Lubricating mechanism of sewing machine

Abstract

The utility model relates to the technical field of sewing machine lubrication, and discloses a sewing machine lubrication mechanism which comprises a machine head and a mounting plate arranged on the machine head, a lubrication cylinder is arranged on the mounting plate, a lubrication cavity is arranged in the lubrication cylinder, one end of the lubrication cavity is open, the lubrication cavity is used for storing lubricating oil, and an insertion cylinder extending into an oil hole is arranged on the lower end face of the lubrication cylinder. A slidable push plate is further arranged in the lubricating cavity, a push rod with one end extending out of the lubricating cavity is arranged on the push plate, a limiting assembly used for limiting movement of the push rod is arranged on the mounting plate, and a dismounting and mounting assembly used for dismounting and mounting the lubricating cylinder on the mounting plate is further arranged on the mounting plate. By means of the structure, movement of the push rod is limited through the limiting assembly, lubricating oil pushed into the oil hole by the push plate is quantitative, and therefore the situation that when the lubricating oil is injected into the oil hole, the lubricating oil injected into the oil hole is too much or too little, and the actual using effect is affected can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machine lubrication, in particular to a lubrication mechanism for a sewing machine. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on a sewing material to interweave or sew one or more layers of sewing material together. After a sewing machine has been used for a long time, the mutual friction between the parts in the sewing machine can easily cause the parts to wear out, thereby reducing the service life of the parts. In the prior art, lubricating oil is usually added to the oil hole to reduce the friction between the parts, thereby extending the service life of the sewing machine.

[0003] For example, a sewing machine disclosed in the patent with announcement number CN210002069U can reduce the sound of the whole machine, making the noise reduction effect of the whole machine better and improving the comfort of sewing workers. Moreover, compared with the noise reduction device that reduces noise by adding an elastic damping structure, the noise reduction device of the sewing machine has a simple structure; however, when the sewing machine is actually used, the staff needs to manually pour the lubricating oil into the oil hole on the machine head, which may easily lead to too much or too little lubricating oil being poured into the oil hole. Too much lubricating oil will cause waste of lubricating oil, and too little lubricating oil will lead to insufficient lubrication between parts, resulting in wear between parts during work, and then damage to parts, so there is room for improvement. Utility Model Content

[0004] The utility model aims to provide a lubricating mechanism for a sewing machine to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A lubrication mechanism for a sewing machine comprises a machine head and a mounting plate arranged on the machine head, a lubrication cylinder is arranged on the mounting plate, a lubrication cavity with an opening at one end for storing lubrication oil is arranged in the lubrication cylinder, an insertion cylinder extending into an oil hole is arranged on the lower end surface of the lubrication cylinder, a slidable push plate is also arranged in the lubrication cavity, a push rod with one end extending out of the lubrication cavity is arranged on the push plate, the push rod is used to push the push plate to squeeze the lubrication oil in the lubrication cavity, so as to fill the lubrication oil into the oil hole, a limiting assembly for limiting the movement of the push rod is arranged on the mounting plate, and a disassembly assembly for disassembling and assembling the lubrication cylinder on the mounting plate is also arranged on the mounting plate.

[0007] Preferably, a fixing block is provided on one side wall of the lubricating cylinder, and insertion holes are provided at both ends of the fixing block. A box body is provided on the mounting plate, and a cavity is provided in the box body.

[0008] The disassembly and assembly component includes a movable plate that is relatively arranged in the cavity and can move. Movable rods with one end extending outside the box body are arranged on the movable plate. Insertion plates are arranged at the extending ends of the movable rods, and insertion blocks are arranged on the insertion plates. A driving member is also arranged in the cavity. The driving member is used to drive the two movable plates to approach each other, insert the two insertion plates into the corresponding insertion holes, and realize the installation of the lubricating cylinder on the mounting plate.

[0009] Preferably, a notch is arranged on the bottom side wall of the cavity;

[0010] The driving member includes an upper rack and a lower rack that are relatively arranged in the cavity and can move. One ends of the upper rack and the lower rack are respectively connected to the corresponding movable plates. A rotatable gear is arranged between the upper rack and the lower rack. The upper rack and the lower rack are both arranged to mesh with the gear. A sliding plate with one end extending into the notch is arranged on the side wall of the lower rack. A spring for driving the sliding plate to move is arranged in the notch. The spring drives the sliding plate to move to realize the mutual approach of the two movable plates.

[0011] Preferably, a moving groove is opened on the outer side wall of the box body along the moving direction of the movable plate. A pull rod with one end extending outside the moving groove is arranged on the upper rack.

[0012] Preferably, a limiting rod is arranged on the push rod, and a limiting groove is opened along the length direction of the limiting rod;

[0013] The limiting component includes a limiting box arranged on the mounting plate. A limiting cavity is arranged on one side wall of the limiting box. A rotatable lead screw is arranged in the limiting cavity. A threaded block is sleeved on the lead screw in a threaded manner. A positioning rod is arranged on the threaded block. One end of the positioning rod extends into the limiting groove to realize the limitation of the movement of the push rod.

[0014] Preferably, one end of the lead screw extends outside the limiting box, and a hand crank for driving the lead screw to rotate is arranged at the extending end of the lead screw.

[0015] Preferably, a groove is opened at a position of the limiting groove close to the push plate.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. In the present utility model, the movement of the push rod is limited by the limiting component, so that the lubricating oil pushed into the oil hole by the push plate is quantitative. Compared with the existing ones, when the sewing machine lubricating mechanism is actually used, it can avoid too much or too little lubricating oil being filled into the oil hole, thus affecting the actual use effect.

[0018] 2. In the present utility model, opposite through rods are fixedly installed in the cavity. One ends of the two through rods respectively penetrate through the two push plates. The upper rack and the lower rack are respectively sleeved on the corresponding through rods to realize the movable installation of the upper rack and the lower rack in the cavity. At the same time, it can also make the movement of the upper rack and the lower rack more stable. Brief Description of the Drawings

[0019] Figure 1 One of the overall structural schematic diagrams of a lubrication mechanism in the present utility model for a sewing machine.

[0020] Figure 2 Structural schematic diagram of the lubricating cylinder on the mounting plate in the present utility model.

[0021] Figure 3 Cross-sectional structural schematic diagram of the lubricating cylinder in the present utility model.

[0022] Figure 4 Structural schematic diagram of the lubricating cylinder in the present utility model.

[0023] Figure 5 Structural schematic diagram of the box body in the present utility model.

[0024] Figure 6 Cross-sectional structural schematic diagram of the box body in the present utility model.

[0025] Figure 7 Structural schematic diagram of the insertion block mounted on the insertion plate in the present utility model.

[0026] The meanings of the reference numerals in the figure are as follows:

[0027] 110, machine head; 120, mounting plate; 130, lubricating cylinder;

[0028] 201, lubricating cavity; 210, push rod; 220, box body; 230, limiting rod; 231, limiting groove; 240, limiting box; 241, limiting cavity; 250, lead screw; 251, hand wheel; 260, threaded block; 261, positioning rod;

[0029] 300, insertion cylinder; 310, push plate; 321, groove;

[0030] 400, fixing block; 401, insertion hole; 410, intercepting plate;

[0031] 501, moving groove; 510, pull rod;

[0032] 601, cavity; 610, moving plate; 620, moving rod; 621, insertion plate; 631, notch; 640, upper rack; 650, lower rack; 651, sliding plate; 660, spring; 670, gear; 680, through rod;

[0033] 700, insertion block. Detailed Description of the Preferred Embodiment

[0034] To further understand the content of the present utility model, the present utility model will be described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present utility model and not for limiting it.

[0035] The following will be further described in detail with reference to the attached Figures 1 - 7 drawings for this embodiment.

[0036] As Figure 1 shown, a lubricating mechanism for a sewing machine in this embodiment includes a machine head 110 and a mounting plate 120 provided on the machine head 110. A lubricating cylinder 130 is provided on the mounting plate 120. A lubricating cavity 201 with one end open and used for storing lubricating oil is provided in the lubricating cylinder 130. An insertion cylinder 300 extending into an oil hole is provided on the lower end surface of the lubricating cylinder 130. A slidable push plate 310 is further provided in the lubricating cavity 201. A push rod 210 with one end extending outside the lubricating cavity 201 is provided on the push plate 310. The push rod 210 is used to push the push plate 310 to squeeze the lubricating oil in the lubricating cavity 201, so as to realize the filling of the lubricating oil into the oil hole. A limiting component for limiting the movement of the push rod 210 is provided on the mounting plate 120. A disassembly and assembly component for disassembling and assembling the lubricating cylinder 130 on the mounting plate 120 is further provided on the mounting plate 120.

[0037] In this embodiment, an oil hole is provided at the upper end surface of the machine head 110, and lubricating oil is added to the machine head 110 through the oil hole;

[0038] Among them, the lubricating cylinder 130 is installed on the mounting plate 120 through the disassembly and assembly component, and the insertion cylinder 300 penetrates through the mounting plate 120 fixed at the upper end of the machine head 110 and extends into the oil hole. When it is necessary to fill the oil hole with lubricating oil and lubricate the components in the machine head 110, it is necessary to first limit the moving distance of the push rod 210 through the limiting component. Then, the staff drives the push plate 310 to move through the push rod 210, so that the movement of the push plate 310 can fill the lubricating oil in the lubricating cavity 201 into the oil hole through the insertion cylinder 300, thereby realizing the lubrication of the components in the machine head 110;

[0039] Among them, the movement of the push rod 210 is limited through the limiting component, so that the lubricating oil pushed by the push plate 310 into the oil hole is quantitative. Compared with the existing ones, when this kind of lubricating mechanism for a sewing machine is actually used, it can avoid too much or too little lubricating oil being filled into the oil hole, thereby affecting the actual use effect;

[0040] Among them, the push rod 210 is fixedly installed on the push plate 310, and the insertion cylinder 300 is fixedly installed on the lubricating cylinder 130. When the push rod 210 moves, it can drive the push plate 310 to move within the lubricating cylinder 130. The movement of the push plate 310 can extrude the lubricating oil in the lubricating cavity 201. Through the extrusion of the lubricating oil by the push plate 310, the lubricating oil in the lubricating cavity 201 can be filled into the oil hole through the insertion cylinder 300;

[0041] Among them, a piston made of silica gel is provided on the side wall of the push plate 310 facing the inside of the lubricating cylinder 130. The piston is slidably attached to the inner wall of the lubricating cylinder 130 to ensure that the lubricating oil in the lubricating cylinder 130 is extruded and discharged through the insertion cylinder 300 when it moves;

[0042] Among them, the mounting plate 120 is fixedly installed on the upper side wall of the machine head 110. When the lubricating cylinder 130 is installed on the mounting plate 120 through the disassembly and assembly component, the installation of the lubricating cylinder 130 on the machine head 110 can be realized;

[0043] During its actual use, the diameter of the insertion cylinder 300 is small. When the push plate 310 does not move, the lubricating oil in the lubricating cavity 201 will not flow out from the insertion cylinder 300.

[0044] As Figures 1 - 7 shown, in this embodiment, a fixing block 400 is provided on one side wall of the lubricating cylinder 130. Jacks 401 are provided at both ends of the fixing block 400. A box body 220 is provided on the mounting plate 120, and a cavity 601 is provided inside the box body 220;

[0045] The disassembly and assembly component includes moving plates 610 that are relatively arranged and movable inside the cavity 601. Moving rods 620 with one end extending outside the box body 220 are provided on the moving plates 610. Insertion plates 621 are provided at the extending ends of the moving rods 620. Insertion blocks 700 are provided on the insertion plates 621. A driving member is also provided inside the cavity 601. The driving member is used to drive the two moving plates 610 to approach each other, insert the two insertion plates 621 into the corresponding jacks 401, and realize the installation of the lubricating cylinder 130 on the mounting plate 120.

[0046] In this embodiment, through the settings of the fixing block 400, the jack 401, the box body 220, the cavity 601, the moving plate 610, the moving rod 620, the insertion plate 621, the insertion block 700 and the driving member, by fixedly installing the fixing block 400 on the lubricating cylinder 130, fixedly installing the box body 220 on the mounting plate 120, fixedly installing one end of the moving rod 620 on the moving plate 610, fixedly installing the insertion plate 621 on the moving rod 620, and fixedly installing the insertion block 700 on the insertion plate 621, when the driving member in the cavity 601 drives the two push plates 310 to approach each other, the two push plates 310 move and can drive the two insertion plates 621 to approach each other through the moving rod 620, so that the two insertion blocks 700 on the two insertion plates 621 are inserted into the corresponding jacks 401, realizing the installation of the lubricating cylinder 130 on the mounting plate 120.

[0047] As Figures 1 - 6 shown, in this embodiment, a notch 631 is provided on the bottom side wall of the cavity 601;

[0048] The driving member includes an upper rack 640 and a lower rack 650 that are relatively arranged and movable in the cavity 601. One ends of the upper rack 640 and the lower rack 650 are respectively connected to the corresponding moving plates 610. A rotatable gear 670 is provided between the upper rack 640 and the lower rack 650. The upper rack 640 and the lower rack 650 are both engaged with the gear 670. A slide plate 651 with one end extending into the notch 631 is provided on the side wall of the lower rack 650. A spring 660 for driving the slide plate 651 to move is provided in the notch 631. The spring 660 drives the slide plate 651 to move to realize the mutual approach of the two moving plates 610.

[0049] In this embodiment, through the settings of the notch 631, the upper rack 640, the lower rack 650, the gear 670, the slide plate 651 and the spring 660, by respectively connecting one ends of the upper rack 640 and the lower rack 650 to the corresponding moving plates 610 and fixedly installing the slide plate 651 on the lower rack 650, when the spring 660 pushes the slide plate 651 to move, the slide plate 651 can drive the lower rack 650 to move. The movement of the lower rack 650 drives the gear 670 to rotate. When the gear 670 rotates, the rotation of the gear 670 can drive the upper rack 640 to move, thereby realizing the mutual approach of the two upper racks 640 and the lower rack 650 to drive the two moving plates 610;

[0050] Among them, the gear 670 is rotatably installed in the cavity 601 through a mounting shaft, realizing the rotational installation of the gear 670 in the cavity 601;

[0051] Wherein, opposite through rods 680 are fixedly installed inside the cavity 601. One ends of the two through rods 680 respectively penetrate through the two push plates 310. The upper rack 640 and the lower rack 650 are respectively sleeved on the corresponding through rods 680, realizing the movable installation of the upper rack 640 and the lower rack 650 inside the cavity 601. At the same time, it can also make the movement of the upper rack 640 and the lower rack 650 more stable;

[0052] During actual use, a moving groove 501 is formed in the outer side wall of the box body 220 along the moving direction of the moving plate 610. A pull rod 510 with one end extending out of the moving groove 501 is fixedly installed on the upper rack 640. When the pull rod 510 moves along the moving groove 501, the pull rod 510 can drive the upper rack 640 to move inside the cavity 601. The movement of the upper rack 640 will drive the gear 670 to rotate, and the rotation of the gear 670 drives the lower rack 650 to move, so that the two moving plates 610 move away from each other. When the two moving plates 610 move away from each other, the moving rod 620 can drive the plug plate 621 to move, so that the plug block 700 on the plug plate 621 slides out of the corresponding jack 401, thereby releasing the installation of the lubricating cylinder 130 on the mounting plate 120.

[0053] As Figures 1 - 4 shown, in this embodiment, a limiting rod 230 is provided on the push rod 210, and a limiting groove 231 is formed along the length direction of the limiting rod 230;

[0054] The limiting component includes a limiting box 240 provided on the mounting plate 120. A limiting cavity 241 is provided on one side wall of the limiting box 240. A rotatable lead screw 250 is provided inside the limiting cavity 241. A threaded block 260 is threadedly sleeved on the lead screw 250. A positioning rod 261 is provided on the threaded block 260. One end of the positioning rod 261 extends into the limiting groove 231 to realize the limiting of the movement of the push rod 210.

[0055] In this embodiment, through the settings of the limiting rod 230, the limiting groove 231, the limiting box, the limiting cavity 241, the lead screw 250, the threaded block 260 and the positioning rod 261, by fixedly installing the limiting rod 230 on the push rod 210, fixedly installing the limiting box 240 on the mounting plate 120, rotatably installing the two ends of the lead screw 250 in the limiting cavity 241 through bearings, and fixedly installing the positioning rod 261 on the threaded block 260. When one end of the positioning rod 261 extends into the limiting groove 231, when the push rod 210 drives the push plate 310 to move, the movement of the push rod 210 can drive the limiting rod 230 to move. When the positioning rod 261 in the limiting groove 231 abuts against one end of the limiting groove 231, the movement of the push rod 210 is limited;

[0056] Wherein, when the positioning rod 261 abuts against one end of the limiting groove 231, the push rod 210 cannot move. At this time, accidental contact with the push rod 210 can be avoided, preventing the push rod 210 from moving;

[0057] Wherein, the limiting rod 230 is marked with scales. When the positioning rod 261 points to different scales, the push rod 210 can move to different distances, enabling different amounts of lubricating oil to be accurately filled into the oil hole, which has good practicability;

[0058] Wherein, the limiting cavity 241 limits the threaded block 260. When the lead screw 250 rotates, the lead screw 250 is in threaded engagement with the threaded block 260, enabling the threaded block 260 to move. The movement of the threaded block 260 can drive the positioning rod 261 to point to scales at different positions;

[0059] Wherein, one end of the lead screw 250 extends outside the limiting box 240, and a hand crank 251 for driving the lead screw 250 to rotate is fixedly installed at the extending end of the lead screw 250, facilitating the driving of the lead screw 250 to rotate through the hand crank 251;

[0060] Wherein, a groove 321 is formed at a position of the limiting groove 231 close to the push plate 310. An intercepting plate 410 for intercepting the push plate 310 is fixedly installed at the opening of the lubricating cylinder 130. When new lubricating oil needs to be added to the lubricating cavity 201, the push rod 210 needs to be pulled outwards so that the push plate 310 abuts against the intercepting plate 410. At this time, the positioning rod 261 corresponds to the groove 321. Then, the installation of the lubricating cylinder 130 on the mounting plate 120 is released through the pull rod 510. Finally, the lubricating cylinder 130 is lifted upwards so that the lubricating cylinder 130 can be removed from the mounting plate 120, and then new lubricating oil can be added to the lubricating cylinder 130;

[0061] During actual use, when the lubricating cavity 201 is filled with lubricating oil, the push plate 310 abuts against the intercepting plate 410. When the lubricating cylinder 130 is installed on the mounting plate 120 through the disassembly and assembly component, one end of the positioning rod 261 can be located inside the limiting groove 231 through the groove 321, thereby continuing to limit the movement of the push rod 210.

[0062] Working principle: First, drive the inserts 700 on the two plug plates 621 away from each other through the pull rod 510. Then, place the lubricating cylinder 130 on the mounting plate 120 and insert the insertion cylinder 300 into the oil hole. One end of the positioning rod 261 is snapped into the limiting groove 231. At this time, release the drive on the pull rod 510, and the inserts 700 on the two plug plates 621 are inserted into the corresponding jacks 401 to achieve the installation of the lubricating cylinder 130 on the mounting plate 120. When it is necessary to fill the oil hole with lubricating oil, rotate the lead screw 250 by driving the handwheel 251, so that the lead screw 250 drives the positioning rod 261 on the threaded block 260 to move. When the positioning rod 261 points to the specified scale, drive the push plate 310 to move through the push rod 210, and then the lubricating oil in the lubricating cavity 201 can be filled into the oil hole to lubricate the components in the machine head 110.

Claims

1. A lubricating mechanism for a sewing machine, comprising a machine head (110) and a mounting plate (120) disposed on the machine head (110), characterized in that: A lubrication cylinder (130) is provided on the mounting plate (120), a lubrication cavity (201) having an opening at one end and used for storing lubrication oil is provided in the lubrication cylinder (130), an insertion cylinder (300) extending into the oil hole is provided on the lower end surface of the lubrication cylinder (130), a slidable push plate (310) is also provided in the lubrication cavity (201), a push rod (210) having one end extending out of the lubrication cavity (201) is provided on the push plate (310), the push rod (210) is used to push the push plate (310) to squeeze the lubrication oil in the lubrication cavity (201), so as to fill the lubrication oil into the oil hole, a limiting assembly for limiting the movement of the push rod (210) is provided on the mounting plate (120), and a disassembly assembly for disassembling and assembling the lubrication cylinder (130) on the mounting plate (120) is also provided on the mounting plate (120).

2. A sewing machine lubrication mechanism according to claim 1, characterized in that: A fixing block (400) is provided on one side wall of the lubrication cylinder (130), and insertion holes (401) are provided at both ends of the fixing block (400). A box body (220) is provided on the mounting plate (120), and a cavity (601) is provided in the box body (220); The disassembly and assembly components include movable plates (610) relatively arranged in the cavity (601) and movable. The movable plates (610) are each provided with a movable rod (620) with one end extending out of the box body (220). The extending end of the movable rod (620) is each provided with an insert plate (621). The insert plate (621) is each provided with an insert block (700). A driving member is also provided in the cavity (601). The driving member is used to drive the two movable plates (610) to approach each other and insert the two insert plates (621) into the corresponding insert holes (401) to achieve the installation of the lubricating cylinder (130) on the mounting plate (120).

3. A sewing machine lubrication mechanism according to claim 2, characterized in that: A notch (631) is provided on the bottom side wall of the cavity (601); The driving member comprises an upper rack (640) and a lower rack (650) which are relatively arranged in the cavity (601) and are movable. One end of the upper rack (640) and the lower rack (650) are respectively connected to the corresponding movable plate (610). A rotatable gear (670) is arranged between the upper rack (640) and the lower rack (650). Both the upper rack (640) and the lower rack (650) are arranged to mesh with the gear (670). A slide plate (651) having one end extending into the notch (631) is arranged on the side wall of the lower rack (650). A spring (660) for driving the slide plate (651) to move is arranged in the notch (631). The spring (660) drives the slide plate (651) to move so as to achieve the mutual approach of the two movable plates (610).

4. A sewing machine lubrication mechanism according to claim 3, characterized in that: A moving groove (501) is provided on the outer wall of the box body (220) along the moving direction of the moving plate (610), and a pull rod (510) with one end extending out of the moving groove (501) is provided on the upper rack (640).

5. A sewing machine lubrication mechanism according to claim 1, characterized in that: A limiting rod (230) is provided on the push rod (210), and a limiting groove (231) is provided on the limiting rod (230) along its length direction; The limiting assembly comprises a limiting box (240) arranged on the mounting plate (120), a limiting cavity (241) being arranged on one side wall of the limiting box (240), a rotatable screw rod (250) being arranged in the limiting cavity (241), a threaded sleeve being provided with a threaded block (260) on the screw rod (250), a positioning rod (261) being arranged on the threaded block (260), one end of the positioning rod (261) extending into the limiting groove (231) to limit the movement of the push rod (210).

6. A sewing machine lubrication mechanism according to claim 5, characterized in that: One end of the screw rod (250) is arranged to extend out of the limit box (240), and the extended end of the screw rod (250) is provided with a hand-cranked wheel (251) for driving the screw rod (250) to rotate.

7. A sewing machine lubrication mechanism according to claim 5, characterized in that: A groove (321) is formed in the limiting groove (231) at a position close to the push plate (310).

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