Connection structure of a boom to a turntable and engineering machine

Abstract

The application belongs to the technical field of engineering mechanical equipment, and particularly relates to a connecting structure of a movable arm and a rotary table and engineering mechanical equipment. The connecting structure comprises a rotary table connecting seat, a movable arm connecting seat, a connecting pin shaft, a rotary table shaft sleeve, a movable arm shaft sleeve, a first limiting plate and a second limiting plate. The number of rotary table connecting seats is two, the rotary table connecting seats are arranged at intervals and coaxially provided with connecting holes, and the movable arm connecting seat is part of the movable arm and is provided with a connecting hole. Since the connecting pin shaft also rotates in the process of rotation of the movable arm, direct friction between the connecting pin shaft and the movable arm connecting seat and the rotary table connecting seat in the process of rotation is avoided, and therefore the movable arm shaft sleeve and the rotary table shaft sleeve are arranged. In the application, the axial limiting of the rotary table shaft sleeve is realized through the first limiting plate and the second limiting plate, and the movable arm shaft sleeve is limited by the rotary table shaft sleeve, so that the axial limiting of the rotary table shaft sleeve and the movable arm shaft sleeve is realized, and in turn the outward movement of the shaft sleeve is avoided.

Description

Technical Field

[0001] This application belongs to the technical field of engineering machinery equipment, specifically relating to a connection structure between a boom and a turntable and engineering machinery equipment. Background Technology

[0002] Construction machinery equipment is used for engineering construction and includes a turntable and a boom. The boom needs to be rotated and mounted on the turntable to achieve its basic functions.

[0003] In existing technologies, a connection structure consisting of a connecting pin and a bushing is generally used to connect the boom and the turntable. However, due to the significant vibrations experienced by construction machinery during operation, the bushing is prone to outward movement. This outward movement leads to poor lubrication, resulting in wear and damage to both the connecting pin and the bushing. Utility Model Content

[0004] The purpose of this application is to provide a connection structure between the boom and the turntable and an engineering machinery device, which aims to prevent the bushing from slipping outward.

[0005] To achieve the above objectives, this application provides a connection structure between a boom and a turntable, the connection structure comprising: A turntable connecting seat, a boom connecting seat, and a connecting pin are provided. The turntable connecting seat is mounted on a turntable, the boom connecting seat is mounted on the boom, and the connecting pin is used to connect the turntable connecting seat and the boom connecting seat. A turntable bushing is embedded in the connecting hole of the turntable connecting seat and sleeved on the connecting pin. The boom bushing is embedded in the connecting hole of the boom connecting seat and sleeved on the connecting pin. The first limiting plate and the second limiting plate are located at the two ends of the connecting pin and are used to limit the engagement with the turntable bushing along the axial direction.

[0006] In some embodiments, the first limiting plate includes a circular limiting portion and a locking portion that protrudes radially from the outer peripheral wall of the circular limiting portion. The outer diameter of the circular limiting portion is larger than the outer diameter of the turntable bushing, and the locking portion is used for limiting connection with the turntable connecting seat.

[0007] In some embodiments, the circular limiting portion is welded to the connecting pin.

[0008] In some embodiments, the connecting structure further includes a pin seat mounted on the turntable connecting seat, the pin seat having an insertion recess formed thereon, the locking part engaging with the insertion recess, and the connecting structure further includes a pressure plate for axially connecting with the pin seat.

[0009] In some embodiments, the second limiting plate includes an annular limiting portion and a circular connecting portion connected to the end face of the annular limiting portion. The annular limiting portion is used to limit the engagement with the turntable bushing along the axial direction, and the circular connecting portion is used to limit the connection with the connecting pin.

[0010] In some embodiments, the circular connecting part has multiple connecting holes, the end of the connecting pin has multiple threaded grooves, and the connecting structure further includes a connecting bolt for connecting the connecting holes and the threaded grooves.

[0011] In some embodiments, the connection structure further includes an adjusting shim located between the turntable connecting seat and the boom connecting seat, the adjusting shim being sleeved on the connecting pin.

[0012] In some embodiments, the connection structure further includes a dustproof ring located between the turntable bushing and the boom bushing, the dustproof ring being fitted onto the connecting pin.

[0013] In some embodiments, the dust seal is sandwiched between the adjusting shim and the boom bushing.

[0014] This application also provides an engineering machinery device, including the connection structure described above.

[0015] Through the above technical solutions, the boom-turntable connection structure and engineering machinery equipment provided in this application have the following technical effects: A turntable connecting seat is mounted on a turntable, and a boom connecting seat is mounted on the boom. A turntable bushing is embedded in the connecting hole of the turntable connecting seat, and a boom bushing is embedded in the connecting hole of the boom connecting seat. A connecting pin passes through the turntable connecting seat and the boom connecting seat and rotatably engages with both the turntable bushing and the boom bushing. In this application, the axial positioning of the turntable bushing is achieved through a first limiting plate and a second limiting plate, and the boom bushing is also limited by the turntable bushing, thereby achieving axial positioning of both the turntable bushing and the boom bushing and preventing bushing slippage.

[0016] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] 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: Figure 1This is a cross-sectional schematic diagram of the connection structure according to a specific embodiment of this application; Figure 2 This is an exploded view of the connection structure according to a specific embodiment of this application; Figure 3 This is a schematic diagram of the structure of the first limiting plate according to a specific embodiment of this application; Figure 4 This is a schematic diagram of the structure of the second limiting plate according to a specific embodiment of this application.

[0018] Explanation of reference numerals in the attached figures 100. Connecting structure; 1. Turntable connecting seat; 2. Boom connecting seat; 21. Injection hole; 3. Connecting pin; 4. Turntable bushing; 5. Boom bushing; 6. First limiting plate; 61. Circular limiting part; 62. Locking part; 7. Second limiting plate; 71. Circular limiting part; 72. Circular connecting part; 8. Pin seat; 81. Insertion notch; 9. Pressure plate; 10. Adjusting shim; 11. Dustproof ring. Detailed Implementation

[0019] 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.

[0020] The following description, with reference to the accompanying drawings, outlines the connection structure 100 between the boom and the turntable, and the nouns for the engineering machinery equipment according to this application.

[0021] like Figure 1 and Figure 2 As shown, a specific embodiment of this application provides a connection structure 100 for a boom and a turntable. The connection structure 100 includes a turntable connecting seat 1, a boom connecting seat 2, a connecting pin 3, a turntable bushing 4, a boom bushing 5, a first limiting plate 6, and a second limiting plate 7. The turntable connecting seat 1 is installed on the turntable, the boom connecting seat 2 is installed on the boom, the connecting pin 3 is used to connect the turntable connecting seat 1 and the boom connecting seat 2, the turntable bushing 4 is embedded in the connecting hole of the turntable connecting seat 1 and sleeved on the connecting pin 3, the boom bushing 5 is embedded in the connecting hole of the boom connecting seat 2 and sleeved on the connecting pin 3, and the first limiting plate 6 and the second limiting plate 7 are located at both ends of the connecting pin 3 and are used to limit the axial movement of the turntable bushing 4.

[0022] Two turntable connecting seats 1 are arranged at intervals and have coaxial connecting holes. The boom connecting seat 2, as part of the boom, also has connecting holes. Since the connecting pin 3 also rotates during boom rotation, boom bushing 5 and turntable bushing 4 are provided to avoid direct friction between the connecting pin 3 and boom connecting seats 2 and turntable connecting seats 1 during rotation. In this application, the first limiting plate 6 and the second limiting plate 7 are used to axially limit the turntable bushing 4, and the boom bushing 5 is limited by the turntable bushing 4, thereby achieving axial limitation of the turntable bushing 4 and boom bushing 5 and preventing bushing outward movement.

[0023] It should be noted that, in this application, "axial" refers to the left-right direction, meaning that the two turntable connecting seats 1 are arranged at intervals along the left-right direction and are respectively the left turntable connecting seat 1 and the right turntable connecting seat 1. Correspondingly, there are also two turntable bushings 4, respectively the left turntable bushing 4 and the right turntable bushing 4. The connecting pin 3 passes through the boom connecting seat 2 and the two turntable connecting seats 1 along the left-right direction. In this application, "radial" refers to any direction in a plane perpendicular to the straight line extending along the left-right direction, including the up-down direction and the front-back direction; wherein, the specific directions of the left-right direction, up-down direction, and front-back direction are shown by the arrows in the accompanying drawings.

[0024] like Figure 3 As shown, in some embodiments, the first limiting plate 6 includes a circular limiting part 61 and a locking part 62 that protrudes radially from the outer peripheral wall of the circular limiting part 61. The outer diameter of the circular limiting part 61 is larger than the outer diameter of the turntable bushing 4, and the locking part 62 is used for limiting connection with the turntable connecting seat 1.

[0025] Taking the limiting cooperation between the first limiting plate 6 and the left turntable connecting seat 1 as an example, specifically, after the connecting pin 3 passes through the boom connecting seat 2 and the turntable connecting seat 1, the circular limiting part 61 completes the limiting in the left and right directions by the limiting connection between the locking part 62 and the left turntable connecting seat 1, so that the connecting pin 3 cannot move to the right, and at the same time, the left turntable bushing 4 cannot move to the left, thereby preventing the left turntable bushing 4 from moving outward, and installing and positioning the connecting pin 3.

[0026] Furthermore, the circular limiting part 61 is welded to the connecting pin 3, so that the first limiting plate 6 does not need to be installed after the connecting pin 3 passes through the boom connecting seat 2 and the turntable connecting seat 1, thereby saving assembly steps and improving assembly efficiency. Furthermore, the connecting structure 100 also includes a pin seat 8 mounted on the turntable connecting seat 1. The pin seat 8 has a insertion recess 81 formed on it. The locking part 62 is inserted into the insertion recess 81. The connecting structure 100 also includes a pressure plate 9 for axially connecting with the pin seat 8.

[0027] Specifically, the insertion recess 81 extends through the pin seat 8 in the left-right direction and is open upwards. The length of the pressure plate 9 in the front-back direction is greater than the width of the insertion recess 81 in the front-back direction. The pressure plate 9 is detachably connected to the pin seat 8. After the connecting pin 3 passes through the boom connecting seat 2 and the turntable connecting seat 1, the circular limiting part 61 is located above the pin seat 8. The locking part 62 enters the insertion recess 81 from left to right as the connecting pin 3 moves. The pin seat 8 limits the locking part 62 in the front-back direction. Connecting the pressure plate 9 to the pin seat 8 then seals the insertion recess 81 from the left, thereby limiting the locking part 62 in the left-right direction. Since the connecting pin 3 cannot move up and down after passing through the boom connecting seat 2 and the turntable connecting seat 1, the first limiting plate 6 connected to the connecting pin 3 also cannot move up and down. In summary, the locking part 62 is locked, thus locking the first limiting plate 6.

[0028] The first limiting plate 6 can be in the shape of a "bottle opener" or other shapes. This is only an example and does not limit the scope of protection of this application.

[0029] like Figure 4 As shown, in some embodiments, the second limiting plate 7 includes an annular limiting portion 71 and a circular connecting portion 72 connected to the end face of the annular limiting portion 71. The annular limiting portion 71 is used to limit the engagement with the turntable bushing 4 along the axial direction, and the circular connecting portion 72 is used to limit the connection with the connecting pin 3.

[0030] Taking the limiting cooperation between the second limiting plate 7 and the right turntable connecting seat 1 as an example, specifically, after the connecting pin 3 passes through the boom connecting seat 2 and the turntable connecting seat 1, the circular limiting part 71 is limited to the right end of the connecting pin 3 through the circular connecting part 72 to complete the limiting in the left and right direction, so that the connecting pin 3 cannot move to the left, and at the same time, the right turntable bushing 4 cannot move to the right, thereby preventing the right turntable bushing 4 from moving outward, and installing and positioning the connecting pin 3.

[0031] Furthermore, the circular connecting part 72 is provided with multiple connecting holes, the right end of the connecting pin 3 is provided with multiple threaded grooves, and the connecting structure 100 also includes a connecting bolt for connecting the connecting holes and the threaded grooves.

[0032] Those skilled in the art will understand that the circular limiting part 71 can also be connected to the turntable connecting seat 1, and the circular connecting part 72 can limit the connecting pin 3. Specifically, the circular limiting part 71 is provided with a connecting hole, and correspondingly, the turntable connecting seat 1 is provided with a threaded groove. This implementation method is also within the protection scope of this application.

[0033] In some embodiments, the connecting structure 100 further includes an adjusting shim 10 located between the turntable connecting seat 1 and the boom connecting seat 2, the adjusting shim 10 being sleeved on the connecting pin 3. Since there are two turntable connecting seats 1, there are also two adjusting shims 10. Specifically, the adjusting shim 10 can be inserted into the gap between the turntable connecting seat 1 and the boom connecting seat 2 to avoid direct friction between the turntable connecting seat 1 and the boom connecting seat 2 during operation, thereby extending the service life of the turntable connecting seat 1 and the boom connecting seat 2.

[0034] In some embodiments, the connecting structure 100 further includes a dustproof ring 11 located between the turntable bushing 4 and the boom bushing 5, the dustproof ring 11 being fitted onto the connecting pin 3. Since there are two turntable connecting seats 1, there are also two dustproof rings 11. Specifically, the dustproof ring 11 is used to prevent particulate matter from entering the boom bushing 5 and the turntable bushing 4 and damaging the connecting pin 3, the boom bushing 5, and the turntable bushing 4, thereby extending the service life of the connecting pin 3, the boom bushing 5, and the turntable bushing 4.

[0035] Furthermore, the dust seal 11 is clamped between the adjusting shim 10 and the boom bushing 5 to prevent the dust seal 11 from moving.

[0036] In some embodiments, the boom connecting seat 2 is provided with an injection hole 21 that penetrates the boom connecting seat 2, so as to replenish lubricating oil to the boom bushing 5, thereby extending the service life of the connecting pin 3 and the boom bushing 5.

[0037] A specific embodiment of this application also provides an engineering machinery device, including the connection structure 100 described above. Since the engineering machinery device employs all embodiments of the connection structure 100 described above, it possesses all the beneficial effects brought about by the connection structure 100.

[0038] The engineering machinery and equipment mentioned in this application include excavators, bulldozers, etc.

[0039] 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.

[0040] 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.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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.

[0042] 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 between a boom and a turntable, characterized in that, The connection structure (100) includes: Turntable connecting seat (1), boom connecting seat (2) and connecting pin (3). The turntable connecting seat (1) is installed on the turntable, the boom connecting seat (2) is installed on the boom, and the connecting pin (3) is used to connect the turntable connecting seat (1) and the boom connecting seat (2). Turntable bushing (4) is embedded in the connecting hole of the turntable connecting seat (1) and sleeved on the connecting pin (3); The boom bushing (5) is embedded in the connecting hole of the boom connecting seat (2) and sleeved on the connecting pin (3); The first limiting plate (6) and the second limiting plate (7) are located at the two ends of the connecting pin (3) and are used to limit the engagement with the turntable bushing (4) along the axial direction.

2. The connection structure according to claim 1, characterized in that, The first limiting plate (6) includes a circular limiting part (61) and a locking part (62) that protrudes radially from the outer peripheral wall of the circular limiting part (61). The outer diameter of the circular limiting part (61) is larger than the outer diameter of the turntable bushing (4). The locking part (62) is used to limit the connection with the turntable connecting seat (1).

3. The connection structure according to claim 2, characterized in that, The circular limiting part (61) is welded to the connecting pin (3).

4. The connection structure according to claim 2, characterized in that, The connecting structure (100) further includes a pin seat (8) mounted on the turntable connecting seat (1), the pin seat (8) having a insertion recess (81) formed thereon, the locking part (62) being inserted into the insertion recess (81), and the connecting structure (100) further includes a pressure plate (9) for axial connection with the pin seat (8).

5. The connection structure according to claim 1, characterized in that, The second limiting plate (7) includes an annular limiting part (71) and a circular connecting part (72) connected to the end face of the annular limiting part (71). The annular limiting part (71) is used to limit and cooperate with the turntable bushing (4) along the axial direction, and the circular connecting part (72) is used to limit and connect with the connecting pin (3).

6. The connection structure according to claim 5, characterized in that, The circular connecting part (72) has multiple connecting holes, the end of the connecting pin (3) has multiple threaded grooves, and the connecting structure (100) also includes a connecting bolt for connecting the connecting holes and the threaded grooves.

7. The connection structure according to claim 1, characterized in that, The connection structure (100) further includes an adjusting shim (10) located between the turntable connecting seat (1) and the boom connecting seat (2), the adjusting shim (10) being sleeved on the connecting pin (3).

8. The connection structure according to claim 7, characterized in that, The connecting structure (100) also includes a dustproof ring (11) located between the turntable bushing (4) and the boom bushing (5), and the dustproof ring (11) is sleeved on the connecting pin (3).

9. The connection structure according to claim 8, characterized in that, The dustproof ring (11) is sandwiched between the adjusting shim (10) and the boom bushing (5).

10. An engineering machinery equipment, characterized in that, Includes the connection structure (100) according to any one of claims 1 to 9.

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