Sewing machine and lubricating method of sewing machine

Abstract

The invention relates to a sewing machine and a lubricating method of the sewing machine, the sewing machine comprises a rotating shuttle shaft assembly, the rotating shuttle shaft assembly comprises a rotating shuttle axial moving structure, a rotating shuttle shaft structure and a tooth frame shaft structure, the rotating shuttle axial moving structure is connected with the rotating shuttle shaft structure, and the tooth frame shaft structure is matched with the rotating shuttle shaft structure; the rotating shuttle shaft structure comprises a spline rotating shuttle shaft and a spline shaft sleeve, and the spline shaft sleeve is arranged on the circumferential outer side of the spline rotating shuttle shaft in a sleeving mode. The spline rotating shuttle shaft is provided with a hollow first lubricating oil containing space and a first lubricating oil communicating channel, the first lubricating oil communicating channel is arranged on the side wall of the spline rotating shuttle shaft and communicates the first lubricating oil containing space with the outside of the spline rotating shuttle shaft, and an outlet of the spline first lubricating oil communicating channel is located in the spline shaft section of the spline rotating shuttle shaft. The spline shaft sleeve is correspondingly arranged on the spline shaft section of the spline rotating shuttle shaft. According to the technical scheme, the problem that in the prior art, lubricating oil conveying of a sewing machine is not stable is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of sewing machine lubrication, and in particular, to a sewing machine and a lubrication method for the sewing machine. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing materials are interwoven or sewn together. Sewing machines include sewing machines, stitching machines, embroidery machines, and quilting machines.

[0003] The sewing machine requires the reciprocating motion of the needle and the shuttle to work together, that is, the sewing machine has multiple moving parts inside, and the moving parts have relative motion with other parts or themselves, so lubrication is needed to reduce friction and wear.

[0004] Some existing sewing machines are connected to the oil supply tank through the moving parts of the needle to deliver lubricating oil to the position that needs lubrication. Such a structure will result in that when the needle runs slowly, the lubricating oil cannot be delivered to the position that needs lubrication, resulting in increased friction and wear; when the needle runs fast, the lubricating oil delivery volume is large, resulting in lubricating oil waste, and even causing the lubricating oil to contaminate the sewing line. Summary of the invention

[0005] The present application provides a sewing machine and a lubricating method for the sewing machine, so as to solve the problem of unstable lubricating oil delivery of the sewing machine in the prior art.

[0006] A sewing machine according to the present application comprises: a rotary shuttle shaft assembly, the rotary shuttle shaft assembly comprises a rotary shuttle axial movement structure, a rotary shuttle shaft structure and a toothed rack shaft structure, the rotary shuttle axial movement structure is connected to the rotary shuttle shaft structure, the toothed rack shaft structure cooperates with the rotary shuttle shaft structure, the rotary shuttle shaft structure comprises a spline rotary shuttle shaft and a spline shaft sleeve, the spline shaft sleeve is sleeved on the circumferential outer side of the spline rotary shuttle shaft; the spline rotary shuttle shaft has a hollow first lubricating oil accommodating space and a first lubricating oil connecting channel, the first lubricating oil connecting channel is arranged on the side wall of the spline rotary shuttle shaft, and connects the first lubricating oil accommodating space and the outside of the spline rotary shuttle shaft, the outlet of the spline first lubricating oil connecting channel is located at the spline shaft section of the spline rotary shuttle shaft, and the spline shaft sleeve is correspondingly arranged on the spline shaft section of the spline rotary shuttle shaft.

[0007] Furthermore, the carrier shaft structure includes a carrier crankshaft and a carrier connecting rod, the carrier crankshaft sleeve is arranged on the circumferential outer side of the spline sleeve, the carrier connecting rod is rotatably sleeved on the circumferential outer side of the carrier crankshaft, the spline sleeve has a second lubricating oil connecting channel that passes through the side wall of the spline sleeve, and the second lubricating oil connecting channel is arranged corresponding to the carrier crankshaft.

[0008] Further, a cross-sectional area of ​​the second lubricating oil communicating passage is larger than a cross-sectional area of ​​the first lubricating oil communicating passage.

[0009] Furthermore, the inner wall of the splined rotary hook shaft is an inclined wall surface, and the inner wall of the splined rotary hook shaft corresponding to the first lubricating oil communication channel gradually decreases to both sides of the splined rotary hook shaft.

[0010] Furthermore, the carrier connecting rod has a third lubricating oil connecting channel, a fourth lubricating oil connecting channel and a hollow second lubricating oil containing space, the third lubricating oil connecting channel connects the second lubricating oil containing space and the first rotating shaft ring of the carrier connecting rod, and the fourth lubricating oil connecting channel connects the second lubricating oil containing space and the second rotating shaft ring of the carrier connecting rod.

[0011] Furthermore, the carrier shaft structure also includes a carrier shaft, the carrier shaft has a hollow third lubricating oil containing space, and the carrier shaft is provided with a fifth lubricating oil communicating channel penetrating the side wall of the carrier shaft.

[0012] Furthermore, the rotary shuttle axial movement structure includes a pull plate, the pull plate has a rotary shuttle shaft mounting hole, the rotary shuttle shaft mounting hole is rotatably mounted in the rotary shuttle shaft mounting hole of the pull plate, the pull plate has a sixth lubricating oil connecting channel and a hollow fourth lubricating oil containing space, the sixth lubricating oil connecting channel connects the fourth lubricating oil containing space and the rotary shuttle shaft mounting hole.

[0013] Furthermore, the sewing machine also includes a first lubricating oil tank and a first oil guiding structure, and the first oil guiding structure is connected to the interior of the first lubricating oil tank and the toothed rack shaft structure.

[0014] Furthermore, the sewing machine also includes a head device, which includes a crank disc, the crank disc has a fifth lubricating oil containing space and a seventh lubricating oil connecting channel, and the seventh lubricating oil connecting channel connects the shaft mounting hole of the crank disc and the fifth lubricating oil containing space.

[0015] According to another aspect of the present application, a lubrication method for a sewing machine is also provided. The sewing machine is the above-mentioned sewing machine. The lubrication method for the sewing machine includes: lubricating the spline shaft section by the lubricating oil in the rotary hook rod itself; and lubricating with oil cotton.

[0016] By applying the technical solution of the present application, the axial movement structure of the rotary shuttle can drive the rotary shuttle shaft structure to move axially along the spline rotary shuttle shaft, and the rotation of the spline rotary shuttle shaft drives the spline shaft sleeve to rotate. There is a large force between the spline rotary shuttle shaft and the spline shaft sleeve, and there will be relative movement when starting, which requires lubrication. The lubricating oil in the first lubricating oil containing space can lubricate the spline rotary shuttle shaft and the spline shaft sleeve through the first lubricating oil connecting channel under the action of centrifugal force, which can reduce the friction and wear between the spline rotary shuttle shaft and the spline shaft sleeve. The above structure does not need to transport the lubricating oil over a long distance through the oil pool, and the lubrication is relatively stable. The technical solution of the present application effectively solves the problem of unstable lubricating oil delivery in sewing machines in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a sewing machine according to an embodiment of the present application is shown;

[0020] Figure 2 Shows Figure 1 A structural schematic diagram of a sewing machine from another angle;

[0021] Figure 3 Shows Figure 1 A schematic diagram of the three-dimensional structure of a rotary hook shaft assembly of a sewing machine;

[0022] Figure 4 Shows Figure 3 A schematic diagram of the three-dimensional structure of the splined hook shaft of the hook shaft assembly;

[0023] Figure 5 Shows Figure 3 A schematic diagram of the three-dimensional structure of a spline sleeve of a rotary hook shaft assembly;

[0024] Figure 6 Shows Figure 3 A schematic diagram of the three-dimensional structure of the pull plate of the rotary hook shaft assembly;

[0025] Figure 7 Shows Figure 3 A schematic diagram of the internal structure of the tooth carrier shaft of the rotary hook shaft assembly;

[0026] Figure 8 Shows Figure 3 A schematic diagram of the internal structure of a first tooth rack connecting rod of a rotary hook shaft assembly;

[0027] Fig. 9 Shows Figure 3 A schematic diagram of the internal structure of a second tooth rack connecting rod of a rotary hook shaft assembly;

[0028] Fig.10 Shows Figure 3 A schematic diagram of the internal structure of a third tooth rack connecting rod of a rotary hook shaft assembly;

[0029] Fig.11 Shows Figure 3 A schematic diagram of the three-dimensional structure of the toothed rack crankshaft of the rotary hook shaft assembly;

[0030] Fig.12 Shows Figure 1 A structural schematic diagram of a first oil guide structure of a sewing machine;

[0031] Fig.13 Shows Figure 1 A schematic diagram of the three-dimensional structure of a crank disc of a sewing machine;

[0032] Fig.14 Shows Fig.13 A schematic diagram of the planar structure of the crank disc;

[0033] Fig.15 Shows Fig.13 Schematic cross-sectional view of the crank disc.

[0034] The above drawings include the following reference numerals:

[0035] 10. Rotary hook shaft assembly; 11. Rotary hook axial movement structure; 111. Pull plate; 1111. Rotary hook shaft mounting hole; 1112. Sixth lubricating oil communication channel; 1113. Fourth lubricating oil accommodating space; 12. Rotary hook shaft structure; 121. Splined rotary hook shaft; 1211. First lubricating oil accommodating space; 1212. First lubricating oil communication channel; 122. Splined shaft sleeve; 1221. Second lubricating oil communication channel; 13. Tooth rack shaft structure; 131. Tooth rack crankshaft; 132. Tooth rack connecting Rod; 1321, third lubricating oil connecting channel; 1322, fourth lubricating oil connecting channel; 1323, second lubricating oil containing space; 133, rack shaft; 1331, third lubricating oil containing space; 1332, fifth lubricating oil connecting channel; 20, first lubricating oil tank; 30, first oil guide structure; 31, oil cotton; 32, oil cotton sleeve; 40, machine head device; 41, crank disc; 411, fifth lubricating oil containing space; 412, seventh lubricating oil connecting channel; 50, machine table. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0038] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0039] like Figures 1 to 15 As shown, the sewing machine of this embodiment includes: a rotary shuttle shaft assembly 10, the rotary shuttle shaft assembly 10 includes a rotary shuttle axial moving structure 11, a rotary shuttle shaft structure 12 and a toothed rack shaft structure 13, the rotary shuttle axial moving structure 11 is connected to the rotary shuttle shaft structure 12, the toothed rack shaft structure 13 cooperates with the rotary shuttle shaft structure 12, the rotary shuttle shaft structure 12 includes a spline rotary shuttle shaft 121 and a spline shaft sleeve 122, and the spline shaft sleeve 122 is sleeved on the circumferential outer side of the spline rotary shuttle shaft 121. The splined shuttle shaft 121 has a hollow first lubricating oil containing space 1211 and a first lubricating oil connecting channel 1212. The first lubricating oil connecting channel 1212 is arranged on the side wall of the splined shuttle shaft 121, and connects the first lubricating oil containing space 1211 and the outside of the splined shuttle shaft 121. The outlet of the splined first lubricating oil connecting channel 1212 is located at the spline shaft section of the splined shuttle shaft 121, and the spline shaft sleeve 122 is correspondingly arranged on the spline shaft section of the splined shuttle shaft 121.

[0040] By applying the technical solution of this embodiment, the shuttle axial movement structure 11 can drive the shuttle shaft structure 12 to move axially along the spline shuttle shaft 121. The rotation of the spline shuttle shaft 121 drives the spline shaft sleeve 122 to rotate. There is a large force between the spline shuttle shaft 121 and the spline shaft sleeve 122, and there will be relative movement when starting, which requires lubrication. The lubricating oil in the first lubricating oil containing space 1211 can lubricate the spline shuttle shaft 121 and the spline shaft sleeve 122 through the first lubricating oil connecting channel 1212 under the action of centrifugal force, which can reduce the friction and wear between the spline shuttle shaft 121 and the spline shaft sleeve 122. The above structure does not need to transport the lubricating oil over a long distance through the oil pool, and the lubrication is relatively stable. The technical solution of this embodiment effectively solves the problem of unstable lubricating oil transportation of sewing machines in the prior art.

[0041] It should be noted that the through axis of the first lubricating oil communication channel 1212 extends in the radial direction of the splined rotary hook shaft 121. The above-mentioned splined shaft section does not refer to only one end of the splined rotary hook shaft 121, but refers to the portion between the first end of the splined rotary hook shaft 121 and the second end of the splined rotary hook shaft 121. The portion where the toothed shaft structure 13 cooperates with the splined rotary hook shaft 121 is collectively referred to as the splined shaft section, which also includes a portion of the rod section of the polished rod. The extension direction of the spline of the splined rotary hook shaft 121 is parallel to the axial direction of the splined rotary hook shaft.

[0042] like Figures 7 to 11 As shown, in the technical solution of this embodiment, the tooth frame shaft structure 13 includes a tooth frame crankshaft 131 and a tooth frame connecting rod 132, the tooth frame crankshaft 131 is sleeved on the circumferential outer side of the spline shaft sleeve 122, the tooth frame connecting rod 132 is rotatably sleeved on the circumferential outer side of the tooth frame crankshaft 131, the spline shaft sleeve 122 has a second lubricating oil connecting channel 1221 that passes through the side wall of the spline shaft sleeve 122, and the second lubricating oil connecting channel 1221 is arranged corresponding to the tooth frame crankshaft 131. The above-mentioned lubricating oil structure can reduce the friction and wear of the tooth frame shaft structure 13. It should be noted that the tooth frame shaft structure 13 also includes a tooth frame shaft driving motor, and the tooth frame shaft driving motor drives the tooth frame shaft 133 to rotate and move the angle to realize the forward or reverse cloth feeding of the tooth frame, as well as the distance of each cloth feeding. During operation, the rotation of the spline shuttle shaft 121 drives the spline sleeve 122 to rotate, and the rotation of the spline sleeve 122 drives the rotation of the tooth frame crankshaft 131. The tooth frame connecting rod 132 rotates relative to the tooth frame crankshaft 131. Since the tooth frame crankshaft 131 drives the tooth frame connecting rod 132 to periodically approach and move away, the tooth frame pushes the object to be sewn (such as cloth).

[0043] like Figure 4 , Figure 5 and Fig.11As shown, in the technical solution of this embodiment, the cross-sectional area of ​​the second lubricating oil communication channel 1221 is greater than the cross-sectional area of ​​the first lubricating oil communication channel 1212. The above structure is conducive to the lubricating oil passing through the second lubricating oil communication channel 1221 and the first lubricating oil communication channel 1212. It should be noted that the cross-sectional area of ​​the first lubricating oil communication channel 1212 is circular, the second lubricating oil communication channel 1221 extends along the circumference of the spline shaft sleeve 122, and the width of the second lubricating oil communication channel 1221 is greater than the diameter of the first lubricating oil communication channel 1212. The second lubricating oil connecting channel 1221 extends along the circumference of the spline sleeve 122, so that the lubricating oil has a wider range of circumferential lubrication. The width of the second lubricating oil connecting channel 1221 is greater than the diameter of the first lubricating oil connecting channel 1212. This ensures that when the spline rotary hook shaft 121 moves axially, the first lubricating oil connecting channel 1212 and the second lubricating oil connecting channel 1221 are always in a connected state, that is, the lubricating oil can flow to the parts that need lubrication through the first lubricating oil connecting channel 1212 and the second lubricating oil connecting channel 1221.

[0044] In the technical solution of this embodiment, the inner wall of the splined rotary hook shaft 121 is an inclined wall surface, and the inner wall of the splined rotary hook shaft 121 corresponding to the first lubricating oil connecting channel 1212 gradually decreases to the two sides of the splined rotary hook shaft 121. The above structure makes the position corresponding to the first lubricating oil connecting channel 1212 inside the splined rotary hook shaft 121 at a position where lubricating oil is easy to accumulate, so that when the splined rotary hook shaft 121 rotates, the lubricating oil enters the first lubricating oil connecting channel 1212 under the action of centrifugal force. That is, when the inside of the splined rotary hook shaft 121 is less, the lubrication effect of the rotary hook shaft assembly 10 can still be guaranteed. It should be noted that the inclination angle from the two ends of the splined rotary hook shaft 121 to the corresponding position of the first lubricating oil connecting channel 1212 is between 0.5° and 3°, and the inner wall of the circular ring corresponding to the first lubricating oil connecting channel 1212 is at a lower position, and lubricating oil is easy to accumulate at this position.

[0045] like Figure 3 , Figures 8 to 10As shown, in the technical solution of this embodiment, the tooth frame connecting rod 132 has a third lubricating oil connecting channel 1321, a fourth lubricating oil connecting channel 1322 and a hollow second lubricating oil containing space 1323, the third lubricating oil connecting channel 1321 connects the second lubricating oil containing space 1323 and the first rotating shaft collar of the tooth frame connecting rod 132, and the fourth lubricating oil connecting channel 1322 connects the second lubricating oil containing space 1323 and the second rotating shaft collar of the tooth frame connecting rod 132. The tooth frame connecting rod 132 of the above structure can meet the need for lubrication through its own structure. It should be noted that there are three tooth frame connecting rods 132, each of which is similar. Each tooth frame connecting rod 132 includes a tooth frame connecting rod body and a tooth frame connecting rod cover body, the tooth frame connecting rod body has a groove, and the tooth frame connecting rod cover body is covered on the tooth frame connecting rod body by a fastener to seal the groove to form the second lubricating oil containing space 1323. There are bosses on both sides of the tooth frame connecting rod 132, and screw fasteners connect the bosses of the tooth frame connecting rod body and the bosses of the tooth frame connecting rod cover body. The above structure is easy to connect and has a good sealing effect.

[0046] like Figure 7 As shown, in the technical solution of this embodiment, the tooth rack shaft structure 13 also includes a tooth rack shaft 133, the tooth rack shaft 133 has a hollow third lubricating oil containing space 1331, and the tooth rack shaft 133 is provided with a fifth lubricating oil connecting channel 1332 that penetrates the side wall of the tooth rack shaft 133. The above-mentioned tooth rack shaft 133 can also meet the lubrication problem of relative movement between its own structure and other components through its own structure. It should be noted that the tooth rack shaft structure includes two tooth rack shafts 133, a tooth rack and a fastener, the two tooth rack shafts 133 are respectively located on both sides of the tooth rack, and each tooth rack shaft 133 is provided with a fastener, and the active side is connected through the tail of two tooth rack connecting rods 132, and is rotatably connected to the tooth rack crankshaft 131, and is rotatably connected to the fastener of the tooth rack shaft 133.

[0047] like Figure 3 and Figure 6As shown, in the technical solution of this embodiment, the rotary hook axial movement structure 11 includes a pull plate 111, the pull plate 111 has a rotary hook shaft mounting hole 1111, the rotary hook shaft mounting hole 1111 is rotatably mounted in the rotary hook shaft mounting hole 1111 of the pull plate 111, the pull plate 111 has a sixth lubricating oil communication channel 1112 and a hollow fourth lubricating oil accommodating space 1113, and the sixth lubricating oil communication channel 1112 communicates the fourth lubricating oil accommodating space 1113 and the rotary hook shaft mounting hole 1111. The pull plate 111 can meet the lubrication between the pull plate 111 and the spline rotary hook shaft 121 through its own structure. It should be noted that the rotary hook axial movement structure 11 includes a rotary hook axial movement motor, a screw and a drive plate, the screw is connected to the rotary hook axial movement motor, the drive plate has a threaded hole, the screw is connected to the threaded hole through a thread, the drive plate is connected to the pull plate through a pull rod, and the rotation of the rotary hook axial movement motor is converted into the translation of the drive plate and the pull plate 111, thereby adjusting the axial position of the spline rotary hook shaft 121. It should be noted that the fourth lubricating oil containing space 1113 is located at the upper part of the rotary hook shaft mounting hole 1111, the sixth lubricating oil connecting channel 1112 is located at the upper part of the horizontal plane passing through the rotary hook shaft, and the axis of the sixth lubricating oil connecting channel 1112 forms an angle of 15° to 75° with the horizontal plane.

[0048] like Figure 3 and Fig.12 As shown, in the technical solution of this embodiment, the sewing machine also includes a first lubricating oil tank 20 and a first oil guide structure 30, and the first oil guide structure 30 connects the interior of the first lubricating oil tank 20 and the tooth frame shaft structure 13. Through the arrangement of the first lubricating oil tank 20 and the first oil guide structure 30, the diversity of lubrication of the sewing machine is achieved. For example, some structures are not convenient for setting up lubricating oil accommodating space, and the connection between the tooth frame and the fasteners installed on the tooth frame shaft 133, the lubricating oil in the first lubricating oil tank 20 is caused to move relative to each other through the first oil guide structure 30. The first oil guide structure 30 includes oil cotton 31 and an oil cotton sleeve 32. The first lubricating oil tank 20 and the first oil guide structure 30 are components of the first oil storage tank assembly.

[0049] like Figure 1 , Figure 2 as well as Figures 13 to 15 As shown, in the technical solution of this embodiment, the sewing machine also includes a head device 40, which includes a crank disc 41, and the crank disc 41 has a fifth lubricating oil containing space 411 and a seventh lubricating oil connecting channel 412, and the seventh lubricating oil connecting channel 412 connects the rotating shaft mounting hole of the crank disc 41 and the fifth lubricating oil containing space 411. The crank disc 41 achieves self-lubrication through its own structure. It should be noted that the above-mentioned crank disc 41 is connected to the crank disc 41 by the needle driving motor, the first end of the needle connecting rod is rotatably connected to the crank disc 41, and the second end of the needle connecting rod is connected to the needle bar structure, driving the needle bar structure to move up and down.

[0050] The head device includes a sewing machine head oil supply mechanism, and the sewing machine head oil supply mechanism also includes: a second oil storage tank assembly. The second oil storage tank assembly includes a second oil storage tank and a second oil guide structure. The needle bar assembly includes a needle bar structure and a first needle bar sleeve. The first needle bar sleeve is matched with the sewing machine body. The first needle bar sleeve is sleeved on the circumferential outer side of the needle bar structure. The first needle bar sleeve has a first communication hole that passes through the side wall of the first needle bar sleeve. The first oil guide structure is connected with the inside of the first oil storage tank and the first communication hole.

[0051] By applying the technical solution of this embodiment, a second oil storage tank and a second oil guide structure are provided, and the second oil guide structure is connected to the inside of the second oil storage tank and the second connecting hole, that is, the second oil guide structure can guide the lubricating oil in the second oil storage tank to the needle bar assembly, and lubricate the relatively moving part between the first needle bar sleeve and the needle bar structure, which changes the traditional use of lubricating oil for driving the operation of the machine needle, and the different output of lubricating oil due to different needle speeds. Such lubricating oil output is relatively stable, and the lubrication effect is relatively stable. The technical solution of this embodiment effectively solves the problem of unstable lubricating oil delivery of sewing machines in the prior art.

[0052] In the technical solution of this embodiment, the inner wall of the first needle rod sleeve has a first oil guide groove, which extends along the axial direction of the needle rod structure and is connected to the first connecting hole. The first oil guide groove is arranged to facilitate the accommodation of the first oil cotton, which guides the lubricating oil to between the first needle rod sleeve and the needle rod structure, thereby reducing friction, wear, and even the occurrence of seizure. In this embodiment, the first connecting hole is provided with one, and the first oil guide groove is provided with one, and the outlet hole of the first connecting hole is located in the middle and upper part of the first oil guide groove. The lubricating oil flows downward under the action of gravity. The first oil guide groove at the upper part of the first connecting hole can be provided with part of the first oil cotton, or it can be reached by the diffusion of the lubricating oil.

[0053] In the technical solution of this embodiment, the first oil guide structure includes a first oil cotton, the first end of the first oil cotton is located in the second oil storage tank, and the second end of the first oil cotton is located in the needle rod assembly. By means of the first oil cotton, there is no need to set up a special oil pipe or power equipment for pumping oil, which can greatly save costs. Specifically, the second end of the first oil cotton is located in the first oil guide groove, and the circumferential outer side of the first oil cotton between the second oil storage tank and the first connecting hole is provided with an oil cotton tube. The provision of the oil cotton tube can, on the one hand, prevent the lubricating oil from volatilizing, dripping out, and even contaminating other parts, and on the other hand, prevent the first oil cotton from being easily damaged by external forces.

[0054] In the technical solution of this embodiment, the second oil storage tank assembly also includes a third oil guide structure, the needle bar assembly includes an adjustment drive unit and a transmission rod, the transmission rod is rotatably arranged on the sewing machine housing, the adjustment drive unit cooperates with the transmission rod, the transmission rod cooperates with the needle bar structure, and the third oil guide structure is respectively connected to the third oil storage tank and the transmission rod. The provision of the third oil guide structure increases the lubrication range, that is, the third oil guide structure can lubricate the transmission rod. It should be noted that the first end of the third oil guide structure is connected to the interior of the second oil storage tank, and the second end of the third oil guide structure can be in contact with the transmission rod, or can be suspended and matched with the transmission rod, and the lubricating oil can be dripped or atomized on the transmission rod.

[0055] like Figures 1 to 3 As shown, in the technical solution of this embodiment, the second oil storage tank assembly also includes a fourth oil guide structure, the adjustment drive part is an adjustment drive motor, the adjustment drive motor cooperates with the transmission rod through a bevel gear, the transmission rod cooperates with the needle bar structure through a transmission gear to achieve axial adjustment of the machine needle, and the fourth oil guide structure is connected to both the bevel gear and the transmission gear. The setting of the fourth oil guide structure further expands the scope of using one oil storage tank to lubricate parts. It should be noted that the adjustment drive motor drives the transmission rod through the bevel gear (active bevel gear and driven bevel gear), the rotation of the transmission rod drives the axial movement of the needle bar structure through the transmission gear, and the axial direction of the transmission rod is parallel to the axial direction of the needle bar structure.

[0056] like Figure 1 and Figure 2 As shown, in the technical solution of this embodiment, the second oil storage tank is arranged on the upper part of the sewing machine housing. Such a structure saves space inside the sewing machine housing on the one hand, and on the other hand, the setting position of the second oil storage tank can ensure that the lubricating oil flows and has a better lubrication effect under the action of gravity. It should be noted that the top of the second oil storage tank has three mounting holes, and the three mounting holes correspond to the second oil guide structure, the third oil guide structure and the fourth oil guide structure respectively. The oil filling hole of the second oil storage tank is arranged on the bottom wall or side wall of the second oil storage tank. The third oil guide structure includes the second oil cotton, and the fourth oil guide structure includes the third oil cotton, which will not be repeated here.

[0057] In the technical solution of this embodiment, the oil supply mechanism of the sewing machine head also includes a third oil storage tank assembly, the third oil storage tank assembly also includes a third oil storage tank and a fifth oil guide structure, and the fifth oil guide structure is connected to the third oil storage tank and the needle bar structure. The setting of the fifth oil guide structure satisfies the lubrication of the bottom of the needle bar structure. For example, the needle bar structure of this embodiment includes a threaded rod sleeve and a threaded rod, the threaded rod sleeve is adaptively arranged on the circumferential outer side of the threaded rod, the threaded rod sleeve and the threaded rod are rotatably connected through a thread, the bottom of the threaded rod has a needle mounting seat, the threaded rod can rotate relative to the needle mounting seat, but the threaded rod cannot move axially relative to the needle mounting seat, that is, the threaded rod drives the needle mounting seat to move up and down, and the needle is installed on the side of the needle mounting seat away from the threaded rod. A second needle bar sleeve is also arranged on the circumferential outer side of the needle bar structure, and the second needle bar sleeve is lower than the first needle bar sleeve. For example, the first needle bar sleeve is installed on the upper wall of the sewing machine housing, and the second needle bar sleeve is installed on the lower wall of the sewing machine housing. The lubricating oil of the fifth oil guide structure can lubricate between the second needle bar sleeve and the needle bar structure.

[0058] In the technical solution of the present embodiment, the crank disk 41 driving the needle bar assembly has a hollow lubricating oil containing space (fifth lubricating oil containing space 411), and the fifth lubricating oil containing space 411 is connected to the rotating shaft mounting hole by a seventh lubricating oil connecting channel 412. The fifth lubricating oil containing space 411 is provided by utilizing the structure of the crank disk 41 itself to lubricate the crank disk 41 and the rotating shaft. It should be noted that the seventh lubricating oil connecting channel 412 of the present embodiment has two, one seventh lubricating oil connecting channel 412 connects the central shaft hole (rotating shaft for installing the motor) with the fifth lubricating oil containing space 411, and the other seventh lubricating oil connecting channel 412 connects the fifth lubricating oil containing space 411 with the eccentric shaft hole (rotating shaft for installing the connecting rod). The crank disk 41 also has an oil filling hole, which will not be described in detail here.

[0059] The sewing machine comprises a sewing machine frame device, a head device and a chassis device, wherein the head device is located on the upper part of the machine platform 50 of the sewing machine frame device, and the chassis device is located on the lower part of the machine platform 50 of the sewing machine frame device, and the head device comprises the above-mentioned sewing machine head oil supply mechanism. The head device of the sewing machine of the present application has stable lubrication and good lubrication effect.

[0060] The chassis device of the technical solution of the present application includes a fourth oil storage tank assembly, which is connected to a gear assembly in the chassis device. The gear assembly in the chassis device includes a gear connected to the rotary hook shaft motor, and a toothed rack shaft gear, etc. It should be noted that the parts lubricated by the fourth oil storage tank assembly are not limited to the above-mentioned gears, such as a rotating shaft connected to the toothed rack shaft through an oil guide structure, etc.

[0061] It should be noted that the head device of the sewing machine of the present application has a needle motor and a needle drive shaft, the needle motor is connected to the needle drive shaft, the needle drive shaft cooperates with the needle bar assembly and drives the needle bar assembly. The chassis device includes a shuttle motor and a shuttle shaft, the shuttle motor is connected to the shuttle shaft, and the shuttle motor drives the shuttle shaft. That is, one mode of the sewing machine of the present application is: the needle and the shuttle are driven by two independent and different motors, so that the head device and the chassis device are independent of each other (the electronic control is connected, and the coordination of the needle motor and the shuttle motor must be ensured). Structurally, the two parts of the rotating shaft of the sewing machine of such an embodiment are greatly shortened, and the flexural deformation caused by the shortening of the rotating shaft is relatively small, that is, the transmission accuracy of the sewing machine is higher.

[0062] The sewing machine of the present application lubricates the spline shaft section by lubricating oil in the rotary hook rod and the like, and lubricates by oil cotton.

[0063] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0064] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0065] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sewing machine, characterized in that: include: A rotary shuttle shaft assembly (10), the rotary shuttle shaft assembly (10) comprising a rotary shuttle axial movement structure (11), a rotary shuttle shaft structure (12) and a toothed shaft structure (13), the rotary shuttle axial movement structure (11) being connected to the rotary shuttle shaft structure (12), the toothed shaft structure (13) being matched with the rotary shuttle shaft structure (12), the rotary shuttle shaft structure (12) comprising a spline rotary shuttle shaft (121) and a spline shaft sleeve (122), the spline shaft sleeve (122) being sleeved on the circumferential outer side of the spline rotary shuttle shaft (121); The splined rotary shuttle shaft (121) comprises a hollow first lubricating oil containing space (1211) and a first lubricating oil connecting passage (1212); the first lubricating oil connecting passage (1212) is arranged on the side wall of the splined rotary shuttle shaft (121) and connects the first lubricating oil containing space (1211) and the outside of the splined rotary shuttle shaft (121); the outlet of the splined first lubricating oil connecting passage (1212) is located at the splined shaft section of the splined rotary shuttle shaft (121); and the splined shaft sleeve (122) is correspondingly arranged on the splined shaft section of the splined rotary shuttle shaft (121).

2. The sewing machine according to claim 1, characterized in that: The toothed rack shaft structure (13) comprises a toothed rack crankshaft (131) and a toothed rack connecting rod (132); the toothed rack crankshaft (131) is sleeved on the circumferential outer side of the spline shaft sleeve (122); the toothed rack connecting rod (132) is rotatably sleeved on the circumferential outer side of the toothed rack crankshaft (131); the spline shaft sleeve (122) has a second lubricating oil connecting channel (1221) penetrating the side wall of the spline shaft sleeve (122); the second lubricating oil connecting channel (1221) is arranged corresponding to the toothed rack crankshaft (131).

3. The sewing machine according to claim 2, characterized in that: The cross-sectional area of ​​the second lubricating oil communicating passage (1221) is greater than the cross-sectional area of ​​the first lubricating oil communicating passage (1212).

4. The sewing machine according to claim 1, characterized in that: The inner wall of the splined rotary shuttle shaft (121) is an inclined wall surface, and the inner wall of the splined rotary shuttle shaft (121) corresponding to the first lubricating oil communication channel (1212) gradually decreases to the two sides of the splined rotary shuttle shaft (121).

5. The sewing machine according to claim 2, characterized in that: The toothed connecting rod (132) has a third lubricating oil connecting channel (1321), a fourth lubricating oil connecting channel (1322) and a hollow second lubricating oil containing space (1323); the third lubricating oil connecting channel (1321) connects the second lubricating oil containing space (1323) and the first rotating shaft ring of the toothed connecting rod (132); the fourth lubricating oil connecting channel (1322) connects the second lubricating oil containing space (1323) and the second rotating shaft ring of the toothed connecting rod (132).

6. The sewing machine according to claim 5, characterized in that The tooth carrier shaft structure (13) further comprises a tooth carrier shaft (133), wherein the tooth carrier shaft (133) has a hollow third lubricating oil containing space (1331), and the tooth carrier shaft (133) is provided with a fifth lubricating oil connecting passage (1332) penetrating the side wall of the tooth carrier shaft (133).

7. The sewing machine according to claim 1, characterized in that The rotary shuttle axial movement structure (11) comprises a pull plate (111), the pull plate (111) having a rotary shuttle shaft mounting hole (1111), the rotary shuttle shaft mounting hole (1111) being rotatably mounted in the rotary shuttle shaft mounting hole (1111) of the pull plate (111), the pull plate (111) having a sixth lubricating oil connecting passage (1112) and a hollow fourth lubricating oil containing space (1113), the sixth lubricating oil connecting passage (1112) connecting the fourth lubricating oil containing space (1113) and the rotary shuttle shaft mounting hole (1111).

8. The sewing machine according to claim 1, characterized in that The sewing machine further comprises a first lubricating oil tank (20) and a first oil guide structure (30), wherein the first oil guide structure (30) connects the interior of the first lubricating oil tank (20) and the toothed rack shaft structure (13).

9. The sewing machine according to claim 1, characterized in that: The sewing machine also includes a head device (40), the head device (40) includes a crank disc (41), the crank disc (41) has a fifth lubricating oil containing space (411) and a seventh lubricating oil connecting channel (412), and the seventh lubricating oil connecting channel (412) connects the shaft mounting hole of the crank disc (41) and the fifth lubricating oil containing space (411).

10. A lubrication method for a sewing machine, characterized in that: The sewing machine is the sewing machine according to any one of claims 1 to 9, and the lubrication method of the sewing machine comprises: Lubricate the spline shaft section with the lubricating oil in the hook rod itself; Lubricate with cotton wool.

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