Air suction device of sewing machine

Abstract

The utility model belongs to the technical field of sewing machines, and particularly relates to an air suction device of a sewing machine. A first air inlet, a second air inlet and an air outlet which are communicated with an inner cavity of the box body are formed in the air suction box, a driving part mounting seat is arranged at the second air inlet, a plurality of ventilation holes communicated with the outside and the second air inlet are formed in the driving part mounting seat, and the driving part is mounted on the driving part mounting seat and comprises a telescopic part; one end of the telescopic part extends into an inner cavity of the box body, an air suction blanking cap is arranged at one end of the telescopic part and driven by a driving part to act, when the driving part drives the telescopic part to extend out to drive the air suction blanking cap to seal the first air inlet, air enters the second air inlet, and when the driving part drives the telescopic part to retract to drive the air suction blanking cap to seal the second air inlet, air enters the second air inlet. Air enters the first air inlet; according to the utility model, the fan can be protected from frequent start and stop, and the service life of the fan is prolonged.

Description

Technical Field:

[0001] The utility model belongs to the technical field of sewing machines, and particularly relates to an air suction device of a sewing machine. Background Art:

[0002] A template sewing machine refers to a sewing machine that combines technologies such as garment template CAD software and garment templates for fully automatic application template production, improving production efficiency and product quality, and reducing the technical requirements for technical workers.

[0003] The Chinese utility model patent (authorization announcement number CN 205501604U, application date March 30, 2016, announcement date August 24, 2016) discloses a template sewing machine, which includes a sewing device and a machine base for supporting the sewing device. The machine base is provided with an operating table and a template. The template includes a lining board and a clamping board for clamping the fabric. The lining board is hollow, and a plurality of air extraction ports are opened on one side of the lining board for lining the fabric, and the lining board is communicated with an air suction device. The air suction device includes an air suction fan and an air suction pipe. One end of the air suction pipe is connected to the air suction fan, and the other end is communicated with the inside of the lining board. The air suction fan sucks air through the air suction pipe to achieve the effect of sucking air inside the lining board. The air suction device further includes a ventilation valve connected to the air suction pipe, and the ventilation valve controls the air flow in the air suction pipe to achieve the purpose of facilitating the control of the air suction force.

[0004] When the above-mentioned template sewing machine continuously sucks air, it can adsorb and position the lining board and the fabric on the lining board. When the sewing is completed, the air suction device needs to be turned off. The air suction device is restarted when sewing next time. The frequent start and stop of the air suction device results in a short service life. Summary of the Invention:

[0005] The purpose of the utility model is to provide an air suction device for a sewing machine in which the fan does not need to be frequently started and stopped, and the service life of the fan is extended.

[0006] The utility model is realized as follows:

[0007] An air suction device of a sewing machine includes an air suction box and a driving member. The air suction box is provided with a first air inlet, a second air inlet and an air outlet communicated with the inner cavity of the box. A driving member mounting seat is arranged at the second air inlet. The driving member mounting seat is provided with a plurality of ventilation holes communicating the outside with the second air inlet. The driving member is mounted on the driving member mounting seat. The driving member includes a telescopic part. One end of the telescopic part extends into the inner cavity of the box. An air suction plug cover is arranged at one end of the telescopic part. The air suction plug cover is driven by the driving member to act. When the driving member drives the telescopic part to extend and drives the air suction plug cover to seal the first air inlet, the second air inlet intakes air. When the driving member drives the telescopic part to retract and drives the air suction plug cover to seal the second air inlet, the first air inlet intakes air.

[0008] In the above suction device of a sewing machine, an installation hole is provided on the suction air plug cover, and one end of the telescopic part passes through the installation hole, and the suction air plug cover is fixedly connected to the telescopic part through a suction air plug cover fixing nut.

[0009] In the above suction device of a sewing machine, suction air plug cover rubber pads are respectively arranged on both end faces of the suction air plug cover.

[0010] In the above suction device of a sewing machine, the driving part mounting seat includes a cylinder body located at the second air inlet, an end cover is arranged at the outer end of the cylinder body, a driving part through hole is arranged on the end cover, a threaded part is arranged on the driving part, one end of the driving part passes through the driving part through hole and is locked and fixed on the end cover through a driving part fixing nut, and the ventilation holes are distributed on the cylinder body.

[0011] In the above suction device of a sewing machine, the suction box includes a box body and a box cover, an open end is provided on the box body, and the box cover is detachably arranged on the open end.

[0012] In the above suction device of a sewing machine, a filter screen is arranged on the air outlet.

[0013] In the above suction device of a sewing machine, a slot is provided on the box body, and the filter screen is inserted into the slot and covers above the air outlet.

[0014] The prominent advantages of the present utility model compared with the prior art are:

[0015] 1. The present utility model can not only solve problems such as difficult shaping and difficult feeding of fabrics when a template sewing machine sews fabrics, but also protect the fan from frequent start and stop, and prolong the service life of the fan;

[0016] 2. The present utility model controls the opening and closing of the first air inlet and the second air inlet respectively through a driving part, and the driving part 2 is located outside the suction box, with a compact structure, convenient for overhaul and maintenance, and the driving part will not be affected by impurities such as cloth scraps and thread ends and affect the service life. Brief description of the drawings:

[0017] Figure 1 is an exploded schematic diagram of the present utility model;

[0018] Figure 2 is a schematic diagram of the first air inlet of the present utility model being opened and the second air inlet being closed (the arrow in the figure is the air volume path);

[0019] Figure 3 is a schematic diagram of the first air inlet of the present utility model being closed and the second air inlet being opened (the arrow in the figure is the air volume path).

[0020] In the figure: 1. Air suction box; 2. Driving part; 3. Telescopic part; 4. Inner cavity of the box; 5. First air inlet; 6. Air outlet; 7. Mounting seat for the driving part; 8. Ventilation hole; 9. Air suction plug; 10. Filter screen; 11. Mounting hole; 12. Fixing nut for the air suction plug; 13. Rubber pad for the air suction plug; 14. Cylinder body; 15. End cover; 16. Perforation for the driving part; 17. Fixing nut for the driving part; 18. Box body; 19. Box cover; 20. Slot. Specific embodiments:

[0021] The following further describes the present utility model with specific embodiments. Refer to Figure 1 —3:

[0022] The present utility model provides an air suction device for a sewing machine. The air suction device of the sewing machine includes an air suction box 1 and a driving part 2. The driving part 2 includes a telescopic part 3. In this embodiment, the driving part 2 is a cylinder, and the telescopic part 3 is the piston rod of the cylinder. The air suction box 1 is provided with a first air inlet 5, a second air inlet and an air outlet 6 that communicate with the inner cavity 4 of the box. A mounting seat 7 for the driving part is provided at the second air inlet. The mounting seat 7 for the driving part is provided with a ventilation hole 8 that communicates with the outside and the second air inlet. The driving part 2 is mounted on the mounting seat 7 for the driving part. One end of the telescopic part 3 extends into the inner cavity 4 of the box. An air suction plug 9 is provided at one end of the telescopic part 3. The air suction plug 9 is driven by the driving part 2 to act. When the driving part 2 drives the telescopic part 3 to extend and drives the air suction plug 9 to seal the first air inlet 5, the second air inlet intakes air. When the driving part 2 drives the telescopic part 3 to retract and drives the air suction plug 9 to seal the second air inlet, the first air inlet 5 intakes air.

[0023] During use, the first air inlet 5 is used to adsorb the fabric, and the second air inlet is connected to the outside air. The air outlet 6 is connected to a blower.

[0024] On the one hand, the present utility model solves the problems such as difficult shaping and difficult feeding of the fabric when a template sewing machine sews the fabric. On the other hand, it protects the blower from frequent start and stop, and prolongs the service life of the blower.

[0025] In addition, as can be seen from the above, the present utility model controls the opening and closing of the first air inlet 5 and the second air inlet respectively through a driving part 2, and the driving part 2 is located outside the air suction box 1. The structure is compact, convenient for maintenance and repair, and the driving part 2 will not affect the service life due to the attachment of impurities such as cloth scraps and thread ends.

[0026] Furthermore, in order to block impurities such as cloth scraps and thread ends from the first air inlet 5 and the second air inlet, the present utility model is provided with a filter screen 10 at the air outlet 6. The filter screen 10 is made of a metal non-flammable material, and the surface presents a mesh shape or a shape of dense round holes.

[0027] It should be noted that the specific connection structure between the air suction plug cover 9 and the telescopic part 3 of the present utility model is as follows: An installation hole 11 is provided on the air suction plug cover 9, a necking part is provided on the telescopic part 3, and an external thread is provided on the necking part. The necking part and the rest of the telescopic part 3 form a first step surface. One end of the telescopic part 3 passes through the installation hole 11, and the air suction plug cover 9 and the telescopic part 3 are fixedly connected by an air suction plug cover fixing nut 12, and the air suction plug cover 9 is axially limited between the fixing nut 12 and the first step surface.

[0028] To improve the sealing effect, air suction plug cover rubber pads 13 are respectively provided on both end faces of the air suction plug cover 9 of the present utility model. One end of the telescopic part 3 is inserted through the air suction plug cover rubber pad 13, and the air suction plug cover rubber pad 13 is also axially limited by the air suction plug cover fixing nut 12 and the first step surface.

[0029] In addition, the driving part mounting seat 7 of the present utility model includes a cylinder body 14 located at the second air inlet. An end cover 15 is provided at the outer end of the cylinder body 15, a driving part through hole 16 is provided on the end cover 15, a threaded part is provided on the driving part 2, and the threaded part and the rest of the driving part 2 form a second step surface. One end of the driving part 2 passes through the driving part through hole 16 and is locked and fixed on the end cover 15 by a driving part fixing nut 17, and the ventilation holes 8 are distributed on the cylinder body 14.

[0030] In addition, the air suction box 1 of the present utility model includes a box body 18 and a box cover 19. An open end is provided on the box body 18, and the box cover 19 is detachably provided on the open end, usually detachably connected by screws.

[0031] The present utility model provides a slot 20 on the box body 18, and the filter net 10 is inserted into the slot 20 and covers above the air outlet 6.

[0032] It should be noted that the slot 20 of the present utility model is provided at one end of the inner wall of the box body 18 close to the open end. An insertion piece with a length adapted to the slot 20 is provided on the filter net 10, and the insertion piece of the filter net 10 is inserted into the slot 20 on the inner wall of the box body 18. Such a structure can reduce the length of the slot 20, facilitate the disassembly and assembly of the filter net 10, and at the same time can position the filter net 10 in the up and down directions.

[0033] The working principle of the present utility model is as follows:

[0034] See Figure 2 , when it is necessary to adsorb the fabric, the first air inlet 5 is connected to the fabric adsorption working place and is in an open state, and the second air inlet is connected to the external air and is in a closed state at this time, blocked by the air suction plug cover 9. The air volume enters the closed inner cavity 4 of the box through the first air inlet 5, and then is sucked away by the air outlet 6 connected to the fan after passing through the filter net 10.

[0035] See Figure 3 , when there is no need to adsorb the fabric, the first air inlet 5 is in a closed state when connected to the fabric adsorption working place and is blocked by the air suction plug 9. The second air inlet is connected to the external air and is in an open state at this time. The air volume enters the inner cavity 4 of the closed box through the second air inlet and is then sucked away by the air outlet connected to the fan through the filter screen 10.

[0036] The above embodiments are only one of the preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, all equivalent changes made according to the shape, structure, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A suction device for a sewing machine, characterized in that: The invention comprises an air suction box (1) and a driving member (2), wherein the air suction box (1) is provided with a first air inlet (5), a second air inlet and an air outlet (6) which are connected to an inner cavity (4) of a box body (18), a driving member mounting seat (7) is provided at the second air inlet, and a plurality of ventilation holes (8) which are connected to the outside and the second air inlet are provided on the driving member mounting seat (7), and the driving member (2) comprises a telescopic portion (3), wherein the driving member (2) is provided with a plurality of ventilation holes (8) which are connected to the outside and the second air inlet. One end of the telescopic part (3) extends into the inner cavity (4) of the box body (18), and an air suction blocking cover (9) is arranged at one end of the telescopic part (3). The air suction blocking cover (9) is driven by a driving member (2). When the driving member (2) drives the telescopic part (3) to extend and drives the air suction blocking cover (9) to seal the first air inlet (5), air enters the second air inlet. When the driving member (2) drives the telescopic part (3) to retract and drives the air suction blocking cover (9) to seal the second air inlet, air enters the first air inlet (5).

2. The air suction device for a sewing machine according to claim 1, characterized in that: The air suction blocking cover (9) is provided with a mounting hole (11), one end of the telescopic part (3) passes through the mounting hole (11) and the air suction blocking cover (9) is fixedly connected to the telescopic part (3) via an air suction blocking cover fixing nut (12).

3. The air suction device of a sewing machine according to claim 2, characterized in that: Air suction blocking cover rubber pads (13) are respectively arranged on both end surfaces of the air suction blocking cover (9).

4. The air suction device for a sewing machine according to claim 1, characterized in that: The driving member mounting seat (7) comprises a cylinder (14) located at the second air inlet, an end cover (15) is arranged at the outer end of the cylinder (14), a driving member through hole (16) is arranged on the end cover (15), a threaded portion is arranged on the driving member (2), one end of the driving member (2) passes through the driving member through hole (16) and is locked and fixed on the end cover (15) by a driving member fixing nut (17), and the ventilation holes (8) are distributed on the cylinder (14).

5. The air suction device of a sewing machine according to any one of claims 1 to 4, characterized in that: The air suction box (1) comprises a box body (18) and a box cover (19); the box body (18) is provided with an open end, and the box cover (19) is detachably arranged on the open end.

6. The air suction device for a sewing machine according to claim 5, characterized in that: A filter screen (10) is provided on the air outlet (6).

7. The air suction device of a sewing machine according to claim 6, characterized in that: The box body (18) is provided with a slot (20), and the filter screen (10) is plugged into the slot (20) and covers the top of the air outlet (6).

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