CN212122640U

CN212122640U - Grinding device for needle bar of sewing machine

Info

Publication number: CN212122640U
Application number: CN202020628402.7U
Authority: CN
Inventors: 张傲; 杜洁
Original assignee: Wujiang Wanping Xinxin Machinery Co ltd
Current assignee: Wujiang Wanping Xinxin Machinery Co ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2020-12-11
Anticipated expiration: 2030-04-23

Abstract

The utility model discloses a sewing machine needle bar grinding device, wherein a fixed shaft is fixed above one side of an installation part, a circumference grinding component is movably connected on the fixed shaft, a moving component for driving a 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 at the same time under the action of a fixed gear wheel, the surface of the fed needle rod is ground in a full range, and the feeding and grinding integrated function is.

Description

Grinding device for needle bar of sewing machine

Technical Field

The utility model relates to a mechanical equipment specifically is a sewing machine needle bar grinding device.

Background

In a sewing machine, a sewing needle is fixed to a needle bar, which is moved up and down by a motor through a series of gears and cams.

Since the needle bar reciprocates up and down, the surface of the needle bar is usually smooth to reduce frictional resistance, and the surface roughness is partially reduced by plating the surface of the needle bar, but the surface of the needle bar needs to have a certain standard finish regardless of plating.

At present, when the surface of a needle rod is machined, generally, grinding machining is carried out, feeding and grinding feeding are required to be respectively controlled through various electronic components, and the equipment has more electronic control devices and higher cost.

SUMMERY OF THE UTILITY MODEL

Based on the shortcomings in the prior art mentioned in the background art, the utility model provides a grinding device for a needle bar of a sewing machine.

The utility model discloses an adopt following technical scheme to overcome above technical problem, specifically do:

the utility model provides a sewing machine needle bar grinding device, includes the frame and fixes the installed part of frame one side top, wherein one side top of installed part is fixed with the fixed axle swing joint has circumference grinding subassembly on the fixed axle, just the below level of installed part is provided with the removal subassembly that is used for driving the needle bar to walk the position, remove the subassembly with connect through the driving medium between the circumference grinding subassembly.

As a further aspect of the present invention: the moving assembly comprises a lead screw horizontally arranged at the lower part of the mounting piece through a bearing, a servo motor fixed on the mounting piece and connected with one end of the lead screw, and a thread transmission structure arranged on the lead screw and used for fixing a needle rod;

the lead screw penetrates through the mounting piece and is connected with the output end of the servo motor.

As a further aspect of the present invention: the thread transmission structure comprises a solenoid, a limiting roller and a central block, wherein the solenoid is in threaded connection with the lead screw, the limiting roller is rotatably arranged at the lower part of the solenoid and is in rolling contact with the rack, and the central block is fixed at the upper part of the solenoid and is used for mounting a needle rod.

As a further aspect of the present invention: the circumferential grinding assembly comprises a rotary table, a driven shaft, a gear set and a grinding wheel, wherein the rotary table is arranged on the fixed shaft in a penetrating mode through a bearing, the driven shaft is horizontally and rotatably arranged on the eccentric position of the side wall of the rotary table, the gear set is used for connecting the driven shaft and the fixed shaft, and the grinding wheel is detachably connected to the end portion of the driven shaft;

the transmission piece is connected with the lead screw and the turntable.

As a further aspect of the present invention: the gear set comprises a pinion fixed on the driven shaft and a bull gear fixed on the fixed shaft and meshed with the pinion.

As a further aspect of the present invention: the side wall of the central block is provided with a mounting hole for fixing a needle rod, the mounting hole is coaxial and equal in height with the fixed shaft, and a positioning screw communicated with the mounting hole is in threaded connection above the central block.

After the structure more than adopting, the utility model discloses compare in prior art, possess following advantage: 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 at the same time under the action of a fixed gear wheel, the surface of the fed needle rod is ground in a full range, and the feeding and grinding integrated function is.

Drawings

FIG. 1 is a schematic view showing a needle bar grinding apparatus of a sewing machine.

FIG. 2 is a schematic view showing the structure of a center block and a mounting hole and a set screw in the needle bar grinding apparatus for a sewing machine.

FIG. 3 is a schematic view of a structure of a position limiting roller in the needle bar grinding device of the sewing machine.

In the figure: 1-a frame; 2-a mounting member; 3-a servo motor; 4-a lead screw; 5-a transmission member; 6, rotating a disc; 7-a fixed shaft; 8-driven shaft; 9-pinion gear; 10-a bull gear; 11-a grinding wheel; 12-a coil; 13-a limit roller; 14-a central block; 15-set screws; 16-mounting holes.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In addition, an element of the present invention may be said to be "secured to" or "disposed on" another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Referring to fig. 1 to 3, in an embodiment of the present invention, a grinding device for a needle bar of a sewing machine includes a frame 1 and a mounting member 2 fixed above one side of the frame 1, wherein a fixing shaft 7 is fixed above one side of the mounting member 2, a circumference grinding assembly is movably connected to the fixing shaft 7, a moving assembly for driving the needle bar to move is horizontally arranged below the mounting member 2, and the moving assembly is connected to the circumference grinding assembly through a transmission member 5;

when the moving assembly works, the needle rod is driven to horizontally move along the straight line direction, meanwhile, the moving assembly drives the circumferential grinding assembly to act by utilizing the transmission piece 5, the fed surface of the needle rod is subjected to annular grinding, the surface of the needle rod can be subjected to all-dimensional finish machining, and the surface roughness is reduced.

In an embodiment of the present invention, the moving assembly includes a screw 4 horizontally installed at the lower part of the installation member 2 through a bearing, a servo motor 3 fixed on the installation member 2 and connected to one end of the screw 4, and a screw transmission structure provided on the screw 4 for fixing a needle bar;

the lead screw 4 penetrates through the mounting piece 2 and is connected with the output end of the servo motor 3;

the screw rod 4 is driven to rotate by the working of the servo motor 3, and the rotating screw rod 4 drives the thread transmission structure to move along the axis of the screw rod 4, so that the needle rod is driven to linearly move for feeding.

In another embodiment of the present invention, the screw transmission structure comprises a screw tube 12 screwed on the lead screw 4, a limiting roller 13 rotatably disposed at the lower portion of the screw tube 12 and in rolling contact with the frame 1, and a central block 14 fixed at the upper portion of the screw tube 12 for mounting a needle rod;

the limiting roller 13 is in rolling contact with the rack 1 to prevent the screw tube 12 from being driven to rotate along with the screw rod 4 when the screw rod 4 rotates, so that the function that the screw tube 12 drives the central block 14 to move along the axis of the screw rod 4 is achieved.

In another embodiment of the present invention, the circumferential grinding assembly includes a rotary table 6 mounted on the fixed shaft 7 through a bearing, a driven shaft 8 horizontally rotatably disposed at an eccentric position of a side wall of the rotary table 6, a gear set for connecting the driven shaft 8 with the fixed shaft 7, and a grinding wheel 11 detachably connected to an end portion of the driven shaft 8;

the transmission piece 5 is connected with the screw rod 4 and the turntable 6;

when the screw rod 4 rotates, the transmission piece 5 is utilized to drive the rotary disc 6 to rotate, the rotary disc 6 rotates around the fixed shaft 7, and then the driven shaft 8 and the grinding wheel 11 are driven to do circular motion around the fixed shaft 7, and due to the action of the gear set, the driven shaft 8 and the grinding wheel 11 rotate while doing circular motion around the fixed shaft 7, so that the effect of grinding the surface circumference of the needle rod in all directions is achieved; the removable grinding wheel 11 allows to change the grinding wheels 11 of different sizes for needle bars of different diameter sizes.

In a further embodiment of the invention, the gear set comprises a pinion 9 fixed on the driven shaft 8 and a gearwheel 10 fixed on the fixed shaft 7 and meshing with the pinion 9;

when the driven shaft 8 and the grinding wheel 11 do circular motion around the fixed shaft 7, the pinion 9 drives the driven shaft 8 and the grinding wheel 11 to rotate under the action of the fixed gearwheel 10, and the effect of rotating the grinding wheel 11 around the fixed shaft 7 while revolving is finally realized similarly to the effect of separating a planetary gear.

In another embodiment of the present invention, a mounting hole 16 for fixing the needle bar is formed on the side wall of the central block 14, the mounting hole 16 is coaxial and equal in height with the fixing shaft 7, and a positioning screw 15 communicating with the mounting hole 16 is screwed above the central block 14;

the needle bar inserted into the mounting hole 16 is fixed by a set screw 15 to prevent the needle bar from rotating during grinding of the grinding wheel 11.

The foregoing is illustrative of the preferred embodiments of the present invention only, and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to be changed. However, all changes which come within the scope of the independent claims of the invention are to be embraced therein.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Claims

1. The utility model provides a sewing machine needle bar grinding device, includes frame (1) and fixes installed part (2) of frame (1) one side top, its characterized in that one side top of installed part (2) is fixed with fixed axle (7) swing joint has circumference grinding subassembly on fixed axle (7), and is in the below level of installed part (2) is provided with the removal subassembly that is used for driving the needle bar to walk the position, remove the subassembly with connect through driving medium (5) between the circumference grinding subassembly.

2. A grinding device for the needle bar of sewing machine according to claim 1, characterized in that the moving assembly comprises a screw (4) horizontally mounted on the lower part of the mounting member (2) through a bearing, a servo motor (3) fixed on the mounting member (2) and connected with one end of the screw (4), and a screw transmission structure provided on the screw (4) for fixing the needle bar.

3. A grinding device for the needle bar of a sewing machine according to claim 2, characterized in that the screw transmission structure comprises a screw tube (12) screwed on the screw rod (4), a limit roller (13) rotatably arranged at the lower part of the screw tube (12) and in rolling contact with the frame (1), and a center block (14) fixed at the upper part of the screw tube (12) for mounting the needle bar.

4. A grinding device for needle bars of sewing machines according to claim 2, characterized in that the circumference grinding assembly comprises a rotary table (6) mounted through bearings on the fixed shaft (7), a driven shaft (8) horizontally rotatably arranged on the eccentric position of the side wall of the rotary table (6), a gear set for connecting the driven shaft (8) and the fixed shaft (7), and a grinding wheel (11) detachably connected on the end of the driven shaft (8);

the transmission piece (5) is connected with the lead screw (4) and the turntable (6).

5. A grinding device according to claim 4, characterized in that said gear set comprises a pinion (9) fixed on said driven shaft (8) and a gearwheel (10) fixed on said fixed shaft (7) and meshing with said pinion (9).

6. The grinding device for the needle bar of the sewing machine according to claim 3, characterized in that the side wall of the central block (14) is provided with a mounting hole (16) for fixing the needle bar, the mounting hole (16) is coaxial and equal in height with the fixed shaft (7), and a positioning screw (15) communicated with the mounting hole (16) is connected above the central block (14) in a threaded manner.