Swing mechanism of gantry crane and assembly method thereof

Abstract

The embodiment of the invention provides a slewing mechanism of a gantry crane and an assembly method of the slewing mechanism, and belongs to the technical field of gantry cranes. Wherein the rotary mechanism comprises a rotary support, and a rotary table is arranged on the rotary support; the mounting piece is arranged on the rotary table, and the position of the mounting piece relative to the rotary table is adjustable; the speed reducer comprises a shell and a transmission shaft arranged at the lower end of the shell, and the shell penetrates through the rotary table and the installation piece so that the transmission shaft can be in transmission connection with the rotary support. The rotary table and the installation part are connected with the debugging assembly, and the debugging assembly is configured to drive the installation part to move relative to the rotary table so as to adjust the meshing gap between the transmission shaft and the rotary support. According to the slewing mechanism provided by the embodiment of the invention, the meshing clearance between the transmission shaft and the slewing support can be conveniently adjusted, the adjusting process is accurate and convenient, and the assembly process is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technology of portal crane, in particular to a slewing mechanism of portal crane and an assembling method thereof. BACKGROUND

[0002] The slewing mechanism is a core component of the portal crane, which comprises a slewing support and a slewing reducer meshed and connected with the slewing support. The slewing reducer drives the slewing support to rotate, so that the crane turntable located on the slewing support rotates 360°.

[0003] In the related art, an upper mounting plate is welded on the crane turntable, and a lower mounting plate is welded on the slewing support. The upper mounting plate and the lower mounting plate jointly fix the slewing reducer. However, since the upper mounting plate and the lower mounting plate are both welded and assembled, the meshing clearance of the slewing support and the slewing reducer is difficult to adjust before welding. The slewing support and the slewing reducer of the slewing mechanism are prone to meshing shaking and wear. SUMMARY

[0004] The embodiment of the present application provides a slewing mechanism of portal crane and an assembling method thereof, so as to solve the technical problem of inconvenient adjustment of the meshing clearance of the slewing support and the slewing reducer in the related art.

[0005] The embodiment of the present application provides a slewing mechanism of portal crane, comprising:

[0006] A slewing support, wherein the slewing support is provided with a turntable;

[0007] A mounting piece, wherein the mounting piece is arranged on the turntable, and the position of the mounting piece relative to the turntable is adjustable;

[0008] A reducer, wherein the reducer comprises a housing and a transmission shaft arranged on the housing, the housing penetrates the mounting piece, and the transmission shaft is meshed and connected with the slewing support;

[0009] A debugging assembly, wherein the turntable and the mounting piece are both connected with the debugging assembly, and the debugging assembly is configured to drive the mounting piece to displace relative to the turntable, so as to adjust the meshing clearance of the transmission shaft and the slewing support.

[0010] In some possible implementation manners, the mounting piece comprises a first mounting plate, the first mounting plate is arranged on the side of the turntable away from the slewing support, the housing is configured with a positioning ring, and the positioning ring is connected with the first mounting plate;

[0011] The debugging assembly includes a first debugging component connected to the turntable. The first debugging component engages at least one of the first mounting plate and the positioning ring. The first debugging component is configured to drive the first mounting plate to displace relative to the turntable in the radial direction of the drive shaft.

[0012] In some possible implementations, the first debugging component includes:

[0013] A support portion is connected to the side of the turntable opposite to the rotary support;

[0014] A snap-fit ​​part is provided on the support part and is bent relative to the support part. The snap-fit ​​part snaps with the positioning ring to limit the displacement of the positioning ring along the axial direction of the drive shaft.

[0015] A first adjusting member passes through the support portion and abuts against at least one of the positioning ring and the first mounting plate. The first adjusting member is configured to drive the first mounting plate to move radially along the transmission shaft under the action of an external force.

[0016] In some possible implementations, the first debugging component has at least three parts, and the at least three first debugging components are evenly arranged at circumferential intervals along the housing.

[0017] In some possible implementations, the mounting component further includes a second mounting plate disposed on the side of the turntable facing the rotary support;

[0018] The debugging assembly includes a second debugging component connected to the turntable. The second debugging component engages with the second mounting plate to prevent the second mounting plate from disengaging from the turntable. The second debugging component is configured to drive the second mounting plate to displace relative to the turntable in the radial direction of the drive shaft.

[0019] In some possible implementations, the second debugging component includes:

[0020] A connecting part is connected to the end face of the turntable facing the rotary support;

[0021] A bending portion is provided on the connecting portion and is bent relative to the connecting portion. The bending portion is engaged with the second mounting plate to prevent the second mounting plate from detaching from the turntable.

[0022] The second adjusting member passes through the connecting portion and abuts against the second mounting plate. The second adjusting member is configured to drive the second mounting plate to move radially along the transmission shaft under the action of an external force.

[0023] In some possible implementations, the drive shaft is provided with a first tooth and the rotary support is provided with a second tooth, the first tooth and the second tooth are meshed together, and the meshing gap is formed between the first tooth and the second tooth.

[0024] In some possible implementations, the axis of the drive shaft is eccentrically arranged with respect to the mounting axis of the housing, and the eccentricity between the axis of the drive shaft and the mounting axis of the housing is 2mm-3mm.

[0025] In some possible implementations, it also includes:

[0026] A lifting component is provided at the lower end of the drive shaft to lift the drive shaft away from the rotary support;

[0027] A buffer component is provided at one end of the lifting component facing the drive shaft. The buffer component is provided with at least one set of planar thrust bearings, which are used to bear the pressure transmitted from the drive shaft to the lifting component.

[0028] On the other hand, this application also provides an assembly method for the slewing mechanism of a gantry crane, applicable to the slewing mechanism described in any of the above claims, the assembly method of the slewing mechanism comprising:

[0029] A turntable is installed on the slewing bearing;

[0030] A mounting component is provided on the turntable, and the position of the mounting component on the plane of the turntable is adjustable;

[0031] The housing of the reducer passes through the turntable and the mounting component, and the drive shaft of the reducer is connected to the rotary support.

[0032] An adjustment component is connected to the turntable and the mounting component. The adjustment component drives the mounting component to move relative to the turntable, thereby adjusting the meshing clearance between the drive shaft and the rotary support.

[0033] The slewing mechanism and assembly method of the gantry crane provided in this application embodiment are such that the position of the mounting component on the plane of the turntable is adjustable. The housing of the reducer passes through the turntable and the mounting component. When the adjustment component drives the mounting component to move radially, the housing inside the mounting component moves synchronously with the mounting component, thereby changing the meshing clearance between the drive shaft of the housing and the slewing support. Thus, before the final welding or fixing of the mounting component, the installation position of the reducer can be finely adjusted to avoid large assembly errors in the subsequent assembly.

[0034] In addition, the adjustment component drives the mounting parts to move radially, directly adjusting the meshing clearance between the drive shaft and the slewing support. This ensures that the gear pair formed by the drive shaft and the slewing support is in a better meshing state during the assembly stage, thereby avoiding running vibration caused by excessive meshing clearance or abnormal wear caused by uneven meshing clearance. This helps to improve the smoothness and reliability of the slewing mechanism. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] Figure 1 A schematic diagram of the slewing mechanism of a gantry crane provided in an embodiment of this application;

[0037] Figure 2 for Figure 1 Enlarged structural view of the first debugging component of the intermediate slewing mechanism;

[0038] Figure 3 for Figure 2 A 3D view of the first debugging component;

[0039] Figure 4 for Figure 1 Enlarged view of the structure of the second debugging component of the slewing mechanism;

[0040] Figure 5 for Figure 4 A 3D view of the second debugging component;

[0041] Figure 6 for Figure 1 A schematic diagram of the lifting and buffer components of the slewing mechanism;

[0042] Figure 7 for Figure 6 A partial cross-sectional view of the buffer component.

[0043] Explanation of reference numerals in the attached figures

[0044] 100 - Slewing bearing; 110 - Second tooth;

[0045] 200 - Turntable; 210 - Installation channel;

[0046] 300 - Mounting component; 310 - First mounting plate; 320 - Second mounting plate;

[0047] 400 - Reducer; 410 - Housing; 411 - Positioning ring; 412 - Screw hole; 420 - Drive shaft; 421 - First tooth;

[0048] 500 - Debugging Components;

[0049] 510 - First debugging component; 511 - Support part; 512 - Snap-fit ​​part; 5121 - Slot; 513 - First adjusting component; 514 - First positioning component;

[0050] 520 - Second adjustment component; 521 - Connecting part; 522 - Bending part; 523 - Second adjusting component; 524 - Second positioning component;

[0051] 600 - Lifting component;

[0052] 700 - Buffer component; 710 - Horizontal thrust bearing; 720 - Ball bearing.

[0053] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0054] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application.

[0055] As mentioned in the background technology, the current assembly method for the slewing mechanism of the gantry crane is a traditional manual assembly process. That is, an upper mounting plate is welded onto the crane turntable, a lower mounting plate is welded onto the slewing support, the slewing reducer is hoisted into the mounting hole of the upper mounting plate, and is initially fixed by connecting the slewing reducer to the upper mounting plate with the mounting bolts. The subsequent installation relies entirely on the experience of the assembly workers. By observing and manually turning the gear, they roughly judge the meshing condition of the small gear of the drive shaft of the slewing reducer and the second tooth of the slewing support, and finally tighten the bolts to complete the installation.

[0056] However, the upper and lower mounting plates have been welded and fixed to the corresponding mounting components. The two mounting plates are welded in place and their positions cannot be adjusted. This means that the slewing reducer must adapt to the mounting foundation with existing errors. As a result, there will be assembly errors in the gear pair between the slewing reducer and the slewing support. This can easily lead to problems such as excessive, insufficient, or uneven meshing backlash between the slewing reducer and the slewing support, affecting the normal operation of the slewing mechanism.

[0057] Based on this, one or more embodiments of this application provide a slewing mechanism for a gantry crane and its assembly method. In the slewing mechanism, the position of the mounting component on the plane of the turntable is adjustable. The housing of the reducer passes through the turntable and the mounting component. When the adjustment component drives the mounting component to move radially, the housing inside the mounting component moves synchronously with the mounting component, thereby changing the meshing clearance between the drive shaft of the housing and the slewing support. Thus, before the final welding or fixing of the mounting component, the installation position of the reducer can be finely adjusted to avoid large assembly errors in the subsequent assembly.

[0058] The following description, in conjunction with the accompanying drawings, illustrates the solutions of the embodiments of this application.

[0059] like Figure 1 As shown in the embodiment of this application, the slewing mechanism of the gantry crane includes a slewing support 100, a mounting component 300, a reducer 400, and a debugging component 500.

[0060] A turntable 200 is provided on the slewing support 100; a mounting member 300 is provided on the turntable 200, and the position of the mounting member 300 relative to the turntable 200 is adjustable; the reducer 400 includes a housing 410 and a drive shaft 420 provided at the lower end of the housing 410, the housing 410 passes through the turntable 200 and the mounting member 300 so that the drive shaft 420 is meshed with the slewing support 100; the turntable 200 and the mounting member 300 are both connected to the adjustment assembly 500, the adjustment assembly 500 is configured to drive the mounting member 300 to move relative to the turntable 200 so as to adjust the meshing clearance between the drive shaft 420 and the slewing support 100.

[0061] As can be seen from the above description, the rotary mechanism of this application embodiment allows the position of the mounting component 300 on the turntable 200 to be adjustable. By driving the mounting component 300 to move through the adjustment component 500, the meshing backlash between the transmission shaft 420 and the rotary support 100 can be adjusted accordingly. This facilitates the adjustment of the meshing backlash before the mounting plate is welded and fixed, improves the meshing accuracy between the rotary support 100 and the reducer 400, and makes the entire adjustment process more convenient and faster.

[0062] In addition, the adjustment component 500 drives the installation component 300 to move, directly adjusting the meshing clearance between the transmission shaft 420 and the slewing support 100. This ensures that the gear pair formed by the transmission shaft 420 and the slewing support 100 is in a better meshing state during the assembly stage, thereby avoiding running vibration caused by excessive meshing clearance or abnormal wear caused by uneven meshing clearance. This helps to improve the smoothness and reliability of the slewing mechanism.

[0063] In some embodiments, a first tooth 421 is formed on the drive shaft 420, and a second tooth 110 is formed on the rotary support 100. The first tooth 421 and the second tooth 110 are meshed together, and a meshing gap is formed between the first tooth 421 and the second tooth 110.

[0064] Specifically, the outer ring of the slewing support 100 integrates a second tooth 110. The outer ring is fastened to the gantry frame of the gantry crane by high-strength bolts. The inner ring serves as a rotation reference surface and is fixedly connected to the lower surface of the turntable 200, thereby driving the turntable 200 and its components to rotate relative to the gantry frame. The second tooth 110 on the outer ring of the slewing support 100 meshes with the first tooth 421 at the end of the drive shaft 420 of the reducer 400, transmitting the power of the reducer 400 to the rotational motion of the entire slewing mechanism.

[0065] In this embodiment, the turntable 200 is a rigid box-shaped structure or a frame structure welded from steel plates. The lower surface of the turntable 200 is fastened to the inner ring of the slewing support 100 and is driven to rotate by the slewing support 100. The upper surface of the turntable 200 is provided with a machined and flat installation area for arranging and installing the mounting parts 300 and other related accessories. Here, the turntable 200 is provided with an installation channel 210 that allows the reducer 400 housing 410 to pass through. The diameter of the installation channel 210 is larger than the diameter of the housing 410, reserving adjustment space for the small displacement required by the reducer 400 during installation and subsequent debugging.

[0066] like Figure 2 As shown, in some embodiments, the mounting component 300 includes a first mounting plate 310, which is disposed on the side of the turntable 200 opposite to the rotary support 100. The housing 410 is configured with a positioning ring 411, which is connected to the first mounting plate 310. The debugging component 500 includes a first debugging member 510, which engages at least one of the first mounting plate 310 and the positioning ring 411. The first debugging member 510 is configured to drive the first mounting plate 310 to move relative to the turntable 200 in the radial direction of the drive shaft 420.

[0067] In the above embodiment, the first mounting plate 310 will be welded and fixed to the turntable 200 later. Therefore, a weld notch will be constructed on the side of the first mounting plate 310 facing the turntable 200 to facilitate subsequent welding work. The first mounting plate 310 is made of metal steel plate and is laid horizontally on the side of the turntable 200 away from the rotary support 100. That is, the first mounting plate 310 is set on the upper side of the turntable 200. A through hole for the housing 410 to pass through is opened at the center of the first mounting plate 310.

[0068] Here, the positioning ring 411 is an annular boss integrally cast or machined with the housing 410 of the reducer 400, or the positioning ring 411 is a separately manufactured annular flange part welded to the outer wall of the housing 410. The outer diameter of the positioning ring 411 is larger than the outer diameter of the housing 410, and in the axial direction, the positioning ring 411 and the housing 410 form a stepped surface. Thus, after the reducer 400 passes through the turntable 200 via the first mounting plate 310, the lower end face of the positioning ring 411 abuts against the upper end face of the first mounting plate 310, and the stepped surface of the positioning ring 411 axially limits the housing 410, preventing the reducer 400 from continuously moving downward on the turntable 200.

[0069] In some embodiments, the positioning ring 411 has a plurality of openings spaced apart along its circumferential direction. The positioning ring 411 and the first mounting plate 310 can be fixedly connected by a plurality of bolts passing through the openings, thereby fixing the upper part of the reducer 400 onto the turntable 200.

[0070] Furthermore, such as Figure 2 and Figure 3 As shown, the first adjustment component 510 includes a support part 511, a snap-fit ​​part 512, and a first adjustment part 513.

[0071] The support portion 511 is connected to the turntable 200 on the side opposite to the rotary support 100; the snap-fit ​​portion 512 is bent relative to the support portion 511 and snaps into the positioning ring 411; the first adjusting member 513 passes through the support portion 511 and abuts against at least one of the positioning ring 411 and the first mounting plate 310; the first adjusting member 513 is configured to drive the first mounting plate 310 to move radially along the drive shaft 420 under the action of external force.

[0072] In the first adjustment component 510 mentioned above, the support part 511 and the snap-fit ​​part 512 are integrally formed metal parts. The cross-section of the support part 511 and the snap-fit ​​part 512 is L-shaped. The support part 511 is fixed to the upper surface of the turntable 200 by the first positioning member 514. The side wall of the support part 511 has a through hole for inserting the first adjusting member 513 so that the first adjusting member 513 can rotate in the radial direction.

[0073] The bending angle of the snap-fit ​​part 512 relative to the support part 511 is 90°. When the support part 511 is fixed on the turntable 200, at least part of the orthographic projection of the snap-fit ​​part 512 on the turntable 200 coincides with the orthographic projection of the positioning ring 411 on the turntable 200. Thus, after the bolt fastener is inserted into the screw hole 412 reserved on the positioning ring 411, the bolt fastener engages with the support part 511, so that the snap-fit ​​part 512 blocks the rotation of the positioning ring 411 itself.

[0074] Furthermore, since the snap-fit ​​part 512 is located on the upper side of the positioning ring 411 and the first mounting plate 310, and the support part 511 is fixed on the turntable 200, the snap-fit ​​part 512 can also prevent the housing 410 from moving upward in the axial direction, which is beneficial for pre-positioning the housing 410 of the reducer 400 on the turntable 200 and facilitates assembly.

[0075] As an alternative implementation, the snap-fit ​​part 512 is provided with a slot 5121 for snapping the bolt fastener on the positioning ring 411. Along the circumferential direction of the positioning ring 411, each side of the snap-fit ​​part 512 is snapped by a bolt fastener, and the bolt fastener is also snapped in the slot 5121, thereby further enhancing the limiting effect between the snap-fit ​​part 512 and the positioning ring 411, and blocking the circumferential rotation of the positioning ring 411 by the snap-fit ​​part 512.

[0076] like Figure 3 As shown, in this embodiment, the first adjusting member 513 is a bolt threaded onto the support portion 511. When the first adjusting member 513 is rotated by external force, the screw end of the first adjusting member 513 extends radially into the support portion 511 and abuts against the first mounting plate 310 and the positioning ring 411. Since the support portion 511 itself is fixed on the turntable 200, the first adjusting member 513 pushes against the first mounting plate 310 and the positioning ring 411 during the screwing process, thereby causing the housing 410 of the reducer 400 to move and displace on the plane of the turntable 200, causing it to move closer to the turntable 200. When the first adjusting member 513 is loosened in the opposite direction, the housing 410 of the reducer 400 moves away from the turntable 200 in the opposite direction through the first adjusting component 510 arranged symmetrically on the other side.

[0077] Here, the first adjusting member 513 can push against the side wall of the first mounting plate 310 or the side wall of the positioning ring 411, or the first adjusting member 513 can push against the side walls of the first mounting plate 310 and the positioning ring 411 together. This is not an absolute limitation in the embodiments of this application.

[0078] Compared to related technologies where workers directly tap or pry the reducer housing 410 to adjust the meshing clearance, the displacement distance of the reducer housing 410 can be precisely adjusted by turning the first adjusting component 513, eliminating the uncertainty of manual tapping or prying adjustment and improving the accuracy of adjusting the meshing clearance.

[0079] As an alternative implementation, in this embodiment of the application, the first debugging component 510 has at least three components, and the at least three first debugging components 510 are evenly arranged at circumferential intervals along the housing 410.

[0080] For example, four first adjustment components 510 are evenly arranged circumferentially. During the initial installation of the rotary mechanism, multiple first adjustment components 510 can be operated to radially push the reducer 400 housing 410 using multiple first adjusting members 513, working in concert to move the reducer 400 housing 410 to the precise installation position. Furthermore, the multi-point arrangement of the first adjustment components 510 can effectively prevent accidental rotation and axial displacement of the reducer 400 housing 410, making the adjustment process of the reducer 400 more convenient and faster.

[0081] In some embodiments, such as Figure 4 and Figure 5 As shown, the mounting component 300 also includes a second mounting plate 320, which is disposed on the side of the turntable 200 facing the rotary support 100; the debugging component 500 includes a second debugging component 520, which is connected to the turntable 200. The second debugging component 520 engages with the second mounting plate 320 to prevent the second mounting plate 320 from disengaging from the turntable 200. The second debugging component 520 is configured to drive the second mounting plate 320 to move relative to the turntable 200 in the radial direction of the drive shaft 420.

[0082] Similarly, the second mounting plate 320 will be welded and fixed to the turntable 200 later. Therefore, the side of the second mounting plate 320 facing the turntable 200 also has a weld notch. The second mounting plate 320 is located on the lower side of the turntable 200, and a through hole for the housing 410 to pass through is also provided at the center of the second mounting plate 320.

[0083] The first mounting plate 310, the second mounting plate 320, and the mounting channel 210 on the turntable 200 together constitute the mounting structure of the circumferentially limiting reducer 400 housing 410, enhancing the connection strength and stability of the turntable 200 to the reducer 400 housing 410. Furthermore, the first adjustment component 510 engages with the upper part of the reducer 400 housing 410, and the second adjustment component 520 engages with the lower part of the reducer 400 housing 410. Thus, both ends of the reducer 400 housing 410 are constrained and limited, resulting in better anti-rotation and anti-axial displacement effects, which facilitates smooth subsequent debugging and trial operation.

[0084] Furthermore, such as Figure 5 As shown, the second debugging component 520 and the first debugging component 510 have similar structures. For example, the second debugging component 520 includes a connecting part 521, a bending part 522, and a second adjusting member 523.

[0085] The connecting part 521 is connected to the end face of the turntable 200 facing the rotary support 100; the bending part 522 is bent relative to the connecting part 521 and is engaged with the second mounting plate 320; the second adjusting member 523 passes through the connecting part 521 and abuts against the second mounting plate 320. The second adjusting member 523 is configured to move radially under the action of external force to drive the drive shaft 420 to move closer to or away from the rotary support 100.

[0086] Since the second mounting plate 320 is movably positioned relative to the turntable 200, the bending part 522 in the second debugging component 520 snaps the second mounting plate 320 onto the turntable 200. The bending part 522 also supports the second mounting plate 320, preventing the second mounting plate 320 from detaching from the turntable 200 under the action of gravity.

[0087] Here, the connecting part 521 and the bending part 522 are integrally formed metal parts, and their cross-sections are L-shaped. The connecting part 521 is fixed to the lower surface of the turntable 200 by the second positioning member 524. The side wall of the connecting part 521 has a through hole for inserting the second adjusting member 523, so that the second adjusting member 523 can be rotated radially by thread. Here, both the first positioning member 514 and the second positioning member 524 can be bolts.

[0088] The bending angle of the bending portion 522 relative to the connecting portion 521 is 90°. When the connecting portion 521 is fixed on the turntable 200, at least part of the orthographic projection of the bending portion 522 on the turntable 200 coincides with the orthographic projection of the second mounting plate 320 on the turntable 200. The bending portion 522 supports the second mounting plate 320 from below, preventing the second mounting plate 320 from detaching from the turntable 200. As can be seen from the above description, the bending portion 522 and the second mounting plate 320 are detachably snap-fitted together. By removing the bolts between the connecting portion 521 and the turntable 200, the second debugging component 520 can be removed. Therefore, after welding the second mounting plate 320, the second debugging component 520 can be directly removed without affecting the normal operation of the subsequent rotary mechanism.

[0089] In this embodiment, the second adjusting member 523 is a bolt threaded onto the connecting part 521. When the second adjusting member 523 is rotated by external force, the screw end of the second adjusting member 523 extends radially into the connecting part 521 and abuts against the second mounting plate 320. Since the connecting part 521 itself is fixed to the lower surface of the turntable 200, the second adjusting member 523 pushes against the second mounting plate 320 during the screwing process, thereby causing the housing 410 of the reducer 400 to move and displace on the plane of the turntable 200, causing it to move closer to the turntable 200. When the second adjusting member 523 is loosened in the opposite direction, the housing 410 of the reducer 400 moves away from the turntable 200 in the opposite direction through the second adjusting member 520 symmetrically arranged on the other side.

[0090] With the above settings, during debugging, the position of the housing 410 of the reducer 400 can be finely adjusted synchronously by the first adjusting member 513 and the second adjusting member 523, thereby further improving the accuracy of the housing 410 position adjustment of the reducer 400.

[0091] It should be noted that, in this embodiment of the application, since both the first adjusting member 513 and the second adjusting member 523 are bolted parts, during the debugging process, the first adjusting member 513 can be debugged first, and then the second adjusting member 523 can be debugged. By determining the screw pitch of the first adjusting member 513, the screw length of the second adjusting member 523 can be adjusted accordingly; or, the second adjusting member 523 can be debugged first, and then the first adjusting member 513 can be debugged. By determining the screw pitch of the second adjusting member 523, the screw length of the first adjusting member 513 can be adjusted accordingly. This setting can also ensure that the axial direction of the housing 410 of the reducer 400 always remains vertical, and avoid the housing 410 of the reducer 400 from tilting or shifting.

[0092] As an alternative implementation, the second debugging component 520 has at least three, with at least three first debugging components 510 evenly spaced along the circumferential distance of the housing 410. The multi-point arrangement of the second debugging components 520 can also effectively engage the second mounting plate 320, improving the connection stability between the second mounting plate 320 and the housing 410 of the reducer 400, making the debugging process of the reducer 400 more convenient and faster.

[0093] In this embodiment, the axis of the drive shaft 420 is eccentrically arranged with respect to the mounting axis of the housing 410, and the eccentricity between the axis of the drive shaft 420 and the mounting axis of the housing 410 is 2mm-3mm.

[0094] In the above embodiments, eccentricity refers to the offset in the horizontal plane between the axis corresponding to the drive shaft 420 of the reducer 400 and the center of the cylindrical structure used for mounting and positioning on the outside of the housing 410 of the reducer 400. When the housing 410 rotates around its own mounting axis, since the axis of the drive shaft 420 inside it is offset parallel to it by a certain distance, the movement trajectory of the drive shaft 420 and the end gear is a standard circular trajectory with the mounting axis as the center and the eccentricity distance as the radius.

[0095] Here, the eccentricity between the axis of the drive shaft 420 and the mounting axis of the housing 410 is 2mm, 2.5mm, or 3mm. The eccentric reducer 400 can achieve continuous meshing clearance variation within a planar range, realizing precise adjustment of the meshing clearance between the gear of the rotary reducer 400 and the second tooth 110 of the rotary support 100. For example, with an eccentricity of 2.5mm, the meshing clearance can be adjusted with a circular profile of 2.5mm radius.

[0096] The eccentrically designed reducer 400, working in conjunction with the adjustment component 500, can achieve both coarse and fine adjustment. After the gears of the slewing support 100 and the drive shaft 420 are meshed using the first adjustment component 513 and the second adjustment component 523, the first mounting plate 310 and the second mounting plate 320 can be initially tightened. Then, the connection between the positioning ring 411 of the housing 410 and the first mounting plate 310 is released. After the entire reducer 400 is lifted by the lifting component 600, the operator rotates the reducer housing 410 according to the measured meshing clearance. As the housing 410 rotates around its mounting axis, the gear at the end of the drive shaft 420 will move along the aforementioned circular trajectory, thereby continuously changing the precise center distance between the gear and the second tooth 110 of the slewing support 100.

[0097] Furthermore, in some embodiments, such as Figure 6 and Figure 7 As shown, the slewing mechanism also includes a lifting component 600 and a buffer component 700.

[0098] The lifting component 600 is located at the lower end of the drive shaft 420 to lift the drive shaft 420 away from the slewing support 100; at the end of the lifting component 600 facing the drive shaft 420, the buffer component 700 is provided with at least one set of planar thrust bearings 710, which are used to bear the pressure transmitted from the drive shaft 420 to the lifting component 600.

[0099] In the above embodiments, the lifting component 600 can be a hydraulic jack from the related technology. The buffer component 700 is fixed to the upper end of the lifting component 600 and directly abuts against the lower end of the drive shaft 420 during the debugging process. When the lifting component 600 is lifted, the buffer component 700 drives the housing 410 of the lifting reducer 400 to rise and disengage from the slewing support 100.

[0100] The lifting component 600 is located directly below the drive shaft 420 and can be used directly on-site without relying on large auxiliary lifting equipment such as bridge cranes, which helps to reduce maintenance time costs, equipment costs and coordination difficulties.

[0101] Here, the planar thrust bearing 710 in the buffer component 700 can provide a low-friction, high-precision debugging environment for the reducer 400 housing 410. The planar thrust bearing 710 reduces the sliding friction between the reducer 400 housing 410 and the drive shaft 420, converting it into rolling friction. Operators can easily and smoothly rotate the reducer 400 housing 410 with a small force, which facilitates the rotation debugging work of the reducer 400 housing 410 in the later stage.

[0102] Furthermore, in this embodiment, the buffer component 700 is provided with a ball bearing 720 at one end facing the drive shaft 420. The ball bearing 720 is constrained on the buffer component 700 by a ball bearing plate. The ball bearing 720 directly contacts the lower end of the drive shaft 420, thereby preventing the lower end of the drive shaft 420 from rotating directly and causing dry grinding or scratches, which is beneficial to protecting the lower end surface of the drive shaft 420.

[0103] By setting up the aforementioned lifting component 600, when the position of the reducer 400 needs to be adjusted, the reducer 400 can be directly lifted for operation. The buffer component 700 reduces the hard friction between the transmission shaft 420 and the lifting component 600, eliminating the need to set up external large hoisting equipment to lift the reducer 400. This makes the subsequent meshing clearance inspection and maintenance of the slewing mechanism more convenient.

[0104] Another embodiment of this application also provides a method for assembling the slewing mechanism of a gantry crane, applicable to the slewing mechanism in any of the above embodiments. The method for assembling the slewing mechanism includes:

[0105] S100, a turntable 200 is installed on the slewing support 100;

[0106] S200, a mounting component 300 is provided on the turntable 200, and the position of the mounting component 300 on the plane of the turntable 200 is adjustable;

[0107] S300, the housing 410 of the reducer 400 passes through the turntable 200 and the mounting part 300, and the drive shaft 420 of the reducer 400 is connected to the slewing support 100 for transmission.

[0108] S400, the adjustment component 500 is connected on the turntable 200. The adjustment component 500 limits the axial displacement of the mounting component 300 and the housing 410, and drives the mounting component 300 to move radially, so as to adjust the meshing clearance between the drive shaft 420 and the slewing support 100.

[0109] Since the assembly method of the rotary mechanism in this application embodiment is used for the rotary mechanism in any of the above embodiments, it has all the advantages of the rotary mechanism.

[0110] The assembly method of the slewing mechanism of the gantry crane according to the embodiments of this application, an exemplary assembly process is as follows:

[0111] The speed reducer 400 is hoisted to the corresponding installation position on the turntable 200 using hoisting equipment. The housing 410 of the speed reducer 400 is then sequentially inserted into the first mounting plate 310, the installation channel 210 of the turntable 200, and the second mounting plate 320. The motor, brake, and other related working components of the speed reducer 400 are then installed. Subsequently, the first debugging component 510 of the debugging assembly 500 is fixed to the upper surface of the turntable 200 to pre-position the upper part of the speed reducer 400 and the first mounting plate 310. The second debugging component 520 of the debugging assembly 500 is fixed to the lower surface of the turntable 200 to pre-position the lower part of the speed reducer 400 and the second mounting plate 320.

[0112] External force drives the first adjusting member 513 of the first debugging component 510 to be screwed in, and external force drives the second adjusting member 523 of the second debugging component 520 to be screwed in, adjusting the meshing clearance between the first tooth 421 of the transmission shaft 420 and the second tooth 110 of the rotary support 100. After the initial debugging is completed, the test run begins.

[0113] During the above debugging process, the first adjusting component 513 and the second adjusting component 523 can be adjusted accordingly to test the meshing clearance of the reducer 400 at different positions until the rotary mechanism is arranged in a suitable meshing clearance position. The first mounting plate 310 and the second mounting plate 320 are welded and fixed to the turntable 200. The positioning ring 411 of the housing 410 is fastened to the first mounting plate 310 by multiple circumferential bolts. The first debugging component 510 and the second debugging component 520 are then removed.

[0114] Test run the rotary mechanism and measure whether the meshing clearance meets the working requirements. If adjustment is needed, the reducer 400 can be lifted by the lifting component 600, so that the drive shaft 420 of the reducer 400 is temporarily disengaged from the rotary support 100. The installation angle of the reducer 400 can be adjusted by rotation. After fine adjustment of the angle, it can be re-engaged with the rotary support 100 to achieve fine adjustment of the meshing clearance of the rotary support 100.

[0115] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0116] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A slewing mechanism of a portal crane, characterized in that The utility model relates to a rotary support, which is provided with a rotary table. The utility model relates to a mounting piece, which is arranged on the rotary table, and the position of the mounting piece relative to the rotary table is adjustable. The utility model relates to a speed reducer, which comprises a housing and a transmission shaft arranged on the housing, the housing penetrates the mounting piece, and the transmission shaft is engaged with the rotary support. The utility model relates to a debugging assembly, which is connected with the rotary table and the mounting piece, and is configured to drive the mounting piece to displace relative to the rotary table to adjust the engagement gap between the transmission shaft and the rotary support. The mounting piece comprises a first mounting plate, which is arranged on the side of the rotary table away from the rotary support, and the housing is provided with a positioning ring, which is connected with the first mounting plate.

2. The slewing mechanism of a portal crane according to claim 1, characterized in that The debugging assembly comprises a first debugging component, which is connected with the rotary table, and is clamped with at least one of the first mounting plate and the positioning ring, and is configured to drive the first mounting plate to displace along the radial direction of the transmission shaft relative to the rotary table. The first debugging component comprises:

3. The slewing mechanism of a portal crane according to claim 2, characterized in that a support part connected with the side of the rotary table away from the rotary support; a clamping part arranged on the support part and bent relative to the support part, which is clamped with the positioning ring to limit the displacement of the positioning ring along the axis direction of the transmission shaft; a first adjusting piece penetrating the support part and abutting against at least one of the positioning ring and the first mounting plate, which is configured to drive the first mounting plate to displace along the radial direction of the transmission shaft under the action of external force. The first debugging component has at least three, and the at least three first debugging components are uniformly arranged along the circumference of the housing.

4. The slewing mechanism of a portal crane according to claim 2, characterized in that The mounting piece further comprises a second mounting plate arranged on the side of the rotary table facing the rotary support.

5. The slewing mechanism of a portal crane according to claim 1, characterized in that The debugging assembly comprises a second debugging component connected with the rotary table, which is clamped with the second mounting plate to block the second mounting plate from being separated from the rotary table, and is configured to drive the second mounting plate to displace along the radial direction of the transmission shaft relative to the rotary table. The second debugging component comprises:

6. The slewing mechanism of a portal crane according to claim 5, characterized in that a connecting part connected with the end face of the side of the rotary table facing the rotary support; a bent part arranged on the connecting part and bent relative to the connecting part, which is clamped with the second mounting plate to block the second mounting plate from being separated from the rotary table; a second adjusting piece penetrating the connecting part and abutting against the second mounting plate, which is configured to drive the second mounting plate to displace along the radial direction of the transmission shaft under the action of external force. The transmission shaft is provided with a first tooth part, the rotary support is provided with a second tooth part, the first tooth part and the second tooth part are engaged, and the engagement gap is formed between the first tooth part and the second tooth part.

7. The slewing mechanism of a portal crane according to any one of claims 1 to 6, characterized in that ​ 8. The slewing mechanism of a portal crane according to any one of claims 1 to 6, characterized in that The axis of the transmission shaft is arranged eccentrically to the mounting axis of the housing, and the eccentricity of the axis of the transmission shaft to the mounting axis of the housing is 2-3 mm.

9. A slewing mechanism for a portal crane according to claim 8, characterized in that Further comprising: a jacking component arranged at the lower end of the transmission shaft to jack the transmission shaft away from the slewing support; a buffer component arranged at the end of the jacking component facing the transmission shaft, and at least one set of plane thrust bearings is arranged on the buffer component, and the plane thrust bearings are used to receive the pressure transmitted by the transmission shaft to the jacking component.

10. A method of assembling a slewing mechanism of a portal crane, characterized in that The assembly method of the slewing mechanism of the portal crane according to any one of claims 1-9 comprises: arranging a turntable on the slewing support; arranging a mounting member on the turntable, and the position of the mounting member on the plane of the turntable is adjustable; arranging the housing of the speed reducer through the turntable and the mounting member, and driving the transmission shaft of the speed reducer into transmission connection with the slewing support; arranging a debugging assembly on the turntable and the mounting member, and driving the mounting member to displace relative to the turntable through the debugging assembly to adjust the meshing clearance between the transmission shaft and the slewing support.

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