WO2017128290A1

WO2017128290A1 - Outer shuttle frame and rotating shuttle

Info

Publication number: WO2017128290A1
Application number: PCT/CN2016/072747
Authority: WO
Inventors: 方铎
Original assignee: 中山市旋霸缝纫设备有限公司
Priority date: 2016-01-29
Filing date: 2016-01-29
Publication date: 2017-08-03

Abstract

Provided are an outer shuttle frame (3) and a rotating shuttle (2) mounted in said outer shuttle (3); the outer shuttle (3) comprises a driving-force receiving part (34) for receiving a rotational driving force, and an inner-shuttle-frame accommodating chamber (31); the peripheral wall of the inner shuttle accommodating chamber (31) is provided with a groove (32) used for slidably fitting with the inner shuttle frame (4); the driving-force receiving part (34) is provided with a solid sealed oil-storage chamber (6); the oil storage chamber (6) is in communication with the groove (32) by means of an oil path (62). The rotating shuttle (2) also comprises a flow control device (7); the flow control device (7) is mounted on the outer shuttle (3) and used for controlling the flow of the oil path (62).

Description

Outer shuttle and hook

Technical field

The present invention relates to the field of sewing machine equipment, and more particularly to an outer shuttle frame for a sewing machine and a hook with an outer shuttle frame.

Background technique

The sewing machine is provided with a hook on the lower side of the needle plate. The hook includes an outer shuttle and an inner shuttle. The outer shuttle rotates integrally with the shaft as the needle moves up and down, and rotatably supports the inner shuttle. The inner shuttle can rotate independently of the outer shuttle and includes a shuttle at its outer peripheral portion. The shuttle portion is engaged with the stop shuttle included in the sewing machine for stopping the rotation of the inner shuttle frame so that the inner shuttle frame does not rotate synchronously with the outer shuttle frame. The needle thread of the needle thread is inserted into the needle. The outer shuttle of the sewing machine captures the upper thread of the needle passing through the fabric, and the upper thread is interlaced with the bottom thread held by the inner shuttle in the stopped state to perform sewing.

The existing lubrication system with a lubrication system has two lubrication methods. The first one is to apply oil to the oil circuit of the rotary hook through an external oil pump, and the second is to provide a lubricating oil receiving cavity on the outer shuttle frame, relying on The centrifugal force of the outer shuttle frame rotating around its axis supplies oil to the oil passage. The first lubrication method is not easy to achieve precise control due to the pressure of the oil pump. If the oil pressure is too large during lubrication, the lubricant may be sprayed outside or outside. Leakage, which will cause serious pollution to the textile fabric. If the oil pressure is too small during lubrication, the oil supply will be insufficient, thus damaging the hook. The second lubrication method relies on the centrifugal force on the outer shuttle to rotate. For oil supply, when the rotation speed is too fast, the oil supply will be too fast, which will cause pollution to the textile fabric.

technical problem

In order to solve the above problems, it is a first object of the present invention to provide an outer shuttle frame that can precisely control the flow rate of lubricating oil and avoid oil leakage.

A second object of the present invention is to provide a hook that can precisely control the flow rate of lubricating oil and avoid oil leakage.

Technical solution

In order to achieve the first object of the present invention, the present invention provides an outer shuttle frame including a driving force receiving portion that receives a rotational driving force and an inner shuttle housing receiving chamber, and a peripheral wall of the inner shuttle housing receiving chamber is provided for sliding with the inner shuttle frame The matching groove portion, the driving force receiving portion is provided with a substantially sealed oil storage chamber, and the oil storage chamber is connected to the groove portion through the oil passage, wherein the rotary hook further comprises a flow control device, the flow control device is mounted on the outer shuttle frame, and the flow control The device is used to control the flow of the oil circuit.

In a further aspect, the oil passage includes a tunnel assembly disposed through the outer wall of the outer shuttle frame, and the flow control device is disposed through the bore assembly.

In a further aspect, the tunnel assembly includes a first through hole and a second through hole disposed in the peripheral wall, and the second through hole communicates between the first through hole and the oil reservoir.

In a further aspect, the tunnel assembly further includes a third through hole in communication with the first through hole.

In a further aspect, the flow control device includes a screw, and the screw is provided with a flow channel at a position at the oil passage.

In a further aspect, the flow control device includes a flow control plug, and the flow control plug is installed in the oil passage.

Still further, the flow control device includes an adjustment member that is rotatably or slidably mounted on the oil passage, and the adjustment member is provided with a flow passage that communicates with the oil passage.

A further solution is that the flow control device comprises a push rod, a first elastic member and a first sealing ring, wherein the pushing rod is slidably installed in the oil path, and the first sealing ring is fixedly mounted on the outer wall of the outer shuttle frame, and is pushed up. The rod slidably passes through the first sealing ring, the first end of the first elastic member abuts the head of the ejector rod, the second end of the first elastic member abuts the first sealing ring, and the head of the ejector rod The part is adjacent to the peripheral wall of the oil passage.

A further solution is that the flow control device comprises a push rod and a second sealing ring, the push rod is rotatably mounted in the oil path, and the second sealing ring is fixedly mounted on the outer wall of the outer shuttle frame, and the push rod is rotatably passed through the first The second sealing ring, the head of the putter, is adjacent to the peripheral wall of the oil circuit.

In order to achieve the second object of the present invention, the present invention provides a rotary hook including an outer shuttle frame, an inner shuttle frame and a pressing piece, the inner shuttle frame being mounted in the inner shuttle frame receiving cavity, the inner shuttle frame Provided on the groove portion and rotatable independently of the outer shuttle frame along the groove portion, the pressing piece comprising a peripheral wall and a buckle edge at an axial end of the peripheral wall, the pressing piece being mounted on the outer shuttle On the outer wall of the frame, the buckle is engaged with the inner shuttle, wherein the outer shuttle is the outer shuttle in any of the above aspects.

Beneficial effect

The outer shuttle frame and the rotary hook provided by the invention provide a flow control device on the rotary hook, and by adjusting the flow control device, the flow rate in the oil passage can be controlled, and at the same time, the maximum flow rate can be controlled, and then the realization is realized. Accurately control the flow of lubricating oil to prevent the textile fabric from being polluted due to excessive rotation when the outer shuttle is rotated.

In addition, the hole assembly is formed by a plurality of through holes of different forms, which not only provides convenience in processing, but also the arrangement of the holes can provide a mounting position for the flow control device, and the flow control device can be realized by moving or rotating the through hole. The control of the flow rate and the opening through the outer wall facilitate the convenience of operating the flow control device.

Moreover, the flow groove is opened by the screw, and the processing is simple and low in cost, so that the flow rate of the oil passage can be conveniently controlled by the rotation of the screw.

In addition, the flow control device includes a flow control plug that can control the flow in the oil circuit at different speeds by controlling flow control pins of different diameters, such as when the outer shuttle frame rotates between 7000 and 7500 rpm, the installation diameter is 0.96 mm flow control pin, when the outer shuttle rotates between 8000 rpm and 9000 rpm, a flow control pin with a diameter of 0.98 mm is installed.

At the same time, the flow rate in the oil passage is controlled by adjusting the adjusting member to control the overlapping area of the first end opening of the flow passage and the outlet end of the oil passage in the oil reservoir.

In addition, the centrifugal force of the outer shuttle frame causes the overlapping volume of the conical tip end of the ejector pin and the space at the outlet end of the oil passage in the oil reservoir to control the flow rate in the control oil passage, and can be controlled by selecting elastic members with different elastic coefficients. The size of different flows at the same speed.

Moreover, by adjusting the push rod, the head of the push rod changes the size of the flow to the outlet end of the oil passage in the oil reservoir, thereby realizing the flow rate in the control oil passage.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a structural view showing a first embodiment of a hook of the present invention.

Figure 2 is a structural view of another embodiment of the first embodiment of the hook of the present invention.

Figure 3 is an exploded view of the first embodiment of the hook of the present invention.

Figure 4 is an exploded perspective view showing the outer shuttle of the first embodiment of the hook of the present invention.

Figure 5 is a cross-sectional view showing a first embodiment of the hook of the present invention.

Figure 6 is a cross-sectional view showing the working state of the second embodiment of the hook of the present invention.

Fig. 7 is a partial enlarged view of a portion A of Fig. 6.

Figure 8 is a cross-sectional view showing the second embodiment of the hook of the present invention in a non-operating state.

Figure 9 is a partial enlarged view of B of Figure 8.

Figure 10 is a cross-sectional view showing the third embodiment of the hook of the present invention in a non-operating state.

Figure 11 is a partial enlarged view of the portion C of Figure 10 .

Figure 12 is a cross-sectional view showing the working state of the third embodiment of the hook of the present invention.

Figure 13 is a partial enlarged view of the portion D of Figure 12 .

Figure 14 is a cross-sectional view showing the fourth embodiment of the hook of the present invention in a non-operating state.

Figure 15 is a partial enlarged view of E at Figure 14.

Figure 16 is a cross-sectional view showing the working state of the fourth embodiment of the hook of the present invention.

Figure 17 is a partial enlarged view of the portion F of Figure 16 .

Figure 18 is a structural view showing a fifth embodiment of the rotary hook of the present invention.

Figure 19 is a structural view of a fifth embodiment of the rotary hook of the present invention from another perspective.

Figure 20 is a cross-sectional view of the fifth embodiment of the rotary hook of the present invention taken along the axis of the second through hole.

Figure 21 is a cross-sectional view of the fifth embodiment of the rotary hook of the present invention taken along the axis of the third through hole.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiments of the invention

The first embodiment of the hook:

1 and 2, FIG. 1 and FIG. 2 are structural views of the hook 2 at different viewing angles, and the hook 2 includes an outer shuttle frame 3, an inner shuttle frame 4, and a pressing piece 5. Referring to Figure 3 in conjunction with Figures 1 and 2, Figure 3 is an exploded view of the structure of the hook 2. The shape of the inner shuttle frame 4 is a bottomed cylindrical inner shuttle frame, and a cylindrical portion is formed in the middle portion of the inner shuttle frame 4, and the inner shuttle frame 4 is formed on the peripheral wall of the outer peripheral side thereof substantially circumferentially around the circumference. Along the 42, the inner shuttle frame 4 is formed with a stop portion 41 at its open end.

The pressing piece 50 includes a curved peripheral wall 53 and a buckle 51 on an axial end of the curved peripheral wall 53. The buckle 51 is disposed perpendicular to the peripheral wall 53, and is evenly distributed along the radial direction of the pressing piece 50 on the curved peripheral wall 53. Three positioning holes 52 are opened, and the pressing piece 5 is mounted and fixed on the outer wall of the outer shuttle frame 3 through the positioning hole 52 and rotates integrally with the outer shuttle frame 3.

Referring to Figure 4 in conjunction with Figures 2 and 3, Figure 4 is an exploded view of the outer shuttle frame 3, the outer shuttle frame 3 is provided in a bottomed cylindrical shape, and an inner shuttle frame receiving cavity is provided in the middle of the outer shuttle frame 3. 31. The inner wall of the inner bobbin accommodating chamber 31 has a groove portion 32 which is circumferentially wound. The groove portion 32 has a two-part composition, wherein a part of the groove portion is a circumferential groove formed by the inner wall of the outer shuttle frame 3, and the other portion is a circumferential groove formed by the combination of the step formed by the inner wall of the outer shuttle frame 3 and the buckle edge 51. A driving force receiving portion 34 is provided on a side of the outer shuttle frame with respect to the inner shuttle housing accommodating chamber 31. The driving force receiving portion 34 is for receiving an external rotational force and driving the outer shuttle frame 3 to rotate, specifically, the driving force receiving portion 34. A boss extending in the axial direction of the back side surface of the bottom 311 of the outer shuttle frame is provided with a positioning hole 35 extending in the middle of the driving force receiving portion 34 along the axis, along the side wall of the driving force receiving portion 34. A transmission hole 36 and a transmission hole 37 are opened through the through hole, and the transmission hole 36 and the transmission hole 37 are symmetrically disposed on both sides of the positioning hole 35. A shuttle shaft (not shown) is inserted into the positioning hole 35, and is engaged with the shuttle shaft through the screw through the transmission hole 36 and the transmission hole 37, and then the outer shuttle 3 can be received with the driving force of the shuttle shaft as a central axis of rotation. The portion 34 rotates integrally with the axis.

An oil reservoir 6 is formed inwardly on the bottom 311 of the outer shuttle frame 3. The oil reservoir 6 is located in the driving force receiving portion 34, and the oil reservoir chamber 6 is a sealed annular groove extending in an annular shape. The groove is disposed away from the axis of the driving force receiving portion 34, and a connecting groove 63 is formed in the radial direction on the circumferential end portion of the annularly disposed oil reservoir, and the oil reservoir chamber 6 and the connecting groove 63 have a direction toward the inner shuttle housing chamber 31. a continuous opening, a sealing member 61 is mounted on the continuous opening, and the sealing member 61, the oil reservoir 6 and the connecting groove 63 enclose a substantially closed space for storing lubricating oil, and the substantially sealed oil storage chamber 6 only serves as a lubricating oil The outlet of the output port, that is, the substantially closed oil reservoir 6 does not have an external input of lubricating oil into the reservoir.

Referring to Figure 5, Figure 5 is a cross-sectional view of the hook 2. The oil passage 62 will be described below with reference to Figs. 4 and 5. An oil passage 62 communicating with the connecting groove 63 is provided at an end of the connecting groove 63, and the oil passage 62 is located in the peripheral wall of the outer shuttle frame 3. Specifically, the oil passage 62 includes a tunnel assembly disposed through the outer wall of the outer shuttle frame. The tunnel assembly includes a first through hole that is radially opened and a second through hole that is axially opened. The first through hole and the second through hole are both Provided through the outer wall, and the opening of the first through hole on the outer wall is located on the radial surface, the opening of the second through hole on the outer wall is located on the axial surface, the first through hole and the second through hole are disposed in communication, and a sealing member 622 is disposed on the outer end of the through hole, and a sealing member 621 is disposed on the outer end of the second through hole, so that the oil passage 62 is a communicating hole which is bent at a right angle, and the oil storage chamber 6 The connecting groove 63, the second through hole and the first through hole are sequentially connected to each other, and the flow control device 7 is provided in the second through hole. The first end opening of the oil passage 62 is disposed on the connecting groove 63, and the second end opening of the oil passage 62 is disposed on the groove portion 32. Since the connecting groove 63 is disposed in communication with the oil reservoir 6, the oil passage 62 communicates with the groove. Between the portion 32 and the oil reservoir 6, the lubricating oil located in the oil reservoir 6 can be output to the groove portion 32 through the oil passage 62. The flow control device 7 includes a flow control plug 71, and the flow control plug 71 is fixedly mounted on the oil passage 62. In the second through hole, the first end of the flow control plug 71 abuts against the seal 621, and the second end of the flow control plug 71 abuts the shuttle portion 41 of the inner shuttle 4.

Since the inner shuttle frame 4 is disposed in the inner shuttle accommodating chamber 31 of the outer shuttle frame 3, and the edge portion 41 of the inner shuttle frame 4 is disposed in the groove portion 32, and is sandwiched along the portion 41 at a partial position of the outer shuttle frame 3 The buckle is between the 51 and the groove portion 32. Therefore, when the hook 2 is in operation, the inner shuttle frame 4 is fixed and does not rotate, and when the outer shuttle frame 3 and the pressing piece 5 rotate together, the lubricating oil placed in the oil storage chamber 6 is centrifugally driven. Under the action of the connection groove 63 into the oil passage 62, the force generated by the centrifugal force is applied to the lubricating oil located in the connecting groove 63, so that the lubricating oil has a positive pressure toward the outside, and finally the lubricating oil is under the action of the positive pressure. It is discharged from the groove portion 32 through the oil passage 62 to be attached to the surfaces of the buckle edge 51, the edge portion 41, and the groove portion 32, wherein the flow control plug has a diameter of 0.96 mm to 0.98 mm, which can be installed differently in the oil passage 62. The flow control pin 71 of the diameter is used to adjust the flow range of the lubricating oil at different speeds of the outer shuttle frame 3. When the outer shuttle frame rotates between 7000 and 7500 rpm, a flow control pin 71 with a diameter of 0.96 mm is installed. When the speed of the shuttle is 8000 rpm to 9000 rpm, the flow control plug with a diameter of 0.98 mm is installed. The pin 71, because the flow control plug 71 is installed, can effectively control the flow range of the lubricating oil in the oil passage 62, so that the lubricating oil does not cause the flow rate range of the lubricating oil to be discharged because the rotational speed of the outer shuttle frame 3 is too fast. The phenomenon of control, thus avoiding the pollution of the textile fabric by the lubricating oil.

Finally, it should be noted that the flow control plug of the embodiment is not limited to being installed in the second through hole, and may be installed in the first through hole. The flow control plug of the embodiment is not limited to a long strip, such as having A flaky flow control plug of a certain thickness is also within the scope of the present invention.

Second embodiment of the hook:

6 and 7, FIG. 6 is a cross-sectional view showing an operation state of a second embodiment of the hook of the present invention, and FIG. 7 is a partial enlarged view of FIG. 6. In the same principle of the first embodiment of the hook, the second embodiment of the hook differs in that the flow control device 7 comprises an adjustment member 8 which is rotatably or slidably mounted in the oil passage 62, the adjustment member The working portion 81 of the rotatably mounted portion 8 is rotatably mounted in the second through hole of the oil passage 62. The operating portion 82 of the adjusting member 8 is located at the outer wall of the outer side of the outer through hole of the outer shuttle frame 3, and the first through hole is located at the outer end. A sealing member 623 is disposed on the portion, and the adjusting member 8 is further provided with a flow chamber 81. The flow chamber 81 is L-shaped. The first end opening of the flow chamber 81 is disposed on the bottom surface of the working portion 81, and the second end opening of the flow chamber 81 is disposed. On the peripheral wall of the working portion 81. The first end opening of the flow chamber 81 is opposite to the output end of the connecting groove 63 to the oil passage 62. When it is necessary to control the flow rate output when the outer shuttle frame 3 rotates, the operating portion 82 is rotated to change the first end opening of the flow chamber 81. The overlap area with the connection groove 63 enters the output end of the oil passage 62, thereby achieving control of the flow rate of the lubricating oil in the oil passage 62.

8 and FIG. 9, FIG. 8 is a cross-sectional view showing a second embodiment of the hook of the present invention in a non-operating state, and FIG. 9 is a partially enlarged view of FIG. When the hook is transported, in order to prevent the lubricating oil in the hook from being bumped and easily leaked, the adjusting member 8 can be turned to the closed state, so that the peripheral wall of the working portion 81 enters the connecting groove 63 to the output of the oil passage 62. The end is closed to avoid oil leakage from the outer shuttle frame 3.

Finally, it should be noted that the adjusting member of the embodiment is not limited to the rotation adjustment, such as pulling the operating portion of the adjusting member, so that the adjusting member slides in the oil passage, thereby adjusting the opening of the first end and the connecting groove to enter the oil passage. The overlapping area of the output end, the regulation manner of controlling the flow rate of the lubricating oil in the oil passage, and the like are all within the protection scope of the present invention.

The third embodiment of the hook:

10 and FIG. 11, FIG. 10 is a cross-sectional view showing a third embodiment of the rotary hook of the present invention in a non-operating state, and FIG. 11 is a partial enlarged view of FIG. In the same principle of the first embodiment of the hook, the third embodiment of the hook differs in that the flow control device 7 includes a push rod 9, an elastic member 91 and a seal ring 624, and the seal ring 624 is fixedly mounted on the second pass. The hole is located at the outer end, the ejector rod 9 is slidably sleeved on the sealing ring 624 and the head of the ejector rod 9 is located in the oil passage 62. The shape of the head of the ejector rod 9 is conical, top The conical tip of the push rod 9 is opposite to the output end of the connecting groove 63 to the oil passage 62. The conical bottom surface of the push rod 9 is opposite to the outer wall of the outer shuttle frame 3. The first end of the elastic member 91 and the conical bottom surface of the push rod 9 Abutting, the second end of the elastic member 91 abuts against the sealing ring 624, and the sealing portion 625 is disposed on the outer end of the first through hole.

Referring to Figures 12 and 13, Figure 12 is a cross-sectional view showing the working state of the third embodiment of the hook of the present invention, and Figure 13 is a partial enlarged view of Figure 12. The centrifugal force generated when the outer shuttle frame 3 rotates causes the ejector pin 9 to perform a translational movement with respect to the axial direction of the sealing ring 624, while the conical bottom surface of the ejector pin 9 pushes the elastic member 91 to compress, and when the outer shuttle frame 3 rotates, the rotation speed increases. When the time is large, the degree of compression of the elastic member 91 is increased, and at the same time, the output of the lubricating oil in the oil passage 62 is increased. When the rotation speed of the outer shuttle frame 3 is decreased, the degree of compression of the elastic member 91 is reduced, and the reaction force at the elastic member 91 is reduced. Pushing the push rod 9 in the opposite direction to perform the translational movement, while reducing the output of the lubricating oil in the oil passage 62, thereby realizing the control of the flow rate in the oil passage, and simultaneously controlling the same by selecting elastic members with different elastic coefficients. When the outer shuttle frame 3 stops rotating, the jacking rod 9 closes the output end of the connecting groove 63 into the oil passage 62 under the force of the elastic member 91, so as to prevent the sewing machine from being stopped when the sewing machine is stopped. The outer shuttle frame 3 has oil leakage.

The fourth embodiment of the hook:

14 and FIG. 15, FIG. 14 is a cross-sectional view showing a non-operating state of a fourth embodiment of the hook of the present invention, and FIG. 15 is a partially enlarged view of FIG. In the same principle of the first embodiment of the hook, the fourth embodiment of the hook differs in that the flow control device 7 includes a push block 12, a screw push rod 13, a seal ring 627 and an elastic member 11, and the seal ring 627 is fixedly mounted. On the outer end of the second through hole, the auger 13 is rotatably connected to the sealing ring 627, the first end of the push rod 13 is rotatably connected to the push block 12, and the push block 12 is slidably mounted on the connection The slot 63 enters the output end of the oil passage 62. The push block 12 has a cylindrical shape and a cavity is disposed inside the push block 12. The first end of the push rod 13 is located in the cavity of the push block 12, and the elastic member 11 The first end of the elastic member 11 abuts against the sealing ring 627.

Referring to Figures 16 and 17, Figure 16 is a cross-sectional view showing the working state of the fourth embodiment of the hook of the present invention, and Figure 17 is a partially enlarged view of Figure 16.

When the push rod 13 is rotated, the first end of the push rod 13 drives the push block 12 to perform a translational movement in the axial direction of the seal ring 627, and when the push rod 13 is rotated to the direction in which the lubricating oil enters the oil passage 62 from the connecting groove 63. When rotating, the push block 11 will exit the oil passage 62 at the outlet end of the connecting groove 63, and at the same time compress the elastic member 11, and when the outer shuttle frame 3 rotates, the lubricating oil can be discharged from the groove portion 32 through the oil passage 62 to be attached thereto. On the surface of the buckle 51, the edge portion 41 and the groove portion 32, when the push rod 13 is continuously rotated, the flow of the lubricating oil in the oil passage 62 can be continuously increased. When the push rod 13 is moved in the opposite direction, the push block 11 will be pushed. The reverse translational movement of the elastic member 11 is reversed to reduce the flow rate of the lubricating oil in the oil passage 62. When the sewing machine stops working, the adjustable push rod 13 can be connected to the output end of the connecting passage 63 to the oil passage 62. Closed, Avoid oil leakage from the outer shuttle frame 3 when the sewing machine is stopped.

The fifth embodiment of the hook:

On the same principle and basis of the above-described hook embodiment, the fifth embodiment of the hook is further improved on the tunnel assembly and the oil reservoir. Specifically, referring to Figs. 18 and 19, Figs. 18 and 19 are hooks. The structural diagram of the fifth embodiment, the driving force receiving portion 103 of the fifth embodiment of the rotary hook has a larger diameter than the driving force receiving portion of the above-described hook embodiment, so that the oil reservoir 103 has a larger capacity, and then The fifth embodiment of the hook makes it unnecessary to provide a connecting groove, and the oil reservoir 103 can directly communicate with the oil passage 102.

The oil passage 102 includes a tunnel assembly disposed through an outer wall of the outer shuttle frame. The tunnel assembly includes a first through hole 1021, a second through hole 1022, and a third through hole 1023, and the first through hole 1021, the second through hole 1022, and the first through hole The three through holes 1023 are respectively disposed through the outer wall, the first through holes 1021 extend obliquely to the radial direction, the second through holes 1022 are axially disposed, the third through holes 1023 are radially disposed, and the first through holes The opening of the outer wall is located on the radial surface, and the opening of the second through hole 1022 is located on the axial surface of the outer wall and on the surface opposite to the groove portion, and the third through hole 1023 is located on the radial surface, that is, at the driving force. The end surface 1011 of the receiving portion 103 is placed. And the third through hole 1023 is disposed to communicate with the first through hole 1021, the third through hole 1023 is disposed above the axial direction of the second through hole 1022, and the third through hole 1023 is disposed in a threaded hole.

The fifth embodiment of the hook further includes a screw 1024 threadedly engaged with the third through hole 1023. The threaded portion of the screw 1024 is located at the position of the oil passage 102 and is provided with a flow groove 1025. The flow groove is disposed along the radial direction of the screw. The outer wall of the frame is provided with a scale, and the screw 1024 is rotated at different angles, so that the size of the space between the first through hole 1021 and the screw 1024 is adjusted, thereby accurately controlling the flow rate of the oil passage.

The flow control device of the above embodiment may be disposed in the third through hole 1023 for operation, and the flow rate of the first through hole 1021 of the oil passage 102 is controlled by the flow control device.

It can be seen from the above that the flow control device is arranged on the rotary hook, and by adjusting the flow control device, the flow rate in the oil passage can be controlled, and at the same time, the maximum flow rate can be controlled, thereby accurately controlling the flow rate of the lubricating oil and preventing the external flow. The problem of contamination of textile fabrics caused by excessive rotation speed when the shuttle frame rotates.

Finally, it should be noted that it is also within the scope of the present invention to integrally manufacture the push block and the push rod in this embodiment.

Industrial applicability

The outer shuttle frame and the rotary hook of the invention are suitable for the sewing airport in the garment manufacturing field, and the product of the invention is applied, and the flow rate in the oil passage is conveniently controlled through a plurality of simple structure flow control devices to achieve precise Control the flow of lubricant to avoid excessive lubricant contamination of clothing or too little lubricant affecting the normal use of the outer shuttle.

Claims

The outer shuttle frame includes a driving force receiving portion that receives a rotational driving force and an inner shuttle accommodating cavity, and a peripheral wall of the inner shuttle accommodating cavity is provided with a groove portion for slidingly engaging with the inner shuttle frame, and the driving force receiving portion is provided a substantially sealed oil storage chamber, the oil storage chamber being in communication with the groove portion through an oil passage;

It is characterized by:

The hook further includes a flow control device mounted on the outer shuttle, the flow control device for controlling the flow of the oil passage.
The hook according to claim 1, wherein:

The oil passage includes a tunnel assembly disposed through an outer wall of the outer shuttle frame, the flow control device being disposed through the bore assembly.
The hook according to claim 2, wherein:

The tunnel assembly includes a first through hole and a second through hole disposed in the peripheral wall, and the second through hole communicates between the first through hole and the oil reservoir.
The hook according to claim 3, characterized in that:

The tunnel assembly further includes a third through hole in communication with the first through hole.
A hook according to any one of claims 1 to 4, characterized in that:

The flow control device includes a screw, and the screw is provided with a flow groove at a position at the oil passage.
A hook according to any one of claims 1 to 3, characterized in that:

The flow control device includes a flow control plug that is mounted in the oil passage.
A hook according to any one of claims 1 to 4, characterized in that:

The flow control device includes an adjustment member that is rotatably or slidably mounted on the oil passage, and the adjustment member is provided with a flow passage that communicates with the oil passage.
A hook according to any one of claims 1 to 4, characterized in that:

The flow control device includes a pushing rod, a first elastic member and a first sealing ring, the pushing rod is slidably installed in the oil passage, and the first sealing ring is fixedly mounted on the outer shuttle frame The ejector rod slidably passes through the first sealing ring, the first end of the first elastic member abuts the head of the ejector rod, and the first elastic member The two ends abut against the first sealing ring, and the head of the ejector rod abuts the peripheral wall of the oil passage.
A hook according to any one of claims 1 to 4, characterized in that:

The flow control device includes a push rod, a second sealing ring fixedly mounted on an outer wall of the outer shuttle frame, the push rod rotatably passing through the second sealing ring, The head of the push rod is adjacent to the peripheral wall of the oil passage.
a rotary hook comprising an outer shuttle frame, an inner shuttle frame and a pressing piece, the inner shuttle frame being mounted in the inner shuttle frame receiving cavity, the inner shuttle frame being disposed on the groove portion and along the groove portion Rotating independently of the outer shuttle frame, the pressing piece includes a peripheral wall and a buckle edge at an axial end of the peripheral wall, the pressing piece is mounted on an outer wall of the outer shuttle frame, the buckle edge and the inner shuttle Frame fit,

It is characterized by:

The outer shuttle is the outer shuttle of any of the preceding claims 1-9.