Cantilever lifting stage

Abstract

The present invention discloses a cantilever lifting stage, comprising: a platform; a support guide device for supporting the platform and lifting the platform in a vertical direction; a support locking device for locking the platform after the platform is lifted to a desired position; a platform driving device for driving the platform to move up and down along the support guide device; a lifting compensation device for preventing the platform driving device from being damaged during the process of the support locking device locking the platform; and a control device for connecting with each device and controlling the corresponding actions of each device. The cantilever lifting stage of the present invention occupies a small space, is easy to install and maintain, is easy to manufacture and has a low cost. It can be used in performance venues with limited space, can carry a higher load, can effectively prevent the cantilever platform from overturning due to excessive bearing capacity, can effectively lock the platform when it reaches the desired position, and avoid the platform from suddenly falling and damaging the driving device, thereby improving the working safety of the equipment and avoiding damage to the personal safety of performers.

Description

Technical Field

[0001] The invention relates to the technical field of stage machinery, and in particular to a cantilever lifting stage. Background Art

[0002] In the past decade, with the increasing enrichment of people's cultural life, the demand for and products in the performance market have become more and more diversified. In order to improve the stage effect, theaters usually use liftable stages to present a lively three-dimensional performance effect.

[0003] Existing liftable stages are usually used in some large theaters. The early designs of these theaters are relatively complete and the civil engineering conditions are relatively ideal. For example, the depth of the foundation pit and the burial of embedded parts all have enough space to arrange the guide mechanism of the lift stage and other devices. Therefore, the lift stage in large theaters currently usually uses a guide rail guide structure similar to an elevator, that is, guide rails are set on both sides of the supporting structure for guidance.

[0004] However, the places where performances can be watched now are no longer limited to traditional large theaters, but can also be held in other theaters, such as theaters built with the development of tourism. Usually, these theaters are small-scale stages with shallow foundation pits or limited space that are rebuilt or redesigned from some traditional stages. The civil engineering conditions of these stages are not ideal, and the space is small and it is impossible to set rails on both sides of the supporting structure. In this case, the elevator-type guide device used in large theaters to set rails on both sides is no longer applicable. In addition, in addition to the static load and dynamic load that the existing theater needs to bear, the above-mentioned stage often bears the huge load of the forklift set up for the performance, and the existing guide device does not take this factor into consideration.

[0005] In addition, in the existing liftable stage, the auxiliary support of the lift body is in the form of pin insertion and extraction. When the lift body stops, the pin on the lift body extends horizontally and inserts into the locking hole of the guide device to lock the body. The following problems exist when using this pin locking structure: a. There are high requirements for the stop positioning of the lift body, otherwise the pin cannot be inserted into the corresponding locking hole; b. The guide cone surface that facilitates the insertion of the pin into the locking hole will generate lateral force, which will generate additional force on the lift stage guide device and easily cause damage to the guide device; c. There is great resistance when the pin is pulled out, and the pin is often difficult to pull out; d. The mechanism using pin locking is heavy and costly; e. The shear force on the pin after locking the platform is very large, and there is a risk of the platform suddenly falling due to the breakage of the pin, which affects the working safety of the equipment and poses a risk to the personal safety of the performers.

[0006] Therefore, those skilled in the art are in urgent need of developing a stage device that can be applied to performing arts performance venues with limited occupied space. Summary of the invention

[0007] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a cantilever lifting stage, which occupies a small space, is easy to install and maintain, is easy to manufacture and has low cost. It can be used in performance venues with limited space, can carry a higher load, and can effectively prevent the cantilever platform from overturning due to excessive bearing capacity. When the platform reaches the required position, the platform can be effectively locked to prevent the platform from suddenly falling and damaging the driving device, thereby improving the working safety of the equipment and avoiding damage to the personal safety of performers.

[0008] To achieve the above-mentioned purpose of the present invention, the present invention provides a cantilever lifting stage, which includes: a platform; a support guide device for supporting the platform and making the platform rise and fall in a vertical direction; a support locking device for locking the platform after the platform is lifted to a desired position; a platform driving device for driving the platform to rise and fall along the support guide device; a lifting compensation device for preventing damage to the platform driving device during the process of locking the platform by the support locking device; and a control device for connecting with each device and controlling the corresponding actions of each device.

[0009] Among them, the supporting and guiding device includes: a supporting structure arranged on the building structure with one side of the structure being the stage side and the other side being the auditorium side; a pair of tracks extending in parallel in the vertical direction and installed on the stage side of the supporting structure; and a guiding connection mechanism that rollingly connects the platform extending toward the auditorium side of the supporting structure and the pair of tracks.

[0010] Preferably, the track is an H-shaped steel, and the guide connection mechanism includes: a main wheel mechanism installed on the platform and used to contact the flange of the track; and a secondary wheel mechanism installed on the platform and used to contact the web of the track.

[0011] Wherein, the main wheel mechanism includes a plurality of main wheel groups which are installed on the stage side of the platform from top to bottom in the vertical direction and roll along the flanges of a pair of tracks.

[0012] Preferably, the multiple pairs of main wheel sets are symmetrically arranged at both ends of the platform.

[0013] Preferably, the main wheel group includes: a first roller group for rolling along the portion of the flange of the corresponding track extending out from one side of the web; a second roller group for rolling along the portion of the flange of the corresponding track extending out from the other side of the web; wherein the first roller group and the second roller group are symmetrically arranged on both sides of the web.

[0014] Preferably, each roller group includes: a main bracket for detachably connecting to the platform body, having a connecting frame arranged perpendicular to the length extension direction of the track; two groups of roller structures installed in parallel on the connecting frame, and the roller axes of the roller structures extend along the thickness direction of the track web; wherein the two groups of roller structures are respectively located on the inner and outer sides of the flange of the corresponding track.

[0015] Furthermore, each roller group also includes a wheel gap eccentricity adjustment structure for adjusting the distance between the two groups of roller structures.

[0016] Furthermore, the guide connection mechanism also includes a protective structure for preventing the platform from overturning relative to the track due to a malfunction.

[0017] Wherein, the secondary wheel mechanism comprises a plurality of side wheel groups which are installed on the stage side of the platform from top to bottom along the vertical direction and are spaced apart from the main wheel mechanism.

[0018] Preferably, the multiple pairs of side wheel sets are symmetrically arranged at both ends of the platform.

[0019] Preferably, the side wheel group includes roller groups symmetrically arranged on both sides of the corresponding track webs, and the roller axes of the roller groups extend in a direction perpendicular to the thickness of the webs.

[0020] Preferably, the protection structure comprises a plurality of groups of anti-misalignment plates respectively arranged on the inner side and the outer side of the corresponding rail web.

[0021] Wherein, the support locking device includes: multiple pairs of movable leg mechanisms installed on both sides of the platform body, and multiple pairs of support seats installed on both sides of the building structure; or, multiple pairs of movable leg mechanisms installed on both sides of the building structure for accommodating the cantilever lifting stage, and multiple pairs of support seats installed on both sides of the platform body; wherein, the multiple pairs of movable leg mechanisms are used in pairs with the multiple pairs of support seats, and the legs of the movable leg mechanisms can rotate relative to the platform body or the building structure and extend outward or inward of the platform body so as to abut against the corresponding support seats and lock the platform body.

[0022] Furthermore, the movable leg mechanism includes: a movable leg assembly, having a base and the leg connected to the platform or the building structure, one end of the leg being rotatably connected to the base and the other end being hinged to the base; a leg drive assembly, connected to the leg and used to drive the leg to rotate relative to the base to extend or retract.

[0023] Furthermore, the movable leg mechanism also includes a position detection assembly, which detects the extended or retracted position of the leg and sends the detection result to the control system of the cantilever lifting stage, so that the control system controls the leg drive assembly to drive the leg to rotate according to the detection result.

[0024] Preferably, the base has a vertical plate for connecting to a platform body or a building structure and a pair of ear plates arranged perpendicular to the vertical plate, one end of the leg is connected to one end of the pair of ear plates, and the other end of the leg is connected to the other end of the pair of ear plates.

[0025] Preferably, the base is also provided with reinforcing ribs which are respectively vertically connected to the vertical plate and a pair of ear plates, and a reinforcing ear plate which has one end fixedly connected to the reinforcing ribs and is arranged parallel to the ear plate, and the other end of the support leg is respectively connected to the other end of the pair of ear plates and the other end of the reinforcing ear plate through a first rotating shaft.

[0026] Preferably, the reinforcing ear plate is located between a pair of ear plates, a pair of first support arms separated by the reinforcing ear plate are installed on the first rotating shaft, one end of the pair of first support arms is rotatably connected to the three second support arms through the second rotating shaft, and the other end of the support leg is rotatably connected to the three second support arms through the third rotating shaft.

[0027] Preferably, a fixing sleeve perpendicular to the first ear plate is arranged on the outer side of the first ear plate of the base.

[0028] Preferably, a groove is provided at the other end of the supporting leg, and a middle supporting arm located in the middle of the three second supporting arms is inserted into the groove and rotatably connected to the third rotating shaft.

[0029] Wherein, the outrigger drive assembly includes an electric drive mechanism, a hydraulic drive mechanism, or a pneumatic drive mechanism.

[0030] Preferably, when the outrigger drive assembly includes an electric drive mechanism, it also includes a torque compensation mechanism for preventing damage to the rotary drive.

[0031] Preferably, the torque compensation mechanism includes: a torque arm arranged parallel to the first ear plate, with a first through hole at one end and a second through hole at the other end; a bolt having an optical axis section for passing through the first through hole of the torque arm and a threaded section for threaded connection with the fixing sleeve; a flexible connecting piece sleeved outside the optical axis section of the bolt and in the first through hole, which is a buffer sleeve made of elastic material; a buffer piece located between the head of the bolt and the buffer sleeve, which is a circular buffer cover plate; wherein the first rotating shaft passes through the second through hole of the torque arm and is rotatably connected to the torque arm.

[0032] Preferably, the electric drive mechanism comprises: a rotary driver installed outside the torque arm, whose output shaft is rotationally connected to the torque arm; a transmission mechanism whose power input component is connected to the output shaft of the rotary driver, and whose power output component is connected to the first rotating shaft.

[0033] Preferably, the transmission mechanism is a gear transmission mechanism, a belt transmission mechanism, or a sprocket transmission mechanism.

[0034] Wherein, the position detection assembly is a mechanical travel switch or a micro switch or a photoelectric sensor or an encoder.

[0035] Preferably, the support base has a connecting portion for connecting to a platform body or a building structure and a slot for the supporting legs to abut against.

[0036] Among them, the jacking compensation device includes two sets of jacking compensation mechanisms, each set of jacking compensation mechanisms includes: a movable plate used to be connected to one side of the lower end of the platform; a fixed plate used to be connected to a rigid chain of the platform driving device, which is arranged parallel to the movable plate and located below the movable plate; a pair of guide components respectively connected to the fixed plate and the movable plate and can cause the movable plate and the fixed plate to produce relative displacement under the action of external force.

[0037] Wherein, the guide assembly includes: a guide shaft which passes through a movable plate at the top and a fixed plate at the bottom; a limit plate fixedly connected to the top end of the guide shaft; and a shaft positioning plate fixedly connected to the bottom end of the guide shaft.

[0038] Furthermore, each set of the lifting compensation mechanism also includes one or more contact plates installed between the movable plate and the fixed plate.

[0039] Furthermore, the guide assembly also includes a sleeve installed in the guide through hole of the movable plate for the guide shaft to pass through.

[0040] Preferably, a connection portion of the platform body for connecting with the movable plate is provided with a receiving groove.

[0041] Compared with the prior art, the cantilever lifting stage of the present invention has the following outstanding advantages:

[0042] 1. The cantilever lifting stage of the present invention occupies a small space, is easy to install and maintain, is easy to manufacture and has low cost. It can be used in performance venues with limited space, can carry a higher load, and can effectively prevent the cantilevered platform from overturning due to excessive bearing capacity. When the platform reaches the required position, the platform can be effectively locked to avoid the platform from suddenly falling and damaging the driving device, thereby improving the working safety of the equipment and avoiding damage to the personal safety of performers. It is suitable for popularization and use.

[0043] 2. The cantilever lifting stage of the present invention is provided with a pair of tracks on the supporting structure of the building structure, and main wheel mechanisms and auxiliary wheel mechanisms matched with the corresponding tracks are respectively provided on both sides of the stage body. The main wheel mechanism and the auxiliary wheel mechanism are respectively abutted against the corresponding track flange and web, so that the lifting and lowering of the stage along the track can be guided horizontally and vertically. Combined with the secondary protection function of the anti-dislocation plate in the protection structure, the possibility of overturning of the platform of the cantilever lifting stage is completely eliminated from the perspective of mechanical structure, avoiding the safety hazard of accidental tipping over due to a forklift suddenly carrying a large load on the platform, making the entire stage safe and stable.

[0044] 3. The cantilever lifting stage of the present invention can effectively lock the stage body when the stage body reaches the desired position, avoiding the sudden drop of the stage body and damaging the rigid chain, greatly improving the service life and operational safety of the stage, avoiding damage to the personal safety of performers, and preventing the motor overload caused by the stage body when docking, thereby extending the overall service life of the equipment.

[0045] The present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1a It is a partial perspective view of the cantilever lifting stage of the present invention when a supporting locking device is adopted;

[0047] Figure 1b This is a perspective view of the upper steel column structure of the cantilever lift stage;

[0048] Figure 2a This is the main view of the cantilever lift stage;

[0049] Figure 2b yes Figure 2a Left view of the cantilever lift stage;

[0050] Figure 3 It is a schematic diagram of the cantilever lifting stage of the present invention when another supporting locking device is adopted;

[0051] Figure 4 yes Figure 2a A magnified view of part A in FIG.

[0052] Figure 5 yes Figure 2a A magnified view of part B in FIG.

[0053] Figure 6 yes Figure 2a A magnified view of part C in FIG.

[0054] Figure 7 yes Figure 2a A magnified view of part D in FIG.

[0055] Figure 8 yes Figure 2a A magnified view of part E in FIG.

[0056] Figure 9a It is a partial enlarged view of the main support mechanism;

[0057] Figure 9b It is a schematic diagram of the relative position of the roller of the roller structure and the rail flange;

[0058] Fig.9c It is a perspective view of the roller structure from one perspective;

[0059] Fig.10 It is a structural schematic diagram of the roller group in the main wheel group;

[0060] Fig.11 yes Fig.10 The left side view of the main wheel assembly and roller assembly shown;

[0061] Fig.12 yes Fig.10 AA view of the main wheel assembly and roller assembly shown;

[0062] Fig.13 yes Fig.11 Middle B view;

[0063] Fig.14 yes Fig.13 Middle CC view;

[0064] Fig.15 It is a partial exploded view of the wheel clearance eccentric adjustment structure;

[0065] Fig.16 It is a structural schematic diagram of the roller group in the side wheel group;

[0066] Fig.17 yes Fig.16 The left side view of the side wheel group roller group shown;

[0067] Fig.18 yes Fig.16 A top view of the side wheel assembly and roller assembly shown;

[0068] Fig.19 yes Fig.17 Medium AA view;

[0069] Fig.20a is a perspective view of the movable leg mechanism;

[0070] Fig.20b It is a schematic diagram of the movable leg mechanism being installed on the side of the platform;

[0071] Fig.21 It is an exploded view of the movable leg mechanism;

[0072] Fig. 22 It is the front view of the movable outrigger mechanism;

[0073] Fig.23 It is the left view of the movable outrigger mechanism;

[0074] Fig.24 is a top view of the movable outrigger mechanism;

[0075] Fig.25 yes Fig.23 AA section view;

[0076] Fig.26 yes Fig.24 BB cross-sectional view;

[0077] Fig. 27 yes Fig. 22 CC section view;

[0078] Fig.28 yes Fig.24 DD cross-sectional view;

[0079] Fig.29 yes Fig.23 EE cross-sectional view;

[0080] Fig.30 It is the front view of the movable leg assembly;

[0081] Fig.31 It is the left side view of the movable leg assembly;

[0082] Fig.32 is a rear view of the movable outrigger assembly;

[0083] Fig.33 yes Fig.30 AA section view;

[0084] Fig.34 yes Fig.32 BB cross-sectional view;

[0085] Fig.35 It is a perspective view of the base;

[0086] Fig.36 It is a schematic diagram of a perspective of the jacking compensation device installed on the platform;

[0087] Fig.37 It is a schematic diagram of another angle of view of the jacking compensation device installed on the platform;

[0088] Fig.38 is a perspective view of the jacking compensation device;

[0089] Fig.39 It is the front view of the jacking compensation device;

[0090] Fig.40 is a top view of the jacking compensation device;

[0091] Fig.41 It is a bottom view of the jacking compensation device. DETAILED DESCRIPTION

[0092] like Figure 1a FIG. 1 is a partial perspective view of a cantilever lift stage using a structural support locking device according to the present invention. Figure 1b The figure is a perspective view of the upper structure of the upper steel column of the lifting stage. Figure 2a , Figure 2b As shown in the figure, they are the front view and left view of the cantilever lifting stage. Figure 3 FIG. 1 is a schematic diagram of another structural support locking device of the present invention. Figure 4-Figure 8 They are Figure 2a Magnified image of the AE part in .

[0093] As can be seen from the figure, the cantilever lifting stage of the present invention includes: a platform; a support guide device for supporting the platform and making the platform rise and fall in the vertical direction; a support locking device for locking the platform after the platform is lifted to a desired position; a platform driving device for driving the platform to rise and fall along the support guide device; a lifting compensation device for preventing damage to the platform driving device during the process of locking the platform by the support locking device; and a control device for connecting with each device and controlling the corresponding actions of each device.

[0094] Among them, the supporting and guiding device of the present invention includes: a supporting structure arranged on a building structure and having one side thereof being the stage side and the other side being the auditorium side; a guiding structure arranged on the supporting structure, which includes: a pair of rails 6 extending in parallel in the vertical direction and installed on the stage side of the supporting structure; a guiding connection mechanism that rollingly connects a platform 1 extending toward the auditorium side of the supporting structure with a pair of rails; wherein the rails are H-shaped steel, and the guiding connection mechanism includes: a main wheel mechanism installed on the platform of the cantilever lifting stage and used for contacting the flange of the rail (the side flange may also be referred to as the inner flange of the rail); and a secondary wheel mechanism installed on the platform of the cantilever lifting stage and used for contacting the web of the rail.

[0095] The support and guide device of the cantilever lifting stage of the present invention adopts a pair of tracks to support the platform body of the lifting stage, so that the stage forms a cantilever lifting stage. Compared with the elevator-type lifting stage of the existing large theater that requires two pairs of tracks, the space occupied is reduced, so that the stage can be used in performing arts performance venues with limited space, and the applicable venue range is wider. The installation and maintenance are convenient, and the manufacturing is easy and the cost is low. The lifting stage supported by the support and guide device can bear a higher load, and the cantilever lifting stage can be effectively prevented from overturning due to excessive bearing capacity.

[0096] Specifically, the upper part of the building structure for accommodating the cantilever lifting stage of the present invention is in the shape of a U and the lower part is an open or semi-open space. The supporting structure is arranged on the wall of the building structure, one side is the stage side facing away from the audience, and the other side is the auditorium side facing the audience.

[0097] Among them, the support structure of the present invention can be adopted as follows Figure 2a , Figure 3The first structure shown includes: a pair of lower steel columns 8 of the same height fixedly installed at both ends of the stage side of the lower ground, each lower steel column 8 extends in the vertical direction, and the lower end is fixedly connected to the lower ground through a lower steel column support seat, and the upper end is fixedly connected to the ring beam on the wall through an upper steel column support seat; two pairs of upper steel columns 7 extending in the vertical direction and of the same height, the lower ends of which are respectively fixedly connected to the upper ground through two pairs of lower steel column support seats, and the upper ends are fixedly connected to the ring beam 14 on the wall through upper steel column support seats, the first pair of upper steel columns 7 is located directly above the pair of lower steel columns 8 (that is, on the stage side of the upper ground), the second pair of upper steel columns 7 is located on the auditorium side of the upper ground and is symmetrically arranged with the first pair of upper steel columns 7, and the upper parts of the upper steel columns 7 are all made of concrete walls.

[0098] The wall above the upper steel columns 7 on the stage side, the upper steel columns 7 (referring to the steel columns in the first pair of upper steel columns), the wall between the upper steel columns and the lower steel columns, and the lower steel columns of the supporting structure form a support body extending vertically from top to bottom for supporting the corresponding track. The wall above the upper steel columns 7 on the audience side, the upper steel columns 7, and the wall below the upper steel columns 7 form a structure suspended below, and the wall (or support) above the upper steel columns 7 on the audience side and the stage side provides support for the movable leg mechanism 2 that is deployed after the lifting stage body is lifted and moved into place (correspondingly, as Figure 6 As shown, a support base 3 is installed on the wall to support the unfolded movable leg mechanism 2).

[0099] Alternatively, the support structure of the present invention can also remove the second pair of upper steel columns of the first structure and use the wall of the building structure to perform the function of the second pair of upper steel columns. Alternatively, the stage side of the support structure directly uses a pair of upper steel columns and a pair of lower steel columns to be aligned up and down and connected to the wall of the building structure as a whole to form a support body for supporting the track.

[0100] It should be noted that, in practical applications, the structure of the support structure can be determined according to the actual situation of the building structure where the cantilever lifting stage is to be set, and the number and number of layers of upper steel columns and lower steel columns can be determined according to the building structure and the height of the lifting stage. However, the present invention only takes the first support structure including upper and lower layers of steel columns as an example to illustrate the structure of the lifting stage and related devices.

[0101] Among them, a pair of parallel tracks 6 are respectively fixed on a support body formed by a first pair of upper steel columns 7 and a pair of lower steel columns 8 on the stage side of the supporting structure through a plurality of track connection structures arranged from top to bottom. The tracks are made of H-shaped steel, and the upper steel columns and the lower steel columns can be made of H-shaped steel or other structures. Preferably, the steel columns of the present invention are made of H-shaped steel.

[0102] During assembly, one side flange of the H-shaped steel column is oriented toward the auditorium side (this side flange can be called the inner flange of the steel column). Correspondingly, one side flange of the track is placed parallel to the flange of the steel column (such as Figure 4 As shown, the side flange is called the outer flange of the track). The track is connected to the corresponding upper steel column and lower steel column by the track connection structure in the same way. Below, the connection between the track and the steel column is described by taking the connection with the lower steel column as an example.

[0103] Among them, the track connection structure connecting the track to the steel column can be adopted as follows Figure 4 In the first structure shown, the track connection structure includes a column support 20, a column support pad 19, a guide rail support 17, a guide rail support pad 18, a track pressure plate 13 and bolts.

[0104] Among them, the column support 20 and the guide rail support 17 are both L-shaped, that is, both include a vertical plate and a horizontal plate. The vertical plate of the column support is fixedly installed on the inner flange of the lower steel column 8, and the vertical plate can be welded to the steel column by welding. The vertical plate of the guide rail support is fixedly installed on the outer flange of the track by bolts. During installation, the guide rail support pad 18 and the track pressure plate 13 can be placed on both sides of the vertical plate and the track flange respectively, and then the track and the guide rail support are fixed together by bolts passing through each part.

[0105] The guide rail support is arranged above the column support, and the horizontal plate of the guide rail support is arranged above the horizontal plate of the column support. The column support pads 19 are arranged above the horizontal plate of the guide rail support and below the horizontal plate of the column support, and then the zero plates are fixed together by bolts.

[0106] The track connection structure that connects the track to the concrete wall can be adopted as follows Figure 5 The second structure shown, the track connection structure includes a concrete support 27, a column support pad 19, a guide rail support 17, a guide rail support pad 18, a track pressure plate 13, an R-type chemical anchor bolt 28 and bolts. Among them, the column support pad 19, the guide rail support 17, the guide rail support pad 18, and the track pressure plate 13 can all use the parts in the first structure, and the assembly method is also the same. The difference is that since the track needs to be connected to the wall, the second structure uses a concrete support 27 to replace the column support 20 in the above-mentioned first structure. The concrete support 27 adopts the same L-shaped structure as the column support 20, and is fixed to the concrete wall with multiple R-type chemical anchor bolts 28. During assembly, the guide rail support is set above the concrete support, and the horizontal plate of the guide rail support is placed above the horizontal plate of the concrete support. The column support pads are respectively placed above the horizontal plate of the guide rail support and below the horizontal plate of the concrete support, and then the zero plates are fixed together by bolts.

[0107] The platform body 1 of the lifting stage of the present invention extends from the stage side of the supporting structure toward the auditorium side, and includes a horizontal table top and a frame supporting the table top. The frame is a truss structure that is approximately a right-angled triangle. The top end surface of the frame horizontally supports the table top, and the side end surface perpendicular to the top end surface is used to install a guide connection mechanism to connect with the track, and the inclined surface faces the auditorium side.

[0108] Among them, the guide connection mechanism installed on the side end surface of the platform can be adopted as follows Figure 9a-9c The structure shown includes: a main wheel mechanism installed on the side end surface of the frame and used to contact the flange of the track made of H-shaped steel (the side flange can also be called the inner flange of the track); and a secondary wheel mechanism installed on the side end surface of the frame and used to contact the web of the H-shaped steel.

[0109] The main wheel mechanism includes multiple main wheel sets 4 installed on the stage side of the platform (i.e., the side end surface of the platform) from top to bottom in the vertical direction and rolling along the flanges of a pair of tracks. The multiple main wheel sets can be symmetrically arranged in pairs at both ends of the platform, i.e., on both sides of the side end surface of the platform. Figure 9a-9c As shown, each pair of main wheel groups 4 includes: a first roller group for rolling along the portion of the corresponding track flange extending from one side of the web; a second roller group for rolling along the portion of the corresponding track flange extending from the other side of the web; wherein the first roller group and the second roller group are symmetrically arranged on both sides of the track web.

[0110] Preferably, the first roller group and the second roller group of the present invention have the same structure, and each roller group can be used as follows: Figure 10-Figure 14 The structure shown includes: a main bracket 407 for detachably connecting to the side end face of the platform, having a main connecting frame arranged perpendicular to the length extension direction of the track; two roller structures installed in parallel on the main connecting frame, and the roller shafts 412 of the roller structures extend along the thickness direction of the track web; wherein the two roller structures are respectively located on the inner side (the inner side refers to the side facing the web) and the outer side (the outer side refers to the side away from the web) of the corresponding track flange.

[0111] Next, combine Figure 9a-Figure 14 The structure of the roller group in the main wheel group is described in detail.

[0112] The main bracket 407 of the roller group is used to be detachably connected to the side end face of the platform. The main bracket 407 has a vertical plate extending in the vertical direction and connected to the side end face of the platform through multiple bolts, and a main connecting frame extending in a direction perpendicular to the length extension direction of the track. The main connecting frame is located on the side of the vertical plate away from the steel column and is vertically connected to the vertical plate. Two support shafts 410 extending in the thickness direction of the track web are installed side by side on the main connecting frame. Parts of the two support shafts extend out of the main connecting frame, and the two roller structures are respectively installed on the parts of the two support shafts extending out of the main connecting frame.

[0113] like Figure 9a-Figure 14 As shown, the roller structure includes a pair of roller assemblies arranged in parallel and a connecting assembly for connecting the pair of roller assemblies to one end of the corresponding support shaft 410 (ie, the portion extending outside the main connecting frame).

[0114] The roller assembly includes a roller shaft 412 and rollers 417 with bearing retaining rings 416 at both ends respectively sleeved on the roller shaft 412 . The roller shaft 412 extends along the thickness direction of the rail web.

[0115] The connecting assembly includes a screw seat whose two ends are sleeved on the outside of one end of the corresponding support shaft 410 through a pair of shaft sleeves 413, and a pair of roller brackets 401 used to connect the screw seat with a pair of roller shafts 412 of a pair of roller assemblies. The screw seat is arranged in parallel with the roller, and the pair of roller brackets 401 are respectively located at both ends of the roller. Correspondingly, the roller brackets are provided with a central through hole located in the center and two through holes symmetrical to the central through hole, the support shaft 410 passes through the central through hole, and the pair of roller shafts pass through the other two through holes respectively.

[0116] During assembly, the end of one end of the support shaft 410 extends out of the screw seat and the roller bracket, and a front end cover 415 is installed on the protruding part. The front end cover 415 is fixed to the screw seat by multiple screws 414 to connect with the roller bracket. The other roller bracket is positioned by the shoulder and / or bushing set on the support shaft 410.

[0117] The two ends of the roller shaft 412 pass through the corresponding roller brackets, and one or both ends are fixed to the roller brackets through shaft covers or nuts. When fixed, the anti-rotation structure can be used to prevent the wheel shaft from rotating relative to the roller bracket. The anti-rotation structure can be used as follows: Fig.12 The structure shown is as follows: the shaft cover or nut is semicircular, the lower edge of the semicircle abuts against the square pressure plate 405, and the pressure plate abuts against the semicircular structure to prevent the roller shaft from rotating, and the pressure plate 405 is fixed to the corresponding roller bracket by the countersunk screw 406. In addition, the anti-rotation structure of the prior art can also be used to prevent the roller shaft from rotating. When the roller structure is assembled on the track, a pair of rollers contact the inner side (or outer side) of the corresponding track flange.

[0118] In addition to the above-mentioned components, the roller group also includes an eccentric wheel gap adjustment structure for adjusting the distance between the two roller structures (i.e., the distance between the two support shafts), so that the rollers of the two roller structures can be located on the inner and outer sides of the track flange respectively and the gap between them can be maintained at a reasonable value (the gap between the roller edge and the flange is about 1 mm) and move up and down along the track flange to drive the platform to move up and down along the track.

[0119] The wheel gap eccentricity adjustment structure of the present invention adjusts the distance between the two roller structures by adjusting the distance between a pair of support shafts connected to the two roller structures. Fig.15 The structure shown includes: a pair of the above-mentioned support shafts 410 , a pair of wheel frame 418 and a pair of rear end covers 411 , etc. Each support shaft 410 is connected to a wheel frame 418 and a rear end cover 411 .

[0120] Specifically, the support shaft 410 is an eccentric shaft with a shoulder in the middle and the two sides of the shoulder are offset from each other. The shaft diameter of the part used to connect with the roller structure (i.e., one end of the above-mentioned support shaft) is smaller than the shaft diameter of the part used to connect with the main connecting frame, and the central axes of the two parts do not overlap.

[0121] The wheel frame 418 is fixedly mounted on the main connecting frame, is cylindrical in shape, and has a length extension direction parallel to the extension direction of the roller shaft. One end or both ends extend out of the main connecting frame, and the larger portion of the shaft diameter corresponding to the support shaft 410 is mounted inside the wheel frame and can rotate relative to the wheel frame. A pair of wheel frames 418 are arranged in parallel on the main connecting frame.

[0122] The rear end cover 411 is used to fix the corresponding support shaft rotated to the required angle on the wheel set frame. The cross section of the rear end cover 411 is in the shape of a large cut circle, that is, the rear end cover is an end cover with a straight side. Correspondingly, the cross section of the part of the wheel set frame 418 that extends out of the main connecting frame and is used to cooperate with the rear end cover (referred to as the extended end) is in the shape of a small cut circle that cooperates with the above-mentioned large cut circle, that is, a straight boss is provided on one side of the extended end of the wheel set frame, and the straight boss just matches the straight side of the rear end cover of the main connecting frame.

[0123] In order to lock the support shaft through the rear end cover, a locking shaft structure is also provided: a plurality of screw holes or through holes evenly distributed along the circumferential direction are provided on the end face of the other end of the support shaft (the number of screw holes or through holes can be set according to the angle requirement when the support shaft rotates), and a plurality of through holes or screw holes evenly distributed along the circumferential direction are provided on the rear end cover (usually the number of through holes or screw holes on the rear end cover is greater than the number of through holes or screw holes on the support shaft). When the spacing between the two groups of roller structures needs to be adjusted, the support shaft of each roller structure is rotated. Since the support shaft is an eccentric shaft, the rotation of the two support shafts will cause the spacing between the two to change, and the change in spacing will cause the spacing between the roller structures installed on the smaller diameter part of the support shaft to change. When the spacing between the two roller structures is adjusted to the required distance, the support shaft does not need to continue to rotate. At this time, the rear end cover 411 is connected to the other end of the support shaft 410 by screws 408 and washers 409. Since the straight side surface of the rear end cover 411 is just engaged with the straight boss of the wheel frame 418, the rear end cover cannot rotate relative to the wheel frame, that is, the support shaft will not rotate relative to the wheel frame, so the distance between the two roller structures will not change.

[0124] The present invention can adjust the gap between the rollers in the two roller structures and the rail flange by rotating the eccentric shaft. After the adjustment is in place, the eccentric shaft can be locked by screws, and the position of the eccentric shaft can be locked by the cooperation between the rear end cover and the wheel assembly frame, thereby ensuring the reliability of the connection and facilitating on-site debugging.

[0125] Furthermore, the guide connection mechanism of the present invention includes, in addition to the main wheel mechanism for contacting the flange of the track, a secondary wheel mechanism for contacting the web of the track, the secondary wheel mechanism including multiple side wheel groups 5 installed on the stage side of the platform from top to bottom in the vertical direction and spaced apart from the main wheel mechanism. The multiple side wheel groups can be symmetrically arranged in pairs at both ends of the platform, such as Figure 9a As shown, each pair of side wheel groups includes a pair of roller groups symmetrically arranged on both sides of the corresponding track web, and the roller axes of the roller groups extend along the direction perpendicular to the thickness of the web.

[0126] Specifically, the pair of roller groups of the side wheel group have the same structure, and each roller group can be used as follows: Figure 9a , Figure 16-Figure 19 The structure shown includes: a secondary bracket 502 for detachably connecting with the side end surface of the platform, having a secondary connecting frame arranged perpendicular to the length extension direction of the track; a secondary roller structure installed on the secondary connecting frame, and the roller shaft 508 of the secondary roller structure extends along the thickness direction of the track flange. The secondary roller structure is located on the inner side or outer side of the corresponding track web, the inner side of the web refers to the side of the track opposite to the other track, and the outer side refers to the side of the track opposite to the other track.

[0127] Next, combine Figure 9a , Figure 16-Figure 19 The structure of the roller group in the side wheel group is described in detail.

[0128] The auxiliary bracket 502 of the roller group is used to be detachably connected to the side end face of the platform. The auxiliary bracket 502 has a vertical plate extending in the vertical direction and connected to the side end face of the platform through multiple bolts, and an auxiliary connecting frame extending in a direction perpendicular to the length extension direction of the track. The auxiliary connecting frame is located on the side of the vertical plate away from the steel column and is vertically connected to the vertical plate. A pair of ear plates parallel to the side end face of the platform and extending outside the auxiliary connecting frame are arranged at intervals on the auxiliary connecting frame. A support shaft 510 extending in the thickness direction of the track flange is fixed on the pair of ear plates, and the auxiliary roller structure is installed on the support shaft.

[0129] like Figure 16-Figure 19 As shown, the auxiliary roller structure includes a pair of roller assemblies arranged in parallel and a roller bracket 501 for connecting the pair of roller assemblies with a support shaft 510 .

[0130] The roller assembly includes a roller shaft 508, and rollers 507 with bearing retaining rings 509 at both ends respectively mounted on the roller shaft 508, and the roller shaft 508 extends along the thickness direction of the rail flange. A pair of roller assemblies are placed at both ends of the roller bracket 501, and both ends of the roller shaft of each roller assembly pass through the clamping ears at the corresponding ends of the roller bracket 501, and are fixed to the roller bracket through a pressure plate 505, and the pressure plate 505 is fixed to the roller bracket through a countersunk screw 506. The pressure plate, the roller bracket, and the roller shaft are connected by a structure for preventing the roller shaft from rotating as in the above-mentioned main wheel assembly, which will not be described in detail here.

[0131] The center of the roller bracket 501 is provided with a through hole for fitting the support shaft 510. During assembly, the support shaft 510 is fixed to the central through hole of the roller bracket 501 by means of a sleeve 511 fitted outside the support shaft 510. The support shaft 510 includes a large circular portion with a large circular cross section and a cylindrical portion. The radius of the large circular portion is greater than the radius of the cylindrical portion and the two are concentric. The cylindrical portion is fitted on the inner column of the sleeve, and the large circular portion is exposed outside the roller bracket. A square pressing plate 503 is provided outside the roller bracket to dock with the straight side of the large circular portion. The pressing plate 503 is fixed to the roller bracket by a countersunk screw 504. The pressing plate prevents the support shaft 510 from rotating relative to the roller bracket. In addition, the anti-rotation structure of the prior art can also be used to prevent the support shaft from rotating. When the auxiliary roller structure is assembled on the track, a pair of rollers contact the inner side (or outer side) of the corresponding track web.

[0132] The present invention provides a guiding function for the stage body to move along the track flange through the main wheel mechanism, and provides a guiding function for the stage body to move along the track web through the secondary wheel mechanism. The double guiding function can make the stage body stably lifted and lowered, and effectively prevent the stage from overturning relative to the track due to excessive load, so that a large-load stage can be lifted and lowered by adopting double guide rail support and guidance. While reducing the occupied space, the stability and safety of the stage lifting are greatly improved, and the requirements for site construction are low, so that the lifting stage of the present invention has a wider range of applications.

[0133] Furthermore, the guide connection mechanism of the present invention, in addition to the above-mentioned main wheel mechanism and auxiliary wheel mechanism, also includes a protection structure for preventing the platform from overturning relative to the track due to failure of these two mechanisms.

[0134] like Figure 8-Figure 13 As shown, the protection structure of the present invention includes a plurality of groups of anti-misalignment plates respectively arranged on the inner and outer sides of the corresponding rail webs (the number of groups of anti-misalignment plates is the same as the number of pairs of main wheel mechanisms), each group of anti-misalignment plates includes two pairs of anti-misalignment plates 404, each pair of anti-misalignment plates is arranged on the flanges of a pair of roller groups (such as Figure 8 On the corresponding side of the track (as shown), two pairs of anti-misalignment plates are arranged up and down in the vertical direction of the track flange.

[0135] During the design, a pair of parallel connecting rods are arranged on the main connecting frame of the roller structure in each roller group of the main wheel mechanism. The extending direction of the connecting rod is perpendicular to the support shaft 410, that is, the connecting rod extends in the vertical direction. The two ends of the connecting rod extend out of the main connecting frame and are provided with threads. The two anti-dislocation plates 404 are respectively fixed to the two ends of the connecting rod by screws 402 and flat washers 403. The anti-dislocation plate 404 is suspended at the top of the connecting rod, and a U-shaped clamping opening is opened at the center of one end. During assembly, the opening direction of the clamping opening faces the corresponding track flange direction and is clamped outside the flange.

[0136] When the main wheel mechanism, the auxiliary wheel mechanism, especially the roller of the main wheel mechanism fails or falls off, the multiple pairs of anti-misalignment plates of the protective structure can lean against the track flange to prevent the stage body from overturning.

[0137] As can be seen from the above, the support and guide device of the present invention is provided with a pair of tracks on the supporting structure of the building structure, and the main wheel mechanism and the auxiliary wheel mechanism that match the corresponding tracks are respectively provided on both sides of the stage body. The main wheel mechanism and the auxiliary wheel mechanism are respectively abutted against the corresponding track flange and the web, so that the lifting and lowering of the stage along the track can be guided horizontally and vertically. Combined with the secondary protection function of the anti-dislocation plate in the protection structure, the possibility of the platform body of the cantilever lifting stage being overturned is completely eliminated from the mechanical structure, and the safety hazard of accidental tipping over due to a forklift suddenly carrying a large load on the platform body is avoided, so that the entire stage is safe and stable. In addition, the gap between the two roller structures in each roller can be adjusted by the eccentric shaft, and the gap between the roller and the track flange can be accurately adjusted, effectively avoiding the shaking of the platform body due to the excessive gap between the roller in the main wheel mechanism and the track flange, and also avoiding the excessive friction resistance when the roller moves along the flange due to the small gap, which makes the platform body difficult to lift or the roller is seriously worn and damaged, and the effect is more ideal. In particular, the wheel gap eccentric adjustment structure and the anti-dislocation plate of the protection structure are all arranged on the roller group of the main wheel mechanism, which makes the structure of the entire roller group more compact, and also makes it possible to set up the cantilever lifting stage of the present invention in a performance venue with limited space. It is easy to install and maintain, easy to manufacture, low cost, and suitable for popularization and use.

[0138] The support locking device of the present invention comprises: multiple pairs of movable leg mechanisms installed on both sides of the platform; multiple pairs of support seats installed on both sides of the building structure; or multiple pairs of movable leg mechanisms installed on both sides of the building structure for accommodating the cantilever lifting stage, and multiple pairs of support seats installed on both sides of the platform; wherein the multiple pairs of movable leg mechanisms are used in pairs with the multiple pairs of support seats, and the legs of the movable leg mechanisms can rotate relative to the platform or the building structure and extend outward or inward of the platform so as to abut against the corresponding support seats and lock the platform. wherein the number of pairs of movable leg mechanisms and support seats is two pairs or more than two pairs.

[0139] That is, the multiple pairs of movable leg mechanisms of the present invention can be symmetrically installed on both sides of the platform, and the multiple pairs of support bases can be correspondingly installed on both sides of the building structure (such as Figure 1a-Figure 2b As shown, two pairs of movable leg mechanisms are symmetrically installed on the upper part of both sides of the platform, and correspondingly, two pairs of support seats are symmetrically installed on both sides of the building structure, or two pairs of support seats are symmetrically installed on both sides of the support structure arranged on the inner wall of the building structure); or, multiple pairs of movable leg mechanisms can be symmetrically installed on both sides of the building structure, and multiple pairs of support seats can be correspondingly installed on both sides of the platform (such as Figure 3 The movable leg mechanism has rotatable and retractable legs, and the support seat has a connection portion for connecting the platform or building structure and a slot for the legs to abut against. Regardless of the method, the movable leg mechanism and the support seat are used in conjunction to effectively lock the platform when it reaches the desired position, thereby preventing the platform from falling suddenly, improving the working safety of the equipment, and avoiding damage to the personal safety of the performers.

[0140] The structure of the support locking device of the present invention is described in detail below by taking the example that the movable leg mechanism is installed on the platform body and the support base is installed on the building structure.

[0141] like Figure 1a-Figure 2b , Figure 6 , Fig.20b As shown, the present invention symmetrically installs two pairs of movable leg mechanisms 2 on both sides of the upper part of the platform 1 of the cantilever lifting stage, and each movable leg mechanism 2 includes: a movable leg assembly 201, which has a base and a leg for connecting to the platform, one end of the leg is rotatably connected to the base, and the other end is hinged to the base; a leg driving assembly, which is connected to the leg and is used to drive the leg to rotate relative to the base to extend or retract. In addition, it also includes a position detection assembly, which detects the extension or retraction position of the leg and sends the detection result to the control device of the cantilever lifting stage, so that the control device controls the angle of the leg driving assembly to drive the leg to rotate according to the detection result.

[0142] Specifically, the movable leg assembly 201 is connected to the platform body 1 of the cantilever lifting stage through the base 2101. The base 2101 can be made of Fig.35The structure shown includes: a vertical plate 21012 for connecting the platform body and a pair of ear plates 21014 arranged perpendicularly to the vertical plate. In order to strengthen the connection strength between the vertical plate and the pair of ear plates, a reinforcing top plate perpendicular to the vertical plate and the ear plate can also be added, which connects the top of the pair of ear plates and the top of the vertical plate into one. One end of the leg 2104 is connected to one end of the pair of ear plates 21014, and the other end of the leg 2104 is connected to the other end of the pair of ear plates 21014. Correspondingly, a first through hole 21011 is provided at one end of the pair of ear plates, and a second through hole 21017 is provided at the other end. The above through holes all penetrate the ear plates along the thickness direction of the corresponding ear plates. It should be noted that one end here refers to the upper part of the corresponding element in the figure, and the other end refers to the lower part of the corresponding element in the figure. Among them, in order to improve the connection strength between the vertical plate and the ear plate without interfering with the rotation activity of the leg, the reinforcing top plate preferably adopts a top plate with an avoidance gap in the middle, and the gap is arc-shaped.

[0143] In order to prevent interference with the rotation of the legs, a pair of ear plates adopts a structure that is wide at the top and narrow at the bottom, and the upper part of the legs is connected to the first through hole 21011 through the connecting shaft 2105. When connected, a sleeve 2106 is sleeved on the connecting shaft 2105, and one end of the connecting shaft 2105 is a stepped shaft (such as Fig.33 As shown in the figure, the outer diameter of the larger diameter portion of the stepped shaft is larger than the inner diameter of the first through hole, so that the larger diameter portion protrudes outside the first through hole during assembly, that is, protrudes outside the corresponding side ear plate. The protruding larger diameter portion is in the form of a large cut circle, and a screw hole is processed on the corresponding side ear plate (or the fixed plate installed on the outside of the ear plate). The pressing plate is fixed to the ear plate (or the above-mentioned fixed plate) by passing the screw 2102 through the square pressing plate 2107 and the screw hole on the ear plate. The edge of the pressing plate just abuts against the edge of the larger diameter portion of the connecting shaft, thereby preventing the connecting shaft 2105 from rotating relative to a pair of ear plates through the pressing plate. When designing, the size of the abutment between the pressing plate 2107 and the large cut circle of the connecting shaft can be slightly larger than the size of the connecting shaft at the connection.

[0144] The base 2101 of the present invention has, in addition to the vertical plate and a pair of ear plates, Fig.35 As shown, there are also provided reinforcing ribs 21015 respectively connected vertically to the vertical plate and a pair of ear plates, and a reinforcing ear plate 21016 having one end fixedly connected to the reinforcing ribs and arranged parallel to the ear plate. The shape and structure of the reinforcing ribs 21015 may be the same as those of the above-mentioned reinforcing top plate and arranged parallel to the bottom of the reinforcing top plate. The top of the reinforcing ear plate is fixedly connected to the reinforcing ribs, and a through hole penetrating the ear plate along the thickness direction of the ear plate is provided at the corresponding position of the lower part of the reinforcing ear plate and the second through hole of the lower part of the pair of ear plates, that is, the three through holes may be penetrated, and a rotating shaft (that is, the first rotating shaft 2113) may be passed through the three through holes, and the lower part of the leg is connected to the three through holes through the first rotating shaft 2113, that is, connected to the three ear plates.

[0145] Among them, Figure 20a-Figure 35As shown, the reinforcing ear plate 21016 is located between a pair of ear plates, and a pair of first support arms 2111 separated by the reinforcing ear plate 21016 and located between a pair of ear plates 21014 are installed on the first rotating shaft. The pair of first support arms are rotatably connected to one end of the three second support arms 2103 through the second rotating shaft 2118, and the lower part of the support leg 2104 is rotatably connected to the three second support arms 2103 through the third rotating shaft 2112.

[0146] During the design, among the three second support arms, the middle support arm located in the middle is connected to the portion of the second shaft located between the pair of first support arms, and the pair of support arms located on both sides are connected to the portion of the second shaft located outside the pair of first support arms. In order to facilitate the connection with the support legs and not interfere with the rotation of the support legs, after assembly, the pair of support arms on both sides should be located outside the support legs 2104, that is, the spacing between the opposite sides of the pair of support arms on both sides should be greater than the width of the connection part of the support legs. In addition, a groove is provided in the middle position of the lower part of the support legs, and the middle support arm is inserted into the groove and is rotationally connected to the third shaft. The three second support arms are connected to the support legs to increase the connection strength, so as to improve the locking effect of the support legs on the position of the platform.

[0147] It should be noted that corresponding shaft sleeves, cover plates and other components are provided at the connection between each rotating shaft and the corresponding support arm and ear plate. For example, the first shaft sleeve 2114 is respectively provided at the connection position between the first rotating shaft 2113 and a pair of ear plates, and one end of the first rotating shaft 2113 extends out of a part of the corresponding side ear plate; the second shaft sleeve is respectively provided at the connection position between the second rotating shaft and a pair of ear plates, and each second shaft sleeve is axially limited by a cover plate, and the cover plate is fixed to the corresponding end of the second rotating shaft by screws 2116; the third shaft sleeve 2119 is respectively provided at the connection position between the third rotating shaft and a pair of ear plates and the reinforcing ear plate, and the third shaft sleeves at both ends are axially limited by a cover plate, and a pair of cover plates are fixed to both ends of the third rotating shaft by screws 2120. In addition, other components such as gaskets 2122 can be provided as needed.

[0148] In addition, a fixing sleeve 21013 perpendicular to the first ear plate is provided on the outer side of the first ear plate of the base, and is used to connect with the leg driving assembly that drives the leg to rotate relative to the base through the fixing sleeve. The leg driving assembly includes a driving mechanism, which can be an electric driving mechanism, a hydraulic driving mechanism, or a pneumatic driving mechanism. When the leg driving assembly includes an electric driving mechanism, it also includes a torque compensation mechanism for preventing damage to the rotating driver. The structure of the leg driving assembly driven by a motor is described in detail below.

[0149] like Figure 22-Figure 29As shown, the electric drive mechanism includes: a rotary driver 209 for providing power, which can be a DC reducer; a transmission mechanism whose power input component is connected to the motor output shaft, and whose power output component is connected to the first rotating shaft. The transmission mechanism can be a gear transmission mechanism, a belt transmission mechanism, or a sprocket transmission mechanism. When a sprocket transmission mechanism is used, the following can be used: Figure 22-Figure 29 The structure shown includes: a driving sprocket 208 installed on the output shaft of the motor, and a driven sprocket 211 connected to the driving sprocket through a chain 221, and the sprocket shaft of the driven sprocket 211 is the first rotating shaft 2113.

[0150] When the rotary driver is working, the power is transmitted to the first rotating shaft through the transmission mechanism, driving the first rotating shaft to rotate; when the first rotating shaft rotates, the pair of first support arms mounted thereon are driven to rotate, and the three second support arms connected to the other ends of the first support arms through the second rotating shaft are driven to rotate; when the three second support arms rotate, the lower part of the support leg connected to the other ends of the three second support arms through the third rotating shaft is driven to rotate. Since the upper part of the support leg is connected to the upper part of a pair of ear plates through a connecting shaft, when the lower part of the support leg is subjected to force, the support leg can rotate relative to the connecting shaft, and extend outward relative to the base to be in an inclined state or retract to a vertical state, so as to realize the function of locking or unlocking the platform body.

[0151] Furthermore, in order to prevent the rotary drive from being damaged, the leg drive assembly of the present invention further includes a torque compensation mechanism, such as Figure 21-Figure 27 As shown, the torque compensation mechanism includes: a torque arm 202 arranged parallel to the first ear plate (i.e., the ear plate for mounting one side of the motor) of a pair of ear plates, one end of which (i.e., Fig. 22 The first through hole is opened at the upper part of the Fig. 22 A second through hole is opened in the lower part of the torque arm 202; a bolt 216 for passing through the first through hole of the torque arm 202 has an optical axis section for passing through the first through hole of the torque arm and a threaded section for threaded connection with the fixing sleeve on the first ear plate; a flexible connecting member sleeved outside the optical axis section of the bolt 216 and in the first through hole is a circular buffer sleeve 206 made of elastic material; a buffer member located between the head of the bolt 216 and the buffer sleeve is a circular buffer cover plate 207; wherein the first rotating shaft passes through the second through hole of the torque arm 202 and is rotatably connected to the torque arm.

[0152] During manufacturing, the torque arm can be made of a plate that is narrow at the top and wide at the bottom with a smooth transition, with a first through hole and a second through hole respectively opened at the top and bottom, and the first through hole located at the top is a long slot hole. The upper part of the torque arm is connected to the cylindrical fixing sleeve on the first ear plate by a bolt passing through the first through hole, and the lower part is connected to the lower part of the first ear plate by the extended end of the first rotating shaft passing through the second through hole.

[0153] In addition, a third through hole is provided between the first through hole and the second through hole on the torque arm, and the third through hole is used to allow the motor output shaft to pass through, so as to fix the driving sprocket 208 (the driving sprocket is located between the first ear plate and the torque arm) on the extended end of the motor output shaft through components such as a flat head screw 210. In addition, at least two small holes ( Fig.28 Three small holes are shown in the figure) so that the motor can be fixed to the torque arm by screws 215 passing through the small holes to prevent the relative position of the motor output shaft passing through the torque arm from changing.

[0154] During assembly, the gasket, buffer cover plate and buffer sleeve are successively mounted on the bolt 216, so that the buffer sleeve is located on the optical axis section (or the optical axis section and the threaded section) of the bolt 216, and the bolt is passed through the first through hole of the torque arm 202, and the thread at the end of the bolt is threadedly connected with the fixing sleeve on the first ear plate, so as to fix the upper part of the torque arm on the ear plate. The second through hole of the torque arm is rotatably connected to the extended end of the first rotating shaft through the bearing 212, the bearing pressure cover 214 and the shaft end cover 213.

[0155] Since the motor output shaft is connected to the torque arm through the buffer sleeve, when the motor changes position relative to the torque arm, this change can cause the buffer sleeve to slide in the long slot hole of the torque arm to compensate for the position deviation of the motor, and the impact force generated by the movement can be buffered by the buffer sleeve, so that the actual load will not be transmitted from the torque arm to the motor, preventing the motor from overloading, effectively avoiding motor damage, and extending the overall service life of the equipment.

[0156] In addition to the above-mentioned movable leg assembly and leg drive assembly, the movable leg mechanism of the present invention also includes a position detection assembly, which detects the extended or retracted position of the leg and sends the detection result to the control device of the cantilever lifting stage, so that the control device controls the angle of rotation of the leg by the leg drive assembly according to the detection result.

[0157] The position detection assembly may be a mechanical travel switch, a micro switch, a photoelectric sensor or an encoder. In the following, only the structure of the mechanical travel switch is described.

[0158] like Figure 23-Figure 26 , Fig.32 , Fig.34 As shown, the present invention is provided with a backing plate 2110 (see FIG. 21 ) on the outer side of one end of the first rotating shaft which is away from the driven sprocket and extends out of the second ear plate of the pair of ear plates of the base. Fig.34), and the magnet is fixed to the first rotating shaft by means of screws 2108 passing through the magnet 2109, the pad 2110 and the first rotating shaft 2113, so that the magnet can rotate with the first rotating shaft. Accordingly, a sensor fixing plate 204 is installed on the outer side of the second ear plate, and two mechanical travel switches 203 are installed on the sensor fixing plate 204, one of which is horizontally arranged and the other is vertically arranged (such as Fig.25 ), and is used together with a magnet to respectively detect the two extreme positions in the horizontal and vertical directions when the magnet rotates along with the first rotating shaft.

[0159] When the first rotating shaft rotates in the first direction (clockwise or counterclockwise) driven by the motor, the legs are driven to rotate relative to the base and extend outward, and the magnet also rotates with the first rotating shaft. Fig.32 When the first rotating shaft is driven by the motor to rotate in a direction opposite to the first direction, the supporting leg is driven to rotate relative to the base and retract inward to separate from the supporting seat, and the magnet also rotates with the first rotating shaft. When the first rotating shaft rotates to the direction opposite to the first direction, the supporting leg is driven to rotate relative to the base and retract inward to separate from the supporting seat. Figure 2a When the stage is in the position shown, the magnet hits the vertically mounted mechanical travel switch, and the contact of the travel switch is actuated, which can stop the driving mechanism of the leg driving assembly by switching the control circuit, thereby retracting the legs to their original initial positions, so that the stage can be raised or lowered according to performance needs.

[0160] Correspondingly, the support seat 2 matched with the above-mentioned legs has a connection part for connecting to the platform body and a slot for the legs to abut against. During manufacturing, the connection part of the support seat can be a vertical plate, which is vertically fixedly installed on the building structure by welding or bolt connection, etc. A pair of baffles are symmetrically installed on the left and right sides of the vertical plate, and a reinforcing plate is arranged in the middle of the vertical plate, which is perpendicular and fixedly connected to the pair of baffles and the vertical plate respectively. The upper space surrounded by the reinforcing plate, the pair of baffles, and the vertical plate forms a cavity for accommodating the legs after extension, and the lower ends of the legs can abut against the upper surface of the reinforcing plate.

[0161] It should be noted that when the structure in which the movable leg mechanism is installed on the building structure and the support base is installed on the platform body is adopted, each mechanism can still adopt the structure of the above mechanism, but the installation direction of the movable leg assembly on the building structure is opposite to the above, that is, Figure 3 As shown, the connecting shaft as the rotation fulcrum is located at the bottom and the first rotation shaft is located at the top. The lower space surrounded by the reinforcing plate, a pair of baffles and the vertical plate in the support seat 2 forms a cavity for accommodating the extended legs, and the upper ends of the legs that rotate and extend outward can abut against the lower surface of the reinforcing plate.

[0162] It can be seen that the support locking device of the present invention uses a very low-power motor to drive the legs to extend or retract, so as to achieve the support and locking effect on the platform weighing more than ten tons or dozens of tons after docking, which greatly reduces the equipment cost, and has a more compact structure and high reliability of component assembly.

[0163] Among them, the cantilever lifting stage of the present invention adopts a pair of tracks on one side to support a platform 1 with a triangular longitudinal section. The platform 1 is fixedly connected into a truss structure by multiple steel sections extending in the horizontal, longitudinal and inclined directions. The two rigid chains of the driving device 9 are respectively connected to the two sides of the lower end of the platform through two sets of jacking compensation mechanisms. The two rigid chains drive the platform up and down through the jacking compensation mechanism under the drive of the motor. When the platform is docked in place, the docking position of the platform is locked by the mutual abutment of the movable leg mechanism 2 and the support seat 3.

[0164] In order to prevent the platform from lowering due to the extension of the movable leg mechanism 2 to abut against the support seat 3 during the docking process, which may cause the rigid chain to drop too much and be damaged, the present invention arranges a jacking compensation device between the platform 1 and the rigid chain of the driving device 9. The jacking compensation device has two sets of jacking compensation mechanisms 26, each set of which is connected to one side of the lower end of the platform through a movable plate and to a rigid chain on the corresponding side of the driving device through a fixed plate, and under the action of external force, the movable plate and the fixed plate can produce relative displacement in the vertical direction.

[0165] Specifically, the lifting compensation device of the present invention includes two sets of lifting compensation mechanisms 26, each set of lifting compensation mechanisms 26 can be used as follows: Figure 38-Figure 41 The structure shown includes: a movable plate 263 connected to one side of the lower end of the platform; a fixed plate 265 connected to a rigid chain of the platform driving device, which is arranged parallel to the movable plate and located below the movable plate; a pair of guide components respectively connected to the fixed plate and the movable plate and can cause the movable plate and the fixed plate to produce relative displacement under the action of external force. In addition, the lifting compensation mechanism also includes one or more contact plates 264 (two contact plates in the figure) installed between the movable plate and the fixed plate, and the contact plate can be connected to the movable plate or the fixed plate by screws.

[0166] Each guide assembly includes: a guide shaft 262 that passes through a movable plate 263 at the top and a fixed plate 265 at the bottom; a limit plate 261 that is fixedly connected to the top of the guide shaft; and a shaft positioning plate 266 that is fixedly connected to the bottom of the guide shaft. In addition, each guide assembly also includes a shaft sleeve 268 installed in a guide through hole of the movable plate for the guide shaft to pass through.

[0167] During manufacture, the movable plate 263 may be manufactured as follows: Fig.40The flat hexagonal plate shown in the figure can also be a plate of other shapes. When a flat hexagonal movable plate is used, one or more pairs of guide through holes are symmetrically opened on both sides of the movable plate along the longer central axis of the movable plate (preferably, as Fig.40 As shown, a pair of guide holes are provided, a sleeve 268 is placed in each guide hole, each guide shaft passes through a corresponding sleeve and can move up and down, and the sleeve is a self-lubricating sleeve. In order to prevent the sleeve from slipping out of the guide hole, the sleeve can be glued in the guide hole, for example, the sleeve can be fixed in the guide hole by anaerobic glue. Of course, other methods can also be used to fix the sleeve in the guide hole.

[0168] In addition, multiple pairs of connecting through holes are provided between a pair of guide through holes of the movable plate. The multiple pairs of connecting through holes are symmetrically provided on both sides of the shorter central axis of the movable plate. Fig.40 As shown, four pairs of connecting through holes are provided, wherein the sizes of the two pairs of connecting through holes located on the outermost sides are slightly larger than the sizes of the two pairs of connecting through holes located in the middle. Of course, the sizes of the four pairs of connecting through holes can also be the same. The movable plate is connected to the lower end of the corresponding side of the platform body by correspondingly passing bolts through the two pairs of connecting through holes on the outermost sides. Accordingly, receiving grooves 1a (such as Fig.37 As shown), each receiving groove is provided with two corresponding through holes ( Fig.37 The through holes in the receiving grooves are not shown in the figure), and the four through holes in the two receiving grooves correspond to the positions of the two outermost pairs of connecting through holes opened on the movable plate.

[0169] Like the movable plate, the fixed plate 265 can be Fig.41 The flat hexagonal plate shown in the figure may also be a plate of other shapes. The external dimensions of the fixed plate may be the same as those of the movable plate. The fixed plate is also provided with guide holes and connecting holes. The guide holes and connecting holes may correspond to the positions and numbers of the guide holes and connecting holes on the movable plate. In addition, the positions and numbers of the connecting holes may not correspond to those on the movable plate. The upper end of the guide shaft passes through the guide hole of the movable plate, and the lower end passes through the guide hole of the fixed plate. Bolts are correspondingly inserted into the two pairs of connecting holes located on the outside to connect the fixed plate to the rigid chain.

[0170] The top of the guide shaft is exposed on the movable plate, and a limit plate 261 is fixed at the top by bolts 269. The limit plate is circular, and its outer diameter is larger than the diameter of the guide hole. The bottom of the guide shaft is flush with the fixed plate, and a shaft positioning plate 267 is placed at its bottom. The shaft positioning plate is fixedly connected to the guide shaft by multiple bolts. In addition, the shaft positioning plate is also connected to the fixed plate by multiple bolts. Fig.41 As shown, a plurality of connection holes (four in the figure) are arranged around each guide through hole of the fixing plate.

[0171] Since the movable plate can move up and down relative to the fixed plate along the guide shaft, in order to prevent the movable plate from hitting the fixed plate during movement and causing a large rigid impact force on the fixed plate, a contact plate 264 is arranged between the fixed plate and the movable plate. Fig.39 As shown, the present invention arranges two contact plates between the two, the upper contact plate is connected to the movable plate, and the lower contact plate is connected to the fixed plate. When connecting, two pairs of countersunk screws can be used to pass through the two pairs of connecting through holes in the middle of the upper contact plate and the movable plate to connect the upper contact plate and the movable plate together, and similarly, two pairs of countersunk screws can be used to pass through the two pairs of connecting through holes in the middle of the lower contact plate and the fixed plate to connect the lower contact plate and the fixed plate together.

[0172] It should be noted that, in addition to the bolt connection between the above-mentioned plates of the present invention, the method of connecting each plate with the corresponding component can also be determined according to actual needs. Of course, the number and position of the bolts when bolting can also be adjusted according to needs.

[0173] To sum up, the jacking compensation device of the present invention has each jacking compensation mechanism with simple and compact structure, small size, small space occupation, convenient installation and maintenance, easy manufacturing and low cost. The platform body is connected to the rigid chain by two sets of jacking compensation mechanisms, which can prevent the platform body from falling and damaging the rigid chain, thereby greatly improving the service life and operation safety of the stage.

[0174] Although the present invention has been described in detail above, the present invention is not limited thereto. Those skilled in the art may make modifications based on the principles of the present invention. Therefore, all modifications made based on the principles of the present invention should be understood to fall within the protection scope of the present invention.

Claims

1. A cantilever lifting stage, characterized in that: include: Taiwan body; A supporting and guiding device for supporting the platform and enabling the platform to be lifted and lowered in a vertical direction; A support locking device for locking the platform body after the platform body is raised or lowered to a desired position; A platform driving device for driving the platform to move up and down along the supporting guide device; A lifting compensation device for preventing damage to the platform driving device during the process of the support locking device locking the platform; A control device for connecting to each device and controlling the corresponding actions of each device; The support locking device comprises: a plurality of pairs of movable leg mechanisms installed on both sides of the platform, and a plurality of pairs of support seats installed on both sides of the building structure; or, a plurality of pairs of movable leg mechanisms installed on both sides of the building structure for accommodating the cantilever lifting stage, and a plurality of pairs of support seats installed on both sides of the platform; the plurality of pairs of movable leg mechanisms are used in pairs with the plurality of pairs of support seats, and the legs of the movable leg mechanisms can rotate relative to the platform or the building structure and extend outward or inward of the platform so as to abut against the corresponding support seats and lock the platform; Among them, the jacking compensation device includes two sets of jacking compensation mechanisms, each set of jacking compensation mechanisms includes: a movable plate used to be connected to one side of the lower end of the platform; a fixed plate used to be connected to a rigid chain of the platform driving device, which is arranged parallel to the movable plate and located below the movable plate; a pair of guide components respectively connected to the fixed plate and the movable plate and can cause the movable plate and the fixed plate to produce relative displacement under the action of external force.

2. The cantilever lifting stage according to claim 1, characterized in that: The supporting and guiding device comprises: A supporting structure installed on a building structure with one side being the stage side and the other side being the auditorium side; a pair of rails extending in parallel in a vertical direction and mounted on the stage side of the supporting structure; A guide connection mechanism is provided for rollingly connecting a platform body extending toward the auditorium side of the supporting structure to a pair of tracks.

3. The cantilever lifting stage according to claim 2, characterized in that: The track is an H-shaped steel, and the guide connection mechanism includes: a main wheel mechanism installed on the platform and used to contact the flange of the track; and a secondary wheel mechanism installed on the platform and used to contact the web of the track.

4. The cantilever lifting stage according to claim 3, characterized in that: The guide connection mechanism also includes a protection structure for preventing the platform from overturning relative to the track due to a malfunction.

5. The cantilever lifting stage according to claim 4, characterized in that: The movable leg mechanism comprises: A movable leg assembly, comprising a base for connecting to the platform or the building structure and the leg, wherein one end of the leg is rotatably connected to the base and the other end is hinged to the base; The outrigger driving assembly is connected to the outrigger and is used to drive the outrigger to rotate relative to the base to extend or retract.

6. The cantilever lifting stage according to claim 5, characterized in that: The movable leg mechanism also includes a position detection assembly, which detects the extension or retraction position of the leg and sends the detection result to the control device, so that the control device controls the leg drive assembly to drive the leg to rotate according to the detection result.

7. The cantilever lifting stage according to claim 6, characterized in that: When the outrigger drive assembly adopts an electric drive mechanism, it also includes a torque compensation mechanism for preventing damage to the rotary drive.

8. The cantilever lifting stage according to claim 1, characterized in that: The guide assembly comprises: A guide shaft having an upper portion passing through the movable plate and a lower portion passing through the fixed plate; A limit plate fixedly connected to the top end of the guide shaft; A shaft locating plate fixedly connected to the bottom end of the guide shaft.

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