Protective mechanism for pin hole of landing leg for crane

Abstract

The utility model discloses a protection mechanism for a pin hole of a landing leg for a crane, which comprises a fixed leg rear vertical plate, a pin hole formed in the surface of the fixed leg rear vertical plate and used for inserting a landing leg full-extension pin shaft or a landing leg half-extension pin shaft, and a pin hole protection plate arranged in parallel with the fixed leg rear vertical plate, one corner of the pin hole protection plate is rotationally connected with the fixed leg rear vertical plate; in a normal state, the pin hole protection plate can shield the pin hole so as to prevent muddy water impurities from being deposited near the supporting leg pin shaft and the pin hole, the pin hole protection plate can be fixed at different positions only by inserting the limiting pin shaft into the corresponding fixing shaft sleeve, and the two states of shielding the pin hole and releasing the pin hole are achieved; therefore, the protection effect on the pin hole of the landing leg for the crane in a narrow space is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a protection mechanism for a pin hole of a crane outrigger. Background Art

[0002] The crane is composed of chassis, working outriggers, slewing bearings, turntables, booms and other components, and the working outriggers are divided into fixed outriggers and movable outriggers. The fixed outriggers are welded to the main frame as an integrated structure, while the movable outriggers need to be pushed and pulled by horizontal cylinders to perform horizontal telescopic movements in the fixed outrigger box. During the operation of the crane, a certain proportion of lateral span is usually designed to increase the stability of the chassis; therefore, after the movable outriggers are pushed into place by the horizontal cylinders, a pin shaft must be set between the movable outriggers and the fixed outriggers for mechanical limiting to prevent the movable outriggers from suddenly retracting during the operation and causing safety accidents.

[0003] However, since the working environment of cranes is usually construction sites or mines, the environment is usually harsh. When the crane is driving to the working scene, the outrigger pins and outrigger pin holes used for fixing are often covered with mud and dirt by the tires, which in turn causes mud and water and other impurities to accumulate near the movable outrigger pin shaft and the pin hole, further making the process of inserting the pin shaft difficult, affecting the user experience.

[0004] At the same time, since the tires are arranged close to the outriggers, the problem of tire mud throwing is more serious, which increases the difficulty of spatial arrangement of the protective mechanism.

[0005] Therefore, the prior art urgently needs a structure that can place and protect the outrigger pin in a small space, to ensure that the outrigger pin hole and the outrigger pin are in a protected state in any state of the vehicle, thereby improving the user experience comfort. Summary of the invention

[0006] In view of the above technical problems, the utility model provides a protective mechanism for the pin holes of crane outriggers, which completes the protection of the pin holes in a narrow space by setting a pin hole protection plate that rotates parallel to the rear vertical plate of the fixed leg; therefore, the user only needs to insert the limit pin shaft into the corresponding fixed shaft sleeve, and the pin hole protection plate will be fixed in different positions, realizing two states of covering the pin hole and releasing the pin hole; thereby, the protective effect of the pin holes of crane outriggers in a narrow space is effectively improved.

[0007] In order to achieve the above technical purpose, the utility model adopts the following technical means:

[0008] A protection mechanism for a pin hole of a crane outrigger includes a fixed leg rear stand plate, a surface of which is provided with a pin hole for inserting a fully extended pin shaft of the outrigger or a half-extended pin shaft of the outrigger, and further includes:

[0009] A pin hole protection plate is arranged in parallel with the rear vertical plate of the fixed leg, and one corner of the pin hole protection plate is rotatably connected to the rear vertical plate of the fixed leg; under normal conditions, the pin hole protection plate can shield the pin hole to prevent mud and water impurities from being deposited near the support leg pin shaft and the pin hole.

[0010] The pin hole protection plate is provided with two limiting holes, and the limiting pin shaft passes through different limiting holes, so that the pin hole protection plate is fixed at different overlapping positions, thereby realizing the switching between the covering and uncovering states of the pin hole.

[0011] The pin hole protection plate is rotatably connected to the fixed leg rear upright plate via a rotating shaft sleeve.

[0012] A strip-shaped mounting base plate is fixed to one side of the rear vertical plate of the fixed leg through a heightening stud;

[0013] The mounting base plate is horizontally arranged, one end of which is fixedly connected to the rotating shaft sleeve, and the other end is slidably connected to the limiting pin shaft, so that the pin hole protection plate and the rear upright plate of the fixed leg have rotation space.

[0014] The height of the heightened stud is between 50 mm and 100 mm.

[0015] A bolt is arranged through the rotating sleeve, and the bolt is threadedly connected with a threaded hole arranged on the rear vertical plate of the fixed leg, so as to realize the free rotation of the pin hole protection plate around the central axis of the bolt.

[0016] A gasket for axial limiting is arranged between the bolt and the rotating sleeve.

[0017] The lower edge and both sides of the pin hole protection plate are arranged as flange structures.

[0018] A clamping pin with an R-shaped structure is inserted into the free end of the limiting pin shaft.

[0019] Beneficial effects:

[0020] The utility model completes the protection of the pin holes in a narrow space by arranging a pin hole protection plate which rotates parallel to the rear upright plate of the fixed leg. Therefore, the user only needs to insert the limit pin shaft into the corresponding fixed shaft sleeve, and the pin hole protection plate will be fixed in different positions, realizing two states of covering the pin holes and releasing the pin holes. Thereby, the protection effect of the pin holes of the crane outriggers in a narrow space is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the protection mechanism of the utility model;

[0022] Figure 2 for Figure 1Cross-sectional view of the CC section;

[0023] Figure 3 It is a side view of the protection mechanism of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the protective mechanism of the utility model when the pin hole protective plate is opened.

[0025] In the figure: 1. Full extension pin of the outrigger; 2. Half extension pin of the outrigger; 3. Pin placement protection plate; 4. Pin hole protection plate; 41. Fixed bushing; 5. Fixed leg rear vertical plate; 51. Heightening stud; 52. Installing base plate; 6. Rotating bushing; 7. Gasket; 8. Bolt; 9. Limit pin; 10. Pin. DETAILED DESCRIPTION

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] The structural schematic diagram of the utility model ice making device is as follows Figure 1-4 shown.

[0028] A protection mechanism for a pin hole of a crane outrigger comprises a rear stand plate of a fixed leg, a surface of which is provided with a pin hole for inserting a fully extended pin shaft of the outrigger or a half-extended pin shaft of the outrigger; and further comprises:

[0029] The pin hole protection plate is arranged in parallel with the rear vertical plate of the fixed leg, and one corner of the pin hole protection plate is rotatably connected to the rear vertical plate of the fixed leg; under normal conditions, the pin hole protection plate can cover the pin hole to prevent mud and water impurities from being deposited near the support leg pin shaft and the pin hole.

[0030] Two limit holes are arranged on the pin hole protection plate. By passing the limit pin shaft through different limit holes, the pin hole protection plate is fixed at different overlapping positions, so as to realize the switching between the covering and uncovering states of the pin hole.

[0031] Among them, the two limiting holes are at an angle of 90 degrees and are respectively arranged in the horizontal and vertical directions of the rotating sleeve; thereby, it can be ensured that the pin hole protection plate is fixed in the horizontal position and the vertical position respectively.

[0032] Specifically, if Figure 1 As shown, when the vehicle is in a non-lifting operation state, the fully extended pin shaft of the outrigger and the half-extended pin shaft of the outrigger are placed inside the pin shaft placement protection plate; at this time, the pin hole protection plate is in a vertical state, thereby protecting the pin hole outside the tire; Figure 2 As shown, when the vehicle is in the lifting operation state, the pin hole protection plate is in a horizontal state, exposing the pin hole within the field of vision; then, it is convenient for personnel to install the pin shaft and complete the mechanical limit of the relevant movable legs.

[0033] A long strip of mounting base plate is fixed to one side of the fixed leg rear vertical plate through a heightening stud; specifically, the heightening stud and the mounting base plate are welded to the fixed leg rear vertical plate; wherein, the function of the heightening stud is to increase the gap between the pin hole protection plate and the fixed leg rear vertical plate to facilitate the free rotation of the protective cover.

[0034] At this time, the pin hole protection plate and the rear upright plate of the fixed leg are rotatably connected through a rotating shaft sleeve.

[0035] A long strip-shaped mounting base plate is fixed to one side of the rear vertical plate of the fixed leg through a heightening stud; the mounting base plate is arranged horizontally, one end of which is fixedly connected to the rotating shaft sleeve, and the other end is slidably connected to the limit pin shaft, so that there is rotation space between the pin hole protection plate and the rear vertical plate of the fixed leg.

[0036] The height of the heightening stud is between 50mm and 100mm.

[0037] A bolt is provided through the rotating sleeve, and the bolt is threadedly connected with a threaded hole provided on the rear vertical plate of the fixed leg, so as to realize the free rotation of the pin hole protection plate around its own central axis; thereby, the pin hole protection plate is fixed to the rear vertical plate of the fixed leg of the frame through the rotating sleeve, the gasket and the bolt, and can freely rotate around the rotating sleeve. Among them, the function of the gasket is to realize the axial limit between the bolt and the rotating sleeve.

[0038] In order to increase the protective effect of the pin hole protection plate and prevent mud and dirt from attacking from the side or bottom, the lower edge and both sides of the pin hole protection plate are set as a flange structure.

[0039] An R-shaped pin is inserted into the free end of the limit pin, so that the limit pin can fix the pin hole protection plate on the rear vertical plate of the fixed leg and fix it through the R-shaped pin to prevent the limit pin from slipping off the mounting base and the pin hole protection plate when the vehicle is in a bumpy state.

[0040] The leg pin placement cover plate can be designed to be tilted according to user habits, and pin fixing mechanisms with different hole diameters are added to the inner side of the cover plate to prevent the wrong pin specifications from being placed.

[0041] The heightened studs can be replaced with a cross plate welded or assembled on the rear uprights of the frame fixed legs to provide better protection from splashes from directly above.

[0042] It needs to be further explained that the fixed sleeve can be fixed on the pin hole protection plate by welding, and the heightening stud and the mounting base plate can be fixed on the rear vertical plate of the fixed leg by welding.

[0043] Working principle:

[0044] When the vehicle is not in the lifting operation state, that is, when the crane is traveling, the user places the fully extended outrigger pin and the semi-extended outrigger pin inside the pin placement protection plate. At this time, the pin hole protection plate is in a vertical state, thereby protecting the pin hole outside the tire.

[0045] When the vehicle is in the lifting operation state, that is, the crane is working; the user first pulls out the clamping pin from the limit pin shaft, and then pulls out the limit pin shaft from the pin hole protection plate and the mounting base plate; at this time, adjust the angle of the pin hole protection plate to make it in a horizontal state, exposing the pin hole within the field of vision; thereby, it is convenient for personnel to install the pin shaft and complete the mechanical limiting of the relevant movable legs; finally, insert the limit pin shaft into the corresponding other fixed shaft sleeves, and insert the clamping pin back into the limit pin shaft to complete the fixation of the pin hole protection plate after the rotation angle.

Claims

1. A protection mechanism for a pin hole of a crane leg, comprising a fixed leg rear stand plate, a surface of which is provided with a pin hole for inserting a fully extended leg pin shaft or a semi-extended leg pin shaft, characterized in that: Also includes: A pin hole protection plate is arranged in parallel with the rear upright plate of the fixed leg, and one corner of the pin hole protection plate is rotatably connected to the rear upright plate of the fixed leg; Under normal conditions, the pin hole protection plate can shield the pin hole to prevent mud and water impurities from being deposited near the leg pin shaft and the pin hole.

2. The protection mechanism for the pin hole of the crane leg according to claim 1 is characterized in that: The pin hole protection plate is provided with two limiting holes, and the limiting pin shaft passes through different limiting holes to realize switching between the shielding and uncovering states of the pin hole.

3. The protection mechanism for the pin hole of the crane leg according to claim 2, characterized in that: The pin hole protection plate is rotatably connected to the fixed leg rear upright plate via a rotating shaft sleeve.

4. The protection mechanism for the pin hole of the crane leg according to claim 3 is characterized in that: A strip-shaped mounting base plate is fixed to one side of the rear vertical plate of the fixed leg through a heightening stud; The mounting base plate is horizontally arranged, one end of which is fixedly connected to the rotating shaft sleeve, and the other end is slidably connected to the limiting pin shaft, so that the pin hole protection plate can be rotated within a 90-degree range of the parallel space of the rear upright plate of the fixed leg.

5. The protection mechanism for the pin hole of the crane leg according to claim 4, characterized in that: The height of the heightened stud is between 50 mm and 100 mm.

6. The protection mechanism for the pin hole of the crane leg according to claim 3, characterized in that: A bolt is arranged through the rotating sleeve, and the bolt is threadedly connected with a threaded hole arranged on the rear vertical plate of the fixed leg, so as to realize the free rotation of the pin hole protection plate around the central axis of the bolt.

7. The protection mechanism for the pin hole of the crane leg according to claim 6, characterized in that: A gasket for axial limiting is arranged between the bolt and the rotating sleeve.

8. The protection mechanism for the pin hole of a crane leg according to claim 2, characterized in that: The lower edge and both sides of the pin hole protection plate are arranged as flange structures to increase the protection area.

9. The protection mechanism for the pin hole of a crane leg according to claim 2, characterized in that: A clamping pin with an R-shaped structure is inserted into the free end of the limiting pin shaft.

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