Multi-pin-shaft axial limiting quick disassembly and assembly structure

Abstract

The utility model belongs to the technical field of hoisting machinery, and relates to a multi-pin shaft axial limiting quick dismounting and mounting structure which comprises a limiting assembly used for fixing pin shafts, the limiting assembly comprises a circular-ring-shaped axial baffle and a fastening bolt, the plate face of the axial baffle is attached to the peripheral face of the pin shaft connecting position of a slewing bearing and a seat ring, and the fastening bolt is connected with the limiting assembly. Positioning holes and mounting holes are evenly formed in the circumferential side wall of the axial baffle, the positioning holes correspond to pin shaft holes of the slewing bearing and the seat ring, and a pin pulling bolt connected with a quick pin puller is arranged on the end face, close to the outer circumferential face of the pin shaft connecting position, of the pin shaft. The fastening bolt fixes the axial baffle to the peripheral face of the joint of the pin shaft through the mounting hole, and the axial baffle rotates clockwise and anticlockwise to achieve axial limiting unlocking or axial limiting locking of the pin shaft. And the requirement of a kiloton mobile crane for quick disassembly and assembly of axial limiting of multiple pin shafts connected with the slewing bearing and the seat ring is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hoisting machinery technical field relates to a kind of multi-pin shaft axial limit quick dismounting structure. BACKGROUND

[0002] Mobile crane is divided into upper and lower car structure according to structure function, and the upper car is mainly used for lifting and hoisting, and the lower car is mainly used for road driving, and auxiliary support function is provided for upper car operation, and the component responsible for the connection between the upper and lower cars is called slewing bearing, and the slewing bearing of the mobile crane is usually fixedly connected with the bottom plate of the upper car rotating table structure and the seat ring of the lower car frame by fastening bolts. With the continuous development of large-tonnage cranes, the weight and height of the mobile crane are continuously increasing. In order to meet the requirements of the crane weight and driving height in the road state, the slewing bearing installation structure of the connection part between the upper and lower cars of the thousand-ton mobile crane needs to be designed as a quick dismounting structure. At present, the connection mode between the slewing bearing and the lower car frame seat ring of the thousand-ton mobile crane is changed, that is, the direct fastening connection between the slewing bearing and the lower car frame is changed into the quick pin connection between the slewing bearing and the seat ring, and the seat ring and the lower car frame are fastened by bolts. In order to ensure the bearing capacity of the connection between the slewing bearing and the seat ring, the number of pin shafts of the slewing bearing and the seat ring is usually large, and the synchronous insertion and extraction of the pin shafts is realized by the synchronous quick push-pull of multiple small oil cylinders. Although the synchronous quick insertion and extraction of the pin shafts is realized, the axial fixing device of the pin shafts still needs to be manually dismounted and mounted for many times, and the quick dismounting technology of the axial limiting device of the multiple pin shafts of the connection between the slewing bearing and the seat ring needs to be further researched and improved.

[0003] Patent 1 (CN117720029A) and patent 2 (CN102444666B) are about the new slewing bearing structure design of large equipment which needs to quickly dismount the upper operation part, and both consider that the connection between the slewing bearing and the rotating table and the frame is connected by multiple pin shafts and transition seat ring, and the quick dismounting is realized by the quick dismounting of multiple pin shafts, but the quick dismounting of the axial limiting device of the multiple pin shafts is not considered in the scheme. The characteristics of patent 1 and patent 2 are to realize the installation and removal of the axial limiting of the multiple pin shafts of the connection between the slewing bearing and the seat ring, which needs multiple bolt and shaft baffle dismounting work, and the dismounting efficiency is low, which affects the quick dismounting efficiency.

[0004] In the patent 3 (CN206219094U) a kind of vehicle and its slewing bearing device, quick clamping part (such as Figure 3The first method involves quick installation via a rotating snap-fit ​​mechanism, but requires multiple fixing blocks to be installed with bolts. Although Patent 3 designs a structure for quick installation via a rotating snap-fit ​​mechanism, eliminating the need for inserting and removing pins, it still requires removing and installing the mounting bolts of the limiting blocks, failing to consider more efficient installation and removal methods to avoid repeated disassembly and assembly. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a multi-pin axial limiting quick disassembly and assembly structure, which meets the quick disassembly and assembly requirements of thousand-ton mobile cranes for the multi-pin axial limiting of the connection between the slewing bearing and the seat ring.

[0006] The technical solution provided by this utility model is as follows:

[0007] This utility model provides a multi-pin axial limiting quick disassembly and assembly structure, including a limiting component for fixing the pins. The limiting component includes an annular axial baffle and a fastening bolt. The surface of the axial baffle is in contact with the outer peripheral surface of the pin connection between the slewing bearing and the seat ring. The circumferential sidewall of the axial baffle is uniformly provided with positioning holes and mounting holes. The positioning holes correspond to the pin holes of the slewing bearing and the seat ring. A pin-pulling bolt connected to a quick pin-pulling device is provided on the end face of the pin near the outer peripheral surface of the pin connection. The fastening bolt fixes the axial baffle to the outer peripheral surface of the pin connection through the mounting holes. The axial baffle can achieve axial limiting unlocking or axial limiting locking of the pin by rotating clockwise or counterclockwise.

[0008] Furthermore, the positioning hole includes a first hole and a second hole that are interconnected. The first hole is located to the right of the second hole, and the diameter of the first hole is smaller than the diameter of the second hole. The fastening bolt can pass through the second hole, and the maximum width of the fastening bolt is greater than the diameter of the first hole. The mounting hole includes a third hole and a fourth hole that are interconnected. The third hole is located to the right of the fourth hole, and the diameter of the third hole is smaller than the diameter of the fourth hole. The pull-out bolt passes through the fourth hole and is confined in the third hole.

[0009] Furthermore, the positioning holes are circumferentially arranged on the lower edge of the axial baffle sidewall, and the mounting holes are circumferentially arranged at the middle position of the axial baffle sidewall.

[0010] Furthermore, the number of positioning holes is less than the number of mounting holes and they are evenly distributed below the interval between two mounting holes.

[0011] Furthermore, a locking washer is provided between the fastening bolt and the axial baffle.

[0012] Furthermore, the axial baffle is provided with a handle.

[0013] Furthermore, the axial baffle is formed by at least two arc-shaped plates fixedly connected together.

[0014] Furthermore, the axial baffle is a one-piece molded structure.

[0015] Beneficial effects

[0016] This invention features a circular axial baffle that tightly fits the outer circumference of the pin connection between the slewing bearing and the seat ring. The corresponding design of the positioning hole and the pin hole allows for precise pin positioning. The pin-pulling bolt facilitates connection with a quick pin puller, enabling rapid pin removal and installation. The clockwise and counterclockwise rotation of the axial baffle unlocks or locks the pin, greatly improving the convenience of disassembly and assembly and the stability of axial positioning.

[0017] This utility model presents an innovative multi-pin axial limiting quick disassembly and assembly structure with an overall horizontal rotation structure. Through the overall left and right rotation design, the multi-pin axial limiting structure allows for quick disassembly and assembly without the need for multiple up and down pushing and repeated disassembly and assembly. This design saves on operational waste, improves disassembly and assembly efficiency, and reduces and optimizes the cost of use. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the multi-pin shaft axial limiting quick disassembly and assembly structure of this utility model;

[0019] Figure 2 This is a diagram showing the locking and unlocking positions of the multi-pin axial limiting quick-disassembly and assembly structure of this utility model;

[0020] Figure 3 This is a diagram of the existing slewing bearing and its rotating engagement structure (1. Slewing bearing; 2. Support; 11. Inner ring of slewing bearing; 12. Outer ring of slewing bearing; 13. Engagement between slewing bearing and turntable; 131. Support boss; 132. Support corner; 21. Stop block mounting seat; 22. Stop block; 23. Support boss; 24. Support corner).

[0021] Explanation of reference numerals in the attached drawings: 2. Slewing bearing; 4. Fastening bolt; 5. Axial baffle; 6. Pin; 7. Seat ring. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example 1

[0026] like Figures 1-2 As shown, this utility model provides a multi-pin axial limiting quick disassembly and assembly structure, including a limiting component for fixing the pin 6. The limiting component includes an annular axial baffle 5 and a fastening bolt 4. The surface of the axial baffle 5 is in contact with the outer peripheral surface of the pin connection between the slewing bearing 2 and the seat ring 7. The circumferential sidewall of the axial baffle 5 is uniformly provided with positioning holes and mounting holes. The positioning holes correspond to the pin holes of the slewing bearing 2 and the seat ring 7. The end face of the pin 6 near the outer peripheral surface of the pin connection is provided with a pin-pulling bolt connected to a quick pin puller. The fastening bolt 4 fixes the axial baffle 5 to the outer peripheral surface of the pin connection through the mounting holes. The axial baffle 5 can achieve axial limiting unlocking or axial limiting locking of the pin by rotating clockwise or counterclockwise.

[0027] This invention features a circular axial baffle that tightly fits the outer circumference of the pin connection between the slewing bearing and the seat ring. The corresponding design of the positioning hole and the pin hole allows for precise pin positioning. The pin-pulling bolt facilitates connection with a quick pin puller, enabling rapid pin removal and installation. The clockwise and counterclockwise rotation of the axial baffle unlocks or locks the pin, greatly improving the convenience of disassembly and assembly and the stability of axial positioning.

[0028] Example 2

[0029] like Figures 1-2 As shown, this utility model provides a multi-pin axial limiting quick-release structure, including a limiting component, a slewing bearing 2, a pin 6, and a seat ring 7. The limiting component is used to fix the pin 6. The limiting component includes an axial baffle 5 and a fastening bolt 4. The surface of the axial baffle 5 is in contact with the outer peripheral surface of the pin connection between the slewing bearing 2 and the seat ring 7. The circumferential sidewall of the axial baffle 4 is evenly provided with positioning holes and mounting holes. The positioning holes correspond to the pin holes of the slewing bearing 2 and the seat ring 7. The end face of the pin 6 near the outer peripheral surface of the pin connection is provided with a pin-pulling bolt that connects to a quick pin puller. The fastening bolt 4 fixes the axial baffle 5 to the outer peripheral surface of the pin connection through the mounting holes. The axial baffle can achieve axial limiting unlocking or axial limiting locking of the pin by rotating clockwise or counterclockwise. When installing the slewing bearing 2 and the seat ring 7, first place the axial baffle 5 around the seat ring in a low position. Then, raise the axial baffle 5 to the height position aligned with the mounting holes of the fastening bolts 4, ensuring that the positioning holes of the axial baffle 5 are aligned with the pin holes. Secure the fastening bolts 4. After all the pins 6 are fixed, push the axial baffle 5 to rotate counterclockwise (see...). Figure 2 (See locking position diagram) to achieve axial locking of the pin. When quick disassembly and assembly of the slewing bearing 2 and the seat ring 7 are required, without needing to repeatedly disassemble and assemble other parts, only the axial baffle 5 needs to be pushed clockwise as a whole (see...). Figure 2 (Unlock position diagram). After unlocking the axial limit of the pin, all pins 6 between the slewing bearing and the seat ring can be quickly pulled out using a quick pin puller, thus disassembling the slewing bearing and the seat ring 7.

[0030] In this embodiment, the positioning hole includes a first hole and a second hole that are interconnected. The first hole is located to the right of the second hole, and the diameter of the first hole is smaller than the diameter of the second hole. The fastening bolt can pass through the second hole, and the maximum width of the fastening bolt 4 is greater than the diameter of the first hole. The mounting hole includes a third hole and a fourth hole that are interconnected. The third hole is located to the right of the fourth hole, and the diameter of the third hole is smaller than the diameter of the fourth hole. The pull-out bolt passes through the fourth hole and is confined in the third hole.

[0031] In this embodiment, the positioning holes are arranged circumferentially on the lower edge of the side wall of the axial baffle 5, and the mounting holes are arranged circumferentially at the middle position of the side wall of the axial baffle 5.

[0032] In this embodiment, the number of positioning holes is less than the number of mounting holes and they are evenly distributed below the interval between two mounting holes.

[0033] In this embodiment, a locking washer is provided between the fastening bolt 4 and the axial baffle 5. Adding a locking washer to the fastening bolt prevents it from loosening due to vibration or external force during use, ensuring the stability and safety of the structure.

[0034] In this embodiment, the axial baffle 5 is provided with a handle. If there is no suitable point of force for the rotation of the axial baffle in this utility model, a fixed handle or a simple handle can be designed to facilitate the overall rotation of the axial baffle.

[0035] In this embodiment, the axial baffle is formed by fixing at least two arc-shaped plates together or by integral molding. If manufacturing limitations prevent the design of the overall axial baffle structure of this utility model, it can also be made into a multi-piece arc-shaped plate assembly design. Only the lateral connection and installation of the multiple arc-shaped plates needs to be considered. This can be achieved through mounting hole bolt connections or snap-fit ​​connections. Once assembled into a unified system, multiple disassembly and reassembly are unnecessary.

[0036] Key terms:

[0037] Mobile cranes: These are boom-type cranes that can be equipped with columns (towers) and can travel along trackless surfaces with or without load, while maintaining stability by their own weight.

[0038] Slewing bearing: A load-bearing component that connects the working part and the traveling part of a crane.

[0039] Seat ring: A component connecting the slewing bearing and chassis structure of a crane, used for the transition between operation and travel.

[0040] Turntable: The main load-bearing structural component of the upper working part of the crane.

[0041] Chassis: The main load-bearing structural component of the crane's traveling and operating chassis.

[0042] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. A multi-pin axial limiting quick-assembly and disassembly structure, characterized in that, The device includes a limiting assembly for fixing a pin. The limiting assembly includes an annular axial baffle and a fastening bolt. The surface of the axial baffle is in contact with the outer peripheral surface of the pin connection between the slewing bearing and the seat ring. The circumferential sidewall of the axial baffle is uniformly provided with positioning holes and mounting holes. The positioning holes correspond to the pin holes of the slewing bearing and the seat ring. A pin-pulling bolt for quick pin-pulling is provided on the end face of the pin near the pin connection. The fastening bolt fixes the axial baffle to the outer peripheral surface of the pin connection through the mounting holes. The axial baffle can achieve axial limiting unlocking or axial limiting locking of the pin by rotating clockwise or counterclockwise.

2. The multi-pin axial limiting quick-assembly and disassembly structure according to claim 1, characterized in that, The positioning hole includes a first hole and a second hole that are interconnected. The first hole is located to the right of the second hole. The diameter of the first hole is smaller than that of the second hole. The fastening bolt can pass through the second hole. The maximum width of the fastening bolt is greater than that of the first hole. The mounting hole includes a third hole and a fourth hole that are interconnected. The third hole is located to the right of the fourth hole. The diameter of the third hole is smaller than that of the fourth hole. The pull-out bolt passes through the fourth hole and is confined in the third hole.

3. The multi-pin axial limiting quick-assembly and disassembly structure according to claim 1, characterized in that, The positioning holes are arranged circumferentially on the lower edge of the axial baffle sidewall, and the mounting holes are arranged circumferentially at the middle position of the axial baffle sidewall.

4. The multi-pin axial limiting quick-assembly and disassembly structure according to claim 3, characterized in that, The number of positioning holes is less than the number of mounting holes and they are evenly distributed below the interval between two mounting holes.

5. The multi-pin axial limiting quick-assembly and disassembly structure according to claim 1, characterized in that, A locking washer is provided between the fastening bolt and the axial baffle.

6. The multi-pin axial limiting quick-assembly and disassembly structure according to claim 1, characterized in that, The axial baffle is provided with a handle.

7. The multi-pin axial limiting quick-assembly and disassembly structure according to claim 1, characterized in that, The axial baffle is formed by at least two arc-shaped plates fixedly connected together.

8. The multi-pin axial limiting quick-assembly and disassembly structure according to claim 1, characterized in that, The axial baffle is a one-piece molded structure.

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