An automatic tensioning mechanism for retracting and paying out wires for preparing diamond wire busbars

Abstract

The invention discloses an automatic tensioning mechanism for taking up and paying out a diamond wire for preparing a diamond wire busbar, which relates to the field of wire winding technology. The mechanism comprises a machine base and a frame vertically fixed on the machine base; it also comprises a winding unit, a tightening unit and a wire shifting unit; during the winding process of the winding drum rotating, the tightening unit continuously produces a reverse pulling effect on the diamond wire busbar at one end of the winding drum, so that the diamond wire busbar between the tightening unit and the winding unit can always be kept in a tensioned and straight state, thereby improving the tightness of the diamond wire busbar wound on the winding drum, and avoiding the phenomenon of local looseness of the wound diamond wire busbar; at the same time, the diamond wire busbar is axially shifted by a shift fork, so that the diamond wire busbar can be circumferentially wound on the winding drum while being axially offset along the winding drum, so that the diamond wire busbar can be spirally reciprocated and wound on the winding drum layer by layer, effectively avoiding the occurrence of local accumulation or uneven winding of the diamond wire busbar on the winding drum.

Description

Technical Field

[0001] The invention belongs to the technical field of wire winding, and specifically refers to an automatic tensioning mechanism for retracting and paying out wires for preparing a diamond wire busbar. Background Art

[0002] Diamond wire is made of diamond wire mother wire as the base, and abrasive is coated on the mother wire. Diamond wire mother wire is usually drawn from high carbon steel wire.

[0003] In the process of preparing the diamond wire busbar, a winding roller is usually required to take it up. Since the diamond wire busbar has a certain toughness, the diamond wire busbar wound on the winding roller may become partially loose or concentrated at a certain point of the winding roller during the process of taking it up, thereby affecting the overall tightness and flatness of the diamond wire busbar wound on the winding roller. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an automatic tensioning mechanism for retracting and paying out wires for preparing a diamond wire busbar, which at least partially solves the above problem.

[0005] The technical solution adopted by the present invention is as follows:

[0006] The present invention provides an automatic tensioning mechanism for retracting and releasing wires for preparing a diamond wire busbar, comprising a machine base and a frame vertically fixed on the machine base; and further comprising:

[0007] The winding unit is rotatably mounted on the frame and comprises a winding drum for winding the diamond wire busbar and a plurality of groups of wire blocking rods circumferentially arranged on the winding drum;

[0008] A driving unit, which is arranged on the frame and is used to drive the winding unit;

[0009] The tightening unit is arranged on the machine base, and comprises a first base fixed on the machine base, a first support frame fixed on the first base, and a lower rotating roller and an upper rotating roller rotatably mounted on the first support frame, a gap is provided between the lower rotating roller and the upper rotating roller, and a first driving motor for driving the lower rotating roller is installed on one side of the first base;

[0010] A reciprocating wire-shifting unit is arranged on a frame, and comprises a mounting base fixed on the frame, a fixing plate fixedly mounted on the mounting base, a guide rod horizontally mounted on the fixing plate, and a slide plate slidably sleeved on the guide rod, a shift fork extending into the gap is installed at the end of the slide plate, and a wire-holding groove adapted to the diamond wire busbar is provided on the shift fork; a reciprocating driving member for driving the slide plate to reciprocate is also arranged on the frame.

[0011] Furthermore, a clamping member is provided on the first support frame, and the clamping member includes a sliding groove vertically opened on the first support frame and a sliding block slidably embedded in the sliding groove. Both ends of the upper rotating roller are rotatably installed on the corresponding sliding blocks. A limiting sliding rod movably passing through the first support frame is vertically installed on the upper end of the sliding block. A spring abutting against the sliding block is provided in the sliding groove, and the spring is movably sleeved on the limiting sliding rod.

[0012] Furthermore, the reciprocating drive member includes a rotating shaft rotatably mounted on the frame, a reciprocating screw rod is coaxially fixed on the rotating shaft, a reciprocating spiral groove is provided on the reciprocating screw rod, a pin shaft is rotatably mounted on the slide plate, and a crescent pin matching the reciprocating spiral groove is connected to the pin shaft.

[0013] Furthermore, a guide unit is provided on the machine base, and the guide unit is located on the side of the tightening unit away from the winding unit. The guide unit includes a second base fixed on the machine base, a second support frame fixed on the second base, and a lower guide roller and an upper guide roller rotatably mounted on the second support frame, the lower guide roller is provided with a lower spiral guide groove, and the upper guide roller is provided with an upper spiral guide groove, and the lower spiral guide groove and the upper spiral guide groove rotate in opposite directions and are adapted to each other; a second driving motor for driving the lower guide roller is installed on one side of the second base, and the lower guide roller and the upper guide roller are both provided with mutually meshing synchronous gears.

[0014] Furthermore, the winding unit also includes a mounting sleeve fixed on the frame and a hollow rotating drum rotatably mounted in the mounting sleeve, and the hollow rotating drum is coaxially and fixedly connected to the winding drum.

[0015] Furthermore, a driving wheel is installed on the hollow drum, and a driven wheel is installed on the rotating shaft. The driving wheel and the driven wheel have the same diameter, and the driving wheel and the driven wheel are connected by a transmission belt. The pitch of the reciprocating spiral groove is equal to the diameter of the diamond wire mother bar.

[0016] Furthermore, the driving unit includes a winding motor and a transmission member installed on a frame, wherein the input end of the transmission member is connected to the output shaft of the winding motor, and the output end of the transmission member is connected to the hollow drum through a transmission chain, and a transmission gear disk meshing with the transmission chain is provided on the hollow drum.

[0017] Furthermore, the transmission member includes a cover shell fixed on the frame, a first transmission shaft coaxially fixed with the winding motor output shaft is rotatably installed in the cover shell, a second transmission shaft vertically distributed with the first transmission shaft is also rotatably installed in the cover shell, a worm is installed on the first transmission shaft, and a worm wheel adapted to the worm is installed on the second transmission shaft; a transmission gear meshing with the transmission chain is installed on one end of the second transmission shaft extending out of the cover shell.

[0018] Furthermore, it also includes a tensioning unit, which includes an axial telescopic rod that movably passes through the hollow drum and extends into the winding drum, and a plurality of radial telescopic blocks that are circumferentially distributed on the winding drum, wherein the winding drum is provided with radial telescopic grooves that are slidably matched with the corresponding radial telescopic blocks, and a tensioning plate is installed at one end of the radial telescopic block that radially extends out of the winding drum;

[0019] An L-shaped swing rod corresponding to each radial telescopic block is arranged in the winding drum, the middle part of the L-shaped swing rod is rotatably connected to the winding drum, and the two ends of the L-shaped swing rod are rotatably connected to the first slider and the second slider respectively;

[0020] One end of the axial telescopic rod extending into the winding drum is provided with a first sliding groove slidably adapted to each first slider, and the first sliding groove extends radially; the radial telescopic block is provided with a second sliding groove slidably adapted to the second slider, and the second sliding groove extends axially.

[0021] Furthermore, the tensioning unit also includes an end cover fixed on the frame, a sealing disk is provided at the rotational connection between the end cover and the hollow drum, an air chamber is formed between the end cover and the sealing disk, a piston disk is movably installed in the air chamber, the piston disk divides the air chamber into a first chamber and a second chamber, the first chamber is connected to a first air pipe, and the second chamber is connected to a second air pipe; a sleeve shaft is fixed to the side of the piston disk facing the axial telescopic rod, and the sleeve shaft is rotationally connected to the axial telescopic rod.

[0022] Beneficial effects of the present invention:

[0023] During the rotating winding process of the winding drum in the present invention, the tightening unit continuously produces a reverse pulling effect on the diamond wire busbar at one end of the winding drum, so that the diamond wire busbar between the tightening unit and the winding unit can always be kept in a tensioned and straight state, thereby improving the tightness of the diamond wire busbar wound on the winding drum and avoiding the local looseness of the wound diamond wire busbar; at the same time, the diamond wire busbar is axially shifted by the shift fork, so that the diamond wire busbar can be circumferentially wound on the winding drum while being axially offset along the winding drum, so that the diamond wire busbar can be spirally reciprocated and wound on the winding drum layer by layer, effectively avoiding the local accumulation or uneven winding of the diamond wire busbar on the winding drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0026] Figure 2 A three-dimensional schematic diagram of another viewing angle of the present invention;

[0027] Figure 3It is a structural schematic diagram of the tightening unit, the wire-pulling unit and the guiding unit in the present invention;

[0028] Figure 4 It is a structural schematic diagram of the tightening unit in the present invention;

[0029] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0030] Figure 6 It is a structural schematic diagram of the dialing unit in the present invention;

[0031] Figure 7 A schematic structural diagram of the dialing unit in the present invention from another perspective;

[0032] Figure 8 It is a structural schematic diagram of the guiding unit in the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure of the winding unit and the driving unit in the present invention;

[0034] Fig.10 It is a structural schematic diagram of the transmission member in the present invention;

[0035] Fig.11 is a cross-sectional view of the tensioning unit in the present invention;

[0036] Fig.12 for Fig.11 Enlarged view of point B in the middle.

[0037] In the figure:

[0038] 100, machine base; 110, machine frame;

[0039] 200, winding unit; 210, mounting sleeve; 220, hollow drum; 221, driving wheel; 230, winding drum; 231, radial telescopic slot; 240, wire blocking rod;

[0040] 300, driving unit; 310, winding motor; 320, transmission member; 321, housing; 322, first transmission shaft; 323, worm; 324, second transmission shaft; 325, worm wheel; 326, transmission gear; 330, transmission chain; 340, transmission gear plate;

[0041] 400, tightening unit; 410, first base; 420, first support frame; 430, lower rotating roller; 440, upper rotating roller; 450, first driving motor; 460, pressing member; 461, sliding groove; 462, sliding block; 463, limiting sliding rod; 464, spring;

[0042] 500, wire-pulling unit; 510, mounting seat; 520, fixing plate; 530, guide rod; 540, slide plate; 550, shift fork; 551, wire-clamping groove; 560, rotating shaft; 561, driven wheel; 562, transmission belt; 570, reciprocating screw rod; 571, reciprocating spiral groove; 580, pin shaft; 590, crescent pin;

[0043] 600, guide unit; 610, second base; 620, second support frame; 630, lower guide roller; 631, lower spiral guide groove; 640, upper guide roller; 641, upper spiral guide groove; 650, second drive motor; 660, synchronous gear;

[0044] 700, tensioning unit; 710, axial telescopic rod; 711, first slide; 720, radial telescopic block; 721, second slide; 730, L-shaped swing rod; 731, first slider; 732, second slider; 740, tensioning plate; 750, end cover; 751, air chamber; 752, first air pipe; 753, second air pipe; 760, piston disc; 770, sleeve shaft; 780, sealing disc;

[0045] 800, Diamond wire busbar. DETAILED DESCRIPTION

[0046] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0047] See also Figure 1 , Figure 2 and Figure 3 The present invention discloses an automatic tensioning mechanism for taking up and paying out wires for preparing a diamond wire busbar, comprising a machine base 100, a winding unit 200, a driving unit 300, a tightening unit 400, and a wire dialing unit 500; a frame 110 is vertically fixed on the machine base 100;

[0048] See also Fig. 9 The winding unit 200 is rotatably mounted on the frame 110 and includes a winding drum 230 for winding the diamond wire busbar 800 and a plurality of wire blocking rods 240 circumferentially arranged on the winding drum 230;

[0049] The driving unit 300 is disposed on the frame 110 and is used to drive the winding unit 200;

[0050] See also Figure 4The tightening unit 400 is arranged on the machine base 100, and includes a first base 410 fixed on the machine base 100, a first support frame 420 fixed on the first base 410, and a lower rotating roller 430 and an upper rotating roller 440 rotatably mounted on the first support frame 420, a gap is provided between the lower rotating roller 430 and the upper rotating roller 440, and a first driving motor 450 for driving the lower rotating roller 430 is installed on one side of the first base 410;

[0051] See also Figure 6 and Figure 7 The wire-pulling unit 500 is arranged on the frame 110, and includes a mounting seat 510 fixed on the frame 110, a fixing plate 520 fixedly mounted on the mounting seat 510, a guide rod 530 horizontally mounted on the fixing plate 520, and a slide plate 540 slidably sleeved on the guide rod 530, a shift fork 550 extending into the gap is installed at the end of the slide plate 540, and a wire clamping groove 551 adapted to the diamond wire busbar 800 is opened on the shift fork 550; a reciprocating driving member for driving the slide plate 540 to reciprocate is also arranged on the frame 110.

[0052] It should be noted that the gap width between the lower rotating roller 430 and the upper rotating roller 440 is slightly smaller than the diameter of the diamond wire busbar 800. The specific ratio can be set according to the actual working conditions, as long as the diamond wire busbar 800 can be squeezed by the lower rotating roller 430 and the upper rotating roller 440 when passing through the gap, thereby generating friction on the diamond wire busbar 800.

[0053] Specifically, the diamond wire busbar 800 passes through the gap between the lower rotating roller 430 and the upper rotating roller 440 and is wound on the winding drum 230, and the driving unit 300 drives the winding drum 230 to rotate circumferentially, thereby pulling the diamond wire busbar 800, so that the diamond wire busbar 800 is continuously wound on the winding drum 230;

[0054] During the winding process of the winding drum 230, the first driving motor 450 drives the lower roller 430 to rotate in the opposite direction to the winding drum 230, and the diamond wire busbar 800 is subjected to the friction force generated by the squeezing effect of the lower roller 430 and the upper roller 440, and the direction of the friction force is opposite to the direction of the traction force of the winding drum 230 on the diamond wire busbar 800, thereby generating a reverse pulling effect on the diamond wire busbar 800 at one end of the winding drum 230, so that the diamond wire busbar 800 between the tightening unit 400 and the winding unit 200 can always maintain a tensioned and straight state, thereby ensuring the tightness of the diamond wire busbar 800 wound on the winding drum 230, and avoiding the phenomenon of partial looseness of the wound diamond wire busbar 800;

[0055] Insert the shift fork 550 horizontally into the gap between the lower rotating roller 430 and the upper rotating roller 440, and make the diamond wire busbar 800 just stuck in the wire clamping groove 551 of the shift fork 550; in the process of the tightening unit 400 continuously pulling the diamond wire busbar 800, the reciprocating drive member drives the slide plate 540 to slide back and forth along the guide rod 530, thereby driving the shift fork 550 to synchronously reciprocate and translate, and the shift fork 550 is used to continuously shift the diamond wire busbar 800 to one side along the axial direction of the lower rotating roller 430, so that the diamond wire busbar 800 can be circumferentially wound on the winding drum 230 while being able to deviate along the axial direction of the winding drum 230, Thereby, the diamond wire busbar 800 can be spirally wound on the winding drum 230. After the diamond wire busbar 800 is completely wound around the winding drum 230 in one circle, the reciprocating drive member drives the slide plate 540 to continue to move in the opposite direction, thereby driving the shift fork 550 to continuously shift the diamond wire busbar 800 toward the other side, thereby allowing the diamond wire busbar 800 to continue to be wound around the winding drum 230 in the next circle in the axial direction; this process is repeated until the diamond wire busbar 800 is tightly wound around the winding drum 230 layer by layer, thereby effectively avoiding local accumulation or uneven winding of the diamond wire busbar 800 on the winding drum 230.

[0056] In one embodiment, see Figure 4 and Figure 5 In order to enable the lower rotating roller 430 and the upper rotating roller 440 to exert sufficient frictional pulling effect on the diamond wire busbar 800, a pressing member 460 is provided on the first support frame 420, and the pressing member 460 includes a sliding groove 461 vertically opened on the first support frame 420 and a sliding block 462 slidably embedded in the sliding groove 461, and the two ends of the upper rotating roller 440 are rotatably installed on the corresponding sliding block 462, and a limiting slide bar 463 that movably passes through the first support frame 420 is vertically installed on the upper end of the sliding block 462, and a spring 464 that abuts against the sliding block 462 is provided in the sliding groove 461, and the spring 464 is movably sleeved on the limiting slide bar 463;

[0057] Specifically, the diamond wire busbar 800 is passed through the gap between the lower rotating roller 430 and the upper rotating roller 440. Under the elastic force of the spring 464, the sliding block 462 slides vertically along the sliding groove 461, thereby driving the upper rotating roller 440 to press down, and the diamond wire busbar 800 can be pressed tightly against the lower rotating roller 430, so that the squeezing friction force of the lower rotating roller 430 and the upper rotating roller 440 on the diamond wire busbar 800 is increased, thereby avoiding the reverse pulling effect on the diamond wire busbar 800 due to the squeezing force of the lower rotating roller 430 and the upper rotating roller 440 being too small.

[0058] For further information, see Figure 6 and Figure 7The reciprocating drive member includes a rotating shaft 560 rotatably mounted on the frame 110, a reciprocating screw rod 570 is coaxially fixed on the rotating shaft 560, a reciprocating spiral groove 571 is provided on the reciprocating screw rod 570, a pin shaft 580 is rotatably mounted on the slide plate 540, and a crescent pin 590 adapted to the reciprocating spiral groove 571 is connected to the pin shaft 580;

[0059] Specifically, the reciprocating screw 570 is driven to rotate by the rotating shaft 560, so that the crescent pin 590 moves reciprocatingly and spirally relative to the reciprocating screw 570 in the reciprocating spiral groove 571. When the crescent pin 590 moves relative to the reciprocating screw 570, the slide plate 540 is synchronously driven to slide back and forth along the guide rod 530, thereby driving the shift fork 550 to move axially along the lower rotating roller 430 to realize the reciprocating shifting function of the diamond wire busbar 800.

[0060] Furthermore, considering that the wire-releasing direction and angle of the wire-inlet end of the diamond wire busbar 800 (i.e., the end of the diamond wire busbar 800 away from the winding unit 200) are usually fixed, when the wire-pulling unit 500 pulls the diamond wire busbar 800 back and forth, if the wire-pulling end of the diamond wire busbar 800 is not adjusted accordingly, the wire-pulling end of the diamond wire busbar 800 will cause a reverse pulling effect on the diamond wire busbar 800 at the tightening unit 400, thereby increasing the resistance between the diamond wire busbar 800 and the shift fork 550 at the gap, affecting the smoothness of the reciprocating wire-pulling operation; for this purpose, please refer to Figure 8 , the base 100 is also provided with a guide unit 600, the guide unit 600 is located on the side of the tightening unit 400 away from the winding unit 200, the guide unit 600 includes a second base 610 fixed on the base 100, a second support frame 620 fixed on the second base 610, and a lower guide roller 630 and an upper guide roller 640 rotatably mounted on the second support frame 620, the lower guide roller 630 is provided with a lower spiral guide groove 631, the upper guide roller 640 is provided with an upper spiral guide groove 641, the lower spiral guide groove 631 and the upper spiral guide groove 641 have opposite rotation directions and are adapted to each other; a second driving motor 650 for driving the lower guide roller 630 is installed on one side of the second base 610, and the lower guide roller 630 and the upper guide roller 640 are both provided with mutually meshing synchronous gears 660;

[0061] Specifically, the lower spiral guide groove 631 on the lower guide roller 630 and the upper spiral guide groove 641 on the upper guide roller 640 are adapted to each other, so that a circular through-channel for accommodating the diamond wire busbar 800 and limiting the position of the diamond wire busbar 800 is formed between the lower spiral guide groove 631 and the upper spiral guide groove 641. When threading the diamond wire busbar 800, the diamond wire busbar 800 is horizontally passed through the circular through-channel aligned with the shift fork 550 and clamped in the wire clamping groove 551.

[0062] When the reciprocating drive member drives the shift fork 550 to shift the diamond wire busbar 800 at the gap to one side, the second drive motor 650 drives the lower guide roller 630 to rotate synchronously, and under the meshing transmission of the synchronous gear 660, the upper guide roller 640 is driven to rotate synchronously in the opposite direction, so that the corresponding circular through-channel accommodating the diamond wire busbar 800 is also synchronously offset to one side along the axial direction of the lower guide roller 630. Since the diamond wire busbar 800 is always confined in the circular through-channel, the diamond wire busbar 800 at the guide unit 600 can be synchronously guided in the same direction of movement of the shift fork 550. In this way, the axis of the diamond wire busbar 800 located between the guide unit 600 and the tightening unit 400 is always kept perpendicular to the axis of the lower rotating roller 430. Accordingly, the diamond wire busbar 800 will not be squeezed with one side of the shift fork 550 due to the pulling force at its wire inlet end, thereby avoiding the increase of resistance between the diamond wire busbar 800 and the shift fork 550 to affect the wire shifting operation.

[0063] It should be noted that, in actual application, it is necessary to control the rotation speed and direction of the second drive motor 650 so that the lateral movement rate of the corresponding circular through channel accommodating the diamond wire busbar 800 is consistent with the movement rate of the fork 550. Similarly, when the fork 550 moves to one end and then moves in the opposite direction again, the direction of the second drive motor 650 also needs to be switched accordingly, so that the movement direction of the corresponding circular through channel accommodating the diamond wire busbar 800 is also switched synchronously.

[0064] In yet another embodiment, see Fig. 9 The winding unit 200 further includes a mounting sleeve 210 fixed on the frame 110 and a hollow drum 220 rotatably mounted in the mounting sleeve 210, wherein the hollow drum 220 is coaxially fixedly connected to the winding drum 230;

[0065] The driving unit 300 drives the hollow drum 220 to rotate circumferentially relative to the mounting sleeve 210, thereby driving the winding drum 230 to rotate synchronously to achieve the winding of the diamond wire busbar 800;

[0066] Accordingly, see Figure 2 and Figure 7 In order to ensure the consistency of the movement of the reciprocating drive member and the winding drum 230, a driving wheel 221 is installed on the hollow drum 220, and a driven wheel 561 is installed on the rotating shaft 560. The driving wheel 221 and the driven wheel 561 have the same diameter, and the driving wheel 221 and the driven wheel 561 are connected by a transmission belt 562; the pitch of the reciprocating spiral groove 571 is equal to the diameter of the diamond wire busbar 800;

[0067] It is worth noting that when the hollow drum 220 and the winding drum 230 rotate and wind, the transmission belt 562 can drive the shaft 560 to rotate synchronously, and because the diameters of the driving wheel 221 and the driven wheel 561 are the same, the transmission ratio of the shaft 560 to the winding drum 230 is 1:1, that is, when the winding drum 230 rotates one circle, the diamond wire busbar 800 is correspondingly wound on the winding drum 230, and at the same time, the shaft 560 and the reciprocating screw rod 570 also rotate exactly one circle. The crescent pin 590 also moves a pitch distance along the axial direction of the reciprocating screw 570. Since the pitch of the reciprocating spiral groove 571 on the reciprocating screw 570 is equal to the diameter of the diamond wire busbar 800, the slide plate 540 and the shift fork 550 also move a distance equal to the diameter of the diamond wire busbar 800, so that the translational shift fork 550 is always aligned with the traction end of the spirally wound diamond wire busbar 800 on the winding drum 230, effectively improving the stability of the winding of the diamond wire busbar 800.

[0068] See also Fig. 9 The driving unit 300 includes a winding motor 310 and a transmission member 320 mounted on the frame 110. The input end of the transmission member 320 is connected to the output shaft of the winding motor 310. The output end of the transmission member 320 is connected to the hollow drum 220 through a transmission chain 330. The hollow drum 220 is provided with a transmission gear 340 meshing with the transmission chain 330.

[0069] For further information, see Fig.10 The transmission member 320 includes a cover 321 fixed on the frame 110, a first transmission shaft 322 coaxially fixed with the output shaft of the winding motor 310 is rotatably installed in the cover 321, a second transmission shaft 324 vertically distributed with the first transmission shaft 322 is also rotatably installed in the cover 321, a worm 323 is installed on the first transmission shaft 322, and a worm wheel 325 adapted to the worm 323 is installed on the second transmission shaft 324; a transmission gear 326 meshing with the transmission chain 330 is installed at one end of the second transmission shaft 324 extending out of the cover 321;

[0070] Specifically, the first transmission shaft 322 is driven to rotate by the winding motor 310, and the second transmission shaft 324 is driven to rotate under the meshing transmission of the worm 323 and the worm wheel 325, and then the hollow drum 220 is driven to rotate under the transmission of the transmission chain 330. Through the primary transmission of the worm 323 and the worm wheel 325 in the transmission member 320 and the secondary transmission of the transmission chain 330, the rotation speed of the hollow drum 220 can be effectively reduced, and the torque of the hollow drum 220 can be increased, thereby improving the traction and winding effect of the winding drum 230 on the diamond wire busbar 800, so that the diamond wire busbar 800 always remains in a straight state during the winding process, and the diamond wire busbar 800 is prevented from being partially loose.

[0071] In further embodiments, see Fig.11 and Fig.12 In order to further improve the winding tightness of the diamond wire busbar 800 on the winding drum 230, a tensioning unit 700 is also included. The tensioning unit 700 includes an axial telescopic rod 710 that movably penetrates the hollow rotating drum 220 and extends into the winding drum 230, and a plurality of radial telescopic blocks 720 that are circumferentially distributed on the winding drum 230. The winding drum 230 is provided with radial telescopic grooves 231 that are slidably matched with the corresponding radial telescopic blocks 720. A tensioning plate 740 is installed at one end of the radial telescopic block 720 that radially extends out of the winding drum 230;

[0072] The winding drum 230 is provided with an L-shaped swing rod 730 corresponding to each radial telescopic block 720 one by one, the middle of the L-shaped swing rod 730 is rotatably connected to the winding drum 230, and the two ends of the L-shaped swing rod 730 are rotatably connected to a first slider 731 and a second slider 732 respectively;

[0073] The end of the axial telescopic rod 710 extending into the winding drum 230 is provided with a first slide groove 711 slidably adapted to each first slider 731, and the first slide groove 711 extends radially; the radial telescopic block 720 is provided with a second slide groove 721 slidably adapted to the second slider 732, and the second slide groove 721 extends axially;

[0074] Specifically, the axial telescopic rod 710 is driven to move axially toward the winding drum 230, and the axial telescopic rod 710 can be used to push each L-shaped rocker 730 to rotate around its middle, and the first slider 731 also adaptively slides in the first slide groove 711, so that the end of the L-shaped rocker 730 connected to the radial telescopic block 720 expands radially outward, and the second slider 732 also adaptively slides in the second slide groove 721, thereby pushing the radial telescopic block 720 to slide radially outward along the corresponding radial telescopic groove 231 to drive the corresponding tensioning plate 740 to expand radially outward, so as to use the radially expanded tensioning plate 740 to expand the diamond wire busbar 800 wound on the periphery to avoid the gap between the diamond wire busbar 800 and the winding drum 230 being too large, causing the diamond wire busbar 800 to be too loose.

[0075] Furthermore, considering that the hollow drum 220 and the winding drum 230 are continuously rotating during the winding process, the axial telescopic rod 710 is also synchronously rotated. Therefore, it is necessary to perform axial drive for the continuously rotating axial telescopic rod 710 and perform a corresponding structural setting. For details, please refer to Fig.11The tensioning unit 700 further includes an end cover 750 fixed to the frame 110, a sealing disk 780 is provided at the rotation connection between the end cover 750 and the hollow drum 220, an air chamber 751 is formed between the end cover 750 and the sealing disk 780, a piston disk 760 is movably installed in the air chamber 751, and the piston disk 760 separates the air chamber 751 into a first chamber and a second chamber, the first chamber is connected to a first air pipe 752, and the second chamber is connected to a second air pipe 753; a sleeve shaft 770 is fixed to the side of the piston disk 760 facing the axial telescopic rod 710, and the sleeve shaft 770 is rotationally connected to the axial telescopic rod 710;

[0076] Air is blown into the first chamber through the first air pipe 752, so that the air pressure in the first chamber is greater than that in the second chamber. The piston plate 760 moves toward the side of the winding drum 230 under the action of the pressure difference, thereby axially pushing the axial telescopic rod 710 through the sleeve shaft 770, so that the axial telescopic rod 710 axially enters the winding drum 230, so as to realize the radial expansion of the tensioning plate 740 and improve the winding tension of the diamond wire busbar 800;

[0077] Similarly, air is blown into the second chamber through the second air pipe 753, so that the air pressure in the second chamber is greater than that in the first chamber. The piston disk 760 moves toward the side away from the winding drum 230 under the action of the pressure difference, thereby axially pulling the axial telescopic rod 710 through the sleeve shaft 770, causing the axial telescopic rod 710 to gradually axially withdraw from the winding drum 230, so as to achieve radial storage of the tensioning plate 740.

[0078] It should be noted that the sleeve shaft 770 is rotatably connected to the axial telescopic rod 710, so that the sleeve shaft 770 and the axial telescopic rod 710 can rotate freely in the circumferential direction without generating axial relative displacement. When the axial telescopic rod 710 rotates synchronously with the winding drum 230, the axial telescopic rod 710 and the sleeve shaft 770 also rotate relative to each other, but the axial thrust and pull effect of the sleeve shaft 770 on the axial telescopic rod 710 is not affected.

[0079] The specific implementation methods of this embodiment are described above, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms inspired by this embodiment, all of which are within the protection of this embodiment.

Claims

1. An automatic tensioning mechanism for retracting and releasing wires for preparing a diamond wire busbar, comprising a machine base and a frame vertically fixed on the machine base; characterized in that: Also includes: The winding unit is rotatably mounted on the frame and comprises a winding drum for winding the diamond wire busbar and a plurality of groups of wire blocking rods circumferentially arranged on the winding drum; A driving unit, which is arranged on the frame and is used to drive the winding unit; The tightening unit is arranged on the machine base, and comprises a first base fixed on the machine base, a first support frame fixed on the first base, and a lower rotating roller and an upper rotating roller rotatably mounted on the first support frame, a gap is provided between the lower rotating roller and the upper rotating roller, and a first driving motor for driving the lower rotating roller is installed on one side of the first base; The machine base is also provided with a guide unit, which is located on a side of the tightening unit away from the winding unit, and the guide unit includes a second base fixed on the machine base, a second support frame fixed on the second base, and a lower guide roller and an upper guide roller rotatably mounted on the second support frame, the lower guide roller is provided with a lower spiral guide groove, the upper guide roller is provided with an upper spiral guide groove, the lower spiral guide groove and the upper spiral guide groove have opposite rotation directions and are adapted to each other; a second driving motor for driving the lower guide roller is installed on one side of the second base, and the lower guide roller and the upper guide roller are both provided with mutually meshing synchronous gears; The wire shifting unit is arranged on a frame, and comprises a mounting base fixed on the frame, a fixing plate fixedly mounted on the mounting base, a guide rod horizontally mounted on the fixing plate, and a slide plate slidably sleeved on the guide rod, a shift fork extending into the gap is installed at the end of the slide plate, and a wire clamping groove adapted to the diamond wire busbar is provided on the shift fork; a reciprocating driving member for driving the slide plate to reciprocate is also arranged on the frame.

2. The automatic tensioning mechanism for retracting and releasing wires for preparing a diamond wire busbar according to claim 1, characterized in that: A clamping piece is provided on the first support frame, and the clamping piece includes a sliding groove vertically opened on the first support frame and a sliding block slidably embedded in the sliding groove. Both ends of the upper rotating roller are rotatably installed on the corresponding sliding blocks. A limiting sliding rod movably penetrating the first support frame is vertically installed on the upper end of the sliding block. A spring abutting against the sliding block is provided in the sliding groove, and the spring is movably sleeved on the limiting sliding rod.

3. The automatic tensioning mechanism for taking up and paying out wires for preparing a diamond wire busbar according to claim 1, characterized in that: The reciprocating drive member includes a rotating shaft rotatably mounted on a frame, a reciprocating screw rod is coaxially fixed on the rotating shaft, a reciprocating spiral groove is provided on the reciprocating screw rod, a pin shaft is rotatably mounted on the slide plate, and a crescent pin matching the reciprocating spiral groove is connected to the pin shaft.

4. The automatic tensioning mechanism for retracting and releasing wires for preparing a diamond wire busbar according to claim 3, characterized in that: The winding unit also includes a mounting sleeve fixed on the frame and a hollow rotating drum rotatably mounted in the mounting sleeve, and the hollow rotating drum is coaxially and fixedly connected with the winding drum.

5. The automatic tensioning mechanism for taking up and paying out wires for preparing a diamond wire busbar according to claim 4, characterized in that: A driving wheel is installed on the hollow drum, and a driven wheel is installed on the rotating shaft. The driving wheel and the driven wheel have the same diameter and are connected via a transmission belt. The pitch of the reciprocating spiral groove is equal to the diameter of the diamond wire mother bar.

6. The automatic tensioning mechanism for taking up and paying out wires for preparing a diamond wire busbar according to claim 5, characterized in that: The driving unit includes a winding motor and a transmission member installed on a frame, wherein an input end of the transmission member is connected to an output shaft of the winding motor, and an output end of the transmission member is connected to a hollow drum through a transmission chain, and a transmission gear disk meshing with the transmission chain is provided on the hollow drum.

7. The automatic tensioning mechanism for taking up and paying out wires for preparing a diamond wire busbar according to claim 6, characterized in that: The transmission member includes a cover shell fixed on the frame, a first transmission shaft coaxially fixed with the winding motor output shaft is rotatably installed in the cover shell, a second transmission shaft vertically distributed with the first transmission shaft is also rotatably installed in the cover shell, a worm is installed on the first transmission shaft, and a worm wheel adapted to the worm is installed on the second transmission shaft; a transmission gear meshing with the transmission chain is installed at one end of the second transmission shaft extending out of the cover shell.

8. The automatic tensioning mechanism for taking up and paying out wires for preparing a diamond wire busbar according to claim 4, characterized in that: It also includes a tensioning unit, which includes an axial telescopic rod that movably passes through the hollow drum and extends into the winding drum, and a plurality of radial telescopic blocks that are circumferentially distributed on the winding drum, wherein the winding drum is provided with radial telescopic grooves that are slidably matched with the corresponding radial telescopic blocks, and a tensioning plate is installed at one end of the radial telescopic block that radially extends out of the winding drum; An L-shaped swing rod corresponding to each radial telescopic block is arranged in the winding drum, the middle part of the L-shaped swing rod is rotatably connected to the winding drum, and the two ends of the L-shaped swing rod are rotatably connected to the first slider and the second slider respectively; One end of the axial telescopic rod extending into the winding drum is provided with a first sliding groove slidably adapted to each first slider, and the first sliding groove extends radially; the radial telescopic block is provided with a second sliding groove slidably adapted to the second slider, and the second sliding groove extends axially.

9. The automatic tensioning mechanism for taking up and paying out wires for preparing a diamond wire busbar according to claim 8, characterized in that: The tensioning unit also includes an end cover fixed on the frame, a sealing disk is provided at the rotational connection between the end cover and the hollow drum, an air chamber is formed between the end cover and the sealing disk, a piston disk is movably installed in the air chamber, the piston disk separates the air chamber into a first chamber and a second chamber, the first chamber is connected to a first air pipe, and the second chamber is connected to a second air pipe; a sleeve shaft is fixed to the side of the piston disk facing the axial telescopic rod, and the sleeve shaft is rotationally connected to the axial telescopic rod.

Images