Needle cooling mechanism of sewing machine

Abstract

The utility model relates to the technical field of sewing machines, and discloses a machine needle cooling mechanism of a sewing machine, which comprises a sewing machine body, a driving shaft and a machine needle, the driving shaft is arranged inside the sewing machine body, the machine needle is fixedly arranged on the inner wall of the bottom end of the driving shaft, and a through groove is arranged inside the driving shaft. When the driving shaft provided by the utility model descends, the piston is driven to slide along the inner wall of the fixed cylinder, so that external air enters the connecting box from the air inlet of the connecting box under the action of air pressure, the internal air passes through the semiconductor chilling plate to be cooled, and the contact effect of the air and the semiconductor chilling plate is improved by the guide plate; the air pushes a sealing block to extrude a second spring to be compressed, so that the cooled air enters the fixed cylinder, and then the driving shaft ascends to drive a piston to ascend, so that the air in the fixed cylinder enters the fixed cylinder through an air inlet, and the machine needle in the fixed cylinder can be cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a needle cooling mechanism for a sewing machine. Background Art

[0002] A sewing machine is a mechanical device used to sew fabrics and other materials. It usually consists of a needle and a thread, and forms stitches by passing the thread through the fabric through reciprocating motion. There are many different types of sewing machines, including manual sewing machines, electric sewing machines, and computer sewing machines, etc. The invention of the sewing machine has greatly improved the sewing efficiency and quality, and is one of the indispensable devices in the modern textile industry.

[0003] In the prior art, during the use of a sewing machine, the needle continuously moves up and down reciprocally for sewing operations. During the up and down reciprocating movement, the needle will be subjected to friction and heat up. If the heat of the needle is not processed in time, it will affect the service strength of the needle, and at the same time, it will affect the fabric during sewing. Therefore, the present application designs a needle cooling mechanism for a sewing machine. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that in the prior art, during the use of a sewing machine, the needle continuously moves up and down reciprocally for sewing operations, and during the up and down reciprocating movement, the needle will be subjected to friction and heat up. If the heat of the needle is not processed in time, it will affect the service strength of the needle, and at the same time, it will affect the fabric during sewing, and to propose a needle cooling mechanism for a sewing machine.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A needle cooling mechanism for a sewing machine, including a sewing machine body, a drive shaft, and a needle. The drive shaft is arranged inside the sewing machine body. The needle is fixedly arranged on the inner wall of the bottom end of the drive shaft. A through groove is opened inside the drive shaft. The needle extends to the inner wall of the drive shaft located in the through groove. A fixed cylinder is fixedly connected inside the sewing machine body. The drive shaft penetrates through the fixed cylinder. A connection box is fixedly connected to the side wall of the fixed cylinder. A semiconductor refrigeration sheet is fixedly connected to the bottom of the connection box. A heat dissipation fan is fixedly connected to the bottom of the semiconductor refrigeration sheet. A first through hole is simultaneously opened at the connection between the fixed cylinder and the connection box. A second through hole is opened at the bottom of the drive shaft. A piston is fixedly sleeved on the shaft body of the drive shaft located inside the fixed cylinder. The piston is slidably arranged on the inner wall of the fixed cylinder. An air inlet is opened on the shaft body of the drive shaft located inside the fixed cylinder.

[0007] Preferably, a plurality of flow guiding plates are fixedly connected to the inner wall of the connection box. The plurality of flow guiding plates are arranged in a staggered manner. An air inlet hole is fixedly connected to the side wall of the connection box.

[0008] Preferably, a plurality of heat dissipation rings are fixedly connected to the side wall of the sewing needle, and a plurality of air vents are formed in the inner wall of the heat dissipation ring.

[0009] Preferably, an air release cylinder is fixedly connected to the shaft wall of the driving shaft located in the second through hole. A first spring is fixedly connected to the inner wall of the air release cylinder. The end of the first spring is fixedly connected to a stop block, and the side wall of the stop block is slidably arranged on the inner wall of the air release cylinder.

[0010] Preferably, a fixing pipe is fixedly connected to the inner wall of the connection box located in the first through hole. A second spring is fixedly connected to the inner wall of the connection box located in the fixing pipe. A retaining ring is fixedly connected to the inner wall of the fixing pipe. The end of the second spring is fixedly connected to a sealing block, and the sealing block is pressed against the side wall of the retaining ring.

[0011] Preferably, the side wall of the sealing block is semicircular. A groove matching the sealing block is formed in the side wall of the retaining ring. A sealing gasket is fixedly connected to the inner wall of the retaining ring, and the sealing block is pressed against the side wall of the sealing gasket.

[0012] Compared with the prior art, the utility model provides a needle cooling mechanism for a sewing machine, which has the following beneficial effects:

[0013] 1. For the needle cooling mechanism of the sewing machine, when the driving shaft descends, the piston is driven to slide along the inner wall of the fixed cylinder, so that the external gas enters the interior of the connection box through the air inlet hole of the connection box under the action of air pressure. The gas passes through the semiconductor refrigeration sheet to cool the gas. The flow guide plate improves the contact effect between the gas and the semiconductor refrigeration sheet. The gas pushes the sealing block to compress the second spring, so that the cooled gas enters the interior of the fixed cylinder. Subsequently, when the driving shaft rises, the piston rises, and the gas in the fixed cylinder enters the interior of the fixed cylinder through the air inlet, so as to cool the sewing needle inside the fixed cylinder.

[0014] 2. For the needle cooling mechanism of the sewing machine, when the gas enters the fixed cylinder, the gas will push the second spring to rebound and push the sealing block to be pressed against the side wall of the retaining ring. The sealing gasket can improve the sealing performance, so that the gas can fully enter the interior of the driving shaft and prevent the gas from leaking. A plurality of heat dissipation rings are arranged on the side wall of the sewing needle, which can improve the heat exchange efficiency of the sewing needle. A plurality of air vents are arranged on the side wall of the heat dissipation ring to facilitate the discharge of the gas after heat exchange.

[0015] 3. For the needle cooling mechanism of this sewing machine, when gas moves through the heat dissipation ring to the bottom of the drive shaft, it will push the stopper to drive the first spring to compress, enabling the heat-exchanged gas to be discharged through the air vent holes on the air release cylinder in a timely manner, preventing gas from being squeezed inside the drive shaft and causing increased air pressure. When the drive shaft moves downward, the stopper inside the air release cylinder is arranged on the left inner wall of the air release cylinder where the air vent holes are located, keeping the air release cylinder in a sealed state, which can ensure that the second spring compresses when the piston moves downward, allowing gas to enter the fixed cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of a needle cooling mechanism of a sewing machine proposed by the present utility model;

[0017] Figure 2 is Figure 1 an enlarged structural diagram of part A in FIG.;

[0018] Figure 3 is Figure 1 an enlarged structural diagram of part B in FIG.;

[0019] Figure 4 is Figure 2 an enlarged structural diagram of part C in FIG.

[0020] In the figure: 1 sewing machine body, 2 drive shaft, 3 sewing needle, 4 fixed cylinder, 5 connection box, 6 semiconductor refrigeration sheet, 7 cooling fan, 8 deflector, 9 piston, 10 heat dissipation ring, 11 air release cylinder, 12 first spring, 13 stopper, 14 fixed pipe, 15 second spring, 16 sealing block, 17 retaining ring, 18 sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] Refer to Figures 1-4, A needle cooling mechanism for a sewing machine, comprising a sewing machine body 1, a drive shaft 2 and a sewing needle 3. The drive shaft 2 is arranged inside the sewing machine body 1, and the sewing needle 3 is fixedly arranged on the inner wall of the bottom end of the drive shaft 2. A through groove is formed inside the drive shaft 2, and the sewing needle 3 extends to the inner wall of the drive shaft 2 located in the through groove. A fixed cylinder 4 is fixedly connected inside the sewing machine body 1, the drive shaft 2 passes through the fixed cylinder 4, a connection box 5 is fixedly connected to the side wall of the fixed cylinder 4, a semiconductor refrigeration sheet 6 is fixedly connected to the bottom of the connection box 5, and a heat dissipation fan 7 is fixedly connected to the bottom of the semiconductor refrigeration sheet 6. A first through hole is simultaneously formed at the connection between the fixed cylinder 4 and the connection box 5, a second through hole is formed at the bottom of the drive shaft 2, and a piston 9 is fixedly sleeved on the shaft body of the drive shaft 2 located inside the fixed cylinder 4. The piston 9 is slidably arranged on the inner wall of the fixed cylinder 4, and an air inlet is formed on the shaft body of the drive shaft 2 located inside the fixed cylinder 4.

[0023] A fixed pipe 14 is fixedly connected to the inner wall of the connection box 5 located at the first through hole, a second spring 15 is fixedly connected to the inner wall of the connection box 5 located at the fixed pipe 14, a retaining ring 17 is fixedly connected to the inner wall of the fixed pipe 14, the end of the second spring 15 is fixedly connected to a sealing block 16, the sealing block 16 is pressed against the side wall of the retaining ring 17, the side wall of the sealing block 16 is semicircular, a groove matching the sealing block 16 is formed on the side wall of the retaining ring 17, a sealing gasket 18 is fixedly connected to the inner wall of the retaining ring 17, and the sealing block 16 is pressed against the side wall of the sealing gasket 18.

[0024] A plurality of flow guide plates 8 are fixedly connected to the inner wall of the connection box 5, the plurality of flow guide plates 8 are arranged in a staggered manner, an air inlet hole is fixedly connected to the side wall of the connection box 5, a plurality of heat dissipation rings 10 are fixedly connected to the side wall of the sewing needle 3, and a plurality of air vents are formed in the inner wall of the heat dissipation ring 10.

[0025] During use, the drive shaft 2 drives the sewing needle 3 to reciprocate up and down. When the drive shaft 2 descends, it can drive the piston 9 to slide along the inner wall of the fixed cylinder 4, causing the external gas to enter the inside of the connection box 5 from the air inlet hole of the connection box 5 under the action of air pressure. The gas passing through the semiconductor refrigeration sheet 6 can cool the gas. The flow guide plates 8 can improve the contact effect between the gas and the semiconductor refrigeration sheet 6. The gas pushes the sealing block 16 to compress the second spring 15, enabling the cooled gas to enter the inside of the fixed cylinder 4. Subsequently, when the drive shaft 2 rises, it can drive the piston 9 to rise, causing the gas inside the fixed cylinder 4 to enter the inside of the fixed cylinder 4 through the air inlet, cooling the sewing needle 3 inside the fixed cylinder 4. When the gas enters the fixed cylinder 4, the gas will push the second spring 15 to rebound and push the sealing block 16 to be pressed against the side wall of the retaining ring 17. The sealing gasket 18 can improve the sealing performance, enabling the gas to fully enter the inside of the drive shaft 2 and preventing gas leakage. A plurality of heat dissipation rings 10 are provided on the side wall of the sewing needle 3 to improve the heat exchange efficiency of the sewing needle 3, and a plurality of air vents are provided on the side wall of the heat dissipation ring 10 to facilitate the discharge of the gas after heat exchange.

[0026] To facilitate the discharge of the gas after heat exchange, as Figures 1-4 shown, a deflation cylinder 11 is fixedly connected to the shaft wall of the second through hole where the drive shaft 2 is located. A first spring 12 is fixedly connected to the inner wall of the deflation cylinder 11. The end of the first spring 12 is fixedly connected to a stopper 13, and the side wall of the stopper 13 is slidably arranged on the inner wall of the deflation cylinder 11.

[0027] When the gas moves through the heat dissipation ring 10 to the bottom of the drive shaft 2, it will push the stopper 13 to drive the compression of the first spring 12 so that the heat-exchanged gas can be discharged through the deflation holes on the deflation cylinder 11 in time, preventing the gas from being squeezed inside the drive shaft 2 and causing an increase in air pressure. When the drive shaft 2 moves downward, the stopper 13 inside the deflation cylinder 11 is arranged on the left inner wall of the deflation cylinder 11 where the deflation hole is located, making the deflation cylinder 11 in a sealed state, which can ensure that the second spring 15 is compressed when the piston 9 moves downward, so that the gas can enter the inside of the fixed cylinder 4.

[0028] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A sewing machine needle cooling mechanism, comprising a sewing machine body (1), a drive shaft (2) and a sewing machine needle (3), characterized in that: The drive shaft (2) is arranged inside the sewing machine body (1), the needle (3) is fixedly arranged on the inner wall of the bottom end of the drive shaft (2), a through groove is opened inside the drive shaft (2), the needle (3) extends to the inner wall of the drive shaft (2) located at the through groove, a fixed cylinder (4) is fixedly connected to the inside of the sewing machine body (1), the drive shaft (2) passes through the fixed cylinder (4), a connecting box (5) is fixedly connected to the side wall of the fixed cylinder (4), and the bottom of the connecting box (5) is fixedly connected to the connecting box (5). A semiconductor refrigeration sheet (6) is connected, and a heat dissipation fan (7) is fixedly connected to the bottom of the semiconductor refrigeration sheet (6). A first through hole is provided at the connection between the fixed cylinder (4) and the connection box (5), and a second through hole is provided at the bottom of the drive shaft (2). A piston (9) is fixedly sleeved on the shaft body of the drive shaft (2) located inside the fixed cylinder (4), and the piston (9) is slidably arranged on the inner wall of the fixed cylinder (4). An air inlet is provided on the shaft body of the drive shaft (2) located inside the fixed cylinder (4).

2. A sewing machine needle cooling mechanism according to claim 1, characterized in that: A plurality of guide plates (8) are fixedly connected to the inner wall of the connection box (5), and the plurality of guide plates (8) are arranged in a staggered manner. An air inlet hole is fixedly connected to the side wall of the connection box (5).

3. The sewing machine needle cooling mechanism according to claim 1, characterized in that: A plurality of heat dissipation rings (10) are fixedly connected to the side wall of the needle (3), and a plurality of air holes are provided on the inner wall of the heat dissipation ring (10).

4. The sewing machine needle cooling mechanism according to claim 1, characterized in that: The drive shaft (2) is fixedly connected to a deflation cylinder (11) on the shaft wall of the second through hole, the inner wall of the deflation cylinder (11) is fixedly connected to a first spring (12), the end of the first spring (12) is fixedly connected to a stopper (13), and the side wall of the stopper (13) is slidably arranged on the inner wall of the deflation cylinder (11).

5. The sewing machine needle cooling mechanism according to claim 1, characterized in that: The connection box (5) is fixedly connected to a fixing tube (14) on the inner wall of the first through hole, the connection box (5) is fixedly connected to a second spring (15) on the inner wall of the fixing tube (14), the inner wall of the fixing tube (14) is fixedly connected to a retaining ring (17), the end of the second spring (15) is fixedly connected to a sealing block (16), and the sealing block (16) is pressed against the side wall of the retaining ring (17).

6. A sewing machine needle cooling mechanism according to claim 5, characterized in that: The side wall of the sealing block (16) is arranged in a semicircular shape, the side wall of the retaining ring (17) is provided with a groove matching the sealing block (16), the inner wall of the retaining ring (17) is fixedly connected with a sealing gasket (18), and the sealing block (16) is pressed against the side wall of the sealing gasket (18).

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