Supporting leg structure of excavator

Abstract

The utility model relates to the technical field of traction mechanisms, and provides an excavator landing leg structure which comprises a mounting frame, a landing leg arm, a lug plate and positioning plates, the landing leg arm is rotatably mounted at the bottom of the mounting frame, the lug plate is mounted on the upper side of the landing leg arm, a pair of positioning plates is mounted on the upper side of the mounting frame, and the lug plate is movably arranged between the positioning plates. And a pin shaft is arranged in a manner of penetrating through the lug plate and the positioning plate, so that the problem that the supporting leg suddenly falls in the existing retracted state can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of excavator structures, in particular to an excavator support leg structure. Background Art

[0002] When working, wheel excavators often have their outriggers extended to enhance stability. During wheel excavation, the outrigger cylinders play a crucial role, both opening and retracting the outriggers and cushioning the impact of changes in the digging arm's load on the outriggers. However, in extreme situations, such as the fall of a heavy object or a sudden change in the digging arm's load, the force transmitted to the outriggers can easily damage the cylinder balls. To address these load changes during support, refer to the tire excavator outrigger cylinder protection device (Announcement No. CN203996153U). This device cushions the outrigger cylinders from impacts.

[0003] The above-mentioned outrigger oil cylinder protection device can enhance the protection strength when the outrigger is under the vehicle and improve the working stability of the vehicle. However, there are the following technical problems when the outrigger is retracted:

[0004] After the outriggers are retracted, the oil cylinder faces the direction of the excavator and maintains the retracted and folded state of the outriggers through pulling force. However, if the new excavator is used for a period of time without timely maintenance and care, the main relief valve will be worn and aged. The main relief valve is a hydraulic valve in the main oil circuit of the excavator. It is mainly used to prevent the oil tank pressure from being too high and damaging the hydraulic equipment. If the main relief valve cannot work properly, it will cause the pressure of the excavator hydraulic system to be too high, which will cause the excavator to malfunction and the arm to fall. The main relief valve fails, the oil cylinder no longer provides pulling force, and the outriggers will suddenly fall. Utility Model Content

[0005] The utility model aims to provide an excavator outrigger structure, which can solve the problem of sudden falling of the outriggers in the existing retracted state.

[0006] To achieve the above-mentioned purpose, the utility model proposes an excavator leg structure, including a mounting frame, a leg arm, an ear plate and a positioning plate. The leg arm is rotatably mounted on the bottom of the mounting frame, the ear plate is installed on the upper side of the leg arm, and a pair of positioning plates are installed on the upper side of the mounting frame. The ear plate is movably arranged between the positioning plates, and a pin shaft is set through the ear plate and the positioning plate.

[0007] It is further configured that the positioning plate is provided with a plurality of through holes, and the ear plate is provided with a through hole.

[0008] It is further configured that the pin shaft is provided with a socket, a pin is movably provided in the socket, and the pin is formed by bending a metal wire.

[0009] It is further configured that the positioning plate is configured to be trapezoidal, and a rounded corner is configured on one side corner of the positioning plate close to the ear plate.

[0010] It is further configured that the end of the ear plate is configured to be semicircular to prevent the end of the ear plate from touching the surface of the mounting frame and causing damage to the mounting frame.

[0011] It is further configured that the mounting frame is hollow and the support leg arm is movably arranged in the mounting frame.

[0012] It is further configured that the spacing between the positioning plates is greater than the thickness of the ear plates.

[0013] It is further configured that the ear plate is perpendicular to the upper side wall of the mounting frame, and the positioning plate is perpendicular to the upper side wall of the mounting frame.

[0014] It is further configured that a rotating shaft is installed at the bottom of the support leg arm, and a circular hole is provided on the mounting frame corresponding to the rotating shaft, and the rotating shaft is provided in the circular hole.

[0015] It is further configured that a cylinder is provided at the end of the support leg arm, and the support leg is connected via a rotating shaft inside the cylinder.

[0016] Beneficial effects of one or more of the above technical solutions:

[0017] When the outrigger is retracted, insert the pin into the through-hole, and then insert the plug into the socket to prevent the pin from moving along the axial direction of the through-hole. At this time, even if the arm falls, the pin can still support the outrigger arm to prevent the outrigger from falling suddenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation on this application.

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 It is a schematic diagram of the explosion structure of the utility model.

[0021] In the figure, 1 is a mounting frame; 2 is a support leg arm; 3 is an ear plate; 4 is a positioning plate; 5 is a pin; 6 is a through hole; 7 is a plug hole; 8 is a latch; 9 is a fillet; 10 is a rotating shaft; 11 is a round hole; 12 is a U-shaped pull ring; 13 is a cylinder; and 14 is a support leg. DETAILED DESCRIPTION

[0022] The specific implementation of this embodiment is described below with reference to the accompanying drawings.

[0023] Reference Figure 1 and Figure 2A support leg structure of an excavator includes a mounting frame 1, a support leg arm 2, an ear plate 3 and a positioning plate 4. The support leg arm 2 is rotatably mounted on the bottom of the mounting frame 1, the ear plate 3 is mounted on the upper side of the support leg arm 2, a pair of positioning plates 4 are mounted on the upper side of the mounting frame 1, the ear plate 3 is movably arranged between the positioning plates 4, and a pin shaft 5 is set through the ear plate 3 and the positioning plate 4.

[0024] The positioning plate 4 is provided with a plurality of through-holes 6, and the ear plate 3 is provided with a through-hole 6. Since the hydraulic cylinder stops working after the support leg arm 2 is retracted, the hydraulic cylinder cannot completely stop at the preset position at this time. Therefore, in order to ensure that the through-holes 6 can correspond, multiple through-holes 6 are provided.

[0025] The pin shaft 5 is provided with a socket 7, in which a latch 8 is movably provided. The latch 8 is formed by bending a metal wire. When the support leg arm 2 is retracted, the pin shaft 5 is inserted into the through-hole 6 and then the latch 8 is inserted into the socket 7 to prevent the pin shaft 5 from moving axially along the through-hole 6.

[0026] The positioning plate 4 is set to be trapezoidal, and a rounded corner 9 is set on one side corner of the positioning plate 4 close to the ear plate 3. The end of the ear plate 3 is set to be semicircular to prevent the end of the ear plate 3 from touching the surface of the mounting frame 1 and causing damage to the mounting frame 1.

[0027] The mounting frame 1 is hollow, and the outrigger arm 2 is movably arranged in the mounting frame 1. A rotating shaft 10 is installed at the bottom of the outrigger arm 2. The mounting frame 1 is provided with a circular hole 11 corresponding to the rotating shaft 10. The rotating shaft 10 is arranged in the circular hole 11. An oil cylinder is provided in the mounting frame 1 to drive the outrigger arm 2 to move.

[0028] The ear plate 3 is perpendicular to the upper side wall of the mounting frame 1 , the positioning plate 4 is perpendicular to the upper side wall of the mounting frame 1 , and the spacing between the positioning plates 4 is greater than the thickness of the ear plate 3 to ensure that the ear plate 3 can move between the positioning plates 4 .

[0029] A cylinder is provided at the end of the support leg arm 2, and the support leg is connected to the support leg through the rotating shaft 10 in the cylinder 13. After the support leg contacts the ground, the rotation of the rotating shaft 10 ensures that the support leg 14 is in contact with the ground.

[0030] A U-shaped pull ring 12 is fixedly provided at the end of the pin shaft 5 , and the U-shaped pull ring 12 is welded to the end of the pin shaft 5 . After the latch 8 is pulled out, the pin shaft 5 is pulled out from the through hole 6 by pulling the pull ring 12 .

[0031] The installation process of the excavator leg structure is as follows:

[0032] When the support leg is retracted, the pin 5 is inserted into the through hole 6, and then the pin 8 is inserted into the insertion hole 7 to prevent the pin 5 from moving axially along the through hole 6. At this time, even if the arm falls off, the pin 5 can still support the support leg arm 2.

[0033] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. An excavator leg structure, characterized in that: It includes a mounting frame, a leg arm, an ear plate and a positioning plate. The leg arm is rotatably mounted on the bottom of the mounting frame, the ear plate is mounted on the upper side of the leg arm, a pair of positioning plates are mounted on the upper side of the mounting frame, the ear plate is movably arranged between the positioning plates, and a pin is set through the ear plate and the positioning plate.

2. The excavator leg structure according to claim 1, characterized in that: The positioning plate is provided with a plurality of through holes, and the ear plate is provided with a through hole.

3. The excavator leg structure according to claim 1, characterized in that: The pin shaft is provided with a socket, and the pin is movably arranged in the socket.

4. The excavator leg structure according to claim 1, characterized in that: The positioning plate is set to be trapezoidal, and a rounded corner is set on one side corner of the positioning plate close to the ear plate.

5. The excavator leg structure according to claim 1, characterized in that: The end of the ear plate is arranged in a semicircular shape.

6. The excavator leg structure according to claim 1, characterized in that: The mounting frame is hollow, and the support leg arm is movably arranged in the mounting frame.

7. The excavator leg structure according to claim 6, characterized in that: The spacing between the positioning plates is greater than the thickness of the ear plates.

8. The excavator leg structure according to claim 1, characterized in that: The ear plate is perpendicular to the upper side wall of the mounting frame, and the positioning plate is perpendicular to the upper side wall of the mounting frame.

9. The excavator leg structure according to claim 1, characterized in that: A rotating shaft is installed at the bottom of the support leg arm, and a circular hole is provided on the mounting frame corresponding to the rotating shaft. The rotating shaft is provided in the circular hole. A cylinder is provided at the end of the support leg arm, and the support leg is connected to the cylinder through the rotating shaft.

10. The excavator leg structure according to claim 1, characterized in that: A U-shaped pull ring is fixedly arranged at the end of the pin shaft.

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