Wheel type automatic silk thread twisting device
By designing a wheel-type automatic wire twister and utilizing a drive mechanism and a transmission mechanism to realize automatic wire twisting, the problem of low efficiency of traditional wire twisting is solved and the degree of automation and tightness of wire twisting are improved.
Patent Information
- Application Number
- CN202422574852.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-23
AI Technical Summary
Traditional wire twisting operations are inefficient, have a low degree of automation, and are difficult to ensure wire tightness and consistency.
A wheel-type automatic wire twister is designed, which includes a driving mechanism, a transmission mechanism and a rotation mechanism. The automatic twisting process is realized by the cooperation of the plug block and the transmission wheel.
It realizes an efficient and automated wire twisting process with simple operation and good wire twisting tightness and consistency.
Smart Images
Figure CN223338251U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wire twisters, in particular to a wheel-type automatic wire twister. Background Art
[0002] In many fields such as construction, building, and power line maintenance, it is often necessary to twist two bundles of steel wires to form a secure connection. However, traditional twisting operations are mostly done manually. When twisting the wires, the wires are very thin and difficult to clamp. In addition, the wires are long, so repeated rotation and twisting are required to form a complete bundle of wires. This is not only inefficient, but also difficult to ensure the tightness and consistency of the twisting. Currently, there are some semi-automatic or manually assisted wire twisting tools on the market. Most of these tools are composed of clamps. When using them, the operator needs to wrap the steel wire around the wire to be knotted, clamp the clamp, and then rotate the clamp. After multiple rotations, the knot is completed. Although this knotter has an effect on clamping the wires and improves work efficiency to a certain extent, it still needs to be repeatedly rotated and twisted. There are problems such as low degree of automation, complex operation, and low efficiency. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a wheel-type automatic wire twister, which can automatically twist wires and has a high degree of automation, simple operation and high efficiency.
[0004] In order to solve the above technical problems, the utility model provides a wheel-type automatic wire twister, which includes a housing, a fixed seat, a driving mechanism arranged in the housing, a transmission mechanism that is transmission-connected to the driving mechanism and located on the fixed seat, and a rotating mechanism connected to the transmission mechanism.
[0005] The transmission mechanism includes a first transmission wheel, and the rotating mechanism includes a rotating wheel and an insert block. The first transmission wheel can drive the rotating wheel to rotate. The insert block is fixed to the side of the rotating wheel. One end of the insert block can be inserted between two adjacent bundles of silk threads. The rotating wheel can drive the insert block to rotate around the central axis of the rotating wheel so that the two bundles of silk threads are twisted together into a bundle.
[0006] As an improvement to the above-mentioned solution, the driving mechanism includes a driving wheel, and the transmission mechanism also includes a rotating wheel. The rolling surface of the driving wheel abuts against the rolling surface of the rotating wheel. The driving wheel can drive the rotating wheel to rotate. The first transmission wheel is fixed on the central axis of the rotating wheel, and the rotating wheel can drive the first transmission wheel to rotate coaxially.
[0007] As an improvement to the above scheme, the transmission mechanism also includes a second transmission wheel, the rolling surface of the first transmission wheel abuts against the rolling surface of the second transmission wheel, the rolling surface of the second transmission wheel abuts against the rolling surface of the rotating wheel, and the first transmission wheel can drive the rotating wheel to rotate through the second transmission wheel.
[0008] As an improvement to the above scheme, the transmission mechanism also includes a third transmission wheel, the rolling surface of the first transmission wheel abuts against the rolling surface of the third transmission wheel, the second transmission wheel and the third transmission wheel are symmetrically arranged on both sides of the first transmission wheel, and the second transmission wheel and the third transmission wheel are both arranged on the side of the first transmission wheel close to the rotating wheel, the rolling surface of the third transmission wheel abuts against the rolling surface of the rotating wheel, and the first transmission wheel can simultaneously drive the rotating wheel to rotate through the second transmission wheel and the third transmission wheel.
[0009] As an improvement of the above-mentioned scheme, a through-hole is provided in the middle of the rotating wheel, and a threading notch is provided on one side of the rotating wheel. The threading notch is connected to the through-hole, and two adjacent bundles of silk threads can enter the through-hole from the threading notch. When the rotating wheel rotates, the threading notch can rotate around the central axis of the through-hole. A threading entrance is provided at the outer end of the fixed seat, and the threading entrance is in the shape of an "eight" with a wide outside and a narrow inside. When the threading notch rotates, it can be periodically connected with the threading entrance.
[0010] As an improvement to the above solution, the first end of the insert block is fixed to the side of the rotating wheel away from the threading notch, and the second end of the insert block extends toward the side of the threading notch. The second end of the insert block can be inserted between two adjacent bundles of silk thread. When the rotating wheel rotates, the second end of the insert block can rotate around the central axis of the perforation.
[0011] As an improvement of the above-mentioned scheme, the wheel-type automatic wire twister also includes a limiting mechanism, which includes a telescopic block, which is movably arranged on the side of the rotating wheel, and a limiting protrusion is provided on the side of the rotating wheel away from the insertion block. The limiting protrusion protrudes toward the side away from the insertion block, and the telescopic block can move in the direction close to or away from the rotating wheel. When the threading notch is toward the side away from the first transmission wheel and is connected to the threading entrance, the limiting protrusion can abut against the telescopic block.
[0012] As an improvement to the above-mentioned solution, a contact surface and a limit surface are respectively provided on both sides of one end of the telescopic block close to the rotating wheel. The contact surface is an inclined surface, which is inclined from the side close to the rotating wheel to the side away from the rotating wheel. The angle between the limit surface and the contact surface is an acute angle.
[0013] When the rotating wheel rotates in the forward direction, the limiting protrusion can abut against the contact surface and drive the telescopic block away from the rotating wheel, so that the limiting protrusion can cross over the telescopic block.
[0014] When the rotating wheel rotates in the reverse direction, the limiting protrusion can abut against the limiting surface, and the limiting surface can restrict the rotating wheel from continuing to rotate and connect the threading notch with the threading entrance.
[0015] As an improvement of the above solution, the limiting mechanism also includes a fixed block and an elastic member, the fixed block is fixed to the side of the rotating wheel, one end of the elastic member abuts against the fixed block, and the other end of the elastic member abuts against the telescopic block.
[0016] As an improvement to the above solution, the housing includes a handle portion, which is arranged on a side of the housing away from the rotating wheel, and a switch button is provided on the handle portion.
[0017] The implementation of this utility model has the following beneficial effects:
[0018] The present invention provides a wheeled automatic wire twister with a driving mechanism, a transmission mechanism and a rotating mechanism, wherein the transmission mechanism includes a first transmission wheel, the rotating mechanism includes a rotating wheel and an insert block, when it is necessary to twist two bundles of wire, one end of the insert block can be inserted between two adjacent bundles of wire, the first transmission wheel can drive the rotating wheel to rotate, the rotating wheel can drive the insert block to rotate, when the insert block rotates, it will first flip the wire on one side and wrap it around the wire on the other side, and then cause the two bundles of wire to flip and wrap around each other until the two bundles of wire are twisted to form a larger bundle, thereby achieving the effect of twisting each other, after the twisting is completed, it is only necessary to pull out the insert block, and then slightly rotate the part of the two bundles of wire where the insert block is located to complete the winding and twisting of the bundle. Automatic twisting can be achieved in the whole process, and twisting can be quickly performed by rotating the insert block, so the degree of automation is high, the operation is simple, and the efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the disassembled structure of the wheel-type automatic wire twister of the utility model;
[0020] Figure 2 This is a schematic diagram of the state in which the wheel-type automatic silk thread twister of the utility model twists the silk threads into a wire bundle;
[0021] Figure 3 It is a structural diagram of the transmission mechanism, rotating mechanism and limiting mechanism of the utility model;
[0022] Figure 4 yes Figure 3 A partial enlarged view of middle A. DETAILED DESCRIPTION
[0023] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that any directional terms such as "up," "down," "left," "right," "front," "back," "inside," and "outside" that appear or will appear in this document are based solely on the accompanying drawings and are not intended to limit the present invention.
[0024] See also Figure 1 and Figure 2 The present invention discloses a wheeled automatic thread twister, comprising a housing 1, a fixed base 6, a drive mechanism 2 disposed within the housing 1, a transmission mechanism 3 connected to the drive mechanism 2 and located on the fixed base 6, and a rotation mechanism 4 connected to the transmission mechanism 3. The fixed base 6 is fixedly connected to the housing 1 and has accommodating grooves corresponding to the drive mechanism 2 and the transmission mechanism 3, capable of accommodating and supporting the drive mechanism 2 and the transmission mechanism 3. A drive motor, preferably a rotary motor, is disposed within the housing 1 and capable of driving the drive mechanism 2 and the transmission mechanism 3.
[0025] The transmission mechanism 3 includes a first transmission wheel 31, and the rotating mechanism 4 includes a rotating wheel 41 and an insert block 42. The first transmission wheel 31 and the rotating wheel 41 can transmit information to each other, and the first transmission wheel 31 can drive the rotating wheel 41 to rotate. The insert block 42 is fixed to the side of the rotating wheel 41, so that when the rotating wheel 41 rotates, it drives the insert block 42 to rotate. One end of the insert block 42 can be inserted between two adjacent bundles of silk threads 10, and the rotating wheel 41 can drive the The plug block 42 rotates around the central axis of the rotating wheel 41. When the plug block 42 rotates, it will first drive the silk thread 10 on its left side to flip to the right, and the silk thread 10 on the right side will flip to the left. The two bundles of silk threads 10 intersect and entangle with each other. As the plug block 42 continues to rotate, the two bundles of silk threads 10 continue to flip and entangle with each other, and finally the two bundles of silk threads 10 can be twisted together into a wire harness 20. Under the action of the wheel-type automatic wire twister of the utility model, the two bundles of silk threads 10 can form a twisted wire harness 20.
[0026] The beneficial effects of the embodiments of the present utility model are as follows:
[0027] The wheeled automatic wire twister of the present utility model embodiment is provided with a driving mechanism 2, a transmission mechanism 3 and a rotating mechanism 4, wherein the transmission mechanism 3 includes a first transmission wheel 31, and the rotating mechanism 4 includes a rotating wheel 41 and an insert block 42. When it is necessary to twist two bundles of wires 10, one end of the insert block 42 can be inserted between two adjacent bundles of wires 10, and the first transmission wheel 31 can drive the rotating wheel 41 to rotate, and the rotating wheel 41 can drive the insert block 42 to rotate. When the insert block 42 rotates, it will first flip and wrap the wire 10 on one side around the wire 10 on the other side, and then prompt the two bundles of wires 10 to flip and wrap around each other until the two bundles of wires 10 are twisted to form a larger wire bundle 20, thereby achieving the effect of twisting each other. After the twisting is completed, it is only necessary to pull out the insert block 42, and then slightly rotate the part of the two bundles of wires 10 where the insert block 42 is located to complete the winding and twisting of the wire bundle 20. The whole process can realize automatic twisting, and the twisting can be carried out quickly by rotating the plug block 42, so the degree of automation is high, the operation is simple, and the efficiency is high.
[0028] The drive mechanism 2 includes a drive wheel 21, and a drive motor is capable of driving the drive wheel 21 to rotate. The transmission mechanism 3 also includes a rotating wheel 34. The rolling surface of the drive wheel 21 abuts against the rolling surface of the rotating wheel 34. Through the friction between the rolling surface and the rotating wheel 34, the rotation of the drive wheel 21 can drive the rotating wheel 34 to rotate. The first transmission wheel 31 is fixed to the central axis of the rotating wheel 34, so that the rotation of the rotating wheel 34 can drive the first transmission wheel 31 to rotate coaxially. In this embodiment of the utility model, the axial direction of the drive wheel 21 and the axial direction of the rotating wheel 34 are perpendicular to each other, so that the transmission direction of the drive wheel 21 is converted into an intersecting direction.
[0029] See also Figure 3 In order to directly drive the rotating wheel 41, the transmission mechanism 3 further includes a second transmission wheel 32. The rolling surface of the first transmission wheel 31 abuts against the rolling surface of the second transmission wheel 32. Through the action of friction, the first transmission wheel 31 can drive the second transmission wheel 32 to rotate. The rolling surface of the second transmission wheel 32 abuts against the rolling surface of the rotating wheel 41. Through the action of friction, the first transmission wheel 31 can drive the rotating wheel 41 to rotate through the second transmission wheel 32.
[0030] Since the insert block 42 rotates around one side, when the two bundles of silk threads 10 are flipped and wound, one side of the insert block 42 will be affected by the reaction force, which may easily cause an unbalanced force. In order to make the force on the insert block 42 balanced, the transmission mechanism 3 also includes a third transmission wheel 33. The rolling surface of the first transmission wheel 31 abuts against the rolling surface of the third transmission wheel 33. Through the action of friction, the first transmission wheel 31 can also drive the third transmission wheel 33 to rotate. The second transmission wheel 32 and the third transmission wheel 33 are symmetrically arranged on both sides of the first transmission wheel 31, and the second transmission wheel 32 and the third transmission wheel 33 are symmetrically arranged on both sides of the rotating wheel 41. The second transmission wheel 32 and the third transmission wheel 33 are both arranged on one side of the first transmission wheel 31 close to the rotating wheel 41. The rolling surface of the third transmission wheel 33 abuts against the rolling surface of the rotating wheel 41. The first transmission wheel 31 can simultaneously drive the rotating wheel 41 to rotate through the second transmission wheel 32 and the third transmission wheel 33. Therefore, the second transmission wheel 32 and the third transmission wheel 33 can drive the rotating wheel 41 from both sides of the rotating wheel 41 at the same time. In this way, no matter the rotating wheel 41 rotates forward or reverse, there is a transmission wheel that can support the rotating wheel 41 to offset the unilateral force acting on the rotating wheel 41, thereby achieving a force balance effect.
[0031] In order to enable the insert block 42 to be inserted between two adjacent bundles of silk threads 10, a through hole 411 is provided in the middle of the rotating wheel 41, and a threading notch 412 is provided on one side of the rotating wheel 41, wherein the threading notch 412 can accommodate two bundles of silk threads 10 to enter, and the threading notch 412 is connected to the through hole 411, and the adjacent two bundles of silk threads 10 can enter the through hole 411 from the threading notch 412. When in use, the distance between the two bundles of silk threads 10 can be narrowed so that the two bundles of silk threads 10 can pass through the threading notch 412. The wire notch 412 enters the through-hole 411, and on the outside of the through-hole 411, the spacing between the two bundles of wire 10 can accommodate the insertion of the insert block 42. When the rotating wheel 41 rotates, the wire notch 412 can rotate around the central axis of the through-hole 411, so that the insert block 42 can drive the two bundles of wire 10 to flip and wind, and the two bundles of wire 10 always remain in the through-hole 411 during the flipping and winding process, and the through-hole 411 has the effect of limiting the two bundles of wire 10.
[0032] See also Figure 4In order to facilitate the entry of the wires 10 into the threading notch 412, a threading inlet 61 is provided at the outer end of the fixing seat 6. The threading inlet 61 is in the shape of an "eight" with a wide outside and a narrow inside. In this way, under the guidance of the threading inlet 61, the distance between the two bundles of wires 10 can be reduced, making it easier for the wires 10 to enter the threading notch 412. During use, the threading notch 412 can periodically connect with the threading inlet 61 when rotating. When the twisting is completed and the plug block 42 needs to be pulled out, the threading notch 412 can be reset to a position connected to the threading inlet 61. In this way, when the plug block 42 is pulled out, the wire bundle 20 formed by the two bundles of wires 10 can be removed from the threading notch 412 and the threading inlet 61.
[0033] The first end of the insert block 42 is fixed to the side of the rotating wheel 41 away from the threading notch 412, and the second end of the insert block 42 extends toward the side of the threading notch 412, so that after the silk thread 10 is inserted into the threading notch 412 and the through-hole 411, the two bundles of silk threads 10 can be just located on both sides of the insert block 42, and the second end of the insert block 42 can be inserted between the two adjacent bundles of silk threads 10. When the rotating wheel 41 rotates, the second end of the insert block 42 can rotate around the central axis of the through-hole 411, thereby driving the silk threads 10 on both sides to flip and wind.
[0034] In order to ensure that the threading notch 412 is positioned facing outward when the insert block 42 is reset, the wheeled automatic thread twister further includes a limiting mechanism 5, which includes a telescopic block 51. The telescopic block 51 is movably arranged on the side of the rotating wheel 41. The telescopic block 51 can be telescoped, and specifically, the telescopic block 51 can move in a direction close to or away from the rotating wheel 41. A limiting protrusion 413 is provided on the side of the rotating wheel 41 away from the insertion block 42, and the limiting protrusion 413 protrudes toward the side away from the insertion block 42. The limiting protrusion 413 can rotate and move with the rotating wheel 41. After the silk thread 10 is twisted, the rotating wheel 41 rotates in the opposite direction, so that the threading gap 412 is directed toward the side away from the first transmission wheel 31 and connected with the threading entrance 61. At this time, the limiting protrusion 413 can abut against the telescopic block 51. The telescopic block 51 limits the further rotation of the rotating wheel 41 by limiting the limiting protrusion 413, so that the threading gap 412 remains connected with the threading entrance 61, so as to facilitate the removal of the twisted wire harness 20.
[0035] Furthermore, a contact surface 511 and a limiting surface 512 are respectively provided on both sides of one end of the telescopic block 51 close to the rotating wheel 41, and the two sides of one end of the rotating wheel 41 correspond to the positive rotation and negative rotation directions of the rotating wheel 41, respectively, wherein the contact surface 511 is an inclined surface, and the contact surface 511 is inclined from the side close to the rotating wheel 41 to the side away from the rotating wheel 41, and the angle between the limiting surface 512 and the contact surface 511 is an acute angle.
[0036] During use, when the rotating wheel 41 rotates forward, the silk thread 10 can be twisted. At this time, the limiting protrusion 413 can abut against the contact surface 511. Since the contact surface 511 is an inclined surface, the contact surface 511 is inclined from the side close to the rotating wheel 41 to the side away from the rotating wheel 41. After the limiting protrusion 413 abuts against the contact surface 511, a force is generated to make the telescopic block 51 move away from the rotating wheel 41. In this way, the contact surface 511 will not limit the limiting protrusion 413, and the limiting protrusion 413 can cross the telescopic block 51. The rotating wheel 41 can continue to rotate, and the silk thread 10 can continue to be twisted.
[0037] After the twisting is completed, since the extension direction of the insert block 42 is unknown after rotation and may not be consistent with the removal direction of the twisted wire bundle 20, the insert block 42 needs to be restored to its initial position so that the insert block 42 can be pulled out from between the two bundles of wires 10 and the twisted wire bundle 20 can be removed from the through hole 411. When the rotating wheel 41 rotates in the opposite direction, the insert block 42 can be restored to its initial position. Specifically, when the rotating wheel 41 rotates in the opposite direction, the limiting protrusion 413 moves in the opposite direction with the rotating wheel 41 and can abut against the limiting surface 512. The limiting surface 512 can limit the rotating wheel 41 from continuing to rotate. At this time, the position of the rotating wheel 41 corresponds exactly to the outward position of the insert block 42, so that the threading notch 412 is connected to the threading inlet 61, and the twisted wire bundle 20 can be removed from the threading notch 412.
[0038] To achieve the telescopic block 51's telescopic function, the limiting mechanism 5 further includes a fixed block 52 and an elastic member 53. The fixed block 52 is fixed to the side of the rotating wheel 41. One end of the elastic member 53 abuts the fixed block 52, while the other end of the elastic member 53 abuts the telescopic block 51. When the limiting protrusion 413 abuts the contact surface 511, the force exerted by the limiting protrusion 413 is greater than the force exerted by the elastic member 53 on the telescopic block 51, thereby causing the telescopic block 51 to move away from the rotating wheel 41. After the limiting protrusion 413 crosses the contact surface 511, the elastic member reduces the elastic force, causing the telescopic block 51 to return to a position close to the rotating wheel 41.
[0039] In an embodiment of the present invention, the housing 1 includes a handle portion 11, which is arranged on a side of the housing 1 away from the rotating wheel 41. Holding the handle portion 11 can use the rotating mechanism 4, and a switch button 111 is provided on the handle portion 11 for controlling the opening and closing of the driving mechanism 2.
[0040] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.
Claims
1. A wheel-type automatic wire twister for twisting wires, characterized in that: It includes a housing, a fixing seat, a driving mechanism arranged in the housing, a transmission mechanism connected to the driving mechanism and located on the fixing seat, and a rotating mechanism connected to the transmission mechanism; The transmission mechanism includes a first transmission wheel, and the rotating mechanism includes a rotating wheel and an insert block. The first transmission wheel can drive the rotating wheel to rotate. The insert block is fixed to the side of the rotating wheel. One end of the insert block can be inserted between two adjacent bundles of silk threads. The rotating wheel can drive the insert block to rotate around the central axis of the rotating wheel so that the two bundles of silk threads are twisted together into a bundle.
2. The wheel-type automatic wire twister according to claim 1, characterized in that: The driving mechanism includes a driving wheel, and the transmission mechanism also includes a rotating wheel. The rolling surface of the driving wheel abuts against the rolling surface of the rotating wheel. The driving wheel can drive the rotating wheel to rotate. The first transmission wheel is fixed on the central axis of the rotating wheel, and the rotating wheel can drive the first transmission wheel to rotate coaxially.
3. The wheel-type automatic wire twister according to claim 1, characterized in that: The transmission mechanism also includes a second transmission wheel, the rolling surface of the first transmission wheel abuts against the rolling surface of the second transmission wheel, the rolling surface of the second transmission wheel abuts against the rolling surface of the rotating wheel, and the first transmission wheel can drive the rotating wheel to rotate through the second transmission wheel.
4. The wheel-type automatic wire twister according to claim 3, characterized in that: The transmission mechanism also includes a third transmission wheel, the rolling surface of the first transmission wheel abuts against the rolling surface of the third transmission wheel, the second transmission wheel and the third transmission wheel are symmetrically arranged on both sides of the first transmission wheel, and the second transmission wheel and the third transmission wheel are both arranged on the side of the first transmission wheel close to the rotating wheel, the rolling surface of the third transmission wheel abuts against the rolling surface of the rotating wheel, and the first transmission wheel can simultaneously drive the rotating wheel to rotate through the second transmission wheel and the third transmission wheel.
5. The wheel-type automatic wire twister according to claim 1, characterized in that: A through-hole is provided in the middle of the rotating wheel, and a threading notch is provided on one side of the rotating wheel. The threading notch is connected to the through-hole, and two adjacent bundles of silk threads can enter the through-hole from the threading notch. When the rotating wheel rotates, the threading notch can rotate around the central axis of the through-hole. A threading entrance is provided at the outer end of the fixed seat, and the threading entrance is in the shape of an "eight" with a wide outside and a narrow inside. When the threading notch rotates, it can be periodically connected to the threading entrance.
6. The wheel-type automatic wire twister according to claim 5, characterized in that: The first end of the insert block is fixed to a side of the rotating wheel away from the threading notch, and the second end of the insert block extends toward a side of the threading notch. The second end of the insert block can be inserted between two adjacent bundles of silk threads. When the rotating wheel rotates, the second end of the insert block can rotate around the central axis of the perforation.
7. The wheel-type automatic wire twister according to claim 5, characterized in that: The wheel-type automatic wire twister also includes a limiting mechanism, which includes a telescopic block. The telescopic block is movably arranged on the side of the rotating wheel. A limiting protrusion is provided on the side of the rotating wheel away from the insertion block. The limiting protrusion protrudes toward the side away from the insertion block. The telescopic block can move in the direction close to or away from the rotating wheel. When the threading notch is toward the side away from the first transmission wheel and is connected to the threading entrance, the limiting protrusion can abut against the telescopic block.
8. The wheel-type automatic wire twister according to claim 7, characterized in that: A contact surface and a limiting surface are respectively provided on both sides of one end of the telescopic block close to the rotating wheel. The contact surface is an inclined surface that tilts from the side close to the rotating wheel to the side away from the rotating wheel. The angle between the limiting surface and the contact surface is an acute angle. When the rotating wheel rotates in the forward direction, the limiting protrusion can abut against the contact surface and drive the telescopic block away from the rotating wheel, so that the limiting protrusion can cross over the telescopic block; When the rotating wheel rotates in the reverse direction, the limiting protrusion can abut against the limiting surface, and the limiting surface can restrict the rotating wheel from continuing to rotate and connect the threading notch with the threading entrance.
9. The wheel-type automatic wire twister according to claim 7, characterized in that: The limiting mechanism further includes a fixed block and an elastic member, wherein the fixed block is fixed to the side of the rotating wheel, one end of the elastic member abuts against the fixed block, and the other end of the elastic member abuts against the telescopic block.
10. The wheel-type automatic wire twister according to claim 1, characterized in that: The housing includes a handle portion, which is arranged on a side of the housing away from the rotating wheel, and a switch button is provided on the handle portion.