A sewing machine

Abstract

The utility model provides a sewing machine belongs to sewing machine manufacturing technical field, it has solved current how makes the problem that the shell outside and inside of sewing machine are not easy to be polluted by oil. The sewing machine includes casing, upper cover and the oil supply structure between both, the top surface of casing is provided with the recess that is strip and recessed and sunken, the upper cover includes the oil cover and the maintenance cover that set up separately, the oil cover is located above the oil supply structure, the oil cover and maintenance cover abut in recess, the junction of oil cover and maintenance cover is equipped with the sealing washer between the bottom surface of recess, the front and back side of sealing washer all abut with the groove wall of recess, the bottom surface of sealing washer abuts with recess, the top surface of sealing washer abuts with oil cover and / or maintenance cover. The sewing machine has the advantage that the shell outside and inside are not easy to be polluted by oil.

Description

Technical Field

[0001] This utility model belongs to the field of sewing machine manufacturing technology and relates to a sewing machine. Background Technology

[0002] A sewing machine is a machine that uses one or more sewing threads to create one or more stitches on fabric, allowing one or more layers of fabric to interweave or sew together. The sewing machine housing contains various transmission parts, and lubricating oil is needed during sewing operations to ensure the smooth movement of these parts and to extend their lifespan.

[0003] Therefore, existing sewing machines generally incorporate an oil supply structure on the upper part of the machine casing. For example, Chinese patent document CN218436178U discloses a multi-needle sewing machine, which includes a machine casing and a base. The base has an oil tank containing an oil pump. An oil receiving tray with several drip holes is located at the top of the inner cavity of the machine casing. An oil mirror made of transparent material is also present on the machine casing, featuring an open-bottomed oil receiving cavity located above the oil receiving tray. The oil pump is connected to the oil receiving tray via an oil guide pipe, with the oil outlet of the guide pipe facing the oil receiving cavity. The machine casing includes an integrally formed tailstock, a cantilever beam, and a headstock. Partition walls are provided between the cantilever beam, tailstock, and headstock. The oil receiving tray and oil holes are located within the cantilever beam. A detachable upper cover is detachably mounted on the top of both the cantilever beam and tailstock, and a sealing gasket is placed between the top of the tailstock and cantilever beam and the upper cover. The sewing machine adopts the above-mentioned oil supply mechanism and the structural design of the machine casing, which has the advantage of making it more intuitive and convenient for the operator to observe the oil supply status of the oil supply mechanism.

[0004] However, the above-mentioned sewing machine also has the following defects: In the above-mentioned sewing machine, a notch is opened at the top of the machine housing, and the upper cover plate covers the notch. This results in the front and rear sides of the sealing fit between the two being located on the side of the housing. When the oil generated by the rotation of the internal parts of the machine housing splashes into the front and rear sides, once the oil seeps out from the front and rear sides, it will flow down along the side of the machine housing, thereby causing contamination of the exterior of the housing and the parts on it. At the same time, the upper cover plate extends almost the entire housing from left to right. During the daily operation or disassembly of the upper cover plate, oil will slide along the inner surface of the upper cover plate, thereby causing contamination of the non-lubricated parts inside the housing, affecting subsequent inspection and maintenance. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a sewing machine. The technical problem to be solved by this invention is how to make the exterior and interior of the sewing machine casing less susceptible to oil contamination.

[0006] The objective of this utility model can be achieved through the following technical solution: A sewing machine, comprising a housing, a top cover plate, and an oil supply structure located between the two, characterized in that a strip-shaped and recessed groove is provided on the top surface of the housing, the top cover plate comprises a separately disposed oil cap and a maintenance cap, the oil cap being located above the oil supply structure, the oil cap and the maintenance cap being adjacently embedded in the groove, a sealing gasket being provided between the junction of the oil cap and the maintenance cap and the bottom surface of the groove, the front and rear sides of the sealing gasket abutting against the groove wall, the lower surface of the sealing gasket abutting against the bottom surface of the groove, and the upper surface of the sealing gasket abutting against the oil cap and / or the maintenance cap.

[0007] Unlike existing sewing machine designs that feature a recessed opening at the top of the casing, this invention utilizes a strip-shaped, recessed groove on the top surface of the casing. The groove's edges are all located on the top surface, and the upper cover is embedded within this groove. This design creates a clearance between the two components on the top surface of the casing, rather than the side. Therefore, even if oil seeps through this clearance, it won't easily flow directly down the side of the casing, preventing oil contamination of the casing's exterior and components. Furthermore, the upper cover is designed as a separate unit, comprising an oil cover and a maintenance cover, both embedded adjacent to each other within the groove. A space is provided between the junction of these two components and the bottom surface of the groove. The sealing gasket has its front and rear sides abutting against the groove wall, its lower surface abutting against the bottom of the groove, and its upper surface abutting against the oil cap and / or inspection cover. This design separates the oil cap and inspection cover. Because the oil cap is located above the oil supply structure, it is more susceptible to oil splashing. During normal use, the sealing gasket prevents oil splashed onto the oil cap from flowing down the lower surface of the oil cap to the inspection cover. When the oil cap needs to be removed for maintenance, its separate design prevents oil from flowing onto the inspection cover. This also minimizes the risk of contamination of the inspection cover and the non-lubricated parts inside the casing below it. Therefore, the recessed groove and separate top cover design effectively prevent oil contamination of both the exterior and interior of the casing.

[0008] In the aforementioned sewing machine, the bottom surface of the groove has a first window, a second window, and a partition between the first and second windows. The oil cap is located above the first window, the inspection cover is located above the second window, and the partition is located below the junction of the oil cap and the inspection cover. The sealing gasket includes a first sealing gasket and a second sealing gasket, which may be separate or integrally formed. The first sealing gasket is sealed between the perimeter of the oil cap and the bottom surface of the groove, with a portion of the first sealing gasket located on the partition. The second sealing gasket is sealed between the perimeter of the inspection cover and the bottom surface of the groove, with a portion of the second sealing gasket located on the partition. Through this design, on the one hand, the design of the first and second sealing gaskets can improve the sealing performance of the oil cap and the inspection cover, thereby preventing oil leakage and causing external contamination of the machine casing; on the other hand, since both the first and second sealing gaskets are partially located on the partition, it makes it less likely for oil to flow from the lower surface of the oil cap to the inspection cover and contaminate the non-lubricated area below the inspection cover.

[0009] In the sewing machine described above, the oil cap is rectangular, and the sealing gasket is shaped to follow the shape of the oil cap, with the sealing gasket being U-shaped. This design of the oil cap and sealing gasket improves the sealing effect when the oil cap mates with the groove in the housing, thus preventing oil leakage from the gap between the two and avoiding external contamination of the machine casing.

[0010] In the sewing machine described above, the top surface of the housing is a horizontally oriented plane, and the grooves are rectangular and arranged along the length of the housing. This design prevents slight oil seepage from the edges of the grooves, as the top surface is horizontal, preventing it from flowing onto the lower surface of the housing. It can simply be wiped away, thus minimizing oil contamination on the exterior of the housing.

[0011] In the aforementioned sewing machine, the groove wall has a ring-shaped step, the sealing gasket is located below the step, and the oil cap has a protruding edge that matches the step, the protruding edge abutting against the step. This design of the step and protruding edge increases the sealing path between the oil cap and the groove, thereby improving the sealing effect and preventing oil leakage from the gap between the two, thus reducing the risk of external contamination of the machine casing.

[0012] In the sewing machine described above, the oil supply structure is either an oil box or an oil spray pipe. The oil supply structure is used for oil output, allowing the oil to flow to the parts inside the machine housing that require lubrication.

[0013] Compared with existing technologies, this sewing machine has the following advantages: By designing a groove structure on the top surface of the housing, designing a split upper cover, and matching a sealing gasket, this sewing machine makes it difficult for the oil inside the housing to seep out to the outside of the housing and cause external contamination, and also makes it difficult for the oil to flow into the non-lubricated areas inside the housing and cause internal contamination. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the sewing machine casing.

[0015] Figure 2 This is an exploded structural diagram of the sewing machine casing.

[0016] Figure 3 This is a structural diagram of the sewing machine housing after the top cover is hidden.

[0017] Figure 4 This is a schematic diagram of a partial cross-sectional structure of the sewing machine casing cut horizontally.

[0018] In the diagram, 1. Shell; 11. Groove; 111. Step; 12. Window 1; 13. Window 2; 14. Divider; 2. Top cover; 21. Oil cap; 211. Protruding edge; 22. Inspection cover; 3. Oil supply structure; 4. Sealing gasket; 5. Sealing gasket 1; 6. Sealing gasket 2; 7. Oil sight glass. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] Specifically, such as Figure 1 and Figure 2 As shown, this sewing machine includes a housing 1, an upper cover plate 2, and an oil supply structure 3 located between the two. The oil supply structure 3 is an oil box or an oil spray pipe, or other existing structures in the art; in this embodiment, it is an oil box. The top surface of the housing 1 is a horizontally arranged plane. A rectangular, recessed groove 11 is formed on the top surface of the housing 1, arranged along the length of the housing 1, with the edges of the groove openings all located on the top surface. The upper cover plate 2 includes a separate, rectangular oil cap 21 and an inspection cover 22. The oil cap 21 is equipped with an oil sight glass and is located above the oil box. The oil cap 21 and the inspection cover 22 are adjacently embedded in the groove 11. A sealing gasket 4 is provided between the junction of the oil cap 21 and the inspection cover 22 and the bottom surface of the groove 11. Figure 3 and Figure 4 As shown, the front and rear sides of the sealing gasket 4 abut against the groove wall of the groove 11, the lower surface of the sealing gasket 4 abuts against the bottom surface of the groove 11, and the upper surface of the sealing gasket 4 abuts against the oil cap 21 and / or the inspection cap 22.

[0021] More specifically, for example Figure 2 and Figure 3As shown, the bottom surface of the groove 11 has a window 12, a window 23, and a partition 14 located between the window 12 and the window 23. The oil cap 21 is located above the window 12, the inspection cap 22 is located above the window 23, and the partition 14 is located below the junction of the oil cap 21 and the inspection cap 22. The sealing gasket 4 includes a sealing gasket 5 and a sealing gasket 6, which are either separate or integrally formed. The sealing gasket 5 is sealed between the periphery of the oil cap 21 and the bottom surface of the groove 11. The sealing gasket 5 is conformally arranged to the shape of the oil cap 21 and is U-shaped. Part of the sealing gasket 5 is located on the partition 14. The sealing gasket 6 is sealed between the periphery of the inspection cap 22 and the bottom surface of the groove 11, and part of the sealing gasket 6 is located on the partition 14. For example... Figure 4 As shown, the groove wall of the groove 11 has a ring-shaped step 111, the sealing gasket 4 is located below the step 111, and the oil cap 21 has a protruding edge 211 that matches the step 111, the protruding edge 211 abuts against the step 111.

[0022] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0023] Although this document frequently uses terms such as shell 1, groove 11, step 111, window one 12, window two 13, partition 14, upper cover 2, oil cap 21, raised edge 211, inspection cover 22, oil supply structure 3, sealing gasket 4, sealing gasket one 5, and sealing gasket two 6, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. A sewing machine comprising a housing (1), a top cover (2), and an oil supply structure (3) located between the two, characterized in that, A strip-shaped recessed groove (11) is opened on the top surface of the housing (1), the upper cover plate (2) includes an oil cover (21) and an access cover (22) which are separately arranged, the oil cover (21) is located above the oil supply structure (3), the oil cover (21) and the access cover (22) are adjacently embedded in the groove (11), a sealing gasket (4) is arranged between the junction of the oil cover (21) and the access cover (22) and the bottom surface of the groove (11), both the front and rear side surfaces of the sealing gasket (4) abut against the groove wall of the groove (11), the lower surface of the sealing gasket (4) abuts against the bottom surface of the groove (11), and the upper surface of the sealing gasket (4) abuts against the oil cover (21) and / or the access cover (22).

2. The sewing machine according to claim 1, characterized in that, The bottom surface of the groove (11) is provided with a first window (12), a second window (13), and a partition part (14) located between the first window (12) and the second window (13), the oil cover (21) is located above the first window (12), the access cover (22) is located above the second window (13), the partition part (14) is located below the junction of the oil cover (21) and the access cover (22), the sealing gasket (4) includes a first sealing gasket (5) and a second sealing gasket (6) which are arranged separately or integrally, the first sealing gasket (5) is arranged in a sealed manner between the peripheral edge of the oil cover (21) and the bottom surface of the groove (11), part of the first sealing gasket (5) is located on the partition part (14), the second sealing gasket (6) is arranged in a sealed manner between the peripheral edge of the access cover (22) and the bottom surface of the groove (11), and part of the second sealing gasket (6) is located on the partition part (14).

3. The sewing machine according to claim 2, characterized in that, The oil cover (21) is rectangular, the first sealing gasket (5) is arranged to follow the shape of the oil cover (21), and the first sealing gasket (5) is in a loop shape.

4. The sewing machine according to claim 1, 2, or 3, characterized in that, The top surface of the housing (1) is a horizontally arranged flat surface, and the groove (11) is rectangular and arranged along the length direction of the housing (1).

5. The sewing machine according to claim 1, 2, or 3, characterized in that, A circle of annular step (111) is provided on the groove wall of the groove (11), the sealing gasket (4) is located below the step (111), the oil cover (21) is provided with a convex edge (211) adapted to the step (111), and the convex edge (211) abuts against the step (111).

6. The sewing machine according to claim 1, 2, or 3, characterized in that, The oil supply structure (3) is an oil box or an oil spray pipe.

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