A heavy-duty emergency runway escape device load bearing steerable wheel structure

Abstract

The utility model provides a kind of load bearing steering wheel structure of heavy emergency runway escape device, a kind of load bearing steering wheel structure of heavy emergency runway escape device, including walking chassis, the head middle position of walking chassis is fixedly installed with sleeve, the bottom of sleeve is rotatably sleeved in the outside of rotating shaft by conical roller bearing, the upper portion of rotating shaft is formed into rotating support cooperation between deep groove ball bearing and sleeve, deep groove ball bearing is fixed on rotating shaft by bearing limiting structure, the top of sleeve is fixed with pressing plate, the bottom end of rotating shaft is fixedly connected with wheel carrier, the both sides of wheel carrier are rotatably installed with steering wheel, the outer end surface of wheel carrier is hinged with traction rod. This load bearing steering wheel structure can be used for the heavy load support and steering of walking chassis, can bear big axial force and radial force, ensure the long-term reliable operation of steering wheel, prolong its service life.

Description

Technical Field

[0001] This utility model relates to the field of aviation equipment manufacturing, and in particular to a load-bearing steering wheel structure for a heavy-duty emergency runway evacuation device. Background Technology

[0002] Emergency runway evacuation devices are primarily used in emergency situations to replace wheels with blown tires or locked wheels, assisting aircraft in quickly removing them from the runway. Heavy-duty emergency runway evacuation devices typically include a running chassis with auxiliary wheels and tilting casters at the rear. To enable steering, steering wheels are installed at the front of the running chassis. Currently, the commonly used steering wheels are primarily swivel casters driven by linkage mechanisms. Because this running chassis mainly bears the weight of heavy aircraft, it experiences significant vertical axial forces during use, as well as a certain amount of towing radial forces. Traditional swivel casters are prone to damage under heavy axial and radial forces, resulting in short service life and unreliable performance. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a load-bearing steering wheel structure for a heavy-duty emergency runway detachment device. This load-bearing steering wheel structure can be used for heavy-duty support and steering of the chassis, and can withstand large axial and radial forces, ensuring the long-term reliable operation of the steering wheel and extending its service life.

[0004] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: A load-bearing steering wheel structure for a heavy-duty emergency runway detachment device includes a chassis. A sleeve is fixedly installed at the middle of the head of the chassis. The bottom of the sleeve is rotatably mounted on the outside of a rotating shaft via a tapered roller bearing. The upper part of the rotating shaft is rotatably supported by the sleeve via a deep groove ball bearing. The deep groove ball bearing is fixed on the rotating shaft via a bearing limiting structure. A pressure plate is fixed to the top of the sleeve. The bottom end of the rotating shaft is fixedly connected to a wheel frame. Steering wheels are rotatably installed on both sides of the wheel frame. A traction rod is hinged to the outer end face of the wheel frame.

[0005] Preferably, the rear bottom of the walking chassis is equipped with auxiliary wheels and tilting wheels.

[0006] Preferably, the bearing limiting structure includes a washer, a wing retainer, and a round nut that are sequentially mounted on the sleeve.

[0007] Preferably, the pressure plate is machined with multiple sets of bolt holes, and the locations of the bolt holes are fixedly connected to the chassis by bolts.

[0008] Preferably, the steering wheels are made of nylon and are arranged in a double-row symmetrical configuration.

[0009] Preferably, the wheel frame is fixed with symmetrically arranged traction lugs, which are hinged to the U-shaped seat at the end of the traction rod via pins.

[0010] Preferably, the steering wheel is mounted on the wheel axle of the wheel frame by a limiting nut.

[0011] The present invention has the following beneficial effects: 1. The load-bearing steering wheel structure of this utility model can be used for heavy-duty support and steering of the chassis. It can withstand large axial and radial forces, ensuring the long-term reliable operation of the steering wheel and extending its service life.

[0012] 2. This utility model uses a combination of deep groove ball bearings and tapered roller bearings for rotational support, thereby ensuring that the sleeve can simultaneously withstand axial and radial forces to meet the requirements of heavy-load support and steering.

[0013] 3. The use of the above-mentioned auxiliary wheels facilitates reliable movement of the chassis without dragging during operation. The flip wheels facilitate lifting the chassis during practical use, thereby lifting the machine wheels and auxiliary wheels off the ground.

[0014] 4. The bearing limiting structure enables reliable limiting installation of deep groove ball bearings.

[0015] 5. The bolt connection described above facilitates the reliable fixing of the pressure plate to the chassis.

[0016] 6. The hinged connection between the towing lug and the U-shaped seat facilitates the hinged connection between the towing rod and the wheel frame, thereby facilitating the towing of the entire chassis via the towing rod. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a first-person 3D view of the overall structure of the heavy-duty emergency runway detachment device of this utility model.

[0019] Figure 2 This is a second-view 3D diagram of the overall structure of the heavy-duty emergency runway detachment device of this utility model.

[0020] Figure 3 This is a first-person 3D view of the load-bearing steering wheel structure of this practical application.

[0021] Figure 4 This is a second-view 3D diagram of the load-bearing steering wheel structure of this practical application.

[0022] Figure 5 This is the main view of the load-bearing steering wheel structure of this utility model.

[0023] Figure 6For practical purposes Figure 5 A view of the centrally loaded steering wheel structure (AA view).

[0024] Figure 7 This is a side view of the load-bearing steering wheel structure of this utility model.

[0025] Figure 8 For practical purposes Figure 7 BB view of the load-bearing steering wheel structure.

[0026] In the diagram: 1. Walking chassis; 2. Auxiliary wheel; 3. Tilting wheel; 4. Steering wheel; 5. Wheel frame; 6. U-shaped seat; 7. Rotating shaft; 8. Sleeve; 9. Pressure plate; 10. Traction rod; 11. Traction lug; 12. Bolt hole; 13. Round nut; 14. Butterfly clasp; 15. Washer; 16. Deep groove ball bearing; 17. Tapered roller bearing; 18. Limit nut; 19. Wheel axle. Detailed Implementation

[0027] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0028] See Figure 1-8 A heavy-duty emergency runway evacuation device's load-bearing steering wheel structure includes a chassis 1. A sleeve 8 is fixedly installed at the center of the head of the chassis 1. The bottom of the sleeve 8 is rotatably mounted on the outside of a rotating shaft 7 via a tapered roller bearing 17. The upper part of the rotating shaft 7 is rotatably supported by the sleeve 8 via a deep groove ball bearing 16. The deep groove ball bearing 16 is fixed to the rotating shaft 7 by a bearing limiting structure. A pressure plate 9 is fixed to the top of the sleeve 8. The bottom end of the rotating shaft 7 is fixedly connected to a wheel frame 5. Steering wheels 4 are rotatably mounted on both sides of the wheel frame 5. A traction rod 10 is hinged to the outer end face of the wheel frame 5. This load-bearing steering wheel structure can be used for heavy-duty support and steering of the chassis, and can withstand large axial and radial forces, ensuring long-term reliable operation of the steering wheels and extending their service life. By using deep groove ball bearings 16 and tapered roller bearings 17 for rotatable support between the sleeve 8 and the rotating shaft 7, it is ensured that the sleeve 8 can simultaneously withstand axial and radial forces to meet the requirements of heavy-duty support and steering.

[0029] Furthermore, the rear end of the walking chassis 1 is equipped with auxiliary wheels 2 and tilting wheels 3. The auxiliary wheels 2 facilitate reliable movement of the walking chassis 1 without dragging during operation, while the tilting wheels 3 facilitate lifting the walking chassis 1 during practical use, thereby lifting the machine wheels and auxiliary wheels 2 off the ground.

[0030] Furthermore, the bearing limiting structure includes a washer 15, a butterfly retaining ring 14, and a round nut 13 sequentially mounted on the sleeve 8. The bearing limiting structure enables reliable positioning and installation of the deep groove ball bearing 16.

[0031] Furthermore, the pressure plate 9 is machined with multiple sets of bolt holes 12, and the locations of the bolt holes 12 are fixedly connected to the chassis 1 by bolts. This bolt connection facilitates a reliable and secure connection between the pressure plate 9 and the chassis 1.

[0032] Furthermore, the steering wheels 4 are made of nylon and arranged in a double-row symmetrical configuration. This arrangement enhances their load-bearing capacity.

[0033] Furthermore, symmetrically arranged traction lugs 11 are fixed on the wheel frame 5, and the traction lugs 11 are hinged to the U-shaped seat 6 at the end of the traction rod 10 via pins. The hinged connection between the traction lugs 11 and the U-shaped seat 6 facilitates the hinged connection between the traction rod 10 and the wheel frame 5, thereby facilitating the towing of the entire chassis 1 via the traction rod 10.

[0034] Furthermore, the steering wheel 4 is mounted on the axle 19 of the wheel frame 5 via a limiting nut 18. The limiting nut 18 enables the steering wheel 4 to be limited.

[0035] Furthermore, to ensure that the steering wheel can bear sufficient load while minimizing its weight, the steering wheel is made of Guanhong MNW150 / 35 black cast nylon wheel, which can bear a single load of up to 5000kg and has the advantages of high wear resistance, strong load capacity, low rolling resistance and light weight.

[0036] Furthermore, the wheel frame and rotating shaft are made of high-strength alloy steel and undergo rigorous heat treatment to minimize the weight of the steering wheels while ensuring strength. The tapered roller bearings and deep groove ball bearings used in the steering wheels can effectively reduce the steering force and reduce the workload of maintenance personnel.

[0037] The auxiliary wheels mounted on the chassis are mainly used to replace the lifting wheel assembly of the jacking mechanism in maintaining the traction and movement function of the emergency runway towing device after it has been adjusted to transport mode. Before using the emergency runway towing device, the jacking mechanism should be adjusted so that the auxiliary wheels are off the ground. The auxiliary wheels consist of a wheel frame and nylon wheels. The working process and principle of this utility model: In practical use, the towing rod is connected to the tractor, and then the towing rod drives the wheel frame 5. The wheel frame 5 will synchronously drive the steering wheel 4 to move. At the same time, when turning is required, the towing rod 10 synchronously drives the wheel frame 5 to rotate. At this time, the wheel frame 5 will synchronously drive the rotating shaft 7 to rotate. Since the rotating shaft 7 and the sleeve 8 are supported by a deep groove ball bearing 16 and a tapered roller bearing 17, it is ensured that the sleeve 8 can synchronously bear axial force and radial force.

Claims

1. A load-bearing steering wheel structure for a heavy-duty emergency runway evacuation device, characterized in that, The system includes a chassis (1), a sleeve (8) is fixedly installed at the middle of the head of the chassis (1), the bottom of the sleeve (8) is rotatably mounted on the outside of the rotating shaft (7) by a tapered roller bearing (17), the upper part of the rotating shaft (7) is connected to the sleeve (8) by a deep groove ball bearing (16), the deep groove ball bearing (16) is fixed on the rotating shaft (7) by a bearing limiting structure, a pressure plate (9) is fixed on the top of the sleeve (8), the bottom end of the rotating shaft (7) is fixedly connected to the wheel frame (5), steering wheels (4) are rotatably installed on both sides of the wheel frame (5), and a traction rod (10) is hinged to the outer end face of the wheel frame (5).

2. The load-bearing steering wheel structure of the heavy-duty emergency runway evacuation device according to claim 1, characterized in that: The rear bottom of the walking chassis (1) is equipped with auxiliary wheels (2) and tilting wheels (3).

3. The load-bearing steering wheel structure of the heavy-duty emergency runway evacuation device according to claim 1, characterized in that: The bearing limiting structure includes a gasket (15), a butterfly retaining ring (14), and a round nut (13) installed sequentially on the sleeve (8).

4. The load-bearing steering wheel structure of a heavy-duty emergency runway evacuation device according to claim 1, characterized in that: The pressure plate (9) has multiple sets of bolt holes (12), and the bolt holes (12) are fixedly connected to the walking chassis (1) by bolts.

5. The load-bearing steering wheel structure of a heavy-duty emergency runway evacuation device according to claim 1, characterized in that: The steering wheel (4) is made of nylon and is arranged in a double row symmetrical arrangement.

6. The load-bearing steering wheel structure of a heavy-duty emergency runway evacuation device according to claim 1, characterized in that: Symmetrically arranged traction lugs (11) are fixed on the wheel frame (5). The traction lugs (11) are hinged to the U-shaped seat (6) at the end of the traction rod (10) via a pin.

7. The load-bearing steering wheel structure of a heavy-duty emergency runway evacuation device according to claim 5, characterized in that: The steering wheel (4) is mounted on the axle (19) of the wheel frame (5) by a limiting nut (18).

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