Travelling wheel structure of gantry crane travelling trolley

Abstract

The utility model discloses a travelling wheel structure of a gantry crane travelling trolley, belongs to the technical field of gantry cranes, and solves the problem of short service life of travelling wheels of existing gantry crane travelling trolleys. The automatic walking wheel comprises an automatic walking wheel and a driven walking wheel, the automatic walking wheel and the driven walking wheel each comprise a wheel body, a rotating ring and a limiting ring, the wheel bodies are rotationally installed on a supporting shaft on the inner side of the gantry crane through first bearings, and the sides, close to the gantry crane, of the wheel bodies are provided with installation faces with the diameter smaller than that of the wheel bodies. The rotating ring is arranged on the mounting surface in a sleeving manner, the limiting ring is arranged on the mounting surface on one side of the rotating ring in a sleeving manner, the limiting ring is fixedly connected with the mounting surface, a plurality of balls are movably embedded in one side surface, close to the rotating ring, of the limiting ring, and each ball is in contact with the side surface of the rotating ring. According to the travelling wheel structure of the travelling trolley of the gantry crane, the friction force between the travelling wheel and the trolley track can be reduced, the noise and the travelling resistance are reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gantry cranes, and more specifically, to a traveling wheel structure of a gantry crane traveling trolley. Background Art

[0002] The domestic standards for gantry crane track installation are GB / T3811-2016 "General Rules for Crane Design," GB / T14406-2017 "Nut Cranes," and GB / T3811-2016 "Crane" standards. 1. Determine the track installation location and accurately position and secure it horizontally and vertically in accordance with standard requirements. 2. Ensure that the horizontal distance between each track and the installation height meet standard requirements. 3. Strictly control the straightness, flatness, and lateral inclination of the track, and adjust and calibrate the track according to standard requirements. 4. All processes during track installation must be carried out in accordance with standard requirements to ensure that the process quality meets standard requirements. The track gauge deviation must not exceed ±5mm; the track bending straightness must not exceed 2mm; and the relative elevation difference between two parallel tracks must not exceed 10mm.

[0003] The existing gantry crane trolley wheel structure, such as Figure 1 As shown, it generally includes an automatic running wheel 1 and a passive running wheel 2. Both the automatic running wheel 1 and the passive running wheel 2 are rotatably installed on the gantry crane 3. The automatic running wheel 1 is a wheel structure with gears, which is driven by a motor to move, and the passive running wheel 2 plays the role of supporting the movement. In actual application, due to the serious deflection of the main beam structure of the gantry crane 3, the trolley track 4 on the two main beams is deformed, and the straightness, elevation, and gauge errors are large. In addition, due to the fatigue and aging of various components of the gantry crane due to long-term operation for many years, the automatic running wheel 1 and the passive running wheel 2 have serious friction with the track side when walking on the trolley track 4, the walking noise is loud, and the walking resistance is large. In the most serious case, the running wheel derails when lifting heavy objects, or the running wheel derails immediately when the hook is slightly tilted. The running wheel derails frequently and requires the cooperation of other cranes, riggers, and fitters to repair (lift the trolley to the correct track position). Frequent derailments greatly affect the normal use of the gantry crane.

[0004] Therefore, it is urgent to develop and design a new type of gantry crane trolley wheel structure to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. The purpose of the present invention is to provide a gantry crane trolley wheel structure that can reduce the friction between the wheel and the trolley track, reduce noise and running resistance, and extend service life.

[0006] In order to achieve the above-mentioned object, the utility model provides a gantry crane trolley wheel structure, comprising an automatic wheel and a passive wheel, the automatic wheel and the passive wheel both comprising a wheel body, a rotating ring and a limiting ring, the wheel body being rotatably mounted on the support shaft inside the gantry crane through a first bearing, the wheel body being close to the gantry crane is provided with a mounting surface with a diameter smaller than the wheel body diameter, the rotating ring being sleeved on the mounting surface, and a second bearing being provided between the rotating ring and the mounting surface, the rotating ring is in contact with the side surface of the trolley track, the limiting ring being sleeved on the mounting surface on one side of the rotating ring, and the limiting ring is fixedly connected to the mounting surface, a plurality of balls being movably embedded in a side surface of the limiting ring close to the rotating ring, the plurality of balls being evenly distributed along the circumferential direction of the rotating ring, and each of the balls being in contact with the side surface of the rotating ring, a gear ring being fixedly provided on the outer wall surface of the limiting ring corresponding to the automatic wheel, and a wheel rim being in contact with the wheel body diameter larger than the wheel body diameter on the other side of the wheel body corresponding to the passive wheel.

[0007] As a further improvement, the radial position of the balls corresponds to the contact surface position of the rotating ring and the trolley track.

[0008] Furthermore, the limiting ring and the wheel body are fastened together by bolts, and the gear ring and the limiting ring are fastened together by bolts.

[0009] Furthermore, there is a clearance fit between the rotating ring and the limiting ring, and the clearance between the rotating ring and the limiting ring is 4-8 mm.

[0010] Furthermore, a brush is provided on a side of the limiting ring close to the rotating ring, and the brush is in contact with the side surface of the rotating ring.

[0011] Furthermore, the brush is adhered to the side surface of the limiting ring by glue.

[0012] Beneficial effects

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The utility model discloses a gantry crane trolley wheel structure, in which the automatic wheels and the passive wheels adopt relatively sliding rotating rings to contact the side of the trolley track. During the walking process, the surface contact friction between the wheels and the side of the trolley track is converted into point rolling friction of ball contact, which can reduce the friction between the wheels and the trolley track, reduce noise and walking resistance, and extend service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the prior art;

[0016] Figure 2 It is a structural diagram of the utility model;

[0017] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A;

[0018] Figure 4 It is an enlarged schematic diagram of the structure of the wheel body in the utility model.

[0019] Among them: 1-automatic running wheel, 2-passive running wheel, 3-gantry crane, 4-trolley track, 5-wheel body, 6-rotating ring, 7-limiting ring, 8-support shaft, 9-mounting surface, 10-second bearing, 11-ball, 12-gear ring, 13-wheel rim, 14-brush. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0021] See Figure 2-4 The utility model provides a gantry crane trolley wheel structure, including an automatic walking wheel 1 and a passive walking wheel 2, wherein the automatic walking wheel 1 and the passive walking wheel 2 both include a wheel body 5, a rotating ring 6 and a limiting ring 7. The wheel body 5 is rotatably mounted on the support shaft 8 inside the gantry crane 3 through a first bearing. A mounting surface 9 with a diameter smaller than that of the wheel body 5 is provided on the side of the wheel body 5 close to the gantry crane 3. The rotating ring 6 is sleeved on the mounting surface 9, and a second bearing 10 is provided between the rotating ring 6 and the mounting surface 9, so that the rotating ring 6 can rotate relative to the wheel body 5. The rotating ring 6 contacts the side of the trolley track 4 to play a limiting role. The limiting ring 7 is sleeved on the mounting surface 9 on one side of the rotating ring 6, and the limiting ring 7 and the mounting surface 9 are fixedly connected, and a plurality of balls 11 are movably embedded on one side of the limiting ring 7 close to the rotating ring 6. The plurality of balls 11 are evenly distributed along the circumferential direction of the rotating ring 6, and each ball 11 is in contact with the side of the rotating ring 6, thereby further supporting the rotating ring 6 and avoiding deformation of the second bearing 10 and the rotating ring 6. Specifically, two-thirds of the volume of the ball 11 is embedded in the limiting ring 7 to avoid the problem of the ball 11 falling off. A gear ring 12 is fixedly provided on the outer wall surface of the limiting ring 7 corresponding to the automatic walking wheel 1 to facilitate driving the automatic walking wheel 1 to move, and a wheel rim 13 with a diameter larger than the diameter of the wheel body 5 is provided on the other side of the wheel body 5 corresponding to the passive walking wheel 2 to further prevent the problem of the walking wheel derailing and falling off.

[0022] The utility model discloses a gantry crane trolley wheel structure, in which the automatic wheel 1 and the passive wheel 2 adopt a relatively sliding rotating ring 6 to contact the side of the trolley track 4. During the walking process, the surface contact friction between the wheel and the side of the trolley track is converted into point rolling friction of ball contact, which can reduce the friction between the wheel and the trolley track, reduce noise and walking resistance, and extend service life.

[0023] Preferably, the radial position of the ball 11 corresponds to the contact surface position of the rotating ring 6 and the trolley track 4, so that the force point of the rotating ring 6 corresponds to the position of the ball 11, further improving the supporting effect of the rotating ring 6.

[0024] Preferably, the limiting ring 7 and the wheel body 5 are fastened together by bolts, and the gear ring 12 and the limiting ring 7 are fastened together by bolts. Specifically, a connecting plate is provided on one side of the limiting ring 7, and the connecting plate and the wheel body 5 are fastened together by multiple axially arranged bolts. Similarly, a connecting plate is also provided on one side of the gear ring 12, and the connecting plate and the limiting ring 7 are fastened together by multiple axially arranged bolts.

[0025] Preferably, there is a clearance fit between the rotating ring 6 and the limiting ring 7 to ensure that the rotating ring 6 can rotate and the ball 11 can support the rotating ring 6. At the same time, it is convenient to add lubricating oil to the position of the ball 11 and the second bearing 10, and the gap between the rotating ring 6 and the limiting ring 7 is 4-8mm, which is convenient for the installation of the brush 14.

[0026] Preferably, a brush 14 is provided on the side of the limiting ring 7 close to the rotating ring 6. The brush 14 contacts the side of the rotating ring 6, ensuring that the rotating ring 6 can rotate while also covering the gap between the rotating ring 6 and the limiting ring 7 to prevent impurities from entering. When adding lubricating oil, the oil nozzle can be passed through the brush 14. Furthermore, the brush 14 is glued to the side of the limiting ring 7. Specifically, the brush 14 is installed on a mounting ring, which is glued to the limiting ring 7 by glue, which facilitates the installation of the brush 14 and also facilitates disassembly and maintenance.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A gantry crane trolley wheel structure, comprising an automatic wheel (1) and a passive wheel (2), characterized in that: The automatic running wheel (1) and the passive running wheel (2) both include a wheel body (5), a rotating ring (6) and a limiting ring (7). The wheel body (5) is rotatably mounted on a support shaft (8) on the inner side of the gantry crane (3) through a first bearing. A mounting surface (9) having a diameter smaller than that of the wheel body (5) is provided on the side of the wheel body (5) close to the gantry crane (3). The rotating ring (6) is sleeved on the mounting surface (9), and a second bearing (10) is provided between the rotating ring (6) and the mounting surface (9). The rotating ring (6) contacts the side of the trolley track (4). The limiting ring (7) is sleeved on the side of the trolley track (4). On the mounting surface (9) on one side of the rotating ring (6), the limiting ring (7) is fixedly connected to the mounting surface (9), and a plurality of balls (11) are movably embedded on a side of the limiting ring (7) close to the rotating ring (6), and the plurality of balls (11) are evenly distributed along the circumferential direction of the rotating ring (6), and each of the balls (11) is in contact with the side of the rotating ring (6). A gear ring (12) is fixedly provided on the outer wall surface of the limiting ring (7) corresponding to the automatic running wheel (1), and a wheel rim (13) having a diameter larger than that of the wheel body (5) is provided on the other side of the wheel body (5) corresponding to the passive running wheel (2).

2. The gantry crane trolley wheel structure according to claim 1 is characterized in that: The radial position of the ball (11) corresponds to the contact surface position of the rotating ring (6) and the trolley track (4).

3. The gantry crane trolley wheel structure according to claim 1 is characterized in that: The limiting ring (7) and the wheel body (5) are fastened together by bolts, and the gear ring (12) and the limiting ring (7) are fastened together by bolts.

4. A gantry crane trolley wheel structure according to any one of claims 1 to 3, characterized in that: The rotating ring (6) and the limiting ring (7) are clearance-fitted, and the clearance between the rotating ring (6) and the limiting ring (7) is 4-8 mm.

5. The gantry crane trolley wheel structure according to claim 4 is characterized in that: A brush (14) is provided on one side of the limiting ring (7) close to the rotating ring (6), and the brush (14) is in contact with the side surface of the rotating ring (6).

6. The gantry crane trolley wheel structure according to claim 5, characterized in that: The brush (14) is adhered to the side surface of the limiting ring (7) by glue.

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