CN214694614U

CN214694614U - Cutting device of sewing machine

Info

Publication number: CN214694614U
Application number: CN202120109079.7U
Authority: CN
Inventors: 陈世芳
Original assignee: Ching Chi Machine Co Ltd
Current assignee: Ching Chi Machine Co Ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-11-12
Anticipated expiration: 2031-01-15

Abstract

A cutting device of a sewing machine, comprising: a body provided with a guide hole, and the bottom end of the guide hole is provided with a through hole; an actuating component fixed on a fixed object and used for linking the body; a tool apron, which is inserted into the guide cavity by a guide shaft in a matching way, and a containing cavity is concavely arranged at the tail end of the guide shaft, and a shaft hole is penetrated through the bottom end of the containing cavity; a spring, which is arranged between the containing cavity and the bottom end of the guide cavity; an adjusting rod, the rear end of which forms a screw rod section, penetrates through the shaft hole, penetrates through the through hole and penetrates out, and is screwed with at least one adjusting nut; and a blade locked at the front end of the tool apron, if the body is actuated by the actuating component, the blade is linked to cut off the workpiece below.

Description

Cutting device of sewing machine

Technical Field

The utility model relates to a cutting device of a sewing machine.

Background

The cutting device applied to the sewing machine at present, for example, taiwan patent application No. 104118245, "fine tuning and touch self-adjusting punching structure of sewing machine for parallel sewing", the sewing machine for parallel sewing at least has a sewing platform for bearing two pieces of cloth to sew, a fixed connection seat extending and correspondingly arranged above the sewing platform and an automatic cutting device fixedly arranged on the fixed connection seat; the automatic cutting device comprises an electric driver with an action rod at the lower part and a fine-tuning and touch self-adjusting punching structure which is fixedly connected with the tail end of the action rod and driven by the action rod. The method is characterized in that: the die-cut structure is provided with an adjusting base body, the adjusting base body is provided with a displacement guide groove, a tool apron which can move through the limit of the displacement guide groove, a manual adjusting connecting rod which is connected with the tool apron and can adjust the tool apron to a proper position relative to the adjusting base body, and an elastic jacking piece which can return after the tool apron moves.

In the above structure, the elastic ejecting member is sleeved on the periphery of the manual adjusting link and exposed at the rear end of the tool post, so as to reduce the length of the tool post extending into the displacement guide slot, and a large gap exists between the elastic ejecting member and the adjusting seat body, so that the tool post still shakes, which is not favorable for cutting off operation.

In addition, in the prior art of the patent, since there is usually a gap between the guide rail and the guide block of the actuating rod, since the guide rail for guiding the actuating rod is very close to the actuating rod, the gap will provide a large angular displacement of the actuating rod, so that the punching blade cannot punch accurately, and there is a need for improvement.

In view of the above, the inventor of the present invention has made a research and innovation to finally disclose a cutting device of a sewing machine of the present invention.

SUMMERY OF THE UTILITY MODEL

The main technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art, and to provide a cutting device for a sewing machine, wherein the guide shaft of the knife holder can be longitudinally inserted into the guide hole of the body, and the knife holder is not easy to shake under the action of high-speed sewing, so as to ensure the smooth completion of the cutting operation; the adjusting mechanism is positioned at the open space at the outer side of the sewing machine, so that an operator is not hindered by other mechanisms of the sewing machine during adjustment, and the adjustment operation is more convenient; the angular displacement caused by the clearance is reduced, so that the cutter holder cannot deviate along with the clearance when the cutting is carried out, and the cutting operation is favorably and smoothly carried out; the axis of the guide shaft is aligned to the cutting-off acting force, so that the bending moment is generated on the blade when the cutting-off is avoided, and the utility model discloses the cutting-off operation is more smooth.

The utility model provides a technical scheme that its technical problem adopted is:

a cutting device of a sewing machine, comprising: a body, the front end of which is concavely provided with a guide hole, and the bottom end of the guide hole is axially provided with a through hole; the actuating component is fixed on a fixed object and comprises an actuating rod which is connected to the body so as to link the body; a tool apron, axially equipped with a guide shaft, making the guide shaft be inserted into the guide cavity in a matching way so as to guide the tool apron to axially move along the guide cavity, and the tail end of the guide shaft is axially equipped with a containing cavity in a concave way, and the bottom end of the containing cavity is passed through a shaft hole; a spring, which is arranged between the containing cavity of the tool apron and the bottom end of the guide cavity of the body and elastically pushes the tool apron outwards at ordinary times; the rear end of the adjusting rod penetrates into the shaft hole at the front end of the tool apron, penetrates out of the through hole of the body and is screwed with at least one adjusting nut; and a blade locked at the front end of the tool apron, if the body is actuated by the actuating component, the blade is linked to cut off the workpiece below.

The utility model discloses a cutting device of sewing machine, wherein should actuate the subassembly and can actuate the subassembly for pneumatics/subassembly or solenoid valve that surges, the utility model discloses not self-limiting.

The utility model discloses a cutting device of sewing machine, wherein should make between a guide arm of pole and this body, with a universal coupling interconnect.

The utility model discloses a cutting device of sewing machine, wherein make the bottom of acting the pole at ordinary times to support and press on a guide arm of this body, and make between this guide arm and a fixed part, put a reset spring.

The utility model discloses a cutting device of sewing machine, wherein lock on this guide arm and establish a guide member, make this guide member's free end wear to locate one and be located long-range guide slot.

The cutting device of the sewing machine disclosed in the utility model, wherein the guide slot is composed of two guide plate bodies locked on the fixed wall.

The utility model discloses a cutting device of sewing machine, wherein the guide cave bottom of this body inlays and puts a jam to run through this through-hole in this jam, make this adjusting lever be located and wear out this through-hole after the spiral shell closes this adjusting nut.

The utility model discloses a cutting device of sewing machine, wherein the center of this blade is the axle center of aligning this guide axle.

The utility model discloses a cutting device of sewing machine has following characteristic and advantage:

1. the spring is arranged in the guide shaft of the tool apron, so the guide shaft of the tool apron can be longitudinally penetrated in the guide hole of the body, and the gap between the guide shaft and the guide hole is extremely small and longitudinally moves, so the tool apron is not easy to shake under the action of high-speed sewing, and the smooth completion of the cutting-off operation is ensured.

2. The adjusting nut for adjusting the tool apron is arranged at the rear end of the body, namely, is positioned at the outer side open space of the sewing machine, so that an operator cannot be hindered by other mechanisms of the sewing machine during adjustment, and the adjustment operation is more convenient.

3. The free end of the guide member locked on the guide rod penetrates into a remote guide groove to slide, and the distance between the guide groove and the guide rod is increased, so that the angular displacement caused by the gap can be reduced, the cutter holder cannot deviate along with the cutting, and the cutting operation can be smoothly carried out.

4. The utility model discloses the central authorities of blade are the axle center of adjusting this guide axle well, and the effort that consequently cuts off also can adjust well the axle center of this guide axle, produces bending moment when can avoiding cutting off on the blade, makes the utility model discloses the operation of cutting off is more smooth.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is an exploded perspective view of the present invention.

Fig. 2 is an assembled perspective view of fig. 1.

Fig. 3 is a perspective view showing the present invention mounted on a sewing machine.

Fig. 4 is a partial perspective view of a shield removed from fig. 3.

Fig. 5 is a schematic cross-sectional view taken along the direction 5-5 in fig. 4.

Fig. 6 is a rear perspective view of fig. 2.

Fig. 7 is an exploded perspective view of another embodiment of the present invention.

FIG. 8 is a schematic view of the embodiment of FIG. 7 mounted to a sewing machine.

The reference numbers in the figures illustrate:

10 main body 11 guide hole 12 through hole

13 guide rod 14 guide member 141 free end

15 guide plate 2020 'actuating element 2121' actuating rod

22 universal joint 221 first coupling member 222 second coupling member

223 pivot 224 set screw 23 return spring

30 seat 31 guide shaft 32 receiving cavity

33 shaft hole 34 positioning cavity 40 spring

50 the adjusting rod 51 has a screw section 52 blocked

53 adjusting nut 60 blade 70 anvil

80 positioning plate 81 positioning part 101 fixing part

102 guide groove 103 fixed wall F fixture

Detailed Description

Referring to fig. 1 to 6, the present invention relates to a cutting device of a sewing machine, including: a body 10, a guide cavity 11 is concavely arranged at the front end of the body, and a through hole 12 is axially arranged at the bottom end of the guide cavity 11; an actuating component 20 fixed on a fixed object F, which can be a fixed frame fixed on the sewing machine body, the utility model is not limited by itself, the actuating component 20 comprises an actuating rod 21 connected on the body 10 to link the body 10 to move; a tool holder 30, axially protruding with a guiding shaft 31, making the guiding shaft 31 fittingly and lengthily placed in the guiding cavity 11 to guide the tool holder 30 to axially move along the guiding cavity 11, and axially recessed with an accommodating cavity 32 at the end of the guiding shaft 31, and a shaft hole 33 passing through the bottom end of the accommodating cavity 32; a spring 40 disposed between the accommodating cavity 32 of the tool holder 30 and the bottom end of the guiding cavity 11 of the body 10 for resiliently urging the tool holder 30 outward at ordinary times; an adjusting rod 50, the rear end of which forms a screw section 51, the rear end of the adjusting rod 50 penetrates through the shaft hole 33 at the front end of the tool holder 30 and penetrates out through the through hole 12 of the body 10, and then is screwed with at least one adjusting nut 52; and a blade 60 locked to the front end of the tool holder 30, such that the body 10 is actuated by the actuating element 20 to link the blade 60 to cut off the workpiece located therebelow.

The present invention discloses a cutting device of sewing machine, wherein the actuating component 20 can be an actuating component 20 such as a pneumatic/hydraulic cylinder shown in fig. 1, or an electromagnetic valve actuating component 20' shown in fig. 7-8.

As shown in fig. 1 and 2, the cutting device of the sewing machine of the present invention is disclosed, wherein a guide rod 13 is protruded from the main body 10, such that the actuating rod 21 and the guide rod 13 are connected to each other by a universal coupling 22, and the main body 10 is smoothly linked to move up and down by the connection of the universal coupling 22.

As shown in fig. 1 and 2, the universal joint 22 disclosed in the present invention includes: a first coupling member 221 is connected to or formed at the top end of the guide bar 13; a second connecting member 222 connected to the bottom end of the actuating rod 21 and pivotally connecting the first and second connecting

members

221, 222 with each other by a pivot 223. The pivot 223 is fastened to the first coupling member 221 by a set screw 224.

As shown in fig. 7 and 8, the cutting device of the sewing machine of the present invention further comprises a fixing portion 101, wherein the bottom end of the actuating rod 21 'is normally pressed against a guide rod 13 of the main body 10, and a return spring 23 is disposed between the guide rod 13 and the fixing portion 101, such that when the actuating rod 21' downwardly actuates the main body 10 and retracts, the main body 10 can be returned to the initial position by the return spring 23.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the cutting device of the sewing machine of the present invention further includes a guide member 14 locked on the guide bar 13, such that the free end 141 of the guide member 14 is inserted into a remotely located guide slot 102. When the main body 10 moves up and down, the guide rod 13 can move up and down stably according to the guide of the guide groove 102, so as to reduce the angular displacement generated when the main body 10 is actuated, and the blade 60 mounted on the main body 10 can accurately cut off the workpiece by crossing the anvil 70 below the blade.

As shown in fig. 4, the cutting device of the sewing machine of the present invention further comprises a fixing wall 103, wherein the guiding groove 102 is formed by two guiding plate bodies 15 locked on the fixing wall 103. The fixing wall 103 may be a sewing machine body or a frame locked to the sewing machine body, but the present invention is not limited thereto.

As shown in fig. 1 and 5, the cutting device of the sewing machine of the present invention has a block 52 embedded in the bottom end of the guiding cavity 11 of the body, and the block 52 penetrates the through hole 12, so that the adjusting rod 50 is threaded with the adjusting nut 53 after penetrating the through hole 12. The stopper 52 may be integrally formed with the body, but the present invention is not limited thereto.

The utility model discloses a cutting device of sewing machine, wherein the center of the blade 60 is aligned with the axis of the guiding shaft 31. Thus, when blade 60 cuts downward, blade 60 is subjected to a relatively uniform force, and vibration of blade 60 is reduced, thereby making the cutting operation smoother.

As shown in fig. 6, the cutting device of the sewing machine of the present invention further comprises a positioning plate 80 fixed on the body 10, and the positioning plate 80 is provided with a positioning portion 81 extending into a positioning cavity 34 of the knife holder 30 to block the rotation of the knife holder 30, so that the blade 60 attached to the knife holder 30 can not be left or right shaken when being cut.

1. because the spring 40 is disposed in the guiding shaft 31, the guiding shaft 31 of the tool holder 30 can be longitudinally extended into the guiding cavity 11 of the main body 10 to slide, and because the gap between the guiding shaft 31 and the guiding cavity 11 is extremely small and longitudinally moves, the tool holder 30 is not easily shaken under the high-speed sewing operation, so as to ensure the smooth completion of the cutting operation.

2. The adjusting nut 52 for adjusting the tool post 30 is located at the open rear end of the main body 10, so that the operator is not hindered by other mechanisms of the sewing machine during adjustment, thereby facilitating the adjustment operation.

3. The guide rod 13 slides through a guide slot 102 located at a remote position by the end of the guide member 14, and since the distance between the guide slot 102 and the guide rod 13 is lengthened, the angular displacement of the guide rod 13 caused by the gap between the guide slot 102 and the guide rod 13 can be reduced, so that the cutting operation can be more stable.

4. The utility model discloses a central authorities of blade 60 are the axle center of adjusting this guide shaft 31 well, and the effort that consequently cuts off also can adjust well the axle center of this guide shaft 31, produces too big bending moment on blade 60 when can avoiding cutting off, makes the utility model discloses the cutting off operation is more smooth.

The structure and shape of the present invention can be modified without departing from the spirit and scope of the present invention, which is not limited to the above embodiments.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims

1. A cutting device of a sewing machine, characterized by comprising:

a body, the front end of which is concavely provided with a guide hole, and the bottom end of the guide hole is axially provided with a through hole;

the actuating component is fixed on a fixed object and comprises an actuating rod which is connected with the body so as to link the body to move;

a tool apron, axially equipped with a guide shaft, making the guide shaft be matched and placed in the guide cavity so as to guide the tool apron to make axial displacement along the guide cavity, and on the tail end of said guide shaft a receiving cavity is axially recessed, and the bottom end of said receiving cavity is passed through a shaft hole;

a spring, which is arranged between the containing cavity of the tool apron and the bottom end of the guide cavity of the body and elastically pushes the tool apron outwards at ordinary times;

the rear end of the adjusting rod penetrates into the shaft hole at the front end of the tool apron, penetrates out of the through hole of the body and is screwed with at least one adjusting nut; and

a blade locked at the front end of the tool apron, and the body is actuated by the actuating component to link the blade to cut off the workpiece below.

2. The cutting device of a sewing machine of claim 1, wherein the body further has a guide bar protruded therefrom, and the actuating bar and the guide bar are coupled to each other by a universal coupling.

3. The cutting device of a sewing machine according to claim 2, wherein the universal joint includes: the first connecting component is connected with or formed at the top end of the guide rod; and a second connecting member connected to the bottom end of the actuating rod and pivotally connecting the first and second connecting members with each other by a pivot.

4. The cutting device of a sewing machine of claim 3, wherein the pivot is fastened to the first coupling member with a set screw.

5. The cutting device of a sewing machine according to claim 1, further comprising a fixing portion, and the body further has a guide rod protruded therefrom, so that the bottom end of the actuating rod is normally pressed against the guide rod, and a return spring is disposed between the guide rod and the fixing portion.

6. A cutting device according to claim 2 or 5, wherein the guide bar is further provided with a guide member having a free end thereof inserted into a remote guide slot.

7. The cutting device of a sewing machine of claim 6, further comprising a fixing wall, wherein the guide groove is formed by two guide plates locked to the fixing wall.

8. The cutting device of a sewing machine of claim 1, wherein a stopper is inserted into the bottom end of the guide cavity of the body and penetrates the through hole at the stopper.

9. The cutting device of a sewing machine according to claim 1, wherein the center of the blade is aligned with the axis of the guide shaft.

10. The cutting device of sewing machine of claim 1, further comprising a positioning plate fixed to the body, wherein the positioning plate is provided with a positioning portion extending into a positioning cavity of the knife holder.