Piezoelectric stopper for multi-station piezoelectric jacquard and multi-station selector

Abstract

The piezoelectric stop piece for the multi-station piezoelectric jack and the multi-station needle selector are used for limiting the guide needle when the corresponding guide needle is switched in the station. In the present application, by setting the piezoelectric stop piece in the piezoelectric jack, on the one hand, the piezoelectric stop piece is used to limit the guide needle when the guide needle is switched in the station, so that the guide needle can be more accurately switched to the predetermined station, on the other hand, the piezoelectric stop piece is used to drive the stop piece unit of the piezoelectric stop piece to swing together, the piezoelectric bending actuator is mature in the field of piezoelectric jack, stable in use, low in manufacturing cost, only the original piezoelectric ceramic part of the piezoelectric jack is used, the overall structure of the piezoelectric jack does not need to be changed, thereby the stability of the piezoelectric stop piece in work is improved, and the effect of killing two birds with one stone is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of piezoelectric jacks, in particular to a piezoelectric blocking piece for a multi-station piezoelectric jack and a multi-station needle selector. BACKGROUND

[0002] In the field of piezoelectric jacks, the guide needle swings left and right and is blocked by the comb teeth on the front of the base to limit the position. However, the existing comb teeth are machined on the front of the base, and the distance between the two comb teeth is fixed after production. For example, the Chinese utility model patent (application number: 202220316692.0, publication number: CN216919621U) discloses a piezoelectric jack long base of a warp knitting machine.

[0003] Because the position of the comb teeth is fixed, the guide needle stops swinging after being blocked by the comb teeth, and the position of the guide needle is also fixed. The distance between the two existing comb teeth is two needle pitches, so the guide needle is blocked by the comb teeth after swinging two needle pitches, thereby stopping swinging. Thus, the guide needle cannot only shift one needle position.

[0004] Therefore, the present application provides a piezoelectric blocking piece that limits the guide needle when switching stations, allowing the guide needle to switch stations more accurately in a swinging manner. SUMMARY

[0005] The present application provides a piezoelectric blocking piece for a multi-station piezoelectric jack and a multi-station needle selector, which overcomes the defect that the guide needle can only stop swinging at two different positions of the station and cannot stop swinging at other different positions of the station.

[0006] To solve the above technical problems, the present application adopts the following technical solutions:

[0007] The piezoelectric stop piece for the multi-station piezoelectric jack and the multi-station needle selector, the piezoelectric jack has a plurality of guide needles, the needle selector is used for limiting the guide needle when the corresponding guide needle switches the station, the needle selector includes a base, a plurality of piezoelectric stop pieces arranged on the base, and a plurality of stops arranged on the front of the base, a part of the piezoelectric stop piece extends into the middle space between the two stops corresponding to the piezoelectric stop piece, each guide needle is provided with at least one piezoelectric stop piece and at least one stop, the piezoelectric stop piece includes a piezoelectric bending actuator and a stop unit arranged on the front of the piezoelectric bending actuator, at least two conductive contacts are arranged on the tail of the piezoelectric bending actuator, the conductive contacts are electrically connected with the piezoelectric ceramic part of the piezoelectric bending actuator, when the conductive contacts input high level, the corresponding piezoelectric ceramic part is in the corresponding charging state, when the conductive contacts input low level, the corresponding piezoelectric ceramic part is in the corresponding grounding discharge state, so that the piezoelectric ceramic part drives the stop unit to swing.

[0008] Compared with the prior art, the present application has the following beneficial effects:

[0009] The present application has the advantages of simple structure and strong practicability. By arranging the piezoelectric stop piece in the piezoelectric jack, on the one hand, the piezoelectric stop piece is used to limit the guide needle when the guide needle switches the station, so that the guide needle can be more accurately switched to the predetermined station, on the other hand, the piezoelectric bending actuator drives the stop unit of the piezoelectric stop piece to swing together, the piezoelectric bending actuator is mature in the field of piezoelectric jack, stable in use and low in manufacturing cost, only the original piezoelectric ceramic part of the piezoelectric jack is used, without changing the overall structure of the piezoelectric jack, thereby improving the stability of the piezoelectric stop piece in work, achieving the effect of killing two birds with one stone. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is an exploded view of the piezoelectric stop piece.

[0011] Figure 2 It is a structural schematic view of the stop unit.

[0012] Figure 3 It is a structural schematic view of the piezoelectric stop piece. Figure 2 It is a structural schematic view of part A in the figure.

[0013] Figure 4 It is a structural schematic view of the piezoelectric stop piece.

[0014] Figure 5 It is a structural schematic view of the base.

[0015] Figure 6 It is a structural schematic view of part B in the figure. Figure 5 It is a structural schematic view of part B in the figure.

[0016] Figure 7 Structure diagram of piezoelectric jacks.

[0017] Figure 8 Structure diagram of piezoelectric jacks. Figure 7 Structure diagram of piezoelectric jacks. Embodiment

[0018] The specific embodiments of the present application will be described below with reference to the accompanying drawings.

[0019] Embodiment 1, with reference to Figure 4 and Figure 5 , the piezoelectric stopper for multi-station piezoelectric jacks and the needle selector for multi-station piezoelectric jacks, the needle selector is used in the piezoelectric jacks 401 with a plurality of guide needles 15, and is used for limiting the guide needles 15 when the corresponding guide needles 15 are switched in the station.

[0020] With reference to Figure 1 , Figure 4 , Figure 5 and Figure 8 , the needle selector includes a base 500, a plurality of piezoelectric stoppers 400 arranged on the base 500, and a plurality of stops 24 arranged on the front of the base 500, a part of the piezoelectric stopper 400 extends into the middle space 26 between the two stops 24 corresponding to the piezoelectric stopper 400, and each guide needle 15 is provided with at least one piezoelectric stopper 400 and at least one stop 24. The distance between the two stops 24 is at least one needle position.

[0021] With reference to Figure 1 and Figure 4 , the piezoelectric stopper 400 includes a piezoelectric bending actuator 403 and a stopper unit 402 arranged on the front of the piezoelectric bending actuator 403, and at least two conductive contacts 404 are arranged on the tail of the piezoelectric bending actuator 403, the conductive contacts 404 are electrically connected with the piezoelectric ceramic part 405 of the piezoelectric bending actuator 403, and when the conductive contacts 404 are powered, the piezoelectric ceramic part 405 drives the stopper unit 402 to swing.

[0022] With reference to Figure 1 and Figure 4 , in this embodiment, specifically when the conductive contacts 404 input high level, the corresponding piezoelectric ceramic part 405 is in the corresponding charging state, when the conductive contacts 404 input low level, the corresponding piezoelectric ceramic part 405 is in the corresponding grounding discharge state, which can be manifested as the piezoelectric ceramic part 405 swings, when the piezoelectric ceramic part 405 is in the corresponding reset state, which can be manifested as the piezoelectric ceramic part 405 does not swing or the piezoelectric ceramic part 405 can be reset to the original position after the swing state ends, so that the piezoelectric ceramic part 405 drives the stopper unit 402 to swing.

[0023] Referring to Figure 4 and Figure 7 , the piezoelectric stopper 400 is configured on the piezoelectric jack 401, when the guide needle 15 abuts against a portion of the stopper unit 402, the stopper unit 402 is used to limit the displacement of the guide needle 15 along the moving direction, when the piezoelectric ceramic portion 405 drives the stopper unit 402 to swing, a portion of the stopper unit 402 is limited on the bottom base 500 portion of the piezoelectric jack 401.

[0024] Referring to Figure 1 and Figure 4 , the stopper unit 402 comprises a body portion 430 and a protruding portion 431, the body portion 430 and the protruding portion 431 are connected together to form an integral whole, the protruding portion 431 protrudes transversely to the moving direction of the body portion 430, a portion of the body portion 430 is used to limit the guide needle 15, when the protruding portion 431 is limited on a portion of the piezoelectric jack 401, the body portion 430 stops swinging.

[0025] Referring to Figure 1 and Figure 4 , when the conductive contact 404 is energized, the piezoelectric ceramic portion 405 drives the body portion 430 and the protruding portion 431 to swing together, so that the protruding portion 431 switches between the first position and the second position.

[0026] Referring to Figure 4 , the body portion 430 and the protruding portion 431 are connected together to form an integral whole by machining or one-piece casting.

[0027] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the body portion 430 comprises a first outer sheet 410, a second outer sheet 412 and an inner sheet sandwiched between the first outer sheet 410 and the second outer sheet 412, the tail of the first outer sheet 410, the tail of the inner sheet and the tail of the second outer sheet 412 surround to form a cavity 421, the front portion of the piezoelectric ceramic portion 405 is assembled in the cavity 421, the piezoelectric ceramic portion 405 and the cavity 421 are filled with structural glue, the structural glue has viscosity.

[0028] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the first outer sheet 410, the second outer sheet 412 and the inner sheet are connected together to form a complete whole by welding after being stacked together.

[0029] Referring to Figure 1 , Figure 2 , Figure 3and Figure 4 The piezoelectric bending brake 403 comprises an insulating base plate 422, two piezoelectric ceramic sheets respectively wrapped on both sides of the base plate 422, and conductive contacts 404 arranged on the tail of the piezoelectric ceramic sheets to realize electrical connection. The base plate 422 is made of glass fiber steel sheet material. The glass fiber sheet is also called glass fiber steel sheet. The glass fiber sheet is a product made by pre-impregnating glass fiber yarn with phenylacrylic polyester resin and then curing and pultrusion by heating. It can also be called glass fiber sheet and glass fiber sheet plate. The two piezoelectric ceramic sheets arranged on both sides of the base plate 422 form a piezoelectric ceramic part 405.

[0030] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the thickness of the first outer sheet 410 is 0.1-1.5mm, the thickness of the second outer sheet 412 is 0.1-1.5mm, and the thickness of the inner sheet 411 is 0.1-1.5mm.

[0031] Referring to Figure 1 , Figure 4 , Figure 1 and Figure 4 , the length of the inner sheet 411 is less than the length of the first outer sheet 410, and the length of the inner sheet 411 is less than the length of the second outer sheet 412.

[0032] Referring to Figure 4 and Figure 5 , the body part 430 has at least one stopper 432 configured in the swing space of the guide needle 15 part and used to limit the guide needle 15 part.

[0033] Referring to Figure 6 and Figure 7 , the stopper unit 402 further comprises at least one first positioning hole 441, at least one second positioning hole 442, and at least one third positioning hole 443. The first positioning hole 441 is arranged on the first outer sheet 410, the second positioning hole 442 is arranged on the inner sheet 411, and the third positioning hole 443 is arranged on the second outer sheet 412. After the first outer sheet 410, the second outer sheet 412 and the inner sheet 411 are stacked together, the first positioning hole 441, the second positioning hole 442 and the third positioning hole 443 are all stacked together one by one to form a through hole 413 that penetrates each other.

[0034] Referring to Figure 1 , Figure 5 , Figure 6 and Figure 7, by setting the piezoelectric blocking piece 400 in the piezoelectric jacking 401, on the one hand, the piezoelectric blocking piece 400 is used to limit the guide needle 15 when the guide needle 15 switching station, so that the guide needle 15 can be more accurate to switch to the predetermined station, on the other hand, the piezoelectric bending actuator 403 drives the piezoelectric blocking piece unit 402 to swing together, the piezoelectric bending actuator 403 is mature in the field of piezoelectric jacking, stable use, low manufacturing cost, only need to use the original piezoelectric ceramic part 405 of the piezoelectric jacking 401 can be realized, without changing the overall structure of the piezoelectric jacking 401, thereby improving the stability of the piezoelectric blocking piece 400 in work, and achieving a hit two effects.

[0035] Embodiment two, refer to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the difference between this embodiment two and embodiment two is that the piezoelectric jacking 401 can be applied in textile machinery, which can be a warp knitting machine, specifically a double needle bed warp knitting machine, the textile machinery has at least one piezoelectric jacking 401, the piezoelectric jacking 401 includes at least one base 500, a plurality of first piezoelectric jacking elements 13, a plurality of piezoelectric blocking pieces 400, the first piezoelectric jacking element 13 includes a guide needle 15 and a second piezoelectric ceramic part 16, the second piezoelectric ceramic part 16 is used to drive the guide needle 15 to swing. The guide needle 15 is provided on the front of the second piezoelectric ceramic part 16. The base 500 is made of aluminum alloy material, magnesium alloy material, aluminum magnesium alloy material, carbon fiber material or resin material.

[0036] Refer to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the first piezoelectric jacking element 13 and the piezoelectric blocking piece 400 are arranged transversely on the same side of the base 500 and constitute a single layer structure, one corresponding piezoelectric blocking piece 400 is arranged in the transverse direction of each first piezoelectric jacking element 13, the transverse direction is the swing direction of the guide needle 15, and one corresponding blocking piece unit 402 is arranged in the swing direction of each guide needle 15. The blocking piece unit 402 is made of stainless steel material.

[0037] Refer to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the piezoelectric blocking piece 400 has a blocking piece unit 402, each blocking piece unit 402 is matched with an adjacent guide needle 15, and the piezoelectric bending actuator 403 is used to actuate the blocking piece unit 402 to switch between the first position and the second position.

[0038] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the piezoelectric stopper 400 in this embodiment includes a piezoelectric bending brake 403 and a stopper unit 402 arranged on the front of the piezoelectric bending brake 403, and the piezoelectric bending brake 403 is used to drive the corresponding stopper unit 402 to swing independently.

[0039] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the base 500 is provided with a plurality of mounting grooves 12 arranged in an array, and the second piezoelectric ceramic part 16 is arranged in the corresponding mounting groove 12, and the piezoelectric bending brake 403 is arranged in the corresponding mounting groove 12. The number of mounting grooves 12 can be the sum of the total number of first piezoelectric jack elements 13 and piezoelectric stoppers 400.

[0040] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , when the guide needle 15 is not offset, the corresponding stopper unit 402 does not limit the guide needle 15, when the stopper unit 402 limits the corresponding guide needle 15 to the first position, the corresponding guide needle 15 is offset by one needle pitch, and when the stopper unit 402 limits the corresponding guide needle 15 to the second position, the corresponding guide needle 15 is offset by two needle pitches.

[0041] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the moment generated when the piezoelectric stopper 400 swings is greater than the moment generated when the first piezoelectric jack element 13 swings.

[0042] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , when the guide needle 15 is not offset, the corresponding stopper unit 402 is at least one needle pitch away from the corresponding guide needle 15.

[0043] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7, the guide needle 15 has a first station 21, a second station 22 and a third station 23, wherein when the guide needle 15 is offset by at least one needle pitch and the stopper unit 402 is in the first position, the stopper unit 402 limits the guide needle 15 in the second station 22, the second station 22 is between the first station 21 and the third station 23, the first station 21 is away from the second station 22 by one needle pitch, the third station 23 is away from the second station 22 by one needle pitch, and the first station 21 is away from the third station 23 by two needle pitches. When the guide needle 15 is not offset, the guide needle 15 is in the first station 21, when the guide needle 15 is offset by one needle pitch, the guide needle 15 is in the second station 22, and when the guide needle 15 is offset by two needle pitches, the guide needle 15 is in the third station 23.

[0044] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , a plurality of stops 24 are arranged in a transverse row on the foremost part of the base 500, each stopper unit 402 is provided with two stops 24, the stops 24 limit the displacement of a part of the stopper unit 402 in the moving direction, the stops 24 are arranged outside the swing space 30 of the stopper unit 402 in a staggered manner transverse to the moving direction, each stopper unit 402 has at least one protruding part 431 protruding transverse to the moving direction and extending into the intermediate space 26 between the two stops 24 belonging to the stopper unit 402. The width of the intermediate space 26 is one needle pitch.

[0045] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the core function of the three-station piezoelectric Jacquard is that in addition to the need for the guide needle 15 to swing left and right, it can also be accurately parked in the second station 22, and each guide needle 15 swings independently, and each different guide needle 15 can be in a different station at the same time, rather than entering the same station at the same time.

[0046] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7, by setting the torque of the piezoelectric blocking piece 400 greater than the torque of the first piezoelectric jack element 13, so that the blocking piece unit 402 can effectively push the corresponding guide needle 15 to move from the second position to the first position, that is, from the third station 23 to the second station 22, thereby stably achieving the blocking of the guide needle 15 by the blocking piece unit 402, and stably switching the guide needle 15 between the first position and the second position.

[0047] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , when the starting moving position of the guide needle 15 is in the second position, the blocking piece unit 402 pushes the guide needle 15 to move from the second position to the first position, thereby achieving the effect of switching the guide needle 15 from the third station 23 to the second station 22.

[0048] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , by setting the piezoelectric blocking piece 400 to drive the corresponding blocking piece unit 402 to swing, on the one hand, each blocking piece unit 402 can be independently switched between the first position and the second position, so that each corresponding guide needle 15 can be individually entered into the second station 22 or the third station 23, thereby effectively achieving the technical requirement of three stations, on the other hand, the piezoelectric blocking piece 400 has simple structure and is easy to control, which reduces the overall technical difficulty of the piezoelectric jack and improves the stability of the blocking piece unit 402 after switching between the first position and the second position to block the guide needle 15, thereby achieving a two-in-one effect.

[0049] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , in this embodiment, the torque of the specific blocking piece unit 402 is greater than the torque of the first piezoelectric jack element 13, by setting the torque of the blocking piece unit 402 greater than the torque of the first piezoelectric jack element 13, on the one hand, the pushing force provided by the blocking piece unit 402 is greater than the swinging force of the guide needle 15 in the first piezoelectric jack element 13, thereby effectively supporting the guide needle 15, so that the guide needle 15 stops swinging after being blocked by the blocking piece unit 402, thereby effectively limiting the switching of the guide needle 15 between the second station 22 and the third station 23, on the other hand, the guide needle 15 is prevented from colliding with the blocking of the blocking piece unit 402, thereby preventing the needle deviation, thereby achieving a two-in-one effect.

[0050] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , taking 8 piezoelectric stoppers 400 and 8 first piezoelectric jack elements 13 as an example, wherein the arrangement order is piezoelectric stopper 400 / first piezoelectric jack element 13 / piezoelectric stopper 400 / first piezoelectric jack element 13 / piezoelectric stopper 400 / first piezoelectric jack element 13 / piezoelectric stopper 400 / first piezoelectric jack element 13 / piezoelectric stopper 400 / first piezoelectric jack element 13 / piezoelectric stopper 400 / first piezoelectric jack element 13 / piezoelectric stopper 400 / first piezoelectric jack element 13, and the transverse arrangement forms a single-layer structure.

[0051] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , by arranging the first piezoelectric jack elements 13 and the piezoelectric stoppers 400 on the same side of the bottom base 500 in a transverse arrangement and forming a single-layer structure, only the piezoelectric jack elements of the single-layer structure need to be arranged, so that the yarn guide needle 15 can be stopped at three different stations, and the piezoelectric jack with three stations has the same thickness as the original two-station piezoelectric jack.

[0052] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , in this embodiment, the total number of the yarn guide needles 15, the total number of the first piezoelectric jack elements 13, the total number of the piezoelectric stoppers 400, and the total number of the stopper units 402 are all the same and one-to-one corresponding and mutually adaptive. When the first piezoelectric jack elements 13 on one bottom base 500 are 8, the corresponding yarn guide needles 15 are 8, the piezoelectric stoppers 400 are 8, and the stopper units 402 are 8. When the first piezoelectric jack elements 13 on one bottom base 500 are 16, the corresponding yarn guide needles 15 are 16, the piezoelectric stoppers 400 are 16, and the stopper units 402 are 16. Of course, more yarn guide needles 15 can be arranged, including but not limited to 16 or 8. More yarn guide needles 15 can be similarly arranged, and details are not repeated.

[0053] The other structures are similar to those of Embodiment Two, and details are not repeated.

[0054] Embodiment Three, referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7The difference between this embodiment three and embodiment two is that the protruding part 431 extends into the middle space 26 from top to bottom. Each stopper 24 is held on the frontmost part of the bottom base 500 at at least two different heights.

[0055] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the middle space 26 is configured as a groove 27 arranged on the frontmost part of the bottom base 500.

[0056] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the stopper 24 comprises a comb tooth part 31 and a stopper block 28 arranged on one side of the comb tooth part 31, the stopper block 28 is adapted to an adjacent stopper unit 402, and among these stoppers 24, the middle space 26 is clamped between one stopper block 28 and another adjacent comb tooth part 31.

[0057] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , a cavity is arranged between the two comb tooth parts 31, a part of the guide needle 15 is arranged in the cavity, the cavity is a swing space 30 for the part of the guide needle 15, the stopper block 28 is below the swing space 30, the middle space 26 is below and communicates with the swing space 30, and the width of the cavity is two needle pitches. The head of the guide needle 15 extends out of the cavity, and a guide hole 32 is arranged on the head of the guide needle 15.

[0058] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , when the stopper unit 402 swings to the opposite side of the comb tooth part 31 (the opposite side is the side away from the comb tooth part 31), the stopper unit 402 is blocked by the adjacent other comb tooth part 31, so that the stopper unit 402 stops swinging at the second position, and at this time, the stopper unit 402 is used to block the guide needle 15 from stopping swinging at the third station 23.

[0059] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7, by setting the guide bar tooth part 31 and the stopper 28, the guide bar tooth part 31 is used to block the stopper unit 402 so that the stopper unit 402 stops at the second position after swinging, to accurately realize the effect of switching the stopper unit 402 to the second position, and the stopper 28 is used to block the protruding part 431 of the stopper unit 402, so that the stopper unit 402 stops swinging at the first position after swinging, to realize the effect of switching the stopper unit 402 from the first position to the second position.

[0060] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , when the stopper unit 402 is limited to stop swinging at the first position because of the stopper 28, the corresponding guide needle 15 is stopped swinging at the second station 22 using the stopper unit 402, and when the stopper unit 402 is limited to stop swinging at the second position because of the guide bar tooth part 31, or the stopper unit 402 is used to block the guide needle 15 to stop swinging at the third station 23, so that the guide needle 15 can stop swinging at three different stations respectively after being blocked by the corresponding stopper unit 402, thereby realizing the effect that the guide needle 15 can switch back and forth among the three stations.

[0061] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , in the embodiment, the other side of the specific guide bar tooth part 31 is used to limit the adjacent stopper unit 402 to the second position.

[0062] The working principle of the piezoelectric jacquard realizing three stations in the embodiment is as follows:

[0063] The swing amplitude of the existing double-station piezoelectric jacquard is one slot needle position, and the swing amplitude of the three-station piezoelectric jacquard is two slot needle positions (two needle pitches) due to the increase of one station state, that is, without horizontal movement, the swing amplitude is two slot needle positions (two needle pitches).

[0064] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the three-station piezoelectric jacquard refers to the guide needle 15 which can swing left and right and also can accurately stop at the middle position (i.e. the second station 22 position), and the stopper unit 402 corresponds to the first position.

[0065] With reference to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7, the double-station piezoelectric jacquard can only swing left and right, and the position of the stop is fixed and accurate. The reason for this is that the comb-tooth part 31 of the base 500 is toothed according to calculated data, and the needle 15 swings left or right and stops on the tooth wall. Since the spacing of the tooth wall is calculated, as long as the spacing of the tooth wall is correct, the needle position is correct. The piezoelectric ceramic sheet generates a swing force distance after being charged. A complete piezoelectric ceramic sheet that can swing left and right is composed of two single piezoelectric ceramic sheets bonded on a glass fiber sheet. Each single piezoelectric ceramic sheet is responsible for one swing direction, i.e. one is charged and the other is discharged, which generates the correct swing force distance, and the piezoelectric ceramic sheet swings left or right. This is the basic swing principle of the piezoelectric ceramic sheet.

[0066] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , as long as a large enough force distance is generated, the guide needle 15 will be pressed tightly against the wall on one side of the comb-tooth part 31 under the action of the second piezoelectric ceramic part 16, and will not be deflected by the yarn, and can accurately pass through the center of the two grooved needles.

[0067] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the width of the groove 27 is the width of one needle pitch, the width of the swing space 30 is the width of two needle pitches, and there is a stop block 28 between the groove 27 and the swing space 30. The stop block 28 can have a step or triangular shape.

[0068] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the second piezoelectric ceramic part 16 drives the guide needle 15 to swing in the swing space 30. The position of the guide needle 15 is higher than the stop block 28, so it is not affected by the stop block 28. Since the width of the swing space 30 is the width of two needle pitches, the guide needle 15 driven by the second piezoelectric ceramic part 16 can swing in the swing space 30 to a position of two needle pitches.

[0069] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7, after the piezoelectric bending brake 403 is set, when the piezoelectric bending brake 403 drives the blocking piece unit 402 at the front end to move, because the bottom of the blocking piece unit 402 (which can be a protruding block part) is lower than the blocking block 28, it can fall into the groove 27 (that is, into the intermediate space 26), when the blocking piece unit 402 is in the first position or the second position, it will be blocked by the blocking block 28 or the comb tooth part 31 respectively, so the upper part of the blocking piece unit 402 is limited to only swing left and right in the swing space 30, and because the intermediate space 26 is set to a width of one needle pitch, the blocking piece unit 402 can swing left and right by one needle pitch due to the blocking of the blocking block 28 or the comb tooth part 31. Because the blocking block 28 limits the blocking piece unit 402, the blocking piece unit 402 can only switch between the first position and the second position, that is, swing between the blocking block 28 and the comb tooth.

[0070] The following explains how the three-station piezoelectric jacquard works in the three stations and switches between the three stations, respectively described as the first station, the first position, and the second position:

[0071] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 , and Figure 7 , when the guide needle 15 is in the first station 21: the needle position of the guide needle 15 is in the first station 21. At this time, the blocking piece unit 402 can be in any position, which can be the first position or the second position, and has no effect on the current first station 21.

[0072] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 , and Figure 7 , when the blocking piece unit 402 switches to the first position: the second drive circuit controls the piezoelectric bending brake 403 to make the blocking piece unit 402 switch from the second position to the first position, and at the same time, controls the second piezoelectric ceramic part 16 to drive the guide needle 15 to swing towards the blocking piece unit 402, at this time the blocking piece unit 402 will be blocked by the blocking block 28. And because the moment of force of the blocking piece unit 402 is greater than that of the guide needle 15, the guide needle 15 will press tightly on the blocking piece unit 402 at this time, and will not push the blocking piece unit 402 away to cause needle deviation, so the final result is that the blocking piece unit 402 is blocked by the blocking block 28 and stops, the guide needle 15 presses on the blocking piece unit 402, and the blocking piece unit 402 stops at the first position (that is, the blocking piece unit 402 stops at the first position after being blocked by the blocking block 28), which is exactly one needle pitch away (that is, the position of the second station 22), which is equivalent to the guide needle 15 being in the second station 22 at this time.

[0073] Referring to Figure 8 ,Figure 1 、 Figure 5 、 Figure 6 and Figure 7 When the stopper unit 402 is switched to the second position, the driving circuit controls the second piezoelectric ceramic portion 16 to swing so that the guide needle 15 swings towards the third station 23, and controls the stopper unit 402 in front of the piezoelectric bending brake 403 to swing to the second position. The guide needle 15 is in the third station 23, and the guide needle 15 is pressed on the stopper unit 402. Because the width is set in advance during the process of milling the groove of the original gill tooth portion 31, the position of the guide needle 15 pressed on the stopper unit 402 is just two needle pitches including the thickness of the stopper unit 402. Therefore, the guide needle 15 is in the third station 23.

[0074] The other structures are similar to those of the second embodiment, and will not be described here.

[0075] Embodiment Four, referring to Figure 8 、 Figure 1 、 Figure 5 、 Figure 6 and Figure 7 The difference between this embodiment four and the third embodiment is that the stopper unit 402 comprises a body portion 430 and a protruding portion 431. A part of the protruding portion 431 is arranged on the bottom of the body portion 430, and another part of the protruding portion 431 extends into the intermediate space 26. The tail of the body portion 430 is connected with the piezoelectric bending brake 403, so that when the piezoelectric bending brake 403 swings, the piezoelectric bending brake 403 drives at least a part of the body portion 430 to switch between the first position and the second position. Another part of the body portion 430 is used to block the guide needle 15 in the first position or the second position. The body portion 430 is made of stainless steel, and the protruding portion 431 is made of stainless steel.

[0076] The other structures are similar to those of the third embodiment, and will not be described here.

[0077] Embodiment Five, referring to Figure 8 、 Figure 1 、 Figure 5 、 Figure 6 and Figure 7The difference between the fifth embodiment and the second embodiment is that the piezoelectric jacquard 401 further comprises at least one jacquard driver 41 arranged on the rear of the base 500. When the piezoelectric jacquard is a wireless jacquard, the jacquard driver 41 comprises an electrically conductive connector 42 and a driving circuit board 43 integrated with the connector 42. The output end of the driving circuit board 43 is electrically connected with the input end of the connector 42. The electrically connecting end of the first piezoelectric jacquard element 13 and the electrically connecting end of the piezoelectric blocking piece 400 are arranged on the output end of the connector 42 respectively. The jacquard driver 41 is used to drive the first piezoelectric jacquard element 13 and the piezoelectric blocking piece 400 to swing independently.

[0078] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the first piezoelectric jacquard element 13 comprises at least one deformable first base plate 46, at least one gripper arranged on the front of the first base plate 46, the second piezoelectric ceramic part 16 arranged on both sides of the first base plate 46, and two first electrically connecting ends 47 arranged on both sides of the tail of the first base plate 46. The first base plate 46 can be a glass fiber plate. The guide needle 15 is arranged on the front of the gripper.

[0079] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the blocking piece unit 402 can have a reverse L shape, a reverse "convex" shape, or a reverse triangular shape. The first electrically connecting end 47 and the conductive contact 404 can be conductive copper sheets.

[0080] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , in this embodiment, the specific connector 42 is electrically connected with the second piezoelectric ceramic part 16 through the first electrically connecting end 47, and the connector 42 is electrically connected with the piezoelectric bending brake 403 through the second electrically connecting end.

[0081] The other structures are similar to those of the second embodiment, and will not be described here.

[0082] In the sixth embodiment, the piezoelectric jack further comprises at least one jack driver arranged on the rear of the base, when the piezoelectric jack is a wired jack, the jack driver comprises a conductive connector, at least one cable and a driving circuit board, the driving circuit board is electrically connected to the input end of the connector through the cable, the electrically connected end of the first piezoelectric jack element and the electrically connected end of the second piezoelectric jack element are arranged on the output end of the connector respectively, and the jack driver is used to drive the first piezoelectric jack element and the second piezoelectric jack element to swing independently.

[0083] The other structures are similar to those of the second embodiment, and thus are not described herein.

[0084] In the seventh embodiment, referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , when the piezoelectric jack is a wireless jack, the jack driver 41 comprises a connector 42, at least one driving circuit board 43 with a first driving circuit, a plurality of first electrically connected ports 48 arranged on the driving circuit board 43 and a plurality of second electrically connected ports 49 arranged on the driving circuit board 43, the output end of the driving circuit board 43 is electrically connected to the first electrically connected end 47 of the first piezoelectric jack element 13 in a coupling manner, the first electrically connected ports 48 are used to transmit electric signals, the output end of the second driving circuit board 43 is electrically connected to the second electrically connected end of the piezoelectric bending brake 403 in a coupling manner, and the second electrically connected ports 49 are used to transmit electric signals.

[0085] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the driving circuit board 43 comprises a printed circuit board and a first driving circuit arranged on the printed circuit board and a second driving circuit arranged on the printed circuit board, the first driving circuit is used to drive the second piezoelectric ceramic part 16 of the first piezoelectric jack element 13 to swing, and the first electrically connected ports 48 can be arranged on the right side of the printed circuit board respectively.

[0086] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , the second driving circuit is used to drive the piezoelectric bending brake 403 of the piezoelectric stopper 400 to swing. The second electrically connected ports 49 can be arranged on the left side of the second printed circuit board.

[0087] Referring to Figure 8 , Figure 1 , Figure 5 ,Figure 6 And Figure 7 In this embodiment, a connector 42 can be provided on the front of the printed circuit board, so that the output end of the drive circuit board 43 is electrically connected to the first electrical connection end 47 of the first piezoelectric jack element 13 in a plug-in manner through the connector 42.

[0088] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 And Figure 7 In this embodiment, a connector 42 can be provided on the front of the printed circuit board, so that the output end of the second drive circuit board 43 is electrically connected to the second electrical connection end of the piezoelectric bending brake 403 in a plug-in manner through the connector 42.

[0089] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 And Figure 7 The second electrical connection port 49 and the first electrical connection port 48 are respectively arranged on the left and right sides of the printed circuit board to achieve the effect of taking power from the side of the drive circuit board 43.

[0090] The circuit structure of the first drive circuit can refer to the Chinese utility model patent (application number: 202123378011.8, publication number: CN218124570U), or other piezoelectric ceramic drive circuits in the art. The second drive circuit can refer to the Chinese utility model patent (application number: 202121926084.3, publication number: CN217486404U), or other piezoelectric ceramic drive circuits in the art.

[0091] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 And Figure 7 In another embodiment, the second electrical connection port 49 and the first electrical connection port 48 can be replaced by a plurality of conductive spring pins. The spring pins are arranged below the drive circuit board and are electrically connected to the drive circuit board, thereby achieving the effect of taking power from the bottom. The spring pins can also be called pins.

[0092] Other structures are similar to embodiment two, and will not be described here.

[0093] Embodiment eight, referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 And Figure 7The difference between this embodiment eight and embodiment two is that the working process of the piezoelectric jacquard: the second piezoelectric ceramic part 16 of the first piezoelectric jacquard element 13 drives the guide needle 15 to swing left and right after being powered on, so that the guide needle 15 switches positions back and forth between the first station 21, the second station 22 and the third station 23, the distance between the first station 21 and the third station 23 is two needle pitches, the distance between the third station 23 and the second station 22 is one needle pitch, the first station 21 is the first needle position of the guide needle 15, the third station 23 is the last needle position of the guide needle 15, and the second station 22 is located between the first station 21 and the third station 23. The piezoelectric bending brake 403 of the piezoelectric blocking piece 400 drives the blocking piece unit 402 to switch between the first position and the second position in a swinging manner after being powered on.

[0094] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , when the blocking piece unit 402 restricts the corresponding guide needle 15 in the second position, the corresponding guide needle 15 is offset by two needle pitches, and at this time the guide needle 15 stops swinging in the third station 23.

[0095] Referring to Figure 8 , Figure 1 , Figure 5 , Figure 6 and Figure 7 , when the blocking piece unit 402 switches from the second position to the first position, the blocking piece unit 402 is configured to apply a pushing force to the guide needle 15, so that the guide needle 15 is restricted in the first position to stop swinging, at this time the guide needle 15 stops swinging in the second station 22, in an embodiment, the protruding part 431 can be limited by the stop block 28, so that the blocking piece unit 402 stops swinging in the first position, and a part of the guide needle 15 is in contact with the body part 430, the body part 430 pushes the guide needle 15, so that the guide needle 15 is limited in the first position, more specifically, assuming that initially the blocking piece unit 402 is in the second position, the guide needle 15 is also swung to the second position and abuts against the body part 430 of the blocking piece unit 402, because the torque of the piezoelectric blocking piece 400 is greater than the torque of the first piezoelectric jacquard element 13, the blocking piece unit 402 is driven by the piezoelectric blocking piece 400 to swing to the first position, in this swinging process, the guide needle 15 is pushed by the blocking piece unit 402 at the same time, so that the guide needle 15 switches from the second position to the first position together with the blocking piece unit 402, thereby realizing the effect of switching the guide needle 15 from the third station 23 to the second station 22.

[0096] Referring to Figure 8 , Figure 1 , Figure 5 ,Figure 6 and Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 When the guide needle 15 is not deflected, the guide needle 15 is in the first working position 21, and the blocking piece unit 402 can be in the first position or the second position.

[0097] Other structures are similar to those of the second embodiment, and thus will not be described again.

[0098] The above is only a specific embodiment of the present application, but the design concept of the present application is not limited thereto, and any non-essential modification of the present application using the concept should be considered as an infringement of the protection scope of the present application.

Claims

1. A piezoelectric stop for a multi-station piezoelectric Jacquard, characterized in that: The device includes a piezoelectric bending actuator and a stop unit disposed on the front of the piezoelectric bending actuator. At least two conductive contacts are provided on the rear of the piezoelectric bending actuator. These conductive contacts are electrically connected to the piezoelectric ceramic portion of the actuator. When a high-level voltage is input to a conductive contact, the corresponding piezoelectric ceramic portion is in a charging state; when a low-level voltage is input to a conductive contact, the corresponding piezoelectric ceramic portion is in a grounding discharge state, causing the piezoelectric ceramic portion to drive the stop unit to oscillate. The stop unit includes a body and a protrusion, which are connected together to form a whole. The protrusion extends transversely to the direction of movement of the body. A portion of the body is used to limit the guide needle. When the protrusion is restrained on a portion of the piezoelectric Jacquard, the body stops oscillating. The main body includes a first outer sheet, a second outer sheet, and an inner sheet sandwiched between the first outer sheet and the second outer sheet. The tail of the first outer sheet, the tail of the inner sheet, and the tail of the second outer sheet surround to form a cavity, and the front part of the piezoelectric ceramic part is assembled in the cavity.

2. The piezoelectric stop for a multi-station piezoelectric Jacquard as described in claim 1, characterized in that: The piezoelectric stop is disposed on the piezoelectric jacquard, and when the piezoelectric ceramic part drives the stop unit to swing, a part of the stop unit is restricted to the bottom base part of the piezoelectric jacquard.

3. The piezoelectric stop for a multi-station piezoelectric Jacquard as described in claim 1, characterized in that: When the conductive contact is energized, the piezoelectric ceramic part causes the body part and the protrusion part to swing together, so that the protrusion part switches between a first position and a second position.

4. The piezoelectric stop for a multi-station piezoelectric Jacquard as described in claim 1, characterized in that: The body and the protrusion are connected together to form a whole by machining or integral casting.

5. The piezoelectric stop for a multi-station piezoelectric Jacquard as described in claim 1, characterized in that: The space between the piezoelectric ceramic portion and the cavity is filled with structural adhesive, which is viscous.

6. The piezoelectric stop for a multi-station piezoelectric Jacquard as described in claim 5, characterized in that: The first outer sheet, the second outer sheet, and the inner sheet are stacked together and then welded together to form a complete whole.

7. The piezoelectric stop for a multi-station piezoelectric Jacquard as described in claim 1, characterized in that: The piezoelectric bending actuator includes an insulating substrate and two piezoelectric ceramic sheets respectively disposed on both sides of the substrate. The conductive contacts are disposed on the tail of the piezoelectric ceramic sheets to achieve electrical connection. The two piezoelectric ceramic sheets respectively disposed on both sides of the substrate constitute the piezoelectric ceramic part.

8. A multi-station needle selector, characterized in that: The piezoelectric Jacquard has a plurality of yarn guide needles. The needle selector is used to limit the yarn guide needles when the corresponding yarn guide needles are switched at the work station. The needle selector includes a base, a plurality of piezoelectric stops disposed on the base, and a plurality of stops disposed on the front of the base. A portion of the piezoelectric stop extends into the intermediate space between two stops belonging to the piezoelectric stop. Each yarn guide needle is provided with at least one piezoelectric stop. The piezoelectric stop is the piezoelectric stop of any one of claims 1-7.

9. A multi-station needle selector as described in claim 8, characterized in that: The distance between the two stops is at least one pin position.

Images