Telescopic rocker arm support with gravity balance adjustment function for film shooting

Abstract

The invention relates to the technical field of camera shooting equipment, and provides a telescopic rocker arm support with gravity balance adjustment for film shooting, the telescopic rocker arm support comprises a base, a main arm and a telescopic arm, the main arm is provided with a rotating shaft I, the base is provided with a supporting column, a rotating joint is arranged between the supporting column and the main arm, and the rotating shaft I is provided with a rotating shaft II; the rotating joint is rotationally connected with the first rotating shaft and the supporting column of the main arm, and the rotating joint is provided with a first damping mechanism and a second damping mechanism on the first rotating shaft and in the supporting column respectively; the damping mechanism I and the damping mechanism II can synchronously adjust the damping of the rotating joint according to the wind power and the extension amount of the telescopic arm through the adjusting mechanism, so that an operator can still stably control the rotation of the rotating joint in the vertical direction and the horizontal direction under the outdoor strong wind condition; the heights of the universal wheels at the four corners of the square bottom frame are adjusted through the stabilizing mechanism, so that the base is kept horizontal, and the stability of the base and the force dispersion effect are improved through the balance weight mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of camera devices, and more specifically, to a telescopic jib arm bracket for film shooting with gravity balance adjustment. Background Art

[0002] In film shooting, the telescopic jib arm bracket is the core device for achieving complex camera movements and is particularly indispensable in long-shot, high-altitude shooting, and dynamic tracking scenarios. Traditional jib arm brackets often face the following problems: The weight distribution of the lens, camera, and accessories is uneven, resulting in the need for additional force to adjust the balance during operation, which affects shooting stability; Manual balance adjustment takes a long time and is difficult to adapt to rapidly changing shooting requirements, and imbalance may cause equipment damage or personal injury; Most existing telescopic jib arm brackets detect the arm length and load weight through sensors and drive the counterweight to move or adjust the spring tension by motors to achieve gravity balance adjustment.

[0003] However, when the telescopic jib arm bracket is applied outdoors, the following problems still exist: 1. The telescopic arm is vulnerable to wind interference, resulting in camera shake. Under strong winds, it may get out of control, and the longer the telescopic arm, the larger the force-bearing area, making it more likely to get out of control; 2. When the wind is strong, it is difficult to ensure the stability of the base, which further affects the telescopic arm and the shooting image; 3. On uneven terrain or soft ground: The stability of the base decreases, the center of gravity rises after the long arm is extended, and it is prone to tipping over. In addition, the support base is prone to sinking, resulting in overall imbalance, affecting gravity balance adjustment and shooting image stability.

[0004] Therefore, the present invention provides a telescopic jib arm bracket for film shooting with gravity balance adjustment. Summary of the Invention

[0005] The present invention provides a telescopic jib arm bracket for film shooting with gravity balance adjustment, and adjusts the damping of the rotating joint in real time through an adjustment mechanism to solve the problems in the background art.

[0006] The technical solution of the present invention is as follows: A telescopic jib arm bracket for film shooting with gravity balance adjustment, comprising: a base, a main arm, and a telescopic arm. A rotating shaft I is provided on the main arm, a support column is provided on the base, a rotating joint is rotatably installed at the top of the support column, and the rotating joint is rotatably connected to the rotating shaft I. A damping mechanism I and a damping mechanism II are respectively provided on the rotating shaft I of the rotating joint and inside the support column; The damping mechanism 1 includes a shock-absorbing cylinder 1 provided on the rotating joint. The damping mechanism 2 includes a transmission mechanism and a shock-absorbing cylinder 2 arranged vertically. The transmission mechanism is connected to the shock-absorbing cylinder 2, and an adjustment mechanism is provided between the shock-absorbing cylinder 1 and the shock-absorbing cylinder 2; A stabilizing mechanism and a counterweight mechanism are provided on the base.

[0007] Preferably, a wind speed sensor and a displacement sensor are installed at the output end of the telescopic arm.

[0008] Preferably, the damping mechanism 1 includes a turntable provided at the top of the shock-absorbing cylinder 1. The turntable is connected to the rotating shaft 1. Two hollow partitions are symmetrically arranged in the shock-absorbing cylinder 1. A blade is fixedly connected between the two partitions on one side of the turntable. Throttle holes 1 are provided on both sides of the partition. A connecting pipe 1 is provided between the throttle holes 1 on both sides of the partition. A push rod is slidably connected to the bottom of the shock-absorbing cylinder 1. One end of the push rod is located inside the partition and is provided with a plurality of extrusion rods. The plurality of extrusion rods correspond to the plurality of connecting pipes 1. The other end of the push rod is threadedly connected with a threaded rod 1 outside the bottom of the shock-absorbing cylinder 1, and one end of the threaded rod 1 is rotatably connected to the shock-absorbing cylinder 1.

[0009] Preferably, the transmission mechanism includes a bevel gear 1 connected to the rotating joint. A rotating shaft 2 is rotatably connected inside the shock-absorbing cylinder 2. A bevel gear 2 and a disc are respectively fixedly connected to both ends of the rotating shaft 2, and the bevel gear 2 meshes with the bevel gear 1. A connecting pin is provided on one side of the disc. A connecting rod is rotatably connected to the outside of the connecting pin. A sliding rod is slidably connected inside the shock-absorbing cylinder 2. The other end of the connecting rod is rotatably connected to the sliding rod.

[0010] Preferably, a piston 1, a piston rod, and a throttle plate are provided inside the shock-absorbing cylinder 2. The piston rod is fixedly connected to the piston 1, and one end of the piston rod extends out of the shock-absorbing cylinder 2 and is fixedly connected to the sliding rod. The throttle plate is located between the piston 1 and the bottom of the shock-absorbing cylinder 2. Piston 2s are provided on both sides. The throttle plate is hollow, and throttle holes 2 are provided on both sides of the throttle plate. A connecting pipe 2 is provided between the throttle holes 2 on both sides of the throttle plate. A plurality of push frames are slidably connected inside the throttle plate. The plurality of push frames all correspond to the plurality of connecting pipes 2. A rotating wheel is rotatably connected to the center of the throttle plate, and the edge of the rotating wheel is an arc surface. A limiting strip is provided on the arc surface of the rotating wheel, and the limiting strip is slidably connected to the push frame. An expansion rod is provided between the throttle plate and the bottom of the shock-absorbing cylinder 2, and one end of the expansion rod is fixedly connected to the rotating wheel.

[0011] Preferably, the adjusting mechanism includes a rotating frame rotatably connected to the outside of the support column. The rotating frame is fixedly connected to the first shock-absorbing cylinder. A third rotating shaft is rotatably connected inside the rotating frame. A first gear and a second gear are fixedly connected to both ends of the third rotating shaft respectively. A third gear is fixedly connected to one end of the first threaded rod. A first synchronous belt is installed between the third gear and the second gear. A limiting ring is slidably connected to the inner side of the rotating frame. A first rack is fixedly connected to the limiting ring. The first rack meshes with the first gear.

[0012] Preferably, the adjusting mechanism further includes a mounting frame fixedly connected to the outside of the support column. A fourth rotating shaft is rotatably connected inside the mounting frame. A fourth gear and a fifth gear are fixedly connected to both ends of the fourth rotating shaft respectively. A sixth gear connected to the telescopic rod is rotatably connected to the bottom of the second shock-absorbing cylinder. A second synchronous belt is installed between the sixth gear and the fourth gear. A second rack is slidably connected inside the mounting frame. The second rack meshes with the fifth gear. And a first spring is installed between the second rack and the mounting frame.

[0013] Preferably, the outer side of the limiting ring is attached to the second rack. A threaded cylinder is rotatably connected to the support column. A connecting rod is threadedly connected inside the threaded cylinder. One end of the connecting rod is slidably connected to the outer side of the limiting ring. A stepping motor for driving the threaded cylinder to rotate is installed on the support column.

[0014] Preferably, the base includes a square base frame. The stabilizing mechanism includes universal wheels installed at the bottoms of the four ends of the square base frame. Slide cylinders are slidably connected to the four ends of the square base frame. The universal wheels are fixedly connected to the slide cylinders. A second threaded rod is rotatably connected to the four ends of the square base frame. One end of the second threaded rod is located inside the slide cylinder and is threadedly connected to the slide cylinder. A motor for driving the second threaded rod to rotate is installed on the square base frame. A force-dispersing column is arranged between the support column and the square base frame.

[0015] Preferably, four support plates are crosswise arranged in the middle of the square base frame. The weight balancing mechanism includes a plurality of symmetrically arranged support rods. Empty slots are formed on one side of the support plates close to the support rods. Both ends of the support rods are slidably connected in the empty slots of the two side support rods. And a second spring is installed between the empty slots and the support rods. A weight box is arranged in the middle of the support rods. Weight blocks are arranged inside the weight box.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. By means of the adjusting mechanism, the present invention enables the first damping mechanism and the second damping mechanism to synchronously adjust the damping of the rotating joint according to the wind force and the elongation of the telescopic arm, so that the operator can still stably control the rotation of the rotating joint in the vertical and horizontal directions under strong outdoor winds.

[0017] 2. The present invention drives the second threaded rod to rotate by starting the motor. Since the sliding cylinder is threadedly connected to the second threaded rod and slidably connected to the square base frame, the rotation of the second threaded rod can drive the sliding cylinder to move, thereby driving the universal wheel to move up and down. By adjusting the height of the universal wheels at the four corners of the square base frame, the base is kept level, thereby avoiding the influence of the non-level base on the center of gravity of the main arm and the telescopic arm and affecting the shooting effect and the gravity balance adjustment.

[0018] 3. The present invention sets multiple counterweight boxes, so that the counterweight boxes have a larger contact area with the ground, so that there is also a larger contact area on uneven ground, thereby maintaining the stability of the base and avoiding the influence of outdoor wind on the base. At the same time, by increasing the contact area between the base and the ground, the force of the outdoor wind on the main arm and the telescopic arm is transmitted to the ground, increasing the effect of force dispersion and further improving the stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of the telescopic boom support of the present invention; Figure 2 is a perspective view of the connection structure of the rotating joint of the present invention; Figure 3 is a sectional perspective view of the first damping mechanism of the present invention; Figure 4 is a sectional schematic view of the second damping mechanism of the present invention; Figure 5 is a sectional perspective view of the second damping mechanism of the present invention; Figure 6 is a sectional perspective view of the structure on the throttle plate of the present invention; Figure 7 is a sectional schematic view of the adjustment mechanism of the present invention; Figure 8 is a perspective view of the base of the present invention; Figure 9 is the present invention Figure 8 partial enlarged view of A in

[0020] In the figure: 1. Base; 11. Square base frame; 12. Support plate; 2. Main arm; 21. First rotating shaft; 3. Telescopic arm; 31. Wind speed sensor; 32. Displacement sensor; 4. Support column; 5. Rotating joint; 6. First damping mechanism; 61. First shock absorber cylinder; 62. Turntable; 63. Partition plate; 64. Blade; 65. First throttle hole; 66. First connecting pipe; 67. Push rod; 68. Extrusion rod; 69. First threaded rod; 7. Second damping mechanism; 71. Second shock absorber cylinder; 72. Transmission mechanism; 721. First bevel gear; 722. Second rotating shaft; 723. Second bevel gear; 724. Disc; 725. Connecting pin; 726. Connecting rod; 727. Slide bar; 73. First piston; 74. Piston rod; 75. Throttle plate; 76. Second piston; 77. Second throttle hole; 78. Second connecting pipe; 79. Push frame; 710. Rotating wheel; 711. Limiting strip; 712. Telescopic rod; 8. Adjusting mechanism; 81. Rotating frame; 82. Third rotating shaft; 83. First gear; 84. Second gear; 85. Third gear; 86. First synchronous belt; 87. Limiting ring; 88. First rack; 89. Mounting frame; 810. Fourth rotating shaft; 811. Fourth gear; 812. Fifth gear; 813. Sixth gear; 814. Second synchronous belt; 815. Second rack; 816. First spring; 817. Threaded cylinder; 818. Connecting rod; 819. Stepper motor; 9. Stabilizing mechanism; 91. Universal wheel; 92. Slide cylinder; 93. Second threaded rod; 94. Motor; 95. Force-dispersing column; 10. Counterweight mechanism; 101. Support rod; 102. Empty slot; 103. Second spring; 104. Counterweight box; 105. Counterweight block. Detailed implementation mode

[0021] The following further describes the implementation mode of the present invention in detail with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention. Embodiment 1:

[0022] As Figures 1 - 9 shown, the present invention provides a telescopic jib bracket for film shooting with gravity balance adjustment, including: a base 1, a main arm 2, and a telescopic arm 3. Among them, a first rotating shaft 21 is provided on the main arm 2, a support column 4 is provided on the base 1, a rotating joint 5 is rotatably installed at the top of the support column 4, and the rotating joint 5 is rotatably connected to the first rotating shaft 21. A first damping mechanism 6 and a second damping mechanism 7 are respectively provided on the rotating joint 5 on the first rotating shaft 21 and inside the support column 4; The first damping mechanism 6 includes a first shock absorber cylinder 61 provided on the rotating joint 5. The second damping mechanism 7 includes a transmission mechanism 72 and a second shock absorber cylinder 71 arranged up and down. The transmission mechanism 72 is connected to the second shock absorber cylinder 71, and an adjusting mechanism 8 is provided between the first shock absorber cylinder 61 and the second shock absorber cylinder 71; A stabilizing mechanism 9 and a counterweight mechanism 10 are provided on the base 1.

[0023] A wind speed sensor 31 and a displacement sensor 32 are installed at the output end of the telescopic arm 3.

[0024] As Figures 1 - 2 shown, since the rotating joint 5 is rotatably connected to the rotating shaft 21 of the main arm 2 and the support column 4, the telescopic boom support main arm 2 can rotate in the vertical and horizontal directions through the rotating joint 5, so as to shoot pictures at different angles. At the same time, the rotation of the main arm 2 is restricted by the damping mechanism I 6 and the damping mechanism II 7, enabling the operator to operate the main arm 2 smoothly and increasing stability. The wind speed sensor 31 and the displacement sensor 32 at the output end of the telescopic arm 3 continuously monitor the wind speed and the elongation of the telescopic arm 3, and transmit the monitoring data to the adjusting mechanism 8. The adjusting mechanism 8 controls the damping mechanism I 6 and the damping mechanism II 7 to adjust the damping of the rotating joint 5 in real time, thereby preventing the telescopic arm 3 from getting out of control due to an increase in wind speed.

[0025] At the same time, a stabilizing mechanism 9 and a counterweight mechanism 10 are provided on the base 1. A certain counterweight is added when installing the telescopic boom support to prevent the base 1 from being difficult to ensure stability when the wind force is large, and at the same time, the levelness of the base 1 is adjusted to further increase the shooting stability.

[0026] As Figure 3 shown, the damping mechanism I 6 includes a turntable 62 provided at the top of the shock-absorbing cylinder I 61. The turntable 62 is connected to the rotating shaft 21. Two hollow partitions 63 are symmetrically arranged in the shock-absorbing cylinder I 61. A blade 64 is fixedly connected between the two partitions 63 on one side of the turntable 62. Throttle holes I 65 are formed on both sides of the partition 63. A connecting pipe I 66 is provided between the throttle holes I 65 on both sides of the partition 63. A push rod 67 is slidably connected to the bottom of the shock-absorbing cylinder I 61. One end of the push rod 67 is located inside the partition 63 and is provided with a plurality of extrusion rods 68. The plurality of extrusion rods 68 correspond to the plurality of connecting pipes I 66. The other end of the push rod 67 is threadedly connected with a threaded rod I 69 outside the bottom of the shock-absorbing cylinder I 61. One end of the threaded rod I 69 is rotatably connected to the shock-absorbing cylinder I 61.

[0027] The shock-absorbing cylinder I 61 is filled with hydraulic oil. When the main arm 2 rotates in the vertical direction, the rotating shaft 21 on the main arm 2 drives the blade 64 to rotate through the turntable 62. When the blade 64 rotates, the hydraulic oil is squeezed and enters the space between the adjacent blades 64 and the partition 63 through the throttle holes I 65 on the partition 63 and the connecting pipe I 66. Thus, through the viscosity characteristics of the hydraulic oil and the viscous resistance generated when passing through the throttle holes I 65, the rotation speed of the blade 64 is reduced, thereby providing a certain damping to the rotating shaft 21 and preventing the main arm 2 and the telescopic arm 3 from being blown by the outdoor wind, resulting in imbalance and affecting the shooting picture.

[0028] It should be noted that when the blade 64 rotates in the reverse direction, the other blade 64 squeezes the hydraulic oil back to its original position, thus always ensuring the stable effect of the damping mechanism 6.

[0029] Moreover, the magnitude of the damping is proportional to the moving speed of the blade 64. The faster the blade 64 and the rotating shaft 21 move, the greater the resistance generated. When the wind force suddenly increases, the damping mechanism 6 can provide a large resistance to prevent the main boom 2 and the telescopic boom 3 from undergoing large offsets, and absorb the vibrations generated by sudden rotation through the hydraulic oil, thereby further improving the stability of the main boom 2 and the telescopic boom 3 under the influence of outdoor wind.

[0030] In addition, the two partition plates 63 are symmetrically arranged, enabling the blade 64 to rotate only between the two partition plates 63, thereby restricting the rotation angle of the rotating shaft 21, and further restricting the rotation angle of the telescopic boom 3 in the vertical direction, avoiding the camera at the output end of the telescopic boom 3 from contacting the ground and being damaged when there is no operation or the gravity balance system is unstable.

[0031] As Figure 3 shown, since the threaded rod 69 is threadedly connected to the push rod 67, and the push rod 67 is slidably connected to the shock-absorbing cylinder 61, rotating the threaded rod 69 can drive the push rod 67 to move, causing the pressing rod 68 on the push rod 67 to press the communicating pipe 66. One half of the communicating pipe 66 close to the pressing rod 68 is made of rubber, and the half away from the pressing rod 68 is made of metal. When the pressing rod 68 presses the communicating pipe 66, the rubber side is compressed, thereby reducing the communicating space of the communicating pipe 66, further reducing the amount of hydraulic oil flowing through the communicating pipe 66, and further increasing the damping of the damping mechanism 6.

[0032] As Figures 4 - 6 shown, the transmission mechanism 72 includes a bevel gear 721 connected to the rotating joint 5. A rotating shaft 722 is rotatably connected inside the shock-absorbing cylinder 71. Two ends of the rotating shaft 722 are respectively fixedly connected with a bevel gear 723 and a disc 724, and the bevel gear 723 meshes with the bevel gear 721. A connecting pin 725 is arranged on one side of the disc 724. A connecting rod 726 is rotatably connected to the outside of the connecting pin 725. A sliding rod 727 is slidably connected inside the shock-absorbing cylinder 71. The other end of the connecting rod 726 is rotatably connected to the sliding rod 727.

[0033] Inside the shock absorber cylinder II 71, there is a piston I 73, a piston rod 74, and a throttle plate 75. The piston rod 74 is fixedly connected to the piston I 73, and one end of the piston rod 74 extends out of the shock absorber cylinder II 71 and is fixed to the slide bar 727. The throttle plate 75 is located between the piston I 73 and the bottom of the shock absorber cylinder II 71, and piston II 76 is arranged on both sides. The throttle plate 75 is hollow, and throttle holes II 77 are provided on both sides of the throttle plate 75. A hole corresponding to the throttle hole II 77 is provided on the piston II 76. A connecting pipe II 78 is arranged between the throttle holes II 77 on both sides of the throttle plate 75. A plurality of push frames 79 are slidably connected inside the throttle plate 75, and the plurality of push frames 79 correspond to the plurality of connecting pipes II 78. A runner 710 is rotatably connected to the center of the throttle plate 75, and the edge of the runner 710 is an arc surface. A limiting strip 711 is arranged on the arc surface of the runner 710, and the limiting strip 711 is slidably connected to the push frame 79. An expansion link 712 is arranged between the throttle plate 75 and the bottom of the shock absorber cylinder II 71, and one end of the expansion link 712 is fixed to the runner 710.

[0034] When operating the main arm 2 to rotate in the horizontal direction, the main arm 2 drives the rotating joint 5 to rotate, thereby driving the bevel gear I 721 to rotate, and further driving the bevel gear II 723 meshing with the bevel gear I 721 to rotate, so that the turntable 62 connected to the bevel gear II 723 through the rotating shaft II 722 rotates. Since both ends of the connecting rod 726 are rotatably connected to the connecting pin 725 and the slide bar 727 on the turntable 62, and the slide bar 727 is slidably connected inside the support column 4, when the turntable 62 rotates upward, the connecting pin 725 drives the slide bar 727 to move upward. When the turntable 62 rotates downward, the connecting pin 725 drives the slide bar 727 to move downward, so that the slide bar 727 reciprocates in the vertical direction. The slide bar 727 drives the piston I 73 to move up and down through the piston rod 74. The shock absorber cylinder II 71 is filled with hydraulic oil. During the downward movement of the piston I 73, the piston I 73 squeezes the hydraulic oil, so that the hydraulic oil is squeezed into the space between the throttle plate 75 and the bottom of the shock absorber cylinder II 71 through the throttle hole II 77. During the upward movement of the piston I 73, the hydraulic oil between the throttle plate 75 and the bottom of the shock absorber cylinder II 71 is pressed into the space between the throttle plate 75 and the piston I 73 under the action of suction and the resistance of the throttle plate 75, so as to continuously provide damping. By the viscosity characteristics of the hydraulic oil and the viscous resistance generated when passing through the throttle hole II 77, the moving speed of the piston I 73 is reduced, so as to provide a certain damping to the rotating joint 5 through the turntable 62, the bevel gear II 723, and the bevel gear I 721, preventing the main arm 2 and the telescopic arm 3 from being unbalanced under the influence of outdoor wind when rotating in the horizontal direction and affecting the shooting picture.

[0035] Moreover, the magnitude of the damping is proportional to the moving speed of piston 1-73. The faster the speed of piston 1-73, the greater the resistance generated. When the wind force suddenly increases, the damping mechanism 2-7 can provide a greater resistance to prevent large offsets of the main boom 2 and the telescopic boom 3, and absorb the vibrations generated by sudden rotation through hydraulic oil, thereby further improving the stability of the main boom 2 and the telescopic boom 3 under the influence of outdoor wind.

[0036] Moreover, the rotation of the rotating joint 5 is converted into the movement of piston 1-73 through the transmission mechanism 72, enabling the rotating joint 5 to achieve 360° rotation for omnidirectional shooting.

[0037] As Figure 5 、 Figure 6 shown, since the telescopic rod 712 is connected to the rotating wheel 710, rotating the telescopic rod 712 can drive the rotating wheel 710 to rotate, so that the limiting strip 711 on the arc surface of the rotating wheel 710 moves within the push frame 79, and further causes the push frame 79 to move under the push of the limiting strip 711, making the push frame 79 squeeze the connecting pipe 2-78. The half surface of the connecting pipe 2-78 close to the extrusion rod 68 is made of rubber, and the half surface away from the extrusion rod 68 is made of metal. When the push frame 79 squeezes the connecting pipe 1-66, the rubber surface is compressed, thereby reducing the communication space of the connecting pipe 2-78, further reducing the amount of hydraulic oil flowing through the connecting pipe 2-78, and further increasing the damping of the damping mechanism 2-7.

[0038] As Figure 7 shown, the adjusting mechanism 8 includes a rotating frame 81 rotatably connected to the outside of the support column 4. The rotating frame 81 is fixedly connected to the shock absorption cylinder 1-61. A rotating shaft 3-82 is rotatably connected inside the rotating frame 81. A gear 1-83 and a gear 2-84 are respectively fixedly connected to both ends of the rotating shaft 3-82. One end of the threaded rod 1-69 is fixedly connected to a gear 3-85. A synchronous belt 1-86 is installed between the gear 3-85 and the gear 2-84. A limiting ring 87 is slidably connected to the inner side of the rotating frame 81. A rack 1-88 is fixedly connected to the limiting ring 87. The rack 1-88 meshes with the gear 1-83.

[0039] The adjusting mechanism 8 further includes a mounting frame 89 fixedly connected to the outside of the support column 4. A rotating shaft 4-810 is rotatably connected inside the mounting frame 89. A gear 4-811 and a gear 5-812 are respectively fixedly connected to both ends of the rotating shaft 4-810. The bottom of the shock absorption cylinder 2-71 is rotatably connected to a gear 6-813 connected to the telescopic rod 712. A synchronous belt 2-814 is installed between the gear 6-813 and the gear 4-811. A rack 2-815 is slidably connected to the inside of the mounting frame 89. The rack 2-815 meshes with the gear 5-812, and a spring 1-816 is installed between the rack 2-815 and the mounting frame 89.

[0040] The outer side of the limiting ring 87 is in contact with the second rack 815. A threaded barrel 817 is rotatably connected to the support column 4. An adjusting rod 818 is connected to the threaded barrel 817 by internal threads. One end of the adjusting rod 818 is slidably connected to the outer side of the limiting ring 87. A stepper motor 819 for driving the threaded barrel 817 to rotate is installed on the support column 4.

[0041] As Figure 7 shown, the monitoring data of the wind speed sensor 31 and the displacement sensor 32 are transmitted to the stepper motor 819. Since the longer the telescopic arm 3 is, the greater the influence of the wind force, and the greater the wind force, the greater the influence on the stability of the rotating joint 5. Therefore, when the telescopic arm 3 extends and the wind force increases, the adjusting mechanism 8 is controlled by the stepper motor 819 to reduce the flow channels of the first flow pipe 66 and the second flow pipe 78 of the first damping mechanism 6 and the second damping mechanism 7, so as to synchronously increase the damping of the first damping mechanism 6 and the second damping mechanism 7, preventing the operator from hardly synchronously controlling the rotation of the rotating joint 5 in the vertical and horizontal directions under the influence of strong wind. The specific control process is as follows: The stepper motor 819 drives the threaded barrel 817 to rotate. Since the adjusting rod 818 is connected to the threaded barrel 817 by internal threads and the adjusting rod 818 is slidably connected inside the limiting ring 87, the rotation of the threaded barrel 817 can drive the adjusting rod 818 to move, thereby driving the limiting ring 87 to move, so that the first rack 88 on the limiting ring 87 drives the first gear 83 to rotate, and drives the first threaded rod 69 to rotate through the third rotating shaft 82, the second gear 84, the first synchronous belt 86 and the third gear 85, and further enables the pressing rod 68 to press the first communicating pipe 66, increasing the damping of the first damping mechanism 6; at the same time, the second rack 815 is in contact with one end of the limiting ring 87 by the elastic force of the first spring 816, and the contacting surface is an inclined surface. When the limiting ring 87 moves, it pushes the second rack 815 to move, so that the second rack 815 drives the telescopic rod 712 to rotate through the third rotating shaft 82, the fourth gear 811, the second synchronous belt 814 and the sixth gear 813, thereby enabling the pushing frame 79 to press the first communicating pipe 66, increasing the damping of the second damping mechanism 7.

[0042] The first damping mechanism 6 and the second damping mechanism 7 can synchronously adjust the damping of the rotating joint 5 according to the wind force and the elongation of the telescopic arm through the adjusting mechanism, so that the operator can still stably control the rotation of the rotating joint 5 in the vertical and horizontal directions under strong outdoor wind conditions.

[0043] It should be noted that the rotating frame 81 is fixed to the shock-absorbing cylinder 61. When the operator rotates the rotating joint 5, the damping mechanism 6 rotates synchronously with the rotating frame 81. Since the limit ring 87 is slidably connected to the rotating frame 81, when the rotating frame 81 rotates, it can drive the limit ring 87 to rotate synchronously and drive the first rack 88 to rotate synchronously, so that the first rack 88 is always engaged with the first gear 83. Thus, by controlling the up and down movement of the limit ring 87, the first rack 88 can drive the first gear 83 to rotate. And even if the limit ring 87 rotates, it can still push the second rack 815 to move, without affecting the normal rotation of the rotating joint 5.

[0044] As Figure 8 、 Figure 9 shown, the base 1 includes a square base frame 11. The stabilizing mechanism 9 includes universal wheels 91 installed at the bottoms of the four ends of the square base frame 11. The four ends of the square base frame 11 are slidably connected with sliding cylinders 92. The universal wheels 91 are fixedly connected with the sliding cylinders 92. The four ends of the square base frame 11 are rotatably connected with second threaded rods 93. One end of the second threaded rod 93 is located inside the sliding cylinder 92 and is threadedly connected with the sliding cylinder 92. A motor 94 for driving the second threaded rod 93 to rotate is installed on the square base frame 11. A force-dispersing column 95 is arranged between the support column 4 and the square base frame 11.

[0045] Four support plates 12 are cross-arranged in the middle of the square base frame 11. The weight mechanism 10 includes a plurality of symmetrically arranged support rods 101. Empty slots 102 are formed on one side of the support plate 12 close to the support rod 101. Both ends of the support rod 101 are slidably connected in the empty slots 102 of the support rods 101 on both sides. And a second spring 103 is installed between the empty slot 102 and the support rod 101. A weight box 104 is arranged in the middle of the support rod 101. Weight blocks 105 are arranged in the weight box 104.

[0046] When the wind force is large, the weight blocks 105 are placed in the weight box 104. The weight box 104 is pressed to make the support rod 101 press the second spring 103 in the empty slot 102 and fit with the ground. By arranging a plurality of weight boxes 104, the weight boxes 104 have a larger contact area with the ground, so that there can also be a larger contact area on uneven ground, thereby maintaining the stability of the base 1 and avoiding the influence of outdoor wind on the base 1. At the same time, by increasing the contact area between the base 1 and the ground, the force of the outdoor wind on the main arm 2 and the telescopic arm 3 is transmitted to the ground, increasing the force dispersion effect and further improving the stability.

[0047] Moreover, the force received by the first damping mechanism 6 is transmitted to the second damping mechanism 7 through the rotating joint 5. The force received by the second damping mechanism 7 is further dispersed to the ground through the support column 4, the force-dispersing column 95, and the base 1, thereby further improving the stability of the telescopic swing arm bracket.

[0048] Meanwhile, start the motor 94 to drive the second threaded rod 93 to rotate. Since the sliding cylinder 92 is threadedly connected to the second threaded rod 93 and slidably connected to the square base frame 11, the rotation of the second threaded rod 93 can drive the sliding cylinder 92 to move, thereby driving the universal wheel 91 to move up and down. By adjusting the height of the universal wheels 91 at the four corners of the square base frame 11, the base 1 is kept horizontal, thereby preventing the non-levelness of the base 1 from affecting the center of gravity of the main arm 2 and the telescopic arm 3 and affecting the shooting effect and the gravity balance adjustment.

[0049] The embodiments of the present invention are given for purposes of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A telescopic jib bracket for film shooting with gravity balance adjustment, comprising: A base (1), a main arm (2) and a telescopic arm (3), characterized in that: a first rotating shaft (21) is provided on the main arm (2), a support column (4) is provided on the base (1), a rotating joint (5) is rotatably installed at the top of the support column (4), and the rotating joint (5) is rotatably connected to the first rotating shaft (21). A first damping mechanism (6) and a second damping mechanism (7) are respectively provided on the first rotating shaft (21) and inside the support column (4) of the rotating joint (5); The first damping mechanism (6) includes a first shock-absorbing cylinder (61) provided on the rotating joint (5). The second damping mechanism (7) includes a transmission mechanism (72) and a second shock-absorbing cylinder (71) arranged up and down. The transmission mechanism (72) is connected to the second shock-absorbing cylinder (71), and an adjustment mechanism (8) is provided between the first shock-absorbing cylinder (61) and the second shock-absorbing cylinder (71); A stabilizing mechanism (9) and a counterweight mechanism (10) are provided on the base (1).

2. The telescopic boom support for film shooting with gravity balance adjustment according to claim 1, wherein: A wind speed sensor (31) and a displacement sensor (32) are installed at the output end of the telescopic arm (3).

3. The telescopic jib bracket for film shooting with gravity balance adjustment as described in claim 1, wherein: The first damping mechanism (6) includes a turntable (62) provided at the top of the first shock-absorbing cylinder (61). The turntable (62) is connected to the first rotating shaft (21). Two hollow partitions (63) are symmetrically provided inside the first shock-absorbing cylinder (61). A blade (64) is fixedly connected between the two partitions (63) on one side of the turntable (62). Throttle holes one (65) are provided on both sides of the partition (63). A first connecting pipe (66) is provided between the throttle holes one (65) on both sides of the partition (63). A push rod (67) is slidably connected to the bottom of the first shock-absorbing cylinder (61). One end of the push rod (67) is located inside the partition (63) and is provided with a plurality of extrusion rods (68). The plurality of extrusion rods (68) correspond to the plurality of first connecting pipes (66). The other end of the push rod (67) is threadedly connected with a first threaded rod (69) outside the bottom of the first shock-absorbing cylinder (61). One end of the first threaded rod (69) is rotatably connected to the first shock-absorbing cylinder (61).

4. The telescopic jib support for film shooting with gravity balance adjustment as described in claim 3, wherein: The transmission mechanism (72) includes a first bevel gear (721) connected to the rotating joint (5). A second rotating shaft (722) is rotatably connected inside the second shock-absorbing cylinder (71). Two bevel gears two (723) and a disc (724) are respectively fixedly connected to both ends of the second rotating shaft (722). The bevel gear two (723) is meshed with the bevel gear one (721). A connecting pin (725) is provided on one side of the disc (724). A connecting rod (726) is rotatably connected to the outside of the connecting pin (725). A sliding rod (727) is slidably connected inside the second shock-absorbing cylinder (71). The other end of the connecting rod (726) is rotatably connected to the sliding rod (727).

5. The telescopic jib bracket for film shooting with gravity balance adjustment according to claim 4, characterized in that: Inside the shock absorber cylinder two (71), there is a piston one (73), a piston rod (74), and a throttle plate (75). The piston rod (74) is fixedly connected to the piston one (73), and one end of the piston rod (74) extends out of the shock absorber cylinder two (71) and is fixedly connected to the slide rod (727). The throttle plate (75) is located between the piston one (73) and the bottom of the shock absorber cylinder two (71), and piston two (76) is arranged on both sides. The throttle plate (75) is hollow, and throttle holes two (77) are formed on both sides of the throttle plate (75). A connecting pipe two (78) is arranged between the throttle holes two (77) on both sides of the throttle plate (75). A plurality of push frames (79) are slidably connected inside the throttle plate (75), and the plurality of push frames (79) correspond to the plurality of connecting pipes two (78). A runner (710) is rotatably connected to the center of the throttle plate (75), and the edge of the runner (710) is an arc surface. A limiting strip (711) is arranged on the arc surface of the runner (710), and the limiting strip (711) is slidably connected to the push frame (79). An expansion link (712) is arranged between the throttle plate (75) and the bottom of the shock absorber cylinder two (71), and one end of the expansion link (712) is fixedly connected to the runner (710).

6. The telescopic jib support for film shooting with gravity balance adjustment as claimed in claim 5, wherein: The adjusting mechanism (8) includes a rotating frame (81) rotatably connected to the outside of the support column (4). The rotating frame (81) is fixedly connected to the shock absorber cylinder one (61). A rotating shaft three (82) is rotatably connected inside the rotating frame (81). A gear one (83) and a gear two (84) are respectively fixedly connected to both ends of the rotating shaft three (82). A gear three (85) is fixedly connected to one end of the threaded rod one (69). A synchronous belt one (86) is installed between the gear three (85) and the gear two (84). A limiting ring (87) is slidably connected to the inside of the rotating frame (81). A rack one (88) is fixedly connected to the limiting ring (87), and the rack one (88) meshes with the gear one (83).

7. The telescopic jib arm bracket for film shooting with gravity balance adjustment according to claim 6, characterized in that: The adjusting mechanism (8) further includes a mounting frame (89) fixedly connected to the outside of the support column (4). A rotating shaft four (810) is rotatably connected inside the mounting frame (89). A gear four (811) and a gear five (812) are respectively fixedly connected to both ends of the rotating shaft four (810). A gear six (813) connected to the expansion link (712) is rotatably connected to the bottom of the shock absorber cylinder two (71). A synchronous belt two (814) is installed between the gear six (813) and the gear four (811). A rack two (815) is slidably connected to the inside of the mounting frame (89). The rack two (815) meshes with the gear five (812), and a spring one (816) is installed between the rack two (815) and the mounting frame (89).

8. The telescopic jib arm bracket for film shooting with gravity balance adjustment according to claim 7, wherein: The outer side of the limiting ring (87) is in contact with the second rack (815). A threaded cylinder (817) is rotatably connected to the support column (4). A connecting rod (818) is connected to the threaded cylinder (817) by internal threads. One end of the connecting rod (818) is slidably connected to the outer side of the limiting ring (87). A stepping motor (819) for driving the rotation of the threaded cylinder (817) is installed on the support column (4).

9. The telescopic jib support for film shooting with gravity balance adjustment as claimed in claim 1, characterized in that: The base (1) includes a square base frame (11). The stabilizing mechanism (9) includes universal wheels (91) installed at the bottoms of the four ends of the square base frame (11). Slide cylinders (92) are slidably connected to the four ends of the square base frame (11). The universal wheels (91) are fixedly connected to the slide cylinders (92). A second threaded rod (93) is rotatably connected to the four ends of the square base frame (11). One end of the second threaded rod (93) is located inside the slide cylinder (92) and is threadedly connected to the slide cylinder (92). A motor (94) for driving the rotation of the second threaded rod (93) is installed on the square base frame (11). A force-dispersing column (95) is provided between the support column (4) and the square base frame (11).

10. The telescopic jib bracket for film shooting with gravity balance adjustment according to claim 9, characterized in that: Four support plates (12) are cross-arranged in the middle of the square base frame (11). The weight balancing mechanism (10) includes a plurality of symmetrically arranged support rods (101). Empty slots (102) are formed on one side of the support plates (12) close to the support rods (101). Both ends of the support rods (101) are slidably connected to the empty slots (102) of the support rods (101) on both sides. A second spring (103) is installed between the empty slots (102) and the support rods (101). A weight box (104) is arranged in the middle of the support rods (101). Weight blocks (105) are arranged in the weight box (104).

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