Rotation locking mechanism of tower crane

Abstract

The utility model relates to the technical field of crane rotation locking mechanisms, in particular to a tower crane rotation locking mechanism which comprises a lower support, the upper end face of the lower support is rotationally connected with a driven gear located below an upper support, and a plurality of first grooves which are evenly distributed are formed in the upper end face of the lower support. The interiors of the multiple first grooves are slidably connected with moving blocks, and the opposite side walls of the multiple moving blocks are provided with teeth connected with the driven gear in an engaged mode. A driven gear rotates in a small range, so that teeth on the outer wall of the driven gear are aligned with teeth mounted on one side wall of a moving block, then a plurality of electric telescopic rods drive a plurality of moving blocks to move upwards, the moving blocks are moved out of a plurality of first grooves, and the teeth mounted on one side wall of each moving block are engaged with the teeth on the outer wall of the driven gear; and the driven gear is locked through the mutual matching of the teeth formed on one side wall of the plurality of moving blocks and the teeth on the outer wall of the driven gear, so that the slewing mechanism of the tower crane is locked.

Description

Technical Field

[0001] The utility model relates to the technical field of crane slewing locking mechanisms, in particular to a tower crane slewing locking mechanism. Background Art

[0002] A slewing mechanism is a mechanism that enables the rotating portion of a crane or other machinery to rotate about its centerline, cooperating with other mechanisms to complete cargo transport tasks or other work cycles. It consists of a drive unit, a transmission, and a slewing bearing. The slewing locking mechanism maintains the turntable in its initial or specific position, preventing the reducer's hydraulic lock from slipping and causing uncontrolled rotation during crane transport.

[0003] Existing tower crane slewing locking mechanisms mostly lock the slewing mechanism of the tower crane by locking a pin. The locking process requires manual operation, the locking process is cumbersome, and the positions of the pin and the socket are fixed, so the slewing mechanism of the tower crane can only be locked at a specified or initial position. Utility Model Content

[0004] The utility model aims to provide a tower crane slewing locking mechanism, which has the characteristics of automatically locking the tower crane slewing mechanism and locking the tower crane slewing mechanism at any position.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a slewing locking mechanism for a tower crane, comprising a lower support, wherein the upper end surface of the lower support is fixedly connected to the upper support, the upper end surface of the lower support is rotatably connected to a driven gear located below the upper support, the upper end surface of the lower support is provided with a plurality of evenly distributed first grooves, the interiors of the plurality of first grooves are all slidably connected to moving blocks, and the opposite side walls of the plurality of moving blocks are each provided with teeth meshing with the driven gear;

[0006] A through hole is formed through the upper end surface of the upper support, a connecting column is fixedly connected to the upper end surface of the driven gear, and the upper end of the connecting column passes through the through hole and is fixedly connected to a turntable located above the upper support.

[0007] In order to drive the driven gear to rotate, as a preferred slewing locking mechanism of a tower crane of the present invention, the upper end surface of the lower support is rotatably connected to a driving gear meshing with the driven gear, and a motor is installed inside the lower support, and the output end of the motor is fixedly connected to the driving gear.

[0008] In order to drive the moving block to move, as a preferred slewing locking mechanism of a tower crane of the present invention, a second groove is provided on the lower end surface of the moving block, and an electric telescopic rod is installed between the inner upper end of the second groove and the inner lower end of the first groove.

[0009] In order to ensure the smooth rotation of the driven gear, as a preferred embodiment of the slewing locking mechanism of a tower crane of the present invention, the driven gear is rotatably connected to the lower support via an annular limiting sliding groove and an annular limiting sliding block.

[0010] In order to limit the moving block, as a preferred slewing locking mechanism of a tower crane of the present invention, the first groove and the moving block are slidably connected via a limiting groove and a limiting block.

[0011] In order to prevent the moving block from rotating in the first groove, as a preferred embodiment of the slewing locking mechanism of a tower crane of the present invention, the cross sections of the first groove and the moving block are both fan-shaped structures.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] When locking the slewing mechanism of the tower crane, the motor drives the driving gear to rotate slightly, and the driving gear drives the driven gear to rotate slightly, so that the teeth on the outer wall of the driven gear are aligned with the teeth installed on the side wall of the moving block, and then the multiple electric telescopic rods extend, and the multiple electric telescopic rods drive the multiple moving blocks to move upward, and the multiple moving blocks are moved out of the multiple first grooves, so that the teeth installed on the side wall of the moving block are engaged with the teeth on the outer wall of the driven gear. Through the mutual cooperation between the teeth opened on the side wall of the multiple moving blocks and the teeth on the outer wall of the driven gear, the driven gear is locked, and then the slewing mechanism of the tower crane is locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0016] Figure 3 This is a schematic diagram of a partial top-view cross-sectional structure of the utility model;

[0017] In the figure: 1. Lower support; 2. Upper support; 3. Driven gear; 4. First groove; 5. Moving block; 6. Teeth; 7. Through hole; 8. Connecting column; 9. Turntable; 10. Driving gear; 11. Motor; 12. Second groove; 13. Electric telescopic rod. DETAILED DESCRIPTION

[0018] The present invention is further described below with reference to the accompanying drawings and specific embodiments to facilitate understanding of the present invention. The methods used in the present invention are conventional methods unless otherwise specified; the raw materials and devices used are conventional commercially available products unless otherwise specified.

[0019] See also Figures 1 to 3 A slewing locking mechanism for a tower crane includes a lower support 1, the upper end surface of which is fixedly connected to an upper support 2. The upper end surface of the lower support 1 is rotatably connected to a driven gear 3 located below the upper support 2. The upper end surface of the lower support 1 is provided with a plurality of evenly distributed first grooves 4, each of which is slidably connected to a moving block 5. The opposite side walls of the moving blocks 5 are each equipped with teeth 6 that mesh with the driven gear 3. A through hole 7 is formed through the upper end surface of the upper support 2, and a connecting column 8 is fixedly connected to the upper end surface of the driven gear 3. The upper end of the connecting column 8 passes through the through hole 7 and is fixedly connected to a slewing platform 9 located above the upper support 2.

[0020] In this embodiment, when locking the slewing mechanism of the tower crane, the driven gear 3 is rotated slightly so that the teeth on the outer wall of the driven gear 3 are aligned with the teeth 6 provided on the side wall of the moving block 5. Then, the multiple moving blocks 5 are moved upward and removed from the multiple first grooves 4 so that the teeth 6 installed on the side wall of the moving block 5 are engaged with the teeth on the outer wall of the driven gear 3. The driven gear 3 is locked by the mutual cooperation between the teeth 6 installed on the side wall of the multiple moving blocks 5 and the teeth on the outer wall of the driven gear 3, thereby locking the slewing mechanism of the tower crane.

[0021] When the rotary mechanism needs to operate, multiple moving blocks 5 move downward, so that the teeth 6 installed on one side wall of the moving block 5 are disengaged from the teeth on the outer wall of the driven gear 3, and the moving block 5 completely enters the first groove 4, and then the driven gear 3 rotates, and the driven gear 3 cooperates with the connecting column 8 to drive the turntable 9 to rotate, thereby making the rotary mechanism operate.

[0022] As a technical optimization solution of the present invention, the upper end surface of the lower support 1 is rotatably connected to a driving gear 10 that meshes with the driven gear 3. A motor 11 is installed inside the lower support 1, and the output end of the motor 11 is fixedly connected to the driving gear 10.

[0023] In this embodiment, the motor 11 is started, the motor 11 drives the driving gear 10 to rotate, and the driving gear 10 drives the driven gear 3 to rotate.

[0024] As a technical optimization solution of the present invention, a second groove 12 is formed on the lower end surface of the moving block 5 , and an electric telescopic rod 13 is installed between the inner upper end of the second groove 12 and the inner lower end of the first groove 4 .

[0025] In this embodiment, the electric telescopic rod 13 is started, the electric telescopic rod 13 extends, and the electric telescopic rod 13 drives the moving block 5 to move. The second groove 12 can accommodate the electric telescopic rod 13, so that the moving block 5 completely enters the first groove 4.

[0026] As a technical optimization solution of the present invention, the driven gear 3 and the lower support 1 are rotationally connected via an annular limiting sliding groove and an annular limiting sliding block.

[0027] In this embodiment, the annular limiting groove and the annular limiting sliding block can enable the driven gear 3 to rotate smoothly.

[0028] As a technical optimization solution of the present invention, the first groove 4 and the moving block 5 are slidably connected via a limiting groove and a limiting block.

[0029] In this embodiment, the limiting groove and the limiting block can limit the moving block 5 to prevent the moving block 5 from moving out of the first groove 4 .

[0030] As a technical optimization solution of the present invention, the cross sections of the first groove 4 and the moving block 5 are both fan-shaped structures.

[0031] In this embodiment, the cross sections of the first groove 4 and the moving block 5 are both fan-shaped structures, which can prevent the moving block 5 from rotating in the first groove 4 through the mutual cooperation between the first groove 4 and the moving block 5, thereby stably locking the slewing mechanism of the tower crane.

[0032] Working principle:

[0033] When locking the slewing mechanism of the tower crane, the motor 11 is started, and the motor 11 drives the driving gear 10 to rotate slightly, and the driving gear 10 drives the driven gear 3 to rotate slightly, so that the teeth on the outer wall of the driven gear 3 are aligned with the teeth 6 installed on the side wall of the moving block 5, and then the multiple electric telescopic rods 13 are started, and the multiple electric telescopic rods 13 are extended, and the multiple electric telescopic rods 13 drive the multiple moving blocks 5 to move upward, and the multiple moving blocks 5 are moved out of the multiple first grooves 4, so that the teeth 6 installed on the side wall of the moving block 5 are engaged with the teeth on the outer wall of the driven gear 3. The driven gear 3 is locked by the mutual cooperation between the teeth 6 opened on the side wall of the multiple moving blocks 5 and the teeth on the outer wall of the driven gear 3. Since the cross-sections of the first groove 4 and the moving block 5 are both fan-shaped structures, the mutual cooperation between the first groove 4 and the moving block 5 can prevent the moving block 5 from rotating in the first groove 4, thereby stably locking the slewing mechanism of the tower crane, and then locking the slewing mechanism of the tower crane.

[0034] When the slewing mechanism needs to operate, the multiple electric telescopic rods 13 are retracted, and the multiple electric telescopic rods 13 drive the multiple moving blocks 5 to move downward, so that the teeth 6 installed on the side wall of the moving block 5 are disengaged from the teeth on the outer wall of the driven gear 3, and the moving block 5 is completely inserted into the first groove 4, and then the motor 11 is started, the motor 11 drives the driving gear 10 to rotate, the driving gear 10 drives the driven gear 3 to rotate, and the driven gear 3 cooperates with the connecting column 8 to drive the turntable 9 to rotate, thereby making the slewing mechanism operate.

[0035] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] However, the above description is merely a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A slewing locking mechanism for a tower crane, comprising a lower support (1), wherein the upper end surface of the lower support (1) is fixedly connected to an upper support (2), and characterized in that: The upper end surface of the lower support (1) is rotatably connected to a driven gear (3) located below the upper support (2); the upper end surface of the lower support (1) is provided with a plurality of evenly distributed first grooves (4); the interiors of the plurality of first grooves (4) are all slidably connected to moving blocks (5); and the opposite side walls of the plurality of moving blocks (5) are all provided with teeth (6) meshing with the driven gear (3); A through hole (7) is formed through the upper end surface of the upper support (2); a connecting column (8) is fixedly connected to the upper end surface of the driven gear (3); and the upper end of the connecting column (8) passes through the through hole (7) and is fixedly connected to a turntable (9) located above the upper support (2).

2. A tower crane slewing locking mechanism according to claim 1, characterized in that: The upper end surface of the lower support (1) is rotatably connected to a driving gear (10) meshed with a driven gear (3); a motor (11) is installed inside the lower support (1); and the output end of the motor (11) is fixedly connected to the driving gear (10).

3. The slewing locking mechanism for a tower crane according to claim 1, characterized in that: A second groove (12) is provided on the lower end surface of the moving block (5), and an electric telescopic rod (13) is installed between the inner upper end of the second groove (12) and the inner lower end of the first groove (4).

4. The slewing locking mechanism for a tower crane according to claim 1, characterized in that: The driven gear (3) and the lower support (1) are rotationally connected via an annular limiting sliding groove and an annular limiting sliding block.

5. The slewing locking mechanism for a tower crane according to claim 1, characterized in that: The first groove (4) and the moving block (5) are slidably connected via a limiting groove and a limiting block.

6. The slewing locking mechanism for a tower crane according to claim 1, characterized in that: The cross sections of the first groove (4) and the moving block (5) are both fan-shaped structures.

Images