Feeding rack for sewing machine

Abstract

The utility model relates to the technical field of feeding tooth frame, and disclose a sewing machine feeding tooth frame, including the tooth frame, the outside of tooth frame is equipped with the sliding rod, the outside coaxial of sliding rod is equipped with the outer slide bushing, two encapsulation boards, symmetrical setting are in the both ends of outer slide bushing, be equipped with the lubricating assembly that can prevent oil liquid from the edge of outer slide bushing leaks in the sewing machine working process between encapsulation board, the docking assembly is set up in the outside of encapsulation board, the utility model discloses through docking assembly can combine docking flange, first annular seat, and then can realize the convenient assembly between encapsulation board and outer slide bushing, through lubricating assembly one side can provide sufficient lubrication for sliding rod, on the other hand cooperation first sealing washer, second sealing washer can effectively prevent lubricating oil liquid from the edge of outer slide bushing leaks, to this avoid lubricating oil liquid to pollute cloth, be favorable to the normal operation of sewing machine.

Description

Technical Field

[0001] This utility model relates to the field of feed dog technology, specifically a feed dog for a sewing machine. Background Technology

[0002] A sewing machine is a device used to create stitches on sewing materials. It interweaves or sews together one or more layers of fabric using one or more sewing threads. Key components of a sewing machine include the head, needle bar, thread roller, and feed dog. Among these, the feed dog is a very important component of the sewing machine. By cooperating with the feed dog, it allows the fabric to move along a preset path, thereby ensuring the quality and efficiency of the sewing.

[0003] When using existing sewing machine feed dogs, the slide bar on the feed dog moves back and forth at high speed within the slide sleeve as the sewing machine operates. To ensure that the feed dog remains stable and smooth during displacement, the operator injects lubricating oil into the slide sleeve to ensure sufficient lubrication for the slide bar. However, since most feed dog slide sleeves lack a structure to prevent oil leakage, lubricating oil can easily leak from the edge of the slide sleeve. The leaked oil may contaminate the fabric, which is detrimental to the normal use of the sewing machine. Utility Model Content

[0004] The purpose of this utility model is to provide a sewing machine feed dog to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sewing machine feed dog, comprising:

[0006] A dental frame, wherein a sliding rod is provided on the outer side of the dental frame, and an outer sliding sleeve is coaxially provided on the outer side of the sliding rod;

[0007] Two encapsulation plates are symmetrically arranged at both ends of the outer sleeve, and a lubrication component is provided between the encapsulation plates to prevent oil from leaking out from the edge of the outer sleeve during the operation of the sewing machine;

[0008] The docking components are located on the outside of the encapsulation plate, and a second annular seat is fixedly connected to the side of each of the two docking components that are close to each other.

[0009] Preferably, the lubrication assembly includes an inner sleeve disposed inside the outer sleeve, with lubricating cotton provided between the inner sleeve and the outer sleeve. The inner sleeve has multiple symmetrically arranged limiting grooves inside, and each limiting groove is movably connected to a ball bearing, which contacts the lubricating cotton and the sliding rod respectively.

[0010] Preferably, an oil inlet is provided on one side of the outer sliding sleeve, and a sealing plug is installed inside the oil inlet.

[0011] Preferably, a first sealing ring is provided between the second annular seat and the outer sliding sleeve, and a second sealing ring is provided between the second annular seat and the sliding rod. Annular grooves are provided on the inner wall of the first sealing ring and the outer wall of the second sealing ring. An annular protrusion corresponding to the annular groove is provided on the outer side of the second annular seat, and the annular protrusion is located inside the annular groove.

[0012] Preferably, the docking assembly includes a docking flange fixed to the outside of the encapsulation plate, and a first annular seat is fixedly connected to both ends of the outer sleeve. A positioning bolt corresponding to the docking flange is provided on one side of the first annular seat. One end of the positioning bolt is connected to the first annular seat, and the other end of the positioning bolt extends through to the outside of the docking flange and is screwed with a fastening nut.

[0013] Preferably, both sides of the outer sliding sleeve are vertically mounted with limiting seats, and the limiting seats have at least two mounting holes inside.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention allows for the assembly of the docking flange and the first annular seat via a docking component, thereby enabling convenient assembly between the encapsulation plate and the outer sliding sleeve. The lubrication component provides sufficient lubrication for the sliding rod and, in conjunction with the first and second sealing rings, effectively prevents lubricating oil from leaking out from the edge of the outer sliding sleeve, thus avoiding lubricating oil contamination of the fabric and facilitating the normal operation of the sewing machine. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of the sewing machine feed dog provided by this utility model;

[0017] Figure 2 A schematic diagram of the specific structure of the outer sliding sleeve provided by this utility model;

[0018] Figure 3 A schematic diagram of the docking component structure provided by this utility model;

[0019] Figure 4 A schematic diagram of the lubrication assembly structure provided by this utility model;

[0020] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle;

[0021] Figure 6 This is a schematic diagram of the specific structure of the inner sliding sleeve provided by this utility model.

[0022] In the diagram: 1. Tooth frame; 2. Sliding rod; 3. Outer sliding sleeve; 4. Encapsulation plate; 5. Docking assembly; 51. First annular seat; 52. Docking flange; 53. Positioning bolt; 54. Fastening nut; 6. Lubrication assembly; 61. Inner sliding sleeve; 62. Limiting groove; 63. Ball bearing; 64. Lubricating cotton; 7. Oil inlet; 8. Sealing plug; 9. Second annular seat; 10. First sealing ring; 11. Second sealing ring; 12. Annular protrusion; 13. Annular groove; 14. Limiting seat; 15. Mounting hole. Detailed Implementation

[0023] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-6 As shown, a sewing machine feed dog includes a feed dog 1, a sliding rod 2 on the outer side of the feed dog 1, and an outer sliding sleeve 3 coaxially on the outer side of the sliding rod 2; two sealing plates 4 are symmetrically arranged at both ends of the outer sliding sleeve 3, and a lubrication component 6 is provided between the sealing plates 4 to prevent oil leakage from the edge of the outer sliding sleeve 3 during the operation of the sewing machine. By setting the lubrication component 6, on the one hand, sufficient lubrication can be provided for the sliding rod 2 on the outer side of the feed dog 1 when it makes reciprocating high-speed movement in the outer sliding sleeve 3, and on the other hand, it can effectively prevent lubricating oil from leaking from the edge of the outer sliding sleeve 3, thereby avoiding lubricating oil contamination of the fabric and facilitating the normal operation of the sewing machine; a docking component 5 is arranged on the outer side of the sealing plates 4, and the sealing plates 4 and the outer sliding sleeve 3 can be conveniently assembled by setting the docking component 5; a second annular seat 9 is fixedly connected to the side of the two docking components 5 that are close to each other. By setting the second annular seat 9, the lubrication component 6 can be positioned and fixed from both ends of the outer sliding sleeve 3, thereby preventing the reciprocating high-speed movement of the sliding rod 2 from being affected by the displacement of the lubrication component 6, which is beneficial to improving the working stability of the feed dog 1.

[0025] Lubrication assembly 6 includes an inner sleeve 61 disposed inside the outer sleeve 3. Lubricating cotton 64 is provided between the inner sleeve 61 and the outer sleeve 3. Multiple limiting grooves 62 are symmetrically formed inside the inner sleeve 61. Each limiting groove 62 has a ball bearing 63 movably connected inside it. The ball bearing 63 contacts the lubricating cotton 64 and the sliding rod 2 respectively. Figure 1 , Figure 3 and Figure 4As shown, when the outer sliding rod 2 of the gear frame 1 reciprocates at high speed within the outer sliding sleeve 3, on the one hand, the lubricating cotton 64 mixes and coats the stored oil on the outer surface of the ball 63, thereby ensuring smooth and stable engagement between the ball 63 and the sliding rod 2 within the multiple sets of limiting grooves 62. On the other hand, compared with the common gear frame 1, the lubricating cotton 64 can block the lubricating oil, preventing excessive oil from leaking out of the limiting groove 62 at the same time, and thus preventing the lubricating oil from leaking out from the edge of the outer sliding sleeve 3, thereby preventing the lubricating oil from contaminating the fabric.

[0026] An oil inlet 7 is provided on one side of the outer sliding sleeve 3, and a sealing plug 8 is installed inside the oil inlet 7, such as... Figure 3 , Figure 4 As shown, the outer sliding sleeve 3 and the inner sliding sleeve 61 form a cavity for storing lubricating oil. When the lubricating cotton 64 gradually dries out due to lack of oil, the operator can replenish the lubricating cotton 64 with oil through the oil filling port 7. After the oil is replenished, the sealing plug 8 can be used to prevent the oil from leaking out.

[0027] A first sealing ring 10 is provided between the second annular seat 9 and the outer sliding sleeve 3, and a second sealing ring 11 is provided between the second annular seat 9 and the sliding rod 2. Annular grooves 13 are provided on the inner wall of the first sealing ring 10 and the outer wall of the second sealing ring 11. An annular protrusion 12 corresponding to the annular groove 13 is provided on the outer side of the second annular seat 9. The annular protrusion 12 is located inside the annular groove 13. Figure 4 , Figure 5 As shown, by setting the annular groove 13 and the annular protrusion 12, the first sealing ring 10, the second sealing ring 11 and the second annular seat 9 can be easily assembled. The first sealing ring 10 can seal the gap between the second annular seat 9 and the outer sliding sleeve 3, and the second sealing ring 11 can seal the gap between the second annular seat 9 and the sliding rod 2, thereby achieving effective sealing at both ends of the outer sliding sleeve 3, thus further improving the sealing performance.

[0028] The docking assembly 5 includes a docking flange 52 fixed to the outside of the encapsulation plate 4. First annular seats 51 are fixedly connected to the outer sides of both ends of the outer sliding sleeve 3. A positioning bolt 53 corresponding to the docking flange 52 is provided on one side of the first annular seat 51. One end of the positioning bolt 53 is connected to the first annular seat 51, and the other end of the positioning bolt 53 extends through to the outside of the docking flange 52 and is screwed with a fastening nut 54. Figure 2 , Figure 3 As shown, the mating flange 52 and the first annular seat 51 can be combined by the positioning bolt 53 and the fastening nut 54, thereby realizing convenient assembly between the encapsulation plate 4 and the outer sliding sleeve 3.

[0029] Both sides of the outer sliding sleeve 3 are vertically mounted with limit seats 14, and the limit seats 14 have not less than two mounting holes 15 inside, such as... Figure 1 , Figure 3 As shown, by using the mounting holes 15 on the limiting seat 14 and fasteners such as bolts, the outer sliding sleeve 3 can be easily assembled with the sewing machine components.

[0030] Working principle: First, the operator installs the sewing machine feed dog at the reserved position. The docking assembly 5 can be used to combine the docking flange 52 and the first annular seat 51, thereby realizing convenient assembly between the encapsulation plate 4 and the outer sliding sleeve 3. When the sliding rod 2 on the outside of the dog 1 moves back and forth at high speed in the outer sliding sleeve 3, the lubrication assembly 6 can provide sufficient lubrication for the sliding rod 2. On the other hand, in conjunction with the first sealing ring 10 and the second sealing ring 11, it can effectively prevent the lubricating oil from leaking out from the edge of the outer sliding sleeve 3, thereby avoiding the lubricating oil from contaminating the fabric and facilitating the normal operation of the sewing machine.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feed dog for a sewing machine, characterized in that, include: Dental frame (1), a sliding rod (2) is provided on the outside of the dental frame (1), and an outer sliding sleeve (3) is coaxially provided on the outside of the sliding rod (2); Two encapsulation plates (4) are symmetrically arranged at both ends of the outer sliding sleeve (3), and a lubrication component (6) is provided between the encapsulation plates (4) to prevent oil from leaking from the edge of the outer sliding sleeve (3) during the operation of the sewing machine; The docking components (5) are disposed on the outside of the encapsulation plate (4), and the two docking components (5) are fixedly connected to the side of each other with a second annular seat (9).

2. The sewing machine feed dog as described in claim 1, characterized in that: The lubrication assembly (6) includes an inner sleeve (61) disposed inside the outer sleeve (3). Lubricating cotton (64) is provided between the inner sleeve (61) and the outer sleeve (3). Multiple limiting grooves (62) are symmetrically opened inside the inner sleeve (61). A ball (63) is movably connected inside each limiting groove (62). The ball (63) is in contact with the lubricating cotton (64) and the sliding rod (2) respectively.

3. A sewing machine feed dog as described in claim 2, characterized in that: The outer sleeve (3) is provided with an oil inlet (7) on one side, and a sealing plug (8) is installed inside the oil inlet (7).

4. A sewing machine feed dog according to claim 2, characterized in that: A first sealing ring (10) is provided between the second annular seat (9) and the outer sliding sleeve (3), and a second sealing ring (11) is provided between the second annular seat (9) and the sliding rod (2). Annular grooves (13) are provided on the inner wall of the first sealing ring (10) and the outer wall of the second sealing ring (11). Annular protrusions (12) corresponding to the annular grooves (13) are provided on the outer side of the second annular seat (9). The annular protrusions (12) are located inside the annular grooves (13).

5. A sewing machine feed dog as described in claim 1, characterized in that: The docking assembly (5) includes a docking flange (52) fixed to the outside of the encapsulation plate (4). Both ends of the outer sleeve (3) are fixedly connected to a first annular seat (51). One side of the first annular seat (51) is provided with a positioning bolt (53) corresponding to the docking flange (52). One end of the positioning bolt (53) is connected to the first annular seat (51), and the other end of the positioning bolt (53) extends through to the outside of the docking flange (52) and is screwed with a fastening nut (54).

6. A sewing machine feed dog as described in claim 1, characterized in that: Both sides of the outer sliding sleeve (3) are vertically mounted with limiting seats (14), and the limiting seats (14) have at least two mounting holes (15) inside.

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