CN218696720U

CN218696720U - Needle bar grinding device for sewing machine

Info

Publication number: CN218696720U
Application number: CN202221923186.4U
Authority: CN
Inventors: 朱正保
Original assignee: Dalian Jiarui Clothing Co ltd
Current assignee: Dalian Jiarui Clothing Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2023-03-24
Anticipated expiration: 2032-07-25

Abstract

The utility model belongs to the technical field of the sewing machine needle bar processing technique and specifically relates to a needle bar grinding device for sewing machine, it includes base and circumference grinding subassembly, the support is installed to one side at base top, the rigid coupling has the fixed axle on the outer wall of support one side, circumference grinding unit mount is on the fixed axle, the top of base is provided with the fixed block, the top of base is provided with the actuating mechanism who is used for driving fixed block horizontal migration, the fixed block is close to one side of fixed axle and has seted up the fixed slot, the inside of fixed slot is provided with positioning mechanism, positioning mechanism is including setting up the connecting block at fixed slot axle center position, articulate four connecting rods on the connecting block outer wall, articulate respectively four draw runners at four connecting rod other ends and four arc type grip blocks that the rigid coupling is close to one end at four draw runners mutually. The utility model discloses can fix the needle bar of different specifications, can ensure the stability when fixing different needle bars in addition.

Description

Needle bar grinding device for sewing machine

Technical Field

The utility model relates to a sewing machine needle bar processing field especially relates to a needle bar grinding device for sewing machine.

Background

In a sewing machine, a sewing needle is fixed to a needle bar, the needle bar is moved up and down by a motor under the traction of a series of gears and cams, and the needle bar is moved up and down in a reciprocating manner, so that the surface of the needle bar is generally very smooth in order to reduce frictional resistance, and further, the surface of the needle bar needs to be processed to improve the smoothness of the surface of the needle bar.

The Chinese utility model patent with the publication number of CN212122640U discloses a grinding device for a needle bar of a sewing machine, which comprises a frame and an installation part fixed above one side of the frame, wherein a fixed shaft is fixed above one side of the installation part, a circumference grinding component is movably connected on the fixed shaft, a moving component for driving the needle bar to move is horizontally arranged below the installation part, and the moving component is connected with the circumference grinding component through a transmission part; the device drives a screw rod to rotate through a motor, the screw rod drives a screw tube to drive a central block and a needle rod fixed on the central block to move towards the direction close to a grinding wheel under the constraint of a limiting roller, meanwhile, the screw rod drives a turntable to rotate by means of a transmission part, the turntable drives a driven shaft, the grinding wheel and a pinion to do circular motion around a fixed shaft, the pinion, the driven shaft and the grinding wheel are driven to revolve around the circumference and rotate around the fixed shaft under the action of a fixed large gear, the surface of the fed needle rod is ground in a full range, and the feeding and grinding integrated function is achieved;

with respect to the related art among the above, the inventors consider that the following drawbacks exist: when the needle bars with different specifications are fixed through the positioning screws, the stability of the needle bars with different specifications is difficult to ensure in the fixing process, and the stability of the needle bars with different specifications in the grinding process is difficult to ensure.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of needle bar grinding device for sewing machine has solved among the prior art to the not firm problem of fixed of different specification needle bars.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a needle bar grinding device for sewing machine, includes base and circumference grinding subassembly, the support is installed to one side at base top, the rigid coupling has the fixed axle on the outer wall of support one side, circumference grinding unit mount is on the fixed axle, the top of base is provided with the fixed block, the top of base is provided with the actuating mechanism who is used for driving fixed block horizontal migration, the fixed block has been seted up near one side of fixed axle, the inside of fixed slot is provided with positioning mechanism, positioning mechanism is including setting up at the connecting block of fixed slot axle center position, articulate four connecting rods on the connecting block outer wall, articulate four draw runners at four connecting rod other ends respectively and four arc type grip blocks that the rigid coupling is close to one end mutually at four draw runners respectively, the axle center of fixed slot is located same level with the axle center of fixed axle, four connecting rod and four draw runners all use the connecting block to be the central ring array setting, four the one end that the draw runner was kept away from mutually all extends to the outside of fixed block, and all with the sliding connection, positioning mechanism still includes the adjusting part that is used for driving connecting block horizontal migration.

Preferably, actuating mechanism is including installing the motor on the support outer wall, the output shaft of motor runs through the support setting, actuating mechanism still includes the lead screw of rigid coupling in motor output shaft one end and the slider of spiro union in the lead screw outside, the fixed block rigid coupling is at the top of slider, the bottom of slider and the top butt of base, the other end of lead screw rotates and is connected with the supporting seat with base top rigid coupling.

Preferably, the circumference grinding subassembly includes the first gear of rotation connection in the fixed axle outside, rotate the transmission shaft of connection on first gear is close to fixed block one side outer wall, fixed cup joint at the outside second gear of motor output shaft and be used for driving the transmission part of transmission shaft rotation, the detachable emery wheel is installed to the other end of transmission shaft, first gear and second gear meshing.

Preferably, the transmission part comprises a third gear fixedly connected to the other end of the fixed shaft and a fourth gear fixedly sleeved outside the transmission shaft, and the third gear is meshed with the fourth gear.

Preferably, the adjusting part comprises a threaded sleeve which is rotatably connected to the outer wall of one side of the fixing block far away from the support and a screw rod which is screwed inside the threaded sleeve, and one end of the screw rod extends to the inside of the fixing groove and is fixedly connected with the outer wall of the connecting block.

Preferably, the handle has been cup jointed to the outside of swivel nut, the inside along the horizontal direction spiro union of handle has the bolt, the bolt runs through the handle setting, the outside movable sleeve of swivel nut is equipped with the skid resistant course with the fixed block rigid coupling, the one end and the handle butt of bolt, the other end and the skid resistant course butt of bolt.

The utility model has the advantages that: through the cooperation of each part of the positioning mechanism, needle bars with different specifications can be fixed, and the stability of fixing different needle bars can be ensured in addition, so that the problem that the machining quality of the needle bars is influenced due to looseness during machining is solved.

Drawings

Fig. 1 is a front view of the external structure of the present invention.

Fig. 2 is a front sectional view of the internal structure of the fixing block of the present invention.

Fig. 3 is a right side view of the internal structure of the fixing block of the present invention.

Reference numbers in the figures: 1. a base; 2. a support; 3. a fixed shaft; 4. a fixed block; 5. connecting blocks; 6. a connecting rod; 7. a slide bar; 8. an arc-shaped clamping block; 9. a motor; 10. a screw rod; 11. a slider; 12. a first gear; 13. a drive shaft; 14. a second gear; 15. a third gear; 16. a fourth gear; 17. a threaded sleeve; 18. a screw; 19. a handle; 20. a bolt; 21. an anti-slip layer; 22. and (5) grinding wheels.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a needle bar grinding device for a sewing machine, comprising a base 1 and a circumferential grinding component, wherein a support 2 is installed at one side of the top of the base 1, a fixed shaft 3 is fixedly connected to the outer wall of one side of the support 2, the circumferential grinding component is installed on the fixed shaft 3, a fixed block 4 is arranged above the base 1, a driving mechanism for driving the fixed block 4 to move horizontally is arranged at the top of the base 1, a fixed groove is formed at one side of the fixed block 4 close to the fixed shaft 3, a positioning mechanism is arranged inside the fixed groove and comprises a connecting block 5 arranged at the axis position of the fixed groove, four connecting rods 6 hinged to the outer wall of the connecting block 5, four sliding bars 7 respectively hinged to the other ends of the four connecting rods 6 and four arc-shaped clamping blocks 8 respectively fixedly connected to one ends of the four sliding bars 7, the axis of the fixed groove and the axis of the fixed shaft 3 are at the same horizontal height, the four connecting rods 6 and the four sliding bars 7 are arranged in an annular array with the connecting block 5 as the center, one end of the four sliding bars 7 extends to the outside of the fixed block 4 and are in sliding contact with the four fixing blocks 4, the adjusting components, and then the four sliding blocks are moved to the four sliding blocks 8 horizontally through the four arc-shaped clamping blocks, the four connecting blocks, and the four needle bar clamping blocks 5, so as to move to the four sliding blocks, and the four sliding blocks are moved to the fixed block 8;

the driving mechanism comprises a motor 9 installed on the outer wall of the support 2, an output shaft of the motor 9 penetrates through the support 2 to be arranged, the driving mechanism further comprises a lead screw 10 fixedly connected to one end of the output shaft of the motor 9 and a sliding block 11 screwed outside the lead screw 10, a fixing block 4 is fixedly connected to the top of the sliding block 11, the bottom of the sliding block 11 is abutted to the top of the base 1, the other end of the lead screw 10 is rotatably connected with a supporting seat fixedly connected to the top of the base 1, the lead screw 10 is driven to rotate by matching the output shaft of the starting motor 9, the sliding block 11 is further driven to horizontally move rightwards along the top of the base 1, the fixing block 4 and the needle rod are further driven to synchronously move rightwards, and therefore the position of the needle rod grinding can be adjusted;

the circumference grinding component comprises a first gear 12 rotationally connected to the outside of the fixed shaft 3, a transmission shaft 13 rotationally connected to the outer wall of the first gear 12 on one side close to the fixed block 4, a second gear 14 fixedly sleeved on the outside of an output shaft of the motor 9 and a transmission part for driving the transmission shaft 13 to rotate, a detachable grinding wheel 22 is installed at the other end of the transmission shaft 13, the first gear 12 is meshed with the second gear 14, the transmission part comprises a third gear 15 fixedly connected to the other end of the fixed shaft 3 and a fourth gear 16 fixedly sleeved on the outside of the transmission shaft 13, the third gear 15 is meshed with the fourth gear 16, the output shaft of the motor 9 drives the second gear 14 to rotate synchronously in the rotating process, the first gear 12 is driven to rotate through the meshing effect of the second gear 14 and the first gear 12, the transmission shaft 13 is driven to perform revolution motion by taking the fixed shaft 2 as a center, the transmission shaft 13 is driven to rotate through the meshing effect of the fourth gear 16 and the third gear 15, the grinding wheel 22 is driven to rotate and revolve at one side, and the outside of the needle rod is ground;

the adjusting assembly comprises a threaded sleeve 17 rotatably connected to the outer wall of one side, far away from the support 2, of the fixing block 4 and a screw 18 screwed in the threaded sleeve 17, one end of the screw 18 extends into the fixing groove and is fixedly connected with the outer wall of the connecting block 5, and the screw 18 can be driven to move leftwards or rightwards by rotating the threaded sleeve 17 and under the effect of screwing the threaded sleeve 17 and the screw 18, so that the connecting block 5 can be driven to move;

the handle 19 is sleeved outside the screw sleeve 17, the bolt 20 is screwed inside the handle 19 along the horizontal direction, the bolt 20 penetrates through the handle 19, the anti-slip layer 21 fixedly connected with the fixed block 4 is movably sleeved outside the screw sleeve 17, one end of the bolt 20 is abutted to the handle 19, the other end of the bolt 20 is abutted to the anti-slip layer 21, when a worker needs to rotate the screw sleeve 17 through the handle 19, one end of the bolt 20 is separated from the anti-slip layer 21 by rotating the bolt 20 anticlockwise, the screw sleeve 17 can be rotated through the handle 19, after the screw sleeve 17 is rotationally adjusted, one end of the bolt 20 is abutted to the anti-slip layer 21 by rotating the bolt 20 clockwise, the head of the other end of the bolt 20 is abutted to the handle 19, the problem that the screw sleeve 17 is loosened can be prevented, and the stability of fixing of the needle rod is further ensured.

The working principle is as follows: firstly, a worker puts one end of a needle bar into a fixed groove and locates between four arc-shaped clamping blocks 8, then drives a connecting block 5 to move horizontally leftwards through an adjusting component, and further drives four sliding strips 7 to approach each other through four connecting rods 6 respectively, thereby driving the four arc-shaped clamping blocks 8 to approach each other and fixing the needle bar, and drives a screw rod 10 to rotate through a starting motor 9 matching with an output shaft thereof, thereby driving a sliding block 11 to move horizontally rightwards along the top of a base 1, further driving a fixed block 4 and the needle bar to move synchronously rightwards, meanwhile, the output shaft of the motor 9 drives a second gear 14 to rotate synchronously in the rotating process, and drives a first gear 12 to rotate through the meshing effect of the second gear 14 and the first gear 12, thereby driving a transmission shaft 13 to do revolution motion with a fixed shaft 2 as a center, and driving the transmission shaft 13 to rotate through the meshing effect of a fourth gear 16 and a third gear 15, thereby driving one side and one side of a grinding wheel 22 to revolve, and further grinding the outer part of the needle bar to be ground.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A needle bar grinding device for a sewing machine comprises a base (1) and a circumference grinding component, it is characterized in that one side of the top of the base (1) is provided with a bracket (2), a fixed shaft (3) is fixedly connected on the outer wall of one side of the bracket (2), the circumference grinding component is arranged on the fixed shaft (3), a fixed block (4) is arranged above the base (1), the top of the base (1) is provided with a driving mechanism for driving the fixing block (4) to move horizontally, one side of the fixed block (4) close to the fixed shaft (3) is provided with a fixed groove, the inside of the fixed groove is provided with a positioning mechanism, the positioning mechanism comprises a connecting block (5) arranged at the axis position of the fixed groove, four connecting rods (6) hinged on the outer wall of the connecting block (5), four sliding bars (7) respectively hinged at the other ends of the four connecting rods (6) and four arc-shaped clamping blocks (8) respectively fixedly connected at one ends of the four sliding bars (7) close to each other, the axle center of the fixed groove and the axle center of the fixed shaft (3) are positioned at the same horizontal height, the four connecting rods (6) and the four sliding strips (7) are arranged in an annular array by taking the connecting block (5) as the center, the ends, far away from the four sliding strips (7), extend to the outside of the fixed block (4) and are in sliding connection with the fixed block (4), the positioning mechanism further comprises an adjusting component for driving the connecting block (5) to move horizontally.

2. The needle bar grinding device for the sewing machine is characterized in that the driving mechanism comprises a motor (9) installed on the outer wall of the support (2), an output shaft of the motor (9) penetrates through the support (2) to be arranged, the driving mechanism further comprises a screw rod (10) fixedly connected to one end of the output shaft of the motor (9) and a sliding block (11) screwed outside the screw rod (10), the fixed block (4) is fixedly connected to the top of the sliding block (11), the bottom of the sliding block (11) is abutted to the top of the base (1), and the other end of the screw rod (10) is rotatably connected with a supporting seat fixedly connected to the top of the base (1).

3. The needle bar grinding device for the sewing machine as claimed in claim 2, wherein the circumference grinding assembly comprises a first gear (12) rotatably connected to the outside of the fixed shaft (3), a transmission shaft (13) rotatably connected to the outer wall of the first gear (12) on the side close to the fixed block (4), a second gear (14) fixedly sleeved to the outside of the output shaft of the motor (9), and a transmission part for driving the transmission shaft (13) to rotate, the other end of the transmission shaft (13) is provided with a detachable grinding wheel (22), and the first gear (12) is engaged with the second gear (14).

4. A needle bar grinding device for sewing machines, as in claim 3, characterized in that said transmission means comprise a third gear (15) fixed to the other end of the fixed shaft (3) and a fourth gear (16) fixed externally to the transmission shaft (13), said third gear (15) being in mesh with the fourth gear (16).

5. The needle bar grinding device for the sewing machine as claimed in claim 1, characterized in that the adjusting assembly comprises a threaded sleeve (17) rotatably connected to the outer wall of the fixed block (4) on the side away from the support (2) and a screw (18) screwed inside the threaded sleeve (17), and one end of the screw (18) extends to the inside of the fixed groove and is fixedly connected with the outer wall of the connecting block (5).

6. The needle bar grinding device for the sewing machine as claimed in claim 5, wherein a handle (19) is sleeved on the outside of the threaded sleeve (17), a bolt (20) is screwed on the inside of the handle (19) along the horizontal direction, the bolt (20) penetrates through the handle (19) to be arranged, an anti-slip layer (21) fixedly connected with the fixed block (4) is movably sleeved on the outside of the threaded sleeve (17), one end of the bolt (20) is abutted to the handle (19), and the other end of the bolt (20) is abutted to the anti-slip layer (21).