Connecting rod for working device, working device and excavating equipment

Abstract

The utility model discloses a connecting rod used for a working device, the working device and excavating equipment, and the connecting rod comprises a first connecting part, a second connecting part, a third connecting part and a fourth connecting part, the second connecting part and the first connecting part are integrally cast and formed, the second connecting part comprises a first connecting plate body and a second connecting plate body which are distributed in parallel at intervals in the axial direction of the first connecting part, and the first ends of the first connecting plate body and the second connecting plate body are both connected with the first connecting part; and the second end of the first connecting plate body and the second end of the second connecting plate body act together to be connected with a bucket driving piece of the working device. The connecting rod for the working device has the advantages of simple structure, more uniform stress and high reliability.

Description

Technical Field

[0001] The present application belongs to the technical field of engineering machinery, and specifically relates to a connecting rod for a working device, a working device and an excavating device. Background Art

[0002] Traditional excavators have a small working force of the working device, so the bucket cylinder mostly uses one cylinder, and the corresponding connecting rod is also one. Among them, the connecting rod is one of the main components of the connecting mechanism of the front working device of the excavator. It is used to connect the bucket and the bucket cylinder, and together with the rocker arm, it forms a four-bar mechanism to complete the bucket movement and the transmission of the bucket cylinder force.

[0003] In the prior art, connecting rods are mostly formed by welding steel pipes and plates. The welds are numerous and complex. Some of the welds are difficult to operate and the welding quality is difficult to ensure. The following disadvantages also occur: (1) The mechanical properties of the steel in the heat-affected zone of the weld change, and the material becomes brittle; (2) Welding will produce residual stress and residual deformation; (3) When the welding is poor or the weld is not properly processed, cracking failures are likely to occur; (4) The materials used for the connecting rod are conventional Q355 (plate) and 35# (steel pipe), which results in the strength of the connecting rod being limited to a certain extent by the material. Utility Model Content

[0004] The purpose of the present application is to provide a connecting rod for a working device, a working device and an excavating equipment, wherein the connecting rod for the working device has the advantages of simple structure, more uniform force and high reliability.

[0005] In order to achieve the above-mentioned object, the first aspect of the present application provides a connecting rod for a working device, the connecting rod comprising:

[0006] A first connecting portion, which is cylindrical and is used to connect to the bucket of the working device;

[0007] The second connecting part is integrally cast with the first connecting part and includes a first connecting plate body and a second connecting plate body that are spaced apart and parallel to the axial direction of the first connecting part. The first ends of the first connecting plate body and the second connecting plate body are respectively connected to the first connecting part, and the second ends of the first connecting plate body and the second connecting plate body work together to connect the bucket driving part of the working device.

[0008] In an embodiment of the utility model, the first connecting plate body includes a first side plate section and a first cylindrical section, and two ends of the first side plate section are respectively connected to the first connecting portion and the first cylindrical section;

[0009] The second connecting plate body comprises a second side plate section and a second cylindrical section, and two ends of the second side plate section are respectively connected to the first connecting portion and the second cylindrical section;

[0010] The first cylindrical section and the second cylindrical section are connected to the bucket driving member via a connecting shaft.

[0011] In an embodiment of the utility model, in the width direction of the connecting rod, the two opposite side walls of the first side plate section are respectively the first side wall and the second side wall, and the first thickened portion is formed at the connection between the first side wall, the second side wall and the outer peripheral wall of the first connecting part; the two opposite side walls of the second side plate section are respectively the third side wall and the fourth side wall, and the second thickened portion is formed at the connection between the third side wall, the fourth side wall and the outer peripheral wall of the first connecting part.

[0012] In an embodiment of the present invention, the second connecting portion further comprises a third connecting plate body arranged along the horizontal direction, and in the width direction of the third connecting plate body, two sides of the third connecting plate body are respectively connected to the first side plate segment and the second side plate segment.

[0013] In an embodiment of the utility model, one end of the third connecting plate body in the length direction is connected to the first connecting portion, and the connections between the top wall of the third connecting plate body, the bottom wall of the third connecting plate body and the outer peripheral wall of the first connecting portion are all formed as smooth arc transitions.

[0014] In an embodiment of the present invention, a hollow portion is formed on the third connecting plate body.

[0015] In an embodiment of the utility model, the second connecting part also includes a rib plate body arranged at one end of the third connecting plate body away from the first connecting part and distributed vertically, and in the width direction of the third connecting plate body, the two ends of the rib plate body are respectively connected to the first side plate segment and the second side plate segment.

[0016] In an embodiment of the utility model, the connection between the side wall of the first side panel segment, the side wall of the second side panel segment and the first side wall of the rib plate body is formed as a smooth arc transition, and the connection between the side wall of the first side panel segment, the side wall of the second side panel segment and the second side wall of the rib plate body is formed as a smooth arc transition, wherein in the length direction of the connecting rod, the first side wall of the rib plate body and the second side wall of the rib plate body are opposite.

[0017] A second aspect of the present application provides a working device, which includes the above-mentioned connecting rod for the working device.

[0018] A third aspect of the present application provides an excavation device, which includes the above-mentioned working device.

[0019] It can be seen from the above technical solution that the first connecting part is cylindrical and is used to connect with the bucket of the working device; the second connecting part is integrally cast with the first connecting part and includes a first connecting plate body and a second connecting plate body distributed in parallel and spaced relationship along the axial direction of the first connecting part, and the first connecting plate body and the second connecting plate body each work together at one end away from the first connecting part to connect the bucket driving member of the working device. Since the first connecting part and the second connecting part are integrally cast, the connecting rod has a higher strength than the connecting rod in the prior art and can avoid the occurrence of weld cracking. The connecting rod also has the advantages of simple structure, stable and reliable in use, and not easy to deform.

[0020] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0022] Figure 1 Schematic diagram of the structure of the connecting rod in this embodiment;

[0023] Figure 2 : is the stress cloud diagram of the connecting rod in the force analysis software in this embodiment.

[0024] Description of Reference Numerals

[0025] 1-first connecting part; 2-second connecting part; 201-first connecting plate body; 2011-first side plate section; 2012-first cylindrical section; 2013-first thickened portion; 202-second connecting plate body; 2021-second side plate section; 2022-second cylindrical section; 2023-second thickened portion; 203-third connecting plate body; 2031-hollow portion; 204-rib plate body. DETAILED DESCRIPTION

[0026] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0027] In the embodiment of the present application, a new type of connecting rod for a working device is provided, such as Figure 1 As shown, the connecting rod includes:

[0028] The first connecting part 1 is cylindrical and is used to connect with the bucket of the working device;

[0029] The second connecting part 2 is integrally cast with the first connecting part 1 and includes a first connecting plate body 201 and a second connecting plate body 202 that are distributed parallel to and spaced apart from each other along the axial direction of the first connecting part 1. The first ends of the first connecting plate body 201 and the second connecting plate body 202 are respectively connected to the first connecting part 1, and the second ends of the first connecting plate body 201 and the second ends of the second connecting plate body 202 work together to connect the bucket driving part of the working device.

[0030] The working device in this embodiment is suitable for excavation equipment (such as an excavator), and the working device includes a bucket and a bucket driving member (such as a bucket cylinder). The first connecting part 1 is formed with a first connecting hole that penetrates axially, and the bucket is connected to the first connecting part 1 through a first connecting shaft that penetrates the first connecting hole; the first connecting plate body 201 and the second connecting plate body 202 are respectively formed with a second connecting hole and a third connecting hole at one end away from the first connecting part 1, and the bucket driving member is connected to the first connecting plate body 201 and the second connecting plate body 202 through a second connecting shaft that penetrates the second connecting hole and the third connecting hole at the same time. Specifically, the bucket driving member is sleeved on the second connecting shaft and is located between the first connecting plate body 201 and the second connecting plate body 202. Since the first connecting part 1 and the second connecting part 2 are integrally cast, the connecting rod in this embodiment has a higher strength than the connecting rod in the prior art and can avoid the occurrence of weld cracking. In addition, the connecting rod in this embodiment also has the advantages of simple structure, stable and reliable in use, and not easy to deform.

[0031] Furthermore, the working device in this embodiment also includes a first rocker arm and a second rocker arm, the axial ends of the second connecting shaft protrude from the first connecting plate body 201 and the second connecting plate body 202 respectively, the first rocker arm is sleeved on the second connecting shaft and is located at the end of the second connecting shaft away from the second connecting plate body 202, the second rocker arm is sleeved on the second connecting shaft and is located at the end of the second connecting shaft away from the first connecting plate body 201, and the connecting rod and the bucket, the bucket driving component, the first rocker arm, and the second rocker arm together form a connecting rod mechanism to complete the bucket movement and the transmission of force between the bucket driving components.

[0032] Furthermore, the connecting rod in this embodiment is subjected to a quenching and tempering treatment after casting, thereby improving the strength and fatigue reliability of the connecting rod.

[0033] In one embodiment of the present utility model, the first connecting plate body 201 includes a first side plate segment 2011 and a first cylindrical segment 2012, and two ends of the first side plate segment 2011 are respectively connected to the first connecting portion 1 and the first cylindrical segment 2012;

[0034] The second connecting plate body 202 includes a second side plate segment 2021 and a second cylindrical segment 2022, and two ends of the second side plate segment 2021 are connected to the first connecting portion 1 and the second cylindrical segment 2022 respectively;

[0035] The first cylindrical section 2012 and the second cylindrical section 2022 are connected to the bucket driving member via a connecting shaft.

[0036] Specifically, the second connecting hole is formed on the first cylindrical segment 2012, the third connecting hole is formed on the second cylindrical segment 2022, and the connecting shaft (the connecting shaft here is the second connecting shaft) passes through the first cylindrical segment 2012 and the second cylindrical segment 2022 at the same time. The above structural arrangement makes the connecting rod in this embodiment symmetrically distributed in the width direction, and the structure is simple, which is convenient for production and manufacturing.

[0037] In one embodiment of the utility model, in the width direction of the connecting rod, the two opposite side walls of the first side plate section 2011 are respectively the first side wall and the second side wall, and the first thickened portion 2013 is formed at the connection between the first side wall, the second side wall and the outer peripheral wall of the first connecting portion 1; similarly, the two opposite side walls of the second side plate section 2021 are respectively the third side wall and the fourth side wall, and the second thickened portion 2023 is formed at the connection between the third side wall, the fourth side wall and the outer peripheral wall of the first connecting portion 1. Since the first connecting portion 1 is connected to the bucket, and the bucket is subjected to increased force during operation, the above situation will cause the first connecting portion 1 and the positions where the first side plate section 2011 and the second side plate section 2021 are connected to the first connecting portion 1 to be subjected to greater force, and the provision of the two first thickened portions 2013 and the two second thickened portions 2023 in this embodiment is conducive to further strengthening the structural strength between the first connecting portion 1 and the second connecting portion 2, thereby facilitating the extension of the reliability and service life of the connecting rod.

[0038] Furthermore, the two first thickened portions 2013 are each formed with a smooth arc wall first thickened portion 2013 connecting the first connecting portion 1 and the first side plate segment 2011, so that a smooth arc transition is formed between the first connecting portion 1 and the first side plate segment 2011, which is beneficial to avoid stress concentration on the first thickened portion 2013 (such as Figure 2 Similarly, the two second thickened portions 2023 are each formed with a smooth arc wall connecting the first connecting portion 1 and the second side plate segment 2021, so that a smooth arc transition is formed between the first connecting portion 1 and the second side plate segment 2021, which is beneficial to avoiding stress concentration on the second thickened portion 2023.

[0039] In one embodiment of the utility model, the second connecting part 2 also includes a third connecting plate body 203 arranged in the horizontal direction. In the width direction of the third connecting plate body 203, the two sides of the third connecting plate body 203 are respectively connected to the first side plate segment 2011 and the second side plate segment 2021. The setting of the third connecting plate body 203 further enhances the connection stability between the first connecting plate body 201 and the second connecting plate body 202, and also enhances the structural strength of the second connecting part 2 as a whole and the connecting rod as a whole.

[0040] In one embodiment of the utility model, one end of the third connecting plate body 203 in the length direction is connected to the first connecting part 1, and the connections between the top wall of the third connecting plate body 203, the bottom wall of the third connecting plate body 203 and the outer peripheral wall of the first connecting part 1 are all formed as smooth arc transitions. This structural setting enables a smooth arc transition to be formed between the first connecting part 1 and the third connecting plate body 203, thereby avoiding stress concentration at the connection position between the first connecting part 1 and the third connecting plate body 203.

[0041] In one embodiment of the utility model, a hollow portion 2031 is formed on the third connecting plate body 203. The hollow portion 2031 is a through hole structure that vertically penetrates the third connecting plate body 203, which is conducive to reducing the overall weight of the connecting rod, so as to achieve a lightweight design of the connecting rod, and can also reduce the manufacturing materials of the connecting rod and reduce the production cost of the connecting rod. Further, the shape of the hollow portion 2031 includes a waist shape, a circle or an ellipse. The hollow portion 2031 of the above shape has a simple structure and is easy to manufacture and process.

[0042] In one embodiment of the utility model, the second connecting part 2 also includes a rib plate body 204 which is arranged at one end of the third connecting plate body 203 away from the first connecting part 1 and distributed vertically. In the width direction of the third connecting plate body 203, the two ends of the rib plate body 204 are respectively connected to the first side plate segment 2011 and the second side plate segment 2021. The setting of the rib plate body 204 forms a T-shaped structure between the third connecting plate body 203 and the rib plate body 204, and also forms a T-shaped structure between the end of the first side plate segment 2011 or the second side plate segment 2021 close to the first cylindrical segment 2012 and the rib plate body 204. This structural design is simple in form and easy to produce. When the connecting rod is twisted by an off-center load, the force on the connecting rod can be more uniform.

[0043] In one embodiment of the utility model, the connection between the side wall of the first side panel segment 2011, the side wall of the second side panel segment 2021 and the first side wall of the rib plate body 204 is formed into a smooth arc transition; the connection between the side wall of the first side panel segment 2011, the side wall of the second side panel segment 2021 and the second side wall of the rib plate body 204 is formed into a smooth arc transition, wherein, in the length direction of the connecting rod, the first side wall of the rib plate body 204 and the second side wall of the rib plate body 204 are opposite, and the above arrangement can effectively avoid the situation where stress concentration occurs at the rib plate body 204 and its connection positions with the first side panel segment 2011 and the second side panel segment 2021 (such as Figure 2 shown).

[0044] Another embodiment of the present invention provides a novel working device, which includes the connecting rod for the working device in the above embodiment.

[0045] Another embodiment of the utility model provides a novel excavating device, which includes the working device in the above embodiment.

[0046] In the description of the present application, it should be understood that 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A connecting rod for a working device, characterized in that: The connecting rod comprises: A first connecting portion (1) is cylindrical and is used to connect to a bucket of a working device; The second connecting part (2) is integrally cast with the first connecting part (1) and comprises a first connecting plate body (201) and a second connecting plate body (202) which are spaced apart and parallel to the axial direction of the first connecting part (1), wherein the first end of each of the first connecting plate body (201) and the second connecting plate body (202) is connected to the first connecting part (1), and the second end of the first connecting plate body (201) and the second end of the second connecting plate body (202) work together to connect the bucket drive member of the working device.

2. The connecting rod for a working device according to claim 1, characterized in that: The first connecting plate body (201) comprises a first side plate section (2011) and a first cylindrical section (2012), and two ends of the first side plate section (2011) are respectively connected to the first connecting portion (1) and the first cylindrical section (2012); The second connecting plate body (202) comprises a second side plate section (2021) and a second cylindrical section (2022), and two ends of the second side plate section (2021) are respectively connected to the first connecting portion (1) and the second cylindrical section (2022); The first cylindrical section (2012) and the second cylindrical section (2022) are connected to the bucket driving member via a connecting shaft.

3. The connecting rod for a working device according to claim 2, characterized in that: In the width direction of the connecting rod, the two opposite side walls of the first side plate section (2011) are respectively the first side wall and the second side wall, and the first thickened portion (2013) is formed at the connection between the first side wall, the second side wall and the outer peripheral wall of the first connecting portion (1); the two opposite side walls of the second side plate section (2021) are respectively the third side wall and the fourth side wall, and the second thickened portion (2023) is formed at the connection between the third side wall, the fourth side wall and the outer peripheral wall of the first connecting portion (1).

4. The connecting rod for a working device according to claim 2, characterized in that: The second connecting portion (2) further comprises a third connecting plate body (203) arranged in a horizontal direction, and in a width direction of the third connecting plate body (203), two sides of the third connecting plate body (203) are respectively connected to the first side plate segment (2011) and the second side plate segment (2021).

5. The connecting rod for a working device according to claim 4, characterized in that: One end of the third connecting plate body (203) in the length direction is connected to the first connecting portion (1), and the connections between the top wall of the third connecting plate body (203), the bottom wall of the third connecting plate body (203) and the outer peripheral wall of the first connecting portion (1) are all formed into smooth arc transitions.

6. The connecting rod for a working device according to claim 4, characterized in that: A hollow portion (2031) is formed on the third connecting plate body (203).

7. The connecting rod for a working device according to claim 4, characterized in that: The second connecting portion (2) further comprises a rib plate body (204) which is arranged at one end of the third connecting plate body (203) away from the first connecting portion (1) and is distributed vertically, and in the width direction of the third connecting plate body (203), two ends of the rib plate body (204) are respectively connected to the first side plate segment (2011) and the second side plate segment (2021).

8. The connecting rod for a working device according to claim 7, characterized in that: The connection between the side wall of the first side panel segment (2011), the side wall of the second side panel segment (2021) and the first side wall of the rib plate body (204) is formed as a smooth arc transition, and the connection between the side wall of the first side panel segment (2011), the side wall of the second side panel segment (2021) and the second side wall of the rib plate body (204) is formed as a smooth arc transition, wherein in the length direction of the connecting rod, the first side wall of the rib plate body (204) and the second side wall of the rib plate body (204) are opposite to each other.

9. A working device, characterized in that: The working device comprises a connecting rod for a working device according to any one of claims 1-8.

10. An excavation device, characterized in that: The excavating equipment comprises a working device according to claim 9.

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