A sewing machine

Abstract

A sewing machine is provided with a head and a base, the head is provided with an upper shaft, the base is provided with a lower shaft, the upper shaft and the lower shaft are drivingly connected through a connecting rod mechanism; the head is provided with an upper oil tank, the base is provided with a lower oil tank; the upper oil tank is provided with an upper communication port at the bottom, the lower oil tank is provided with a lower communication port at the top, the upper communication port is above the lower communication port and communicates with the lower communication port; the upper driving shaft end of the upper shaft is in the upper oil tank, the lower driving shaft end of the lower shaft is in the lower oil tank; the upper part of the connecting rod mechanism is drivingly connected with the upper driving shaft end in the upper oil tank, the lower part of the connecting rod mechanism is drivingly connected with the lower driving shaft end in the lower oil tank; the connecting rod provided in the connecting rod mechanism passes through the upper communication port and the lower communication port from the upper oil tank to the lower oil tank. Reduce noise, reduce vibration, so that it can run at a higher speed, and it does not need to be refueled frequently.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to an improved structure for the sewing machine head and tailstock. Background Technology

[0002] A sewing machine is a tool that sews fabric together mechanically or electrically. Its core principle is the coordinated work of a needle and thread system and a fabric feeding system to create a strong stitch. In existing sewing machines, because the transmission system involves components of both the head and tailstock, perforated structures are needed at corresponding locations in the head and tailstock (or base) for micro-oil lubrication of traditional system components. Under normal circumstances, this lubrication structure is effective; however, at higher operating speeds, especially during prolonged high-speed operation, frequent lubrication is required to maintain lubrication. Otherwise, operating noise and vibration will increase significantly. Although the sewing machine head and base may have an outer shell, this does not help to prevent noise and vibration. Utility Model Content

[0003] In view of the above, in order to solve the problems existing in the above technology, this utility model proposes a sewing machine, which is provided with a machine head and a base. The machine head is provided with an upper shaft and the base is provided with a lower shaft. The upper shaft and the lower shaft are connected by a linkage mechanism. The machine head is provided with an upper oil chamber and the base is provided with a lower oil chamber. The bottom of the upper oil chamber is provided with an upper connecting port and the top of the lower oil chamber is provided with a lower connecting port. The upper connecting port is located above the lower connecting port and communicates with the lower connecting port. The upper drive shaft end of the upper shaft is located in the upper oil chamber and the lower drive shaft end of the lower shaft is located in the lower oil chamber. The upper part of the linkage mechanism is connected to the upper drive shaft end in the upper oil chamber and the lower part of the linkage mechanism is connected to the lower drive shaft end in the lower oil chamber. The connecting rod provided in the linkage mechanism passes through the upper connecting port and the lower connecting port from the upper oil chamber to the lower oil chamber.

[0004] According to the present application, in a sewing machine, the two ends of the upper drive shaft of the upper shaft are respectively mounted on the side wall of the upper oil tank in the machine head through oil seals, which can rotate relative to each other.

[0005] According to the present application, a sewing machine has an upper shaft bearing for supporting the upper shaft on the outer side wall of the upper oil tank in the machine head.

[0006] According to the present application, in a sewing machine, the two ends of the lower drive shaft of the lower shaft are respectively rotatably mounted on the side wall of the lower oil tank in the base through copper sleeves.

[0007] According to the present application, a sewing machine includes a linkage mechanism comprising a connecting rod, a swing tooth, and a lower shaft gear. The top end of the connecting rod is connected to the upper drive shaft end, the bottom end of the connecting rod is connected to the swing tooth, the swing tooth is connected to the lower shaft gear, and the lower shaft gear is disposed on the lower drive shaft end.

[0008] According to a sewing machine of this application, the top of the upper oil tank has an opening, and a transparent sealing upper plate is provided at the opening. The sealing upper plate has an air vent, and an air vent plug is provided in the air vent. The bottom of the lower oil tank has an opening, and a sealing lower plate is provided at the opening.

[0009] According to the present application, a sewing machine has a sealing gasket between the bottom of the machine head and the top of the base, and the sealing gasket is provided at least around the upper and lower connecting ports.

[0010] After adopting the technology proposed in this utility model, the sewing machine according to the embodiment of this utility model has the following beneficial effects: the sealed oil tank can reduce noise and vibration, thereby enabling higher speed operation without frequent oiling; after long-term high-speed operation, the lower shaft is not easy to jam, and the speed can be increased from medium-low speed of 2,000 rpm to support long-term high-speed operation of 3,000 rpm. Attached Figure Description

[0011] Figure 1 A structural diagram of a sewing machine according to this application; Figure 2 This is a cross-sectional view of the sewing machine according to this application along the axial direction of the upper and lower shafts; Figure 3 To and Figure 2 Vertical sectional view of the structure; Figure 4 This is a structural diagram of the transmission system components in a sewing machine according to this application.

[0012] In the picture, Nose 1 Upper oil tank 10 Upward connection port 101 Upper axis 11 Upper drive shaft end 111 Sealing upper plate 12 Vent plug 13 Base 2 Lower oil tank 20 Downstream connection port 201 Lower shaft 21 Lower drive shaft end 211 Sealing lower plate 22 Linkage Mechanism 3 Link 31 32 oscillating teeth Lower shaft gear 33 Oil seal 4 Upper shaft bearing 41 Copper sleeve 5 Detailed Implementation

[0013] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. The following description, with reference to the accompanying drawings, is provided to aid in understanding exemplary embodiments of the present invention as defined by the claims and their equivalents. It includes various specific details to aid understanding, but these are to be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Furthermore, detailed descriptions of functions and structures well known in the art will be omitted to make the specification clearer and more concise.

[0014] like Figure 1-4 As shown, a sewing machine includes a head 1 and a base 2. The head 1 has an upper shaft 11, and the base 2 has a lower shaft 21. The upper shaft 11 and the lower shaft 21 are connected by a linkage mechanism 3. The head 1 has an upper oil chamber 10, and the base 2 has a lower oil chamber 20. The upper oil chamber 10 has an upper connecting port 101 at its bottom, and the lower oil chamber 20 has a lower connecting port 201 at its top. The upper connecting port 101 is located above and communicates with the lower connecting port 201. The upper drive shaft end 111 of the upper shaft 11 is located in the upper oil tank 10, and the lower drive shaft end 211 of the lower shaft 21 is located in the lower oil tank 20; the upper part of the linkage mechanism 3 is connected to the upper drive shaft end 111 in the upper oil tank 10, and the lower part of the linkage mechanism 3 is connected to the lower drive shaft end 211 in the lower oil tank 20; the connecting rod 31 provided in the linkage mechanism 3 passes through the upper connecting port 101 and the lower connecting port 201 from the upper oil tank 10 to the lower oil tank 20.

[0015] The upper drive shaft end 111 of the upper shaft 11 is rotatably mounted on the side wall of the upper oil tank 10 in the head 1 via oil seals 4. The remaining part of the upper shaft 11 passes through the side wall of the upper oil tank 10 to other parts of the head 1 and connects with other working components.

[0016] The engine head 1 has an upper shaft bearing 41 for supporting the upper shaft 11 on the outer side wall of the upper oil tank 10.

[0017] The two ends of the lower drive shaft 211 of the lower shaft 21 are respectively rotatably mounted on the side wall of the lower oil tank 20 in the base 2 via copper sleeves 5. The remaining part of the lower shaft 21 passes through the side wall of the lower oil tank 20 to other parts of the base 2 and connects with other working parts.

[0018] The linkage mechanism 3 includes a connecting rod 31, a rocker tooth 32, and a lower shaft gear 33. The top end of the connecting rod 31 is connected to the upper transmission shaft end 111, and the bottom end of the connecting rod 31 is connected to the rocker tooth 32. The rocker tooth 32 is connected to the lower shaft gear 33, and the lower shaft gear 33 is mounted on the lower transmission shaft end 211.

[0019] The top of the upper oil tank 10 is provided with an opening, and a transparent sealing upper plate 12 is provided at the opening.

[0020] The sealing upper plate 12 is provided with an air outlet, and an air outlet plug 13 is provided in the air outlet.

[0021] The bottom of the lower oil tank 20 is provided with an opening, and a sealing lower plate 22 is provided at the opening.

[0022] A sealing gasket is provided between the bottom of the machine head 1 and the top of the base 2, and the sealing gasket is provided at least around the upper connecting port 101 and the lower connecting port 201.

[0023] According to the sewing machine of this application, the upper oil tank 10 and the lower oil tank 20 cooperate to form a closed overall oil tank, thereby changing the existing micro-oil lubrication to immersion lubrication, and maintaining the relative independence of the machine head 1 and the base 2 without changing more parts. The working structure and parts of other parts can directly adopt the existing sewing machine structure and parts.

[0024] By setting up the upper sealing plate 12 and the lower sealing plate 22 and the corresponding openings, the processing and manufacturing difficulty of the upper oil tank 10 and the lower oil tank 20 is improved, and the products are easier to assemble and maintain.

[0025] The sewing machine according to this application is mainly improved in its lubrication structure. The upper shaft, lower shaft, connecting rod, and gear serve as transmission system components, which is a specific embodiment of this application. In practical applications of the technical solution of this application, other conventional system components can also be used, and the invention is not limited to this.

[0026] In the accompanying drawings, the upper / lower oil tank walls also have some holes for installing other parts of the sewing machine, which, after installation and sealing, form a sealed structure. In practical application of the technical solution of this application, these holes can be eliminated or closed.

[0027] According to the sewing machine of this application, the original openwork parts of the existing sewing machine structure are completely sealed to form a closed chamber. The upper shaft, lower shaft, connecting rod, and gears are all placed in the sealed chamber and filled with gear oil, changing the original micro-oil lubrication to immersion lubrication. Compared with the previous structure, the length of the upper shaft is increased, two rubber oil seals are added at the front and rear ends where the upper shaft connects to the connecting rod, and the bearings are inverted to improve the airtightness of the oil chamber. A transparent observation chamber is formed at the cover plate above the oil chamber for easy observation of the gear lubrication status, and an openable vent is added.

[0028] According to the sewing machine of this application, noise and vibration can be reduced by sealing the oil tank, thereby enabling higher speed operation without frequent oiling; after long-term high-speed operation, the lower shaft is less likely to jam, and the operation speed can be increased from medium-low speed of 2,000 rpm to support long-term high-speed operation of 3,000 rpm.

[0029] The present invention has been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

[0030] Through the above description of the embodiments, those skilled in the art can clearly understand that this utility model is implementable. Of course, the situations listed above are merely examples, and this utility model is not limited thereto. Those skilled in the art should understand that other modifications or simplifications of the technical solutions of this utility model can be appropriately applied to this utility model and should be included within the scope of this utility model.

Claims

1. A sewing machine, characterized in that, The machine head (1) and base (2) are provided. The machine head (1) is provided with an upper shaft (11) and the base (2) is provided with a lower shaft (21). The upper shaft (11) and the lower shaft (21) are connected by a linkage mechanism (3). The machine head (1) is provided with an upper oil tank (10) and the base (2) is provided with a lower oil tank (20). The upper oil tank (10) is provided with an upper connecting port (101) at the bottom and a lower connecting port (201) at the top of the lower oil tank (20). The upper connecting port (101) is located above the lower connecting port (201) and communicates with the lower connecting port (201). The upper shaft is provided with an upper connecting port (101) at the bottom and a lower connecting port (201) at the top. The upper drive shaft end (111) of (11) is located in the upper oil tank (10), and the lower drive shaft end (211) of the lower shaft (21) is located in the lower oil tank (20); the upper part of the linkage mechanism (3) is connected to the upper drive shaft end (111) in the upper oil tank (10), and the lower part of the linkage mechanism (3) is connected to the lower drive shaft end (211) in the lower oil tank (20); the connecting rod (31) provided in the linkage mechanism (3) passes through the upper connecting port (101) and the lower connecting port (201) from the upper oil tank (10) to the lower oil tank (20).

2. A sewing machine according to claim 1, characterized in that, The upper drive shaft end (111) of the upper shaft (11) is mounted on the side wall of the upper oil tank (10) in the machine head (1) through oil seals (4) at both ends, which can rotate relative to each other.

3. A sewing machine according to claim 2, characterized in that, The engine head (1) has an upper shaft bearing (41) on the outer side of the upper oil tank (10) for supporting the upper shaft (11).

4. A sewing machine according to claim 1, characterized in that, The two ends of the lower drive shaft (211) of the lower shaft (21) are respectively mounted on the side wall of the lower oil tank (20) in the base (2) through copper sleeves (5).

5. A sewing machine according to claim 1, characterized in that, The linkage mechanism (3) includes a connecting rod (31), a rocker tooth (32), and a lower shaft gear (33). The top end of the connecting rod (31) is connected to the upper transmission shaft end (111), and the bottom end of the connecting rod (31) is connected to the rocker tooth (32). The rocker tooth (32) is connected to the lower shaft gear (33), and the lower shaft gear (33) is located on the lower transmission shaft end (211).

6. A sewing machine according to claim 1, characterized in that, The top of the upper oil tank (10) is provided with an opening, and a transparent sealing upper plate (12) is provided at the opening.

7. A sewing machine according to claim 6, characterized in that, The sealing upper plate (12) is provided with an air outlet, and an air outlet plug (13) is provided in the air outlet.

8. A sewing machine according to claim 1, characterized in that, The bottom of the lower oil tank (20) is provided with an opening, and a sealing lower plate (22) is provided at the opening.

9. A sewing machine according to claim 1, characterized in that, A sealing gasket is provided between the bottom of the machine head (1) and the top of the base (2), and the sealing gasket is provided at least around the upper connecting port (101) and the lower connecting port (201).

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