Air pressure holder with taper piston rod

Abstract

The air pressure holder comprises the piston rod, an outer cylinder body and an inner cylinder body, wherein the outer cylinder body and the inner cylinder body are sleeved in a sliding mode. The bottom end of the inner barrel is connected with a piston, so that a closed air pressure cavity is formed in the inner barrel, and a through hole is formed in the piston; the piston rod is arranged in the outer cylinder, the bottom end of the piston rod is fixedly connected with the bottom end of the outer cylinder, the top end of the piston rod penetrates through the through hole and extends into the inner cylinder, and the outer diameter of the piston rod is gradually reduced from top to bottom; a sealing ring is arranged in the through hole, and an air channel communicated to the air pressure cavity is arranged on the periphery of the sealing ring in the piston. The air pressure pan-tilt is provided with the piston rod with the taper, assisting force is gradually increased along with the increase of the downward pressing distance of the pan-tilt, a photographer can operate the air pressure pan-tilt more easily, and the adjusting comfort of the pan-tilt is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a holder technology field especially relates to a taper piston rod pressure holder. BACKGROUND

[0002] The camera equipment is installed on the holder and used, relieve the working strength of the shooting personnel, make the adjustment of height convenient. The holder adopts the air pressure cylinder structure, along with the height reduction of the holder, the air pressure in the air pressure cylinder structure changes, it is more laborious when going down. For this, design a taper piston rod pressure holder, can effectively reduce the intensity when the holder goes down, make the adjustment of the holder more relaxed. CONTENT OF THE UTILITY MODEL

[0003] In view of the above-mentioned defects or insufficient in the prior art, it is expected to provide a taper piston rod pressure holder, provided with a piston rod with taper, along with the height change of the holder, ensure that the bearing capacity in the air pressure cavity does not change, so that the shooting personnel does not increase the working strength when changing the working height of the holder, improve the comfort of the holder adjustment.

[0004] The utility model provides a taper piston rod pressure holder, including piston rod, sliding sleeve joint's outer cylinder and inner cylinder,

[0005] The bottom end of the inner cylinder is sealingly and fixedly connected with a piston, so that a closed air pressure cavity is formed in the inner cylinder, and a through hole is formed in the piston;

[0006] The piston rod is arranged in the outer cylinder, the bottom end of the piston rod is fixedly connected with the bottom end of the outer cylinder, the top end of the piston rod penetrates through the through hole and extends into the inner cylinder, and the outer diameter of the piston rod gradually decreases from top to bottom;

[0007] The inner diameter of the through hole is greater than the maximum outer diameter of the piston rod, a sealing ring is embedded in the through hole and sleeved on the piston rod, and a gas path connected to the air pressure cavity is arranged on the periphery of the piston and located outside the sealing ring.

[0008] Further, an end cover is fixedly arranged at the bottom end of the outer cylinder, and the bottom end of the piston rod is sealingly and fixedly connected with the end cover; an inflation channel is formed in the piston rod in the axial direction of the piston rod, an air inlet channel connected to the inflation channel is formed in one side of the end cover, and an air inlet valve connected with the air inlet channel is fixedly arranged on one side of the end cover; and a one-way air valve is connected to the top end of the inflation channel.

[0009] Further, a supporting assembly is arranged at the top end of the piston rod; the supporting assembly comprises a supporting ring sleeved on the top end of the piston rod, a supporting step is arranged below the top end of the piston rod and located in the supporting ring, a clamping spring is clamped on the piston rod and located above the supporting ring, and a type hole is arranged on the supporting ring and connected above and below the supporting ring.

[0010] Furthermore, a guide assembly is provided at the top of the outer cylinder; the guide assembly includes a plurality of mounting seats evenly distributed around the outer periphery of the outer cylinder, the mounting seats having mounting slots, the outer cylinder having clearance slots corresponding to the mounting slots, and guide wheels being provided in each mounting slot, the guide wheels passing through the clearance slots and abutting against the outer wall of the inner cylinder.

[0011] Furthermore, a support is fixedly connected to the top of the inner cylinder.

[0012] Furthermore, a handrail is provided on the outer periphery of the support, and the handrail is fixedly connected to the support through several connecting rods.

[0013] Furthermore, the support is provided with an exhaust channel that communicates with the inner cavity of the inner cylinder. A threaded hole communicating with the exhaust channel is provided on one side of the support, and an exhaust hole communicating with the threaded hole is provided on the top of the support. An exhaust knob for controlling the exhaust hole is threadedly connected to the threaded hole.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The pneumatic gimbal of this invention is equipped with a tapered piston rod. As the height of the gimbal changes, the length of the piston rod extending into the pneumatic chamber changes, resulting in a change in the pressure within the pneumatic chamber. Due to the tapered design of the piston rod, the area of ​​the piston top surface changes simultaneously, offsetting the change in air pressure. This keeps the pneumatic gimbal and the camera equipment in a supported and balanced state, so changing the working height of the gimbal does not increase the workload and improves the comfort of gimbal adjustment.

[0016] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0017] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 A schematic diagram of a tapered piston rod pneumatic gimbal;

[0019] Figure 2 This is a schematic diagram of the piston rod structure;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of a tapered piston rod pneumatic gimbal.

[0021] Figure 4 A cross-sectional structural diagram of the supporting components;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the support.

[0023] The following are the labels in the diagram: 1. Piston rod; 2. Outer cylinder; 3. Inner cylinder; 4. Piston; 5. Support assembly; 6. Guide assembly; 7. Support; 8. Handrail ring;

[0024] 11. Inflation channel; 12. One-way valve; 13. Support steps;

[0025] 31. Air pressure chamber;

[0026] 21. End cap; 22. Air intake passage; 23. Air intake valve; 24. Clearance groove;

[0027] 41. Through hole; 42. Sealing ring; 43. Air passage;

[0028] 51. Support ring; 52. Snap ring; 53. Hole;

[0029] 61. Mounting base; 62. Mounting through slot; 63. Guide wheel;

[0030] 71. Exhaust passage; 72. Threaded hole; 73. Exhaust port; 74. Exhaust knob;

[0031] 81. Connecting rod. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0033] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Please refer to Figures 1-5 An embodiment of this utility model provides a tapered piston rod pneumatic gimbal, including a piston rod 1, a slidingly sleeved outer cylinder 2 and an inner cylinder 3;

[0035] A piston 4 is sealed and fixedly connected to the bottom end of the inner cylinder 3, so that a closed air pressure chamber 31 is formed inside the inner cylinder 3, and a through hole 41 is provided on the piston.

[0036] The piston rod 1 is located inside the outer cylinder 2, with its bottom end fixedly connected to the bottom end of the outer cylinder 2, and its top end extending into the inner cylinder 3 through the through hole 41. Its outer diameter gradually decreases from top to bottom.

[0037] The inner diameter of the through hole 41 is larger than the maximum outer diameter of the piston rod 1; a sealing ring 42 fitted on the piston rod 1 is embedded in the through hole 41, and an air passage 43 connected to the air pressure chamber 31 is provided in the piston 4 around the sealing ring 42.

[0038] In this embodiment, the air pressure in the air pressure chamber 31 acts on the piston rod 1. When the piston rod 1 extends into the air pressure chamber 31 to a certain depth, it reaches a state of equilibrium. The reaction force of the piston rod 1 provides support for the camera device, achieving a support balance.

[0039] When the pneumatic gimbal is raised, the length of the piston rod 1 extending into the pneumatic chamber 31 becomes shorter, the volume of the pneumatic chamber 31 increases and the pressure decreases, thus reducing the supporting force on the camera equipment. At the same time, the outer diameter of the piston rod 1 connected to the piston 4 increases, the effective area of ​​the piston 4 decreases, and the pressure on the top surface of the piston 4 decreases, which offsets the air pressure change caused by the shortening of the length of the piston rod 1 extending into the pneumatic chamber 31, keeping the gimbal in a balanced state.

[0040] When the height of the pneumatic gimbal decreases, the length of the piston rod 1 extending into the pneumatic chamber 31 increases, the volume of the pneumatic chamber 31 decreases, and the pressure inside the chamber increases, thus increasing the supporting force on the camera equipment. At the same time, the outer diameter of the piston rod 1 connected to the piston 4 decreases, the effective area of ​​the piston 4 increases, and the pressure on the top surface of the piston 4 increases, which offsets the air pressure change caused by the increased length of the piston rod 1 extending into the pneumatic chamber 31, keeping the gimbal in a balanced state.

[0041] The change in gimbal height ensures that the load-bearing capacity within the air chamber remains constant, preventing increased workload for photographers when adjusting the gimbal's working height and improving the comfort of gimbal adjustment.

[0042] The sealing ring 42 is provided with an air passage 43 that connects to the air pressure chamber 31. When the air pressure in the air pressure chamber 31 increases, the air pressure outside the sealing ring 42 also increases, providing a greater sealing pressure and ensuring the sealing effect of the sealing ring 42.

[0043] In a preferred embodiment, such as Figure 1 and Figure 3 As shown, an end cap 21 is fixedly installed at the bottom of the outer cylinder 2, and the bottom of the piston rod 1 is sealed and fixedly connected to the end cap 21; an inflation channel 11 is opened in the piston rod 1 along its axial direction, and an air inlet channel 22 connected to the inflation channel 11 is opened on one side of the end cap 21, and an air inlet valve 23 connected to the air inlet channel 22 is fixedly installed on one side of the end cap 21; a one-way air valve 12 is connected to the top of the inflation channel 11.

[0044] In this embodiment, the gimbal's air chamber is inflated via a one-way air valve 12. During inflation, an inflation device (such as an air pump or air cylinder) is connected to the air inlet valve 23, and then high-pressure gas is injected into the inflation channel 11 through the air inlet channel 22. The high-pressure gas pushes open the one-way air valve 12 and enters the air chamber. When the air pressure in the air chamber meets the requirements, inflation is complete; at this point, the gimbal can be used normally.

[0045] In a preferred embodiment, such as Figure 3 and Figure 4 As shown, a support assembly 5 is provided at the top of the piston rod 1; the support assembly 5 includes a support ring 51 sleeved on the top of the piston rod 1, a support step 13 is provided at the top of the piston rod 1 below the support ring 51, a retaining spring 52 is snapped onto the piston rod 1 above the support ring 51, and a shaped hole 53 is provided on the support ring 51 to connect its upper and lower parts.

[0046] In this embodiment, the support ring 51 is fixedly installed on the top of the piston rod 1 by the snap ring 52 to support the top of the piston rod 1; the shaped hole 53 reduces the moving resistance of the support ring 51 and ensures the smoothness of the height adjustment of the pneumatic gimbal.

[0047] In a preferred embodiment, such as Figure 3 and Figure 4 As shown, a guide assembly 6 is provided at the top of the outer cylinder 2; the guide assembly 6 includes a plurality of mounting seats 61 evenly distributed around the outer periphery of the outer cylinder 2, the mounting seats 61 are provided with mounting slots 62, and the outer cylinder 2 is provided with clearance slots 24 corresponding to the mounting slots 62. Guide wheels 63 are provided in the mounting slots 62, and the guide wheels 63 pass through the clearance slots 24 and abut against the outer wall of the inner cylinder 3.

[0048] In this embodiment, when the inner cylinder 3 and the outer cylinder 2 move relative to each other, the guide wheel 63 rolls on the outer wall of the inner cylinder 3, which plays a guiding role and improves the smoothness of gimbal height adjustment.

[0049] In a preferred embodiment, such as Figure 1 and Figure 3 As shown, the top of the inner cylinder 3 is sealed and fixedly connected to a support 7, which is used to support the camera equipment.

[0050] In a preferred embodiment, such as Figure 1 and Figure 3 As shown, a handrail ring 8 is provided on the outer periphery of the support 7. The handrail ring 8 is fixedly connected to the support 7 through several connecting rods 81. The height of the gimbal can be easily adjusted through the handrail ring 8.

[0051] In a preferred embodiment, such as Figure 3 and Figure 5As shown, the support 7 is provided with an exhaust channel 71 that communicates with the inner cavity of the inner cylinder 3. A threaded hole 72 that communicates with the exhaust channel 71 is provided on one side of the support 7. An exhaust hole 73 that communicates with the threaded hole 72 is provided on the top of the support 7. An exhaust knob 74 that can block and open the exhaust hole 73 is threadedly connected to the threaded hole 72.

[0052] In this embodiment, when the gimbal is not in use, the exhaust knob 74 is turned outward to connect the exhaust hole 73 with the exhaust channel 71 through the threaded hole 72, so that the gas in the inner cylinder 3 can be discharged, the inner cylinder 3 can be pressed into the outer cylinder 2, and then the exhaust knob 74 can be tightened, which greatly reduces the space occupied by the equipment and facilitates transportation and storage.

[0053] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A gas pressure head for a camera, characterized by comprising: It includes piston rod (1), sliding sleeve outer cylinder (2) and inner cylinder (3); The bottom end of the inner cylinder (3) is sealingly and fixedly connected with a piston (4), so that a closed air pressure cavity (31) is formed in the inner cylinder (3), and a through hole (41) is formed in the piston (4); The piston rod (1) is arranged in the outer cylinder (2), the bottom end of the piston rod (1) is fixedly connected with the bottom end of the outer cylinder (2), the top end of the piston rod (1) extends into the inner cylinder (3) through the through hole (41), and the outer diameter of the piston rod (1) gradually decreases from top to bottom; The inner diameter of the through hole (41) is greater than the maximum outer diameter of the piston rod (1); the through hole (41) is embedded with a sealing ring (42) sleeved on the piston rod (1), and the piston (4) is provided with an air path (43) connected to the air pressure cavity (31) outside the sealing ring (42).

2. The tapered piston rod gas bearing gimbal of claim 1, wherein, The bottom end of the outer cylinder (2) is fixedly provided with an end cover (21), and the bottom end of the piston rod (1) is sealingly and fixedly connected with the end cover (21); an air charging channel (11) is formed in the piston rod (1) along the axial direction of the piston rod (1), one side of the end cover (21) is provided with an air inlet channel (22) connected to the air charging channel (11), and one side of the end cover (21) is fixedly provided with an air inlet valve (23) communicated with the air inlet channel (22); the top end of the air charging channel (11) is connected with a one-way air valve (12).

3. The tapered piston rod gas bearing gimbal of claim 2, wherein, The top end of the piston rod (1) is provided with a support assembly (5); the support assembly (5) comprises a support ring (51) sleeved on the top end of the piston rod (1), a support step (13) is arranged below the top end of the piston rod (1) and located below the support ring (51), a clamping spring (52) is clamped on the piston rod (1) and located above the support ring (51), and a type hole (53) is arranged on the support ring and communicated above and below the support ring.

4. The tapered piston rod gas bearing gimbal of claim 1, wherein, The top end of the outer cylinder (2) is provided with a guide assembly (6); the guide assembly (6) comprises a plurality of mounting seats (61) uniformly distributed on the outer periphery of the outer cylinder (2), the mounting seats (61) are provided with mounting through grooves (62), the outer cylinder (2) is provided with avoidance through grooves (24) corresponding to the mounting through grooves (62), and guide wheels (63) are arranged in the mounting through grooves (62) and abut against the outer wall of the inner cylinder (3) through the avoidance through grooves (24).

5. The tapered piston rod gas bearing gimbal of claim 1, wherein, The top end of the inner cylinder (3) is sealingly and fixedly connected with a support (7).

6. The tapered piston rod gas bearing gimbal of claim 5, wherein, The outer periphery of the support (7) is provided with a handrail ring (8), and the handrail ring (8) is fixedly connected with the support (7) through a plurality of connecting rods (81).

7. The tapered piston rod gas bearing gimbal of claim 5, wherein, An exhaust channel (71) is arranged in the support (7) and communicated with the inner cavity of the inner cylinder (3), a threaded hole (72) is formed in one side of the support (7) and communicated with the exhaust channel (71), an exhaust hole (73) is formed in the top of the support (7) and communicated with the threaded hole (72), and an exhaust knob (74) is threadedly connected with the threaded hole (72) and controls the exhaust hole (73).

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