Connecting structure for A-shaped frame, A-shaped frame and operation machine

Abstract

The utility model discloses a connecting structure for an A-shaped frame, the A-shaped frame and an operation machine.The A-shaped frame comprises a pressing rod, a balancing frame and a connecting plate assembly, the balancing frame is arranged on one side of the pressing rod, the balancing frame and the pressing rod are located on the same vertical plane, and the connecting plate assembly is arranged on the outer side of the pressing rod and the outer side of the balancing frame and prevents the pressing rod and the balancing frame from moving in the longitudinal direction; the connecting structure comprises a pin shaft assembly, the first end of the pin shaft assembly is clamped on the side end face of a connecting plate assembly, and the second end of the pin shaft assembly longitudinally penetrates through the connecting plate assembly, a pressing rod and a balancing frame; the limiting plate assembly is arranged on one side of the connecting plate assembly and detachably connected with the second end of the pin shaft assembly, and the limiting plate assembly is used for preventing the pin shaft assembly from moving in the longitudinal direction; and the locking assembly is detachably arranged on the limiting plate assembly and used for locking the limiting plate assembly. According to the connecting structure for the A-shaped frame, welding is not needed in the process of connecting the pressing rod and the balancing frame together, the assembling difficulty is lowered, and time and labor are saved.

Description

Technical Field

[0001] This application belongs to the field of construction machinery technology, specifically relating to a connection structure for an A-frame, the A-frame, and construction machinery. Background Technology

[0002] In operational machinery (such as mining excavators), the A-frame is connected to the upper boom via tension ropes to lift the upper boom. The pressure bar and balance frame within the A-frame are connected via connecting plates and connecting plate pins. In existing A-frame designs, to restrict the rotation of the connecting plate pin, an end plate is installed on the pin, and a first limiting plate is welded to the connecting plate. A second limiting plate is then bolted onto the first limiting plate to fix the end plate, thus securing the connecting plate pin. A baffle is then installed at the other end of the pin to restrict axial movement of the pin and the connecting plates at both ends. However, this connection structure necessitates welding on the connecting plate during manufacturing, which can affect the plate's strength and may lead to assembly difficulties, numerous steps, and time-consuming and labor-intensive manufacturing processes. Utility Model Content

[0003] The purpose of this application is to provide a connection structure for an A-frame, an A-frame, and a working machine. This connection structure for the A-frame eliminates the need for welding during the connection of the pressure bar and the balance frame, reducing assembly difficulty and saving time and effort.

[0004] To achieve the above objectives, a first aspect of this application provides a connection structure for an A-frame, the A-frame including a pressure bar, a balance frame, and a connecting plate assembly. The balance frame is disposed on one side of the pressure bar and is located in the same vertical plane as the pressure bar. The connecting plate assembly is disposed outside the pressure bar and the balance frame and prevents the pressure bar and the balance frame from moving longitudinally. The connection structure includes:

[0005] The pin assembly has its first end locked onto the side end face of the connecting plate assembly, and its second end longitudinally passes through the connecting plate assembly, the pressure bar, and the balance frame.

[0006] A limiting plate assembly is disposed on one side of the connecting plate assembly and detachably connected to the second end of the pin assembly. The limiting plate assembly is used to prevent the pin assembly from moving longitudinally.

[0007] A locking assembly is detachably mounted on the limit plate assembly and is used to lock the limit plate assembly.

[0008] In the embodiments of this application, the pin assembly includes a first pin and a second pin that are parallel and spaced apart. The first end of the first pin is engaged on the side end face of the connecting plate assembly, and the second end of the first pin passes longitudinally through the connecting plate assembly and the pressure rod. The first end of the second pin is engaged on the side end face of the connecting plate assembly, and the second end of the second pin passes longitudinally through the connecting plate assembly and the balance frame. The limiting plate assembly includes a first limiting plate and a second limiting plate. The first limiting plate is disposed on the second end of the first pin and forms a first engaging engagement with the first pin. The second limiting plate is disposed on the second end of the second pin and forms a second engaging engagement with the second pin.

[0009] In the embodiments of this application, a first slot and a second slot are formed at the second end of the first pin and the second end of the second pin, respectively. A snap-in portion and a handle portion located on one side of the snap-in portion are formed on the first limiting plate and the second limiting plate, respectively. A snap-fit ​​groove is formed on the snap-fit ​​portion. A first snap-fit ​​body and a second snap-fit ​​body are formed on both sides of the snap-fit ​​groove, respectively. A portion of the first snap-fit ​​body extends into the first slot and a portion of the second snap-fit ​​body extends into the second slot. A locking assembly is disposed on the handle portion of the first limiting plate and the handle portion of the second limiting plate. The handle portion of the first limiting plate and / or the handle portion of the second limiting plate are detachably connected to the locking assembly.

[0010] In embodiments of this application, the pin assembly includes a first pin and a second pin that are parallel and spaced apart. The first end of the first pin is engaged on the side end face of the connecting plate assembly, and the second end of the first pin passes longitudinally through the connecting plate assembly and the pressure rod. The first end of the second pin is engaged on the side end face of the connecting plate assembly, and the second end of the second pin passes longitudinally through the connecting plate assembly and the balance frame. The limiting plate assembly includes a first limiting plate and a second limiting plate. The first limiting plate is disposed at the second end of the first pin and is detachably connected to the first bolt assembly. The second limiting plate is disposed at the second end of the second pin and is detachably connected to the second bolt assembly.

[0011] In the embodiments of this application, both the first limiting plate and the second limiting plate include a circular plate portion and a handle portion disposed on one side of the circular plate portion. The circular plate portion of the first limiting plate is detachably connected to the second end of the first pin shaft via a first bolt assembly, and the circular plate portion of the second limiting plate is detachably connected to the second end of the second pin shaft via a second bolt assembly. A locking assembly is disposed on a portion of the handle portion of the first limiting plate and a portion of the handle portion of the second limiting plate, and the handle portion of the first limiting plate and / or the handle portion of the second limiting plate is detachably connected to the locking assembly.

[0012] In the embodiments of this application, the limiting plate assembly includes a first limiting plate and a second limiting plate, and the locking assembly includes a locking member and a third bolt assembly. The locking member is disposed on the handle portion of the first limiting plate and the handle portion of the second limiting plate, and the handle portion of the first limiting plate and / or the handle portion of the second limiting plate are detachably connected to the locking member through the third bolt assembly.

[0013] In the embodiments of this application, a receiving groove is formed on the side of the locking member facing the first limiting plate and the second limiting plate. A portion of the handle portion of the first limiting plate and a portion of the handle portion of the second limiting plate are received in the receiving groove. The handle portion of the first limiting plate or the handle portion of the second limiting plate is detachably connected to the locking member through a third bolt assembly.

[0014] In the embodiments of this application, the locking member is flat.

[0015] A second aspect of this application provides an A-frame that includes the aforementioned connection structure for the A-frame.

[0016] A third aspect of this application provides a work machine that includes the aforementioned A-frame.

[0017] As shown in the above technical solution, the A-frame includes a pressure rod, a balance frame, and a connecting plate assembly. The balance frame is located on one side of the pressure rod and is in the same vertical plane as the pressure rod. The connecting plate assembly is located outside the pressure rod and the balance frame and prevents the pressure rod and the balance frame from moving longitudinally. This connection structure includes: a pin assembly, the first end of which is engaged with the side end face of the connecting plate assembly, and the second end of which longitudinally passes through the connecting plate assembly, the pressure rod, and the balance frame; a limiting plate assembly, located on one side of the connecting plate assembly and detachably connected to the second end of the pin assembly, which prevents the pin assembly from moving longitudinally; and a locking assembly, detachably mounted on the limiting plate assembly and used to lock the limiting plate assembly. This connection structure eliminates the need for welding during the assembly of the pressure rod, the balance frame, and the connecting plate assembly, avoiding the stress effects of welding and increasing the structural reliability of the A-frame. Furthermore, it saves time and labor costs, ensures stable production quality, and facilitates installation, disassembly, and maintenance.

[0018] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0020] Figure 1 This is a partial exploded view of the A-type frame in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of a first partial structure of the A-frame in the embodiments of this application;

[0022] Figure 3 This is a schematic diagram of a second partial structure of the A-frame in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the third partial structure of the A-type frame in the embodiments of this application.

[0024] Explanation of reference numerals in the attached figures

[0025] 1-Pressure bar; 2-Balance frame; 3-Connecting plate assembly; 301-First connecting plate; 302-Second connecting plate; 4-Pin assembly; 401-First pin; 402-Second pin; 403-First slot; 404-Pin part; 405-Baffle part; 5-Limiting plate assembly; 501-First limiting plate; 502-Second limiting plate; 503-Snap-in part; 504-Handle part; 505-Snap-in groove; 506-Circular plate part; 6-Locking assembly; 601-Locking element; 602-Third bolt assembly; 603-Receiving groove; 7-First bolt assembly; 8-Second bolt assembly. Detailed Implementation

[0026] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0027] The embodiments of this application provide a connection structure for an A-frame, such as... Figures 1-4 As shown, the A-frame includes a pressure bar 1, a balance frame 2, and a connecting plate assembly 3. The balance frame 2 is located on one side of the pressure bar 1 and is in the same vertical plane as the pressure bar 1. The connecting plate assembly 3 is located outside the pressure bar 1 and the balance frame 2 and prevents the pressure bar 1 and the balance frame 2 from moving longitudinally. The connection structure includes:

[0028] The first end of the pin assembly 4 is engaged on the side end face of the connecting plate assembly 3, and the second end of the pin assembly 4 passes longitudinally through the connecting plate assembly 3, the pressure rod 1 and the balance frame 2.

[0029] The limiting plate assembly 5 is disposed on one side of the connecting plate assembly 3 and detachably connected to the second end of the pin assembly 4. The limiting plate assembly 5 is used to prevent the pin assembly 4 from moving longitudinally.

[0030] The locking component 6 is detachably mounted on the limiting plate assembly 5 and is used to lock the limiting plate assembly 5.

[0031] Specifically, the balance frame 2 is positioned diagonally above the pressure bar 1, and the connecting plate assembly 3 includes a first connecting plate 301 and a second connecting plate 302. The first connecting plate 301 is positioned on the same longitudinal side of the pressure bar 1 and the balance frame 2, and the second connecting plate 302 is positioned on the other longitudinal side of the pressure bar 1 and the balance frame 2 away from the first connecting plate 301. That is, the pressure bar 1 and the balance frame 2 are restricted between the first connecting plate 301 and the second connecting plate 302 and cannot move longitudinally. The pin assembly 4 passes through the first connecting plate 301, the pressure rod 1, the balance frame 2, and the second connecting plate 302. Then, the limiting plate assembly 5 is installed on the pin assembly 4 to prevent the pin assembly 4 from moving longitudinally and dislodging from the overall structure composed of the first connecting plate 301, the pressure rod 1, the balance frame 2, and the second connecting plate 302. Finally, the locking assembly 6 is installed together with the limiting plate assembly 5 to lock the limiting plate assembly 5, ensuring the stability of the limiting plate assembly 5 after installation. This also ensures that the first connecting plate 301, the pressure rod 1, the balance frame 2, the second connecting plate 302, the pin assembly 4, the limiting plate assembly 5, and the locking assembly 6 form a tightly connected and reliably installed whole. This connection structure eliminates the need for welding during the assembly of the pressure rod 1, the balance frame 2, and the connecting plate assembly 3, avoiding the stress effects of welding and increasing the structural reliability of the A-frame. Furthermore, it saves time and labor costs, ensures stable production quality, and facilitates installation, disassembly, and maintenance.

[0032] In one embodiment of this application, such as Figure 2 and Figure 4 As shown, the pin assembly 4 includes a first pin 401 and a second pin 402 that are parallel and spaced apart. The first end of the first pin 401 is engaged on the side end face of the connecting plate assembly 3, and the second end of the first pin 401 passes longitudinally through the connecting plate assembly 3 and the pressure rod 1. The first end of the second pin 402 is engaged on the side end face of the connecting plate assembly 3, and the second end of the second pin 402 passes longitudinally through the connecting plate assembly 3 and the balance frame 2. The limiting plate assembly 5 includes a first limiting plate 501 and a second limiting plate 502. The first limiting plate 501 is disposed on the second end of the first pin 401 and forms a first engaging engagement with the first pin 401. The second limiting plate 502 is disposed on the second end of the second pin 402 and forms a second engaging engagement with the second pin 402.

[0033] Specifically, a first connecting hole is formed on the pressure rod 1, a second connecting hole is formed on the balance frame 2, a third connecting hole and a fourth connecting hole are formed on the first connecting plate 301, and a fifth connecting hole and a sixth connecting hole are formed on the second connecting plate 302. The first, third, and fifth connecting holes correspond to each other, as do the second, fourth, and sixth connecting holes. Both the first pin 401 and the second pin 402 include a pin portion 404 and a baffle portion 405 disposed at one end of the pin portion 404. The baffle portion 405 of the first pin 401 is engaged with the side end face of the first connecting plate 301. The pin portion 404 of the pin 401, away from the baffle portion 405, passes through the third connecting hole, the first connecting hole, and the fifth connecting hole in sequence. The baffle portion 405 of the second pin 402 is engaged on the side end face of the first connecting plate 301. The pin portion 404 of the second pin 402, away from the baffle portion 405, passes through the fourth connecting hole, the second connecting hole, and the sixth connecting hole in sequence. The first limiting plate 501 is engaged with the pin portion 404 of the first pin 401, away from the baffle portion 405. The second limiting plate 502 is engaged with the pin portion 404 of the second pin 402, away from the baffle portion 405. When installing the A-frame, with the pressure rod 1 in a fixed state, the first connecting plate 301, the second connecting plate 302, and the balance frame 2 are lifted and their positions adjusted in sequence to make the first connecting hole, the third connecting hole, and the fifth connecting hole concentric, and the second connecting hole, the fourth connecting hole, and the sixth connecting hole concentric. Then, the first pin 401 is passed through the first connecting hole, the third connecting hole, and the fifth connecting hole, and the second pin 402 is passed through the second connecting hole, the fourth connecting hole, and the sixth connecting hole. After the first pin 401 and the second pin 402 are installed, the first limiting plate 501 and the second limiting plate 502 are installed on the first pin 401 and the second pin 402 respectively. Finally, the locking assembly 6 is connected to the first limiting plate 501 and the second limiting plate 502. The above installation process is quick, convenient, and saves time and effort.

[0034] In one embodiment of this application, a first slot 403 and a second slot opposite to the first slot 403 are formed on the second end of the first pin 401 and the second end of the second pin 402. A snap-in portion 503 and a handle portion 504 located on one side of the snap-in portion 503 are formed on the first limiting plate 501 and the second limiting plate 502. A snap-fit ​​groove 505 is formed on the snap-fit ​​portion 503. A first snap-fit ​​body and a second snap-fit ​​body are formed on both sides of the snap-fit ​​groove 505, respectively. A portion of the first snap-fit ​​body extends into the first slot 403 and a portion of the second snap-fit ​​body extends into the second slot. The locking assembly 6 is disposed on the handle portion 504 of a portion of the first limiting plate 501 and the handle portion 504 of a portion of the second limiting plate 502. The handle portion 504 of the first limiting plate 501 and / or the handle portion 504 of the second limiting plate 502 are detachably connected to the locking assembly 6.

[0035] Specifically, in this embodiment, the handle portion 504 is strip-shaped. After the first pin 401 and the second pin 402 are installed, the second ends of each of the first pin 401 and the second pin 402 protrude from the second connecting plate 302. The first limiting plate 501 and the second limiting plate 502 are located on the same vertical plane, and the handle portion 504 of the first limiting plate 501 and the handle portion 504 of the second limiting plate 502 are located on the same straight line. The first locking groove 403 and the second locking groove are formed at the end of the pin portion 404 away from the baffle portion 405 and are located on the outer peripheral wall of the pin portion 404. The opening direction of the locking groove 505 is away from the direction of the handle portion 504, that is, the extension direction of the handle portion 504 is away from the opening of the locking groove 505. When installing the first limiting plate 501 and the second limiting plate 502, the first limiting plate 501 (or the second limiting plate 502) is moved toward the second end of the first pin 401 (or the second pin 402) so that the portion of the pin 404 located between the first slot 403 and the second slot enters the locking groove 505. Simultaneously, a portion of the first locking body extends into the first slot 403 and a portion of the second locking body extends into the second slot. This arrangement causes the first limiting plate 501 to lock the first pin 401 and the second limiting plate 502 to lock the second pin 402. The limiting plate 501 and the baffle portion 405 of the first pin 401 work together to prevent the pin portion 404 of the first pin 401 from moving axially. The second limiting plate 502 and the baffle portion 405 of the second pin 402 work together to prevent the pin portion 404 of the second pin 402 from moving axially. This arrangement facilitates the installation or removal of the first limiting plate 501 and the second limiting plate 502, and ensures the connection stability between the first pin 401, the second pin 402, the first connecting plate 301, the second connecting plate 302, the pressure rod 1, and the balance frame 2. After the first limiting plate 501 and the second limiting plate 502 are installed, the handle portion 504 of the first limiting plate 501 and / or the handle portion 504 of the second limiting plate 502 are installed together with the locking assembly 6. After the locking assembly 6 is installed, it can also prevent the first pin 401 and the second pin 402 from pivoting.

[0036] In another embodiment of this application, such as Figure 3As shown, the pin assembly 4 includes a first pin 401 and a second pin 402 that are parallel and spaced apart. The first end of the first pin 401 is engaged on the side end face of the connecting plate assembly 3, and the second end of the first pin 401 passes longitudinally through the connecting plate assembly 3 and the pressure rod 1. The first end of the second pin 402 is engaged on the side end face of the connecting plate assembly 3, and the second end of the second pin 402 passes longitudinally through the connecting plate assembly 3 and the balance frame 2. The limiting plate assembly 5 includes a first limiting plate 501 and a second limiting plate 502. The first limiting plate 501 is disposed at the second end of the first pin 401 and is detachably connected to the first bolt assembly 7. The second limiting plate 502 is disposed at the second end of the second pin 402 and is detachably connected to the second bolt assembly 8.

[0037] Specifically, a first connecting hole is formed on the pressure rod 1, a second connecting hole is formed on the balance frame 2, a third connecting hole and a fourth connecting hole are formed on the first connecting plate 301, and a fifth connecting hole and a sixth connecting hole are formed on the second connecting plate 302. The first, third, and fifth connecting holes correspond to each other, as do the second, fourth, and sixth connecting holes. Both the first pin 401 and the second pin 402 include a pin portion 404 and a baffle portion 405 disposed at one end of the pin portion 404. The baffle portion 405 of the first pin 401 is engaged with the side end face of the first connecting plate 301. 4. The end of the second pin 402 away from the baffle portion 405 passes through the third connecting hole, the first connecting hole, and the fifth connecting hole in sequence. The baffle portion 405 of the second pin 402 is engaged on the side end face of the first connecting plate 301. The end of the second pin 402 away from the baffle portion 405 passes through the fourth connecting hole, the second connecting hole, and the sixth connecting hole in sequence. The first limiting plate 501 is installed on the side end face of the end of the first pin 401 away from the baffle portion 405 by the first bolt assembly 7. The second limiting plate 502 is installed on the side end face of the end of the second pin 402 away from the baffle portion 405 by the second bolt assembly 8. When installing the A-frame, with the pressure rod 1 in a fixed state, lift and adjust the positions of the first connecting plate 301, the second connecting plate 302, and the balance frame 2 to make the first connecting hole, the third connecting hole, and the fifth connecting hole concentric, and the second connecting hole, the fourth connecting hole, and the sixth connecting hole concentric. Then, pass the first pin 401 through the first connecting hole, the third connecting hole, and the fifth connecting hole, and pass the second pin 402 through the second connecting hole, the fourth connecting hole, and the sixth connecting hole. After the first pin 401 and the second pin 402 are installed, install the first limiting plate 501 and the second limiting plate 502 on the first pin 401 and the second pin 402 respectively through the first bolt assembly 7 and the second bolt assembly 8. Finally, connect the locking assembly 6 to the first limiting plate 501 and the second limiting plate 502. After the locking assembly 6 is installed, it can also prevent the first pin 401 and the second pin 402 from pivoting.

[0038] In one embodiment of this application, such as Figure 3 As shown, both the first limiting plate 501 and the second limiting plate 502 include a circular plate portion 506 and a handle portion 504 disposed on one side of the circular plate portion 506. The circular plate portion 506 of the first limiting plate 501 is detachably connected to the second end of the first pin 401 via a first bolt assembly 7. The circular plate portion 506 of the second limiting plate 502 is detachably connected to the second end of the second pin 402 via a second bolt assembly 8. The locking assembly 6 is disposed on a portion of the handle portion 504 of the first limiting plate 501 and a portion of the handle portion 504 of the second limiting plate 502. The handle portion 504 of the first limiting plate 501 or the handle portion 504 of the second limiting plate 502 is detachably connected to the locking assembly 6.

[0039] Specifically, in this embodiment, the handle portion 504 is strip-shaped. After the first pin 401 and the second pin 402 are installed, the side end faces of the second ends of the first pin 401 and the second pin 402 are flush with the side end faces of the second connecting plate 302. The first limiting plate 501 and the second limiting plate 502 are located on the same vertical plane. The handle portion 504 of the first limiting plate 501 and the handle portion 504 of the second limiting plate 502 are located on the same straight line. When installing the first limiting plate 501 and the second limiting plate 502, the circular plate portion 506 of the first limiting plate 501 is connected to the second end of the first pin 401 through the first bolt assembly 7, and the circular plate portion 506 of the second limiting plate 502 is connected to the second end of the second pin 402 through the second bolt assembly 8. To further reduce the complexity of installation, in this embodiment, the locking assembly 6 is then simultaneously installed on the handle portion 504 of the first limiting plate 501 and the handle portion 504 of the second limiting plate 502, and then the handle portion 504 of the first limiting plate 501 or the handle portion 504 of the second limiting plate 502 is connected to the locking assembly 6.

[0040] In one embodiment of this application, the limiting plate assembly 5 includes a first limiting plate 501 and a second limiting plate 502, and the locking assembly 6 includes a locking member 601 and a third bolt assembly 602. The locking member 601 is disposed on the handle portion 504 of the first limiting plate 501 and the handle portion 504 of the second limiting plate 502. The handle portion 504 of the first limiting plate 501 and / or the handle portion 504 of the second limiting plate 502 are detachably connected to the locking member 601 through the third bolt assembly 602.

[0041] Specifically, when installing the locking assembly 6, the locking member 601 is first set on the handle portion 504 of the first limiting plate 501 and the handle portion 504 of the second limiting plate 502. Then, the locking member 601 is connected to the handle portion 504 of the first limiting plate 501 and / or the handle portion 504 of the second limiting plate 502 by the third bolt assembly 602. The above structural design not only ensures the tightness of the connection between the first limiting plate 501 and / or the second limiting plate 502 and the locking member 601, but also allows the first limiting plate 501, the second limiting plate 502 and the locking member 601 to have a certain adjustment space during the installation process, ensuring the reliability of the installation, and also facilitating the maintenance of the A-frame later.

[0042] Furthermore, in this embodiment, the first bolt assembly 7, the second bolt assembly 8, and the third bolt assembly 602 each include multiple (e.g., 4 or 8) bolts arranged in a matrix. This design further enhances the connection stability between the two components connected by the bolt assembly.

[0043] In one embodiment of this application, such as Figure 4 As shown, the locking member 601 is flat. Specifically, in the embodiment where the first limiting plate 501 and the second limiting plate 502 are connected to the first pin 401 and the second pin 402 respectively through the first slot 403 and the second slot, the locking member 601 can be set as flat. This structural shape of the locking member 601 is convenient for processing and manufacturing, and also convenient for connection with the limiting plate assembly 5 through the third bolt assembly 602. Furthermore, when the locking member 601 is flat, the locking member 601 is simultaneously connected to the handle portion 504 of the first limiting plate 501 and the handle portion 504 of the second limiting plate 502 through the third bolt assembly 602. After the locking assembly 6 is installed, the locking assembly 6 and the limiting assembly form a whole, which can prevent the first limiting plate 501 and the second limiting plate 502 from moving relative to each other along their setting direction (i.e., the direction of the line connecting the central axis of the first pin 401 and the central axis of the second pin 402).

[0044] In another embodiment of this application, such as Figures 2-3 As shown, the locking member 601 has a receiving groove 603 formed on the side facing the first limiting plate 501 and the second limiting plate 502. Part of the handle portion 504 of the first limiting plate 501 and part of the handle portion 504 of the second limiting plate 502 are received in the receiving groove 603. The handle portion 504 of the first limiting plate 501 or the handle portion 504 of the second limiting plate 502 is detachably connected to the locking member 601 through the third bolt assembly 602.

[0045] Specifically, regardless of whether the limiting plate assembly 5 is connected to the pin assembly 4 via a snap-fit ​​or a bolt connection, the locking member 601 can be configured with a receiving groove 603. The structure and dimensions of the first limiting plate 501 are consistent with those of the second limiting plate 502. The receiving groove 603 extends along the length of the locking member 601, and its width is consistent with the width of the handle portion 504. After the first limiting plate 501 and the second limiting plate 502 are respectively installed on the first pin 401 and the second pin 402, the locking member 601 is then fastened onto the handle portion 504 of the first limiting plate 501 and the handle portion 504 of the second limiting plate 502. Part of the handle portion 504 of the first limiting plate 501 and part of the handle portion 504 of the second limiting plate 502 are accommodated in the receiving groove 603. Then, the third bolt assembly 602 is used to secure the first pin 501 to the second pin 402. The handle portion 504 of the first limiting plate 501 or the handle portion 504 of the second limiting plate 502 can be connected to the locking member 601. The side walls on both sides of the receiving groove 603 can restrict the relative movement of the handle portion 504 of the first limiting plate 501 and the handle portion 504 of the second limiting plate 502, and can eliminate the harmful local degree of freedom of rotation of the first pin 401 (or the second pin 402) relative to the first connecting plate 301 (or the second connecting plate 302).

[0046] Another embodiment of this application provides an A-frame, which includes a pressure bar 1, a balance frame 2, a connecting plate assembly 3, and the connection structure for the A-frame described above. The A-frame is suitable for working machinery (such as an excavator) and is connected to the upper boom of the working machinery via a tension rope.

[0047] Another embodiment of this application provides a working machine that includes the A-frame described in the above embodiments.

[0048] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0051] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A connection structure for an A-frame, the A-frame comprising a pressure bar (1), a balance frame (2), and a connecting plate assembly (3), the balance frame (2) being disposed on one side of the pressure bar (1) and located in the same vertical plane as the pressure bar (1), the connecting plate assembly (3) being disposed outside the pressure bar (1) and the balance frame (2) and preventing the pressure bar (1) and the balance frame (2) from moving longitudinally, characterized in that, The connection structure includes: A pin assembly (4) has its first end engaged on the side end face of the connecting plate assembly (3) and its second end longitudinally passing through the connecting plate assembly (3), the pressure rod (1), and the balance frame (2). A limiting plate assembly (5) is disposed on one side of the connecting plate assembly (3) and detachably connected to the second end of the pin assembly (4). The limiting plate assembly (5) is used to prevent the pin assembly (4) from moving longitudinally. A locking assembly (6) is detachably disposed on the limiting plate assembly (5) and is used to lock the limiting plate assembly (5).

2. The connection structure for an A-frame according to claim 1, characterized in that, The pin assembly (4) includes a first pin (401) and a second pin (402) distributed in parallel. The first end of the first pin (401) is engaged on the side end face of the connecting plate assembly (3). The second end of the first pin (401) passes longitudinally through the connecting plate assembly (3) and the pressure rod (1). The first end of the second pin (402) is engaged on the side end face of the connecting plate assembly (3). The second end of the second pin (402) passes longitudinally through the connecting plate assembly (3) and the balance frame (2). The limiting plate assembly (5) includes a first limiting plate (501) and a second limiting plate (502). The first limiting plate (501) is disposed on the second end of the first pin (401) and forms a first engaging engagement with the first pin (401). The second limiting plate (502) is disposed on the second end of the second pin (402) and forms a second engaging engagement with the second pin (402).

3. The connection structure for an A-frame according to claim 2, characterized in that, The second end of the first pin (401) and the second end of the second pin (402) are each provided with a first slot (403) and a second slot opposite to the first slot (403). The first limiting plate (501) and the second limiting plate (502) are each provided with a locking portion (503) and a handle portion (504) located on one side of the locking portion (503). The locking portion (503) is provided with a locking groove (505), and first locking plates are formed on both sides of the locking groove (505). The locking assembly (6) comprises a first locking body and a second locking body, wherein a portion of the first locking body extends into the first locking groove (403) and a portion of the second locking body extends into the second locking groove. The locking assembly (6) is disposed on a portion of the handle portion (504) of the first limiting plate (501) and a portion of the handle portion (504) of the second limiting plate (502). The handle portion (504) of the first limiting plate (501) and / or the handle portion (504) of the second limiting plate (502) are detachably connected to the locking assembly (6).

4. The connection structure for an A-frame according to claim 1, characterized in that, The pin assembly (4) includes a first pin (401) and a second pin (402) distributed in parallel. The first end of the first pin (401) is engaged on the side end face of the connecting plate assembly (3). The second end of the first pin (401) passes longitudinally through the connecting plate assembly (3) and the pressure rod (1). The first end of the second pin (402) is engaged on the side end face of the connecting plate assembly (3). The second end of the second pin (402) passes longitudinally through the connecting plate assembly (3) and the balance frame (2). The limiting plate assembly (5) includes a first limiting plate (501) and a second limiting plate (502). The first limiting plate (501) is disposed at the second end of the first pin (401) and is detachably connected to the first bolt assembly (7). The second limiting plate (502) is disposed at the second end of the second pin (402) and is detachably connected to the second bolt assembly (8).

5. The connection structure for an A-frame according to claim 4, characterized in that, Both the first limiting plate (501) and the second limiting plate (502) include a circular plate portion (506) and a handle portion (504) disposed on one side of the circular plate portion (506). The circular plate portion (506) of the first limiting plate (501) is detachably connected to the second end of the first pin (401) through the first bolt assembly (7). The circular plate portion (506) of the second limiting plate (502) is detachably connected to the second end of the second pin (402) through the second bolt assembly (8). The locking assembly (6) is disposed on a portion of the handle portion (504) of the first limiting plate (501) and a portion of the handle portion (504) of the second limiting plate (502). The handle portion (504) of the first limiting plate (501) and / or the handle portion (504) of the second limiting plate (502) are detachably connected to the locking assembly (6).

6. The connection structure for an A-frame according to claim 1, characterized in that, The limiting plate assembly (5) includes a first limiting plate (501) and a second limiting plate (502). The locking assembly (6) includes a locking member (601) and a third bolt assembly (602). The locking member (601) is disposed on the handle portion (504) of the first limiting plate (501) and the handle portion (504) of the second limiting plate (502). The handle portion (504) of the first limiting plate (501) and / or the handle portion (504) of the second limiting plate (502) are detachably connected to the locking member (601) through the third bolt assembly (602).

7. The connection structure for an A-frame according to claim 6, characterized in that, The locking member (601) has a receiving groove (603) formed on the side facing the first limiting plate (501) and the second limiting plate (502). A portion of the handle portion (504) of the first limiting plate (501) and a portion of the handle portion (504) of the second limiting plate (502) are received in the receiving groove (603). The handle portion (504) of the first limiting plate (501) or the handle portion (504) of the second limiting plate (502) is detachably connected to the locking member (601) through the third bolt assembly (602).

8. The connection structure for an A-frame according to claim 6, characterized in that, The locking element (601) is flat.

9. An A-frame, characterized in that, The A-frame includes a pressure bar (1), a balance frame (2), a connecting plate assembly (3), and a connection structure for the A-frame according to any one of claims 1-8.

10. A type of operating machinery, characterized in that, The operating machinery includes the A-type frame according to claim 9.

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