Normal sewing machine convenient for workshop production

Abstract

The utility model relates to the field of sewing machines, and discloses a lockstitch sewing machine convenient for workshop production, which structurally comprises a rack, a sewing machine main body and a pedal, trundles are arranged on the bottom surface of the rack, a low-voltage motor is arranged in the rack and is in transmission connection with the sewing machine main body, and a battery pack is arranged in the rack and is used for supplying power to the sewing machine main body. The storage battery is additionally arranged for supplying power, laying and traction of ground wires can be reduced, meanwhile, the low-voltage motor is adopted for driving the sewing machine body, the overall voltage is reduced, potential safety hazards are reduced, by arranging the main storage battery and the standby storage battery, the sewing machine is convenient to use, and the service life of the sewing machine is prolonged. When the main storage battery is out of power, the standby storage battery can be automatically switched to independently supply power to the equipment, sewing can be conducted continuously, the situation that the sewing quality is affected by machining interruption is avoided, a warning indicator and a limiting assembly are further arranged to remind a user of charging, and follow-up inconvenience caused by forgetting charging is avoided.

Description

Technical Field

[0001] The utility model relates to the field of sewing machines, and particularly to a flat sewing machine convenient for workshop production. Background Art

[0002] The flat sewing machine is also called a flat car, generally known as a single-needle flat sewing machine. When used in a workshop, it usually needs to be moved according to the position of the material and perform sewing operations at the position where the material is located.

[0003] The flat sewing machines in factory production workshops are usually powered by 220V voltage. The voltage required by the flat sewing machine itself far exceeds the safe voltage, and it often needs to be moved to the material to sew the material. The use location is not fixed. When in use, it needs to be externally connected to a 220V temporary power supply, which has certain safety hazards during mobile use. Moreover, the workshop personnel, flat sewing machines, and A-frames for placing yarn have a large degree of mobility. Therefore, temporarily pulling out the power cord is likely to affect the ground space and has certain safety hazards. Content of the Utility Model

[0004] In view of the above problems, the utility model provides a flat sewing machine convenient for workshop production, the structure of which includes a frame, a sewing machine main body installed at the top of the frame, and a foot pedal installed on the bottom plate at the bottom of the frame. The bottom surface of the frame is provided with casters. Among them, a low-voltage motor is arranged inside the frame and is in transmission connection with the sewing machine main body, and an electromagnetic clutch is connected to the low-voltage motor; a battery pack is arranged inside the frame to supply power for the operation of the sewing machine main body. The battery pack includes a main storage battery and also includes a controller for controlling and allocating the battery. The foot pedal is connected with a contactor to regulate the low-voltage motor.

[0005] Further, the battery pack further includes a backup storage battery. The main storage battery supplies power to the equipment alone and switches to the backup storage battery to supply power to the equipment alone when the power reaches a preset value; the battery pack further includes a warning device electrically connected to the controller. The warning device adopts the form of a lamp or light or both and warns of the situation where the power of the main storage battery reaches the preset value. A limiting component is arranged at the bottom end of the battery pack to limit the movement of the frame when the power of the main storage battery reaches the preset value.

[0006] Further, a protection frame is arranged on the bottom plate at the side end of the frame. The main storage battery and the backup storage battery are both installed on the protection frame, and the main storage battery is installed at the bottom end of the protection frame; the limiting component includes a bracket and a transfer frame that are in transmission cooperation, and a limiting post installed on the transfer frame. The bottom end of the bracket is higher than the bottom end of the protection frame and one end is hinged to the protection frame. The main storage battery is installed on the bracket. The transfer frame is movably installed at the bottom end of the protection frame and is located below the bracket. The limiting post on the transfer frame points to the caster.

[0007] Further, the bracket has a tendency to swing downward with the bottom hinge connection point as the fulcrum. The protective frame has a crossbeam structure within the swing range at the top of the bracket. An activatable blocking beam is provided between the bracket and the crossbeam structure to abut between the bracket and the crossbeam structure to keep the main battery on the bracket horizontal; the downward-swinging bracket contacts the transfer rack and drives the transfer rack to descend so that the limiting post on the transfer rack abuts against the casters.

[0008] Further, an electromagnet is provided at the top end of the blocking beam. The blocking beam located between the bracket and the crossbeam structure is connected to the electromagnet that droops naturally when powered off; the electromagnet is energized and attracted to make the blocking beam rise after the backup battery is started, and the electromagnet droops when the device is powered by the main battery or by an external power supply.

[0009] Further, a spring is provided between the transfer rack and the bottom plate, and the spring provides an elastic force to drive the transfer rack and the limiting post to move upward away from the casters.

[0010] Further, the low-voltage motor includes a 48V DC motor, and the main battery and the backup battery include 48V batteries.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. By adding a battery for power supply, the utility model can reduce the laying and pulling of ground wires when used in the workshop. At the same time, a low-voltage motor is used to drive the sewing machine main body, reducing the overall voltage and potential safety hazards.

[0013] 2. The utility model is provided with two groups of batteries, namely a main battery and a backup battery. When the main battery runs out of power or reaches a preset value, it can automatically switch to the backup battery to supply power to the device alone, enabling continuous sewing to avoid interruption of processing and affecting the sewing quality; and it is also provided with a warning device and a limiting component to remind the user to charge. When the warning device is activated for prompting, the user can charge at an appropriate time, avoiding the inconvenience caused by the user forgetting to charge on the basis of the convenience of using the device due to the battery pack.

[0014] 3. When the main battery is short of power, the utility model uses a mechanical linkage form in which the main battery sinks and drives the transfer rack to make the limiting post abut against the casters to limit the movement of the device. Compared with the form of electronic limitation, it has a more intuitive and controllable form. The user can lift the main battery to make the device have the ability to move temporarily, but because it is more troublesome to lift the main battery, the user will give up continuing to move when moving to a suitable position and perform the necessary charging behavior in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of the overall structure of a flat sewing machine that is convenient for workshop production according to the present utility model.

[0016] Figure 2 This is a flow chart of the present utility model for supplying power to the sewing machine main body through a battery pack via a low-voltage motor.

[0017] Figure 3 This is a three-dimensional structure diagram of the cooperation between the battery pack and the limiting component according to the present utility model.

[0018] Figure 4 This is a side view of the cooperation between the battery pack and the limiting component according to the present utility model.

[0019] Figure 5 This is a side view of the working state of the limiting component according to the present utility model.

[0020] In the figure: 1, frame; 2, sewing machine main body; 3, low-voltage motor; 4, foot pedal; 5, battery pack; 6, limiting component; 11, bottom plate; 12, caster; 13, protection frame; 51, main storage battery; 52, controller; 53, backup storage battery; 54, warning device; 61, bracket; 62, blocking beam; 63, electromagnet; 64, transfer frame; 65, limiting column. Specific embodiments

[0021] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment, such as Figures 1 - 5As shown: The present utility model provides a flat sewing machine convenient for workshop production, whose structure includes a frame 1, a sewing machine main body 2 installed at the top of the frame 1, and a foot pedal 4 provided on a bottom plate 11 at the bottom of the frame 1. The bottom surface of the frame 1 is provided with casters 12 for moving the equipment. In this embodiment, a low-voltage motor 3 is provided inside the frame 1 and is in transmission connection with the sewing machine main body 2. An electromagnetic clutch is connected to the low-voltage motor 3. It can be known that the electromagnetic clutch is a friction clutch that generates a pressing force by electromagnetic force, which is convenient for starting and stopping the low-voltage motor 3. A battery pack 5 is provided inside the frame 1 for supplying power to the operation of the sewing machine main body 2. It can be known that mainly it supplies power to the low-voltage motor 3 and uses the low-voltage motor 3 to drive the sewing machine main body 1 to work. The foot pedal 4 is connected with a contactor to control and regulate the low-voltage motor 3. The maximum load of the switch contacts of the traditional foot pedal 4 is 10A. Since the low-voltage motor 3 has a low voltage and a large current during operation, it will burn out the switch contacts. By adding a contactor, the main load of the low-voltage motor 3 can be transferred, making the load of the foot pedal 4 switch smaller and avoiding the foot pedal 4 switch being burned out due to a large current.

[0023] In this embodiment, the battery pack 5 includes a main storage battery 51 and a controller 52 for controlling and allocating the battery. The controller 52 includes basic hardware for circuit control such as a control board, and can use a single-chip microcomputer or a Raspberry Pi development board, etc.; the battery pack 5 also includes a backup storage battery 53. On the basis of charging and regulating the main storage battery 51 and the backup storage battery 53, the controller 52 also makes the main storage battery 51 supply power to the equipment alone and switches to the backup storage battery 53 to supply power to the equipment alone when the power reaches the preset value by setting the power supply sequence and the power preset value. For the motor and battery used, the low-voltage motor 3 used includes a 48V DC motor, and the main storage battery 51 and the backup storage battery 53 include 48V storage batteries;

[0024] In this embodiment, for the warning operation of the main storage battery 51 being out of power, the battery pack 5 includes a warning device 54 electrically connected to the controller 52. The warning device 54 uses the form of a lamp or light or both and warns about the situation where the power of the main storage battery 51 reaches the preset value, such as using an audible and visual warning device;

[0025] Meanwhile, for the warning operation of the main battery 51 running out of power, a limiting component 6 is provided at the bottom of the battery pack 5 to limit the movement of the rack 1 when the power of the main battery 51 reaches a preset value. Specifically, a protective frame 13 is provided on the bottom plate 11 at the side end of the rack 1. Both the main battery 51 and the backup battery 53 are installed on the protective frame 13, and the main battery 51 is installed at the bottom end of the protective frame 13. The limiting component 6 includes a bracket 61 and a transfer frame 64 that are in transmission cooperation, and a limiting post 65 installed on the transfer frame 64. The bottom end of the bracket 61 is higher than the bottom end of the protective frame 13, and one end is hinged to the protective frame 13. The main battery 51 is installed on the bracket 61. The bracket 61 has a tendency to swing downward with the hinge connection point at the bottom end as the fulcrum. The protective frame 13 has a beam structure within the swinging range of the top end of the bracket 61. A movable blocking beam 62 is provided between the bracket 61 and the beam structure to press against the space between the bracket 61 and the beam structure to keep the main battery 51 on the bracket 61 horizontal.

[0026] An electromagnet 63 is provided at the top end of the blocking beam 62. The blocking beam 62 located between the bracket 61 and the beam structure is connected to the electromagnet 63 that droops naturally when powered off. When the electromagnet 63 is not powered on, it naturally drives the blocking beam 62 to limit the bracket 61. After the backup battery 53 is started, the electromagnet 63 is powered on and attracts to make the blocking beam 62 rise, so that the bracket 61 swings downward to perform subsequent actions. When the device is powered by the main battery 51 or an external power supply, the electromagnet 63 droops when powered off. It can be known that the back of the blocking beam 62 is arc-shaped or inclined. At this time, the bracket 61 can be lifted for fixation.

[0027] The transfer frame 64 is movably installed at the bottom end of the protective frame 13 and is located below the bracket 61. The limiting post 65 on the transfer frame 64 points to the caster 12. The swinging-down bracket 61 contacts the transfer frame 64 and drives the transfer frame 64 to descend under the heavy pressure of the main battery 51, so that the limiting post 65 on the transfer frame 64 abuts against the caster 12. A spring is provided between the transfer frame 64 and the bottom plate 11. The spring provides an elastic force to drive the transfer frame 64 and the limiting post 65 to move upward away from the caster 12. After the bracket 61 is reset, the spring drives the transfer frame 64 and the limiting post 65 to move upward away from the caster 12 to release the restriction on the caster 12.

[0028] In specific implementation, the device is moved to the required work station through the casters 12, and the power supply form is selected. In this embodiment, the battery pack 5 is started first. The main battery 51 supplies power to the low-voltage motor 3, and the sewing machine main body 1 is driven by the low-voltage motor 3 to work. The foot pedal 4 is connected to a contactor to control the speed of the low-voltage motor 3. When sewing and processing, if the main battery 51 runs out of power or the power reaches the preset value, first, it is automatically switched to the backup battery 53 to supply power to the device alone, so that the sewing and processing can continue. At the same time, the warning device 54 is started for prompting, so that the user can charge at an appropriate time.

[0029] However, due to the frequent mobile operation of the device, the simple reminder in the form that can be turned off is likely to make the user forget, resulting in the continuous use of the backup battery 53. When the power runs out later, backup power supply cannot be provided, leading to the stagnation of subsequent processing. Therefore, while cutting off the power supply to the backup battery 53, the electromagnet 63 is energized to attract and close, causing the blocking beam 62 to rise. The bracket 61 without the restriction of the blocking beam 62 swings downward with the bottom hinge connection point as the fulcrum. The downward-swinging bracket 61 contacts the transfer frame 64 and drives the transfer frame 64 to descend under the heavy pressure of the main battery 51, so that the limiting column 65 on the transfer frame 64 abuts against the caster 12, thereby restricting the movement of the device. When the device needs to be stored after use, it cannot be moved, allowing the user to briefly move aside to charge before moving, so as to avoid the subsequent inconvenience caused by the user forgetting to charge on the basis of the convenient use of the device due to the battery pack 5.

[0030] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

Claims

1. A lockstitch sewing machine convenient for workshop production, which structure includes a frame, a sewing machine body mounted on the top of the frame, and a footrest on the bottom plate at the bottom of the frame, and casters are provided on the bottom surface of the frame, characterized in that: A low-voltage motor is arranged in the frame and is in transmission connection with the sewing machine body, and an electromagnetic clutch is connected to the low-voltage motor; A battery pack is arranged in the frame for supplying power to the main body of the sewing machine. The battery pack includes a main storage battery and a controller for controlling and adjusting the battery. The foot pedal is connected with a contactor for regulating the low-voltage motor.

2. A lockstitch sewing machine convenient for workshop production according to claim 1, characterized in that: The battery pack also includes a backup battery, the main battery supplies power to the device alone and switches to the backup battery to supply power to the device alone when the power reaches a preset value; The battery pack also includes an alarm device electrically connected to the controller. The alarm device is in the form of a lamp or light or both and warns when the power of the main battery reaches a preset value. A limiting component is provided at the bottom of the battery pack for limiting the movement of the rack when the power of the main battery reaches a preset value.

3. A lockstitch sewing machine convenient for workshop production according to claim 2, characterized in that: A protection frame is provided on the bottom plate at the side end of the frame, the main battery and the backup battery are both mounted on the protection frame, and the main battery is mounted at the bottom end of the protection frame; The limiting assembly includes a bracket and a transfer frame for transmission cooperation, and a limiting column installed on the transfer frame. The bottom end of the bracket is higher than the bottom end of the protection frame and one end is hingedly connected to the protection frame. The main battery is installed on the bracket, and the transfer frame is movably installed at the bottom end of the protection frame and is located below the bracket. The limiting column on the transfer frame points to the caster.

4. A lockstitch sewing machine convenient for workshop production according to claim 3, characterized in that: The bracket has a tendency to swing downward with the bottom hinge connection point as a fulcrum, and the protection frame has a crossbeam structure in the swing range of the top end of the bracket. A movable blocking beam is provided between the bracket and the crossbeam structure to abut between the bracket and the crossbeam structure to keep the main battery on the bracket horizontal; The bracket swinging downward contacts the intermediate transfer frame and drives the intermediate transfer frame to descend so that the limiting column on the intermediate transfer frame abuts against the caster.

5. A lockstitch sewing machine convenient for workshop production according to claim 4, characterized in that: An electromagnet is provided at the top of the blocking beam, and the blocking beam located between the bracket and the crossbeam structure is connected to the electromagnet that naturally droops when the power is cut off; The electromagnet is powered on and attracted to raise the blocking beam after the backup battery is started, and the electromagnet is powered off and drooped when the equipment is powered by the main battery or by an external power supply.

6. A lockstitch sewing machine convenient for workshop production according to claim 4, characterized in that: A spring is arranged between the intermediate transfer frame and the bottom plate, and the spring provides elastic force to drive the intermediate transfer frame and the limiting column upward and away from the caster.

7. The lockstitch sewing machine convenient for workshop production according to claim 1, characterized in that: The low voltage motor comprises a 48V DC motor, and the main battery and the backup battery comprise 48V batteries.

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