Driving device and pan-tilt camera

Abstract

The utility model provides a kind of driving device and cloud platform camera, driving device includes: drive part;Support, with mounting hole;Driving gear, with drive part drive connection;Gear shaft, gear shaft has axle body and driven tooth, axle body is arranged at mounting hole, driven tooth and driving gear are mutually engaged;Adjusting structure, between mounting hole and axle body, adjusting structure can adjust the axle center distance between driving gear and driven tooth.Through the technical scheme provided by the utility model, the rotation of the cloud platform camera in the prior art is usually realized by bearing, and the axle center distance of the driving gear and the driven gear cannot be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of drive device technology, and more specifically, to a drive device and a pan-tilt camera. Background Technology

[0002] Currently, the design of PTZ cameras typically relies on the interaction of gears and bearings to achieve the rotation function of the camera components.

[0003] However, this bearing-dependent structural design uses a fixed shaft center distance for the drive and driven gears, which cannot be adjusted. If the meshing between the drive and driven gears is too tight, it will cause meshing jamming; if the meshing is too loose, it will cause noise problems, resulting in a poor user experience for the PTZ camera. Utility Model Content

[0004] This utility model provides a driving device and a PTZ camera to solve the problem that in the prior art, the rotation of the PTZ camera is usually achieved through bearings, and the center distance between the drive gear and the driven gear cannot be adjusted.

[0005] According to one aspect of the present invention, a driving device is provided, comprising: a driving part; a bracket having a mounting hole; a driving gear drivingly connected to the driving part; a gear shaft having a shaft body and a driven tooth, the shaft body being disposed at the mounting hole, the driven tooth meshing with the driving gear; and an adjusting structure located between the mounting hole and the shaft body, the adjusting structure being capable of adjusting the center distance between the driving gear and the driven tooth.

[0006] Furthermore, the adjustment structure has a connecting end and an elastic end that are arranged opposite to each other. The connecting end is connected to the inner wall of the mounting hole, and the elastic end abuts against the outer wall of the shaft. The elastic end can provide radial elastic force to the shaft.

[0007] Furthermore, the adjustment structure includes a plurality of first elastic elements, which are distributed circumferentially along the shaft.

[0008] Furthermore, the first elastic element has a first segment, a second segment, and a third segment connected in sequence. The first segment and the third segment both extend along the axial direction of the shaft. The first segment has a protrusion on the side facing the shaft, which abuts against the shaft. The side of the protrusion facing the shaft forms an elastic end. The side of the third segment away from the first segment is connected to the bracket. The side of the third segment away from the shaft forms a connecting end. The top of the third segment abuts against the driven tooth.

[0009] Furthermore, the drive unit also includes an axial limiting structure for limiting the axial displacement of the gear shaft.

[0010] Furthermore, an axial limiting structure is provided on the upper cover plate. The shaft has an upper section and a lower section arranged opposite to each other. The axial limiting structure is sleeved on the outer periphery of the upper section of the shaft, and the driven tooth is located between the upper section and the lower section. The axial limiting structure has a fixed end and a free end arranged opposite to each other. The fixed end is connected to the upper cover plate. Along the axial direction of the shaft, the free end abuts against the top wall of the driven tooth. Along the radial direction of the shaft, there is a gap between the free end and the shaft.

[0011] Furthermore, the axial limiting structure includes a plurality of second elastic elements, which are distributed circumferentially along the shaft. The second elastic elements extend from the upper cover plate toward the shaft. The end of the second elastic element away from the shaft forms a fixed end, and the end of the second elastic element close to the shaft forms a free end.

[0012] Furthermore, the free end has a protrusion on the side facing the driven tooth, the protrusion extending axially along the shaft and abutting against the top wall of the driven tooth.

[0013] Furthermore, the bottom of the shaft has a connection hole, which is connected to the camera assembly via fasteners.

[0014] According to another aspect of the present invention, a pan-tilt camera is provided, which includes a camera assembly and the aforementioned driving device, wherein the driving device is drivingly connected to the camera assembly.

[0015] By applying the technical solution of this utility model, the center distance between the driven gear and the driving gear is adjusted through an adjustment structure. Compared with the prior art where the center distance between the driving gear and the driven gear is fixed and cannot be adjusted, this application, through the above-mentioned setting, can maintain the driven gear and the driving gear in an optimal meshing state. This avoids the problems of meshing jamming caused by excessively tight meshing between the driven gear and the driving gear, and increased noise and excessive play in the drive unit caused by excessively loose meshing. This makes the gear shaft transmission response more agile, reduces the play effect of the drive unit during start-up and stop, i.e., the backlash between gears, thereby improving the response speed and operational smoothness of the device. At the same time, by setting the adjustment structure between the mounting hole and the shaft, the adjustment structure can directly drive and adjust the shaft of the gear shaft. The driving process is simple and direct, improving the adjustment efficiency. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A partial exploded view of the gimbal camera in the embodiment provided by this utility model is shown;

[0018] Figure 2A partial cross-sectional view of the drive device in an embodiment provided by this utility model is shown.

[0019] The above figures include the following reference numerals:

[0020] 10. Drive gear;

[0021] 20. Gear shaft; 201. Threading hole; 202. Connecting hole; 21. Shaft body; 22. Driven gear;

[0022] 30. Adjustment structure; 301. Elastic end; 31. First elastic element; 311. First section; 312. Second section; 313. Third section;

[0023] 40. Axial limiting structure; 401. Free end; 41. Second elastic element; 411. Protrusion;

[0024] 01. Drive unit; 02. Bracket; 021. Mounting hole; 03. Top cover plate; 031. Screw hole; 06. Camera assembly. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] like Figure 1 As shown, this embodiment of the present invention provides a driving device, which includes a driving unit 01, a bracket 02, a driving gear 10, a gear shaft 20, and an adjusting structure 30. The bracket 02 has a mounting hole 021. The driving gear 10 is drivenly connected to the driving unit 01. The gear shaft 20 has a shaft body 21 and a driven tooth 22. The shaft body 21 is disposed at the mounting hole 021 and connected to the camera assembly 06. The shaft body 21 can rotate within the mounting hole 021, and the driven tooth 22 meshes with the driving gear 10. The adjusting structure 30 is located between the mounting hole 021 and the shaft body 21, and the adjusting structure 30 can adjust the axial distance between the driving gear 10 and the driven tooth 22.

[0027] The specific structure of the adjustment structure 30 is not limited; it can be a telescopic component or an elastic component with radial telescopic function, as long as it can adjust the center distance between the driving gear 10 and the driven gear 22. The drive unit 01 is not limited; it can drive the driving gear 10 to rotate. In this embodiment, the drive unit 01 is a motor.

[0028] By applying the technical solution of this utility model, the center distance between the driven gear 22 and the driving gear 10 is adjusted by adjusting the structure 30. Compared with the prior art where the driving gear and driven gear have a fixed center distance that cannot be adjusted, this application, through the above-mentioned setting, can maintain the driven gear 22 and the driving gear 10 in a better meshing state. This avoids the problems of meshing jamming caused by excessively tight meshing between the driven gear 22 and the driving gear 10, as well as increased noise and increased play in the drive unit 01 caused by excessively loose meshing. This makes the transmission response of the gear shaft 20 more agile and reduces the play effect of the drive unit 01 during start-up and stop, i.e., the backlash between gears, thereby improving the response speed and smoothness of operation of the device. At the same time, by setting the adjustment structure 30 between the mounting hole 021 and the shaft 21, the adjustment structure 30 can directly drive and adjust the shaft 21 of the gear shaft 20. The driving process is simple and direct, improving the adjustment efficiency.

[0029] In some embodiments, the adjusting structure 30 has a connecting end and an elastic end 301 disposed opposite to each other. The connecting end is connected to the inner wall of the mounting hole 021, and the elastic end 301 abuts against the outer wall of the shaft 21. The elastic end 301 can provide a radial elastic force to the shaft 21. Thus, the adjusting structure 30 can provide an instantaneous reverse force when the shaft 21 is subjected to a radial external force, realizing adaptive adjustment of the center distance between the driven gear 22 and the driving gear 10. It can be understood that when the shaft 21 is too far from the driving gear 10, that is, when the center distance between the gear shaft 20 and the driving gear 10 is too large, the adjusting structure 30 can drive the gear shaft 20 closer to the driving gear 10; when the shaft 21 is too close to the driving gear 10, that is, when the center distance between the gear shaft 20 and the driving gear 10 is too small, the adjusting structure 30 can drive the gear shaft 20 away from the driving gear 10. The above settings can reduce the offset of the gear shaft 20 caused by external forces, ensure that the center distance between the gear shaft 20 and the driving gear 10 is within an optimal range, and enhance the flexibility and stability of the transmission.

[0030] The adjustment structure 30 can be an overall ring-shaped elastic structure that covers the circumference of the shaft 21, or only part of it can be an elastic structure, as long as it can provide radial elastic force to the shaft 21.

[0031] In some embodiments, the adjustment structure 30 includes a plurality of first elastic elements 31, which are spaced apart circumferentially along the shaft 21. This arrangement ensures that the shaft 21 is subjected to a balanced radial force in the circumferential direction. This balanced force distribution helps maintain the centered position of the shaft 21, avoiding eccentricity or vibration caused by single-point or unbalanced forces, thus improving the smoothness and efficiency of the transmission. Furthermore, compared to a single elastic element, the multiple spaced-apart first elastic elements 31 provide stronger radial support, effectively preventing radial displacement of the shaft 21 even under high-speed or high-load conditions, significantly enhancing the radial stability of the entire drive unit.

[0032] In this application, the number of first elastic elements 31 is not limited, and can be set to 3, 6 or 10, etc. The first elastic elements 31 can be set on the shaft 21 or on the bracket 02.

[0033] like Figure 2 As shown, in some embodiments, the first elastic member 31 has a first segment 311, a second segment 312, and a third segment 313 connected in sequence. The first segment 311 and the third segment 313 both extend along the axial direction of the shaft 21. The extension direction of the second segment 312 forms an angle with the axial direction of the shaft 21, thus creating a radial gap between the first segment 311 and the third segment 313, providing radial adjustment space for the shaft 21. The first segment 311 has a protrusion on the side facing the shaft 21, which abuts against the shaft 21, allowing the first elastic member 31 to adjust the shaft 21 radially. The side of the protrusion facing the shaft 21 forms an elastic end 301. The side of the third segment 313 away from the first segment 311 is connected to the bracket 02, forming a connecting end. The top end of the third segment 313 abuts against the driven tooth 22 to provide axial support for the gear shaft 20.

[0034] In a preferred embodiment of this application, the protrusion and the shaft 21 are interference-fitted, so that the first elastic element 31 can provide more stable support for the gear shaft 20 in the radial direction.

[0035] The protrusion and the top of the third segment 313 abut against the side wall of the shaft 21 and the bottom wall of the driven tooth 22, respectively. This provides a small frictional force to the gear shaft 20. Compared with the prior art where the shaft 21 and the bracket 02 are connected by a bearing, the bearing's clearance and ultra-low frictional resistance inevitably cause inertial movement of the camera component 06 when the pan-tilt camera stops suddenly. With the above-mentioned setting, a certain amount of friction can make the driven gear shaft 20 have inertial rotation, reducing the inertial movement caused by the sudden stop of the pan-tilt, improving the stability of the monitoring image of the camera component 06, and eliminating the need for additional components to prevent the inertial movement of the camera component 06, thus reducing production and maintenance costs.

[0036] In other embodiments, the extending directions of the first segment 311 and the third segment 313 may be at an angle to the axial direction of the shaft 21.

[0037] In this application, the specific structure of the second segment 312 is not limited; it can be a straight segment, a wavy segment, or an arc segment. In this embodiment, the second segment 312 is specifically an arc segment. This facilitates processing, reduces stress concentration at different locations of the first elastic element 31, reduces the possibility of breakage at the connection points of different segments of the first elastic element 31, and extends the service life of the first elastic element 31. The bracket 02 can be made of plastic or metal.

[0038] In some embodiments, the first elastic element 31 and the bracket 02 are separate components; in other embodiments, the first elastic element 31 and the bracket 02 are integrally formed.

[0039] like Figure 1 As shown, in some embodiments, the drive device further includes an axial limiting structure 40 for limiting the axial displacement of the gear shaft 20. The axial limiting structure 40 effectively prevents unnecessary axial movement of the gear shaft 20, keeping the driven gear rotating horizontally, reducing wobbling, and preventing excessive axial spacing between the gear shaft 20 and the driving gear 10, thus ensuring the axial position stability of the gear shaft 20 during operation and improving the stability of the gear shaft 20's transmission and rotation. Furthermore, it reduces unnecessary wear between the shaft 21 and other components, helping to extend the service life of the drive device, reduce maintenance and replacement frequency, and lower overall operating costs.

[0040] Specifically, the axial limiting structure 40 is disposed on the upper cover plate 03. The shaft body 21 has an upper section and a lower section that are disposed opposite to each other. The axial limiting structure 40 is sleeved on the outer periphery of the upper section of the shaft body 21. The driven tooth 22 is located between the upper section and the lower section. The first elastic element 31 is located on the outer periphery of the lower section and is located near the upper section. Thus, the elastic end 301 is located near the middle of the shaft body 21 along the axial direction. Compared with being disposed at the top or bottom of the shaft body 21, this improves the stability of adjustment.

[0041] like Figure 2As shown, in some embodiments, the axial limiting structure 40 has a fixed end and a free end 401 arranged opposite to each other. The fixed end is connected to the upper cover plate 03. Along the axial direction of the shaft 21, the free end 401 abuts against the top wall of the driven gear 22. The connection between the axial limiting structure 40 and the upper cover plate 03 ensures its fixed position. At the same time, the abutment between the free end 401 and the top wall of the driven gear 22 provides precise axial positioning for the shaft 21, which helps to maintain the optimal meshing state between the gears and reduces the impact of axial movement on transmission efficiency. At the same time, the abutment can provide friction for the driven gear 22, further providing a small friction force to the gear shaft 20, thereby reducing the inertial sway caused by the sudden stop of the pan-tilt unit and improving the stability of the monitoring image of the camera assembly 06. Along the radial direction of the shaft 21, there is a gap between the free end 401 and the shaft 21. The gap defines the maximum radial adjustment range of the gear shaft 20 and can prevent excessive elastic deformation of the first elastic element 31 from affecting the normal meshing between the gear shaft 20 and the driving gear 10.

[0042] In some embodiments, the axial limiting structure 40 includes a plurality of second elastic elements 41, which are spaced apart circumferentially along the shaft 21. Each second elastic element 41 extends from the upper cover plate 03 toward the shaft 21. The end of each second elastic element 41 away from the shaft 21 forms a fixed end, and the end of each second elastic element 41 near the shaft 21 forms a free end 401. The uniform distribution of the plurality of second elastic elements 41 along the circumference of the shaft 21 ensures that the shaft 21 is subjected to a balanced axial force, preventing the shaft 21 from tilting or wobbling during operation, thus improving the smoothness and efficiency of the transmission.

[0043] like Figure 1 As shown, in some embodiments, the upper cover plate 03 is provided with multiple screw holes 031. The upper cover plate 03 is connected to the bracket 02 by screws. The screw holes 031 are oblong holes, so the upper cover plate 03 can move radially relative to the bracket 02, thereby further slightly adjusting the center distance between the gear shaft 20 and the drive gear 10, improving the flexibility of adjustment.

[0044] like Figure 2 As shown, in some embodiments, the free end 401 has a protrusion 411 on the side facing the driven tooth 22. The protrusion 411 extends axially along the shaft 21 and abuts against the top wall of the driven tooth 22. The protrusion 411 can both ensure axial positioning of the driven tooth 22 and avoid excessive friction caused by an excessively large contact area, thus ensuring the smooth rotation of the gear shaft 20 and keeping the friction between the free end 401 and the driven tooth 22 within a suitable range.

[0045] In some embodiments, the bottom of the shaft 21 has a connecting hole 202, which is connected to the camera assembly 06 via fasteners. This design securely fixes the camera assembly to the shaft 21 using fasteners, ensuring a stable connection between the camera assembly 06 and the shaft 21 during rotation. This improves the rigidity and reliability of the overall structure, further reduces vibration of the camera assembly 06 during operation, and enhances the image quality of the camera assembly 06.

[0046] In some embodiments, the shaft 21 also has a wire hole 201, which extends through the shaft 21 along the axial direction. The wire hole 201 is used for the cable to pass through, thus avoiding rotational wear caused by the cable passing through the shaft.

[0047] According to another embodiment of the present invention, a PTZ camera is provided, which includes a camera assembly 06 and a driving device mentioned in the above embodiment, wherein the driving device is drivingly connected to the camera assembly 06.

[0048] The technical solution provided in this application has the following advantages:

[0049] 1. A transmission structure without bearings is adopted. The radial position of the gear shaft 20 is fixed by several first elastic elements 31 on the bracket 02. The first elastic elements 31 are elastic, and the gear shaft 20 can move slightly radially. The distance between the gear shaft and the axis of the driving gear 10 can be adjusted adaptively to adjust the meshing clearance between the gears.

[0050] 2. The lower end face of the driven tooth 22 is in positive pressure contact with the first elastic element 31, and the upper end face of the driven tooth 22 is in positive pressure contact with the second elastic element 41. There is a small friction force, which makes the gear shaft 20 have inertial rotation, avoiding inertial sway caused by sudden stop of the gimbal.

[0051] 3. The upper cover plate 03 is provided with several second elastic elements 41. The protrusions 411 on the second elastic elements 41 press against the upper end face of the driven tooth 22, so that the gear shaft 20 remains horizontal at all times and rotates without shaking.

[0052] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0053] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0054] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0055] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0056] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A driving device, characterized in that, The driving device includes: Drive unit; The bracket has mounting holes; The drive gear is driven by the drive unit. A gear shaft having a shaft body and a driven tooth, the shaft body being disposed at the mounting hole, and the driven tooth meshing with the driving gear; An adjustment structure is located between the mounting hole and the shaft, and the adjustment structure can adjust the center distance between the driving gear and the driven gear.

2. The driving device according to claim 1, characterized in that, The adjustment structure has a connecting end and an elastic end arranged opposite to each other. The connecting end is connected to the inner wall of the mounting hole, and the elastic end abuts against the outer wall of the shaft. The elastic end can provide radial elastic force to the shaft.

3. The driving device according to claim 2, characterized in that, The adjustment structure includes a plurality of first elastic elements, which are distributed circumferentially along the shaft.

4. The driving device according to claim 3, characterized in that, The first elastic element has a first segment, a second segment, and a third segment connected in sequence. The first segment and the third segment both extend along the axial direction of the shaft. The first segment has a protrusion on the side facing the shaft, and the protrusion abuts against the shaft. The side of the protrusion facing the shaft forms the elastic end. The third segment is connected to the bracket on the side away from the first segment, the third segment forms the connecting end on the side away from the shaft, and the top of the third segment abuts against the driven tooth.

5. The driving device according to claim 1, characterized in that, The drive device also includes an axial limiting structure for limiting the axial displacement of the gear shaft.

6. The driving device according to claim 5, characterized in that, The axial limiting structure is disposed on the upper cover plate, the shaft has an upper section and a lower section disposed opposite to each other, the axial limiting structure is sleeved on the outer periphery of the upper section of the shaft, and the driven tooth is located between the upper section and the lower section; The axial limiting structure has a fixed end and a free end arranged opposite to each other. The fixed end is connected to the upper cover plate. Along the axial direction of the shaft, the free end abuts against the top wall of the driven tooth. Along the radial direction of the shaft, there is a gap between the free end and the shaft.

7. The driving device according to claim 6, characterized in that, The axial limiting structure includes a plurality of second elastic elements, which are distributed circumferentially along the shaft. The second elastic elements extend from the upper cover plate toward the shaft. The end of the second elastic element away from the shaft forms the fixed end, and the end of the second elastic element close to the shaft forms the free end.

8. The driving device according to claim 7, characterized in that, The free end has a protrusion on the side facing the driven tooth, the protrusion extending axially along the shaft and abutting against the top wall of the driven tooth.

9. The driving device according to claim 1, characterized in that, The bottom of the shaft has a connection hole, which is connected to the camera assembly via a fastener.

10. A pan-tilt camera, characterized in that, The pan-tilt camera includes a camera assembly and a driving device as described in any one of claims 1 to 9, wherein the driving device is drivingly connected to the camera assembly.

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