Land leveler and steering front axle thereof

Abstract

The utility model relates to a land leveler, in order to solve the problem that a steering oil cylinder of a steering front axle of the land leveler is prone to being abraded and damaged, the steering front axle of the land leveler comprises the steering oil cylinder, a bridge frame and steering knuckles arranged at the two ends of the bridge frame, and the end of a cylinder body of the steering oil cylinder is connected with the steering knuckles. And the end part of a piston rod of the steering oil cylinder is connected with the bridge frame. In the utility model, the cylinder body of the steering oil cylinder is connected with the steering knuckle, and when one side of the front wheel sinks into a mud pit, the cylinder body is contacted with the ground, so that the piston rod of the steering oil cylinder can be prevented from being abraded by mud when the front wheel on one side sinks into the mud pit to cause premature damage of the oil cylinder.

Description

Technical Field

[0001] The utility model relates to a grader, and more specifically, to a grader and its front steering axle. Background Art

[0002] In the front steering axle of a grader, the steering knuckles are arranged at both ends of the bridge frame. The cylinder body of the steering cylinder is connected to the bridge frame, and the piston rod of the steering cylinder is connected to the steering knuckle. The wheel steering is realized by the extension or retraction of the piston rod, that is, the wheel steering is realized by the moving piston rod.

[0003] In the existing front steering axle of a grader, when one side of the wheel gets stuck in a pit, the exposed surface of the piston rod is easily bruised by the sand and gravel at the edge of the pit, resulting in oil leakage of the steering cylinder; or when one side of the wheel is stuck in a mud pit and steering, the exposed surface of the piston rod is easily abraded by the sediment, eventually resulting in oil leakage of the steering cylinder. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is the problem that the steering cylinder of the front steering axle of a grader is easily abraded and damaged, and a grader and its front steering axle are provided, which can provide good protection for the steering cylinder.

[0005] The technical solution of the utility model to achieve its purpose is: a front steering axle of a grader, including a steering cylinder, a bridge frame, and steering knuckles arranged at both ends of the bridge frame. The end of the cylinder body of the steering cylinder is connected to the steering knuckle, and the end of the piston rod of the steering cylinder is connected to the bridge frame.

[0006] In the front steering axle of the grader of the utility model, a ball joint for connecting with the steering knuckle is arranged at the end of the cylinder body of the steering cylinder, and a spherical plain bearing for connecting with the bridge frame is arranged at the end of the piston rod of the steering cylinder.

[0007] In the front steering axle of the grader of the utility model, the height of the position where the end of the piston rod of the steering cylinder is connected to the bridge frame is higher than the height of the position where the end of the cylinder body of the steering cylinder is connected to the steering knuckle.

[0008] In the front steering axle of the grader of the utility model, a steering tie rod is connected between the two steering knuckles.

[0009] In the front steering axle of the grader of the utility model, an inclination cylinder is further included. At each end of the bridge frame, an inclination joint is installed through a pin shaft, and an inclination tie rod is connected between the two inclination joints at both ends; the steering knuckle is installed on the corresponding inclination joint through a pin shaft; one end of the inclination cylinder is connected to the bridge frame, and the other end is connected to the inclination joint.

[0010] In the front steering axle of the grader of the utility model, the inclination cylinder is arranged at the front side of the bridge frame, and the steering cylinder is arranged at the rear side of the bridge frame.

[0011] In the front steering axle of the grader of the present utility model, a protective plate is further included, and the protective plate is fixedly installed on the lower side of the bridge frame and extends below the piston rod of the steering cylinder.

[0012] In the front steering axle of the grader of the present utility model, the end of the protective plate facing the end of the bridge frame extends beyond the longest range where the piston rod of the steering cylinder extends and is exposed.

[0013] In the front steering axle of the grader of the present utility model, there are two steering cylinders which are symmetrically arranged about the middle plane of the bridge frame, and the protective plate is arranged in the middle of the bridge frame.

[0014] The technical solution for the present utility model to achieve its purpose is: a grader having the aforementioned front steering axle of the grader.

[0015] Compared with the prior art, in the present utility model, the cylinder body of the steering cylinder is connected to the steering knuckle. When one side of the front wheel gets stuck in a mud pit, the part in contact with the ground is the cylinder body, which can prevent the piston rod of the steering cylinder from being worn by mud when one side of the front wheel is stuck in a pit, resulting in premature damage to the cylinder. Installing a protective plate on the lower side of the bridge frame to protect the piston rod part of the steering cylinder can further protect the steering cylinder from being worn by sediment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the front steering axle of the grader of the present utility model.

[0017] Figure 2 It is a schematic structural diagram of the front steering axle of the grader of the present utility model.

[0018] Figure 3 It is a schematic structural diagram of the steering cylinder in the front steering axle of the grader of the present utility model.

[0019] Names and serial numbers of components in the figure:

[0020] Bridge frame 1, left tilt joint 2, left steering knuckle 3, left wheel hub 4, left steering cylinder 5, steering tie rod 6, protective plate 7, right steering cylinder 8, right steering knuckle 9, right wheel hub 10, right tilt joint 11, tilt cylinder 12, tilt tie rod 13.

[0021] Tilt pin 21, steering pin 31, first ball joint pin 32, second ball joint pin 33, first pin 34, second pin 35.

[0022] Piston rod 51, cylinder body 52, ball hinge 53, spherical plain bearing 54. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following describes the specific implementation manners in conjunction with the drawings.

[0024] As Figure 1Figure 2 As shown, the front steering axle of a motor grader includes a steering cylinder, a bridge 1, and steering knuckles arranged at both ends of the bridge 1. The end of the cylinder body of the steering cylinder is connected to the steering knuckle, and the end of the piston rod of the steering cylinder is connected to the bridge. With this structure, the cylinder body of the steering cylinder is closer to the wheels at the same end relative to the piston rod. When a wheel at one end of the bridge gets stuck in a pit, the position height of the piston rod of the steering cylinder is relatively higher than that of the cylinder body, and the piston rod of the steering cylinder is not easily in contact with the ground and thus not easily worn or damaged.

[0025] Optionally, the front steering axle of the motor grader further includes an inclination cylinder 12. At both ends of the bridge 1, inclination joints are installed through inclination pins 21, and an inclination tie rod 13 is connected between the inclination joints at both ends. As Figure 1 shown, the two inclination joints are the left inclination joint 2 and the right inclination joint 11 respectively. The left inclination joint 2 is installed at the left end of the bridge 1 through the inclination pin 21, and the right inclination joint 11 is installed at the right end of the bridge 1 through the inclination pin 21, and they are connected at the top by the inclination tie rod 13.

[0026] One end of the inclination cylinder 12 is connected to the bridge 1, and the other end is connected to the right inclination joint 11. When the inclination cylinder 12 expands and contracts, the inclination cylinder 12 pushes the right inclination joint 11 to make an inclined swing around the inclination pin 21, and the right inclination joint 11 pushes the left inclination joint 2 to make a synchronous inclined swing through the inclination tie rod 13. Preferably, the inclination cylinder 12 is arranged at the front side of the bridge 1, and the steering cylinder is arranged at the rear side of the bridge 1.

[0027] As Figure 1 shown, the left steering knuckle 3 at the left end of the bridge 1 is installed on the left inclination joint 3 through a steering pin 31, and the right steering knuckle 9 at the right end of the bridge 1 is installed on the right inclination joint 9 through a steering pin 31. A steering tie rod 6 is connected between the left steering knuckle 3 and the right steering knuckle 9 at both ends of the bridge 1; the steering tie rod 6 makes the left steering knuckle 3 and the right steering knuckle 9 at both ends of the bridge 1 make synchronous and same-angle steering swings. A left wheel hub 4 is installed on the left steering knuckle 3, and a right wheel hub 10 is installed on the right steering knuckle 9.

[0028] Optionally, there are two steering cylinders which are symmetrically arranged with respect to the middle plane of the bridge 1. As Figure 1 shown, the two steering cylinders are the left steering cylinder 5 and the right steering cylinder 8 respectively. The cylinder body of the left steering cylinder 5 is connected to the left steering knuckle 3, the cylinder body of the right steering cylinder 8 is connected to the right steering knuckle 9, and the piston rods of the left steering cylinder 5 and the right steering cylinder 8 are both connected to the bridge 1.

[0029] As Figure 2 Figure 3As shown in the figure, in the left steering cylinder 5 and the right steering cylinder 8, a ball joint 53 for connecting with the steering knuckle is provided at the end of the cylinder block 52, and a spherical plain bearing 54 for connecting with the bridge 1 is provided at the end of the piston rod 51. The first ball pin 32 and the second ball pin 33 are provided on both the left steering knuckle 3 and the right steering knuckle 9. The first ball pin 32 on the left steering knuckle 3 is connected to the left end of the steering tie rod 6, and the first ball pin 32 on the right steering knuckle 9 is connected to the right end of the steering tie rod 6. The second ball pin 33 on the left steering knuckle 3 is connected to the ball joint 53 on the cylinder block of the left steering cylinder 5, and the second ball pin 33 on the right steering knuckle 9 is connected to the ball joint 53 on the cylinder block of the right steering cylinder. The first pin shaft 34 and the second pin shaft 35 are provided on the bridge 1. The first pin shaft 34 is connected to the spherical plain bearing 54 on the left steering cylinder 5, and the second pin shaft 35 is connected to the spherical plain bearing 54 on the right steering cylinder 8. Further, the height of the connection position between the piston rod end of the left steering cylinder 5 and the right steering cylinder 8 and the bridge 1 is higher than the height of the connection position between the cylinder block end and the steering knuckle.

[0030] Optionally, as Figure 1 shown, the front steering axle of the motor grader further includes a protective plate 7. The protective plate 7 is fixedly installed on the lower side of the bridge 1 and extends below the piston rod of the steering cylinder. Further, the end of the protective plate 7 facing the end of the bridge 1 extends beyond the longest exposed range of the piston rod of the steering cylinder. That is, when the steering cylinder reaches the longest extension stroke, the extended end of the piston rod of the steering cylinder block is still above the protective plate 7, so that no matter how long the piston rod of the steering cylinder extends, the piston rod can be effectively protected by the protective plate. Further, the protective plate 7 is arranged in the middle of the bridge. Its left and right ends extend towards the ends of the bridge 1, and in the front and back directions, it extends to the lower part of the piston rods of the left steering cylinder 5 and the right steering cylinder 8 to protect the piston rods of the steering cylinders.

[0031] This embodiment also provides a motor grader having the aforementioned front steering axle of the motor grader.

[0032] In this embodiment, the cylinder block of the steering cylinder is connected to the steering knuckle. When one side of the front wheel gets stuck in a mud pit, the position of the piston rod is relatively high, which can reduce the situation that the piston rod of the steering cylinder is worn by mud when one side of the front wheel is stuck in a pit, resulting in premature damage to the cylinder. Installing a protective plate on the lower side of the bridge to protect the piston rod part of the steering cylinder can further protect the steering cylinder from being worn by sediment.

Claims

1. A grader front axle for steering, comprising a steering cylinder, a bridge frame, and steering knuckles arranged at both ends of the bridge frame, characterized in that, The end of the cylinder body of the steering cylinder is connected to the steering knuckle, and the end of the piston rod of the steering cylinder is connected to the bridge; the height of the position where the end of the piston rod of the steering cylinder is connected to the bridge is higher than the height of the position where the end of the cylinder body of the steering cylinder is connected to the steering knuckle.

2. The grader front axle for turning according to claim 1, characterized in that, A ball joint for connecting with the steering knuckle is arranged at the end of the cylinder body of the steering cylinder, and a spherical plain bearing for connecting with the bridge is arranged at the end of the piston rod of the steering cylinder.

3. The front steering axle of the motor grader according to claim 1, wherein A steering tie rod is connected between the two steering knuckles.

4. The grader front steering axle according to claim 1, wherein, It further includes an inclination cylinder. Tilt joints are installed at both ends of the bridge through pin shafts, and a tilt tie rod is connected between the tilt joints at both ends; the steering knuckle is installed on the corresponding tilt joint through a pin shaft; one end of the inclination cylinder is connected to the bridge, and the other end is connected to the tilt joint.

5. The grader front steering axle according to claim 4, wherein, The inclination cylinder is arranged on the front side of the bridge, and the steering cylinder is arranged on the rear side of the bridge.

6. The grader front steering axle according to any one of claims 1 to 5, characterized in that, It further includes a protective plate, and the protective plate is fixedly installed on the lower side of the bridge and extends below the piston rod of the steering cylinder.

7. The grader front steering axle according to claim 6, wherein, The end of the protective plate facing the end of the bridge extends beyond the longest range where the piston rod of the steering cylinder extends and is exposed.

8. The front steering axle of the motor grader according to claim 6, characterized in that, There are two steering cylinders, which are symmetrically arranged with respect to the middle plane of the bridge, and the protective plate is arranged in the middle of the bridge.

9. A grader, characterized in that, It has the front steering axle of a motor grader according to any one of claims 1 to 8.

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