Rail-biting prevention device for crane trolley and installation method

Abstract

A crane trolley anti-rail-chewing device and its installation method include a support vertical plate A, a support horizontal plate, a support vertical plate B, horizontal guide wheels, a buffer, and support ribs. The support vertical plate A is fixed to the crane end beam. Two horizontal guide wheels are fixed to the lower end of the support horizontal plate, with the horizontal guide wheels on both sides of the track. The buffer is fixed to the support vertical plate B via a buffer flange seat. Two support ribs are installed on the back of the buffer flange seat and connected to the support vertical plate A via the support ribs. The installation method of the crane trolley anti-rail-chewing device includes the following steps: 1) checking for obstructions on the crane trolley track; 2) confirming whether the crane trolley exhibits rail-chewing behavior; 3) installing the anti-derailment device.

Description

Technical Field

[0001] This invention relates to the field of crane safety protection devices, and more specifically, to a crane trolley anti-rail-biting device and its installation method. Background Technology

[0002] Cranes are used for vertically lifting and horizontally moving goods to meet the requirements of loading, unloading, transferring, and installing heavy objects. Under normal conditions, the tread of the crane's main wheels is 30-40mm wider than the rail head, and the wheels run in the middle of the tread, maintaining a certain distance between the wheel flange and the rail. Due to various reasons, sliding friction occurs between the crane wheel flange and the side of the rail, forcing the crane to pass through. This sliding friction contact phenomenon is called rail biting. Rail biting of the crane's main wheel intensifies the friction between the wheel flange and the side of the rail, damaging crane components. Severe rail biting can lead to major crane safety accidents.

[0003] Existing technologies for resolving crane trolley rail wear problems are relatively outdated, such as:

[0004] (1) No active rail-biting prevention device was installed on the crane;

[0005] (2) In the past, each rail wear failure required the inspection and adjustment of various crane components such as fasteners, rails, wheels, brakes, drive shafts, reducers and drive motors.

[0006] (3) The existing technology does not completely solve the problem of rail wear on the crane and does not prevent the recurrence of rail wear on the crane.

[0007] (4) The original technology has many troubleshooting steps, takes a long time, requires a lot of manpower and material resources, and affects the user's normal production and hoisting rhythm. Summary of the Invention

[0008] The purpose of this invention is to address the numerous shortcomings of the existing method of repairing cranes after rail wear, such as:

[0009] (1) Crane trolley rail wear failure has many influencing factors, is difficult to eradicate, and is prone to recurrence.

[0010] (2) Repairing rail wear faults requires troubleshooting and adjusting various faults, such as: track problems, wheel problems, reducer problems, deviation of the factory rail support beam, brake problems, drive shaft problems, and drive motor problems. Troubleshooting involves many steps, is time-consuming, requires a lot of manpower and resources, and affects the user's normal production and hoisting rhythm.

[0011] (3) No device was installed on the crane to actively prevent rail wear.

[0012] The purpose of this invention is to address the shortcomings of existing methods by providing a crane trolley anti-rail-biting device and installation method. This involves installing anti-rail-biting devices of matching dimensions at the four trolley end beam cover plates, which do not affect the main body of the crane. This proactively prevents trolley rail-biting failures, thereby reducing or avoiding their recurrence.

[0013] The technical solution of the present invention is as follows: A crane trolley anti-rail-biting device includes a support vertical plate A, a support horizontal plate, a support vertical plate B, horizontal guide wheels, a buffer, and support ribs; the support vertical plate A is fixed on the crane end beam; two horizontal guide wheels are fixed at the lower end of the support horizontal plate, and the horizontal guide wheels are on both sides of the track; the buffer is fixed on the support vertical plate B through a buffer flange seat; two support ribs are installed on the back of the buffer flange seat and are connected to the support vertical plate A through the support ribs.

[0014] The support vertical plate A is fixed to the crane end beam by vertical plate bolts.

[0015] The buffer is fixed to the vertical plate B of the bracket by the buffer flange seat, buffer fixing bolts, buffer fixing nuts, buffer bolts, and anti-reverse washers.

[0016] The two support ribs are welded together with a reinforcing cross plate in the middle.

[0017] There are a total of 4 horizontal wheel flange bolts on both sides of the two horizontal guide wheels, which are fastened to the horizontal wheel flanges.

[0018] It also includes a horizontal wheel end cap, which is fixed to the horizontal guide wheel by horizontal wheel bolts.

[0019] The horizontal guide wheel has a horizontal wheel oil injection hole.

[0020] The bottom end of the horizontal guide wheel is the bottom end of the horizontal wheel, and the top end is the top end of the horizontal wheel axle. The diameter of the bottom end of the horizontal wheel is larger than the diameter of the top end of the horizontal wheel axle.

[0021] Rib holes are provided on the upper side of the support rib.

[0022] A method for installing a crane trolley anti-rail-chewing device includes the following steps:

[0023] 1) Check the crane trolley rail for any obstructions. The distance between the obstruction and the horizontal guide wheel of the anti-rail-chewing device should be ≥30mm.

[0024] 2) Confirm whether the crane trolley has rail wear. If so, adjust the inclination of the actual axis of the crane trolley wheels relative to the theoretical axis to ≤0.4% in the horizontal projection plane. Then, adjust the center line of the crane trolley wheels to coincide with the center line of the track span.

[0025] 3) Install anti-derailment devices;

[0026] 4) After installation, measure whether the distance from the top surface of the track to the lower end of the anti-gnawing device is within 5m to 10m;

[0027] 5) After installation, the crane trolley will run back and forth multiple times throughout its full stroke.

[0028] The significant advantages of this invention are:

[0029] (1) In this invention, the dimensions of the vertical plate bolts (5) correspond to those of the end beam bolt holes, and they are directly connected with high-strength bolts. This eliminates the previous step of adding the end beam connecting plate flange and then welding the anti-rail-chewing device, saving time and effort, and making installation convenient and quick.

[0030] (2) The present invention provides a horizontal wheel oil injection hole (20), which facilitates later maintenance.

[0031] (3) In this invention, the support rib plate (13) is provided with rib plate holes (14) to facilitate hoisting and transfer during high-altitude operations.

[0032] (4) In this invention, the spacing between the horizontal guide wheels is set as follows: the width of the track tread ≤ the spacing between the two horizontal guide wheels (4) ≤ the width of the wheel groove of the large wheel, thus avoiding the error of manually adjusting the spacing between the horizontal wheels during the previous installation.

[0033] (5) The diameter of the bottom end (15) of the horizontal wheel of the present invention is larger than the diameter of the upper end (22) of the horizontal wheel shaft, and the rectangular horizontal wheel flange (21) is used to fix it above to prevent the horizontal wheel from falling off from below, thus reducing the safety hazards of the equipment.

[0034] (6) The structure of this invention is simple and reasonable. It can be adapted to different specifications of crane end beams by measuring the dimensions of the end beams, track width and wheel size of different crane models. It has a wide range of applications. Attached Figure Description

[0035] Figure 1 This is a schematic diagram showing the usage status of the anti-rail-chewing device for crane trolleys;

[0036] Figure 2 This is a schematic diagram of the overall structure of the anti-rail-biting device for large vehicles;

[0037] Figure 3 This is the main view;

[0038] Figure 4 yes Figure 3 Top view;

[0039] Figure 5 yes Figure 3 The left view;

[0040] Figure 6 yes Figure 3 A bottom view;

[0041] Figure 7 yes Figure 2 A partial three-dimensional sectional view of the structure;

[0042] Figure 8 This is a schematic diagram of a horizontal guide wheel assembly;

[0043] Figure 9 This is a schematic diagram of the buffer assembly.

[0044] In the diagram: 1: Support vertical plate A; 2: Support horizontal plate; 3: Support vertical plate B; 4: Horizontal guide wheel; 5: Vertical plate bolt; 6: Buffer; 7: Buffer flange base; 8: Buffer fixing bolt; 9: Horizontal wheel end cover; 10: Horizontal wheel bolt; 11: Crane end beam; 12: Rail; 13: Support rib plate; 14: Rib plate hole; 15: Horizontal wheel bottom end; 16: Buffer fixing nut; 17: Buffer bolt; 18: Anti-reverse washer; 19: Horizontal wheel flange bolt; 20: Horizontal wheel oil injection hole; 21: Horizontal wheel flange; 22: Upper end of horizontal wheel axle; 23: Reinforcing horizontal plate. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be noted that the terms "upper / lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "set / sleeved," "sleeved," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0049] A large vehicle anti-rail-biting device includes a support vertical plate A (1), a support horizontal plate (2), a support vertical plate B (3), horizontal guide wheels (4), a buffer (6), and support ribs (13); the support vertical plate A (1) is fixed to the crane end beam (11) by 6 vertical plate bolts (5); the support horizontal plate (2) fixes two horizontal guide wheels (4); the buffer (6) is fixed to the support vertical plate B (3) by a buffer flange seat (7), a buffer fixing bolt (8), a buffer fixing nut (16), a buffer bolt (17), and a backstop washer (18); the two support ribs (13) are welded together by a reinforcing horizontal plate (23).

[0050] The support vertical plate A (1), support horizontal plate (2), support vertical plate B (3), support rib plate (13), and reinforcing horizontal plate (23) are welded together to form a solid whole. Two horizontal guide wheels (4) are fastened to the horizontal wheel flange (21) by four horizontal wheel flange bolts (19) on both sides to prevent the horizontal wheel axle from rotating.

[0051] By using two horizontal guide wheels (4), the sliding friction between the wheel flange and the side of the rail (12) when the crane wheel bites is converted into the rolling friction between the horizontal wheel of the anti-biting device and the rail, so as to avoid the aggravation of the crane wheel biting failure.

[0052] The horizontal guide wheels are located on both sides of the track (12) and have horizontal wheel oil injection holes (20) for easy lubrication and maintenance. The horizontal wheel end cap (9) is fixed with horizontal wheel bolts (10); the diameter of the bottom end (15) of the horizontal wheel is larger than the diameter of the top end (22) of the horizontal wheel shaft to prevent the horizontal wheel from falling off the bottom end.

[0053] Each of the two support ribs (13) has a rib hole (14) on its upper side to facilitate high-altitude hoisting.

[0054] A method for installing a rail-anti-gnawing device for large vehicles includes the following steps:

[0055] 1) Check all the crane trolley rails and the top surface of the support beam for any obstructions. The distance between the obstruction and the horizontal guide wheel (4) of the anti-rail-biting device should be ≥30mm.

[0056] 2) Before installation, confirm whether the crane has severe rail wear. If so, adjust the inclination between the actual and theoretical axles of the wheels in the horizontal projection plane to ≤0.4%. This will reduce the degree of rail wear. Failure to do so will accelerate the wear and replacement frequency of the horizontal wheels of the anti-derailment device. Then, adjust the centerline of the crane's trolley end beam wheels to coincide with the centerline of the track span before installation.

[0057] 3) Remove the original end beam cover plate and then install four anti-derailment devices. During installation, the high-strength bolts of grade 8.8 and above and the anti-reverse nuts must be tightened symmetrically.

[0058] 4) After installation, check the assembly quality again and measure whether the distance from the top surface of the track to the lower end of the anti-rail-chewing device is within 5m to 10m, so that it can play the role of a rail-sweeping plate.

[0059] 5) Check again that the distance between other obstacles and the horizontal guide wheel (4) is ≥30mm.

[0060] 6) After installation, the trolley should be run back and forth three times along its full range and observed in real time for acceptance testing. The operation should be free of any abnormalities.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0062] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rail biting prevention device for a crane trolley, characterized by: The system includes a vertical support plate A (1), a horizontal support plate (2), a vertical support plate B (3), horizontal guide wheels (4), a buffer (6), and support ribs (13). The vertical support plate A (1) is fixed on the crane end beam (11). Two horizontal guide wheels (4) are fixed at the lower end of the horizontal support plate (2), and the horizontal guide wheels (4) are on both sides of the track (12). The buffer (6) is fixed on the vertical support plate B (3) through the buffer flange seat (7). Two support ribs (13) are installed on the back of the buffer flange seat (7) and connected to the vertical support plate A (1) through the support ribs (13).

2. The anti-rail-chewing device for crane trolleys according to claim 1, characterized in that: The support vertical plate A (1) is fixed to the crane end beam (11) by the vertical plate bolts (5).

3. The anti-rail-chewing device for crane trolleys according to claim 1, characterized in that: The buffer (6) is fixed to the vertical plate B (3) of the bracket by the buffer flange seat (7), the buffer fixing bolt (8), the buffer fixing nut (16), the buffer bolt (17), and the anti-reverse washer (18).

4. The anti-rail-chewing device for crane trolleys according to claim 1, characterized in that: The two support ribs (13) are welded together with a reinforcing cross plate (23).

5. A crane trolley anti-rail-chewing device according to claim 1, characterized in that: There are a total of 4 horizontal wheel flange bolts (19) on both sides of the two horizontal guide wheels (4) and fastened to the horizontal wheel flange (21).

6. A crane trolley anti-rail-chewing device according to claim 1, characterized in that: It also includes a horizontal wheel end cap (9), which is fixed to the horizontal guide wheel (4) by a horizontal wheel bolt (10).

7. A crane trolley anti-rail-chewing device according to claim 1, characterized in that: The horizontal guide wheel (4) has a horizontal wheel oil injection hole (20).

8. A crane trolley anti-rail-chewing device according to claim 1, characterized in that: The bottom end of the horizontal guide wheel (4) is the bottom end of the horizontal wheel (15), and the top end is the top end of the horizontal wheel axle (22). The diameter of the bottom end of the horizontal wheel (15) is greater than the diameter of the top end of the horizontal wheel axle (22).

9. A crane trolley anti-rail-chewing device according to claim 1, characterized in that: Rib holes (14) are provided on the upper side of the support rib (13).

10. A method for installing a crane trolley anti-rail-chewing device, characterized in that: Includes the following steps: 1) Check the crane trolley rail for any obstructions. The distance between the obstruction and the horizontal guide wheel (4) of the anti-gnawing device should be ≥30mm. 2) Confirm whether the crane trolley has rail wear. If so, adjust the inclination of the actual axis of the crane trolley wheels relative to the theoretical axis to ≤0.4% in the horizontal projection plane. Then, adjust the center line of the crane trolley wheels to coincide with the center line of the track span. 3) Install anti-derailment devices; 4) After installation, measure whether the distance from the top surface of the track to the lower end of the anti-rail-chewing device is within 5m to 10m; otherwise, reinstall the anti-derailment device.

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