Needle bar sleeve capable of preventing fluff from being clamped and sewing machine
By opening a pressure relief groove on the needle rod sleeve, the problem that the fluff is prone to stick to and stuck into the needle rod sleeve during sewing is solved, and the probability of the fluff entering the deep part is reduced and the needle rod is prevented from getting stuck.
Patent Information
- Application Number
- CN202422007653.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-19
AI Technical Summary
During sewing, the fluff easily adheres to the surface of the needle rod and enters the needle rod sleeve, causing the movement of the needle rod to be blocked.
A needle rod sleeve is designed to prevent lumpy snailage. Several sets of pressure relief structures are arranged on the needle rod sleeve, including at least two pressure relief grooves. The pressure relief grooves are at the same level, and adjacent groups of pressure relief structures are arranged interlaced.
Through the design of the pressure relief groove, the velvet rolls up due to pressure changes when entering the needle rod sleeve, and adheres to the lower end surface of the pressure relief groove, reducing the probability of the velvet squeeze into the depth of the needle rod sleeve and avoiding the needle rod being stuck.
Smart Images
Figure CN222923399U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of clothing production and processing equipment, in particular to a needle bar sleeve and a sewing machine for preventing lint jamming. Background Art
[0002] The sewing needle of a sewing machine is installed on a needle bar. When the needle bar and the sewing needle are driven by a cloth piercing drive mechanism to sew through the cloth with a thread, lint will be generated from the thread, fabric, down, etc. and adhere to the vicinity of the thread passing range of the sewing machine. Generally, a needle bar thread hook is installed at the lower end of the needle bar, and a needle bar lower bushing thread hook is installed at the lower end of the lower bushing of the needle bar, that is, the thread passing range of the sewing thread is very close to the needle bar. In this way, lint, cloth lint, thread lint, etc. generated during the operation of the sewing machine have a certain probability of adhering to the surface of the needle bar. This kind of lint is generally short fiber. When the needle bar starts to rise from the lower dead center, the lint may be squeezed into the fitting gap between the needle bar and the needle bar sleeve due to adhering to the surface of the needle bar, thus resulting in the problem of needle bar lint jamming.
[0003] In addition, since the sewing machine rotates at a high speed, for example, the maximum speed of a flat sewing machine is 5000 revolutions per minute. When the needle bar reciprocates at a high speed, a certain amount of heat will be generated and a lubricating layer is required to cool it. Therefore, there is often an oil film on the needle bar. Due to the existence of the oil film, the lint is more likely to adhere to the surface of the needle bar.
[0004] Due to the oil film and the clearance of the needle bar, there is a certain probability of lint jamming in the sewing machine needle bar. Therefore, it is necessary to design a needle bar sleeve and a sewing machine for preventing lint jamming. Summary of the Utility Model
[0005] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the utility model is to provide a needle bar sleeve and a sewing machine for preventing lint jamming, which are used to solve the problem that lint is likely to enter the needle bar sleeve along with the needle bar during the sewing process in the prior art, resulting in the obstruction of the movement of the needle bar.
[0006] To achieve the above object, the utility model provides a needle bar sleeve for preventing lint jamming. The needle bar passes through the needle bar sleeve, and a sewing needle is arranged at the bottom end of the needle bar; a plurality of groups of pressure relief structures are arranged on the needle bar sleeve, and the plurality of groups of pressure relief structures are arranged at one end of the needle bar sleeve close to the sewing needle; each group of pressure relief structures includes at least two pressure relief grooves, and several pressure relief grooves in the same group are at the same horizontal height; adjacent groups of pressure relief structures are staggered at different heights of the needle bar sleeve.
[0007] Preferably, the pressure relief grooves are horizontally arranged on the needle bar sleeve, or the pressure relief grooves are obliquely arranged on the needle bar sleeve.
[0008] Preferably, a chamfer is arranged between the pressure relief groove and the inner wall of the needle bar sleeve.
[0009] Preferably, an oil hole is provided on the needle rod sleeve, and the oil hole is used for filling oil.
[0010] Preferably, the pressure relief groove can be replaced by a pressure relief hole.
[0011] To achieve the above-mentioned purpose or other purposes, the utility model also discloses a sewing machine, including a casing, a piercing material driving mechanism, an upper needle bar bushing, a lower needle bar bushing, a needle bar, and a machine needle, wherein the piercing material driving mechanism is arranged in the casing, and the piercing material driving mechanism is connected to the needle bar in a transmission manner; the upper needle bar bushing and the lower needle bar bushing are both arranged in the casing, and the upper needle bar bushing and the lower needle bar bushing are aligned in the vertical direction; the needle bar is inserted into the upper needle bar bushing and the lower needle bar bushing; the machine needle is arranged on the bottom end surface of the needle bar; the lower needle bar bushing adopts the above-mentioned needle bar sleeve to prevent fuzz from getting stuck.
[0012] Preferably, the sewing machine further comprises a needle bar lower bushing thread hook, and the needle bar lower bushing thread hook is arranged on the outer peripheral surface of the bottom end of the needle bar lower bushing.
[0013] As described above, the needle bar cover and sewing machine for preventing fluff from getting stuck of the utility model have the following beneficial effects:
[0014] 1. In the utility model, a pressure relief groove is provided on the needle bar sleeve. When the fluff follows the needle bar into the needle bar sleeve, the fluff will roll over due to the pressure change at the pressure relief groove and adhere to the lower end surface of the pressure relief groove, so that it will no longer adhere to the needle bar sleeve, reducing the probability of the fluff squeezing into the deep of the needle bar sleeve.
[0015] 2. In the utility model, a pressure relief groove is provided on the needle bar sleeve, which can increase the surface area of the needle bar sleeve and enhance the cooling effect of the needle bar and the machine needle.
[0016] 3. In the utility model, by providing a pressure relief groove on the needle bar sleeve, the mass of the needle bar sleeve is reduced, the precious metal copper scraps in the production process of the needle bar sleeve are increased, and the copper scraps can be recycled, thereby reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a spatial schematic diagram of a first embodiment of a needle bar sleeve for preventing fluff from getting stuck, which is involved in the utility model;
[0018] Figure 2 yes Figure 1 A half-section diagram of
[0019] Figure 3 It is a spatial schematic diagram of a second embodiment of a needle bar sleeve for preventing fluff from getting stuck, which is involved in the utility model;
[0020] Figure 4 yes Figure 3 A half-section diagram of
[0021] Figure 5 is a schematic spatial diagram of the sewing machine related to the present utility model.
[0022] Explanation of reference numerals:
[0023] 1. Machine shell; 2. Needle; 3. Needle bar; 4. Material piercing drive mechanism; 5. Upper bushing of needle bar; 6. Lower bushing of needle bar; 601. Pressure relief groove; 602. Installation part of thread hook of lower bushing of needle bar; 603. Oil hole; 604. Chamfer; 7. Thread hook of lower bushing of needle bar. Specific embodiments
[0024] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.
[0025] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limited conditions for the implementation of the present utility model. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope for the implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present utility model.
[0026] As Figures 1 - 5 shown, the present utility model provides a needle bar sleeve for preventing fluff jamming. The needle bar 3 passes through the needle bar sleeve, and a needle 2 is arranged at the bottom end of the needle bar 3; a plurality of groups of pressure relief structures are arranged on the needle bar sleeve, and the plurality of groups of pressure relief structures are arranged at the lower end of the needle bar sleeve; each group of pressure relief structures includes at least two pressure relief grooves 601, and several pressure relief grooves 601 in the same group are at the same horizontal height; adjacent groups of pressure relief structures are staggered at different heights of the needle bar sleeve.
[0027] For the needle bar sleeve for preventing fluff jamming provided by the present utility model, pressure relief structures are arranged on the needle bar sleeve, and the pressure relief structures include at least two pressure relief grooves 601. When the fluff enters the needle bar sleeve along with the needle bar 3, the fluff will roll over due to the change in pressure at the pressure relief grooves 601 and adhere to the lower end surface of the pressure relief grooves 601. The fluff no longer adheres to the inside of the needle bar sleeve, which can effectively reduce the probability of fluff squeezing into the deep part of the needle bar sleeve, and effectively reduce the phenomenon that fluff enters the gap between the needle bar sleeve and the needle bar 3 in the prior art, resulting in needle bar 3 jamming with fluff.
[0028] Further, as Figures 1 - 4 shown, there are two groups of pressure relief structures provided on the needle bar sleeve, and the two groups of pressure relief structures are arranged at different heights on the needle bar sleeve in the up and down direction; two pressure relief grooves 601 are provided on each group of pressure relief structures, and the two pressure relief grooves 601 are at the same horizontal height, that is, on the same pitch circle. Of course, there may be a certain small error in the horizontal height of the two pressure relief grooves 601; the pressure relief grooves 601 in the two groups of pressure relief structures are staggered. In other embodiments, the pressure relief structure may also be provided in three groups, and the number of pressure relief grooves 601 in each group of pressure relief structures may also be three. The number of pressure relief structures and the number of pressure relief grooves 601 in each group of pressure relief structures depend on the specific situation.
[0029] Preferably, as Figures 1 - 4 shown, the pressure relief groove 601 is horizontally opened on the needle bar sleeve, or the pressure relief groove 601 is obliquely opened on the needle bar sleeve. As Figures 1 - 2 shown, the pressure relief groove 601 is horizontally opened on the needle bar sleeve (the first embodiment); as Figures 3 - 4 shown, the pressure relief groove 601 is obliquely opened on the needle bar sleeve (the second embodiment).
[0030] Preferably, as Figure 2 shown, a chamfer 604 is provided between the pressure relief groove 601 and the inner wall of the needle bar sleeve. In this embodiment, a chamfer 604 is provided between the lower end surface of the pressure relief groove 601 and the inner wall of the needle bar sleeve. The purpose of providing the chamfer 604 is that when the fluff moves along with the needle bar 3, it will first pass through the lower end surface of the pressure relief groove 601. The pressure received by the fluff at the pressure relief groove 601 changes, and the fluff curls up and will adhere to the lower end surface of the pressure relief groove 601 from the surface of the needle bar 3.
[0031] Preferably, as Figures 1 - 4 shown, an oil hole 603 is provided on the needle bar sleeve, and the oil hole 603 is used for filling oil. The injected oil is used to cool the needle bar 3 to prevent the temperature of the needle bar 3 from being too high due to the reciprocating movement of the needle bar 3 up and down in the lower needle bar bushing 6.
[0032] Preferably, in this embodiment, the pressure relief groove 601 can be replaced by a pressure relief hole. The pressure relief hole can adopt a pressure relief hole similar to the structure of the exhaust pipe of an internal combustion engine.
[0033] In this embodiment, several groups of pressure relief structures separate the needle bar sleeve into several sections, but still keep it as a whole, and the inner surface of the needle bar sleeve is no longer continuous. Under the action of several groups of pressure relief structures, it can effectively prevent the fluff from being stuck deep into the needle bar sleeve, thereby preventing the needle bar 3 from being stuck.
[0034] To achieve the above purpose or other purposes, as Figure 5As shown in the figure, the present utility model also discloses a sewing machine, which includes a machine shell 1, a material piercing driving mechanism 4, an upper needle bar bushing 5, a lower needle bar bushing 6, a needle bar 3, and a sewing needle 2. The material piercing driving mechanism 4 is arranged in the machine shell 1, and the material piercing driving mechanism 4 is in transmission connection with the needle bar 3 for driving the up-and-down reciprocating movement of the sewing needle 2. The upper needle bar bushing 5 and the lower needle bar bushing 6 are both arranged in the machine shell 1, and the upper needle bar bushing 5 and the lower needle bar bushing 6 are aligned in the vertical direction. The needle bar 3 is inserted through the upper needle bar bushing 5 and the lower needle bar bushing 6. The sewing needle 2 is arranged on the bottom end surface of the needle bar 3. The lower needle bar bushing 6 adopts the above-mentioned needle bar sleeve for preventing fluff jamming. The material piercing driving mechanism 4 is a prior art and will not be repeated here.
[0035] Preferably, as Figure 5 shown in the figure, the sewing machine further includes a thread hook 7 for the lower needle bar bushing, and the thread hook 7 for the lower needle bar bushing is arranged on the outer peripheral surface of the bottom end of the lower needle bar bushing 6. In this embodiment, the outer peripheral surface of the bottom end of the lower needle bar bushing 6 is defined as a thread hook mounting portion 602 for the lower needle bar bushing, which is used for mounting the thread hook 7 for the lower needle bar bushing.
[0036] The needle bar sleeve for preventing fluff jamming and the sewing machine involved in the present utility model have the following working principle:
[0037] S1: The operator assembles and installs each component according to the Figures 1 - 5 description of the attached and the above-mentioned components.
[0038] S2: The operator passes the surface thread from the thread stand through each component on the machine shell 1 in sequence, and finally passes around the thread hook 7 for the lower needle bar bushing and threads it through the sewing needle 2.
[0039] S3: The operator starts the sewing machine, and the material piercing driving mechanism 4 works to drive the needle bar 3 to move up and down in the upper needle bar bushing 5 and the lower needle bar bushing 6, and the sewing needle 2 drives the surface thread to sew the fabric.
[0040] S4: When the fluff on the fabric adheres to the needle bar 3 and follows the needle bar 3 into the gap between the needle bar 3 and the lower needle bar bushing 6, the fluff follows the needle bar 3 up to the pressure relief groove 601. The pressure received by the fluff at the pressure relief groove 601 changes, and a curling phenomenon occurs, so that the fluff will not adhere to the inner surface of the needle bar sleeve. The fluff disengages from the mating gap between the needle bar 3 and the needle bar sleeve at the pressure relief groove 601, reducing the probability of fluff squeezing into the deep part of the needle bar sleeve.
[0041] The present utility model relates to a needle bar sleeve and a sewing machine for preventing lint jamming. A pressure relief groove 601 is provided on the needle bar sleeve. When lint enters the needle bar sleeve, the pressure of the lint at the pressure relief groove 601 changes, causing the lint to curl up and adhere to the lower end surface of the pressure relief groove 601, rather than adhering to the inner surface of the needle bar sleeve, reducing the probability of lint squeezing into the deep part of the needle bar sleeve and preventing the needle bar 3 from getting stuck. The pressure relief groove 601 provided in the present utility model increases the surface area of the needle bar sleeve and enhances the cooling effect on the needle bar 3 and the sewing needle 2.
[0042] In the sewing machine of the present utility model, the needle bar 3 reciprocates up and down in the upper needle bar bushing 5 and the lower needle bar bushing 6, and their cooperation is relatively precise. Therefore, the raw material of the lower needle bar bushing 6 is mainly made of copper, which has a high cost. Therefore, by providing the pressure relief groove 601 on the needle bar sleeve in the present utility model, the weight of the needle bar sleeve is reduced, and more precious metal copper chips are generated during the processing of the pressure relief groove 601. The precious metal copper chips can be recycled, effectively reducing the cost.
[0043] In summary, the present utility model effectively overcomes various disadvantages in the prior art and has high industrial utilization value.
[0044] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.
Claims
1. A needle bar sleeve for preventing fluff from getting stuck, wherein a needle bar (3) passes through the needle bar sleeve, and a needle (2) is arranged at the bottom end of the needle bar (3); characterized in that: The needle bar sleeve is provided with a plurality of groups of pressure relief structures, which are arranged at one end of the needle bar sleeve close to the machine needle (2); each group of pressure relief structures includes at least two pressure relief grooves (601), and the plurality of pressure relief grooves (601) in the same group are at the same horizontal height; adjacent groups of pressure relief structures are staggeredly arranged at different heights of the needle bar sleeve.
2. The needle bar sleeve for preventing hair from getting stuck according to claim 1, characterized in that: The pressure relief groove (601) is horizontally opened on the needle bar sleeve, or the pressure relief groove (601) is obliquely opened on the needle bar sleeve.
3. The needle bar sleeve for preventing hair from getting stuck according to claim 1, characterized in that: A chamfer (604) is provided between the pressure relief groove (601) and the inner wall of the needle rod sleeve.
4. The needle bar sleeve for preventing hair from getting stuck according to claim 1, characterized in that: The needle rod sleeve is provided with an oil hole (603), and the oil hole (603) is used for filling oil.
5. The needle bar sleeve for preventing hair from getting stuck according to claim 1, characterized in that: The pressure relief groove (601) can be replaced by a pressure relief hole.
6. A sewing machine, characterized in that: The invention comprises a machine casing (1), a piercing material driving mechanism (4), an upper needle bar bushing (5), a lower needle bar bushing (6), a needle bar (3), and a machine needle (2); the piercing material driving mechanism (4) is arranged in the machine casing (1), and the piercing material driving mechanism (4) is in driving connection with the needle bar (3); the upper needle bar bushing (5) and the lower needle bar bushing (6) are both arranged in the machine casing (1), and the upper needle bar bushing (5) and the lower needle bar bushing (6) are aligned in the vertical direction; the needle bar (3) is inserted into the upper needle bar bushing (5) and the lower needle bar bushing (6); and the machine needle (2) is arranged on the bottom end surface of the needle bar (3); The needle bar lower bushing (6) adopts the needle bar bushing for preventing fluff from getting stuck as described in any one of claims 1 to 5.
7. The sewing machine according to claim 6, characterized in that: It also comprises a needle bar lower bushing thread hook (7), wherein the needle bar lower bushing thread hook (7) is arranged on the outer peripheral surface of the bottom end of the needle bar lower bushing (6).