CN114222060A - Output assembly, optical drive device and security equipment - Google Patents

Output assembly, optical drive device and security equipment Download PDF

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Publication number
CN114222060A
CN114222060A CN202111436611.7A CN202111436611A CN114222060A CN 114222060 A CN114222060 A CN 114222060A CN 202111436611 A CN202111436611 A CN 202111436611A CN 114222060 A CN114222060 A CN 114222060A
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China
Prior art keywords
output
gear
motor
shaft
bracket
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CN202111436611.7A
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Chinese (zh)
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CN114222060B (en
Inventor
黄成凯
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New Shicoh Motor Co Ltd
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New Shicoh Motor Co Ltd
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Priority to CN202111436611.7A priority Critical patent/CN114222060B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/695—Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

The invention discloses an output assembly of an optical driving device, which comprises an output shaft, a bracket, a fixed cover plate, an output gear, a concentricity constraint structure, an axial float limiting mechanism and a gear transmission mechanism. The bracket is fixed on one end surface of the stator of the motor; the supporting plate of the bracket is supported on one surface of the fixed cover plate close to the bracket; the axis of the output gear is superposed with the axis of the output shaft; the output gear is positioned between the bracket and the fixed cover plate; the concentricity constraint structure is arranged between the output end of the motor center shaft and the output gear, so that the axis line of the motor center shaft is coincided with the axis line of the output gear; the axial float limiting mechanism comprises a first axial limiting mechanism and a second axial limiting mechanism so as to prevent the output gear from axially floating; and the gear transmission mechanism is used for transmitting the power output by the middle shaft of the motor to the output gear of the output shaft so as to drive the output shaft to rotate. The invention has the advantages of high output concentricity, high radial strength of the output shaft and small shaft play after the machine is installed.

Description

Output assembly, optical drive device and security equipment
Technical Field
The invention belongs to the technical field of camera motors, and particularly relates to an output assembly of an optical driving device, the optical driving device and security equipment.
Background
The zoom action of the lens of the existing security monitoring camera is generally driven by a micro stepping motor. In use, the zooming action of the lens of the security monitoring camera needs to be accurate in place and must depend on accurate driving, and the accurate output of the output shaft output assembly of the micro stepping motor is one of the keys of accurate zooming.
Chinese patent CN2020217010035 discloses a new-type short stroke step motor, and its output shaft realizes the output to the output shaft through guide post and the activity slider that sets up on fixed mounting support, because above-mentioned structure exports through the mode to the output shaft location and leads to the whole concentricity of output assembly not good, and the output shaft is radially used intensity poor, and the axial float is big behind the installation, can't accomplish accurate output to influence accurate zooming.
Disclosure of Invention
The output assembly of the optical drive device of the invention adopts a structure that a bracket is matched with a gear transmission mechanism for output, and has the advantages of high output concentricity, high radial strength of an output shaft and small shaft play after installation.
In order to achieve the purpose, the invention adopts the following technical scheme: an output assembly of an optical drive apparatus, comprising an output shaft, the output assembly further comprising:
the bracket is fixed on one end surface of the stator of the motor;
the support plate of the bracket is supported on one surface of the fixed cover plate close to the bracket;
the output gear is connected to one end of the output shaft close to the middle shaft of the motor, and the shaft axis of the output gear is superposed with the shaft axis of the output shaft;
the output gear is positioned between the bracket and the fixed cover plate;
the concentricity constraint structure is arranged between the output end of the motor center shaft and the output gear, so that the axis line of the motor center shaft is coincided with the axis line of the output gear;
the axial float limiting mechanism comprises a first axial limiting mechanism and a second axial limiting mechanism, the first axial limiting mechanism is arranged between one end, close to the support, of the output gear and the support, and the second axial limiting mechanism is arranged between one end, close to the fixed cover plate, of the output gear and the fixed cover plate to prevent the output gear from axially floating;
and the gear transmission mechanism is used for transmitting the power output by the middle shaft of the motor to the output gear of the output shaft so as to drive the output shaft to rotate.
In the output assembly of the optical driving device, an avoiding through hole is formed in the center of the support and used for avoiding the motor center shaft penetrating through the avoiding through hole.
In the output assembly of the optical driving apparatus, the first axial limiting mechanism includes:
the first axial limiting convex ring is arranged on one end surface of the output gear close to the support and/or one end surface of the support close to the output gear.
In the output assembly of the optical driving apparatus, the second axial limiting mechanism includes:
the inner ring of the ball bearing is fixed on the output shaft, and the outer ring of the ball bearing is fixed on the bearing fixing part of the fixed cover plate;
and the second axial limiting convex ring is arranged at one end of the ball bearing close to the fixed cover plate and abuts against the lower end surface of the inner ring of the ball bearing.
Above-mentioned optical drive's output assembly, second axial stop gear still includes:
the wave pad is arranged between the outer end of the outer ring of the ball bearing and the bearing fixing part.
The output assembly of the optical driving device further comprises:
the fixed plate is fixed on one end face of the stator of the motor, and the support is fixed on one end face of the stator, far away from the motor, of the fixed plate.
In the output assembly of the optical driving device, the fixing plate is fixedly connected with the stator in the circumferential direction.
Above-mentioned optical drive device's output assembly, the support lower surface is provided with two at least fixed columns, is provided with two at least fixed orificess that correspond on the fixed plate, and the support passes through the fixed column to be fixed on the fixed plate.
In the output component of the optical driving device, the fixed cover plate is fixed on the opening of the shell of the motor.
The output assembly of the optical driving device, the gear transmission mechanism comprises:
the driving gear is sleeved at the output end of the motor middle shaft;
the two first-stage duplicate gears are symmetrically distributed by the axial lead of the output shaft;
the two primary duplicate gears are rotatably arranged between the fixed cover plate and the fixed plate, and one primary gear of the two primary duplicate gears is meshed with the driving gear;
two secondary duplicate gears are arranged and are symmetrically distributed by the axis line of the output shaft;
the two secondary duplicate gears are rotatably arranged between the fixed cover plate and the bracket, and the other primary gear of the two primary duplicate gears is meshed with one secondary gear of the two secondary duplicate gears;
the other secondary gear of the secondary duplicate gear is meshed with the output gear.
The output component of the optical driving device, wherein the concentricity constraint structure comprises:
the concentricity constraint hole is formed in the center of one end face, close to the support, of the output gear, the output end of the motor middle shaft extends into the concentricity constraint hole, and the concentricity constraint hole is in clearance fit with the output end of the motor middle shaft.
An optical drive device having an output module of the optical drive device;
the motor is a stepping motor and is connected with the output component of the optical driving device.
The security equipment is provided with the optical driving device.
Compared with the prior art, the invention has the advantages that:
the output assembly of the optical driving device is provided with the first axial limiting mechanism and the second axial limiting mechanism, so that the output shaft can be effectively prevented from axially moving, the output power is more stable, and the focusing accuracy of the optical driving device is greatly enhanced.
According to the output assembly of the optical driving device, the support structure is integrated in the gear transmission mechanism of the output assembly, and the support is provided with the avoiding position and is matched with the gear in the gear transmission mechanism. The driving gear is clamped by the two primary duplicate gears to transmit power, so that a motor center shaft where the driving gear is located is very stable in the radial position, and shaft movement is not easy to occur. And the output gear is clamped by the two secondary duplicate gears after output, and finally power is output, so that the structure of the output shaft is very stable, and radial shaft play is not easy to occur. Furthermore, the support avoids the motor center shaft, so that the motor center shaft is directly matched with the output shaft, and the assembly concentricity of the motor center shaft and the output shaft is good.
According to the output assembly of the optical driving device, the support structure is integrated in the gear transmission mechanism of the output assembly, and the support is provided with the support plate structures at two sides and used for supporting left and right, so that the fixing cover plate can limit the freedom degree of the support in the axial direction. Meanwhile, the bracket is also provided with a fixing column which is fixed on the fixing plate, so that the freedom degree of the bracket in the X/Y axis direction is realized. The structure enables the whole output assembly to be stable in structure and enhanced in strength.
The bracket in the output assembly of the optical driving device is made of the same material as the gear, so that the friction between the gear and the bracket is smaller when the gear rotates. And an avoiding step is arranged between the support and the output gear, so that the support cannot be interfered when the output shaft rotates. And some irrelevant parts are removed from the whole support, meanwhile, lightening slots are dug in unnecessary parts, and meanwhile, reinforcing ribs are arranged in the support, so that the support is light and firm as a whole.
Drawings
Fig. 1 is a schematic structural diagram of an output module and an interior of a motor of an optical driving apparatus provided in the present invention.
Fig. 2 is a schematic structural view of fig. 1 without a fixed cover plate.
Fig. 3 is a view showing a connection relationship between gears.
Fig. 4 is a schematic diagram of the exploded structure of fig. 2.
Fig. 5 is a schematic front view of the structure of fig. 1.
Fig. 6 is a sectional view a-a of fig. 5.
Fig. 6a is an enlarged view at B of fig. 6.
Fig. 7 is a schematic view of the stent structure of fig. 1.
Fig. 8 is an assembly relationship diagram between the carrier and the output gear, the output shaft and the fixed plate.
Fig. 9 is an enlarged view at a in fig. 8.
Fig. 10 is a diagram of the assembly relationship between the output shaft, the motor middle shaft, the driving gear and the electronic rotor.
Fig. 11 is a longitudinal sectional view in the axial direction of fig. 10.
Fig. 12 is a schematic view of the matching structure of two pairs of secondary duplicate gears and a bracket.
Fig. 13 is a schematic structural view of fig. 1 with the wire cassette disposed.
Fig. 14 is a schematic view of the structure of fig. 13 with the housing provided.
FIG. 15 is a schematic structural diagram of the security device of embodiment 6.
In the figure, an output assembly 1, a fixed cover plate 11, a fixed plate 12, an output shaft 13, a bracket 14, a permanent magnet stepping motor 2, a stator 21, a motor middle shaft 22, a rotor 23, an outlet box 3, a driving gear 15, an output gear 16, a primary duplicate gear 17, a secondary duplicate gear 18, a ball bearing 131 and a wave pad 19.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example one
As shown in fig. 1-2, the output assembly of the optical driving device, in which the optical driving device generally refers to a permanent magnet stepping motor, is not limited to a permanent magnet stepping motor, and can also be applied to other types of motors, and the structure of the output assembly is the same as the combination mode of the permanent magnet stepping motor, and only the output shaft of the output assembly needs to be connected with the central shaft of the motor. In the present embodiment, a permanent magnet stepping motor is taken as an example for detailed description. The permanent magnet stepping motor 2 comprises a stator 21 and a rotor 23, wherein the rotor 23 is connected with a motor center shaft 22. The output component 1 of the optical driving device is connected with a motor center shaft 22 of a permanent magnet stepping motor 2. Specifically, the output assembly 1 of the optical driving device of the present invention includes a bracket 14, a fixing plate 12, a fixing cover plate 11, an output gear 16, a gear transmission mechanism, a concentricity restraining structure, and an axial play limiting mechanism. The motor middle shaft 22 is connected with a driving gear 15, and the driving gear 15 is connected with a gear transmission mechanism. The fixing plate 12 is fixed on one end face of the stator 21 of the motor, and the bracket 14 is fixed on one end face of the fixing plate 12 far away from the stator 21 of the motor. As shown in fig. 14, the fixed cover plate 11 is fixed to the open end of the housing 20 of the motor.
As shown in fig. 2, 3 and 4, the gear transmission mechanism includes a driving gear 15, an output gear 16, two pairs of primary double gears 17 and two pairs of secondary double gears 18. Two primary double gears 17 are arranged and are symmetrically distributed by the axis line of the output shaft; two secondary duplicate gears 18 are arranged and are symmetrically distributed with the axial lead of the output shaft. The output gear 16 is disposed on the output shaft 13, in this embodiment, the output gear 16 is screwed on the output shaft 13, and two sides of the output gear 16 are respectively connected to a two-stage duplicate gear 18. Each secondary double gear 18 is in turn connected to a primary double gear 17. Each primary double gear 17 is in turn connected to the driving gear 15. The two first-level duplicate gears 17 are respectively positioned at two sides of the driving gear 15, and the driving gear 15 is connected with the motor middle shaft, so that the power source of the driving gear 15 comes from the motor middle shaft. The driving gear 15 is driven to rotate along with the rotation of the middle shaft of the motor, the driving gear 15 drives the two first-stage duplex gears 17 to rotate, the two first-stage duplex gears 17 drive the two second-stage duplex gears 18 connected with the two first-stage duplex gears 18 to rotate, and finally the output gear 16 connected with the two second-stage duplex gears 18 is driven to rotate, so that the output shaft 13 connected with the output gear 16 is driven to rotate, and the speed reduction output of the power of the motor is realized. In the above structure, the driving gear 15 is held by the two first-stage double gears 17 at both sides to rotate, so the motor center shaft 22 connected to the driving gear 16 is very stable in the radial direction, and axial movement in the radial direction is not easy to occur. Furthermore, the motor center shaft 22 is made of alloy materials, so that better strength can be ensured when the motor is stressed in the radial direction.
As shown in fig. 7, the rack 14 includes a rack bottom plate 142 and two support plates 141 vertically extending at both side edges of the rack bottom plate 142. As shown in fig. 1, the two supporting plates 141 have upper ends abutting against the lower bottom surface of the fixed cover plate 11 and lower ends abutting against the upper ground surface of the fixed plate 12, so that the two supporting plates 141 are equivalent to a supporting column between the fixed cover plate 11 and the fixed plate 12, and such supporting arrangement enhances the strength of the whole output assembly in the axial direction. Such a support structure is provided to both support and limit the freedom of the bracket 14 in the Z direction (i.e., the axial direction of the motor shaft) by the fixing cover 11.
As shown in fig. 5, 6 and 8, two fixing posts 145 are further disposed on the bottom surface of the bracket bottom plate 141, and the two fixing posts 145 are respectively engaged with two corresponding fixing holes 121 on the fixing plate 12. Such a structure can effectively limit the freedom of the support 14 in the X direction and the Y direction (i.e., the radial direction of the motor shaft), so that the whole output assembly is more stable.
As shown in fig. 7 and 12, two support steps 144 are further disposed at the avoiding position of the support base plate 141 of the support 14, and the two support steps 144 are respectively matched with the secondary duplicate gear 18 to support the secondary duplicate gear 18, so as to ensure that the secondary duplicate gear 18 is more fully meshed with the output gear 16.
As shown in fig. 5, 6 and 7, an avoiding through hole 143 is formed at a central position of the bracket bottom plate 142 for avoiding the motor center shaft 22. As shown in fig. 5 and 6, the motor central shaft 22 is directly matched with the output shaft 13 due to the avoidance of the avoidance through hole 143, and the matching manner of the motor central shaft 22 and the output shaft is only aligned in a centering manner and is not directly connected. However, the concentricity of the central shaft 22 and the output shaft 13 of the motor is greatly improved by the matching. Since the multi-stage gear output is generally an eccentric output in the prior art, for example, a stepping motor with high power density is disclosed in chinese patent publication No. CN 213521623U.
As shown in fig. 4, the rack bottom plate 142 of the rack 14 has a non-uniform thickness, and the rack bottom plate 142 further has a plurality of avoidance positions for avoiding gears in the gear transmission mechanism. Meanwhile, unnecessary parts are dug out of the structure of the support 14, and weight reduction grooves are arranged, so that the support 14 is lighter as a whole. In order to enhance the overall strength of the bracket, a reinforcing rib structure is also arranged, so that the bracket is light and has enough structural strength. The whole bracket is made of the same material as the gear, so that the friction force between the gear and the bracket is smaller when the gear rotates.
As shown in fig. 5, 6 and 6a, the concentricity restraining structure is provided between the output end of the motor center shaft 22 and the output gear 16. Specifically, the concentricity constraint structure includes a concentricity constraint hole 163 formed in the center of one end face of the output gear 16 close to the bracket 14, the output end of the motor center shaft 22 extends into the concentricity constraint hole 163, and the concentricity constraint hole 163 is in clearance fit with the output end of the motor center shaft 22. Because the concentricity restraining hole 163 is in clearance fit with the output end of the motor center shaft 22, the motor center shaft 22 and the output gear 16 in which the concentricity restraining hole 163 is located still rotate respectively. Because the output gear 16 is connected with the output shaft 13, and the axis of the output gear 16 is coincident with the axis of the output shaft 13; when the output end of the motor center shaft 22 extends into the concentricity restraining hole 163, the axis of the motor center shaft 22 coincides with the axis of the output gear 16; the motor bottom bracket 22 is then arranged concentrically with the output shaft 13, as shown in fig. 10 and 11. The concentricity of the whole mechanism is ensured, so that the final accurate focusing of the whole device is ensured.
As shown in fig. 5, 6 and 6a, the axial float limiting mechanism includes a first axial limiting mechanism and a second axial limiting mechanism, the first axial limiting mechanism is disposed between one end of the output gear 16 close to the bracket 14 and the bracket 14, and the second axial limiting mechanism is disposed between one end of the output gear 16 close to the fixed cover plate 11 and the fixed cover plate 11 to prevent the output gear 16 from axially floating.
As shown in fig. 5, 6 and 6a, the first axial stopper mechanism includes: and the first axial limiting convex ring is arranged on one end surface of the output gear 16 close to the bracket 14 and one end surface of the bracket 14 close to the output gear 16. Specifically, as shown in fig. 6, 6a, 7, 8 and 9, a circle of raised avoidance hole steps 146 are circumferentially arranged at an outer opening of an avoidance through hole 143 on one end surface of the bracket 14 close to the output gear 16, correspondingly, an output gear step 162 is also arranged at an opening edge of a concentricity constraint hole 163 of the output gear 16 close to the bracket 14, and the avoidance hole steps 146 and the output gear step 162 are butted with each other and then matched with each other through surfaces, so that a first axial limiting convex ring is formed. The first axial limiting convex ring ensures the stability of the first axial limiting mechanism through surface-to-surface contact of the avoidance hole step 146 and the output gear step 162. This first axial stop collar does not merely cooperate with the second axial stop mechanism to prevent axial play of the output gear 16. It is also ensured that the rotation of the output shaft 13 does not interfere with the carrier 14, ensuring a stable and immobile carrier 14 throughout the output assembly. And the avoidance through hole 143 can be further provided with a reaming hole 1431 at the position where the avoidance hole step 146 is arranged, so that the contact friction force is reduced. And the opening edge of the concentricity constraint hole 163 where the output gear step 162 is located is also provided with a chamfer 161, so that the motor middle shaft 22 can be conveniently inserted.
As shown in fig. 3, 5, 6 and 6a, the second axial limiting mechanism includes: a ball bearing 131, an inner ring of the ball bearing 131 being fixed to the output shaft 13, and an outer ring of the ball bearing 131 being fixed to the bearing fixing portion 111 of the fixed cover plate 11; the bearing further comprises a second axial limiting convex ring 19 which is arranged at one end of the ball bearing 131 close to the fixed cover plate 11, and the second axial limiting convex ring 19 props against the lower end face of the inner ring of the ball bearing 131. A wave pad 191 is further provided between the outer end of the outer race of the ball bearing 131 and the bearing fixing portion 111.
In the axial float limiting mechanism, the output gear 16 and the output shaft end are limited through the roller bearing 131 and the second axial limiting convex ring 19, and the output gear 16 and the shaft end in the motor are limited through the bracket 14 and the first axial limiting mechanism. Therefore, the output gear 16 is axially limited by the two limits, and axial circumferential movement does not occur.
The working process of the output assembly of the optical driving device provided by the invention is as follows: when the motor middle shaft 22 rotates along with the rotor, the driving gear 15 on the motor middle shaft 22 is driven to rotate; the two pairs of primary double gears 17 engaged on the driving gear 15 rotate under the action of the driving gear 15, thereby driving the secondary double gears 18 engaged on the primary double gears 17 to rotate. The output gear 16 engaged with the two pairs of secondary duplicate gears 18 rotates along with the rotation of the secondary duplicate gears, and further drives the output shaft 13 fixedly connected with the output gear 16 to rotate, and finally outputs power. The output assembly of the optical driving device is often used in the fields of placement and the like and is generally matched with a micro stepping motor for use, and because the micro stepping motor has small volume and corresponding parts have micro sizes, a gear transmission mechanism is directly adopted, so that the problems of low strength and unstable structure are easy to occur. The invention integrates a matched support structure in the gear transmission mechanism, combines various avoiding structures and supporting structures, ensures the integral strength and the mechanism stability of the whole gear transmission mechanism, and plays a role in bearing up and down. Furthermore, due to the arrangement of the support, the motor middle shaft and the output shaft can be directly matched, the concentricity is higher, and the output is more stable.
Example two
The other structure of this embodiment is the same as that of the first embodiment, and the difference structure is as follows: the concentricity constraint structure comprises a blind hole formed in the end face of the output end of the motor center shaft 22, a connecting column extends from the center of one end face of the output gear 16 close to the support 14, the tail end of the connecting column extends into the blind hole of the motor center shaft 22, and the blind hole and the connecting column are in clearance fit.
EXAMPLE III
The other structure of this embodiment is the same as that of the first embodiment, and the difference structure is as follows: the first axial limit convex ring is an output gear step 162 which is only arranged on one end surface of the output gear 16 close to the bracket 14 and is positioned at the connecting hole edge of the output gear 16, and the height dimension of the output gear step 162 in the axial direction is higher than that of the first embodiment.
Example four
The other structure of this embodiment is the same as that of the first embodiment, and the difference structure is as follows: the first axial limiting convex ring is a circle of convex avoidance hole steps 146 arranged on the outer opening of the avoidance through hole 143 on one end surface of the support 14 close to the output gear 16 along the circumferential direction, and the height dimension of the avoidance hole steps 146 in the axial direction is higher than that in the first embodiment.
EXAMPLE five
As shown in fig. 13 and 14, the optical driving apparatus having the output assembly according to the first embodiment further includes a motor housing 20, an outlet box 3, and the like.
EXAMPLE six
The security equipment is provided with the optical driving device in the fifth embodiment and further comprises a security monitoring lens and the like.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (13)

1. Output assembly of an optical drive device comprising an output shaft (13), characterized in that the output assembly further comprises:
a bracket (14) fixed on one end surface of a stator (21) of the motor;
the support plate (141) of the bracket (14) is supported on one surface, close to the bracket (14), of the fixed cover plate (11);
the output gear (16) is connected to one end of the output shaft (13) close to the motor center shaft (22), and the shaft axis of the output gear (16) is superposed with the shaft axis of the output shaft (13);
the output gear (16) is positioned between the bracket (14) and the fixed cover plate (11);
the concentricity constraint structure is arranged between the output end of the motor center shaft (22) and the output gear (16) so that the axis line of the motor center shaft (22) is coincident with the axis line of the output gear (16);
the axial float limiting mechanism comprises a first axial limiting mechanism and a second axial limiting mechanism, the first axial limiting mechanism is arranged between one end, close to the support (14), of the output gear (16) and the support (14), and the second axial limiting mechanism is arranged between one end, close to the fixed cover plate (11), of the output gear (16) and the fixed cover plate (11) to prevent the output gear (16) from moving axially;
and the gear transmission mechanism is used for transmitting the power output by the motor middle shaft (22) to the output gear (16) of the output shaft (13) so as to drive the output shaft (13) to rotate.
2. The output assembly of the optical driving device as claimed in claim 1, wherein the bracket (14) is provided with an avoiding through hole (143) at the center thereof for avoiding the motor center shaft (22) passing through the avoiding through hole (143).
3. An output assembly of an optical drive as claimed in claim 2, wherein the first axial stop mechanism comprises:
the first axial limiting convex ring is arranged on one end surface of the output gear (16) close to the support (14) and/or one end surface of the support (14) close to the output gear (16).
4. An output assembly of an optical drive as claimed in claim 2, wherein the second axial stop mechanism comprises:
an inner ring of the ball bearing (131) is fixed to the output shaft (13), and an outer ring of the ball bearing (131) is fixed to a bearing fixing portion (111) of the fixed cover plate (11);
and the second axial limiting convex ring (19) is arranged at one end of the ball bearing (131) close to the fixed cover plate (11), and the second axial limiting convex ring (19) props against the lower end surface of the inner ring of the ball bearing (131).
5. An output assembly of an optical drive as claimed in claim 4, wherein the second axial stop mechanism further comprises:
and a wave pad (191) provided between the outer end of the outer ring of the ball bearing (131) and the bearing fixing portion (111).
6. An output assembly of an optical drive as claimed in claim 1, further comprising:
the fixing plate (12) is fixed on one end face of a stator (21) of the motor, and the support (14) is fixed on one end face, far away from the stator (21) of the motor, of the fixing plate (12).
7. The output assembly of an optical drive according to claim 6, characterized in that the fixing plate (12) and the stator (21) are fixedly connected circumferentially.
8. The output assembly of the optical driving apparatus according to claim 7, wherein the lower surface of the bracket (14) is provided with at least two fixing posts (145), the fixing plate (12) is provided with at least two corresponding fixing holes (121), and the bracket (14) is fixed on the fixing plate (12) through the fixing posts (145).
9. An output assembly of an optical drive as claimed in claim 1, characterized in that the stationary cover plate (11) is fixed to the housing (20) of the motor open.
10. An output assembly of an optical drive as claimed in claim 6, wherein the gear transmission comprises:
the driving gear (15) is sleeved at the output end of the motor center shaft (22);
two primary duplicate gears (17) are arranged and are symmetrically distributed with the axial lead of the output shaft;
two primary duplicate gears (17) are rotatably arranged between the fixed cover plate (11) and the fixed plate (12), and one primary gear of the two primary duplicate gears (17) is meshed with the driving gear (15);
two secondary duplicate gears (18) are arranged and are symmetrically distributed with the axial lead of the output shaft;
two secondary duplicate gears (18) are rotatably arranged between the fixed cover plate (11) and the bracket (14), and the other primary gear of the two primary duplicate gears (17) is meshed with one secondary gear of the secondary duplicate gears (18);
the other secondary gear of the secondary duplicate gear (18) is meshed with the output gear.
11. An output assembly of an optical drive as claimed in claim 1, wherein the concentricity constraint structure comprises:
the concentricity restraining hole (163) is formed in the center of one end face, close to the support (14), of the output gear (16), the output end of the motor middle shaft (22) extends into the concentricity restraining hole (163), and the concentricity restraining hole (163) is in clearance fit with the output end of the motor middle shaft (22).
12. Optical drive device, characterized by an output assembly of an optical drive device according to any of claims 1-11;
the motor (2), motor (2) are step motor to motor (2) are connected with the output assembly of optical drive device.
13. A security device, characterized by an optical drive according to claim 12.
CN202111436611.7A 2021-11-29 2021-11-29 Output assembly, optical driving device and security equipment Active CN114222060B (en)

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