Expansion device for stage vehicle

Abstract

The invention discloses an expansion device for a stage car, and relates to the technical field of stage car equipment, the expansion device comprises a bearing base and a control device, the control device is fixedly connected with the bearing base, and the bearing base is provided with a bearing groove; the device further comprises an expanding groove, a transmission groove, a first built-in groove, a second built-in groove, an expanding mechanism arranged on the bearing base, a supporting mechanism arranged on the expanding mechanism and a filling mechanism arranged on the bearing base. According to the stage car, the expanding mechanism is arranged, so that the bearing area of the stage car can be expanded, the number of people capable of being contained by the stage car is increased to a certain degree, and the application range of the stage car is widened to a certain degree.

Description

Technical Field

[0001] The present invention relates to the technical field of stage vehicle equipment, and in particular to an expansion device for a stage vehicle. Background Art

[0002] As a mobile performance platform, stage trucks play an important role in various outdoor activities. Traditional stage trucks usually have a fixed stage area and cannot be flexibly adjusted according to actual needs. This limitation often leads to insufficient or wasted stage space when facing performance venues of different sizes and audience numbers. The chassis of the stage truck generally uses a heavy truck or a special trailer to ensure the stability and load-bearing capacity of the vehicle.

[0003] The stage area of ​​current stage vehicles is limited, but the current stage vehicles do not have a structure that can expand the stage area, which limits the performers when performing on the stage vehicles and the number of performers that can be accommodated. This limits the scope of performance projects that the stage vehicles are suitable for, and therefore improvement is urgently needed. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an expansion device for a stage vehicle, aiming to solve the above-mentioned technical problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A stage vehicle expansion device comprises a bearing base and a control device, wherein the control device is fixedly connected to the bearing base, and a bearing groove is provided on the bearing base. The stage vehicle expansion device further comprises: There are two expansion slots, and the two expansion slots are symmetrically arranged on the bearing base; There are two transmission grooves, and the two transmission grooves are symmetrically arranged on the bearing base; There are multiple groups of first built-in grooves, and the multiple groups of first built-in grooves are equidistantly arranged on the bearing base; The second built-in grooves have a plurality of groups, and the plurality of groups of second built-in grooves are equidistantly arranged on the bearing base; An expansion mechanism, disposed on the bearing base and electrically connected to the control device, the expansion mechanism being used to expand the bearing area; The supporting mechanism has four groups, and the four groups of supporting mechanisms are symmetrically arranged on the expansion mechanism in pairs, the supporting mechanism is electrically connected to the control device, and the supporting mechanism is used to support the expansion mechanism; The filling mechanism is arranged on the bearing base and is electrically connected to the control device.

[0006] Preferably, the expansion mechanism comprises: There are two motor support plates, and the two motor support plates are symmetrically arranged on the bearing base, and the motor support plates are fixedly connected to the bearing base; A driving motor is fixedly mounted on the motor support plate, and the driving motor is electrically connected to the control device; A drive shaft, fixedly disposed on the output end of the drive motor; The transmission parts have two groups, and the two groups of transmission parts are symmetrically arranged on the bearing base; The expansion part is arranged between the two groups of transmission parts.

[0007] Preferably, the transmission part comprises: A transmission shaft, rotatably disposed on the bearing base; An active gear roller is located in the expansion groove and is fixedly connected to the transmission shaft; A transmission wheel, arranged at an end of the transmission shaft away from the expansion slot and fixedly connected to the transmission shaft; The connecting sleeve is fixedly arranged on the transmission wheel at a side close to the driving motor, and the connecting sleeve is fixedly connected to the driving shaft.

[0008] Preferably, the expansion unit includes: An expansion board is located in the bearing slot, and the surface of the expansion board close to the supporting mechanism is provided with four inner slots which are symmetrical in pairs; There are two driven tooth plates, and the two driven tooth plates are symmetrically arranged on the expansion plate. The driven tooth plates are fixedly connected to the expansion plate, and the driven tooth plates are meshed with the active gear rollers.

[0009] Preferably, the supporting mechanism comprises: A fixed shaft, fixedly disposed in the inner groove; A rotating frame, rotatably disposed on the fixed shaft; A rolling part, arranged on the rotating frame; The adjusting part is arranged on the rotating frame.

[0010] Preferably, the rolling portion comprises: A ball groove is provided on the rotating frame; The ball bearings are arranged on the rotating frame and are rollingly connected with the ball grooves.

[0011] Preferably, the adjusting unit comprises: A hydraulic push rod, fixedly disposed in the rotating frame and electrically connected to the control device; A support block is fixedly arranged at one end of the hydraulic push rod away from the rotating frame; An auxiliary frame, rotatably disposed at one end of the support block away from the rotating frame; The auxiliary roller is rotatably arranged on the auxiliary frame.

[0012] Preferably, the filling mechanism comprises: A filling plate, disposed in the bearing slot; A first spring is disposed in the first built-in groove and fixedly connected to the bearing base, and one end of the first spring close to the filling plate is fixedly connected to the filling plate; The supporting portion is disposed in the second built-in groove and is electrically connected to the control device.

[0013] Preferably, the supporting portion comprises: An electric push rod, located in the second built-in groove and electrically connected to the control device; The buffer part is arranged at one end of the electric push rod close to the filling plate.

[0014] Preferably, the buffer portion comprises: A buffer sleeve is slidably disposed on one end of the electric push rod close to the filling plate; The second spring is located in the buffer sleeve, and two ends of the second spring are respectively fixedly connected to the electric push rod and the buffer sleeve.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: The device is provided with an expansion mechanism, so that the device can expand the bearing area of ​​the stage vehicle, thereby increasing the number of people that the stage vehicle can accommodate to a certain extent, thereby increasing the application scope of the device to a certain extent.

[0016] The device is provided with a ball bearing, so that when the expansion plate slides out of the bearing slot, it avoids direct contact between the expansion plate and the filling plate, thereby greatly reducing the resistance encountered by the expansion plate when sliding, and to a certain extent improving the smoothness of the expansion plate when sliding out of the bearing slot.

[0017] The device is provided with a supporting mechanism, so that the device can support the expansion board, thereby ensuring that the expansion board can remain stable when the performers perform on the expansion board. At the same time, by providing an adjustment part, the device can adjust the distance between the auxiliary roller and the expansion board, so that the expansion board can always remain in the same horizontal plane with the supporting base under different terrain conditions. On the one hand, it avoids the performers from being tripped due to the height difference, and on the other hand, it further improves the scope of application of the device.

[0018] The device is provided with a filling mechanism, so that the filling plate can move to the initial position of the expansion plate when the expansion plate slides off the bearing slot, thereby avoiding the appearance of pits at the initial position of the expansion plate. At the same time, the device is provided with a buffer part, so that the device can buffer the filling plate, thereby improving the performance experience of the performers to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 A three-dimensional structural schematic diagram of an expansion device for a stage vehicle is shown.

[0021] Figure 2 A front view of an expansion device for a stage vehicle is shown.

[0022] Figure 3 A side view of an expansion device for a stage vehicle is shown.

[0023] Figure 4 Shows Figure 3 Cross-sectional view of BB.

[0024] Figure 5 A top view of an expansion device for a stage vehicle is shown.

[0025] Figure 6 A cross-sectional view of an expansion device for a stage vehicle is shown.

[0026] Figure 7 An exploded view of a partial structure of an expansion device for a stage vehicle is shown.

[0027] Figure 8 An exploded view of the support mechanism is shown.

[0028] Fig. 9 An exploded view of part of the filling mechanism is shown.

[0029] Legend: 1. Load-bearing base; 2. Control device; 3. Load-bearing slot; 4. Expansion slot; 5. Transmission slot; 6. First built-in slot; 7. Second built-in slot; 8. Motor support plate; 9. Drive motor; 10. Drive shaft; 11. Transmission shaft; 12. Active gear roller; 13. Transmission wheel; 14. Connecting sleeve; 15. Expansion plate; 16. Inner slot; 17. Driven gear plate; 18. Fixed shaft; 19. Rotating frame; 20. Ball slot; 21. Ball; 22. Hydraulic push rod; 23. Support block; 24. Auxiliary frame; 25. Auxiliary roller; 26. Filling plate; 27. First spring; 28. Electric push rod; 29. ​​Buffer sleeve; 30. Second spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] Reference Figures 1 to 9An embodiment of an expansion device for a stage vehicle of the present invention is further described.

[0035] A stage vehicle expansion device includes a bearing base 1 and a control device 2, wherein the control device 2 is fixedly connected to the bearing base 1, and a bearing groove 3 is provided on the bearing base 1. The stage vehicle expansion device also includes: There are two expansion slots 4, and the two expansion slots 4 are symmetrically arranged on the supporting base 1; There are two transmission grooves 5, and the two transmission grooves 5 are symmetrically opened on the bearing base 1; There are multiple groups of first built-in grooves 6, and the multiple groups of first built-in grooves 6 are equidistantly arranged on the bearing base 1; There are multiple sets of second built-in grooves 7, and the multiple sets of second built-in grooves 7 are equidistantly arranged on the supporting base 1; Reference Figures 1 to 9 , an expansion mechanism, which is arranged on the bearing base 1 and is electrically connected to the control device 2, and is used to expand the bearing area, and the expansion mechanism includes: There are two motor support plates 8, and the two motor support plates 8 are symmetrically arranged on the bearing base 1, and the motor support plates 8 are fixedly connected to the bearing base 1; A driving motor 9 is fixedly mounted on the motor support plate 8, and the driving motor 9 is electrically connected to the control device 2; A driving shaft 10 is fixedly arranged on the output end of the driving motor 9; The transmission part has two groups, and the two groups of transmission parts are symmetrically arranged on the bearing base 1, and the transmission part includes: A transmission shaft 11 is rotatably disposed on the bearing base 1; The active gear roller 12 is located in the expansion groove 4, and the active gear roller 12 is fixedly connected to the transmission shaft 11; The transmission wheel 13 is arranged at one end of the transmission shaft 11 away from the expansion slot 4 and is fixedly connected to the transmission shaft 11; A connecting sleeve 14 is fixedly disposed on the transmission wheel 13 at a side close to the driving motor 9, and the connecting sleeve 14 is fixedly connected to the driving shaft 10; The expansion part is arranged between the two groups of the transmission parts, and the expansion part includes: The expansion plate 15 is located in the bearing slot 3, and the surface of the expansion plate 15 close to the supporting mechanism is provided with four inner slots 16 which are symmetrical in pairs; There are two driven tooth plates 17 , and the two driven tooth plates 17 are symmetrically arranged on the expansion plate 15 . The driven tooth plates 17 are fixedly connected to the expansion plate 15 , and the driven tooth plates 17 are meshed with the active gear roller 12 .

[0036] Reference Figures 1 to 9 When in use, the bearing base 1 is first fixed on the stage vehicle, and then when the bearing area of ​​the stage vehicle needs to be expanded, it is achieved through the following process. First, the staff controls the driving motor 9 to start through the control device 2, so that the driving shaft 10 fixedly connected to the output end of the driving motor 9 rotates, and then the connecting sleeve 14 fixedly connected to the driving shaft 10 rotates, driving the transmission wheel 13 fixedly connected to the connecting sleeve 14 to rotate, and through the pulley transmission cooperation between the two transmission wheels 13, the transmission wheel 13 on the side away from the driving motor 9 rotates, and the rotation of the transmission wheel 13 drives the transmission shaft 11 fixedly connected to the transmission wheel 13 to rotate, so that the active gear roller 12 fixedly connected to the transmission shaft 11 rotates, and through the meshing between the active gear roller 12 and the driven gear plate 17, the driven gear plate 17 slides out of the expansion slot 4, and then drives the expansion plate 15 fixedly connected to the driven gear plate 17 to slide out of the bearing slot 3, thereby realizing the expansion of the bearing area of ​​the stage vehicle; The device is provided with an expansion mechanism, so that the device can expand the bearing area of ​​the stage vehicle, thereby increasing the number of people that the stage vehicle can accommodate to a certain extent, thereby increasing the application scope of the device to a certain extent.

[0037] Reference Figures 1 to 9 The supporting mechanism has four groups, and the four groups of supporting mechanisms are symmetrically arranged on the expansion mechanism in pairs, the supporting mechanism is electrically connected to the control device 2, and the supporting mechanism is used to support the expansion mechanism. The supporting mechanism includes: A fixed shaft 18, fixedly disposed in the inner groove 16; A rotating frame 19, rotatably disposed on the fixed shaft 18; The rolling part is arranged on the rotating frame 19, and the rolling part includes: A ball groove 20 is provided on the rotating frame 19; The ball 21 is disposed on the rotating frame 19 and is rollingly connected with the ball groove 20; It should be noted that the device is provided with a ball 21, so that when the expansion plate 15 slides away from the bearing slot 3, it avoids direct contact between the expansion plate 15 and the filling plate 26, thereby greatly reducing the resistance encountered by the expansion plate 15 when sliding, and to a certain extent improving the smoothness of the expansion plate 15 when sliding out of the bearing slot 3.

[0038] The adjusting part is arranged on the rotating frame 19, and the adjusting part comprises: A hydraulic push rod 22 is fixedly disposed in the rotating frame 19 and electrically connected to the control device 2; A support block 23, fixedly disposed at one end of the hydraulic push rod 22 away from the rotating frame 19; An auxiliary frame 24 is rotatably disposed at one end of the support block 23 away from the rotating frame 19; The auxiliary roller 25 is rotatably disposed on the auxiliary frame 24 .

[0039] Reference Figures 1 to 9 After the expansion board 15 slides out of the bearing slot 3, the rotating frame 19 is rotated until the rotating frame 19 is perpendicular to the expansion board 15, so that the hydraulic push rod 22 arranged on the rotating frame 19 is rotated to be perpendicular to the expansion board 15, so that the support block 23 fixedly connected to the electric push rod 28 is rotated to be perpendicular to the expansion board 15, thereby driving the auxiliary frame 24 rotatably connected to the support block 23 to rotate to be perpendicular to the expansion board 15, so that the auxiliary roller 25 rotatably connected to the auxiliary frame 24 is rotated to be perpendicular to the expansion board 15, and then the staff starts the hydraulic push rod 22 through the control device 2, so that the support block 23 fixedly connected to the hydraulic push rod 22 moves, and then the auxiliary frame 24 rotatably connected to the support block 23 moves, and then the auxiliary roller 25 rotatably connected to the auxiliary frame 24 moves, until the distance between the auxiliary roller 25 and the expansion board 15 is adjusted to a suitable value, that is, the surface of the expansion board 15 away from the ground and the surface of the bearing base 1 away from the ground are in the same horizontal plane; The device is provided with a supporting mechanism, so that the device can support the expansion board 15, thereby ensuring that the expansion board 15 can remain stable when the performers perform on the expansion board 15. At the same time, by providing an adjustment part, the device can adjust the distance between the auxiliary roller 25 and the expansion board 15, so that the expansion board 15 can always remain in the same horizontal plane with the supporting base 1 under different terrain conditions. On the one hand, it avoids the performers from being tripped due to the height difference, and on the other hand, it further improves the scope of application of the device.

[0040] Reference Figures 1 to 9 , a filling mechanism, which is arranged on the bearing base 1 and is electrically connected to the control device 2, and the filling mechanism includes: A filling plate 26 is disposed in the bearing slot 3; A first spring 27 is disposed in the first built-in groove 6 and fixedly connected to the bearing base 1 , and one end of the first spring 27 close to the filling plate 26 is fixedly connected to the filling plate 26 ; The supporting part is arranged in the second built-in groove 7 and is electrically connected to the control device 2. The supporting part includes: An electric push rod 28, located in the second built-in groove 7 and electrically connected to the control device 2; The buffer part is arranged at one end of the electric push rod 28 close to the filling plate 26, and the buffer part includes: A buffer sleeve 29 is slidably disposed on one end of the electric push rod 28 close to the filling plate 26; The second spring 30 is located in the buffer sleeve 29 , and two ends of the second spring 30 are fixedly connected to the electric push rod 28 and the buffer sleeve 29 respectively.

[0041] Reference Figures 1 to 9 When the expansion plate 15 completely slides out of the bearing slot 3, the control device 2 controls the electric push rod 28 to start, so that the second spring 30 fixedly connected to the electric push rod 28 moves in a direction away from the second built-in slot 7, so that the buffer sleeve 29 fixedly connected to the second spring 30 moves in a direction away from the second built-in slot 7, and then the buffer sleeve 29 pushes the filling plate 26 to slide in a direction away from the second built-in slot 7 until the surface of the filling plate 26 away from the second built-in slot 7 and the surface of the expansion plate 15 away from the second built-in slot 7 are on the same horizontal plane, thereby completing the expansion of the stage vehicle; It should be noted that the device is provided with a filling mechanism, so that the filling plate 26 can move to the initial position of the expansion plate 15 when the expansion plate 15 slides away from the supporting slot 3, thereby avoiding the appearance of a pit at the initial position of the expansion plate 15. At the same time, the device is provided with a buffer part, so that the device can buffer the filling plate 26, which improves the performance experience of the performers to a certain extent.

[0042] Working principle: Refer to Figures 1 to 9 When in use, the bearing base 1 is first fixed on the stage vehicle, and then when the bearing area of ​​the stage vehicle needs to be expanded, it is achieved through the following process. First, the staff controls the driving motor 9 to start through the control device 2, so that the driving shaft 10 fixedly connected to the output end of the driving motor 9 rotates, and then the connecting sleeve 14 fixedly connected to the driving shaft 10 rotates, driving the transmission wheel 13 fixedly connected to the connecting sleeve 14 to rotate, and through the pulley transmission cooperation between the two transmission wheels 13, the transmission wheel 13 on the side away from the driving motor 9 rotates, and the rotation of the transmission wheel 13 drives the transmission shaft 11 fixedly connected to the transmission wheel 13 to rotate, so that the active gear roller 12 fixedly connected to the transmission shaft 11 rotates, and through the meshing between the active gear roller 12 and the driven gear plate 17, the driven gear plate 17 slides out of the expansion slot 4, and then drives the expansion plate 15 fixedly connected to the driven gear plate 17 to slide out of the bearing slot 3, thereby realizing the expansion of the bearing area of ​​the stage vehicle; The device is provided with an expansion mechanism, so that the device can expand the bearing area of ​​the stage vehicle, thereby increasing the number of people that the stage vehicle can accommodate to a certain extent, thereby increasing the application scope of the device to a certain extent.

[0043] After the expansion board 15 slides out of the bearing slot 3, the rotating frame 19 is rotated until the rotating frame 19 is perpendicular to the expansion board 15, so that the hydraulic push rod 22 set on the rotating frame 19 is rotated to be perpendicular to the expansion board 15, so that the support block 23 fixedly connected to the electric push rod 28 is rotated to be perpendicular to the expansion board 15, thereby driving the auxiliary frame 24 rotatably connected to the support block 23 to rotate to be perpendicular to the expansion board 15, so that the auxiliary roller 25 rotatably connected to the auxiliary frame 24 is rotated to be perpendicular to the expansion board 15, and then the staff starts the hydraulic push rod 22 of the control device 2, so that the support block 23 fixedly connected to the hydraulic push rod 22 moves, and then the auxiliary frame 24 rotatably connected to the support block 23 moves, and then the auxiliary roller 25 rotatably connected to the auxiliary frame 24 moves, until the distance between the auxiliary roller 25 and the expansion board 15 is adjusted to a suitable value, that is, the surface of the expansion board 15 away from the ground and the surface of the bearing base 1 away from the ground are in the same horizontal plane; The device is provided with a supporting mechanism, so that the device can support the expansion board 15, thereby ensuring that the expansion board 15 can remain stable when the performers perform on the expansion board 15. At the same time, by providing an adjustment part, the device can adjust the distance between the auxiliary roller 25 and the expansion board 15, so that the expansion board 15 can always remain in the same horizontal plane with the supporting base 1 under different terrain conditions. On the one hand, it avoids the performers from being tripped due to the height difference, and on the other hand, it further improves the scope of application of the device.

[0044] It should be noted that the device is provided with a ball 21, so that when the expansion plate 15 slides away from the bearing slot 3, it avoids direct contact between the expansion plate 15 and the filling plate 26, thereby greatly reducing the resistance encountered by the expansion plate 15 when sliding, and to a certain extent improving the smoothness of the expansion plate 15 when sliding out of the bearing slot 3.

[0045] When the expansion plate 15 completely slides out of the bearing slot 3, the control device 2 controls the electric push rod 28 to start, so that the second spring 30 fixedly connected to the electric push rod 28 moves in a direction away from the second built-in slot 7, so that the buffer sleeve 29 fixedly connected to the second spring 30 moves in a direction away from the second built-in slot 7, and then the buffer sleeve 29 pushes the filling plate 26 to slide in a direction away from the second built-in slot 7 until the surface of the filling plate 26 away from the second built-in slot 7 and the surface of the expansion plate 15 away from the second built-in slot 7 are on the same horizontal plane, thereby completing the expansion of the stage vehicle; It should be noted that the device is provided with a filling mechanism, so that the filling plate 26 can move to the initial position of the expansion plate 15 when the expansion plate 15 slides away from the supporting slot 3, thereby avoiding the appearance of a pit at the initial position of the expansion plate 15. At the same time, the device is provided with a buffer part, so that the device can buffer the filling plate 26, which improves the performance experience of the performers to a certain extent.

[0046] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stage vehicle expansion device, comprising a bearing base (1) and a control device (2), wherein the control device (2) is fixedly connected to the bearing base (1), and a bearing groove (3) is provided on the bearing base (1), characterized in that: The stage vehicle expansion device also includes: There are two expansion slots (4), and the two expansion slots (4) are symmetrically arranged on the bearing base (1); There are two transmission grooves (5), and the two transmission grooves (5) are symmetrically arranged on the bearing base (1); The first built-in grooves (6) have a plurality of groups, and the plurality of groups of first built-in grooves (6) are arranged on the bearing base (1) at equal intervals; The second built-in grooves (7) have a plurality of groups, and the plurality of groups of second built-in grooves (7) are equidistantly arranged on the bearing base (1); An expansion mechanism, arranged on the bearing base (1) and electrically connected to the control device (2), the expansion mechanism being used to expand the bearing area; The supporting mechanism comprises four groups, and the four groups of supporting mechanisms are symmetrically arranged in pairs on the expansion mechanism, the supporting mechanism is electrically connected to the control device (2), and the supporting mechanism is used to support the expansion mechanism; A filling mechanism is arranged on the bearing base (1) and is electrically connected to the control device (2).

2. A stage vehicle expansion device according to claim 1, characterized in that: The expansion agencies include: There are two motor support plates (8), and the two motor support plates (8) are symmetrically arranged on the bearing base (1), and the motor support plates (8) are fixedly connected to the bearing base (1); A drive motor (9) is fixedly mounted on the motor support plate (8), and the drive motor (9) is electrically connected to the control device (2); A drive shaft (10) fixedly disposed on an output end of the drive motor (9); The transmission parts have two groups, and the two groups of transmission parts are symmetrically arranged on the bearing base (1); The expansion part is arranged between the two groups of transmission parts.

3. A stage vehicle expansion device according to claim 2, characterized in that: The transmission part comprises: A transmission shaft (11) rotatably disposed on the bearing base (1); A driving gear roller (12) is located in the expansion groove (4), and the driving gear roller (12) is fixedly connected to the transmission shaft (11); A transmission wheel (13) is arranged at an end of the transmission shaft (11) away from the expansion groove (4) and is fixedly connected to the transmission shaft (11); A connecting sleeve (14) is fixedly arranged on the transmission wheel (13) on a side close to the driving motor (9), and the connecting sleeve (14) is fixedly connected to the driving shaft (10).

4. The stage vehicle expansion device according to claim 3, characterized in that: The development department includes: An expansion plate (15) is located in the bearing groove (3), and a surface of the expansion plate (15) close to the supporting mechanism is provided with four inner grooves (16) which are symmetrical in pairs; The driven tooth plates (17) have two driven tooth plates (17), and the two driven tooth plates (17) are symmetrically arranged on the expansion plate (15), the driven tooth plates (17) are fixedly connected to the expansion plate (15), and the driven tooth plates (17) are meshed with the active tooth roller (12).

5. The stage vehicle expansion device according to claim 4, characterized in that: The supporting mechanism comprises: A fixed shaft (18) fixedly disposed in the inner groove (16); A rotating frame (19) rotatably disposed on the fixed shaft (18); A rolling portion, arranged on the rotating frame (19); The adjustment part is arranged on the rotating frame (19).

6. The stage vehicle expansion device according to claim 5, characterized in that: The rolling part comprises: A ball groove (20) is formed on the rotating frame (19); A ball (21) is disposed on the rotating frame (19) and is rollingly connected to the ball groove (20).

7. The stage vehicle expansion device according to claim 6, characterized in that: The adjustment unit comprises: A hydraulic push rod (22) is fixedly disposed in the rotating frame (19) and is electrically connected to the control device (2); A support block (23) is fixedly arranged on an end of the hydraulic push rod (22) away from the rotating frame (19); An auxiliary frame (24) rotatably disposed on an end of the support block (23) away from the rotating frame (19); An auxiliary roller (25) is rotatably disposed on the auxiliary frame (24).

8. The stage vehicle expansion device according to claim 7, characterized in that: The filling mechanism comprises: A filling plate (26) is arranged in the bearing groove (3); a first spring (27) disposed in the first built-in groove (6) and fixedly connected to the bearing base (1); an end of the first spring (27) close to the filling plate (26) is fixedly connected to the filling plate (26); The supporting portion is arranged in the second built-in groove (7) and is electrically connected to the control device (2).

9. The stage vehicle expansion device according to claim 8, characterized in that: The supporting portion comprises: An electric push rod (28) located in the second built-in groove (7) and electrically connected to the control device (2); A buffer portion is arranged at one end of the electric push rod (28) close to the filling plate (26).

10. The stage vehicle expansion device according to claim 9, characterized in that: The buffer portion comprises: A buffer sleeve (29) is slidably disposed on one end of the electric push rod (28) close to the filling plate (26); The second spring (30) is located in the buffer sleeve (29), and two ends of the second spring (30) are fixedly connected to the electric push rod (28) and the buffer sleeve (29) respectively.

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