CN213624705U

CN213624705U - Fixing base, lower machine head and sewing machine

Info

Publication number: CN213624705U
Application number: CN202022002932.3U
Authority: CN
Inventors: 张章生
Original assignee: Sichuan Kiase Sewing Machine Co ltd
Current assignee: Sichuan Kiase Sewing Machine Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-07-06
Anticipated expiration: 2030-09-14

Abstract

The utility model relates to a fixing base, lower aircraft nose and sewing machine, the fixing base includes pedestal and lid, the upper portion of pedestal is constructed with the trompil that is used for installing the bearing housing, the lid is constructed with a plurality of through-holes that are used for connecting the pedestal can be dismantled, the lid is used for sealing the trompil, the circumferencial direction of each through-hole is constructed with annular arch respectively; the utility model provides a fixing base, compact structure, reasonable in design, the installation, the dismantlement and the change of second motor and drive mechanism not only be convenient for, can prevent effectively moreover that liquid from getting into second motor and/or drive mechanism from the top in, can effectively protect the part of installing in fixing base inside or below, like second motor and drive mechanism etc..

Description

Fixing base, lower machine head and sewing machine

Technical Field

The utility model relates to a sewing machine technical field, concretely relates to fixing base, lower aircraft nose and sewing machine.

Background

Sewing machines are commonly used sewing machines, which generally make use of one or more sewing threads to form one or more stitches in the material to be sewn, to interlace or stitch together one or more layers of material; the sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitch is neat, beautiful, flat and firm, has high sewing speed and simple and convenient use, and is widely applied in the sewing industry.

At present, various types of sewing machines (for example, a computer sewing machine with a head capable of rotating 360 degrees (or a 360-degree-rotation perfect-stitch sewing machine, a computer pattern template sewing machine) are included), but the sewing machines with various structures generally include an upper head, a lower head matched with the upper head, and a sewing platform for flatly placing sewing materials, wherein the upper head is a main part of the sewing machine, and generally comprises four mechanisms of material puncturing, thread hooking, thread picking and feeding, and auxiliary mechanisms of thread winding, material pressing, tooth dropping and the like, and the upper head is generally arranged above the sewing platform; the lower machine head usually comprises a rotating shuttle mechanism, the rotating shuttle mechanism is usually arranged below the sewing platform and corresponds to the upper machine head, and the rotating shuttle mechanism is matched with the upper machine head (specifically matched with a machine needle of the upper machine head) so as to smoothly finish the sewing work.

In the prior art, the lower machine head generally includes a rotating base, a first motor, a fixed base, a second motor and a rotating shuttle mechanism, the first motor and the rotating shuttle mechanism are generally disposed on the rotating base, the rotating base is rotatably mounted on the fixed base, and the first motor is used for driving a rotating shuttle shaft and a rotating shuttle in the rotating shuttle mechanism to rotate (the rotating shuttle is mounted at one end of the rotating shuttle shaft), so that the rotating shuttle can be matched with the up-and-down reciprocating motion of the machine needle to hook and guide a thread to form a stitch; the second motor is fixed on the fixed seat, the fixed seat is usually installed on a frame of the sewing machine, and the second motor is used for driving the rotating seat to rotate relative to the fixed seat so as to achieve the purpose of adjusting the position of the rotating shuttle, so that the rotating shuttle can be matched with a machine needle to realize perfect stitches.

Because the needle reciprocates up and down once and the rotating shuttle needs to rotate twice, the rotating shuttle usually has higher rotating speed, especially in a high-speed sewing machine, the rotating speed of the rotating shuttle is higher, and therefore oil supply for the rotating shuttle is needed to lubricate so as to ensure the good working state of the sewing machine; in the prior art, an oil tank for storing lubricating oil is usually arranged on a rotating seat, and a corresponding oil supply oil path is constructed, so that the lubricating oil can finally flow out from the end part of a rotating shuttle shaft and directly act on the rotating shuttle, thereby achieving the purpose of lubricating the rotating shuttle; however, in the actual operation process, the lubricating oil usually leaks from the end of the rotating shuttle and/or the rotating shuttle shaft, and the leaked lubricating oil flows down along the rotating seat and is very easy to flow into the second motor installed below the rotating seat, which not only easily pollutes the second motor, but also may cause damages of the second motor, such as short circuit, machine burning, and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to improve the not enough that exists among the prior art, provide a compact structure, reasonable in design's fixing base, the installation, the dismantlement and the change of the second motor of not only being convenient for and drive mechanism can prevent effectively moreover that liquid from getting into in second motor and/or drive mechanism from the top, can effectively protect the motor and the drive mechanism of installing in the fixing base.

The utility model adopts the technical proposal that:

the utility model discloses the problem that the second motor of installing in the fixing base leads to motor pollution and/or damage easily to receive the influence of the lubricating oil that the top leaked is solved to the first aspect, provides a fixing base, including pedestal and lid, the superstructure of pedestal has the trompil that is used for installing the bearing housing, the lid is constructed a plurality of connections that can dismantle that are used for the through-hole of pedestal, and the lid is used for sealing the trompil, each the circumferencial direction of through-hole is constructed annular arch respectively. In this scheme, through constructing the through-hole on the lid, the fixed lid of utilization bolt detachable that can be convenient for the lid can seal the trompil, and construct annular protrusion respectively through the circumferencial direction at each through-hole to improve the height around each through-hole, make the lubricating oil that leaks on the lid can not follow the inside that the through-hole department flowed into the lid, thereby can effectively avoid lubricating oil to get into the inside of pedestal, and then can effectively protect the motor, prevent that the lubricating oil that the top leaked from polluting the motor and/or damaging the motor.

In order to make the lubricating oil leaked to the cover leave the cover from the edge of the cover and not seep into the opening, furthermore, the height of at least one position on the edge of the cover is lower than that of the annular bulge. So that the lubricating oil dropping on the cover can smoothly and automatically leave the cover along the lowest position at the edge of the cover, thereby preventing the lubricating oil from infiltrating into the seat body through the through hole.

The utility model discloses the lubricating oil that the second aspect will be solved and is leaked can flow along the lower surface of lid downwards to from the gap infiltration open-ended problem between lid and the opening, it is further, the edge of lid is constructed the drainage portion that has round downwardly extending or buckle. The setting of drainage portion for lubricating oil can follow the upper surface of lid, the outer surface of drainage portion flows downwards, and when flowing the lower extreme of drainage portion, because the action of gravity, lubricating oil can break away from the lid automatically and drop downwards by oneself, thereby prevents that lubricating oil from flowing along the lower surface of lid, and then can effectively avoid lubricating oil to ooze into the seat from the gap between lid and the opening internal.

In order to avoid the gap, it is preferable that the drainage part and the cover are integrally formed. Not only is convenient for production and manufacture, but also can effectively avoid generating new gaps on the cover.

In order to connect the cover, a plurality of connecting holes are formed in the seat body along the circumferential direction of the opening, and the connecting holes correspond to the through holes one to one. So that the detachable connection of the cover and the base body is realized by using the bolt.

The utility model discloses the third aspect will be solved and drip in the inside problem of pedestal of connecting hole infiltration pedestal along the lubricating oil on pedestal upper portion, and is further, the circumferencial direction along the trompil is constructed with annular boss on the pedestal, the connecting hole construct respectively in annular boss. In this scheme, through the circumferencial direction at the trompil construct cyclic annular boss, can effectively improve the height of trompil for the height that highly is higher than the pedestal upper surface of trompil, thereby make the lubricating oil that drips on pedestal upper portion can not permeate the pedestal inside via the connecting hole, thereby can further reach the purpose of protection motor.

For better protection, it is preferable that the cover has a circular structure, and the diameter of the cover is larger than the outer diameter of the annular boss. The cover can completely cover the annular boss, so that lubricating oil is effectively prevented from permeating into the seat body from the opening.

In order to facilitate the installation and the disassembly of the transmission shaft, the transmission shaft further comprises a shaft sleeve, the shaft sleeve comprises a sleeve for installing a bearing and a flange arranged at one end of the sleeve, the flange is provided with a plurality of flange holes, and the flange holes correspond to the connecting holes one by one;

the flange is detachably arranged between the cover and the annular boss, and the sleeve is positioned in the opening. Through the arrangement of the shaft sleeve, the bearing can be conveniently installed, so that the transmission shaft for realizing belt transmission can be conveniently installed in the seat body.

A lower machine head comprises a fixed seat and a rotating seat, wherein the rotating seat is rotatably arranged on the fixed seat.

The rotating shuttle device further comprises a rotating shuttle, a rotating shuttle shaft and a first motor, wherein the first motor is fixed on the rotating seat, the rotating shuttle shaft is rotatably arranged on the rotating seat, the rotating shuttle is arranged at one end of the rotating shuttle shaft, and the first motor is used for driving the rotating shuttle shaft to rotate;

the second motor is fixed on the fixed seat and is positioned right below the opening, the upper end of the transmission shaft is constrained in the opening, the lower end of the transmission shaft is connected with the motor, and a driving belt wheel is arranged on the transmission shaft; the transmission part comprises a transmission cylinder and a flange arranged at one end of the transmission cylinder, the transmission cylinder is arranged in the fixed seat through a bearing, the transmission cylinder is provided with a driven belt wheel, a transmission belt is tensioned between the driving belt wheel and the driven belt wheel,

the rotating seat is fixed on the flange, and an electric slip ring is arranged in the transmission cylinder.

A sewing machine comprises the fixed seat and a frame, wherein the fixed seat is arranged on the frame;

or, the lower machine head and the rack are included, and the fixed seat is installed on the rack.

Compared with the prior art, use the utility model provides a pair of fixing base, lower aircraft nose and sewing machine, compact structure, reasonable in design, the installation, the dismantlement and the change of the second motor of not only being convenient for and drive mechanism can prevent effectively moreover that liquid from getting into in second motor and/or drive mechanism from the top, can effectively protect the part of installing in the fixing base inside or below, like second motor and drive mechanism etc..

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a lower handpiece provided in an embodiment of the present invention.

Fig. 2 is a schematic view of a partial structure of a fixing base according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structure of fig. 2.

Fig. 4 is a partial cross-sectional view of a lower handpiece provided in an embodiment of the present invention.

Description of the drawings

Lower handpiece 100, rotary base 101, fixed base 102, opening 103, cover 104, through hole 105, annular protrusion 106, drainage part 107, annular boss 108, connecting hole 109, sleeve 110, flange 111, flange hole 112, and,

A second motor 201, a transmission shaft 202, a driving pulley 203, a transmission belt 204, a driven pulley 205, a transmission cylinder 206, a bearing 207,

An electrical slip ring 301.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-4, in the present embodiment, a fixing base is provided, which includes a base body and a cover 104, wherein an opening 103 for installing a bearing 207 sleeve is formed at an upper portion of the base body, the cover 104 is formed with a plurality of through holes 105 for detachably connecting to the base body, the cover 104 is formed for closing the opening 103, and annular protrusions 106 are respectively formed at circumferential directions of the through holes 105, as shown in fig. 2 and 3, in the present embodiment, the cover 104 can be easily detachably fixed by bolts by forming the through holes 105 at the cover 104, so that the cover 104 can close the opening 103, and the annular protrusions 106 are respectively formed at circumferential directions of the through holes 105, so as to increase a height around the through holes 105, so that lubricating oil leaked to the cover 104 cannot flow into an inside of the cover 104 from the through holes 105, and thus the lubricating oil can be effectively prevented from entering the inside of the opening 103, further, the motor (i.e., the second motor 201 in embodiment 2, which will not be described in detail later) can be effectively protected, and the leaked lubricant oil on the motor can be prevented from polluting the motor and/or damaging the motor.

In this embodiment, the seat body is mainly used for supporting the installation of each component, and the shape of the seat body can be determined according to actual requirements.

The number of the through holes 105 may be determined according to actual requirements, and preferably is greater than or equal to 3, for example, as shown in fig. 2 and fig. 3, in the embodiment, four through holes 105 are included, and the through holes 105 are preferably circular holes.

In this embodiment, the upper surface of the cover 104 is preferably flat, and when the upper surface of the cover 104 is not flat, according to the design concept of this embodiment, in order to make the lubricant leaked to the cover 104 leave the cover 104 from the edge of the cover 104 without permeating into the opening 103, in a further aspect, the height of at least one position at the edge of the cover 104 is lower than the height of the annular protrusion 106, so that the lubricant dropped on the cover 104 can smoothly and automatically leave the cover 104 along the lowest position at the edge of the cover 104, thereby preventing the lubricant from permeating into the interior of the housing through the through hole 105.

Since the leaked lubricant will generally flow downward along the lower surface of the cover 104 after flowing over the side surface of the cover 104, and may infiltrate into the seat body from the gap between the cover 104 and the opening, in a further aspect, a circle of drainage portion 107 extending downward or bending is configured at the edge of the cover 104, as shown in fig. 1-4, the drainage portion 107 is disposed such that the lubricant can flow downward along the upper surface of the cover 104 and the outer surface of the drainage portion 107, and when flowing to the lowest end of the drainage portion 107, the lubricant can automatically separate from the cover 104 and automatically drip downward due to the gravity action, so as to prevent the lubricant from flowing along the lower surface of the cover 104, and further effectively prevent the lubricant from infiltrating into the seat body from the gap between the cover 104 and the opening.

To avoid the occurrence of a gap, it is preferable that the flow guide 107 and the cover 104 are integrally formed, which is convenient for production and manufacture, and can effectively avoid the occurrence of a new gap on the cover 104, for example, as shown in the figure, in the present embodiment, the flow guide 107 is formed by bending the edge of the cover 104 downward, and the cover 104 is an integral structure capable of guiding the lubricant to drip downward, so as to prevent the lubricant from contacting the lower surface of the cover 104.

As shown in fig. 1-4, in a more sophisticated scheme, a plurality of connection holes 109 are formed on the base body along the circumferential direction of the opening 103, and the connection holes 109 are in one-to-one correspondence with the through holes 105, so that the cover 104 can be detachably connected with the base body by using bolts.

In order to prevent the lubricant oil dropping on the upper portion of the base body from permeating into the base body through the connection hole 109, in a further aspect, an annular boss 108 is configured on the base body along the circumferential direction of the opening 103, and the connection holes 109 are respectively configured on the annular boss 108, as shown in fig. 1-4, by configuring the annular boss 108 in the circumferential direction of the opening 103, the height of the opening 103 can be effectively increased, so that the height of the opening 103 is higher than the height of the upper surface of the base body, and the lubricant oil dropping on the upper portion of the base body cannot permeate into the base body through the connection hole 109, thereby further achieving the purpose of protecting the motor.

For better protection, the cover 104 may preferably have a circular structure, and the diameter of the cover 104 is larger than the outer diameter of the annular boss 108, as shown in fig. 1 to 4, so that the cover 104 can completely cover the annular boss 108, thereby effectively preventing the lubricant from penetrating into the interior of the housing from the opening 103.

In order to facilitate the installation and the removal of the transmission shaft 202, in a further scheme, the transmission shaft further comprises a shaft sleeve, wherein the shaft sleeve comprises a sleeve 110 for installing the bearing 207 and a flange 111 arranged at one end of the sleeve 110, the flange 111 is provided with a plurality of flange holes 112, and the flange holes 112 correspond to the connecting holes 109 one by one;

the flange 111 is detachably mounted between the cover 104 and the annular boss 108 (usually, by bolts for detachable connection), and the sleeve 110 is located right in the opening 103, as shown in fig. 1-4, and a bearing 207 can be conveniently mounted by providing a shaft sleeve, so that the transmission shaft 202 for realizing belt transmission can be conveniently mounted inside the housing.

Example 2

The present embodiment provides a lower machine head 100, which includes the fixed seat 102 and the rotary seat 101 described in embodiment 1, wherein the rotary seat 101 is rotatably mounted on the fixed seat 102, so as to achieve the purpose of adjusting the orientation of the rotating shuttle, so that the rotating shuttle can be mutually matched with a machine needle to realize perfect stitches.

As shown in fig. 1 to 4, in this embodiment, in particular, the lower handpiece 100 further includes a rotating shuttle, a rotating shuttle shaft, and a first motor, the first motor is fixed to the rotating base 101, the rotating shuttle shaft is rotatably mounted on the rotating base 101, the rotating shuttle is mounted at one end of the rotating shuttle shaft, and the first motor is used for driving the rotating shuttle shaft to rotate so as to cooperate with the up-and-down reciprocating motion of the needle to perform thread hooking and guide the thread to form a stitch; it is understood that the first motor can drive the rotating shuttle shaft to rotate through a belt transmission mechanism, a gear transmission mechanism and the like, which are not illustrated one by one;

as shown in fig. 1-4, the electric vehicle further includes a second motor 201, a transmission shaft 202 and a transmission component, the second motor 201 is fixed to the fixing base 102 and is located right below the opening 103, an upper end of the transmission shaft 202 is constrained in the opening 103, for example, an upper end of the transmission shaft 202 may be mounted on the shaft sleeve through a bearing 207, and the shaft sleeve may be conveniently fixed at the opening 103, as shown in fig. 4; the lower end of the transmission shaft 202 is connected with the motor, and a driving belt pulley 203 is arranged on the transmission shaft 202 so as to realize belt transmission, such as synchronous belt transmission and the like;

as shown in fig. 4, the transmission component includes a transmission cylinder 206 and a flange 111 disposed at one end of the transmission cylinder 206, the transmission cylinder 206 is mounted in the fixing seat 102 through a bearing 207, the transmission cylinder 206 is provided with a driven pulley 205, and a transmission belt 204 is tensioned between the driving pulley 203 and the driven pulley 205, it can be understood that, in this embodiment, the driven pulley 205 may be directly mounted on the transmission cylinder 206, or a plurality of teeth may be directly configured on the outer side surface of the transmission cylinder 206 to function as the driven pulley 205;

as shown in fig. 4, in the present embodiment, the lower end of the rotary base 101 is fixed to the flange 111, so that the rotary base 101 can be driven to rotate by the second motor 201.

For convenience of power supply and signal and data transmission, as shown in fig. 4, in the present embodiment, an electrical slip ring 301 is disposed inside the transmission cylinder 206; the electrical slip ring 301 may adopt an electrical slip ring 301 commonly used in the prior art, and preferably, the electrical slip ring 301 includes a rotor portion and a stator portion, the rotor portion is rotatably sleeved on the stator portion, the rotor portion is fixed to the transmission cylinder 206, and the stator portion is fixed to the fixing base 102, so that power supply and signal transmission can be realized in the relative rotation process.

Example 3

The embodiment provides a sewing machine, which comprises the fixed seat 102 and a frame in the embodiment 1, wherein the fixed seat 102 is installed on the frame, the frame mainly plays a supporting role, and the upper surface of the frame is a plane and is used for flatly placing materials so as to perform sewing.

Example 4

The embodiment provides a sewing machine, which comprises a lower machine head 100 and a frame in embodiment 2, wherein the fixed seat 102 is installed on the frame, the frame mainly plays a supporting role, and the upper surface of the frame is a plane and is used for flatly placing materials so as to perform sewing.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. The fixing seat is characterized by comprising a seat body and a cover, wherein the upper part of the seat body is provided with an opening for mounting a bearing sleeve, the cover is provided with a plurality of through holes for detachably connecting the seat body, the cover is used for closing the opening, and annular protrusions are respectively formed in the circumferential direction of each through hole.

2. The holder as claimed in claim 1, wherein the height of the cover at least one location on the edge of the cover is lower than the height of the annular protrusion.

3. The holder as claimed in claim 1, wherein a ring of downwardly extending or bent drains is formed at the edge of the lid.

4. A holder as claimed in claim 3, in which the drain and the lid are integrally formed components.

5. The fixing base according to any one of claims 1 to 4, wherein the base body is formed with a plurality of connecting holes along a circumferential direction of the opening, and the connecting holes correspond to the through holes one to one.

6. The fixing base of claim 5, wherein the base body is formed with annular bosses along a circumferential direction of the opening, and the connecting holes are respectively formed in the annular bosses.

7. The fixing seat according to claim 6, further comprising a shaft sleeve, wherein the shaft sleeve comprises a sleeve for mounting the bearing and a flange arranged at one end of the sleeve, the flange is provided with a plurality of flange holes, and the flange holes correspond to the connecting holes one to one;

the flange is detachably arranged between the cover and the annular boss, and the sleeve is positioned in the opening.

8. A lower handpiece, characterized in that it comprises a fixed seat and a rotating seat as claimed in any one of claims 1 to 7, said rotating seat being rotatably mounted on said fixed seat.

9. The lower head as claimed in claim 8, further comprising a rotating shuttle, a rotating shuttle shaft, a first motor, wherein the first motor is fixed on the rotating base, the rotating shuttle shaft is rotatably mounted on the rotating base, the rotating shuttle is mounted at one end of the rotating shuttle shaft, and the first motor is used for driving the rotating shuttle shaft to rotate;

10. A sewing machine comprising the holder of any one of claims 1 to 8 and a frame, the holder being mounted to the frame;

or, comprising the lower head and the frame of claim 9, and the fixing base is mounted to the frame.