阅读说明：本技术 一种缝纫机具有调节针距的组合轮 (Sewing machine has combination wheel of adjusting gauge needle ) 是由 李质彬 林高宏 吴文俊 于 2021-01-30 设计创作，主要内容包括：本申请提出一种缝纫机具有调节针距的组合轮,具体涉及缝纫机制造技术领域。一种缝纫机具有调节针距的组合轮,其特征在于,所述组合轮具有定位轮、抬压脚凸轮和剪线曲柄轮,所述定位轮具有间接定位送布牙针距功能,所述抬压脚凸轮具有抬压脚动作功能,所述剪线曲柄轮具有剪线动作功能。在驱动电机不同驱动转角内驱动下完成针距调节动作和定位送布牙停止位置动作、抬压脚动作、剪线动作。本申请三个功能轮在不同时间段不同驱动转角内驱动都是基于缝纫机电控系统来控制实现的,本申请组合轮的实施不仅有效降低了缝纫机的制造成本,而且提高电控装置的有效控制水平,本申请的组合轮具有较高推广使用价值。(The application provides a sewing machine has combination wheel of adjusting gauge needle, concretely relates to sewing machine manufacturing technical field. The sewing machine is provided with a combined wheel for adjusting the stitch length, and is characterized in that the combined wheel is provided with a positioning wheel, a presser foot lifting cam and a thread trimming crank wheel, the positioning wheel has the function of indirectly positioning the stitch length of a feed dog, the presser foot lifting cam has the function of pressing foot lifting action, and the thread trimming crank wheel has the function of thread trimming action. The needle pitch adjusting action, the action of positioning the stop position of the feed dog, the action of lifting the presser foot and the action of trimming threads are completed under the driving of the driving motor in different driving corners. The three function wheel of this application all controls the realization based on sewing machine electric control system in the different drive corners of different time quantums, and the implementation of this application combination wheel has not only effectively reduced sewing machine's manufacturing cost, improves electrically controlled device's effective control level moreover, and the combination wheel of this application has higher using value of promoting.)

1. The sewing machine is provided with a combined wheel for adjusting the stitch length, and is characterized in that the combined wheel (20) is provided with a positioning wheel (21), a presser foot lifting cam (22) and a thread trimming crank wheel (23), the positioning wheel (21) has the function of indirectly positioning the stitch length of a feed dog (91), the presser foot lifting cam (22) has the function of pressing foot lifting action, and the thread trimming crank wheel (23) has the function of thread trimming action.

2. A sewing machine with a combination wheel for adjusting the pitch according to claim 1, characterised in that the combination wheel (20) also has any one of the other two combinations: the combined wheel (20) is provided with a positioning wheel (21) and a presser foot lifting cam (22), and the combined wheel (20) is provided with the positioning wheel (21) and a thread trimming crank wheel (23).

3. The sewing machine with the combination wheel for adjusting the stitch length is characterized in that the combination wheel (20) is provided with a shaft hole (12), the combination wheel (20) is sleeved and fixed on an output shaft (11), the presser foot lifting cam (22) is positioned between the positioning wheel (21) and the thread trimming crank wheel (23), and the positioning wheel (21), the presser foot lifting cam (22) and the thread trimming crank wheel (23) complete stitch length adjusting action, positioning feed dog stop position action, presser foot lifting action and thread trimming action under the driving of the driving motor (10) in different driving angles.

4. The combined wheel with the needle pitch adjusting function of the sewing machine according to claim 1, wherein the positioning wheel (21) is provided with a needle pitch adjusting groove (211), a feed dog positioning groove (212), a first return groove (213) and a second return groove (214), a sliding member (42) runs between the needle pitch adjusting groove (211), the feed dog positioning groove (212), the first return groove (213) and the second return groove (214), the needle pitch adjusting groove (211) is used for needle pitch adjustment, the feed dog positioning groove (212) is used for positioning a stop position of a feed dog (91), two ends of the needle pitch adjusting groove (211) adjacent to the feed dog positioning groove (212) are respectively provided with the first return groove (213) and the second return groove (214), and the arc of the output shaft (11) and the arc of the feed dog positioning groove (212) are on the same circle center.

5. Combined wheel with gauge adjustment according to claim 4, characterized in that the first (213) or second (214) return slot is used for the return of the slider (42) to the feed dog positioning slot (212) at the positive (215) or negative (216) maximum gauge point of the oscillating seat (30), the positive (215) and negative (216) maximum gauge point being located at the end point of the gauge adjustment slot (211).

6. A sewing machine with a combination wheel for adjusting the needle pitch according to claim 4, characterized in that the slider (42) enters the feed dog positioning groove (212) from the first return groove (213) or the second return groove (214), the slider (42) achieves the positioning of the stop position of the feed dog (91) when entering the feed dog positioning groove (212), the feed dog positioning groove (212) has an outer circular wall (21b) and an inner circular wall (21c), and the slider (42) slides between the outer circular wall (21b) and the inner circular wall (21 c).

7. The combined wheel with the needle pitch adjusting function of the sewing machine as claimed in claim 4, characterized in that the sewing machine further comprises a swinging seat (30), a connecting rod (44), a cloth feeding shaft (51) and a cloth feeding crank (52), the sliding part (42) is positioned in the middle of the rotating lever (41), the operating fulcrum of the rotating lever (41) is the sliding part (42), the rotating lever (41) is hinged with the connecting rod (44), the connecting rod (44) is hinged with the swinging seat (30), the cloth feeding crank (52) is fixed on the cloth feeding shaft (51) and is hinged with the swinging seat (30), and the cloth feeding shaft (51) is indirectly connected with the cloth feeding tooth (91).

8. A sewing machine with a combined wheel for adjusting the stitch length according to claim 4, characterized in that the rotating lever (41) is hinged at one end with a lever support shaft (43), the lever support shaft (43) being positioned on the machine body (45).

9. The combined wheel with the needle distance adjusting function for the sewing machine is characterized in that the presser foot lifting cam (22) is provided with a presser foot lifting action surface I (221), a presser foot lifting action surface II (222) and an idle surface (224), a presser foot lifting peak (223) is arranged between the presser foot lifting action surface I (221) and the presser foot lifting action surface II (222), the idle surface (224) abuts against a presser foot lifting mandril (61), and the presser foot lifting action surface I (221) or the presser foot lifting action surface II (222) lifts the presser foot lifting mandril (61) to reach the presser foot lifting peak (223).

10. A combined wheel with a needle pitch adjustment for a sewing machine according to claim 1, characterized in that the thread cutting crank wheel (23) has a rotary column (231) between a thread cutting action surface (73) and a thread cutting return action surface (74) of a thread cutting fork wheel (71) driven by a drive motor (10), the thread cutting action surface (73) is hinged to a thread cutting link (75), and the thread cutting link (75) drives a thread cutting long shaft (76) from the thread cutting link (75) to a final thread cutting execution end (77).

Technical Field

The application provides a sewing machine has combination wheel of adjusting gauge needle, concretely relates to sewing machine manufacturing technical field.

Background

The sewing machine for adjusting the needle pitch adopts a power source, the power source is utilized to drive a connecting rod, the connecting rod is connected to a feeding swing plate seat, the power source contracts to drive the connecting rod, and the connecting rod pulls a sliding plate to drive a swing seat so as to adjust the swing seat to adjust the needle pitch to be close to a zero position. However, the sewing machine needs to be additionally provided with power sources on the presser foot lifting and the thread cutting, so that the sewing machine needs at least more than two using power sources, the manufacturing cost of the sewing machine is increased, and the control difficulty of the sewing machine is also improved.

Disclosure of Invention

The combined wheel is characterized in that the combined wheel is provided with a positioning wheel, a presser foot lifting cam and a thread trimming crank wheel, the positioning wheel has the function of indirectly positioning the needle pitch of a cloth feeding tooth, the presser foot lifting cam has the function of pressing the presser foot, and the thread trimming crank wheel has the function of trimming.

Preferably, the combination wheel also has any one of the other two combinations: the combined wheel is provided with a positioning wheel and a pressure foot lifting cam, and the combined wheel is provided with a positioning wheel and a thread trimming crank wheel.

Preferably, the combined wheel is provided with a shaft hole, the combined wheel is sleeved and fixed on the output shaft, the presser foot lifting cam is positioned between the positioning wheel and the thread cutting crank wheel, and the positioning wheel, the presser foot lifting cam and the thread cutting crank wheel complete the needle pitch adjusting action and the positioning feed dog stop position action, the presser foot lifting action and the thread cutting action under the driving of the driving motor in different driving rotation angles.

Preferably, a needle pitch adjusting groove, a cloth feeding tooth positioning groove, a first return groove and a second return groove are arranged on the positioning wheel, a sliding part is operated among the needle pitch adjusting groove, the cloth feeding tooth positioning groove, the first return groove and the second return groove, the needle pitch adjusting groove is used for adjusting the needle pitch, the cloth feeding tooth positioning groove is used for positioning the stop position of the cloth feeding tooth, the first return groove and the second return groove are respectively arranged at two ends, adjacent to the cloth feeding tooth positioning groove, of the needle pitch adjusting groove, and the output shaft and the arc of the cloth feeding tooth positioning groove are located on the same circle center.

Preferably, the first return groove or the second return groove is used for returning the sliding part to the feed dog positioning groove at a positive needle pitch maximum point or a negative needle pitch maximum point of the swinging seat, and the positive needle pitch maximum point and the negative needle pitch maximum point are positioned at the tail end point of the needle pitch adjusting groove.

Preferably, the slider enters the feed dog positioning groove from the first return groove or the second return groove, the positioning of the feed dog stop position is realized when the slider enters the feed dog positioning groove, the feed dog positioning groove is provided with an outer circular wall and an inner circular wall, and the slider slides between the outer circular wall and the inner circular wall.

Preferably, the sewing machine is further provided with a swinging seat, a connecting rod, a cloth feeding shaft and a cloth feeding crank, the sliding piece is located in the middle of the rotating lever, the working fulcrum of the rotating lever is the sliding piece, the rotating lever is hinged with the connecting rod, the connecting rod is hinged with the swinging seat, the cloth feeding crank is fixed on the cloth feeding shaft and is hinged with the swinging seat, and the cloth feeding shaft is indirectly connected with the cloth feeding teeth.

Preferably, one end of the rotating lever is hinged with a lever supporting shaft, and the lever supporting shaft is positioned on the machine body.

Preferably, the presser foot lifting cam is provided with a presser foot lifting action surface I, a presser foot lifting action surface II and an idle running surface, the highest point of the presser foot lifting is arranged between the presser foot lifting action surface I and the presser foot lifting action surface II, the idle running surface abuts against a presser foot lifting mandril, and the presser foot lifting action surface I or the presser foot lifting action surface II lifts the presser foot lifting mandril to reach the highest point of the presser foot lifting.

Preferably, the thread trimming crank wheel has a rotation column located between a thread trimming action surface and a thread trimming return action surface of the thread trimming fork wheel driven by the driving motor, the thread trimming action surface is hinged to the thread trimming connecting rod, and the thread trimming connecting rod drives the thread trimming long shaft from the thread trimming connecting rod to the end thread trimming execution end.

The application proposes to be a sewing machine has its beneficial effect of combination wheel of adjusting the gauge needle to be: the combined wheel is provided with a positioning wheel, a presser foot lifting cam and a thread trimming crank wheel, the positioning wheel has the function of indirectly positioning the stitch length of the feed dog, the presser foot lifting cam has the function of pressing foot lifting action, and the thread trimming crank wheel has the function of thread trimming action. The three function wheel of this application all controls the realization based on sewing machine electric control system in the different drive corners of different time quantums, and the implementation of this application combination wheel has not only effectively reduced sewing machine's manufacturing cost, improves electrically controlled device's effective control level moreover, and the combination wheel of this application has higher using value of promoting.

Drawings

FIG. 1 is a view of a composite wheel construction of a sewing machine of the present application with adjustable stitch spacing;

FIG. 2 is a schematic view of a sewing machine of the present application with a combination wheel feed dog positioning wheel for adjusting stitch length and stitch length adjustment;

FIG. 3 is a schematic view of a sewing machine having a combination stitch gauge adjusting and swing seat for adjusting the stitch gauge of the present application;

FIG. 4 is a schematic view of a stitch length adjustment slot of a combination stitch wheel with adjustable stitch length for a sewing machine of the present application;

FIG. 5 is a side view of a composite wheel of a sewing machine of the present application with adjustable stitch length;

FIG. 6 is a schematic view of a stitch gauge dial bar of a combination stitch gauge sewing machine of the present application;

FIG. 7 is a view of a combination wheel thread trimmer with adjustable stitch length according to the present application;

FIG. 8 is a schematic view of a combination stitch lifting and pressing foot cam with needle gauge adjustment for a sewing machine according to the present application.

Reference numerals: the device comprises a driving motor 10, an output shaft 11, a shaft hole 12, a combination wheel 20, a positioning wheel 21, a needle pitch adjusting groove 211, a feed dog positioning groove 212, an outer circular wall 21b, an inner circular wall 21c, a first return groove 213, a second return groove 214, a maximum positive needle pitch point 215, a maximum negative needle pitch point 216, a pressure raising and pressing foot cam 22, a first pressure raising and pressing foot action surface 221, a second pressure raising and pressing foot action surface 222, a pressure raising and pressing foot peak 223, an idle surface 224, a trimming crank wheel 23, a rotating column 231, a swinging seat 30, a feeding swinging plate 31, a long swinging plate 33, a short feeding swinging plate 32, a rotating lever 41, a sliding part 42, a lever supporting shaft 43, a connecting rod 44, a machine body 45, a feed cloth shaft 51, a feed crank 52, a swinging connecting rod 53, a pressure raising and pressing foot ejector rod 61, a positioning sleeve 62, a pressing foot lever 63, a pressing foot end execution end 64, a trimming fork wheel 71, a fixed shaft 72, a trimming action surface 73, a trimming, a trimming long shaft 76, a spindle motor 81 and a feed dog 91.

Detailed Description

Preferred embodiments of the present application will be described in detail below with reference to fig. 1 to 8, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the scope of protection of the present application will be clearly and clearly defined, and these embodiments are only for illustrating the present invention and are not limited thereto.

The application provides a sewing machine has combination wheel of adjusting gauge needle, including driving motor 10, installs combination wheel 20 on the output shaft 11 that driving motor 10 has, and combination wheel 20 is used for realizing sewing machine's gauge needle regulation action, location feed dog stop position action, lifts presser foot action and trimming action at different time quantums. The four sewing actions are at each driving corner of the driving motor 10, and the wheels with different functions of the combined wheel 20 are driven by the driving motor 10 in each driving corner to complete the four sewing actions, or complete any one of the four sewing actions, or randomly combine two or more than two sewing actions.

The combination wheel 20 has three functional wheels, namely a positioning wheel 21, a lifting and pressing foot cam 22 and a trimming crank wheel 23, the positioning wheel 21, the lifting and pressing foot cam 22 and the trimming crank wheel 23 are integrally combined into the combination wheel 20, the three functional wheels can be independently arranged and respectively installed and fixed on the output shaft 11, and the lifting and pressing foot cam 22 is positioned between the positioning wheel 21 and the trimming crank wheel 23 regardless of combination or independent arrangement. The combination wheel 20 has a shaft hole 12 through which the output shaft 11 can be inserted and positioned, and the combination wheel 20 is fitted and fixed to the output shaft 11, so that the positioning wheel 21 is attached to the output shaft 11. In addition, the combination wheel 20 has any one of other two combinations: the combination wheel 20 is provided with a positioning wheel 21 and a presser foot lifting cam 22, and the combination wheel 20 is provided with a positioning wheel 21 and a thread cutting crank wheel 23, the arrangement is that the sewing machine combination wheel 20 is respectively combined particularly aiming at the presser foot lifting cam 22 and the thread cutting crank wheel 23, and the two combinations are also the subject matter protected by the application.

The positioning wheel 21 has a needle pitch adjusting groove 211, a feed dog positioning groove 212, a first return groove 213, and a second return groove 214. Two ends of the needle pitch adjusting groove 211 adjacent to the feed dog positioning groove 212 are a first return groove 213 and a second return groove 214 respectively. The needle pitch adjusting groove 211 is correspondingly matched with a rotating lever 41, the working movable fulcrum of the rotating lever 41 is a sliding part 42, the sliding part 42 is positioned in the middle of the rotating lever 41, the sliding part 42 slides and works among the needle pitch adjusting groove 211, the feed dog positioning groove 212, a first return groove 213 and a second return groove 214 according to sewing actions, and the first return groove 213 or the second return groove 214 is used for returning the sliding part 42 to the feed dog positioning groove 212 at a positive needle pitch maximum point 215 or a negative needle pitch maximum point 216 of the swinging seat 30. The maximum point 215 of the positive needle pitch and the maximum point 216 of the negative needle pitch of the swing seat 30 are located at the end points of both ends of the needle pitch adjusting groove 211, and the maximum point 215 of the positive needle pitch and the maximum point 216 of the negative needle pitch are uncertain and can be interchanged due to different models of sewing machines. One end of the rotating lever 41 is sleeved on the lever supporting shaft 43, the lever supporting shaft 43 is positioned on the machine body 45, and the lever supporting shaft 43 plays a role in fixing the rotating shaft by rotating the lever 41. The other end of the rotating lever 41 is hinged with a connecting rod 44, and the other end of the connecting rod 44 is hinged with the swinging seat 30. The needle pitch adjustment is to rotate the positioning wheel 21 by a certain angle by the driving motor 10 to change the action position of the sliding member 42 in the needle pitch adjustment groove 211, that is, the needle pitch adjustment groove 211 pushes the sliding member 42, so as to change the original swing angle of the swing seat 30 by rotating the lever 41 and the connecting rod 44, thereby realizing the needle pitch adjustment. The stitch length adjustment is performed in a state where the sewing machine is stopped, and the stitch length after the adjustment is successful is given to the swing base 30 as a new fixed stitch length.

When the thread cutting is required after the sewing is finished, the sliding member 42 is separated from the stitch length adjusting groove 211 and enters the feed dog positioning groove 212 through the first return groove 213 or the second return groove 214. The feed dog positioning groove 212 is provided with an outer circular wall 21b and an inner circular wall 21c, the sliding piece 42 slides between the outer circular wall 21b and the inner circular wall 21c, when the sliding piece 42 enters the feed dog positioning groove 212, it is determined that the feed dog 91 stays at the middle position of the needle plate hole, namely the stop position of the feed dog 91, and the effect that the sewing material between the feed dog 91 and the presser foot only receives the vertical motion of the feed dog transmitted by the spindle motor 81 and has no front and back feed motion is realized. When the positioning wheel 21 rotates, the sliding member 42 enters the feed dog positioning groove 212 from the needle pitch adjusting groove 211, the sliding member 42 together with the rotating lever 41 pushes the feeding swing plate 31 of the swing base 30 through the connecting rod 44, so that the feeding long swing plate 33 and the feeding short swing plate 32 of the swing base 30 are pushed to be flush, and the feeding long swing plate 33 and the feeding short swing plate 32 in the flush state are driven by the spindle motor 81 to swing the connecting rod 53 to act on the swing angle of the swing base 30 to be zero. The cloth feeding crank 52 is fixed on the cloth feeding shaft 51 and hinged on the swinging seat 30, the cloth feeding shaft 51 is indirectly connected with the cloth feeding teeth 91, when the swinging angle of the swinging seat 30 is zero, the cloth feeding crank 52 connecting the swinging seat 30 and the cloth feeding shaft 51 does not swing, at this time, the swinging seat 30 does not provide a swinging source of the front and back movement for the cloth feeding teeth 91, so that the cloth feeding shaft 51 does not swing, the cloth feeding teeth 91 do not have the front and back cloth feeding movement, the stop position of the cloth feeding teeth 91 of the sewing machine is determined, the invention of the application is realized, the thread cutting movement is executed immediately after the sewing machine is determined according to the main stop position of the cloth feeding teeth 91, and the technical effect that the thread cutting residual thread is as short as possible is realized.

The thread cutting operation is performed after the slider 42 enters the feed dog positioning groove 212 from the first return groove 213 or the second return groove 214 and pushes the feed dog positioning groove 212, that is, the stop position of the feed dog 91 is also determined, and then the presser foot is lifted, which is usually performed after the thread cutting operation is completed.

When the sliding member 42 in the positioning wheel 21 starts to enter the feed dog positioning slot 212 and pushes the connecting rod 44 to indirectly make the feed long swinging plate 33 and the feed short swinging plate 32 flush, the rotating column 231 of the trimming crank wheel 23 applies a pushing force to the trimming acting surface 73 of the trimming fork wheel 71 in the trimming rotating angle of the driving motor 10, and then the trimming acting surface 73 pushes the trimming long shaft 76 and the last trimming executing end executes the trimming action. The thread cutting long shaft 76 is hinged to the thread cutting connecting rod 75 through a passage and penetrates through the whole machine body 45 at the end thread cutting executing end, namely, the thread cutting connecting rod 75 drives the thread cutting long shaft 76 from the thread cutting connecting rod 75 to the end thread cutting executing end 77.

The thread cutting fork wheel 71 is positioned on the fixed shaft 72 by using the fixed shaft 72 as a rotating shaft, and a thread cutting action surface 73 and a thread cutting return action surface 74 of the thread cutting fork wheel 71 are pushed by the rotating column 231 to rotate along with the fixed shaft 72. The thread cutting action surface 73 is hinged to the thread cutting connecting rod 75, the thread cutting action surface 73 is stressed to push the thread cutting connecting rod 75 to press downwards, the thread cutting connecting rod 75 pushes the thread cutting end execution end 76 to execute thread cutting action, and thread cutting under the stop position state of the feed dog 91 is achieved.

The rotating column 231 is located between the trimming acting surface 73 and the trimming returning acting surface 74, the rotating column 231 is located in the idle stroke between the trimming acting surface 73 and the trimming returning acting surface 74, and the positioning wheel 21 is driven by the spindle motor 81 through the swinging connecting rod 53 to idle in the idle stroke during normal sewing, so that the driving motor 10 cannot generate actual action on trimming during normal sewing of the sewing machine of the application, and the rotating column 231 cannot touch the trimming acting surface 73 and the trimming returning acting surface 74 during other actions. The thread cutting return action surface 74 is used for returning the thread cutting fork wheel 71 to the original position of thread cutting after thread cutting, when the rotating column 231 presses the thread cutting action surface 73, that is, the rotating column 231 rotates for one circle, not only thread cutting is performed, but also the integral return of the thread cutting fork wheel 71 is completed.

When the sliding member 42 inside the positioning wheel 21 enters the feed dog positioning slot 212 to complete the thread trimming operation, the sewing machine immediately performs the presser foot lifting operation. The presser foot lifting cam 22 has a first presser foot lifting action surface 221, a second presser foot lifting action surface 222 and an idle surface 224, and a presser foot lifting peak 223 is formed between the first presser foot lifting action surface 221 and the second presser foot lifting action surface 222. During thread trimming, the presser foot lifting push rod 61 abuts against the idle surface 224 of the presser foot lifting cam 22, so that the sewing machine normal sewing and thread trimming operation driving motor 10 does not have an actual operation effect on the presser foot lifting.

The drive motor 10 performs a presser foot raising operation within the presser foot raising corner. The driving motor 10 drives the presser foot lifting cam 22 to lift the presser foot lifting ejector rod 61, and the sliding part 42 can enter from the first return groove 213 or the second return groove 214 and push the feed dog positioning groove 212, so that the presser foot lifting action under the stop position state of the feed dog 91 is realized. The first presser action surface 221 or the second presser action surface 222 of the presser cam 22 can reach the presser peak 223 for the presser lift ram 61, and the presser lift ram 61 can return to the starting position from the first return groove 213 or the second return groove 214. The presser foot lifting ejector rod 61 is sleeved in the positioning sleeve 62, the presser foot lifting ejector rod 61 is hinged with the presser foot lifting lever 63, the presser foot lifting lever 63 is connected with the presser foot lifting end execution end 64, the presser foot lifting action is executed by the presser foot lifting end execution end 64, and the presser foot lifting action at the stop position of the feed dog 91 is realized through the presser foot lifting action, so that the technical value is high.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.