Pulley fixing device of tower crane

Abstract

The utility model discloses a tower crane pulley fixing device in the technical field of tower cranes, which comprises a crane base, a crane main frame is assembled at the top end of the crane base, and a crane main arm is assembled on the side wall of the crane main frame; a sliding block is assembled on the crane main arm, and a pulley carrier plate is assembled at the bottom end of the sliding block; shaft seats a and shaft seats b are mounted on the opposite side walls of the two pulley carrying plates, the shaft seats a and the shaft seats b are oppositely arranged, pulley shafts are assembled between the shaft seats a and the shaft seats b on the left side and the right side, and fixed pulleys are assembled outside the pulley shafts; according to the pulley fixing device of the tower crane, the shaft seat a and the shaft seat b are arranged on the pulley carrying plate of the sliding block of the main arm of the crane, and the pulley shaft is connected with the shaft seats in a bolt connection mode, so that a traditional integrated structure is replaced, the pulley fixing device is convenient to disassemble and assemble, the pulley shaft is convenient to assemble or disassemble, the labor intensity of workers is low, and the working efficiency is high; and labor and time are saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tower crane technical field, concretely is a tower crane pulley fixing device. BACKGROUND

[0002] Tower crane originates in west Europe, and our country's tower crane industry started in the 1950s, from the technical development of tower crane, although new products emerge in an endless stream, new product has improved in production efficiency, easy operation, easy maintenance and reliable operation, but the technology of tower crane has no fundamental change, the research of tower crane is developing towards combination, so-called combination is to take tower body structure as core, according to structure and function characteristics, the tower body is decomposed into several parts, and according to serialization and generalization requirements, each part is divided into several modules again following the principle of module system, according to parameter requirements, appropriate module is selected to form tower crane with different technical performance characteristics, to meet the specific needs of construction, the implementation of combined tower crane helps to speed up the development progress of tower crane product, saves product development cost, and better serves customers, and the tower crane is divided into two categories of upper rotary tower crane and lower rotary tower crane, and the carrying capacity of the former is higher than that of the latter, and the tower crane that is seen in many construction sites is the upper rotary tower crane that is lifted up and connected high;

[0003] But the fixed shaft used in the fixed pulley fixing device of tower crane in the prior art adopts an integral structure, the fixed shaft with this structure will affect the normal use of the whole fixed shaft if one part thereof is seriously worn during use, leading to the whole fixed shaft having to be replaced, therefore, the prior art needs to be improved. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a tower crane pulley fixing device to solve the problem that the fixed shaft used in the fixed pulley fixing device of tower crane in the prior art adopts an integral structure, the fixed shaft with this structure will affect the normal use of the whole fixed shaft if one part thereof is seriously worn during use, leading to the whole fixed shaft having to be replaced.

[0005] To realize the above-mentioned purpose, the utility model provides the following technical scheme a tower crane pulley fixing device, including crane base, the top of crane base is equipped with crane main frame, the side wall of crane main frame is equipped with crane main arm;

[0006] The crane main arm is equipped with a sliding block, and the bottom end of the sliding block is equipped with a pulley carrier plate.

[0007] The opposite side walls of the two pulley carrier plates are respectively provided with shaft seats a and b, the shaft seats a and b are oppositely arranged, and pulley shafts are arranged between the shaft seats a and b on the left and right sides, and the outer parts of the pulley shafts are provided with fixed pulleys.

[0008] The outer walls of the shaft seats a and b are respectively provided with connecting plates, the side walls of the connecting plates are provided with screw holes, and the screw holes are respectively screwed with bolt bodies.

[0009] As a tower crane pulley fixing device of the utility model, the inner walls of the shaft seats a and b are uniformly and equidistantly provided with rotating cavities along the shafts, the rotating cavities are internally provided with rolling balls, and the rolling balls are arranged in close contact with the outer walls of the pulley shafts.

[0010] As a tower crane pulley fixing device of the utility model, the outer walls of the shaft seats a and b are provided with oil injection holes.

[0011] As a tower crane pulley fixing device of the utility model, the oil injection holes are provided with hole plugs.

[0012] As a tower crane pulley fixing device of the utility model, the bottom end of the bolt body is provided with a circular groove, the bottom end of the circular groove is provided with a bolt rod, and the bolt rod is externally screwed with a nut at the outer wall of the connecting plate.

[0013] As a tower crane pulley fixing device of the utility model, the outer part of the bolt rod is provided with a fixing ring at the upper end, the circumferential surface of the bolt rod is provided with an annular pressing piece, a spring and an annular rubber piece, and the upper end edge of the annular rubber piece is provided with a pressing block.

[0014] As a tower crane pulley fixing device of the utility model, the side wall of the crane main frame is provided with a control room, the other end of the crane main arm is provided with a counterweight arm, the bottom end of the counterweight arm is provided with a counterweight block, the outer part of the fixed pulley is provided with a hoisting steel rope, and the end of the hoisting steel rope is provided with a lifting hook.

[0015] Compared with the prior art, the tower crane pulley fixing device has the advantages that the structure design is reasonable,

[0016] The shaft seats a and b are arranged on the pulley carrier plate of the sliding block of the crane main arm, the pulley shafts are connected with the shaft seats through bolt connection, the traditional integrated structure is cancelled, the pulley shafts are convenient to disassemble and assemble, the labor intensity of workers is small, the working efficiency is high, and the workers are saved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model.

[0018] Figure 2 It is the fixed pulley schematic view of the utility model;

[0019] Figure 3 It is the axle seat a and axle seat b schematic view of the utility model;

[0020] Figure 4 It is the bolt main body schematic view of the utility model.

[0021] In the drawing: 1, crane base; 2, crane main frame; 3, control room; 4, counterweight; 5, counterweight arm; 6, crane main arm; 7, pulley carrier plate; 8, sliding block; 10, fixed pulley; 11, hoisting steel rope; 12, lifting hook; 13, axle seat a; 14, axle seat b; 15, pulley shaft; 16, oil injection hole; 17, bolt main body; 171, round groove; 172, annular rubber sheet; 173, bolt rod; 174, extrusion block; 175, annular pressing sheet; 176, fixing ring; 177, spring; 178, nut; 18, connecting plate; 19, screw hole; 20, hole plug; 21, rotating cavity; 22, ball. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] Please refer to Figures 1-4 The utility model provides a technical scheme:

[0024] In the technical scheme, a tower crane pulley fixing device includes a crane base 1, the top end of the crane base 1 is equipped with a crane main frame 2, the side wall of the crane main frame 2 is equipped with a crane main arm 6; the crane main arm 6 is equipped with a sliding block 8, the bottom end of the sliding block 8 is equipped with a pulley carrier plate 7; the opposite side walls of the two pulley carrier plates 7 are both installed with an axle seat a 13 and an axle seat b 14, the axle seat a 13 and the axle seat b 14 are oppositely arranged, the axle seat a 13 and the axle seat b 14 between the left and right sides are equipped with a pulley shaft 15, the outside of the pulley shaft 15 is equipped with a fixed pulley 10; the two side outer walls of the axle seat a 13 and the axle seat b 14 are both installed with a connecting plate 18, the side wall of the connecting plate 18 is provided with a screw hole 19, the screw hole 19 is screwed with a bolt main body 17.

[0025] In the technical scheme, the crane base 1, the crane main frame, the crane main arm 6, the control room 3, the counterweight arm and the counterweight block 4 are main components of the tower crane in the prior art, the bottom end of the sliding block 8 is provided with the pulley carrier plate 7 on both sides, the side wall of each pulley carrier plate 7 is provided with the opposite shaft seat a 13 and the shaft seat b 14, the fixed pulley 10 is arranged outside the pulley shaft 15, the pulley shaft 15 is arranged in the combined shaft seat a 13 and the shaft seat b 14, the pulley shaft 15 is maintained through the detachable structure, and the shaft seat a 13 and the shaft seat b 14 are connected through the threaded connection.

[0026] In the technical scheme, the inner wall of the shaft seat a 13 and the shaft seat b 14 is uniformly and equidistantly provided with the rotating cavity 21 along the axis, and the rotating cavity 21 is internally provided with the ball 22.

[0027] In the technical scheme, the ball 22 can roll in the rotating cavity 21, the outer wall of the pulley shaft 15 is arranged in close contact with the ball 22, and when the pulley shaft 15 rotates, the ball 22 can roll in the rotating cavity 21, impurities entering the shaft seat a 13 and the shaft seat b 14 are stirred, accumulation is prevented, and the rotation of the pulley shaft 15 is affected.

[0028] In the technical scheme, the outer wall of the shaft seat a 13 and the shaft seat b 14 is provided with the oil injection hole 16; the oil injection hole 16 is provided with the plug 20.

[0029] In the technical scheme, the oil injection hole 16 is in communication with the rotating cavity 21, lubricating oil can be added to the inside of the rotating cavity 21, and the oil injection hole 16 can be closed through the plug 20.

[0030] In the technical scheme, the bottom end of the bolt body 17 is provided with the circular groove 171, the bottom end of the circular groove 171 is provided with the bolt rod 173, and the outer wall of the bolt rod 173 is screwed with the nut 178 of the connecting plate 18.

[0031] In the technical scheme, after the shaft seat a 13 and the shaft seat b 14 are combined, the two connecting plates 18 are connected, the screw hole 19 is corresponded, the bolt rod 173 of the bolt body 17 is screwed into the screw hole 19, the nut 178 is screwed on the outside of the bolt rod 173, and the two connecting plates 18 are fastened.

[0032] In the technical scheme, the outer upper end of the bolt rod 173 is provided with the fixing ring 176, and the circumferential surface of the bolt rod 173 is provided with the annular pressing piece 175, the spring 177 and the annular rubber sheet 172.

[0033] In the technical scheme, the annular pressing piece 175 is located on the upper side of the fixing ring 176, the spring 177 is located on the upper side of the annular pressing piece 175, and the annular rubber sheet 172 is located on the lower side of the fixing ring 176. In the technical scheme, the annular pressing piece 175 is located on the upper side of the fixing ring 176, the spring 177 is located on the upper side of the annular pressing piece 175, and the annular rubber sheet 172 is located on the lower side of the fixing ring 176.

[0034] In some technical solutions, the extrusion block 174 is installed at the upper end edge of the annular rubber sheet 172.

[0035] In this technical solution, the annular pressing sheet 175 is pressed downward by the spring 177, the extrusion block 174 is pressed downward by the annular pressing sheet 175, the extrusion block 174 further presses the edge of the annular rubber sheet 172, and the sealing effect is improved.

[0036] In some technical solutions, the side wall of the main frame 2 is equipped with a control room 3, the other end of the main arm 6 is equipped with a counterweight arm 5, the bottom end of the counterweight arm 5 is equipped with a counterweight block 4, the outside of the fixed pulley 10 is equipped with a hoisting steel rope 11, and the end of the hoisting steel rope 11 is installed with a lifting hook 12.

[0037] Working principle: in use, first, the shaft seat a 13 and the shaft seat b 14 are combined and fixed through the bolt main body 17, then the combined shaft seat a 13 and the shaft seat b 14 are fixed on the side wall of the pulley load plate 7, and then the fixed pulley 10 and the pulley shaft 15 are installed in the shaft seat a 13 and the shaft seat b 14.

[0038] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or apparatus.

[0039] Although the utility model has been described above with reference to the embodiments, various improvements can be made and equivalent parts can be replaced without departing from the scope of the utility model. In particular, as long as there is no structural conflict, each feature in the embodiments disclosed by the utility model can be combined with each other in any way, and the combinations are not exhaustively described in the specification only for the purpose of omitting the length and saving resources. Therefore, the utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tower crane sheave fixing arrangement comprising a crane base (1), characterised in that: The top end of the crane base (1) is equipped with a crane main frame (2), and the side wall of the crane main frame (2) is equipped with a crane main arm (6); The crane main arm (6) is equipped with a sliding block (8), and the bottom end of the sliding block (8) is equipped with a pulley carrier plate (7); The opposite side walls of the two pulley carrier plates (7) are each provided with an axle seat a (13) and an axle seat b (14), the axle seat a (13) and the axle seat b (14) are oppositely arranged, and the axle seat a (13) and the axle seat b (14) on the left and right sides are equipped with a pulley shaft (15), and the outside of the pulley shaft (15) is equipped with a fixed pulley (10); The two side walls of the axle seat a (13) and the axle seat b (14) are each provided with a connecting plate (18), and the side wall of the connecting plate (18) is provided with a threaded hole (19), and the threaded hole (19) is screwed with a bolt body (17).

2. A tower crane sheave fixing device according to claim 1, characterised in that, The inner wall of the axle seat a (13) and the axle seat b (14) is uniformly and equidistantly provided with a rotating cavity (21) along the axis, and the rotating cavity (21) is internally provided with a ball (22), and the ball (22) is arranged in close contact with the outer wall of the pulley shaft (15).

3. A tower crane sheave fixing device according to claim 2, characterised in that, The outer wall of the axle seat a (13) and the axle seat b (14) is provided with an oil injection hole (16).

4. A tower crane sheave fixing device according to claim 3, characterised in that, The oil injection hole (16) is provided with a plug (20).

5. A tower crane sheave securing device according to claim 1, wherein, The bottom end of the bolt body (17) is provided with a circular groove (171), the bottom end of the circular groove (171) is provided with a bolt rod (173), and the bolt rod (173) extends to the outer wall of the connecting plate (18) and is screwed with a nut (178).

6. A tower crane sheave fixing device according to claim 5, characterised in that, The outer portion of the bolt rod (173) is provided with a fixing ring (176), and the circumferential surface of the bolt rod (173) is provided with an annular pressing piece (175), a spring (177) and an annular rubber sheet (172), and the upper end edge of the annular rubber sheet (172) is provided with a pressing block (174).

7. A tower crane sheave securing device according to claim 1, wherein, The side wall of the crane main frame (2) is equipped with a control room (3), the other end of the crane main arm (6) is equipped with a counterweight arm (5), the bottom end of the counterweight arm (5) is equipped with a counterweight block (4), the outside of the fixed pulley (10) is provided with a lifting steel rope (11), and the end of the lifting steel rope (11) is provided with a lifting hook (12).

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