Fixing tool applied to crane jib

Abstract

According to the fixing tool applied to the crane jib, before the jib is transported, the first fixing piece is placed between the connecting lugs, and the mounting holes in the connecting lugs of the first fixing piece are coaxial, so that the two ends of the fixing shaft penetrate through the mounting holes and transversely penetrate through the connecting lugs, and the fixing piece is fixed to the first fixing piece. In this way, the first fixing piece is connected to the fixing shaft in a sleeving mode, then the fastening pieces penetrate through the second fixing pieces to be in threaded connection with the counterbores in the two ends of the fixing shaft, the fixing shaft is fixed to the connecting lugs through the fastening pieces, movement of the fixing shaft in the axis direction is limited through the second fixing pieces, and therefore the connecting lugs are prevented from deforming; and after the suspension arm is transported to a destination, the first fixing piece and the second fixing piece are detached from the connecting lugs, and then the subsequent suspension arm installation is carried out, so that the suspension arm installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of crane booms, and particularly relates to a fixing tooling applied to a crane boom. Background Art

[0002] In the application of modern industry, cranes are often used in large-scale lifting operations, which are achieved by controlling the rotation and movement of the boom. Before the lifting operation, the assembled boom needs to be transported to the destination and installed on the slewing platform. For example, Figure 1 For the processed and assembled boom, Figure 2 For the root connecting ear of the boom, a processed pin hole 5' is provided on the connecting ear. The boom can be installed on the slewing platform by passing a pin through the pin hole. However, during the transportation of the boom, due to objective factors such as vibrations generated by road bumps and uneven forces during installation and lifting, the pin holes on the connecting ears are likely to be deformed, which will cause the pin holes on the two connecting ears not to be in the same plane, that is, the pin holes on the two connecting ears do not meet the coaxial requirement, resulting in the boom being unable to be installed normally during installation. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a fixing tooling applied to a crane boom, which can prevent the connecting ear from being deformed by keeping the root of the boom in a fixed state all the time, facilitating the subsequent installation of the root of the boom.

[0004] To achieve the above purpose, the utility model provides a fixing tooling applied to a crane boom, which is applied to the root of the crane boom and includes a fixed shaft, a first fixing member, two or more second fixing members, and a fastener. The diameter of the fixed shaft matches the installation hole of the connecting ear on the root of the boom. The first fixing member is arranged between the connecting ears and abuts against the inner side of the connecting ears. Both ends of the fixed shaft penetrate through the installation hole. The first fixing member is sleeved on the outer side of the fixed shaft. Two or more second fixing members are fixed in the axial direction of the fixed shaft through fasteners, and both ends of the two second fixing members abut against the two outer side walls of the connecting ears.

[0005] The above settings facilitate the installation of the first fixing member between the connecting ears first, so that the fixing shaft can pass through the mounting holes of the connecting ears, and the first fixing member can be sleeved on the fixing shaft, thereby restricting the movement of the first fixing member in the vertical direction, making the first fixing member abut against the inner side of the connecting ear, so as to limit the position from the inner side of the connecting ear. Then, the fastener passes through the second fixing member to make the second fixing member abut against and limit the position from the outer side of the connecting ear, preventing the connecting ear from deforming outward. In this way, during the transportation of the boom, since the position is limited from the inner side and the outer side of the connecting ear, it can ensure reliable position limitation of the connecting ear at the root of the boom, and prevent the connecting ear from deforming in the axial direction of the mounting hole due to objective factors such as bumps and vibrations, so that the boom meets the installation requirements.

[0006] Further, the second fixing member is provided with through holes matching the fasteners, and both ends of the fixing shaft are provided with countersunk holes matching the fasteners. In the axial direction of the mounting hole, the fastener passes through the through hole to detachably fix the second fixing member on the outer side of the connecting ear.

[0007] The above settings enable the fastener to pass through the mounting hole and be connected to the countersunk hole of the fixing shaft, so that the second fixing member can be connected to the fixing shaft through the fastener, and at the same time make the second fixing member abut against the outer side of the connecting ear, which is convenient for installation.

[0008] Further, the axes of the fixing shaft, the first fixing member, and the second fixing member all coincide with the axis of the mounting hole.

[0009] The above settings ensure that the fixing shaft, the first fixing member, and the second fixing member interact with each other in the axial direction of the mounting hole, so as to limit the position of the connecting ear in the axial direction of the mounting hole.

[0010] Further, the first fixing member is a hollow-structured spacer sleeve, and the diameter of the inner side wall of the first fixing member matches the maximum diameter of the outer side wall of the fixing shaft.

[0011] The above settings facilitate the first fixing member to be sleeved on the outer side surface of the fixing shaft.

[0012] Further, both ends of the first fixing member extend radially outward to form first convex portions.

[0013] The above settings can increase the contact area between the first fixing member and the inner side wall of the connecting ear, so that the first convex portion can reliably abut against the inner side of the connecting ear.

[0014] Further, both ends of the second fixing member extend perpendicularly to the second fixing member outward to form second convex portions, and the second convex portions and the second fixing member form grooves.

[0015] With the above settings, the fixing shaft can be conveniently arranged in the groove through the groove, facilitating the second fixing member to abut against the outer side of the connecting ear through the second convex portion.

[0016] Furthermore, the cross-sectional shape of the second fixing member is U-shaped.

[0017] With the above settings, after the second convex portion abuts against the outer side of the connecting ear, the fixing shaft passing through the mounting hole can be accommodated in the U-shaped groove, avoiding contact with the second fixing member.

[0018] Furthermore, a stepped portion is formed by inwardly recessing the middle part of the fixing shaft along the radial direction, and a chamfered portion is formed between the stepped portion and the outer side surface of the fixing shaft.

[0019] With the above settings, the weight of the fixing shaft can be reduced, facilitating installation. At the same time, the chamfered portion can facilitate the gripping of the fixing shaft and also increase the volume at both ends of the fixing shaft, thereby increasing the connection strength of the fastener. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a boom in the prior art.

[0021] Figure 2 It is an enlarged view of part A.

[0022] Figure 3 It is an installation schematic diagram of the present invention and the connecting ear.

[0023] Figure 4 It is a front view of the fixing shaft in the present invention.

[0024] Figure 5 It is a side view of the fixing shaft in the present invention.

[0025] Figure 6 It is a side view of the first fixing member in the present invention.

[0026] Figure 7 It is a cross-sectional view of the second fixing member in the present invention.

[0027] Figure 8 It is a side view of the second fixing member in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0029] As Figures 1 to 8As shown in the figure, a fixing tooling applied to the boom of a crane is applied to the root of the crane boom, and includes a fixing shaft 3, a first fixing member 1, more than two second fixing members 2, and a fastener 4. The diameter of the fixing shaft 3 matches the aperture diameter of the mounting hole of the connecting ear 5 on the root of the boom (not marked in the figure). The length of the fixing shaft 3 is equal to or greater than the distance between two connecting ears 5 on the root of the boom, which can ensure that both ends of the fixing shaft 3 pass through two mounting holes and cross between the two connecting ears 5. A stepped portion 31 is formed by the middle part of the fixing shaft 3 being recessed inward along the radial direction. A chamfered portion 33 is formed between the stepped portion 31 and the outer side surface 32 of the fixing shaft. One end of the chamfered portion 33 is connected to the stepped portion 31, and an included angle a is formed between the chamfered portion 33 and the stepped portion 31. The angle range of the included angle a is set to 120° - 140°. In this embodiment, the included angle a is 135°. The other end of the chamfered portion 33 is connected to the outer side surface 32 of the fixing shaft 3. The distance between the connections of the chamfered portion 33 and the outer side surface 32 of the fixing shaft at both ends of the fixing shaft is equal to the length of the first fixing member 1. The first fixing member 1 is arranged between the connecting ears 5, and both ends of the first fixing member 1 abut against the inner sides of the connecting ears 5. The diameter of the inner side wall of the first fixing member 1 matches the maximum diameter of the outer side wall of the fixing shaft 3 (i.e., the diameter of the outer side surface 32 of the fixing shaft), so as to ensure that the first fixing member 1 is fittingly sleeved on the outer side surface 32 of the fixing shaft 3. Both ends of the first fixing member 1 extend outward along the radial direction to form first convex portions 11, and then the first convex portions 11 abut against the inner sides of the connecting ears 5. In this embodiment, the first fixing member 1 is a spacer sleeve with a hollow structure.

[0030] As Figure 3 shown, in this embodiment, the fastener 4 is a fastening bolt, which respectively passes through the second fixing member 2 from both ends of the fixing shaft 3 to fix the second fixing member 2 on the outer side of the connecting ear 5.

[0031] As Figure 3 、 4 and 7、 Figure 8 shown, the second fixing member 2 is provided with a through hole 21 matching the fastener 4. Both ends of the fixing shaft 3 are provided with counterbore holes 34 matching the fastener 4. Both ends of the second fixing member 2 extend outward perpendicular to the second fixing member 2 to form second convex portions 22. The second convex portions 22 and the second fixing member 2 form a groove 23. In the axial direction of the mounting hole, the fastener 4 passes through the through hole 21 to detachably fix the second fixing member 2 on the outer side of the connecting ear 5, so that the second fixing member 2 abuts against the outer side of the connecting ear 5 through the second convex portions 22. In this embodiment, the cross-sectional shape of the second fixing member 2 is U-shaped. After the second convex portions 22 abut against the outer side of the connecting ear 5, the fixing shaft 3 passing through the mounting hole can be accommodated in the U-shaped groove 23 to avoid contacting the second fixing member 2.

[0032] As Figure 3As shown, in this embodiment, the axes of the fixed shaft 3, the first fixing member 1, and the second fixing member 2 coincide with the axis of the mounting hole, which ensures that the fixed shaft 3, the first fixing member 1, and the second fixing member 2 interact with each other in the axial direction of the mounting hole, thereby limiting the connecting ear in the axial direction of the mounting hole and preventing the connecting ear 5 from deforming.

[0033] Working principle of the present utility model: Before the boom is transported, first place the first fixing member 1 between the connecting ears 5 and make the first fixing member 1 coaxial with the mounting holes on the connecting ears 5, so as to facilitate the two ends of the fixed shaft 3 to pass through the mounting holes and cross the connecting ears 5. In this way, the first fixing member 1 is sleeved on the fixed shaft 3. Then, the fastener 4 passes through the second fixing member 2 and is threadedly connected to the counterbore holes at both ends of the fixed shaft, thereby fixing the fixed shaft 3 on the connecting ear through the fastener 4. The second fixing member 2 restricts the movement of the fixed shaft 3 in the axial direction, thereby preventing the connecting ear from deforming. After the boom is transported to the destination, the first fixing member 1 and the second fixing member 2 are disassembled from the connecting ear, and then the subsequent installation of the boom is carried out, which facilitates the installation of the boom.

Claims

1. A fixing tooling applied to the crane boom, which is applied to the root of the crane boom, and is characterized in that: It includes a fixed shaft, a first fixing member, more than two second fixing members, and fasteners. The diameter of the fixed shaft matches the mounting hole of the connecting ear on the root of the boom. The first fixing member is arranged between the connecting ears and abuts against the inner side of the connecting ears. Both ends of the fixed shaft penetrate through the mounting hole, and the first fixing member is sleeved on the outer side of the fixed shaft. More than two second fixing members are fixed in the axial direction of the fixed shaft by fasteners, and both ends of the two second fixing members abut against the two outer side walls of the connecting ears.

2. The fixing tooling applied to the crane boom according to claim 1, characterized in that: The second fixing member is provided with through holes matching the fasteners, and both ends of the fixed shaft are provided with counterbore holes matching the fasteners. In the axial direction of the mounting hole, the fasteners pass through the through holes to detachably fix the second fixing members on the outer sides of the connecting ears.

3. The fixing tooling applied to a crane boom according to claim 1, characterized in that: The axes of the fixed shaft, the first fixing member, and the second fixing member all coincide with the axis of the mounting hole.

4. A fixing tooling applied to a crane boom according to claim 1, characterized in that: The first fixing member is a spacer sleeve with a hollow structure, and the diameter of the inner side wall of the first fixing member matches the maximum diameter of the outer side wall of the fixed shaft.

5. The fixing tooling applied to the crane boom according to claim 4, characterized in that: Both ends of the first fixing member extend outward along the radial direction to form first convex portions.

6. The fixed tooling applied to the crane boom according to claim 1, characterized in that: Both ends of the second fixing member extend outward perpendicular to the second fixing member to form second convex portions, and the second convex portions and the second fixing member form grooves.

7. The fixing tooling applied to a crane boom according to claim 6, characterized in that: The cross-sectional shape of the second fixing member is U-shaped.

8. The fixing tooling applied to a crane boom according to claim 1, characterized in that: The middle part of the fixed shaft is recessed inward along the radial direction to form a stepped portion, and a chamfered portion is formed between the stepped portion and the outer side surface of the fixed shaft.

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