Overrunning type overfeeding device of twisting machine

Abstract

The utility model provides an overrunning type overfeeding device of a twisting machine, which comprises a large overfeeding roller driven by a driving device to rotate, a small overfeeding roller arranged on one side of the large overfeeding roller, a clutch arranged between the driving device and the large overfeeding roller, and an overrunning clutch arranged between an overfeeding roller transmission shaft and the large overfeeding roller. And the overrunning clutch is used for enabling the large overfeeding roller to manually rotate towards the working direction in a power-on and non-starting state. And the surface of the large overfeeding roller is a mirror surface. By adopting the structure of the overrunning clutch, the large overfeeding roller can rotate towards the rotating direction in work under the action of the overrunning clutch when the overfeeding roller is electrified and the transmission shaft of the overfeeding roller cannot rotate, so that the threading and spinning-in operation of the twisting machine is facilitated for an operator, and the working efficiency is improved. And the problem of yarn sticking on the surface of the mirror surface type overfeeding roller during threading and repiecing is avoided.

Description

Technical Field

[0001] The utility model relates to the field of twisting machine parts, in particular to a transcending overfeeding device of a twisting machine. Background Art

[0002] In twisting machines, such as direct cabling machines, the yarn tension is reduced to a winding tension suitable for the finished package after passing through an overfeed device. In prior art, the overfeed device of a twisting machine typically consists of an overfeed gear, an electromagnetic clutch, a friction plate, a spring, an overfeed roller, and a drive shaft. The overfeed roller is integrally assembled with the drive shaft, and the friction plate is mounted on the shaft, enabling axial reciprocating movement and driving the shaft in rotation. The electromagnetic clutch is fixed to the overfeed housing. When the electromagnetic clutch is energized, it is attracted to the friction plate. At this time, the overfeed roller cannot rotate, and threading and spinning operations can be carried out: the yarn drawn out from the twister passes through the godet and is wound several times on the large and small overfeed rollers, and then passed through the compensation rod and guide wheel to be led upward to the winding area; during the twisting process of the twisting machine, the electromagnetic clutch is de-energized. At this time, the spring pushes the friction plate from the electromagnetic clutch end to the overfeed gear end, and fits with the friction disk bonded to the overfeed gear. The external transmission mechanism drives the overfeed gear to rotate, and the friction plate rotates together with the shaft and overfeed roller, and the twisted yarn wound on the overfeed roller achieves an overfeed effect.

[0003] To ensure smooth threading and proper yarn twisting, the overfeed roller surface of the overfeed device is typically roughened. This is because if the overfeed roller surface is treated very smoothly, such as with a mirror finish, yarn sticking is likely to occur when the yarn is wound around the roller surface during the threading process. This is particularly true for nylon and aromatic yarns. After being manually wound around the overfeed roller two or three times, the yarn cannot be pulled toward the winding area due to the sticking of the roller. In this case, the overfeed roller must be powered on and rotated. However, once the roller is turned on, the yarn sticks to the roller surface and becomes directly wrapped around the roller body as it rotates, preventing it from being guided along the normal threading and threading path, making the threading and threading operation impossible. Similar phenomena can also occur when threading and threading polyester yarns with conventional twist are performed while the overfeed roller is stopped. If the yarn is wound around the overfeed roller and the godet roller for the appropriate number of turns according to the normal twisting process requirements and the twisting production state is ready, once the power is turned on to rotate the overfeed roller, the yarn will stick to the surface of the overfeed roller due to the yarn sticking problem. As the overfeed roller rotates, it will continue to be wrapped around the surface of the overfeed roller, resulting in the inability to proceed normally. Therefore, in order to ensure that the yarn can be smoothly threaded and guided smoothly in the direction of rotation of the overfeed roller so that twisting production can proceed normally, the surface roughness of the overfeed roller is increased. However, after long-term use, this uneven overfeed roller surface becomes smooth and the roughness value decreases, causing the yarn winding tension to vary significantly and reducing the quality of the twisted yarn. In addition, the above-mentioned overfeed roller structure is relatively complex and difficult to install.

[0004] A yarn tension compensation rod is installed upstream of the overfeed device to compensate for length differences in the winding triangle of the twisted yarn during winding. Traditional yarn tension compensation rods are welded steel plates to a shaft, with a stopper plate added to the shaft to limit the position, resulting in a complex structure. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a twisting machine overrunning overfeeding device, which can ensure the normal overfeeding function of the yarn when the electromagnetic clutch loses power. When the power is on, when the overfeeding roller transmission shaft cannot rotate, the large overfeeding roller can still rotate according to the rotation direction of the working state under the action of the overrunning clutch, so as to facilitate the yarn threading and spinning-in operation of the twisting machine and avoid the problem of yarn sticking to the surface of the mirror-type overfeeding roller when threading and spinning-in.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a twisting machine overrunning overfeeding device, comprising a large overfeeding roller driven to rotate by a driving device, a small overfeeding roller is provided on one side of the large overfeeding roller, a clutch is provided between the driving device and the large overfeeding roller, and an overrunning clutch is provided between the overfeeding roller drive shaft and the large overfeeding roller, and the overrunning clutch is used to enable the large overfeeding roller to be manually rotated in the working direction when it is powered on and not started.

[0007] In a preferred embodiment, the surface of the large superfeed roller is a mirror surface.

[0008] In a preferred embodiment, a second wedge-shaped tooth is provided on the outer wall of the superfeed roller transmission shaft, and a first wedge-shaped tooth is provided on the inner wall of the large superfeed roller, and at least one of the second wedge-shaped tooth or the first wedge-shaped tooth is an elastic structure;

[0009] The second wedge-shaped tooth and the first wedge-shaped tooth are both provided with a gentle slope section and a steep slope section. When the gentle slope section of the second wedge-shaped tooth contacts the gentle slope section of the first wedge-shaped tooth, it is in the overtaking working state, which is used for threading and threading operations; when the steep slope section of the second wedge-shaped tooth contacts the steep slope section of the first wedge-shaped tooth, it is in the transmission working state.

[0010] In a preferred solution, the elastic structure includes a rubber or silicone elastic structure, or a wedge-shaped tooth structure supported by a spring.

[0011] In a preferred solution, the overrunning working state means that when the transmission shaft of the overfeeding roller stops, the large overfeeding roller can rotate in the working direction but cannot rotate in the reverse direction.

[0012] In a preferred embodiment, the overfeed roller transmission shaft is supported on the overfeed box through a bearing, the gear is connected to one end of the overfeed roller transmission shaft through a clutch, and the other end of the overfeed roller transmission shaft is connected to the large overfeed roller through an overrunning clutch.

[0013] In a preferred embodiment, the clutch structure is as follows: a friction plate is provided on the end face of the gear, the friction plate is connected to the overfeed roller drive shaft in a torque transmission manner and can slide along the overfeed roller drive shaft, and a spring is also provided on the overfeed roller drive shaft to press the friction plate against the friction plate;

[0014] An electromagnet is provided at the end of the friction plate away from the friction disc. When the electromagnet is energized, the friction plate and the friction disc are disengaged.

[0015] In a preferred solution, a compensation rod is provided downstream of the large overfeed roller, and the compensation rod is connected to the overfeed box through a pin shaft so that the compensation rod swings with the pin shaft as the center of the circle, and a first wire guide wheel is provided at the free end of the compensation rod.

[0016] In a preferred solution, an outwardly extending support arm is provided on the overfeed box, and a guide wheel is provided at the free end of the support arm.

[0017] In a preferred solution, an upper limit boss and a lower limit boss are provided on both sides of the compensation rod, and the upper limit boss and the lower limit boss are used to limit the swing angle of the compensation rod;

[0018] The upper limit boss limits the upper limit of the swing of the compensation rod to a horizontal state, and the lower limit boss limits the lower limit of the swing of the compensation rod to an angle of 40°~60° with the horizontal plane.

[0019] The utility model provides a twisting machine overrunning overfeeding device, which adopts the structure of an overrunning clutch to facilitate the realization that when power is turned on, under the premise that the overfeeding roller transmission shaft cannot rotate, the large overfeeding roller can rotate in the working rotation direction under the action of the overrunning clutch, thereby facilitating the operator to conveniently thread the yarn of the twisting machine and avoid the problem of yarn sticking to the surface of the mirror-type overfeeding roller when threading the yarn. The compensation rod is provided to compensate for the tension change of the yarn, and the tension change is controlled within a certain swing range to avoid excessive change in the wrap angle of the yarn on the small overfeeding roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 It is a three-dimensional diagram of the overfeeding device of the present invention.

[0022] Figure 2 It is the main view of the utility model.

[0023] Figure 3 for Figure 2 sectional view of .

[0024] Figure 4 It is a structural schematic diagram of the overrunning clutch in the utility model.

[0025] In the figure: overfeed box 1, large overfeed roller 2, small overfeed roller 3, pin 4, compensation rod 5, lower limit boss 6, first godet 7, upper limit boss 8, second godet 9, guide wheel 10, support arm 11, overfeed roller drive shaft 12, overrunning clutch 13, first wedge-shaped teeth 131, second wedge-shaped teeth 132, electromagnet 14, friction plate 15, friction disc 16, gear 17, spring 18, yarn 19. DETAILED DESCRIPTION

[0026] Example 1:

[0027] like Figures 1 and 2A twisting machine overrunning overfeed device includes a large overfeed roller 2 driven for rotation by a drive device, a small overfeed roller 3 disposed on one side of the large overfeed roller 2, a clutch disposed between the drive device and the large overfeed roller 2, and an overrunning clutch 13 disposed between the overfeed roller drive shaft 12 and the large overfeed roller 2. The overrunning clutch 13 is configured to enable the large overfeed roller 2 to be manually rotated in a working direction when powered and not started. In the power-on, unactivated state, the large overfeed roller 2 and the gear 17 are in a transmission connection, preventing the large overfeed roller 2 from rotating. The overrunning clutch 13 enables the large overfeed roller 2 to rotate unidirectionally, i.e., the overfeed roller drive shaft 12 can drive the large overfeed roller 2 to rotate. When the overfeed roller drive shaft 12 is unable to rotate, the large overfeed roller 2 can rotate independently. Specifically, during the yarn threading and spinning operation of the twisting machine, the sliding friction between the yarn and the surface of the large overfeed roller 2 is converted from the prior art to rolling friction according to the present invention, thereby improving the quality of the twisted yarn.

[0028] In a preferred embodiment, the surface of the large overfeed roller 2 is a mirror finish. A mirror finish refers to the smoothness of a metal surface. In this example, the surface Ra of the large overfeed roller 2 is less than 0.01 μm. This structure increases the friction between the surface of the large overfeed roller 2 and the yarn without affecting the yarn's strength.

[0029] The preferred solution is Figure 4 In the embodiment, the structure of the overrunning clutch 13 is as follows: a second wedge-shaped tooth 132 is provided on the outer wall of the overfeed roller transmission shaft 12, and a first wedge-shaped tooth 131 is provided on the inner wall of the large overfeed roller 2, and at least one of the second wedge-shaped tooth 132 or the first wedge-shaped tooth 131 is an elastic structure; in a preferred embodiment, the elastic structure includes a rubber or silicone elastic structure, or a wedge-shaped tooth structure supported by a spring.

[0030] like Figure 4 As shown in FIG, the first wedge-shaped teeth 131 are evenly distributed along the circumference of the inner wall of the large overfeeding roller 2, and the second wedge-shaped teeth 132 are evenly distributed along the circumference of the outer wall of the overfeeding roller transmission shaft 12.

[0031] The second wedge-shaped teeth 132 and the first wedge-shaped teeth 131 are both provided with a gentle slope section and a steep slope section. When the gentle slope section of the second wedge-shaped teeth 132 contacts the gentle slope section of the first wedge-shaped teeth 131, the teeth enter the overtaking working state, which is used for the threading operation. At this time, the deformation of one of the first wedge-shaped teeth 131 or the second wedge-shaped teeth 132 allows the other to pass, thereby enabling relative rotation between the second wedge-shaped teeth 132 and the first wedge-shaped teeth 131. When the steep slope section of the second wedge-shaped teeth 132 contacts the steep slope section of the first wedge-shaped teeth 131, the teeth enter the transmission working state, at which time the second wedge-shaped teeth 132 and the first wedge-shaped teeth 131 cannot rotate relative to each other. This structure forms a one-way rotation structure between the second wedge-shaped teeth 132 and the first wedge-shaped teeth 131.

[0032] In a preferred embodiment, the elastic structure comprises a rubber or silicone elastic structure. In this structure, the tooth surface of the second wedge-shaped tooth 132 or the first wedge-shaped tooth 131 is made of hard plastic, such as PC or polytetrafluoroethylene, while the turning position and internal filling position are made of rubber or silicone elastic structure. This allows the second wedge-shaped tooth 132 or the first wedge-shaped tooth 131 to deform, and this deformation manifests as radial swinging, thereby achieving unidirectional rotation between the second wedge-shaped tooth 132 and the first wedge-shaped tooth 131.

[0033] Alternatively, a spring-supported wedge-shaped tooth structure may be used. In this structure, one end of the wedge-shaped tooth is hingedly connected to a base, with a spring interposed between the wedge-shaped tooth and the base. The base may be the inner wall of the large overfeed roller 2 or the outer wall of the overfeed roller drive shaft 12. The spring may be a monofilament spring or a wound coil spring.

[0034] In a preferred solution, the overrunning working state means that when the overfeeding roller transmission shaft 12 stops, the large overfeeding roller 2 can rotate in the working direction but cannot rotate in the reverse direction.

[0035] The preferred solution is Figure 3 In the figure, the overfeed roller drive shaft 12 is supported on the overfeed box 1 via two bearings. A gear 17 is connected to one end of the overfeed roller drive shaft 12 via a clutch. The gear 17 is connected to a driving device, such as a motor (not shown). The other end of the overfeed roller drive shaft 12 is connected to the large overfeed roller 2 via an overrunning clutch 13.

[0036] The preferred solution is Figure 3 The clutch structure is as follows: a friction plate 16 is provided on the end face of a gear 17, and a torque-transmitting connection is established between the friction plate 15 and the overfeed roller drive shaft 12. Specifically, the friction plate 15 can transmit torque to the overfeed roller drive shaft 12 via a groove or polygonal structure and can slide axially along the overfeed roller drive shaft 12. A spring 18 is also provided on the overfeed roller drive shaft 12 to press the friction plate 15 against the friction plate 16. The spring 18 is sleeved onto the overfeed roller drive shaft 12 and is located on the side of the friction plate 15 away from the friction plate 16 to press the friction plate 15 against the friction plate 16.

[0037] An electromagnet 14 is provided at one end of the friction plate 15 away from the friction disc 16 . When the electromagnet 14 is energized, the friction plate 15 overcomes the elastic force of the spring 18 and slides axially to disengage from the friction disc 16 .

[0038] The preferred solution is Figure 1 、 2 In the figure, a compensation rod 5 is provided downstream of the large overfeed roller 2. The compensation rod 5 is connected to the overfeed box 1 through a pin 4 so that the compensation rod 5 swings with the pin 4 as the center. A first wire guide wheel 7 is provided at the free end of the compensation rod 5.

[0039] In a preferred solution, an outwardly extending support arm 11 is provided on the overfeed box 1 , and a guide wheel 10 is provided at the free end of the support arm 11 .

[0040] In the preferred embodiment, an upper limit boss 8 and a lower limit boss 6 are provided on both sides of the compensation rod 5. The upper limit boss 8 and the lower limit boss 6 are used to limit the swing angle of the compensation rod 5.

[0041] The upper limit boss 8 limits the upper swing limit of the compensation lever 5 to a horizontal position, while the lower limit boss 6 limits the lower swing limit of the compensation lever 5 to an angle of 40° to 60° with respect to the horizontal plane. The structure of the compensation lever 5 achieves high rotational accuracy, thus simplifying the structure and reducing disturbance to the yarn 19.

[0042] Example 2:

[0043] like Figure 2 In the process, the yarn is introduced from the second godet 9 of the overfeed box 1 to the large overfeed roller 2 of the overfeed device. After being wound 2 to 3 times on the surfaces of the large overfeed roller 2 and the small overfeed roller 3, it is drawn out from the small overfeed roller 3, passes around the first godet 7 of the compensation rod 5, and then passes around the guide roller 10 of the support arm 11 before being drawn out. When the yarn threading operation is required, the yarn can be pulled directly from the surface of the large overfeed roller 2.

[0044] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The embodiments and features therein may be arbitrarily combined unless they conflict. The scope of protection of the present invention shall be the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A twisting machine over-feeding device, comprising a large over-feeding roller (2) driven to rotate by a driving device, a small over-feeding roller (3) provided on one side of the large over-feeding roller (2), a clutch provided between the driving device and the large over-feeding roller (2), characterized in that: An overrunning clutch (13) is provided between the overfeeding roller transmission shaft (12) and the large overfeeding roller (2). The overrunning clutch (13) is used to enable the large overfeeding roller (2) to be manually rotated in a working direction when the power is on and the roller is not started.

2. The twisting machine overfeeding device according to claim 1, wherein: The surface of the large superfeed roller (2) is a mirror surface.

3. The twisting machine overfeeding device according to claim 1 or 2, wherein: The outer wall of the superfeeding roller transmission shaft (12) is provided with a second wedge-shaped tooth (132), and the inner wall of the large superfeeding roller (2) is provided with a first wedge-shaped tooth (131), and at least one of the second wedge-shaped tooth (132) or the first wedge-shaped tooth (131) is an elastic structure; The second wedge-shaped tooth (132) and the first wedge-shaped tooth (131) are both provided with a gentle slope section and a steep slope section. When the gentle slope section of the second wedge-shaped tooth (132) contacts the gentle slope section of the first wedge-shaped tooth (131), it is in an overrunning working state for threading operation; when the steep slope section of the second wedge-shaped tooth (132) contacts the steep slope section of the first wedge-shaped tooth (131), it is in a transmission working state.

4. The twisting machine overfeeding device according to claim 3, characterized in that: The elastic structure includes a rubber or silicone elastic structure, or a wedge-shaped tooth structure supported by a spring.

5. The twisting machine overfeeding device according to claim 3, characterized in that: The overrunning working state means that when the overfeeding roller transmission shaft (12) stops, the large overfeeding roller (2) can rotate in the working direction but cannot rotate in the reverse direction.

6. The twisting machine overfeeding device according to claim 1, characterized in that: The overfeed roller transmission shaft (12) is supported on the overfeed box (1) through a bearing, the gear (17) is connected to one end of the overfeed roller transmission shaft (12) through a clutch, and the other end of the overfeed roller transmission shaft (12) is connected to the large overfeed roller (2) through an overrunning clutch (13).

7. The twisting machine over-feeding device according to claim 6, characterized in that: The clutch structure is as follows: a friction plate (16) is provided on the end face of the gear (17); the friction plate (15) is connected to the superfeed roller transmission shaft (12) in a torque transmission manner and can slide along the superfeed roller transmission shaft (12); a spring (18) is also provided on the superfeed roller transmission shaft (12); the spring (18) presses the friction plate (15) against the friction plate (16); An electromagnet (14) is provided at one end of the friction plate (15) away from the friction disc (16), and the electromagnet (14) is energized to disengage the friction plate (15) from the friction disc (16).

8. The twisting machine overfeeding device according to claim 1, wherein: A compensation rod (5) is provided downstream of the large overfeed roller (2). The compensation rod (5) is connected to the overfeed box (1) through a pin shaft (4) so ​​that the compensation rod (5) swings with the pin shaft (4) as the center of a circle. A first guide wheel (7) is provided at the free end of the compensation rod (5).

9. The twisting machine over-feeding device according to claim 8, characterized in that: An outwardly extending support arm (11) is provided on the overfeed box (1), and a guide wheel (10) is provided at the free end of the support arm (11).

10. The twisting machine over-feeding device according to claim 8, characterized in that: An upper limit boss (8) and a lower limit boss (6) are provided on both sides of the compensation rod (5), and the upper limit boss (8) and the lower limit boss (6) are used to limit the swing angle of the compensation rod (5); The upper limit boss (8) limits the upper limit of the swing of the compensation rod (5) to a horizontal state, and the lower limit boss (6) limits the lower limit of the swing of the compensation rod (5) to an angle of 40° to 60° with the horizontal plane.

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