Ratchet release device with high torque

Abstract

The utility model relates to a kind of ratchet wheel releasing device with high torque, including base and rotary support, three ratchet teeth, sleeve and ratchet wheel assembly, ratchet tooth rotary disc, releasing telescopic oil cylinder, rotary cantilever and cantilever drive oil cylinder, base and rotary support are on nut, ratchet tooth is installed on ratchet tooth rotary disc, sleeve and ratchet wheel assembly are engaged with ratchet tooth, the front end of releasing telescopic oil cylinder is connected with ratchet tooth rotary disc, the rear end of rotary cantilever is connected with the rear end of releasing telescopic oil cylinder, the upper end of cantilever drive oil cylinder is connected on rotary cantilever, and the bottom end of cantilever drive oil cylinder is fixed on ground. The ratchet wheel releasing device with high torque of the utility model is adopted, by integrating hexagonal sleeve and ratchet wheel on the same shaft, the efficiency of releasing is improved, prestressed pipe pile production can be quickly and effectively released tensioning nut anchored, the time required for releasing process is reduced, can be integrated on automatic equipment, automatic alignment, automatic sleeve nut, automatic releasing, save labor input.

Description

Technical Field

[0001] This utility model relates to the field of industrial automation, and more particularly to the field of prestressed pipe pile production, specifically referring to a ratchet tensioning device with high torque. Background Technology

[0002] Currently, most prestressed concrete pipe pile tensioning still uses highly integrated hydraulic wrenches. Although hydraulic wrenches are small and suitable for manual operation, the small size and low flow rate of the internal cylinders result in slow tensioning speeds. Tensioning a single pipe pile can take 90-120 seconds, making them unsuitable for fast-paced automated production. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a ratchet unwinding device with high torque that is easy to operate and has a wide range of applications.

[0004] To achieve the above objectives, the ratchet unwinding device with high torque of this utility model is as follows: The high-torque ratchet release device is characterized by comprising a base and a slewing support, three ratchet teeth, a sleeve and ratchet assembly, a ratchet rotary disc, a release telescopic cylinder, a slewing cantilever, and a cantilever drive cylinder. The base and slewing support rest on a nut. The ratchet teeth are mounted on the ratchet rotary disc. The sleeve and ratchet assembly mesh with the ratchet teeth. The front end of the release telescopic cylinder is connected to the ratchet rotary disc. The rear end of the slewing cantilever is connected to the rear end of the release telescopic cylinder via a rotating shaft. The front end of the slewing cantilever has two welded rings, which are fitted onto the front and rear sides of the ratchet on the sleeve and ratchet assembly via bearings. The upper end of the cantilever drive cylinder is connected to the slewing cantilever, and the bottom end of the cantilever drive cylinder is fixed to the ground.

[0005] Preferably, the sleeve and ratchet assembly includes a hexagonal sleeve and a ratchet, the hexagonal sleeve and the ratchet are integrated on a single shaft, and the outer ring of the sleeve and ratchet assembly has three ratchet teeth evenly arranged thereon, the ratchet engaging with the ratchet teeth.

[0006] Preferably, the device further includes a ratchet rotary motor, a chain, and a sprocket. The chain is sleeved over the sprocket, and the sprocket is fixed to the end of the sleeve and ratchet assembly by a key pin and rotates synchronously with the ratchet. The ratchet rotary motor is connected to the chain, and the ratchet rotary motor drives the sprocket to rotate through the chain.

[0007] Preferably, the device further includes three telescopic pins, which correspond to three ratchet teeth and are evenly distributed between the ratchet teeth, the sleeve, and the ratchet assembly. The three telescopic pins are all installed in three through holes on the ratchet rotary table, and a compression spring is built into the through hole. The compression spring provides the telescopic pin with continuous pressure to press against the ratchet teeth, so that the ratchet and the ratchet teeth mesh.

[0008] Preferably, the sprocket, sleeve, and ratchet assembly rotate synchronously and adjust their angles. When the sleeve of the sleeve and ratchet assembly is aligned with the nut, the sleeve is fitted into the nut, and the cantilever drive cylinder drives the rotating cantilever. The tensioning cylinder extends, pushes the ratchet rotary disc, and drives the ratchet and hexagonal sleeve to rotate. The tensioning cylinder retracts, driving the ratchet rotary disc and ratchet to rotate.

[0009] This invention employs a high-torque ratchet tensioning device. By integrating the hexagonal sleeve and ratchet onto the same shaft, the structure is simplified. Simultaneously, the outer ring engages with the ratchet through three ratchet teeth, increasing the device's torque capacity. Driven by a large-diameter hydraulic cylinder, the device operates quickly, improving tensioning efficiency. It can rapidly and effectively loosen the tension nuts anchored in the production of prestressed concrete pipe piles, significantly reducing the time required for the tensioning process. Furthermore, this device can be integrated into automated equipment, enabling automatic alignment, automatic nut fitting, and automatic tensioning, saving labor costs. Attached Figure Description

[0010] Figure 1 This is a front view of the ratchet unwinding device with high torque according to this utility model.

[0011] Figure 2 for Figure 1 A sectional view along AA.

[0012] Figure 3 This is an exploded view of the ratchet unwinding device with high torque according to this utility model.

[0013] Figure label: 1. Base and slewing support 2. Ratchets 3 Telescopic pins 4. Sleeve and ratchet assembly 5. Ratchet rotary table 6. Place a telescopic hydraulic cylinder. 7. Slewing cantilever 8. Cantilever drive cylinder 9. Ratchet rotary motor 10 chains 11 Sprocket 12 Anti-torque stop blocks Detailed Implementation

[0014] To more clearly describe the technical content of this utility model, the following description is provided in conjunction with specific embodiments.

[0015] This utility model discloses a high-torque ratchet unloading device, comprising a base and rotary support 1, three ratchet teeth 2, a sleeve and ratchet assembly 4, a ratchet rotary disk 5, an unloading telescopic cylinder 6, a rotary cantilever 7, and a cantilever drive cylinder 8. The base and rotary support 1 rests on a nut. The ratchet teeth 2 are mounted on the ratchet rotary disk 5. The sleeve and ratchet assembly 4 meshes with the ratchet teeth 2. The front end of the unloading telescopic cylinder 6 is connected to the ratchet rotary disk 5. The rear end of the rotary cantilever 7 is connected to the rear end of the unloading telescopic cylinder 6 via a rotating shaft. The front end of the rotary cantilever has two welded rings, which are sleeved on the front and rear sides of the ratchet on the sleeve and ratchet assembly via bearings. The upper end of the cantilever drive cylinder 8 is connected to the rotary cantilever 7, and the bottom end of the cantilever drive cylinder 8 is fixed to the ground.

[0016] In a preferred embodiment of the present invention, the sleeve and ratchet assembly 4 includes a hexagonal sleeve and a ratchet, the hexagonal sleeve and the ratchet are integrated on a shaft, and three ratchet teeth 2 are evenly arranged on the outer ring of the sleeve and ratchet assembly 4, and the ratchet meshes with the ratchet teeth 2.

[0017] In a preferred embodiment of the present invention, the device further includes a ratchet rotary motor 9, a chain 10, and a sprocket 11. The chain 10 is sleeved over the sprocket 11, and the sprocket 11 is fixed to the end of the sleeve and ratchet assembly 4 by a key pin and rotates synchronously with the ratchet 10. The ratchet rotary motor 9 is connected to the chain 10, and the ratchet rotary motor 9 drives the sprocket 11 to rotate through the chain 10.

[0018] In a preferred embodiment of the present invention, the device further includes three telescopic pins 3, which correspond to three ratchet teeth 2 and are evenly distributed between the ratchet teeth 2 and the sleeve and ratchet assembly 4. The three telescopic pins 3 are all installed in three through holes on the ratchet rotary table 5. A compression spring is built into the through hole, and the compression spring provides the pressure for the telescopic pins to continuously press against the ratchet teeth, so that the ratchet and the ratchet teeth mesh.

[0019] In a preferred embodiment of this utility model, the sprocket 11 rotates synchronously with the sleeve and ratchet assembly 4 and adjusts its angle. When the sleeve of the sleeve and ratchet assembly 4 is aligned with the nut, the sleeve is fitted into the nut, and the cantilever drive cylinder 8 drives the rotating cantilever 7. The tensioning cylinder 6 extends, pushes the ratchet rotary disk 5, and drives the ratchet and hexagonal sleeve to rotate. The tensioning cylinder 6 retracts, driving the ratchet rotary disk 5 and the ratchet 2 to rotate.

[0020] This utility model relates to the fields of industrial automation and prestressed concrete pipe pile production, specifically involving the release process of prestressed concrete pipe piles. Releasing prestressed concrete pipe piles refers to loosening the fasteners anchored to the pipe mold, typically hexagonal nuts, during the production process, thereby releasing the prestressing tendons and allowing the concrete to acquire prestress. This process is commonly used for pre-tensioned prestressed concrete precast components. The specific steps include first tensioning the prestressed steel cage, and then, after the concrete reaches a certain strength, loosening these prestressing tendons to improve the concrete's load-bearing capacity and crack resistance, ensuring that the concrete product will not crack or deform due to external forces during use. The release operation involves first fitting a hydraulic wrench with a ratchet device or a hexagonal socket into the nut at the end of the pipe mold head, and then using hydraulic equipment to loosen the nut through the reciprocating action of the ratchet teeth, thus eliminating the prestress.

[0021] In a specific embodiment of this utility model, it can be divided into multiple parts, which can realize the alignment of the hexagonal sleeve and the nut, the extension and retraction of the oil cylinder to drive the ratchet and ratchet teeth to rotate, the sleeve and the ratchet to rotate synchronously, and finally loosen the nut.

[0022] This device includes a base and slewing support 1, three ratchet teeth 2, three telescopic pins 3, a sleeve and ratchet assembly 4, a ratchet slewing disc 5, a tensioning telescopic cylinder 6, a slewing cantilever 7, a cantilever drive cylinder 8, a ratchet slewing motor 9, a chain 10, a sprocket 11, and a torque-reversing stop 12.

[0023] The sequence is as follows: the device applies external force to the base and slewing support 1, causing the device to rest against the nut waiting to be released. The sleeve of the sleeve and ratchet assembly 4 adheres to the nut and has a certain compressive force. Then, the ratchet slewing motor 9 drives the sprocket 11 to rotate through the chain 10. The sleeve and ratchet assembly 4 rotate synchronously to adjust the angle. When the hexagonal sleeve of the sleeve and ratchet assembly 4 is aligned with the nut, the sleeve of the sleeve and ratchet assembly 4 can be inserted into the nut due to the compressive force. Subsequently, the cantilever drive cylinder 8 drives the slewing cantilever 7, so that the anti-torque stop block 12 engages with the anti-torque shim on the concrete pipe mold to provide a reaction force. Then, the release telescopic cylinder 6 extends, pushing the ratchet slewing disc 5 to drive the ratchet and hexagonal sleeve to rotate, loosening the nut. Finally, the release telescopic cylinder 6 retracts, driving the ratchet slewing disc 5 and the three ratchet teeth 2 to rotate. The telescopic pin 3 ensures the engagement of the ratchet teeth and ratchet through the elastic force. Under normal circumstances, repeating this process three times will cause the device to rotate the nut 180°, extend and retract the tension cylinder once, and rotate the sleeve and ratchet 60°, thereby releasing the prestress of the steel bars inside the pipe pile. After the nut is loosened, the tightening torque of the pipe mold decreases sharply. At this time, the ratchet rotary motor 9 and the chain 10 and sprocket 11 can replace the tension cylinder 6 to quickly loosen the nut again.

[0024] This high-torque ratchet tensioning device integrates a hexagonal sleeve and a ratchet on the same shaft. Three ratchet teeth are evenly arranged on the outer ring, and a large-diameter hydraulic cylinder drives it. A single extension or retraction of the cylinder drives the ratchet and sleeve, loosening the nut by 60° in just 8 seconds. Under normal circumstances, three extensions or retractions of the tensioning cylinder are sufficient to loosen the nut of one pipe mold, meaning the total time for tensioning one pipe pile is less than half a minute. This ratchet mechanism offers high torque and speed, making it suitable for most pipe mold tensioning applications. When used in automated equipment, this mechanism reduces manual labor.

[0025] For the specific implementation scheme of this embodiment, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0026] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0027] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means at least two.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] This invention employs a high-torque ratchet tensioning device. By integrating the hexagonal sleeve and ratchet onto the same shaft, the structure is simplified. Simultaneously, the outer ring engages with the ratchet through three ratchet teeth, increasing the torque the device can withstand. Driven by a large-diameter hydraulic cylinder, the device operates quickly, improving tensioning efficiency. It can rapidly and effectively loosen the tension nuts anchored to the pipe mold in prestressed concrete pile production, significantly reducing the time required for the tensioning process. Furthermore, this device can be integrated into automated equipment, enabling automatic alignment, automatic nut placement, and automatic tensioning, saving labor costs.

[0030] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A ratchet unwinding device with high torque, characterized in that, The device includes a base and a slewing support, three ratchet teeth, a sleeve and ratchet assembly, a ratchet rotary disc, a tensioning and telescopic cylinder, a slewing cantilever, and a cantilever drive cylinder. The base and slewing support rest on a nut. The ratchet teeth are mounted on the ratchet rotary disc. The sleeve and ratchet assembly mesh with the ratchet teeth. The front end of the tensioning and telescopic cylinder is connected to the ratchet rotary disc. The rear end of the slewing cantilever is connected to the rear end of the tensioning and telescopic cylinder via a rotating shaft. The front end of the slewing cantilever has two welded rings, which are fitted onto the front and rear sides of the ratchet on the sleeve and ratchet assembly via bearings. The upper end of the cantilever drive cylinder is connected to the slewing cantilever, and the bottom end of the cantilever drive cylinder is fixed to the ground.

2. The high-torque ratchet unwinding device according to claim 1, characterized in that, The sleeve and ratchet assembly includes a hexagonal sleeve and a ratchet, which are integrated on a single shaft. The outer ring of the sleeve and ratchet assembly has three ratchet teeth evenly arranged, and the ratchet meshes with the ratchet teeth.

3. The high-torque ratchet unwinding device according to claim 1, characterized in that, The device also includes a ratchet rotary motor, a chain, and a sprocket. The chain is fitted over the sprocket, and the sprocket is fixed to the end of the sleeve and ratchet assembly by a key pin and rotates synchronously with the ratchet. The ratchet rotary motor is connected to the chain, and the ratchet rotary motor drives the sprocket to rotate through the chain.

4. The high-torque ratchet unwinding device according to claim 1, characterized in that, The device also includes three telescopic pins, which correspond to three ratchet teeth and are evenly distributed between the ratchet teeth, the sleeve, and the ratchet assembly. The three telescopic pins are installed in three through holes on the ratchet rotary table. A compression spring is built into the through hole. The compression spring provides the telescopic pin with continuous pressure to press against the ratchet teeth, so that the ratchet and ratchet teeth mesh.

5. The high-torque ratchet unwinding device according to claim 3, characterized in that, The sprocket, sleeve, and ratchet assembly rotate synchronously and adjust their angles. When the sleeve of the sleeve and ratchet assembly is aligned with the nut, the sleeve is fitted into the nut. The cantilever drive cylinder drives the rotating cantilever. The tensioning cylinder extends, pushes the ratchet rotary disc, and drives the ratchet and hexagonal sleeve to rotate. The tensioning cylinder retracts, driving the ratchet rotary disc and ratchet to rotate.

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