A DC motor dimming actuator

Abstract

The invention discloses a DC motor dimming actuator, which relates to the technical field of dimming motor actuators, including a motor and a potentiometer, and also including a body shell, a back cover is provided on one side of the body shell, a first mounting hole and a second mounting hole are provided in the body shell, a screw mechanism is provided in the first mounting hole and the second mounting hole, a main gear mechanism is sleeved on the outside of the screw mechanism, the main gear mechanism is threadedly connected with the screw mechanism, a motor is provided in the first mounting hole, a worm is provided on the motor shaft at one end of the motor, the worm is transmission-connected with the two-pole gear mechanism, the secondary gear mechanism is transmission-connected with the main gear mechanism, a potentiometer is provided on one side of the motor, a grounding spring is provided on the potentiometer, one end of the positioning shaft is connected with the back cover, the other end of the positioning shaft is extended to the inside of the secondary gear mechanism, a C-shaped ridge structure is sleeved on the outside of the secondary gear mechanism, and the C-shaped ridge structure is connected with the inner wall of the body shell. It has small size, low noise, strong applicability and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of dimming motor actuators, and in particular to a direct current motor dimming actuator. Background Art

[0002] Generally, when a vehicle is driving in a dark environment, the driver often has to turn on the headlights in order to see the road clearly. When the headlights are turned on, if the light level is not in a good position, it can easily cause dazzle to the drivers of oncoming vehicles.

[0003] In the prior art, a dimming motor actuator is usually installed inside or outside the headlight of a vehicle. The dimming motor actuator is used to adjust the reflector of the headlight to adjust the horizontal position of the light, thereby avoiding dazzling the driver of the oncoming vehicle and improving the safety of the vehicle. At present, the working modes of the dimming motor actuator are mainly manual adjustment and automatic adjustment. The manual adjustment working mode refers to that the driver rotates the sliding switch according to his own needs to adjust the horizontal position of the light. The sliding switch is usually installed on the instrument panel; the automatic adjustment needs to cooperate with the relevant body position sensor to adjust the illumination angle of the light in accordance with the real-time state of the body. The working mode of the automatic adjustment is: the worm on the motor is connected to the secondary gear, and the secondary gear includes the initial end of the gear, the middle part of the gear shaft, and the end of the gear; the initial end of the gear is connected to a small gear, and the end of the gear is connected to a large gear. The secondary gear is installed on the inner side of the housing, and the main gear is also installed on the inner side of the housing. The main gear is connected to the ball screw. When the worm drives the secondary gear to rotate, the small gear drives the main gear to rotate. The rotation of the main gear causes the ball screw to telescope, so that the ball screw pushes the reflector to move to adjust the horizontal position of the light. However, since the restraint force on the secondary gear is relatively weak during the movement, the secondary gear rotates unsteadily, resulting in unstable transmission. Therefore, the dimming motor actuator is prone to unstable transmission, loud noise, and even tooth disengagement during the transmission process. In addition, if the production and installation are not in place, the actuator may get stuck. Therefore, the above problems have become a difficult problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a method for solving the above-mentioned technical problems.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A DC motor dimming actuator comprises a motor and a potentiometer, and also comprises a body shell, a screw mechanism, a main gear mechanism, a secondary gear mechanism, a worm, a positioning shaft, a grounding spring, a back cover and a C-shaped ridge structure, wherein the back cover is provided on one side of the body shell, and a first mounting hole and a second mounting hole are sequentially provided in the body shell from one side to the other side, wherein the screw mechanism is provided in the first mounting hole and the second mounting hole, the main gear mechanism is sleeved on the outside of the screw mechanism, and the main gear mechanism is threadedly connected to the screw mechanism, the motor is provided in the first mounting hole, and a motor shaft at one end of the motor is provided The worm, one side of the worm is provided with the secondary gear mechanism, the worm is transmission-connected with the two-pole gear mechanism, the secondary gear mechanism is transmission-connected with the main gear mechanism, one side of the motor is provided with the potentiometer, the grounding spring is provided on the potentiometer, and one side of the grounding spring is connected with the motor, the other side of the grounding spring is connected with the inner wall of the main body shell, one end of the positioning shaft is connected with the back cover, and the other end of the positioning shaft extends to the inside of the secondary gear mechanism, the C-shaped ridge structure is sleeved on the outside of the secondary gear mechanism, and the C-shaped ridge structure is connected with the inner wall of the main body shell.

[0007] Preferably, the screw mechanism includes a rod-shaped body, a ball head provided at one end of the rod-shaped body, and an external thread structure provided at the outer edge of the other end of the rod-shaped body, wherein the ball head is located in the second mounting hole and the external thread structure is provided in the first mounting hole.

[0008] As a further preference, the main gear mechanism includes a columnar body with an open end and a first straight tooth structure arranged on the outer edge of one end of the columnar body, and an internal thread structure is provided on the inner circumferential wall of the columnar body, and the internal thread structure matches the external thread structure.

[0009] As a further preference, the two-stage gear mechanism includes a first rod-shaped connecting part and a second rod-shaped connecting part connected to one end of the first rod-shaped connecting part, wherein the outer edge of the other end of the first rod-shaped connecting part is provided with a helical tooth mechanism, the helical tooth mechanism is connected to the worm gear transmission, and the outer edge of the second rod-shaped connecting part is provided with a second straight tooth structure, and the second straight tooth structure is meshed with the first straight tooth structure.

[0010] As a further preference, a positioning hole is provided at the other end of the first rod-shaped structure, and the other end of the positioning shaft is arranged in the positioning hole.

[0011] Preferably, it further comprises motor pins, a plurality of motor pins are provided on one side of the motor, and the motor is connected to the potentiometer via the plurality of motor pins.

[0012] Preferably, it further comprises an insert, two annular grooves are provided at both ends of one side of the main body shell, two inserts are arranged in the two annular grooves, and one end of each insert extends into the first mounting hole respectively.

[0013] Preferably, a metal coating is provided on the inner wall of the main body shell, and the metal coating abuts against the shell of the motor.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] In the present invention, by arranging an insert on the main body shell, the gap of the main gear mechanism in the axial direction can be effectively fixed and controlled, and the rotation of the main gear mechanism is not affected. The arranged positioning shaft can limit the movement space of the secondary gear mechanism, ensure the stability of its movement, and reduce noise. The arranged C-shaped ridge structure can prevent the secondary gear mechanism from being excessively offset during packaging and automatic line production, thereby causing damage to the overall equipment and the production of defective products. It has the advantages of small overall size, low noise, strong applicability, low cost, high EMC performance, etc., and is easy to produce, and can realize full-process automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional diagram of the DC motor dimming actuator of the present invention;

[0017] Figure 2 It is a schematic diagram of the internal structure of the DC motor dimming actuator in the present invention;

[0018] Figure 3 is a three-dimensional diagram of the two-stage gear mechanism in the present invention;

[0019] Figure 4 is a three-dimensional diagram of the main gear mechanism in the present invention;

[0020] Figure 5 is a three-dimensional diagram of the screw mechanism in the present invention;

[0021] Figure 6 is a three-dimensional diagram of the main body shell in the present invention;

[0022] Figure 7 It is a schematic diagram of the assembly of the main body housing and the motor in the present invention;

[0023] Figure 8 is a transverse cross-sectional view of the DC motor dimming actuator of the present invention;

[0024] Fig. 9 An exploded schematic diagram of the DC motor dimming actuator in the present invention.

[0025] In the figure: 1. body shell; 101. first mounting hole; 102. second mounting hole; 103. annular slot; 104. insert; 2. screw mechanism; 201. rod-shaped body; 202. ball head; 203. external thread structure; 204. claw; 3. main gear mechanism; 301. columnar body; 302. first straight tooth structure; 303. internal thread structure; 4. secondary gear mechanism; 401. first rod-shaped connecting part; 402. second rod-shaped connecting part; 403. helical gear mechanism; 404. second straight tooth structure; 5. worm; 6. positioning shaft; 7. grounding spring; 8. back cover; 9. C-shaped ridge structure; 10. motor pin; 11. motor; 12. potentiometer; 121. potentiometer lever. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Figure 1 is a three-dimensional diagram of the DC motor dimming actuator of the present invention; Figure 2 It is a schematic diagram of the internal structure of the DC motor dimming actuator in the present invention; Figure 3 is a three-dimensional diagram of the two-stage gear mechanism in the present invention; Figure 4 is a three-dimensional diagram of the main gear mechanism in the present invention; Figure 5is a three-dimensional diagram of the screw mechanism in the present invention; Figure 6 is a three-dimensional diagram of the main body shell in the present invention; Figure 7 It is a schematic diagram of the assembly of the main body housing and the motor in the present invention; Figure 8 is a transverse cross-sectional view of the DC motor dimming actuator of the present invention; Fig. 9 Explosion diagram of the DC motor dimming actuator in the present invention. Figures 1 to 9 As shown, a preferred embodiment is shown, which shows a DC motor dimming actuator, including a motor 11 and a potentiometer 12, and also includes a body shell 1, a screw mechanism 2, a main gear mechanism 3, a secondary gear mechanism 4, a worm 5, a positioning shaft 6, a grounding spring 7, a back cover 8 and a C-shaped ridge structure 9, wherein a back cover 8 is provided on one side of the body shell 1, and a first mounting hole 101 and a second mounting hole 102 are sequentially provided in the body shell 1 from one side to the other side, wherein the screw mechanism 2 is provided in the first mounting hole 101 and the second mounting hole 102, the main gear mechanism 3 is sleeved on the outside of the screw mechanism 2, and the main gear mechanism 3 is threadedly connected to the screw mechanism 2, and the motor 11 is provided In the first mounting hole 101, a worm 5 is provided on the motor shaft at one end of the motor 11, a secondary gear mechanism 4 is provided on one side of the worm 5, the worm 5 is transmission-connected to the diode gear mechanism 4, the secondary gear mechanism 4 is transmission-connected to the main gear mechanism 3, a potentiometer 12 is provided on one side of the motor 11, a grounding spring 7 is provided on the potentiometer 12, and one side of the grounding spring 7 is connected to the motor 11, the other side of the grounding spring 7 is connected to the inner wall of the main body shell 1, one end of the positioning shaft 6 is connected to the back cover 8, the other end of the positioning shaft 6 extends to the inside of the secondary gear mechanism 4, a C-shaped ridge structure 9 is sleeved on the outside of the secondary gear mechanism 4, and the C-shaped ridge structure 9 is connected to the inner wall of the main body shell 1. In this embodiment, the positioning shaft 6 is used to fix the secondary gear mechanism 4 in the main body shell 1, and the positioning shaft 6 is connected to the back cover 8, so that the back cover 8, the secondary gear mechanism 4, and the main body shell 1 ensure a straight line, which greatly enhances the stability of the transmission mechanism. Figure 8As shown, the first mounting hole 101 is connected with the second mounting hole 102, wherein the second mounting hole 102 is used to install the ball head 202 in the screw mechanism 2, and the first mounting hole 101 is used to install the motor 11, the potentiometer 12, the main gear mechanism 3, the secondary gear mechanism 4, the worm 5, the positioning shaft 6, the grounding spring 7, the C-shaped ridge structure 9, etc., wherein the first mounting hole 101 is stepped. In this embodiment, the worm 5 is detachably connected to the motor shaft of the motor 11, and the worm 5 is provided with a spiral lifting mechanism for driving the secondary gear mechanism 4 to rotate, and the motor 11 adopts a DC motor. When the motor 11 drives the worm 5 to rotate, the spiral lifting mechanism on the worm 5 rotates and drives the secondary gear mechanism 4 to rotate, the secondary gear mechanism 4 drives the main gear mechanism 3 to rotate, and the main gear mechanism 3 drives the screw mechanism 2 to rotate, so that the screw mechanism 2 undergoes telescopic movement, so that the ball head 202 drives the reflector to move to adjust the horizontal position of the light. In this embodiment, the grounding spring 7 is used for grounding, and the C-shaped ridge structure 9 is used for fixing the secondary gear mechanism 4 to prevent the secondary gear mechanism 4 from tipping over and causing product defects.

[0030] Further, as a preferred embodiment, the screw mechanism 2 includes a rod-shaped body 201, a ball head 202 provided at one end of the rod-shaped body 201, and an external thread structure 203 provided at the outer edge of the other end of the rod-shaped body 201, wherein the ball head 202 is located in the second mounting hole 102, and the external thread structure 203 is provided in the first mounting hole 101. In this embodiment, during use, the ball head 202 can extend out of the second mounting hole 102.

[0031] Further, as a preferred embodiment, the main gear mechanism 3 includes a columnar body 301 with an opening at one end and a first spur tooth structure 302 provided on the outer edge of one end of the columnar body 301, and an internal thread structure 303 is provided on the inner peripheral wall of the columnar body 301, and the internal thread structure 303 matches the external thread structure 203. In this embodiment, the main gear mechanism 3 and the screw mechanism 2 are connected through the external thread structure 203 and the internal thread structure 303.

[0032] Further, as a preferred embodiment, the two-stage gear mechanism 4 includes a first rod-shaped connecting part 401 and a second rod-shaped connecting part 402 connected to one end of the first rod-shaped connecting part 401, wherein the outer edge of the other end of the first rod-shaped connecting part 401 is provided with a helical gear mechanism 403, the helical gear mechanism 403 is transmission-connected with the worm 5, and the outer edge of the second rod-shaped connecting part 402 is provided with a second straight tooth structure 404, and the second straight tooth structure 404 is meshed with the first straight tooth structure 302. The positioning shaft 6 is inserted into the axis of the first rod-shaped connecting part 401 and the second rod-shaped connecting part 402, and is limited at the upper and lower inner walls of the main body shell 1. At the same time, the axis position of the two-stage gear mechanism 4 is fixed to ensure that the two-stage gear structure 4 is not eccentric during rotation, and is located on the same axis as the upper and lower inner walls of the main body shell 1, thereby ensuring the stability of the two-stage gear mechanism 4 and reducing noise.

[0033] Further, as a preferred embodiment, the other end of the positioning shaft 6 passes through the first rod-shaped connecting portion 401 and the second rod-shaped connecting portion 402 .

[0034] Furthermore, as a preferred implementation, the DC motor dimming actuator further includes a motor pin 10 , a plurality of motor pins 10 are provided on one side of the motor 11 , and the motor 11 is connected to the potentiometer 12 via the plurality of motor pins 10 .

[0035] Further, as a preferred embodiment, the DC motor dimming actuator further includes an insert 104, two annular grooves 103 are provided at both ends of one side of the main housing 1, the two inserts 104 are provided in the two annular grooves 103, and one end of each insert 104 extends into the first mounting hole 101. In this embodiment, Figure 8 As shown, a gap is provided between one end of each insert 104 and the outer edge of one end of the main gear mechanism 3 , which is used to limit the main gear mechanism 3 without affecting the rotation of the main gear mechanism 3 and can provide a great supporting capacity for the ball head 202 .

[0036] Further, as a preferred embodiment, a metal coating is provided on the inner wall of the main body housing 1, and the metal coating is against the housing of the motor 11. In this embodiment, the grounding spring 7 is used for grounding, and the metal coating is connected to the housing of the motor 11 and is grounded through the grounding spring 7 on the potentiometer 12, thereby playing a shielding effect and completely shielding the internal electronic interference.

[0037] The above descriptions are merely preferred embodiments of the present invention, and are not intended to limit the protection scope and implementation methods of the present invention.

[0038] Based on the above embodiments, the present invention also has the following implementation modes:

[0039] Furthermore, as another embodiment, the screw mechanism 2 also includes a claw 204, which is arranged at the other end of the rod-shaped body 201, and the potentiometer 12 is also provided with a potentiometer lever 121, wherein the claw 204 is connected to the potentiometer lever 121, and when the screw mechanism 2 has an extension and contraction reaction, the claw 204 drives the potentiometer lever 121 to push the potentiometer 12, and different signal voltages are generated according to the different resistance values ​​of the potentiometer 12, and whether the height position of the specified ball head 202 is reached is calculated according to the ratio of the signal voltage to the working voltage.

[0040] Furthermore, as another embodiment, a limit rod is also provided on the rear cover 8 to prevent the secondary gear mechanism 4 from moving up and down, effectively preventing the noise caused by excessive movement of the secondary gear mechanism 4, while also ensuring the stability of the engagement between the secondary gear mechanism 4 and the main gear mechanism 3.

[0041] Further, as another embodiment, the DC motor dimming actuator further includes a motor buckle, which is used to fix the motor 11 in the first mounting hole 101. The motor buckle in this embodiment is elastic, and when the motor buckle is pressed with the motor 11, it will produce elastic deviation to both sides, and rebound after being pressed in. By setting the motor buckle, the axis of the motor 11 can be accurately positioned and the transmission can be stable, effectively reducing the high defective rate of noise, idling, and jamming, and is easy to control.

[0042] Further, as another embodiment, the C-shaped ridge structure 9 is an annular structure with an opening on one side, the C-shaped ridge structure 9 is wrapped around the outer edge of the helical gear mechanism 403, and the helical gear mechanism 403 is partially exposed outside the C-shaped ridge structure 9, and the exposed portion of the helical gear mechanism 403 is used for transmission connection with the worm 5. In other preferred embodiments, a shoulder is provided at the connection between the second rod-shaped connecting portion 402 and the first rod-shaped connecting portion 401, and the C-shaped ridge structure 9 can be wrapped around the shoulder.

[0043] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A DC motor dimming actuator, comprising a motor and a potentiometer, characterized in that: It also includes a main body shell, a screw mechanism, a main gear mechanism, a secondary gear mechanism, a worm, a positioning shaft, a grounding spring, a back cover and a C-shaped ridge structure, wherein the back cover is provided on one side of the main body shell, and a first mounting hole and a second mounting hole are sequentially provided in the main body shell from one side to the other side, wherein the screw mechanism is provided in the first mounting hole and the second mounting hole, the main gear mechanism is sleeved on the outside of the screw mechanism, and the main gear mechanism is threadedly connected to the screw mechanism, the motor is provided in the first mounting hole, the motor shaft at one end of the motor is provided with the worm, and one end of the worm The secondary gear mechanism is provided on the side of the motor, the worm is transmission-connected with the secondary gear mechanism, the secondary gear mechanism is transmission-connected with the main gear mechanism, the potentiometer is provided on one side of the motor, the grounding spring is provided on the potentiometer, and one side of the grounding spring is connected with the motor, the other side of the grounding spring is connected with the inner wall of the main body shell, one end of the positioning shaft is connected with the back cover, and the other end of the positioning shaft extends to the inside of the secondary gear mechanism, the C-shaped ridge structure is sleeved on the outside of the secondary gear mechanism, and the C-shaped ridge structure is connected with the inner wall of the main body shell; The screw mechanism comprises a rod-shaped body, a ball head provided at one end of the rod-shaped body, and an external thread structure provided at the outer edge of the other end of the rod-shaped body, wherein the ball head is located in the second mounting hole, and the external thread structure is provided in the first mounting hole; The main gear mechanism comprises a columnar body with an open end and a first straight tooth structure provided on the outer edge of one end of the columnar body, an inner circumferential wall of the columnar body is provided with an internal thread structure, and the internal thread structure matches the external thread structure; The two-stage gear mechanism comprises a first rod-shaped connecting part and a second rod-shaped connecting part connected to one end of the first rod-shaped connecting part, wherein the outer edge of the other end of the first rod-shaped connecting part is provided with a helical gear mechanism, the helical gear mechanism is connected to the worm gear transmission, and the outer edge of the second rod-shaped connecting part is provided with a second spur gear structure, the second spur gear structure is meshed with the first spur gear structure; The other end of the positioning shaft passes through the first rod-shaped connecting portion and the second rod-shaped connecting portion; It also includes motor pins, a plurality of motor pins are provided on one side of the motor, and the motor is connected to the potentiometer through the plurality of motor pins; It also includes an insert sheet, two annular grooves are provided at two ends of one side of the main body shell, two insert sheets are arranged in the two annular grooves, and one end of each insert sheet extends into the first mounting hole respectively; A metal coating is provided on the inner wall of the main body shell, and the metal coating abuts against the shell of the motor.

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