Steering axle connecting structure of off-highway mining dump truck

Abstract

The utility model discloses a steering axle connecting structure of an off-highway mining dump truck, which comprises a suspension cylinder and a ring beam, the suspension cylinder comprises a cylinder barrel and a piston rod, the cylinder barrel is hinged with the ring beam, the steering axle integrally forms a component with a steering axis inner hole, and the piston rod is inserted into the steering axis inner hole; a steering knuckle head of the steering knuckle arm is coaxially and fixedly connected to the lower portion of a steering axis inner hole in the component, and a pin shaft extending to the lower portion of the steering knuckle head is arranged in the steering knuckle head in a penetrating mode; a main pin hole of the lower swing arm is hinged to the shaft section, located below the steering knuckle head, of the pin shaft through a knuckle bearing, and a lifting lug of the lower swing arm is hinged to the ring beam. The piston rod does not directly bear the transverse force and the longitudinal traction force of the lower swing arm, the stress on the piston rod is simple, and the faults of piston rod breakage and oil leakage of the suspension cylinder are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of off-road mining dump trucks, and more specifically, to a steering axle connection structure of an off-road mining dump truck. Background Art

[0002] Currently, the mainstream front suspension structures for off-highway mining dump trucks are mainly McPherson oil-gas suspension and candle oil-gas suspension. The advantage of these two suspension structures is that the left and right suspensions are independent of each other, resulting in high driving comfort, good trafficability, and reliable load-bearing. This structure is widely used in mining vehicles. However, in these two suspension structures, the piston rod of the suspension cylinder is generally directly articulated to the steering knuckle arm and the lower swing arm. Therefore, the piston rod of the suspension cylinder is subject to lateral forces and longitudinal traction transmitted by the lower swing arm. The piston rod of the suspension cylinder is constrained in the suspension cylinder and can only move up and down along the cylinder axis. This makes the piston rod of the suspension cylinder prone to breakage and causes oil leakage in the suspension cylinder. Summary of the Invention

[0003] The purpose of the present utility model is to provide a steering axle connection structure for an off-road mining dump truck to solve the above problems and provide at least the advantages to be described later.

[0004] In order to achieve these objects and other advantages according to the utility model, a steering axle connection structure for an off-road mining dump truck is provided, which is used to connect a ring beam and a steering axle located outside the ring beam, wherein the steering axle is formed as an integral component having an inner hole of a steering axis;

[0005] The steering axle connection structure includes:

[0006] A suspension cylinder comprising a cylinder barrel and a piston rod, wherein the cylinder barrel is hinged to the ring beam and the piston rod is inserted into the inner hole of the steering axis;

[0007] A steering knuckle arm, wherein the steering knuckle head is coaxially fixed to the lower part of the inner hole of the steering axis on the component, and a pin shaft is passed through the steering knuckle head and extends to the lower part of the steering knuckle head;

[0008] The main pin hole of the lower swing arm is hinged to the shaft section of the pin shaft located below the steering knuckle head through a joint bearing, and the lifting ear of the lower swing arm is hinged to the ring beam.

[0009] Preferably, the inner hole of the steering axis is configured as a tapered hole that is larger at the top and smaller at the bottom, the end of the piston rod is configured as a tapered rod that matches the tapered hole, and the end of the piston rod is inserted into the inner hole of the steering axis.

[0010] Preferably, a countersunk hole is formed on the component and is coaxially located below the inner hole of the steering axis. The diameter of the countersunk hole is larger than the minimum diameter of the inner hole of the steering axis. A connecting plate with a thickness less than the depth of the countersunk hole is provided in the countersunk hole, and the connecting plate is connected to the end of the piston rod by bolts.

[0011] Preferably, there is a gap of 5 to 10 mm between the end of the piston rod and the connecting plate.

[0012] Preferably, the component is connected to the steering knuckle head via bolts.

[0013] Preferably, a continuous first flat keyway is provided on the top surface of the steering knuckle head and the head of the pin shaft, and a second flat keyway is provided on the bottom surface of the component opposite to the first flat keyway, and flat keys are provided in the first and second flat keyways.

[0014] Preferably, the flat key is bolted to the first flat keyway.

[0015] Preferably, the pin shaft is a stepped shaft, the head portion close to the pin shaft is a large diameter shaft section, the hole in the steering knuckle head for passing the pin shaft is a stepped hole with a larger top and a smaller bottom, the large diameter shaft section of the stepped shaft abuts against the stepped surface of the stepped hole, and the small diameter shaft section of the stepped shaft extends to the bottom of the steering knuckle head.

[0016] Preferably, the inner ring of the spherical bearing is sleeved on the small diameter shaft section of the stepped shaft, and the outer ring of the spherical bearing is fixed in the main pin hole of the lower swing arm;

[0017] The bottom surface of the steering knuckle head is set as a step surface, the outer diameter of the step surface is the same as the outer diameter of the inner ring of the spherical plain bearing, and the top surface of the inner ring of the spherical plain bearing abuts against the step surface;

[0018] An inner baffle is provided below the spherical bearing, the outer diameter of the inner baffle is the same as the outer diameter of the inner ring of the spherical bearing, the bottom surface of the inner ring of the spherical bearing abuts against the top surface of the inner baffle, and the inner baffle is bolted to the lower end of the stepped shaft;

[0019] An outer baffle is bolted below the main pin hole of the lower swing arm, and the outer baffle is used to seal the lower end of the main pin hole of the lower swing arm.

[0020] Preferably, the lower swing arm is A-shaped, the main pin hole is arranged at the head of the lower swing arm, and the lifting ears are arranged at the two tails of the lower swing arm.

[0021] The present invention includes at least the following beneficial effects: the piston rod of the suspension cylinder is inserted into the component of the steering axle, the steering knuckle head of the steering knuckle arm is connected to the lower end of the component of the steering axle, and the lower swing arm is hinged on the pin shaft arranged in the steering knuckle head through a joint bearing. Therefore, the piston rod has no direct connection with the steering knuckle arm and the lower swing arm, which makes the piston rod not directly bear the lateral force and longitudinal traction force of the lower swing arm, and the force on the piston rod is simple, which reduces the failure of the piston rod breakage and the oil leakage of the suspension cylinder.

[0022] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a side structural diagram of the utility model;

[0024] Figure 2 A top view of the bottom of the body of the present invention;

[0025] Figure 3 This is a disassembled schematic diagram of the piston rod, steering bridge and connecting plate of the utility model;

[0026] Figure 4 This is a schematic structural diagram of the inner hole of the steering axis in the steering axle of the present invention;

[0027] Figure 5 This is a disassembled schematic diagram of the flat key, stepped shaft, and steering knuckle arm of the utility model;

[0028] Figure 6 for Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0029] Figure 7 This is a disassembled schematic diagram of the steering knuckle arm, joint bearing, lower swing arm and other structures of the present invention;

[0030] The reference numerals are as follows: ring beam 100, suspension cylinder 200, steering axle 300;

[0031] Cylinder-1, piston rod-2, connecting plate-3, flat key-4, stepped shaft-5, steering knuckle arm-6, spherical bearing-7, lower control arm-8, inner baffle-9, outer baffle-10, first bolt-11, second bolt-12, third bolt-13. DETAILED DESCRIPTION

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0033] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0034] like Figures 1 to 7 As shown, the present invention provides a steering axle connection structure for an off-road mining dump truck, which is used to connect a ring beam 100 and a steering axle 300 located outside the ring beam 100, wherein the steering axle 300 is formed as an integral component having an inner hole of a steering axis;

[0035] The steering bridge 300 connection structure includes:

[0036] The suspension cylinder 200 includes a cylinder barrel 1 and a piston rod 2. The cylinder barrel 1 is hinged to the ring beam 100, and the piston rod 2 is inserted into the inner hole of the steering axis.

[0037] A steering knuckle arm 6, the steering knuckle head of which is coaxially fixed to the lower part of the inner hole of the steering axis on the component, and a pin extending to the lower part of the steering knuckle head is passed through the steering knuckle head;

[0038] The main pin hole of the lower swing arm 8 is hinged to the shaft section of the pin shaft located below the steering knuckle head through a joint bearing 7, and the lifting ear of the lower swing arm 8 is hinged to the ring beam 100.

[0039] In the above embodiment, the piston rod 2 of the suspension cylinder 200 is inserted into the component of the steering bridge 300, the steering knuckle head of the steering knuckle arm 6 is connected to the lower end of the component of the steering bridge 300, and the lower swing arm 8 is hinged to the pin shaft arranged in the steering knuckle head through the joint bearing 7. Therefore, the piston rod 2 has no direct connection with the steering knuckle arm 6 and the lower swing arm 8, which makes the piston rod 2 not directly bear the lateral force and longitudinal traction force of the lower swing arm 8, and the force on the piston rod 2 is simple, thereby reducing the failure of the piston rod 2 to break and the oil leakage of the suspension cylinder 200.

[0040] Optionally, in this embodiment of the present invention, the top of the cylinder 1 is hingedly connected to the ring beam 100 via a spherical bearing 7. The inner bore of the steering axis is configured as a tapered hole with a larger top and a smaller bottom. The end of the piston rod 2 is configured as a tapered rod that matches the tapered hole, and the end of the piston rod 2 is inserted into the inner bore of the steering axis. During vehicle operation, the front axle load is transmitted to the steering axle 300 via the suspension cylinder 200, causing the tapered surface of the suspension cylinder 200 piston rod 2 to fit increasingly tightly with the tapered surface of the steering axle 300 components, preventing them from becoming loose.

[0041] Optionally, in an embodiment of the present invention, the component is formed with a countersunk hole coaxially located below the inner bore of the steering axis. The diameter of the countersunk hole is larger than the minimum diameter of the inner bore of the steering axis. A connecting plate 3 having a thickness less than the depth of the countersunk hole is disposed within the countersunk hole. The connecting plate 3 is bolted to the end of the piston rod 2. The bolted connection is specifically configured as follows: a first threaded hole is disposed on the end surface of the piston rod 2, and a first through hole is disposed on the connecting plate 3 opposite the first threaded hole. The first through hole and the first threaded hole are provided with a first bolt 11 for connecting the piston rod 2 to the connecting plate 3. In this embodiment, the connecting plate 3 bolts the piston rod 2 to the steering axle 300. This, combined with the aforementioned tapered fit between the piston rod 2 and the steering axle 300, provides a double safeguard, significantly reducing the risk of loosening of the steering axle 300 and the piston rod 2. When the vehicle traverses uneven roads, the steering axle 300 drives the piston rod 2 up and down. When the vehicle needs to turn, the steering axle 300 drives the piston rod 2 to rotate together.

[0042] Optionally, in an embodiment of the present invention, there is a gap of 5 to 10 mm between the end of the piston rod 2 and the connecting plate 3, which reserves a certain movement margin for the piston rod 2 and ensures flexibility in installation and use.

[0043] Optionally, in an embodiment of the present invention, the component is bolted to the steering knuckle head. The bolted connection is as follows: a circle of second threaded holes is defined on the lower end surface of the component around the inner hole of the steering axis; a second through-hole is defined on the steering knuckle head, positioned opposite the second threaded holes; and second bolts 12 are positioned in the second through-hole and the second threaded hole to connect the steering knuckle head to the component. In this embodiment, when the component is bolted to the steering knuckle head, steering power from the steering knuckle arm 6 is transmitted to the component, driving the steering axle 300 to rotate.

[0044] Optionally, in an embodiment of the present invention, a continuous first flat key groove is provided on the top surface of the steering knuckle head and the head of the pin shaft, and a second flat key groove opposite to the first flat key groove is provided on the bottom surface of the component, and a flat key 4 is provided in the first flat key groove and the second flat key groove.

[0045] Specifically, the flat key 4 is bolted to the first flat keyway. The bolted connection is as follows: a third threaded hole is defined at the bottom of the first flat keyway on the top surface of the steering knuckle head, and a third through-hole is defined in the flat key 4. A third bolt 13 passes through the third through-hole to secure the flat key 4 in the first flat keyway, ensuring that the flat key 4 does not loosen or become ineffective. The flat key 4 and both keyways form a transition fit. In this embodiment, the provision of the flat key 4 limits the rotation of the steering knuckle arm 6 about the steering axle 300, overcomes the shear force transmitted by the steering knuckle arm 6, and prevents breakage of the second bolt 12 connecting the steering knuckle head to the component.

[0046] Optionally, in an embodiment of the present invention, the pin is a stepped shaft 5, with a large-diameter shaft section near the head of the pin. The hole in the knuckle head for receiving the pin is a stepped hole with a larger diameter at the top and a smaller diameter at the bottom. The large-diameter shaft section of the stepped shaft 5 abuts the stepped surface of the stepped hole, and the small-diameter shaft section of the stepped shaft 5 extends below the knuckle head. In this embodiment, the pin is configured as a stepped shaft 5, and the hole in the knuckle head for receiving the pin is configured as a stepped hole. This can limit the vertical movement of the stepped shaft 5 and increase the reliability of the pin connection.

[0047] Optionally, in an embodiment of the present utility model, the inner ring of the spherical bearing 7 is sleeved on the small diameter shaft section of the stepped shaft 5, and the outer ring of the spherical bearing 7 is fixed in the main pin hole of the lower swing arm 8;

[0048] The bottom surface of the steering knuckle is set as a step surface, the outer diameter of the step surface is the same as the outer diameter of the inner ring of the spherical plain bearing 7, and the top surface of the inner ring of the spherical plain bearing 7 abuts against the step surface;

[0049] An inner baffle 9 is provided below the spherical bearing 7. The outer diameter of the inner baffle 9 is the same as the outer diameter of the inner ring of the spherical bearing 7. The bottom surface of the inner ring of the spherical bearing 7 abuts against the top surface of the inner baffle 9. The inner baffle 9 is bolted to the lower end of the stepped shaft 5.

[0050] An outer baffle 10 is bolted below the main pin hole of the lower swing arm 8 , and the outer baffle 10 is used to seal the lower end of the main pin hole of the lower swing arm 8 .

[0051] In this embodiment, the outer diameter of the step surface and the outer diameter of the inner baffle 9 are the same as the outer diameter of the inner ring of the spherical bearing 7, which can prevent the spherical bearing 7 from interfering with and getting stuck during movement. The outer baffle 10 is connected to the lower end of the kingpin hole of the lower swing arm 8 by bolts, and can be used to protect the spherical bearing 7 in the kingpin hole of the lower swing arm 8, preventing external mud and sand from invading the kingpin hole, causing the spherical bearing 7 to be contaminated by mud and sand and causing sluggish operation.

[0052] Optionally, in an embodiment of the present utility model, the lower swing arm 8 is A-shaped, the kingpin hole is arranged at the head of the lower swing arm 8, and the lifting ears are arranged at the two tails of the lower swing arm 8. The lower swing arm 8 can cooperate well with the ring beam 100 to bear the longitudinal traction, braking force, lateral force and torque generated during the movement of the vehicle.

[0053] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A steering axle connection structure for an off-road mining dump truck, used to connect a ring beam and a steering axle located outside the ring beam, characterized in that: The steering axle is integrally formed with a component having an inner hole of a steering axis; The steering axle connection structure includes: A suspension cylinder comprising a cylinder barrel and a piston rod, wherein the cylinder barrel is hinged to the ring beam and the piston rod is inserted into the inner hole of the steering axis; A steering knuckle arm, wherein the steering knuckle head is coaxially fixed to the lower part of the inner hole of the steering axis on the component, and a pin shaft is passed through the steering knuckle head and extends to the lower part of the steering knuckle head; The main pin hole of the lower swing arm is hinged to the shaft section of the pin shaft located below the steering knuckle head through a joint bearing, and the lifting ear of the lower swing arm is hinged to the ring beam.

2. The steering axle connection structure of an off-road mining dump truck according to claim 1, characterized in that: The inner hole of the steering axis is configured as a tapered hole that is larger at the top and smaller at the bottom, and the end of the piston rod is configured as a tapered rod that is adapted to the tapered hole. The end of the piston rod is inserted into the inner hole of the steering axis.

3. The steering axle connection structure of an off-road mining dump truck according to claim 2, characterized in that: A countersunk hole is formed on the component and is coaxially located below the inner hole of the steering axis. The diameter of the countersunk hole is larger than the minimum diameter of the inner hole of the steering axis. A connecting plate with a thickness less than the depth of the countersunk hole is provided in the countersunk hole. The connecting plate is connected to the end of the piston rod by bolts.

4. The steering axle connection structure of an off-road mining dump truck according to claim 3, characterized in that: There is a gap of 5 to 10 mm between the end of the piston rod and the connecting plate.

5. The steering axle connection structure of an off-road mining dump truck according to claim 1, characterized in that: The component is connected to the steering knuckle head through bolts.

6. The steering axle connection structure of an off-road mining dump truck according to claim 5, characterized in that: A continuous first flat key groove is provided on the top surface of the steering knuckle head and the head of the pin shaft, and a second flat key groove opposite to the first flat key groove is provided on the bottom surface of the component, and flat keys are provided in the first and second flat key grooves.

7. The steering axle connection structure of an off-highway mining dump truck according to claim 6, characterized in that: The flat key is bolted to the first flat keyway.

8. The steering axle connection structure of an off-highway mining dump truck according to claim 1, characterized in that: The pin shaft is a stepped shaft, and the large-diameter shaft section is close to the head of the pin shaft. The hole in the steering knuckle head for passing the pin shaft is a stepped hole with a larger top and a smaller bottom. The large-diameter shaft section of the stepped shaft abuts against the stepped surface of the stepped hole, and the small-diameter shaft section of the stepped shaft extends to the bottom of the steering knuckle head.

9. The steering axle connection structure of an off-road mining dump truck according to claim 8, characterized in that: The inner ring of the spherical bearing is sleeved on the small diameter shaft section of the stepped shaft, and the outer ring of the spherical bearing is fixed in the main pin hole of the lower swing arm; The bottom surface of the steering knuckle head is set as a step surface, the outer diameter of the step surface is the same as the outer diameter of the inner ring of the spherical plain bearing, and the top surface of the inner ring of the spherical plain bearing abuts against the step surface; An inner baffle is provided below the spherical bearing, the outer diameter of the inner baffle is the same as the outer diameter of the inner ring of the spherical bearing, the bottom surface of the inner ring of the spherical bearing abuts against the top surface of the inner baffle, and the inner baffle is bolted to the lower end of the stepped shaft; An outer baffle is bolted below the main pin hole of the lower swing arm, and the outer baffle is used to seal the lower end of the main pin hole of the lower swing arm.

10. The steering axle connection structure of an off-highway mining dump truck according to claim 1, characterized in that: The lower swing arm is A-shaped, the main pin hole is arranged at the head of the lower swing arm, and the lifting ears are arranged at the two tails of the lower swing arm.

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