CN214992319U - Color changing device and computerized embroidery machine - Google Patents

Abstract

The utility model provides a trade look device and computerized embroidery machine, including motor, lead screw, gear rotating assembly and detection component, gear rotating assembly includes base and at least two gear units that set up in the base, and each gear unit includes axis of rotation and the gear of cover setting on the axis of rotation, and the gear of a plurality of gear units meshes in proper order, and the number of teeth of the driven side gear in every two intermeshing gears is greater than the number of teeth of the driving side gear; the plurality of gear units comprise a main shaft gear unit, and a rotating shaft, a screw rod and an output shaft of the motor in the main shaft gear unit synchronously rotate; the detection assembly comprises a processor and a rotation sensor, the rotation sensor and the gear are correspondingly arranged and used for detecting the rotation angle of the gear relative to the reference position, and the processor determines the current needle position of the color changing device through the position information. The color changing device provided by the utility model has compact structure and small occupied space.

Description

Color changing device and computerized embroidery machine

Technical Field

The utility model relates to a spinning machine technique especially relates to a trade look device and computerized embroidery machine.

Background

The computerized embroidery machine is the most advanced embroidery machine of the present generation, can realize the high speed and high efficiency of the traditional manual embroidery, and can also realize the requirements of 'multi-level, multi-function, unity and perfection' which can not be reached by the manual embroidery. The color changing device can automatically change colors according to a preset color changing sequence in the embroidering process, and acquires needle position information and feeds the needle position information back to a computer embroidery machine control system so as to ensure the color changing positioning precision.

The color changing device in the prior art mostly adopts a lead screw to change colors, and comprises a box body, a motor, a lead screw, a push-pull rod, a slide block, a position detection circuit board and a sensor, wherein the sensor comprises a sensing end and a sensed end. The motor is arranged at one end of the box body, an output shaft of the motor is connected with one end of the screw rod, the other end of the screw rod is supported at the other end of the box body through a bearing, and a nut matched with the screw rod is connected with the sliding block; one end of the push-pull rod is connected with the sliding block, and the other end of the push-pull rod extends out of the box body to be connected with a needle rod frame on the computerized embroidery machine head. The sensed ends are linearly arranged on the position detection circuit board at a certain interval, the number of the sensed ends is determined according to the number of the needle rods, and the position detection circuit board is fixed on the box body. The induction end is arranged on the sliding block. When the color is changed, the motor is connected with the lead screw to drive the sliding block to do linear motion, so that the needle bar frame is driven to realize color change, and when the sensed end receives a signal of the sensing end, the position detection circuit board sends the current working needle position information to the computerized embroidery machine control system.

However, the number of the sensed ends is determined according to the number of the needle bars, so that when the number of the needle bars is increased, the length of the circuit board is increased, the volume of the color changing device is further increased, and the required installation space is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a trade look device and computerized embroidery machine to solve prior art, when the needle bar number increases, trade the technical problem of look device's volume increase.

The utility model provides a color changing device, which comprises a motor, a screw rod, a gear rotating assembly and a detection assembly, wherein the gear rotating assembly comprises a base and at least two gear units arranged in the base, each gear unit comprises a rotating shaft and a gear sleeved on the rotating shaft, the gears of a plurality of gear units are meshed in sequence, and the number of teeth of a driven side gear in every two gears meshed with each other is greater than that of a driving side gear; the plurality of gear units comprise a main shaft gear unit, and a rotating shaft, a screw rod and an output shaft of the motor in the main shaft gear unit synchronously rotate;

the detection assembly comprises a processor and a rotation sensor, the rotation sensor and the gears are correspondingly arranged and used for detecting the rotation angles of the at least two gears relative to the reference position, and the processor is used for obtaining the position information of the screw rod according to the rotation angles detected by the rotation sensor so as to determine the current needle position of the color changing device through the position information.

As an optional mode, the utility model provides a trade look device, the axis of rotation of two at least gear units is parallel to each other.

As an optional mode, the utility model provides a color changing device, the axis of rotation in a plurality of gear units has first axis of rotation, and the rotational speed of the gear on the axis of rotation in the main shaft gear unit is the integral multiple of the rotational speed of the gear on the first axis of rotation; the rotation sensor is used for detecting a rotation angle of the gear on the first rotation axis relative to a reference position.

As an optional mode, the utility model provides a trade look device, gear revolve subassembly include two first rotation axes, and the rotation axis in two first rotation axes and the main shaft gear unit is not the collineation.

As an optional mode, the utility model provides a trade look device, rotation sensor is a plurality of, and different rotation sensor are used for detecting the turned angle of different gears.

As an optional mode, in the color changing device provided by the present invention, the gear unit further includes a magnetic member, and the magnetic member and the gear rotate synchronously; the rotation sensor is a magnetic sensor for detecting a rotation angle of the magnetic member with respect to a reference position.

As an optional mode, the utility model provides a trade look device, gear unit still include the magnetic shield ring, and the magnetic shield ring encircles the outside at the magnetic part.

As an optional mode, the utility model provides a trade look device, gear revolve assembly sets up the one side that deviates from the lead screw at the output shaft of motor.

As an optional mode, the utility model provides a trade look device trades look device still includes the circuit board, and the circuit board is installed on the base, and treater and rotation sensor set up on the circuit board.

The utility model provides a computer embroidery machine, including embroidery aircraft nose and foretell look device that trades, trade the iron stand on look device and the embroidery aircraft nose and be connected.

The utility model provides a trade look device and computerized embroidery machine, through setting up gear rotating assembly and detection subassembly, gear rotating assembly includes base and two at least gear units that set up in the base, gear unit includes axis of rotation and the cover is established at the epaxial gear of axis of rotation, the gear of a plurality of gear units meshes in proper order, and the number of teeth of driven side gear in every two intermeshing gears is greater than the number of teeth of driving side gear, realize the speed reduction and make the angle of each grade gear rotation reduce in proper order in the same time, make things convenient for detection subassembly angle to detect; the plurality of gear units comprise a main shaft gear unit, and a rotating shaft, a screw rod and an output shaft of the motor in the main shaft gear unit synchronously rotate; the detection assembly is used for detecting the rotation angle information of at least two gears relative to the reference position, and processing the rotation angle information according to the detected rotation angle information to obtain the current needle position information, so that the technical problem that the size of the color changing device is increased along with the increase of the number of needle rods is solved, and the whole device is compact in structure and small in occupied space.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a color changing device according to an embodiment of the present invention;

fig. 2 is an exploded view of a gear rotating assembly in the color changing device according to the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a gear unit in the color changing device according to an embodiment of the present invention;

fig. 4 is a schematic view of a position relationship between a gear rotating assembly and a detecting assembly in the color changing device according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a motor in the color changing device according to an embodiment of the present invention;

fig. 6 is a front view of a gear rotating assembly in the color changing device according to the embodiment of the present invention;

fig. 7 is an isometric view of a gear rotating assembly in the color changing device provided by the embodiment of the present invention;

fig. 8 is a left side view of a gear rotating assembly in the color changing device according to the embodiment of the present invention;

fig. 9 is a top view of a gear rotating assembly in the color changing device according to the embodiment of the present invention;

fig. 10 is a schematic structural view of a computerized embroidery machine according to an embodiment of the present invention.

Description of reference numerals:

1000-color changing device;

1100-motor;

1110 — an output shaft of the motor;

1111-a first output terminal;

1112-a second output;

1200-a geared rotating assembly;

1210-a base;

1211-central hole;

1212-mounting holes;

1220-main shaft gear unit;

1221-a first main rotation axis;

1222-a first gear;

1230 — first gear unit;

1231-a second primary rotational axis;

1232-a first secondary rotation axis;

1233-second countershaft;

1234-a second gear;

1240-a second gear unit;

1241-third main rotation axis;

1242-third gear;

1250-a magnetic member;

1260-magnetic shield ring;

1300-a detection assembly;

1310-a rotation sensor;

1400-a circuit board;

2000-computerized embroidery machine;

2100-an embroidery machine head;

2110-needle bar holder.

Detailed Description

The computerized embroidery machine mainly comprises an embroidery device, a color changing device and a frame moving device. The embroidery device comprises a machine head and a needle bar frame arranged on the machine head, wherein needle bars are arranged on the needle bar frame at equal intervals, each needle bar is connected with embroidery threads with different colors, and the needle bars drive the embroidery threads to move up and down. The frame moving device comprises an embroidery frame and a transmission device, the embroidery frame is used for clamping cloth, and the transmission device drives the embroidery frame to move along the warp and weft directions. The color changing device can drive the needle bar frame to move along the weft direction. The needle bar frame on the machine head is suspended above the cloth clamped by the embroidery frame, and the color changing device is usually fixedly arranged relative to the machine head and used for pushing the needle bar frame on the machine head to move the needle bar with the required color above the embroidery position. When the computerized embroidery machine is in operation, the needle rod moves up and down in a reciprocating manner, and the embroidery frame reciprocates along the directions of the warp and the weft in the plane according to the pattern requirements, so that the embroidery is finished. The implementation of the color changing technique puts forward the requirement of identifying the current needle bar position, and the displacement of the needle bar frame needs to be detected. The color changing device in the prior art comprises a box body, a motor, a screw rod, a push-pull rod, a sliding block, a position detection circuit board and a sensor, wherein the sensor comprises a sensing end and a sensed end. The motor is arranged at one end of the box body, an output shaft of the motor is connected with one end of the screw rod, the other end of the screw rod is supported at the other end of the box body through a bearing, and a nut matched with the screw rod is connected with the sliding block; one end of the push-pull rod is connected with the sliding block, and the other end of the push-pull rod extends out of the box body to be connected with a needle rod frame on the computerized embroidery machine head. The induced ends are linearly arranged on the position detection circuit board at a certain interval, the position detection circuit board is fixed on the box body, and the induced ends are arranged on the sliding block. When the color is changed, the motor is connected with the lead screw to drive the sliding block to do linear motion, so that the needle bar frame is driven to move to realize color change, and when the induction end is detected by the induction end, the position detection circuit board sends the current working needle position information to the computerized embroidery machine control system. In the position detection mode, the number of the sensed ends on the circuit board is set according to the number of the needle bars on the needle frame rod, and the sensed ends are arranged on the position detection circuit board at intervals along the same direction, so that when the colors of embroidery threads needed by textile patterns are more, the number of the needle bars is increased, the length size of the circuit board is increased, the size of the color changing device is increased, the installation space needed by the color changing device is enlarged, and the equipment cost is increased.

In order to solve the technical problem, the utility model provides a trade look device, the linear position information of fixed point changes the rotational position information of pivot in the gear unit from the slider of whole motion process on the detection content of determine module, and gear unit main shaft rotates with the motor shaft is synchronous to obtain the rotation angle of motor shaft and the positional information of current needle bar, realized carrying out the tracking monitoring to the position of needle bar. The technical problem that the size of the color changing device is increased along with the increase of the number of the needle rods is solved through the detection mode, so that the whole device is compact in structure, small in occupied space and low in cost.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a color changing device according to an embodiment of the present invention; fig. 2 is an exploded view of a gear rotating assembly in the color changing device according to the embodiment of the present invention; fig. 3 is a schematic structural diagram of a gear unit in the color changing device according to an embodiment of the present invention; fig. 4 is a schematic view of a position relationship between a gear rotating assembly and a detecting assembly in the color changing device according to the embodiment of the present invention; fig. 5 is a schematic structural diagram of a motor in the color changing device according to an embodiment of the present invention; fig. 6 is a front view of a gear rotating assembly in the color changing device according to the embodiment of the present invention; fig. 7 is an isometric view of a gear rotating assembly in the color changing device provided by the embodiment of the present invention; fig. 8 is a left side view of a gear rotating assembly in the color changing device according to the embodiment of the present invention; fig. 9 is a top view of a gear rotating assembly in the color changing device according to the embodiment of the present invention. As shown in fig. 1 to 9, the color changing apparatus 1000 of the present invention includes a motor 1100, a lead screw (not shown), a gear rotating assembly 1200 and a detecting assembly 1300.

The gear rotating assembly 1200 comprises a base 1210 and at least two gear units arranged in the base 1210, each gear unit comprises a rotating shaft and a gear sleeved on the rotating shaft, the gears of the gear units are sequentially meshed, and the number of teeth of a driven side gear in every two mutually meshed gears is greater than that of teeth of a driving side gear; the plurality of gear units include a spindle gear unit 1220, and a rotating shaft, a lead screw and an output shaft 1110 of the motor in the spindle gear unit synchronously rotate; the detecting assembly 1300 includes a processor and a rotation sensor 1310, the rotation sensor 1310 is disposed corresponding to the gears and is configured to detect a rotation angle of at least two gears relative to a reference position, and the processor is configured to obtain position information of the lead screw according to the rotation angle detected by the rotation sensor 1310, so as to determine a current needle position of the color changing apparatus 1000 according to the position information.

In the present embodiment, there are 3 gear units, including the spindle gear unit 1220, the first gear unit 1230 and the second gear unit 1240, and when the number of needle bars required by the machine is small, for example, 10 needles, the color changing device 1000 can only mount the spindle gear unit 1220 and the first gear unit 1230, so as to save cost. When the number of needle bars required by the machine is large, for example 50 needles, the color changing device can be provided with a spindle gear unit 1220, a first gear unit 1230 and a second gear unit 1240 to meet the detection requirement.

The embodiment of the utility model provides a, through setting up gear rotating assembly 1200 and detection subassembly 1300, gear rotating assembly 1200 includes base 1210 and two at least gear units that set up in base 1210, gear unit includes axis of rotation and the cover is established at the epaxial gear of axis of rotation, the gear of a plurality of gear units meshes in proper order, and the number of teeth of driven side gear in every two intermeshing gears is greater than the number of teeth of driving side gear, realize the speed reduction and make the angle of gear rotation at different levels reduce in proper order in the same time, make things convenient for detection subassembly angle to detect; the plurality of gear units include a spindle gear unit 1220, and a rotating shaft, a lead screw and an output shaft 1110 of the motor in the spindle gear unit synchronously rotate; the detection assembly 1300 is used for detecting the rotation angle information of at least two gears relative to the reference position, and processing the rotation angle information according to the detected rotation angle information to obtain the current needle position information, so that the technical problem that the size of the color changing device 1000 is increased along with the increase of the number of needle rods is solved, and the whole device is compact in structure and small in occupied space.

In some embodiments, the rotating shafts of at least two gear units are arranged in parallel, and it can be understood that the parallel arrangement of the rotating shafts realizes speed reduction by utilizing straight gear meshing transmission, so that the structure is more compact, and the occupied space of the device is reduced.

In some embodiments, the rotating shafts of the plurality of gear units have a first rotating shaft, and the rotation speed of the gears on the rotating shafts of the spindle gear units is an integral multiple of the rotation speed of the gears on the first rotating shaft; the rotation sensor 1310 is used to detect the rotation angle of the gear with respect to the reference position.

Specifically, the color changing device 1000 is provided with two gear units, namely a spindle gear unit 1220 and a first gear unit 1230, the spindle gear unit 1220 includes a first main rotating shaft 1221 and a first gear 1222 sleeved on the first main rotating shaft 1221, and the first gear 1222 rotates synchronously with the first main rotating shaft 1221. The first gear unit 1230 includes a second main rotation shaft 1231 and 2 sub rotation shafts, gears are sleeved on the second main rotation shaft 1231 and the 2 sub rotation shafts, the gears are sequentially engaged, the number of teeth of the driven side gear in every two gears engaged with each other is greater than that of the driving side gear, and the second gear 1234 on the second main rotation shaft 1231 is located at the end of the first gear unit 1230 and is used for being connected with the next gear unit. The rotation sensor 1310 is used to detect the rotation angles of the first gear 1222 and the second gear 1234.

Illustratively, the first gear 1222 on the first main rotating shaft 1221 makes 30 rotations, and the second gear 1234 makes 1 rotation, i.e., the reduction ratio of the two is 30, wherein the reduction ratio of the first gear 1222 to the gear on the first sub rotating shaft 1232 may be 2.5, the reduction ratio of the first sub rotating shaft 1232 to the gear on the second sub rotating shaft 1233 may be 3, and the reduction ratio of the gear on the second sub rotating shaft 1233 to the second gear 1234 may be 4.

Specifically, the rotation sensor 1310 detects the rotation angle of the first gear 1222 and the second gear 1234, the detection value of the rotation sensor 1310 is valid within a single rotation range, i.e., 360 °, and when the rotation angle is greater than or equal to 360 °, the rotation sensor 1310 will start detecting from zero again, and by using this recording method, the absolute position, angle and number of rotations of the device are determined. Namely, once the position, the angle and the number of turns are fixed, the indication value of the rotation sensor 1310 is only fixed whenever, so that the embroidery machine color changing device 1000 can keep the position information after power failure, and can accurately follow the power failure after power up next time.

When the rotation angle of the first gear 1222 on the first main rotating shaft 1221 is less than 360 °, the detected rotation angle of the first gear 1222 is the actual rotation angle of the output shaft 1110 of the motor, and the pitch of the lead screw can obtain the information of the current needle position through the rotation angle of the output shaft 1110 of the motor, based on the rotation angle of the first gear 1222 on the first main rotating shaft 1221.

When the actual rotation angle of the first gear 1222 on the first main rotation axis 1221 is equal to or greater than 360 °, and the rotation angle of the second gear 1234 on the second main rotation axis 1231 is less than 360 °, it can be understood that when the actual rotation angle of the first gear 1222 is equal to or greater than 360 °, the rotation sensor 1310 will start detecting from zero again, so that it is necessary to perform auxiliary recording of the number of rotations of the first gear 1222 by using the next-stage gear unit. Illustratively, when the actual rotation angle of the first gear 1222 is 900 °, and the reduction ratio between the first gear 1222 and the second gear 1234 is 30, that is, when the first gear 1222 rotates one turn, the second gear 1234 rotates 12 °, the rotation sensor 1310 corresponding to the second gear 1234 takes the rotation 12 ° as a node, detects the rotation angle of the second gear 1234, and records the maximum node number, which is a multiple of 12, so that when the actual rotation angle of the first gear 1222 is 900 °, the rotation sensor 1310 detects 24 ° and the rotation sensor 1310 detects 180 ° of the first gear 1222. The motor rotation angle (900 °) is obtained by 30 times the angle (24 °) of the second gear 1234 plus the angle (180 °) of the first gear 1222, i.e., 720 ° plus 180 °.

It is understood that in the present embodiment, the output shaft 1110 of the motor, the first main rotating shaft 1221 and the first gear 1222 fixed on the first main rotating shaft 1221 rotate synchronously, and the first gear 1222 sequentially drives the gear on the first auxiliary rotating shaft 1232, the gear on the second auxiliary rotating shaft 1233 and the second gear 1234 on the second main rotating shaft 1231 to rotate, wherein the first auxiliary rotating shaft 1232, the second auxiliary rotating shaft 1233 and the second main rotating shaft 1231 are fixed. In some embodiments, the first gear 1222 may drive the first auxiliary rotating shaft 1232, the second auxiliary rotating shaft 1233, and the second main rotating shaft 1231 in a linkage manner.

In some embodiments, gear rotation assembly 1200 includes two first rotational axes, the two first rotational axes and first main rotational axis 1221 being non-collinear.

Specifically, the color changer 1000 is provided with three gear units, namely a spindle gear unit 1220, a first gear unit 1230 and a second gear unit 1240, the second gear unit 1240 comprises a third main rotating shaft 1241 and a third gear 1242 sleeved on the shaft, and the second gear unit 1240 is in meshing transmission with the third gear 1242 on the second main rotating shaft 1231.

It can be understood that when the rotation angle of the second gear 1234 is greater than or equal to 360 °, the detection of the position information during color changing for a larger number of needle bars can be satisfied by collecting the rotation angle of the third gear 1242 on the third main rotation shaft 1241. Illustratively, the reduction ratio of the first gear 1222 to the second gear 1234 is 30, and the second gear 1234 rotates 72 ° when the reduction ratio of the third gear 1242 is 5, i.e. the first gear 1222 rotates 30 circles, the second gear 1234 rotates 1 circle correspondingly, and the third gear 1242 rotates 72 °, and the rotation sensor 1310 corresponding to the third gear 1242 takes the rotation 72 ° as a node, and detects and records the rotation angle of the third gear 1242.

The principle and the technical effect of detecting the rotation angle of the third gear 1242 are the same as those of the second gear 1234, and detailed description is given in the above embodiments, which is not repeated herein.

In some embodiments, the rotation sensor 1310 is plural, and different rotation sensors 1310 are used to detect the rotation angles of different gears. Specifically, referring to fig. 2, the number of the rotation sensors 1310 is 3, and the rotation angles of the first gear 1222, the second gear 1234 and the third gear 1242 are detected respectively, so as to improve the detection accuracy.

In some embodiments, the gear unit further includes a magnetic member 1250, the magnetic member 1250 rotates synchronously with the gear, and in particular, the magnetic member 1250 of the spindle gear unit 1220 is disposed at an end of the first main rotating shaft 1221; the first gear unit 1230 and the second gear unit 1240 are connected to the second gear 1234 and the third gear 1242, respectively, and the rotation sensor 1310 is a magnetic sensor for detecting a rotation angle of the magnetic member 1250 with respect to a reference position.

In some embodiments, the magnetic members 1250 are linked with the corresponding gears, and each magnetic member 1250 is spaced from one magnetic sensor, for example, the magnetic members 1250 may be magnets, and the magnetic sensors may be magnetic encoder chips, so that the overall mechanism is compact and convenient for field installation.

In some embodiments, the gear unit further comprises a magnetic shielding ring 1260, the magnetic shielding ring 1260 surrounding the outside of the magnetic member 1250. The portion of the magnetic member 1250 exposed to the magnetic shielding ring 1260 is disposed opposite to the corresponding magnetic sensor. A ferromagnetic absorbing material is designed around the magnetic member 1250 to absorb the changing energy of the external magnetic field and shield the magnetic member 1250 from interfering with the magnetic field.

In some embodiments, the geared rotating assembly 1200 is disposed on a side of the output shaft 1110 of the motor that faces away from the lead screw.

Specifically, referring to fig. 5, the output shaft 1110 of the motor has a first output 1111 and a second output 1112, the first output 1111 is connected to the screw, and the second output 1112 is connected to the first main rotating shaft 1221 of the gear rotating assembly 1200.

Alternatively, as shown in fig. 6 and 7, a center hole 1211 is formed at the center of the base 1210 for mounting the first main rotating shaft 1221, a mounting hole 1212 communicating with the center hole 1211 is formed at the upper side of the base 1210, and an inner hole is formed at the end of the first main rotating shaft 1221. During the installation, insert the second output 1112 of motor output shaft 1110 in the hole, the mounting tool stretches into base 1210 through the mounting hole, and rotatory jackscrew is fixed output shaft 1110 and first main axis of rotation 1221 of motor to guarantee the synchronism of both movements.

Optionally, the motor 1100 is a stepping motor or a servo motor, the gear rotating assembly 1200 and the detecting assembly 1300 are used for detecting the position of the motor rotor, a DSP (Digital Signal processing) chip is used for matching with a peripheral power circuit to realize accurate control of the position of the motor 1100, the driver receives an instruction, the motor is controlled to drive the lead screw to move, and high-speed accurate color changing control is realized.

In some embodiments, the color changing apparatus 1000 further includes a circuit board 1400, the circuit board 1400 is mounted on the base 1210, and the processor and the rotation sensor 1310 are disposed on the circuit board 1400, so that the rotation sensors 1310 can detect on the same plane, and the mechanism layout is reasonable and compact, and is convenient to install.

Optionally, the color changing device 1000 further includes a display module for displaying the number of the currently operating needle bar. Specifically, a digital tube mode may be adopted, and the display module and the color changing module are connected by a CAN (Controller Area Network) communication. The display module can be conveniently arranged at a place where the viewing is convenient. In some embodiments, the display module is provided with a built-in processor for sampling data on the CAN communication line in real time and displaying the data through 2 1-inch big nixie tubes.

Fig. 10 is a schematic structural view of a computerized embroidery machine according to an embodiment of the present invention. Referring to fig. 10, the computerized embroidery machine 2000 according to the present invention comprises an embroidery head 2100 and the color changing device 1000 according to the above embodiment, wherein the color changing device 1000 is connected to a needle bar frame 2110 on the embroidery head 2100.

The structure and principle of the color changing device 1000 are described in detail in the above embodiments, which are not repeated herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A color changing device is characterized by comprising a motor, a screw rod, a gear rotating assembly and a detection assembly, wherein the gear rotating assembly comprises a base and at least two gear units arranged in the base, each gear unit comprises a rotating shaft and a gear sleeved on the rotating shaft, gears of the gear units are meshed in sequence, and the number of teeth of a driven side gear in every two gears meshed with each other is greater than that of teeth of a driving side gear; the gear units comprise a main shaft gear unit, and a rotating shaft in the main shaft gear unit, the screw rod and an output shaft of the motor synchronously rotate;

the detection assembly comprises a processor and a rotation sensor, the rotation sensor and the gears are correspondingly arranged and used for detecting the rotation angles of at least two gears relative to a reference position, and the processor is used for obtaining the position information of the screw rod according to the rotation angles detected by the rotation sensor so as to determine the current needle position of the color changing device through the position information.

2. The color changing apparatus according to claim 1, wherein the rotation axes of the at least two gear units are arranged parallel to each other.

3. The color changing apparatus according to claim 1, wherein the rotary shaft of the plurality of gear units has a first rotary shaft, and a rotational speed of a gear on the rotary shaft of the spindle gear unit is an integral multiple of a rotational speed of a gear on the first rotary shaft; the rotation sensor is configured to detect a rotation angle of the gear on the first rotation axis with respect to the reference position.

4. The color changing apparatus according to claim 3, wherein the gear rotating assembly includes two of the first rotating shafts, and the two first rotating shafts and the rotating shaft in the spindle gear unit are not collinear.

5. The color changing apparatus according to any one of claims 1 to 4, wherein the rotation sensor is plural, and different ones of the rotation sensors are used to detect the rotation angles of different ones of the gears.

6. The color changing apparatus according to claim 5, wherein the gear unit further comprises a magnetic member, and the magnetic member and the gear rotate synchronously;

the rotation sensor is a magnetic sensor and is used for detecting the rotation angle of the magnetic part relative to the reference position.

7. The color changing apparatus according to claim 6, wherein the gear unit further comprises a magnetic shielding ring surrounding an outer side of the magnetic member.

8. The color changing apparatus according to any one of claims 1 to 4, wherein the gear rotating assembly is provided on a side of the output shaft of the motor facing away from the lead screw.

9. The color changing apparatus as claimed in any one of claims 1 to 4, further comprising a circuit board mounted on said base, said processor and said rotation sensor being disposed on said circuit board.

10. A computerized embroidery machine comprising an embroidery head and a color changing device as claimed in any one of claims 1 to 9, said color changing device being connected to a needle bar holder on said embroidery head.

Images