CN215445788U

CN215445788U - High-precision tripod head gear transmission mechanism

Info

Publication number: CN215445788U
Application number: CN202123072671.3U
Authority: CN
Inventors: 张然; 曹俊灵; 赵丽; 李馨柔; 高洪博
Original assignee: TIANJIN LIANDA COMMUNICATION DEVELOPMENT CO LTD
Current assignee: TIANJIN LIANDA COMMUNICATION DEVELOPMENT CO LTD
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-01-07
Anticipated expiration: 2031-12-09

Abstract

The utility model provides a high-precision tripod head gear transmission mechanism which comprises a motor, an elastic cylindrical pin, a driving gear, a shaft bracket and a middle bracket. The high-precision holder gear transmission mechanism provided by the utility model is reasonable in design and has compatibility: the mechanism adopts a technical means of adjusting the center distance of the gear, can be compatible with gears with different processing precisions in the same batch or gears, motors and other materials with different processing precisions in different batches, ensures that the offset of the center distance of the gear matching caused by precision errors in a reasonable range is adjustable, and reduces the idle stroke of the camera system to the maximum extent; the method has the following operability: in order to ensure the operability of the camera system under different assembly conditions, the mechanism does not adopt interference fit, pressure assembly or other assembly means which need complicated assembly methods, and is simply assembled by a method of visual adjustment through fastening screws, so that the operability of the mechanism is improved.

Description

High-precision tripod head gear transmission mechanism

Technical Field

The utility model belongs to the technical field of video monitoring, and particularly relates to a high-precision holder gear transmission mechanism.

Background

The environment mainly applied to the product is the environment monitoring of a port site and the operation condition monitoring of large-scale equipment such as a gantry crane, a stacker-reclaimer, a tipper, a ship loader and the like. In most monitoring items, the imaging system is installed at a position where an observation point is frequently adjusted, and therefore, the imaging system needs to have a function of adjusting an angle of view by rotating. Due to the extremely complicated field environment, many projects can select a camera system capable of continuously adjusting the view angle by 360 degrees for application. In the current camera system that can 360 continuous adjustment visual angles, the cooperation that mostly adopts the motor to drive the gear pair carries out camera system's rotation work, and because the machining precision of motor and gear pair, the restriction of assembly precision, when in-service use, because the service environment is mostly the vibration environment, one section idle stroke can appear in camera system, because the existence of this section idle stroke, produce the deviation when making camera system aim at the target observation point, the image information that provides user's needs that can not be fine. Therefore, a camera system which can continuously rotate for 360 degrees, has small idle stroke amount and high positioning precision, is simple and quick to operate when being aligned with a target observation point is urgently needed, so that the operation process is safer and more efficient.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a high-precision pan/tilt gear transmission mechanism, so as to solve the problems of abnormal use of a pan/tilt with an idle stroke due to machining errors and the idle stroke of a motor, and harsh and complicated working environment conditions, and to design a set of camera system including the high-precision pan/tilt gear transmission mechanism.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a high accuracy cloud platform gear drive, includes motor, elasticity cylindric lock, driving gear, pedestal and middle pallet, the motor is fixed to middle pallet one side, and the output shaft of motor passes middle pallet cover in the round hole of the center pin one end of driving gear, and the output shaft of driving gear and motor passes through elasticity cylindric lock and connect, and driving gear center pin other end cup joints to the pedestal, and the pedestal is fixed to middle pallet opposite side, the driver signal connection of motor to the controller.

Further, still include outer axle sleeve, the outer axle sleeve cover is located the output shaft outer wall of motor.

Furthermore, the gear box further comprises 2 semicircular shaft sleeves, and the semicircular shaft sleeves are symmetrically sleeved in the middle of the driving gear.

Furthermore, a limiting hole is formed in the middle of the shaft bracket, a central shaft of the driving gear is movably sleeved in the limiting hole, and a gap is reserved between the limiting hole and the central shaft of the driving gear.

Further, the width of the gap is 0.05 mm.

Furthermore, the outer shaft sleeve and the semicircular shaft sleeve are made of nylon materials.

Furthermore, a threaded hole is formed in the surface of the middle supporting plate frame, a shaft frame is fixedly installed in the threaded hole, and a long through hole is formed in the bottom of the shaft frame.

Compared with the prior art, the high-precision holder gear transmission mechanism has the following advantages:

(1) the high-precision holder gear transmission mechanism provided by the utility model is reasonable in design and has compatibility: the mechanism adopts a technical means of adjusting the center distance of the gear, can be compatible with gears with different processing precisions in the same batch or gears, motors and other materials with different processing precisions in different batches, ensures that the offset of the center distance of the gear matching caused by precision errors in a reasonable range is adjustable, and reduces the idle stroke of the camera system to the maximum extent; the method has the following operability: in order to ensure the operability of the camera system under different assembly conditions, the mechanism does not adopt interference fit, pressure assembly or other assembly means which need complicated assembly methods, and is simply assembled by a method of visual adjustment through fastening screws, so that the operability of the mechanism is improved.

(2) The high-precision holder gear transmission mechanism provided by the utility model has the following stability: the spur gear pair matching mechanism with adjustable center distance designed by the mechanism greatly reduces the phenomenon of increasing the idle stroke amount of the whole camera system caused by the shaking of the gear shaft due to the increase of the limit of the shaft bracket, and has more compact and stable structure; the method has the following advantages: the camera system is technically improved on the basis of keeping original powerful functions, and the designed parts have the characteristics of low cost, small size and simplicity in processing, so that the whole camera system has higher cost performance.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic diagram of a camera system according to an embodiment of the present invention;

FIG. 2 is an elevational view of the overall structure according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of the overall structure according to the embodiment of the present invention.

Description of reference numerals:

1. a motor; 2. an outer sleeve; 3. an elastic cylindrical pin; 4. a semicircular shaft sleeve; 5. a driving gear; 6. a pedestal; 7. a middle pallet frame; 8. a camera device; 9. a holder.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 3, the high-precision pan/tilt head gear transmission mechanism includes a motor 1, an elastic cylindrical pin 3, a driving gear 5, a shaft bracket 6 and a middle supporting plate bracket 7, the motor 1 is fixed to one side of the middle supporting plate bracket 7, an output shaft of the motor 1 passes through the middle supporting plate bracket 7 and is sleeved in a circular hole at one end of a central shaft of the driving gear 5, then the driving gear 5 and the output shaft of the motor 1 are connected together by the elastic cylindrical pin 3, the other end of the central shaft of the driving gear 5 is sleeved to the shaft bracket 6, the shaft bracket 6 is fixed to the other side of the middle supporting plate bracket 7, a driver of the motor 1 is in signal connection with a controller, in this embodiment, the high-precision pan/tilt head gear transmission mechanism is located inside a pan/tilt head 9, one side of the pan/tilt head 9 is in bolted connection with a camera device 8, the pan/tilt head 9 and the camera device 8 form a camera system, the controller is a prior art and can be a single chip microcomputer or a PLC, the motor 1 is a direct current motor, and the high-precision holder gear transmission mechanism is reasonable in design and has compatibility: the mechanism adopts a technical means of adjusting the center distance of the gear, can be compatible with gears with different processing precisions in the same batch or gears, motors and other materials with different processing precisions in different batches, ensures that the offset of the center distance of the gear matching caused by precision errors in a reasonable range is adjustable, and reduces the idle stroke of the camera system to the maximum extent; the method has the following operability: in order to ensure the operability of the camera system under different assembly conditions, the mechanism does not adopt interference fit, pressure assembly or other assembly means which need complicated assembly methods, and is simply assembled by a method of visual adjustment through fastening screws, so that the operability of the mechanism is improved.

Still include outer axle sleeve 2, the outer axle sleeve 2 cover is located the output shaft outer wall of motor 1. The outer shaft sleeve 2 is used for guaranteeing the stability of the rotation of an output shaft of the motor 1 and further comprises 2 semicircular shaft sleeves 4 and 2, and the middle parts of the driving gears 5 are symmetrically sleeved on the semicircular shaft sleeves 4. The semicircular shaft sleeve 4 is used for ensuring the stability of the rotation of the output shaft of the driving gear 5.

A limiting hole is formed in the middle of the shaft bracket 6, a central shaft of the driving gear 5 is movably sleeved in the limiting hole, and a gap is reserved between the limiting hole and the central shaft of the driving gear 5. The size of the limiting hole and the size of the output shaft (namely the central shaft of the driving gear 5) form clearance fit of shaft hole fit. This gear drive possesses stability: the spur gear pair matching mechanism with adjustable center distance designed by the mechanism greatly reduces the phenomenon that the idle stroke of the whole camera system is increased due to the shaking of the gear shaft because the limit of the shaft bracket 6 is added, and the structure is more compact and stable; the method has the following advantages: the camera system is technically improved on the basis of keeping original powerful functions, and the designed parts have the characteristics of low cost, small size and simplicity in processing, so that the whole camera system has higher cost performance.

The width of the gap is 0.05 mm. The function of the clearance is: the excessive separation of reference circles caused by the dual functions of the shaking of the output shaft of the motor 1 and the cantilever structure is limited, the generated gear pair is not tightly matched, and the unstable working state occurs.

The outer shaft sleeve 2 and the semicircular shaft sleeve 4 are made of nylon materials. The nylon material is small in size, less in material consumption and low in processing cost, so that the practicability of the transmission mechanism is further improved.

Threaded holes are formed in the surface of the middle supporting plate frame 7, the shaft frame 6 is fixedly installed in the threaded holes, long through holes are formed in the bottom of the shaft frame 6 and are matched with the threaded holes, the purpose of each long through hole is to adjust the position between the shaft frame 6 and the middle supporting plate frame 7, and the technical means of adjusting the center distance of the gear is achieved by adjusting the connecting position of each long through hole and the corresponding threaded hole.

Example 1

The camera device with the high-precision holder gear transmission mechanism has the characteristics of 360-degree continuous rotation, small idle stroke amount, high positioning precision, simple and quick operation of aiming at a target observation point, and simultaneously has the characteristics of shock resistance, high stability and low cost.

The system design solves the following problems:

1. the gear pair has high matching precision: the mechanism adopts a structural form that the center distance of the spur gear can be adjusted, the center distance of two teeth can be adjusted to a reasonable numerical value according to the actual processing condition when the gear is installed, then the gear is fastened by a screw, so that two circle divisions are always in an adjustable tangent state, the upper part of the driving gear 5 is connected with a direct current speed reducing motor, a reduction gearbox is integrated in the motor 1, the torque is increased, and the rotating speed is reduced. The top end of the driving gear 5 is provided with a shaft, the limit is added to the driving gear 5 in a hole-shaft matched relation, so that the gear pair cannot shake due to the cantilever structure, and the matching precision of the gear pair is improved.

2. The gear pair works stably: this mechanism has increased at gear pair top and has stabilized stop gear, and the axle goes out on 5 tops of driving gear, goes out axle position control driving gear 5 and processes out the axle precision, increases complex pedestal 6 outside going out the axle with it, and 6 intermediate positions trompils of pedestal, the size in hole and the size of going out the axle form shaft hole complex clearance fit, clearance volume 0.05 mm. The excessive separation of reference circles caused by the dual functions of the shaking of the output shaft of the motor 1 and the cantilever structure is limited, the generated gear pair is not tightly matched, and the unstable working state occurs.

3. The installation is simple and convenient: contain a motor 1 in this mechanism, direct current gear motor promptly, direct current gear motor customization play axle trompil, 1 off-axial of motor increases outer axle sleeve 2 and is used for stabilizing the cantilever, driving gear 5 adopts 3 elastic connection of elasticity cylindric lock with 1 play axle of motor, 5 middle part positions of driving gear increase two semicircle axle sleeves 4, increase driving gear 5's rotating characteristic and increase stability, with the device insert middle bracket frame, use 4M 4 screw fixed pedestal 6 in the bottom, simple installation.

4. The material cost is saved: the outer shaft sleeve 2 and the semicircular shaft sleeve 4 are machined from nylon materials, and are small in size, few in material consumption and low in machining cost. The elastic cylindrical pin 2 is a standard part, the shaft bracket 6 is a sheet metal bending part, and the processing and material costs are both low. The driving gear 5 adopts a non-dislocation spur gear, so that the processing difficulty is reduced, and the processing cost is reduced. Meanwhile, the installation is simple and convenient, and the labor cost is saved.

5. And (3) reducing the failure rate of the equipment: the parts have compact and small structure, occupy less internal space of the equipment, are not easy to wear, reduce the failure rate of the equipment and increase the reliability of the operation of the equipment.

6. The working efficiency is improved: by adding the stabilizing mechanism, the idle stroke amount of the camera system is reduced, the camera system can position a target observation point more accurately, a user can easily position the observation position without repeatedly adjusting the position, the working efficiency is improved, the system can be used for carrying out all-weather observation on construction and working sites under different application scenes, and the field condition can be judged quickly and accurately.

The camera system (see figure 1) has the horizontal 360-degree rotation function and the vertical plus-minus 90-degree rotation function. Comprises a tripod head 9 and a camera device 8.

The mechanism is one of key components of a holder 9 and comprises a motor 1, an outer shaft sleeve 2, an elastic cylindrical pin 3, a semicircular shaft sleeve 4, a driving gear 5, a shaft bracket 6, a middle supporting plate bracket 7 and the like (see attached figures 2 and 3).

The working principle of the high-precision cradle head gear transmission mechanism is as follows:

when in actual use, this mechanism needs external power supply, the power is received on motor 1, motor 1 rotates the work, motor 1 contains the reducing gear box, the high rotational speed that produces motor 1 coil rotation, through slowing down, the rotational speed is for turning round, increase the rotation torque, the outside is connected with driving gear 5 through elasticity cylindric lock 3, realize the power supply of driving gear 5, driving gear 5 meshes with the driven gear of cloud platform 9, through the radial position of adjustable driving gear 5, compensate because the machining error of driving gear 5 or motor 1 and other machined part, make the centre-to-centre spacing of gear pair keep at reasonable numerical value, the reference circle is tangent, need not to shift and can reach the gear drive of high accuracy.

The scheme can be applied to the application places with vibration, outdoor and multi-point monitoring. As a high-precision cradle head gear transmission mechanism, the cradle head gear transmission mechanism is additionally provided with a low-cost stable limiting structure design on the basis of the original gear transmission, and the observation effect of a camera system in different environments, long time and high load working states is ensured.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit of the present invention are intended to be included therein.

Claims

1. High accuracy cloud platform gear drive, its characterized in that: including motor (1), elasticity cylindric lock (3), driving gear (5), pedestal (6) and middle supporting plate frame (7), motor (1) is fixed to middle supporting plate frame (7) one side, and the output shaft of motor (1) passes middle supporting plate frame (7) cover in the round hole of the center pin one end of driving gear (5), and the output shaft of driving gear (5) and motor (1) passes through elasticity cylindric lock (3) and connects, and driving gear (5) center pin other end cup joints to pedestal (6), and pedestal (6) are fixed to middle supporting plate frame (7) opposite side, the driver signal connection of motor (1) to the controller.

2. The high accuracy cloud platform gear drive of claim 1, characterized in that: the motor is characterized by further comprising an outer shaft sleeve (2), wherein the outer shaft sleeve (2) is sleeved on the outer wall of the output shaft of the motor (1).

3. The high accuracy cloud platform gear drive of claim 2, characterized in that: still include 2 semicircle axle sleeves (4), 2 semicircle axle sleeve (4) symmetry cover is located driving gear (5) middle part.

4. The high accuracy cloud platform gear drive of claim 1, characterized in that: a limiting hole is formed in the middle of the shaft bracket (6), a central shaft of the driving gear (5) is movably sleeved in the limiting hole, and a gap is reserved between the limiting hole and the central shaft of the driving gear (5).

5. The high accuracy cloud platform gear drive of claim 4, characterized by: the width of the gap is 0.05 mm.

6. The high accuracy cloud platform gear drive of claim 3, characterized by: the outer shaft sleeve (2) and the semicircular shaft sleeve (4) are made of nylon materials.

7. The high accuracy cloud platform gear drive of claim 1, characterized in that: threaded holes are formed in the surface of the middle supporting plate frame (7), a shaft frame (6) is fixedly installed in the threaded holes, and a long through hole is formed in the bottom of the shaft frame (6).