Connecting pin shaft protection device, boom and crawler crane

Abstract

The utility model discloses a connecting pin shaft protection device, an arm support and a crawler crane in the technical field of crane arm supports, and aims to solve the problems that the connecting pin shaft protection device in the prior art is difficult to ensure the flexible disassembly and assembly of a connecting pin shaft while ensuring the safety of the connecting pin shaft, and the convenience of the device is influenced. The device comprises a support and a movable plate, a first pin shaft hole, a second pin shaft hole and a third pin shaft hole are formed in the top of the support, a first through hole and a second through hole are formed in the top of the support, the same first pin shaft is movably connected into the first through hole and the first pin shaft hole, and a second pin shaft is movably connected into the second through hole; the connecting pin shaft is suitable for the arm support, the relative position of the support and the movable plate can be adjusted, whether the movable plate is located on one side of the connecting pin shaft or not can be flexibly adjusted according to actual work requirements, and therefore the connecting pin shaft can be flexibly disassembled and assembled while the safety of the connecting pin shaft is guaranteed.

Description

Technical Field

[0001] The utility model relates to a connecting pin shaft protection device, a boom and a crawler crane, belonging to the technical field of crane booms. Background Art

[0002] Crawler crane booms usually require pins to connect. Currently, the boom pins on most crawler crane booms are fixed by shoulders and clips. Under normal working conditions, the boom pin hole is parallel to the ground, and there is no risk of the pin falling. In some cases, some booms may need to be rotated 90° for operation. At this time, the boom pin hole is perpendicular to the ground, and the pin is vertically downward. Under the action of gravity, there is a risk of falling, which poses a safety hazard. Crane booms usually lack connecting pin protection devices. When the boom is rotated 90° and the boom pin hole is perpendicular to the ground, there is a risk of the connecting pin falling, affecting the safety of the device. Usually, a connecting pin protection device is required to protect the connecting pin.

[0003] The prior art CN216842569U provides a new practical device for axial positioning of a pin shaft, which limits the connecting pin shaft by cooperating with a B-type pin shaft and a cotter pin to prevent the connecting pin shaft from falling. However, when the connecting pin shaft needs to be disassembled, the B-type pin shaft needs to be disassembled. The disassembly work is relatively complicated, and it is difficult to ensure the safety of the connecting pin shaft while ensuring the flexible disassembly and assembly of the connecting pin shaft, which affects the convenience of the device. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide a connecting pin shaft protection device, a boom and a crawler crane, so as to solve the problem that the existing connecting pin shaft protection device is difficult to ensure the safety of the connecting pin shaft while ensuring the flexible disassembly and assembly of the connecting pin shaft, thus affecting the convenience of the device.

[0005] In order to solve the above technical problems, the utility model is implemented by adopting the following technical solutions:

[0006] In the first aspect, the utility model provides a connecting pin shaft protection device, including a bracket and a movable plate, wherein the bracket is provided with a first pin shaft hole, a second pin shaft hole and a third pin shaft hole on the top, and the movable plate is provided with a first through hole and a second through hole on the top, the first through hole and the first pin shaft hole are movably connected with the same first pin shaft, the second through hole is movably connected with a second pin shaft, and one end of the second pin shaft extends to the inner side of the second pin shaft hole or the third pin shaft hole.

[0007] Furthermore, the first pin shaft includes a first column and a first mounting block disposed at one end of the first column, and a diameter of the first mounting block is greater than a diameter of the first through hole.

[0008] Furthermore, the second pin shaft includes a second column and a second mounting block disposed at one end of the second column, and a diameter of the second mounting block is greater than a diameter of the second through hole.

[0009] Furthermore, a baffle is provided on one side of the outer wall of the movable plate.

[0010] Furthermore, one end of the first column away from the first mounting block is detachably connected with a first clip.

[0011] Furthermore, one end of the second column away from the second mounting block is detachably connected with a second clip.

[0012] In a second aspect, the utility model provides an arm support, comprising the connecting pin protection device described in the first aspect, comprising a main body, a plurality of connecting pins are movably connected to the main body, a third clip is detachably connected to the connecting pin, and the outer wall of the main body is detachably connected to the bracket at one side of the connecting pin;

[0013] When one end of the second pin shaft extends to the inner side of the second pin shaft hole, the movable plate is located on one side of the connecting pin shaft; when one end of the second pin shaft extends to the inner side of the third pin shaft hole, the movable plate is not located on one side of the connecting pin shaft.

[0014] In a third aspect, the utility model provides a crawler crane, comprising the boom described in the second aspect.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The connecting pin shaft protection device cooperates with the second pin shaft through the second pin shaft hole and the third pin shaft hole, and can extend one end of the second pin shaft to the inner side of the second pin shaft hole or the third pin shaft hole, so as to adjust the relative position of the bracket and the movable plate, and can flexibly adjust whether the movable plate is located on one side of the connecting pin shaft according to actual work needs, thereby ensuring the safety of the connecting pin shaft while realizing flexible disassembly and assembly of the connecting pin shaft, ensuring the convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the movable plate provided according to the embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the top view of the structure of the bracket provided according to the embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the main body provided according to an embodiment of the utility model;

[0020] Figure 4 yes Figure 3The enlarged schematic diagram of point A in the middle;

[0021] Figure 5 yes Figure 3 The enlarged schematic diagram of point B in the middle;

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the arm provided according to an embodiment of the utility model.

[0023] In the figure: 1, bracket; 2, movable plate; 3, first pin shaft hole; 4, second pin shaft hole; 5, third pin shaft hole; 6, first through hole; 7, second through hole; 8, first pin shaft; 9, second pin shaft; 10, baffle; 11, first column; 12, first mounting block; 13, second column; 14, second mounting block; 15, first clip; 16, second clip; 17, main body; 18, connecting pin shaft. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0027] Embodiment 1:

[0028] like Figure 1-2 As shown, the utility model provides a connecting pin protection device, including a bracket 1 and a movable plate 2, the bracket 1 is provided with a first pin hole 3, a second pin hole 4 and a third pin hole 5 on the top, the movable plate 2 is provided with a first through hole 6 and a second through hole 7 on the top, the first through hole 6 and the first pin hole 3 are movably connected with the same first pin 8, the second through hole 7 is movably connected with a second pin 9, and one end of the second pin 9 extends to the inner side of the second pin hole 4 or the third pin hole 5.

[0029] Specifically, during work, the bracket 1 can be installed on the arm and be located on one side of the connecting pin 18 to be protected. When the connecting pin 18 on the arm needs to be limited and protected, the first pin 8 is simultaneously located inside the first through hole 6 and the first pin hole 3, and plays a supporting role in the rotation of the movable plate 2. The movable plate 2 is manually rotated until the movable plate 2 and the bracket 1 are in the same straight line, and the second pin hole 4 is aligned with the second through hole 7. At this time, one end of the second pin 9 is extended to the inside of the second pin hole 4. At this time, the second pin 9 is simultaneously located inside the second through hole 7 and the second pin hole 4. The first pin 8 cooperates with the second pin 9 to fix the relative position of the bracket 1 and the movable plate 2. At this time, one end of the movable plate 2 is located on one side of the connecting pin 18. The pin 18 acts as a barrier to prevent the connecting pin 18 from falling, thereby ensuring the safety of the device; when it is necessary to disassemble the connecting pin 18 on the arm, the second pin 9 can be taken out from the second pin hole 4, and the movable plate 2 can be driven to rotate until the second through hole 7 is aligned with the third pin hole 5, and one end of the second pin 9 is extended to the inside of the third pin hole 5, and the first pin 8 cooperates with the second pin 9 to fix the relative position of the bracket 1 and the movable plate 2. At this time, the movable plate 2 is not located on one side of the connecting pin 18, and the connecting pin 18 can be disassembled and assembled, thereby ensuring the convenience of the device; a baffle 10 is provided on one side of the outer wall of the movable plate 2, and the baffle 10 replaces the movable plate 2 to play a blocking role for the connecting pin 18, thereby ensuring the stability of the device during operation.

[0030] The utility model cooperates with the second pin shaft hole 4, the third pin shaft hole 5 and the second pin shaft 9, so that one end of the second pin shaft 9 can be extended to the inner side of the second pin shaft hole 4 or the third pin shaft hole 5, thereby adjusting the relative position of the bracket 1 and the movable plate 2, and can flexibly adjust whether the movable plate 2 is located on the side of the connecting pin shaft 18 according to actual working needs, thereby ensuring the safety of the connecting pin shaft 18 while realizing the flexible disassembly and assembly of the connecting pin shaft 18, ensuring the convenience of the device.

[0031] like Figure 2As shown, in one embodiment, the first pin shaft 8 includes a first column 11 and a first mounting block 12 arranged at one end of the first column 11, the diameter of the first mounting block 12 is larger than the diameter of the first through hole 6, the second pin shaft 9 includes a second column 13 and a second mounting block 14 arranged at one end of the second column 13, the diameter of the second mounting block 14 is larger than the diameter of the second through hole 7, the first column 11 is detachably connected to the end away from the first mounting block 12 with a first clip 15, and the second column 13 is detachably connected to the end away from the second mounting block 14 with a second clip 16.

[0032] Specifically, the diameter of the first column 11 is slightly smaller than the diameter of the first through hole 6, and the diameter of the second column 13 is slightly smaller than the diameter of the second through hole 7. The first mounting block 12 is used to prevent the first column 11 from detaching from the first through hole 6, and the second mounting block 14 is used to prevent the second column 13 from detaching from the second through hole 7, thereby ensuring the safety of the device. After the first column 11 is installed on the inner side of the first through hole 6 and the first pin shaft hole 3, the first clip 15 is installed on the first column 11, and the first clip 15 cooperates with the first mounting block 12 to ensure the stability of the first column 11 during installation. At the same time, the second clip 16 cooperates with the second mounting block 14 to ensure the stability of the second column 13 during installation, thereby preventing the first column 11 and the second column 13 from falling off, thereby ensuring the stability of the device during operation.

[0033] Embodiment 2:

[0034] like Figure 3-5 As shown, the utility model provides an arm support, including the connecting pin shaft protection device described in Example 1, including a main body 17, a plurality of connecting pin shafts 18 are movably connected to the main body 17, a third clip is detachably connected to the connecting pin shaft 18, and the outer wall of the main body 17 is detachably connected to the bracket 1 on one side of the connecting pin shaft 18; when one end of the second pin shaft 9 extends to the inner side of the second pin shaft hole 4, the movable plate 2 is located on one side of the connecting pin shaft 18, and when one end of the second pin shaft 9 extends to the inner side of the third pin shaft hole 5, the movable plate 2 is not located on one side of the connecting pin shaft 18.

[0035] Specifically, the main body 17 and the bracket 1 are connected by welding, and the bracket 1 is located on one side of the connecting pin 18. The relative position of the movable plate 2 and the bracket 1 can be adjusted by adjusting one end of the second pin 9 to be located on the inner side of the second pin hole 4 or the third pin hole 5, so that the movable plate 2 is located on or not located on one side of the connecting pin 18. While ensuring the safety of the connecting pin 18, the flexible disassembly and assembly of the connecting pin 18 is achieved, thereby ensuring the convenience of the device; the third clip is used to ensure the stability of the connecting pin 18 during operation.

[0036] like Figure 6As shown, in one embodiment, when the arm frequently needs to be flipped 90°, a bracket 1 may be provided on one side of each connecting pin 18 on the main body 17, and according to actual work needs, a movable plate 2 may be installed on the bracket 1 on the side of the connecting pin 18 that needs to be protected through the first pin 8 and the second pin 9, without the need to install the movable plate 2 on all the brackets 1 on the side of the connecting pin 18, thereby saving materials and facilitating disassembly and assembly of the device.

[0037] Embodiment three:

[0038] The utility model provides a crawler crane, comprising the boom described in the second embodiment.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A connecting pin protection device, characterized in that: The invention comprises a bracket (1) and a movable plate (2), wherein the bracket (1) is provided with a first pin shaft hole (3), a second pin shaft hole (4) and a third pin shaft hole (5) at the top, and the movable plate (2) is provided with a first through hole (6) and a second through hole (7) at the top, wherein the first through hole (6) and the first pin shaft hole (3) are movably connected with a first pin shaft (8), and the second through hole (7) is movably connected with a second pin shaft (9), and one end of the second pin shaft (9) extends to the inside of the second pin shaft hole (4) or the third pin shaft hole (5).

2. The connecting pin protection device according to claim 1, characterized in that: The first pin shaft (8) comprises a first column (11) and a first mounting block (12) arranged at one end of the first column (11); the diameter of the first mounting block (12) is greater than the diameter of the first through hole (6).

3. The connecting pin protection device according to claim 1, characterized in that: The second pin shaft (9) comprises a second column (13) and a second mounting block (14) arranged at one end of the second column (13); the diameter of the second mounting block (14) is greater than the diameter of the second through hole (7).

4. The connecting pin protection device according to claim 1, characterized in that: A baffle (10) is provided on one side of the outer wall of the movable plate (2).

5. The connecting pin protection device according to claim 2, characterized in that: One end of the first column (11) away from the first mounting block (12) is detachably connected to a first clip (15).

6. The connecting pin protection device according to claim 3, characterized in that: One end of the second column (13) away from the second mounting block (14) is detachably connected to a second clip (16).

7. A boom, comprising the connecting pin protection device according to any one of claims 1 to 6, characterized in that: It comprises a main body (17), a plurality of connecting pins (18) are movably connected to the main body (17), a third clip is detachably connected to the connecting pin (18), and the outer wall of the main body (17) is detachably connected to the bracket (1) at one side of the connecting pin (18); When one end of the second pin shaft (9) extends to the inner side of the second pin shaft hole (4), the movable plate (2) is located on one side of the connecting pin shaft (18); when one end of the second pin shaft (9) extends to the inner side of the third pin shaft hole (5), the movable plate (2) is not located on one side of the connecting pin shaft (18).

8. A crawler crane, characterized in that: Including the arm support as described in claim 7.

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