CN214655614U

CN214655614U - Feed dog frame adjustment mechanism

Info

Publication number: CN214655614U
Application number: CN202120826086.9U
Authority: CN
Inventors: 杨金娣; 陈美正; 潘兵; 卓洋; 田世隆
Original assignee: Zhongjie Sewing Machine Co Ltd
Current assignee: Zhejiang Zoje Sewing Machine Co Ltd; Zhongjie Sewing Machine Co Ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-11-09
Anticipated expiration: 2031-04-21

Abstract

The utility model provides a feed dog frame adjustment mechanism belongs to sewing machine technical field. It has solved the inconvenient scheduling problem of current work feed dental articulator adjustment operation. This feed dog frame adjustment mechanism installs on sewing machine's casing, wears to be equipped with rotatable regulating spindle including wearing to establish the eccentric shaft on the casing and fixing the mount pad on the casing surface on the mount pad, is fixed with the gear on the regulating spindle, and the drive connection has the rack with gear engagement on the eccentric shaft, and the mount pad is stretched out to the outer end of regulating spindle, and suit and threaded connection have lock nut on the outer end of regulating spindle, and lock nut can screw up and support and lean on the mount pad. The adjusting operation of the feed dog frame adjusting mechanism is convenient.

Description

Feed dog frame adjustment mechanism

Technical Field

The utility model belongs to the technical field of sewing machine, a work feed dental articulator adjustment mechanism is related to.

Background

The sewing machine is a machine for sewing materials through sewing threads, and comprises a needle rod mechanism, a thread take-up mechanism, a feeding mechanism, a thread hooking mechanism, a pressing mechanism, a presser foot lifting mechanism, a lubricating device and the like. The feeding mechanism is also called a cloth feeding mechanism and comprises a cloth feeding tooth, and the cloth feeding tooth performs elliptic motion to realize the conveying function of sewing materials.

Chinese patent document discloses a cloth feeding mechanism with a needle pitch adjusting function [ application number: CN 201610638256.4; the notice number is: CN 106120172U ], a feed dog frame is provided with a tooth lifting slide block chute and a sliding column chute, a tooth lifting slide block is arranged in the tooth lifting slide block chute and can slide in the tooth lifting slide block chute, the tooth lifting slide block is eccentrically sleeved on the main shaft, a tooth lifting adjusting slide block is arranged in the sliding column chute and slides in the sliding column chute, the tooth lifting adjusting slide block is eccentrically sleeved on an eccentric pin, and the eccentric pin is fixed with the machine shell. The eccentric pin is used for adjusting the inclination angle and the lifting height of the feed dog, the angle of the eccentric pin is adjusted to a proper position in advance according to the characteristics of processed cloth, the feed dog frame is made to swing to a proper position, and then the eccentric pin is fixed on the shell by using a set screw.

The eccentric pin is also called an eccentric shaft, the eccentric shaft is fixed through a set screw, namely the set screw is in threaded connection with a threaded hole of the shell, and the end face of the set screw abuts against the outer side face of the eccentric shaft. When the rotation angle of the eccentric shaft needs to be adjusted, the locking screw must be unscrewed first to release the fixed state of the eccentric shaft. While the locking screw is often buried in the threaded hole, a matching screwdriver must be used to unscrew the locking screw. When the operator does not have a matched screwdriver on the hand, the feed dog rack cannot be adjusted, so that the adjustment operation of the feed dog rack adjusting mechanism is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a work feed dental articulator adjustment mechanism, solved the inconvenient technical problem of current work feed dental articulator adjustment operation.

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

the cloth feeding tooth rack adjusting mechanism is installed on a shell of a sewing machine and comprises an eccentric shaft arranged on the shell in a penetrating mode.

When the adjustment operation is needed, the locking nut at the outer end of the adjusting shaft is unscrewed, then the adjusting shaft is rotated to enable the gear to drive the meshed rack to move, so that the eccentric shaft is rotated, and the eccentric shaft drives the cloth feeding tooth frame to swing through the tooth lifting sliding block after being rotated, so that the adjustment of the cloth feeding tooth frame is realized. After the adjustment is finished, the adjusting shaft is held to be fixed, and then the locking nut is screwed tightly to abut against the mounting seat. The adjusting process does not need specific operating tools, and the locking nut is positioned on the outer side of the machine shell and the outer side of the mounting seat, so that the operation is very convenient. Therefore, the adjusting operation of the feed dog frame adjusting mechanism is convenient.

In the above feed dog frame adjusting mechanism, the outer end of the adjusting shaft further extends out of the locking nut, and a convex holding ring is provided on the outer side surface of the outer end of the adjusting shaft. The adjusting shaft is conveniently held through the holding ring, the adjusting shaft is conveniently held for rotation when the adjusting shaft is rotated, and the adjusting shaft is conveniently held for fixation when the adjusting shaft is fixed, so that the adjusting mechanism of the cloth feeding tooth frame is convenient to adjust and operate.

In the above feed dog frame adjusting mechanism, the outer end of the eccentric shaft is eccentrically fixed with the drive pin, the rack is provided with a drive chute matched with the drive pin, and the drive pin is inserted into the drive chute. The cooperation of drive round pin and drive spout can convert the translation of rack into the rotation of eccentric shaft, makes adjustment mechanism move smoothly when adjusting the operation, adjusts the operation reliable and stable and convenient and fast.

In the above feed dog frame adjusting mechanism, a guide seat is further fixed on the outer surface of the casing, a guide groove is formed in the guide seat, and the rack is inserted in the guide groove and can slide along the guide groove. The guide seat has a guiding and positioning function, so that the direction of the rack is accurate when the rack moves, and the adjusting operation is accurate, reliable, convenient and quick.

In the above feed dog frame adjusting mechanism, two guide seats are provided and located at both ends of the rack respectively, and one end of the rack extends out of the guide seats and is connected with the eccentric shaft. The two guide seats have better guiding and positioning functions, so that the adjusting operation is accurate, reliable, convenient and quick.

In the above feed dog frame adjusting mechanism, the outer surface of the housing is provided with the positioning hole, and the inner end of the adjusting shaft is inserted into the positioning hole. The positioning hole has a positioning effect, so that the adjusting shaft is stably installed in the shell and the installation seat, the structure of the feed dog frame adjusting mechanism is stable, and the adjusting operation is accurate, reliable, convenient and quick.

In the above feed dog frame adjusting mechanism, the adjusting shaft is screwed on the mounting seat or in the positioning hole, or a bearing is fixed on the mounting seat, and the adjusting shaft is fixed in the bearing. The adjusting shaft can rotate due to the arrangement, and the locking nut can be screwed down to fix the adjusting shaft on the mounting seat, so that the adjusting operation is convenient.

In the above cloth feeding dental frame adjusting mechanism, the outer side surfaces of the locking nut and the holding ring are provided with anti-slip strips. The anti-slip strip has the anti-slip effect, conveniently grips lock nut and regulating spindle to make and adjust convenient operation.

In the above feed dog frame adjusting mechanism, an indication arrow is provided on the mounting seat, and the rack has scale marks corresponding to the indication arrow, the scale marks being located between the two guide seats. The indication arrow and the scale marks have the marking function, so that the adjustment operation is convenient.

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

the outer surface of the casing is fixedly provided with a mounting seat, the mounting seat is provided with an adjusting shaft, the adjusting shaft is provided with a fixed gear and is in threaded connection with a locking nut, the gear is meshed with a rack, the rack is in transmission connection with an eccentric shaft, and the locking nut is positioned on the outer side of the mounting seat and can be screwed up to abut against the mounting seat, so that the adjusting operation is convenient. The setting of gripping the ring on the regulating spindle sets up between mount pad and the rack and indicates arrow point and scale mark, and the rack passes through guide holder guiding orientation, can both further make and adjust convenient operation.

Drawings

FIG. 1 is a perspective view of the feed dog adjustment mechanism;

FIG. 2 is a disassembled perspective view of the feed dog adjusting mechanism;

FIG. 3 is a perspective view of the present feed dog carrier adjustment mechanism mounted on a housing;

fig. 4 is a sectional view of the feed dog frame adjusting mechanism at the adjusting shaft when mounted on the housing.

In the figure, 1, a housing; 1a, positioning holes; 2. an eccentric shaft; 3. a mounting seat; 3a, indicating an arrow; 4. an adjustment shaft; 4a, a holding ring; 5. a gear; 6. a rack; 6a, a driving chute; 6b, scale marks; 7. a locking nut; 8. a drive pin; 9. a guide seat; 9a, a guide groove; 10. a lifting tooth adjusting slide block; 11. a feed dog frame; 11a and a lifting tooth adjusting chute.

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.

Example one

As shown in fig. 1-4, a feed dog frame adjusting mechanism is installed on a machine shell 1 of a sewing machine, a mounting hole is formed on a shell wall of the machine shell 1, and the outer end of the mounting hole penetrates through the outer surface of the machine shell 1. The feed dog frame adjusting mechanism comprises an eccentric shaft 2 and a mounting seat 3, wherein the eccentric shaft 2 is arranged in a mounting hole in a penetrating mode, and the outer end of the eccentric shaft 2 is located at the outer port of the mounting hole. An avoiding notch is formed in the outer end opening of the mounting hole in the outer surface of the machine shell 1, a clamp spring is sleeved and fixed on the outer end of the eccentric shaft 2 and is located in the avoiding notch and abutted against the bottom surface of the avoiding notch. A clamping groove is formed in the outer side face of the outer end of the eccentric shaft 2, and the clamping spring is clamped in the clamping groove. Eccentric being fixed with on the outer end of eccentric shaft 2 drives round pin 8, having seted up fixed blind hole on the outer terminal surface of eccentric shaft 2, drive round pin 8 inserts fixed blind hole and fixed, drive round pin 8's outer end protrusion on the surface of casing 1. A sealing ring is arranged between the outer side face of the eccentric shaft 2 and the wall face of the mounting hole, a fixing groove is formed in the inner side, located on the clamping groove, of the outer side face of the eccentric shaft 2, and the sealing ring is embedded into the fixing groove and fixed.

On the surface of mount pad 3 fixed connection casing 1, wear to be equipped with rotatable regulating spindle 4 on the mount pad 3, be fixed with gear 5 on the regulating spindle 4, the gear connection has rack 6 with gear 5 meshing on the outer end of eccentric shaft 2. The outer end of the adjusting shaft 4 extends out of the mounting seat 3, the outer end of the adjusting shaft 4 is sleeved with a locking nut 7 in threaded connection, the gear 5 and the locking nut 7 are located on two sides of the mounting seat 3 respectively, and the locking nut 7 can be screwed and abutted against the mounting seat 3. The outer end of the adjustment shaft 4 continues to protrude through the locking nut 7 and the outer side of the outer end of the adjustment shaft 4 has a protruding gripping ring 4 a. Anti-slip strips are arranged on the outer side surfaces of the locking nut 7 and the holding ring 4 a. Preferably, the mount pad 3 is L-shaped, and includes a fixing portion and a connecting portion, the mount pad 3 is fixedly connected at a front left corner of the casing 1, the fixing portion is attached to and fixed on a front side surface of the casing 1, the connecting portion is located on a left side of the casing 1, and an installation space is provided between the connecting portion and the left side surface of the casing 1. The mounting hole on the casing 1 runs through the left side face of the casing 1, and the left side face of the casing 1 is also provided with a positioning hole 1 a. The adjusting shaft 4 is arranged on the connecting part in a penetrating mode, the inner end of the adjusting shaft 4 is inserted into the positioning hole 1a, and the gear 5 is located in the installation space. The adjusting shaft 4 is in threaded connection with the connecting portion or in the positioning hole 1a, or a bearing is fixed on the connecting portion, and the adjusting shaft 4 is fixed in the bearing. The locking nut 7 is located on the left side of the connection portion, and the locking nut 7 abuts on the left side face of the connection portion. In order to facilitate the machining of the thread on the adjusting shaft 4 for the connection with the locking nut 7 and the fixed connection of the gear 5 to the adjusting shaft 4, the adjusting shaft 4 may be provided with a step shaft, i.e. a step may be provided on the adjusting shaft 4 between the position where the locking nut 7 is mounted and the position where the gear 5 is mounted.

The rack 6 is provided with a driving sliding groove 6a matched with the driving pin 8, and the driving pin 8 is inserted into the driving sliding groove 6a and can slide in the driving sliding groove 6 a. A guide seat 9 is further fixed on the outer surface of the machine shell 1, a guide groove 9a is arranged in the guide seat 9, and the rack 6 is arranged in the guide groove 9a in a penetrating manner and can slide along the guide groove 9 a. The guide seats 9 are arranged side by side up and down, the rack 6 extends along the up-down direction, two ends of the rack 6 are respectively arranged in the guide grooves 9a of the two guide seats 9 in a penetrating mode, the driving sliding groove 6a is arranged at the upper end of the rack 6, and the upper end of the rack 6 extends out of the guide seats 9 and is connected with the driving pin 8 on the eccentric shaft 2. An indication arrow 3a is arranged on the mounting seat 3, a scale mark 6b corresponding to the indication arrow 3a is arranged on the outer side surface of the rack 6, and the scale mark 6b is positioned between the two guide seats 9.

The inner end of the eccentric shaft 2 is sleeved with a rotatable feed lifting adjusting slide block 10, a feed delivery tooth rack 11 is provided with a feed lifting adjusting chute 11a, and the feed lifting adjusting slide block 10 is embedded into the feed lifting adjusting chute 11a and can slide in the feed lifting adjusting chute 11 a. The feed dog is arranged on a feed dog frame 11, and the feed dog frame 11 is connected with the main shaft. When the height and the inclination angle of the feed dog are required to be adjusted, the locking nut 7 positioned at the outer end of the adjusting shaft 4 is unscrewed, then the holding ring 4a is held to rotate the adjusting shaft 4 to enable the gear 5 to drive the meshed rack 6 to move up and down, the eccentric shaft 2 is driven to rotate through the driving chute 6a on the rack 6 and the driving pin 8 on the eccentric shaft 2, and the feed dog frame 11 is driven to swing through the feed dog sliding block after the eccentric shaft 2 rotates, so that the adjustment of the feed dog frame 11 is realized. After the adjustment is completed, the holding ring 4a is held to make the adjusting shaft 4 immovable, and then the locking nut 7 is screwed to abut against the mounting base 3. The adjusting process does not need specific operating tools, and the locking nut 7 is positioned at the outer side of the machine shell 1 and the outer side of the mounting seat 3, so that the operation is very convenient. Therefore, the feed dog frame adjusting mechanism has the advantage of convenient adjustment operation.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a feed dog frame adjustment mechanism, installs on sewing machine's casing (1), includes wears to establish eccentric shaft (2) on casing (1), its characterized in that, still including fixing mount pad (3) on casing (1) surface, wear to be equipped with rotatable regulating spindle (4) on mount pad (3), be fixed with gear (5) on regulating spindle (4), transmission connection has rack (6) with gear (5) meshing on eccentric shaft (2), mount pad (3) are stretched out to the outer end of regulating spindle (4), and suit and threaded connection have lock nut (7) on the outer end of regulating spindle (4), lock nut (7) can be screwed up and support and lean on mount pad (3).

2. Feed dog adjustment mechanism according to claim 1, characterized in that the outer end of the adjustment shaft (4) also extends beyond the locking nut (7) and that the outer side of the outer end of the adjustment shaft (4) has a protruding gripping ring (4 a).

3. The feed dog adjusting mechanism according to claim 1, wherein the outer end of the eccentric shaft (2) is eccentrically fixed with a driving pin (8), the rack (6) is provided with a driving chute (6a) matched with the driving pin (8), and the driving pin (8) is inserted into the driving chute (6 a).

4. The feed dog adjusting mechanism according to claim 3, wherein a guide seat (9) is further fixed on the outer surface of the machine shell (1), a guide groove (9a) is formed in the guide seat (9), and the rack (6) is inserted into the guide groove (9a) and can slide along the guide groove (9 a).

5. Feed dog adjustment mechanism according to claim 4, characterized in that the guide seats (9) are two and located at each end of a rack (6), one end of the rack (6) extending out of the guide seats (9) and being connected to the eccentric shaft (2).

6. Feed dog adjustment mechanism according to any of claims 1-5, characterized in that a positioning hole (1a) is provided on the outer surface of the housing (1), the inner end of the adjustment shaft (4) being inserted into the positioning hole (1 a).

7. Feed dog adjustment mechanism according to claim 6, characterized in that the adjustment shaft (4) is screwed on the mounting seat (3) or in the positioning hole (1a), or a bearing is fixed on the mounting seat (3), and the adjustment shaft (4) is fixed in the bearing.

8. Feed dog adjustment mechanism according to claim 5, characterized in that an indication arrow (3a) is provided on the mounting seat (3), that the rack (6) has graduation marks (6b) corresponding to the indication arrow (3a), and that the graduation marks (6b) are located between two guide seats (9).