Separable twin needle sewing machine

Abstract

The present application relates to a detachable double needle sewing machine, which comprises a frame, a first needle bar, a second needle bar, a needle bar clamping mechanism, a stop mechanism and a clutch mechanism arranged on the frame, and a rotating shuttle arranged on the frame, wherein the stop mechanism can be engaged with the needle bar clamping mechanism; the first needle bar and the second needle bar are both movable on the frame and are arranged in parallel on the same side of the rotating shuttle in the radial direction of the rotating shuttle; and the clutch mechanism can release the engagement between the stop mechanism and the needle bar clamping mechanism, so that the needle bar clamping mechanism can be engaged with the first needle bar and / or the second needle bar. The detachable double needle sewing machine provided by the present application can realize the mutual switching between the first needle bar and the second needle bar through the needle bar clamping mechanism, the stop mechanism and the clutch mechanism, the first needle bar and the second needle bar can share the same rotating shuttle for thread hooking operation, the sewing process is simple, and the sewing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of sewing equipment technology, and in particular to a detachable double-needle sewing machine. Background Technology

[0002] In the sewing of shoe uppers and other footwear processes using roller sewing machines, different colored threads are often used to enhance the appearance of the shoes. However, because existing conventional roller sewing machines typically have only a single needle bar or two needles sharing one needle bar, users usually use two roller sewing machines when two colors of thread need to be used consecutively in a single process. This method increases machine purchase costs, complicates the process, increases labor intensity, and severely impacts sewing efficiency. Summary of the Invention

[0003] Therefore, it is necessary to provide a detachable double-needle sewing machine to address the problem that the double-needle sewing process requires the simultaneous use of two rollers for switching between the two needles, which increases the machine purchase cost and affects sewing efficiency.

[0004] A detachable double-needle sewing machine includes a frame and a first needle bar, a second needle bar, a needle bar clamping mechanism, a stop mechanism, and a clutch mechanism disposed on the frame. A rotary hook is disposed on the frame, and the stop mechanism is capable of engaging with the needle bar clamping mechanism.

[0005] Both the first needle bar and the second needle bar are movable on the frame and are spaced apart directly above the rotary hook. In the radial direction of the rotary hook, the first needle bar and the second needle bar are arranged side by side on the same side of the rotary hook.

[0006] The clutch mechanism can release the engagement between the stop mechanism and the needle bar clamping mechanism, allowing the needle bar clamping mechanism to engage with the first needle bar and / or the second needle bar.

[0007] The aforementioned detachable double-needle sewing machine, when the clutch mechanism disengages from the stop mechanism and the needle bar clamping mechanism, and the needle bar clamping mechanism engages with the first needle bar, drives the first needle bar to move on the frame, performing sewing during the needle drop process. Alternatively, when the needle bar clamping mechanism engages with the second needle bar, it drives the second needle bar to move on the frame, performing sewing during the needle drop process. The needle bar clamping mechanism, stop mechanism, and clutch mechanism enable switching between the first and second needle bars to sew two different colored threads on the fabric. Furthermore, the first and second needle bars are arranged side-by-side on the same side of the rotary hook, allowing them to share the same rotary hook for thread hooking. Only one roller is needed to complete the double-needle switching sewing operation, and no reciprocating needle movement is required during the switching process, simplifying the sewing process and significantly improving sewing efficiency.

[0008] In one embodiment, the needle bar clamping mechanism includes a first needle bar clamping assembly, a second needle bar clamping assembly, and a first pin, wherein the first pin is fixed to the frame, wherein:

[0009] The first needle bar clamp assembly includes a first elastic element, a first clutch lever, and a first anti-sway block. The middle part of the first clutch lever is hinged to the first pin. One end of the first clutch lever abuts against the first elastic element, and the other end is hinged to the first anti-sway block. The first anti-sway block can be engaged with the first needle bar.

[0010] The second needle bar clamp assembly includes a second elastic element, a second clutch lever, and a second anti-sway block. The middle part of the second clutch lever is also hinged to the first pin. One end of the second clutch lever abuts against the second elastic element, and the other end is hinged to the second anti-sway block. The second anti-sway block can be engaged with the second needle bar.

[0011] The stop mechanism is engaged with the first anti-sway block and / or the second anti-sway block.

[0012] In one embodiment, the stopping mechanism includes a stopping bracket, a first stopping rod, a third elastic element, a second stopping rod, a fourth elastic element, and a second pin. The stopping bracket is fixed to the needle bar clamping mechanism, and the second pin is fixed to the needle bar clamping mechanism.

[0013] One end of the first stop rod is hinged to the second pin, and the other end can be engaged with the first anti-sway block. One end of the third elastic member abuts against the end of the first stop rod away from the second pin, and the other end is fixed to the stop bracket.

[0014] One end of the second stop rod is hinged to the second pin, and the other end can be engaged with the second anti-sway block. One end of the fourth elastic member abuts against the end of the second stop rod away from the second pin, and the other end is fixed to the stop bracket.

[0015] In one embodiment, the clutch mechanism includes a first retaining pin and a second retaining pin, both of which are provided with a fifth elastic element, and both the first needle bar and the second needle bar are hinged with levers.

[0016] The first needle bar has a first groove and a second groove along its extension direction, and the openings of the first groove and the second groove are both facing the needle bar clamping mechanism. The first groove is located at one end close to the rotary hook. The first anti-sway block can be engaged in the first groove, and the first retaining pin can be engaged in the second groove.

[0017] The second needle bar has a third groove and a fourth groove along its extension direction, and the openings of the third groove and the fourth groove are both facing the needle bar clamping mechanism. The third groove is located at one end close to the rotary hook. The second anti-sway block can be engaged in the third groove, and the second retaining pin can be engaged in the fourth groove.

[0018] One end of the lever is located in the first groove and the third groove, and the other end is located in the second groove and the fourth groove.

[0019] In one embodiment, the clutch mechanism further includes a first clutch pin and a second clutch pin, both of which are fitted with a sixth elastic element. The first clutch pin is movable in the extension direction of the first needle bar and can abut against the first stop rod. The second clutch pin is movable in the extension direction of the second needle bar and can abut against the second stop rod.

[0020] In one embodiment, a sliding mechanism is further included, which is detachably fixed to the frame and movable along the parallel direction of the first needle bar and the second needle bar. The sliding mechanism can abut against the needle bar clamping mechanism and / or the clutch mechanism.

[0021] In one embodiment, the sliding mechanism includes a first driving source, a seventh elastic element, and a slider. The first driving source is fixed to the frame, one end of the seventh elastic element is connected to the output end of the first driving source, and the other end is connected to the slider.

[0022] In one embodiment, the slider has two spaced protrusions on the side facing the needle bar clamping mechanism, and the two protrusions can simultaneously abut against the first clutch lever and the second clutch pin, or the second clutch lever and the first clutch pin.

[0023] In one embodiment, the slider has a protrusion on the side facing the needle bar clamping mechanism, the protrusion being able to abut against the first clutch lever or the second clutch lever alone, or simultaneously against the first clutch pin and the second clutch pin.

[0024] In one embodiment, a swing mechanism is further included. The swing mechanism includes a second drive source, a swing shaft, and a needle bar swing frame. The second drive source is fixed to the frame. The output end of the second drive source is connected to one end of the swing shaft via a connecting rod. The other end of the swing shaft is fixed to the needle bar swing frame. A sliding groove is provided in the needle bar swing frame. A sliding member is provided in the sliding groove. The sliding member can slide along the extension direction of the first needle bar in the sliding groove. The sliding member is fixed to the needle bar clamping mechanism. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the detachable double-needle sewing machine provided by the present invention;

[0026] Figure 2 This is a structural schematic diagram of the detachable double-needle sewing machine provided by the present invention from another perspective.

[0027] Figure 3 A schematic diagram of the modular structure consisting of the first needle bar, the second needle bar, the needle bar clamping mechanism, the stop mechanism, and the clutch mechanism;

[0028] Figure 4 An exploded view of the first needle bar, the first retaining pin, and the first anti-sway block;

[0029] Figure 5 This is a structural diagram of a module consisting of a sliding mechanism, a needle bar clamping mechanism, a stop mechanism, and a clutch mechanism in one preferred embodiment.

[0030] Figure 6 This is a structural diagram of a module consisting of a sliding mechanism, a needle bar clamping mechanism, a stop mechanism, and a clutch mechanism in another preferred embodiment.

[0031] Figure 7 This is a schematic diagram of the sliding mechanism provided by the present invention.

[0032] Figure label:

[0033] 100. Double-needle sewing machine;

[0034] 110. Rotary shuttle;

[0035] 120. First needle bar; 121. First groove; 122. Second groove;

[0036] 130. Second needle bar; 131. Third groove; 132. Fourth groove;

[0037] 140. Needle bar clamping mechanism; 141. First needle bar clamping assembly; 1411. First elastic element; 1412. First clutch lever; 1413. First anti-sway block; 142. Second needle bar clamping assembly; 1421. Second elastic element; 1422. Second clutch lever; 1423. Second anti-sway block; 143. First pin;

[0038] 150. Stopping mechanism; 151. Stopping bracket; 152. First stop rod; 153. Third elastic element; 154. Second stop rod; 155. Fourth elastic element; 156. Second pin;

[0039] 160. Clutch mechanism; 161. First retaining pin; 162. Second retaining pin; 163. Fifth elastic element; 164. Lever; 165. First clutch pin; 166. Second clutch pin;

[0040] 170. Sliding mechanism; 171. First drive source; 172. Seventh elastic element; 173. Slider; 1731. Protrusion; 1732. Guide pin; 174. Guide plate; 1741. Through groove; 175. Eighth elastic element;

[0041] 180. Swinging mechanism; 181. Second drive source; 182. Swinging shaft; 183. Needle bar swing frame; 1831. Sliding groove; 1832. Sliding component; 184. Connecting rod. Detailed Implementation

[0042] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0048] The technical solutions provided by the embodiments of the present invention are described below with reference to the accompanying drawings.

[0049] like Figure 1 and Figure 2 As shown, the present invention provides a detachable double-needle sewing machine 100. The detachable double-needle sewing machine 100 includes a frame, a first needle bar 120, a second needle bar 130, a needle bar clamping mechanism 140, a stop mechanism 150, and a clutch mechanism 160. The first needle bar 120, the second needle bar 130, the needle bar clamping mechanism 140, the stop mechanism 150, and the clutch mechanism 160 are all fixed on the frame. A rotary hook 110 is provided on the frame. Specifically, the rotary hook 110 is located below the needle plate, and the needle plate has needle holes. The first needle bar 120 and the second needle bar 130 are each connected to a needle at the end near the rotary hook 110. The needle drives the thread through the needle hole into the hooking plane of the rotary hook 110, and the rotary hook 110 performs hooking operations to form a stitch.

[0050] Both the first needle bar 120 and the second needle bar 130 are movable on the machine frame, and are spaced apart and positioned directly above the rotary hook 110. In the radial direction of the rotary hook 110, the first needle bar 120 and the second needle bar 130 are arranged side-by-side on the same side of the rotary hook 110. Due to the fine internal structure of the rotary hook 110, it has only one hooking starting point. Only when the tip of the rotary hook 110 rotates to or near the hooking starting point can the rotary hook 110 hook the thread on the needle and form a stitch inside the rotary hook 110, thus completing the sewing operation. In other words, the rotary hook 110 can only hook the thread on the needle and form a stitch inside the rotary hook 110 when the tip of the rotary hook 110 rotates to within the allowable range of the hooking start point. For example, in this invention, the distance between the first needle bar 120 and the second needle bar 130 is 4mm, and the vertical distance between the hooking start point of the rotary hook 110 and the first needle bar 120 and the second needle bar 130 is 2mm, to ensure that the same rotary hook 110 can hook the thread on the first needle bar 120 and the thread on the second needle bar 130. Traditionally, the first needle bar and the second needle bar are arranged side by side in the middle of two rotary hooks. In this case, since the distance between the first needle bar and the second needle bar is too far, two rotary hooks need to be set below the first needle bar and the second needle bar respectively. The two rotary hooks hook the thread on the first needle bar and the thread on the second needle bar respectively, or two rollers are used to switch the needle bars to achieve the sewing operation.

[0051] The clutch mechanism 160 can disengage the stop mechanism 150 from the needle bar clamping mechanism 140, allowing the needle bar clamping mechanism 140 to engage with the first needle bar 120 and / or the second needle bar 130. Specifically, when the stop mechanism 150 engages with the needle bar clamping mechanism 140, the needle bar clamping mechanism 140 cannot engage with the first needle bar 120, and the needle bar clamping mechanism 140 and the first needle bar 120 are separated. When the clutch mechanism 160 disengages the stop mechanism 150 from the needle bar clamping mechanism 140, and the needle bar clamping mechanism 140 engages with the first needle bar 120, the needle bar clamping mechanism 140 and the first needle bar 120 are connected and maintained. The needle bar clamping mechanism 140 can drive the first needle bar 120 to move up and down, allowing the first needle bar 120 to perform sewing operations during the needle drop process. Similarly, when the stop mechanism 150 engages with the needle bar clamping mechanism 140, the needle bar clamping mechanism 140 cannot engage with the second needle bar 130, and the needle bar clamping mechanism 140 and the second needle bar 130 are separated from each other; when the clutch mechanism 160 releases the engagement between the stop mechanism 150 and the needle bar clamping mechanism 140, and when the needle bar clamping mechanism 140 engages with the second needle bar 130, the needle bar clamping mechanism 140 and the second needle bar 130 are connected and maintained, and the needle bar clamping mechanism 140 can drive the second needle bar 130 to move up and down, so that the second needle bar 130 performs sewing operations during the needle dropping process.

[0052] The aforementioned detachable double-needle sewing machine 100, when the clutch mechanism 160 disengages from the stop mechanism 150 and the needle bar clamping mechanism 140, and the needle bar clamping mechanism 140 engages with the first needle bar 120, drives the first needle bar 120 to move on the machine frame. The first needle bar 120 performs sewing operations during needle drop. Furthermore, when the needle bar clamping mechanism 140 engages with the second needle bar 130, it drives the second needle bar 130 to move on the machine frame, and the second needle bar 130 performs sewing operations during needle drop. Through the needle bar clamping mechanism 140, the stop mechanism 150, and the clutch mechanism 160, the machine can switch between the first needle bar 120 and the second needle bar 130 to perform sewing operations with two different colored threads on the fabric. Furthermore, the first needle bar 120 and the second needle bar 130 are arranged side by side on the same side of the rotary hook 110. The first needle bar 120 and the second needle bar 130 can share the same rotary hook 110 for thread hooking operations. During the switching process between the first needle bar 120 and the second needle bar 130, there is no need to move the needle back and forth, simplifying the sewing process and significantly improving sewing efficiency.

[0053] To achieve the switching action between the first needle bar 120 and the second needle bar 130, a preferred embodiment is as follows: Figure 1 and Figure 3As shown, the needle bar clamping mechanism 140 includes a first needle bar clamping assembly 141, a second needle bar clamping assembly 142, and a first pin 143. The first pin 143 is fixed to the frame to achieve indirect fixation between the needle bar clamping mechanism 140 and the frame.

[0054] The first needle bar clamp assembly 141 includes a first elastic element 1411, a first clutch lever 1412, and a first anti-sway block 1413. The middle of the first clutch lever 1412 is hinged to a first pin 143. One end of the first clutch lever 1412 abuts against the first elastic element 1411, and the other end is hinged to the first anti-sway block 1413. The first anti-sway block 1413 can engage with the first needle bar 120, thereby engaging the first needle bar clamp assembly 141 with the first needle bar 120. This causes the needle bar clamp mechanism 140 to move the first needle bar 120 up and down, performing a needle dropping operation. The second needle bar clamp assembly 142 includes a second elastic element 1421, a second clutch lever 1422, and a second anti-sway block 1423. The second clutch lever 1422 is hinged at the middle to the first pin 143. One end of the second clutch lever 1422 abuts against the second elastic element 1421, and the other end is hinged to the second anti-sway block 1423. The second anti-sway block 1423 can engage with the second needle bar 130, thereby engaging the second needle bar clamp assembly 142 with the second needle bar 130. This causes the needle bar clamp mechanism 140 to move the second needle bar 130 up and down, performing the needle dropping operation. It should be noted that both the first elastic element 1411 and the second elastic element 1421 are compression springs. Of course, the first elastic element 1411 and the second elastic element 1421 can also be other elements capable of elastic deformation. The present invention does not limit the specific type of the first elastic element 1411 and the second elastic element 1421.

[0055] Furthermore, the stop mechanism 150 is movably engaged with the first anti-sway block 1413 and / or the second anti-sway block 1423. Specifically, when the stop mechanism 150 is engaged with the first anti-sway block 1413, the first needle bar clamp assembly 141 cannot engage with the first needle bar 120, thus separating the needle bar clamp mechanism 140 from the first needle bar 120; when the stop mechanism 150 is disengaged from the first anti-sway block 1413, the first needle bar clamp assembly 141 can engage with the first anti-sway block 1413, thus connecting and maintaining the needle bar clamp mechanism 140 with the first needle bar 120. Similarly, when the stop mechanism 150 engages with the second anti-sway block 1423, the second needle bar clamp assembly 142 cannot engage with the second needle bar 130, thus separating the needle bar clamp mechanism 140 from the second needle bar 130; when the stop mechanism 150 exits the second anti-sway block 1423, the second needle bar clamp assembly 142 can engage with the second anti-sway block 1423, thus connecting and maintaining the needle bar clamp mechanism 140 with the second needle bar 130.

[0056] In the aforementioned separable double-needle sewing machine 100, when the first needle bar 120 is connected and held with the needle bar clamping mechanism 140, the first anti-sway block 1413 engages with the first needle bar 120, enabling the needle bar clamping mechanism 140 to drive the first needle bar 120 to move up and down. When the upper end of the first clutch lever 1412 is pressed, the first clutch lever 1412 rotates around the first pin 143, driving the first anti-sway block 1413 to move in the direction of exiting the first needle bar 120. When the first anti-sway block 1413 exits the first needle bar 120, the stop mechanism 150 can engage with the first anti-sway block 1413, realizing the separation of the first needle bar 120 and the needle bar clamping mechanism 140. When the second needle bar 130 is connected and held with the needle bar clamping mechanism 140, the second anti-sway block 1423 engages with the second needle bar 130, allowing the needle bar clamping mechanism 140 to drive the second needle bar 130 to move up and down. When the upper end of the second clutch lever 1422 is pressed, the second clutch lever 1422 rotates around the first pin 143, causing the second anti-sway block 1423 to move in the direction of exiting the second needle bar 130. When the second anti-sway block 1423 exits the second needle bar 130, the stop mechanism 150 engages with the second anti-sway block 1423, realizing the separation of the second needle bar 130 from the needle bar clamping mechanism 140. The switching action between the first needle bar 120 and the second needle bar 130 is realized by whether the first anti-sway block 1413 engages with the first needle bar 120 and whether the second anti-sway block 1423 engages with the second needle bar 130.

[0057] Specifically, such as Figure 1 and Figure 3As shown, the stopping mechanism 150 includes a stopping bracket 151, a first stopping rod 152, a third elastic element 153, a second stopping rod 154, a fourth elastic element 155, and a second pin 156. The stopping bracket 151 is fixed to the needle bar clamping mechanism 140, and the second pin 156 is fixed to the needle bar clamping mechanism 140. One end of the first stopping rod 152 is hinged to the second pin 156, and the other end of the first stopping rod 152 can be engaged with the first anti-sway block 1413. One end of the third elastic element 153 abuts against the end of the first stopping rod 152 away from the second pin 156, and the other end of the third elastic element 153 is fixed to the stopping bracket 151. When the upper end of the first stopping rod 152 away from the second pin 156 is pressed, the first stopping rod 152 rotates around the second pin 156, and the first stopping rod 152 disengages from the first anti-sway block 1413. Therefore, by applying upward force through the first elastic element 1411, the first clutch lever 1412 rotates around the first pin 143, and the first clutch lever 1412 pushes the first anti-sway block 1413 to move in the direction of engaging the first needle bar 120, so that the first anti-sway block 1413 can be engaged with the first needle bar 120. Similarly, one end of the second stop lever 154 is hinged to the second pin 156, and the other end of the second stop lever 154 can be engaged with the second anti-sway block 1423. One end of the fourth elastic element 155 abuts against the end of the second stop lever 154 away from the second pin 156, and the other end of the fourth elastic element 155 is fixed to the stop bracket 151. When the upper end of the second stop lever 154 away from the second pin 156 is pressed, the second stop lever 154 rotates around the second pin 156, and the second stop lever 154 disengages from the second anti-sway block 1423. Therefore, by applying upward force through the second elastic element 1421, the second clutch lever 1422 rotates around the first pin 143. The second clutch lever 1422 pushes the second anti-sway block 1423 to move in the direction of engaging the second needle rod 130, so that the second anti-sway block 1423 can be engaged with the second needle rod 130. It should be noted that in this embodiment, both the third elastic element 153 and the fourth elastic element 155 are compression springs. Of course, the third elastic element 153 and the fourth elastic element 155 can also be other elements capable of elastic deformation. The present invention does not limit the specific type of the third elastic element 153 and the fourth elastic element 155.

[0058] In order for the first needle bar 120 to be connected to or separated from the needle bar clamping mechanism 140, and for the second needle bar 130 to be connected to or separated from the needle bar clamping mechanism 140, specifically, as follows: Figure 1 , Figure 3 as well as Figure 4As shown, the clutch mechanism 160 includes a first retaining pin 161 and a second retaining pin 162. In the extending direction of the first needle bar 120, the first needle bar 120 has a first groove 121 and a second groove 122. The openings of both the first groove 121 and the second groove 122 face the needle bar clamping mechanism 140, and both the first groove 121 and the second groove 122 extend inwards towards the first needle bar 120. A first anti-sway block 1413 can engage with the first groove 121, and a first retaining pin 161 can engage with the second groove 122. In the extending direction of the second needle bar 130, the second needle bar 130 has a third groove 131 and a fourth groove 132. The openings of both the third groove 131 and the fourth groove 132 face the needle bar clamping mechanism 140, and both the third groove 131 and the fourth groove 132 extend inwards towards the second needle bar 130. The second anti-sway block 1423 can be engaged in the third groove 131, and the second retaining pin 162 can be engaged in the fourth groove 132. Both the first needle bar 120 and the second needle bar 130 have levers 164 hinged inside. One end of the lever 164 inside the first needle bar 120 is located in the first groove 121, and the other end of the lever 164 inside the first needle bar 120 is located in the second groove 122. Similarly, one end of the lever 164 inside the second needle bar 130 is located in the third groove 131, and the other end of the lever 164 inside the second lever 164 is located in the fourth groove 132.

[0059] The specific process by which the first needle bar 120 can be connected to or separated from the needle bar clamping mechanism 140 is as follows: When the first retaining pin 161 is engaged with the second groove 122, the lever 164 inside the first needle bar 120 protrudes from the surface of the first needle bar 120 at one end of the first groove 121, and the needle bar clamping mechanism 140 cannot be engaged with the first needle bar 120, thus separating the needle bar clamping mechanism 140 from the first needle bar 120; when the first anti-sway block 1413 is engaged with the first... When the first needle bar is in groove 121, the needle bar clamping mechanism 140 can engage with the first needle bar 120. The lever 164 inside the first needle bar 120 protrudes from one end of the second groove 122, and the first retaining pin 161 cannot be engaged with the second groove 122. At this time, the needle bar clamping mechanism 140 is connected and held with the first needle bar 120. The needle bar clamping mechanism 140 can drive the first needle bar 120 to move up and down to perform the sewing operation of the first needle bar 120. Similarly, the specific process for enabling the second needle bar 130 to be connected to or separated from the needle bar clamping mechanism 140 is as follows: when the second retaining pin 162 is engaged in the fourth groove 132, the lever 164 inside the second needle bar 130 protrudes from the surface of the second needle bar 130 at one end of the third groove 131, preventing the needle bar clamping mechanism 140 from engaging with the second needle bar 130, thus separating the needle bar clamping mechanism 140 from the second needle bar 130; when the second anti-sway block 1423 engages... When the third groove 131 is in place, the needle bar clamping mechanism 140 can engage with the second needle bar 130. The lever 164 inside the second needle bar 130 protrudes from one end of the fourth groove 132, and the second retaining pin 162 cannot be engaged with the fourth groove 132. At this time, the needle bar clamping mechanism 140 is connected and held with the second needle bar 130. The needle bar clamping mechanism 140 can drive the second needle bar 130 to move up and down to perform the sewing operation of the second needle bar 130.

[0060] Furthermore, both the first retaining pin 161 and the second retaining pin 162 are internally provided with a fifth elastic element 163. The fifth elastic element 163 ensures that the first retaining pin 161 is always in contact with the surface of the first needle bar 120, and that the second retaining pin 162 is always in contact with the surface of the second needle bar 130. When the lever 164 does not protrude from the surface of the first needle bar 120, the first retaining pin 161 can directly engage with the second groove 122, and when the lever 164 does not protrude from the surface of the second needle bar 130, the second retaining pin 162 can directly engage with the fourth groove 132. In this embodiment, the fifth elastic element 163 is a compression spring; however, the fifth elastic element 163 can also be other elements capable of elastic deformation. The present invention does not limit the specific type of the fifth elastic element 163.

[0061] To release the engagement between the stop mechanism 150 and the needle bar clamping mechanism 140, specifically, as follows: Figure 1 and Figure 3As shown, the clutch mechanism 160 also includes a first clutch pin 165 and a second clutch pin 166, and a sixth elastic element is fitted on both the first clutch pin 165 and the second clutch pin 166.

[0062] In the extending direction of the first needle bar 120, the first clutch pin 165 is movable and can abut against the first stop rod 152. Specifically, the first clutch pin 165 abuts against the end of the first stop rod 152 away from the third elastic member 153. When the first clutch pin 165 is pressed, the first clutch pin 165 moves downward and abuts against the first stop rod 152, causing the first stop rod 152 to rotate around the second pin 156. The first stop rod 152 disengages from the first anti-sway block 1413, releasing the engagement between the stop mechanism 150 and the first needle bar clamp assembly 141. Furthermore, when the pressing force applied to the first clutch pin 165 is removed, under the elastic action of the sixth elastic element, the first clutch pin 165 moves upward, and the first stop rod 152 rotates in the opposite direction around the second pin shaft 156 under the elastic action of the third elastic element 153. The first stop rod 152 can re-engage with the first anti-sway block 1413, and re-establish the engagement relationship between the stop mechanism 150 and the first needle bar clamp assembly 141.

[0063] Similarly, in the extending direction of the second needle bar 130, the second clutch pin 166 is movable and can abut against the second stop rod 154. Specifically, the second clutch pin 166 can abut against the end of the second stop rod 154 away from the fourth elastic member 155. When the second clutch pin 166 is pressed, the second clutch pin 166 moves downward and abuts against the second stop rod 154, causing the second stop rod 154 to rotate around the second pin 156. The second stop rod 154 disengages from the second anti-sway block 1423, releasing the engagement relationship between the stop mechanism 150 and the second needle bar clamp assembly 142. Furthermore, when the pressing force applied to the second clutch pin 166 is removed, under the elastic action of the sixth elastic element, the second clutch pin 166 moves upward, and the second stop rod 154 rotates in the opposite direction around the second pin 156 under the elastic action of the fourth elastic element 155. The second stop rod 154 can re-engage with the second anti-sway block 1423, and re-establish the engagement relationship between the stop mechanism 150 and the second needle bar clamp assembly 142.

[0064] It should be noted that both the fifth elastic element 163 and the sixth elastic element are compression springs. Of course, the fifth elastic element 163 and the sixth elastic element can also be other elements capable of elastic deformation. The present invention does not limit the specific type of the fifth elastic element 163 and the sixth elastic element.

[0065] To further realize the switching action between the first needle bar 120 and the second needle bar 130, a preferred embodiment is as follows: Figure 1As shown, the detachable double-needle sewing machine 100 also includes a sliding mechanism 170. The sliding mechanism 170 is detachably fixed to the machine frame by means of screwing, snap-fitting, etc., and the sliding mechanism 170 is movable along the parallel direction of the first needle bar 120 and the second needle bar 130. During the movement, the sliding mechanism 170 can abut against the needle bar clamping mechanism 140 and / or the clutch mechanism 160 to apply abutting force to the needle bar clamping mechanism 140 and / or the clutch mechanism 160, thereby driving the movement of the needle bar clamping mechanism 140 and / or the clutch mechanism 160 to realize the switching action between the first needle bar 120 and the second needle bar 130.

[0066] In order to drive the movement of the sliding mechanism 170, specifically, as follows: Figure 1 , Figure 3 , Figure 5 , Figure 6 as well as Figure 7 As shown, the sliding mechanism 170 includes a first drive source 171, a seventh elastic element 172, and a slider 173. The first drive source 171 is fixed to the frame by screws. One end of the seventh elastic element 172 is connected to the output end of the first drive source 171, and the other end of the seventh elastic element 172 is connected to the slider 173. When the first drive source 171 outputs power, the seventh elastic element 172 is elastically compressed or elastically stretched, thereby driving the slider 173 to move in the deformation direction of the seventh elastic element 172, that is, driving the slider 173 to move along the parallel direction of the first needle bar 120 and the second needle bar 130. Compared with traditional sliding mechanisms, which are directly connected to the slider through drive shafts, drive rods, etc., to drive the slider's movement, the slider is prone to motion interference with other components during movement due to the rigid connection between the drive shaft, drive rod, and slider. In this embodiment, the movement of the slider 173 is driven by the seventh elastic element 172. Since the seventh elastic element 172 and the slider 173 are flexibly connected, the slider 173 has a certain clearance space even if it encounters other components during the movement, and will not interfere with the movement of other components.

[0067] In addition, in this embodiment, such as Figure 1 , Figure 3 , Figure 5 , Figure 6 as well as Figure 7As shown, the sliding mechanism 170 also includes a guide plate 174, an eighth elastic element 175, and a control module. A through slot 1741 is provided on the guide plate 174, and a guide pin 1732 protrudes from the surface of the slider 173 that contacts the guide plate 174. One end of the eighth elastic element 175 is fixed to the guide plate 174, and the other end is fixed to the guide pin 1732. Under normal conditions, the tension generated by the eighth elastic element 175 is greater than the pressure generated by the seventh elastic element 172, ensuring that the slider 173 remains in its normal position under the tension of the eighth elastic element 175. The control module is fixed to the frame. When the control module inputs a control signal to the first drive source 171, it causes the first drive source 171 to perform a corresponding action, thereby causing the seventh elastic element 172 to undergo elastic compression or elastic stretching, driving the slider 173 to move along the parallel direction of the first needle bar 120 and the second needle bar 130.

[0068] It should be noted that the first driving source 171 is a pair of electromagnets, driving a motor or other components capable of outputting power to the seventh elastic element 172. The present invention does not limit the specific type of the first driving source 171. Furthermore, in this embodiment, the seventh elastic element 172 is a compression spring, and the eighth elastic element 175 is a tension spring.

[0069] In one preferred embodiment, such as Figure 1 , Figure 3 as well as Figure 5As shown, the slider 173 has two spaced protrusions 1731, both of which face the needle bar clamping mechanism 140. The two protrusions 1731 can simultaneously abut against the first clutch lever 1412 and the second clutch pin 166, or the two protrusions 1731 can simultaneously abut against the second clutch lever 1422 and the first clutch pin 165. Specifically, when the two protrusions 1731 simultaneously abut against the first clutch lever 1412 and the second clutch pin 166, the first anti-sway block 1413 disengages from the first needle bar 120, the first stop lever 152 engages with the first anti-sway block 1413, and at the same time, the second stop lever 154 disengages from the second anti-sway block 1423, which can then engage with the second needle bar 130. The connection and holding state between the needle bar clamping mechanism 140 and the first needle bar 120 is switched to the state where the needle bar clamping mechanism 140 and the first needle bar 120 are separated. Simultaneously, the state where the needle bar clamping mechanism 140 and the second needle bar 130 are separated is switched to the connection and holding state where the needle bar clamping mechanism 140 and the second needle bar 130 are connected, thereby switching the needle dropping operation of the first needle bar 120 to the needle dropping operation of the second needle bar 130. Conversely, when the two protrusions 1731 simultaneously abut against the second clutch lever 1422 and the first clutch pin 165, the second anti-sway block 1423 disengages from the second needle bar 130, the second stop lever 154 engages with the second anti-sway block 1423, and the first stop lever 152 disengages from the first anti-sway block 1413. The first anti-sway block 1413 can then engage with the first needle bar 120. The connection and holding state between the needle bar clamping mechanism 140 and the second needle bar 130 is switched to the separation state between the needle bar clamping mechanism 140 and the second needle bar 130. At the same time, the separation state between the needle bar clamping mechanism 140 and the first needle bar 120 is switched back to the connection and holding state between the needle bar clamping mechanism 140 and the first needle bar 120, thereby switching the needle dropping operation of the second needle bar 130 to the needle dropping operation of the first needle bar 120.

[0070] In another preferred embodiment, such as Figure 1 , Figure 3 as well as Figure 6As shown, the slider 173 has a protrusion 1731 facing the needle bar clamping mechanism 140. The protrusion 1731 can abut against the first clutch lever 1412 or the second clutch lever 1422 individually, or abut against the first clutch pin 165 and the second clutch pin 166 simultaneously. Specifically, when the protrusion 1731 abuts against the first clutch lever 1412 alone, the first anti-sway block 1413 retracts from the first needle bar 120, and independently releases the engagement relationship between the needle bar clamping mechanism 140 and the first needle bar 120, so that the needle bar clamping mechanism 140 and the first needle bar 120 are separated from each other. If the needle bar clamping mechanism 140 and the second needle bar 130 are also separated from each other at this time, the first needle bar 120 and the second needle bar 130 can be reset at the same time. Neither the first needle bar 120 nor the second needle bar 130 performs needle dropping operations, which is suitable for intermittent sewing operations on fabric. Similarly, when the protrusion 1731 abuts against the second clutch lever 1422 alone, the second anti-sway block 1423 retracts from the second needle bar 130, independently releasing the engagement relationship between the needle bar clamping mechanism 140 and the second needle bar 130, causing the needle bar clamping mechanism 140 and the second needle bar 130 to separate from each other. If the needle bar clamping mechanism 140 and the first needle bar 120 also separate from each other at this time, the first needle bar 120 and the second needle bar 130 can be reset simultaneously. Neither the first needle bar 120 nor the second needle bar 130 performs needle dropping operations, which is suitable for intermittent sewing operations on fabric. In addition, when the protrusion 1731 simultaneously abuts against the first clutch pin 165 and the second clutch pin 166, the first stop rod 152 retracts from the first anti-sway block 1413, and the second stop rod 154 retracts from the second anti-sway block 1423. At the same time, the first anti-sway block 1413 engages with the first needle bar 120, and the second anti-sway block 1423 engages with the second needle bar 130. At this time, the needle bar clamping mechanism 140 can simultaneously drive the first needle bar 120 and the second needle bar 130 to perform needle dropping operations on the machine frame. This is suitable for performing double-thread sewing on fabric at the same time, improving sewing quality and sewing efficiency.

[0071] In order for the needle bar clamping mechanism 140 to drive the first needle bar 120 and the second needle bar 130 to move up and down on the machine frame, a preferred embodiment is as follows: Figure 1 , Figure 2 as well as Figure 3As shown, the detachable double-needle sewing machine 100 also includes a swing mechanism 180. The swing mechanism 180 includes a second drive source 181, a swing shaft 182, and a needle bar swing frame 183. The second drive source 181 is fixed to the machine frame, and the output end of the second drive source 181 is connected to one end of the swing shaft 182 via a connecting rod 184. The other end of the swing shaft 182 is fixed to the needle bar swing frame 183. A sliding groove 1831 is provided in the needle bar swing frame 183, and a sliding member 1832 is movably provided in the sliding groove 1831. The sliding member 1832 can slide along the extension direction of the first needle bar 120 in the sliding groove 1831, that is, the sliding member 1832 moves up and down in the sliding groove 1831. The sliding member 1832 is fixed to the needle bar clamping mechanism 140.

[0072] In the aforementioned detachable double-needle sewing machine 100, when the second drive source 181 is activated, the swing shaft 182 can swing left and right via the connecting rod 184. The swing shaft 182 can drive the needle bar swing frame 183 to swing left and right. At this time, the sliding member 1832 can move up and down within the sliding groove 1831, thereby driving the needle bar clamping mechanism 140 to move up and down. When the needle bar clamping mechanism 140 is engaged with the first needle bar 120, the needle bar clamping mechanism 140 drives the first needle bar 120 to move up and down on the machine frame. When the needle bar clamping mechanism 140 is engaged with the second needle bar 130, the needle bar clamping mechanism 140 drives the second needle bar 130 to move up and down on the machine frame.

[0073] To provide a clearer understanding of the switching action of the detachable double-needle sewing machine 100, the switching action of the first needle bar 120 and the second needle bar 130 will be further explained below. The following explanation will only take the switching action of the first needle bar 120 to the second needle bar 130 as an example, and the slider 173 has two protrusions 1731.

[0074] The first anti-sway block 1413 engages with the first needle bar 120, and the needle bar clamping mechanism 140 can drive the first needle bar 120 to perform the needle dropping action. When the electronic control module sends a switching signal to the first drive source 171, the first drive source 171 performs a corresponding action, driving the slider 173 to move toward the side closer to the first needle bar 120. One of the two protrusions 1731 on the slider 173 corresponds to the first clutch lever 1412, and the other protrusion 1731 corresponds to the second clutch pin 166. During the up-and-down movement of the first needle bar 120, and when one of the protrusions 1731 abuts against the first clutch lever 1412, the first elastic element 1411 is compressed, and the first clutch lever 1412 rotates around the first pin 143, causing the first anti-sway block 1413 to exit the first groove 121. The first stop rod 152 engages with the first anti-sway block 1413, realizing the separation of the needle bar clamping mechanism 140 from the first needle bar 120. Simultaneously, another protrusion 1731 abuts against the second clutch pin 166. The second clutch pin 166 moves downward, stretching the fourth elastic element 155. The second stop rod 154 rotates around the second pin 156, causing the second stop rod 154 to disengage from the second anti-sway block 1423. The second anti-sway block 1423 engages with the third groove 131, thus maintaining the connection between the needle bar clamping mechanism 140 and the second needle bar 130. The needle bar clamping mechanism 140 can drive the second needle bar 130 to perform a needle-dropping action. By performing the above actions, the needle-dropping action of the first needle bar 120 can be switched to the needle-dropping action of the second needle bar 130. Of course, the switching from the needle-dropping action of the second needle bar 130 to the needle-dropping action of the first needle bar 120 is similar to the above actions and will not be described in detail here.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A detachable double-needle sewing machine, characterized in that, The machine includes a frame and a first needle bar, a second needle bar, a needle bar clamping mechanism, a stop mechanism, a clutch mechanism, and a sliding mechanism mounted on the frame. A rotary hook is mounted on the frame. The stop mechanism can engage with the needle bar clamping mechanism, wherein: Both the first needle bar and the second needle bar are movable on the frame and are spaced apart directly above the rotary hook. In the radial direction of the rotary hook, the first needle bar and the second needle bar are arranged side by side on the same side of the rotary hook. The vertical distance between the starting point of the hook and the first needle bar and the second needle bar is 2mm. The first needle bar and the second needle bar can share the same rotary hook. The clutch mechanism can release the engagement between the stop mechanism and the needle bar clamping mechanism, allowing the needle bar clamping mechanism to engage with the first needle bar and / or the second needle bar. The sliding mechanism can abut against the needle bar clamping mechanism and the clutch mechanism. The sliding mechanism includes a first driving source, a seventh elastic element, a slider and an eighth elastic element. One end of the seventh elastic element is connected to the output end of the first driving source, and the other end is connected to the slider. Under normal conditions, the tension generated by the eighth elastic element is greater than the pressure generated by the seventh elastic element, ensuring that the slider always remains in the normal position under the tension of the eighth elastic element. The needle bar clamping mechanism includes a first needle bar clamping assembly, a second needle bar clamping assembly, and a first pin. The first pin is fixed to the frame. The first needle bar clamping assembly includes a first elastic element, a first clutch lever, and a first anti-sway block. The middle portion of the first clutch lever is hinged to the first pin. One end of the first clutch lever abuts against the first elastic element, and the other end is hinged to the first anti-sway block. The first anti-sway block can engage with the first needle bar. The second needle bar clamping assembly includes a second elastic element, a second clutch lever, and a second anti-sway block. The middle portion of the second clutch lever is also hinged to the first pin. One end of the second clutch lever abuts against the second elastic element, and the other end is hinged to the second anti-sway block. The second anti-sway block can engage with the second needle bar. The stopping mechanism is movably engaged with the first anti-sway block and / or the second anti-sway block. The stopping mechanism includes a stopping bracket, a first stopping rod, a third elastic element, a second stopping rod, a fourth elastic element, and a second pin. The stopping bracket is fixed to the needle bar clamping mechanism, and the second pin is fixed to the needle bar clamping mechanism. One end of the first stopping rod is hinged to the second pin, and the other end can be engaged with the first anti-sway block. One end of the third elastic element abuts against the end of the first stopping rod away from the second pin, and the other end is fixed to the stopping bracket. One end of the second stopping rod is hinged to the second pin, and the other end can be engaged with the second anti-sway block. One end of the fourth elastic element abuts against the end of the second stopping rod away from the second pin, and the other end is fixed to the stopping bracket. The clutch mechanism further includes a first clutch pin and a second clutch pin. A sixth elastic element is sleeved on both the first clutch pin and the second clutch pin. The first clutch pin is movable in the extension direction of the first needle bar and can abut against the first stop rod. The second clutch pin is movable in the extension direction of the second needle bar and can abut against the second stop rod. The slider has two spaced-apart protrusions. When both protrusions simultaneously abut against the first clutch lever and the second clutch pin, the first anti-sway block retracts from the first needle bar, the first stop lever engages with the first anti-sway block, and the second stop lever retracts from the second anti-sway block, allowing the second anti-sway block to engage with the second needle bar. Conversely, when both protrusions simultaneously abut against the second clutch lever and the first clutch pin, the second anti-sway block retracts from the second needle bar, the second stop lever engages with the second anti-sway block, and the first stop lever retracts from the first anti-sway block, allowing the first anti-sway block to engage with the first needle bar.

2. The detachable double-needle sewing machine according to claim 1, characterized in that, The clutch mechanism includes a first retaining pin and a second retaining pin. Both the first retaining pin and the second retaining pin are provided with a fifth elastic element. Both the first needle bar and the second needle bar are hinged with levers. The first needle bar has a first groove and a second groove along its extension direction, and the openings of the first groove and the second groove are both facing the needle bar clamping mechanism. The first groove is located at one end close to the rotary hook. The first anti-sway block can be engaged in the first groove, and the first retaining pin can be engaged in the second groove. The second needle bar has a third groove and a fourth groove along its extension direction, and the openings of the third groove and the fourth groove are both facing the needle bar clamping mechanism. The third groove is located at one end close to the rotary hook. The second anti-sway block can be engaged in the third groove, and the second retaining pin can be engaged in the fourth groove. One end of the lever is located in the first groove and the third groove, and the other end is located in the second groove and the fourth groove.

3. The detachable double-needle sewing machine according to claim 1, characterized in that, The sliding mechanism is detachably fixed to the frame and is movable along the parallel direction of the first needle bar and the second needle bar.

4. The detachable double-needle sewing machine according to claim 3, characterized in that, The first drive source is fixed to the frame.

5. The detachable double-needle sewing machine according to claim 1, characterized in that, It also includes a swing mechanism, which includes a second drive source, a swing shaft, and a needle bar swing frame. The second drive source is fixed on the frame. The output end of the second drive source is connected to one end of the swing shaft via a connecting rod. The other end of the swing shaft is fixed to the needle bar swing frame. A sliding groove is provided in the needle bar swing frame. A sliding member is provided in the sliding groove. The sliding member can slide along the extension direction of the first needle bar in the sliding groove. The sliding member is fixedly connected to the needle bar clamping mechanism.

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