CN219137122U

CN219137122U - Automatic oil supply device for rotating shuttle of sewing machine

Info

Publication number: CN219137122U
Application number: CN202223427059.8U
Authority: CN
Inventors: 陈初喜
Original assignee: Supreme Intelligent Technology Co Ltd
Current assignee: Supreme Intelligent Technology Co Ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-06-06
Anticipated expiration: 2032-12-21

Abstract

The utility model discloses an automatic oil supply device of a rotating shuttle of a sewing machine, which comprises a plunger pump and a driving shaft, wherein the plunger pump is provided with a through hole; the driving shaft is provided with a first shaft part and a second shaft part, and the second shaft part is rotatably arranged in the through hole; the cross section of the second shaft part is provided with a first shaft wall coaxial with the driving shaft and a second shaft wall eccentrically arranged relative to the axis of the driving shaft, and a crescent pump cavity is formed between the second shaft wall and the through hole wall; the plunger pump is provided with an oil outlet mounting part communicated with the oil outlet, and an adjusting bolt capable of adjusting the oil outlet is arranged in the oil outlet mounting part; the oil outlet mounting part is provided with an oil outlet head connected with an oil supply pipe. According to the utility model, through rotating the adjusting bolt, the oil outlet quantity of the oil outlet head on the oil outlet installation part can be accurately adjusted, and redundant oil in the pump cavity can flow back to the oil tank through the oil return hole.

Description

Automatic oil supply device for rotating shuttle of sewing machine

Technical Field

The utility model relates to the technical field of sewing machines, in particular to an automatic oil supply device for a rotating shuttle of a sewing machine.

Background

The utility model provides a self-oil supply structure of sewing machine rotating shuttle of patent No. 201921540246.2, including seting up radial hole on the axle sleeve of rotating shuttle axle, radial downthehole elastic plunger that sets up, radial hole's of rotating shuttle axle correspondence hole position is opened and is provided with the eccentric groove, the eccentric groove forms a simple and easy plunger pump with the elastic plunger cooperation, rotating shuttle axle is rotatory synchronous with the frequency of plunger, the frequency of plunger accelerates when the rotational speed, can increase the fuel feeding like this, when rotating shuttle axle rotational speed slows down, the frequency of plunger slows down, thereby reduce the fuel feeding, thereby solve the unable dynamic adjustment's of current structure fuel feeding volume problem. The patent disclosure has certain drawbacks, such as the inability to accurately control the amount of oil flowing into the rotating shuttle, excessive oil supply, and excessive oil supply, which may cause increased wear.

Disclosure of Invention

The utility model aims at the prior art and provides an automatic oil supply device of a rotating shuttle of a sewing machine, which can accurately control the oil supply quantity through an adjusting bolt according to the oil quantity requirement of the rotating shuttle.

The technical scheme adopted for solving the technical problems is as follows: an automatic oil supply device of a rotating shuttle of a sewing machine comprises a plunger pump and a driving shaft, wherein the plunger pump is provided with a through hole; the driving shaft is provided with a first shaft part and a second shaft part, and the second shaft part is rotatably arranged in the through hole; the cross section of the second shaft part is provided with a first shaft wall coaxial with the driving shaft and a second shaft wall eccentrically arranged relative to the axis of the driving shaft, and a crescent pump cavity is formed between the second shaft wall and the through hole wall; the plunger pump is provided with an oil outlet mounting part communicated with the oil outlet, and an adjusting bolt capable of adjusting the oil outlet is arranged in the oil outlet mounting part; the oil outlet mounting part is provided with an oil outlet head connected with an oil supply pipe.

In order to optimize the technical scheme, the utility model further comprises the following improved technical scheme.

The plunger pump is fixed on the mounting seat, and the first shaft part is rotatably mounted in the mounting seat.

The driving shaft rotates synchronously with the lower shaft of the sewing machine through the transmission assembly.

The length of the arc surface between the oil inlet hole and the oil return hole is larger than the length of the pump cavity; the length of the arc surface between the oil return hole and the oil outlet hole is smaller than the length of the pump cavity.

The plunger pump is provided with the oil inlet head, the oil inlet channel inside the oil inlet head is communicated with the oil inlet hole, and the oil inlet head is communicated with the oil tank through the oil pipe.

The plunger pump is provided with an oil return head, and an oil return channel in the oil return head is communicated with the oil return hole; the oil return head is communicated with the oil tank through an oil pipe.

The oil outlet installation part is provided with an oil outlet channel communicated with the oil outlet hole, an adjusting hole is formed in the wall of the oil outlet channel, the adjusting bolt is provided with an adjusting part with a gradually-increased radius, and the adjusting part is positioned in the adjusting hole.

The plunger pump is provided with the plunger installation part protruding outwards, the middle part of the plunger installation part is provided with the plunger cavity, the plunger cavity is internally provided with the plunger capable of axially moving, the rear part of the plunger is connected with the spring installation seat through the spring, and the front end of the plunger is in abutting fit with the surface of the second shaft part.

Compared with the prior art, the automatic oil supply device is characterized in that the plunger pump is provided with an oil inlet hole, an oil return hole and an oil outlet hole. Through rotating adjusting bolt, can accurately adjust the play oil yield of play oil head on the oil installation department, unnecessary fluid in the pump chamber can flow back to the oil tank through the oil gallery.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present utility model.

Fig. 2 is a schematic perspective view of an oil supply mechanism.

Fig. 3 is a schematic cross-sectional view of the present utility model.

Fig. 4 is a schematic cross-sectional view of the oil.

Fig. 5 is a schematic cross-sectional view of the oil intake.

Fig. 6 is a schematic cross-sectional view of the oil return.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings.

Fig. 1 to 6 are schematic structural views of the present utility model.

Wherein the reference numerals are as follows: the sewing machine comprises a sewing machine seat 1, a driving shaft 2, a first shaft part 2a, a second shaft part 2b, a first shaft wall 2c, a second shaft wall 2d, a mounting seat 3, a plunger pump 4, a pump cavity 5, an oil inlet hole 6, an oil return hole 7, an oil outlet mounting part 8, an oil outlet hole 9, a plug 10, an adjusting bolt 11, an adjusting part 11a, an adjusting hole 12, a threaded section 12a, an oil outlet section 12b, an adjusting section 12c, an oil outlet head 13, a plunger mounting part 14, a spring mounting seat 15, a spring 16, a plunger 17, an oil inlet head 18, an oil return head 19, an oil inlet channel 20, an oil return channel 21, an oil outlet channel 22, a plunger cavity 23 and a rotating shuttle 24.

The sewing machine comprises a sewing machine seat 1, wherein a main shaft and a lower shaft which can rotate are arranged on the sewing machine seat 1, the main shaft is driven to rotate by a driving motor, and the main shaft and the lower shaft synchronously rotate by a synchronous belt. The front end of the lower shaft is provided with a rotating shuttle 24, and when the rotating shuttle 24 works, the middle part of the lower shaft drives an automatic oil supply device to supply oil to the rotating shuttle 24 through a transmission component, and the transmission component can be a synchronous belt or a gear.

The automatic oil supply device comprises a mounting seat 3 fixedly arranged on a sewing machine seat 1 and a driving shaft 2 rotatably arranged in the middle of the mounting seat 3. The drive shaft 2 is formed with a first shaft portion 2a and a second shaft portion 2b, and the first shaft portion 2a is rotatably connected to the mount 3. The front end of the mounting seat 3 is fixedly provided with a plunger pump 4, a circular through hole is formed in the middle of the plunger pump 4, and the second shaft part 2b can be rotatably arranged in the through hole.

The second shaft portion 2b has a first shaft wall 2c concentric with the drive shaft 2 and a second shaft wall 2d eccentrically disposed with respect to the axial center of the drive shaft 2 in cross section. A crescent pump chamber 5 is formed between the second shaft wall 2d and the through-hole wall. When the drive shaft 2 rotates relative to the plunger pump 4, the pump chamber 5 can synchronously rotate around the axis of the drive shaft 2.

The inner wall of the through hole is provided with an oil inlet hole 6, an oil return hole 7 and an oil outlet hole 9. The length of the arc surface between the oil inlet hole 6 and the oil return hole 7 is larger than the length of the pump cavity 5, and the oil inlet hole 6 and the oil return hole 7 cannot be covered at the same time when the pump cavity 5 moves. The length of the arc surface between the oil return hole 7 and the oil outlet hole 9 is smaller than the length of the pump cavity 5, and the oil return hole 7 and the oil outlet hole 9 can be covered simultaneously when the pump cavity 5 moves.

The circumferential surface of the plunger pump 4 is provided with an oil inlet passage 20 connected with the oil inlet hole 6 and an oil return passage 21 connected with the oil return hole 7. The outer end of the oil inlet passage 20 is provided with an oil inlet head 18, and the oil inlet head 18 is connected with an oil tank through a pipe. The outer end of the oil return channel 21 is provided with an oil return head 19, and lubricating oil flows back into the oil tank through the oil return head 19 and a pipe.

An oil outlet mounting part 8 protruding outwards is formed on the circumferential surface of the plunger pump 4, and an oil outlet passage 22 communicated with the oil outlet 9 is formed in the middle of the oil outlet mounting part 8. The outer end of the oil outlet passage 22 is provided with a plug 10. The wall of the oil outlet channel 22 is provided with an adjusting hole 12, an adjusting bolt 11 is arranged in the adjusting hole 12, and the adjusting bolt 11 and the oil outlet channel 22 are vertically arranged. The lower end of the adjusting bolt 11 has an adjusting portion 11a with a gradually increasing radius from bottom to top, and the middle has a threaded portion.

The adjusting hole 12 has three sections, the upper section is a threaded section 12a matched with the threaded portion, and the adjusting bolt 11 is rotated to drive the adjusting portion 11a to axially move. The middle section is an oil outlet section 12b, the inner diameter of the oil outlet section 12b is larger than the maximum diameter of the adjusting part 11a, and lubricating oil flows through a gap between the oil outlet section 12b and the adjusting part 11 a. The oil outlet section 12b is provided with an oil outlet head 13 connected with an oil supply pipe, and lubricating oil is conveyed to the rotating shuttle 24 through the oil outlet head 13 to lubricate the rotating shuttle 24. The lower section is an adjusting section 12c matched with the adjusting part 11a, and the radius of the adjusting part 11a is gradually increased from bottom to top, and the adjusting part 11a is driven to axially move by rotating the adjusting bolt 11, so that a gap between the adjusting part 11a and the adjusting section 12c is controlled to adjust the oil quantity flowing out of the oil outlet head 13.

The peripheral surface of the plunger pump 4 is also provided with a plunger mounting part 14 protruding outwards, and the middle part of the plunger mounting part 14 is provided with a plunger cavity 23. A plunger 17 capable of moving axially is arranged in the plunger cavity 23, and the rear part of the plunger 17 is connected with the spring mounting seat 15 through a spring 16. The spring mount 15 is fixedly connected to the plunger mount 14. The front end of the plunger 17 always abuts against the second shaft portion 2b by the spring 16.

When the pump chamber 5 moves to the spring plunger, the plunger 17 is pressed against the second shaft wall 2d by the spring 16, and as the drive shaft 2 rotates, the plunger 17 moves from the second shaft wall 2d to the first shaft wall 2c of the drive shaft 2, and a negative pressure is formed in the pump chamber 5. When the pump chamber 5 moves to the oil inlet hole 6, lubricating oil is sucked into the pump chamber 5 from the oil inlet head 18 due to negative pressure formed in the pump chamber 5.

Before the oil supply device works, according to the oil quantity requirement of the rotating shuttle 24, the adjusting bolt 11 is manually rotated to drive the adjusting part 11a at the lower end of the adjusting bolt 11 to move up and down, and the gap between the adjusting part 11a and the adjusting section 12c is adjusted, so that the oil quantity flowing out of the oil outlet head 13 is controlled. When the rotating shuttle 24 of the sewing machine works, the oil supply device is driven to synchronously work so as to drive the driving shaft 2 to rotate. As shown in fig. 4, when the pump chamber 5 is rotated to the oil inlet 6, the plunger 17 moves from the second shaft wall 2d to the first shaft wall 2c of the drive shaft 2, and since the entire plunger pump 4 is sealed, the plunger 17 moves inward along the plunger chamber 23 to form a negative pressure in the pump chamber 5. The lubrication oil is sucked into the pump chamber 5 from the oil inlet head 18 due to the negative pressure in the pump chamber 5. The drive shaft 2 is then rotated clockwise, the pump chamber 5 is first rotated to the oil return hole 7, and a part of the lubricating oil flows back into the oil tank through the oil return passage 21 and the oil return head 19. Then the driving shaft 2 continues to rotate, the pump cavity 5 rotates to the oil outlet hole 9, at this time, the pump cavity 5 simultaneously covers the oil return hole 7 and the oil outlet hole 9 as shown in fig. 5, the lubricating oil can simultaneously flow into the oil return passage 21 and the oil outlet passage 22, and the lubricating oil flowing into the oil outlet passage 22 flows out from the oil outlet head 13 and is sent to the rotating shuttle 24. The drive shaft 2 then continues to rotate and the pump chamber 5 rotates to the spring plunger, at which time the pump chamber 5 covers both the spring plunger and the oil outlet 9 as shown in fig. 6, and the plunger 17 is pressed against the recess under the action of the spring 16, forcing the oil in the pump chamber 5 into the oil outlet channel 22.

The preferred embodiments of this utility model have been described so far that various changes or modifications may be made by one of ordinary skill in the art without departing from the scope of this utility model.

Claims

1. An automatic oil supply device for a rotating shuttle of a sewing machine comprises a plunger pump (4) and a driving shaft (2), and is characterized in that: the plunger pump (4) is provided with a through hole; the driving shaft (2) is provided with a first shaft part (2 a) and a second shaft part (2 b), and the second shaft part (2 b) is rotatably arranged in the through hole; the cross section of the second shaft part (2 b) is provided with a first shaft wall (2 c) concentric with the driving shaft (2) and a second shaft wall (2 d) eccentrically arranged relative to the axis of the driving shaft (2), and a crescent pump cavity (5) is formed between the second shaft wall (2 d) and the through hole wall; an oil inlet hole (6), an oil return hole (7) and an oil outlet hole (9) are formed in the inner wall of the through hole, the plunger pump (4) is provided with an oil outlet mounting part (8) communicated with the oil outlet hole (9), and an adjusting bolt (11) capable of adjusting the oil outlet amount is arranged in the oil outlet mounting part (8); an oil outlet head (13) connected with an oil supply pipe is arranged on the oil outlet installation part (8).

2. The automatic oil supply device according to claim 1, characterized in that: the plunger pump (4) is fixed on the mounting seat (3), and the first shaft part (2 a) is rotatably mounted in the mounting seat (3).

3. The automatic oil supply device according to claim 1, characterized in that: the driving shaft (2) rotates synchronously with the lower shaft of the sewing machine through a transmission assembly.

4. The automatic oil supply device according to claim 1, characterized in that: the length of the arc surface between the oil inlet hole (6) and the oil return hole (7) is greater than the length of the pump cavity (5); the length of the arc surface between the oil return hole (7) and the oil outlet hole (9) is smaller than the length of the pump cavity (5).

5. The automatic oil supply device according to claim 1, characterized in that: the plunger pump (4) is provided with an oil inlet head (18), an oil inlet channel (20) in the oil inlet head (18) is communicated with the oil inlet hole (6), and the oil inlet head (18) is communicated with an oil tank through an oil pipe.

6. The automatic oil supply device according to claim 1, characterized in that: the plunger pump (4) is provided with an oil return head (19), and an oil return channel (21) in the oil return head (19) is communicated with the oil return hole (7); the oil return head (19) is communicated with the oil tank through an oil pipe.

7. The automatic oil supply device according to claim 1, characterized in that: the oil outlet installation part (8) is provided with an oil outlet channel (22) communicated with the oil outlet hole (9), an adjusting hole (12) is formed in the wall of the oil outlet channel (22), the adjusting bolt (11) is provided with an adjusting part (11 a) with a section of gradually increased radius, and the adjusting part (11 a) is positioned in the adjusting hole (12).

8. The automatic oil supply device according to claim 1, characterized in that: the plunger pump (4) is provided with a plunger installation part (14) protruding outwards, a plunger cavity (23) is formed in the middle of the plunger installation part (14), a plunger (17) capable of axially moving is arranged in the plunger cavity (23), the rear part of the plunger (17) is connected with a spring installation seat (15) through a spring (16), and the front end of the plunger (17) is in abutting fit with the surface of the second shaft part (2 b).