CN215163664U

CN215163664U - Driving structure for cam of sewing equipment

Info

Publication number: CN215163664U
Application number: CN202023334517.4U
Authority: CN
Inventors: 陈镇杆
Original assignee: Zhejiang Hehe Electromechanical Co ltd
Current assignee: Zhejiang Hehe Electromechanical Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-12-14
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses a drive structure for sewing machine cam, including the cam, set up in the cam groove of a terminal surface or both ends face on the cam, at least one terminal surface of cam in be equipped with two at least bearings be equipped with a bearing core axle of installing corresponding quantity bearing. The utility model discloses be equipped with rather than at least one among them bearing complex inner circle in the cam groove, the cam groove be equipped with at least one bearing complex outer lane, a bearing only with the inner circle cooperation of cam groove, or only cooperate with the outer lane of cam groove. The bearing is only matched with the inner ring or the outer ring in the rotation period of the cam and only needs to rotate towards one direction, so that friction is avoided; and the main stress direction of the same bearing is always the same, the stress direction of the same bearing does not change periodically along with the rotation of the cam, the damage of the bearing can be effectively avoided, and the service life of the bearing or the cam is prolonged. The utility model discloses the structure can be applied to in the aircraft nose of embroidery machine.

Description

Driving structure for cam of sewing equipment

Technical Field

The utility model relates to a drive structure for sewing machine cam.

Background

The cam driving structure of the embroidery machine is widely applied to sewing equipment, a cam groove is formed in a cam, a bearing matched with the cam groove is arranged in the cam groove, and a mandrel of the bearing is usually connected with a connecting rod or a rocker assembly or other transmission structures needing to adapt to the moving track of the cam groove.

Because the cam rotates in a rotation period, the inner ring and the outer ring of the cam groove are matched with the bearing, so that the lifting and descending actions of the corresponding transmission structure are realized. The main force point of the cam groove changes between the inner ring and the outer ring with the rotation. In a rotation period of the cam, when the inner ring is matched with the bearing, the driving bearing rotates towards one direction, when the outer ring is matched with the bearing, the driving bearing rotates towards the other direction, when the inner ring and the outer ring are switched to be matched with the bearing, the inner ring and the outer ring both need to rub against the rotating reverse force of the bearing, so that the temperature of the bearing or the cam is easily overhigh, and the bearing or the cam is damaged.

Meanwhile, the inner ring is matched with the bearing, the driving and pressing directions of the outer ring and the bearing are opposite, the stress direction of the bearing can be changed in a period by the rotating cam, and the stress direction of the bearing is frequently changed and reversely changed due to the high rotating speed of the cam, so that the bearing is easily damaged, and the maintenance cost and the machine failure rate are increased.

Disclosure of Invention

The utility model discloses a solve the problem that current sewing machine cam drive structure exists, provide one kind can eliminate the cam clearance, make the bearing atress in the cam groove even, can prolong sewing machine cam drive structure life's cam drive structure.

The utility model provides a current technical scheme who has the problem be: the utility model provides a drive structure for sewing machine cam, includes the cam, sets up in the cam groove of a terminal surface or both ends face on the cam, as the improvement, at least one terminal surface of cam in be equipped with two at least bearings at least two bearings be equipped with a bearing core axle of installing corresponding quantity bearing, the cam groove use the bearing as the benchmark, the cam groove be equipped with at least one bearing complex inner circle among them, the cam groove be equipped with at least one bearing complex outer lane, a bearing only cooperate with the inner circle of cam groove, or only cooperate with the outer lane of cam groove.

As a further improvement, two end faces of the cam are provided with cam grooves, the cam groove of each end face is provided with an inner ring matched with at least one bearing, each end face cam groove is provided with an outer ring matched with at least one bearing, and one bearing is only matched with the inner ring of the cam groove or only matched with the outer ring of the cam groove.

As a further improvement, two bearings are arranged in the cam groove, the inner ring of the cam groove is matched with one bearing, and the outer ring of the cam groove is matched with the other bearing.

As a further improvement, the inner ring of the cam groove is arranged in a layer corresponding to the bearing on the bearing mandrel, and the corresponding layer of the inner ring is matched with the corresponding matched bearing by taking the matched bearing as a reference.

As a further improvement, the outer ring of the cam groove is matched with a bearing positioned on the inner side of the cam groove, the inner ring of the cam groove is matched with a bearing positioned on the outer side of the cam groove, and the outer ring of the cam groove is positioned at a corresponding position of the bearing matched with the inner ring and is naked.

As a further improvement, the bearing is coaxially arranged on the bearing mandrel.

As a further improvement, the outer ring of the cam groove is correspondingly layered with the bearing on the bearing mandrel, and the corresponding layer of the outer ring is matched with the corresponding matched bearing by taking the matched bearing as a reference.

Compared with the prior art, the utility model, its beneficial effect is with the bearing as the benchmark, be equipped with in the cam groove with wherein at least one bearing complex inner circle, the cam groove be equipped with at least one bearing complex outer lane, a bearing only with the inner circle cooperation of cam groove, or only cooperate with the outer lane of cam groove. The bearing is only matched with the inner ring or the outer ring in the rotation period of the cam and only needs to rotate towards one direction, so that friction is avoided; and the main stress direction of the same bearing is always the same, the stress direction of the same bearing does not change periodically along with the rotation of the cam, the damage of the bearing can be effectively avoided, and the service life of the bearing or the cam is prolonged. The structure of the utility model can be applied to the machine head of an embroidery machine, such as a cam structure of the drive of a needle bar or a presser foot.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the present invention.

Detailed Description

Referring to fig. 1-2, the cam of the present embodiment is an example of an inner cam of an embroidery machine head, and includes a cam 1, a cam groove 2 disposed on one end surface or two end surfaces of the cam 1, at least two bearings disposed in the cam groove 2, and a bearing spindle 3 provided with a corresponding number of bearings, where the bearing spindle 3 may be disposed at a corresponding position in the cam groove 2 as needed. At least two bearings may be coaxially mounted on the same bearing mandrel 3. The bearing mandrel 3 in fig. 1 may be arranged in the cam groove 2 on the left side. Taking the bearing in the cam groove 2 as a reference, the cam groove 2 is provided with an inner ring 21 matched with at least one bearing, the cam groove 2 is provided with an outer ring 22 matched with at least one bearing, and the bearing is only matched with the inner ring 21 of the cam groove 2 or only matched with the outer ring 22 of the cam groove 2. The outer side of the bearing mandrel 3 may be used to connect the connecting rod 4 to accommodate operation of a corresponding mechanism, such as a connecting rod driving a needle bar or a connecting rod of a presser foot to perform a lifting or lowering action.

Of course, the two end faces of the cam can be provided with cam grooves 2, the cam groove 2 of each end face is provided with an inner ring 21 matched with at least one bearing, each end face cam groove 2 is provided with an outer ring 22 matched with at least one bearing, and one bearing is only matched with the inner ring 21 of the cam groove 2 or only matched with the outer ring 22 of the cam groove 2. The bearing mandrel 3 on one end face is connected with a connecting rod for driving the presser foot, and the bearing mandrel 3 on the other end face is connected with the other connecting rod for driving the needle rod.

In order to adapt to most cam structures, in the present embodiment, two bearings are provided inside the cam groove 2, namely, an inner bearing 11 located inside the cam groove 2 and an outer bearing 12 located outside the cam groove 2, an inner ring 21 of the cam groove 2 is engaged with one of the bearings, and an outer ring 22 of the cam groove 2 is engaged with the other bearing. The inner ring 21 of the cam groove 2 is adapted to cooperate with the outer bearing 12 and the outer ring 22 of the cam groove 2 is adapted to cooperate with the inner bearing 11.

Referring to fig. 2, the inner ring 21 of the cam 1 is layered with the corresponding bearing on the bearing mandrel 3, and the corresponding layer of the inner ring 21 is matched with the corresponding matching bearing by taking the matching bearing as a reference. In the above case, the inner layer of the inner ring 21 of the cam groove 2 is fitted to the outer bearing 12 with the outer bearing 12 as a reference, so that the machining accuracy of the cam corresponding portion can be reduced and the machining cost can be reduced. The outer ring 22 of the cam groove 2 is located at the corresponding position of the outer bearing 12 matched with the inner ring 21 and is bare, namely, the axial length of the outer ring 22 is smaller than that of the inner ring 21.

The outer ring 22 of the cam 1 is arranged in a layer corresponding to the bearing on the bearing mandrel 3, and the corresponding layer of the outer ring 22 is matched with the corresponding matched bearing by taking the matched bearing as a reference.

The bearing in this embodiment can be a standard bearing, and can also be a simple bearing, such as a bearing with balls or needles omitted due to the lubrication fit between the inner and outer rings.

Claims

1. The utility model provides a drive structure for sewing machine cam, includes the cam, sets up the cam groove of an terminal surface or both ends face on the cam, its characterized in that: the cam at least one terminal surface on the cam in be equipped with two at least bearings be equipped with a bearing dabber of the corresponding quantity bearing of installation, the cam groove use the bearing as the benchmark, the cam groove be equipped with wherein at least one bearing complex inner circle, the cam groove be equipped with at least one bearing complex outer lane, a bearing only cooperate with the inner circle of cam groove, or only cooperate with the outer lane of cam groove.

2. The driving structure for a cam of a sewing machine according to claim 1, wherein: cam both ends face be equipped with the cam groove, the cam groove of each terminal surface be equipped with wherein at least one bearing complex inner circle, each terminal surface cam groove be equipped with at least one bearing complex outer lane, a bearing only with the inner circle cooperation of cam groove, or only cooperate with the outer lane of cam groove.

3. The driving structure for a cam of a sewing machine according to claim 1 or 2, wherein: the cam groove in be equipped with two bearings, the inner circle of cam groove cooperate with one of them bearing, the outer lane of cam groove cooperate with another bearing.

4. The driving structure for a cam of a sewing machine according to claim 3, wherein: the inner ring of the cam groove is arranged in a layer corresponding to the bearing on the bearing mandrel, and the corresponding layer of the inner ring is matched with the corresponding matched bearing by taking the matched bearing as a reference.

5. The driving structure for a cam of a sewing machine according to claim 4, wherein: the cam groove outer lane cooperate with the bearing that is located the cam groove inboard, the cam groove inner circle cooperate with the bearing that is located the cam groove outside, the outer lane of cam groove be located with inner circle matched with bearing correspondence department naked empty.

6. The driving structure for a cam of a sewing machine according to claim 5, wherein: the bearing is coaxially arranged on the bearing mandrel.

7. The driving structure for a cam of a sewing machine according to claim 3, wherein: the outer ring of the cam groove is arranged in a layer corresponding to the bearing on the bearing mandrel, and the corresponding layer of the outer ring is matched with the corresponding matched bearing by taking the matched bearing as a reference.

8. The driving structure for a cam of a sewing machine according to claim 7, wherein: the bearing is coaxially arranged on the bearing mandrel.