CN215580751U - Speed reducer for lighting equipment - Google Patents

Abstract

The application relates to a speed reducer for lighting equipment, which comprises a bottom cover arranged on a motor, wherein a secondary driven gear assembly, a driven gear assembly driving the secondary driven gear assembly to rotate and a driving gear assembly driving the driven gear assembly to rotate are rotatably arranged on the bottom cover; the driving gear assembly is connected with a rotor of the motor; the transmission ratio of the driving gear assembly to the driven gear assembly and the transmission ratio of the driven gear assembly to the secondary driven gear assembly are not more than 1; the transmission ratio of at least one of the two groups of the driving gear assembly and the driven gear assembly and the secondary driven gear assembly is less than 1; the secondary gear assembly is provided with an induction assembly for recording the final rotating angle of the secondary gear assembly; the final rotation angle of the secondary moving gear assembly is less than 360 degrees; and the top cover and the bottom cover are mutually covered and fixed through a fixing piece. The method and the device have the effect of reducing the possibility of resetting the equipment and improving the working efficiency.

Description

Speed reducer for lighting equipment

Technical Field

The application relates to the technical field of speed reducers, in particular to a speed reducer for lighting equipment.

Background

Currently, in many standard lighting devices with controlled motion, such as horizontal (PAN), vertical (TILT), or both, a horizontal vertical motion system (PAN/TILT, also known as X/Y motion) is used to control the attitude of the lighting device. The horizontal vertical motion system (PAN/TILT, also known as X/Y motion) also provides the ability to automatically reposition the device if it is not in a good orientation.

As shown in fig. 1, a related horizontal and vertical motion system includes a first motor and a second motor, which are perpendicular to each other and installed in the horizontal and vertical directions, respectively; the motor shafts of the first motor and the second motor are respectively provided with a coding disc and a driving wheel, and the coding discs of the first motor and the second motor are respectively provided with a coder for reading the rotation angle position of the lighting equipment; the action wheel of first motor passes through the conveyer belt and is connected from the driving wheel with the first of installing in the first pivot of lighting apparatus support, and the action wheel of second motor passes through the conveyer belt and is connected from the driving wheel with the second of installing in lighting apparatus support second pivot, and first follow driving wheel, second all are equipped with first magnet from the driving wheel, and first magnet is connected with the magnet sensor that is used for setting up the default position of machinery.

In view of the above-mentioned related art, the inventors consider that there are drawbacks: when the lighting equipment is in failure or power failure, the motor can rotate for many times in order to obtain a large-angle position because the angle position is read by the encoder on the encoding disc; by rotating several times, it is difficult for the system to know how many times the motor has rotated after a power outage or how many steps the system has skipped. Therefore, to operate this system, the lighting device needs to reset the device, which however takes a long time and the light needs to be turned off when resetting the device.

Disclosure of Invention

To reduce the possibility of resetting the device and thereby increase the efficiency of operation, the present application provides a decelerator for a lighting device.

The application provides a reduction gear for lighting apparatus, adopts following technical scheme:

a speed reducer for lighting equipment comprises a bottom cover arranged on a motor, wherein a secondary driven gear assembly, a driven gear assembly driving the secondary driven gear assembly to rotate and a driving gear assembly driving the driven gear assembly to rotate are rotatably arranged on the bottom cover;

the driving gear assembly is connected with a rotor of the motor; the transmission ratio of the driving gear assembly to the driven gear assembly and the transmission ratio of the driven gear assembly to the secondary driven gear assembly are not more than 1; the transmission ratio of at least one of the two groups of the driving gear assembly and the driven gear assembly and the secondary driven gear assembly is less than 1;

the secondary gear assembly is provided with an induction assembly for recording the final rotating angle of the secondary gear assembly; the final rotation angle of the secondary moving gear assembly is less than 360 degrees;

and the top cover and the bottom cover are mutually covered and fixed through a fixing piece.

Through adopting above-mentioned technical scheme, rotate respectively with driving gear subassembly, driven gear subassembly and time driven gear subassembly and install in the bottom, the bottom covers each other with the top cap and closes to pass through the mounting fixed. Then the motor is driven, a rotor of the motor drives the driving gear assembly to rotate, the driving gear assembly drives the driven gear assembly, the driven gear assembly drives the secondary driven gear assembly, the transmission ratio of the driving gear assembly to the driven gear assembly and the transmission ratio of the driven gear assembly to the secondary driven gear assembly are not more than 1, and the transmission ratio of at least one group is less than 1; so the final rotation angle of inferior driven gear subassembly reduces, and finally, the final rotation angle of inferior driven gear subassembly will read through the response subassembly, and final rotation angle is less than 360 and makes this device can effectively reduce final rotation angle, and then reaches the possibility that reduces the motor rotor revolution of paying attention to and remove reset equipment to and reach the effect that promotes work efficiency.

Optionally, the drive gear assembly comprises a drive gear; the driving gear is rotatably installed at the center of the bottom cover and connected with the motor rotor through a connecting part, and the driving gear is meshed with the driven gear assembly.

Through adopting above-mentioned technical scheme, set up the driving gear in the central point of bottom and put, can increase predetermined space for be convenient for install driven gear subassembly, inferior driven gear subassembly, then through adapting unit, be connected driving gear and electric motor rotor, and then reach and make the driving gear drive driven gear subassembly pivoted effect.

Optionally, the connecting part comprises a connecting shaft and a coupler arranged at the bottom of the bottom cover, the connecting shaft is movably arranged in a penetrating manner at the center of the bottom cover and fixedly connected with the driving gear, a limiting piece used for limiting the driving gear to be separated from the connecting shaft is detachably mounted on the connecting shaft, and one end of the coupler and one end of the connecting shaft, which deviates from the driving gear, of the driving gear are fixedly connected, and the other end of the coupler is coupled with the motor rotor.

Through adopting above-mentioned technical scheme, when electric motor rotor rotated, will drive the driving gear through the shaft coupling and rotate, and then reach the driving gear and drive driven gear subassembly pivoted effect.

Optionally, the driven gear assembly includes a first driven gear a and a first driven gear b, the diameters of the first driven gear a and the first driven gear b are different, the first driven gear b and the first driven gear a share a central axis and are fixedly connected to each other, the first driven gear a is in meshed connection with the driving gear, the first driven gear b is in meshed connection with the secondary driven gear assembly, and the transmission ratio is smaller than 1.

Through adopting above-mentioned technical scheme, when motor rotor rotated for the driving gear drives first driven gear an and rotates, then first driven gear b and first driven gear a synchronous revolution further drive inferior driven gear subassembly, because first driven gear b is less than 1 with inferior driven gear subassembly's transmission ratio, and then make the rotation angle between first driven gear b and the inferior driven gear subassembly reduce predetermined number of degrees.

Optionally, the secondary driven gear assembly comprises a second driven gear member, a third driven gear member, and a fourth driven gear member; the first driven gear b is in meshed connection with a second driven gear part, the second driven gear part is in meshed connection with a third driven gear part, the transmission ratio is not more than 1, and the third driven gear part is in meshed connection with a fourth driven gear part, and the transmission ratio is not more than 1.

By adopting the technical scheme, the first driven gear b drives the second driven gear part to rotate, so that the second driven gear part drives the third driven gear part to rotate, the third driven gear part drives the fourth driven gear part, and the final rotation angle of the fourth driven gear part is reduced.

Optionally, the second driven gear part includes a second driven gear a and a second driven gear b with different diameters, the second driven gear a and the second driven gear b share a central shaft and are fixedly connected, and the first driven gear b and the second driven gear b are in meshed connection and have a transmission ratio not greater than 1.

Through adopting above-mentioned technical scheme, when motor rotor rotated for the driving gear drives first driven gear a and rotates, then first driven gear b and first driven gear a synchronous revolution, further first driven gear b drives second driven gear b and rotates, and first driven gear b is not more than 1 with second driven gear b's transmission ratio, and then reaches the effect that makes the final rotation angle of fourth driven gear part reduce.

Optionally, the fourth driven gear part includes a fourth driven gear rotatably mounted on the bottom cover, the fourth driven gear is in meshed connection with the third driven gear part, the sensing assembly includes a magnet encoder and a second magnet disposed on the axis of the fourth driven gear, and the magnet encoder is disposed directly above the second magnet and connected to the second magnet.

Through adopting above-mentioned technical scheme, the second magnet sets up in fourth driven gear axle center, will be along with fourth driven gear synchronous revolution, and the magnet encoder is connected with the second magnet, and then reaches the effect of the final rotation angle of record fourth driven gear.

Optionally, the magnetic encoder includes a PCB sensor with a lead interface, a through hole adapted to the interface is formed in a side wall of the bottom cover, and the interface of the PCB sensor corresponds to and is communicated with the through hole.

Through adopting above-mentioned technical scheme, the setting of through-hole, the interface of the PCB sensor of being convenient for can be connected with subsequent motor drive, and then reaches the effect that can be convenient for take notes the final rotation angle of fourth driven gear.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the driving gear assembly, the driven gear assembly and the secondary driven gear assembly are respectively rotatably mounted on the bottom cover, and the bottom cover and the top cover are mutually covered and fixed through the fixing piece. Then the motor is driven, a rotor of the motor drives the driving gear assembly to rotate, so that the driven gear assembly and the secondary driven gear assembly sequentially rotate, and then the transmission ratio of the driving gear assembly to the driven gear assembly and the transmission ratio of the driven gear assembly to the secondary driven gear assembly are not more than 1, and the transmission ratio of at least one group is less than 1; therefore, the final rotating angle of the secondary driven gear assembly is reduced, and finally, the final rotating angle of the secondary driven gear assembly is read through the sensing assembly, so that the possibility of paying attention to the revolution of the motor rotor to reset equipment is reduced, and the effect of improving the working efficiency is achieved;

2. the second magnet is arranged on the axis of the fourth driven gear, and along with the synchronous rotation of the fourth driven gear, the magnet encoder is connected with the second magnet, so that the effect of recording the final rotation angle of the fourth driven gear is achieved.

Drawings

Fig. 1 is a schematic structural diagram of a conventional lighting device in a horizontal and vertical motion system.

Fig. 2 is an overall schematic view of the structure of the present application in which the lighting device is installed.

Fig. 3 is a schematic view of the overall structure of the present application.

Fig. 4 is another overall structural schematic diagram of the present application.

Fig. 5 is an exploded view of the structure of the present application.

FIG. 6 is a schematic representation of the gear ratios of the interconnected gears of the embodiment of the present application.

Fig. 7 is a schematic structural view of a top cover of the present application.

Description of reference numerals: 100. a first motor; 101. a code disc; 102. a driving wheel; 103. a support; 104. A first rotating shaft; 105. a first driven wheel; 106. a second motor; 107. a conveyor belt; 108. a second rotating shaft; 109. a second driven wheel; 110. an encoder; 120. a first magnet; 130. a magnet sensor; 1. a bottom cover; 11. a drive gear assembly; 111. a driving gear; 112. a connecting shaft; 113. a coupling; 114. a shaft sleeve; 115. a through hole; 12. a driven gear assembly; 121. a first driven gear a; 122. a first driven gear b; 123. a first vertical shaft; 13. an inductive component; 131. a magnet encoder; 132. a second magnet; 14. A secondary driven gear assembly; 141. a second driven gear a; 142. a second driven gear b; 143. a second vertical shaft; 144. a third driven gear; 145. a third vertical shaft; 146. a fourth driven gear; 147. a fourth vertical shaft; 148. a receiving groove; 2. a top cover; 21. a limiting column; 211. and (4) a slot.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

Referring to fig. 1, a related horizontal-vertical motion system includes a first motor 100 and a second motor 106 that are perpendicular to each other and installed in a horizontal direction and a vertical direction, respectively; the motor shafts of the first motor 100 and the second motor 106 are respectively provided with an encoding disc 101 and a driving wheel 102.

The encoding disks 101 of the first motor 100 and the second motor 106 are respectively provided with an encoder 110 for reading the rotation angle position of the lighting equipment; the driving wheel 102 of the first motor 100 is connected with a first driven wheel 105 arranged on a first rotating shaft 104 of the lighting device bracket 103 through a conveying belt 107, the driving wheel 102 of the second motor 106 is connected with a second driven wheel 109 arranged on a second rotating shaft 108 of the lighting device bracket 103 through the conveying belt 107, the first driven wheel 105 and the second driven wheel 109 are both provided with a first magnet 120, and the first magnet 120 is connected with a magnet sensor 130 for indicating a mechanical default position.

The embodiment of the application discloses a speed reducer for lighting equipment.

Referring to fig. 2 and 3, a reducer may be mounted at a rear portion of the first motor 100, the second motor 106, or both of them, in this embodiment, the reducers are mounted at rear portions of the first motor 100 and the second motor 106, and the first motor 100 and the second motor 106 have the same structure, so that they are hereinafter collectively referred to as motors.

Referring to fig. 4 and 5, the decelerator of the present application includes a bottom cover 1, a top cover 2, a driving gear assembly 11, a driven gear assembly 12, a secondary driven gear assembly 14, and an induction assembly 13.

All rotate drive gear assembly 11, driven gear assembly 12 and inferior driven gear assembly 14 and install in bottom 1, wherein, drive gear assembly 11 is connected with the rotor of motor, and drive gear assembly 11 drives driven gear assembly 12 and rotates, and driven gear assembly 12 drives inferior driven gear assembly 14 and rotates.

Moreover, the transmission ratio of the driving gear assembly 11 to the driven gear assembly 12 and the transmission ratio of the driven gear assembly 12 to the secondary driven gear assembly 14 are not more than 1; the drive ratio of at least one set of the two sets of drive gear assembly 11 and driven gear assembly 12, driven gear assembly 12 and inferior driven gear assembly 14 is less than 1, make inferior driven gear assembly 14 final rotation angle reduce, inferior driven gear assembly's final rotation angle is less than 360, will take notes inferior driven gear assembly final rotation angle simultaneously through response subassembly 13, make and reduce the possibility of resetting equipment under the revolution condition of not paying attention to electric motor rotor, and then reach the effect that promotes work efficiency.

Specifically, the driving gear assembly 11 includes a driving gear 111, and the driving gear 111 is rotatably installed at a central position of the bottom cover 1 and is connected to the motor rotor through a connecting member.

Referring to fig. 3 and 5, the connecting member includes a connecting shaft 112 and a coupling 113; wherein, the connecting shaft 112 is movably inserted in the center of the bottom cover 1 and is fixedly connected to the center of the driving gear 111, one end of the connecting shaft 112 is provided with a limiting piece, and the other end is fixedly connected to the coupling 113. In the embodiment, the limiting member is used to limit the driving gear 111 to be separated from the connecting shaft 112, the limiting member may be a copper sleeve 114, and the connecting shaft 112 penetrates through the center of the driving gear 111 and protrudes upward and is inserted into the sleeve 114. In addition, the coupling 113 is disposed right below the bottom cover 1 and movably coupled to the motor rotor through a rear cover disposed on the motor.

The driven gear assembly 12 includes a first driven gear a121 and a first driven gear b122, the first driven gear a121 and the first driven gear b122 share a central axis and are fixedly connected to each other, a first vertical shaft 123 protruding toward the top cover 2 is fixed on the bottom cover 1, and the axes of the first driven gear a121 and the first driven gear b122 are rotatably sleeved on the first vertical shaft 123.

In the present embodiment, the first driven gear a121 is disposed on the top of the first driven gear b122, and the first driven gear a121 is engaged with the driving gear 111. The motor rotates to make the driving gear 111 rotate synchronously, the driving gear 111 drives the first driven gear a121, and in order to reduce the rotation angle of the first driven gear a121 to a predetermined value, the transmission ratio of the driving gear 111 and the first driven gear a121 can be smaller than 1, so that the diameters of the driving gear 111 and the first driven gear a121 are designed according to the transmission ratio of the driving gear 111 and the first driven gear a 121.

Referring to fig. 5 and 6, in the present embodiment, the transmission ratio of the driving gear 111 to the first driven gear a121 may be 1: 3; similarly, the first driven gear a121 and the first driven gear b122 may be designed to be gears with different diameters, the diameter of the first driven gear b122 is set to be smaller than that of the first driven gear a121, the driving gear 111 drives the first driven gear a121 to rotate, and the first driven gear b122 rotates synchronously with the first driven gear a121, so that the rotation angle of the first driven gear b122 is reduced by 3 °.

The secondary driven assembly may include a second driven gear member, a third driven gear member, and a fourth driven gear member. The first driven gear b122 is in meshed connection with a second driven gear part, the second driven gear part is in meshed connection with a third driven gear part, the transmission ratio is not more than 1, and the third driven gear part is in meshed connection with a fourth driven gear part, and the transmission ratio is not more than 1.

Specifically, the second driven gear part includes a second driven gear a141 and a second driven gear b142, the second driven gear a141 and the second driven gear b142 share a central axis and are fixedly connected to each other, the bottom cover 1 is fixed with a second vertical shaft 143 protruding toward the top cover 2, and the axes of the second driven gear a141 and the second driven gear b142 are rotatably sleeved on the second vertical shaft 143. In order to further reduce the rotation angle of the second driven gear part, in the embodiment, the first driven gear b122 and the second driven gear b142 may be in meshed connection, and the transmission ratio is less than 1, and the transmission ratio of the first driven gear b122 to the second driven gear b142 may be 1:1.4, so that the rotation angle between the first driven gear part and the second driven gear part is reduced by 1.4 °.

Meanwhile, the diameter of the second driven gear b142 is designed to be larger than the diameter of the second driven gear a141, further reducing the rotation angle of the second driven gear a 141. In this embodiment, the third driven gear part may include a third driven gear 144, the bottom cover 1 is fixed with a third vertical shaft 145 protruding toward the top cover 2, and an axis of the third driven gear 144 is rotatably sleeved on the third vertical shaft 145. In addition, the second driven gear a141 and the third driven gear 144 are in meshed connection, and the transmission ratio of the two is less than 1, the transmission ratio of the second driven gear a141 and the third driven gear 144 can be 1:3, so that the rotation angle between the second driven gear part and the third driven gear part is reduced by 3 °.

The fourth driven gear part comprises a fourth driven gear 146, a fourth vertical shaft 147 protruding towards the top cover 2 is fixed on the bottom cover 1, the axis of the fourth driven gear 146 is rotatably sleeved on the fourth vertical shaft 147, meanwhile, the third driven gear 144 is in meshed connection with the fourth driven gear 146, and the transmission ratio of the third driven gear 144 to the fourth driven gear 146 is not less than 1. In the present embodiment, the gear ratio of the third driven gear 144 to the fourth driven gear 146 may be 1:1, so the third driven gear 144 and the fourth driven gear 146 are provided as gears having the same diameter, and thus the rotation angle between the third driven gear 144 and the fourth driven gear 146 is not reduced. In this embodiment, the final angle of rotation between the main gear to the fourth driven gear 146 is reduced by 12.6 °, which means that the fourth driven gear 146 will rotate 360 when the rotor of the motor rotates 12.6 times.

Referring to fig. 2 and 5, in the present embodiment, it can be considered that the existing lighting device can rotate 550 ° in the horizontal movement, the existing lighting device can rotate 240 ° in the vertical movement, and the number of teeth of the driven wheel can be 6 times that of the driving wheel 102 of the first motor 100, and the actual final rotation angle of the fourth driven gear 146 can be obtained by analyzing the horizontal movement as an example. The correlation calculation (550 × 6) ÷ 360 ═ 9.2 times. This means that the motor rotor needs to be turned nearly 9.2 times to reach a rotation angle of 550 °; when the reduction gear box of the present application is disposed at the rear of the motor, the final rotation angle of the fourth driven gear 146 is (550 × 6) ÷ 12.6 ═ 262 °, so the final rotation angle of the fourth driven gear 146 should be less than 360 °.

Referring to fig. 4 and 5, the sensing assembly 13 includes a magnet encoder 131 with a lead interface and a second magnet 132, in this embodiment, the magnet encoder 131 may be a PCB encoder with a sensor; the axis of the fourth driven gear 146 is provided with a receiving groove 148, the second magnet 132 is fixedly arranged in the receiving groove 148, the second magnet 132 is arranged right above the fourth vertical shaft 147, and the PCB encoder is arranged above the second magnet 132 and is magnetically connected. When the fourth driven gear 146 rotates, the second magnet 132 rotates synchronously with the fourth driven gear 146; more than one thousand lines are printed inside the second magnet 132, and the PCB sensor reads the rotation angle of the second magnet 132 with 10-bit resolution, thereby achieving the effect of recording the final rotation angle of the fourth driven gear 146.

A through hole 115 which is matched and communicated with a lead interface of the PCB sensor is formed in the side wall of the bottom cover 1, so that the PCB sensor is connected with a motor driver (not shown in the figure) through a lead, and the lead interface of the PCB sensor is inserted into the through hole 115 of the bottom cover 1; the motor driver is connected with the motor through the motor wire, and then the effect of driving the motor to rotate conveniently is achieved.

Referring to fig. 5 and 7, the top cover 2 is adapted to the bottom cover 1, the top cover 2 and the bottom cover 1 are mutually covered and fixed by a fixing member, in this embodiment, the fixing member may be a cross countersunk head screw, four cross countersunk head screws are provided, and then the cross countersunk head screws penetrate through the top cover 2 and the bottom cover 1 at positions close to the edges by using matrix arrangement threads. In addition, in order to enhance the stability of the rotation of the main gear to the fourth driven gear 146, the inner wall of the top cover 2 facing the bottom cover 1 is provided with a stopper post 21 corresponding to the connecting shaft 112, the first vertical shaft 123, the second vertical shaft 143, and the third vertical shaft 145, respectively.

The limiting column 21 protrudes towards one side of the bottom cover 1 and is provided with a slot 211 extending along the protruding length direction, the notch of the slot 211 corresponding to the connecting shaft 112 is matched with the diameter of the shaft sleeve 114, and the shaft sleeve 114 is inserted into the slot 211 corresponding to the connecting shaft 112 and is fixed at the bottom of the slot 211; the slots 211 of the other limiting columns 21 are matched with the corresponding first vertical shaft 123, second vertical shaft 143 and third vertical shaft 145, and the first vertical shaft 123, second vertical shaft 143 and third vertical shaft 145 are respectively inserted into the respective slots 211.

The implementation principle of the speed reducer for the lighting equipment is as follows: when the motor rotor rotates, the driving gear 111 moves synchronously, the driving gear 111 drives the first driven gear a121, and the first driven gear b122 rotates synchronously along with the first driven gear a 121;

then the first driven gear b122 drives the second driven gear b142 to rotate, and the second driven gear a141 and the second driven gear b142 rotate synchronously; then, the second driven gear a141 drives the third driven gear 144 to rotate, the third driven gear 144 drives the fourth driven gear 146 to rotate, the second magnet 132 rotates synchronously with the fourth driven gear 146, and finally the PCB sensor reads the rotation angle of the second magnet 132, thereby achieving the effect of recording the final rotation angle of the fourth driven gear 146.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A decelerator for lighting equipment, including

The bottom cover (1) is arranged on a motor, and the bottom cover (1) is rotatably provided with a secondary driven gear assembly (14), a driven gear assembly (12) for driving the secondary driven gear assembly (14) to rotate and a driving gear assembly (11) for driving the driven gear assembly (12) to rotate;

the driving gear assembly (11) is connected with a rotor of the motor; the transmission ratio between the driving gear assembly (11) and the driven gear assembly (12) and the transmission ratio between the driven gear assembly (12) and the secondary driven gear assembly (14) are not more than 1; the transmission ratio of at least one of the two groups of the driving gear assembly (11) and the driven gear assembly (12) and the secondary driven gear assembly (14) is less than 1;

the secondary driven gear assembly (14) is provided with a sensing assembly (13) for recording the final rotating angle of the secondary driven gear assembly (14); the final rotation angle of the secondary driven gear assembly (14) is less than 360 °;

and the top cover is matched with the bottom cover (1), and the top cover and the bottom cover (1) are mutually covered and fixed through a fixing piece.

2. A decelerator for a lighting device as claimed in claim 1, wherein: the driving gear assembly (11) comprises a driving gear (111); the driving gear (111) is rotatably installed at the center of the bottom cover (1) and connected with the motor rotor through a connecting part, and the driving gear (111) is meshed with the driven gear assembly (12) and connected with the motor rotor.

3. A decelerator for a lighting device as claimed in claim 2, wherein: the connecting part comprises a connecting shaft (112) and a coupler (113) arranged at the bottom of the bottom cover (1), the connecting shaft (112) is movably arranged in a penetrating mode at the center of the bottom cover (1) and fixedly connected with the driving gear (111), a limiting piece used for limiting the driving gear (111) to be separated from the connecting shaft (112) is detachably mounted on the connecting shaft (112), and one end of the coupler (113) and one end, deviating from the driving gear (111), of the connecting shaft (112) are fixedly connected, and the other end of the coupler is coupled with the motor rotor.

4. A decelerator for a lighting device as claimed in claim 2, wherein: the driven gear assembly (12) comprises a first driven gear a (121) and a first driven gear b (122) which are different in diameter, the first driven gear b (122) and the first driven gear a (121) share a central shaft and are fixedly connected with each other, the first driven gear a (121) is meshed with the driving gear (111), the first driven gear b (122) is meshed with the secondary driven gear assembly (14), and the transmission ratio is smaller than 1.

5. A decelerator for a lighting device as claimed in claim 4, wherein: the secondary driven gear assembly (14) includes a second driven gear member, a third driven gear member, and a fourth driven gear member; the first driven gear b (122) is in meshed connection with a second driven gear part, the second driven gear part is in meshed connection with a third driven gear part, the transmission ratio is not larger than 1, and the third driven gear (143) part is in meshed connection with a fourth driven gear part, and the transmission ratio is not larger than 1.

6. A decelerator for a lighting device as claimed in claim 5, wherein: the second driven gear part comprises a second driven gear a (141) and a second driven gear b (142) which are different in diameter, the second driven gear a (141) and the second driven gear b (142) share a central shaft and are fixedly connected, the first driven gear b (122) and the second driven gear b (142) are in meshed connection, and the transmission ratio is not more than 1.

7. A decelerator for a lighting device as claimed in claim 5, wherein: the fourth driven gear part comprises a fourth driven gear (146) rotatably mounted on the bottom cover (1), the fourth driven gear (146) is meshed with the third driven gear (144), the induction assembly (13) comprises a magnet encoder (131) and a second magnet (132) arranged on the axis of the fourth driven gear (146), and the magnet encoder (131) is arranged right above the second magnet (132) and connected with the second magnet (132).

8. A decelerator for a lighting device as claimed in claim 7, wherein: the magnetic encoder (131) comprises a PCB sensor with a lead interface, a through hole (115) matched with the interface is formed in the side wall of the bottom cover (1), and the interface of the PCB sensor corresponds to and is communicated with the through hole (115).

Images