Rotary limiting mechanism of crane rotary table

Abstract

The utility model provides a crane rotary table rotation limiting mechanism, which relates to the technical field of crane rotary tables and comprises a rotary table body, fixing pins are inserted in a circle of the inner wall of the rotary table body, a positioning mechanism is connected to the middle of the top end of the rotary table body, and a top plate is arranged above the positioning mechanism. The limiting mechanism comprises an X support, the X support is installed above the top plate, a locking screw is inserted into the center end of the X support, electric telescopic rods are arranged on the two sides of the X support, threaded rings are installed at the driving ends of the electric telescopic rods, and limiting teeth are connected to the bottoms of the threaded rings. Clamping grooves are formed in the two sides of the top end of the top plate; the top end of the clamping groove is provided with a mounting assembly, through tooth pitch clamping of the limiting teeth and the large gear, mechanical precise limiting is achieved, it is ensured that the rotation angle of the rotary table is controlled within a preset range, and the problem of excessive rotation or out-of-control is avoided.

Description

Technical Field

[0001] This utility model relates to the field of crane turntable technology, and in particular to a crane turntable rotation limiting mechanism. Background Technology

[0002] Traditional limit mechanisms are prone to failure due to mechanical wear, insufficient sensor accuracy, or lagging control algorithms, making it difficult to accurately control the rotation angle of the turntable. When rotating rapidly or under changing load, the limit mechanism is prone to failure, which can lead to unexpected rotation or loss of control of the turntable, posing a safety hazard.

[0003] Therefore, this utility model provides a crane turntable rotation limiting mechanism. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a crane turntable rotation limiting mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a crane turntable rotation limiting mechanism, comprising a turntable body, wherein a fixing pin is inserted around the inner wall of the turntable body, a positioning mechanism is connected to the top center of the turntable body, and a top plate is provided above the positioning mechanism.

[0006] The limiting mechanism includes an X-bracket, which is installed above the top plate. A locking screw is inserted at the center end of the X-bracket. Electric telescopic rods are provided on both sides of the X-bracket, and threaded rings are installed at the drive end of the electric telescopic rods. Limiting teeth are connected to the bottom of the threaded rings.

[0007] The top plate has slots on both sides of its top end; the top of the slots is provided with mounting components.

[0008] In a preferred embodiment, the X-bracket is connected to the electric telescopic rod and the top plate via locking screws to form a disassembly structure, and the threaded ring is connected to the limiting teeth.

[0009] The technical effect of adopting the above-mentioned further solution is as follows: By opening the electric telescopic rod, the threaded ring of the electric telescopic rod and the limiting tooth move downwards simultaneously, engaging the tooth frame of the limiting tooth into the tooth pitch of the large gear. This further limits and reinforces the large gear and the positioning tooth of the turntable body, preventing the rotation angle of the large gear and the positioning tooth. This method can precisely control the rotation angle of the top plate of the turntable body, effectively preventing accidental rotation or loss of control during operation. This safety mechanism protects the safety of operators and equipment, reduces potential accident risks, and precise control ensures that the device will not exceed the predetermined rotation range during operation, thereby avoiding mechanical damage or operational errors caused by excessive rotation.

[0010] In a preferred embodiment, four sets of limiting teeth are provided, and the limiting teeth have a serrated structure.

[0011] The technical advantage of adopting the above-mentioned further solution is that the threaded ring and the limiting tooth are designed as a detachable structure. The detachable design allows the limiting tooth to be quickly replaced or adjusted according to different operational needs. For example, when it is necessary to change the rotation range or accuracy of the turntable, only the limiting tooth of different specifications needs to be replaced, without replacing the entire limiting mechanism. The threaded ring and the limiting tooth are threadedly installed at the bottom of the electric telescopic rod. When the limiting tooth is worn, the user can replace the threaded ring of the limiting tooth separately from the bottom of the electric telescopic rod. This design greatly improves the flexibility and maintainability of the limiting tooth.

[0012] In a preferred embodiment, the positioning mechanism includes a large gear, which is mounted above the turntable body. Positioning teeth are provided on both sides of the large gear, and a rotary motor is mounted on the top of the positioning teeth.

[0013] The technical effect of adopting the above-mentioned further solution is that a positioning mechanism is set at the top of the turntable body. By turning on the rotary motor, two sets of positioning teeth are driven to rotate on the large gear. The two sets of positioning teeth work together with the large gear to drive the top plate at the top of the turntable body to rotate and adjust, so as to precisely control the rotation angle of the top plate and ensure the accuracy of positioning.

[0014] In a preferred embodiment, the teeth of the large gear and the positioning teeth mesh with each other. The positioning teeth are used to precisely control the rotation angle. The positioning teeth, together with the large gear and the top plate, form a rotating structure via a rotary motor.

[0015] The technical effect of adopting the above-mentioned further solution is that when the positioning tooth stops rotating, it can accurately lock the position of the large gear, ensuring that the turntable body stops at a predetermined angle. Through the precise meshing of the positioning tooth, the error in the positioning process can be reduced, ensuring the consistency of the stopping position each time, and improving the accuracy and repeatability of the operation.

[0016] In a preferred embodiment, the mounting assembly includes a mounting platform, which is mounted on top of the top plate and the slot. Clips are connected to both sides of the bottom end of the mounting platform, and a fixing bolt passes through the middle of the mounting platform and the clips.

[0017] The technical effect of adopting the above-mentioned further solution is that slots are provided on both sides of the top of the top plate. The slots are used to install and fix the installation components, ensuring that the external equipment can be stably installed on the turntable body and the installation components for installation.

[0018] In a preferred embodiment, the mounting platform is fixed by fixing bolts and clips, and the clips are symmetrically distributed about the center line of the mounting platform.

[0019] The technical effect of adopting the above-mentioned further solution is that the clamp of the mounting platform is engaged with the slot of the top plate to ensure that it will not move or fall off during operation, and the fixing bolts are inserted into the slots of the mounting platform, the clamp and the top plate to ensure the stability of the installation.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0021] By activating the electric telescopic rod, the threaded ring and the limiting tooth of the electric telescopic rod move downwards simultaneously, engaging the tooth frame of the limiting tooth within the tooth pitch of the large gear. This provides a second layer of limiting and reinforcement to the large gear and the positioning tooth of the turntable body, preventing the rotation angle of the large gear and the positioning tooth. This method can precisely control the rotation angle of the top plate of the turntable body, effectively preventing accidental rotation or loss of control during operation. This safety mechanism protects the safety of operators and equipment, reduces potential accident risks, and ensures that the device does not exceed the predetermined rotation range during operation, thereby avoiding mechanical damage or operational errors caused by excessive rotation. The threaded ring and the limiting tooth are designed as a detachable structure. The detachable design allows the limiting tooth to be quickly replaced or adjusted according to different operational needs. For example, when it is necessary to change the rotation range or accuracy of the turntable, only the limiting tooth of different specifications needs to be replaced, without replacing the entire limiting mechanism. This design greatly improves the flexibility and maintainability of the limiting tooth. By regularly replacing the worn limiting tooth, the service life of the entire limiting mechanism can be extended, reducing the frequency of equipment replacement and further reducing costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a diagram showing the internal structure of the turntable body of this utility model;

[0024] Figure 3 This is a partially enlarged structural view of the limiting mechanism of this utility model;

[0025] Figure 4 This is a top view of the turntable body of this utility model.

[0026] The components include: 1. Turntable body; 2. Fixing pin; 3. Positioning mechanism; 301. Large gear; 302. Positioning tooth; 303. Rotary motor; 4. Top plate; 5. Limiting mechanism; 501. X-bracket; 502. Locking screw; 503. Electric telescopic rod; 504. Threaded ring; 505. Limiting tooth; 6. Slot; 7. Mounting assembly; 701. Mounting platform; 702. Clamp; 703. Fixing bolt. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model provides a technical solution: a crane turntable rotation limiting mechanism, including a turntable body 1, a turntable body 1, a fixing pin 2 inserted around the inner wall of the turntable body 1, a positioning mechanism 3 connected to the top center of the turntable body 1, and a top plate 4 provided above the positioning mechanism 3.

[0030] The limiting mechanism 5 includes an X-bracket 501, which is installed above the top plate 4. A locking screw 502 is inserted at the center end of the X-bracket 501. Electric telescopic rods 503 are provided on both sides of the X-bracket 501, and a threaded ring 504 is installed at the drive end of the electric telescopic rod 503. The bottom of the threaded ring 504 is connected to a limiting tooth 505.

[0031] The top plate 4 has slots 6 on both sides; the top of the slots 6 is equipped with mounting components 7. Specifically, firstly, the turntable body 1 is the core support structure of the entire device. Fixing pins 2 are used to fix the turntable body 1 to the base platform or ground, ensuring the stability of the device during use and preventing unnecessary movement. A positioning mechanism 3 is set at the top of the turntable body 1. By turning on the rotary motor 303, two sets of positioning teeth 302 are driven to rotate on the large gear 301. The two sets of positioning teeth 302 work in conjunction with the large gear 301 to rotate and adjust the top plate 4 at the top of the turntable body 1, precisely controlling the rotation angle of the top plate 4 to ensure accurate positioning. When the positioning teeth 302 stop rotating, it can accurately... The positioning gear 301 is locked in position to ensure that the turntable body 1 stops at a predetermined angle. The precise meshing of the positioning gear 302 reduces positioning errors, ensures consistency in the stopping position each time, and improves the accuracy and repeatability of the operation. A top plate 4 is provided at the top of the positioning mechanism 3, located on top of the turntable body 1, providing additional support and protection to prevent external objects from entering the internal components and enhancing the overall structural stability. An X-bracket 501 is provided at the center of the top of the top plate 4, fixed to the top plate 4 to support the entire assembly of the limiting mechanism 5. The X-bracket 501 is locked to the upper middle part of the top plate 4 with locking screws 502. Four sets of electric telescopic rods 503 are respectively provided at the lower ends of the four corners of the X-bracket 501. By activating the electric telescopic rod 503, the threaded ring 504 of the electric telescopic rod 503 and the limiting tooth 505 move downwards simultaneously, engaging the tooth frame of the limiting tooth 505 within the tooth pitch of the large gear 301. This further restricts and reinforces the large gear 301 and the positioning tooth 302 of the turntable body 1, preventing the rotation angle of the large gear 301 and the positioning tooth 302. This method can precisely control the rotation angle of the top plate 4 at the top of the turntable body 1, effectively preventing accidental rotation or loss of control during operation. This safety mechanism protects the safety of operators and equipment, reduces potential accident risks, and ensures that the device does not exceed the predetermined rotation range during operation, thereby avoiding mechanical damage or operational errors caused by excessive rotation. Incorrect. The threaded ring 504 and the limiting tooth 505 are designed as a detachable structure. This detachable design allows the limiting tooth 505 to be quickly replaced or adjusted according to different operational needs. For example, when it is necessary to change the rotation range or accuracy of the turntable, only the limiting tooth 505 of a different specification needs to be replaced, without replacing the entire limiting mechanism 5. The threaded ring 504 and the limiting tooth 505 are threadedly installed at the bottom end of the electric telescopic rod 503. When the limiting tooth 505 becomes worn, the user can replace the threaded ring 504 of the limiting tooth 505 separately from the bottom end of the electric telescopic rod 503. This design greatly improves the flexibility and maintainability of the limiting tooth 505. By regularly replacing the worn limiting tooth 505, the service life of the entire limiting mechanism 5 can be extended.To reduce equipment replacement frequency and further lower costs, slots 6 are provided on both sides of the top of the top plate 4. These slots 6 are used to install and secure the mounting assembly 7, ensuring that external equipment can be securely installed on the turntable body 1 and the mounting assembly 7. The mounting platform 701's clamps 702 engage with the slots 6 on the top plate 4, ensuring it will not move or fall off during operation. Fixing bolts 703 pass through the mounting platform 701, clamps 702, and slots 6 on the top plate 4, ensuring the stability of the installation. This technical solution solves the problems of inaccurate rotation limit of the crane turntable body 1, insufficient safety, and inconvenient maintenance. It achieves precise mechanical limiting through the engagement of the limit gear 505 with the large gear 301, ensuring the turntable rotation angle is controlled within a predetermined range and preventing excessive rotation or loss of control. The electric telescopic rod 503 is activated to drive the electric telescopic rod. The threaded ring 504 and the limiting tooth 505 move downwards simultaneously, engaging the tooth frame of the limiting tooth 505 within the tooth pitch of the large gear 301. This further reinforces and limits the rotation angle of the large gear 301 and the positioning tooth 302 of the turntable body 1, preventing their rotation. This method precisely controls the rotation angle of the top plate 4 at the top of the turntable body 1, effectively preventing accidental rotation or loss of control during operation. This safety mechanism protects the safety of operators and equipment, reduces potential accident risks, and ensures that the device does not exceed the predetermined rotation range during operation, thus avoiding mechanical damage or operational errors caused by excessive rotation. The threaded ring 504 and the limiting tooth 505 are designed as detachable structures, allowing the limiting tooth 505 to be quickly replaced or adjusted according to different operational needs.

[0032] Going a step further, such as Figure 1 As shown: It also includes an installation component 7, including a mounting platform 701. The mounting platform 701 is installed on the top of the top plate 4 and the slot 6. The bottom of the mounting platform 701 is connected to the two sides of the bottom end with clips 702. A fixing bolt 703 passes through the middle of the mounting platform 701 and the clips 702. The advantage of this technical solution is that the top of the top plate 4 has slots 6 on both sides. The slots 6 are used to install and fix the installation component 7, ensuring that the external equipment can be stably installed on the turntable body 1 and the installation component 7. The clips 702 of the mounting platform 701 are engaged with the slots 6 of the top plate 4, ensuring that it will not move or fall off during operation. The fixing bolt 703 passes through the mounting platform 701, the clips 702 and the slots 6 of the top plate 4, ensuring the stability of the installation.

[0033] The above solutions still have the problem of not being able to ensure that the turntable body 1 stops at the predetermined angle, such as... Figure 1 and Figure 2As shown: In this scheme, the positioning mechanism 3 includes a large gear 301, which is installed above the turntable body 1. Positioning teeth 302 are provided on both sides of the large gear 301, and a rotary motor 303 is installed at the top of each positioning tooth 302. The positioning mechanism 3, located at the top of the turntable body 1, drives the two sets of positioning teeth 302 to rotate on the large gear 301 by activating the rotary motor 303. The two sets of positioning teeth 302, in cooperation with the large gear 301, rotate and adjust the top plate 4 at the top of the turntable body 1. This precisely controls the rotation angle of the top plate 4, ensuring accurate positioning. When the positioning teeth 302 stop rotating, they precisely lock the position of the large gear 301, ensuring the turntable body 1 stops at a predetermined angle. The precise meshing of the positioning teeth 302 reduces errors during positioning, ensures consistency in the stopping position each time, and improves the accuracy and repeatability of the operation.

[0034] Working principle:

[0035] like Figure 1-4 As shown:

[0036] First, the turntable body 1 is the core support structure of the entire device. Fixing pins 2 are used to secure the turntable body 1 to the base platform or ground, ensuring the stability of the device during use and preventing unnecessary movement. A positioning mechanism 3 is installed at the top of the turntable body 1. By activating the rotary motor 303, two sets of positioning teeth 302 are driven to rotate on the large gear 301. The two sets of positioning teeth 302, in cooperation with the large gear 301, drive the top plate 4 at the top of the turntable body 1 to rotate and adjust precisely, ensuring accurate positioning by controlling the rotation angle of the top plate 4. When the positioning teeth 302 stop rotating, they precisely lock the position of the large gear 301, ensuring that the turntable body 1 stops at a predetermined angle. The precise engagement of 302 reduces errors during positioning, ensures consistency in the stopping position each time, and improves the accuracy and repeatability of operation. A top plate 4 is provided at the top of the positioning mechanism 3, located on top of the turntable body 1, providing additional support and protection to prevent external objects from entering the internal components and enhancing the overall structural stability. An X-bracket 501 is provided at the center of the top of the top plate 4, fixed to it to support the entire assembly of the limiting mechanism 5. The X-bracket 501 is locked to the upper middle part of the top plate 4 with locking screws 502. Four sets of electric telescopic rods 503 are respectively provided at the lower ends of the four corners of the X-bracket 501. By opening the electric telescopic rods 503, the threaded rings 504 of the electric telescopic rods 503 are driven to engage with the limiting mechanism. Simultaneously, tooth 505 moves downward, engaging the tooth frame of limiting tooth 505 within the tooth pitch of the large gear 301. This further reinforces and limits the rotation angle of the large gear 301 and positioning tooth 302 on the turntable body 1, preventing their rotation. This method precisely controls the rotation angle of the top plate 4 at the top of the turntable body 1, effectively preventing accidental rotation or loss of control during operation. This safety mechanism protects the safety of operators and equipment, reduces potential accident risks, and ensures that the device does not exceed the predetermined rotation range during operation, thus avoiding mechanical damage or operational errors caused by excessive rotation. The threaded ring 504 and limiting tooth 505 are designed as detachable structures, which allows for... The limiting tooth 505 can be quickly replaced or adjusted according to different operational needs. For example, when it is necessary to change the rotation range or accuracy of the turntable, only the limiting tooth 505 of different specifications needs to be replaced, without replacing the entire limiting mechanism 5. The limiting tooth 505 is threadedly installed at the bottom end of the electric telescopic rod 503 via a threaded ring 504. When the limiting tooth 505 is worn, the user can replace the threaded ring 504 of the limiting tooth 505 separately from the bottom end of the electric telescopic rod 503. This design greatly improves the flexibility and maintainability of the limiting tooth 505. By regularly replacing the worn limiting tooth 505, the service life of the entire limiting mechanism 5 can be extended, the equipment replacement frequency can be reduced, and costs can be further reduced. The top plate 4 has slots 6 on both sides of its top end.The slot 6 is used to install and secure the mounting assembly 7, ensuring that the external equipment can be securely mounted on the turntable body 1 and the mounting assembly 7. The mounting platform 701's clips 702 engage with the slot 6 on the top plate 4, ensuring it will not move or fall off during operation. Fixing bolts 703 pass through the mounting platform 701, clips 702, and the slot 6 on the top plate 4, ensuring the stability of the installation.

[0037] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A crane turntable rotation limiting mechanism, comprising a turntable body (1), characterized in that: The turntable body (1) has a fixing pin (2) inserted around its inner wall, and a positioning mechanism (3) is connected to the top center of the turntable body (1). A top plate (4) is provided above the positioning mechanism (3). The limiting mechanism (5) includes an X-bracket (501), which is installed above the top plate (4). A locking screw (502) is inserted at the center end of the X-bracket (501). Electric telescopic rods (503) are provided on both sides of the X-bracket (501), and a threaded ring (504) is installed at the drive end of the electric telescopic rod (503). The bottom of the threaded ring (504) is connected to a limiting tooth (505). The top plate (4) has slots (6) on both sides of its top end; the top of the slots (6) is provided with mounting components (7).

2. The crane turntable rotation limiting mechanism according to claim 1, characterized in that: The X-bracket (501) is connected to the electric telescopic rod (503) and the top plate (4) by locking screws (502) to form a disassembly structure, and the threaded ring (504) is connected to the limiting tooth (505).

3. The crane turntable rotation limiting mechanism according to claim 1, characterized in that: The limiting teeth (505) are provided in four sets, and the limiting teeth (505) have a sawtooth structure.

4. The crane turntable rotation limiting mechanism according to claim 1, characterized in that: The positioning mechanism (3) includes a large gear (301), which is installed above the turntable body (1). Positioning teeth (302) are provided on both sides of the large gear (301), and a rotary motor (303) is installed at the top of the positioning teeth (302).

5. A crane turntable rotation limiting mechanism according to claim 4, characterized in that: The teeth of the large gear (301) and the positioning tooth (302) mesh with each other. The positioning tooth (302) is used to precisely control the rotation angle. The positioning tooth (302) forms a rotating structure with the large gear (301) and the top plate (4) through the rotary motor (303).

6. The crane turntable rotation limiting mechanism according to claim 1, characterized in that: The mounting assembly (7) includes a mounting platform (701), which is mounted on the top of the top plate (4) and the slot (6). The mounting platform (701) is connected to clips (702) on both sides of its bottom end, and a fixing bolt (703) passes through the middle of the mounting platform (701) and the clips (702).

7. A crane turntable rotation limiting mechanism according to claim 6, characterized in that: The mounting platform (701) is fixed by fixing bolts (703) and clips (702), and the clips (702) are symmetrically distributed about the center line of the mounting platform (701).

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