Transportation fixing device, propeller strut and crawler crane

Abstract

The utility model discloses a transportation fixing device, a propeller strut and a crawler crane in the technical field of crawler cranes, and aims to solve the problem of improper arrangement of a movable pulley in a fixed variable-amplitude pulley block in the prior art. The connecting piece comprises a connecting part and a fixing part; the fixing part comprises a supporting crank arm, a fixing seat and a fixing curved buckle; the front end of the supporting crank arm is rotationally connected to the connecting part, and the rear end of the supporting crank arm is fixedly connected with the fixed seat; a limiting piece is arranged on the connecting part and used for limiting the supporting crank arm rotating to the horizontal position or the vertical position; the two ends of the fixing curved buckle are detachably connected to the fixing base and used for fixing a movable pulley. The variable-amplitude pulley block is suitable for the crawler crane, and is used for fixing the movable pulley in the variable-amplitude pulley block in the transportation process, so that the safety of parts in the transportation process is ensured.

Description

Technical Field

[0001] The utility model relates to a transport fixing device, a herringbone frame and a crawler crane, belonging to the technical field of crawler cranes. Background Art

[0002] Corresponding reference Figure 7 and Figure 6 In the prior art, the luffing system of a general crawler crane generally uses a luffing pulley block in conjunction with a herringbone frame or mast to complete the luffing action of the crawler crane's herringbone frame through steel wire ropes. The luffing pulley block generally includes a movable pulley block and a fixed pulley block. The fixed pulley is usually connected and fixed to the main structure of the herringbone frame using a pulley shaft, while the movable pulley needs to be installed and fixed on the fixing device on the herringbone frame to prevent the pulley block from slipping due to vehicle vibration during transportation.

[0003] The structural design of the pulley frame of a luffing pulley block is often affected by the limited space structure, such as the span size of the luffing wire rope of the crane arm and the span of the main arm anti-tilt buffer rod. As a result, the span of the fixed points on the pulley frame of the movable pulley block may not match the span of the A-frame main beam. When the span of the fixed points on the pulley frame is less than the innermost span of the A-frame main beam, the pulley block often cannot be effectively fixed, which poses a problem for the transportation of the pulley block on the A-frame.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in this field. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a transport fixing device, a herringbone frame and a crawler crane, which have a simple structure, are easy to manufacture, and are convenient to use and fix. When in use, the support crank arm is rotated to a horizontal state to fix the movable pulley block to prevent it from slipping. When the movable pulley block is in use, the support crank arm is rotated to fold and retract, thereby avoiding interference with the transport fixing device during operation.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] In the first aspect, the utility model provides a transport fixing device, comprising a connecting part and a fixing part; the fixing part comprises a supporting crank arm, a fixing seat and a fixing curved buckle; the front end of the supporting crank arm is rotatably connected to the connecting part, and the rear end is fixedly connected to the fixing seat; a limiting member is provided on the connecting part for limiting the horizontal or vertical position of the supporting crank arm; the two ends of the fixing curved buckle are respectively detachably connected to the fixing seat for fixing the movable pulley.

[0008] Furthermore, the connecting part includes a welded fixing plate spaced apart on the left and right sides; the limiting part includes a first pin shaft, a second pin shaft, a cotter pin, an upper fixing hole and a lower rotating hole; the upper fixing hole and the lower rotating hole are arranged on the welded fixing plate from top to bottom; so the first pin shaft passes through the lower rotating hole and the supporting curved arm and is fixed by the cotter pin; when the supporting curved arm rotates to a horizontal state or a vertical state around the first pin shaft, the second pin shaft passes through the supporting curved arm and the upper fixing hole to limit the horizontal or vertical state.

[0009] Furthermore, the support crank arm is respectively provided with a rotation matching hole, a vertical fixing hole and a horizontal fixing hole; the first pin shaft passes through the lower rotation hole and the rotation matching hole and is fixed by a clip; the second pin shaft passes through the vertical fixing hole and the upper fixing hole to realize the vertical setting state of the support crank arm, or the second pin shaft passes through the horizontal fixing hole and the upper fixing hole to realize the horizontal setting state of the support crank arm.

[0010] Furthermore, the fixing seat includes a support plate and a slot seat; the slot seat is arranged on the support plate; the slot seat includes an integrally formed connecting section and a U-shaped limiting fixing groove; two connecting sections are respectively extended outward on both sides of the U-shaped limiting fixing groove, and a first connecting hole is opened on the connecting section; second connecting holes are respectively provided at both ends of the fixing buckle; after the third pin shaft passes through the first connecting hole and the second connecting hole, it is fixed with a clip.

[0011] Furthermore, the fixing seat also includes a baffle; the baffle is arranged on the supporting plate and is in contact with the outer side of the U-shaped limiting fixing groove.

[0012] Furthermore, the height of the baffle is not higher than the height of the U-shaped limiting fixing groove.

[0013] In a second aspect, the utility model provides an A-frame, comprising a main beam and a transport fixing device as described above; the fixing portion is rotatably connected to the main beam through the connecting portion, and is used to cooperate with the movable pulley of the variable amplitude pulley group to limit the fixation.

[0014] In a third aspect, the utility model provides a crawler crane, comprising a luffing pulley block and a herringbone frame as described above, which are arranged on a main machine; the herringbone frame is fixed to the main machine via a pull plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The utility model provides a transportation fixing device, whose connecting part can be fixed on the A-frame, and the supporting crank arm in the matched fixing part rotates around the connecting part, and the limiting piece auxiliary supports the supporting crank arm to be limited to a horizontal position or a vertical position. When the supporting crank arm is in a working state, the limiting piece cooperates with the supporting crank arm to be in a horizontal state, and fixes the movable pulley in the variable-length pulley group between the fixed crank buckle and the fixed seat, thereby avoiding the movable pulley from sliding back and forth during transportation, and ensuring the safe transportation of the variable-length pulley group; the transportation fixing device has a simple overall structure and is easy to manufacture and produce.

[0017] Among them, the limiting parts are provided on the welding fixing plate with a first pin, a second pin, an upper fixing hole and a lower rotating hole. The first pin is assembled with the lower rotating hole to cooperate with the support crank arm to rotate and connect; when the support crank arm rotates to a horizontal state or a vertical state around the first pin, the second pin passes through the support crank arm and the upper fixing hole to achieve horizontal or vertical limiting. The limiting parts have a simple structure and are easy to operate and install. The U-shaped limiting fixing groove on the fixing seat is used to cooperate with the fixed handle of the movable pulley, and the third pin fixes the connecting section of the fixed buckle and the fixing seat, so that the movable pulley is fixed in the fixing seat to prevent the movable pulley from moving forward and backward during transportation; a baffle is provided on one side of the U-shaped limiting fixing groove, which can limit the movable pulley in the axial direction to prevent the movable pulley from moving left and right during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a transport fixing device provided by the utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of part of the structure;

[0020] Figure 3 yes Figure 2 Disassembly diagram;

[0021] Figure 4 yes Figure 1 Schematic diagram of usage status;

[0022] Figure 5 yes Figure 1 Schematic diagram of the structure in a non-use state;

[0023] Figure 6 Schematic diagram of the existing luffing pulley set fixed on the bottom boom and transported along with the whole machine;

[0024] Figure 7 It is a schematic diagram of the use of an existing fixing device for fixing a luffing pulley block;

[0025] In the figure: 1. Supporting crank arm; 2. Fixing seat; 3. Fixing buckle; 4. Welding fixing plate; 5. First pin; 6. Second pin; 7. Split pin; 8. Upper fixing hole; 9. Lower rotating hole; 10. Rotation matching hole; 11. Vertical fixing hole; 12. Horizontal fixing hole; 13. Support plate; 14. Connecting section; 15. U-shaped limiting fixing groove; 16. First connecting hole; 17. Second connecting hole; 18. Third pin; 19. Baffle; 20. Clip; 21. A-frame; 22. Main beam; 23. Pull plate; 24. Crawler crane; 25. Fixing handle; 26. Boom pulley block. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention.

[0027] The utility model provides a transport fixing device, comprising a connecting portion and a fixing portion. The fixing portion comprises a supporting crank arm, a fixing seat and a fixing buckle. The front end of the supporting crank arm is rotatably connected to the connecting portion, and the rear end of the supporting crank arm is fixedly connected to the fixing seat. The connecting portion is fixedly arranged on the required matching equipment component. A limiting member is provided on the connecting portion, and the limiting member is used to limit the rotation of the supporting crank arm to a horizontal position or a vertical position. The two ends of the fixing buckle are detachably connected to the fixing seat respectively, and are used to limit the movable pulley. The specific implementation is as follows: Example 1

[0028] Combine Figures 1 to 5 As shown, this embodiment provides a specific connection portion and fixing portion. The connection portion includes two welded fixing plates 4, which are spaced apart from each other. The limiting members on the connection portion include a first pin 5, a second pin 6, a cotter pin 7, an upper fixing hole 8, and a lower rotation hole 9. The upper fixing hole 8 and the lower rotation hole 9 are arranged on the welded fixing plate 4 from top to bottom. After the first pin 5 passes through the lower rotation hole 9 and the support crank 1, the cotter pin 7 is used to secure the first pin 5, so that the support crank 1 is rotatably connected to the welded fixing plate 4. When the support crank 1 rotates to a horizontal position around the first pin 5, the second pin 6 passes through the support crank 1 and the upper fixing hole 8 and cooperates with the clip 20 to secure it, so that the support crank 1 is in a horizontal position. Alternatively, when the support crank 1 rotates to a vertical position around the first pin 5, the second pin 6 passes through the support crank 1 and the upper fixing hole 8 and cooperates with the clip 20 to secure it, so that the support crank 1 is in a vertical position.

[0029] Corresponding to the above, Figure 2 and Figure 3The support crank arm 1 is provided with a rotation matching hole 10, a vertical fixing hole 11 and a horizontal fixing hole 12. The first pin 5 passes through the lower rotation hole 9 and the rotation matching hole 10, and is fixed with a clip 20 to enable the support crank arm 1 to rotate around the connection part. Figure 5 As shown, the second pin 6 passes through the vertical fixing hole 11 and the upper fixing hole 8, and is fixed with a clip 20 to achieve a vertical setting state of the supporting crank arm 1. Figure 4 As shown, the second pin shaft 6 passes through the horizontal fixing hole 12 and the upper fixing hole 8 to achieve the horizontal setting state of the supporting crank arm 1.

[0030] like Figure 2 The fixing seat 2 includes a support plate 13 and a slot seat. The slot seat is set on the support plate 13. The slot seat includes an integrally formed connecting section 14 and a U-shaped limiting fixing groove 15. Two connecting sections 14 extend outward on both sides of the U-shaped limiting fixing groove 15. That is, there are four connecting sections 14 in total, and each connecting section 14 is provided with a first connecting hole 16, and correspondingly, second connecting holes 17 are provided at both ends of the fixed buckle 3. When assembling the fixed buckle 3, the third pin 18 is passed through the first connecting hole 16 and the second connecting hole 17 respectively. When fixing the movable pulley, the pin at one end of the fixed buckle 3 can be removed, or after removing the pins at both ends of the fixed buckle 3, the U-shaped limiting fixing groove 15 is placed in the fixed handle 25 of the movable pulley, and then the third pin 18 is used to fix the fixed buckle 3, so that the movable pulley is limited between the U-shaped limiting fixing groove 15 and the fixed buckle 3.

[0031] Optional, such as Figure 2 and Figure 3 The fixing seat 2 also includes a baffle 19, which is fixed on the support plate 13 and is in contact with the outer side of the U-shaped limit fixing groove 15. The outer side of the U-shaped limit fixing groove 15 refers to the side close to the connection part. The U-shaped limit fixing groove 15 is used to prevent the movable pulley from sliding back and forth during transportation. The height of the baffle 19 is not higher than the height of the U-shaped limit fixing groove 15. During transportation, when the movable pulley is too tightly stuck with the U-shaped limit fixing groove 15 due to the action of external force, the height setting of the baffle 19 can facilitate external tools to act on the inside of the baffle to assist in lifting the fixed handle 25 of the movable pulley; in addition, during transportation, the baffle 19 also effectively prevents the fixed handle 25 of the movable pulley from moving left and right (moving along the axial direction of the movable pulley) during transportation. Example 2

[0032] This embodiment provides a herringbone frame 21, combined with Figure 4 and Figure 5, comprising a main beam 22 and a transport securing device as described in any of the first embodiments above. The securing portion of the transport securing device is rotatably connected to the main beam 22 via a connecting portion, and is secured in conjunction with the movable pulley of the luffing pulley assembly 26. The herringbone frame 21 of this embodiment employs the transport securing device described in the first embodiment, and the technical effects produced are consistent with those of the first embodiment, and are not further elaborated upon. Example

[0033] Combine Figure 6 This embodiment provides a crawler crane 24 comprising a mainframe, a luffing pulley block 26, and the herringbone frame 21 described in the second embodiment. The herringbone frame 21 is mounted on the mainframe via a pull plate 23. The luffing pulley block 26 is mounted on the mainframe according to actual needs, wherein the movable pulley in the luffing pulley block 26 can be fixed to the transport fixture on the herringbone frame 21 according to the specific operating state of the crawler crane 24. This embodiment utilizes the herringbone frame 21 described in the second embodiment, and its technical effects are the same as those produced by the second embodiment, and the details will not be repeated here.

[0034] In the description of the present invention, 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. 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 the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] 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 scope of protection of the present invention.

Claims

1. A transport fixing device, characterized in that: It includes a connecting part and a fixing part; the fixing part includes a supporting curved arm, a fixing seat and a fixing curved buckle; the front end of the supporting curved arm is rotatably connected to the connecting part, and the rear end is fixedly connected to the fixing seat; a limiting member is provided on the connecting part, which is used to limit the rotation of the supporting curved arm to a horizontal position or a vertical position; the two ends of the fixing curved buckle are respectively detachably connected to the fixing seat for fixing the movable pulley.

2. The transport fixing device according to claim 1, characterized in that: The connecting part includes a welding fixing plate arranged at intervals on the left and right; the limiting part includes a first pin shaft, a second pin shaft, a cotter pin, an upper fixing hole and a lower rotating hole; the upper fixing hole and the lower rotating hole are arranged on the welding fixing plate from top to bottom; so the first pin shaft passes through the lower rotating hole and the supporting curved arm and is fixed by the cotter pin; when the supporting curved arm rotates to a horizontal state or a vertical state around the first pin shaft, the second pin shaft passes through the supporting curved arm and the upper fixing hole to limit the horizontal or vertical state.

3. The transport fixing device according to claim 2, characterized in that: The support crank arm is respectively provided with a rotation matching hole, a vertical fixing hole and a horizontal fixing hole; the first pin shaft passes through the lower rotation hole and the rotation matching hole and is fixed by a clip; the second pin shaft passes through the vertical fixing hole and the upper fixing hole to realize the vertical setting state of the support crank arm, or the second pin shaft passes through the horizontal fixing hole and the upper fixing hole to realize the horizontal setting state of the support crank arm.

4. The transport fixing device according to claim 1 or 2, characterized in that: The fixing seat includes a support plate and a slot seat; the slot seat is arranged on the support plate; the slot seat includes an integrally formed connecting section and a U-shaped limiting fixing groove; two connecting sections are respectively extended outward on both sides of the U-shaped limiting fixing groove, and a first connecting hole is opened on the connecting section; second connecting holes are respectively provided at both ends of the fixing buckle; after the third pin shaft passes through the first connecting hole and the second connecting hole, it is fixed with a clip.

5. The transport fixing device according to claim 4, characterized in that: The fixing seat also includes a baffle; the baffle is arranged on the supporting plate and is in contact with the outer side of the U-shaped limiting fixing groove.

6. The transport fixture according to claim 1, wherein: The height of the baffle is not higher than the height of the U-shaped limiting fixing groove.

7. A herringbone frame, characterized in that: It comprises a main beam and a transport fixing device according to any one of claims 1 to 6; the fixing portion is rotatably connected to the main beam through the connecting portion, and is used to cooperate with the movable pulley of the variable amplitude pulley group to limit the fixation.

8. A crawler crane, characterized in that: It comprises a variable amplitude pulley set arranged on a main machine and the herringbone frame as claimed in claim 7; the herringbone frame is fixed to the main machine through a pull plate.

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