Feed mechanism driven by the main shaft of a sewing machine

Abstract

This invention provides a spindle-driven feeding mechanism for a sewing machine, comprising: a rear slide block, a reciprocating starting structure, and a spindle; the rear slide block is disposed in the rear receiving groove; the spindle is connected to the rear slide block via the reciprocating starting structure, and the spindle drives the rear slide block to reciprocate up and down via the reciprocating starting structure, which in turn drives the rear end of the teeth to reciprocate up and down. The spindle, through a transmission device, drives the rear end of the teeth to reciprocate up and down, thus enabling real-time up and down position changes at the rear end of the teeth. Simultaneously, it can be combined with the front slide block of existing technology to drive the front part of the teeth to move up and down, ultimately achieving the up and down movement of the teeth. This invention enables a new form of up and down movement during feeding, allowing the teeth to generate new movement patterns, thus meeting the needs of a spindle-driven feeding mechanism for sewing machines used in different scenarios.

Description

Technical Field

[0001] This invention relates to the field of sewing machine technology, and in particular to a feeding mechanism for a sewing machine spindle drive. Background Technology

[0002] Existing sewing machines use a feed dog assembly to drive the teeth in a compound up-and-down, back-and-forth motion. The feed dog assembly includes a main feed dog and a differential feed dog, and the teeth include a main feed tooth and a differential feed tooth. The main feed dog drives the main feed tooth in a compound up-and-down, back-and-forth motion, and the differential feed dog drives the differential feed tooth in a compound up-and-down, back-and-forth motion. The main feed tooth is located at the front of the main feed dog assembly, and the differential feed tooth is located at the front of the differential feed dog assembly.

[0003] like Figure 1 , Figure 2 and Figure 4 As shown, the main shaft 1 drives the feed adjustment assembly 2, which in turn drives the feed shaft 9 to reciprocate through the input crank 3. The slide section 31 of the input crank 3 moves the rear slide block 4, which in turn drives the differential tooth frame 6 to move back and forth through the differential slide block 5. The rear slide block 4 is hinged to one end of the connecting rod 7, and the other end of the connecting rod 7 is hinged to the differential crank 8. The differential crank 8 is connected to the differential adjustment assembly 10. At the same time, another section of the feed shaft 9 drives the main tooth frame 12 through the main tooth frame drive group 11, thus realizing the back and forth movement of the main tooth frame 12. The front slide block 13 is sleeved on the eccentric section of the main shaft 1. The front slide block 13 drives the tooth frame assembly to move up and down and supports the front end of the tooth frame assembly. The rear support part 14 of the tooth frame assembly is fixed to the housing. The rear guide hinge section 15 of the rear support part 14 of the tooth frame assembly is hinged to the rear slide block 17, which supports the rear end of the tooth frame assembly. When the main shaft 1 rotates in a circle, the teeth eventually make an elliptical motion through the above structure, thus achieving feeding.

[0004] like Figures 1 to 4 As shown, when the tooth is being fed, the hinge point of the rear guide hinge section 15 after being hinged with the rear slider 17 is directly or indirectly fixed to the machine housing. The main shaft 1 drives the front slider 13, which drives the tooth frame assembly to move up and down, thereby realizing the up and down movement of the tooth. The front slider 13 is the front guide. Figure 4 The diagram shown is a schematic representation of the principle of the first existing structure for driving teeth to move up and down. Figure 3 and Figure 4 As shown, the hinge point of the rear guide hinge section 15 after hinge with the rear slider 17 is directly fixed to the housing, and no eccentric structure is provided on the rear guide hinge section 15. Figure 5 The diagram shown illustrates the principle of the second type of existing structure that drives teeth to move up and down. Figure 5 and Figure 6As shown, the hinge point of the rear guide hinge section 15 after hinge with the rear slider 17 is indirectly fixed to the housing. The rear support part 14 is provided with the rear guide hinge section 15. The rear support part 14, relative to the rear guide hinge section 15, can be an eccentric shaft. Figure 7 The diagram shown illustrates the principle of the third existing structure for driving teeth to move up and down. Figure 7 and Figure 8 As shown, the hinge point of the rear guide hinge section 15 after hinge with the rear slider 17 is indirectly fixed to the housing. The rear support section 14 is provided with the rear guide hinge section 15, and the rear support section 14 is connected to the indirect locking device 16. The rear support section 14, relative to the rear guide hinge section 15, can be an eccentric shaft or a concentric shaft.

[0005] However, this method of tooth movement is limited and cannot broadly meet the sewing requirements of various fabric scenarios. How to design a new up-and-down movement pattern during material feeding, enabling the teeth to generate new movement patterns to meet the sewing needs of different scenarios, is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide a feeding mechanism that realizes a new up-and-down movement form during feeding, so that the teeth generate a new movement form, in order to meet the needs of the spindle drive of a sewing machine used in different sewing scenarios.

[0007] To solve the above-mentioned technical problems, the present invention provides a feeding mechanism driven by the main shaft of a sewing machine, comprising: a feed dog, the front end of which is provided with teeth, a front receiving groove on which a front slider is disposed, driving the front slider to move, and the front slider driving the front part of the feed dog to move up and down; the feed dog includes a main feed dog and a differential feed dog, and a feed dog drive assembly can drive the main feed dog and the differential feed dog to move back and forth; characterized in that the rear end of the feed dog is provided with a rear receiving groove; the feeding mechanism driven by the main shaft of the sewing machine further includes: a rear slider, a reciprocating starting structure, and a main shaft;

[0008] The rear slider is disposed in the rear receiving groove; the main shaft is connected to the rear slider through the reciprocating start structure, and the main shaft drives the rear slider to move up and down reciprocally through the reciprocating start structure, and the rear slider drives the rear end of the dental frame to move up and down reciprocally.

[0009] Preferably, the reciprocating start-up structure includes a rear drive eccentric component, a rear drive connecting rod, a rear axle crank, and a rear axle body; the main shaft is connected to the rear drive eccentric component, the rear drive eccentric component is connected to the input end of the rear drive connecting rod, the output end of the rear drive connecting rod is hinged to the rear axle crank, the rear axle crank is fixedly connected to the rear axle body, the rear axle body is inserted into the rear slider, and the rear axle body is hinged to the rear slider.

[0010] Furthermore, the feeding mechanism driven by the main shaft of the sewing machine also includes a rear-end amplitude adjustment device; the rear-end amplitude adjustment device includes a rear-end adjustment mechanism and a rear-end adjustment shaft connected to the rear-end adjustment mechanism, the rear-end adjustment shaft is provided with an adjustment groove, and the rear-end adjustment mechanism can drive the rear-end adjustment shaft to rotate; the output end of the rear-end drive linkage is hinged to the rear axle crank through the rear axle linkage, and the output end of the rear-end drive linkage is provided with an adjustment slider, the adjustment slider being disposed in the adjustment groove.

[0011] Furthermore, the rear adjustment shaft can be connected to the power element via an intermediate connecting assembly.

[0012] As described above, the spindle-driven feeding mechanism of the sewing machine of the present invention has the following beneficial effects:

[0013] The main shaft drives the rear slider to move up and down reciprocally through a reciprocating start-up structure. The rear slider can then push the rear end of the dental frame to move up and down reciprocally, thus enabling the rear end of the dental frame to change position in real time. At the same time, it can be combined with the front slider of the existing technology to drive the front part of the dental frame to move up and down, ultimately realizing the up and down movement of the teeth. This invention enables a new up and down movement form during feeding, so that the teeth can generate a new movement form, in order to meet the needs of the main shaft driven feeding mechanism of sewing machines used in different sewing scenarios. Attached Figure Description

[0014] Figure 1 The diagram shows a three-dimensional representation of the left side of the feeding mechanism driven by the spindle of an existing sewing machine.

[0015] Figure 2 The diagram shows a three-dimensional structure of the feeding mechanism driven by the spindle of an existing sewing machine.

[0016] Figure 3 The diagram shows a structural schematic of the first existing structure that drives teeth to move up and down, with a rear guide hinge section provided on the rear support.

[0017] Figure 4 This is a schematic diagram illustrating the principle of the first existing structure that drives teeth to move up and down.

[0018] Figure 5The diagram shows a structure with a rear guide hinge section on the rear support part in the existing second type of structure for driving teeth to move up and down.

[0019] Figure 6 This is a schematic diagram illustrating the principle of the second type of existing structure that drives teeth to move up and down.

[0020] Figure 7 The diagram shows a structural schematic of the third type of existing structure that drives teeth to move up and down, with a rear guide hinge section provided on the rear support.

[0021] Figure 8 This is a schematic diagram illustrating the principle of the third existing structure that drives teeth to move up and down.

[0022] Figure 9 The diagram shown in Example 1 illustrates the motion of the front slider when the rear end of the dental frame moves up and down and the front end moves or swings.

[0023] Figure 10 The diagram shown in Example 1 illustrates the motion when the rear end of the dental frame moves up and down while the hinge point of the front slider remains fixed.

[0024] Figure 11 The diagram shown in Example 1 illustrates the motion of the front slider when the rear end of the dental frame moves up and down and the hinge point of the front slider is installed in a hinged manner.

[0025] Figure 12 The diagram shown is a top view of the feeding mechanism driven by the spindle of the sewing machine in Example 1.

[0026] Figure 13 The diagram shown is a structural schematic of the rear shaft body of the feeding mechanism driven by the main shaft of the sewing machine in Embodiment 1.

[0027] Figure 14 The diagram shown in Example 1 illustrates the motion of the rear slider of the feed mechanism driven by the main shaft of the sewing machine, where the hinge point adopts the existing main shaft power transmission method.

[0028] Figure 15 The diagram shows a three-dimensional structure of the feeding mechanism driven by the spindle of the sewing machine, as shown in Example 2.

[0029] Figure 16 Displayed as Figure 15 An enlarged structural diagram at point E.

[0030] Figure 17 The diagram shown is a top view of the feeding mechanism driven by the spindle of the sewing machine in Example 2.

[0031] Figure 18The diagram shows the motion of the feeding mechanism driven by the spindle of the sewing machine in Example 2.

[0032] Figure 19 The diagram shown is a top-view perspective view of the feeding mechanism driven by the spindle of the sewing machine in Example 3.

[0033] Figure 20 This is a schematic diagram showing the tooth motion curve formed by the front, middle, and rear teeth of the feeding mechanism driven by the main shaft of the sewing machine in Example 1.

[0034] Figure 21 This is a schematic diagram showing the tooth movement curves formed by the front, middle, and rear teeth of an existing sewing machine.

[0035] Explanation of icon numbers

[0036] 1. Spindle

[0037] 2 Fabric feeding adjustment assembly

[0038] 3. Input crank

[0039] 31. Slide section

[0040] 4. Rear Slider Base

[0041] 5 Differential slider

[0042] 6 Differential dental arch

[0043] 7-link

[0044] 8 Differential Crank

[0045] 9. Fabric feed shaft

[0046] 10 Differential Adjustment Components

[0047] 11 Main feed dental frame drive assembly

[0048] 12 Master feed dental frame

[0049] 13 Front slider

[0050] 14 Rear Support Section

[0051] 15 Rear end guide articulated section

[0052] 16 Indirect locking device

[0053] 17. Rear Slider

[0054] 181 Front teeth

[0055] 182 Intermediate teeth

[0056] 183 Rear end teeth

[0057] 100 dental frame

[0058] 101 teeth

[0059] 1011 Front teeth

[0060] 1012 Intermediate teeth

[0061] 1013 Rear end teeth

[0062] 111 Front Receiver Groove

[0063] 112 Rear receiving groove

[0064] 120 Front Slider

[0065] 131 Master feeder dental frame

[0066] 132 Differential dental arch

[0067] 140 dental frame drive assembly

[0068] 210 Rear Slider

[0069] 220 reciprocating start-up structure

[0070] 221 Backend driver eccentric component

[0071] 222 Rear Drive Link

[0072] 223 Rear Axle Crank

[0073] 224 Rear Axle Body

[0074] 2241 Rear Axle Eccentric Section

[0075] 2242 Left derailleur

[0076] 2243 Right derailleur

[0077] 2244 Rear Axle Right Sleeve

[0078] 2245 Rear Axle Left Sleeve

[0079] 2246 Sleeve Circlip

[0080] 230 Rear Amplitude Adjustment Device

[0081] 231 Back-end adjustment mechanism

[0082] 2311 indicator board

[0083] 2312 Locking screw assembly

[0084] 2313 Adjusting rod

[0085] 2314 Adjustment seat

[0086] 2315 Plate guide groove

[0087] 232 Rear End Adjustment Shaft

[0088] 233 Adjustment slot

[0089] 234 Rear Axle Connecting Rod

[0090] 235 Adjusting slider

[0091] 250 stop block

[0092] 300 spindle

[0093] 610 Intermediate Connection Component

[0094] 620 Power Components Detailed Implementation

[0095] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0096] Please refer to the accompanying drawings. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0097] Example 1

[0098] like Figures 12 to 14As shown, the feeding mechanism driven by the main shaft of the sewing machine in this embodiment includes: a feed dog 100, with teeth 101 at the front end of the feed dog 100, a front receiving groove 111 on the feed dog 100, and a front slider 120 disposed in the front receiving groove 111. The front slider 120 is driven to move, and the front slider 120 drives the front part of the feed dog 100 to move up and down. The feed dog 100 includes a main feed feed dog 131 and a differential feed feed dog 132. The feed dog drive assembly 140 can drive the main feed feed dog 131 and the differential feed feed dog 132 to move back and forth. The feed dog 100 is characterized in that a rear receiving groove 112 is provided at the rear end. The feeding mechanism driven by the main shaft of the sewing machine also includes: a rear slider 210, a reciprocating start-up structure 220, and a main shaft 300.

[0099] The rear slider 210 is set in the rear receiving groove 112; the main shaft 300 is connected to the rear slider 210 through the reciprocating start structure 220. The main shaft 300 drives the rear slider 210 to move up and down reciprocally through the reciprocating start structure 220, and the rear slider 210 drives the rear end of the tooth frame 100 to move up and down reciprocally.

[0100] The main shaft 300 drives the rear slider 210 to move up and down reciprocally via the reciprocating start structure 220. The rear slider 210 can then push the rear end of the tooth frame 100 to move up and down reciprocally, thus enabling the rear end of the tooth frame 100 to change position in real time. Simultaneously, it can be combined with the front slider 120 of the prior art to drive the front part of the tooth frame 100 to move up and down, ultimately achieving the up and down movement of the teeth 101. This invention enables a new up and down movement pattern during feeding, allowing the teeth 101 to generate a new movement pattern, thereby satisfying the main shaft driven feeding mechanism of sewing machines used in different sewing scenarios.

[0101] The tooth 101 includes a front tooth portion 1011, a middle tooth portion 1012, and a rear tooth portion 1013. In this embodiment, the sewing machine's spindle-driven feeding mechanism enables the spindle to synchronously drive the front slider 120 and the rear slider 210 to reciprocate up and down. Therefore, the tooth movement curves formed by the front tooth portion 1011, the middle tooth portion 1012, and the rear tooth portion 1013 have the same shape, and achieve the up and down movement of the tooth 101. Figure 20 As shown. Sewing machines using existing technology, such as... Figure 21 As shown, the tooth movement curves formed by the front tooth 181, the middle tooth 182, and the rear tooth 183 are of different shapes.

[0102] The reciprocating start-up structure 220 includes a rear drive eccentric component 221, a rear drive connecting rod 222, a rear axle crank 223, and a rear axle body 224. A main shaft 300 is connected to the rear drive eccentric component 221, which is connected to the input end of the rear drive connecting rod 222. The output end of the rear drive connecting rod 222 is hinged to the rear axle crank 223. The rear axle crank 223 is fixedly connected to the rear axle body 224, which is inserted into the rear slider 210 and hinged to it. The main shaft 300 drives the rear drive eccentric component 221 to rotate, which in turn drives the rear drive connecting rod 222 to swing. The rear drive connecting rod 222, through the rear axle crank 223, drives the rear axle body 224 to rotate, and the rear axle body 224 drives the rear slider 210 to reciprocate up and down.

[0103] The rear axle body 224 is fitted with a rear axle right sleeve 2244 and a rear axle left sleeve 2245. The rear axle right sleeve 2244 is located on the right side of the rear axle crank 223, and the rear axle left sleeve 2245 is located on the left side of the rear axle crank 223. The rear axle body 224 is hinged to the housing through the rear axle right sleeve 2244 and the rear axle left sleeve 2245. The rear axle right sleeve 2244 is axially limited by the sleeve retaining spring 2246.

[0104] The rear end of the dental frame 100 moves up and down, as follows: Figure 9 As indicated by arrow F, the rear end of the dental arch 100 achieves real-time up-and-down position changes, and can be combined with the existing front slider 13 to ultimately achieve the up-and-down movement of the tooth 101. The front slider 13 is mounted on the dental arch 100, and the up-and-down movement of the tooth 101 is as follows... Figure 9 As indicated by the middle arrow G.

[0105] like Figure 10 As shown, the hinge point of the front slider 13 is fixed; the rear end of the dental frame 100 moves up and down, as... Figure 10 As indicated by the middle arrow H, tooth 101 moves up and down as follows: Figure 10 As indicated by the middle arrow I.

[0106] like Figure 11 As shown, the hinge point L of the front slider 120 is installed in a hinged manner; the rear end of the tooth frame 100 moves up and down, as... Figure 11 As indicated by the middle arrow J. The tooth 101 moves up and down as follows: Figure 10 As indicated by the middle arrow K.

[0107] like Figure 14 As shown, the hinge point of the rear slider 210 uses the existing main shaft 300 to transmit power. Through this transmission method, the vertical movement amplitude of the rear slider 210 is fixed, and the vertical movement time of the rear slider 210 relative to the movement time of the main shaft 300 is also fixed.

[0108] According to another preferred embodiment, the main shaft 300 drives the rear shaft body 224 to perform circular motion via gear transmission or belt transmission, which can also realize the real-time vertical movement of the rear slider 210. Gear transmission or belt transmission is not shown in the figure.

[0109] Example 2

[0110] like Figures 14 to 18 As shown, the difference between this embodiment and Embodiment 1 is that the feeding mechanism driven by the main shaft of the sewing machine further includes a rear-end amplitude adjustment device 230. The rear-end amplitude adjustment device 230 includes a rear-end adjustment mechanism 231 and a rear-end adjustment shaft 232 connected to the rear-end adjustment mechanism 231. The rear-end adjustment shaft 232 is provided with an adjustment groove 233, and the rear-end adjustment mechanism 231 can drive the rear-end adjustment shaft 232 to rotate. The output end of the rear-end drive linkage 222 is hinged to the rear axle crank 223 through the rear axle linkage 234. The output end of the rear-end drive linkage 222 is provided with an adjustment slider 235, which is disposed in the adjustment groove 233. The rear-end drive linkage 222 drives the rear axle crank 223 to swing through the rear axle linkage 234. The rear axle crank 223 drives the rear axle body 224 to rotate, and the rear axle body 224 drives the rear-end slider 210 to move up and down reciprocally. The rear adjustment mechanism 231 can drive the rear adjustment shaft 232 to rotate, thereby changing the tilt angle of the adjustment groove 233, which in turn changes the swing amplitude of the rear shaft body 224, ultimately achieving a change in the vertical movement amplitude of each tooth 101's trajectory. The tilt angle of the adjustment groove 233 is... Figure 18 The angle θ in the equation.

[0111] The rear adjustment mechanism 231 includes an indicator plate 2311, a locking screw 2312, an adjusting rod 2313, and an adjusting seat 2314. The indicator plate 2311 has a plate guide groove 2315, in which the locking screw 2312 can move. The locking screw 2312 is connected to one end of the adjusting rod 2313, and the other end of the adjusting rod 2313 is connected to the rear adjustment shaft 232, which is mounted on the adjusting seat 2314. One end of the adjusting rod 2313 is selectively connected and fixed to the plate guide groove 2315 via the locking screw 2312. When the angle of the adjusting rod 2313 changes, the tilt angle of the adjusting groove 233 changes.

[0112] The output ends of the rear axle connecting rod 234 and the rear drive connecting rod 222 and the adjusting slider 235 are hinged by a hinge pin, and the adjusting slider 235 slides inside the adjusting groove 233 on the rear adjusting shaft 232. At the same time, the stop block 250 and the rear adjusting shaft 232 are used to axially limit each other. The rear adjusting shaft 232 is hinged to the adjusting seat 2314 fixed on the housing. The other end of the rear adjusting shaft 232 exposed on the adjusting seat 2314 is fixedly connected to the other end of the adjusting rod 2313 by a screw component. One end of the adjusting rod 2313 is selectively connected and fixed to the plate guide groove 2315 by a locking screw component 2312. The indicator plate 2311 is fixed to the housing. The rear axle crank 223 is fixedly connected to the rear axle body 224 by screws. A right rear axle sleeve 2244 and a left rear axle sleeve 2245 are hinged to the rear axle body 224. The right rear axle sleeve 2244 is located to the right of the rear axle crank 223, and the left rear axle sleeve 2245 is located to the left of the rear axle crank 223. The right and left rear axle sleeves 2244 and 2245 serve as limiting elements. The axial ends of the right rear axle sleeve 2244 are limited by the rear axle crank 223 and retaining rings, and both the right and left rear axle sleeves 2244 and 2245 are fixed to the housing.

[0113] The rear axle body 224 is provided with a rear axle eccentric section 2241, and a rear end slider 210 is hinged to the rear axle eccentric section 2241. The rear end slider 210 slides with the rear bearing groove 112 of the gear frame 100. A left retaining ring 2242 and a right retaining ring 2243 are fitted on the rear axle body 224. The left retaining ring 2242 is located on the left side of the rear axle body 224, and the right retaining ring 2243 is located on the right side of the rear axle body 224. The left retaining ring 2242 and the right retaining ring 2243 limit the axial movement of the rear end slider 210, and together with the front guide component on the housing, they restrict the axial movement of the gear frame 100 along the main shaft.

[0114] When the main shaft rotates, it drives the rear shaft body 224 to swing. Due to the presence of the rear shaft eccentric section 2241, the rear end of the dental frame 100 moves up and down. At the same time, it combines with the up and down movement of the front end of the dental frame 100 to form the up and down movement of the tooth 101. In addition, combined with the existing front and back movement mode, it forms the elliptical movement of the tooth 101.

[0115] In addition to achieving the overall movement state of the teeth 101 in Embodiment 1 through different parameter configurations, the feeding mechanism can also adjust the angle of the adjusting rod 2313 to change the swing amplitude of the rear axle body 224, thereby ultimately achieving changes in the vertical movement amplitude of each tooth 101's trajectory, i.e. Figure 18 As shown, different vertical trajectory movements are used depending on the sewing scenario.

[0116] In addition to achieving the functions in Embodiment 1, this embodiment also adds the function of adjusting the up-and-down movement range of the rear end of the dental frame, further expanding the sewing range.

[0117] Example 3

[0118] like Figure 19 As shown, the difference between this embodiment and Embodiment 2 is that the rear adjustment shaft 232 can be directly or indirectly connected to the power element 620 through the intermediate connecting component 610. In this embodiment, the rear adjustment shaft 232 is directly connected to the power element 620 through the intermediate connecting component 610 to realize the operation of adjusting the swing amplitude of the rear axle body.

[0119] In summary, this embodiment effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0120] The above embodiments are merely illustrative of the principles and effects of this embodiment and are not intended to limit this embodiment. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this embodiment. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this embodiment should still be covered by the claims of this embodiment.

Claims

1. A feeding mechanism driven by the spindle of a sewing machine, comprising: A feed toother (100) is provided with teeth (101) at its front end. A front receiving groove (111) is provided on the feed toother (100), and a front slider (120) is disposed in the front receiving groove (111), driving the front slider (120) to move. The front slider (120) drives the front part of the feed toother (100) to move up and down. The feed toother (100) includes a main feed toother (131) and a differential feed toother (132), and a feed toother drive assembly (140) can drive the main feed toother (131) and the differential feed toother (132) to move back and forth. The feed toother (100) is characterized by having a rear receiving groove (112) at its rear end. The feed mechanism driven by the main shaft of the sewing machine further includes: The rear slider (210), the reciprocating start-up structure (220), and the spindle (300); The rear slider (210) is disposed in the rear receiving groove (112); the main shaft (300) is connected to the rear slider (210) through the reciprocating start structure (220), and the main shaft (300) drives the rear slider (210) to move up and down reciprocally through the reciprocating start structure (220), and the rear slider (210) drives the rear end of the dental frame (100) to move up and down reciprocally.

2. The feeding mechanism driven by the spindle of the sewing machine according to claim 1, characterized in that: The reciprocating start-up structure (220) includes a rear drive eccentric component (221), a rear drive connecting rod (222), a rear axle crank (223), and a rear axle body (224); the main shaft (300) is connected to the rear drive eccentric component (221), the rear drive eccentric component (221) is connected to the input end of the rear drive connecting rod (222), the output end of the rear drive connecting rod (222) is hinged to the rear axle crank (223), the rear axle crank (223) is fixedly connected to the rear axle body (224), the rear axle body (224) is inserted into the rear slider (210), and the rear axle body (224) is hinged to the rear slider (210).

3. The feeding mechanism driven by the spindle of the sewing machine according to claim 2, characterized in that: It also includes a rear amplitude adjustment device (230); the rear amplitude adjustment device (230) includes a rear adjustment mechanism (231) and a rear adjustment shaft (232) connected to the rear adjustment mechanism (231), the rear adjustment shaft (232) is provided with an adjustment groove (233), the rear adjustment mechanism (231) can drive the rear adjustment shaft (232) to rotate; the output end of the rear drive linkage (222) is hinged to the rear axle crank (223) through the rear axle linkage (234), the output end of the rear drive linkage (222) is provided with an adjustment slider (235), the adjustment slider (235) is disposed in the adjustment groove (233).

4. The feeding mechanism driven by the spindle of the sewing machine according to claim 2, characterized in that: The rear adjustment shaft (232) can be connected to the power element (620) via the intermediate connection assembly (610).

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