Composite middle presser foot structure and sewing equipment

Abstract

The invention discloses a composite middle presser foot structure and sewing equipment, and relates to the technical field of sewing equipment, and the composite middle presser foot structure comprises a motor assembly which comprises a presser foot motor fixedly arranged on a machine shell; the air cylinder assembly comprises a presser foot air cylinder movably arranged on the machine shell, and the action end of the presser foot air cylinder is connected with a lifting and pressing executing mechanism of the presser foot through a pull rod; the transmission assembly comprises a swing part arranged at the action end of the presser foot motor, and the swing part is further movably connected with the presser foot air cylinder so as to drive the presser foot air cylinder to move in the axial direction of the action end of the presser foot air cylinder. The presser foot is pressed down and lifted up through the air cylinder assembly, the action response speed is high, meanwhile, the presser foot can be driven by the motor assembly in the sewing process, and the height is adjusted according to the thickness of cloth.

Description

Technical Field

[0001] This application relates to the field of sewing equipment technology, and in particular to a composite presser foot structure and sewing equipment. Background Technology

[0002] In sewing equipment, the presser foot lifting mechanism is mainly used to control the raising and lowering of the presser foot during the sewing process, ensuring the fabric remains flat and wrinkle-free, thereby improving sewing efficiency and accuracy. There are generally two types of existing presser foot lifting mechanisms: one is an electric presser foot lifting mechanism (please refer to...). Figure 1 The first method involves a motor 01 rotating, which drives a swaying gear 02 to rotate. The swaying gear 02 then rotates the swaying shaft, thus raising and lowering the presser foot. The height of the presser foot can be programmed and adjusted via electrical control. However, during the development of this invention, the inventors discovered that the raising and lowering speed of the presser foot is limited by the motor 01 and the gear mechanism, resulting in a relatively slow raising and lowering speed. Another method is a pneumatic presser foot lifting mechanism; please refer to [reference needed]. Figure 2 The presser foot is raised and lowered by the action of cylinder 03. Because the presser foot is driven by cylinder 03, the lifting and lowering speed is very fast. However, the inventors found in the process of realizing this invention that the presser foot height cannot be programmably adjusted by electronic control.

[0003] Therefore, in view of the above-mentioned technical problems, how to achieve programmable adjustment of the presser foot height while ensuring the lifting and pressing speed of the presser foot is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this application is to provide a composite presser foot structure and sewing equipment, which solves the problem of non-programmable adjustment of presser foot height while ensuring the speed of presser foot lifting and pressing.

[0005] To achieve the above objectives, this application provides a composite pressure foot structure, comprising:

[0006] Motor assembly, including a presser foot motor fixedly mounted on the housing;

[0007] The cylinder assembly includes a presser foot cylinder movably mounted on the housing, the actuating end of the presser foot cylinder being connected to the presser foot lifting and pressing actuator via a pull rod;

[0008] The transmission assembly includes a swinging member disposed at the actuating end of the presser foot motor, the swinging member being movably connected to the presser foot cylinder to drive the presser foot cylinder to move axially along its actuating end.

[0009] Preferably, the transmission assembly further includes a swing shaft mounted on the housing, the swing member is rotatably mounted on the swing shaft, the actuating end of the presser foot motor is provided with a driving tooth, the swing member is provided with a driven tooth that meshes with the main gear, and the presser foot cylinder is rotatably connected to the swing member through a shaft screw.

[0010] Preferably, the swing member has an opening corresponding to the swing shaft, the swing member is rotatably configured with the swing shaft through the opening, and a retaining ring is provided on the swing shaft to limit the axial movement of the swing member.

[0011] Preferably, the swinging member is fixedly connected to the actuating end of the presser foot motor so as to achieve swinging under the rotation of the actuating end of the presser foot motor.

[0012] Preferably, the motor assembly further includes a motor mounting plate, which is fixedly disposed on the housing, and the presser foot motor is fixedly mounted on the motor mounting plate;

[0013] The cylinder assembly also includes a cylinder mounting plate, the presser foot cylinder is fixedly mounted on the cylinder mounting plate, and the presser foot cylinder is movably connected to the swing member through the cylinder mounting plate.

[0014] Preferably, it further includes a sensing component for obtaining the swing amplitude of the swinging member. The sensing component includes a sensor mounting plate disposed on the motor mounting plate, a sensor disposed on the sensor mounting plate, and a sensing sheet fixedly disposed on the actuating end of the presser foot motor. The sensing sheet has a protrusion corresponding to the sensor.

[0015] Preferably, the presser foot motor is a programmable servo motor or a stepper motor.

[0016] Preferably, the presser foot cylinder is movably mounted on the housing along a preset movement direction via a sliding mechanism.

[0017] A sewing device includes a housing and a middle presser foot structure disposed on the housing, wherein the middle presser foot structure is the composite middle presser foot structure described above.

[0018] Preferably, the system further includes a control system, which is signal-connected to the motor assembly, cylinder assembly, and sensing assembly to control the opening and closing of the solenoid valve of the presser foot cylinder in the cylinder assembly, and to control the movement amplitude of the presser foot motor in the motor assembly according to the feedback signal from the sensing assembly.

[0019] Compared to the aforementioned background technology, the motor assembly of this application includes a presser foot motor fixedly mounted on the machine housing, and a cylinder assembly including a presser foot cylinder movably mounted on the machine housing. The actuating end of the presser foot cylinder can be connected to the presser foot lifting and pressing actuator via a pull rod, thereby driving the pull rod and the lifting and pressing actuator to move, thus driving the presser foot to lift and press down. A transmission assembly connects the presser foot motor and the presser foot cylinder. Specifically, the transmission assembly includes a swinging component located at the actuating end of the presser foot motor, which is also movably connected to the presser foot cylinder. Under the drive of the presser foot motor, the presser foot cylinder is driven to move axially along its actuating end, thereby adjusting the initial height of the presser foot to accommodate fabrics of different thicknesses. This application achieves presser foot pressing and lifting through the cylinder assembly, with a fast action response speed. Simultaneously, during sewing, the presser foot can be driven by the motor assembly to adjust its height according to the fabric thickness. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an electric pressure foot lifting mechanism in the prior art;

[0022] Figure 2 This is a schematic diagram of the structure of the presser foot lifting mechanism in the prior art;

[0023] Figure 3 This is a schematic diagram of the composite pressure foot structure provided in the embodiments of this application;

[0024] Figure 4 This is a three-dimensional structural diagram of the composite pressure foot structure provided in the embodiments of this application;

[0025] Figure 5 This is a front view of the composite pressure foot structure provided in the embodiments of this application;

[0026] Figure 6 This is a schematic diagram of the disassembly structure of the composite pressure foot provided in the embodiments of this application;

[0027] Figure 7 This is a schematic diagram of another disassembled structure of the composite pressure foot structure provided in the embodiments of this application.

[0028] In the diagram: 01-Motor; 02-Rotating gear; 03-Cylinder;

[0029] 10-Casing;

[0030] 20-Central pressure foot structure; 201-Pressure foot motor; 202-Motor mounting plate; 203-Sensor mounting plate; 204-Sensor; 205-Active gear; 206-Sensing element; 207-Oscillating component; 208-Oscillating shaft; 209-Retaining ring; 210-Cylinder mounting plate; 211-Pressure foot cylinder; 212-Pull rod; 213-Shaft screw; 214-Lifting and pressing actuator. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that in this embodiment, the orientation or positional relationship indicated by terms such as "upper," "lower," "front," and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. It is used only for the convenience of describing this application and for simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 3 As shown, in this embodiment, a composite presser foot structure is provided. The structure includes a motor assembly, a cylinder assembly, and a transmission assembly. The motor assembly includes a presser foot motor 201 fixedly mounted on the housing 10. The cylinder assembly includes a presser foot cylinder 211 movably mounted on the housing 10. The actuating end of the presser foot cylinder 211 is connected to the presser foot lifting and pressing actuator 214 via a pull rod 212. The specific arrangement of the pull rod 212 and the lifting and pressing actuator 214 can refer to the prior art and will not be described in detail here. It is ensured that the presser foot cylinder 211 can drive the pull rod 212 and the lifting and pressing actuator to move, so as to realize the lifting and pressing action of the presser foot. The transmission assembly includes a swing member 207 located at the actuating end of the presser foot motor 201. The presser foot motor 201 can drive the swing member 207 to perform a swinging operation. The swing member 207 is also movably connected to the presser foot cylinder 211, so that the swing member 207 drives the presser foot cylinder 211 to move. Specifically, the swing of the swing member 207 can drive the presser foot cylinder 211 to move axially along its actuating end.

[0035] It should be noted that the actuating end of the presser foot cylinder 211 can drive the pull rod 212 to move through axial movement, thereby driving the lifting and pressing actuator and the presser foot to move. Therefore, based on the movement of the presser foot cylinder 211 driven by the swinging component 207, the initial position of the presser foot cylinder 211 can be changed, thereby adjusting the initial height of the presser foot to achieve automatic adjustment of the presser foot height.

[0036] In summary, the motor assembly of this application includes a presser foot motor 201 fixedly mounted on the housing 10, and a cylinder assembly including a presser foot cylinder 211 movably mounted on the housing 10. The actuating end of the presser foot cylinder 211 can be connected to the presser foot lifting and pressing actuator 214 via a pull rod 212, thereby driving the pull rod 212 and the lifting and pressing actuator 214 to move, thus driving the presser foot to lift and press down. The transmission assembly is used to connect the presser foot motor 201 and the presser foot cylinder 211. Specifically, the transmission assembly includes a swing member 207 located at the actuating end of the presser foot motor 201. The swing member 207 is also movably connected to the presser foot cylinder 211, thereby driving the presser foot cylinder 211 to move axially along its actuating end under the drive of the presser foot motor 201, thereby adjusting the initial height of the presser foot to accommodate fabrics of different thicknesses. This application uses a cylinder assembly to press down and lift the presser foot, resulting in a fast response speed. At the same time, during the sewing process, the presser foot can be driven by a motor assembly to adjust its height according to the fabric thickness.

[0037] Please refer to Figure 4 and Figure 5 The transmission assembly also includes a swing shaft 208 mounted on the housing 10. Typically, the housing 10 has an internal cavity structure, and the swing shaft 208 is fixedly located within this cavity. Both the drive assembly and the cylinder assembly can be housed within the cavity, or partially within both, thus providing some protection. The swing element 207 is rotatably mounted on the swing shaft 208 and can rotate around the axis of the swing shaft 208. Driven by the actuating end of the presser foot motor 201, the swing element 207 performs a swinging operation.

[0038] Based on the above embodiment, a drive gear 205 can be provided at the actuating end of the presser foot motor 201. The drive gear 205 can be a gear sleeve, which is fixed to the actuating end of the presser foot motor 201 by a pin. The swing member 207 is provided with a driven gear that meshes with the drive gear 205. Please refer to [reference needed] for details. Figure 6 The gear sleeve can be fitted onto the outer periphery of the actuating end of the presser foot motor 201. The outer edge of one side of the swing member 207 is provided with driven teeth. It should be noted that the outer edge of the swing member 207 should be an arc-shaped structure that fits the gear sleeve, so as to ensure that the driven teeth on the swing member 207 can always mesh with the driving teeth 205 on the gear sleeve within the preset rotation range, thereby ensuring that the presser foot motor 201 drives the swing member 207 to swing.

[0039] The presser foot cylinder 211 is also rotatably connected to the swing member 207 via a shaft screw 213 or other fastening device, so that the presser foot cylinder 211 can be smoothly driven to move during the swing of the swing member 207. It should be noted that since the swing member 207 drives the presser foot cylinder 211 to move in the form of swinging motion, the presser foot cylinder 211 needs to be rotatably connected to the swing member 207 to overcome the influence of the rotation of the swing member 207 on the movement of the presser foot cylinder 211.

[0040] In some embodiments, to ensure that the swing member 207 can rotate smoothly on the swing shaft 208, an auxiliary component such as a rotating shaft can be provided at the connection between the two, that is, the swing member 207 is rotatably mounted on the swing shaft 208 via a bearing. Correspondingly, the swing member 207 is provided with an opening corresponding to the swing shaft 208, the swing member 207 is rotatably mounted with the swing shaft 208 through the opening, and a retaining ring 209 is provided on the swing shaft 208 to axially limit the swing member 207.

[0041] In another embodiment, the swing member 207 can be directly and fixedly connected to the actuating end of the presser foot motor 201. Please refer to [reference needed]. Figure 7 At this time, the power end of the presser foot motor 201 can directly drive the swing component 207 to rotate. Similarly, the swing component 207 is also rotatably connected to the presser foot cylinder 211, so that the swing component 207 can swing under the action of the rotating end of the presser foot motor 201.

[0042] The aforementioned motor assembly also includes a motor mounting plate 202, which is fixedly mounted on the housing 10. The presser foot motor 201 is fixedly mounted on the motor mounting plate 202, thereby providing stable support for the presser foot motor 201. The cylinder assembly also includes a cylinder mounting plate 210, on which the presser foot cylinder 211 is fixedly mounted. The presser foot cylinder 211 is movably connected to the swing member 207 through the cylinder mounting plate 210. For details, please refer to... Figure 4 and Figure 7 .

[0043] In some embodiments, the composite pressure foot structure of this application further includes a sensing component for acquiring the swing amplitude of the swing member 207. Please refer to... Figure 6 The sensing component includes a sensor mounting plate 203 mounted on the motor mounting plate 202, a sensor 204 mounted on the sensor mounting plate 203, and a sensing plate 206 fixedly mounted on the actuating end of the presser foot motor 201. The sensing plate 206 has a protrusion corresponding to the sensor 204. During the programmable height adjustment of the presser foot, the sensor 204 finds the origin position through the sensing plate 206, thereby obtaining the rotation amplitude of the actuating end of the presser foot motor 201 relative to the initial position, and then evaluating the rotation amplitude of the swing member 207. The rotation amplitude of the swing member 207 directly affects the adjustable height of the presser foot.

[0044] Considering that the presser foot motor 201 of this application needs to be programmable and has high control precision, the presser foot motor 201 of this application adopts a programmable servo motor or stepper motor, etc. Of course, with the continuous development of technology, it is possible to invent a controllable motor with higher precision, all of which fall within the protection scope of this application. It is sufficient to ensure that the presser foot motor 201 of this application has a certain control precision and can be programmably controlled.

[0045] As mentioned above, the presser foot cylinder 211 is a cylinder that is movable inside the housing 10. Therefore, the presser foot cylinder 211 can be moved in a preset direction by the movable mechanism. When the servo motor or stepper motor has a brake function, the presser foot cylinder 211 can have a fixed position after the position is adjusted, so that the presser foot is at a stable height.

[0046] This application also provides a sewing device, including a housing 10 and a middle presser foot structure 20 disposed on the housing 10, wherein the middle presser foot structure 20 is the aforementioned composite middle presser foot structure; furthermore, it includes a control system, which is signal-connected to a motor assembly, a cylinder assembly, and a sensing assembly to control the opening and closing of the solenoid valve of the presser foot cylinder 211 in the cylinder assembly, and to control the movement amplitude of the presser foot motor 201 in the motor assembly according to the feedback signal from the sensing assembly.

[0047] In the implementation process, firstly, when starting to sew, the control system outputs a signal to the solenoid valve of the presser foot cylinder 211. The solenoid valve actuates, driving the presser foot cylinder 211 to lift and press down the presser foot. When it is necessary to adjust the presser foot height according to the fabric thickness during sewing, the control system outputs a signal to the presser foot motor 201 and controls the rotation amplitude of the pressing foot motor 201's actuating end according to the feedback signal of the sensor 204, thereby realizing the programmable adjustment of the presser foot height driven by the rotation of the presser foot motor 201. The programmable adjustment action control method of this application is implemented as follows: the presser foot motor 201 finds the origin position through the sensing plate 206. The rotation of the presser foot motor 201 drives the drive wheel to rotate, which in turn drives the driven wheel to move, thereby driving the swinging component 207 to swing. The swinging component 207 drives the presser foot cylinder 211 to move through the shaft screw 213, thereby driving the presser foot to achieve height adjustment.

[0048] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0049] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A composite medium pressure foot structure, characterized in that, include: The motor assembly includes a presser foot motor (201) fixedly mounted on the housing (10). The cylinder assembly includes a foot cylinder (211) movably mounted on the housing (10), the actuating end of which is connected to the foot lifting actuator (214) via a pull rod (212); The transmission assembly includes a swing member (207) disposed at the actuating end of the presser foot motor (201), the swing member (207) being movably connected to the presser foot cylinder (211) to drive the presser foot cylinder (211) to move axially along its actuating end.

2. The composite pressure foot structure according to claim 1, characterized in that, The transmission assembly also includes a swing shaft (208) mounted on the housing (10), the swing member (207) is rotatably mounted on the swing shaft (208), the actuating end of the presser foot motor (201) is provided with a driving tooth (205), the swing member (207) is provided with a driven tooth that meshes with the main gear, and the presser foot cylinder (211) is rotatably connected to the swing member (207) through a shaft screw (213).

3. The composite pressure foot structure according to claim 2, characterized in that, The swing member (207) is provided with an opening corresponding to the swing shaft (208). The swing member (207) is rotatably connected to the swing shaft (208) through the opening, and a retaining ring (209) is provided on the swing shaft (208) to limit the axial movement of the swing member (207).

4. The composite pressure foot structure according to claim 1, characterized in that, The swinging component (207) is fixedly connected to the actuating end of the presser foot motor (201) so as to swing under the rotation of the actuating end of the presser foot motor (201).

5. The composite pressure foot structure according to any one of claims 1-4, characterized in that, The motor assembly also includes a motor mounting plate (202), which is fixedly disposed on the housing (10), and the presser foot motor (201) is fixedly mounted on the motor mounting plate (202); The cylinder assembly also includes a cylinder mounting plate (210), the presser foot cylinder (211) is fixedly mounted on the cylinder mounting plate (210), and the presser foot cylinder (211) is movably connected to the swing member (207) through the cylinder mounting plate (210).

6. The composite pressure foot structure according to claim 5, characterized in that, It also includes a sensing component for obtaining the swing amplitude of the swing member (207). The sensing component includes a sensor mounting plate (203) disposed on the motor mounting plate (202), a sensor (204) disposed on the sensor mounting plate (203), and a sensing plate (206) fixedly disposed on the actuating end of the presser foot motor (201). The sensing plate (206) has a protrusion corresponding to the sensor (204).

7. The composite pressure foot structure according to claim 1, characterized in that, The presser foot motor (201) is a programmable servo motor or a stepper motor.

8. The composite pressure foot structure according to claim 1, characterized in that, The foot presser cylinder (211) is movably mounted on the housing (10) along a preset movement direction via a sliding mechanism.

9. A sewing device, comprising a housing (10), characterized in that, It also includes a middle pressure foot structure (20) disposed on the housing (10), wherein the middle pressure foot structure (20) is the composite middle pressure foot structure as described in any one of claims 1-8.

10. The sewing equipment according to claim 9, characterized in that, It also includes a control system, which is connected to the motor assembly, cylinder assembly and sensing assembly by signal to control the opening and closing of the solenoid valve of the foot cylinder (211) in the cylinder assembly, and controls the movement amplitude of the foot motor (201) in the motor assembly according to the feedback signal of the sensing assembly.

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