S switching signals generated when the magnetic ring (15) rotates are collected by the first Hall sensor (12), and position signals of the permanent magnet (7) are collected by the second Hall sensor (13).

2. A proportional control electric actuator as claimed in claim 1, wherein: the permanent magnet motor is characterized by further comprising a third Hall sensor (14), wherein the third Hall sensor (14) is arranged below the signal gear piece (6), and the third Hall sensor (14) collects position signals of the permanent magnet (7).

3. A proportional control electric actuator as claimed in claim 1, wherein: and an installation through hole is formed in the magnetic ring (15), and an interference fit structure is formed between the output shaft of the motor (1) and the installation through hole in the magnetic ring (15).

4. A proportional control electric actuator as claimed in any one of claims 1 to 3, wherein: the magnetic rings (15) form 3 groups or 4 groups N, S by radial magnetization.

5. A proportional control electric actuator as claimed in claim 4, wherein: n, S ring magnetic rings (15) on the magnetic ring (15) are uniformly arranged in a staggered manner in the circumferential direction.

6. A proportional control electric actuator as claimed in any one of claims 1 to 3, wherein: the motor (1) is fixedly arranged in an inner cavity of the machine body, the machine body comprises an upper cover (2) and a bottom shell (8), the upper cover (2) and the bottom shell (8) are fixedly connected into a hollow cavity structure, a reed (16) is assembled on the upper cover (2), and the reed (16) compresses the motor (1).

7. A proportional control electric actuator as claimed in claim 6, wherein: the signal gear spare (6) and output gear spare (9) between form the speed reduction transmission structure, fixed mounting oil blanket (3) on upper cover (2), oil blanket (3) are cavity annular structure, and cup joint between raceway sealing (93) on oil blanket (3) and the output gear spare (9) and form and move seal structure.

8. A proportional control electric actuator as claimed in claim 6, wherein: the reed placing groove (21) is formed in the upper cover (2), and a fixed connecting structure is formed between the reed (16) and the reed placing groove (21).

9. A proportional control electric actuator as claimed in claim 6, wherein: the bottom shell (8) is of a hollow cavity structure, a positioning table is formed in the hollow cavity of the bottom shell (8), the positioning table supports and positions the circuit connecting plate (11), and the first Hall sensor (12) and the second Hall sensor (13) are fixedly installed on the circuit connecting plate (11).

10. A proportional control electric actuator as claimed in any one of claims 1 to 3, wherein: the signal gear piece (6) on form permanent magnet mounting hole (63), permanent magnet (7) and permanent magnet mounting hole (63) between form the interference fit structure.