Upper curved needle sliding rod

Abstract

The utility model relates to the technical field of sewing machines, and discloses an upper curved needle sliding rod which comprises a sliding rod body, the sliding rod body is connected with a pin shaft in an inserted mode, the pin shaft is connected with a crankshaft in an inserted mode, and a lubricating assembly is arranged in the sliding rod body. According to the upper curved needle sliding rod, the ratchet wheel, the transmission belt and the sliding rod oil line are arranged, the reciprocating motion of the crankshaft and the ratchet wheel drives the transmission belt and the sliding rod oil line to rotate, and when the sliding rod oil line moves into the crankshaft, lubricating oil is smeared to the inner wall of the crankshaft through the sliding rod oil line to lubricate the connecting positions of the pin shaft, the sliding rod body and the crankshaft; lubricating oil can be stably smeared to the surface of a friction part, untimely oil supply caused by high-speed movement is prevented, a sliding rod oil line is wetted only through the open groove, the lubricating oil is prevented from diffusing to the surface of a conveying belt, excessive oil supply is avoided, grease is prevented from splashing from a crankshaft or other friction parts, and the stability and cleanliness of the equipment operation environment are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to an upper curved needle slide bar. Background Technology

[0002] The moving parts of the upper looper slide of a sewing machine will wear and generate a lot of heat during high-speed operation. Therefore, sufficient lubricating oil is needed to lubricate and cool these moving parts to ensure that the sewing machine can work normally. In particular, for the slide crank pin that connects the upper looper slide and the crank, it is fixed on the crank and rotates relative to the slide at high speed during operation.

[0003] According to a public announcement (CN107313187B) of a lubrication structure for an upper curved needle slide mechanism of a sewing machine, the above application includes a slide rod disposed inside the sewing machine housing. The upper end of the slide rod is provided with a pin hole, and the lower end is provided with a hinge seat. The hinge seat is provided with hinge ends on both sides. An oil storage cavity is provided axially inside the slide rod. The oil storage cavity is provided with lubricating grease. The bottom of the oil storage cavity is provided with an oil outlet hole, or the oil storage cavity is provided with a slide rod oil line that passes through the bottom of the oil storage cavity and extends to the outside of the bottom of the cavity to the area between the two hinge ends.

[0004] However, in actual use, the above-mentioned lubrication structure relies on the oil line of the slide rod to penetrate the grease and the grease to flow to the crank pin due to capillary action. During high-speed operation, the friction surfaces of the slide rod and crank pin are subjected to increased force and frictional heat. The speed at which the oil line delivers grease by capillary action may not be able to keep up with the lubrication demand, resulting in insufficient lubrication and the inability to maintain a stable lubrication effect. In view of this, we propose an upper curved needle slide rod. Utility Model Content

[0005] The purpose of this invention is to provide an upper curved needle slide bar to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an upper curved needle slide bar, comprising a slide bar body, wherein the slide bar body is inserted into a pin shaft, the pin shaft is inserted into a crankshaft, and a lubrication assembly is provided inside the slide bar body, the lubrication assembly comprising:

[0007] A ratchet, which is fixedly connected to the inner wall of the crankshaft;

[0008] A fixed plug is fixedly connected to the inner wall of the slide bar body. A housing is fixedly connected to the top end face of the fixed plug. A limit block is fixedly connected to the inner wall of the housing. An opening groove is provided on the side wall of the housing.

[0009] A conveyor belt is fitted onto the side wall of a limiting post. A protrusion is fixedly connected to the inner wall of the conveyor belt, and a groove is formed on the outer wall of the conveyor belt. A slide rod oil line is fixedly connected to the inner wall of the groove.

[0010] Preferably, the conveyor belt abuts against the inner wall of the housing, and the conveyor belt is sleeved on the outer wall of the ratchet.

[0011] Preferably, the number of protrusions is set in several groups, and the several groups of protrusions are equally spaced on the inner wall of the conveyor belt. The protrusions mesh with the ratchet, and the reciprocating motion of the crankshaft and the ratchet drives the conveyor belt to rotate.

[0012] Preferably, the limiting block is movably connected to the protrusion, the conveyor belt is located between the housing and the limiting block, and the limiting block limits the conveyor belt so that the conveyor belt abuts against the inner wall of the housing.

[0013] Preferably, a plug is inserted into the inner wall of the slide bar body, and lubricating oil is provided between the fixed plug and the plug, so that the lubricating oil lubricates the connection between the pin shaft and the slide bar body and the crankshaft.

[0014] Preferably, a telescopic rod is fixedly connected to the inner wall of the slide rod body, and a push block is fixedly connected to the end of the telescopic rod. The push block abuts against the conveyor belt. A spring is sleeved on the side wall of the telescopic rod, with one end of the spring abutting against the slide rod body and the other end of the spring abutting against the push block.

[0015] Compared with the prior art, the present invention provides an upper curved needle slide bar, which has the following beneficial effects:

[0016] 1. This upper curved needle slide bar, through the setting of a ratchet, transmission belt, and slide bar oil line, the reciprocating motion of the crankshaft and ratchet drives the transmission belt and slide bar oil line to rotate. When the slide bar oil line moves into the inside of the crankshaft, the lubricating oil is applied to the inner wall of the crankshaft by the slide bar oil line, lubricating the pin shaft and slide bar body, crankshaft connection parts. It can stably apply the lubricating oil to the surface of friction parts, improve the lubrication effect, prevent the oil supply from being untimely due to high speed motion, and only immerse the lubricating rod oil line through the open groove to prevent the lubricating oil from spreading to the surface of the transmission belt, avoid excessive oil supply, prevent grease from splashing from the crankshaft or other friction parts, and ensure the stability and cleanliness of the equipment operating environment.

[0017] 2. The upper curved needle slide bar, through the set spring and push block, automatically compensates for changes in length, keeping the conveyor belt in a taut state at all times, avoiding slippage caused by slack, and ensuring the accuracy and stability of motion transmission. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0019] Figure 2 This is an exploded view of the crankshaft of this utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the slide bar body of this utility model;

[0021] Figure 4 This utility model Figure 3 Schematic diagram of the structure of region A in the middle;

[0022] Figure 5 This utility model Figure 3 Schematic diagram of the structure of region B in the middle;

[0023] Figure 6 This is a schematic diagram of the internal structure of the housing of this utility model;

[0024] Figure 7 This is an exploded view of the conveyor belt of this utility model.

[0025] In the diagram: 1. Slide rod body; 2. Pin; 3. Crankshaft; 4. Lubrication assembly; 401. Ratchet; 402. Fixing plug; 403. Housing; 404. Limiting block; 405. Limiting post; 406. Opening groove; 407. Conveyor belt; 408. Protrusion; 409. Slide rod oil line; 5. Plug; 6. Telescopic rod; 7. Push block; 8. Spring. Detailed Implementation

[0026] like Figures 1-7 As shown, this utility model provides a technical solution: an upper curved needle slide bar, including a slide bar body 1, the slide bar body 1 being inserted into a pin 2, the pin 2 being inserted into a crankshaft 3, and a lubrication assembly 4 being provided inside the slide bar body 1, the lubrication assembly 4 including:

[0027] In one embodiment of this utility model, a ratchet 401 is fixedly connected to the inner wall of the crankshaft 3, along with a ratchet 401, a fixing plug 402, a housing 403, a limiting block 404, a limiting post 405, an opening groove 406, a conveyor belt 407, a protrusion 408, and a slide bar oil line 409.

[0028] A fixed plug 402 is fixedly connected to the inner wall of the slide rod body 1. A housing 403 is fixedly connected to the top end face of the fixed plug 402. A limit block 404 is fixedly connected to the inner wall of the housing 403. An opening groove 406 is opened on the side wall of the housing 403. A plug 5 is inserted into the inner wall of the slide rod body 1. Lubricating oil is provided between the fixed plug 402 and the plug 5. The lubricating oil lubricates the connection between the pin 2 and the slide rod body 1 and the crankshaft 3.

[0029] The conveyor belt 407 is sleeved on the side wall of the limiting post 405. The inner wall of the conveyor belt 407 is fixedly connected with protrusions 408. Several sets of protrusions 408 are arranged at equal intervals on the inner wall of the conveyor belt 407. The protrusions 408 mesh with the ratchet 401. The reciprocating motion of the crankshaft 3 and the ratchet 401 drives the conveyor belt 407 to rotate. The outer wall of the conveyor belt 407 is provided with a groove. The inner wall of the groove is fixedly connected with a slide rod oil line 409.

[0030] The conveyor belt 407 abuts against the inner wall of the housing 403. The conveyor belt 407 is sleeved on the outer wall of the ratchet 401. The limiting block 404 is movably connected to the protrusion 408. The conveyor belt 407 is located between the housing 403 and the limiting block 404. The limiting block 404 limits the conveyor belt 407 so that the conveyor belt 407 abuts against the inner wall of the housing 403.

[0031] The slide body 1, pin 2, and crankshaft 3 are coated with black oxide film. The black oxide film has certain corrosion resistance and can isolate the metal substrate from direct erosion by air, moisture, and corrosive media. The black oxide film reduces the surface friction coefficient and has a strong ability to adsorb lubricating oil. It plays an excellent role in the lubrication system, reduces wear, and extends service life.

[0032] When crankshaft 3 and ratchet 401 rotate clockwise around pin 2, ratchet 401 meshes with protrusion 408, thereby driving conveyor belt 407 to rotate clockwise. When crankshaft 3 and ratchet 401 rotate counterclockwise, the teeth on the outer wall of ratchet 401 cannot drive protrusion 408 and conveyor belt 407 to rotate in the opposite direction. This causes the reciprocating motion of crankshaft 3 and ratchet 401 to drive conveyor belt 407 to rotate. When conveyor belt 407 rotates clockwise, lubricating oil connects to the slide bar oil line 409 through the opening groove 406. Upon contact, the slide rod oil line 409 is permeated with lubricating oil through capillary action. Then, when the slide rod oil line 409 moves into the inside of the crankshaft 3, the lubricating oil is applied to the inner wall of the crankshaft 3 by the slide rod oil line 409. As the crankshaft 3 rotates, the lubricating oil is gradually applied to the pin 2 and the slide rod body 1, lubricating the connection between the pin 2 and the slide rod body 1 and the crankshaft 3. This can stably apply the lubricating oil to the surface of the friction parts, improve the lubrication effect, and prevent untimely oil supply due to high-speed movement.

[0033] The housing 403 separates the conveyor belt 407 from the lubricating oil, and the lubricating oil line 409 is only immersed through the opening groove 406 to prevent the lubricating oil from spreading to the surface of the conveyor belt 407, avoid excessive oil supply, prevent grease from splashing from the crankshaft 3 or other friction parts, and ensure the stability and cleanliness of the equipment operating environment.

[0034] In addition, a telescopic rod 6 is fixedly connected to the inner wall of the slide rod body 1, and a push block 7 is fixedly connected to the end of the telescopic rod 6. The push block 7 abuts against the conveyor belt 407. A spring 8 is sleeved on the side wall of the telescopic rod 6. One end of the spring 8 abuts against the slide rod body 1, and the other end of the spring 8 abuts against the push block 7. When the crankshaft 3 and the ratchet 401 rotate counterclockwise, the ratchet 401 will push the conveyor belt 407 to move away from the axis of the ratchet 401, so that the conveyor belt 407 needs to have a certain redundancy. By pushing the push block 7 to abut against the conveyor belt 407 through the spring 8, the length change is automatically compensated, so that the conveyor belt 407 is always in a taut state, avoiding the slippage phenomenon caused by slack, and ensuring the accuracy and stability of motion transmission.

[0035] In this invention, during use, the reciprocating motion of the crankshaft 3 and ratchet 401 drives the conveyor belt 407 to rotate. The lubricating oil comes into contact with the slide bar oil line 409 through the open groove 406. The slide bar oil line 409 is permeated with lubricating oil through capillary action. When the slide bar oil line 409 moves into the inside of the crankshaft 3, the lubricating oil is then applied to the inner wall of the crankshaft 3 by the slide bar oil line 409. As the crankshaft 3 rotates, the lubricating oil is gradually applied to the pin 2 and the slide bar body 1, thus lubricating the connection between the pin 2, the slide bar body 1, and the crankshaft 3.

[0036] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A curved needle slide bar, comprising a slide bar body (1), wherein the slide bar body (1) is inserted into a pin (2), and the pin (2) is inserted into a crankshaft (3), characterized in that: The slide body (1) is internally provided with a lubrication assembly (4), which includes: A ratchet (401) is fixedly connected to the inner wall of the crankshaft (3); A fixing plug (402) is fixedly connected to the inner wall of the slide body (1). A housing (403) is fixedly connected to the top end face of the fixing plug (402). A limit block (404) is fixedly connected to the inner wall of the housing (403). An opening groove (406) is provided on the side wall of the housing (403). A conveyor belt (407) is sleeved on the side wall of the limiting post (405). A protrusion (408) is fixedly connected to the inner wall of the conveyor belt (407). A groove is opened on the outer wall of the conveyor belt (407). A slide rod oil line (409) is fixedly connected to the inner wall of the groove.

2. The upper curved needle slide bar according to claim 1, characterized in that: The conveyor belt (407) abuts against the inner wall of the housing (403), and the conveyor belt (407) is sleeved on the outer wall of the ratchet (401).

3. The upper curved needle slide bar according to claim 1, characterized in that: The number of the protrusions (408) is set in several groups, and the several groups of protrusions (408) are equally spaced on the inner wall of the conveyor belt (407). The protrusions (408) mesh with the ratchet (401).

4. The upper curved needle slide bar according to claim 1, characterized in that: The limiting block (404) is movably connected to the protrusion (408), and the conveyor belt (407) is located between the housing (403) and the limiting block (404).

5. The upper curved needle slide bar according to claim 1, characterized in that: A plug (5) is inserted into the inner wall of the slide body (1), and lubricating oil is provided between the fixing plug (402) and the plug (5).

6. The upper curved needle slide bar according to claim 1, characterized in that: A telescopic rod (6) is fixedly connected to the inner wall of the slide rod body (1). A push block (7) is fixedly connected to the end of the telescopic rod (6). The push block (7) abuts against the conveyor belt (407). A spring (8) is sleeved on the side wall of the telescopic rod (6). One end of the spring (8) abuts against the slide rod body (1), and the other end of the spring (8) abuts against the push block (7).

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