CN202391131U - Boom connection structure, boom and construction machinery - Google Patents

Abstract

The utility model discloses an arm support connection structure, wherein, this arm support connection structure include first arm (1), second arm (2), pneumatic cylinder, articulate in two first connecting rod (3) of straight type in two outsides of first arm with articulate in two second connecting rod (4) of straight type in two outsides of second arm, it is articulated with the first connecting rod of one side and second connecting rod to be located, the one end of pneumatic cylinder with first arm is connected, and the other end is in first connecting rod with the articulated department of second connecting rod with first connecting rod with the second connecting rod is articulated. The utility model also provides an arm support and engineering machine tool. The utility model discloses can adopt two straight type connecting rods to form four-bar linkage, it is less to arrange the required space of straight type connecting rod, and is convenient for fold the less state in surplus space with the cantilever crane.

Description

Boom connection structure, boom and construction machinery

technical field

The utility model relates to an extendable arm frame, in particular to an arm frame connecting structure, an arm frame including the arm frame connecting structure and engineering machinery.

Background technique

Many construction machinery, such as concrete pump trucks, fire trucks, and spreaders, are equipped with booms, which usually include multi-section arms and can be expanded and retracted. Taking a concrete pump truck as an example, the connection structure of its two adjacent arms is shown in Figure 1. Two tension links are hinged on both sides of the first arm 1, and two tension links are hinged on both sides of the second arm 2. The pressure-bearing connecting rod, the tension-bearing connecting rod and the pressure-bearing connecting rod on the same side are hinged, one end of the hydraulic cylinder (such as the cylinder barrel 5) is connected to the first arm, and the other end (such as the piston rod 6) is connected to the tension-bearing connecting rod and the pressure-bearing connecting rod. /or a pressure-bearing link hinge. Thus, the tension link, the pressure link, the first arm 1 and the second arm 2 form a four-bar linkage movement mechanism.

Specifically, one of the tension link and the pressure link may be a straight link A, and the other may be a triangular link B. In the embodiment shown in FIG. 1 , the tensile connecting rod is a triangular connecting rod B, the pressure receiving connecting rod is a straight connecting rod A, and the other end of the hydraulic cylinder is hinged to the triangular connecting rod B. In order to strengthen the stability of the four-bar linkage mechanism, a connecting sleeve 8 can be arranged between the two pressure-bearing straight connecting rods A, so that the stability of the straight connecting rod A can be maintained through the connecting sleeve 8, preventing straight Type connecting rod A loses stability during use. However, the above-mentioned arrangement with the triangular connecting rod B is only suitable for a larger space, and the space occupied by the multi-section arms and the remaining space S between the two folded arms are relatively large, as shown in Figure 2. It cannot meet the requirements of arranging the triangular connecting rod B in a limited space and reducing the remaining space.

Utility model content

The purpose of this utility model is to provide a boom connection structure using a four-bar linkage mechanism with straight links to meet the above space requirements.

In order to achieve the above object, the utility model provides a boom connection structure, wherein the boom connection structure includes a first arm, a second arm, a hydraulic cylinder, and two straight arms hinged on the two outer sides of the first arm. The first connecting rod and two straight second connecting rods hinged on the two outer sides of the second arm, the first connecting rod and the second connecting rod on the same side are hinged, one end of the hydraulic cylinder is connected to the The first arm is connected, and the other end is hinged with the first connecting rod and the second connecting rod at the hinge of the first connecting rod and the second connecting rod.

Preferably, a second connecting portion is provided between the two second connecting rods.

Preferably, a first connecting portion is provided between the two first connecting rods.

Preferably, the first connecting portion is integrally formed with the two first connecting rods, and the second connecting portion is integrally formed with the two second connecting rods.

Preferably, the first connection part and the second connection part are plate-like structures.

Preferably, the first connecting portion and/or the second connecting portion has a lightening hole.

Preferably, the hydraulic cylinder includes a cylinder and a piston rod, the cylinder is connected to the first arm, and the piston rod is hinged to the first connecting rod and the second connecting rod.

Preferably, the hydraulic cylinder includes a connecting part connected to the end of the piston rod and is hinged to the first connecting rod and the second connecting rod through the connecting part.

The utility model also provides a boom, wherein the boom includes the boom connection structure of the utility model.

The utility model also provides a construction machine, wherein, the construction machine includes the boom of the utility model.

Through the above technical solution, two straight connecting rods are used to form a four-bar linkage mechanism. The space required for arranging the straight connecting rods is small, and the straight connecting rods are arranged on the outside without interfering with the folding, which is beneficial to the boom Folds to a state with less remaining space.

Other features and advantages of the present utility model will be described in detail in the following specific embodiments.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, together with the following specific embodiments, are used to explain the utility model, but do not constitute a limitation to the utility model. In the attached picture:

Fig. 1 is a perspective view illustrating an existing jib connection structure;

Fig. 2 is a schematic diagram illustrating the state when the two arms of Fig. 1 are retracted;

Fig. 3 is a perspective view illustrating an embodiment of the boom connection structure of the present invention;

Fig. 4 is the front view of Fig. 3;

Fig. 5 is a schematic diagram illustrating the state when the two arms in Fig. 3 are retracted;

Fig. 6 is a front view illustrating an embodiment of a connection portion of the present invention.

Explanation of reference signs

1: The first arm 2: The second arm 3: The first connecting rod 3a: The first connecting part

4: Second connecting rod 4a: Second connecting part 5: Cylinder 6: Piston rod

7: Connecting parts 8: Connecting bushing A: Straight connecting rod B: Triangular connecting rod

S: remaining space

Detailed ways

The specific embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the utility model, and are not intended to limit the utility model.

In the present utility model, in the case of no contrary description, the used orientation words such as "up, down, left and right" usually refer to the up, down, left and right shown in the accompanying drawings; "Refers to the inside and outside of the outline of each part itself.

According to one aspect of the present invention, there is provided a jib connection structure, which comprises a first arm 1, a second arm 2, a hydraulic cylinder, and two straight arms hinged on the two outer sides of the first arm 1. A first connecting rod 3 of the type and two straight second connecting rods 4 hinged on the two outer sides of the second arm 2, the first connecting rod 3 and the second connecting rod 4 on the same side are hinged, the One end of the hydraulic cylinder is connected to the first arm 1, and the other end is connected to the first connecting rod 3 and the second connecting rod 4 at the hinge of the first connecting rod 3 and the second connecting rod 4. hinged.

As shown in FIG. 3 and FIG. 4 , a four-bar linkage mechanism can be formed by using two straight connecting rods (ie, the first connecting rod 3 and the second connecting rod 4 ). In addition, the space required for arranging the straight connecting rod is small, and the first connecting rod 3 and the second connecting rod 4 are respectively arranged on the outside of the first arm 1 and the second arm 2, which will not interfere with the folding of the arm frame, thereby It is beneficial to fold the boom to a state where the remaining space S is small, as shown in FIG. 5 .

Wherein, the first connecting rod 3 is a tension-bearing connecting rod, and the second connecting rod 4 is mainly a pressure-bearing connecting rod. Therefore, a second connecting portion 4a can be arranged between the two second connecting rods 4 to strengthen the second connecting rod. The second connecting rod 4 prevents the second connecting rod 4 from losing stability. Preferably, a first connecting portion 3a may be provided between the two first connecting rods 3 to strengthen the first connecting rod 3 and prevent the first connecting rod 3 from being unstable.

The two first connecting rods 3 can be reinforced by the first connecting portion 3a, and the two second connecting rods 4 can be reinforced by the second connecting portion 4a, so that a stable four-bar linkage mechanism can be obtained.

Wherein, both the first connecting part 3a and the second connecting part 4a are used to enhance the stability rather than the strength, as long as they respectively play the role of the stability of connecting the two first connecting rods 3 and the two second connecting rods 4 Therefore, the first connection part 3a and the second connection part 4a may be formed in various appropriate shapes or structures. In order to save space and simplify the structure, the first connection part 3a and the second connection part 4a may be plate-shaped structures.

As mentioned above, both the first connecting portion 3a and the second connecting portion 4a are used to enhance stability rather than strength, therefore, it is more preferable to make the first connecting portion 3a and the second connecting portion 4a respectively form weight-reducing structure. In a preferred embodiment of the present invention, as shown in FIG. 6 , there may be a lightening hole P on the first connecting portion 3a and/or the second connecting portion 4a.

Wherein, the first connecting portion 3a can be arranged between the two first connecting rods 3 in various appropriate ways, and similarly, the second connecting portion 4a can also be arranged between the two second connecting rods in various appropriate ways. between 4. Preferably, the first connecting part 3 a can be fixed between two first connecting rods 3 , and the second connecting part 4 a can be fixed between two second connecting rods 4 . More preferably, the first connecting portion 3a can be integrally formed with the two first connecting rods 3 (that is, form an integral piece), and the second connecting portion 4a can be formed integrally with the two second connecting rods. 4 integrally formed.

It should be noted that the first connecting part 3a and the second connecting part 4a can be positioned according to the actual situation, so that the first connecting part 3a and the second connecting part 4a will not interfere during the movement of the four-bar linkage mechanism.

In addition, the hydraulic cylinder includes a cylinder 5 and a piston rod 6, the cylinder 5 can be connected with the first arm 1, and the piston rod 6 can be connected with the first connecting rod 3 and the first arm 1. Two connecting rods 4 are hinged.

In order to make the hydraulic cylinder articulated with the first connecting rod 3 and the second connecting rod 4, preferably, as shown in Figures 3 and 4, the hydraulic cylinder includes a connecting part 7 connected to the end of the piston rod 6 and The connecting member 7 is hinged to the first connecting rod 3 and the second connecting rod 4 .

According to another aspect of the present invention, a boom is provided, wherein the boom includes the boom connection structure of the present invention. Specifically, the connection structure between two multi-section arms that need to be deployed can adopt the boom connection structure of the present invention, so as to obtain a four-bar linkage mechanism and enable the boom to be folded to a state where the remaining space S is small.

According to another aspect of the present utility model, a construction machine is provided, wherein the construction machine includes the boom of the present utility model, so that two pairs of expandable multi-section arms of the boom form a four-bar linkage mechanism and The boom can be folded to a state where the remaining space S is small. Wherein, the utility model may relate to various engineering machinery with a boom with expandable multi-section arms, such as a concrete pump truck.

The preferred embodiment of the utility model has been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the specific details of the above-mentioned embodiment, and within the scope of the technical concept of the utility model, the technical solution of the utility model can be carried out in many ways. These simple modifications all belong to the protection scope of the present utility model.

In addition, it should be noted that the various specific technical features described in the above specific implementation manners may be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, the utility model will not further describe various possible combinations.

In addition, any combination of various implementations of the present invention can also be made, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (10)

1. jib syndeton; It is characterized in that; This jib syndeton comprises the first arm (1), second arm (2), hydraulic cylinder, be articulated in said the first arm (1) two outsides two straight types first connecting rod (3) and be articulated in the second connecting rod (4) of two straight types in two outsides of said second arm (2); The first connecting rod (3) and the second connecting rod (4) that are positioned at the same side are hinged; One end of said hydraulic cylinder is connected with said the first arm (1), and the other end is hinged at the hinged place of said first connecting rod (3) and said second connecting rod (4) and said first connecting rod (3) and said second connecting rod (4).

2. jib syndeton according to claim 1 is characterized in that, is provided with second connecting portion (4a) between said two second connecting rods (4).

3. jib syndeton according to claim 2 is characterized in that, is provided with first connecting portion (3a) between said two first connecting rods (3).

4. jib syndeton according to claim 3 is characterized in that, said first connecting portion (3a) is integrally formed with said two first connecting rods (3), and said second connecting portion (4a) is integrally formed with said two second connecting rods (4).

5. jib syndeton according to claim 3 is characterized in that, said first connecting portion (3a) and said second connecting portion (4a) are platy structure.

6. according to any described jib syndeton among the claim 3-5, it is characterized in that said first connecting portion (3a) and/or said second connecting portion (4a) have lightening hole (P).

7. jib syndeton according to claim 3; It is characterized in that; Said hydraulic cylinder comprises cylinder barrel (5) and piston rod (6), and said cylinder barrel (5) is connected with said the first arm (1), and said piston rod (6) is hinged with said first connecting rod (3) and said second connecting rod (4).

8. jib syndeton according to claim 7; It is characterized in that said hydraulic cylinder comprises the link (7) that is connected in said piston rod (6) end and pass through said link (7) hinged with said first connecting rod (3) and said second connecting rod (4).

9. a jib is characterized in that, said jib comprises according to any described jib syndeton among the claim 1-8.

10. an engineering machinery is characterized in that, said engineering machinery comprises jib according to claim 9.

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