Wheel axle structure for four-way shuttle vehicle

Abstract

The axle structure for the four-way shuttle vehicle comprises a transmission shaft and a walking wheel, a middle shaft body of the transmission shaft is installed on a wheel carrier plate through a bearing assembly, a shaft body on one side of the transmission shaft is a power part, and a shaft body on the other side of the transmission shaft is connected with a hub hole of the walking wheel through an expansion connecting sleeve. The bearing assembly comprises a bearing sleeve and angular contact ball bearings, the bearing sleeve is installed on the wheel carrier plate, the two angular contact ball bearings with the wide face facing the wide face or the narrow face facing the narrow face are installed between the transmission shaft and the bearing sleeve, and a spacer bush is arranged between the two angular contact ball bearings. Limiting check rings are coaxially installed at the side ends, facing the wheel carrier plates, of the walking wheels, and a power part of the transmission shaft is in key connection with a driving chain wheel. According to the utility model, an original deep groove ball bearing is replaced by the angular contact ball bearings, so that the distance between the two angular contact ball bearings is increased, and the bearing capacity of the bearing assembly is improved; original key connection is replaced with expansion connection sleeve connection, and the problem that key connection is difficult to disassemble and reset is solved.

Description

Technical Field

[0001] The utility model relates to a rolling mechanism, in particular to a wheel axle structure for a four-way shuttle vehicle. Background Art

[0002] When the four-way shuttle is moving on the track, the torque generated by the interaction between the limit ring and the track causes the deep groove ball bearing installed inside the traveling wheel to be subjected to a large axial load, resulting in a high damage rate of the deep groove ball bearing.

[0003] In addition, the travel wheel and the axle are connected by a key to transmit power, which requires that the travel wheel and the axle must fit tightly, otherwise the travel wheel may fall off. However, an overly tight fit will cause the travel wheel to be difficult to disassemble during maintenance and difficult to reset after disassembly. Utility Model Content

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to propose a wheel axle structure for a four-way shuttle vehicle which is easy to disassemble and can withstand a large axial load.

[0005] The wheel axle structure for a four-way shuttle vehicle that can solve the above technical problems includes a transmission shaft and a running wheel, and the difference is that:

[0006] 1. The middle shaft of the transmission shaft is installed on the wheel frame plate through a bearing assembly. The shaft on one side of the transmission shaft is the power part, and the shaft on the other side of the transmission shaft is connected to the hub hole of the travel wheel through an expansion sleeve.

[0007] 2. The bearing assembly includes a bearing sleeve and an angular contact ball bearing. The bearing sleeve is installed on the wheel frame plate. Two angular contact ball bearings with wide faces facing wide faces or narrow faces facing narrow faces are installed between the transmission shaft and the bearing sleeve. A spacer sleeve is provided between the two angular contact ball bearings.

[0008] 3. A limit retaining ring is coaxially installed on the side end of the traveling wheel facing the wheel frame plate.

[0009] Furthermore, a driving sprocket is key-connectedly mounted on the power part of the transmission shaft.

[0010] Beneficial effects of the utility model:

[0011] 1. The wheel axle structure for the four-way shuttle vehicle of the utility model is improved on the basis of the original structure, the deep groove ball bearing is replaced with an angular contact ball bearing, and the distance between the two angular contact ball bearings is increased, thereby improving the load-bearing capacity of the bearing assembly.

[0012] 2. In the structure of the utility model, the key connection of the original structure is no longer used to connect the travel wheel. Instead, the original key connection is replaced with an expansion sleeve connection. The expansion sleeve is used to adjust the matching clearance between the transmission shaft and the travel wheel to achieve a tight fit, which solves the difficulty of disassembly and reset of the traditional key connection.

[0013] 3. In the structure of the utility model, the expansion sleeve itself is provided with a disassembly screw, and the travel wheel can be easily disassembled by simply twisting the disassembly screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an implementation method of the utility model.

[0015] Figure 2 for Figure 1 Axonometric view of the expansion sleeve in an embodiment.

[0016] Figure number identification: 1. Drive shaft; 2. Travel wheel; 3. Wheel frame plate; 4. Expansion sleeve; 4-1. Fastening screw; 4-2. Outer sleeve; 4-3. End plate; 4-4. Inner sleeve; 5. Bearing sleeve; 6. Angular contact ball bearing; 7. Spacer; 8. Limiting ring; 9. Driving sprocket; 10. Track. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described below in conjunction with the implementation modes shown in the accompanying drawings.

[0018] The utility model discloses a wheel axle structure for a four-way shuttle vehicle, comprising a transmission shaft 1, a running wheel 2 and a wheel frame plate 3.

[0019] The wheel frame plate 3 is vertically arranged downward on the left side of the frame (not shown in the figure), and a coaxial bearing sleeve 5 is fixed in the mounting hole at the lower end of the wheel frame plate 3. Figure 1 shown.

[0020] The transmission shaft 1 coaxially crosses the sleeve hole of the bearing sleeve 5 in the left and right directions. Two angular wide-surface contact ball bearings 6 are installed between the middle shaft body of the transmission shaft 1 and the sleeve hole of the bearing sleeve 5. A spacer sleeve 7 is coaxially sleeved on the shaft body between the two angular contact ball bearings 6. The function of the spacer sleeve 7 is to increase the interval between the two angular contact ball bearings 6 and improve the load-bearing capacity. Figure 1 shown.

[0021] The left side of the transmission shaft 1 is coaxially keyed with a drive sprocket 9. Figure 1 shown.

[0022] The hub hole of the travel wheel 2 is coaxially sleeved on the right side shaft body of the transmission shaft 1, and the hub hole of the travel wheel 2 and the shaft body of the transmission shaft 1 are connected by a tightening sleeve 4 installed from the right side. A limit retaining ring 8 is coaxially installed on the left end face of the travel wheel 2; the travel wheel 2 is rollingly installed on the track 10, and the inclined surface of the limit retaining ring 8 is limited on the upper left corner of the wheel track 10, such as Figure 1 shown.

[0023] The expansion connection sleeve 4 includes an outer sleeve 4-2 and an inner sleeve 4-4 which are fitted together through a conical structure. An end plate 4-3 connected to the inner sleeve 4-4 is provided on the right side of the outer sleeve 4-2. The end plate 4-3 is connected to the outer sleeve 4-2 through tightening screws 4-1 evenly distributed around the circumference. The outer sleeve 4-2 is moved closer to the end plate 4-3 by tightening the tightening screws 4-1, that is, the tightening screws 4-1 pull the outer sleeve 4-2 to tighten on the inner sleeve 4-4, the inner sleeve 4-4 contracts to clamp the transmission shaft 1, and the outer sleeve 4-2 expands and tightens between the inner sleeve 4-4 and the hub hole of the walking wheel 2, thereby realizing a seamless connection between the transmission shaft 1 and the walking wheel 2. The gap between the walking wheel 2 and the transmission shaft 1 in the seamless connection state becomes smaller or even interferes, thereby realizing a stable and reliable connection. Figure 1 , Figure 2 shown.

[0024] When removing the traveling wheel 2, it is only necessary to unscrew the fastening screws 4-1 and then screw them in from the disassembly screw holes evenly distributed around the circumference of the end plate 4-3. The fastening screws 4-1 press against the end surface of the outer sleeve 4-2 to separate the outer sleeve 4-2 from the inner sleeve 4-4. At this time, the outer sleeve 4-2 contracts and the inner sleeve 4-4 expands, thereby increasing the gap between the traveling wheel 2 and the transmission shaft 1, so that the traveling wheel 2 can be easily removed.

[0025] like Figure 1 As shown, during the walking process of the traveling wheel 2, the limit ring 8 interacts with the track 10 to apply an axial force to the transmission shaft 1. In the original wheel axle structure, the axial bearing capacity of the deep groove ball bearings is small and they are in contact with each other. The deep groove ball bearings are not ideal for resisting the overturning moment from the contact point between the track 10 and the traveling wheel 2, resulting in a high damage rate of the deep groove ball bearings. The improved wheel axle structure replaces the deep groove ball bearings with two angular contact ball bearings 6 with a spacer 7 in the middle, and the two angular contact ball bearings 6 are installed in a wide-face-to-wide-face manner, which can effectively offset the axial loads in two directions. The role of the spacer 7 is to increase the distance between the two angular contact ball bearings 6 so that the two angular contact ball bearings 6 are subjected to force as a whole, so that the wheel axle structure has a certain force arm to offset the overturning moment generated by the contact between the traveling wheel 2 and the track 10.

Claims

1. A wheel axle structure for a four-way shuttle vehicle, comprising a transmission shaft (1) and a running wheel (2), characterized in that: The middle shaft body of the transmission shaft (1) is installed on the wheel frame plate (3) through a bearing assembly, the shaft body on one side of the transmission shaft (1) is the power part, and the shaft body on the other side of the transmission shaft (1) is connected to the hub hole of the running wheel (2) through an expansion sleeve (4); The bearing assembly comprises a bearing sleeve (5) and an angular contact ball bearing (6), wherein the bearing sleeve (5) is mounted on the wheel frame plate (3), two angular contact ball bearings (6) with wide faces facing wide faces or narrow faces facing narrow faces are mounted between the transmission shaft (1) and the bearing sleeve (5), and a spacer sleeve (7) is provided between the two angular contact ball bearings (6); A limit stop ring (8) is coaxially mounted on the side end of the traveling wheel (2) facing the wheel frame plate (3).

2. The wheel axle structure for a four-way shuttle vehicle according to claim 1, characterized in that: The power part of the transmission shaft (1) is key-connected and mounted with a driving sprocket (9).

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