Rotary platform for rotating and positioning heavy carrier

Abstract

The invention provides a revolving platform for rotating and positioning a heavy carrier, which comprises a bearing steel structure, a center positioning mechanism, a revolving positioning mechanism, a plurality of wheel assemblies, an annular heavy rail and a driving mechanism, the middle part of the bearing steel structure is connected with a civil foundation through the center positioning mechanism, and the wheel assemblies are connected with the annular heavy rail through the driving mechanism. The annular heavy rail is arranged in the circumferential direction of the bottom of the bearing steel structure, the bearing steel structure is connected to the annular heavy rail through the wheel assembly, and the rotary positioning mechanism is arranged on the outer side of the bearing steel structure and used for enabling the bearing steel structure to rotate and be fixed within a certain angle range. The bearing steel structure is adopted for bearing a heavy carrier, the wheel set is adopted for stress bearing at the bottom of the bearing steel structure, the center positioning mechanism is adopted for axial positioning in the middle of the bearing steel structure, meanwhile, the rotation positioning mechanism is designed for limiting protection, and it is guaranteed that the rotation platform has high bearing capacity and stability; the service life of the revolving platform is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of large-scale mechanical equipment, and particularly relates to a slewing platform for rotating and positioning a heavy carrier. Background Art

[0002] The movable heavy-duty section is an important bearing mechanism for a certain research test. During the test, the movable heavy-duty section needs to rotate a certain angle according to different test requirements to connect with other sections.

[0003] Some slewing platform structures for transportation are disclosed in the prior art, but there are some defects in the transportation of heavy carriers; for example, a high-precision self-centering slewing platform is proposed in Chinese Patent CN215846889U, but the platform structure is too simple and lacks a description of the driving device; a design scheme of a large steam generator slewing platform with a slewing bearing is proposed in Chinese Patent CN112548970A, but this device is not applicable to large-scale equipment above 1000t and is prone to excessive deformation when bearing the load; a high-precision double-worm slewing drive device is proposed in Chinese Patent CN117780862B, which uses worm and worm gear drive, has too small a transmission ratio, and has the problem of difficult braking and deceleration; a garbage truck unloading slewing platform is proposed in Chinese Patent CN202807935U, which uses an inner and outer two-ring circular track arrangement, lacks a positioning and clamping device, and has low reliability; a train shed car slewing platform with a limiting device is proposed in Patent WO2019214376A1. Although this setting can rotate and fix the platform within a certain angle range, for bearing a heavy-duty section, axial positioning is difficult to guarantee, and eccentricity and excessive overturning moment are likely to occur. Summary of the Invention

[0004] The purpose of the present invention is to provide a slewing platform for rotating and positioning a heavy carrier, which can at least solve some of the defects existing in the prior art.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A slewing platform for rotating and positioning a heavy carrier includes a load-bearing steel structure for bearing the heavy carrier, a central positioning mechanism, a slewing positioning mechanism, a wheel assembly, a circular heavy rail, and a driving mechanism for driving the rotation of the load-bearing steel structure. The middle part of the load-bearing steel structure is connected to the civil engineering foundation through the central positioning mechanism. There are multiple wheel assemblies, which are arranged circumferentially along the bottom of the load-bearing steel structure. The load-bearing steel structure is connected to the circular heavy rail through the wheel assemblies. The slewing positioning mechanism is arranged outside the load-bearing steel structure and is used to rotate and fix the load-bearing steel structure within a certain angle range.

[0007] Furthermore, a sectional track for the movement of heavy carriers is laid on the upper surface of the load-bearing steel structure.

[0008] Furthermore, the load-bearing steel structure is assembled by bolting multiple steel structures together, and a rabbet for bearing shear-direction forces is provided on the multiple steel structures.

[0009] Furthermore, the driving mechanism includes a driving assembly and a gear disk. The driving assembly includes a driving motor, a speed reducer, and a driving pinion. The driving pinion is connected to the movable end of the driving motor through the speed reducer. The gear disk is connected to the load-bearing steel structure, and the driving pinion is meshed and connected with the gear disk.

[0010] Furthermore, there are two groups of the driving assemblies, symmetrically arranged on both sides of the load-bearing steel structure.

[0011] Furthermore, the central positioning mechanism includes a central centering shaft, an upper bearing seat, a bottom bearing seat, an upper bearing bush, and a lower bearing bush. The upper bearing seat is bolted to the load-bearing steel structure. The bottom bearing seat is fixed to the civil engineering foundation. The upper bearing bush is connected inside the upper bearing seat. The lower bearing bush is connected inside the bottom bearing seat. The central centering shaft is connected through and between the upper bearing bush and the lower bearing bush.

[0012] Furthermore, the rotary positioning mechanism includes a stop block, a blocking and limiting device, and a clamping and positioning assembly. The stop block is fixed outside the load-bearing steel structure. The blocking and limiting device and the clamping and positioning assembly are arranged around the load-bearing steel structure corresponding to the stop block. After the load-bearing steel structure rotates a certain angle, the stop block is clamped and fixed by the blocking and limiting device and the clamping and positioning assembly.

[0013] Furthermore, the clamping and positioning assembly includes a base, an electro-hydraulic push rod, a clamping connecting rod, and a spherical plain bearing. The electro-hydraulic push rod is fixedly connected to the base. The movable end of the electro-hydraulic push rod forms a rotational pair connection with the clamping connecting rod through the spherical plain bearing. The clamping connecting rod forms a rotational pair connection with the base through a main pin shaft.

[0014] Furthermore, there are two groups of the rotary positioning mechanisms, distributed on both sides of the load-bearing steel structure.

[0015] Furthermore, the wheel assembly includes a wheel, a load-bearing beam, an angular bearing housing, a spherical roller bearing, an end cover, and a wheel shaft. The wheel shaft is connected to the wheel through a key. Both ends of the wheel shaft are supported on the spherical roller bearings. The spherical roller bearings are welded to the load-bearing beam through the angular bearing housing. The spherical roller bearings are axially positioned through the end cover.

[0016] Compared with the prior art, the beneficial effects of the present invention:

[0017] The slewing platform for the rotation and positioning of heavy carriers provided by the present invention uses a load-bearing steel structure to carry the heavy carrier. The bottom of the load-bearing steel structure is stressed and carried by a wheel set, and the middle of the load-bearing steel structure is axially positioned by a central positioning mechanism. At the same time, a slewing positioning mechanism is designed for limit protection, ensuring that the slewing platform has high load-bearing capacity and stability, and improving the service life of the slewing platform.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings. Description of the Drawings

[0019] Figure 1 is the front view of the slewing platform for the rotation and positioning of heavy carriers of the present invention;

[0020] Figure 2 is the left view of the slewing platform for the rotation and positioning of heavy carriers of the present invention;

[0021] Figure 3 is the top view of the slewing platform for the rotation and positioning of heavy carriers of the present invention;

[0022] Figure 4 is Figure 3 the sectional view along A-A in ;

[0023] Figure 5 is Figure 3 the sectional view along B-B in ;

[0024] Figure 6 is Figure 3 the sectional view along C-C in ;

[0025] Figure 7 is Figure 3 the sectional view along D-D in ;

[0026] Figure 8 is Figure 7 the enlarged view of part Ⅰ in ;

[0027] Figure 9 is Figure 7 the enlarged view of part Ⅱ in ;

[0028] Figure 10 is the structural schematic diagram of the central positioning mechanism in the present invention;

[0029] Figure 11 is the structural schematic diagram of the wheel assembly in the present invention;

[0030] Figure 12 is the installation schematic diagram of the annular heavy rail in the present invention.

[0031] Description of the reference numerals: 1, load-bearing steel structure; 2, rotary positioning mechanism; 3, drive mechanism; 4, annular weight; 5, central positioning mechanism; 6, wheel assembly; 7, embedded steel plate; 8, rail presser; 11, sectional track; 12, spigot; 13, bolt; 14, countersunk head screw; 15, adjusting shim; 21, blocking and limiting device; 22, stop block; 23, clamping and positioning assembly; 231, base; 232, electro-hydraulic push rod; 233, spherical plain bearing; 234, clamping connecting rod; 235, bush; 236, main pin shaft; 31, gear disc; 32, speed reducer; 33, speed reducer bracket; 34, drive motor; 35, drive pinion; 51, upper bearing shell; 52, upper bearing housing; 53, middle centering shaft; 54, lower bearing shell; 55, bottom bearing housing; 61, wheel; 62, load-bearing beam; 63, angular bearing housing; 64, spherical roller bearing; 65, end cover; 66, wheel shaft. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or a contact connection or an integral connection; for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; in the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more.

[0036] Such asFigures 1 to 12 As shown in the figure, this embodiment provides a slewing platform for the rotation and positioning of a heavy carrier, which includes a load-bearing steel structure 1, a central positioning mechanism 5, a slewing positioning mechanism 2, a wheel assembly 6, an annular heavy rail 4, and a driving mechanism 3 for driving the rotation of the load-bearing steel structure 1. The middle part of the load-bearing steel structure 1 is connected to the civil engineering foundation through the central positioning mechanism 5. There are multiple wheel assemblies 6, which are arranged circumferentially along the bottom of the load-bearing steel structure 1. The load-bearing steel structure 1 is connected to the annular heavy rail 4 through the wheel assemblies 6. The slewing positioning mechanism 2 is arranged outside the load-bearing steel structure 1 and is used to rotate the load-bearing steel structure 1 within a certain angle range and fix it. In this embodiment, the load-bearing steel structure 1 is used to carry the heavy carrier section. The load of the heavy carrier section is transmitted to the wheel assemblies 6, and the wheel assemblies 6 run on the annular heavy rail 4. The annular heavy rail 4 bears all the loads, thus ensuring the load-bearing capacity of the slewing platform. And through the setting of the central positioning mechanism 5, the axial positioning of the slewing platform is ensured. When the heavy carrier section is placed on the slewing platform, the central positioning mechanism 5 is used to bear the overturning moment, so that when the heavy carrier section is just placed on the slewing platform and during the rotation of the slewing platform, the main structure of the platform (i.e., the load-bearing steel structure 1) is not eccentric. At the same time, a slewing positioning mechanism 2 is designed for limit protection to improve the stability of the slewing platform during operation.

[0037] Refined implementation manners, such as Figure 7 , Figure 8 and Figure 9 As shown in the figure, the load-bearing steel structure 1 adopts a beam-slab welded structure, which has high strength and can carry heavy carriers. Moreover, the interior of this load-bearing steel structure is hollow, which is convenient for installing other components (such as gear discs, central positioning mechanisms, etc.). For the convenience of transportation, the load-bearing steel structure 1 can be assembled by multiple steel structures through high-strength bolts. For example, in this embodiment, the load-bearing steel structure is divided into a left steel structure, a middle steel structure, and a right steel structure. The left steel structure, the middle steel structure, and the right steel structure are connected by high-strength bolts 13, and the three steel structures bear the force in the shear direction through the rabbets 12 provided on their webs.

[0038] Optionally, for large and heavy heavy carrier sections, it is not convenient to hoist them onto the slewing platform. For this reason, in this embodiment, a section track 11 for the movement of the heavy carrier is laid on the upper surface of the load-bearing steel structure 1. The heavy carrier can travel from one side of the load-bearing steel structure 1 to the middle of the load-bearing steel structure 1 along the section track 11, which is convenient for transporting the heavy carrier onto the slewing platform. Specifically, as Figure 9As shown in the figure, there is an adjusting gasket 15 between the sectional track 11 and the load-bearing steel structure 1, and the three are fixedly connected by countersunk head screws 14. For the way that the heavy load carrier walks onto the slewing platform from one side of the slewing platform, the slewing platform is more likely to overturn. In this embodiment, a central positioning mechanism 5 designed in the middle of the load-bearing steel structure 1 can well solve this problem. When the heavy load carrier sectional just walks onto the slewing platform from one side of the slewing platform, the central positioning mechanism 5 can bear the overturning moment, so as to ensure that the load-bearing steel structure 1 is not eccentric and ensure the stability of the slewing platform.

[0039] As a specific implementation manner, as Figure 10 shown, the central positioning mechanism 5 includes a central centering shaft 53, an upper bearing seat 52, a bottom bearing seat 55, an upper bearing bush 51, and a lower bearing bush 54. The upper bearing seat 52 is bolted to the load-bearing steel structure 1, the bottom bearing seat 55 is fixed to the civil engineering foundation, the upper bearing bush 51 is connected inside the upper bearing seat 52, the lower bearing bush 54 is connected inside the bottom bearing seat 55, and the central centering shaft 53 is connected through and between the upper bearing bush 51 and the lower bearing bush 54. When the heavy load carrier sectional just walks onto the slewing platform, the central centering shaft 53 bears the overturning moment, and by contacting with the upper and lower bearing bushes, it ensures that the platform main structure is not eccentric during the process of the heavy load carrier sectional walking onto the platform and the platform rotating.

[0040] As a specific implementation manner, as Figure 2 、 Figure 3 and Figure 6 shown, the driving mechanism 3 includes a driving assembly and a gear disk 31. The driving assembly includes a driving motor 34, a speed reducer 32, and a driving pinion 35. Among them, the speed reducer 32 is flange-connected to the driving motor 34, and at the same time the speed reducer 32 is connected to the driving pinion 35 through a coupling. The speed reducer 32 is fixed on the civil engineering foundation through a speed reducer support 33. The gear disk 31 is connected to the load-bearing steel structure 1 through studs, and the driving pinion 35 is meshed and connected to the gear disk 31; optionally, there are two groups of driving assemblies, symmetrically arranged on both sides of the load-bearing steel structure 1. When the driving motor 34 is started, the driving motor 34 drives the speed reducer 32, drives the driving pinion 35 to rotate, and the driving pinion 35 drives the gear disk 31 connected to the load-bearing steel structure 1 through meshing, so as to drive the load-bearing steel structure 1 to rotate.

[0041] As a specific implementation manner, as Figure 3As shown, the rotary positioning mechanism 2 includes a stop block 22, a blocking and limiting device 21, and a clamping and positioning assembly 23. The stop block 22 is fixedly connected to the outside of the load-bearing steel structure 1 by screws. The blocking and limiting device 21 and the clamping and positioning assembly 23 are arranged around the load-bearing steel structure 1 corresponding to the stop block 22. When the driving pinion 35 drives the load-bearing steel structure 1 to rotate by a certain angle, at this time, the absolute encoder on the load-bearing steel structure 1 controls the driving motor through the frequency converter to slowly decelerate the load-bearing steel structure 1 until the stop block 22 connected to the load-bearing steel structure 1 contacts the blocking and limiting device 21 and stops. At this time, the clamping and positioning assembly 23 is controlled to press the stop block 22 tightly, so that the stop block 22 is clamped between the blocking and limiting device 21 and the clamping and positioning assembly 23, thereby fixing the load-bearing steel structure 1 to ensure the stability of the connection between the heavy load section on the load-bearing steel structure 1 and other sections.

[0042] In some embodiments, as Figure 4 and Figure 5 shown, the clamping and positioning assembly 23 includes a base 231, an electro-hydraulic push rod 232, a clamping link 234, and a spherical plain bearing 233. The electro-hydraulic push rod 232 is fixedly connected to the base 231. The movable end of the electro-hydraulic push rod 232 forms a rotating pair connection with the clamping link 234 through the spherical plain bearing 233. The clamping link 234 forms a rotating pair connection with the base 231 through a main pin shaft 236, wherein the main pin shaft 236 is connected to the base 231 through a bushing 235. After the stop block 22 contacts the blocking and limiting device 21 and stops, the electro-hydraulic push rod 232 in the clamping and positioning assembly 23 is started to push the clamping link 234 to push against the stop block 22, and the stop block 22 is clamped and fixed between the clamping link 234 and the blocking and limiting device 21.

[0043] Optionally, there are two sets of the rotary positioning mechanisms 2, which are distributed on both sides of the load-bearing steel structure 1. The two sets of rotary positioning mechanisms 2 are used to perform rotary positioning and fixing on the rotational movement of the load-bearing steel structure 1 in two different directions, clockwise or counterclockwise. Therefore, the specific layout positions of the two rotary positioning mechanisms 2 can be designed and determined according to the actual rotation situation of the load-bearing steel structure 1.

[0044] In this embodiment, when the driving mechanism 3 drives the load-bearing steel structure 1 to rotate, the bottom of the load-bearing steel structure 1 travels on the annular heavy rail 4 through the wheel assembly 6. The annular heavy rail 4 can play a guiding role in the rotation of the load-bearing steel structure 1 on the one hand, and can bear all loads on the other hand. Specifically, as Figure 12 shown, the annular heavy rail 4 is tightly pressed and fixed on the embedded steel plate 7 on the civil engineering foundation through the rail clip 8, and the rail clip 8 is connected to the embedded steel plate 7 by bolts.

[0045] As Figure 11As shown in the figure, the wheel assembly 6 includes a wheel 61, a bearing beam 62, an angular bearing housing 63, a spherical roller bearing 64, an end cover 65, and a wheel axle 66. The wheel axle 66 is connected to the wheel 61 by a key. Both ends of the wheel axle 66 are supported on the spherical roller bearing 64. The bearing housing of the spherical roller bearing 64 is the angular bearing housing 63, which is welded to the bearing beam 62. The bearing beam 62 is connected to the load-bearing steel structure 1 or can be a part of the load-bearing steel structure 1. Axial ends of the spherical roller bearing 64 are provided with a bushing and an end cover 65, and axial positioning of the spherical roller bearing 64 is achieved through the bushing and the end cover 65.

[0046] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. Any design identical or similar to the present invention falls within the protection scope of the present invention.

Claims

1. A rotary platform for rotating and positioning a heavy load, characterized in that: It includes a load-bearing steel structure for bearing a heavy load, a center positioning mechanism, a slewing positioning mechanism, a wheel assembly, an annular heavy rail, and a driving mechanism for driving the load-bearing steel structure to rotate. The middle part of the load-bearing steel structure is connected to the civil engineering foundation through the center positioning mechanism. There are multiple wheel assemblies arranged circumferentially along the bottom of the load-bearing steel structure. The load-bearing steel structure is connected to the annular heavy rail through the wheel assembly. The slewing positioning mechanism is arranged on the outside of the load-bearing steel structure to rotate and fix the load-bearing steel structure within a certain angle range.

2. The rotary platform for rotating and positioning a heavy load as claimed in claim 1, characterized in that: The upper surface of the load-bearing steel structure is paved with a section track for the movement of the heavy carrier.

3. The rotary platform for rotating and positioning a heavy load as claimed in claim 1, characterized in that: The load-bearing steel structure is formed by assembling a plurality of steel structures by bolts, and a plurality of the steel structures are provided with stoppers for bearing shear direction forces.

4. The rotary platform for rotating and positioning a heavy load as claimed in claim 1, characterized in that: The driving mechanism includes a driving assembly and a gear plate. The driving assembly includes a driving motor, a reducer and a driving pinion. The driving pinion is connected to the movable end of the driving motor through the reducer. The gear plate is connected to the bearing steel structure. The driving pinion is meshingly connected to the gear plate.

5. The rotary platform for rotating and positioning a heavy load as claimed in claim 4, characterized in that: There are two groups of driving components, which are symmetrically arranged on both sides of the bearing steel structure.

6. The rotary platform for rotating and positioning a heavy load as claimed in claim 1, characterized in that: The center positioning mechanism includes a middle centering shaft, an upper bearing seat, a bottom bearing seat, an upper bearing shell, and a lower bearing shell. The upper bearing seat is connected to the load-bearing steel structure by bolts, and the bottom bearing seat is fixed to the civil foundation. The upper bearing shell is connected to the inside of the upper bearing seat, and the lower bearing shell is connected to the inside of the bottom bearing seat. The middle centering shaft passes through and is connected between the upper bearing shell and the lower bearing shell.

7. The rotary platform for rotating and positioning a heavy load as claimed in claim 1, characterized in that: The rotation positioning mechanism includes a stop block, a blocking and limiting device and a clamping and positioning assembly. The stop block is fixed to the outside of the load-bearing steel structure. The blocking and limiting device and the clamping and positioning assembly are arranged at the periphery of the load-bearing steel structure corresponding to the stop block. After the load-bearing steel structure rotates a certain angle, the stop block is clamped and fixed by the blocking and limiting device and the clamping and positioning assembly.

8. The rotary platform for rotating and positioning a heavy load as claimed in claim 7, characterized in that: The clamping and positioning assembly includes a base, an electro-hydraulic push rod, a clamping link and a spherical bearing. The electro-hydraulic push rod is fixedly connected to the base, and the movable end of the electro-hydraulic push rod forms a rotating pair connection with the clamping link through the spherical bearing, and the clamping link forms a rotating pair connection with the base through the kingpin shaft.

9. The rotary platform for rotating and positioning a heavy load as claimed in claim 7, characterized in that: There are two groups of rotary positioning mechanisms, which are distributed on both sides of the bearing steel structure.

10. The rotary platform for rotating and positioning a heavy load as claimed in claim 1, characterized in that: The wheel assembly includes a wheel, a load-bearing beam, an angular bearing box, a spherical roller bearing, an end cover and a wheel axle. The wheel axle is connected to the wheel via a key. Both ends of the wheel axle are supported on the spherical roller bearings. The spherical roller bearings are welded to the load-bearing beam via an angular bearing box. The spherical roller bearings are axially positioned by the end cover.

Images