Driving device for a pan-tilt camera

Abstract

A driving device for a pan-tilt camera includes a first driving assembly, a second driving assembly, a driving gear set, a U-shaped frame, and a rotating bracket. The driving gear set includes an internal gear and an external gear coaxially arranged, with the external gear movably sleeved outside the internal gear. Spur gears are positioned at the upper ends of both the internal and external gears, and bevel gears at their lower ends. The first driving assembly drives the external gear to rotate, and the second driving assembly drives the internal gear to rotate. A first vertical bevel gear and a second vertical bevel gear are coaxially arranged inside the U-shaped frame. This invention achieves parallel placement of two motors at the bottom of the bracket through bevel gear transmission, thus significantly reducing the overall size and cost compared to traditional pan-tilt structures. It is suitable for mounting small cylindrical cameras. When the first and second motors move in the same direction at the same speed, the U-shaped frame drives the camera to move horizontally; when the first and second motors move in opposite directions at the same speed, the U-shaped frame drives the camera to move vertically.

Description

Technical Field

[0001] This invention belongs to the field of security monitoring products, specifically a driving device for a PTZ camera. Background Technology

[0002] Pan-tilt cameras are widely used in public places such as train stations, airports, and roadsides. Powered by a motor, the camera lens can be rotated in a predetermined direction, allowing a single monitoring point to monitor multiple directions.

[0003] In practical applications, the stability, accuracy, and structural dimensions of the transmission mechanism driving the camera's core all affect the overall performance of the camera. Existing products typically use a vertical motor to drive the camera's vertical rotation and a horizontal motor to drive it horizontally. Two independent drive and transmission systems are used for each rotation direction. However, pan-tilt units employing these two drive systems are often bulky and expensive. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned problems by providing a driving device for a PTZ camera.

[0005] This invention is implemented according to the following technical solution:

[0006] The driving device for a pan-tilt camera of the present invention connects both the pan-tilt base and the camera, driving the camera to change its working direction. It includes a first driving assembly, a second driving assembly, a driving gear set, a U-shaped frame, and a rotating bracket. The driving gear set includes an internal gear and an external gear coaxially arranged, with the external gear movably sleeved outside the internal gear. The upper end of the internal gear has a first spur gear, and the lower end has a first bevel gear, which rotates synchronously. The upper end of the external gear has a second spur gear, and the lower end has a second bevel gear, which also rotates synchronously. The first driving assembly includes a first motor and a first reduction gear set, with the first motor providing power... The first reduction gear set transmits the power of the first motor to the second spur gear of the external gear, driving the external gear to rotate; the second drive assembly includes a second motor and a second reduction gear set, the second motor provides power, and the second reduction gear set transmits the power of the second motor to the first spur gear of the internal gear, driving the internal gear to rotate; a first vertical bevel gear and a second vertical bevel gear are coaxially arranged inside the U-shaped frame, the first vertical bevel gear and the second vertical bevel gear are fixed relative to each other inside the U-shaped frame, the first vertical bevel gear meshes with the first bevel gear, and the second vertical bevel gear meshes with the second bevel gear; the rotating bracket is movably connected to the U-shaped frame, and the rotating bracket is movably connected to the gimbal base.

[0007] The first reduction gear set includes a first reduction gear, a second reduction gear, and a third reduction gear. The large gear of the first reduction gear meshes with the output gear of the first motor. The first reduction gear, the second reduction gear, and the third reduction gear form a transmission pair. The small gear of the third reduction gear meshes with the second spur gear of the external gear.

[0008] The second reduction gear set includes a fourth reduction gear, a fifth reduction gear, and a sixth reduction gear. The large gear of the fourth reduction gear meshes with the output gear of the second motor. The fourth, fifth, and sixth reduction gears form a transmission pair. The small gear of the sixth reduction gear meshes with the first spur gear of the internal gear.

[0009] The U-shaped frame rotates in a vertical plane relative to the rotating bracket, and the rotating bracket rotates in a horizontal plane relative to the gimbal base.

[0010] The present invention achieves the following beneficial effects.

[0011] The driving device for the pan-tilt camera involved in this invention uses a small motor to increase the output torque through a gear set, and two motors are placed in parallel at the bottom of the bracket through bevel gear transmission. Therefore, compared with the traditional pan-tilt structure, the overall size is greatly reduced and the cost is lowered, making it suitable for mounting small tube cameras. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the horizontal structure of the driving device for the pan-tilt camera of the present invention;

[0013] Figure 2 This is a schematic diagram of the vertical structure of the driving device for the pan-tilt camera of the present invention;

[0014] Figure 3 This is a schematic diagram of the second reduction gear set in the driving device of the pan-tilt camera of the present invention.

[0015] Figure 4 This is a schematic diagram of the structure of the first reduction gear set in the driving device of the pan-tilt camera of the present invention;

[0016] Figure 5 This is a three-dimensional structural schematic diagram of the driving device for the pan-tilt camera of the present invention;

[0017] Figure 6 This is a schematic diagram of the U-shaped frame in the driving device of the pan-tilt camera of the present invention.

[0018] Figure 7 This is a schematic diagram of the external structure of the driving device for the pan-tilt camera of the present invention;

[0019] Figure 8This is an internal cross-sectional view of the driving device of the pan-tilt camera of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 8 As shown, the driving device for the pan-tilt camera of the present invention connects both the pan-tilt base and the camera, driving the camera to change its working direction. It includes a first driving assembly, a second driving assembly, a driving gear set, a U-shaped frame 5, and a rotating bracket 6. The driving gear set includes an internal gear 3 and an external gear 4 coaxially arranged, with the external gear movably sleeved outside the internal gear. The upper end of the internal gear 3 is provided with a first spur gear 3a, and the lower end with a first bevel gear 3b. The first spur gear and the first bevel gear rotate synchronously. The upper end of the external gear 4 is provided with a second spur gear 4a, and the lower end with a second bevel gear 4b. The second spur gear and the second bevel gear rotate synchronously. The first driving assembly includes a first motor 1 and a first reduction gear set 100. The first motor provides power... The first reduction gear set transmits the power of the first motor to the second spur gear 4a of the external gear, driving the external gear to rotate. The second drive assembly includes a second motor 2 and a second reduction gear set 101. The second motor provides power, and the second reduction gear set transmits the power of the second motor to the first spur gear 3a of the internal gear, driving the internal gear to rotate. A first vertical bevel gear 7 and a second vertical bevel gear 8 are coaxially arranged inside the U-shaped frame 5. The first and second vertical bevel gears are relatively fixed inside the U-shaped frame. The first vertical bevel gear 7 meshes with the first bevel gear 3b, and the second vertical bevel gear 8 meshes with the second bevel gear 4b. The rotating bracket 6 is movably connected to the U-shaped frame 5 and the gimbal base 9. The first and second vertical bevel gears drive the U-shaped frame to rotate vertically. Each motor and each gear set constitutes the overall transmission core, which is fixed inside the reduction gearbox body formed by the gimbal base and the gimbal reduction gearbox cover.

[0022] The first reduction gear set 100 includes a first reduction gear 10, a second reduction gear 11 and a third reduction gear 12. The large gear of the first reduction gear meshes with the output gear of the first motor. The first reduction gear, the second reduction gear and the third reduction gear form a transmission pair. The small gear of the third reduction gear meshes with the second spur gear 4a of the external gear.

[0023] The second reduction gear set 101 includes a fourth reduction gear 13, a fifth reduction gear 14 and a sixth reduction gear 15. The large gear of the fourth reduction gear meshes with the output gear of the second motor. The fourth reduction gear, the fifth reduction gear and the sixth reduction gear form a transmission pair. The small gear of the sixth reduction gear meshes with the first spur gear 3a of the internal gear.

[0024] The U-shaped bracket 5 rotates in the vertical plane relative to the rotating support 6, and the rotating support 6 rotates in the horizontal plane relative to the pan-tilt base 9, thereby driving the camera to rotate in various angles.

[0025] When the first motor and the second motor move in the same direction at the same speed, the first reduction gear set and the second reduction gear set drive the second vertical bevel gear and the first vertical bevel gear to rotate in opposite directions, thereby causing the U-shaped frame and the rotating bracket to drive the camera to rotate horizontally; when the first motor and the second motor move in opposite directions at the same speed, the first reduction gear set and the second reduction gear set drive the second vertical bevel gear and the first vertical bevel gear to rotate in the same direction, thereby causing the U-shaped frame to drive the camera to move vertically.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A driving device for a pan-tilt camera, connecting both a pan-tilt base and the camera, driving the camera to change its working direction, characterized in that, The system includes a first drive assembly, a second drive assembly, a drive gear set, a U-shaped frame, and a rotating support. The drive gear set includes an internal gear and an external gear arranged coaxially. The external gear is movably sleeved outside the internal gear. A first spur gear is located at the upper end of the internal gear, and a first bevel gear is located at the lower end. The first spur gear and the first bevel gear rotate synchronously. A second spur gear is located at the upper end of the external gear, and a second bevel gear is located at the lower end. The second spur gear and the second bevel gear rotate synchronously. The first drive assembly includes a first motor and a first reduction gear set. The first motor provides power, and the first reduction gear set transmits the power from the first motor to... The second spur gear of the external gear drives the external gear to rotate; the second drive assembly includes a second motor and a second reduction gear set, the second motor provides power, and the second reduction gear set transmits the power of the second motor to the first spur gear of the internal gear, driving the internal gear to rotate; a first vertical bevel gear and a second vertical bevel gear are coaxially arranged inside the U-shaped frame, the first vertical bevel gear and the second vertical bevel gear are fixed relative to each other inside the U-shaped frame, the first vertical bevel gear meshes with the first bevel gear, and the second vertical bevel gear meshes with the second bevel gear; the rotating bracket is movably connected to the U-shaped frame, and the rotating bracket is movably connected to the gimbal base; When the first motor and the second motor move in the same direction at the same speed, the first reduction gear set and the second reduction gear set drive the second vertical bevel gear and the first vertical bevel gear to rotate in opposite directions, thereby causing the U-shaped frame and the rotating bracket to drive the camera to rotate horizontally; when the first motor and the second motor move in opposite directions at the same speed, the first reduction gear set and the second reduction gear set drive the second vertical bevel gear and the first vertical bevel gear to rotate in the same direction, thereby causing the U-shaped frame to drive the camera to move vertically.

2. The driving device for a PTZ camera as described in claim 1, characterized in that, The first reduction gear set includes a first reduction gear, a second reduction gear, and a third reduction gear. The large gear of the first reduction gear meshes with the output gear of the first motor. The first reduction gear, the second reduction gear, and the third reduction gear form a transmission pair. The small gear of the third reduction gear meshes with the second spur gear of the external gear.

3. The driving device for a PTZ camera as described in claim 2, characterized in that, The second reduction gear set includes a fourth reduction gear, a fifth reduction gear, and a sixth reduction gear. The large gear of the fourth reduction gear meshes with the output gear of the second motor. The fourth, fifth, and sixth reduction gears form a transmission pair. The small gear of the sixth reduction gear meshes with the first spur gear of the internal gear.

4. The driving device for a PTZ camera as described in claim 3, characterized in that, The U-shaped frame rotates in the vertical plane relative to the rotating bracket, and the rotating bracket rotates in the horizontal plane relative to the gimbal base.

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