A sewing machine head lifting mechanism

Abstract

The utility model relates to a kind of sewing machine head lifting mechanism, including stand and sewing machine head, the stand top is equipped with speed reducer, the power output shaft of speed reducer is connected with driving sprocket towards stand side, hand wheel is connected on the power input shaft of speed reducer, the lower portion of stand side is rotatably installed with driven sprocket, driving sprocket and driven sprocket are connected with chain;Lifting frame that can slide up and down relative to it is equipped on the stand, the side of lifting frame is equipped with the drive block that is fixedly connected with chain, and the sewing machine head is installed in the front side of lifting frame.The utility model sewing machine head lifting mechanism design is reasonable, realizes the head lifting to adapt to different length bag, and lifting structure is simple and safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of bag sewing machines, and in particular to a bag sewing machine head lifting mechanism. Background Technology

[0002] Currently, automatic bag sewing machines are widely used in the packaging of food, chemicals, and other commodities. Different needs require different lengths and sewing thread heights for the packaging bags. Therefore, a bag sewing machine with a controllable head lifting mechanism is needed to adapt to different bags. However, commonly available methods for controlling the lifting of the sewing machine head are complex and pose safety hazards. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a simple, safe and reliable sewing machine head lifting mechanism that enables the machine head to be lifted to adapt to bags of different lengths.

[0004] This utility model is implemented using the following scheme: a sewing machine head lifting mechanism, including a column and a sewing machine head, a reducer is installed on the top of the column, the power output shaft of the reducer faces one side of the column and is connected to a drive sprocket, a handwheel is connected to the power input shaft of the reducer, a driven sprocket is rotatably installed on the lower part of one side of the column, and a chain is connected between the drive sprocket and the driven sprocket; a lifting frame that can slide up and down relative to the column is provided on the column, a drive block that is fixedly connected to the chain is provided on one side of the lifting frame, and the sewing machine head is installed in front of the lifting frame.

[0005] Furthermore, the speed reducer is a worm gear reducer.

[0006] Furthermore, a cable management frame is fixedly connected to the upper side of the reducer. The cable management frame is horizontally arranged and has an upward-facing slotted structure.

[0007] Furthermore, the side plates on both sides of the thread rack are provided with several thread holes for the sewing thread to pass through. The upper side of the thread holes is provided with a channel that runs through the upper side of the side plate. The opening of the channel is V-shaped, and the middle section of the channel is semi-circular.

[0008] Furthermore, the lifting frame surrounds the column, and the lifting frame includes a mounting plate on one side of the column, a machine head bracket on the front side of the column, and a motor bracket on the other side of the column. The motor bracket passes around the rear side of the column and connects to the mounting plate.

[0009] Furthermore, a pair of vertically arranged guide rails are fixedly connected to one side of the column, and a slider that cooperates with the guide rails is connected to the mounting plate.

[0010] Furthermore, a sewing motor is mounted on the motor bracket, and the sewing motor is connected to the sewing machine head via a transmission device.

[0011] Compared with the prior art, the present invention has the following advantages: The sewing machine head lifting mechanism of the present invention is reasonably designed, realizing the lifting of the machine head to adapt to bags of different lengths. The lifting structure is simple and safe and reliable.

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through specific embodiments and related drawings. Attached Figure Description

[0013] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0014] Figure 2 This is a side view of an embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of the sewing machine head in the lowest position according to an embodiment of this utility model;

[0016] Figure 4 This is a schematic diagram of the sewing machine head in the lowest position according to an embodiment of this utility model;

[0017] Figure 5 This is a partial structural schematic diagram of the cable management frame according to an embodiment of the present invention;

[0018] The numbers in the diagram are as follows: 1-Thread rack, 2-Reducer, 3-Column, 4-Transmission device, 5-Sewing machine head, 6-Sewing motor, 7-Motor bracket, 8-Machine head bracket, 9-Column mounting plate, 10-Drive sprocket, 11-Power output shaft, 12-Handwheel, 13-Guide rail, 14-Control box, 15-Drive block, 16-Mounting plate, 17-Chain, 18-Thread hole, 19-Channel. Detailed Implementation

[0019] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] like Figures 1-5As shown, a sewing machine head lifting mechanism includes a column 3 and a sewing machine head 5. A reducer 2 is mounted on the top of the column 3. The power output shaft of the reducer 2 faces the column and is connected to a drive sprocket 10. A handwheel 12 is connected to the power input shaft of the reducer 2. A driven sprocket is rotatably mounted on the lower part of one side of the column 3. A chain 17 connects the drive sprocket and the driven sprocket. A lifting frame that can slide up and down relative to the column 3 is provided. A drive block 15 fixedly connected to the chain is provided on one side of the lifting frame. The sewing machine head is mounted in front of the lifting frame. This sewing machine head lifting mechanism uses a sprocket and chain to control the lifting, and the lifting structure is simple and safe.

[0022] In this embodiment, the reducer 2 is a worm gear reducer, which has a self-locking function. After the height is adjusted, the sewing machine head is automatically fixed at the specified height.

[0023] In this embodiment, a thread rack 1 is fixedly connected to the upper side of the reducer 2. The thread rack 1 is horizontally arranged and has an upward-facing slotted structure. The horizontal structure of the thread rack can reduce the height of the sewing machine.

[0024] In this embodiment, the side plates on both sides of the thread rack 1 are provided with a plurality of thread-guiding holes 18 for the thread to pass through. A channel 19 is provided above the thread-guiding holes, penetrating the upper side of the side plate. The channel has a V-shaped opening and a semi-circular arc-shaped middle section. The thread enters the thread-guiding holes through the channel, and the semi-circular arc design of the channel prevents the thread from coming out.

[0025] In this embodiment, the lifting frame surrounds the column, and the lifting frame includes a mounting plate 16 located on one side of the column, a machine head bracket 8 located on the front side of the column, and a motor bracket 7 located on the other side of the column. The motor bracket passes around the rear side of the column and connects to the mounting plate.

[0026] In this embodiment, a pair of vertically arranged guide rails 13 are fixedly connected to one side of the column 3, and four sliders that cooperate with the guide rails are connected to the mounting plate, two on each side.

[0027] In this embodiment, a sewing motor 6 is mounted on the motor bracket 7, and the sewing motor 6 is connected to the sewing machine head via a transmission device 4; the transmission device 4 uses a belt and pulleys.

[0028] In this embodiment, a control box 14 is also included, which is mounted on the mounting plate 16.

[0029] The height of the sewing machine head can be adjusted according to different bag lengths. When the sewing machine head needs to be raised, rotating the handwheel 12 causes the reducer 2 to drive the chain clockwise through the sprocket on the power output shaft 11. The sliders on both sides not only guide the sewing machine head 5 but also absorb and reduce the vibration and impact generated during its movement. When the sewing machine head needs to be lowered, rotating the handwheel 12 causes the chain to rotate counterclockwise, thereby lowering the sewing machine head 5. The highest and lowest achievable positions are shown in [reference needed]. Figure 3 , Figure 4 .

[0030] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0031] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integral molding process).

[0032] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0033] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A sewing machine head lifting mechanism, comprising a column and a sewing machine head, characterized in that: A speed reducer is installed on the top of the column. The power output shaft of the speed reducer faces one side of the column and is connected to a drive sprocket. A handwheel is connected to the power input shaft of the speed reducer. A driven sprocket is rotatably installed on the lower part of one side of the column. A chain connects the drive sprocket and the driven sprocket. A lifting frame that can slide up and down relative to the column is provided. A drive block that is fixedly connected to the chain is provided on one side of the lifting frame. The sewing machine head is installed on the front side of the lifting frame.

2. The sewing machine head lifting mechanism according to claim 1, characterized in that: The speed reducer is a worm gear reducer.

3. The sewing machine head lifting mechanism according to claim 1, characterized in that: A cable management frame is fixedly connected to the upper side of the reducer. The cable management frame is horizontally arranged and has an upward-facing slotted structure.

4. The sewing machine head lifting mechanism according to claim 3, characterized in that: The side plates on both sides of the thread rack are provided with several thread holes for the sewing thread to pass through. The upper side of the thread holes is provided with a channel that runs through the upper side of the side plate. The opening of the channel is V-shaped and the middle section of the channel is semi-circular.

5. The sewing machine head lifting mechanism according to claim 1, characterized in that: The lifting frame surrounds the column and includes a mounting plate on one side of the column, a head bracket on the front side of the column, and a motor bracket on the other side of the column. The motor bracket passes around the rear side of the column and connects to the mounting plate.

6. The sewing machine head lifting mechanism according to claim 5, characterized in that: A pair of vertically arranged guide rails are fixedly connected to one side of the column, and a slider that cooperates with the guide rails is connected to the mounting plate.

7. The sewing machine head lifting mechanism according to claim 5, characterized in that: The sewing motor is mounted on the motor bracket, and the sewing motor is connected to the sewing machine head via a transmission device.

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