Expansion device of wire collecting pipe and wire collecting device

Abstract

The utility model relates to an expansion device of a wire collecting pipe and a wire collecting device, the wire collecting pipe is provided with a hollow installation cavity and is sleeved outside a motor shaft, the expansion device comprises a body, the body is of a columnar structure and extends into the installation cavity to be connected with one end of the motor shaft, and the body comprises an expansion block which is sleeved at the output end of the motor shaft and is connected with the output end of the motor shaft. The expansion block has displacement in the radial direction, and a gap between the outer peripheral wall of the expansion block and the inner side wall of the wire collecting pipe is adjustable; the end, close to the wire collecting pipe, of the driving assembly is arranged in the mounting cavity, the driving assembly is connected with the end of the expansion block, the expansion block is driven to move in a reciprocating mode in the set direction, and an adjusting structure for adjusting the gap between the peripheral wall of the expansion block and the inner wall of the wire collecting pipe is formed. The expansion block is driven by the driving assembly to reciprocate in the radial direction, the expansion degree of the expansion block and the inner wall of the wire collecting pipe is adjusted, the replacement efficiency of the wire collecting pipe is improved, meanwhile, damage to the wire collecting pipe in the replacement process is avoided, and the service life of the wire collecting pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic flat wires, in particular to an expansion device of a wire collection tube and a wire collection device. Background Art

[0002] Plastic woven bags are often used in daily life. They are widely used for food and chemical packaging. The main production process is to make plastic raw materials into flat wires through processes such as film extrusion, cutting, and unidirectional stretching. The obtained flat wires are woven on a circular loom to obtain the finished woven bag. After the flat wires are made, they need to be rolled into a cylindrical shape for use in subsequent processes.

[0003] In the prior art, during the winding process of the flat wire, manual collection and winding is usually adopted, and the flat wire needs to be manually moved laterally along the axial direction of the winding shaft. Manual replacement and installation of the wire collection tube is labor-intensive, and the wire collection tube needs to be readjusted to the appropriate position after replacement, which also reduces the efficiency of replacing the wire collection tube. The above problems need to be solved urgently. Utility Model Content

[0004] To solve the above technical problems, the utility model discloses a tightening device for a wire collecting tube, the wire collecting tube having a hollow installation cavity, which is sleeved on the outside of the motor shaft, the tightening device comprising a main body, the main body having a columnar structure extending into the installation cavity and connected to one end of the motor shaft, the main body comprising a tightening block, which is sleeved on the output end of the motor shaft, the tightening block having a displacement in a radial direction, and an adjustable gap between the outer peripheral wall of the tightening block and the inner wall of the wire collecting tube; a driving component, which is arranged in the installation cavity near the end of the wire collecting tube, the driving component is connected to the end of the tightening block, drives the tightening block to reciprocate along a set direction, and forms an adjusting structure for adjusting the gap between the tightening block and the inner wall of the wire collecting tube along the radial direction.

[0005] Specifically, it also includes a positioning member, which extends in the axial direction and includes a positioning portion and a guide portion. The positioning portion is sleeved on the end of the motor shaft, one end of the positioning portion is connected to the guide portion, and the other end of the guide portion has a plurality of guide ridges arranged obliquely to the axial direction. The expansion block is provided with an inclined sliding groove, and the guide ridge is inserted into the sliding groove and is slidably connected to the sliding groove to form a guide structure for moving the expansion block in a set direction.

[0006] Specifically, the guide ridges are evenly arranged along the circumferential direction of the guide portion.

[0007] Specifically, a buffer gap is provided between the positioning portion and the expansion block in the axial direction.

[0008] Specifically, it also includes a limiting member arranged on the outer periphery of the positioning portion, the limiting member is fixedly connected to one end of the positioning portion, and the limiting member protrudes in the radial direction and is movably connected to the tightening block to form a limiting structure for limiting the movement of the tightening block.

[0009] Specifically, the outer peripheral wall of the expansion block is arranged as a stepped structure, the stepped structure has a plurality of pressure-bearing surfaces and connecting surfaces, and the plurality of pressure-bearing surfaces are extended along the axial direction and abut against the inner wall of the wire collecting tube to form a pressure-bearing structure.

[0010] Specifically, the driving assembly includes an air inlet and an exhaust valve, the air inlet and the exhaust valve are arranged at intervals along the axis, and the air inlet has an activity amount that moves along the axial direction, forming a control structure for controlling the on and off of the exhaust valve.

[0011] Specifically, the driving assembly also includes a propulsion rod and a buffer member both extending in the axial direction. The buffer member is coaxially arranged with the wire collecting tube, and the buffer member is arranged between the propulsion rod and the tightening block. The buffer member, which has an axial deformation amount formed when receiving the thrust of the propulsion rod, drives the tightening block to reciprocate axially.

[0012] The utility model also discloses a wire collecting device, which includes a wire collecting tube, a sliding assembly and a tightening device of the wire collecting tube as described above and installed on the inner side of the wire collecting tube. The sliding assembly is arranged above the wire collecting tube. When the wire collecting tube reels the wire, the wire drives the sliding assembly to move back and forth along the axial direction of the wire collecting tube.

[0013] Advantages

[0014] The utility model controls the driving component to drive the expansion block to move back and forth along the set direction, thereby adjusting the expansion degree of the outer wall of the expansion block and the inner wall of the wire collecting tube, thereby improving the replacement efficiency of the wire collecting tube and also avoiding damage to the wire collecting tube during the replacement process, thereby ensuring the installation accuracy during the replacement process and increasing the service life of the wire collecting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the expansion device of the utility model;

[0016] Figure 2 for Figure 1 A magnified view of the local structure;

[0017] Figure 3 It is a structural schematic diagram of the wire collecting device of the utility model.

[0018] legend:

[0019] 1. First motor; 12. Piston cylinder; 13. Piston; 14. Exhaust core; 15. Propulsion block; 16. Propulsion rod; 17. Propulsion spring; 18. Expansion block; 181. Sliding groove; 182. Step structure; 19. Positioning member; 191. Positioning part; 192. Guide part; 1921. Support rib; 1922. Guide rib; 20. Air inlet; 21. Limiting member; 22. Second slide bar; 35. Active ball; 36. Wire collecting tube; 37. Lifting assembly; 41. Propulsion guide rod; 42. Transmission ball; 43. Steel ball positioning member; 44. Inner track; 45. Retaining frame; 46. Second slide bar. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the terms "first" and "second" are used to distinguish different objects rather than to describe a specific order.

[0022] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0023] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0024] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0025] The present invention will be further described below in conjunction with the embodiments, but is not limited to the contents of the specification.

[0026] Embodiment 1

[0027] The utility model relates to an expansion device for a wire collection tube. The wire collection tube 36 has a hollow installation cavity and is sleeved outside a motor shaft. The expansion device comprises a body. The body is a columnar structure and extends into the installation cavity and is connected to one end of the motor shaft.

[0028] It should be noted that if Figure 1 and Figure 2 As shown, the tightening device includes a tightening block 18, which is sleeved on the output end of the motor shaft, and the tightening block 18 has a displacement in the radial direction, and the gap between the outer peripheral wall of the tightening block 18 and the inner wall of the wire collecting tube 36 is adjustable; a driving component is arranged in the installation cavity near the end of the wire collecting tube 36, and the driving component is connected to the end of the tightening block 18 to drive the tightening block 18 to reciprocate in the radial direction, thereby forming an adjusting structure for adjusting the gap between the tightening block 18 and the inner wall of the wire collecting tube 36 in the radial direction.

[0029] In this embodiment, if Figure 1 and Figure 2 As shown, the driving component is configured as a pneumatic piston member, and an axially extending air inlet 20 is provided at the second end of the pneumatic piston member near the wire collecting tube 36, and the air inlet 20 can move in the axial direction, and an exhaust valve is provided at the relative position of the air inlet 20, for example, it can be a common exhaust core 14, the exhaust core 14 is arranged on the piston cylinder 12, and the air inlet 20 and the exhaust core are both arranged on the axial center line, the exhaust core is respectively connected to the air inlet 20 and the piston cylinder, and the air inlet 20 and the exhaust core 14 are arranged at intervals along the axial center line for the axial movement of the air inlet 20; when the gas is inhaled, it enters from the left side of the air inlet 20, and enters the piston cylinder 12 through the air inlet 20 and the exhaust core 14 in turn, at this time, the channels of the air inlet 20 and the exhaust core 14 form a channel for gas flow, that is, the air intake direction is along the first end of the wire collecting tube 36 toward the direction of the motor shaft, from Figure 2 In the figure, the air intake direction is from left to right, and correspondingly, the exhaust direction is from the inside of the wire collecting tube 36 to the left. The specific structure and distribution position of the expansion device are introduced in detail in this direction below.

[0030] When exhausting, press the left end of the air inlet 20 to make the air inlet 20 move axially and transfer the pressure to the exhaust core 14 to open the exhaust core 14. It can be seen that the air inlet 20, on the basis of realizing the intake and exhaust, can also act as a switch to control the on and off of the exhaust core 14, avoiding the use of additional switching devices, simplifying the operation and saving production costs.

[0031] A piston 13 is provided in the piston cylinder 12 and moves from left to right along the axial direction. At this time, the right end of the piston 13 is annularly sleeved on the outside of the motor shaft. A plurality of propulsion rods 16 extending along the axial direction are connected to the right end of the piston 13, and the plurality of propulsion rods 16 are arranged at equal intervals around the outer circumference of the motor shaft. The right ends of the plurality of propulsion rods 16 are connected to a propulsion block 15, and the propulsion block 15 also has an annular structure. The outer diameter of the propulsion block 15 is smaller than the inner diameter of the wire collecting tube 36. On this basis, a tightening block 18 is provided on the edge of the propulsion block 15. The tightening block 17 can be formed as a whole. For example, the tightening block 18 is formed into a hollow truncated cone, and the larger cross-sectional diameter in the truncated cone structure is slightly smaller than the inner diameter of the wire collecting tube 36. Since the tightening block 18 can move radially, it can be ensured that the outer peripheral wall of the tightening block 18 can squeeze the wire collecting tube 36, thereby achieving the function of locking the wire collecting tube 36, which is convenient for tube replacement.

[0032] Alternatively, the expansion block 18 can also be formed by a combination of multiple identical structures. For example, in the present embodiment, the expansion block is a strip structure, and the inner and outer walls of the expansion block are both arranged as a stepped structure. At this time, the left side of the expansion block 18 is clamped on the peripheral side of the thrust block 15. After the installation is completed, the shape of the inner wall of the expansion block 18 is adapted to the shape of the motor shaft, that is, the right end of the expansion block 18 is embedded in the mounting groove of the motor shaft to avoid the movement of the expansion block 18 in the axial direction, so that the expansion block 18 can only move radially.

[0033] In addition, the number of the tightening blocks 18 can be set to three, four, or six, as long as it is higher than three, and the tightening blocks 18 are arranged at equal intervals. For example, in the present embodiment, the number of the tightening blocks 18 is three, which can ensure that the tightening blocks 18 can stably lock the wire collecting tube 36 while avoiding the wire collecting tube 36 from falling off during the tube replacement process due to uneven force, or causing deformation of the tube wall of the wire collecting tube 36, thereby reducing the service life of the wire collecting tube 36 and further improving the stability of the device.

[0034] like Figure 1 and Figure 2 As shown, there is a movable gap along the radial direction between the inner side wall of the tightening block 18 and the motor shaft, and the movable gap is greater than or equal to the moving distance of the tightening block 18.

[0035] It should be noted that the shape of the inner wall of the tightening block 18 can be adapted to the shape of the motor shaft at that location. At this time, a gap is set between the inner wall of the tightening block 18 and the outer peripheral wall of the motor shaft, and an installation space can also be provided for the tightening block 18. Correspondingly, the movable gap has a positioning function, which improves the installation efficiency of the tightening block 18 and ensures that the tightening block 18 can move in the radial direction. Through the radial movement of the tightening block, the tightening block 18 and the inner wall of the wire collection tube 36 can be pressed or separated.

[0036] Since the expansion block 18 has a radial movement, in order to improve the stability of movement, the expansion device also includes a positioning member 19, which extends in the axial direction, including a positioning portion 191 and a guide portion 192, wherein the positioning portion 191 is sleeved on the end of the motor shaft, one end of the positioning portion 191 is connected to the guide portion 192, and the other end of the guide portion 192 has a plurality of guide ribs 1922 arranged obliquely to the axial direction, and the expansion block 18 is provided with an inclined sliding groove 181, and the guide ribs 1922 are inserted into the sliding groove 181 and are slidably connected to the sliding groove 181 to form a guiding structure for moving the expansion block 18 in a set direction.

[0037] It should be pointed out that the positioning portion 191 of the positioning member 19 is annularly fixed on the motor shaft and rotates synchronously with the motor shaft. The guide portion 192 is integrally formed with the positioning portion 191. Therefore, the guide portion 192 is also fixed on the motor shaft. In order to cooperate with the expansion block 18, the guide portion 192 is formed by extending and bending the left end of the positioning portion 191 to the left. Specifically, the left end of the positioning portion 191 extends and bends 90° outward in the radial direction, and then the free end continues to bend 90° toward the expansion block 18 to form a supporting rib 1921. Finally, the free end of the supporting rib 1921 is bent obliquely downward toward the axis direction to form a guiding rib 1922. At this time, the length of the guiding rib 1922 is equal to the length of the sliding groove 181 and the inclination angle is equal. At this time, the supporting rib 1921 and the motor shaft form a buffer cavity to avoid damage to the supporting rib 1921 due to excessive thrust to the right, thereby further improving the structural strength of the positioning member 19.

[0038] Since the guide rib 1922 rotates synchronously with the motor shaft and is fixed relative to the motor shaft, when the expansion block 18 is pushed axially, the sliding groove and the guide rib can be slidably matched, and when the end of the guide rib 1922 abuts against the bottom of the sliding groove 181, the bottom of the groove and the support rib 1921 form a limiting effect on the guide rib 1922, reducing the friction resistance in the axial and radial directions, while reducing the thrust from left to right and reducing energy consumption.

[0039] The outer peripheral wall of the expansion block 18 is arranged as a stepped structure, wherein the stepped structure has a plurality of pressure-bearing surfaces and connecting surfaces, and the pressure-bearing surfaces are arranged to extend in the axial direction.

[0040] When the expansion device opens the exhaust core 14, the outermost pressure-bearing surface of the expansion block 18 can be pressed evenly against the inner wall of the wire collecting tube 36, ensuring that the pressure-bearing surface of the expansion block 18 and the wire collecting tube 36 are in surface contact, increasing the force range of the contact surface, and ensuring the stability of the wire collecting tube 36 after the force is applied.

[0041] During actual operation, since the expansion block 18 can move along the radial direction of the wire collecting tube 36 and can also move along the axial direction, the connecting inflection point between the pressure-bearing surface and the connecting surface is set to a smooth arc shape, and the angle between the pressure-bearing surface and the connecting surface is an obtuse angle. At this time, the arc-shaped inflection point has a certain buffering effect on the pressure-bearing surface, which can ensure that the expansion block can move smoothly to the set position, reduce the degree of wear on the inflection point, and increase the service life of the expansion block 18.

[0042] In this embodiment, if Figure 2 and Figure 3 As shown, the driving assembly also includes a power member and a buffer member both extending in the axial direction. The buffer member is coaxially arranged with the wire collecting tube 36, and the buffer member is arranged between the power member and the tightening block 18. The buffer member with an axial deformation drives the tightening block to move axially back and forth.

[0043] It should be noted that the buffer member can be a propulsion spring 17, or it can also be a memory alloy. In this embodiment, the elastic member is set as a propulsion spring 17, which has low manufacturing cost and is easy to produce; the propulsion spring can be set between the propulsion rod 16 and the propulsion block 15, or the propulsion spring 17 can also be set on the outer periphery of the propulsion rod 16, and the length of the propulsion rod 16 is less than the length of the propulsion spring 17. As long as it can be ensured that when the propulsion block 16 is pushed to the right, the thrust in the right direction is converted into the pressure of the propulsion spring 17. When the thrust to the right gradually increases and reaches the maximum elastic potential energy of the propulsion spring 17, the elastic potential energy generated by the propulsion spring 17 prompts the propulsion block to move to the left. It can be seen that the propulsion spring 17 is set on the piston member, which can have a certain buffering effect on the thrust and tension of the piston, avoiding a sudden change in the amount of gas in the air inlet 20 or the exhaust core 14, so that the force acting on the expansion block 12 suddenly increases or decreases, thereby damaging the expansion block 18 or the positioning member 19, increasing the maintenance cost, and improving the service life of the device.

[0044] In addition, due to the different materials of the expansion block 18, the range of the thrust received is also different. After the material is determined, the elastic coefficient of the thrust spring 17 is also determined. Correspondingly, the maximum air pressure in the piston cylinder 12 is also a constant. For example, in this embodiment, when the maximum air pressure of the piston cylinder 12 is 0.4MPa, the elastic potential energy of the thrust spring is the largest, and the restoring force of the thrust spring 17 is converted into the pulling force of the thrust rod 16. It can be seen that in this embodiment, the smaller thrust required by the expansion device can achieve radial movement of the expansion block 18, reduce energy consumption, and have a certain buffering effect.

[0045] The expansion device also includes a limit member 21 arranged on the outer periphery of the positioning portion 191, the limit member 21 is fixedly connected to one end of the positioning portion 191, and the limit member 21 protrudes in the radial direction and is movably connected to the expansion block 18 to form a limit structure for limiting the movement of the expansion block 18.

[0046] The limiting member 21 can be set as a sleeve, which is sleeved on the outer peripheral wall of the positioning part and fixedly connected to the positioning part. The outer peripheral wall of the sleeve is extended in the axial direction. At this time, the sleeve is in a hollow bowl shape, and the end of the sleeve protrudes from the positioning part and is flush with the right end of the guide convex rib 1922. At this time, the sleeve can protect the positioning member, and the sleeve can also form a certain limiting effect on the expansion block 18, which can prevent the expansion block from continuing to move to the right when it moves to the maximum position to the right, thereby preventing damage to the positioning member. At the same time, the sleeve can also support the wire collecting tube.

[0047] It can be understood that during the rotation of the wire collecting tube 36, the inner wall of the right end of the wire collecting tube 36 abuts against the bearing seat sleeve of the motor shaft, and the inner wall of the other end of the wire collecting tube abuts against the limit piece 21 of the tightening device. At this time, a supporting effect can be formed for the wire collecting tube 36, thereby improving the stability of the wire collecting tube 36 during rotation.

[0048] Working principle: During the wire collecting process of the wire collecting tube 36, when the outer diameter of the wire collecting tube 40 wrapped with the wire 40 reaches 90-160mm, the wire collecting tube 36 needs to be replaced. At this time, the air inlet 20 is opened, and the gas enters the piston cylinder 12 from the air inlet 20. The gas is compressed in the piston cylinder 12 to push the piston 13 to move away from the air inlet 20 (move to the right), and the piston 13 can push the propulsion rod 16 to move (micro-motion). When the propulsion rod 16 moves, the propulsion spring 17 sleeved on the outer periphery of the propulsion rod 16 will be squeezed and deformed, that is, the thrust of the gas is converted into the propulsion The elastic potential energy of the spring 17 is the maximum when the amount of gas entering reaches a certain level. The elastic potential energy of the propulsion spring 17 connected to the propulsion rod 16 is converted into a restoring elastic force. The elastic force pulls the piston 13 toward the air inlet 20 through the propulsion rod 16, that is, from right to left. The propulsion rod 16 pulls the tightening block 18 to move to the left through the propulsion block 15. The gap between the outer wall of the tightening block 18 and the inner wall of the wire collection tube 36 gradually increases, and the pressure of the tightening block 18 on the wire collection tube 36 disappears. At this time, the wire collection tube 36 can be replaced.

[0049] When it is necessary to reel the wire 40 into the wire collecting tube 36, the air inlet 20 is pressed axially inward so that the air inlet 20 abuts against the exhaust core 14, and the gas in the piston cylinder 12 flows out from the exhaust core 14. The gas pressure inside the piston cylinder 12 is reduced, and the propulsion spring 17 arranged inside the piston pulls the propulsion rod 16 to move to the right, and the propulsion rod 16 drives the propulsion block 15 to squeeze the tightening block 18, so that the tightening block 18 moves in the track defined by the positioning member 19. At this time, the outer wall of the tightening block 18 presses against the inner wall of the wire collecting tube 36, and the tightening block 18 forms an outward pressure on the inner wall of the wire collecting tube 36. The wire collecting tube 36 is in a locked state, and the tightening block 18 in the locked state can also support the wire collecting tube 36, which can ensure the stable rotation of the wire collecting tube 36 and prepare conditions for the operation of the fully automated manipulator.

[0050] Embodiment 2

[0051] In this embodiment, the expansion device of the wire collection tube is applied to the wire collection device, such as Figure 1 As shown, at this time, the wire collecting process of the wire collecting tube 36 and the process of replacing the wire collecting tube 36 through the expansion device can be operated by different motors, specifically, including two motors, the first motor is connected to the wire collecting tube 36, at this time, the first motor controls the rotation of the wire collecting tube, and the second motor is connected to the lifting component connected to the expansion device to lift the wire collecting tube 36, and the first motor 1 and the second motor are selectively turned on or off. For example, when the wire collecting tube 36 needs to be replaced, the first motor 1 is cut off and the second motor is started at the same time to control the locking of the wire collecting tube 36, and then the wire collecting tube 36 is replaced. After the wire collecting tube 36 is replaced, the second motor stops running and controls the first motor 1 to start, driving the wire collecting tube 36 to rotate, so as to collect the silk thread 40. The winding process is completed alternately. In addition, the tube changing process can be automatically controlled to change the tube, or it can be manually changed. In order to improve the efficiency of tube changing, in this embodiment, the lifting component 37 is started by the second motor 23 to control the wire pressing roller 21 and the rolling guide wheel 32 to move upward synchronously, so that the wire pressing roller 21 is separated from the wire collecting tube 36. At this time, the tightening device 39 can automatically replace the wire collecting tube 36. When the tightening device is started, the tightening device can lock the wire collecting tube, thereby ensuring the replacement efficiency of the wire collecting tube and ensuring that the wire collecting tube 36 can be collected in time after replacement, saving replacement time, and improving the replacement accuracy. It can avoid damage to the wire collecting tube 36 due to improper operation and increase the service life of the wire collecting tube.

[0052] It can be understood that a controller can be provided in the tensioning device, and correspondingly, a sensor can be provided near the wire collecting tube 36. The sensor is electrically connected to the controller, can receive signals sent by the sensor, and can analyze the signals sent by the sensor according to a set program, and timely control the operating state of the tensioning device, wherein the sensor can be set as a height sensor for monitoring the outer diameter of the wire collecting tube 36, or can also be set as a sensor for monitoring the weight of the wire collecting tube; when the sensor receives that the outer diameter of the wire collecting tube 36 reaches a set value, or when the sensor receives that the weight of the wire collecting tube 36 reaches a set value, the wire collecting tube 36 stops collecting wire, starts the lifting assembly 37, and then replaces the tube. In this way, the controller controls the tensioning device to replace the wire collecting tube, saving labor costs.

[0053] For example, when the outer diameter of the wire collecting tube 36 reaches 90-160 mm, or when the weight of the wire collecting tube 36 reaches 1-3 kg, preferably, when the outer diameter of the wire collecting tube 36 reaches 95 mm, the expansion device is started to change the wire. In this embodiment, when the outer diameter of the wire collecting tube 36 reaches 95 mm, it can be detected by a weight sensor, or the outer diameter of the wire collecting tube can be calculated by the rotation speed of the wire collecting tube 36 combined with the thickness of the wire, so as to avoid the wire 40 wound by the wire collecting tube 36 being too heavy, reduce the assembly accuracy of the expansion device for replacing the wire collecting tube 36, and thus affect the wire changing efficiency of the wire changing tube 36.

[0054] In other embodiments, the increased number of turns of the wire 40 wound around the outer wall of the wire collecting tube 36 can be calculated per unit time based on the rotation speed of the first motor shaft, so that the wire collecting tube 36 can be replaced in time according to the rotation time of the wire collecting tube 36, and so on, as long as the wire collecting tube 36 can be automatically replaced after running for a period of time.

[0055] In addition, if Figure 3 As shown, since the wire 40 reciprocates along the axial direction of the wire collecting tube 36, a sliding assembly is installed above the wire collecting tube 36. The sliding assembly is slidably connected to the second sliding rod 22 parallel to the wire collecting tube 36, and the second sliding rod 22 reciprocates in the axial direction.

[0056] It can be understood that the sliding assembly includes a slider 11 and a groove rail 9, wherein the slider 11 has a hollow rolling chamber, including an active ball 35, a transmission ball 42, a steel ball positioning member 43 and a retaining frame 45, wherein the active ball 35 is arranged at the bottom of the rolling chamber and partially exposed to roll with the groove rail 9, transmission balls 42 are respectively installed on both sides of the active ball 35, and a steel ball positioning member 43 is installed on the top of the active ball 35, and the active ball 35 is rollingly connected with the transmission ball 42 and the steel ball positioning member 43 The upper part of the steel ball positioning member 43 and the bottom of the retaining frame 45 have an amount of movement along the height direction. The retaining frame 45 is set as a bearing. When the active ball 35 rolls in the groove rail 9, the groove rail 9 generates an upward supporting force on the active ball 35, and transmits the upward pressure to the transmission ball 42. At this time, the steel ball positioning member 43 limits the upward movement of the active ball 35, ensuring that the active ball 35 drives the retaining frame 45 to transmit the rotational force to the second slider 46, driving the second slider 46 to slide back and forth along the axial direction of the propulsion guide rod.

[0057] Furthermore, the sliding assembly is fixedly connected to the outer peripheral wall of the propulsion guide rod 41 disposed above the sliding assembly, and when the sliding assembly slides left and right along the second slide rod 22, it can drive the propulsion guide rod 41 to reciprocate along the axial direction.

[0058] At this time, a linear bearing structure is formed on the active ball 35, the transmission ball 42, the steel ball positioning member 43 and the retaining frame 45, and the friction is gapless friction. For example, the diameter of the active ball 35 is 2-4 cm, and the diameter of the transmission ball 42 is smaller than the diameter of the active ball 35. During the rotation of the active ball 35, the active ball 35 always abuts against the bottom of the steel ball positioning member 43, so that the active ball 35 can limit the position of the transmission ball 42 through the steel ball positioning member 43, thereby improving the stability of the active ball 35 during the rotation process.

[0059] In addition, the connecting line of the center of gravity of the active ball 35, the steel ball positioning member 43 and the retaining frame 45 is arranged in parallel along the height direction, which can further prevent the active ball 35 from being eccentric during rotation, thereby increasing friction, avoiding damage to the active ball 35 and wear of the transmission ball 42 during rotation, increasing maintenance costs, and increasing energy consumption.

[0060] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the embodiments here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A tightening device for a wire collection tube, characterized in that: The wire collecting tube (36) has a hollow installation cavity, which is sleeved outside the motor shaft. The tightening device includes a main body, which is a columnar structure and extends into the installation cavity and is connected to one end of the motor shaft. The main body includes an expansion block (18) which is sleeved on the output end of the motor shaft. The expansion block (18) has a displacement in the radial direction, and the gap between the outer peripheral wall of the expansion block (18) and the inner wall of the wire collecting tube (36) is adjustable; a driving component is arranged in the installation cavity near the end of the wire collecting tube (36). The driving component is connected to the end of the expansion block (18) and drives the expansion block (18) to reciprocate along a set direction, thereby forming an adjustment structure for adjusting the gap between the expansion block (18) and the inner wall of the wire collecting tube (36) in the radial direction.

2. The expansion device of the wire collection tube according to claim 1 is characterized in that: It also includes a positioning member (19) extending in the axial direction, the positioning member includes a positioning portion (191) and a guiding portion (192), the positioning portion (191) is sleeved on the end of the motor shaft, one end of the positioning portion (191) is connected to the guiding portion (192), the other end of the guiding portion (192) has a plurality of guiding ridges (1922) arranged obliquely with respect to the axial direction, the expansion block (18) is provided with an inclined sliding groove (181), the guiding ridges (1922) are inserted into the sliding groove (181), and are slidably connected to the sliding groove (181), so as to form a guiding structure for moving the expansion block (18) in a set direction.

3. The expansion device of the wire collection tube according to claim 2 is characterized in that: The plurality of guide ridges (1922) are evenly arranged along the circumferential direction of the guide portion.

4. The expansion device for the wire collection tube according to claim 3 is characterized in that: A buffer gap is provided between the positioning portion (191) and the expansion block (18) in the axial direction.

5. The expansion device of the wire collection tube according to claim 2, characterized in that: It also includes a limiting member (21) arranged on the outer periphery of the positioning portion (191), the limiting member (21) is fixedly connected to one end of the positioning portion (191), and the limiting member (21) is protruding in the radial direction and is movably connected to the expansion block (18), forming a limiting structure for limiting the movement of the expansion block (18).

6. The expansion device for the wire collection tube according to claim 1, characterized in that: The outer peripheral wall of the expansion block (18) is arranged as a stepped structure, the stepped structure has a plurality of pressure-bearing surfaces and connecting surfaces, and the plurality of pressure-bearing surfaces are arranged to extend in the axial direction and abut against the inner wall of the wire collecting tube (36) to form a pressure-bearing structure.

7. The expansion device for the wire collection tube according to claim 1, characterized in that: The driving assembly comprises an air inlet (20) and an exhaust valve (14), wherein the air inlet (20) and the exhaust valve (14) are arranged at intervals along an axial line, and the air inlet (20) has an amount of movement that moves in an axial direction, forming a control structure for controlling the on and off of the exhaust valve (14).

8. The expansion device for the wire collection tube according to claim 7, characterized in that: The driving assembly also includes a propulsion rod (16) and a buffer member both extending in the axial direction. The buffer member is coaxially arranged with the wire collecting tube (36), and the buffer member is arranged between the propulsion rod (16) and the tightening block (18). The buffer member has an axial deformation amount formed when receiving the thrust of the propulsion rod (16), and drives the tightening block to move axially back and forth.

9. A wire collecting device, characterized in that: It includes a wire receiving tube, a sliding assembly and a tightening device of the wire receiving tube as described in any one of claims 1 to 8 installed on the inner side of the wire receiving tube. The sliding assembly is arranged above the wire receiving tube. When the wire receiving tube reels the wire, the wire drives the sliding assembly to reciprocate along the axial direction of the wire receiving tube.

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