Outdoor AGV tractor steering axle structure

Abstract

The utility model discloses an outdoor AGV tractor steering axle structure which comprises an axle body, two hubs, two steering knuckles, an oil cylinder assembly, two brake discs and two brake calipers, the oil cylinder assembly and the steering knuckles on the left side and the right side are in rotating connection, the steering knuckles are matched with the axle body through tapered roller bearings, and the two hubs are arranged on the axle body. The steering knuckle and the connecting shaft are matched and fixed through a screw, the steering angle sensor is detachably installed on the upper surface of the axle body, and a rotor of the angle sensor and the upper end of the connecting shaft form synchronous movement through a transmission assembly. Due to the fact that the connecting shaft and the steering knuckle are fixed through the screw, the steering angle sensor is detachably installed on the upper surface of the axle body, and the rotor of the angle sensor and the upper end of the connecting shaft form synchronous movement through the transmission assembly, the design reduces the structural change of the whole axle, guarantees the overall structure of the axle, optimizes the assembling mode, improves the assembling efficiency and reduces the manufacturing cost. And the whole structure is more compact, and the occupied space is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steering axles, in particular to a steering axle structure of an outdoor AGV tractor. Background Art

[0002] Tractors are the most commonly used vehicles in the aviation ground handling field. They are widely used in various places such as airports, national defense, railways, postal services, manufacturing, medicine, logistics, etc. They are ideal traction vehicles for cargo transportation. The application of green, low-carbon and energy-saving ground handling vehicles and AGV tractors is also gaining more and more attention from countries around the world. As one of the most important components of electric AGV tractors, the upgrading of tractor steering mechanisms has become imminent.

[0003] The steering axle of the tractor is responsible for steering during the movement. It uses the steering knuckle in the axle to deflect the wheels at both ends to a certain angle to achieve the steering of the tractor. In addition to bearing the vertical load of the tractor, it also bears the longitudinal force and lateral force and the torque caused by these forces.

[0004] The existing AGV steering axle structure adopts an integrated configuration of the kingpin and the steering angle sensor. The steering angle sensor is arranged at the upper end of the kingpin. If the existing technology is used to directly lengthen the steering knuckle and assemble it with the steering angle sensor, the overall structure of the tractor steering axle will be relatively loose and occupy a large volume. Therefore, we need an outdoor AGV tractor steering axle structure to make the tractor steering axle structure more compact and reduce its occupied volume. Utility Model Content

[0005] The utility model aims to provide a steering bridge structure of an outdoor AGV tractor to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steering axle structure of an outdoor AGV tractor, comprising a bridge body, two wheel hubs, two steering knuckles, a cylinder assembly, two brake discs and two brake calipers, wherein the cylinder assembly and the steering knuckles on the left and right sides are rotationally connected, the steering knuckle and the bridge body are matched through tapered roller bearings, the steering knuckle and the connecting shaft are matched through screws, the steering angle sensor is detachably mounted on the upper surface of the bridge body, and the rotor of the angle sensor and the upper end of the connecting shaft constitute synchronous motion through a transmission assembly, thereby being used to detect the rotation angle and steering direction of the connecting shaft.

[0007] Preferably, the transmission assembly includes two pulleys and a transmission belt, the two pulleys are fixedly connected to the outer surfaces of the rotor and the connecting shaft respectively, and the transmission belt is sleeved on the outer surfaces of the pulleys.

[0008] Preferably, the oil cylinder assembly further comprises an arc-shaped connecting rod, the surfaces of both ends of the arc-shaped connecting rod are provided with pin holes, connecting rod pins are arranged in the pin holes, and the oil cylinder assembly and the steering knuckle are rotationally connected with both ends of the arc-shaped connecting rod through the connecting rod pin.

[0009] Preferably, a gasket is provided on the surface of the arc-shaped connecting rod, the gasket is fixedly connected to the arc-shaped connecting rod by bolts, and the connecting rod pin passes through the gasket.

[0010] Preferably, a first oil seal is provided between the bridge body and the steering knuckle, a second oil seal is provided between the bridge body and the connecting shaft, and lubricating oil is stored between the first oil seal and the second oil seal.

[0011] Preferably, the wheel hub is arranged on the outside of the steering knuckle, the brake disc is arranged on the inside of the steering knuckle, and the brake caliper is arranged on the outside of the brake disc.

[0012] Preferably, the bridge body comprises an upper bridge, a lower bridge, an I-shaped bridge and a cross bridge, the I-shaped bridge is fixedly connected between the upper bridge and the lower bridge, and the cross bridge is fixedly connected between the I-shaped bridge and the lower bridge.

[0013] Beneficial Effects

[0014] The utility model provides a steering bridge structure for an outdoor AGV tractor, which has the following beneficial effects:

[0015] 1. The steering axle structure of the outdoor AGV tractor is fixed with screws on the connecting shaft and the steering knuckle. The steering angle sensor can be detachably mounted on the upper surface of the bridge body, and the rotor of the steering angle sensor and the upper end of the connecting shaft move synchronously through the transmission assembly. This design not only reduces the structural changes of the entire bridge and ensures the overall structure of the bridge, but also optimizes the assembly method, improves assembly efficiency, and makes the entire structure more compact, reducing the occupied space.

[0016] 2. The steering axle structure of the outdoor AGV tractor can effectively improve the load-bearing effect of the bridge body and the structural strength of the bridge body by setting up the upper bridge, the lower bridge, the I-bridge and the cross bridge, making the entire steering axle structure more durable and prolonging its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front cross-sectional structural schematic diagram of an outdoor AGV tractor steering bridge structure proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the top-section structure of a steering bridge structure of an outdoor AGV tractor proposed by the utility model;

[0019] Figure 3 The utility model proposes a steering bridge structure for an outdoor AGV tractor. Figure 2 Schematic diagram of the AA cross-sectional structure of the middle arc connecting rod.

[0020] In the figure: 1. bridge body; 2. wheel hub; 3. steering knuckle; 4. cylinder assembly; 5. brake disc; 6. brake caliper; 7. tapered roller bearing; 8. connecting shaft; 9. steering angle sensor; 10. pulley; 11. transmission belt; 12. arc connecting rod; 13. connecting rod pin; 14. gasket; 15. first oil seal; 16. second oil seal; 17. upper bridge; 18. lower bridge; 19. I-bridge; 20. cross bridge. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-3 The utility model provides a technical solution: a steering bridge structure of an outdoor AGV tractor, comprising a bridge body 1, two wheel hubs 2, two steering knuckles 3, an oil cylinder assembly 4, two brake discs 5 and two brake calipers 6, the oil cylinder assembly 4 and the steering knuckles 3 on the left and right sides are all rotatably connected, the steering knuckle 3 and the bridge body 1 are matched through a tapered roller bearing 7, the steering knuckle 3 and the connecting shaft 8 are fixed by screws, the steering angle sensor 9 is detachably mounted on the upper surface of the bridge body 1 through bolts, and the rotor of the steering angle sensor 9 and the upper end of the connecting shaft 8 are synchronously moved through a transmission assembly, so as to detect the rotation angle and steering direction of the connecting shaft 8. Since the connecting shaft 8 and the steering knuckle 3 are fixed through screws, the steering angle sensor 9 is detachably mounted on the upper surface of the bridge body 1, and the rotor of the steering angle sensor 9 and the upper end of the connecting shaft 8 are synchronously moved through a transmission assembly. This design not only reduces the change of the entire bridge structure and ensures the overall structure of the bridge, but also optimizes the assembly method, improves the assembly efficiency, and makes the entire structure more compact and reduces the occupied space.

[0023] The transmission assembly includes two pulleys 10 and a transmission belt 11. The two pulleys 10 are fixedly connected to the outer surface of the rotor and the connecting shaft 8 respectively. The transmission belt 11 is sleeved on the outer surface of the pulley 10. The rotation of the connecting shaft 8 can drive the pulley 10 to rotate. The rotation of the pulley 10 can drive the transmission belt 11 to rotate. The rotation of the transmission belt 11 can drive the rotor of the steering angle sensor 9 to rotate, so that the rotation angle and steering direction of the connecting shaft 8 can be detected, and then the rotation angle and steering direction of the steering wheel can be calculated. Since the steering wheel turns left or right, it will be detected by the steering angle sensor 9, so that the tractor electronic control unit issues a correct steering command, so that it can realize fully automatic unmanned transportation outdoors.

[0024] In other embodiments, the pulley 10 and the drive belt 11 may be replaced with a sprocket and a chain.

[0025] The cylinder assembly 4 also includes an arc-shaped connecting rod 12, and pin holes are opened on the surfaces of both ends of the arc-shaped connecting rod 12, and connecting rod pins 13 are arranged in the pin holes. The cylinder assembly 4 and the steering knuckle 3 are rotatably connected with the two ends of the arc-shaped connecting rod 12 through the connecting rod pin 13. A gasket 14 is arranged on the surface of the arc-shaped connecting rod 12, and the gasket 14 is fixedly connected to the arc-shaped connecting rod 12 through bolts, and the connecting rod pin 13 passes through the gasket 14. The operation of the cylinder assembly 4 can drive the arc-shaped connecting rod 12 to move, thereby driving the steering knuckle 3 to rotate. By setting the gasket 14, the connecting rod pin 13 and the arc-shaped connecting rod 12 can be protected.

[0026] A first oil seal 15 is arranged between the bridge body 1 and the steering knuckle 3, and a second oil seal 16 is arranged between the bridge body 1 and the connecting shaft 8. Lubricating oil is stored between the first oil seal 15 and the second oil seal 16. By arranging the first oil seal 15, the second oil seal 16 and the lubricating oil, it can be effectively ensured that the steering knuckle 3 and the connecting shaft 8 remain smooth during rotation.

[0027] The wheel hub 2 is arranged on the outer side of the steering knuckle 3 , the brake disc 5 is arranged on the inner side of the steering knuckle 3 , and the brake caliper 6 is arranged on the outer side of the brake disc 5 .

[0028] The bridge body 1 includes an upper bridge 17, a lower bridge 18, an I-shaped bridge 19 and a cross bridge 20. The I-shaped bridge 19 is fixedly connected between the upper bridge 17 and the lower bridge 18, and the cross bridge 20 is fixedly connected between the I-shaped bridge 19 and the lower bridge 18. By arranging the upper bridge 17, the lower bridge 18, the I-shaped bridge 19 and the cross bridge 20, the load-bearing effect of the bridge body 1 can be effectively improved, the structural strength of the bridge body 1 can be improved, the entire steering bridge structure can be made more durable, and the service life can be improved.

[0029] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A steering bridge structure for an outdoor AGV tractor, comprising a bridge body (1), two wheel hubs (2), two steering knuckles (3), a cylinder assembly (4), two brake discs (5) and two brake calipers (6), characterized in that: The oil cylinder assembly (4) and the steering knuckles (3) on the left and right sides are both rotatably connected, the steering knuckle (3) and the bridge body (1) are matched via a tapered roller bearing (7), the steering knuckle (3) and the connecting shaft (8) are fixed via screws, the steering angle sensor (9) is detachably mounted on the upper surface of the bridge body (1) via bolts, and the rotor of the steering angle sensor (9) and the upper end of the connecting shaft (8) are synchronously moved via a transmission assembly, thereby detecting the rotation angle and steering direction of the connecting shaft (8).

2. The outdoor AGV tractor steering axle structure according to claim 1 is characterized by: The transmission assembly comprises two pulleys (10) and a transmission belt (11); the two pulleys (10) are fixedly connected to the outer surfaces of the rotor and the connecting shaft (8) respectively; and the transmission belt (11) is sleeved on the outer surfaces of the pulleys (10).

3. The steering axle structure of an outdoor AGV tractor according to claim 1 is characterized in that: The oil cylinder assembly (4) also includes an arc-shaped connecting rod (12). Pin holes are provided on both end surfaces of the arc-shaped connecting rod (12). Connecting rod pins (13) are provided in the pin holes. The oil cylinder assembly (4) and the steering knuckle (3) are rotatably connected to both ends of the arc-shaped connecting rod (12) via the connecting rod pin (13).

4. The outdoor AGV tractor steering axle structure according to claim 3 is characterized by: A gasket (14) is provided on the surface of the arc-shaped connecting rod (12); the gasket (14) is fixedly connected to the arc-shaped connecting rod (12) by means of bolts, and the connecting rod pin (13) passes through the gasket (14).

5. The steering axle structure of an outdoor AGV tractor according to claim 1 is characterized in that: A first oil seal (15) is arranged between the bridge body (1) and the steering knuckle (3), a second oil seal (16) is arranged between the bridge body (1) and the connecting shaft (8), and lubricating oil is stored between the first oil seal (15) and the second oil seal (16).

6. The outdoor AGV tractor steering axle structure according to claim 1, characterized in that: The wheel hub (2) is arranged on the outside of the steering knuckle (3), the brake disc (5) is arranged on the inside of the steering knuckle (3), and the brake caliper (6) is arranged on the outside of the brake disc (5).

7. The outdoor AGV tractor steering axle structure according to claim 1, characterized in that: The bridge body (1) comprises an upper bridge (17), a lower bridge (18), an I-shaped bridge (19) and a cross bridge (20); the I-shaped bridge (19) is fixedly connected between the upper bridge (17) and the lower bridge (18); and the cross bridge (20) is fixedly connected between the I-shaped bridge (19) and the lower bridge (18).

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