A gauge adjustment device and control method

Abstract

This invention discloses a stitch length adjustment device and control method, relating to the field of sewing equipment technology. The stitch length adjustment device includes: a stitch length adjustment assembly, comprising a first eccentric member and a second eccentric member, which are rotatably arranged relative to each other around the same rotation axis; a main drive member, which is connected to the stitch length adjustment assembly in a transmission manner; a positioning component, used to acquire the reference position information of the stitch length adjustment assembly; a state switching component, which cooperates with the stitch length adjustment assembly; and a control component, which is signal-connected to the main drive member, the positioning component, and the state switching component, respectively. The above-mentioned stitch length adjustment device automatically completes stitch length adjustment according to the target stitch length by controlling the relative rotation of the first and second eccentric members, reducing the impact of repeated manual positioning and rotation operations on the stitch length setting result, improving the accuracy and consistency of stitch length adjustment, increasing the debugging efficiency of sewing equipment, and reducing wear caused by frequent manual engagement adjustments.

Description

Technical Field

[0001] This invention relates to the field of sewing equipment technology, and in particular to a stitch length adjustment device and control method. Background Technology

[0002] Sewing equipment is widely used in the processing of clothing, bags, home textiles, and other products. Stitch length is a crucial parameter affecting the appearance, strength, and consistency of the sewn stitches. For fabrics of different materials, thicknesses, or sewing techniques, the stitch length typically needs to be adjusted according to the process requirements to meet the diverse sewing needs. In existing wrist sewing machines and similar equipment, stitch length adjustment usually employs a mechanical method. This method generally utilizes a combination of a stitch length adjustment pin, a limit slot, a main shaft handwheel, and a feed drive eccentric wheel. The operator needs to engage the stitch length adjustment pin in the corresponding position and simultaneously rotate the main shaft handwheel to change the eccentricity of the feed drive eccentric wheel, thereby adjusting the horizontal feed amount of the feed dog.

[0003] However, the above-mentioned needle spacing adjustment method is highly dependent on manual operation. During the adjustment process, the operator needs to repeatedly cooperate in positioning and rotation operations. The needle spacing setting result is easily affected by the operator's proficiency, rotation angle control and positioning status, resulting in an unstable needle spacing adjustment process and difficulty in quickly and accurately setting the target needle spacing. Summary of the Invention

[0004] The purpose of this invention is to provide a needle spacing adjustment device and control method, which solves the technical problems of existing needle spacing adjustment methods that rely heavily on manual operation, require operators to repeatedly coordinate positioning and rotation operations during the adjustment process, and are not stable enough to quickly and accurately complete the setting of the target needle spacing.

[0005] To achieve the above objectives, the present invention provides a needle spacing adjustment device, comprising: The stitch pitch adjustment assembly includes a first eccentric member and a second eccentric member, which are rotatably arranged relative to each other around the same rotation axis, so as to change the combined eccentricity of the stitch pitch adjustment assembly by changing the relative angle between the first eccentric member and the second eccentric member. The main drive component is connected to the needle pitch adjustment assembly for driving the first eccentric component and / or the second eccentric component to rotate; A positioning component is used to acquire the reference position information of the needle pitch adjustment component; A state switching component, cooperating with the stitch pitch adjustment component, is used to switch the stitch pitch adjustment component between a locked state and an adjusted state. In the locked state, the relative angle between the first eccentric member and the second eccentric member remains unchanged. In the adjusted state, the first eccentric member and the second eccentric member can rotate relative to each other. A control component is signal-connected to the main drive component, the positioning component, and the state switching component, respectively. The control component is configured to receive the target stitch pitch, determine the adjustment angle based on the target stitch pitch and the reference position information, control the state switching component to switch the stitch pitch adjustment component to the adjustment state, and control the main drive component to drive the first eccentric component and / or the second eccentric component to rotate according to the adjustment angle.

[0006] Preferably, the stitch pitch adjustment assembly further includes a main shaft, the main drive component is connected to the main shaft for transmission, the first eccentric component and the second eccentric component are both disposed on the main shaft, and at least one of the first eccentric component and the second eccentric component can rotate relative to the main shaft to adjust the relative angle between the first eccentric component and the second eccentric component.

[0007] Preferably, the first eccentric component is a stitch pitch adjusting cam, and the second eccentric component is a stop cam. The stitch pitch adjusting cam has a first eccentricity, and the stop cam has a second eccentricity. The combined eccentricity is determined by the first eccentricity, the second eccentricity, and the relative angle between the stitch pitch adjusting cam and the stop cam.

[0008] Preferably, the stitch length adjustment device further includes a stop member, which has a locking position that engages with the stop cam and a release position that disengages from the engagement; when the stop member is in the locking position, the stitch length adjustment assembly is in the locking state; when the stop member is in the release position, the stitch length adjustment assembly is in the adjustment state.

[0009] Preferably, the stitch length adjusting cam is provided with an adjusting groove, and the state switching component includes an insert and a switching drive. The switching drive is convexly connected to the insert and is used to drive the insert to insert into or retract from the adjusting groove. When the insert is inserted into the adjusting groove, the insert pushes the stop to move to the release position, thereby disengaging the stop from the stop cam and switching the stitch length adjusting component to the adjusting state. When the insert retracts from the adjusting groove, the stop re-engages with the stop cam and switches the stitch length adjusting component to the locking state.

[0010] Preferably, the stitch pitch adjustment device further includes a reset member connected between the stop member and the stitch pitch adjustment cam, which is used to drive the stop member to reset after the insert member exits the adjustment groove, so that the stop member and the stop cam are re-engaged.

[0011] Preferably, the positioning component includes a position sensor and a positioning mark disposed on the needle spacing adjustment component. The position sensor is used to detect the position of the positioning mark in order to obtain the reference position information.

[0012] Preferably, the control component is configured to determine the adjustment angle according to a preset correspondence or the following relationship: ; ; Where S is the target needle distance. The eccentricity of the first eccentric component is... The eccentricity of the second eccentric component. The initial angle corresponding to the reference position information. Let θ be the target relative angle, and θ be the adjustment angle.

[0013] Accordingly, the technical solution of the present invention also provides a control method for a stitch pitch adjustment device, applied to any of the stitch pitch adjustment devices described above, the control method comprising: Receive target pin distance; Obtain the reference position information of the stitch length adjustment component, and determine the initial angle based on the reference position information; The adjustment angle is determined based on the target needle distance and the initial angle; The control state switching component switches the needle pitch adjustment component to the adjustment state; The main drive unit is controlled to rotate the first eccentric component and / or the second eccentric component according to the adjusted rotation angle; The state switching component is controlled to switch the needle pitch adjustment component to the locked state.

[0014] Preferably, controlling the main drive component to rotate the first eccentric component and / or the second eccentric component according to the adjusted rotation angle includes: When the adjustment angle is greater than zero, the main drive component is controlled to rotate along the first direction; When the adjustment angle is less than zero, the main drive component is controlled to rotate in the second direction; After the main drive component completes its rotation according to the adjustment angle, the state switching component is controlled to switch the stitch pitch adjustment component to the locked state. The updated initial angle is determined based on the initial angle and the adjustment angle, and the updated initial angle is used as the initial angle for the next stitch pitch adjustment.

[0015] Compared to the aforementioned background technology, the stitch length adjustment device provided by this invention has the following beneficial effects: The combined eccentricity of the stitch length adjustment assembly can be changed by adjusting the relative angle between the first and second eccentric components; the adjustment action is achieved by replacing manual rotation operation through a main drive component connected to the stitch length adjustment assembly; the positioning component can obtain the reference position information of the stitch length adjustment assembly, allowing the control component to determine the adjustment angle based on the target stitch length and the reference position information; the state switching component allows the stitch length adjustment assembly to switch between a locked state and an adjustment state, enabling the first and second eccentric components to rotate relative to each other during adjustment, thus automatically completing the stitch length adjustment according to the target stitch length. This reduces the impact of repeated manual positioning and rotation operations on the stitch length setting result, improves the accuracy and consistency of stitch length adjustment, increases the debugging efficiency of sewing equipment, and reduces wear caused by frequent manual engagement adjustments. Furthermore, during the non-adjustment phase, the relative angle between the first and second eccentric components remains unchanged, maintaining the stability of the combined eccentricity of the stitch length adjustment assembly, thereby reducing the risk of stitch length drift during sewing and improving the adjustment stability of the sewing equipment. The control method of the needle spacing adjustment device used in this invention also has the above-mentioned beneficial effects. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the needle spacing adjustment device provided in an embodiment of the present invention; Figure 2 This is a plan view of the needle spacing adjustment device provided in an embodiment of the present invention; Figure 3 for Figure 2 A partial cross-sectional schematic diagram of the needle spacing adjustment component at point AA; Figure 4 This is an exploded view of the needle spacing adjustment assembly provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the planar coordinate distribution of the needle spacing adjustment component provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 100-Pitch adjustment device; 110-Pitch adjustment assembly; 111-First eccentric component; 1111-Adjustment groove; 1112-Positioning groove; 1113-First positioning hole; 112-Second eccentric component; 1121-Second arc-shaped rack; 113-Main shaft; 120-Main drive component; 130-Position sensor; 140-State switching assembly; 141-Insert component; 142-Switching drive component; 150-Stop component; 151-Second positioning hole; 152-First arc-shaped rack; 160-Reset component; 170-Feeding connecting rod; 180-Fixed seat. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The stitch length adjustment device provided by this invention can be applied to wrist-worn sewing machines or other sewing equipment to automatically adjust the stitch length according to different fabrics, thicknesses, or sewing process requirements. Existing purely mechanical stitch length adjustment schemes typically require the operator to insert the stitch length adjustment pin into the limit slot and simultaneously rotate the main shaft 113 handwheel. The stitch length setting result is easily affected by the operator's skill level, rotation angle, and positioning status. Long-term high-frequency adjustment can also easily cause wear on the meshing parts. This invention combines eccentric component relative angle adjustment, reference position detection, state switching, and main drive component 120° rotation control to enable the stitch length to be automatically adjusted according to the target stitch length and to remain locked after adjustment. It is suitable for multi-layer thick material overlapping sewing or small-scale quick-response style change and debugging applications.

[0021] like Figure 1 , Figure 2 and Figure 3As shown, to achieve the above objectives, the present invention provides a stitch pitch adjustment device, comprising: a stitch pitch adjustment assembly 110, including a first eccentric member 111 and a second eccentric member 112, wherein the first eccentric member 111 and the second eccentric member 112 are rotatably arranged relative to each other around the same rotation axis, so as to change the combined eccentricity of the stitch pitch adjustment assembly 110 by changing the relative angle between the first eccentric member 111 and the second eccentric member 112; a main drive member 120, which is pulsatorically connected to the stitch pitch adjustment assembly 110, for driving the first eccentric member 111 and / or the second eccentric member 112 to rotate; a positioning assembly, for acquiring the reference position information of the stitch pitch adjustment assembly 110; and a state switching assembly 140, which cooperates with the stitch pitch adjustment assembly 110. This component is used to switch the stitch length adjustment assembly 110 between a locked state and an adjustable state. In the locked state, the relative angle between the first eccentric member 111 and the second eccentric member 112 remains unchanged. In the adjustable state, the first eccentric member 111 and the second eccentric member 112 can rotate relative to each other. A control assembly is also included, signal-connected to the main drive assembly 120, the positioning assembly, and the state switching assembly 140. The control assembly is configured to receive the target stitch length, determine the adjustment angle based on the target stitch length and reference position information, control the state switching assembly 140 to switch the stitch length adjustment assembly 110 to the adjustable state, and control the main drive assembly 120 to drive the first eccentric member 111 and / or the second eccentric member 112 to rotate according to the adjustment angle. Specifically, the control assembly includes a controller. The target stitch length can be input from the operation panel or issued by the process parameter program of the sewing equipment. The control assembly receives the target stitch length through a communication interface. The first eccentric component 111 is rotatably mounted in the fixed seat 180 at one end of the feeding link 170. The fixed seat 180 is slidably connected to the feeding link 170, which is connected to the feed dog. The second eccentric component 112 is driven by the main drive component 120. The first eccentric component 111 and the second eccentric component 112 form a superimposed eccentric structure. When the relative angle between the first eccentric component 111 and the second eccentric component 112 changes, the combined eccentricity output by the stitch length adjustment component 110 to the feed mechanism changes accordingly. The main drive component 120 drives the stitch length adjustment component 110 to rotate one revolution, and the displacement of the feed dog reciprocating through the feeding link 170 changes accordingly. Thus, the horizontal feed amount of the feed dog is changed through the feeding link 170, thereby realizing stitch length adjustment. The main drive component 120 can receive drive commands output by the control component and execute the corresponding rotation angle. The positioning component is used to determine the current reference position of the stitch pitch adjustment component 110. The state switching component 140 is used to release the locking relationship between eccentric components or between eccentric components and the stop structure before adjustment, and to restore the locking relationship after adjustment. The entire stitch pitch adjustment process no longer relies on repeated manual locking and rotating operations, reducing human error and improving the consistency and debugging efficiency of stitch pitch adjustment.

[0022] In some embodiments of the present invention, the needle pitch adjustment assembly 110 further includes a main shaft 113, a main drive 120 being drivenly connected to the main shaft 113, and a first eccentric member 111 and a second eccentric member 112 both disposed on the main shaft 113. At least one of the first eccentric member 111 and the second eccentric member 112 is rotatable relative to the main shaft 113 to adjust the relative angle between the first eccentric member 111 and the second eccentric member 112. Specifically, the main drive 120 is a motor for the main shaft 113, capable of directly driving the main shaft 113 to rotate. The second eccentric member 112 is linked to the main shaft 113, while the first eccentric member 111 rotates relative to the main shaft 113 in the adjusted state and rotates synchronously with the main shaft 113 in the locked state. The main shaft 113 serves as a common mounting base for the first eccentric member 111 and the second eccentric member 112, allowing them to be arranged around the same rotation axis, facilitating angle adjustment of the eccentric members through the rotational output of the main drive 120.

[0023] In some embodiments, the first eccentric element 111 is a stitch pitch adjusting cam, and the second eccentric element 112 is a stop cam. The stitch pitch adjusting cam has a first eccentricity, and the stop cam has a second eccentricity. The combined eccentricity is determined by the first eccentricity, the second eccentricity, and the relative angle between the stitch pitch adjusting cam and the stop cam. Specifically, the stitch pitch adjusting cam has an outer circle center and an inner eccentricity center, and the stop cam has a corresponding eccentricity center. When the relative angle between the stitch pitch adjusting cam and the stop cam changes, the vector superposition result of the first eccentricity and the second eccentricity changes accordingly, causing the combined eccentricity to increase or decrease. The combined eccentricity is a key parameter affecting the horizontal feed amount of the feed dog. A larger combined eccentricity corresponds to a larger stitch pitch output, and a smaller combined eccentricity corresponds to a smaller stitch pitch output. By converting stitch pitch adjustment into relative angle control between the two first eccentric elements 111 and the second eccentric element 112, the control component calculates or matches the corresponding adjustment angle based on the target stitch pitch, thereby achieving automated stitch pitch setting.

[0024] like Figure 1 and Figure 4As shown, in some embodiments of the present invention, the stitch length adjustment device 100 further includes a stop 150, which has a locking position that engages with a stop cam and a releasing position that disengages. When the stop 150 is in the locking position, the stitch length adjustment assembly 110 is in a locked state; when the stop 150 is in the releasing position, the stitch length adjustment assembly 110 is in an adjusting state. Specifically, a first arc-shaped rack 152 facing the stop cam is integrally provided on one side of the stop 150, and a second arc-shaped rack 1121 adapted to the first arc-shaped rack 152 is integrally provided on the circumferential outer side of the stop cam. When the sewing equipment is working normally, locking is achieved by the engagement of the first arc-shaped rack 152 and the second arc-shaped rack 1121, so that the relative angle between the stitch length adjustment cam and the stop cam remains stable, thereby maintaining a stable fabric feed. When stitch length adjustment is required, the stop 150 moves to the release position, and the first arc-shaped rack 152 and the second arc-shaped rack 1121 separate from each other, thereby disengaging the stop 150 from the stop cam and allowing the stitch length adjustment cam and the stop cam to rotate relative to each other. By setting the locking and release positions, the overall stitch length adjustment device 100 balances the adjustability of the adjustment stage and the stability of the sewing stage, reducing the risk of stitch length drift caused by vibration or load changes during sewing.

[0025] In some embodiments of the present invention, the stitch pitch adjusting cam is provided with an adjusting groove 1111, and the state switching assembly 140 includes an insert 141 and a switching drive 142. The switching drive 142 is convexly connected to the insert 141 and is used to drive the insert 141 to insert into or exit the adjusting groove 1111. When the insert 141 is inserted into the adjusting groove 1111, the insert 141 pushes the stop 150 to move to the release position, so that the stop 150 is disengaged from the stop cam, thereby switching the stitch pitch adjusting assembly 110 to the adjusting state. When the insert 141 exits the adjusting groove 1111, the stop 150 re-engages with the stop cam, thereby switching the stitch pitch adjusting assembly 110 to the locking state. Specifically, the adjusting groove 1111 serves as a positioning and mating part of the insert 141. The switching drive component 142 drives the insert 141 into the adjustment groove 1111. After entering the adjustment groove 1111, the insert 141 pushes the stop 150, causing the stop 150 to move away from the stop cam and disengage. After the stitch pitch adjustment is completed, the switching drive component 142 drives the insert 141 out of the adjustment groove 1111, and the stop 150 moves back towards the stop cam and re-engages. The switching drive component 142 is a cylinder or motor-driven linkage, and the insert 141 is a pin or push rod. Through the cooperation between the insert 141 and the adjustment groove 1111, the state switching action has a clear mechanical positioning basis, while reducing wear caused by repeated manual pin and slot engagement.

[0026] like Figure 4As shown, in some embodiments, the stitch pitch adjustment device 100 further includes a reset member 160, which is connected between the stop member 150 and the stitch pitch adjustment cam. The reset member 160 is used to reset the stop member 150 after the insert member 141 exits the adjustment groove 1111. Specifically, the reset member 160 is a torsion spring, which is sleeved on a pin on one side of the stitch pitch adjustment cam. One end of the torsion spring is inserted into a first positioning hole 1113 on one side of the stitch pitch adjustment cam, and the other end is inserted into a second positioning hole 151 on one side of the stop member 150. When the insert member 141 exits the adjustment groove 1111, the reset member 160 applies a reset force to the stop member 150, causing the stop member 150 to move towards the stop cam and re-engage with it. Furthermore, the reset member 160 prevents the locking action from relying entirely on the active push of the switching drive member 142, improving the reliability of the locking recovery.

[0027] It should be noted that during long-term operation or frequent model changes and adjustments of the sewing equipment, the reset component 160 ensures that the stitch length adjustment component 110 returns to the locked state stably after each adjustment, reducing the possibility of fabric feed deviation due to incomplete engagement.

[0028] In some embodiments of the present invention, the positioning component includes a position sensor 130 and a positioning mark disposed on the stitch pitch adjustment component 110. The position sensor 130 is used to detect the position of the positioning mark to obtain reference position information. Specifically, the position sensor 130 is mounted on the switching drive component 142, and the positioning mark is a positioning groove 1112 disposed on the stitch pitch adjustment cam. The positioning groove 1112 is formed in the circumferential sidewall of the first eccentric component 111. When the position sensor 130 detects that the positioning mark has reached a predetermined position, it sends a detection signal to the control component, which then determines the current angle of the main drive component 120 as the initial angle. After the position sensor 130 identifies the reference position, the control component can use a clear mechanical position as the starting point for calculation, reducing the cumulative error caused by inaccurate initial position during the adjustment process. For different machine models or different installation spaces, the position sensor 130 can be a proximity switch or a photoelectric sensor, allowing for flexible arrangement according to the actual structure.

[0029] like Figure 3 and Figure 5 As shown, it should be noted that the control component is configured to determine the adjustment angle based on a preset correspondence or the following relationship: ; Where S is the target needle distance. This refers to the eccentricity of the first eccentric component 111, also known as the first eccentricity. This refers to the eccentricity of the second eccentric component 112, also known as the second eccentricity. The initial angle corresponding to the reference position information. Let θ be the target relative angle, and θ be the adjustment angle. Specifically, the first eccentricity of the needle pitch adjusting cam and the second eccentricity of the stop cam are taken as known structural parameters, and the target needle pitch input by the user is taken as the target parameter. The required adjustment angle is calculated by combining this with the initial angle corresponding to the current position. The formula is as follows: according to The conversion shows that in this embodiment, the target stitch length S and the combined eccentricity e satisfy S = 2e. Of course, in other embodiments, the two can also establish a correspondence based on the transmission ratio or the parameters of the feeding mechanism. The control component can also pre-store a parameter table between the target stitch length and the adjustment angle, and directly call the corresponding adjustment angle after the target stitch length is input. When using the calculation relationship, the target stitch length can be continuously matched; when using the preset correspondence relationship, the amount of control calculation can be reduced and the response speed can be improved. Both methods can make the main drive component 120 perform adjustment according to a specific angle, so as to avoid manual estimation and repeated trial and error, thereby improving the debugging efficiency.

[0030] In this embodiment, the target relative angle refers to the target angle that needs to be formed between the eccentric directions of the first eccentric component and the second eccentric component under the combined eccentricity corresponding to the target stitch pitch. The initial angle refers to the current relative angle between the first and second eccentric components when the positioning component acquires the reference position information. The adjustment angle refers to the rotation angle that the main drive component needs to output during this stitch pitch adjustment process. The adjustment angle can be determined by the difference between the target relative angle and the initial angle. The target relative angle is used to characterize the final angular state corresponding to the target stitch pitch, and the adjustment angle is used to characterize the amount of rotation required to adjust from the current angular state to the final angular state.

[0031] In some embodiments of the present invention, a control method for a stitch length adjustment device is applied to the stitch length adjustment device 100. The control method includes: receiving a target stitch length; acquiring reference position information of the stitch length adjustment component 110 and determining an initial angle based on the reference position information; determining an adjustment angle based on the target stitch length and the initial angle; controlling a state switching component 140 to switch the stitch length adjustment component 110 to an adjustment state; controlling the main drive component 120 to rotate the first eccentric component 111 and / or the second eccentric component 112 according to the adjustment angle; and controlling the state switching component 140 to switch the stitch length adjustment component 110 to a locked state. Specifically, after the target stitch length is input through the operation panel and the control component receives the target stitch length, it controls the main drive component 120 to rotate along the working direction, causing the positioning component to detect the positioning mark on the stitch length adjustment component 110. When the positioning component detects the positioning mark, the control component takes the angle of the main drive component 120 at this time as the initial angle and controls the state switching component 140 to enter the adjustment action, causing the stop component 150 to disengage from the stop cam. Subsequently, the control component adjusts the rotation angle based on the target stitch length and initial angle, driving the main drive component 120 to rotate by the corresponding angle, so that the relative angle between the first eccentric component 111 and the second eccentric component 112 reaches the target state. After adjustment, the control component resets the control state switching component 140, causing the stop component 150 to re-engage with the stop cam, and the stitch length adjustment component 110 re-enters the locked state. Only the target stitch length needs to be input to complete one automatic adjustment, reducing the time for repeated manual adjustments by the machinist and adapting to the processing needs of frequent product changes.

[0032] In some embodiments of the present invention, controlling the main drive member 120 to rotate the first eccentric member 111 and / or the second eccentric member 112 according to the adjustment angle includes: when the adjustment angle is greater than zero, controlling the main drive member 120 to rotate along a first direction; when the adjustment angle is less than zero, controlling the main drive member 120 to rotate along a second direction; after the main drive member 120 has rotated according to the adjustment angle, the control state switching component 140 switches the stitch pitch adjustment component 110 to a locked state, determines an updated initial angle according to the initial angle and the adjustment angle, and uses the updated initial angle as the initial angle for the next stitch pitch adjustment. Specifically, the first direction corresponds to the direction of increasing stitch pitch, and the second direction corresponds to the direction of decreasing stitch pitch; alternatively, the first direction can be set as the direction of decreasing stitch pitch and the second direction as the direction of increasing stitch pitch according to the specific transmission structure. After obtaining the adjustment angle, the control component determines the sign of the adjustment angle and controls the main drive member 120 to rotate in the forward or reverse direction, so that the stitch pitch adjustment component 110 is adjusted from the current combined eccentricity to the target combined eccentricity. After the main drive unit 120 completes its rotation, the control component uses the target relative angle as the initial angle for the next stitch pitch adjustment, enabling subsequent stitch pitch adjustments to continue calculations based on the latest state and reducing the cumulative error between multiple adjustments. After adjustment, the switching drive unit 142 receives a reset signal and drives the insert 141 out of the adjustment slot 1111. The reset unit 160 causes the stop 150 to re-engage with the stop cam, thus ending the stitch pitch adjustment process.

[0033] The working principle of this invention is as follows: When the user inputs the target stitch length, the control component receives the stitch length adjustment signal and controls the main drive component 120 to drive the stitch length adjustment component 110 to rotate; the positioning component detects the positioning mark on the stitch length adjustment component 110 and takes the angle of the main drive component 120 when the positioning mark is detected as the initial angle; after receiving the adjustment signal, the state switching component 140 causes the insert 141 to insert into the adjustment slot 1111 and disengages the stop 150 from the stop cam; the control component calculates the adjustment angle based on the target stitch length, the eccentricity of the first eccentric component 111, the eccentricity of the second eccentric component 112, and the initial angle; when the adjustment angle is positive, the main drive component 120 rotates along the first direction, and when the adjustment angle is negative, the main drive component 120 rotates along the second direction; after the main drive component 120 has rotated, the control component updates the initial angle and controls the state switching component 140 to reset, so that the stop 150 and the stop cam are re-engaged, and the stitch length adjustment component 110 enters the locked state.

[0034] In summary, by switching the state of the state switching component 140 between the locked state and the adjustment state, the stitch length adjustment component 110 allows the first eccentric member 111 and the second eccentric member 112 to rotate relative to each other during adjustment, so as to automatically complete the stitch length adjustment according to the target stitch length, reduce the impact of repeated manual positioning and rotation operations on the stitch length setting results, improve the accuracy and consistency of stitch length adjustment, improve the debugging efficiency of sewing equipment, and reduce wear caused by frequent manual engagement adjustment.

[0035] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0036] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A needle spacing adjustment device, characterized in that, include: The stitch length adjustment assembly (110) includes a first eccentric member (111) and a second eccentric member (112). The first eccentric member (111) and the second eccentric member (112) are rotatably arranged relative to each other about the same rotation axis so as to change the combined eccentricity of the stitch length adjustment assembly (110) by changing the relative angle between the first eccentric member (111) and the second eccentric member (112). The main drive unit (120) is connected to the needle pitch adjustment assembly (110) for driving the first eccentric member (111) and / or the second eccentric member (112) to rotate; A positioning component is used to obtain the reference position information of the needle pitch adjustment component (110); A state switching component (140) cooperates with the stitch pitch adjustment component (110) to switch the stitch pitch adjustment component (110) between a locked state and an adjustment state. In the locked state, the relative angle between the first eccentric member (111) and the second eccentric member (112) remains unchanged. In the adjustment state, the first eccentric member (111) and the second eccentric member (112) can rotate relative to each other. as well as The control component is signal-connected to the main drive (120), the positioning component, and the state switching component (140), respectively. The control component is configured to receive the target stitch pitch, determine the adjustment angle according to the target stitch pitch and the reference position information, control the state switching component (140) to switch the stitch pitch adjustment component (110) to the adjustment state, and control the main drive (120) to drive the first eccentric component (111) and / or the second eccentric component (112) to rotate according to the adjustment angle.

2. The gauge adjustment device of claim 1, wherein, The stitch length adjustment assembly (110) further includes a main shaft (113), the main drive (120) is connected to the main shaft (113) for transmission, the first eccentric member (111) and the second eccentric member (112) are both disposed on the main shaft (113), and at least one of the first eccentric member (111) and the second eccentric member (112) can rotate relative to the main shaft (113) to adjust the relative angle between the first eccentric member (111) and the second eccentric member (112).

3. The gauge adjustment device of claim 2, wherein, The first eccentric component (111) is a stitch pitch adjusting cam, and the second eccentric component (112) is a stop cam. The stitch pitch adjusting cam has a first eccentricity, and the stop cam has a second eccentricity. The combined eccentricity is determined by the first eccentricity, the second eccentricity, and the relative angle between the stitch pitch adjusting cam and the stop cam.

4. The needle spacing adjustment device according to claim 3, characterized in that, The stitch length adjustment device (100) further includes a stop (150), which has a locking position that engages with the stop cam and a release position that disengages from the engagement; when the stop (150) is in the locking position, the stitch length adjustment assembly (110) is in the locking state; when the stop (150) is in the release position, the stitch length adjustment assembly (110) is in the adjustment state.

5. The gauge adjustment device of claim 4, wherein, The stitch length adjustment cam is provided with an adjustment groove (1111). The state switching component (140) includes an insert (141) and a switching drive (142). The switching drive (142) is connected to the insert (141) and is used to drive the insert (141) to insert into or exit the adjustment groove (1111). When the insert (141) is inserted into the adjustment groove (1111), the insert (141) pushes the stop (150) to move to the release position, so that the stop (150) is disengaged from the stop cam, thereby switching the stitch length adjustment component (110) to the adjustment state. When the insert (141) exits the adjustment groove (1111), the stop (150) is re-engaged from the stop cam, thereby switching the stitch length adjustment component (110) to the locking state.

6. The gauge adjustment device of claim 5, wherein, The stitch length adjustment device (100) further includes a reset member (160), which is connected between the stop member (150) and the stitch length adjustment cam. The reset member (160) is used to drive the stop member (150) to reset after the insert member (141) exits the adjustment groove (1111), so that the stop member (150) and the stop cam are re-engaged.

7. The gauge adjustment device of any one of claims 1 to 6, wherein, The positioning component includes a position sensor (130) and a positioning mark disposed on the needle spacing adjustment component (110). The position sensor (130) is used to detect the position of the positioning mark in order to obtain the reference position information.

8. The gauge adjustment device of any one of claims 1 to 7, wherein, The control component is configured to determine the adjustment angle based on a preset correspondence or the following relationship: ； ； Where S is the target needle distance. The eccentricity of the first eccentric component (111) is... The eccentricity of the second eccentric component (112) is... The initial angle corresponding to the reference position information. Let θ be the target relative angle, and θ be the adjustment angle.

9. A control method of a gauge adjusting device, characterized by, The control method, applied to the stitch spacing adjustment device as described in any one of claims 1 to 8, comprises: Receive target pin distance; Obtain the reference position information of the needle spacing adjustment component (110), and determine the initial angle based on the reference position information; The adjustment angle is determined based on the target needle distance and the initial angle; The control state switching component (140) switches the needle pitch adjustment component (110) to the adjustment state; The main drive unit (120) is controlled to drive the first eccentric member (111) and / or the second eccentric member (112) to rotate according to the adjusted rotation angle; The state switching component (140) is controlled to switch the needle pitch adjustment component (110) to the locked state.

10. The control method for the needle spacing adjustment device according to claim 9, characterized in that, Controlling the main drive unit (120) to drive the first eccentric member (111) and / or the second eccentric member (112) to rotate according to the adjusted rotation angle includes: When the adjustment angle is greater than zero, the main drive unit (120) is controlled to rotate in the first direction; When the adjustment angle is less than zero, the main drive unit (120) is controlled to rotate in the second direction; After the main drive unit (120) completes its rotation according to the adjustment angle, the state switching component (140) is controlled to switch the stitch length adjustment component (110) to the locked state, and the updated initial angle is determined according to the initial angle and the adjustment angle, and the updated initial angle is used as the initial angle for the next stitch length adjustment.

Images