Needle bar crank for intelligent sewing machine

Abstract

The utility model relates to the technical field of needle bar cranks, and discloses a needle bar crank for an intelligent sewing machine, which comprises a crank body, and an air inlet valve port is arranged on the surface of the crank body. According to the needle bar crank for the intelligent sewing machine, a contact arc block continuously makes contact with the interior of the sewing machine in the rotating process of the crank body, a straight bar continuously extrudes and stretches a spring, the straight bar moves to drive a protruding block to pass through a rotating groove, the rotating groove is driven to rotate, and an outer protruding ring drives an inner protruding ring to rotate; when moving to a proper position, the extrusion rod extrudes the pressed plate to extrude the oil bag, so that the lubricating oil is discharged from the oil outlet to lubricate the cambered surface, in contact with the crank body, of the inner wall of the sewing machine, and the crank body is prevented from being clamped, the straight rod moves when the reset spring resets, the ratchet wheel is clamped by the pawl to enable the outer convex ring to rotate, and the inner convex ring does not rotate; and it is guaranteed that the contact arc block makes contact for a certain number of times to discharge oil, long-time use of the oil bag is guaranteed, oil is accurately controlled, and the crank body is prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to needle bar crank technical field, concretely is a needle bar crank for intelligent sewing machine. BACKGROUND

[0002] Intelligent sewing machine can sew cotton, hemp, silk, wool, synthetic fiber and leather, plastic, paper and other products, and the stitching is neat and beautiful, flat and firm, and the sewing speed is fast and easy to use. And derived from hand-push embroidery computer embroidery and other artistic forms, needle bar crank makes the indispensable component of sewing machine.

[0003] According to a needle bar crank for sewing machine (announcement number: CN108149404A) disclosed, the connecting block at the lower end of the crank body in the above application is increased with a counterweight block, the first damping block and the second damping block are installed on the both sides of the connecting block, and a plurality of sets of damping springs are arranged in the inner side of the damping block. The effect of reducing the vibration of the needle bar crank during movement is reduced, the damping effect is excellent, the shaft sleeve can be designed to be detachable, the connection and installation of the crank body and the main shaft are facilitated, and time and effort are saved.

[0004] But the above-mentioned device in the actual use process, intelligent sewing machine starts, needle bar crank keeps on rotating, long time use is easy to produce contact under the action of centrifugal force with the inner wall of sewing machine, cause to produce friction, influence needle bar crank rotation, cause needle bar crank damage, in view of this, we put forward a kind of needle bar crank for intelligent sewing machine. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of needle bar crank for intelligent sewing machine, to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of needle bar crank for intelligent sewing machine, including crank body, the surface of the crank body is equipped with inlet valve, the camber surface of the crank body is equipped with oil outlet, the inside of the crank body is provided with oil bladder, the inside of the crank body is provided with oil control mechanism, the inside of the crank body is provided with stabilizing mechanism, the oil control mechanism includes:

[0007] Movable slot, the movable slot is equipped in the camber surface of crank body, the inner wall of the movable slot is fixedly installed stretch spring, the one end of the stretch spring away from movable slot inner wall is fixedly connected straight rod, the surface of the straight rod is fixedly installed lug, the one end of the straight rod away from stretch spring is fixedly connected contact arc block, the inner wall of the crank body is movably installed outer convex ring, the inner wall of the outer convex ring is equipped with rotation slot;

[0008] An outer convex ring, the inner wall of the crank body movably installs a pawl, the inner wall of the crank body is provided with an extrusion groove, the inner wall of the extrusion groove is fixedly connected with a return spring, and one end of the return spring away from the inner wall of the extrusion groove is fixedly connected with a pressure plate.

[0009] Preferably, the stabilizing mechanism comprises a stabilizing hole, the inner wall of the stabilizing hole is fixedly connected with a telescopic spring, one end of the telescopic spring away from the inner wall of the stabilizing hole is fixedly connected with a mounting block, the surface of the mounting block movably installs a stabilizing ball, and the inner part of the movable groove is fixedly connected with a stabilizing block.

[0010] Preferably, the number of the stabilizing holes is two, the two stabilizing holes are mirror image distributed on the curved surface of the straight rod, and the diameter of the stabilizing hole is matched with the diameter of the mounting block.

[0011] Preferably, the diameter of the movable groove is matched with the diameter of the straight rod, the outer side of the middle end of the movable groove is provided with a circular groove, and the diameter of the circular groove is matched with the length of the extrusion rod.

[0012] Preferably, the contact part between the outer convex ring and the inner convex ring is provided with a matched semicircular contact block, and the inner convex ring is sleeved on the curved surface of the outer convex ring.

[0013] Preferably, the number of the extrusion rods is several, the several extrusion rods are fixedly installed on the outer curved surface of the inner convex ring in a circumferential array, and the length of one of the several extrusion rods is greater than that of the other extrusion rods.

[0014] Compared with the prior art, the intelligent needle bar crank for a sewing machine has the following beneficial effects:

[0015] 1. The intelligent needle bar crank for a sewing machine is provided with an oil control mechanism, the contact arc block continuously contacts the inside of the sewing machine in the process of rotating the crank body, the straight rod continuously extrudes the tension spring, the movement of the straight rod drives the convex block to pass through the rotating groove, drives the rotating groove to rotate, drives the outer convex ring to rotate the inner convex ring, extrudes the pressure plate and extrudes the oil bag through the extrusion rod when moving to the appropriate position, makes the lubricating oil discharge from the oil outlet to lubricate the inner wall of the sewing machine and the curved surface of the crank body, prevents the crank body from being stuck, the straight rod moves when the return spring resets, the pawl clamps the ratchet wheel to make the outer convex ring rotate, the inner convex ring does not rotate, ensures that the contact arc block contacts a certain number of times to discharge oil, ensures that the oil bag is used for a long time, accurately controls oil, and prevents the crank body from being damaged.

[0016] 2、The needle bar crank of the intelligent sewing machine is provided with a stabilizing mechanism, the crank body is easy to vibrate, the straight rod is easy to vibrate and affects the accuracy of the assembly, the stable ball on the surface of the straight rod is clamped in the gap between the stable blocks under the action of the extension spring and is fixed, the shaking of the straight rod is prevented, the oil control of the oil control mechanism is affected, the oil control and oil output are more stable, the surface of the crank body and the contact of the sewing machine are more smooth, and the crank body is prevented from being damaged. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main body structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the local section structure of the crank body of the utility model;

[0019] Figure 3 It is a schematic diagram of the local structure of the straight rod of the utility model;

[0020] Figure 4 It is a schematic diagram of the local structure of the outer convex ring of the utility model;

[0021] Figure 5 It is a schematic diagram of the local explosion structure of the mounting block of the utility model;

[0022] Figure 6 It is a schematic diagram of the local enlarged structure of the crank body of the utility model.

[0023] In the drawing: 1, crank body; 2, air inlet valve port; 3, oil control mechanism; 301, contact arc block; 302, straight rod; 303, convex block; 304, outer convex ring; 305, rotating groove; 306, inner convex ring; 307, extrusion rod; 308, ratchet wheel; 309, ratchet pawl; 310, tension spring; 311, movable groove; 312, extrusion groove; 313, return spring; 314, pressure receiving plate; 4, stabilizing mechanism; 401, stabilizing hole; 402, extension spring; 403, mounting block; 404, stable ball; 405, stable block; 5, oil outlet; 6, oil bladder. DETAILED DESCRIPTION

[0024] As Figures 1-6As shown, the utility model provides a technical scheme: a needle bar crank for intelligent sewing machine, including crank body 1, the surface of crank body 1 is equipped with inlet valve 2, the camber surface of crank body 1 is equipped with oil outlet 5, the inside of crank body 1 is provided with oil bladder 6, the inside of crank body 1 is provided with oil control mechanism 3, the inside of crank body 1 is provided with stabilizing mechanism 4, oil control mechanism 3 includes contact arc block 301, straight rod 302, convex block 303, outer convex ring 304, rotation groove 305, inner convex ring 306, extrusion rod 307, ratchet wheel 308, pawl 309, stretch spring 310, movable slot 311, extrusion slot 312, return spring 313, pressure plate 314.

[0025] In an embodiment of the utility model, movable slot 311 is equipped in the camber surface of crank body 1, the inner wall of movable slot 311 is fixedly installed stretch spring 310, the one end of stretch spring 310 away from the inner wall of movable slot 311 is fixedly connected straight rod 302, the surface of straight rod 302 is fixedly installed convex block 303, the one end of straight rod 302 away from stretch spring 310 is fixedly connected contact arc block 301, the inner wall of crank body 1 is movably installed outer convex ring 304, the inner wall of outer convex ring 304 is equipped with rotation groove 305, the inner wall of outer convex ring 304 is movably installed extrusion rod 307, the surface of outer convex ring 304 is fixedly installed ratchet wheel 308, the inner wall of crank body 1 is movably installed pawl 309, the inner wall of crank body 1 is equipped with extrusion slot 312, the inner wall of extrusion slot 312 is fixedly connected return spring 313, the one end of return spring 313 away from the inner wall of extrusion slot 312 is fixedly connected pressure plate 314.

[0026] In addition, stabilizing mechanism 4 includes stabilizing hole 401, stabilizing hole 401 is equipped in the camber surface of straight rod 302, the inner wall of stabilizing hole 401 is fixedly connected expansion spring 402, the one end of expansion spring 402 away from the inner wall of stabilizing hole 401 is fixedly connected mounting block 403, the surface of mounting block 403 is movably installed stabilizing ball 404, the inside of movable slot 311 is fixedly connected stabilizing block 405, the inside of crank body 1 is equipped with oil outlet groove, and it is convenient to install oil bladder 6.

[0027] In the embodiment of the utility model, the number of stable holes 401 is two, two stable holes 401 are mirror image distribution and are arranged on the curved surface of the straight rod 302, the diameter of the stable hole 401 is matched with the diameter of the mounting block 403, so that the mounting block 403 can drive the stable ball 404 to move in the stable hole 401, the diameter of the movable groove 311 is matched with the diameter of the straight rod 302, a circular groove is arranged on the outer side of the middle end of the movable groove 311, the diameter of the circular groove is matched with the length of the extrusion rod 307, so that the longest extrusion rod 307 can contact the pressure plate 314, a matched semicircular contact block is arranged at the contact position of the outer convex ring 304 and the inner convex ring 306, so that the outer convex ring 304 rotates to drive the inner convex ring 306 to rotate, the inner convex ring 306 is not rotated under the influence of the ratchet claw 309, the inner convex ring 306 is sleeved on the curved surface of the outer convex ring 304, the number of extrusion rods 307 is several, the several extrusion rods 307 are fixedly installed on the outer curved surface of the inner convex ring 306 in a circular array, the length of one of the several extrusion rods 307 is greater than that of the other extrusion rods 307, so that the longest extrusion rod 307 can extrude the pressure plate 314.

[0028] In the utility model, when in use, the contact arc block 301 continuously contacts the inside of the sewing machine in the process of rotating the crank body 1, so that the straight rod 302 continuously extrudes and stretches the spring 310, the movement of the straight rod 302 drives the convex block 303 to pass through the rotating groove 305, drives the rotating groove 305 to rotate, so that the outer convex ring 304 drives the inner convex ring 306 to rotate, when moving to the appropriate position, the extrusion rod 307 extrudes the pressure plate 314, and then extrudes the oil bag 6, so that the lubricating oil is discharged from the oil outlet 5 to lubricate the contact position between the inner wall of the sewing machine and the curved surface of the crank body 1, prevents the crank body 1 from being stuck, when the straight rod 302 is reset by the reset spring 313, the ratchet claw 309 clamps the ratchet wheel 308, so that the outer convex ring 304 rotates, the inner convex ring 306 does not rotate, ensures that the contact arc block 301 contacts a certain number of times to discharge oil, ensures that the oil bag 6 is used for a long time, accurately controls the oil, and prevents the crank body 1 from being damaged.

[0029] Further, the crank body 1 is easy to vibrate, so that the straight rod 302 is easy to vibrate and affects the accuracy of the assembly, the stable ball 404 on the surface of the straight rod 302 is clamped in the gap between the stable blocks 405 under the action of the telescopic spring 402 and is fixed, prevents the shaking of the straight rod 302 from affecting the oil control of the oil control mechanism 3, makes the oil control more stable, contacts the surface of the crank body 1 and the sewing machine more smoothly, and prevents the crank body 1 from being damaged.

[0030] The above is a detailed description of the utility model, but some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, the modifications or improvements without departing from the spirit of the utility model are within the protection scope of the utility model.

Claims

1. A needle bar crank for an intelligent sewing machine, comprising a crank body (1), wherein an air inlet valve (2) is provided on the surface of the crank body (1), an oil outlet (5) is provided on the arc surface of the crank body (1), and an oil bladder (6) is provided inside the crank body (1), characterized in that: The inside of the crank body (1) is provided with an oil control mechanism (3), and the inside of the crank body (1) is provided with a stabilizing mechanism (4), the oil control mechanism (3) comprises: The movable groove (311) is provided on the curved surface of the crank body (1), the inner wall of the movable groove (311) is fixedly installed with a tension spring (310), one end of the tension spring (310) away from the inner wall of the movable groove (311) is fixedly connected with a straight rod (302), the surface of the straight rod (302) is fixedly installed with a protruding block (303), one end of the straight rod (302) away from the tension spring (310) is fixedly connected with a contact arc block (301), the inner wall of the crank body (1) is movably installed with an outer convex ring (304), and the inner wall of the outer convex ring (304) is provided with a rotating groove (305). The outer convex ring (304) is movably arranged in the inner wall of the crank body (1), the surface of the outer convex ring (304) is fixedly installed with a pressing rod (307), the surface of the outer convex ring (304) is fixedly installed with a ratchet wheel (308), the inner wall of the crank body (1) is movably installed with a pawl (309), the inner wall of the crank body (1) is provided with an extrusion groove (312), the inner wall of the extrusion groove (312) is fixedly connected with a return spring (313), and one end of the return spring (313) away from the inner wall of the extrusion groove (312) is fixedly connected with a pressure plate (314).

2. A needle bar crank for a smart sewing machine as claimed in claim 1, wherein: The stabilizing mechanism (4) comprises a stabilizing hole (401) provided on the curved surface of the straight rod (302), the inner wall of the stabilizing hole (401) is fixedly connected with a telescopic spring (402), one end of the telescopic spring (402) away from the inner wall of the stabilizing hole (401) is fixedly connected with a mounting block (403), and the surface of the mounting block (403) is movably installed with a stabilizing ball (404).

3. A needle bar crank for a smart sewing machine as claimed in claim 2, wherein: The number of the stabilizing holes (401) is two, and the two stabilizing holes (401) are mirror-symmetrically arranged on the curved surface of the straight rod (302), and the diameter of the stabilizing hole (401) is matched with the diameter of the mounting block (403).

4. A needle bar crank for a smart sewing machine as claimed in claim 1, wherein: The diameter of the movable groove (311) is matched with the diameter of the straight rod (302), and a circular groove is formed on the outer side of the middle end of the movable groove (311), and the diameter of the circular groove is matched with the length of the pressing rod (307).

5. A needle bar crank for a smart sewing machine as claimed in claim 1, wherein: The contact part of the outer convex ring (304) and the inner convex ring (306) is provided with a matched semicircular contact block, and the inner convex ring (306) is sleeved on the curved surface of the outer convex ring (304).

6. A needle bar crank for a smart sewing machine as claimed in claim 1, wherein: The number of the pressing rods (307) is several, the several pressing rods (307) are fixedly installed on the outer curved surface of the inner convex ring (306) in a circumferential array, and the length of one of the pressing rods (307) is greater than that of the other pressing rods (307).

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