CN212404457U

CN212404457U - Foot pad structure of sewing machine frame

Info

Publication number: CN212404457U
Application number: CN202020831455.9U
Authority: CN
Inventors: 蔡炳清; 黄小青; 祝书伟; 李渊; 徐智
Original assignee: Jack Sewing Machine Co Ltd
Current assignee: Jack Technology Co Ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2021-01-26
Anticipated expiration: 2030-05-18

Abstract

The utility model provides a foot pad structure of a sewing machine frame, which belongs to the technical field of sewing machines. It solves the technical problems such as poor adaptability of vibration reduction when the same foot pad is installed on different types of sewing machines. The foot pad structure includes a soft pad and an adjusting support seat for fixing on the bottom of the frame; the soft pad is provided with a base, and the upper side of the base is provided with a groove for embedding the adjusting support seat, and several grooves are arranged in the groove Compression spring, both ends of the compression spring abut against the bottom surface of the adjusting support seat and the bottom surface of the groove respectively, and the adjusting support seat and the base are screwed together by axial screws; the inner side wall of the groove is pasted with a damping layer to adjust the support The outer peripheral surface of the lower end of the seat abuts against the inner wall of the damping layer. The arrangement of the central axis screw, the damping layer and the compression spring of the utility model improves the vibration damping adaptability of the foot pad structure installed on different types of sewing machines.

Description

Foot pad structure of sewing machine frame

Technical Field

The utility model belongs to the technical field of sewing machine, a callus on sole structure of sewing machine frame is related to.

Background

The sewing machine frame is as platen and sewing machine's carrier, be the indispensable partly in the sewing machine, the callus on the sole that the frame was installed through four angles meets with ground, the frame can vibrate in sewing machine operation in-process, the callus on the sole has the effect of damping, current callus on the sole is usually by locking screw, adjust supporting seat and circular cushion and constitute, wherein the internal thread of locking screw meshes with the external screw thread of adjusting the supporting seat mutually, it is injection moulding and the two is non-detachable to adjust the supporting seat and circular cushion, the sewing machine of different models is basically all installs same callus on the sole on the market at present, from the angle of damping, it should be that the machine of each model all should design and correspond damped circular cushion and just can guarantee best damping effect, because the vibration ratio of machine is bigger, current callus on the sole has just satisfied the demand of damping.

Chinese patent (publication number: CN 204626007U; published Japanese 2015-09-09) discloses a foot pad of a sewing machine frame, which consists of a base and a stud arranged in the center of the base, wherein an outer hexagonal positioning nut used for fixing the foot pad and the sewing machine frame is screwed on the stud, the base consists of a rubber pad and a limiting screw cap, a bulge is arranged on the rubber pad, a connecting groove is arranged in the center of the top of the bulge, an external thread is arranged on the outer part of the bulge, the external thread is matched with an internal thread arranged on the inner side of the bottom of the limiting screw cap, and a round hole used for sleeving the stud is arranged in the center of the limiting screw cap; the bottom of the stud is fixedly provided with a positioning plate, and the structural size of the positioning plate is matched with the shape and size of the connecting groove.

The rubber pad and the stud in the sewing machine frame foot pad disclosed in the patent document are detachable, and sewing machines with different models need to be provided with frame foot pads with rubber pads with different models in the production process, which is very troublesome for manufacturers, and the production efficiency of the sewing machine is influenced.

Disclosure of Invention

The utility model discloses to the above-mentioned problem that prior art exists, provide a callus on sole structure of sewing machine frame, the utility model aims to solve the technical problem that: how to improve the vibration reduction adaptability of the same foot pad arranged on different types of sewing machines.

The purpose of the utility model can be realized by the following technical proposal:

a foot pad structure of a sewing machine frame comprises a soft pad and an adjusting support seat fixedly connected to the bottom of the frame; the adjustable support is characterized in that a base is fixedly arranged on the soft pad, a groove for embedding the adjusting support seat is formed in the upper side face of the base, a plurality of vertical compression springs are distributed in the groove, two ends of each compression spring are respectively abutted against the bottom face of the adjusting support seat and the groove bottom face of the groove, and the adjusting support seat is in threaded connection with the base through an axial screw.

The working principle is as follows: the cushion and the base in the technical scheme are both injection molded, the cushion and the base cannot rotate relatively after being molded, the base is connected with the adjusting support seat through shaft position screws, the weights of different types of sewing machines are generally different, when the foot pad is installed on frames of the sewing machines of different types, a compression spring between the base and the adjusting support seat is in a compression state, the compression amount of the compression spring can be correspondingly changed along with different stresses, the compression spring can absorb part of vibration energy when the frames vibrate, and the vibration reduction adaptability of the same foot pad on the sewing machines of different types can be improved due to the existence of the compression spring; the axis position screw plays a guiding role in the foot pad structure, when the cushion is rotated, the adjusting support seat can rotate simultaneously with the cushion and the two does not have relative motion, the adjusting support seat only moves along the length direction of the axis position screw, and a guarantee is provided for improving the vibration reduction adaptability of the foot pad structure on different types of sewing machines.

In the foot pad structure of the sewing machine frame, the damping layer is adhered to the inner side wall of the groove, and the outer peripheral surface of the lower end of the adjusting support seat is abutted against the inner wall of the damping layer. Paste the damping layer between regulation backup pad and base, sewing machine's vibration can make the damping layer warp, and then changes partial vibration energy into heat energy to reach the purpose of damping.

In the foot pad structure of the sewing machine frame, the base is provided with a first positioning hole for embedding the lower end of the compression spring at the bottom surface of the groove, the bottom side surface of the adjusting support seat is provided with a second positioning hole opposite to the first positioning hole, the upper end of the compression spring is embedded in the second positioning hole, and each compression spring corresponds to one first positioning hole and one second positioning hole. The compression spring can be well restrained at a determined position due to the existence of the first positioning hole and the second positioning hole, and the phenomenon that the compression spring deviates due to vibration of the sewing machine is avoided.

Preferably, in the technical scheme, the number of the first positioning holes and the second positioning holes is four, the first positioning holes and the second positioning holes are evenly distributed at intervals, the number of the compression springs is four, and the number of the shaft position screws is two and is symmetrically distributed.

In the foot pad structure of the sewing machine frame, the base comprises a disc-shaped first damping part and a cylindrical second damping part, the lower side of the second damping part is fixedly arranged in the middle of the upper side of the first damping part, the groove is formed in the second damping part and vertically penetrates through the upper side and the lower side of the second damping part, and the first positioning hole is formed in the upper side face of the first damping part. Vibration damping portion one is located the cushion, and when sewing machine vibrated, the cushion warp owing to the effect of received power, and vibration energy conversion this moment is heat energy to play the effect of damping, two inner groovies of vibration damping portion have compression spring and recess side and have the damping layer and can alleviate the vibration, thereby improved the damping adaptability of this callus on the sole structure.

In the foot pad structure of the sewing machine frame, the periphery of the first vibration damping part is symmetrically provided with a plurality of groups of anti-rotation notches. As preferred, the quantity of preventing rotating the breach be four and along the even interval distribution of circumference of damping portion one, because base and cushion are injection moulding, the cushion can be embedded full with a damping portion breach, prevents base and cushion relative motion.

In the above foot pad structure of the sewing machine frame, the compression spring is a rectangular spring. The rectangle spring is that square wire rod makes to the dynamics is a lot of than ordinary spring dynamics, and antifatigue also will be better than ordinary spring, makes this callus on the sole mechanism install adaptability when on different grade type sewing machine better.

In the callus on sole structure of foretell sewing machine frame, adjust the supporting seat including being the cylindric body of rod and the pedestal that is the cake form, the body of rod with pedestal integrated into one piece sets up, the lower extreme of the body of rod sets firmly pedestal upside middle part, the periphery of the body of rod has the screw thread, the pedestal is located in the recess of base, a plurality of locating hole two is located on the downside of pedestal, the downside periphery of pedestal has the spigot surface towards the central slope of pedestal downside, pedestal downside border has the fillet. The pedestal is provided with spigot surface and fillet, is in order to facilitate the fine damping layer of packing into the recess of the pedestal ability of adjusting the supporting seat.

In the above-mentioned foot pad structure of sewing machine frame, have on the lower extreme outer peripheral face of the body of rod and be annular bulge, the cross-section of bulge is regular hexagon, the spiro union has lock nut on the body of rod. The support seat can be conveniently adjusted and screwed on the frame.

In the above-mentioned foot pad structure of the sewing machine frame, the base body is provided with a through hole through which the shaft position screw passes, the upper side of the vibration reduction part is provided with a threaded hole corresponding to the through hole, the upper end of the shaft position screw is provided with a cap body, the cap body of the shaft position screw is positioned on the upper side of the base body, the cross section of the cap body is hexagonal, and the lower end of the shaft position screw is screwed in the threaded hole of the first vibration reduction part. Because the gravity of adjusting the supporting seat is far less than the elasticity of compression spring, can adjust the supporting seat to the suitable position in the base recess through the degree of depth of control axle position screw lower extreme and screw hole spiro union, the cap body cross-section of axle position screw is regular hexagon, conveniently screws into and screws out the axle position screw.

In the callus on sole structure of foretell sewing machine frame, the base is made by the metal material, the cushion is the cake form setting and is made by the PVC material, the upside of cushion has the confession the base inlays the mounting groove of establishing, the shape of mounting groove with base outside shape is the same, the downside of base with the interval has between the downside of cushion, the integrative injection moulding of cushion and base. The cross section of the cushion is circular, the contact surface of the cushion and the ground is large, so that the sewing machine is stable in operation, the cushion is made of PVC materials, and the cushion is made of damping materials, so that the vibration damping effect is achieved.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses well compression spring can absorb some vibration energy, has improved the damping adaptability of this callus on the sole structure on different grade type sewing machine.

2. The utility model discloses the setting on well damping layer can convert some vibration energy into heat energy, has played the purpose of damping.

3. The utility model discloses the setting of well axle position screw had both guaranteed that cushion and regulation supporting seat do not take place relative rotation under compression spring's effect, guaranteed again that the regulation supporting seat can be along axle position screw up-and-down motion to this callus on the sole structure can carry out the damping to different model sewing machines.

Drawings

Fig. 1 is a schematic perspective view of the present footpad structure.

FIG. 2 is a front view of the present footpad structure

Fig. 3 is a cross-sectional view at a-a in fig. 2.

Fig. 4 is a partially enlarged structural view at B of fig. 2.

Fig. 5 is a schematic view of the base of the present footpad structure.

FIG. 6 is a schematic view of an adjustable support base of the present footpad structure.

In the figure, 1, a cushion; 11. mounting grooves; 2. adjusting the supporting seat; 21. a rod body; 21a, a projection; 22. a base body; 22a and a positioning hole II; 22b, a guide surface; 22c, round corners; 22d, a through hole; 3. a base; 31. a first vibration damping part; 31a, a first positioning hole; 31b, an anti-rotation notch; 31c, a threaded hole; 32. a second vibration damping part; 32a, a groove; 4. a compression spring; 5. an axial screw; 51. a cap body; 6. a damping layer; 7. and locking the nut.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 6, the callus on sole structure in this embodiment includes cushion 1, base 3, the rigid coupling is at the regulation supporting seat 2 of frame bottom, cushion 1 is the cake form setting and is made by the PVC material, base 3 is made by the metal material, 1 upside of cushion has the mounting groove 11 that is used for installing base 3, the lower extreme of base 3 is located mounting groove 11 and has the interval between 3 downside of base and cushion 1, the shape of mounting groove 11 is the same with 3 outside shapes of base in cushion 1,

cushion

1 and 3 two integrative injection moulding of base, thereby link firmly together. Specifically, the base 3 comprises a first damping part 31 and a second damping part 32 integrally formed with the first damping part 31, the first damping part 31 is disc-shaped, the second damping part 32 is cylindrical or barrel-shaped, the middle parts of the first damping part 31 and the second damping part 32 are positioned in the mounting groove 11 of the cushion 1 below, the lower side of the second damping part 32 is fixedly connected with the middle part of the upper side of the first damping part 31, the upper side of the first damping part 31 is provided with a downward inclined plane, the inclined plane extends from the lower end periphery of the second damping part 32 to the peripheral edge of the first damping part 31, four groups of anti-rotation notches 31b are symmetrically arranged on the periphery of the first damping part 31, as the base 3 and the cushion 1 are formed by injection molding, the cushion 1 can fully embed the anti-rotation notches 31b to prevent the relative rotation between the base 3 and the cushion 1, the four anti-rotation notches 31b are uniformly distributed at intervals of 90 degrees around the periphery of the first damping part 31, the groove 32a is located on the second vibration damping part 32 and penetrates through the upper side and the lower side of the second vibration damping part 32, the damping layer 6 is adhered to the inner wall of the groove 32a, and a plurality of compression springs 4 are arranged in the groove 32a, preferably, the compression springs 4 are rectangular springs and are four in number. Adjust supporting seat 2 including the pedestal 22 that is the cake form and being cylindric body of rod 21, pedestal 22 and the body of rod 21 here are that integrated into one piece sets up, the lower extreme of the body of rod 21 sets firmly in the upside middle part of pedestal 22, pedestal 22 is located the damping layer 6 of 3 recess 32a of base, the pedestal 22 periphery leans on with the inner wall counterbalance of damping layer 6, the vertical axle position screw 5 that wears to be equipped with on the pedestal 22, the tip spiro union of axle position screw 5 is on damping portion 31 of base 3, the upper end butt of compression spring 4 is on the pedestal 22 downside, the lower extreme butt of compression spring 4 is on the last side of damping portion 31, the periphery of the body of rod 21 has screw thread and spiro union has and is used for adjusting the lock nut 7 that supporting seat 2 fixed in the frame.

Further, as shown in fig. 2 to 6, four compression springs 4 are uniformly distributed in a groove 32a of the base 3, a first positioning hole 31a for embedding the lower end of the compression spring 4 is formed in the upper side surface of a first damping portion 31 of the base 3, a second positioning hole 22a for embedding the upper end of the compression spring 4 is formed in the lower side surface of a seat body 22 of the adjusting support seat 2, the first positioning hole 31a and the second positioning hole 22a are four, the first positioning hole 31a and the second positioning hole 22a are arranged in a one-to-one correspondence manner, two axial screws 5 are arranged, two through holes 22d for the axial screws 5 to penetrate are symmetrically formed in positions, close to the edge, of the upper side of the seat body 22, threaded holes 31c corresponding to the two through holes 22d are formed in the upper side surface of the first damping portion 31 of the base 3, the lower ends of the axial screws 5 are screwed in the threaded holes 31c, the upper ends of the axial screws 5 are provided with cap bodies 51; the periphery of the lower side of the seat body 22 of the adjusting support seat 2 is provided with a guide surface 22b inclined towards the center of the lower side of the seat body 22, and the edge of the lower side of the seat body 22 is provided with a round angle 22 c; the lower periphery of the rod body 21 of the adjusting support seat 2 is provided with an annular bulge 21a extending outwards, and the cross section of the bulge 21a is also hexagonal or regular hexagonal.

The adjusting support seat 2 is fixed on the rack through a locking nut 7, the compression spring 4 can be compressed under the action of the gravity of the sewing machine, the common weights of the sewing machines of different models are different, when the sewing machine sews, the rack can vibrate, the compression amount of the compression spring 4 can change under the action of vibration, and a part of vibration energy can be absorbed, so that the vibration adaptability of the foot pad mechanism is improved; the damping layer 6 can deform in the vibration process of the frame, and part of vibration energy is converted into heat energy, so that the vibration damping effect is further achieved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A foot pad structure of a sewing machine frame, comprising a soft pad (1) and an adjusting support seat (2) for being fixed on the bottom of the frame; it is characterized in that, the soft pad (1) is fixed with A base (3), the upper side of the base (3) is provided with a groove (32a) into which the adjustment support base (2) is embedded, and a plurality of vertical compression springs are arranged in the groove (32a) (4), both ends of the compression spring (4) abut on the bottom surface of the adjustment support seat (2) and the groove bottom of the groove (32a) respectively, and the adjustment support seat (2) is connected to the bottom of the groove (32a). The base (3) is screwed to each other by means of an axial screw (5).

2 . The foot pad structure of a sewing machine frame according to claim 1 , wherein a damping layer ( 6 ) is pasted on the inner side wall of the groove ( 32 a ), and the adjusting support seat ( 2 ) has a damping layer ( 6 ). The outer peripheral surface of the lower end abuts against the inner wall of the damping layer (6).

3. The foot pad structure of a sewing machine frame according to claim 2, wherein the bottom surface of the base (3) located in the groove (32a) is provided with a lower end of the compression spring (4) for embedding The first positioning hole (31a) is provided, the bottom surface of the adjustment support seat (2) is provided with a positioning hole two (22a) opposite to the positioning hole one (31a), and the upper end of the compression spring (4) is embedded is arranged in the second positioning hole (22a); each of the compression springs (4) corresponds to one positioning hole one (31a) and one positioning hole two (22a).

4 . The foot pad structure of a sewing machine frame according to claim 3 , wherein the base ( 3 ) comprises a disc-shaped vibration damping part 1 ( 31 ) and a cylindrical vibration damping part 2 ( 4 . 32), the lower end of the second vibration damping part (32) is fixed on the upper middle part of the vibration damping part one (31), and the groove (32a) is located on the second vibration damping part (32) and The upper and lower sides of the second vibration damping part (32) are vertically penetrated, and a plurality of the positioning holes (31a) are located on the upper side of the vibration damping part one (31).

5 . The foot pad structure of a sewing machine frame according to claim 4 , wherein a plurality of groups of anti-rotation notches ( 31 b ) are symmetrically formed on the outer circumference of the first vibration damping part ( 31 ). 6 .

6. The foot pad structure of a sewing machine frame according to claim 1, wherein the compression spring (4) is a rectangular spring.

7. The foot pad structure of a sewing machine frame according to claim 4 or 5, wherein the adjusting support base (2) comprises a cylindrical rod body (21) and a pie-shaped base body (22) ), the rod body (21) and the seat body (22) are integrally formed, the lower end of the rod body (21) is fixed in the middle of the upper side of the seat body (22), and the outer circumference of the rod body (21) has thread, the seat body (22) is located in the groove (32a) of the base (3), a plurality of the positioning holes (22a) are located on the lower side of the seat body (22), the seat The lower outer periphery of the body (22) has a guide surface (22b) inclined toward the center of the lower side of the seat body (22), and the lower edge of the seat body (22) has rounded corners (22c).

8 . The foot pad structure of a sewing machine frame according to claim 7 , wherein the outer peripheral surface of the lower end of the rod body ( 21 ) has an annular protruding portion ( 21 a ), and the protruding portion ( 21 a ) The cross section of the rod body (21) is a regular hexagon, and a locking nut (7) is screwed on the rod body (21).

9 . The foot pad structure of a sewing machine frame according to claim 7 , wherein the seat body ( 22 ) is provided with a through hole ( 22 d ) for the axial screw ( 5 ) to pass through. 10 . The upper side of the first vibration damping part (31) has a threaded hole (31c) corresponding to the through hole (22d), the upper end of the axial screw (5) has a cap (51), and the axial screw ( 5) The cap body (51) is located on the upper side of the seat body (22) and has a regular hexagonal cross section, and the lower end of the axial screw (5) is screwed into the threaded hole of the vibration damping part 1 (31). (31c).

10 . The foot pad structure of a sewing machine frame according to claim 1 , wherein the base ( 3 ) is made of a metal material, and the soft pad ( 1 ) is provided in the shape of a round cake and is made of a PVC material. 11 . The upper side of the cushion (1) has a mounting groove (11) for the base (3) to be embedded in, and the shape of the mounting groove (11) is the same as the shape of the outer side of the base (3), so The cushion (1) and the base (3) are integrally injection-molded.