Device for automatically adjusting needle pressing amount of triangle
By using a device that automatically adjusts the amount of triangular presser needles, and by linking piezoelectric ceramics and digital displacement sensors, the problem of time-consuming and labor-intensive adjustment of the amount of triangular presser needles is solved, thus achieving consistency in the amount of presser needles and improving the quality of the fabric.
Patent Information
- Application Number
- CN202423225262.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-26
AI Technical Summary
In existing technologies, adjusting the amount of pressure stitches on the triangular panels requires a lot of manual operation, which is time-consuming, labor-intensive, and makes it difficult to ensure the consistency of the pressure stitches on each triangle, thus affecting the fabric quality.
The device employs an automatic adjustment mechanism for the amount of pressure needles. It utilizes piezoelectric ceramics and a digital displacement sensor, and achieves automatic adjustment of the pressure needle amount through the linkage of the rotor assembly and the slider. Combined with a displacement feedback system, it achieves precise control.
It achieves automatic adjustment of the needle pressure amount, saving labor and time, improving the consistency of the triangular needle pressure amount, and enhancing the fabric quality.
Smart Images
Figure CN223607493U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a textile machinery technical field, concretely is a device of automatic regulation triangle needle pressure. BACKGROUND
[0002] The knitting component is the core component of the circular knitting machine, the cam that drives the knitting needle movement is installed on the cutting block of the knitting component, the cutting block is arranged in the circumference, so the cam is also arranged in the circumference. The cam needle pressure is an important parameter when the circular knitting machine works, when adjusting, the consistency of the needle pressure of each cam on the circumference needs to be ensured, if the needle pressure deviation is too large, the yarn tension will be uneven, which directly affects the cloth surface quality.
[0003] Prior art: the needle pressure is adjusted by manual adjustment. The worker will install the dial indicator on the needle cylinder, rotate the needle cylinder, move the dial indicator to each cutting block, adjust the adjusting device on the cutting block according to the dial indicator reading to adjust the needle pressure of the cam.
[0004] Defects: since the number of cams of a circular knitting machine is large, for example, the double-sided circular knitting machine has 120 paths, the number of cams that need to be adjusted can be up to 720. Moreover, when adjusting, the dial indicator is moved to the specified position by rotating the needle cylinder manually, when the needle cylinder is rotated too much, it cannot be reversed to the specified position, and can only be rotated again until the specified position is reached for adjustment. Therefore, the adjustment of the needle pressure is a time-consuming and labor-intensive work that tests the patience and experience of the workers. UTILITY MODEL CONTENT
[0005] The utility model provides a device of automatic regulation triangle needle pressure to solve the technical problems of the prior art.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device of automatic regulation triangle needle pressure, including cutting block, the right side of cutting block is installed with matched stator assembly and rotor assembly, the right side of cutting block is slidably provided with sliding block, the sliding block is installed with cam, the sliding block is equipped with displacement sensor, the rotor assembly and the sliding block are equipped with linkage, when the rotor assembly rotates, the sliding block can be slid up and down.
[0007] Preferably, the stator assembly includes a stator, a piezoelectric ceramic, a circuit board, and a base. The stator assembly has several piezoelectric ceramics, each piezoelectric ceramic is attached to the surface of the stator, and is evenly distributed in the circumferential direction. There is a natural gap between each piezoelectric ceramic. The circuit board is connected to the piezoelectric ceramic, and has several electrodes on it, which are in contact with each piezoelectric ceramic. The base has protrusions arranged corresponding to the gap between the piezoelectric ceramics. The protrusions formed on the base are embedded in the gap of the piezoelectric ceramic. The base wraps the circuit board and the piezoelectric ceramic, so that the stator assembly forms a whole.
[0008] Preferably, the rotor assembly comprises a rotor and rotor teeth, the rotor teeth are installed in the rotor tooth holes on the rotor, and a plurality of rotor teeth are evenly distributed in the circumferential direction.
[0009] Preferably, the linkage is an adjusting screw, the inside of the rotor is provided with a hexagonal hole, the adjusting screw is sleeved in the rotor, the hexagonal head at the tail of the adjusting screw is matched with the hexagonal hole of the rotor, the rotor can drive the adjusting screw to rotate when the rotor rotates, the tip of the adjusting screw is abutted against the sliding block when the adjusting screw is screwed through the threaded hole of the cutting block, and the contact surface between the sliding block and the adjusting screw is an inclined surface.
[0010] Preferably, a spring C is arranged between the hexagonal hole of the rotor and the threaded portion of the adjusting screw, in the installation, the stator assembly is first installed in the cutting block, then the rotor is installed, the spring C is placed in the rotor, and finally the adjusting screw is screwed into the threaded hole of the cutting block, so that the spring C can abut against the adjusting screw to compress the rotor.
[0011] Preferably, the displacement sensor adopts a digital displacement sensor, comprises a fixed grid part and a movable grid part, the fixed grid part is fixed on the cutting block, and the movable grid part is fixed on the sliding block, and when the sliding block moves, the displacement of the movable grid part relative to the fixed grid part changes.
[0012] Preferably, the left side of the cutting block is provided with a sliding groove, the upper end of the sliding groove is provided with a spring mounting groove one, the lower end of the sliding groove is provided with a spring mounting groove two, the spring mounting groove one is provided with a spring B, the spring mounting groove two is provided with a spring A, the sliding block is slidably arranged in the sliding groove, the screw A is screwed through the sliding block into the spring mounting groove one to abut against the spring B, and the spring A abuts against the lower end of the sliding block, so that the sliding block is compressed to the linkage through the spring A and the spring B.
[0013] Preferably, the triangle and the sliding block are fixed through a pin screw.
[0014] The beneficial effects of the utility model lie in that the scheme can realize automatic adjustment of the needle pressing amount, and saves labor and time. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a structural schematic view of the utility model;
[0016] Figure 2 It is a structural schematic view of the cutting block of the utility model;
[0017] Figure 3 It is a structural schematic view of the sliding block of the utility model;
[0018] Figure 4 It is a structural schematic view of the stator assembly of the utility model;
[0019] Figure 5The utility model discloses piezoelectric ceramic arrangement's structure schematic drawing;
[0020] Figure 6 The utility model discloses the overhead structure schematic drawing of stator subassembly;
[0021] Figure 7 The utility model discloses the structure schematic drawing of rotor subassembly;
[0022] Figure 8 The utility model discloses the overhead structure schematic drawing of rotor;
[0023] Figure 9 The utility model discloses the split structure schematic drawing of rotor subassembly and adjusting screw;
[0024] Figure 10 The utility model discloses the three-dimensional structure schematic drawing;
[0025] Figure 11 The utility model discloses the waveform schematic drawing of stator and rotor work.
[0026] In the drawing: 1, cut block;2, stator subassembly;21, stator;22, piezoelectric ceramic;23, circuit board;24, base;3, rotor subassembly;31, rotor;32, rotation tooth;33, rotation tooth hole;4, sliding block;5, sliding slot;6, spring mounting slot one;7, spring mounting slot two;8, spring B;9, spring A;10, adjusting screw;11, triangle;12, fixed grid portion;13, dynamic grid portion;14, notch;15, screw A;16, take pin screw;17, spring C;18, gap;19, convex rib. Specific implementation
[0027] The technical scheme of the utility model will be further specifically explained below by embodiment and in conjunction with the drawings.
[0028] Embodiment: a kind of device for automatically adjusting the amount of triangular pressure needle, as shown in Figures 1-10As shown, including cutting block, the right side of the cutting block is mounted with matching stator assembly and rotor assembly, the right side of the cutting block is provided with a sliding slot, the sliding block is slidably arranged in the sliding slot, the upper end of the sliding slot is provided with spring mounting groove one, the lower end of the sliding slot is provided with spring mounting groove two, spring B is mounted in spring mounting groove one, spring A is mounted in spring mounting groove two, the sliding block is slidably arranged in the sliding slot, at the same time, screw A passes through the sliding block into spring mounting groove one and abuts against spring B, spring A abuts against the lower end of the sliding block, the sliding block is pressed to the adjusting screw through spring A and spring B, the triangular is fixed on the sliding block through the pin screw, the sliding block has a pin hole, which cooperates with the pin screw to improve the installation accuracy of the triangular, the right side of the sliding block is attached with the moving grid part of the digital displacement sensor, correspondingly, the cutting block is mounted with the fixed grid part of the digital displacement sensor, when the sliding block moves, the displacement of the moving grid part relative to the fixed grid part changes, the fixed grid probe in the fixed grid part is opposite to the moving grid to detect the position of the sliding block, the specific structure of the digital displacement sensor will not be expanded, which belongs to the prior art, the adjusting screw is arranged between the rotor assembly and the sliding block, when the rotor assembly rotates, the sliding block can be promoted to slide up and down.
[0029] The stator assembly includes a stator, a piezoelectric ceramic, a circuit board and a base, the stator assembly has a plurality of piezoelectric ceramics, each piezoelectric ceramic is attached to the surface of the stator and is distributed in a circumferential direction, there is a gap between each piezoelectric ceramic, the circuit board is connected to the piezoelectric ceramic, the circuit board has a plurality of electrodes which are in contact with each piezoelectric ceramic, and the base is arranged with a protrusion corresponding to the gap between the piezoelectric ceramics, the protrusion formed on the base is embedded in the gap of the piezoelectric ceramic, and the base wraps the circuit board and the piezoelectric ceramic, so that the stator assembly forms an integrated whole.
[0030] The rotor assembly includes a rotor and a plurality of gear teeth which are arranged in a circumferential direction and are evenly distributed on the rotor.
[0031] The rotor has a hexagonal hole in the inside, the adjusting screw is sleeved in the rotor, the hexagonal head at the tail of the adjusting screw is matched with the hexagonal hole of the rotor, and the rotor can drive the adjusting screw to rotate when the rotor rotates, meanwhile, the adjusting screw passes through the threaded hole of the cutting block and abuts against the sliding block, the part of the sliding block in contact with the adjusting screw is provided with a notch, the contact surface between the sliding block and the adjusting screw is inclined, the spring C is arranged between the hexagonal hole of the rotor and the threaded part of the adjusting screw, the right side of the hexagonal hole is provided with a step for installing the limiting spring C, the spring C is fixed between the step and the tail of the adjusting screw and is sleeved on the outer side of the thread of the adjusting screw.
[0032] Working principle
[0033] 1. Realization of sliding block displacement
[0034] As Figure 11As shown, the piezoelectric ceramic on the given sub is given a corresponding sinusoidal excitation power source, so that the piezoelectric ceramic generates axial deformation to form an excitation source.
[0035] The inherent vibration of the stator is excited by the vibration of the excitation source, and the stator generates a sinusoidal wave-like deformation. If the stator assembly is cut along the radius and flattened, a sinusoidal wave as shown in the figure is obtained. The stator will vibrate between two sinusoidal waves, and the equilibrium point is where the stator does not vibrate.
[0036] In the initial position, the rotor teeth are located at any position. At this time, the rotor teeth are pressed against the surface of the stator. As the stator continuously vibrates, the rotor teeth will gradually move to the equilibrium point, i.e. position A.
[0037] When the power-on sequence of the piezoelectric ceramic changes in a certain pattern, the deformation of the stator will shift circumferentially, i.e. from position A to position B.
[0038] Since the rotor teeth are still pressed against the surface of the stator, when the deformation on the stator shifts, the rotor teeth will still gradually move to the equilibrium point, i.e. position C, which is equivalent to pushing the rotor teeth to move, thereby realizing the rotation of the rotor with a step angle α.
[0039] At this time, the adjusting screw rotates with the rotor. Since the adjusting screw and the cutting block are threadedly connected, when the adjusting screw rotates, the adjusting screw and the cutting block will rotate in and out.
[0040] Due to the action of spring A and spring B on the slider, the slider always maintains upward pressure on the adjusting screw. Since the slider and the adjusting screw are in contact with each other, when the adjusting screw rotates in and out, the slider will move downward and upward.
[0041] 2. Measurement of slider displacement
[0042] The moving grid part attached to the slider and the fixed grid part form a displacement measurement module. When the slider moves, the main plate of the fixed grid part can measure the displacement of the slider. The measurement method used can be a fixed grid, a capacitive grid or a magnetic grid.
[0043] 3. Automatic adjustment of needle pressing amount
[0044] After the measurement of the displacement of the slider and the displacement amount is achieved, the automatic adjustment of the needle pressing amount can be achieved by constructing a displacement feedback system. First, adjust the zero position of the cutting block. This step is completed when the cutting block is assembled. Then set the needle pressing amount, i.e. the displacement amount of the slider, in the control system. Finally, the rotor rotates according to the system settings, and the displacement measurement module feeds back the measured displacement to the control system, thereby achieving precise control of the rotor and completing the automatic adjustment of the needle pressing amount.
[0045] The above is a further detailed description of the provided technical solutions in combination with the preferred embodiments of the present patent, and cannot be deemed as limiting the specific implementation of the present patent to the above description. For ordinary skilled persons in the technical field to which the present patent belongs, some simple deductions or replacements can be made without departing from the concept of the present patent, and all of them shall be deemed as falling within the protection scope of the present patent.
Claims
1. A device for automatically adjusting the amount of pressure applied by a triangular presser foot, characterized by: The cutting block is provided with a matched stator assembly and rotor assembly on the right side, a sliding block is arranged on the right side of the cutting block, a triangle is arranged on the sliding block, a displacement sensor is arranged on the sliding block in correspondence, a linkage is arranged between the rotor assembly and the sliding block, and the sliding block can slide up and down when the rotor assembly rotates.
2. A device for automatically adjusting the amount of pressure of the triangular presser foot according to claim 1, characterized in that: The stator assembly comprises a stator, piezoelectric ceramics, a circuit board and a base. The stator assembly is provided with a plurality of piezoelectric ceramics, each of which is attached to the surface of the stator in a circumferential distribution. A gap naturally exists between each piezoelectric ceramic. The circuit board is connected to the piezoelectric ceramics, and the circuit board is provided with a plurality of electrodes in contact with each piezoelectric ceramic. The base is provided with a protruding rib corresponding to the gap between the piezoelectric ceramics. The protruding rib formed on the base is embedded in the gap of the piezoelectric ceramic. The base wraps the circuit board and the piezoelectric ceramic, so that the stator assembly forms an integrated whole.
3. The device of claim 1, wherein: The rotor assembly comprises a rotor and a plurality of gear teeth, which are arranged in the gear tooth holes on the rotor in a circumferential distribution.
4. A device for automatically adjusting the amount of pressure applied by the triangular presser foot according to claim 3, characterized in that: The linkage is an adjusting screw. The rotor is provided with a hexagonal hole. The adjusting screw is sleeved in the rotor. The hexagonal head at the tail of the adjusting screw is matched with the hexagonal hole of the rotor. When the rotor rotates, the adjusting screw can also rotate. At the same time, the adjusting screw is screwed through the threaded hole of the cutting block, and the tip of the adjusting screw abuts against the sliding block. The contact surface between the sliding block and the adjusting screw is an inclined surface.
5. The device of claim 1, wherein: A spring C is arranged between the hexagonal hole of the rotor and the threaded part of the adjusting screw.
6. The device of claim 1, wherein: The displacement sensor is a digital displacement sensor, which comprises a fixed grid part and a movable grid part. The fixed grid part is fixed on the cutting block, and the movable grid part is fixed on the sliding block. When the sliding block moves, the displacement of the movable grid part relative to the fixed grid part changes.
7. The device of claim 1, wherein: The cutting block is provided with a sliding groove. The upper end of the sliding groove is provided with a spring mounting groove one, and the lower end of the sliding groove is provided with a spring mounting groove two. Spring B is arranged in the spring mounting groove one, and spring A is arranged in the spring mounting groove two. The sliding block is arranged in the sliding groove in a sliding manner. Screw A is screwed through the sliding block into the spring mounting groove one to abut against spring B. Spring A abuts against the lower end of the sliding block. The sliding block is pressed against the linkage by spring A and spring B.
8. The device of claim 1, wherein: The triangle and the sliding block are fixed by a pin screw.