Seal dustproof structure for tooth frame of sewing machine

Abstract

The utility model provides a sealing dustproof structure of a sewing machine tooth frame, which comprises a machine body and a tooth frame assembly, a tooth frame slideway is arranged on the machine body, and the tooth frame assembly is arranged in the tooth frame slideway; a sealing matching section is arranged on the tooth frame assembly; a sealing piece positioning frame is connected in the tooth frame sliding way, a sealing piece is arranged on the sealing piece positioning frame, and the sealing piece is matched with the sealing matching section on the tooth frame assembly in a sealing mode. According to the utility model, the sealing element positioning frame and the sealing element are arranged in the feed dog slide way, and the sealing element is in sealing fit with the feed dog assembly, so that external dust, particulate matters and the like are prevented from entering a fit clearance between the pressing frame assembly and the machine body, the sliding smoothness of the feed dog assembly is ensured, the abrasion of the feed dog assembly is reduced, and the service life of the feed dog assembly is prolonged. And the precision of the tooth frame assembly is improved.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and in particular to a sealing and dustproof structure for a sewing machine teeth. Background Technology

[0002] The feed dog is a crucial component of a sewing machine. It is housed in a feed dog track within the machine body and driven by the machine's power system. The eccentric crank of the feed dog reciprocates under the action of an eccentric bushing, causing the feed dog base to oscillate synchronously. This allows the feed dog to move along an arc-shaped trajectory, thus achieving the feeding function. During this process, the feed dog contacts the fabric, and its helical teeth on its top surface drive the fabric to be fed in the same direction, completing the automatic continuous sewing operation.

[0003] However, in order to ensure the smooth sliding of the dental cartilage, there is a certain clearance between the dental cartilage and the dental cartilage track. The existence of this clearance allows external dust and particles to enter the clearance, causing the dental cartilage to jam and affecting the smoothness of the sliding. In addition, the presence of particles and dust will also cause greater wear to the dental cartilage components, causing the clearance to increase further and affecting the sliding accuracy of the dental cartilage. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a sealing and dustproof structure for sewing machine teeth.

[0005] The purpose of this utility model is achieved through the following technical solution: a sealing and dustproof structure for a sewing machine feeder, including a machine body and a feeder assembly. A feeder slide is provided on the machine body, and the feeder assembly is disposed in the feeder slide. A sealing mating section is provided on the feeder assembly. A sealing element positioning frame is connected in the feeder slide, and a sealing element is provided on the sealing element positioning frame. The sealing element and the sealing mating section on the feeder assembly are sealed together.

[0006] Preferably, the seal positioning bracket includes a positioning bracket body, on which a through groove and a seal slot are provided, and the seal is installed in the seal slot; the seal is annular, and the toothed bracket assembly passes through the seal.

[0007] Preferably, the positioning frame body is provided with an extension, which is connected to the machine body by fixing screws.

[0008] Preferably, the tooth frame slide is provided with positioning slots on both sides, and the two sides of the positioning frame body are inserted into the positioning slots; the body is provided with grooves, and the extension is embedded in the grooves.

[0009] Preferably, the bottom of the groove is provided with a threaded hole, and the extension is provided with a screw through hole. The fixing screw passes through the screw through hole on the extension and is connected to the threaded hole.

[0010] Preferably, one end of the sealing element slot is an open end, and the sealing element is inserted into the opening end of the sealing element slot.

[0011] Preferably, the seal is made of nitrile rubber.

[0012] The beneficial effects of this utility model are:

[0013] 1. By setting a sealing positioning frame and a sealing element in the tooth holder slide, the sealing fit between the sealing element and the tooth holder assembly prevents external dust, particles, etc. from entering the gap between the tooth holder assembly and the machine body, thereby ensuring the smooth sliding of the tooth holder assembly, reducing the wear on the tooth holder assembly, and improving the accuracy of the tooth holder assembly.

[0014] 2. To ensure lubrication during the sliding of the jaw assembly, operators will add lubricating oil between the jaw assembly and the machine body. The setting of the seal can greatly reduce the rate of lubricating oil loss and increase the retention time of lubricating oil between the jaw assembly and the machine body, thereby enabling the jaw assembly to receive high-quality lubrication for a longer period of time and reducing the frequency of lubricating oil addition. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is an exploded view of the present invention.

[0017] Figure 3 This is a schematic diagram of the seal being installed in the seal positioning bracket.

[0018] Figure 4 This is a schematic diagram of the sealing element positioning bracket.

[0019] Figure 5 for Figure 2 Enlarged view of section A.

[0020] In the diagram: 1. Body, 1a. Tooth carrier slide, 1b. Positioning slot, 1c. Groove, 1d. Threaded hole, 2. Tooth carrier assembly, 2a. Sealing mating section, 3. Seal positioning bracket, 3a. Positioning bracket body, 3b. Through groove, 3c. Seal slot, 3d. Extension, 4. Seal, 5. Fixing screw. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0022] like Figures 1 to 5 As shown, a sewing machine feeder sealing and dustproof structure includes a machine body 1 and a feeder assembly 2. The machine body 1 is provided with a feeder slide 1a, and the feeder assembly 2 is disposed in the feeder slide 1a. The feeder assembly 2 is provided with a sealing mating section 2a. A sealing element positioning frame 3 is connected in the feeder slide 1a, and a sealing element 4 is provided on the sealing element positioning frame 3. The sealing element 4 and the sealing mating section 2a on the feeder assembly 2 are sealed together.

[0023] In this invention, the function of the sealing element positioning bracket 3 is to constrain and fix the sealing element 4, ensuring that the sealing element 4 remains stable in its current installation position and preventing displacement. By setting the sealing element positioning bracket 3 and the sealing element 4 in the tooth holder slide 1a, the sealing fit between the sealing element 4 and the tooth holder assembly 2 prevents external dust, particles, etc., from entering the gap between the tooth holder assembly and the machine body 1, thereby ensuring smooth sliding of the tooth holder assembly 2, reducing wear on the tooth holder assembly 2, and improving the accuracy of the tooth holder assembly 2. Furthermore, to ensure lubrication during the sliding of the tooth holder assembly 2, the operator adds lubricating oil between the tooth holder assembly 2 and the machine body 1. The setting of the sealing element 4 can greatly reduce the rate of lubricating oil loss and increase the retention time of lubricating oil between the tooth holder assembly 2 and the machine body 1, thus allowing the tooth holder assembly 2 to receive high-quality lubrication for a longer period of time and reducing the frequency of lubricating oil addition.

[0024] The sealing element positioning frame 3 includes a positioning frame body 3a, on which a through groove 3b and a sealing element slot 3c are provided, and the sealing element 4 is installed in the sealing element slot 3c; the sealing element 4 is annular, and the toothed bracket assembly 2 passes through the sealing element 4.

[0025] The seal 4 matches the cross-section of the sealing mating section 2a on the dental arch assembly 2. In this embodiment, the cross-section of the sealing mating section 2a on the dental arch assembly 2 is rectangular, and the cross-section of the hollow area at the center of the seal 4 is also rectangular. The inner side of the seal 4 is tightly fitted to the surface of the sealing mating section 2a.

[0026] One end of the sealing slot 3c is an open end, and the sealing element 4 is inserted into the opening end of the sealing slot 3c. The sealing element 4 is installed in the sealing slot 3c in a plug-in form, which greatly facilitates the installation and replacement of the sealing element 4; when replacing it, only the sealing element 4 needs to be replaced, without replacing the sealing element positioning bracket 3 body.

[0027] The positioning frame body 3a is provided with an extension 3d, which is connected to the machine body 1 by a fixing screw 5. The bottom of the groove 1c is provided with a threaded hole 1d, and the extension 3d is provided with a screw through hole. The fixing screw 5 passes through the screw through hole on the extension 3d and is connected to the threaded hole 1d.

[0028] Positioning slots 1b are provided on both sides of the tooth holder slide 1a, and the two sides of the positioning frame body 3a are inserted into the positioning slots 1b; a groove 1c is provided on the body 1, and the extension 3d is embedded in the groove 1c. When the sealing element positioning frame 3 is installed, the sealing element positioning frame 3 cooperates with the groove 1c, and the groove 1c is used to position the sealing element positioning frame 3.

[0029] In this embodiment, the seal 4 is made of nitrile rubber. Nitrile rubber has good wear resistance, chemical corrosion resistance, heat resistance, and physical and mechanical properties.

[0030] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A sealing and dustproof structure for a sewing machine feeder, characterized in that, The device includes a body and a tooth frame assembly. The body is provided with a tooth frame slide, and the tooth frame assembly is located in the tooth frame slide. The tooth frame assembly is provided with a sealing mating section. A sealing element positioning frame is connected in the tooth frame slide, and a sealing element is provided on the sealing element positioning frame. The sealing element and the sealing mating section on the tooth frame assembly are sealed together.

2. The sealing and dustproof structure for a sewing machine feeder according to claim 1, characterized in that, The sealing element positioning frame includes a positioning frame body, on which a through groove and a sealing element slot are provided, and the sealing element is installed in the sealing element slot; the sealing element is annular, and the toothed bracket assembly passes through the sealing element.

3. The sealing and dustproof structure for a sewing machine feeder according to claim 2, characterized in that, The positioning frame body is provided with an extension, which is connected to the machine body by fixing screws.

4. The sealing and dustproof structure for a sewing machine feeder according to claim 3, characterized in that, The tooth frame slide is provided with positioning slots on both sides, and the two sides of the positioning frame body are inserted into the positioning slots; the machine body is provided with grooves, and the extension is embedded in the grooves.

5. The sealing and dustproof structure for a sewing machine feeder according to claim 4, characterized in that, The bottom of the groove is provided with a threaded hole, and the extension is provided with a screw through hole. The fixing screw passes through the screw through hole on the extension and is connected to the threaded hole.

6. The sealing and dustproof structure for a sewing machine feeder according to claim 2, characterized in that, One end of the sealing slot is an open end, and the sealing element is inserted into the opening end of the sealing slot.

7. The sealing and dustproof structure for a sewing machine feeder according to claim 1, characterized in that, The seal is made of nitrile rubber.

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