Air suction switch assembly of air suction platen of sewing machine

Abstract

The utility model relates to an air suction switch assembly of an air suction bedplate of a sewing machine, which comprises a working table, the air suction bedplate is arranged on the working table, an air chamber is arranged at the bottom of the air suction bedplate, the air suction switch assembly is further arranged at the bottom or the side part of the air chamber, the air suction switch assembly comprises a cavity, and the air chamber is communicated with the cavity through an air suction opening. The cavity wall of the cavity is provided with an air inlet communicated with the outside, the cavity is further provided with an air inlet and outlet control valve, and the control valve is matched with the air suction opening or the air inlet to ensure that only one of the air suction opening and the air inlet is in an open state. The cavity is communicated with an air suction device through an air suction pipeline; the air suction switch assembly is directly arranged at the bottom or the side portion of the air chamber, only one control valve is adopted to control opening and closing of the air suction opening and the external air inlet of the air chamber at the same time, and the air suction device has the advantages of being compact in structure and saving space below the workbench.

Description

Technical Field

[0001] The utility model relates to sewing machine technology, in particular to an air suction switch component of an air suction table of a sewing machine. Background Art

[0002] In order to quickly fix or fold the fabric, an industrial template sewing machine usually sets a suction table on the workbench. The bottom of the suction table is an air chamber, which is connected to the suction device through a suction duct and a suction switching device. Considering that there is a lag process from the start of the suction device to the suction plate generating suction, the suction device is kept running at ordinary times, and the opening and closing of the suction table is controlled by switching the air valve of the suction switching device; the current suction switching device includes a cavity, which is divided into three chambers. The first chamber is connected to the air chamber, the second chamber is connected to the outside, and the third chamber is connected to the suction device through a suction duct. Air valves are arranged between the first chamber, the second chamber and the third chamber, and each air valve is controlled by an independent cylinder. When working, one of the two air valves is opened and the other is closed, ensuring that only one of the first chamber or the second chamber is connected to the third chamber; the existing structure suction switching device occupies the space under the workbench, which will affect the layout of other equipment, and the switching device adopts a double group of cylinders and air valves, which is not simple enough. Utility Model Content

[0003] The purpose of the utility model is to provide a suction switch assembly for a sewing machine suction table. The suction switch assembly is directly arranged at the bottom or side of an air chamber, and only one control valve is used to simultaneously control the opening and closing of the suction port and the external air inlet of the air chamber. The utility model has the characteristics of compact structure and saving space under the workbench.

[0004] To achieve the above purpose, the following technical solutions are adopted:

[0005] A suction switch assembly for a suction table of a sewing machine comprises a workbench, on which a suction table is arranged, and an air chamber is provided at the bottom of the suction table. The invention is characterized in that a suction switch assembly is also arranged at the bottom or side of the air chamber, and the suction switch assembly comprises a cavity, and the air chamber and the cavity are connected through a suction port, and an air inlet communicating with the outside is provided on the cavity wall of the cavity, and an air inlet and outlet control valve is also provided on the cavity, and the control valve cooperates with the suction port or the air inlet to ensure that only one of the suction port and the air inlet is in an open state; the cavity is connected to the suction device through a suction duct.

[0006] The air suction switch assembly is provided with a bottom of the air chamber, the air suction port is opened at the bottom of the air chamber, and the air inlet is provided with a bottom of the cavity and is located directly below the air suction port.

[0007] The control valve includes a cylinder, the cylinder body is fixed on the bottom surface of the cavity just below the air suction port, the air inlet is distributed on the periphery of the cylinder body, the piston rod of the cylinder passes upward through the cavity wall into the cavity, a valve plate is installed on the piston rod, and the piston rod extends and retracts up and down to drive the valve plate to close the air suction port or the air inlet.

[0008] The cavity is also provided with an air outlet interface, a filter cover is arranged at the air outlet interface, and the air outlet interface is connected to the air suction duct and communicated with the air suction device.

[0009] An air volume regulating device is also arranged on the side wall of the cavity, and the air volume regulating device comprises an regulating plate pivotally connected to the side wall of the cavity and a plurality of air inlet holes arranged around the pivotal part. The plurality of air inlet holes can be partially or completely closed by rotating the regulating plate.

[0010] The utility model directly connects the air suction switch component with the air chamber as one, and the switching of the air valve can be realized through only one set of control valves. Compared with the existing structure, it is more compact and does not occupy the space under the workbench. It has the characteristics of compact structure and saving space under the workbench. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the prior art;

[0012] Figure 2 It is a schematic diagram of the structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the internal structure of the air suction table of the utility model in the air suction state;

[0014] Figure 4 This is a schematic diagram of the internal structure of the utility model when the suction table is in a closed state. Implementation

[0015] like Figure 1-4 As shown, a suction switch assembly of a suction table of a sewing machine comprises a workbench 1, on which a suction table 2 is arranged, the bottom of the suction table 2 is provided with an air chamber 3, a suction switch assembly is also arranged at the bottom or side of the air chamber 3, the suction switch assembly comprises a cavity 4, the cavity 4 is provided with a bottom of the air chamber 3, a suction port 31 connected to the cavity 4 is opened at the bottom of the air chamber 3, an air inlet 41 connected to the outside is opened at the bottom of the cavity 4 and directly below the suction port 31, an air inlet 41 is opened on the cavity 4, an air inlet and outlet control valve is also arranged on the cavity 4, the control valve cooperates with the suction port 31 or the air inlet 41 to ensure that only one of the suction port 31 and the air inlet 41 is in an open state; an air volume regulating device 8 is also arranged on the side wall of the cavity 4, the air volume regulating device 8 comprises an adjusting plate pivotally connected to the side wall of the cavity and a plurality of air inlet holes opened around the pivotal part, and the plurality of air inlet holes can be partially or completely closed by rotating the adjusting plate.

[0016] The control valve includes a cylinder, a cylinder body 61 fixed on the bottom surface of the cavity 4 directly below the air suction port 31, and the air inlet 41 is distributed on the periphery of the cylinder body 61. The piston rod 62 of the cylinder passes upward through the cavity wall into the cavity 4, and a valve plate 63 is installed on the piston rod 62. The piston rod 62 extends and retracts up and down to drive the valve plate 63 to close the air suction port 31 or the air inlet 41.

[0017] The cavity 4 is also provided with an air outlet interface 42 , at which a filter cover 43 is arranged, and the air outlet interface 42 is connected to the air suction duct 7 and communicates with the air suction device 5 .

[0018] When the utility model is working, the suction port 31 and the air inlet 41 are switched by extending and retracting the piston rod 62 of the cylinder up and down. When the piston rod 62 descends, it drives the valve plate 63 to close the air inlet 41. At this time, the cavity 4 and the air chamber 3 are connected to the suction table 2 to suck air; when the piston rod 62 descends, it drives the valve plate 63 to close the suction port 41. At this time, the cavity 4 and the air chamber 3 are isolated, and the suction table stops sucking air.

[0019] The utility model directly connects the air suction switch assembly with the air chamber as one, and switches the air valves of the air suction port 31 and the air inlet 41 simultaneously through one cylinder. Compared with the existing structure, it is more compact and does not occupy the space under the workbench. It has the characteristics of compact structure and saving space under the workbench.

Claims

1. A suction switch assembly for a suction table of a sewing machine, comprising a workbench (1), a suction table (2) being arranged on the workbench (1), and an air chamber (3) being provided at the bottom of the suction table (2), characterized in that: An air suction switch assembly is also provided at the bottom or side of the air chamber (3), the air suction switch assembly comprising a cavity (4), the air chamber (3) and the cavity (4) being connected via an air suction port (31), the cavity wall of the cavity (4) being provided with an air inlet (41) communicating with the outside, and an air inlet and outlet control valve being also provided on the cavity (4), the control valve cooperating with the air suction port (31) or the air inlet (41) to ensure that only one of the air suction port (31) and the air inlet (41) is in an open state; the cavity (4) is connected to the air suction device (5) via an air suction duct.

2. The air suction switch assembly of a sewing machine air suction table as claimed in claim 1, characterized in that: The cavity (4) is provided with a bottom of the air chamber (3), the air suction port (31) is opened at the bottom of the air chamber (3), and the air inlet (41) is opened at the bottom of the cavity (4) and is located directly below the air suction port (31).

3. The air suction switch assembly of a sewing machine air suction table as claimed in claim 2, characterized in that: The control valve comprises a cylinder, wherein a cylinder body (61) is fixed on the bottom surface of a cavity (4) directly below an air suction port (31), and an air inlet (41) is distributed on the periphery of the cylinder body (61). A piston rod (62) of the cylinder passes upward through the cavity wall and enters the cavity (4), and a valve plate (63) is mounted on the piston rod (62). The piston rod (62) moves up and down to drive the valve plate (63) to close the air suction port (31) or the air inlet (41).

4. The suction switch assembly of a sewing machine suction table as claimed in claim 1, characterized in that: The cavity (4) is also provided with an air outlet interface (42), a filter cover (43) is arranged at the air outlet interface (42), and the air outlet interface (42) is connected to the air suction duct (7) and communicates with the air suction device (5).

5. The air suction switch assembly of a sewing machine air suction table as claimed in claim 1, characterized in that: An air volume adjustment device (8) is also provided on the side wall of the cavity (4).

6. A suction switch assembly for a suction table of a sewing machine as claimed in claim 5, characterized in that: The air volume adjustment device (8) comprises an adjustment plate pivotally connected to the side wall of the cavity and a plurality of air inlet holes arranged around the pivotal portion. The plurality of air inlet holes can be partially or completely closed by rotating the adjustment plate.

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