CN114893693A

CN114893693A - Slide rail vehicle

Info

Publication number: CN114893693A
Application number: CN202210394900.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Chongqing College of Electronic Engineering
Current assignee: Chongqing College of Electronic Engineering
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-08-12
Also published as: CN114776952A; CN114776952B; CN113404989A; CN113404989B

Abstract

The invention provides a slide rail vehicle, which comprises a bottom plate; four connecting blocks are fixedly arranged at the front and the back of the bottom plate, and rotating shafts are rotatably connected inside the four connecting blocks through bearings; the outer sides of the two rotating shafts are fixedly provided with mounting shafts, and the sliding rail wheels are connected to the outer parts of the mounting shafts in a sliding manner; the bottom of the bottom plate is fixedly provided with a stepping motor through a screw, and the right side of the stepping motor is connected with a second gear; the outer wall of the rotating shaft is fixedly provided with a first gear, and the first gear is meshed with a second gear; the four mounting shafts are provided with the stabilizing blocks on the outer walls, and the four sliding rail wheels are positioned inside the two stabilizing blocks.

Description

Slide rail vehicle

Technical Field

The invention belongs to the technical field of film and television instruments, and particularly relates to a slide rail vehicle.

Background

The camera shooting rail plate car is a newly developed product which is developed by our company according to the requirements of users in the broad video field and overcomes the defects of the like products, has small volume, light weight, quick installation and convenient carrying, and can make the shooting pictures stable and smooth, quickly install, disassemble and transition particularly in the scene of the video play, thereby saving manpower, material resources and competence for the working group.

If the application number is: CN202010595063.1 patent discloses a trackless movie and television camera car, which comprises a telescopic car body mechanism, a left extension support mechanism, a right extension support mechanism, an extension control mechanism, an extension limit mechanism, a telescopic bracket mechanism, a displacement adjustment mechanism and a camera mounting platform, wherein the extension control mechanism is fixedly connected to the middle of the rear end of the telescopic car body mechanism; the left end and the right end of the expansion control mechanism are respectively in transmission connection with the left expansion supporting mechanism and the right expansion supporting mechanism; the left extension supporting mechanism and the right extension supporting mechanism are respectively connected to the left end and the right end of the telescopic vehicle body mechanism in a sliding manner; the trackless film and television camera car does not need to be laid with a track, is convenient and fast to operate and is convenient to carry; the whole body of the invention can be extended or contracted, and the stability of the invention during working can be improved after the extension; after the shrinkage, the whole body is convenient to carry and move or is transported by vehicles, and the occupied area is small.

Based on the foregoing, the inventor discovers that, present camera shooting car is when using, need advance through artifical promotion camera shooting car, staff's intensity of labour has not only been increased, and speed can not keep unanimous when advancing, lead to the quality of making a video recording to descend, and traditional camera shooting car is when using for a long time, the staff easily takes place fatigue, be not convenient for shoot for a long time, the shooting progress has been reduced, secondly current camera shooting car, can not adjust the distance between the rail wheel, make current camera shooting car can not use in different places again, the commonality has been reduced, current camera shooting equipment and staff can not carry out the synchronization adjustment when making a video recording once more, be not convenient for use.

Disclosure of Invention

In order to solve the technical problems, the invention provides a slide rail vehicle which aims to solve the problems that a camera shooting vehicle is pushed to advance manually, workers are easy to fatigue after shooting for a long time, and the distance between rail wheels and camera shooting equipment and the workers cannot be adjusted synchronously during shooting.

The invention relates to a video professional track-variable video slide rail vehicle with a variable wheel track, which has the purpose and the effect and is achieved by the following specific technical means:

a rail car comprising a deck; four connecting blocks are fixedly arranged at the front and the back of the bottom plate, and rotating shafts are rotatably connected inside the four connecting blocks through bearings; the outer sides of the two rotating shafts are fixedly provided with mounting shafts, and the sliding rail wheels are connected to the outer parts of the mounting shafts in a sliding manner; the bottom of the bottom plate is fixedly provided with a stepping motor through a screw, and the right side of the stepping motor is connected with a second gear; the outer wall of the rotating shaft is fixedly provided with a first gear, and the first gear is meshed with a second gear; the outer walls of the four mounting shafts are provided with stabilizing blocks, and the four sliding rail wheels are positioned inside the two stabilizing blocks; the bottom of the bottom plate is fixedly provided with an installation block through a screw, and the bottom of the installation block is fixedly provided with a fixed block through a screw; the wheel track adjusting devices are arranged inside the fixed block and the mounting block, and the front end of the bottom plate is fixedly provided with a limiting device through a screw; a first sliding rail is fixedly mounted at the rear end of the top of the bottom plate, and two sides of the first sliding rail are fixedly provided with second limiting plates through screws; a second screw rod is arranged inside the first slide rail, one end of the second screw rod is arranged inside the second left limiting plate, and the other end of the second screw rod penetrates through the second right limiting plate; a fixing device is connected inside the first sliding rail in a sliding manner; a second sliding rail is fixedly installed at the front end of the top of the bottom plate, and first limiting plates are fixedly installed on two sides of the second sliding rail through screws; a first screw rod is arranged inside the second slide rail, one end of the screw rod is arranged inside the first left limiting plate, and the other end of the screw rod penetrates through the first right limiting plate; a supporting device is connected inside the second sliding rail in a sliding manner; and switches are fixedly arranged at the center of the top of the bottom plate in a bilateral symmetry mode.

Furthermore, the fixing device also comprises a first sliding block, a first fixing rod, a first limiting pin, a first sliding rod, a first fixing plate, a connecting plate, a clamping plate, an adjusting plate and an adjusting rod; the first sliding block is of a T-shaped structure, is connected to the inside of the first sliding rail in a sliding mode, and is connected with the second screw rod through threads; a first fixed rod is fixedly installed at the top of the first sliding block, a first sliding rod is connected inside the first fixed rod in a sliding mode, and the first fixed rod is fixedly connected with the first sliding rod through a first limiting pin; a connecting plate is fixedly arranged at the top of the first sliding rod, a fixing plate is fixedly arranged on the left side of the top of the connecting plate, and an adjusting plate is fixedly arranged on the right side of the top of the connecting plate; the inside sliding connection of connecting plate has the clamp plate, and the clamp plate right side installs the regulation pole to adjust pole threaded connection inside the regulating plate.

Furthermore, the supporting device also comprises a second sliding block, a second fixing rod, a second limiting pin, a second sliding rod, a supporting plate and a hair pad; the second sliding block is of a T-shaped structure, is connected to the inside of the second sliding rail in a sliding mode, and is connected with the first screw rod through threads; a second fixed rod is fixedly installed at the top of the second sliding block, a second sliding rod is connected inside the second fixed rod in a sliding mode, and the second fixed rod and the second sliding rod are fixedly connected through a second limiting pin; the top of the sliding rod II is fixedly provided with a supporting plate, and the top of the supporting plate is provided with a hair pad.

Furthermore, the wheel track adjusting device also comprises a handle, a disc, a first thread, a connecting shaft, a limiting block and a second thread; a limiting block is fixedly arranged at the center of the connecting shaft, and a first thread is arranged at the front end of the connecting shaft; a second thread is formed at the rear end of the connecting shaft, and the direction of the first thread is opposite to that of the second thread; the disc is fixedly installed at the front end of the connecting shaft, the handle is fixedly installed at the front end of the disc, and the connecting shaft is in threaded connection with the insides of the two stabilizing blocks.

Furthermore, the limiting device also comprises a mounting seat, a compression spring and a limiting column; the inside sliding connection of mount pad has spacing post, and spacing post outer wall installs compression spring to spacing post outer end is hemispherical structure.

Further, the wheel track adjusting device further comprises a groove; the groove is annularly arranged on the inner side of the disc and is of a hemispherical structure, and the groove is matched with the outer end of the limiting column.

Further, the sliding rail wheel also comprises a ball; the slide rail wheel is internally and symmetrically installed with balls in a front-back rotating mode, the balls are of a spherical structure, and the outer sides of the balls and the inner wall of the stabilizing block are arranged in a tangent mode.

Furthermore, a servo motor is fixedly installed at the rear end of the right side of the top of the bottom plate through a screw, and the left side of the servo motor is connected with a connector; the right side of the screw rod II is fixedly provided with a belt pulley I, and the right side of the screw rod I is fixedly provided with a belt pulley II; the left side of the connector is fixedly connected with the first belt pulley, and a belt is connected between the first belt pulley and the second belt pulley.

The invention at least comprises the following beneficial effects:

1. the arrangement of the stepping motor enables the device to automatically advance for shooting, the problem that a traditional slide rail vehicle manually advances is solved, the shooting quality is improved, the speed is kept consistent when the slide rail vehicle advances, the arrangement of the first fixing rod and the first limiting pin facilitates workers to adjust the height of the first sliding rod, and the arrangement of the connecting plate, the clamping plate, the adjusting plate and the adjusting rod enables the device to fix cameras of different sizes, improves the universality of the device, the arrangement of the second fixing rod and the second limiting pin facilitates the workers to adjust the height of the second sliding rod, meets the use requirements of different workers, improves the comfort level of the workers due to a hair cushion, facilitates long-time camera shooting, and reduces the fatigue degree of the workers.

2. The arrangement of the handle and the connecting shaft facilitates workers to adjust the distance between the sliding rail wheels, so that the device can be used on rails with different distances to meet different field use requirements, the screw direction of the first screw thread is opposite to that of the second screw thread, the sliding rail wheels on two sides are synchronously adjusted, the adjusting distances on two sides are the same, the use stability of the device is improved, after the workers complete adjustment, the outer end of the limiting column is inserted into the groove to be connected, the automatic limiting function is realized, the device is more stable in use, the camera shooting quality is improved, and the use is convenient.

3. The ball reduces friction between the sliding rail wheel and the stabilizing block, prolongs service lives of the stabilizing block and the sliding rail wheel, and enables the fixing device and the supporting device to be synchronously adjusted through the arrangement of the servo motor, the first belt pulley, the belt, the second belt pulley, the first screw rod and the second screw rod, so that the working personnel and the camera equipment can synchronously move, and the working personnel control the servo motor to work through the switch, so that the operation is simple and the use is convenient.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic front view of the present invention.

Fig. 3 is a schematic bottom view of the present invention.

Fig. 4 is a structural diagram of a part of the components of the invention viewed from the bottom.

Fig. 5 is a schematic structural view of the fixing device of the present invention.

Fig. 6 is a schematic structural view of the supporting device of the present invention.

Fig. 7 is a schematic structural view of the track adjusting device of the present invention.

Fig. 8 is a partially enlarged structural view of a in fig. 2 according to the present invention.

Fig. 9 is a partial enlarged structural view of B in fig. 4 according to the present invention.

Fig. 10 is a partially enlarged structural view of C in fig. 4 according to the present invention.

Fig. 11 is a schematic view of a partially enlarged structure of D in fig. 3 according to the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a base plate; 2. a first limiting plate; 3. a first screw rod; 4. a second screw rod; 5. a fixing device; 501. a first sliding block; 502. fixing a rod I; 503. a first limiting pin; 504. a first sliding rod; 505. a fixing plate; 506. a connecting plate; 507. a clamping plate; 508. an adjusting plate; 509. adjusting a rod; 6. a first slide rail; 7. a second limiting plate; 8. a first belt pulley; 9. a servo motor; 10. a switch; 11. a belt; 12. a second belt pulley; 13. a support device; 1301. a second sliding block; 1302. a second fixing rod; 1303. a second limiting pin; 1304. a second sliding rod; 1305. a support plate; 1306. a hair pad; 14. a second slide rail; 15. a stepping motor; 16. a stabilizing block; 17. a fixed block; 18. a track adjusting device; 1801. a handle; 1802. a disc; 1803. a groove; 1804. a first thread; 1805. a connecting shaft; 1806. a limiting block; 1807. a second thread; 19. a limiting device; 1901. a mounting base; 1902. a compression spring; 1903. a limiting post; 20. a sliding rail wheel; 2021. a ball bearing; 21. connecting blocks; 22. a bearing; 23. a rotating shaft; 24. installing a shaft; 25. mounting blocks; 26. a connector; 27. a first gear; 28. and a second gear.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "two ends," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing and simplifying the description, and are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, and for example, they may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Example (b):

as shown in figures 1 to 11:

the invention provides a slide rail vehicle, which comprises a bottom plate 1; four connecting blocks 21 are fixedly arranged at the front and the rear of the bottom plate 1, and rotating shafts 23 are rotatably connected inside the four connecting blocks 21 through bearings 22; a mounting shaft 24 is fixedly mounted on the outer sides of the two rotating shafts 23, and the sliding rail wheel 20 is connected to the outer portion of the mounting shaft 24 in a sliding manner; the bottom of the bottom plate 1 is fixedly provided with a stepping motor 15 through a screw, and the right side of the stepping motor 15 is connected with a second gear 28; a first gear 27 is fixedly arranged on the outer wall of the rotating shaft 23, and the first gear 27 is meshed with a second gear 28; the outer walls of the four mounting shafts 24 are provided with stabilizing blocks 16, and the four sliding rail wheels 20 are positioned inside the two stabilizing blocks 16; the bottom of the bottom plate 1 is fixedly provided with an installation block 25 through a screw, and the bottom of the installation block 25 is fixedly provided with a fixed block 17 through a screw; the wheel track adjusting device 18 is arranged in the fixed block 17 and the mounting block 25, and the front end of the bottom plate 1 is fixedly provided with a limiting device 19 through a screw; a first sliding rail 6 is fixedly installed at the rear end of the top of the bottom plate 1, and two sides of the first sliding rail 6 are fixedly provided with second limiting plates 7 through screws; a second screw rod 4 is arranged inside the first slide rail 6, one end of the second screw rod 4 is installed inside the second left limiting plate 7, and the other end of the second screw rod 4 penetrates through the second right limiting plate 7; the fixing device 5 is connected inside the first sliding rail 6 in a sliding manner; a sliding rail II 14 is fixedly installed at the front end of the top of the bottom plate 1, and limiting plates I2 are fixedly installed on two sides of the sliding rail II 14 through screws; a first screw rod 3 is arranged inside the second slide rail 14, one end of the first screw rod 3 is installed inside the first left limiting plate 2, and the other end of the first screw rod 3 penetrates through the first right limiting plate 2; the supporting device 13 is connected inside the second sliding rail 14 in a sliding manner; the switch 10 is fixedly arranged at the center of the top of the bottom plate 1 in a bilateral symmetry mode.

The fixing device 5 further comprises a first sliding block 501, a first fixing rod 502, a first limit pin 503, a first sliding rod 504, a fixing plate 505, a connecting plate 506, a clamping plate 507, an adjusting plate 508 and an adjusting rod 509; the first sliding block 501 is of a T-shaped structure, the first sliding block 501 is connected inside the first sliding rail 6 in a sliding mode, and the first sliding block 501 is connected with the second screw rod 4 through threads; the top of the first sliding block 501 is fixedly provided with a first fixing rod 502, the inside of the first fixing rod 502 is connected with a first sliding rod 504 in a sliding manner, and the first fixing rod 502 and the first sliding rod 504 are fixedly connected through a first limiting pin 503; a connecting plate 506 is fixedly installed at the top of the first sliding rod 504, a fixing plate 505 is fixedly installed at the left side of the top of the connecting plate 506, and an adjusting plate 508 is fixedly installed at the right side of the top of the connecting plate 506; the inside sliding connection of connecting plate 506 has clamping plate 507, and clamping plate 507 installs on the right side adjusting rod 509 to adjusting rod 509 threaded connection is inside adjusting plate 508, and the setting of dead lever 502 and spacer pin 503 is convenient for the staff to adjust the height of slide bar 504, and connecting plate 506, clamping plate 507, adjusting plate 508 and adjusting rod 509's setting for the device can be fixed the camera of different sizes, has improved the commonality of the device.

The supporting device 13 further includes a second sliding block 1301, a second fixing rod 1302, a second limit pin 1303, a second sliding rod 1304, a supporting plate 1305 and a hair pad 1306; the second sliding block 1301 is of a T-shaped structure, the second sliding block 1301 is connected inside the second sliding rail 14 in a sliding mode, and the second sliding block 1301 is connected with the first screw rod 3 through threads; a second fixed rod 1302 is fixedly installed at the top of the second sliding block 1301, a second sliding rod 1304 is connected inside the second fixed rod 1302 in a sliding mode, and the second fixed rod 1302 and the second sliding rod 1304 are fixedly connected through a second limiting pin 1303; two 1304 top fixed mounting of slide bar have a backup pad 1305, and the backup pad 1305 top installs the hair pad 1306, and the setting of two 1302 and two 1303's of dead lever, the staff of being convenient for adjusts the height of two 1304 of slide bars, satisfies different staff and uses, and the hair pad 1306 has improved staff's comfort level, is convenient for make a video recording for a long time and uses, has alleviateed staff's tired degree.

The track adjusting device 18 further comprises a handle 1801, a disc 1802, a first thread 1804, a connecting shaft 1805, a limiting block 1806 and a second thread 1807; a limiting block 1806 is fixedly mounted at the center of the connecting shaft 1805, and a first thread 1804 is formed at the front end of the connecting shaft 1805; the rear end of the connecting shaft 1805 is provided with a second thread 1807, and the thread directions of the first thread 1804 and the second thread 1807 are opposite; connecting axle 1805 front end fixed mounting has disc 1802, and disc 1802 front end fixed mounting has handle 1801, and connecting axle 1805 threaded connection is inside two steady blocks 16, handle 1801 and connecting axle 1805's setting, make things convenient for the staff to adjust the distance between slide rail wheel 20, make the device use on the track of different intervals again, satisfy different place user demand, and screw thread 1804 and two 1807 screw thread opposite directions, make the slide rail wheel 20 of both sides carry out the synchronization adjustment, and the adjusting distance of both sides is the same, the stability in use of the device has been improved.

The limiting device 19 further comprises a mounting seat 1901, a compression spring 1902 and a limiting column 1903; a limiting column 1903 is connected inside the mounting seat 1901 in a sliding manner, a compression spring 1902 is mounted on the outer wall of the limiting column 1903, the outer end of the limiting column 1903 is of a hemispherical structure, and the wheel track adjusting device 18 further comprises a groove 1803; the disc 1802 is inboard seted up to recess 1803 annular, and recess 1803 is the hemisphere type structure to recess 1803 and spacing post 1903 outer end phase-match, after the staff adjusts the completion, spacing post 1903 outer end inserts to be connected inside recess 1803, has realized automatic limit function, makes the device more stable when using, has improved the quality of making a video recording, convenient to use.

Wherein, the rail wheel 20 further comprises a ball 2021; the balls 2021 are rotatably mounted in the slide rail wheel 20 in a front-back symmetrical manner, the balls 2021 are of a spherical structure, the outer side of each ball 2021 is tangent to the inner wall of the stabilizing block 16, and the balls 2021 reduce friction between the slide rail wheel 20 and the stabilizing block 16, so that the service lives of the stabilizing block 16 and the slide rail wheel 20 are prolonged.

Wherein, the rear end of the right side of the top of the bottom plate 1 is fixedly provided with a servo motor 9 through a screw, and the left side of the servo motor 9 is connected with a connector 26; a belt pulley I8 is fixedly arranged on the right side of the screw rod I4, and a belt pulley II 12 is fixedly arranged on the right side of the screw rod I3; connector 26 left side and belt pulley 8 fixed connection, and be connected with belt 11 between belt pulley 8 and the belt pulley two 12, servo motor 9, belt pulley 8, belt 11, belt pulley two 12, the setting of lead screw 3 and lead screw two 4, make fixing device 5 and strutting arrangement 13 carry out synchronous adjustment, make staff and camera equipment carry out synchronous motion, and the staff passes through switch 10 control servo motor 9 work, and easy operation, convenient to use.

The specific use mode and function of the embodiment are as follows:

when the camera shooting device is used, firstly, a worker moves the camera shooting device to a shooting site, then the worker adjusts the distance between the sliding rail wheels 20 through the handle 1801 and the connecting shaft 1805 according to the distance between the rails, so that the camera shooting device can be used on the rails with different distances to meet the use requirements of different sites, the screw directions of the first screw thread 1804 and the second screw thread 1807 are opposite, so that the sliding rail wheels 20 on two sides are synchronously adjusted, the adjusting distances on the two sides are the same, the use stability of the camera shooting device is improved, then the worker places camera shooting equipment on the top of the connecting plate 506, clamps the camera shooting equipment through the adjusting rod 509, so that the camera shooting device can fix cameras with different sizes, the universality of the camera shooting device is improved, and then the worker adjusts the heights of the first sliding rod 504 and the second sliding rod 1304 through the first limiting pin 503 and the second limiting pin 503 according to the use requirements, satisfy different staff and use, the staff can control servo motor 9 work through foot push switch 10 for fixing device 5 and strutting arrangement 13 carry out the synchronization adjustment, make staff and camera equipment carry out synchronous motion, easy operation, convenient to use.

The invention is not described in detail, but is well known to those skilled in the art.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A slide rail car is characterized in that: comprises a bottom plate (1); four connecting blocks (21) are fixedly arranged at the front and the rear of the bottom plate (1), and rotating shafts (23) are rotatably connected inside the four connecting blocks (21) through bearings (22); mounting shafts (24) are fixedly mounted on the outer sides of the two rotating shafts (23), and the sliding rail wheels (20) are connected to the outer portions of the mounting shafts (24) in a sliding mode; a stepping motor (15) is fixedly installed at the bottom of the bottom plate (1) through a screw, and a second gear (28) is connected to the right side of the stepping motor (15); a first gear (27) is fixedly mounted on the outer wall of the rotating shaft (23), and the first gear (27) is meshed with a second gear (28); the outer walls of the four mounting shafts (24) are provided with stabilizing blocks (16), and the four sliding rail wheels (20) are positioned inside the two stabilizing blocks (16); the bottom of the bottom plate (1) is fixedly provided with an installation block (25) through a screw, and the bottom of the installation block (25) is fixedly provided with a fixed block (17) through a screw; a wheel track adjusting device (18) is arranged in the fixed block (17) and the mounting block (25), and a limiting device (19) is fixedly arranged at the front end of the bottom plate (1) through a screw; a first sliding rail (6) is fixedly installed at the rear end of the top of the bottom plate (1), and two sides of the first sliding rail (6) are fixedly provided with second limiting plates (7) through screws; a second screw rod (4) is arranged inside the first sliding rail (6), one end of the second screw rod (4) is installed inside the second left limiting plate (7), and the other end of the second screw rod penetrates through the second right limiting plate (7); a fixing device (5) is connected inside the first sliding rail (6) in a sliding manner; a second sliding rail (14) is fixedly installed at the front end of the top of the bottom plate (1), and limiting plates (2) are fixedly installed on two sides of the second sliding rail (14) through screws; a first screw rod (3) is arranged inside the second sliding rail (14), one end of the first screw rod (3) is installed inside the first left limiting plate (2), and the other end of the first screw rod penetrates through the first right limiting plate (2); a supporting device (13) is connected inside the second sliding rail (14) in a sliding manner; switches (10) are fixedly arranged at the center of the top of the bottom plate (1) in a bilateral symmetry manner;

the track adjusting device (18) further comprises a handle (1801), a disc (1802), a first thread (1804), a connecting shaft (1805), a limiting block (1806) and a second thread (1807); a limiting block (1806) is fixedly mounted at the center of the connecting shaft (1805), and a first thread (1804) is formed at the front end of the connecting shaft (1805); a second thread (1807) is formed at the rear end of the connecting shaft (1805), and the thread directions of the first thread (1804) and the second thread (1807) are opposite; a disc (1802) is fixedly mounted at the front end of the connecting shaft (1805), a handle (1801) is fixedly mounted at the front end of the disc (1802), and the connecting shaft (1805) is in threaded connection with the insides of the two stabilizing blocks (16);

the sliding rail wheel (20) further comprises a ball (2021); balls (2021) are symmetrically and rotatably arranged in the slide rail wheel (20) in a front-back manner, the balls (2021) are of a spherical structure, and the outer side of each ball (2021) is tangent to the inner wall of the stabilizing block (16);

the limiting device (19) further comprises a mounting seat (1901), a compression spring (1902) and a limiting column (1903); a limiting column (1903) is connected inside the mounting seat (1901) in a sliding mode, a compression spring (1902) is installed on the outer wall of the limiting column (1903), and the outer end of the limiting column (1903) is of a hemispherical structure;

the track adjusting device (18) further comprises a groove (1803); the annular of recess (1803) is seted up in disc (1802) inboard, and recess (1803) is hemisphere type structure to recess (1803) and spacing post (1903) outer end phase-match.

2. The video professional variable-track video trolley according to claim 1, wherein: the fixing device (5) further comprises a first sliding block (501), a first fixing rod (502), a first limiting pin (503), a first sliding rod (504), a fixing plate (505), a connecting plate (506), a clamping plate (507), an adjusting plate (508) and an adjusting rod (509); the first sliding block (501) is of a T-shaped structure, the first sliding block (501) is connected inside the first sliding rail (6) in a sliding mode, and the first sliding block (501) is connected with the second screw rod (4) through threads; the top of the first sliding block (501) is fixedly provided with a first fixing rod (502), the inside of the first fixing rod (502) is connected with a first sliding rod (504) in a sliding mode, and the first fixing rod (502) and the first sliding rod (504) are fixedly connected through a first limiting pin (503); a connecting plate (506) is fixedly mounted at the top of the first sliding rod (504), a fixing plate (505) is fixedly mounted on the left side of the top of the connecting plate (506), and an adjusting plate (508) is fixedly mounted on the right side of the top of the connecting plate (506); the clamping plate (507) is connected to the inside of the connecting plate (506) in a sliding mode, the adjusting rod (509) is installed on the right side of the clamping plate (507), and the adjusting rod (509) is connected to the inside of the adjusting plate (508) in a threaded mode.

3. The video professional variable-track video trolley according to claim 1, wherein: the supporting device (13) further comprises a second sliding block (1301), a second fixing rod (1302), a second limiting pin (1303), a second sliding rod (1304), a supporting plate (1305) and a hair pad (1306); the second sliding block (1301) is of a T-shaped structure, the second sliding block (1301) is connected inside the second sliding rail (14) in a sliding mode, and the second sliding block (1301) is connected with the first screw rod (3) through threads; a second fixed rod (1302) is fixedly mounted at the top of the second sliding block (1301), a second sliding rod (1304) is connected inside the second fixed rod (1302) in a sliding mode, and the second fixed rod (1302) and the second sliding rod (1304) are fixedly connected through a second limiting pin (1303); a supporting plate (1305) is fixedly installed at the top of the second sliding rod (1304), and a hair pad (1306) is installed at the top of the supporting plate (1305).

4. The video professional variable-track video trolley according to claim 1, wherein: the rear end of the right side of the top of the bottom plate (1) is fixedly provided with a servo motor (9) through a screw, and the left side of the servo motor (9) is connected with a connector (26); a first belt pulley (8) is fixedly installed on the right side of the second screw rod (4), and a second belt pulley (12) is fixedly installed on the right side of the first screw rod (3); the left side of the connecting head (26) is fixedly connected with the first belt pulley (8), and a belt (11) is connected between the first belt pulley (8) and the second belt pulley (12).