Extruder for controlling tension degree of cable
By setting up a rotating wheel and ratchet mechanism in the extruder, the rotation of the rotating bracket is driven by a motor to accurately control the tension of the core wire, the problems of low tension accuracy of the core wire and loose tensioning wheel in the prior art are solved, and efficient core wire tensioning control is achieved.
Patent Information
- Application Number
- CN202421778581.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-25
AI Technical Summary
The existing core wire tensioning method has lower accuracy by adjusting the position of the tensioning wheel, and the tensioning wheel is prone to loosening after the equipment is running for a long time, resulting in a reduced core wire tensioning effect.
By setting a rotating wheel and a ratchet mechanism in the extruder, the rotating bracket is driven by a motor to rotate, and the rotating wheel moves relative to the base plate position, driving the core wire to shift and tension. The ratchet mechanism accurately controls the rotation angle of the rotating bracket through the one-way intermittent rotation characteristic, thereby controlling the tension of the core wire.
Accurate control of the tension of the core wire is achieved, reducing the probability of the tension drop, and ensuring the stable tensioning effect of the core wire.
Smart Images
Figure CN222792706U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of extruder design, and in particular to an extruder for controlling the tension of a cable. Background Art
[0002] The extruder, also known as an extruder, is a device mainly used for extruding the core wires of power cords, power cables, data communication cables, optical fibers, etc. Its working process is roughly as follows: first, the core wire comes out of the pay-off frame and passes through the main machine head. At the same time, the main machine inhales the rubber material for heating, and then the main machine head coats the core wire with rubber, and finally it is pulled to the take-up machine for take-up and winding.
[0003] Among them, the core wire needs to be tensioned when it is introduced into the main machine head. The existing core wire tensioning method usually adjusts the tension of the core wire by adjusting the position of the tensioning wheel. This adjustment method has low accuracy, and the tensioning wheel will become loose after the equipment has been running for a long time, resulting in reduced tensioning effect on the core wire. Utility Model Content
[0004] The utility model aims to provide an extruder for controlling the tension of a cable, wherein the extruder drives a core wire to deflect by a rotating wheel so that the core wire is tensioned, and at the same time, a ratchet mechanism is used to accurately control the moving angle of the rotating wheel so as to control the tension of the core wire.
[0005] The technical solution adopted by the utility model to solve the above problems is:
[0006] An extruder for controlling cable tension comprises a shell, a main machine head and a tension adjustment mechanism, wherein the tension adjustment mechanism is fixed on the shell and is located on the left side of the main machine head, the tension adjustment mechanism comprises a bottom plate and a rotating bracket, the rotating bracket is rotatably arranged on the bottom plate, a rotating wheel is rotatably arranged on the rotating bracket and the rotating axis of the rotating wheel does not coincide with the rotating axis of the rotating bracket, a ratchet mechanism is coaxially fixed on the rotating bracket and the rotating bracket and the ratchet mechanism are driven to rotate by a motor.
[0007] In the above technical solution, preferably, two rotating wheels are provided and the two rotating wheels are symmetrically arranged at the upper and lower ends of the rotating bracket relative to the rotating axis of the rotating bracket.
[0008] In the above technical solution, preferably, the ratchet mechanism includes a ratchet and a pawl, the ratchet is coaxially fixed to the rear end of the rotating bracket, the pawl is rotatably arranged on the bottom plate and the pawl engages with the ratchet, and a spring is arranged on the pawl to drive the pawl to engage with the ratchet.
[0009] In the above technical solution, preferably, the motor is fixed on the rear side of the base plate, and the motor is a stepper motor.
[0010] In the above technical solution, preferably, two first guide wheels are symmetrically arranged on the upper and lower sides of the rotating bracket relative to the rotating bracket, and a tension sensor is arranged on the rear side of any one of the first guide wheels.
[0011] In the above technical solution, preferably, a connecting rod is provided on the upper side of the base plate, the lower end of the connecting rod can be rotated and locked on the base plate, and a second guide wheel is rotatably provided on the upper end of the connecting rod.
[0012] Compared with the prior art, the utility model has the following advantages and effects:
[0013] The utility model winds the core wire on the rotating wheel and drives the rotating bracket to rotate through the motor. Since the rotating axis of the rotating wheel and the rotating bracket do not coincide, the position of the rotating wheel relative to the bottom plate moves, thereby driving the core wire on the rotating wheel to deviate and tighten the core wire. According to the characteristics of the unidirectional intermittent rotation of the ratchet mechanism, the angle of a single rotation of the rotating bracket is determined by the parameters of the ratchet mechanism as a fixed value, so the angle of the rotating bracket driven by the motor can be controlled more accurately, thereby controlling the tension of the core wire. At the same time, the probability of the ratchet mechanism reversing and loosening, resulting in a decrease in the tension of the core wire, is low, ensuring the tensioning effect of the utility model on the core wire. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a front overall structural schematic diagram of an extruder for controlling cable tension according to an embodiment of the utility model.
[0015] Figure 2 yes Figure 1 Enlarged view of the tension adjustment mechanism.
[0016] Figure 3 yes Figure 2 Schematic diagram of the back structure.
[0017] Figure 4 yes Figure 3 Schematic diagram of the ratchet mechanism after the motor is removed.
[0018] Among them, there are a shell 1, a main machine head 2, a tension adjustment mechanism 3, a base plate 31, a rotating bracket 32, a rotating wheel 33, a ratchet mechanism 4, a ratchet 41, a pawl 42, a spring 43, a motor 5, a first guide wheel 6, a tension sensor 61, a connecting rod 7, a second guide wheel 71, and a core wire 8. DETAILED DESCRIPTION
[0019] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.
[0020] See also Figure 1-Figure 4The present embodiment is an extruder for controlling the tension of a cable, comprising a housing 1, a main machine head 2 and a tension adjustment mechanism 3, wherein the tension adjustment mechanism 3 is fixed on the housing 1 and is located on the left side of the main machine head 2, and the tension adjustment mechanism 3 comprises a bottom plate 31 and a rotating bracket 32, wherein the rotating bracket 32 is rotatably arranged on the bottom plate 31, a rotating wheel 33 is rotatably arranged on the rotating bracket 32, and the rotating axis of the rotating wheel 33 does not coincide with the rotating axis of the rotating bracket 32, a ratchet mechanism 4 is coaxially fixed on the rotating bracket 32, and the rotating bracket 32 and the ratchet mechanism 4 are driven to rotate by a motor 5.
[0021] The utility model winds the core wire 8 around the rotating wheel 33 and drives the rotating bracket 32 to rotate through the motor 5. Since the rotating axis of the rotating wheel 33 and the rotating bracket 32 do not coincide, the position of the rotating wheel 33 relative to the bottom plate 31 moves, thereby driving the core wire 8 on the rotating wheel 33 to deviate so that the core wire 8 is tensioned. According to the characteristic of the unidirectional intermittent rotation of the ratchet mechanism 4, the angle of a single rotation of the rotating bracket 32 is determined by the parameters of the ratchet mechanism 4 as a fixed value, so that the angle of the rotating bracket 32 driven by the motor 5 can be controlled more accurately, thereby controlling the tension of the core wire 8. At the same time, the probability of the ratchet mechanism 4 reversing and loosening, resulting in a decrease in the tension of the core wire 8, is low, ensuring the tensioning effect of the utility model on the core wire 8.
[0022] See also Figure 2 There are two rotating wheels 33 , and the two rotating wheels 33 are symmetrically arranged at the upper and lower ends of the rotating bracket 32 relative to the rotating axis of the rotating bracket 32 .
[0023] When the utility model is used, the core wire 8 is staggered in sequence in an oblique Z-shape and wound on the two rotating wheels 33. When the motor 5 drives the rotating bracket 32 to rotate, the two rotating wheels 33 rotate in opposite directions, so that the two positions on the core wire 8 can be offset in opposite directions. Therefore, the adjustment amount of the tension of the core wire 8 during a single rotation of the rotating bracket 32 can be increased, and the tension of the core wire 8 can be controlled in a larger range. At the same time, winding the core wire 8 on the two rotating wheels 33 at the same time can reduce the risk of the core wire 8 falling off the rotating wheels 33, thereby reducing the failure rate when the utility model is used.
[0024] See also Figure 4 The ratchet mechanism 4 includes a ratchet 41 and a pawl 42. The ratchet 41 is coaxially fixed to the rear end of the rotating bracket 32. The pawl 42 is rotatably arranged on the bottom plate 31 and engages with the ratchet 41. The pawl 42 is provided with a spring 43 for driving the pawl 42 to engage with the ratchet 41.
[0025] The ratchet mechanism 4 in the present invention adopts a conventional ratchet mechanism 4, and the angle of a single rotation of the rotating bracket 32 is the angle of rotation of the ratchet 41 when the adjacent tooth grooves on the ratchet 41 engage with the pawl 42 in turn. The pawl 42 is disengaged from the ratchet 41, and the ratchet 41 can be rotated to reset the rotating bracket 32. The spring 43 is further used to increase the stability of the engagement between the pawl 42 and the ratchet 41, thereby reducing the risk of the rotating bracket 32 turning over under the action of the core wire 8.
[0026] See also Figure 3 The motor 5 is fixed on the rear side of the bottom plate 31, and the motor 5 is a stepping motor.
[0027] The stepper motor can accurately control the rotation angle of the rotating bracket 32 each time it is driven, and at the same time make the rotation angle of the motor 5 each time match the rotation angle of the ratchet 41 when the adjacent tooth grooves on the ratchet 41 are engaged with the pawl 42 in turn, thereby improving the accuracy of the rotation angle of the rotating bracket 32 each time through the joint action of the motor 5 and the ratchet mechanism 4, which is convenient for precise control of the tension of the core wire 8.
[0028] See also Figure 2 , Figure 3 Two first guide wheels 6 are symmetrically arranged on the upper and lower sides of the rotating bracket 32 relative to the rotating bracket 32 , and a tension sensor 61 is arranged on the rear side of any one of the first guide wheels 6 .
[0029] The first guide wheel 6 can play a certain supporting role on the core wire 8, reducing the probability of the core wire 8 falling off the rotating wheel 33 when it is stretched too long. By arranging a tension sensor 61 on one of the first guide wheels 6, the tension of the core wire 8 wound around the first guide wheel 6 can be detected, so that the tension of the core wire 8 can be controlled by the angle of rotation of the rotating bracket 32 driven by the motor 5.
[0030] In this embodiment, the tension sensor 61 adopts a LZ-ZL70 tension sensor.
[0031] See also Figure 2 A connecting rod 7 is provided on the upper side of the bottom plate 31 , the lower end of the connecting rod 7 can be rotated and locked on the bottom plate 31 , and a second guide wheel 71 is rotatably provided on the upper end of the connecting rod 7 .
[0032] By rotating and adjusting the position of the connecting rod 7, the upper end of the second guide wheel 71 and the position of the main machine head 2 are located on the same horizontal plane, so that the core wire 8 can be in a horizontal state when it is wound around the second guide wheel 71 and pulled into the main machine head 2, which can reduce the friction between the core wire 8 and the outer shell of the main machine head 2 and facilitate the core wire 8 to enter the main machine head 2 for rubber encapsulation.
[0033] The above contents described in this specification are merely examples of the present utility model. Those skilled in the art of the present utility model may make various modifications or additions to the specific embodiments described, or replace them in similar ways, as long as they do not deviate from the contents of the present utility model specification or exceed the scope defined in the claims, they shall all fall within the protection scope of the present utility model.
Claims
1. An extruder for controlling cable tension, characterized in that: It includes a shell, a main machine head and a tension adjustment mechanism, wherein the tension adjustment mechanism is fixed on the shell and is located on the left side of the main machine head, and the tension adjustment mechanism includes a base plate and a rotating bracket, wherein the rotating bracket is rotatably arranged on the base plate, a rotating wheel is rotatably arranged on the rotating bracket and the rotating axis of the rotating wheel does not coincide with the rotating axis of the rotating bracket, a ratchet mechanism is coaxially fixed on the rotating bracket, and the rotating bracket and the ratchet mechanism are driven to rotate by a motor.
2. The extruder for controlling cable tension according to claim 1, characterized in that: There are two rotating wheels, and the two rotating wheels are symmetrically arranged at the upper and lower ends of the rotating bracket relative to the rotating axis of the rotating bracket.
3. The extruder for controlling cable tension according to claim 1, characterized in that: The ratchet mechanism comprises a ratchet and a pawl. The ratchet is coaxially fixed on the rear end of the rotating bracket. The pawl is rotatably arranged on the bottom plate and engages with the ratchet. The pawl is provided with a spring for driving the pawl to engage with the ratchet.
4. The extruder for controlling cable tension according to claim 1, characterized in that: The motor is fixed on the rear side of the bottom plate, and the motor is a stepper motor.
5. The extruder for controlling cable tension according to claim 1, characterized in that: Two first guide wheels are symmetrically arranged on the upper and lower sides of the rotating bracket relative to the rotating bracket, and a tension sensor is arranged on the rear side of any one of the first guide wheels.
6. The extruder for controlling cable tension according to claim 1, characterized in that: A connecting rod is arranged on the upper side of the bottom plate, the lower end of the connecting rod can be rotated and locked on the bottom plate, and a second guide wheel is rotatably arranged on the upper end of the connecting rod.