Adjustable counterweight mechanism of building tower crane

Abstract

The utility model provides an adjustable counterweight mechanism of a building tower crane, which comprises a tail frame and a support, and the bottom of the tail frame is fixedly connected with the support. The tower crane has the advantages that the tail frame, namely the balance arm, of the tower crane is improved, the rack and the track structure are mounted on the tail frame, the carrying platform is used for running above the track and is matched with the counterweight cage to bear the counterweight, and the double speed reducing motors are arranged, so that when the speed reducing motors drive the gears to rotate, the gears are movably connected with the rack; by means of the structural design, when the tower crane spire is upwards adjusted, the carrying table moves backwards, when the tower crane spire is downwards pressed, the carrying table moves forwards, and the carrying table is limited through the limiting plate and the buffer column, the output end of the gear motor can be self-locked, and the position of the carrying table on the track can be locked. The balance arm, namely the tail frame and the spire are always located on the same straight line, spire inclination caused by unbalanced weights at the two ends is avoided, and potential safety hazards can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tower cranes, in particular to an adjustable counterweight mechanism for a building tower crane. Background Art

[0002] Tower cranes are essential equipment in the construction field, also known as tower cranes, which are used to lift construction materials such as steel bars, wooden slats, concrete, and steel pipes. The top of the tower crane bears the upper load transmitted by the arm rope and the balance arm rope, and directly transmits it to the tower structure through the rotating tower, turntable, and bearing structure. All upper rotating tower cranes must be equipped with a counterweight, whose function is to support the counterweight to generate a balancing torque in the opposite direction of the lifting torque.

[0003] In addition to the counterweight, a lifting mechanism is often installed at the tail end of the balance arm. The reason why the lifting mechanism is placed at the tail end of the balance arm together with the counterweight is that it can play a partial counterweight role and increase the distance between the rope drum and the tower top guide wheel to facilitate the winding of the wire rope and avoid the occurrence of tangled ropes.

[0004] The amount of counterweight used is inversely proportional to the length of the counterweight arm, and there is a certain proportional relationship between the length of the counterweight arm and the length of the crane arm. The counterweight is quite considerable, generally at least 3 to 4 tons for a light tower crane and nearly 30 tons for a heavy tower crane.

[0005] For the tower cranes commonly used nowadays, the position of the counterweight remains fixed during the lifting process. When the tower tip needs to move toward or away from the revolving tower frame, the tower tip has to move up or down to maintain balance. This places high demands on the stability and toughness of the revolving tower frame, increasing safety risks. Utility Model Content

[0006] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0007] Therefore, one purpose of the utility model is to provide an adjustable counterweight mechanism for a building tower crane to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0008] In order to achieve the above-mentioned object, an embodiment of one aspect of the utility model provides an adjustable counterweight mechanism for a building tower crane, comprising a tail frame and a bracket, wherein the bottom of the tail frame is fixedly connected to the bracket;

[0009] A rack is fixedly connected to the top of the tail frame, the rack is arranged transversely, and a track is fixedly connected to the top of the tail frame;

[0010] A platform is movably connected to the track, a plurality of rollers are installed at the bottom of the platform, and the rollers are movably connected to the surface of the track;

[0011] A reduction motor is fixedly connected at the corner of the top surface of the platform, a gear is fixedly connected to the output end of the reduction motor, one side of the gear is movably connected to the rack, and the reduction motor can be self-locking;

[0012] A counterweight cage is installed at the bottom of the platform, a side ear is fixedly connected to the front of the counterweight cage, and a plurality of counterweight blocks are inserted into the interior of the counterweight cage;

[0013] A long-rod bolt is inserted into the side ear, and one side of the long-rod bolt abuts against the front sides of all the counterweight blocks;

[0014] The end of the track is fixedly connected to a limit plate, and the ends on both sides of the platform are fixedly connected to buffer columns.

[0015] Preferably, any of the above solutions is that the tail frame is welded to the bracket, and the bracket is welded to the middle of the bottom surface of the tail frame.

[0016] Adopting the above technical solution: the device is an adjustable counterweight mechanism of a tower crane, wherein the tail frame is the balance arm of the tower crane.

[0017] Preferably, any of the above schemes is that the rack is located on the inner side of the track, and the carrier is welded or riveted to the counterweight cage.

[0018] Adopting the above technical solution: the core structure of the device is: rack, track, platform, roller, reduction motor, gear, counterweight cage, side ears, counterweight block, and long rod bolt.

[0019] The counterweight block is located in the counterweight cage below the platform. The long-rod bolt is inserted into the two side ears and a nut is fastened on the end thereof. One side of the long-rod bolt abuts against the surface of the counterweight block to prevent the counterweight block from falling off.

[0020] Preferably, from any of the above schemes, the reduction motor is installed vertically, and the gear is located on the inner side of the rack.

[0021] Preferably, any of the above schemes has a socket for inserting a counterweight block inside the counterweight cage, and the counterweight block is arranged vertically.

[0022] The above technical solution is adopted: the tail frame of the tower crane, that is, the balance arm, is improved, and a rack and track structure are installed on it. The top of the track is used to run the platform, and the platform cooperates with the counterweight cage to carry the counterweight. A dual reduction motor is set. When the reduction motor drives the gear to rotate, the gear and the rack are movably connected, so that the platform can move in both directions on the track. The limit plate and the buffer column are used to limit the platform. The output end of the reduction motor can be self-locking, and the position of the platform on the track can be locked. With this structural design, when the tower crane spire is adjusted upward, the platform moves backward, and when the tower crane spire is pressed down, the platform moves forward, so that the balance arm, that is, the tail frame and the tower spire are always in a straight line, avoiding the tip of the tower due to unbalanced weight at both ends. Tilt, which helps to reduce safety hazards.

[0023] Preferably, any of the above schemes is that the counterweight block is a concrete block with a steel plate on the surface, and a nut is threadedly connected to the end of the long rod bolt.

[0024] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0025] The adjustable counterweight mechanism of the building tower crane improves the tail frame, that is, the balance arm, of the tower crane through the coordinated arrangement of a rack, a track, a platform, a roller, a reduction motor, a gear, a counterweight cage, side ears, a counterweight block, and long-rod bolts, on which a rack and a track structure are installed, the track is used to run the platform, the platform cooperates with the counterweight cage to carry the counterweight, a double reduction motor is arranged, when the reduction motor drives the gear to rotate, the gear and the rack are movably connected, so that the platform can move in both directions on the track, the limit plate and the buffer column are used to limit the platform, the output end of the reduction motor can be self-locking, and the position of the platform on the track can be locked. Such a structural design allows the platform to move backward when the tower crane spire is adjusted upward, and to move forward when the tower crane spire is pressed downward, so that the balance arm, that is, the tail frame and the tower spire are always in a straight line, avoiding the tip of the tower being tilted due to unbalanced weight at both ends, which helps to reduce safety hazards.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 It is a structural schematic diagram of the utility model from the first perspective;

[0029] Figure 2 It is a structural schematic diagram of the utility model from a second viewing angle;

[0030] Figure 3It is a structural schematic diagram of the tail frame of the utility model;

[0031] Figure 4 It is a structural schematic diagram of the roller of the utility model.

[0032] In the figure: 1-tail frame, 2-bracket, 3-rack, 4-track, 5-carrier, 6-roller, 7-reduction motor, 8-gear, 9-counterweight cage, 10-side ear, 11-counterweight block, 12-long rod bolt, 13-limiting plate, 14-buffer column. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] like Figure 1-4 As shown, the adjustable counterweight mechanism of the building tower crane comprises a tail frame 1 and a bracket 2, wherein the bottom of the tail frame 1 is fixedly connected with the bracket 2;

[0036] A rack 3 is fixedly connected to the top of the tail frame 1, and the rack 3 is arranged horizontally. A track 4 is fixedly connected to the top of the tail frame 1;

[0037] A platform 5 is movably connected to the track 4, and a plurality of rollers 6 are installed at the bottom of the platform 5, and the rollers 6 are movably connected to the surface of the track 4;

[0038] A reduction motor 7 is fixedly connected to the corner of the top surface of the carrier 5, and a gear 8 is fixedly connected to the output end of the reduction motor 7. One side of the gear 8 is movably connected to the rack 3, and the reduction motor 7 can be self-locking;

[0039] A counterweight cage 9 is installed at the bottom of the platform 5, a side ear 10 is fixedly connected to the front of the counterweight cage 9, and a plurality of counterweight blocks 11 are inserted into the interior of the counterweight cage 9;

[0040] A long-rod bolt 12 is inserted into the side ear 10, and one side of the long-rod bolt 12 abuts against the front side of all the counterweights 11;

[0041] The end of the track 4 is fixedly connected to a limit plate 13 , and the ends of both sides of the platform 5 are fixedly connected to buffer columns 14 .

[0042] Embodiment 1: The tail frame 1 is welded to the bracket 2, and the bracket 2 is welded to the middle part of the bottom surface of the tail frame 1. This device is an adjustable counterweight mechanism for a tower crane, in which the tail frame 1 is the balance arm of the tower crane. The rack 3 is located on the inner side of the track 4, and the platform 5 is welded or riveted to the counterweight cage 6. The core structure of this device is: rack 3, track 4, platform 5, roller 6, reduction motor 7, gear 8, counterweight cage 9, side ear 10, counterweight block 11, long rod bolt 12. The counterweight block 11 is located in the counterweight cage 9 below the platform 5, and the long rod bolt 12 is inserted into the two side ears 10, and a nut is fastened on the end thereof. One side of the long rod bolt 12 abuts against the surface of the counterweight block 11 to prevent the counterweight block 11 from falling off.

[0043] Embodiment 2: The reduction motor 7 is installed vertically, and the gear 8 is located inside the rack 3. The counterweight cage 9 has a socket for inserting the counterweight block 11, and the counterweight block 11 is arranged vertically. The counterweight block is a concrete block with a steel plate on the surface, and a nut is threadedly connected to the end of the long rod bolt 12.

[0044] The working principle of the utility model is as follows:

[0045] The balance arm is improved, and a rack 3 and a track 4 structure are installed on it. The top of the track 4 is used to run the platform 5. The platform 5 cooperates with the counterweight cage 9 to carry the counterweight. A double reduction motor 7 is provided. When the reduction motor 7 drives the gear 8 to rotate, the gear 8 is movably connected with the rack 3, so that the platform 5 can move bidirectionally on the track 4. The limit plate 13 and the buffer column 14 are used to limit the platform 5 to prevent the platform 5 from falling off the track 4.

[0046] When the top of the tower crane is raised, the platform 5 is moved backwards, and when the top of the tower crane is pressed down, the platform 5 is moved forwards, so that the balance arm, that is, the tail frame 1 and the top of the tower are always in a straight line.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] The adjustable counterweight mechanism of the building tower crane is improved through the coordinated arrangement of a rack 3, a track 4, a platform 5, a roller 6, a reduction motor 7, a gear 8, a counterweight cage 9, a side ear 10, a counterweight block 11, and a long rod bolt 12. The tail frame 1 of the tower crane, that is, the balance arm, is installed thereon with a rack 3 and a track 4 structure. The platform 5 is operated above the track 4. The platform 5 cooperates with the counterweight cage 9 to carry the counterweight. A double reduction motor 7 is arranged. When the reduction motor 7 drives the gear 8 to rotate, the gear 8 and the rack 3 move. The dynamic connection can make the platform 5 move in both directions on the track 4. The limit plate 13 and the buffer column 14 are used to limit the platform 5. The output end of the reduction motor 7 can be self-locking, and the position of the platform 5 on the track 4 can be locked. Such a structural design allows the platform 5 to move backward when the tower crane tip is adjusted upward, and allows the platform 5 to move forward when the tower crane tip is pressed down, so that the balance arm, that is, the tail frame 1 and the tower tip are always in a straight line, avoiding the tip of the tower from tilting due to unbalanced weight at both ends, which helps to reduce safety hazards.

Claims

1. An adjustable counterweight mechanism for a building tower crane, characterized in that: It comprises a tail frame (1) and a bracket (2), wherein the bottom of the tail frame (1) is fixedly connected to the bracket (2); A rack (3) is fixedly connected to the top of the tail frame (1), and the rack (3) is arranged transversely. A track (4) is fixedly connected to the top of the tail frame (1); The track (4) is movably connected to a carrier (5), a plurality of rollers (6) are mounted on the bottom of the carrier (5), and the rollers (6) are movably connected to the surface of the track (4); A reduction motor (7) is fixedly connected at a corner of the top surface of the carrier (5); a gear (8) is fixedly connected to the output end of the reduction motor (7); one side of the gear (8) is movably connected to the rack (3); and the reduction motor (7) is self-locking; A counterweight cage (9) is installed at the bottom of the carrier (5), a side ear (10) is fixedly connected to the front of the counterweight cage (9), and a plurality of counterweight blocks (11) are inserted into the interior of the counterweight cage (9); A long-rod bolt (12) is inserted into the side ear (10), and one side of the long-rod bolt (12) abuts against the front side of all the counterweights (11); The end of the track (4) is fixedly connected to a limiting plate (13), and the ends on both sides of the platform (5) are fixedly connected to buffer columns (14).

2. The adjustable counterweight mechanism for a building crane according to claim 1, characterized in that: The tail frame (1) is welded to the bracket (2), and the bracket (2) is welded to the middle part of the bottom surface of the tail frame (1).

3. The adjustable counterweight mechanism for a building crane as claimed in claim 2, characterized in that: The rack (3) is located on the inner side of the track (4), and the carrier (5) is welded or riveted to the counterweight cage (9).

4. The adjustable counterweight mechanism for a building crane as claimed in claim 3, characterized in that: The reduction motor (7) is installed vertically, and the gear (8) is located on the inner side of the rack (3).

5. The adjustable counterweight mechanism for a building crane as claimed in claim 4, characterized in that: The counterweight cage (9) has a socket inside for inserting a counterweight block (11), and the counterweight block (11) is arranged vertically.

6. An adjustable counterweight mechanism for a building crane as claimed in claim 5, characterized in that: The counterweight block is a concrete block with a steel plate on the surface, and a nut is threadedly connected to the end of the long rod bolt (12).

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