Internal tooth driving slewing bearing traction machine and three-layer co-extrusion dry-method crosslinking production line

Abstract

The utility model relates to the technical field of traction machines, in particular to an internal tooth driving slewing bearing traction machine which comprises a frame body, an internal tooth driving slewing bearing structure assembly, an outer belt traction assembly and an outer belt, and the outer belt traction assembly is arranged on the frame body and used for driving the outer belt to move; the internal tooth driving slewing bearing structure assembly comprises a center wheel located in the center of the frame body, a slewing bearing and a driving device. The output end of the driving device is respectively connected with a first pinion and a second pinion through a first speed reducer and a second speed reducer, the slewing bearing comprises an outer ring, a rolling body and an inner ring with inner teeth, the outer ring is fixedly connected onto the frame body, the first pinion and the second pinion are both meshed with the inner teeth of the inner ring, and the rolling body is fixedly connected onto the frame body. And the inner ring is connected with a central wheel. The traction machine solves the problems that an existing traction machine is insufficient in rigidity and unstable in transmission.

Description

TECHNICAL FIELD

[0001] The utility model relates to traction machine technical field especially relates to a inner tooth drive slewing bearing traction machine and three layer coextrusion dry method crosslinking production line. BACKGROUND

[0002] In the cable manufacturing field, especially in the production process of crosslinked cable, traction machine is one of the indispensable key equipment. The production of medium and high voltage wire and cable needs to be processed in a three-layer coextrusion crosslinked cable production line, and the traction machine is an essential equipment on the medium and high voltage crosslinked cable production line. The core enters the production line and travels along the production line under the action of the traction machine, thereby realizing crosslinking of a layer of material (such as plastic, rubber, etc.) on the core.

[0003] The existing traction machine used on the medium and high voltage crosslinked cable production line is mainly the traditional tape wrapping traction machine. The structure of the existing tape wrapping traction machine can refer to the patent with publication number CN208631800U, which includes a traction wheel, a motor, a reduction box, a fixed pressure roller, a swing arm, an adjustable pressure roller and a linear drive device. The rack includes a bottom plate and a flat box vertically arranged on the bottom plate. The linear drive device is arranged in the flat box and can drive the swing arm to swing. The traction wheel is arranged at the center of the front face of the flat box and is connected with the fixed pressure roller and the adjustable pressure roller through a belt. The motor drives the traction wheel to rotate through the reduction box. This traction machine relies on the belt, the fixed pressure roller and the adjustable pressure roller to realize the traction function. Although its design is compact, this structure may deform or deviate and have insufficient rigidity when handling large loads. Furthermore, using a belt drive may produce vibration and noise during high-speed operation. The elastic properties of the belt may result in insufficient direct power transmission, thereby affecting the stability of the transmission.

[0004] The present utility model designs an inner tooth drive slewing bearing traction machine and three layer coextrusion dry method crosslinking production line to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of inner tooth drive slewing bearing traction machine and three layer coextrusion dry method crosslinking production line, to solve the problem of insufficient rigidity of existing traction machine, transmission is not stable. Its technical scheme is as follows:

[0006] The utility model provides a kind of inner tooth drive slewing bearing traction machine: including frame, inner tooth drive slewing bearing structure assembly, outer belt traction assembly and outer belt, the outer belt traction assembly is arranged on frame, for driving outer belt movement;The inner tooth drive slewing bearing structure assembly includes the center wheel in the center of frame, slewing bearing and drive device;The output end of the drive device is connected first pinion and second pinion respectively by first speed reducer and second speed reducer, and the slewing bearing includes outer ring, rolling element and inner ring with inner teeth, the outer ring is fixed on frame, the first pinion and second pinion are all engaged with the inner teeth of inner ring, and the center wheel is connected on the inner ring.

[0007] On the basis of the above technical solution, the slewing bearing further comprises a spacer block and a plug; the rolling elements are arranged between the outer ring and the inner ring, the spacer block is located between the rolling elements, a taper pin is formed on the outer ring, and the plug is arranged on the outer ring.

[0008] Further, the center wheel is wrapped with a rubber belt.

[0009] Preferably, the outer belt traction assembly comprises a first outer belt wheel, a second outer belt wheel, a third outer belt wheel and a fourth outer belt wheel arranged around the center wheel, which are sequentially arranged on the frame and used for supporting and guiding the outer belt; the outer belt is closely attached to the surfaces of the outer belt wheels and is clamped together with the outer belt by the rubber belt wrapped on the center wheel to hold the cable.

[0010] The three-layer co-extrusion dry crosslinking production line comprises, in sequence, a pay-off machine, a wire accumulator, an upper traction machine, three extruders, a three-layer co-extrusion head, a closed crosslinking pipeline, a heating pipeline, a pre-cooling pipeline, a cooling pipeline, a lower traction machine and a take-up machine.

[0011] Advantages

[0012] Compared with the prior art, the utility model has the following advantages: on the one hand, the rigidity and load-carrying capacity are enhanced: the outer ring is fixed on the frame to provide a firm foundation support, which can withstand loads from all directions and enhance the overall rigidity and durability of the system. On the other hand, the transmission efficiency and stability are improved: the first pinion and the second pinion connected by the first speed reducer and the second speed reducer are engaged with the inner ring with inner teeth of the slewing bearing. This design ensures efficient and stable power transmission. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only one embodiment of the utility model, and for those skilled in the art, other implementation drawings can be obtained from the provided drawings without creating labor.

[0014] Figure 1 The structural schematic view of the inner tooth driving slewing bearing traction machine;

[0015] Figure 2 The schematic view of the outer belt;

[0016] Figure 3 The position schematic view of the central wheel and the slewing bearing;

[0017] Figure 4 The top view of the central wheel and the speed reducer;

[0018] Figure 5 The position schematic view of the slewing bearing and the pinion;

[0019] Figure 6 The structural schematic view of the slewing bearing;

[0020] Figure 7 The wiring schematic view of the inner tooth driving slewing bearing traction machine;

[0021] Figure 8 The structural schematic view of the three-layer co-extrusion dry method crosslinking production line. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings and examples:

[0023] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as the limitation of the utility model.

[0024] In the description of the utility model, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0026] As shown in Figures 1 to 5 A kind of inner tooth drive slewing bearing traction machine: including frame body 1, inner tooth drive slewing bearing structure assembly, outer belt traction assembly and outer belt 5, the outer belt traction assembly is set on frame body 1, for driving outer belt 5 movement;The inner tooth drive slewing bearing structure assembly includes the center wheel 21 located in the center of frame body 1, slewing bearing 22 and drive device;The output end of the drive device is connected with first pinion 51 and second pinion 52 respectively by first speed reducer 41 and second speed reducer 42, the slewing bearing 22 includes outer ring 221, rolling body 223 and inner ring 222 with inner teeth, the outer ring is fixedly connected on frame body 1, the first pinion 51 and second pinion 52 are all engaged with the inner teeth of inner ring, and the center wheel 21 on inner ring 222 is connected.The drive device drives the rotation of pinion, and pinion transmits power to inner ring 222, and finally drives the rotation of center wheel 21 on inner ring 222.

[0027] First pinion 51 and second pinion 52 connected by first speed reducer 41 and second speed reducer 42 are engaged with inner ring 222 with inner teeth.This design can more evenly distribute load, reduce wear between individual pinions and inner ring, and at the same time improve the transmission efficiency and stability of the entire system.

[0028] Two pinions can be used to drive the rotation of slewing bearing 22, and one pinion can also be used to drive the rotation of slewing bearing 22.When two pinions are used, one drive device can be used to simultaneously drive a driving wheel and two pinions to maintain engagement, achieving transmission, or two drive devices can be used to respectively connect first pinion 51 and second pinion 52, achieving transmission.

[0029] The outer ring 221 is fixedly connected on the frame body 1, which provides a solid foundation support for the entire system and can withstand large radial and axial loads.

[0030] As shown in Figure 6 The slewing bearing 22 further includes isolation block 224 and plug 226;Rolling body 223 is arranged between outer ring 221 and inner ring 222, isolation block 224 is located between rolling body 223, taper pin 225 is formed on outer ring 221, and plug 226 is arranged on outer ring 221.

[0031] The isolation blocks 224 are located between the rolling elements 223, preventing direct contact between them. This not only reduces friction and wear between the rolling elements, but also ensures that the rolling elements can evenly distribute the load, improving the overall running stability and extending the service life of the equipment.

[0032] The rolling elements 223 are located in the raceways between the outer ring 221 and the inner ring 222. These rolling elements 223 can provide low-friction rotation while bearing heavy loads, making the slewing bearing have greater load-carrying capacity while having excellent impact resistance.

[0033] Taper pins 225 are provided on the outer ring 221 for precise positioning of the isolation blocks or specific rolling elements, which also helps to improve assembly accuracy and disassembly convenience. The plug 226 is provided on the outer ring 221 to close the assembly hole and prevent dust, water and other contaminants from entering the interior. In addition, the plug 226 can also help to retain lubricating oil or grease inside the bearing, reducing maintenance frequency and improving sealing effect.

[0034] The meshing between the pinion and the inner ring of the slewing bearing is a closed gear transmission form. In this design, the gear is enclosed in a housing to prevent external dust, moisture and other contaminants from entering, thereby ensuring good lubrication conditions and extending the service life. It greatly extends the service life compared to traditional open gear transmission.

[0035] The center wheel 21 is coated with a rubber belt; the outer belt traction assembly includes a first outer belt wheel 31, a second outer belt wheel 32, a third outer belt wheel 33, and a fourth outer belt wheel 34 arranged around the center wheel 21. These outer belt wheels are arranged in sequence and set on the frame body 1 to support and guide the outer belt 5; the outer belt 5 closely adheres to the surface of each outer belt wheel and, together with the rubber belt coated on the center wheel 21, clamps the cable. When the center wheel 21 rotates, the rubber belt provides additional friction, enabling the outer belt 5 to effectively drive the cable forward, achieving stable traction of the cable.

[0036] The first outer belt wheel 31, the second outer belt wheel 32, the third outer belt wheel 33, and the fourth outer belt wheel 34 not only support and guide the outer belt 5, but also ensure the tension and stability of the outer belt during the entire working process.

[0037] The rubber belt coated on the center wheel 21 increases the friction coefficient between the outer belt 5, enabling them to more firmly clamp the cable. The choice of rubber material helps to adapt to different cable surface characteristics, providing more stable gripping force and preventing cable slippage or skidding.

[0038] Through the joint action of the rubber belt on the center wheel 21 and the outer belt 5, sufficient contact and clamping between the outer belt and the cable are achieved. This design not only improves the traction force, but also ensures that the cable will not deviate or be damaged during transmission, ensuring the continuity and stability of the production line.

[0039] When the system is running, the center wheel 21 rotates through its internal driving device, driving the rubber belt and movement. Due to the friction between the rubber belt and the outer belt 5, as well as their clamping effect on the cable, the cable can be smoothly and efficiently pulled forward during this process.

[0040] Preferably, an outer belt driving device can be provided on the outer belt traction assembly, such as a motor on the outer belt wheel. When traction, both the center wheel and the outer belt have power, which can better pull the cable.

[0041] A tensioning mechanism is also provided, which includes a tensioning cylinder 71 and a sliding block 72. The cylinder body of the tensioning cylinder 71 is provided on the frame body 1, and its piston rod free end is connected to the second outer belt wheel 32. The sliding block 72 is fixed to the upper frame body 1 and provided with a sliding rail, and the second outer belt wheel 32 is slidingly connected to the sliding rail.

[0042] The cylinder body of the tensioning cylinder 71 is fixed to the frame body 1, and the piston rod is connected to the second outer belt wheel 32. When the tension needs to be adjusted, it can be achieved by controlling the extension and retraction of the cylinder. The sliding block 72 is fixed to the upper frame body 1 and provided with a sliding rail, allowing the second outer belt wheel 32 to slide freely along the sliding rail, ensuring smoothness and accuracy during adjustment. The position of the second outer belt wheel 32 can be adjusted in real time by the tensioning cylinder 71, thereby changing the tension of the outer belt 5. This is crucial for maintaining proper contact between the outer belt and each outer belt wheel, ensuring that the outer belt does not slip due to being too loose or cause additional wear due to being too tight.

[0043] A wire control device 11 is provided on the frame body 1. The wire control device 11 includes a wire control bracket and a wire guide wheel. The wire guide wheel is rotatably connected to the wire control bracket, and is used to guide the cable into the correct path, ensuring that the cable advances in the predetermined direction. They are usually made of wear-resistant materials to reduce friction with the cable.

[0044] A traction guide wheel 12 is provided on the frame body 1. The traction guide wheel 12 includes a traction bracket and a traction guide wheel. The traction bracket and the traction guide wheel are rotatably connected, and the traction guide wheel is used to guide the cable into the correct path, ensuring that the cable advances in the predetermined direction.

[0045] The driving device is an electric motor, a hydraulic motor or a pneumatic motor.

[0046] The frame body 1 is provided with a tape blocking roller. The tape blocking roller can effectively limit the movement of the outer tape 5, ensuring that it always runs along the predetermined path. This is crucial to avoid problems such as slipping, wear, and even breakage of the outer tape due to deviation from the track. By preventing the outer tape from deviating from the normal working path, the risk of mechanical failure due to positional deviation can be significantly reduced, ensuring the continuity and stability of the production line. Multiple tape blocking rollers can be provided.

[0047] As Figure 7As shown, the traction machine is a schematic diagram of the cable, the power source of the traction machine is a driving device (such as motor, hydraulic motor or pneumatic motor). The driving device transmits power to two pinions (first pinion 51 and second pinion 52) through the reducer (first reducer 41 and second reducer 42). The power output by the driving device is transmitted to the first pinion 51 and the second pinion 52 through the first reducer 41 and the second reducer 42 respectively after being reduced. The two pinions are meshed with the inner ring 222 of the slewing bearing 22. This design ensures that the power can be smoothly transmitted to the slewing bearing and can uniformly distribute the load to reduce wear. The slewing bearing 22 includes an outer ring 221, rolling elements 223, an inner ring 222 with internal teeth, and a spacer 224. The outer ring 221 is fixed on the frame 1, and the inner ring 222 is connected to the center wheel 21. When the first pinion 51 and the second pinion 52 rotate, they will drive the inner ring 222 and the center wheel 21 to rotate together. The center wheel 21 is covered with a rubber belt, which increases the friction coefficient between the outer belt 5 and helps to clamp the cable more firmly. The outer belt traction assembly is composed of first outer belt wheel 31, second outer belt wheel 32, third outer belt wheel 33 and fourth outer belt wheel 34, which are arranged on the frame 1 to support and guide the outer belt 5. The outer belt 5 closely adheres to the surface of each outer belt wheel, and the rubber belt on the center wheel 21 and the outer belt 5 together clamp the cable. In order to ensure that the outer belt 5 is always in proper tension, a tensioning mechanism (including a tensioning cylinder 71 and a sliding block 72) is provided, the piston rod of the tensioning cylinder 71 is connected to the second outer belt wheel 32, so that it can be adjusted in position along the sliding rail as needed. The cable is first arranged neatly by the cable controller 11 and then enters the traction system. The cable controller 11 helps the cable enter between the outer belt 5 and the center wheel 21 at the correct angle and path. As the center wheel 21 rotates, the rubber belt on it acts together with the outer belt 5 to exert sufficient friction on the external cable to pull it forward. Because the rubber belt provides additional friction, the outer belt 5 can effectively drive the cable forward to achieve stable traction of the cable. Through the cooperation of the above-mentioned components, the whole system realizes continuous and stable traction operation of the cable. The control system can adjust the speed of the driving device according to actual needs, so as to control the traction speed and precision of the cable. Finally, the cable is pulled to the next process by the traction guide wheel 12. It should be noted that the direction of motion of the driving device can be changed to control the direction of cable conveying.

[0048] As Figure 8 shown, the three-layer co-extrusion dry crosslinking production line includes a pay-off machine 61, a cable storage device 62, an upper traction machine 63 and a lower traction machine 66 as described above; three extruders, a three-layer co-extrusion head 64, a sealing device 65, a crosslinking pipeline, a heating pipeline 67, a pre-cooling pipeline 68, a cooling pipeline 69 and a take-up machine.

[0049] The unwinding machine 61 is responsible for releasing the raw cable material from the reel, preparing it for subsequent processing steps. The cable accumulator 62 is used to temporarily store a certain length of cable, so that in the event of a malfunction or adjustment of a part of the production line, cable supply can continue, reducing downtime. Each of the three extruders is used to extrude a different plastic material, such as an insulation layer, a shielding layer, etc., forming a multi-layer structure cable. Typically, these three layers are the inner layer, the intermediate layer, and the outer layer. The three-layer co-extrusion head 64 is the key component that enables simultaneous extrusion of three layers of material, uniformly wrapping the different materials from the three extruders around the cable surface to form the desired multi-layer structure. The traction machine, as the upper traction machine 63 and the lower traction machine 66, is responsible for pulling the cable through the entire production line, ensuring that the cable advances at a constant speed. The enclosure 65 is used to protect the extruded cable from the external environment, especially before cross-linking treatment, to prevent impurities in the air from contaminating the cable surface. The cross-linking pipeline 67: performs chemical or physical cross-linking treatment on the extruded cable to enhance the mechanical properties and heat resistance of the cable. The heating pipeline 67 provides the necessary high-temperature conditions for the cross-linking process. The pre-cooling pipeline 68 rapidly reduces the temperature of the cable after cross-linking to prevent overheating damage. The cooling pipeline 69 further cools the cable to room temperature, ensuring its physical properties are stable. The take-up machine is responsible for neatly winding the cable that has completed all processing steps on the reel, facilitating storage and transportation.

[0050] The unwinding machine 61, the cable accumulator 62, the three extruders, the three-layer co-extrusion head 64, the enclosure 65, the cross-linking pipeline, the heating pipeline 67, the pre-cooling pipeline 68, the cooling pipeline 69, and the take-up machine for the three-layer co-extrusion dry cross-linking production are all general standard components or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods, and will not be described here.

[0051] It should be noted that the motors, hydraulic motors, or pneumatic motors in the present embodiment are general standard components or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods.

[0052] The utility model has been described above by way of example, but the utility model is not limited to the above specific embodiments, and any modification or variation made based on the utility model falls within the scope of protection required by the utility model.

Claims

1. A traction machine with an internal gear driven slewing bearing, characterized in that: The device includes a frame (1), an internal gear drive slewing bearing structure assembly, an external belt traction assembly, and an external belt (5). The external belt traction assembly is mounted on the frame (1) and is used to drive the external belt (5) to move. The internal gear drive slewing bearing structure assembly includes a center wheel (21) located at the center of the frame (1), a slewing bearing (22), and a drive device. The center wheel (21) is connected to the slewing bearing (22), and the drive device is used to drive the center wheel (21) to rotate. The combined clamping action of the center wheel (21) and the external belt (5) on the cable achieves the traction of the cable.

2. The internal gear driven slewing bearing traction machine according to claim 1, characterized in that... The output end of the drive device is connected to the first pinion (51) and the second pinion (52) through the first reducer (41) and the second reducer (42) respectively. The slewing bearing (22) includes an outer ring (221), a rolling element (223) and an inner ring (222) with internal teeth. The outer ring (221) is fixed to the frame (1). The first pinion (51) and the second pinion (52) both mesh with the internal teeth of the inner ring (222). The center wheel (21) is connected to the inner ring (222).

3. The internal gear driven slewing bearing traction machine according to claim 2, characterized in that... The slewing bearing (22) further includes a spacer block (224) and a plug (226); a rolling element (223) is provided between the outer ring (221) and the inner ring (222), the spacer block (224) is located between the rolling elements (223), a tapered pin (225) is provided on the outer ring (221), and the plug (226) is provided on the outer ring (221).

4. The internal gear driven slewing bearing traction machine according to claim 1, characterized in that... The center wheel (21) is covered with a rubber belt.

5. A traction machine with an internal gear driven slewing bearing according to claim 4, characterized in that... The external belt traction assembly includes a first external belt wheel (31), a second external belt wheel (32), a third external belt wheel (33), and a fourth external belt wheel (34) arranged around the central wheel (21). These external belt wheels are arranged in sequence and set on the frame (1) to support and guide the external belt (5). The external belt (5) is tightly attached to the surface of each external belt wheel, and the cable is clamped together with the external belt (5) by the rubber belt wrapped on the central wheel (21).

6. A traction machine with an internal gear driven slewing bearing according to claim 5, characterized in that... A tensioning mechanism is also provided, which includes a tensioning cylinder (71) and a slider (72). The cylinder body of the tensioning cylinder (71) is set on the frame (1), and the free end of its piston rod is connected to the second outer pulley (32). The slider (72) is fixed to the upper frame (1) and is provided with a slide rail. The second outer pulley (32) is slidably connected to the slide rail.

7. A traction machine with an internal gear driven slewing bearing according to claim 1, characterized in that... A cable controller (11) is installed on the frame (1).

8. A traction machine with an internal gear driven slewing bearing according to claim 1, characterized in that... The frame (1) is equipped with a traction guide wheel (12).

9. A traction machine with an internal gear driven slewing bearing according to claim 1, characterized in that... The frame (1) is equipped with a belt roller.

10. A three-layer co-extrusion dry crosslinking production line, characterized in that: It includes a wire feeding machine (61), a wire storage device (62), a traction machine as described in any one of claims 1-9 as an upper traction machine (63) and a lower traction machine (66) arranged in sequence; three extruders, a three-layer co-extrusion die head (64), a seal (65), a cross-linking pipeline, a heating pipeline (67), a pre-cooling pipeline (68), a cooling pipeline (69) and a take-up machine.

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