Polyurethane bumper for cranes

Abstract

The application provides a polyurethane buffer for a crane, relates to the technical field of buffers, and comprises a polyurethane buffer body, a connecting screw rod, a locking nut, a mounting groove, a limiting hole and a resisting rod. The application adopts the cooperative matching of vertical elastic sheets and V-shaped elastic sheets, so that the resisting rod can slide along the inner wall of the limiting hole and extend out of the surface of the connecting screw rod. The main purpose of this design is that when the resisting rod extends out, the locking nut that is screwed into the surface of the connecting screw rod and closely adheres to the end plate can be effectively resisted, so that loosening between the locking nut and the connecting screw rod is prevented. Compared with the traditional scheme, the design can effectively solve the problem of loosening of the locking nut caused by frequent collisions of the crane, significantly improves the stability and reliability of the polyurethane buffer installation, and reduces the safety risk in the operation process of the crane.

Description

Technical Field

[0001] This application relates to the field of buffer technology, and more particularly to a polyurethane buffer for cranes. Background Technology

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. Also known as an overhead crane, gantry crane, or hoist, it is widely used in the steel industry. Currently, to ensure the safety of crane operation, polyurethane buffers are typically installed on one side of the crane's rails.

[0003] In actual use, it was found that the polyurethane buffer is fixed to the rail end plate by passing a lead screw through a hole on one side of the rail with a nut. However, when the crane comes into contact with the polyurethane buffer repeatedly, this fixing method is prone to problems, which will cause the nut to gradually loosen. After the nut loosens, the connection of the polyurethane buffer becomes unstable, and thus it cannot play an effective protective role. Utility Model Content

[0004] This application provides a polyurethane buffer for cranes, which aims to solve the problem of unstable connection and protection failure caused by loose nuts due to frequent collisions with cranes in existing polyurethane buffers.

[0005] To address the aforementioned technical problems, this application provides a polyurethane buffer for cranes, comprising a polyurethane buffer body; a connecting screw fixedly connected to one end of the polyurethane buffer body, wherein a locking nut is threaded onto the surface of the connecting screw; and a mounting groove formed at one end of the connecting screw, wherein a pair of limiting holes are connected between the inner wall of the mounting groove and the surface of the connecting screw, and an abutment rod that engages with the locking nut in a first state and a second state is slidably connected to the inner wall of the limiting holes; in the first state, the abutment rod is retracted into the limiting holes, and the locking nut can freely screw in and out along the surface of the connecting screw; in the second state, the abutment rod extends from the limiting holes and protrudes from the surface of the connecting screw, thereby abutting against the locking nut screwed into the surface of the connecting screw.

[0006] In some implementations, the outer contour surface of the locking nut is provided with multiple driving surfaces. When the number of driving surfaces is six, the locking nut has a hexagonal structure.

[0007] In some implementations, the mounting groove is provided with two vertical elastic plates inside, the abutting rod is fixedly connected to the vertical elastic plates at one end of the mounting groove, and a V-shaped elastic plate is fixedly connected between the tops of the two vertical elastic plates.

[0008] In some implementations, the vertical elastic sheet extends to one side of the mounting slot port, with the extended portion reaching directly in front of the mounting slot port.

[0009] In some implementations, the surface of the V-shaped elastic sheet is fixedly connected to a positioning part that fits against the inner wall of the mounting groove.

[0010] In some implementations, the positioning part is a round rod structure.

[0011] In some implementations, when the positioning part is a square rod structure, a limiting frame that mates with the positioning part is fixedly connected to the inner wall of the mounting groove.

[0012] By adopting the above technical solution, this application has the following beneficial effects compared with the prior art:

[0013] This application employs a combination of vertical and V-shaped elastic plates to allow the contact rod to slide along the inner wall of the limiting hole and extend beyond the surface of the connecting screw. The main purpose of this design is to effectively abut the locking nut screwed into the surface of the connecting screw and tightly fitted to the end plate after the contact rod extends, thereby preventing loosening between the locking nut and the connecting screw. Compared with traditional solutions, this design effectively solves the problem of locking nut loosening due to frequent collisions with the crane, significantly improves the stability and reliability of the polyurethane buffer installation, and reduces safety risks during crane operation. Attached Figure Description

[0014] To more clearly illustrate the related technologies or the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the related technologies or the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application, and not all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a polyurethane buffer for a crane according to an embodiment of this application;

[0016] Figure 2 For this application Figure 1 Exploded view of the connection between the connecting screw and the locking nut;

[0017] Figure 3 For this application Figure 1 A cross-sectional view of the connection between the connecting screw and the locking nut.

[0018] Figure 4 For this application Figure 3 Exploded view of the connection between the central positioning part and the mounting slot Figure 1;

[0019] Figure 5 For this application Figure 3 Exploded view of the connection between the central positioning part and the mounting slot Figure 2 .

[0020] The labels in the above figures are as follows: 1. Polyurethane buffer body; 2. Connecting screw; 21. Mounting groove; 22. Limiting hole; 3. Locking nut; 31. Driving surface; 4. Abutting rod; 41. Vertical elastic plate; 42. V-shaped elastic plate; 5. Positioning part; 6. Limiting frame. Detailed Implementation

[0021] Example 1: Refer to Figure 1 A polyurethane buffer for cranes includes a polyurethane buffer body 1 and a connecting screw 2 fixedly connected to one end of the polyurethane buffer body 1. A locking nut 3 is threaded onto the surface of the connecting screw 2. The outer contour surface of the locking nut 3 is provided with multiple driving surfaces 31. When the number of driving surfaces 31 is six, the locking nut 3 has a hexagonal structure. In use, the connecting screw 2 is passed through the hole in the end plate on one side of the crane rail, and then the hexagonal locking nut 3 is screwed in along the surface of the connecting screw 2 until the locking nut 3 tightly abuts against the surface of the end plate, thereby fixing the polyurethane buffer body 1 to the end plate and thus protecting the crane.

[0022] In practical applications, considering that the locking nut 3 threaded onto the connecting screw 2 is prone to loosening due to frequent impacts when the crane repeatedly contacts and collides with the polyurethane buffer, once the locking nut 3 loosens, the polyurethane buffer body 1 may shift or wobble, failing to be stably fixed to the end plate, thus affecting its buffering protection effect on the crane, and may even lead to buffer failure, increasing the safety risks of crane operation. To solve this problem, refer to... Figures 1-5 This example also includes a mounting groove 21 opened at one end of the connecting screw 2. A pair of limiting holes 22 are connected between the inner wall of the mounting groove 21 and the surface of the connecting screw 2. The inner wall of the limiting holes 22 is slidably connected to an abutment rod 4 that is linked and cooperates with the locking nut 3 in the first state and the second state.

[0023] In the first state, the abutment rod 4 is retracted into the limiting hole 22. At this time, the locking nut 3 can be freely screwed in or out along the surface of the connecting screw rod 2. This design makes it easy to screw the locking nut 3 in along the surface of the connecting screw rod 2 to fix the polyurethane buffer body 1 on the end plate, thereby protecting the crane. When it is necessary to screw the locking nut 3 out along the surface of the connecting screw rod 2, it is also easy to replace the polyurethane buffer body 1.

[0024] In the second state, the abutment rod 4 extends out of the limiting hole 22 and protrudes from the surface of the connecting screw 2. At this time, the abutment rod 4 will abut against the locking nut 3 that is screwed into the surface of the connecting screw 2 and tightly attached to the end plate, to prevent the locking nut 3 from loosening with the connecting screw 2.

[0025] To achieve the function of the abutment rod 4 being housed within the limiting hole 22 or protruding from the surface of the connecting screw 2, two vertical elastic plates 41 are provided inside the mounting groove 21. One end of the abutment rod 4 is fixedly connected to the vertical elastic plate 41 in the mounting groove 21. A V-shaped elastic plate 42 is fixedly connected between the tops of the two vertical elastic plates 41. The vertical elastic plates 41 extend to one side of the port of the mounting groove 21, with the extended portion reaching the front of the port of the mounting groove 21. When the two vertical elastic plates 41 are pressed together by hand, the vertical elastic plates... The plate 41 and the V-shaped elastic plate 42 will deform and compress, thereby driving the abutment rod 4 to move along the inner wall of the limiting hole 22 until the abutment rod 4 is fully inserted into the limiting hole 22. At this time, the surface of the connecting screw 2 is no longer restricted by the abutment rod 4, and the locking nut 3 can freely screw in or out along the surface of the connecting screw 2. When the hand releases the two vertical elastic plates 41, the vertical elastic plates 41 and the V-shaped elastic plate 42 will deform and reset, pushing the abutment rod 4 to slide along the inner wall of the limiting hole 22, and finally causing the abutment rod 4 to extend out of the surface of the connecting screw 2.

[0026] Reference Figure 3 and Figure 4 The surface of the V-shaped elastic sheet 42 is fixedly connected to a positioning part 5 that fits against the inner wall of the mounting groove 21. The positioning part 5 is a round rod structure. The vertical elastic sheet 41 and the V-shaped elastic sheet 42 form an integral elastic structure. The positioning part 5 abuts against the inside of the mounting groove 21. This design can ensure that the abutting rod 4 fixed on the vertical elastic sheet 41 accurately corresponds to the position of the limiting hole 22, and also facilitates the subsequent replacement of the elastic structure.

[0027] Example 2: Refer to Figure 5 Based on the above embodiment one, the difference is that when the positioning part 5 is a square rod structure, the inner wall of the mounting groove 21 is fixedly connected to a limiting frame 6 that docks with the positioning part 5. When the positioning part 5 is inserted and fitted into the limiting frame 6, the positioning part 5, under the restriction of the limiting frame 6, can form a more precise positioning constraint than the positioning part 5 with a round rod structure directly abutting against the inner wall of the mounting groove 21. Since the edge of the square rod can form a clear contact surface with the inner wall of the limiting frame 6, the position of the entire elastic structure in the mounting groove 21 is more fixed and unique. This allows the abutting rod 4 fixed on the vertical elastic piece 41 to correspond to the limiting hole 22 more quickly and accurately, improving assembly efficiency and positioning accuracy.

[0028] It should be noted that the several embodiments shown above in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should also be noted that in the textual description of this application, 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 such an 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 may include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus; and, without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Furthermore, those skilled in the art can implement or use this application by practicing the several embodiments shown above. Various modifications to the embodiments shown above will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments not shown without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the several embodiments shown above, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A polyurethane buffer for cranes, comprising: Polyurethane buffer (1); A connecting screw (2) is fixedly connected to one end of the polyurethane buffer body (1), and a locking nut (3) is threaded onto the surface of the connecting screw (2); characterized in that it further includes: A mounting groove (21) is provided at one end of the connecting screw (2). A pair of limiting holes (22) are connected between the inner wall of the mounting groove (21) and the surface of the connecting screw (2). The inner wall of the limiting hole (22) is slidably connected to an abutting rod (4) that is linked and cooperates with the locking nut (3) in the first and second states. In the first state, the abutting rod (4) is housed in the limiting hole (22), and the locking nut (3) can freely screw in and out along the surface of the connecting screw (2); In the second state, the abutting rod (4) extends out of the limiting hole (22) and protrudes from the surface of the connecting screw (2) to abut against the locking nut (3) screwed into the surface of the connecting screw (2).

2. The polyurethane buffer for cranes according to claim 1, characterized in that, The outer contour surface of the locking nut (3) is provided with multiple driving surfaces (31). When the number of driving surfaces (31) is six, the locking nut (3) has a hexagonal structure.

3. The polyurethane buffer for cranes according to claim 1, characterized in that, The mounting groove (21) is provided with two vertical elastic plates (41). The abutment rod (4) is fixedly connected to one end of the mounting groove (21) on the vertical elastic plate (41). A V-shaped elastic plate (42) is fixedly connected between the tops of the two vertical elastic plates (41).

4. The polyurethane buffer for cranes according to claim 3, characterized in that, The vertical elastic sheet (41) extends on one side of the port of the mounting groove (21), with its extended portion reaching the front of the port of the mounting groove (21).

5. The polyurethane buffer for cranes according to claim 3, characterized in that, The surface of the V-shaped elastic sheet (42) is fixedly connected to a positioning part (5) that fits against the inner wall of the mounting groove (21).

6. The polyurethane buffer for cranes according to claim 5, characterized in that, The positioning part (5) is a round rod structure.

7. The polyurethane buffer for cranes according to claim 5, characterized in that, When the positioning part (5) is a square rod structure, the inner wall of the mounting groove (21) is fixedly connected with a limiting frame (6) that docks with the positioning part (5).

Images