A crane hinge point support device

Abstract

The utility model discloses a crane hinge point supporting device, including support seat and hinge point axle, the inside of support seat is provided with mounting hole, the wear -resisting cover fixedly is inlayed in mounting hole, hinge point axle is worn in wear -resisting cover, and hinge point axle and wear -resisting cover gap cooperation, be provided with buffer assembly between hinge point axle and support seat, buffer assembly includes movable ring and a plurality of sets of elastic buffer piece, the inner wall of movable ring is fixedly connected with wear -resisting cover, the outer ring of movable ring is provided with a plurality of fixed grooves, and one end of elastic buffer piece is inserted in fixed groove, the outer ring of elastic buffer piece is provided with bearing, the inner ring of bearing and the one end of elastic buffer piece are mutually abutted, be provided with the installation groove of being used for installing bearing on support seat, be provided with reinforcing component on support seat. The utility model passes through the elastic deformation of elastic buffer piece and absorbs vibration energy, reduces the vibration at hinge point, prolongs the service life of device.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically to a crane hinge point support device. Background Technology

[0002] Cranes are widely used in engineering construction, logistics handling, and other fields. The hinge support device is one of the core load-bearing components of a crane, mainly used to realize the relative rotation between the boom and the slewing platform and to transfer loads. Existing crane hinge support devices have several shortcomings in use: First, the support structure has poor wear resistance. After long-term exposure to alternating loads and friction, wear gaps easily appear, leading to loose connections and affecting the crane's operational stability. Second, the buffering performance is insufficient. When the crane starts, brakes, or is subjected to impact loads, severe vibrations easily occur at the hinge point, which not only reduces the service life of the device but may also cause safety hazards.

[0003] To address the aforementioned issues, there is an urgent need to design a crane hinge support device with good wear resistance and excellent buffering performance to improve the operational safety and economic efficiency of cranes. Utility Model Content

[0004] The purpose of this utility model is to provide a crane hinge support device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a crane hinge point support device, comprising a support base and a hinge point shaft. The support base has an internal mounting hole, and a wear-resistant sleeve is fixedly embedded in the mounting hole. The hinge point shaft passes through the wear-resistant sleeve, and the hinge point shaft and the wear-resistant sleeve are in clearance fit. A buffer assembly is provided between the hinge point shaft and the support base. The buffer assembly includes a movable ring and several sets of elastic buffer elements. The inner wall of the movable ring is fixedly connected to the wear-resistant sleeve. The outer ring of the movable ring has several fixing grooves. One end of each elastic buffer element is inserted into a fixing groove. A bearing is provided on the outer ring of the elastic buffer element, and the inner ring of the bearing abuts against one end of the elastic buffer element. The support base has a mounting groove for mounting the bearing. A reinforcing assembly is provided on the support base. The reinforcing assembly includes a reinforcing rod and a fixing nut. The support base includes a base plate and a connecting plate. The connecting plate is fixedly installed on both sides of the base plate. The reinforcing rod has a U-shaped structure and is sleeved on the outside of the connecting plate. The other end of the reinforcing rod is detachably connected to the base plate.

[0006] Preferably, the wear-resistant sleeve is made of high-strength ceramic matrix composite material, and an annular oil groove is formed on its inner wall. The annular oil groove is evenly distributed along the axial direction of the wear-resistant sleeve, and the annular oil groove is filled with solid grease.

[0007] Preferably, connecting ears are symmetrically fixedly installed on both sides of the base plate, and connecting ears are provided with connecting holes.

[0008] Preferably, one end of the reinforcing rod is provided with a threaded post, and the fixing nut is installed on the threaded post.

[0009] Preferably, the bottom of the base plate is provided with an embedded groove, and the two sides of the base plate are provided with mating holes, and one end of the reinforcing rod is inserted into the mating hole.

[0010] Preferably, the elastic buffer is a cylindrical rubber buffer block, one end of which is fixed in the fixing groove of the outer ring of the movable ring by interference fit, and the other end is in close contact with the end face of the inner ring of the bearing.

[0011] Preferably, the bearing is a self-aligning roller bearing, and its outer ring is interference-fitted with the mounting groove on the support.

[0012] Preferably, dustproof sealing caps are provided at both ends of the wear-resistant sleeve, and the inner ring of the dustproof sealing cap is tightly fitted to the outer wall of the hinge shaft.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model effectively improves the wear resistance between the hinge shaft and the support by setting a wear-resistant sleeve in the mounting hole of the support, avoiding the problem of increased gap due to wear after long-term use, and ensuring the stability of crane operation.

[0014] 2. The buffer component of this utility model can absorb vibration energy through the elastic deformation of the elastic buffer when the crane starts, brakes or is subjected to impact load, thereby reducing vibration at the hinge point and extending the service life of the device.

[0015] 3. The reinforcing component of this utility model adopts a U-shaped reinforcing rod sleeved on the outside of the connecting plate and is detachably connected to the base plate, which enhances the overall structural strength of the support and improves the load-bearing capacity of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a schematic diagram of the wear-resistant sleeve structure of this utility model; Figure 4 This is a schematic diagram of the external structure of the support base of this utility model.

[0017] In the diagram: 1. Support base; 2. Hinge shaft; 3. Mounting hole; 4. Wear-resistant sleeve; 5. Movable ring; 6. Elastic buffer; 7. Fixing groove; 8. Bearing; 9. Reinforcing rod; 10. Fixing nut; 11. Base plate; 12. Connecting plate; 13. Annular oil groove; 14. Connecting ear; 15. Groove; 16. Mating hole; 17. Dustproof sealing cover. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 This utility model provides a technical solution: a crane hinge point support device, including a support base 1 and a hinge point shaft 2. The support base 1 has an internal mounting hole 3, and a wear-resistant sleeve 4 is fixedly embedded in the mounting hole 3. The hinge point shaft 2 passes through the wear-resistant sleeve 4, and the hinge point shaft 2 and the wear-resistant sleeve 4 are clearance-fitted. A buffer assembly is provided between the hinge point shaft 2 and the support base 1. The buffer assembly includes a movable ring 5 and several sets of elastic buffer members 6. The inner wall of the movable ring 5 is fixedly connected to the wear-resistant sleeve 4, and the outer ring of the movable ring 5 is provided with several fixing grooves 7. One end of the elastic buffer member 6... Inserted into the fixing groove 7, the outer ring of the elastic buffer 6 is provided with a bearing 8, and the inner ring of the bearing 8 abuts against one end of the elastic buffer 6. The support base 1 is provided with a mounting groove for installing the bearing 8. The support base 1 is provided with a reinforcing component, which includes a reinforcing rod 9 and a fixing nut 10. The support base 1 includes a base plate 11 and a connecting plate 12. The connecting plate 12 is fixedly installed on both sides of the base plate 11. The reinforcing rod 9 has a U-shaped structure and is sleeved on the outside of the connecting plate 12. The other end of the reinforcing rod 9 is detachably connected to the base plate 11.

[0020] Furthermore, the wear-resistant sleeve 4 is made of high-strength ceramic matrix composite material, and an annular oil groove 13 is formed on its inner wall. The annular oil groove 13 is evenly distributed along the axial direction of the wear-resistant sleeve 4, and the annular oil groove 13 is filled with solid grease.

[0021] In this embodiment, the solid grease in the annular oil groove 13 can form a continuous and stable lubricating film between the hinge shaft 2 and the wear-resistant sleeve 4, reducing dry friction.

[0022] Furthermore, connecting ears 14 are symmetrically fixedly installed on both sides of the base plate 11. The connecting ears 14 are provided with connecting holes, and the connecting ears 14 can be securely connected to the slewing platform of the crane or other basic components by bolts.

[0023] Furthermore, one end of the reinforcing rod 9 is provided with a threaded post, and the fixing nut 10 is installed on the threaded post.

[0024] In this embodiment, after the U-shaped open end of the reinforcing rod 9 is fitted onto the outer side of the connecting plates 12 on both sides, the threaded post at its end can extend through the mating holes 16 on both sides of the base plate 11 into the groove 15. By tightening the fixing nut 10, the reinforcing rod 9 can be firmly locked onto the support base 1, so that the connecting plates 12 on both sides are subjected to an inward preload, which effectively enhances the overall resistance to lateral deformation of the support base 1. Especially when the crane boom is subjected to lateral load, stress concentration can be avoided at the weld between the connecting plate 12 and the base plate 11.

[0025] Furthermore, the bottom of the base plate 11 is provided with an embedded groove 15, and the two sides of the base plate 11 are provided with mating holes 16. One end of the reinforcing rod 9 is inserted into the mating hole 16. When the fixing nut 10 is tightened, its top will not exceed the bottom surface of the base plate 11, ensuring the flatness of the support device during installation.

[0026] Furthermore, the elastic buffer 6 is a cylindrical rubber buffer block, one end of which is fixed in the fixing groove 7 of the outer ring of the movable ring 5 by interference fit, and the other end is in close contact with the end face of the inner ring of the bearing 8.

[0027] In this embodiment, when the crane starts, brakes, or the boom swings to generate an impact load, the axial movement of the hinge shaft 2 is transmitted to the moving ring 5 through the wear-resistant sleeve 4, and then the elastic buffer 6 converts the impact energy into elastic potential energy, effectively attenuating the vibration amplitude.

[0028] Furthermore, the bearing 8 is a self-aligning roller bearing, and its outer ring is interference-fitted with the mounting groove on the support seat 1. The bearing 8 can adjust the position of the buffer assembly to prevent severe local wear.

[0029] Furthermore, dustproof sealing caps 17 are provided at both ends of the wear-resistant sleeve 4, and the inner ring of the dustproof sealing cap 17 is tightly fitted to the outer wall of the hinge shaft 2.

[0030] In this embodiment, the dustproof sealing cover 17 can effectively prevent external dust, sand, rainwater and other impurities from entering the wear-resistant sleeve 4.

[0031] Working principle: During crane operation, when the boom drives the hinge shaft 2 to rotate, a lubrication layer is formed between the hinge shaft 2 and the wear-resistant sleeve 4 through the solid grease in the annular oil groove 13, reducing friction loss. The wear-resistant sleeve 4, made of high-strength ceramic matrix composite material, can withstand the wear of long-term alternating loads, extending the service life of the device. If the crane starts, brakes, or is subjected to impact loads, the axial impact force of the hinge shaft 2 will be transmitted to the movable ring 5 through the wear-resistant sleeve 4. The movable ring 5 drives the elastic buffer 6 to compress. The cylindrical rubber buffer block absorbs the impact energy through its own elastic deformation. At the same time, the self-aligning roller bearing 8 can adapt to the slight wobble of the hinge shaft 2, avoiding stress concentration. The U-shaped reinforcing rod 9 in the reinforcing assembly can effectively disperse the lateral load borne by the connecting plate 12, preventing the connecting plate 12 from deforming due to excessive force, and ensuring the structural stability of the support base 1. In addition, the connecting ears 14 on both sides of the base plate 11 can be fixedly connected to the crane slewing platform with bolts.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crane hinge support device, comprising a support base (1) and a hinge shaft (2), characterized in that: The support base (1) has an installation hole (3) inside, and the wear-resistant sleeve (4) is fixedly embedded in the installation hole (3). The hinge shaft (2) passes through the wear-resistant sleeve (4), and the hinge shaft (2) and the wear-resistant sleeve (4) are clearance-fitted. A buffer assembly is provided between the hinge shaft (2) and the support base (1). The buffer assembly includes a movable ring (5) and several sets of elastic buffer members (6). The inner wall of the movable ring (5) is fixedly connected to the wear-resistant sleeve (4). The outer ring of the movable ring (5) is provided with several fixing grooves (7). One end of the elastic buffer member (6) is inserted into the fixing groove (7). The outer ring of the elastic buffer member (6) is... A bearing (8) is provided, the inner ring of which abuts against one end of an elastic buffer (6). A mounting groove for mounting the bearing (8) is provided on the support base (1). A reinforcing component is provided on the support base (1), the reinforcing component including a reinforcing rod (9) and a fixing nut (10). The support base (1) includes a base plate (11) and a connecting plate (12). The connecting plate (12) is fixedly installed on both sides of the base plate (11). The reinforcing rod (9) has a U-shaped structure. The reinforcing rod (9) is sleeved on the outside of the connecting plate (12), and the other end of the reinforcing rod (9) is detachably connected to the base plate (11).

2. The crane hinge point support device according to claim 1, characterized in that: The wear-resistant sleeve (4) is made of high-strength ceramic matrix composite material, and an annular oil groove (13) is provided on its inner wall. The annular oil groove (13) is evenly distributed along the axial direction of the wear-resistant sleeve (4), and the annular oil groove (13) is filled with solid grease.

3. A crane hinge point support device according to claim 2, characterized in that: Connecting ears (14) are symmetrically fixedly installed on both sides of the base plate (11), and connecting holes are provided on the connecting ears (14).

4. A crane hinge point support device according to claim 3, characterized in that: One end of the reinforcing rod (9) is provided with a threaded post, and the fixing nut (10) is installed on the threaded post.

5. A crane hinge point support device according to claim 4, characterized in that: The bottom of the base plate (11) is provided with an embedded groove (15), and the two sides of the base plate (11) are provided with mating holes (16). One end of the reinforcing rod (9) is inserted into the mating hole (16).

6. A crane hinge point support device according to claim 5, characterized in that: The elastic buffer (6) is a cylindrical rubber buffer block. One end of it is fixed in the fixing groove (7) of the outer ring of the movable ring (5) by interference fit, and the other end is in close contact with the end face of the inner ring of the bearing (8).

7. A crane hinge point support device according to claim 6, characterized in that: The bearing (8) is a self-aligning roller bearing, and its outer ring is interference-fitted with the mounting groove on the support seat (1).

8. A crane hinge point support device according to claim 7, characterized in that: Dustproof sealing caps (17) are provided at both ends of the wear-resistant sleeve (4), and the inner ring of the dustproof sealing cap (17) is tightly fitted to the outer wall of the hinge shaft (2).

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