Locking device of an extruder for power cable production

Abstract

The utility model discloses a locking device of extruder for power line production relates to power line production technical field, including fixed sleeve, the fixed sleeve outer wall is seted up with the installation groove, the installation groove is provided with a plurality of groups and inside all installation is equipped with the pivot, a plurality of the pivot outer wall all rotationally connected and is equipped with the clamping block, the fixed sleeve outer wall is slid and is equipped with the limit cover, the limit cover is in a plurality of quicken outer wall and is supported, the limit cover bottom is fixedly equipped with the cooperation cover, the cooperation cover outer wall is fixedly equipped with the sliding block, the sliding block is provided with a plurality of groups, and the fixed sleeve outer wall rotationally is equipped with the gear ring, the gear ring top is fixedly equipped with the rotation cover, the rotation cover outer wall is seted up with the transmission groove, the fixed sleeve outer wall is fixedly equipped with the motor, and the motor output is fixedly equipped with the gear, the gear is engaged with the gear ring, and the whole locking process is completed automatically by the motor without manual operation using wrench etc.

Description

Technical Field

[0001] This utility model relates to the field of power cord production technology, and more specifically, it relates to a locking device for an extrusion machine used in power cord production. Background Technology

[0002] In the power cord production process, extrusion equipment is the key equipment for realizing the continuous extrusion molding of plastic insulation layer and sheath layer. Its working principle is to heat and melt plastic raw materials and then extrude them through a die of a specific shape to cover the conductor surface.

[0003] In existing technologies, the locking and fixing of molds generally relies on manual operation. Operators need to use tools such as wrenches to tighten multiple bolts one by one. Since the mold installation part of the extrusion equipment is usually located at the front of the equipment and is surrounded by auxiliary systems such as heating devices and cooling pipes, the operating space is relatively narrow and limited. Workers continuously use wrenches to rotate and tighten bolts in a confined space, which is not only labor-intensive but also inefficient. The complete tightening process of a set of molds often takes more than ten minutes or even longer. When the production line needs to change molds urgently, this inefficient locking method will significantly prolong the equipment downtime and affect the execution of the production plan. Utility Model Content

[0004] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a locking device for an extrusion machine for power cord production, so as to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a locking device for an extrusion machine used in power cord production, comprising a fixed sleeve, an installation groove on the outer wall of the fixed sleeve, multiple sets of installation grooves, each with a rotating shaft installed on its inner side, clamping blocks rotatably connected to the outer walls of the multiple sets of rotating shafts, a limiting sleeve slidably provided on the outer wall of the fixed sleeve, the limiting sleeve abutting against the outer walls of the multiple sets of clamping blocks, a mating sleeve fixedly provided on the bottom surface of the limiting sleeve, a slider fixedly provided on the outer wall of the mating sleeve, multiple sets of sliders, a toothed ring rotatably provided on the outer wall of the fixed sleeve, a rotating sleeve fixedly provided on the top surface of the toothed ring, a transmission groove on the outer wall of the rotating sleeve, multiple sets of transmission grooves slidably connected to the multiple sets of sliders respectively, a motor fixedly provided on the outer wall of the fixed sleeve, a gear fixedly provided at the output end of the motor, the gear meshing with the toothed ring.

[0006] The present invention is further provided that the inner side of each of the multiple sets of clamping blocks is connected with a rubber pad, and multiple sets of rubber pads are provided. The rubber pads can improve the gripping force, prevent slippage, and protect the surface of the clamped item from damage.

[0007] The present invention is further provided that each of the multiple sets of clamping blocks is connected to a torsion spring, which provides a return force so that the clamping blocks can automatically rebound, thereby enhancing clamping stability and improving ease of operation.

[0008] The present invention is further configured such that each of the multiple sets of clamping blocks has a movable groove on its outer wall, and each of the multiple sets of movable grooves has a pulley rotatably installed in it. The pulleys are provided in multiple sets, and the pulley structure reduces frictional resistance, making the movement of the clamping blocks smoother and extending the service life of the device.

[0009] The present invention is further configured such that the top surfaces of the multiple sets of clamping blocks are all arc-shaped and are slidably connected to the multiple sets of mounting grooves respectively. The arc design increases the contact area, improves sliding stability, reduces jamming, and makes the movement smoother.

[0010] The present invention is further configured such that a guide block is fixedly provided on the inner side of the limiting sleeve, and a guide groove is provided on the outer wall of the fixed sleeve. Multiple sets of guide blocks and guide grooves are provided and slidably connected. The guide structure ensures that the limiting sleeve moves along a predetermined trajectory, prevents deviation and jamming, and improves the operation accuracy and reliability.

[0011] The present invention is further configured such that all of the multiple sets of transmission grooves are arc-shaped and all of the multiple sets of sliders are circular. The arc and circular designs reduce contact stress, reduce wear, make transmission smoother, and extend the service life of the parts.

[0012] The present invention is further configured such that the inner sides of the multiple sets of clamping blocks are all arc-shaped, the inner arc shape adapts to the outline of a circular object, increases the contact area, improves clamping stability and uniformity, and prevents deformation of the clamped object.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model provides a locking device for an extrusion machine used in power cord production, which has the following advantages: 1. This device achieves automated locking operation through the meshing transmission of a motor-driven gear and a gear ring. The gear ring drives the rotating sleeve to rotate and drives the slider and the limiting sleeve to move axially along the fixed sleeve through the transmission groove. The limiting sleeve pushes multiple sets of clamping blocks to rotate synchronously, so that the rubber pad forms a circumferential clamping force on the outer wall of the mold. The entire locking process is completed automatically by the motor without the need for manual operation using wrenches or other tools. This avoids the heavy labor of operators repeatedly rotating and tightening bolts in a narrow space, significantly improves mold replacement efficiency, reduces equipment downtime, and enables the production line to quickly respond to the switching needs of different specifications of power cord products, thereby improving production flexibility and overall efficiency.

[0014] 2. The motor drive system of this device, in conjunction with the gear and ring transmission mechanism, can output a stable and controllable driving torque. By adjusting the output parameters of the motor, the thrust applied by the limit sleeve to the clamping block can be precisely controlled, thereby achieving accurate adjustment of the clamping force. This ensures that the clamping force applied by multiple sets of clamping blocks to the outer wall of the mold is consistent and meets the process requirements. It solves the problem of uneven tightening force caused by differences in operator strength and fatigue in manual locking methods. It avoids the phenomenon that some connection points may loosen and leak during high-temperature and high-pressure extrusion due to insufficient tightening, or that the connection parts may be deformed and damaged due to over-tightening. This improves the reliability and sealing effect of the connection between the mold and the main body of the equipment, ensuring the stability of the power cord product quality.

[0015] 3. The torsion spring configured in this device serves as an elastic reset element. During unlocking, the motor reverses to drive the limit sleeve to release its contact with the pulley, after which the torsion spring automatically resets, causing the clamping block to rotate and open, quickly releasing the clamping of the mold's outer wall. This eliminates the need for manual disassembly of each connecting part. The entire unlocking process is as fast and convenient as the locking process, avoiding the problem of difficult disassembly or even damage to the threads caused by long-term wear and corrosion of threads in traditional bolt connections. It also reduces the wear on connecting parts caused by frequent locking and unlocking operations, improving the device's service life. At the same time, the automated unlocking operation reduces the technical requirements for operators, allowing ordinary workers to independently complete the rapid mold replacement operation, reducing reliance on professional technicians. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a locking device for an extrusion machine used in power cord production according to this utility model. Figure 2 This is a cross-sectional view of the fixing sleeve in this utility model; Figure 3 This is a cross-sectional view of the guide groove in this utility model; Figure 4 This is a schematic diagram of the clamping block in this utility model; Figure 5 This is a schematic diagram of the structure of the mating sleeve in this utility model.

[0017] In the diagram: 1. Fixed sleeve; 2. Mounting groove; 3. Rotating shaft; 4. Clamping block; 5. Limiting sleeve; 6. Mating sleeve; 7. Slider; 8. Gear ring; 9. Rotating sleeve; 10. Transmission groove; 11. Motor; 12. Gear; 13. Rubber pad; 14. Torsion spring; 15. Movable groove; 16. Pulley; 17. Guide block; 18. Guide groove. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0020] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0021] Please see Figures 1-5 A locking device for an extrusion machine used in power cord production includes a fixed sleeve 1. The outer wall of the fixed sleeve 1 has an installation groove 2. Multiple sets of installation grooves 2 are provided, and each set has a rotating shaft 3 installed on its inner side. The outer walls of the multiple sets of rotating shafts 3 are rotatably connected to clamping blocks 4. The outer wall of the fixed sleeve 1 is slidably provided with a limiting sleeve 5, which abuts against the outer walls of the multiple sets of clamping blocks. The bottom surface of the limiting sleeve 5 is fixedly provided with a mating sleeve 6. The outer wall of the mating sleeve 6 is fixedly provided with a slider 7, which is provided in multiple sets. The outer wall of the fixed sleeve 1 is rotatably provided with a toothed ring 8. The top surface of the toothed ring 8 is fixedly provided with a rotating sleeve 9. The outer wall of the rotating sleeve 9 has a transmission groove 10, which is provided in multiple sets and is slidably connected to the multiple sets of sliders 7 respectively. The outer wall of the fixed sleeve 1 is fixedly provided with a motor 11. The output end of the motor 11 is fixedly provided with a gear 12, which meshes with the toothed ring 8.

[0022] Multiple sets of clamping blocks 4 are connected to rubber pads 13 on their inner sides, and multiple sets of rubber pads 13 are provided.

[0023] Each set of clamping blocks 4 is connected to a torsion spring 14 between itself and the rotating shaft 3. Each set of clamping blocks 4 has a movable groove 15 on its outer wall, and each set of movable grooves 15 has a pulley 16 rotatably installed in it. There are multiple sets of pulleys 16.

[0024] The top surfaces of the multiple clamping blocks 4 are all arc-shaped and are slidably connected to the multiple mounting slots 2 respectively.

[0025] A guide block 17 is fixedly provided on the inner side of the limiting sleeve 5, and a guide groove 18 is provided on the outer wall of the fixing sleeve 1. Multiple sets of guide blocks 17 and guide grooves 18 are provided and are slidably connected.

[0026] All sets of transmission grooves 10 are set in arc shape, and all sets of sliders 7 are set in circle shape.

[0027] The inner sides of multiple clamping blocks 4 are all set to be arc-shaped.

[0028] In this embodiment, during use, the starter motor 11 drives the gear 12 to rotate, the gear 12 meshes with the transmission gear ring 8 to rotate, the gear ring 8 drives the rotating sleeve 9 to rotate, and drives the slider 7 to slide along the transmission groove 10 through multiple sets of transmission grooves 10. The multiple sets of sliders 7 drive the mating sleeve 6 and the limiting sleeve 5 to slide along the outer wall of the fixed sleeve 1, and slide along the guide groove 18 through multiple sets of guide blocks 17. The limiting sleeve 5 abuts against the outer wall of multiple sets of pulleys 16 and pushes the clamping block 4 to rotate along the rotating shaft 3. The multiple sets of clamping blocks 4 rotate along the rotating shaft 3 and drive the torsion spring 14 to deform, so that the multiple sets of rubber pads 13 are clamped and locked on the outer wall of the extruder head.

[0029] More specifically, when unlocking is required, the motor 11 reverses and drives the gear 12 to drive the gear ring 8 to rotate in the opposite direction, causing the mating sleeve 6 to drive the limiting sleeve 5 to release the contact with the multiple sets of pulleys 16. The multiple sets of torsion springs 14 reset and drive the clamping block 4 to rotate, releasing the clamping on the outer wall of the extruder head.

[0030] In summary, during use or operation of the overall equipment: When in use, the starting motor 11 drives the gear 12 to rotate, the gear 12 meshes with the transmission gear ring 8 to rotate, the gear ring 8 drives the rotating sleeve 9 to rotate, and drives the slider 7 to slide along the transmission groove 10 through multiple sets of transmission grooves 10. The multiple sets of sliders 7 drive the mating sleeve 6 and the limiting sleeve 5 to slide along the outer wall of the fixed sleeve 1, and slide along the guide groove 18 through multiple sets of guide blocks 17. The limiting sleeve 5 abuts against the outer wall of multiple sets of pulleys 16 and pushes the clamping block 4 to rotate along the rotating shaft 3. The multiple sets of clamping blocks 4 rotate along the rotating shaft 3 and drive the torsion spring 14 to deform, so that the multiple sets of rubber pads 13 are clamped and locked on the outer wall of the extruder head.

[0031] When unlocking is required, the motor 11 reverses and drives the gear 12 to rotate the gear ring 8 in the opposite direction, causing the mating sleeve 6 to drive the limit sleeve 5 to release the contact with the multiple sets of pulleys 16. The multiple sets of torsion springs 14 reset and drive the clamping block 4 to rotate, releasing the clamping on the outer wall of the extruder head.

[0032] Of all the solutions mentioned above, those involving connections between two components can be selected based on the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other well-known connection methods. These will not be elaborated on here. For all the fixed connections mentioned above, welding is the preferred option. In all the solutions mentioned above, the operation of electrical components, unless otherwise specified, is controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and wiring connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here. The specific models and specifications of the electrical components involved in this solution need to be selected and determined according to the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, and therefore will not be described in detail. Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be described in detail in this utility model. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A locking device for an extruder used in power cord production, comprising a fixing sleeve (1), characterized in that: The outer wall of the fixed sleeve (1) is provided with an installation groove (2). The installation groove (2) is provided with multiple sets and each of them is provided with a rotating shaft (3). The outer walls of the multiple sets of rotating shafts (3) are rotatably connected with clamping blocks (4). The outer wall of the fixed sleeve (1) is provided with a limiting sleeve (5). The limiting sleeve (5) abuts against the outer walls of the multiple sets of clamping blocks. The bottom surface of the limiting sleeve (5) is provided with a mating sleeve (6). The outer wall of the mating sleeve (6) is provided with a slider (7). The slider (7) is provided with multiple sets. The outer wall of the fixed sleeve (1) is provided with a toothed ring (8). The top surface of the toothed ring (8) is provided with a rotating sleeve (9). The outer wall of the rotating sleeve (9) is provided with a transmission groove (10). The transmission groove (10) is provided with multiple sets and is slidably connected to the multiple sets of sliders (7). The outer wall of the fixed sleeve (1) is provided with a motor (11). The output end of the motor (11) is provided with a gear (12). The gear (12) meshes with the toothed ring (8).

2. The locking device for an extruder used in power cord production according to claim 1, characterized in that: multiple sets of... Each clamp (4) is connected to a rubber pad (13) on its inner side, and multiple sets of the rubber pad (13) are provided.

3. The locking device for an extruder used in power cord production according to claim 2, characterized in that: multiple sets of... A torsion spring (14) is connected between the clamp (4) and the rotating shaft (3).

4. The locking device for an extruder for power cord production according to claim 3, characterized in that: multiple sets of... The outer wall of each clamping block (4) is provided with a movable groove (15), and multiple sets of pulleys (16) are provided in each of the movable grooves (15).

5. The locking device for an extruder for power cord production according to claim 4, characterized in that: multiple sets of... The top surface of each clamp (4) is set to be arc-shaped and is slidably connected to multiple sets of mounting slots (2).

6. The locking device for an extruder for power cord production according to claim 5, characterized in that: The inner side of the limiting sleeve (5) is fixedly provided with a guide block (17), and the outer wall of the fixed sleeve (1) is provided with a guide groove (18). The guide block (17) and the guide groove (18) are provided with multiple sets and are slidably connected.

7. A locking device for an extruder used in power cord production according to claim 6, characterized in that: multiple sets of... The transmission grooves (10) are all arc-shaped, and the multiple sets of sliders (7) are all circular.

8. The locking device for an extruder for power cord production according to claim 7, characterized in that: The inner sides of all the clamping blocks (4) are set to be arc-shaped.

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