CN215404945U - A lower aircraft nose that is used for fin, roating seat and sewing machine of sewing machine - Google Patents

Abstract

The utility model relates to a radiating fin, a rotary seat and a lower machine head for a sewing machine, wherein the radiating fin comprises a base plate, and a plurality of fins are formed on one side of the base plate; the base plate is provided with an adaptive hole matched with the output shaft of the motor, and the adaptive hole penetrates through the base plate; the base plate is also provided with a plurality of first connecting parts for detachably connecting the rotating seat and a plurality of second connecting parts for detachably mounting the motor; the radiating fin provided by the utility model has a simple and compact structure, and can be adapted to the lower machine head of a sewing machine so as to efficiently radiate heat for the motor in the rotating seat, thereby effectively avoiding the problem of overheating of the seat body.

Description

A lower aircraft nose that is used for fin, roating seat and sewing machine of sewing machine

Technical Field

The utility model relates to the technical field of sewing equipment, in particular to a radiating fin and a rotary seat for a sewing machine and a lower machine head of the 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; various types of sewing machines (for example, quilting machines, computer sewing machines with heads capable of rotating 360 degrees (or referred to as 360-degree-rotation perfect-stitch sewing machines, computer pattern template sewing machines)) are included, but all kinds of 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 consists of four mechanisms of material puncturing, thread hooking, thread picking and feeding, and auxiliary mechanisms of wire 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 position of 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, for a 360-rotation lower handpiece, the lower handpiece generally comprises a rotating seat (or called as a rotating head) and a fixed seat, the rotating seat is rotatably mounted on the fixed seat, the fixed seat mainly plays a role in supporting the rotating seat and realizing motion separation, the rotating seat is provided with a rotating shuttle mechanism and a thread cutting mechanism and utilizes a motor as power, and a seat body of the rotating seat is generally made of aluminum alloy; in the actual motion in-process, install the motor in the pedestal and generate heat very easily, especially when installing two motors in the pedestal, calorific capacity is very big, however, the heat dissipation problem of motor not only is not considered to current lower aircraft nose, and prior art also lacks the heat dissipation device of aircraft nose under the adaptation moreover, and is narrow and small because the pedestal inner space leads to the current pedestal of aircraft nose down to appear overheated problem very easily because of generating heat of motor, awaits urgently to solve.

SUMMERY OF THE UTILITY MODEL

The utility model provides a radiating fin for solving the problems that the radiating problem of a motor is not considered in the lower machine head of the existing sewing machine, and the base body of the existing lower machine head is easy to overheat due to the heating of the motor because the radiating fin in the prior art is lack of a radiating device matched with the lower machine head, the radiating fin is simple and compact in structure, can be matched with the lower machine head of the sewing machine, and can efficiently radiate the motor in the base body, thereby effectively avoiding the problem of overheating of the base body, and the main conception is as follows:

a heat sink for a sewing machine comprises a base plate, wherein a plurality of fins are formed on one side of the base plate,

the base plate is provided with an adaptive hole matched with the output shaft of the motor, and the adaptive hole penetrates through the base plate;

the base plate is further constructed with a plurality of first connecting portions for detachably connecting the rotary base and a plurality of second connecting portions for detachably mounting the motor. In the scheme, the second connecting part is constructed on the substrate, so that the problems of mounting and dismounting of the motor can be solved, and the motor can be conveniently mounted on the radiating fin; and by configuring the fitting hole such that the output shaft of the motor can extend from one side of the base plate to the other side thereof so as to connect the transmission member; through constructing first connecting portion at the base plate, can solve the installation and the dismantlement problem of this fin to install this fin in the pedestal of aircraft nose down, not only can solve the installation problem of motor in the aircraft nose down, the heat that the motor gived off can conduct this fin in addition, and can utilize this fin to reach high-efficient radiating purpose, and then can solve the heat dissipation problem of motor, effectively avoid the pedestal overheated.

Preferably, the number of the adapting holes is one or two, and/or the adapting holes are round holes.

In order to solve the problem of detachable installation of the heat sink, preferably, the first connecting portion is a through hole or a bayonet. So that the detachable mounting of the heat sink is achieved using bolts.

Preferably, the bayonet is C-shaped or U-shaped, and the bayonet penetrates through the sidewall of the base plate.

For solving the demountable installation problem of the motor, preferably, the second connecting portion is a through hole or a threaded hole. So that the motor can be detachably mounted on the heat sink by using bolts.

In order to solve the problem of heat dissipation of the interior of the base body, the base plate is further provided with a plurality of heat dissipation holes. Through constructing the heat dissipation holes, the inner cavity of the seat body can be communicated with the outside through the heat dissipation holes, and therefore the air in the inner cavity can be subjected to heat convection with the outside air through the heat dissipation holes, and efficient heat dissipation is facilitated for the inside of the seat body.

Preferably, at least one row of heat dissipation holes are respectively arranged on two sides of the adapting hole.

In order to enhance the rigidity of the base plate, furthermore, a plurality of reinforcing strips are constructed on one side of the base plate, the reinforcing strips and the fins are located on the same side of the base plate, and the second connecting parts are respectively constructed on the base plate and penetrate through the corresponding reinforcing strips. Through setting up the reinforcing bar, can play the effect of strengthening to the base plate, be favorable to improving the structural rigidity of base plate, more be favorable to bearing the weight of motor and the load among the transmission process.

Preferably, the reinforcing bars are parallel to each other.

Preferably, the base plate and the fins are integrally formed, and/or the fins are vertically arranged on the base plate.

Preferably, the substrate is a rectangular plate.

A rotating base comprises a base body and a radiating fin, wherein the base body is provided with an inner cavity for accommodating a motor and a third connecting part matched with the first connecting part;

the radiating fin is arranged on the seat body through the matching of the first connecting part and the third connecting part, the radiating fin is positioned at one end of the inner cavity, and the adaptive hole is communicated with the inner cavity. In the scheme, the internal cavity is constructed, so that the motor is convenient to accommodate, a heat dissipation channel can be formed in the seat body, and the heat dissipation of the interior of the seat body is facilitated; through installing the fin in the one end of inside cavity, utilize the fin to show and increase heat radiating area, not only can carry out high-efficient heat dissipation for the motor that sets up in inside cavity, can guide the heat in the inside cavity to disperse from the fin and go out inside cavity moreover continuously, prevent that the heat from gathering in the roating seat, can effectively prevent that the too high problem of temperature from appearing in the roating seat.

In order to solve the problem of detachable installation of the heat sink, preferably, the third connecting portion is a through hole or a threaded hole formed in the base. So that the heat sink is mounted to the base of the rotary base using bolts.

The motor is mounted on the base plate through a bolt; the motor is located in the inner cavity, and an output shaft of the motor extends to the other side of the base plate through the adapting hole. In the scheme, the motor is directly arranged on the substrate of the radiating fins, so that the radiating parts can be matched with the motor and are tightly connected together, the radiating fins can play a role in absorbing heat, conducting heat and radiating heat, the radiating area of the motor can be effectively increased by the radiating fins, heat generated by the motor can be quickly and efficiently radiated out through the radiating fins, the heat is prevented from accumulating in the rotating seat, and the problem of overhigh temperature of the rotating seat can be effectively prevented; in addition, in the working process, the rotary seat can rotate and can drive the radiating fins to rotate, so that the rotation of the radiating fins can be utilized and the large-area radiating surface of the radiating fins is matched, and the radiating effect is further enhanced.

In order to form the internal cavity, preferably, the base body is provided with a support table, and a connector adaptive to the fixed seat is arranged below the support table, the connector is connected with the support table through two side parts, and the connector, the side parts and the support table jointly enclose the internal cavity;

the connector is constructed with a central hole, and the central hole is communicated with the inner cavity. In this scheme, through the structure connector, be convenient for install this roating seat in the fixing base of below, through the structure centre bore, on the one hand, make inside cavity can be linked together with the fixing base to the threading, arrange the drainage tube etc. on the other hand for the inside of aircraft nose down can communicate each other, is favorable to utilizing the inside of radiating part to whole aircraft nose down to dispel the heat.

For the detachable connection fixing base, preferably, the connector is of an annular structure, and the connector is provided with a plurality of connecting holes. The connecting holes are uniformly distributed along the circumferential direction of the connector respectively.

Preferably, the seat body is an integrally formed component; and/or the seat body is made of aluminum alloy.

A lower head of a sewing machine comprises the rotary seat.

In order to solve the problem that the rotating seat can rotate 360 to match with the upper machine head and realize perfect stitches, the utility model further comprises a fixed seat, the fixed seat comprises a fixed installation part and a connecting part which is matched with the seat body and can be rotationally restricted on the fixed installation part,

the base body is detachably mounted on the connecting portion. The rotating seat has a degree of freedom of rotation relative to the fixed seat so as to adjust the direction of the rotating shuttle, and perfect stitches can be realized by matching the rotating shuttle with the machine needle.

Compared with the prior art, the radiating fin, the rotary seat and the lower machine head of the sewing machine provided by the utility model have the advantages that the structure is simple and compact, the radiating fin and the rotary seat can be matched with the lower machine head of the sewing machine, and the motor in the rotary seat can be efficiently radiated, so that the problem of overheating of the seat body is effectively avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 conventional motor.

Fig. 2 is a schematic structural diagram of a heat sink in embodiment 1 of the present invention.

Fig. 3 is a second schematic structural diagram of a heat sink provided in embodiment 1 of the present invention.

Fig. 4 is a schematic view of the motor mounted to the heat sink provided in fig. 2.

Fig. 5 is a schematic partial structure view of a seat provided in embodiment 1 of the present invention.

Fig. 6 is a schematic view illustrating the heat sink provided in fig. 4 mounted on the base provided in fig. 5.

Fig. 7 is a front view of a heat sink provided in embodiment 2 of the present invention.

Fig. 8 is a three-dimensional structural view of a heat sink provided in embodiment 2 of the present invention.

Fig. 9 is a schematic view of the motor mounted to the heat sink provided in fig. 8.

Fig. 10 is a schematic partial structure view of a seat provided in embodiment 2 of the present invention.

Fig. 11 is a schematic view illustrating the heat sink provided in fig. 9 mounted on the base provided in fig. 10.

Fig. 12 is a structural view of a lower head provided in embodiment 3 of the present invention.

Description of the drawings

Heat sink 100, base plate 101, fitting hole 102, bayonet 103, second connecting part 104, fin 105, reinforcing bar 106, heat dissipation hole 107

Rotating seat 200, seat body 201, support table 202, connecting head 203, central hole 204, connecting hole 205, side portion 206, internal cavity 207, threaded hole 208 and partition 209

Motor 300, through hole 301 and output shaft 302

Fixing base 400, connecting portion, fixed mounting portion 402, bearing 403.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention 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 figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1 to 6, the present embodiment provides a heat sink for a sewing machine, including a base plate 101, wherein a plurality of fins 105 are configured on one side of the base plate 101, and each fin 105 may be disposed on the base plate 101 in parallel, as shown in fig. 2, in a preferred embodiment, the base plate 101 and the fins 105 may be integrally formed, and the fins 105 may be disposed on the base plate 101 perpendicularly, as shown in fig. 2, so as to increase a heat dissipation area by using the heat sink 100, thereby achieving a purpose of significantly improving a heat dissipation effect.

In practical implementation, the heat sink 100 needs to be installed on the seat body 201 of the rotating seat 200, and the shape of the base plate 101 in the heat sink 100 is adapted to the shape of the internal cavity 207 in the seat body 201, so as to be installed at one end of the internal cavity 207, in a preferred embodiment, the base plate 101 may be a rectangular plate, as shown in fig. 2 and fig. 3, the number of the fins 105 may be determined according to actual requirements, and the distance between two adjacent fins 105 may be controlled according to the amount of heat dissipation, which is not illustrated herein.

As shown in fig. 2 and 3, in the present embodiment, the base plate 101 is configured with an adaptation hole 102 adapted to the output shaft 302 of the motor 300, and the adaptation hole 102 penetrates the base plate 101, so that the output shaft 302 of the motor 300 can extend from one side of the base plate 101 to the other side, as shown in fig. 6, so as to connect transmission parts, such as a pulley in a belt transmission mechanism, a gear in a gear transmission mechanism, and the like;

the number of the adapting holes 102 can be determined according to the number of the motors 300 installed on the rotating base 200, and the number of the motors 300 installed on the base body 201 is usually one or two, so that the number of the adapting holes 102 can also be one or two, as shown in fig. 2 and 3; the shape of the adapting hole 102 is not limited in this embodiment, but in practical implementation, the adapting hole 102 may be a circular hole, as shown in fig. 2 and 3, and only needs to pass through the output shaft 302 of the motor 300, and of course, the adapting hole 102 may also be a square hole, an elliptical hole, and the like, which is not illustrated herein.

In order to facilitate the detachable installation of the heat sink 100 on the rotary base 200, in a further aspect, the substrate 101 is further configured with a plurality of first connecting portions for detachably connecting with the rotary base 200, and the first connecting portions have various embodiments, for example, the first connecting portions may be through holes configured on the substrate 101 so as to smoothly pass through bolts for detachable installation; for example, the first connection portion may be a bayonet 103 formed on the substrate 101, and in a specific implementation, the bayonet 103 may be C-shaped or U-shaped, and the bayonet 103 penetrates through a sidewall of the substrate 101, and as shown in fig. 2 and 6, the heat sink 100 may be detachably mounted by using bolts.

The number of the first connecting portions may be determined according to actual requirements, for example, as shown in fig. 2 and fig. 3, one first connecting portion is disposed at each of four corners of the substrate 101, and the first connecting portion is a C-shaped bayonet 103.

In order to facilitate direct mounting of the motor 300 on the heat sink 100 for enhancing the heat conduction effect, in a further aspect, the base plate 101 is further configured with a plurality of second connecting portions 104 for detachably mounting the motor 300, and the second connecting portions have various embodiments, for example, the second connecting portions 104 may be through holes for passing bolts, and for example, the second connecting portions 104 may also be threaded holes (i.e., through holes with internal threads) for connecting bolts by threads, so that not only the purpose of detachably mounting the motor 300 can be achieved, but also the motor 300 and the heat sink 100 can be tightly connected together.

The number of the second connection portions may be determined according to actual requirements, for example, as shown in fig. 2 and 3, four second connection portions are respectively and uniformly configured in the circumferential direction of the adaptation hole 102 so as to respectively correspond to the four through holes 301 at one end of the motor, so that the motor 300 can be mounted at the position corresponding to the adaptation hole 102 by using bolts, as shown in fig. 4.

Since the thinner the thickness of the substrate 101 is, the more advantageous the heat dissipation is, and when the thinner the substrate 101 is, the lower the rigidity of the substrate 101 is, the less advantageous the motor 300 is stably supported, in a further aspect, a plurality of reinforcing bars 106 are further configured on one side of the substrate 101, each reinforcing bar 106 and each fin 105 are respectively located on the same side of the substrate 101, as shown in fig. 2 and 6, and each second connecting portion is respectively configured on the substrate 101 and penetrates through the corresponding reinforcing bar 106, as shown in fig. 2 and 6, the reinforcing bar 106 can reinforce the substrate 101, thereby being beneficial to improving the structural rigidity of the substrate 101, and being more beneficial to bearing the weight of the motor 300 and the load during the transmission process.

The number of the reinforcing bars 106 may be determined according to actual requirements, and generally includes at least two reinforcing bars 106, and the reinforcing bars 106 may be parallel to each other, as shown in fig. 2, and the reinforcing bars 106 may preferably adopt a block-shaped structure, which can both perform the function of structural reinforcement and perform the function of heat dissipation.

Example 2

In order to solve the problem of dissipating heat inside the seat 201, the main difference between the embodiment 2 and the embodiment 1 is that in the heat sink 100 provided in this embodiment, the substrate 101 is further configured with a plurality of heat dissipating holes 107, as shown in fig. 7-11, by configuring the heat dissipating holes 107, the internal cavity 207 of the seat 201 can be communicated with the outside through the heat dissipating holes 107, so that air in the internal cavity 207 can perform heat convection with the outside air through the heat dissipating holes 107, which is beneficial to efficiently dissipating heat inside the seat 201.

In practical implementation, the heat dissipation holes 107 may preferably be circular holes or square holes, and the number of the heat dissipation holes 107 may be determined according to actual requirements, and when the number of the heat dissipation holes 107 is plural, the heat dissipation holes 107 may be arranged on the substrate 101 in a certain order, for example, in an embodiment, at least one row of heat dissipation holes 107 is respectively disposed at two sides of the adapting hole 102, and each row of heat dissipation holes 107 respectively includes at least two heat dissipation holes 107, as shown in fig. 7 and 8, and the distance between each row of heat dissipation holes 107 and the center of the adapting hole 102 may be greater than or equal to half of the width of the motor 300, so that after the motor 300 is mounted on the substrate 101 of the heat dissipation plate 100, the heat dissipation holes 107 that are not completely covered by the motor 300 may be communicated with the internal cavity 207 of the base 201, therefore, the air in the inner cavity 207 can exchange heat with the outside air through the heat dissipation holes 107 in a convection manner, and the purpose of dissipating heat of the inner cavity 207 of the base 201 is achieved.

Example 3

The present embodiment provides a rotating base 200, including the heat sink 100 described in embodiment 1 or embodiment 2, and further including a base 201, as shown in fig. 5, fig. 6, fig. 10, and fig. 11, where the base 201 may be an integrally formed component, for example, the base 201 may be an integrally formed component made of an aluminum alloy;

in order to accommodate the motor 300, the housing 201 is configured with an internal cavity 207 for accommodating the motor 300, as shown in fig. 5 and 10, so as to accommodate the motor 300, and a heat dissipation channel can be formed in the housing 201, which is more favorable for dissipating heat inside the housing 201; to form the internal cavity 207, in a preferred embodiment, the base 201 is configured with a support platform 202, and the support platform 202 can be configured horizontally with respect to the base 201, as shown in fig. 5 and 10;

as shown in fig. 5 and 10, a connector 203 adapted to the fixing base 400 is configured below the supporting base 202, so as to facilitate the installation of the rotating base 200 on the fixing base 400 below, and the connector 203 is connected to the supporting base 202 through two side portions 206, so that the connector 203, the side portions 206 and the supporting base 202 can jointly enclose the internal cavity 207.

As shown in fig. 5 and 10, the connector 203 is configured with a central hole 204, and the central hole 204 is communicated with the internal cavity 207, and by configuring the central hole 204, on one hand, the internal cavity 207 can be communicated with the fixing base 400 for threading, arranging a drainage tube and the like, and on the other hand, the interiors of the lower handpiece can be communicated with each other, which is beneficial to heat dissipation of the whole interior of the lower handpiece by using a heat dissipation component.

In specific implementation, the connection head 203 may preferably adopt a ring structure, and the connection head 203 is configured with a plurality of connection holes 205, and each connection hole 205 may be uniformly distributed along the circumferential direction of the connection head 203, so as to form a flange, which is convenient for detachably connecting the fixing base 400 by using bolts.

In order to facilitate installation of the heat sink 100, the base body 201 is further configured with a third connecting portion adapted to the first connecting portion, so that the heat sink 100 is installed on the base body 201 by matching the first connecting portion with the third connecting portion, and the heat sink 100 is located at one end of the internal cavity 207, and the adapting hole 102 is communicated with the internal cavity 207, and by installing the heat sink 100 at one end of the internal cavity 207, the heat sink 100 is utilized to significantly increase the heat dissipation area, which not only can perform efficient heat dissipation for the motor 300 disposed in the internal cavity 207, but also can continuously guide the heat in the internal cavity 207 to radiate out of the internal cavity 207 from the heat sink 100, thereby preventing the heat from accumulating in the rotary base 200, and effectively preventing the rotary base 200 from generating a problem of over-high temperature.

In a specific implementation, the third connecting portion may be a through hole or a threaded hole 208 configured on the base body 201, so as to mount the heat sink 100 on the base body 201 of the rotary base 200 by using a bolt; for example, as shown in fig. 5 and 10, third connection portions may be formed at the side portions 206 on both sides of the end of the internal cavity 207 in order to mount the heat sink 100 to the end of the internal cavity 207.

In a more sophisticated scheme, the motor 300 is further included, and the motor 300 can be mounted on the substrate 101 through bolts, as shown in fig. 4 and 9; at this time, the motor 300 is just positioned in the inner cavity 207, and the output shaft 302 of the motor 300 just extends to the other side of the base plate 101 through the fitting hole 102 so as to connect the transmission mechanism; by adopting the structure, the motor 300 is directly arranged on the substrate 101 of the heat sink 100, so that the heat dissipation part can be matched with the motor 300 and tightly connected together, the heat sink 100 can play a role in absorbing heat, conducting heat and dissipating heat, the heat dissipation area of the motor 300 can be effectively increased by the heat sink 100, heat generated by the motor 300 can be quickly and efficiently dissipated out through the heat sink 100, heat accumulation in the rotary base 200 is prevented, and the problem of overhigh temperature of the rotary base 200 can be effectively prevented; in addition, during the operation, the rotary base 200 rotates and drives the heat sink 100 to rotate, so that the rotation of the heat sink 100 can be utilized to match with the large-area heat dissipation surface of the heat sink 100, thereby further enhancing the heat dissipation effect.

The base body 201 of the rotary base 200 is further provided with a rotating shuttle mechanism and a thread cutting mechanism, the number of the motors 300 can be one, and at the moment, the rotating shuttle mechanism and the thread cutting mechanism can share the motor 300 as a power source; however, in a preferred embodiment, the number of the motors 300 may be two, and in this case, the rotating shuttle mechanism and the thread cutting mechanism respectively use one motor 300 as a power source, specifically, the rotating shuttle mechanism includes a rotating shuttle shaft rotatably mounted on the base 201 and a rotating shuttle mounted on the rotating shuttle shaft, the rotating shuttle is located above the support platform 202, and in this case, a motor one mounted on the heat sink 100 may be in transmission connection with the rotating shuttle shaft through a first transmission mechanism so as to drive the rotating shuttle to rotate by the motor one; the first transmission mechanism can be one or a combination of two of a belt transmission mechanism and a gear transmission mechanism; similarly, the thread cutting mechanism comprises a first cutter and a second cutter which are matched with each other, at the moment, a second motor arranged on the radiating fin 100 can be in transmission connection with the first cutter and the second cutter through a second transmission mechanism, and the second motor is used for driving the first cutter and the second cutter to open/close so as to achieve the purpose of cutting threads when the second cutter is closed; in a specific implementation, the second transmission mechanism can be one or more of a belt transmission mechanism, a gear transmission mechanism or a cam transmission mechanism.

Further, when the internal cavity 207 is provided with two motors 300 (i.e., motor one and motor two), the internal cavity 207 may be partitioned by a partition 209, as shown in fig. 10 and 11, so that the two motors 300 may be disposed side by side in the internal cavity 207.

Example 4

This embodiment provides a lower handpiece comprising the rotary base 200 described in embodiment 3, as shown in fig. 12.

In order to enable the rotary seat 200 to rotate 360 to match the upper machine head and achieve perfect stitch, in a further embodiment, the lower machine head further includes a fixed seat 400, as shown in fig. 12, the fixed seat 400 includes a fixed mounting portion 402, a connecting portion 401 adapted to the seat body 201 and rotatably constrained to the fixed mounting portion 402 (for example, the connecting portion 401 may be mounted to the fixed mounting portion 402 through a bearing 403 so as to achieve separation of movement, as shown in fig. 12), and the seat body 201 is detachably mounted to the connecting portion 401 so as to be connected with the connecting portion 401 as a whole, so that the rotary seat 200 has a degree of freedom of rotation relative to the fixed mounting portion 402 so as to adjust the orientation of the rotary hook, so that perfect stitch can be achieved by matching the rotary hook with the machine needle.

Example 5

This embodiment provides a sewing machine, including the lower head described in embodiment 4, and further including a frame and a motor (i.e., the motor 300), the fixed mounting portion 402 is fixedly mounted to the frame, so as to fix and mount the entire lower head, and the motor is used to drive the connecting portion 401 to rotate relative to the fixed mounting portion 402.

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

Claims (10)

1. A heat sink for a sewing machine is characterized by comprising a base plate, wherein a plurality of fins are formed on one side of the base plate,

the base plate is provided with an adaptive hole matched with the output shaft of the motor, and the adaptive hole penetrates through the base plate;

the base plate is further constructed with a plurality of first connecting portions for detachably connecting the rotary base and a plurality of second connecting portions for detachably mounting the motor.

2. A heat sink for a sewing machine according to claim 1, wherein the number of the fitting holes is one or two;

and/or the adapting hole is a round hole;

and/or the base plate and the fins are integrally formed;

and/or the fins are vertically arranged on the substrate.

3. A heat sink for a sewing machine according to claim 1, wherein the first connecting portion is a through hole or a bayonet;

and/or the second connecting part is a through hole or a threaded hole.

4. The heat sink as claimed in claim 3, wherein the bayonet is C-shaped or U-shaped and the bayonet penetrates a sidewall of the base plate.

5. A heat sink fin according to any one of claims 1 to 4, wherein said base plate is further configured with a plurality of heat dissipating holes.

6. A heat sink fin for a sewing machine according to claim 5, wherein at least one row of said heat dissipation holes is provided on both sides of said fitting hole, respectively.

7. The heat sink as claimed in any one of claims 1 to 4, wherein a plurality of reinforcing bars are formed on one side of the base plate, and the reinforcing bars and the fins are located on the same side of the base plate, and the second connecting portions are formed on the base plate and penetrate through the corresponding reinforcing bars.

8. A swivel base comprising a base body and the heat sink of any of claims 1-7, the base body configured with an internal cavity for receiving a motor and a third connecting portion adapted to the first connecting portion;

the radiating fin is arranged on the seat body through the matching of the first connecting part and the third connecting part, the radiating fin is positioned at one end of the inner cavity, and the adaptive hole is communicated with the inner cavity.

9. The rotary base of claim 8, wherein the third connecting portion is a through hole or a threaded hole formed in the base body;

and/or the presence of a gas in the gas,

the seat body is provided with a support table, a connector adaptive to the fixed seat is arranged below the support table, the connector is connected with the support table through two side parts, the connector, the side parts and the support table jointly enclose the inner cavity, the connector is provided with a central hole, and the central hole is communicated with the inner cavity;

and/or the presence of a gas in the gas,

the motor is arranged on the base plate through bolts and located in the inner cavity, and an output shaft of the motor extends to the other side of the base plate through the matching hole.

10. Lower head of a sewing machine, characterized in that it comprises a rotating seat according to claim 8 or 9.

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