CN213925374U

CN213925374U - Needle bar cam dynamic balancing device for computer embroidery machine

Info

Publication number: CN213925374U
Application number: CN202022883575.6U
Authority: CN
Inventors: 赵丽萍; 杨文荣; 刘春华; 郭杰
Original assignee: Hangzhou Huazhicheng Textile Co ltd
Current assignee: Hangzhou Huazhicheng Textile Co ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-08-10
Anticipated expiration: 2030-12-04

Abstract

The utility model discloses a needle bar cam dynamic balance device for computerized embroidery machine, concretely relates to computerized embroidery machine subassembly technical field, including eccentric connecting rod bearing and needle bar transmission cam, needle bar transmission cam sets up the inside at eccentric connecting rod bearing, be provided with the roll antifriction structure between eccentric connecting rod bearing's the inside wall and the lateral wall of needle bar transmission cam, eccentric connecting rod bearing's rear end is provided with the axle bed. The utility model discloses a be provided with spacing, flange, through-hole, locking bolt, lock nut and spacing groove, when using, insert the inside in shaft hole with the pivot, spacing inserts in the inside of spacing groove this moment, can play limiting displacement when rotating, then passes through flange with the one end of pivot and the one end of motor output shaft and is connected to lock through locking bolt and lock nut, can accomplish the transmission of motor power like this, and stability is higher moreover, and it is very convenient to use.

Description

Needle bar cam dynamic balancing device for computer embroidery machine

Technical Field

The utility model relates to a computerized embroidery machine subassembly technical field specifically is a needle bar cam dynamic balance device for computerized embroidery machine.

Background

With the continuous development and progress of science and technology, the embroidery mode is developed from the former manual work to the present mechanical automation, the labor force is liberated, the operation efficiency is greatly improved, and some computer embroidery machines adopt an eccentric shaft to realize dynamic balance in a needle bar cam mechanism, but the existing needle bar cam dynamic balance device for the computer embroidery machine has some problems and defects.

In the process of implementing the present invention, the inventor finds that at least the following problems exist in the prior art and are not solved:

(1) the traditional needle bar cam dynamic balancing device for the computerized embroidery machine cannot adjust the size of the balancing weight according to the use requirement, and has poor applicability;

(2) the traditional needle bar cam dynamic balancing device for the computerized embroidery machine is inconvenient for connecting a rotating shaft with an output shaft of a motor and is very inconvenient to use;

(3) the traditional needle bar cam dynamic balance device for the computerized embroidery machine is easy to generate heat in a long-time rotating process, and the service life of the device is shortened.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a needle bar cam dynamic balance device for computerized embroidery machine to propose the size that can not adjust the balancing weight according to the needs that use in solving above-mentioned background art, the relatively poor problem of suitability.

In order to achieve the above object, the utility model provides a following technical scheme: a needle bar cam dynamic balancing device for a computerized embroidery machine comprises an eccentric connecting rod bearing and a needle bar transmission cam, wherein the needle bar transmission cam is arranged inside the eccentric connecting rod bearing, a rolling friction reducing structure is arranged between the inner side wall of the eccentric connecting rod bearing and the outer side wall of the needle bar transmission cam, the rear end of the eccentric connecting rod bearing is provided with a shaft seat, the front end of the needle bar transmission cam is provided with a take-up lever drive cam cover plate, the top of the take-up lever drive cam cover plate is fixedly connected with a curved surface block, shaft holes are formed inside the shaft seat, the take-up lever drive cam cover plate and the needle bar transmission cam, a rotating shaft penetrates through the shaft holes, one end of the rotating shaft is provided with a power connection structure, threaded holes are formed inside the two sides of the take-up lever drive cam cover plate, weight reducing grooves are formed inside the two sides of the bottom end of the take-up lever drive cam cover plate, the top of the curved surface block is provided with a structure convenient for counterweight adjustment;

the structure is adjusted to counter weight of being convenient for includes the caulking groove, the caulking groove sets up the rear end at curved surface piece top, the inside embedding of caulking groove has the balancing weight, the inside both sides of caulking groove are provided with the joint groove, the both sides fixedly connected with joint piece of balancing weight.

Preferably, the outer diameter of the clamping block is smaller than the inner diameter of the clamping groove, and a clamping structure is formed between the clamping block and the clamping groove.

Preferably, the power connection structure of being convenient for comprises spacing, flange, through-hole, locking bolt, lock nut and spacing groove, spacing fixed connection is in the one end of pivot one side, flange fixed connection is in the rear end of pivot, the last multiunit through-hole that is provided with of flange, the inside of through-hole is run through there are multiunit locking bolt, the outside one side of locking bolt is provided with lock nut, the spacing groove sets up the inside in the shaft hole.

Preferably, the through holes are annularly distributed on the connecting flange, and the limiting strip is inserted in the limiting groove.

Preferably, the rolling friction reducing structure comprises an eccentric bearing inner ring, rolling grooves, balls and a track, the eccentric bearing inner ring is fixedly connected to the inner side wall of the eccentric connecting rod bearing, a plurality of groups of rolling grooves are formed in the inner side wall of the eccentric bearing inner ring, the balls are arranged in the rolling grooves, and the track is fixedly connected to the outer side wall of the needle rod transmission cam.

Preferably, the other end of the ball penetrates through the inside of the track, and the rolling grooves are arranged on the inner side wall of the inner ring of the eccentric bearing at equal intervals.

Compared with the prior art, the beneficial effects of the utility model are that: the needle bar cam dynamic balancing device for the computerized embroidery machine not only realizes that the size of the balancing weight can be adjusted according to the use requirement, has strong applicability, realizes the convenient connection of the rotating shaft and the output shaft of the motor, is very convenient to use, but also realizes the internal part which is not easy to generate heat in the long-time rotating process, and prolongs the service life of the device;

(1) the convenient counterweight adjusting structure comprises the caulking groove which is arranged at the rear end of the top of the curved surface block, the counterweight block is embedded in the caulking groove, the clamping grooves are formed in two sides of the inner part of the caulking groove, and the clamping blocks are fixedly connected to two sides of the counterweight block;

(2) by arranging the limiting strip, the connecting flange, the through hole, the locking bolt, the locking nut and the limiting groove, when the electric motor is used, the rotating shaft is inserted into the shaft hole, the limiting strip is inserted into the limiting groove at the moment, the limiting effect can be achieved when the electric motor rotates, then one end of the rotating shaft is connected with one end of the output shaft of the motor through the connecting flange and locked through the locking bolt and the locking nut, so that the transmission of the power of the motor can be completed, the stability is high, and the electric motor is very convenient to use;

(3) through being provided with eccentric bearing inner race, slot rolling, ball and track, when using, needle bar transmission cam is at the inside pivoted in-process of eccentric connecting rod bearing, and the inside wall of eccentric connecting rod bearing passes through the inside wall rolling connection contact of ball with needle bar transmission cam, can not produce the friction like this in its junction, so can not produce the heat to guarantee that the device is difficult to appear damaging under long-time operating condition, improve the device's life.

Drawings

Fig. 1 is a schematic front view of a cross-sectional structure of the present invention;

FIG. 2 is a schematic side view of the cross-sectional structure of the rotating shaft of the present invention;

fig. 3 is an enlarged partial sectional view of the utility model at a in fig. 1;

fig. 4 is an enlarged structural schematic view of the take-up lever driving cam cover plate of the present invention.

In the figure: 1. an eccentric link bearing; 2. a threaded hole; 3. a curved surface block; 4. a shaft seat; 5. caulking grooves; 6. a rotating shaft; 7. a balancing weight; 8. a shaft hole; 9. the take-up lever drives the cam cover plate; 10. a needle bar drive cam; 11. the power connection structure is convenient; 1101. a limiting strip; 1102. a connecting flange; 1103. a through hole; 1104. locking the bolt; 1105. locking the nut; 1106. a limiting groove; 12. a rolling friction reducing structure; 1201. an eccentric bearing inner race; 1202. rolling a groove; 1203. a ball bearing; 1204. a track; 13. a weight reduction groove; 14. a clamping groove; 15. and a clamping block.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1-4, a needle bar cam dynamic balancing device for a computerized embroidery machine includes an eccentric link bearing 1 and a needle bar transmission cam 10, the needle bar transmission cam 10 is disposed inside the eccentric link bearing 1, a rolling friction reducing structure 12 is disposed between an inner sidewall of the eccentric link bearing 1 and an outer sidewall of the needle bar transmission cam 10, a shaft seat 4 is disposed at a rear end of the eccentric link bearing 1, a thread take-up lever driving cam cover plate 9 is disposed at a front end of the needle bar transmission cam 10, a curved block 3 is fixedly connected to a top of the thread take-up lever driving cam cover plate 9, shaft holes 8 are disposed inside the shaft seat 4, the thread take-up lever driving cam cover plate 9 and the needle bar transmission cam 10, a rotating shaft 6 penetrates through the shaft holes 8, a power connection structure 11 is disposed at one end of the rotating shaft 6, threaded holes 2 are disposed inside two sides of the thread take-up lever driving cam cover plate 9, weight reducing grooves 13 are disposed inside, the top of the curved surface block 3 is provided with a structure convenient for adjusting the balance weight;

referring to fig. 1-4, the needle bar cam dynamic balancing device for the computerized embroidery machine further comprises a convenient counterweight adjusting structure, the convenient counterweight adjusting structure comprises an caulking groove 5, the caulking groove 5 is arranged at the rear end of the top of the curved block 3, a balancing weight 7 is embedded in the caulking groove 5, clamping grooves 14 are arranged at two sides of the inside of the caulking groove 5, and clamping blocks 15 are fixedly connected to two sides of the balancing weight 7;

the outer diameter of the clamping block 15 is smaller than the inner diameter of the clamping groove 14, and a clamping structure is formed between the clamping block 15 and the clamping groove 14;

specifically, as shown in fig. 1 and 4, when using, inlay the inside at caulking groove 5 with balancing weight 7, and make 15 joints of joint piece in the inside of joint groove 14, if need change balancing weight 7 like this, only need pry balancing weight 7, make joint piece 15 take out can pull down balancing weight 7 from 14 inside joint grooves, then more change different length balancing weight 7 can, just so realized can adjust the size of balancing weight 7 according to the needs that use, the suitability is stronger.

Example 2: the power connection structure 11 consists of a limiting strip 1101, a connecting flange 1102, a through hole 1103, a locking bolt 1104, a locking nut 1105 and a limiting groove 1106, wherein the limiting strip 1101 is fixedly connected to one end of one side of the rotating shaft 6, the connecting flange 1102 is fixedly connected to the rear end of the rotating shaft 6, the connecting flange 1102 is provided with a plurality of groups of through holes 1103, a plurality of groups of locking bolts 1104 penetrate through the through holes 1103, the locking nut 1105 is arranged on one side of the outer part of the locking bolt 1104, and the limiting groove 1106 is arranged inside the shaft hole 8;

the through holes 1103 are annularly distributed on the connecting flange 1102, and the limiting strip 1101 is inserted into the limiting groove 1106;

specifically, as shown in fig. 1 and fig. 2, when in use, the rotating shaft 6 is inserted into the shaft hole 8, the limiting strip 1101 is inserted into the limiting groove 1106, and can play a limiting role during rotation, then one end of the rotating shaft 6 is connected with one end of the output shaft of the motor through the connecting flange 1102 and locked through the locking bolt 1104 and the locking nut 1105, so that the transmission of the power of the motor can be completed, and the stability is high, and the use is very convenient.

Example 3: the rolling friction reducing structure 12 is composed of an eccentric bearing inner ring 1201, rolling grooves 1202, balls 1203 and a track 1204, the eccentric bearing inner ring 1201 is fixedly connected to the inner side wall of the eccentric connecting rod bearing 1, a plurality of groups of rolling grooves 1202 are arranged on the inner side wall of the eccentric bearing inner ring 1201, the balls 1203 are arranged inside the rolling grooves 1202, and the track 1204 is fixedly connected to the outer side wall of the needle rod transmission cam 10;

the other end of the ball 1203 penetrates the inside of the track 1204, and the rolling grooves 1202 are arranged on the inner side wall of the inner ring 1201 of the eccentric bearing at equal intervals;

specifically, as shown in fig. 1 and 3, when the needle bar transmission cam 10 rotates inside the eccentric link bearing 1, the inner side wall of the eccentric link bearing 1 is in rolling connection contact with the inner side wall of the needle bar transmission cam 10 through the ball 1203, so that friction is not generated at the connection position, heat is not generated, the device is not easy to damage under a long-time working state, and the service life of the device is prolonged.

The working principle is as follows: the utility model discloses when using, at first, inlay the inside at caulking groove 5 with balancing weight 7 to make 15 joints of joint piece in the inside of joint groove 14, if need change balancing weight 7 like this, only need sled balancing weight 7, make joint piece 15 can pull down balancing weight 7 from the inside of joint groove 14 being taken out, then more change different length balancing weight 7 can, just so realized can adjust the size of balancing weight 7 according to the needs that use, the suitability is stronger.

Afterwards, when using, insert pivot 6 inside shaft hole 8, spacing 1101 is inserted in the inside of spacing groove 1106 this moment, can play limiting displacement when rotating, then pass through flange 1102 with the one end of pivot 6 and the one end of motor output shaft and be connected to lock through lock bolt 1104 and lock nut 1105, can accomplish the transmission of motor power like this, and stability is higher moreover, and it is very convenient to use.

Finally, when the needle bar transmission cam 10 is used, in the process of rotating inside the eccentric connecting rod bearing 1, the inner side wall of the eccentric connecting rod bearing 1 is in rolling connection contact with the inner side wall of the needle bar transmission cam 10 through the ball 1203, so that friction cannot be generated at the joint of the inner side wall and the inner side wall, heat cannot be generated, the device is not prone to damage in a long-time working state, and the service life of the device is prolonged.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A needle bar cam dynamic balance device for computerized embroidery machine, including eccentric connecting rod bearing (1) and needle bar transmission cam (10), its characterized in that: the needle bar transmission cam (10) is arranged inside the eccentric connecting rod bearing (1), a rolling friction reducing structure (12) is arranged between the inner side wall of the eccentric connecting rod bearing (1) and the outer side wall of the needle bar transmission cam (10), an axle seat (4) is arranged at the rear end of the eccentric connecting rod bearing (1), a take-up lever driving cam cover plate (9) is arranged at the front end of the needle bar transmission cam (10), a curved surface block (3) is fixedly connected to the top of the take-up lever driving cam cover plate (9), an axle hole (8) is arranged inside the axle seat (4), the take-up lever driving cam cover plate (9) and the needle bar transmission cam (10), a rotating shaft (6) penetrates through the axle hole (8), a power connection structure (11) is arranged at one end of the rotating shaft (6), and threaded holes (2) are arranged inside two sides of the take-up lever driving cam cover plate (9), weight reduction grooves (13) are formed in the inner parts of two sides of the bottom end of the take-up lever driving cam cover plate (9), and a structure convenient for balance weight adjustment is arranged at the top of the curved surface block (3);

structure is adjusted to counter weight of being convenient for includes caulking groove (5), caulking groove (5) set up the rear end at curved surface piece (3) top, the inside embedding of caulking groove (5) has balancing weight (7), the inside both sides of caulking groove (5) are provided with joint groove (14), both sides fixedly connected with joint piece (15) of balancing weight (7).

2. The needle bar cam dynamic balancing apparatus for a computerized embroidery machine of claim 1, wherein: the outer diameter of the clamping block (15) is smaller than the inner diameter of the clamping groove (14), and a clamping structure is formed between the clamping block (15) and the clamping groove (14).

3. The needle bar cam dynamic balancing apparatus for a computerized embroidery machine of claim 1, wherein: convenient to power connection structure (11) comprises spacing strip (1101), flange (1102), through-hole (1103), locking bolt (1104), lock nut (1105) and spacing groove (1106), spacing strip (1101) fixed connection is in the one end of pivot (6) one side, flange (1102) fixed connection is in the rear end of pivot (6), be provided with multiunit through-hole (1103) on flange (1102), multiunit locking bolt (1104) has been run through to the inside of through-hole (1103), one side of locking bolt (1104) outside is provided with lock nut (1105), spacing groove (1106) sets up the inside in shaft hole (8).

4. The needle bar cam dynamic balancing apparatus for computerized embroidery machine of claim 3, wherein: the through holes (1103) are distributed on the connecting flange (1102) in an annular shape, and the limiting strip (1101) is inserted into the limiting groove (1106).

5. The needle bar cam dynamic balancing apparatus for a computerized embroidery machine of claim 1, wherein: the rolling friction reducing structure (12) is composed of an eccentric bearing inner ring (1201), rolling grooves (1202), balls (1203) and a track (1204), the eccentric bearing inner ring (1201) is fixedly connected to the inner side wall of the eccentric connecting rod bearing (1), a plurality of groups of rolling grooves (1202) are formed in the inner side wall of the eccentric bearing inner ring (1201), the balls (1203) are arranged inside the rolling grooves (1202), and the track (1204) is fixedly connected to the outer side wall of the needle rod transmission cam (10).

6. The needle bar cam dynamic balancing apparatus for computerized embroidery machine of claim 5, wherein: the other end of the ball (1203) penetrates through the track (1204), and the rolling grooves (1202) are arranged on the inner side wall of the inner ring (1201) of the eccentric bearing at equal intervals.