Limiting mechanism for working device of loading machine

Abstract

The utility model relates to the field of engineering machinery, in particular to a limiting mechanism for a working device of a loading machine, which comprises a movable arm, a bucket arranged at the front part of the movable arm, a rocker arm used for controlling the bucket to turn over, a lug plate arranged at the rear part of the bucket and used for connecting the movable arm and the rocker arm, a limiting block arranged on the movable arm and arranged at the side part of the movable arm, and a limiting rod arranged on the limiting block, the limiting block is located at the lower limit position of the bucket in the bucket retracting state and abuts against the upper portion of the lug plate, and the limiting block is located at the upper limit position of the bucket in the discharging state and abuts against the rear portion of the lug plate. The working device of the loader is provided with the limiting mechanism. The limiting block abuts against different parts of the lug plate when the bucket is located at different limiting positions, through the design, limiting is more accurate, the stability of the device is enhanced, bucket collecting and discharging limiting can be achieved through one limiting block, and the early-stage manufacturing cost and the later-stage maintenance cost are reduced.

Description

Technical Field

[0001] The utility model relates to the field of engineering machinery, in particular to a limiting mechanism of a working device of a loader. Background Art

[0002] Loaders are engineering machinery widely used in earthwork construction. A bucket is provided on the front side of the loader. The bucket is connected to the loader through a boom and an arm. The bucket is driven by hydraulic oil circuit control to complete bucket collection and digging actions, thereby realizing various excavation operations.

[0003] The existing loader bucket collection and unloading limit mechanisms are limited separately. The limit mechanisms not only have many positions but also have low precision, which increases the manufacturing and maintenance costs and needs to be improved. Utility Model Content

[0004] The utility model aims to provide a limiting mechanism for a loader working device with reliable structure and high stability in view of the above problems.

[0005] To achieve the above-mentioned purpose, the utility model discloses a limit mechanism for a loader working device, which has the following structural features: it includes a boom, a bucket is provided at the front of the boom, and also includes a rocker arm for controlling the flipping of the bucket, an ear plate for connecting the boom and the rocker arm is installed at the rear of the bucket, a limit block is installed on the boom, the limit block is installed on the side of the boom, the limit block is located at the lower limit position when the bucket is in the retracted state, and it is at the position when it abuts against the upper part of the ear plate, and the limit block is located at the upper limit position when the bucket is in the unloading state, and it abuts against the rear part of the ear plate.

[0006] The limit block is installed on the side of the boom to control the lower limit position of the bucket in the bucket-retracting state and the upper limit position of the bucket in the unloading state. It can effectively prevent the bucket from over-turning during work and avoid possible damage and safety accidents. The limit block is against different parts of the ear plate when the bucket is in different limit positions. This design makes the limit more accurate and enhances the stability of the device, so that one limit block can limit the bucket retracting and unloading.

[0007] It also includes a quick-change bracket, which is installed at the front end of the boom and rocker arm, and the bucket is installed on the quick-change bracket. The quick-change bracket is installed at the front end of the boom and rocker arm, so that the bucket can be quickly and conveniently installed on the bracket, which improves the working efficiency of the loader, facilitates the replacement and maintenance of the bucket, and reduces the maintenance cost.

[0008] There are two lug plates, which are spaced apart from each other. This layout increases the stability of the structure and improves the stability of the bucket flipping.

[0009] There are two movable arms, which are located between two ear plates, so that the whole working device is evenly stressed and the wear of mechanical parts is reduced.

[0010] Limit blocks are installed on both booms, and the two limit blocks correspond to the two ear plates respectively, which can make the force on the bucket more balanced.

[0011] The limit block is a solid structure, which makes it more durable, able to withstand greater impact force and extend its service life.

[0012] The bucket cylinder installed on the boom is used to control the rotation of the rocker arm, so as to accurately control the flip angle and speed of the bucket. This makes the loader more flexible during operation and can cope with various complex working environments.

[0013] In summary, the beneficial effect of the utility model is that the limit block is installed on the side of the boom to control the lower limit position of the bucket in the bucket-retracting state and the upper limit position of the bucket in the unloading state. It can effectively prevent the bucket from overturning during work and avoid possible damage and safety accidents. The limit block is against different parts of the ear plate when the bucket is in different limit positions. This design makes the limit more accurate and enhances the stability of the device, so that one limit block can limit the bucket-retracting and unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram when the bucket is in the retracted state;

[0015] Figure 2 for Figure 1 A local enlarged structural diagram of point A in the middle;

[0016] Figure 3 It is a structural schematic diagram when the bucket is in the unloading state;

[0017] Figure 4 for Figure 3 A schematic diagram of the local enlarged structure of point B in the middle;

[0018] Figure 5 It is a schematic diagram of the changing structure of the bucket when it is in the state of retracting and unloading.

[0019] In the figure: bucket 1, boom 2, limit block 3, rocker arm 4, ear plate 5, quick-change bracket 6, bucket cylinder 7. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0025] A limit mechanism for a loader working device, the structural features of which are: comprising a boom 2, a bucket 1 is provided at the front of the boom 2, and also comprising a rocker arm 4 for controlling the overturning of the bucket 1, an ear plate 5 for connecting the boom 2 and the rocker arm 4 is installed at the rear of the bucket 1, a limit block 3 is installed on the boom 2, the limit block 3 is installed on the side of the boom 2, the limit block 3 is located at the upper limit position when the bucket 1 is in the retracted state, and it is at the position when it abuts against the lower part of the ear plate 5, and the limit block 3 is located at the upper limit position when the bucket 1 is in the unloading state, and it abuts against the rear part of the ear plate 5. Refer to the attached Figure 1 The limit block 3 is installed on the side of the boom 2 to control the lower limit position of the bucket 1 in the bucket-retracting state and the upper limit position in the unloading state. It can effectively prevent the bucket 1 from over-turning during work and avoid possible damage and safety accidents. The limit block 3 is against different parts of the ear plate 5 when the bucket 1 is in different limit positions. This design makes the limit more accurate and enhances the stability of the device, so that one limit block 3 can limit the bucket retracting and unloading.

[0026] See attached Figure 3, and also includes a quick-change bracket 6, which is mounted at the front end of the boom 2 and the rocker arm 4, and the bucket 1 is mounted on the quick-change bracket 6. The quick-change bracket 6 is mounted at the front end of the boom 2 and the rocker arm 4, so that the bucket 1 can be quickly and conveniently mounted on the bracket, thereby improving the working efficiency of the loader, facilitating the replacement and maintenance of the bucket 1, and reducing the maintenance cost.

[0027] See attached Figure 1 , two ear plates 5 are provided, and the two ear plates 5 are spaced left and right. This layout increases the stability of the structure and improves the stability of the bucket 1 flipping. For different types of ear plates 5, the length of the upper and rear parts of the ear plates 5 can be appropriately increased or reduced as needed, so that the ear plates 5 can correctly cooperate with the limit blocks 3. Two booms 2 are provided, and the two booms 2 are located between the two ear plates 5. The force of the entire working device is uniform, which reduces the wear of mechanical parts. The limit blocks 3 are installed on both booms 2, and the two limit blocks 3 correspond to the two ear plates 5 respectively, which can make the force of the bucket 1 more balanced. The limit block 3 is a solid structure. The limit block 3 is more durable and can withstand greater impact force, extending the service life. The boom 2 is equipped with a bucket cylinder 7 for controlling the rotation of the rocker arm 4. The bucket cylinder 7 installed on the boom 2 is used to control the rotation of the rocker arm 4, thereby accurately controlling the flipping angle and speed of the bucket 1. The loader is more flexible during work and can cope with various complex working environments.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A limiting mechanism for a loader working device, comprising a movable arm (2), a bucket (1) being provided at the front of the movable arm (2), and a rocker arm (4) for controlling the overturning of the bucket (1), and an ear plate (5) for connecting the movable arm (2) and the rocker arm (4) being installed at the rear of the bucket (1), characterized in that: A limit block (3) is installed on the boom (2), the limit block (3) being installed on the side of the boom (2), the limit block (3) being located at the lower limit position when the bucket (1) is in a retracted state, and being located at a position when the limit block (3) abuts against the upper part of the ear plate (5), and the limit block (3) being located at the upper limit position when the bucket (1) is in a discharging state, and being located at a position when the limit block (3) abuts against the rear part of the ear plate (5).

2. The loader working device limiting mechanism according to claim 1, characterized in that: It also includes a quick-change bracket (6), which is mounted on the front ends of the boom (2) and the rocker arm (4), and the bucket (1) is mounted on the quick-change bracket (6).

3. The loader working device limiting mechanism according to claim 1, characterized in that: The ear plates (5) are provided with two, and the two ear plates (5) are spaced apart from each other.

4. The loader working device limiting mechanism according to claim 3, characterized in that: The movable arms (2) are provided with two, and the two movable arms (2) are located between the two ear plates (5).

5. The limiting mechanism of the loader working device according to claim 4, characterized in that: Limit blocks (3) are installed on both movable arms (2), and the two limit blocks (3) correspond to the two ear plates (5) respectively.

6. The limiting mechanism of the loader working device according to claim 3, characterized in that: The limit block (3) is a solid structure.

7. The limiting mechanism of the loader working device according to claim 1, characterized in that: The movable arm (2) is provided with a bucket oil cylinder (7) for controlling the rotation of the rocker arm (4).

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