Pin shaft assembly type clamp for tower crane attachment frame

Abstract

The utility model discloses a pin shaft assembly type hoop for an attachment frame of a tower crane in the technical field of tower crane components, which comprises a top block component, a left connecting frame, a middle connecting frame, a right connecting frame and a pin shaft, at least two first mounting holes are formed in one end of the left connecting frame, and a first end hole is formed in the other end of the left connecting frame; at least two first mounting holes are formed in one end of the left connecting frame, at least two second mounting holes are formed in one end of the right connecting frame, a second end hole is formed in the other end of the right connecting frame, third mounting holes are formed in the middle connecting frame and correspond to the first mounting holes and the second mounting holes respectively, and the left connecting frame, the middle connecting frame and the right connecting frame are connected in a surrounding mode through pin shafts to form a semi-surrounding structure. The semi-surrounding structure is provided with a concave side and a convex side, and the ejector block component is fixed to the concave side of the semi-surrounding structure. According to the hoop, the technical problems that an existing hoop is difficult to install and low in structural strength are solved, welding structures are reduced, the hoop is divided into a plurality of light components, workers can work aloft conveniently, and the installation difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of tower crane components, and in particular to a pin-mounted clamp for the attachment frame of a tower crane. Background Technology

[0002] Currently, the clamps used in tower cranes are used to secure the attachment frame to the standard sections of the tower body.

[0003] Chinese utility model patent CN205662258U discloses an attachment frame device for tower cranes, consisting of a beam frame, four clamps, four top blocks, and eight support components. The clamps are small rectangular structures lacking one side, directly welded from straight square plates. This structure is bulky and has low structural strength, especially at the welded joints between the horizontal and vertical plates. Since tower cranes are typically used outdoors, the clamps are susceptible to rain corrosion, which weakens the weld joint and causes cracks, creating safety hazards. The clamps, welded from straight square plates, generally weigh over 90 kg. During installation, they must be manually moved from outside the standard tower section to inside, assembled and fixed to the attachment frame, and then secured to the standard tower section. This requires mechanical handling such as hoists, is time-consuming, and difficult to install. Utility Model Content

[0004] To address the technical problems of difficult installation and low structural strength of existing clamps, this utility model provides a pin-assembled clamp for the attachment frame of tower cranes that is easy to install and has high strength.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A pin-mounted clamp for a tower crane attachment frame includes a top block component, a left connecting frame, a middle connecting frame, a right connecting frame, and pins. The left connecting frame has at least two first mounting holes at one end and a first end hole at the other end. The right connecting frame has at least two second mounting holes at one end and a second end hole at the other end. The middle connecting frame has a third mounting hole, which corresponds to the first and second mounting holes respectively. The left and middle connecting frames are connected by pins passing through the first and third mounting holes. The right and middle connecting frames are connected by pins passing through the second and third mounting holes. The left, middle, and right connecting frames together form a semi-enclosed structure with a concave side and a convex side. The top block component is fixed to the concave side of the semi-enclosed structure.

[0007] Furthermore, the left connecting frame includes a first connecting column and two left connecting plates, the left connecting plates being "L"-shaped, the two left connecting plates being mirror-distributed at both ends of the first connecting column, and both left connecting plates being fixedly connected to the first connecting column. The middle connecting frame includes a second connecting column and two middle connecting plates, the two middle connecting plates being mirror-distributed at both ends of the second connecting column, and both middle connecting plates being fixedly connected to the second connecting column. The right connecting frame includes a third connecting column and two right connecting plates, the right connecting plates being "L"-shaped, the two right connecting plates being mirror-distributed at both ends of the third connecting column, and both right connecting plates being fixedly connected to the third connecting column.

[0008] Furthermore, the top block component has a protrusion with bolt holes, the protrusion extends between the two middle connecting plates, and a part of the top block component abuts against the concave side of the semi-enclosed structure. The two middle connecting plates have assembly holes, which are coaxially arranged, and bolts pass through the assembly holes of the middle connecting plates and the bolt holes of the protrusion.

[0009] Furthermore, it also includes a gasket, which is fitted onto the bolt, and the outer diameter of the gasket is larger than the diameter of the mounting hole.

[0010] Furthermore, a central hole is provided on the main body between the concave and convex sides of the semi-enclosed structure.

[0011] Furthermore, the semi-enclosed structure formed by the left connecting frame, the middle connecting frame, and the right connecting frame is a symmetrical structure.

[0012] The beneficial effects of this utility model are:

[0013] The clamp is disassembled into a left connecting frame, a middle connecting frame, and a right connecting frame. The left and middle connecting frames are connected by pins, and the right and middle connecting frames are connected by pins. The left, middle, and right connecting frames are connected to form a semi-enclosed structure. This assembled clamp reduces the welding structure in the clamp and replaces the traditional clamp made by directly welding horizontal and vertical plates. It avoids the easy damage at the welded joints between horizontal and vertical plates and improves the structural strength. In addition, the clamp, which weighs more than 90 kg, is disassembled into multiple lighter parts, which makes it easier for workers to operate at heights and reduces the difficulty of installation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the pin-shaft assembly clamp for the attachment frame of a tower crane according to this utility model;

[0015] Figure 2 yes Figure 1 An explosion diagram;

[0016] Figure 3 This is a schematic diagram of a clamp without a central hole.

[0017] Figure 4 This is a structural schematic diagram of the top block component;

[0018] Figure 5 This is a schematic diagram of the structure of the clamp installed on the attachment frame of the tower crane;

[0019] Figure 6 This is a schematic diagram of the structure of a tower crane's attachment frame installed on a standard section of the tower body using clamps;

[0020] The markings in the diagram are as follows: 1-Top block component, 2-Left connecting frame, 201-First end hole, 202-First mounting hole, 3-Middle connecting frame, 31-Third mounting hole, 4-Right connecting frame, 41-Second end hole, 42-Second mounting hole, 5-Pin, 6-Left connecting plate, 7-First connecting column, 8-Middle connecting plate, 9-Second connecting column, 10-Right connecting plate, 11-Third connecting column, 12-Protrusion, 13-Bolt hole, 14-Assembly hole, 15-Bolt, 16-Washer, 17-Intermediate hole, 18-Front beam, 19-Rear beam, 20-Side beam, 21-Standard section of tower body, 22-Wedge block, 23-Telescopic rod. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the present invention will be further described below with reference to the accompanying drawings.

[0022] First, it should be stated that the technical solutions of the embodiments of this application are clearly and completely described. The described embodiments are only some of the embodiments of this application, and not a limitation of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] In the description of this utility model, it should be understood that the terms "first", "second", "upper", "lower", "left", "right", "inner", "outer", "axial" or "radial" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and are not intended to indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0024] It should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixation," etc., should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Reference Figures 1 to 6 This utility model provides a pin-mounted clamp for the attachment frame of a tower crane.

[0026] like Figures 1 to 3 As shown in the embodiment of this solution, the pin-assembled clamp for the attachment frame of the tower crane includes a top block component 1, a left connecting frame 2, a middle connecting frame 3, a right connecting frame 4, and a pin 5. One end of the left connecting frame 2 is provided with at least two first mounting holes 202, and the other end is provided with a first end hole 201. One end of the right connecting frame 4 is provided with at least two second mounting holes 42, and the other end is provided with a second end hole 41. The middle connecting frame 3 is provided with a third mounting hole 31, which corresponds to the first mounting hole 202 and the second mounting hole 42 respectively. The left connecting frame 2 and the middle connecting frame 3 are connected by the pin 5 passing through the first mounting hole 202 and the third mounting hole 31. The right connecting frame 4 and the middle connecting frame 3 are connected by the pin 5 passing through the second mounting hole 42 and the third mounting hole 31. The left connecting frame 2, the middle connecting frame 3, and the right connecting frame 4 together form a semi-enclosed structure. The semi-enclosed structure has a concave side and a convex side. The top block component 1 is fixed on the concave side of the semi-enclosed structure.

[0027] The semi-enclosed structure formed here can be an arc structure or composed of multiple segments. Not every segment needs to be arc-shaped; it can be a combination of straight lines and arcs, creating a roughly curved structure. This results in the two ends of the semi-enclosed structure protruding and the middle recessed, facilitating the placement of the top block component 1 at the recessed location. For example... Figure 1 As shown, the clamp is made into a shape similar to a "bow".

[0028] Regarding how to use the pin 5 for connection, the pin 5 passes through the first mounting hole 202 and the third mounting hole 31; the pin 5 passes through the second mounting hole 42 and the third mounting hole 31, with clearance fit, and a cotter pin is inserted into the lower end of the pin 5 to prevent the pin 5 from falling off.

[0029] like Figure 1 and Figure 2As shown, in this embodiment of the solution, the left connecting frame 2 includes a first connecting column 7 and two left connecting plates 6. The left connecting plates 6 are "L" shaped and are mirror-distributed at both ends of the first connecting column 7. Both left connecting plates 6 are fixedly connected to the first connecting column 7. The middle connecting frame 3 includes a second connecting column 9 and two middle connecting plates 8. The two middle connecting plates 8 are mirror-distributed at both ends of the second connecting column 9. Both middle connecting plates 8 are fixedly connected to the second connecting column 9. The right connecting frame 4 includes a third connecting column 11 and two right connecting plates 10. The right connecting plates 10 are "L" shaped and are mirror-distributed at both ends of the third connecting column 11. Both right connecting plates 10 are fixedly connected to the third connecting column 11.

[0030] In addition to setting the left connecting frame 2, the middle connecting frame 3, and the right connecting frame 4 to the shape described in the above embodiment, they can also be set to other shapes. Taking the left connecting frame 2 as an example, in addition to setting the left connecting plate 6 to be "L" shaped, the two left connecting plates 6 are mirror-distributed at both ends of the first connecting column 7. Both left connecting plates 6 are fixedly connected to the first connecting column 7. The left connecting frame 2 can be directly set to an "L" shaped workpiece, and is not limited to being made of two plates. It can also be directly cast into an "L" shaped workpiece. The left connecting frame 2 is not limited to being "L" shaped. As long as the left connecting frame 2, the middle connecting frame 3, and the right connecting frame 4 form a semi-enclosed structure, for example, the left connecting frame 2 and the right connecting frame 4 are long strips, and the middle connecting frame 3 is an arc-shaped structure. In this way, a semi-enclosed structure can also be formed.

[0031] There are two left connecting plates 6. The two left connecting plates 6 are usually identical in structure, so that the corresponding first end holes 201 and first mounting holes 202 on the two left connecting plates 6 correspond to each other, so as to facilitate the assembly of the two left connecting plates 6 into a left connecting frame 2. That is, the central axes of the first end holes 201 of the two left connecting plates 6 are coaxial, and the central axes of the first mounting holes 202 of the two left connecting plates 6 are coaxial. Similarly, there are two right connecting plates 10. The two right connecting plates 10 are usually identical in structure, so that the corresponding second end holes 41 and second mounting holes 42 on the two right connecting plates 10 correspond to each other, so as to facilitate the assembly of the two right connecting plates 10 into a right connecting frame 4. That is, the central axes of the second end holes 41 of the two right connecting plates 10 are coaxial, and the central axes of the second mounting holes 42 of the two right connecting plates 10 are coaxial. Similarly, the two middle connecting plates 8 are also set in the above manner.

[0032] Both left connecting plates 6 are fixedly connected to the first connecting post 7, both middle connecting plates 8 are fixedly connected to the second connecting post 9, and both right connecting plates 10 are fixedly connected to the third connecting post 11. Preferably, they are fixed by welding, but they can also be integrally formed or other existing fixing methods.

[0033] The left connecting plate 6 is "L" shaped and the right connecting plate 10 is "L" shaped. It is not required that they be completely "L" shaped. Instead, they should have a bend with a rounded transition to make them approximately "L" shaped.

[0034] like Figure 4 As shown, in this embodiment of the solution, the top block component 1 has a protrusion 12, and a bolt hole 13 is provided on the protrusion 12. The protrusion extends between the two middle connecting plates 8. A part of the top block component 1 abuts against the concave side of the semi-enclosed structure. The two middle connecting plates 8 are provided with assembly holes 14. The assembly holes 14 of the two middle connecting plates 8 are arranged coaxially. Bolts are passed through the assembly holes 14 of the middle connecting plates 8 and the bolt holes 13 of the protrusion 12.

[0035] The top block component 1 can be directly welded to the concave side of the semi-enclosed structure, or it can be fixed in the manner described in the above embodiment. The top block component 1 is set on the concave side of the semi-enclosed structure, with the protrusion 12 of the top block component 1 located between the two middle connecting plates 8. The bolts pass through the bolt holes 13 at the protrusion 12 and the assembly holes 14 of the middle connecting plates 8. In addition, the top block component 1 has a part that abuts against the concave side of the semi-enclosed structure, thereby fixing the top block component 1 relative to the semi-enclosed structure. This part can be the outer surface of the top block component 1 or an external component.

[0036] The specific structure of the top block component 1 has no substantial impact on this utility model, and the structure used in the prior art can be referenced, so it will not be described in detail here.

[0037] like Figure 1 and Figure 2 As shown, in this embodiment of the solution, a washer 16 is also included. The washer 16 is sleeved on the bolt. The outer diameter of the washer 16 is larger than the diameter of the assembly hole 14. The washer 16 is sleeved on both ends of the bolt. The washer 16 is located between the bolt head of the bolt and the middle connecting plate 8. The washer 16 is located between the nut of the bolt and the middle connecting plate 8.

[0038] like Figure 1 As shown in the embodiment of this solution, a central hole 17 is provided on the main body between the concave and convex sides of the semi-enclosed structure. Alternatively, a protruding structure can be provided on the convex side of the semi-enclosed structure, and the central hole 17 can be provided on the protruding structure.

[0039] like Figure 1 As shown, in this embodiment of the solution, the semi-enclosed structure formed by the left connecting frame 2, the middle connecting frame 3, and the right connecting frame 4 is a symmetrical structure. In order to optimize the stress of the clamp, the semi-enclosed structure is set as a symmetrical structure, the middle hole 17 is set on the axis of symmetry, and the first end hole 201 and the second end hole 41 are symmetrically distributed on both sides of the axis of symmetry. Preferably, the top block component 1 is also located on the axis of symmetry.

[0040] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the pin-shaft assembly clamp is used in the tower crane attachment frame. The operation process is as follows: to install the tower crane attachment frame, first lift the front beam 18, rear beam 19 and two side beams 20 to a suitable position on the standard section 21 of the tower body, and then assemble them into the tower crane attachment frame using eight pins 5. Move the left connecting frame 2 to the right-angled side of the first corner of the four corners of the tower crane attachment frame, and install it on the tower crane attachment frame through the pin 5. Move the right connecting frame 4 to the other right-angled side of the first corner of the four corners of the tower crane attachment frame, and install it on the tower crane attachment frame through the pin 5. Move the middle connecting frame 3 to the first corner of the four corners of the tower crane attachment frame. Rotate the left connecting frame 2 and the right connecting frame 4, and install the middle connecting frame 3 onto the left connecting frame 2 and the right connecting frame 4 through the four pins 5, thereby forming a clamp with a semi-enclosed structure. Then install the top block component 1, and install the top block component 1 on the clamp through the bolt 15. Insert the wedge 22 into the top block component 1. The wedge 22 is installed in the gap between the tower body standard section 21 and the top block component 1, and is used to clamp the tower body standard section 21. Following the above method, clamps are also installed diagonally opposite the first corner of the standard tower section 21. Both clamps at these two corners have a central hole 17. For the clamps at the other two corners, the central hole 17 is not required; they are installed using the same method. Finally, the telescopic rod 23 is adjusted to a suitable length. Both ends of the telescopic rod 23 are connected to the central hole 17 of the clamp via pins 5. The wedges 22 are then tightened to complete the installation of the tower crane's attachment frame.

Claims

1. A pin bolted assembly type clamp for a tower crane attachment frame, comprising a top block part (1), characterized in that: The left connecting frame (2), the middle connecting frame (3), the right connecting frame (4) and the pin shaft (5) are further included, one end of the left connecting frame (2) is provided with at least two first mounting holes (202), the other end is provided with a first end hole (201), one end of the right connecting frame (4) is provided with at least two second mounting holes (42), the other end is provided with a second end hole (41), the middle connecting frame (3) is provided with a third mounting hole (31), the third mounting hole (31) corresponds to the first mounting hole (202) and the second mounting hole (42) respectively, the left connecting frame (2) and the middle connecting frame (3) are connected through the pin shaft (5) arranged in the first mounting hole (202) and the third mounting hole (31), the right connecting frame (4) and the middle connecting frame (3) are connected through the pin shaft (5) arranged in the second mounting hole (42) and the third mounting hole (31), the left connecting frame (2), the middle connecting frame (3) and the right connecting frame (4) form a half-enclosed structure, the half-enclosed structure has a concave side and a convex side, and the top block component (1) is fixed on the concave side of the half-enclosed structure.

2. A pin bolted assembly collar for a tower crane attachment frame as defined in claim 1, characterized in that: The left connecting frame (2) includes a first connecting column (7) and two left connecting plates (6), the left connecting plate (6) is in the shape of "L", the two left connecting plates (6) are mirror image distributed at two ends of the first connecting column (7), and the two left connecting plates (6) are fixedly connected with the first connecting column (7), the middle connecting frame (3) includes a second connecting column (9) and two middle connecting plates (8), the two middle connecting plates (8) are mirror image distributed at two ends of the second connecting column (9), and the two middle connecting plates (8) are fixedly connected with the second connecting column (9), the right connecting frame (4) includes a third connecting column (11) and two right connecting plates (10), the right connecting plate (10) is in the shape of "L", the two right connecting plates (10) are mirror image distributed at two ends of the third connecting column (11), and the two right connecting plates (10) are fixedly connected with the third connecting column (11).

3. A pin bolted assembly collar for a tower crane attachment frame as defined in claim 2, characterized in that: The top block component (1) has a protruding part (12), a bolt hole (13) is formed in the protruding part (12), the protruding part extends into the two middle connecting plates (8), the top block component (1) has a part abutting against the concave side of the half-enclosed structure, the two middle connecting plates (8) are provided with assembly holes (14), the assembly holes (14) of the two middle connecting plates (8) are coaxially arranged, and a bolt (15) is arranged in the assembly hole (14) of the middle connecting plate (8) and the bolt hole (13) of the protruding part (12).

4. A pin bolted assembly collar for a tower crane attachment frame as defined in claim 3, characterized in that: The gasket (16) is sleeved on the bolt, and the outer diameter of the gasket (16) is greater than the diameter of the assembly hole (14).

5. The pin bolted assembly collar for a tower crane attachment frame of claim 1 characterized by: An intermediate hole (17) is arranged on the main body between the concave side and the convex side of the half-enclosed structure.

6. A pin bolted assembly collar for a tower crane attachment frame according to any one of claims 1-5, characterized in that: The half-enclosed structure formed by the left connecting frame (2), the middle connecting frame (3) and the right connecting frame (4) is a symmetrical structure.

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