CN103420286B - Downswing Slewing Mechanism of Tower Crane - Google Patents

Abstract

The present invention provides a downward rotating slewing mechanism of a tower crane, which mainly comprises a tower body, a slewing mechanism arranged at the bottom of the tower body, a frame cage sleeved on the outside of the tower body, and a movable arm horizontally arranged on one side of the frame cage; the slewing mechanism comprises a base, a supporting seat arranged on the top of the base, and a basic segment frame, and the slewing machine is arranged at the bottom of the tower body to reduce the weight on the tower body and make the center of gravity more stable, and the assembly end faces of the basic segment frame and the standard segment frames constituting the tower body are formed into a rectangle with a long and short side length ratio of 1.3 to 9, so that the movable arm is kept extending along the two long sides of the rectangle, thereby increasing the supporting strength and stability of the lifting operation, and achieving the purpose of increasing the load-bearing capacity of the tower crane.

Description

Downswing Slewing Mechanism of Tower Crane

technical field

The invention relates to a tower crane, in particular to a tower crane in which the slewing mechanism is arranged below the tower body and the moving arm is arranged horizontally on the tower body.

Background technique

In the tower crane 10 shown in Figure 1, a slewing mechanism 13 is located on the upper part of the tower body 11, and the bottom and top of the slewing mechanism 13 are respectively assembled with the sleeve cage 12 and the moving arm 14. Crane; it is worth noting that its operating feature is that the tower body 11 does not rotate, and the swing arm 14 is rotated around the tower body 11 by means of the slewing mechanism 13, and the tower body 11 is assembled and the object is lifted horizontally and vertically. Therefore, the boom 14 of the tower crane 10 and the turning mechanism 13 that drives the boom 14 to rotate must be located at the top of the tower body 11 .

However, when the existing tower crane 10 is actually operated, the following problems will occur because its slewing mechanism 13 is arranged on the top of the tower body 11:

1. As shown in Figure 1, when the slewing mechanism 13 is assembling the tower body 11, it must prop up the upper structure such as the boom 14 and the balance arm 15 to form a space for inserting the joint frame, and when lifting the object, it must The upper structure must be driven to rotate horizontally, so that the slewing mechanism 13 has the characteristics of complex structure, bulky size, and heavy weight. When operating on the upper part of the tower body 11, it not only moves the center of gravity of the tower crane 10 upwards, but also reduces the stability of the overall structure. , It is also not conducive to the maintenance of the staff;

2. As shown in FIG. 2A, the horizontal section of the joint frame 110 of the existing tower crane 10 tower 11 is square, and as shown in FIG. For the load-bearing area of the boom 14, and with the rotation of the boom 14, four intersections P1 on two opposite sides of the horizontal section of the joint frame 110 or four intersections P2 on four sides are formed. It is worth noting that the The load-bearing area of the four intersections P on the four sides is smaller than that on the two opposite sides, so that the swing arm 14 cannot obtain stable support strength when it rotates, especially the slewing mechanism 13 is bearing the swing arm 14 and the balance arm 15. , driver's cab 16 and other mechanisms under the weight of the situation, so that a consistent force F will be formed during the rotation, causing the structure of the tower body 11 to twist, which not only affects the lifting capacity of the existing tower crane 10, but also in the operation process. Directly weaken the strength of the supporting structure of the tower body 11;

3. As shown in Figure 1, in order to enable the staff to operate the boom 14 clearly and accurately, the driver's cab 16 is usually located on the side of the slewing mechanism 13 under the boom 14, so that it cannot be raised and lowered along the tower body 11, making the work Personnel must use the climbing equipment 111 inside the tower body 11 to enter the driver's cab 16 for operation from the ground, which not only affects the efficiency of personnel operation, but also the working environment is not conducive to the safety of the staff;

To sum up, the existing upper rotating tower crane 10 does have room for further improvement during actual operation.

Contents of the invention

The technical problem to be solved by the present invention is to provide a down-rotating slewing mechanism of the tower crane, which mainly installs the slewing mechanism of the tower crane at the bottom of the tower body to greatly reduce the weight of the upper part of the tower body, so that the tower crane The center of gravity of the tower body of the crane is more stable, achieving the purpose of increasing the overall structural strength of the tower crane.

Another technical problem to be solved by the present invention is to provide a down-rotating slewing mechanism of a tower crane, which is mainly formed by forming the foundation joint frame at the top of the slewing mechanism and the standard joint frame forming the tower body. It is a rectangle whose length of the long side is 1.3 to 9 times of the length of the short side, and the boom is kept extending along the two long sides of the rectangle, so that the boom has a stable support strength during the lifting operation, so as to increase the strength of the tower crane. purpose of load-bearing capacity.

Another technical problem to be solved by the present invention is to provide a downswing slewing mechanism of a tower crane, which is mainly achieved by installing the slewing mechanism at the bottom of the tower body and connecting the boom horizontally to one side of the sleeve cage. And a driver's cab is arranged on the lower side of the boom, so that the sleeve cage can be displaced up and down along the tower body, and the driver's cab can be displaced with the sleeve cage and lowered to the ground, so as to facilitate the operation of personnel entering and leaving the driver's cab. Greatly improve the operational safety of staff.

In order to solve the problems of the prior art, the swing arm and the tower body of the tower crane move in tandem, and the technical solution adopted by the present invention is to provide a down-rotating slewing mechanism of the tower crane. The crane mainly has a tower body. The tower body is composed of a plurality of standard joint frames, a frame cage is set outside the tower body, and a horizontally extending boom is provided on one side of the bottom of the frame cage; wherein, a rotating arm is provided at the bottom of the tower body mechanism, the rotary mechanism includes: a base, the bottom of which is fixed on a foundation, and two opposite mounting seats are arranged on the top of the base; a supporting seat, the bottom of which is fixed to the top of the base, and the support A transmission part is formed on the outside of the periphery of the bottom of the seat; a basic joint frame is fixed on the top of the support seat, and the top of the basic joint frame is formed with a rectangular assembly end face assembled with the two rectangular assembly end faces of the standard joint frame , the assembly end faces of the standard joint frame and the basic joint frame each have two relatively long sides and two relatively short sides, and the length of the long side is 1.3 to 9 times the length of the short side; a power unit, comprising Two power sources are fixed with the two mounting seats of the base, and a transmission belt is wound around the top of the base and fixed with the transmission part of the support seat, and the power source drives the transmission belt to drive the The supporting seat, the foundation joint frame and the tower body rotate, so that the moving arm moves with the tower body as the axis.

Wherein, the bottom of the base is formed with a group of setting parts, and a fixed plate is fixed between the setting part and the foundation. The fixed plate is formed with a connecting part and a fixing part. The base set The setting part is fixed on the connection part of the fixed disk part, and a plurality of positioning bolts penetrate the base assembly part and lock the connection part of the fixed disk part, and the fixing part of the fixed disk part is a plurality of The anchor bolts are inserted and locked with the foundation.

Wherein, the transmission belt of the power unit is formed with a tooth surface, and each of the two power sources is provided with a driving gear, and the driving gear meshes with the transmission belt tooth surface to drive the support seat to rotate.

Wherein, between the transmission belt of the power unit and the transmission part of the supporting seat, there are a plurality of bolts passing through the transmission part and locked with the transmission belt.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

Fig. 1 is a schematic diagram of the overall appearance of the existing tower crane.

Fig. 2A is a three-dimensional schematic diagram of the slewing structure of the existing tower crane.

FIG. 2B is a schematic diagram of the rotation of the boom driven by the slewing structure of the existing tower crane.

Fig. 3A is a schematic perspective view of the tower crane of the present invention.

FIG. 3B is a partially enlarged schematic diagram of FIG. 3A in the present invention.

Fig. 4 is a schematic perspective view of the synchronous rotary mechanism of the present invention.

Fig. 5 is a three-dimensional structural schematic diagram of Fig. 4 after rotation in the present invention.

Fig. 6 is a schematic front view of Fig. 5 of the present invention.

Fig. 7 is a schematic diagram of the rotation of the boom driven by the slewing structure of the tower crane according to the present invention.

Explanation of reference signs

10 is the tower crane A is the tower body

110 is the joint frame 111 is the climbing equipment

B is the sleeve cage C is the slewing mechanism

D is the boom E is the balance arm

D1 is the cab 17 is the luffing mechanism

P1, P2 are intersection points

F is the force of consistency

A1 is the standard frame

A11 is the assembly end face

G is the foundation

20 is the base 21 is the assembly department

211 is a positioning bolt 22 is a fixed plate

221 is the connection part 222 is the fixed part

223 is the anchor bolt 23 is the mounting seat

30 is the support seat 31 is the transmission part

40 is the basic section frame 41 is the assembly end face

50 is the power unit 51 is the power source

511 is the driving gear 52 is the transmission belt

521 is the tooth surface 522 is the bolt

a is the long side b is the short side

Detailed ways

First, as shown in Figure 3A, it shows a schematic view of the structural appearance of the down-rotating slewing mechanism of a tower crane provided by the present invention, the crane mainly has a tower body A, and the tower body A is composed of a plurality of standard joint frames A1 , each of the standard joint frames A1 has the two opposite and rectangular assembly end faces A11, the tower body A is sheathed with a frame cage B that can move up and down along it, and a slewing mechanism C is arranged at the bottom of the tower body A And it is assembled with the bottom assembly end surface A11 of the standard joint frame A1 with the lowest height position, wherein a horizontally extending boom D is provided on the bottom side of the sleeve cage B, and the boom D is adjacent to one end of the sleeve cage B A driver's cab D1 is arranged on the lower side, and a balance arm E is arranged on the side opposite to the boom D on the top of the sleeve cage B to balance the weight of the boom D side.

As for the preferred embodiment of the slewing mechanism C of the present invention, as shown in FIGS. 3A and 3B in conjunction with FIGS. 4 to 6, the slewing mechanism C mainly includes a base 20 set on a foundation G, and a The support base 30, a base frame 40 and a power unit 50, wherein:

The base 20, as shown in FIG. 6 , has a set part 21 formed at the bottom, and a fixed disk part 22 is fixed between the set part 21 and the foundation G. The fixed disk part 22 is formed with a connecting part 221 and a The fixing part 222, the assembly part 21 of the base 20 is fixed on the connection part 221 of the fixed disk part 22, so that a plurality of positioning pins 211 pass through the connection part between the assembly part 21 of the base 20 and the fixed disk part 22 221 is locked, and the fixed portion 222 of the fixed plate 22 is penetrated by a plurality of anchor bolts 223 and locked with the foundation G; in addition, two opposite mounting seats 23 are provided on the top peripheral side of the base 20;

The support seat 30 is rotatably arranged on the top of the base 20 with its bottom, and a transmission part 31 is formed at the bottom of the support seat 30;

The base joint frame 40, as shown in Figure 4, is screwed at the bottom and fixed on the top of the support seat 30, and the top of the base joint frame 40 is shaped as a rectangular assembly end face 41, and through a plurality of assembly bolts (not shown) assembled with the standard joint frame A1; in this embodiment, as shown in Figure 3A and Figure 3B, each of the standard joint frames A1 of the tower body A is a rectangular parallelepiped structure and has the two rectangular End face A11, the assembly end face A11 of the standard joint frame A1 is assembled with the assembly end face 41 of the basic joint frame 40, the standard joint frame A1 and the assembly end faces A11, 41 of the basic joint frame 40 each have two opposite The long side a is opposite to the two short sides b, the length of the long side a is 1.3 to 9 times the length of the short side b, and the boom D is arranged on the side of the cage cage B along the extending direction of the two long sides a;

The power unit 50, as shown in Figure 4 and Figure 5, includes two power sources 51 fixed on the two mounting seats 23 of the base 20, and a transmission belt 52 fixed on the transmission part 31 of the supporting seat 30, in this In the embodiment, the transmission belt 52 is formed with a tooth surface 521, and each of the two power sources 51 is provided with a driving gear 511, so that the driving gear 511 meshes with the tooth surface 521 of the transmission belt 52 to drive the supporting base 30 and the base frame 40 to rotate; in addition, the transmission belt 52 and the transmission portion 31 of the support base 30 have a plurality of bolts 522 inserted and locked.

The above is the description of the main components and configurations of the embodiment of the present invention. As for the operation mode and function of the preferred embodiment of the present invention, the following description will be made.

The operation mode of the downward-rotating slewing mechanism of the tower crane of the present invention is shown in Fig. 3A in conjunction with Fig. 4 and Fig. 5; The two power sources 51 are arranged on the opposite sides of the 20, and the drive belt 52 with the tooth surface 521 is assembled on the bottom peripheral side of the support seat 30, so that the drive gear 511 of the two power sources 51 is meshed with the tooth surface 521 of the transmission belt 52 , thereby, the two power sources 51 use their drive gears 511 to pull the transmission belt 52 to move, and then drive the supporting seat 30 fixed with the transmission belt 52, and the tower body A connected to the base joint frame 40 is rotated in linkage, The purpose of making the horizontal boom D centered on the tower body A and rotate simultaneously is achieved.

Thereby, as shown in FIG. 3A and FIG. 3B in conjunction with FIG. 7 , the present invention is shaped to have two relatively long sides a and two It is relatively rectangular with the short side b, and one end of the boom D is assembled on the cage B so that one end of the boom D corresponds to the short side b, so that when the boom D rotates with the tower body 11, the two lengths along the rectangle can be maintained. The extended position of side a achieves the purpose of increasing the support strength and stability of the boom D provided by the tower body A.

In addition, since the lifting range of the tower crane is roughly proportional to the support strength of the tower body A, the present invention also uses the foundation joint frame 40 and the standard joint frame A1 assembly end face 41, the long side a of A11 and The short side b has a length ratio of 1.3 to 9 (that is, a/b=1.3~9), so that when the tower crane requires a large lifting range, use the one with a larger length ratio (a/b) between the long side and the short side. The base joint frame 40 and the standard joint frame A1, if the lifting range is small, the base joint frame 40 and the standard joint frame A1 with a smaller ratio are used to effectively increase the load-bearing capacity of the tower crane.

To sum up, through the above-mentioned structure, the present invention installs the slewing mechanism C at the bottom of the tower body A, and makes the moving arm D corresponding to the short side b of the tower body A assembled on the side of the sleeve cage B, which not only makes The center of gravity of the tower body A and its structural strength are more stable, and the assembled end faces 41 and A11 of the foundation joint frame 40 and the standard joint frame A1 are shaped into rectangles, which also provide stable support for the boom D during lifting operations Strength and lifting performance, and the cage cage B can be raised and lowered along the tower body A through the counterweight means, so that the driver's cab D1 installed on the boom D is lowered to the ground, which is convenient for personnel to enter and exit the driver's cab D1 operation, increasing work Operational safety of personnel.

The present invention has been described in detail through specific implementations and examples above, but these are not intended to limit the present invention. Without departing from the principle of the present invention, those skilled in the art can also make many modifications and improvements, which should also be regarded as the protection scope of the present invention.

Claims (4)

1. a downside rotation type electro swing type mechanism for tower crane, this hoisting crane mainly has a tower body, and described tower body has multiple standard knot frame composition, and it is outside that a stock cage is sheathed on described tower body, and bottom described stock cage, side is provided with the swing arm of a horizontal-extending; It is characterized in that:

Be provided with single-revolution mechanism bottom described tower body, described swing type mechanism comprises:

One pedestal, bottom is fixedly arranged on a ground, and all sides, described pedestal top are provided with two relative mount pads;

One supporting base, bottom and described pedestal top set firmly, and are configured as a driving section outside described supporting base bottom peripheral edge;

One base section frame, be fixedly arranged on described supporting base top, described base section top of the trellis is formed with an oblong group and establishes two oblong groups of end face and described standard knot frame to establish end face group to connect, the group of described standard knot frame and described base section frame establishes end face respectively to have relative two long limits and relative two minor faces, and described long edge lengths is 1.3 to 9 times of described bond length;

One power unit, two mount pads comprising two propulsions source and described pedestal set firmly, and one drive belt ring be around in described pedestal top week side setting firmly with the driving section of described supporting base, described propulsion source drives described driving band to drive described supporting base, base section frame and tower body to rotate, and makes described swing arm with described tower body for axle center is with dynamic.

2. the downside rotation type electro swing type mechanism of tower crane as claimed in claim 1, it is characterized in that: described base bottom is formed with one group and establishes portion, establish for described group and there is between portion and described ground a fixing diskware fix, described fixing diskware is formed with a junction and a fixed part, the described pedestal group portion of establishing is fixedly arranged on the connecting portion of described fixing diskware, multiple pilot pin places described pedestal group and establishes the connecting portion of portion and described fixing diskware to lock to tie, and the fixed part of described fixing diskware is that multiple holding-down bolt places and locks with described ground.

3. the downside rotation type electro swing type mechanism of tower crane as claimed in claim 1, it is characterized in that: the driving band of described power unit is formed with a flank of tooth, described two propulsions source are respectively provided with a driven wheel, and described driven wheel and described driving band flank engagement are to drive described supporting base turn.

4. the downside rotation type electro swing type mechanism of tower crane as claimed in claim 1, is characterized in that: between the driving band of described power unit and the driving section of described supporting base having multiple spigot and place described driving section and lock with described driving band.