阅读说明：本技术 一种缝纫机的联轴器 (Coupler of sewing machine ) 是由 陈文强 于 2021-10-12 设计创作，主要内容包括：本发明公开了一种缝纫机的联轴器,包括主动端和从动端,主动端包括第一轴套、沿第一轴套径向延伸形成的第一轴肩、与第一轴肩连接的连接套筒,第一轴套设置有第一轴孔；从动端包括第二轴套、沿第二轴套径向延伸形成的第二轴肩,第二轴套与第一轴套连接,第二轴套设置有第二轴孔,第一轴肩沿圆周均匀设置有若干个通孔,第二轴肩沿圆周均匀设置有若干个滑槽；还包括螺杆,螺杆穿过通孔和滑槽,螺杆穿过滑槽的一端固定连接有螺母；联轴器的主动端和从动端之间的连接结构能够巧妙的对角偏移和轴偏移进行补偿；且能够根据不同的两轴端间距适应性调节联轴器自身的长度,以形成良好的配合连接,因此更具使用的普遍性和灵活性。(The invention discloses a coupler of a sewing machine, which comprises a driving end and a driven end, wherein the driving end comprises a first shaft sleeve, a first shaft shoulder and a connecting sleeve, the first shaft shoulder is formed by extending along the radial direction of the first shaft sleeve, the connecting sleeve is connected with the first shaft shoulder, and the first shaft sleeve is provided with a first shaft hole; the driven end comprises a second shaft sleeve and a second shaft shoulder formed by extending along the radial direction of the second shaft sleeve, the second shaft sleeve is connected with the first shaft sleeve, the second shaft sleeve is provided with a second shaft hole, the first shaft shoulder is uniformly provided with a plurality of through holes along the circumference, and the second shaft shoulder is uniformly provided with a plurality of sliding grooves along the circumference; the screw rod penetrates through the through hole and the sliding groove, and one end of the screw rod penetrating through the sliding groove is fixedly connected with a nut; the connecting structure between the driving end and the driven end of the coupler can compensate the angle offset and the shaft offset skillfully; and the length of the coupler can be adjusted according to the adaptability of the distance between the two different shaft ends to form good matching connection, so that the coupler has universality and flexibility in use.)

1. A coupler of a sewing machine is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the driving end (100) comprises a first shaft sleeve (101), a first shaft shoulder (102) formed by extending along the radial direction of the first shaft sleeve (101), and a connecting sleeve (103) connected with the first shaft shoulder (102), wherein the first shaft sleeve (101) is provided with a first shaft hole (101 a);

the driven end (200) comprises a second shaft sleeve (201) and a second shaft shoulder (202) formed by extending along the radial direction of the second shaft sleeve (201), the second shaft sleeve (201) is connected with the first shaft sleeve (101), and a second shaft hole (201 a) is formed in the second shaft sleeve (201).

2. The coupler of a sewing machine according to claim 1, wherein: the first shaft shoulder (102) is uniformly provided with a plurality of through holes (102 a) along the circumference, and the second shaft shoulder (202) is uniformly provided with a plurality of sliding grooves (202 a) along the circumference;

the screw rod (104) penetrates through the through hole (102 a) and the sliding groove (202 a), and one end, penetrating through the sliding groove (202 a), of the screw rod (104) is fixedly connected with a nut (104 a).

3. The coupler of a sewing machine according to claim 2, wherein: one end, connected with the first shaft shoulder (102), of the connecting sleeve (103) extends towards the shaft center to form a connecting boss (103 a), a connecting hole (103 b) corresponding to the through hole (102 a) is formed in the connecting boss (103 a), and the connecting hole (103 b) is connected with the through hole (102 a) through a screw (104).

4. The coupler of a sewing machine according to claim 3, wherein: the sliding groove (202 a) is a cylindrical groove, the axis of the sliding groove is perpendicular to the axis of the second shaft sleeve (201), the side surface of the sliding groove (202 a) penetrates through two end surfaces of the second shaft shoulder (202), a ball body (203) is arranged in the sliding groove (202 a), a through hole (203 a) is formed in the ball body (203), and the screw rod (104) penetrates through the through hole (203 a) and is in clearance fit with the through hole; the ball (203) is in clearance fit with the sliding groove (202 a);

the surface of the second shoulder (202) contacting the inner wall of the connecting sleeve (103) is a spherical surface (202 b), and the diameter of the spherical surface (202 b) is not larger than the inner diameter of the connecting sleeve (103).

5. The coupler of a sewing machine according to claim 4, wherein: a first spring (105) is arranged between the ball body (203) and the first shaft shoulder (102), and the first spring (105) is sleeved on the screw rod (104);

a second spring (106) is arranged between the ball body (203) and the second shaft shoulder (202), and the second spring (106) is sleeved on the screw rod (104).

6. A coupling of a sewing machine according to claim 4 or 5, wherein: one end, located on the second shaft sleeve (201), of the connecting sleeve (103) is connected with a limiting cover plate (204), the limiting cover plate (204) is provided with an offset hole (204 a), and the diameter of the offset hole (204 a) is larger than that of the second shaft sleeve (201);

the limiting cover plate (204) is provided with a limiting hole (204 b) coaxial and corresponding to the through hole (102 a), and the screw rod (104) sequentially penetrates through the connecting hole (103 b), the through hole (102 a) and the limiting hole (204 b) and is fixed through the nut (104 a).

7. The coupler of a sewing machine of claim 6, wherein: a round ball (205) is fixedly connected in the second shaft sleeve (201), and the axis of the sliding groove (202 a) penetrates through the spherical center of the round ball (205);

the ball-shaped connector also comprises a movable piece (206), one end of the movable piece (206) is provided with a spherical groove (206 a), and the round ball (205) is embedded into the spherical groove (206 a) and movably connected with the spherical groove; the other end of the moving piece (206) is cylindrical and is uniformly provided with a plurality of pin holes (206 b) along the axial direction, one end, close to the second shaft sleeve (201), of the first shaft sleeve (101) is connected with a bulge (107), the bulge (107) is provided with a limiting groove (107 a) and a positioning hole (107 b) which penetrates through the limiting groove (107 a) in the radial direction, one end of the moving piece (206) is embedded into the limiting groove (107 a), and one of the pin holes (206 b) is coaxial with the positioning hole (107 b) and is connected through a positioning pin (108); the distance between the centers of two adjacent pin holes (206 b) is larger than the radius of the pin holes (206 b).

8. The coupler of a sewing machine of claim 7, wherein: the first shaft hole (101 a) is connected with a driving shaft (109) and is positioned through a key and a fastening screw.

9. The coupler of a sewing machine of claim 8, wherein: the second shaft hole (201 a) is connected with a driven shaft (207) and is positioned through a key and a fastening screw.

10. The coupler of a sewing machine of claim 9, wherein: the number of the through holes (102 a) is 4.

Technical Field

The invention relates to the field of couplers, in particular to a coupler of a sewing machine.

Background

At present, direct drive sewing machines have become a trend. The main structure of the direct-drive sewing machine is that a main shaft is directly connected with a motor shaft of a motor, and the motor shaft rotates to drive the main shaft to rotate, so that the direct-drive sewing machine has the following advantages: firstly, energy and electricity are saved, secondly, the sewing machine is safer than a belt wheel type motor, thirdly, the efficiency of the sewing machine can be improved, fourthly, the structure of the sewing machine is more compact, and the sewing machine is convenient to install; the shaft coupling couples the driving shaft and the driven shaft to transmit rotary motion from the driving shaft to the driven shaft, and the driving shaft and the driven shaft are not completely coaxial due to the influence of factors such as manufacturing and assembling, and relative offset in radial direction, axial direction or angle always exists between the two shafts. In order to ensure stable transmission between the two shafts, the coupling needs to have certain offset compensation capability.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and in this section as well as in the abstract and the title of the invention of this application some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made keeping in mind the above problems occurring in the prior art and/or the problems occurring in the prior art.

Therefore, the technical problem to be solved by the invention is that relative offset of axial direction or angle always exists between two shafts of the coupler of the sewing machine.

In order to solve the technical problems, the invention provides the following technical scheme: a coupler of a sewing machine comprises a driving end and a driven end, wherein the driving end comprises a first shaft sleeve, a first shaft shoulder and a connecting sleeve, the first shaft shoulder is formed by extending along the radial direction of the first shaft sleeve, the connecting sleeve is connected with the first shaft shoulder, and a first shaft hole is formed in the first shaft sleeve;

the driven end comprises a second shaft sleeve and a second shaft shoulder formed by extending along the radial direction of the second shaft sleeve, the second shaft sleeve is connected with the first shaft sleeve, and a second shaft hole is formed in the second shaft sleeve.

As a preferable aspect of the coupler of the sewing machine of the present invention, wherein: the first shaft shoulder is uniformly provided with a plurality of through holes along the circumference, and the second shaft shoulder is uniformly provided with a plurality of sliding grooves along the circumference;

the screw rod penetrates through the through hole and the sliding groove, and a nut is fixedly connected to one end, penetrating through the sliding groove, of the screw rod.

As a preferable aspect of the coupler of the sewing machine of the present invention, wherein: one end of the connecting sleeve connected with the first shaft shoulder extends to the shaft center to form a connecting boss, the connecting boss is provided with a connecting hole corresponding to the through hole, and the connecting hole is connected with the through hole through a screw rod.

As a preferable aspect of the coupler of the sewing machine of the present invention, wherein: the sliding groove is a cylindrical groove, the axis of the sliding groove is perpendicular to the axis of the second shaft sleeve, the side face of the sliding groove is penetrated through two end faces of the second shaft shoulder, a ball body is arranged in the sliding groove, a through hole is formed in the ball body, and the screw rod penetrates through the through hole and is in clearance fit with the through hole; the ball body is in clearance fit with the sliding groove;

the surface of the second shaft shoulder, which is in contact with the inner wall of the connecting sleeve, is a spherical surface, and the diameter of the spherical surface is not larger than the inner diameter of the connecting sleeve.

As a preferable aspect of the coupler of the sewing machine of the present invention, wherein: a first spring is arranged between the ball body and the first shaft shoulder, and the first spring is sleeved on the screw rod;

and a second spring is arranged between the ball body and the second shaft shoulder, and the screw rod is sleeved with the second spring.

As a preferable aspect of the coupler of the sewing machine of the present invention, wherein: one end, located on the second shaft sleeve, of the connecting sleeve is connected with a limiting cover plate, the limiting cover plate is provided with an offset hole, and the diameter of the offset hole is larger than that of the second shaft sleeve;

the limiting cover plate is provided with a limiting hole coaxial and corresponding to the through hole, and the screw rod sequentially penetrates through the connecting hole, the through hole and the limiting hole and is fixed through the nut.

As a preferable aspect of the coupler of the sewing machine of the present invention, wherein: a round ball is fixedly connected in the second shaft sleeve, and the axis of the sliding groove penetrates through the spherical center of the round ball;

the ball-shaped ball is embedded into the spherical groove and movably connected with the spherical groove; the other end of the moving part is cylindrical and is uniformly provided with a plurality of pin holes along the axial direction, one end of the first shaft sleeve, which is close to the second shaft sleeve, is connected with a bulge, the bulge is provided with a limiting groove and a positioning hole which is radial and penetrates through the limiting groove, one end of the moving part is embedded into the limiting groove, and one pin hole positioning hole is coaxial and is connected through a positioning pin; the distance between the centers of two adjacent pin holes is larger than the radius of the pin holes.

As a preferable aspect of the coupler of the sewing machine of the present invention, wherein: the first shaft hole is connected with a driving shaft and is positioned through a key and a fastening screw.

As a preferable aspect of the coupler of the sewing machine of the present invention, wherein: the second shaft hole is connected with a driven shaft and is positioned through a key and a fastening screw.

As a preferable aspect of the coupler of the sewing machine of the present invention, wherein: the through-hole is provided with 4.

The invention has the beneficial effects that: the connecting structure between the driving end and the driven end of the coupler can compensate the angle offset and the shaft offset skillfully; the length of the coupler can be adaptively adjusted according to the distance between the two different shaft ends to form good matching connection, so that the coupler disclosed by the invention has universality and flexibility in use.

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 description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a schematic structural view of a coupler of a sewing machine according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view illustrating a coupling of a sewing machine according to an embodiment of the present invention;

FIG. 3 is a schematic view of an exploded structure of a coupler of a sewing machine according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram illustrating an angular shift operation principle of a coupler of a sewing machine according to an embodiment of the present invention.

In the figure: an active end 100; a first bushing 101; a first shoulder 102; a connecting sleeve 103; a first shaft hole 101 a; a driven end 200; a second bushing 201; a second shoulder 202; the second shaft hole 201 a; a through hole 102 a; a chute 202 a; a screw 104; a nut 104 a; a connection boss 103 a; a connection hole 103 b; a sphere 203; a through hole 203 a; a spherical surface 202 b; a first spring 105; a second spring 106; a limiting cover plate 204; offset holes 204 a; a stopper hole 204 b; a sphere 205; a movable member 206; a spherical groove 206 a; pin holes 206 b; a protrusion 107; a limit groove 107 a; positioning holes 107 b; a positioning pin 108; a drive shaft 109; a driven shaft 207.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Examples

Referring to fig. 1 to 4, the present embodiment provides a coupler for a sewing machine, including a driving end 100 and a driven end 200, where the driving end 100 is connected to an output shaft of a driving motor of the sewing machine, and the output shaft transmits power to an input shaft of a working machine connected to the driven end 200 through the coupler.

Specifically, the driving end 100 includes a first shaft sleeve 101, a first shaft shoulder 102 formed by extending along a radial direction of the first shaft sleeve 101, and a connecting sleeve 103 connected with the first shaft shoulder 102, wherein the first shaft sleeve 101 is provided with a first shaft hole 101 a; the first shaft sleeve 101 is fixedly connected with an output shaft of a driving motor, the driven end 200 comprises a second shaft sleeve 201 and a second shaft shoulder 202 formed by extending along the radial direction of the second shaft sleeve 201, the second shaft sleeve 201 is connected with the first shaft sleeve 101, the second shaft sleeve 201 is provided with a second shaft hole 201a, and the second shaft sleeve 201 is connected with the input shaft of the working machine. The first hub 101 and the second hub 201 combine to form a coupling.

Further, the first shoulder 102 is uniformly provided with a plurality of through holes 102a along the circumference, in this embodiment, there are 4 through holes 102a, it should be noted that there are at least 3 through holes 102 a; correspondingly, the second shaft shoulder 202 is uniformly provided with a plurality of sliding grooves 202a along the circumference; and the position of each slide groove 202a corresponds to the position of the through hole 102 a.

The driving end 100 further includes a screw 104, the screw 104 passes through the through hole 102a and the sliding groove 202a, and one end of the screw 104 passing through the sliding groove 202a is fixedly connected with a nut 104 a. Then, the first sleeve 101 and the second sleeve 201 are connected by the screw 104 and power transmission is performed.

Preferably, one end of the connecting sleeve 103 connected with the first shoulder 102 extends to the axial center to form a connecting boss 103a, the connecting boss 103a is provided with a connecting hole 103b corresponding to the through hole 102a, and the connecting hole 103b is connected with the through hole 102a through a screw 104; the connecting sleeve 103 connects the first sleeve 101 and the second sleeve 201 through the screw 104, and makes the three move in the same process.

It should be noted that the sliding groove 202a is a cylindrical groove and the axis is perpendicular to the axis of the second collar 201, the side surface of the sliding groove 202a penetrates through two end surfaces of the second collar 202, a ball 203 is arranged in the sliding groove 202a, the ball 203 is provided with a through hole 203a, and the screw 104 penetrates through the through hole 203a and is in clearance fit; the ball 203 is in clearance fit with the chute 202 a; therefore, the balls 203 can move radially along the second sleeve 201 in the sliding slot 202a, that is, once an angular offset occurs between the driving end 100 and the driven end 200, the second sleeve 201 will tilt, and correspondingly, the position of each ball 203 in the screw 104 and the sliding slot 202a will also change adaptively to adapt to the overall angular offset, and if one of the balls 203 is offset toward the driving end 100, the ball 203 at the diagonal position with the one ball 203 will be offset toward the driven end 200, and the transmission operation can be performed normally.

Preferably, the surface of the second shoulder 202 contacting the inner wall of the connection sleeve 103 is a spherical surface 202b, and the diameter of the spherical surface 202b is not larger than the inner diameter of the connection sleeve 103, so as to prevent the second shoulder 202 from interfering when moving inside the connection sleeve 103.

Preferably, a first spring 105 is arranged between the ball 203 and the first shoulder 102, and the first spring 105 is sleeved on the screw 104; the second spring 106 is arranged between the sphere 203 and the second shaft shoulder 202, the second spring 106 is sleeved on the screw 104, the first spring 105 and the second spring 106 are pressure springs and can play a role in shock absorption and shock absorption, and meanwhile, when the driven shaft of the driven end 200 deviates along the axial direction, the sphere 203 can also be adjusted in adaptability under the action of the first spring 105 and the second spring 106.

Furthermore, one end of the connecting sleeve 103, which is located on the second bushing 201, is connected with a limiting cover plate 204, and the limiting cover plate 204 is used for fixing the position of the screw 104 to prevent the screw 104 from deviating; the limiting cover plate 204 is provided with an offset hole 204a, the diameter of the offset hole 204a is larger than that of the second shaft sleeve 201, and when the driven end 200 is subjected to angular offset, the offset hole 204a can provide an offset movable range of the driven end 200; the limiting cover plate 204 is provided with a limiting hole 204b coaxial and corresponding to the through hole 102a, and the screw 104 sequentially passes through the connecting hole 103b, the through hole 102a and the limiting hole 204b and is fixed through the nut 104 a. Only the second bushing 201 can then be angularly and axially offset, wherein the second shoulder 202 is located inside the connecting sleeve 103.

Preferably, a round ball 205 is fixedly connected in the second shaft sleeve 201, wherein the axis of the sliding groove 202a passes through the center of the round ball 205; therefore, no matter how the second shaft sleeve 201 deviates, the center of the spherical ball 205 is located on the axis of the connecting sleeve 103, that is, the spherical ball 205 itself can only move along the axis direction of the connecting sleeve 103, and the universal joint further comprises a movable member 206, the movable member 206 is connected with the spherical ball 205 to form a universal joint, one end of the movable member 206 is provided with a spherical groove 206a, and the spherical ball 205 is embedded into the spherical groove 206a and movably connected to form the universal joint.

Furthermore, the other end of the moving part 206 is cylindrical and is uniformly provided with a plurality of pin holes 206b along the axial direction, one end of the first shaft sleeve 101 close to the second shaft sleeve 201 is connected with a bulge 107, the bulge 107 is provided with a limit groove 107a and a positioning hole 107b which radially penetrates along the limit groove 107a, one end of the moving part 206 is embedded into the limit groove 107a, and one pin hole 206b is coaxial with the positioning hole 107b and is connected with the positioning hole through a positioning pin 108; the distance between the centers of two adjacent pin holes 206b is larger than the radius of the pin holes 206 b. Therefore, the distance between the driving end 100 and the driven end 200 is different due to the matching of the pin holes 206b and the positioning holes 107b at different positions, so that the position of the movable member 206 mounted in the protrusion 107 can be adjusted according to the length of the driving shaft 109 or the driven shaft 207.

Therefore, when the driven shaft 207 is likely to have axial deviation, the positioning pin 108 is not needed for axial positioning, and the coupler can simultaneously adapt to angular deviation and axial deviation; when axial deflection of driven shaft 207 has been limited, the position of moveable member 206 within projection 107 may be fixed according to the length of the shaft, thereby accommodating different shaft lengths and angular deflections.

It should be noted that the first shaft hole 101a is connected with the driving shaft 109 and is positioned by a key and a fastening screw, the second shaft hole 201a is connected with the driven shaft 207 and is positioned by a key and a fastening screw, and the installation mode of the shafts is not described again for the prior art; and 4 through holes 102a are provided in the present embodiment, but not limited to 4 through holes.

The implementation manner of the embodiment is as follows: in the present embodiment, the following embodiments are provided for the angular offset, the axial offset, and the shaft length that may occur during the transmission of the driving shaft 109 and the driven shaft 207 of the sewing machine; when the length of the shaft is uncertain and angular deviation occurs, the position of the movable piece 206 does not need to be fixed, the driving end 100 and the driven end 200 are normally installed, and when the angular deviation occurs in the operation process, the deviation and shock absorption can be compensated by the matching of the second shoulder 202 and the ball 203; in another embodiment, the driven end 200 is not cheap in axial direction, and only has angular offset, so that one end of the movable element 206 can be fixed in the positioning hole 107b according to the length of the shaft, and the position of the spherical center of the spherical ball 205 fixedly connected in the second shaft sleeve 201 is unchanged no matter how the driven end 200 swings, so that the angular offset can be compensated through the matching of the second shaft sleeve 201 and the spherical ball 203, and the rotation transmission of the sewing machine is not influenced.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.