Embedded telescopic large cantilever channel system

Abstract

The invention discloses an embedded telescopic large-cantilever channel system which comprises a fixed frame and a movable frame, the movable frame can move and stretch out and draw back along the interior of the fixed frame, a rail is arranged in the fixed frame, and a plurality of supporting travelling cranes and guide wheel assemblies matched with the rail are arranged on the movable frame. The movable frame is connected with a driving transmission device for driving the movable frame to move, and a locking device is arranged between the fixed frame and the movable frame. The method can be applied to pedestrian paths between super high-rise buildings and long-distance buildings and outer edge working platform expansion of the super high-rise buildings. The channel system can provide normal functions in the extending state, the channel is embedded into the building structure in the retracting state, the overall structural aesthetic feeling of the building is not affected, the channel structure does not need to bear limit loads, the design is light and convenient, and the structure is compact.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and more particularly to an embedded retractable large cantilever channel system. Background Art

[0002] To facilitate movement between tall, long-distance buildings, elevated walkways are constructed between them. These walkways, typically constructed of fixed steel structures, provide inter-building mobility but also compromise the overall aesthetics of the building structure and occupy external space. Furthermore, these walkways must withstand extreme loads, increasing construction costs.

[0003] At the same time, some super-high-rise buildings require working surfaces away from the main structure. For example, in order to meet environmental protection requirements, some hospital smoke exhaust systems need to concentrate exhaust smoke in super-high-rise buildings and direct it to a location away from the main structure. To meet these requirements, fixed-structure high-altitude walkways are generally constructed. While this meets environmental protection requirements, the extended walkways not only detract from the overall aesthetics of the building but also pose certain safety risks. Summary of the Invention

[0004] The present invention provides an embedded retractable large cantilever channel system, which can be retracted and controlled as needed, solving the problem that buildings need high-rise channels or aerial work platforms but cannot occupy the high-altitude outer edge space for a long time and cannot destroy the overall beauty of the building.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: an embedded retractable large cantilever channel system, comprising a fixed frame and a movable frame, the movable frame can move and retract along the interior of the fixed frame, a track is provided in the fixed frame, and the movable frame is provided with a plurality of supporting cranes and guide wheel assemblies that cooperate with the track, the movable frame is connected to a driving transmission device that drives its movement, and a locking device is provided between the fixed frame and the movable frame.

[0006] The fixed frame is a frame structure made of welded rectangular tubes. The main beams at the four corners are made of large-section rectangular tubes, and a set of C-type track systems are installed on the sides. The embedded movable frame is mainly welded from I-beams, and the main beams at the four corners are provided with mounting interfaces for supporting cranes and guide wheel assemblies. The supporting crane and guide wheel assemblies engage with the C-type track to realize vertical tension, compression and guiding functions, and the overall structure is compact. The operation of the drive transmission device can control the telescopic movement of the movable frame. When needed, the movable frame extends. The large cantilevered end can provide a high-altitude passage for pedestrians, and can also be used as an aerial work platform (including an equipment maintenance platform). When not needed, the movable frame shrinks. When the channel system is retracted, it does not occupy the outer edge space of the building, nor does it damage the overall beauty of the building, reducing safety hazards. In the fully extended and fully closed states, the locking device locks the posture of the movable frame to provide safety protection.

[0007] Furthermore, the drive transmission device includes a rack connected to the movable frame, a motor assembly mounted on the fixed frame, and a drive gear meshing with the rack. The rack is fixed to the movable frame via a rack mounting base. When the motor assembly is activated, the gear rotates, and the gear meshes with the rack to drive the movable frame.

[0008] Furthermore, the fixed frame is equipped with a reduction motor and a transmission box, with a universal coupling connecting the reduction motor and transmission box. The drive gear is mounted on the transmission box. The reduction motor transmits driving force to the transmission box via the universal coupling between the reduction motor and the transmission box, effectively transmitting torque while allowing for a certain degree of angular offset and axial displacement, adapting to deformation of the steel structure frame and reducing assembly precision requirements.

[0009] Furthermore, the transmission box includes a mounting base fixed to the fixed frame. The mounting base is connected to a gear box via a four-bar linkage, and the drive gear is mounted on the gear box. The four-bar linkage (composed of four rigid rods connected by hinges) achieves force transmission, resulting in a simple structure and flexible functions.

[0010] Furthermore, the gear box is provided with a pressure wheel that cooperates with the rack and presses tightly. During the movement, the pressure wheel always presses on the upper surface of the rack, so that the system can adapt to structural deformation and keep the driving gear always tightly engaged with the rack.

[0011] Furthermore, a maximum of four supporting cranes and guide wheel assemblies are arranged on the same vertical surface of the movable frame, with the supporting cranes being densely arranged near the junction of the movable and fixed frames and sparsely arranged opposite the movable and fixed frames. The movable frame is more flexible than the fixed frame, so to achieve uniform load distribution, multiple sets of supporting cranes and guide wheel assemblies are positioned along the travel direction, with a dense arrangement at the rear and a dispersed arrangement at the front, matching the structural rigidity and improving the reliability and stability of telescopic operation.

[0012] Furthermore, the supporting trolley includes a mounting flange connected to an axle, with support wheels mounted on the outer surface of the axle. The mounting flange is equipped with several locking members that connect to the movable frame. The mounting flange and the movable frame are secured together using locking members to achieve the installation of the supporting trolley. The support wheels roll in conjunction with the tracks within the fixed frame, supporting the load of the movable frame and distributing pressure to prevent localized wear on the tracks. The rolling action reduces friction, ensuring smooth movement and cooperating with the rolling wheels to prevent tipping or vibration, ensuring stable operation.

[0013] Furthermore, an eccentric bushing is connected between the mounting flange and the wheel axle. The mounting flange is provided with several arcuate slots for adjusting the locking member. Mounting holes are provided at corresponding locations on the movable frame for mounting the support crane, and the mounting flange engages with these holes for securement. By rotating the eccentric bushing, the height of the support crane at the installation location can be fine-tuned to accommodate structural deformation and machining errors. The arcuate slots in the mounting flange accommodate the rotational adjustment of the eccentric bushing.

[0014] Furthermore, the guide wheel assembly includes a frame and a guide wheel. The guide wheel and the frame are connected by a guide wheel shaft, and the frame is provided with a plurality of adjustment bolts. The guide wheel is rotatably mounted on the frame via the guide wheel shaft, and the guide wheel moves in conjunction with a track within the fixed frame. The frame is fixedly connected to the movable frame, and the distance between the guide wheel and the track surface on the fixed frame is adjusted using adjustment bolts provided on the frame to adapt to deformation and processing errors of the adaptive structure.

[0015] Furthermore, the locking device comprises an electric push rod and a lock hole, mounted on the fixed frame and movable frame, respectively. The telescopic end of the push rod is connected to a latch that mates with the lock hole, and the lock hole is positioned at the fully open / closed locking position corresponding to the movable frame. The locking device comprises an electric push rod, latch, and lock hole. The push rod is mounted on the fixed frame, and the lock hole is positioned at the fully open / closed locking position corresponding to the movable frame. When the movable frame is moved into position, the push rod pushes the latch into the lock hole, locking the movable frame in place and ensuring system security.

[0016] In summary, the present invention designs an embedded retractable large cantilever channel system suitable for super high-rise buildings, which adopts a combination of steel structure and mechanical transmission to achieve retraction. It can be applied to pedestrian passages between super high-rise and long-distance buildings, as well as the expansion of outer edge work platforms of super high-rise buildings. The channel system can provide normal functions when it is in the extended state. When it is in the retracted state, the channel is embedded into the interior of the building structure, which does not affect the overall structural beauty of the building. The channel structure does not need to bear the ultimate load, and the design is light and convenient, with a compact structure. When needed, mechanical equipment drives the steel structure channel to extend, and the large cantilevered protruding end can provide pedestrians with a high-altitude passage, and can also be used as an aerial work platform (including an equipment maintenance platform) to meet design requirements. When the channel system is retracted, it does not occupy the outer edge space of the building, nor does it damage the overall beauty of the building, reducing safety hazards. Compared with the prior art, the present invention has the following beneficial effects: 1. The C-type track structure and multi-point support with the same cross-section have strong tensile and compressive resistance and meet the load-bearing characteristics of large cantilever structures.

[0017] 2. The rigid outer and flexible inner frame structure matches the multi-point arrangement of the supporting carriage with dense tail and sparse head, making the wheel-rail load distribution more uniform, reducing the size of the supporting carriage, and having a compact structure and smooth operation.

[0018] 3. The drive system uses universal couplings, four-bar linkages, pressure wheels and other mechanisms, which can coordinate and match and adapt to the deformation of the steel structure frame to ensure the safe and stable operation of the movable frame.

[0019] 4. The design of the supporting crane and guide wheel assembly, eccentric bushing and adjustment bolts can eliminate machining and assembly errors, reduce the difficulty of on-site construction, and ensure wheel-rail load uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a diagram of the retracted state of the high-altitude channel according to an embodiment of the present invention; Figure 2 This is a diagram of the extended state of the high-altitude channel according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of a supporting vehicle in an embodiment of the present invention; Figure 4 A cross-sectional view of a guide wheel assembly and a drive transmission device in an embodiment of the present invention; Figure 5 This is a schematic structural diagram of a driving transmission device in an embodiment of the present invention; Figure 6 Schematic diagram of the transmission box structure in the driving transmission device in an embodiment of the present invention; Figure 7 This is a schematic diagram of a supporting structure for a crane in an embodiment of the present invention; Figure 8 This is a structural schematic diagram of a guide wheel assembly in an embodiment of the present invention; Figure 9 Schematic diagram of the locking device mechanism in an embodiment of the present invention.

[0021] Attachments: 1. Fixed frame; 2. Movable frame; 3. Driving transmission device; 3.1. Reducer motor; 3.2. Universal coupling; 3.3. Transmission box; 3.4. Rack; 3.5. Rack mounting seat; 3.3.1. Mounting seat; 3.3.2. Four-bar linkage; 3.3.3. Driving gear; 3.3.4. Pressure wheel; 3.3.5. Gear box; 4. Support crane; 4.1. Support wheel; 4.2. Wheel axle; 4.3. Eccentric bushing; 4.4. Mounting flange; 5. Guide wheel assembly; 5.1. Guide wheel axle; 5.2. Guide wheel; 5.3. Adjusting bolt; 5.4. Frame; 6. Locking device; 6.1. Electric push rod; 6.2. Latch; 6.3. Lock hole. DETAILED DESCRIPTION

[0022] The following is combined with Figures 1 to 9 The specific implementation of the embedded retractable large cantilever channel system of the present invention is further described in detail.

[0023] An embedded retractable large cantilever channel system, the main structure of which is as follows: Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the mobile frame 2 consists of a fixed frame 1, a movable frame 2, a drive transmission 3, a support trolley 4, a guide wheel assembly 5, and a locking device 6. The movable frame 2 is positioned within the fixed frame 1. The support trolley 4 and guide wheel assembly 5 are arranged within the track inside the fixed frame 1, providing support and guidance for the movement of the movable frame 2. The drive transmission 3 is mounted below the movable frame 2 to power its movement. The locking device 6 locks the movable frame 2 in its fully extended and fully closed positions, providing safety.

[0024] The fixed frame 1 is a frame structure constructed from welded rectangular tubes. The main beams at each corner utilize large-section rectangular tubes, and a C-track system is installed on each side. The embedded movable frame 2 is primarily constructed from welded I-beams, with mounting interfaces for support cranes and guide wheels installed on the main beams at each corner. Four sets of support cranes and guide wheels engage with the C-tracks on the same cross-section to achieve vertical tension, compression, and guidance, resulting in a compact overall structure. The movable frame is more flexible than the fixed frame. To achieve uniform load distribution, multiple sets of support cranes and guide wheels are installed in the operating direction (densely arranged at the rear and dispersed at the front to match the structural rigidity), improving the reliability and stability of the telescopic operation.

[0025] The structure of the driving transmission device 3 is as follows: Figure 5 As shown, it consists of a reduction motor 3.1, a universal coupling 3.2, a transmission box 3.3, a rack 3.4 and a rack mounting base 3.5. The structure of the transmission box 3.3 is as shown above. Figure 6 The gearbox 3.3.5 consists of a mounting base 3.3.1, a four-bar linkage 3.3.2, a drive gear 3.3.3, a pressure roller 3.3.4, and a gearbox 3.3.5. The reduction motor 3.1 and transmission box 3.3 are mounted on the fixed frame 1. The reduction motor 3.1 transmits its driving force to the transmission box 3.3 via a universal joint 3.2. The rack 3.4 and rack mounting base 3.5 are mounted on the movable frame 2. The gear 3.3.3 on the transmission box 3.3 meshes with the rack 3.4 to drive the movable frame 2.

[0026] like Figure 6 As shown, the transmission box 3.3 is mounted on the fixed frame 1 via the mounting base 3.3.1, and is connected to the gear box 3.3.5 via a four-bar linkage 3.3.2. In addition, the pressure wheel 3.3.4 is always pressed on the upper surface of the rack 3.4, so that the system can adapt to structural deformation and keep the gear 3.3.3 tightly engaged with the rack 3.4.

[0027] The structure of supporting crane 4 is as follows Figure 7As shown, it consists of a support wheel 4.1, an axle 4.2, an eccentric bushing 4.3, and a mounting flange 4.4. A maximum of four supporting cranes 4 are arranged on the same vertical surface of the movable frame 2. The supporting cranes 4 are densely arranged near the junction of the movable frame 2 and the fixed frame 1, and sparsely arranged otherwise (for example, a movable frame with a travel range of 17m and a length of 23m has a wheelbase of 1.5m at the end, gradually increasing to 6m at the extended section), to ensure safe operation of the system. Mounting holes are provided at corresponding locations on the movable frame 2. The eccentric bushing 4.3 (with an eccentricity of 5mm and an adjustable height range of ±5mm) on the outside of the axle 4.2 of the supporting crane 4 fits into the mounting hole. By rotating the eccentric bushing 4.3, the height of the supporting crane 4 at the installation location can be fine-tuned to accommodate structural deformation and machining errors.

[0028] The structure of the guide wheel assembly 5 is as follows: Figure 8 As shown, the system consists of a guide wheel shaft 5.1, guide wheels 5.2, adjustment bolts 5.3, and a carriage 5.4. Up to four guide wheel assemblies 5 are arranged on the same vertical surface of the movable frame 2, providing lateral guidance for system operation. Adjustment bolts 5.3 adjust the distance between the guide wheel assembly 5.2 and the track surface on the fixed frame 1, adapting to structural deformation and machining errors.

[0029] The locking device 6 is structured as follows Figure 9 As shown, the system consists of an electric push rod 6.1, a latch 6.2, and a lock hole 6.3. The electric push rod 6.1 is mounted on the fixed frame 1, and the lock hole 6.3 is located at the fully open / fully closed locking position of the movable frame 2. When the movable frame 2 is moved into position, the electric push rod 6.1 pushes the latch 6.2 into the lock hole 6.3, locking the movable frame 2 in place and ensuring system security.

[0030] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An embedded retractable large cantilever channel system, characterized by: It includes a fixed frame and a movable frame. The movable frame can move and retract along the inside of the fixed frame. A track is provided in the fixed frame. The movable frame is provided with a plurality of supporting cranes and guide wheel assemblies that cooperate with the track. The movable frame is connected to a driving transmission device that drives its movement. A locking device is provided between the fixed frame and the movable frame.

2. The embedded retractable large cantilever channel system according to claim 1, characterized in that: The driving transmission device includes a rack connected to the movable frame, a motor assembly is installed on the fixed frame, and the motor assembly is connected to a driving gear meshing with the rack.

3. The embedded retractable large cantilever channel system according to claim 2, characterized in that: A reduction motor and a transmission box are provided on the fixed frame. A universal coupling is connected between the reduction motor and the transmission box. The driving gear is installed on the transmission box.

4. The embedded retractable large cantilever channel system according to claim 3, characterized in that: The transmission box includes a mounting base fixed to the fixed frame, the mounting base is connected to a gear box via a four-bar linkage, and the driving gear is mounted on the gear box.

5. The embedded retractable large cantilever channel system according to claim 4, characterized in that: The gear box is provided with a pressing wheel which cooperates with the rack and presses tightly.

6. The embedded retractable large cantilever channel system according to claim 1, characterized in that: A maximum of four supporting cranes and guide wheel assemblies are arranged on the same vertical surface of the movable frame. The supporting cranes are densely arranged near the junction of the movable frame and the fixed frame, and sparsely arranged otherwise.

7. The embedded retractable large cantilever channel system according to claim 1, characterized in that: The supporting crane comprises a mounting flange, the mounting flange is connected to a wheel axle, a supporting wheel is provided on the outer sleeve of the wheel axle, and a plurality of locking members connected to the movable frame are provided on the mounting flange.

8. The embedded retractable large cantilever channel system according to claim 7, characterized in that: An eccentric sleeve is connected between the mounting flange and the wheel axle, and a plurality of arc-shaped grooves for adjusting the locking member are provided on the mounting flange.

9. The embedded retractable large cantilever channel system according to claim 1, characterized in that: The guide wheel assembly includes a vehicle frame and a guide wheel. The guide wheel and the vehicle frame are connected via a guide wheel shaft. A plurality of adjustment bolts are provided on the vehicle frame.

10. The embedded retractable large cantilever channel system according to claim 1, characterized in that: The locking device includes an electric push rod and a lock hole respectively installed on the fixed frame and the movable frame. The telescopic end of the electric push rod is connected to a pin adapted to the lock hole. The lock hole is arranged at the fully open and fully closed locking position corresponding to the movable frame.

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