Hinge structure with split type self-lubricating end face bearing and disassembly and assembly method of hinge structure

Abstract

The invention provides a hinge structure with a split type self-lubricating end face bearing and a dismounting and mounting method of the hinge structure. The hinge structure comprises a hinge plate, an arm support structure and the end face bearing, and the end face bearing is arranged between the hinge plate and the arm support structure; the end face bearing comprises a lower end face bearing connected to one side of the hinged plate in a clamped mode, an upper end face bearing is arranged above the lower end face bearing, the upper end face bearing and the lower end face bearing are both semicircular and matched to form a circular ring structure, and an arm support hinged shaft is installed in the circular ring structure. A bearing cover is arranged on the outer edge of the upper end face bearing, and the upper end face bearing is fixed to the hinge plate. The bearing cover is also a semicircular ring, limiting blocks are arranged at the two ends of the bearing cover and used for being inserted into the limiting grooves in the hinge plate, and the bearing cover is fixed to the hinge plate through fasteners. The problems that an existing end face bearing is poor in axial positioning and lubricating effect, a whole hinge point shaft needs to be dismantled during replacement, and maintenance and replacement are difficult are solved.

Description

Technical Field

[0001] This invention belongs to the field of bearing technology, specifically relating to a hinge structure of a split self-lubricating end face bearing and its disassembly and assembly method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Large offshore cranes are widely used in wind power, oil and gas, and infrastructure construction, and their application scenarios will continue to expand in the future. They rely on the boom for lifting operations, and the hinge point, as the main structural support for the boom, is crucial to the crane's operation and maintenance. Currently, the conventional end-face bearing between the boom and the hinge point plate is a steel ring. Its main functions include: adjusting for structural manufacturing errors (machined according to the measured gap between the boom and the hinge point plate before boom axle assembly); preventing axial movement of the boom, limiting movement under various axial loads, and ensuring stable operation; and reducing wear between the boom and the hinge point plate by using wear-resistant materials and machining oil grooves to ensure lubrication.

[0004] The existing technology for machining end face bearings is complex. The thickness needs to be matched on-site and machined using a CNC machining center, which causes the boom to stop working through the shaft, wasting equipment and manpower, and reducing economy and safety. The axial positioning and lubrication effect are poor. After the crane has been used for a period of time, the hinge point distance will change, but the bearing cannot be adjusted accordingly, resulting in increased clearance. Lubricating oil cannot reach the entire end face, which deteriorates the working environment of the hinge point shaft. Maintenance and replacement are difficult. Replacement requires the removal of the entire hinge point shaft, which is difficult, costly and time-consuming to remove from the hinge point shaft of offshore cranes, resulting in poor economy. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a hinge structure with a split self-lubricating end face bearing and its disassembly and assembly method, which solves the problems of poor axial positioning and lubrication effect of existing end face bearings, and the difficulty of maintenance and replacement caused by the need to remove the entire hinge shaft during replacement.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides a hinge structure with a split self-lubricating end face bearing, comprising: a hinge plate, a boom structure and an end face bearing, wherein the end face bearing is disposed between the hinge plate and the boom structure; The end face bearing includes a lower end face bearing snapped onto one side of the hinge plate, and an upper end face bearing disposed above the lower end face bearing. Both the upper and lower end face bearings are semi-circular and cooperate to form a circular ring structure. The boom hinge shaft is installed in the circular ring structure. A bearing cover is provided on the outer edge of the upper end face bearing to fix the upper end face bearing to the hinge plate. The bearing cover is also a semi-circular ring with limit blocks at both ends for insertion into the limit grooves on the hinge plate. The bearing cover is fixed to the hinge plate by fasteners.

[0007] As a further implementation, a hinge pin retaining plate is provided on the other side of the hinge plate to limit the axial movement of the boom hinge pin.

[0008] As a further implementation, the hinge pin retainer plate has several flange holes near its edge, and the flange holes are evenly distributed. The flange holes are used to fix the hinge pin retainer plate to the hinge plate by fasteners.

[0009] As a further implementation, a through hole is provided at the center of the hinge pin plate, and the through hole is used to install the shaft end of the boom hinge pin.

[0010] As a further implementation, the hinge plate is provided with a bearing seat, the limiting hole is provided on the bearing seat, and the bearing seat is provided with a mounting groove adapted to the size of the lower end face bearing for mounting the lower end face bearing and enabling the lower end face bearing to rotate relative to the mounting groove. The cross-sectional shape of the mounting groove is L-shaped.

[0011] As a further implementation, the limiting block is a conical block, the limiting groove is a conical hole, the positions of the limiting block and the limiting groove correspond to each other, and the depth of the conical hole is greater than the height of the conical block, which facilitates the positioning and fixing of the bearing cover.

[0012] As a further implementation, a sliding bearing is provided between the boom structure and the boom hinge shaft, and the sliding bearing is located between the end face bearings at both ends of the boom structure.

[0013] As a further implementation, the end face bearing is made of a polymer-based self-lubricating composite material, which is made by mixing a polymer matrix and a nano-lubricant in a set ratio.

[0014] Secondly, the present invention also provides a method for disassembling and assembling a hinged structure having a split self-lubricating end-face bearing, comprising the following steps: Step 1. Assemble the boom hinge pin and boom structure onto the hinge point plate, and install the hinge pin retaining plate; Step 2. Measure the dimensions of the two sets of gaps between the boom structure and the hinge plate, determine the thickness of the end face bearings based on the dimensions, and install each end face bearing to the corresponding position according to its dimensions. Step 3. Attach the intact lower end bearing to the boom hinge pin, then rotate and push it in until it completely overlaps with the mounting groove of the bearing seat; place the intact upper end bearing on the boom hinge pin, making the two ends of the upper end bearing overlap with the two ends of the lower end bearing, and use fasteners to fix the bearing cap to the hinge plate. Installation is complete.

[0015] Step 4. During disassembly, remove the fasteners, remove the bearing cover from the hinge plate, remove the worn upper end bearing, and use tools to rotate and push the worn lower end bearing out of the mounting slot of the bearing seat.

[0016] As a further implementation, when the end face bearing needs maintenance, steps two and three should be performed after step four.

[0017] Compared with the prior art, the advantages and positive effects of this invention are: This invention features a semi-circular upper and lower end-face bearing that forms a circular ring structure. The boom hinge shaft is mounted within this ring structure. The split design eliminates the need to disassemble the boom hinge shaft during installation. The lower end-face bearing is simply rotated and pushed into the mounting structure on the hinge plate, and the upper end-face bearing is then fastened onto the boom hinge shaft. The outer edge of the upper end-face bearing is fitted with a bearing cap, also a semi-circular ring, with limit blocks at both ends for insertion into limit grooves on the hinge plate. The bearing cap is secured to the hinge plate with fasteners. By fixing the upper end-face bearing with the bearing cap, a circular bearing structure is formed between the upper and lower end-face bearings, thus fixing the upper end-face bearing to the hinge plate. This effectively improves the connection stability between the boom hinge shaft and the end-face bearings, while also shortening installation and maintenance time.

[0018] The hinge shaft retaining plate of this invention has several flange holes near its edge, and these flange holes are evenly distributed. The flange holes are used to fix the hinge shaft retaining plate to the hinge plate using fasteners. The even distribution of the flange holes and the use of multiple bolts for fixation ensures balanced force distribution on the hinge shaft retaining plate, avoids localized stress concentration, and guarantees the axial stability of the boom hinge shaft. A through hole is provided at the center of the hinge shaft retaining plate for installing the shaft end of the boom hinge shaft, ensuring the positional accuracy of the boom hinge shaft and reducing the impact on the end face bearing maintenance process.

[0019] This invention incorporates a mounting groove in the bearing housing that matches the dimensions of the lower end-face bearing, allowing the lower end-face bearing to rotate relative to the mounting groove. The mounting groove has an L-shaped cross-section, ensuring the lower end-face bearing is stably fixed to the hinge plate. This simultaneously guarantees the stability of both the upper and lower end-face bearings during use, preventing localized wear and failure, and effectively extending the fatigue life of the end-face bearings. The limiting block is a conical block, and the limiting groove is a conical hole, achieving pre-positioning before the bearing cover is fixed, preventing misalignment during installation and improving assembly efficiency. The depth of the conical hole is greater than the height of the conical block, facilitating the positioning and fixing of the bearing cover. After the bearing cover is assembled, a gap forms between the conical block and the bottom of the conical hole, preventing the bearing cover from being improperly installed. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] Figure 1 This is a schematic diagram of the hinge structure of the split self-lubricating end face bearing of the present invention. Figure 2 This is a cross-sectional view of the hinged structure of the split self-lubricating end-face bearing of the present invention. Figure 3 This is a partial exploded view of the hinge structure of the split self-lubricating end-face bearing of the present invention.

[0022] In the diagram: 1. Hinge plate; 2. Boom structure; 3. End face bearing; 4. Boom hinge shaft; 5. Lower end face bearing; 6. Upper end face bearing; 7. Bearing cover; 8. Sliding bearing; 9. Bearing seat; 10. Fastener; 11. Hinge shaft retaining plate. Detailed Implementation

[0023] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. Example 1 This embodiment provides a hinge structure with a split self-lubricating end-face bearing, such as... Figures 1-3 As shown, it includes: a hinge plate 1, a boom structure 2 and an end face bearing 3, wherein the end face bearing 3 is disposed between the hinge plate 1 and the boom structure 2; The end face bearing 3 includes a lower end face bearing 5 that is snapped onto one side of the hinge plate 1. An upper end face bearing 6 is provided above the lower end face bearing 5. Both the upper end face bearing 6 and the lower end face bearing 5 are semi-circular and cooperate to form a circular ring structure. The boom hinge shaft 4 is installed in the circular ring structure. A bearing cover 7 is provided on the outer edge of the upper end face bearing 6 to fix the upper end face bearing 6 to the hinge plate 1. The bearing cover 7 is also a semi-circular ring with limit blocks at both ends for insertion into the limit grooves on the hinge plate 1. The bearing cover 7 is fixed to the hinge plate 1 by fasteners 10. Specifically, both the upper end bearing 6 and the lower end bearing 5 are semi-circular. The end bearing 3 adopts a split design, so the boom hinge shaft 4 does not need to be disassembled during installation. The lower end bearing 5 is simply rotated and pushed into the mounting structure on the hinge plate 1, and the upper end bearing 6 is fastened onto the boom hinge shaft 4. The upper end bearing 6 is then fixed by the bearing cover 7, so that the upper end bearing 6 and the lower end bearing 5 form a circular bearing structure. This can effectively improve the connection stability between the boom hinge shaft 4 and the end bearing 3, while shortening the installation and maintenance time.

[0025] As a further implementation, a hinge pin retaining plate 11 is provided on the other side of the hinge plate 1 to restrict the axial movement of the boom hinge pin 4; the two ends of the boom hinge pin 4 are stepped shafts, and the hinge pin retaining plate 11 is sleeved on the shaft head position of the stepped shaft to ensure the positional accuracy of the boom hinge pin 4 when the end face bearing 3 is severely worn, thereby reducing the impact on the maintenance process of the end face bearing 3.

[0026] As a further implementation, the hinge shaft retaining plate 11 has several flange holes near its edge, and the flange holes are evenly distributed. The flange holes are used to fix the hinge shaft retaining plate 11 to the hinge plate 1. The evenly distributed flange holes are fixed by multiple bolts, which can ensure the balanced force on the hinge shaft retaining plate 11, avoid local stress concentration, and at the same time ensure the axial stability of the boom hinge shaft 4.

[0027] As a further implementation, a through hole is provided at the center of the hinge shaft retaining plate 11. The through hole is used to install the shaft end of the boom hinge shaft 4, so as to ensure the positional accuracy of the boom hinge shaft 4 and reduce the impact on the maintenance process of the end face bearing 3.

[0028] As a further implementation, the hinge plate 1 is provided with a bearing seat 9, and the limiting hole is provided on the bearing seat 9. The bearing seat 9 is provided with a mounting groove that matches the size of the lower end face bearing 5 for mounting the lower end face bearing 5 and allowing the lower end face bearing 5 to rotate relative to the mounting groove. The mounting groove has an L-shaped cross-section, which allows the lower end face bearing 5 to be stably fixed on the hinge plate, while ensuring the stability of the upper end face bearing 6 and the lower end face bearing 5 during use, avoiding local wear failure of the upper end face bearing 6 and the lower end face bearing 5, and effectively ensuring the fatigue life of the end face bearing 3.

[0029] As a further implementation, the limiting block is a conical block, and the limiting groove is a conical hole. The positions of the limiting block and the limiting groove correspond to each other, achieving pre-positioning before the bearing cover 7 is fixed, avoiding displacement during installation and improving assembly efficiency. The depth of the conical hole is greater than the height of the conical block, which facilitates the positioning and fixing of the bearing cover 7. After the bearing cover 7 is assembled, a gap will be formed between the conical block and the bottom of the conical hole to prevent the bearing cover 7 from not being installed in place.

[0030] As a further implementation, a sliding bearing 8 is provided between the boom structure 2 and the boom hinge 4. The sliding bearing 8 is located between the end face bearings 3 at both ends of the boom structure 2. The sliding bearing 8 is also made of a self-lubricating alloy material to reduce the wear of the boom structure 2 on the boom hinge 4.

[0031] As a further implementation, the end-face bearing 3 is made of a polymer-based self-lubricating composite material. This composite material is made by mixing a polymer matrix and a nano-lubricant in a predetermined ratio. It is simple to manufacture, has strong wear resistance, good lubrication effect, and low noise. The polymer matrix is ​​made of ultra-high molecular weight polyethylene, polyetherketone, polyoxymethylene, polyamide, polyphenylene ether, and liquid crystal polymers. The nano-lubricant is made of graphene, SiO2, Al2O3, ZrO2, and carbon nanotubes.

[0032] Example 2 This embodiment provides a method for disassembling and assembling a hinged structure with a split self-lubricating end-face bearing, including the following steps: Step 1. Assemble the boom hinge pin 4 and boom structure 2 onto the hinge point plate, and install the hinge pin retaining plate 11; Step 2. Measure the dimensions of the two sets of gaps between the boom structure 2 and the hinge plate, determine the thickness of the end face bearing 3 based on the dimensions, and install each end face bearing 3 to the corresponding position according to its dimensions. Step 3. Snap the intact lower end bearing 5 onto the boom hinge 4, and then rotate and push it in until it completely overlaps with the mounting groove of the bearing seat 9; place the intact upper end bearing 6 on the boom hinge 4, so that the two ends of the upper end bearing 6 overlap with the two ends of the lower end bearing 5, and use fasteners 10 to fix the bearing cover 7 to the hinge plate. The installation is complete. Step 4. During disassembly, remove fastener 10, remove bearing cover 7 from hinge plate, remove the worn upper end face bearing 6, and use tools to rotate and push the worn lower end face bearing 5 out of the mounting groove of bearing seat 9. When the end face bearing needs maintenance and replacement, after completing step 4, you need to continue to perform steps 2 and 3.

[0033] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An articulated structure having split self-lubricating face bearings, characterised in that, include: The hinge plate, the boom structure, and the end face bearing, wherein the end face bearing is disposed between the hinge plate and the boom structure; The end face bearing includes a lower end face bearing snapped onto one side of the hinge plate, and an upper end face bearing disposed above the lower end face bearing. Both the upper and lower end face bearings are semi-circular and cooperate to form a circular ring structure. The boom hinge shaft is installed in the circular ring structure. A bearing cover is provided on the outer edge of the upper end face bearing to fix the upper end face bearing to the hinge plate. The bearing cover is also a semi-circular ring with limit blocks at both ends for insertion into the limit grooves on the hinge plate. The bearing cover is fixed to the hinge plate by fasteners.

2. An articulating structure having split self-lubricating end face bearings as claimed in claim 1, characterized in that A hinge pin retaining plate is provided on the other side of the hinge plate to limit the axial movement of the boom hinge pin.

3. An articulating structure having split self-lubricating face bearings as claimed in claim 2, wherein, The hinge pin retainer plate has several flange holes near its edge, and the flange holes are evenly distributed. The flange holes are used to fix the hinge pin retainer plate to the hinge plate by fasteners.

4. An articulating structure having split self-lubricating end face bearings as defined in claim 1, wherein The hinge pin retaining plate has a through hole at its center, which is used to install the end of the boom hinge pin.

5. An articulating structure having split self-lubricating end face bearings as defined in claim 1, wherein, The hinge plate is provided with a bearing seat, the limiting hole is provided on the bearing seat, and the bearing seat is provided with a mounting groove that matches the size of the lower end face bearing for mounting the lower end face bearing and enabling the lower end face bearing to rotate relative to the mounting groove. The mounting groove has a T-shaped cross-section.

6. An articulating structure having split self-lubricating end face bearings as defined in claim 1, wherein, The limiting block is a conical block, and the limiting groove is a conical hole. The positions of the limiting block and the limiting groove correspond to each other. The depth of the conical hole is greater than the height of the conical block, which facilitates the positioning and fixing of the bearing cover.

7. An articulating structure having split self-lubricating end face bearings as defined in claim 1, wherein, A sliding bearing is provided between the boom structure and the boom hinge shaft, and the sliding bearing is located between the end face bearings at both ends of the boom structure.

8. An articulating structure having split self-lubricating end face bearings as defined in claim 1, wherein, The end face bearing is made of a polymer-based self-lubricating composite material, which is made by mixing a polymer matrix and a nano-lubricant in a set ratio.

9. A method of disassembling an articulated structure having split self-lubricating end face bearings according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1. Assemble the boom hinge pin and boom structure onto the hinge point plate, and install the hinge pin retaining plate; Step 2. Measure the dimensions of the two sets of gaps between the boom structure and the hinge plate, determine the thickness of the end face bearings based on the dimensions, and install each end face bearing to the corresponding position according to its dimensions. Step 3. Snap the intact lower end bearing onto the boom hinge pin, and then rotate and push it in until it is completely aligned with the mounting groove of the bearing seat; place the intact upper end bearing on the boom hinge pin, so that the two ends of the upper end bearing are aligned with the two ends of the lower end bearing, and use fasteners to fix the bearing cap to the hinge plate. Installation is complete. Step 4. During disassembly, remove the fasteners, remove the bearing cover from the hinge plate, remove the worn upper end bearing, and use tools to rotate and push the worn lower end bearing out of the mounting slot of the bearing seat.

10. A method of disassembling an articulated structure having split self-lubricating end face bearings as claimed in claim 9, characterized in that, When the end face bearing needs maintenance, after completing step four, you must continue to perform steps two and three.

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