CN215440957U

CN215440957U - Upper shaft with plunger mechanism and sewing machine with same

Info

Publication number: CN215440957U
Application number: CN202120796260.XU
Authority: CN
Inventors: 戴慧琪; 张伟伟
Original assignee: Zhejiang Maqi Sewing Machine Co Ltd
Current assignee: Zhejiang Maqi Sewing Machine Co Ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2022-01-07
Anticipated expiration: 2031-04-19

Abstract

The utility model relates to the technical field of sewing equipment, and discloses an upper shaft with a plunger mechanism and a sewing machine with the upper shaft, wherein the upper shaft comprises an upper shaft and an upper shaft middle sleeve which is arranged in a machine shell in a penetrating way; the upper shaft middle sleeve is provided with a plunger which can radially and slidably penetrate through the side wall of the upper shaft middle sleeve; an eccentric groove matched with the plunger is formed in the position, corresponding to the plunger, of the outer side wall of the upper shaft. The eccentric groove on the upper shaft and the pushing plunger piston slide on the side wall of the upper shaft middle sleeve in the radial direction, so that the pressure in the upper shaft middle sleeve is changed, the circulating flow of lubricating oil in the upper shaft middle sleeve is realized, and meanwhile, a good lubricating effect is provided for the upper shaft.

Description

Upper shaft with plunger mechanism and sewing machine with same

Technical Field

The utility model relates to the technical field of sewing equipment, in particular to an upper shaft with a plunger mechanism and a sewing machine with the upper shaft.

Background

An upper shaft of a sewing machine is positioned in a machine shell through a shaft sleeve, and in order to ensure the lubrication of the upper shaft during high-speed rotation, a lubrication structure is usually arranged in the shaft sleeve. For example, the current chinese patent ZL 201220640746.5 discloses a shaft sleeve of a sewing machine, which includes a sleeve body, an oil return groove is formed on an outer wall of the sleeve body, an oil hole is formed on an end surface of the sleeve body along an axial direction of the sleeve body, and the oil hole is communicated with the oil return groove. The upper shaft oil supply pipe is adopted to supply oil to the upper shaft hole cavity, and lubricating oil flows into a gap between the shaft sleeve and the upper shaft through the oil hole in the upper shaft and then enters the oil return groove through the oil hole in the shaft sleeve in the high-speed rotation process of the upper shaft, so that oil return lubrication between the upper shaft and the shaft sleeve is realized. However, in the lubricating process, oil leakage is easy to occur between the shaft sleeve and the upper shaft, and lubricating oil rotates at a high speed along with the upper shaft in the lubricating process and moves towards the rear end of the shaft sleeve, so that oil mist can be formed when the lubricating oil is sprayed out from the tail of the shaft sleeve, and the oil mist is gathered at the head of the sewing machine to form oil accumulation, so that sewing materials are polluted.

Disclosure of Invention

Aiming at the defects of the sewing machine in the prior art, the utility model provides an upper shaft with a plunger mechanism and the sewing machine with the upper shaft.

In order to solve the technical problem, the utility model is solved by the following technical scheme:

the upper shaft with the plunger mechanism comprises an upper shaft and an upper shaft middle sleeve which is arranged in the shell in a penetrating way, and the upper shaft is rotatably arranged in the upper shaft middle sleeve in a penetrating way; the upper shaft middle sleeve is provided with a plunger which can radially and slidably penetrate through the side wall of the upper shaft middle sleeve; an eccentric groove matched with the plunger is formed in the position, corresponding to the plunger, of the outer side wall of the upper shaft.

Preferably, the plunger mechanism further comprises a plunger pressing plate and a plunger spring, the plunger spring penetrates through the plunger, one end of the plunger spring abuts against the inside of the plunger, the plunger pressing plate is fixedly connected with the upper shaft middle sleeve, and the other end of the plunger spring abuts against the plunger pressing plate.

Preferably, the middle part of the plunger pressing plate is provided with a vent hole.

Preferably, the eccentric groove is a circular arc, the plunger acts on the bottom surface of the eccentric groove, and the circular arc diameter of the eccentric groove is larger than the cylindrical diameter of the upper shaft.

Preferably, the side wall of the upper shaft middle sleeve is provided with a plunger hole and an oil supply hole, the plunger hole and the oil supply hole are respectively communicated with the inside of the upper shaft middle sleeve, and the plunger is slidably arranged in the plunger hole in a penetrating manner.

Preferably, the upper shaft middle sleeve is provided with an oil suction hole and an oil spitting hole, the oil suction hole and the oil spitting hole are respectively communicated with the inside of the plunger, the oil suction hole is positioned above the oil spitting hole, and the plunger hole is positioned between the oil suction hole and the oil spitting hole.

Preferably, the oil pan further comprises an oil suction nozzle which is fixedly connected with the upper shaft middle sleeve and communicated with the oil suction hole.

A sewing machine comprises the upper shaft with the plunger mechanism.

Due to the adoption of the technical scheme, the utility model has the remarkable technical effects that: the upper shaft is driven to rotate by a motor or other power sources, and the eccentric groove on the upper shaft and the pushing plunger slide on the side wall of the upper shaft middle sleeve in the radial direction, so that the pressure in the upper shaft middle sleeve is changed, the circulating flow of lubricating oil in the upper shaft middle sleeve is realized, and meanwhile, a good lubricating effect is provided for the upper shaft.

Drawings

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

Fig. 2 is a schematic diagram of the explosive structure of the present invention.

Fig. 3 is a partially enlarged schematic view of the M portion in fig. 2.

Fig. 4 is a partially enlarged schematic view of the N portion in fig. 2.

FIG. 5 is a schematic view of the structure of the upper shaft middle sleeve.

Fig. 6 is a schematic sectional view of a-a in fig. 5.

The names of the parts indicated by the numerical references in the drawings are as follows: the oil pump comprises a shell 1, an upper shaft 2, an upper shaft 3, an upper shaft middle sleeve, a plunger 4, an eccentric groove 5, a plunger pressing plate 6, a plunger spring 7, a plunger spring 8, an air hole 9, a plunger hole 10, an oil supply hole 11, an oil suction hole 12, an oil discharge hole 12 and an oil suction nozzle 13.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1 to 6, the upper shaft with the plunger mechanism comprises an upper shaft 2 and an upper shaft middle sleeve 3 which is arranged in the casing 1 in a penetrating manner, wherein the upper shaft 2 is rotatably arranged in the upper shaft middle sleeve 3 in a penetrating manner; the upper shaft middle sleeve 3 is provided with a plunger 4, and the plunger 4 can radially and slidably penetrate through the side wall of the upper shaft middle sleeve 3; an eccentric groove 5 matched with the plunger 4 is formed in the position, corresponding to the plunger 4, of the outer side wall of the upper shaft 2. The upper shaft 2 is driven to rotate by a motor or other power sources, and the eccentric groove 5 and the pushing plunger 4 on the upper shaft 2 radially slide on the side wall of the upper shaft middle sleeve 3, so that the pressure in the upper shaft middle sleeve 3 is changed, the circulating flow of lubricating oil in the upper shaft middle sleeve 3 is realized, and meanwhile, a good lubricating effect is provided for the upper shaft 2.

Still include plunger clamp plate 6 and plunger spring 7, plunger spring 7 wears to establish in plunger 4 and one end offsets with plunger 4 is inside, plunger clamp plate 6 and upper shaft center 3 fixed connection, and the other end and the plunger clamp plate 6 of plunger spring 7 offset. After the upper shaft 2 pushes the plunger 4 to slide, the plunger spring 7 provides the plunger 4 with reset elastic force, so that the plunger 4 can be conveniently reset under the action of the plunger spring 7 and the plunger pressing plate 6, and the plunger 4 is conveniently pushed to slide next time when the upper shaft 2 rotates.

The middle part of the plunger pressing plate 6 is provided with an air hole 8. In the sliding process of the plunger 4, the pressure balance between the inside and the outside of the upper shaft middle sleeve 3 is ensured, and the radial sliding of the plunger 4 is facilitated.

The eccentric groove 5 is a circular arc, the plunger 4 acts on the bottom surface of the eccentric groove 5, and the circular arc diameter of the eccentric groove 5 is larger than the cylindrical diameter of the upper shaft 2. When the upper shaft 2 rotates, the plunger 4 is pushed by the eccentric groove 5 to slide in the upper shaft middle sleeve 3 in the radial direction.

The side wall of the upper shaft middle sleeve 3 is provided with a plunger hole 9 and an oil supply hole 10, the plunger hole 9 and the oil supply hole 10 are respectively communicated with the inside of the upper shaft middle sleeve 3, and the plunger 4 can be slidably arranged in the plunger hole 9 in a penetrating mode. The plunger piston hole 9 is radially arranged on the upper shaft middle sleeve 3, and the stability of the radial sliding of the plunger piston 4 is improved. The oil pump is connected with the oil supply hole 10 through an oil pipe and supplies oil to the interior of the upper shaft middle sleeve 3, so that the upper shaft middle sleeve 3 is prevented from being blocked.

The upper shaft middle sleeve 3 is provided with an oil suction hole 11 and an oil spitting hole 12, the oil suction hole 11 and the oil spitting hole 12 are respectively communicated with the inside of the plunger 4, the oil suction hole 11 is positioned above the oil spitting hole 12, and the plunger hole 9 is positioned between the oil suction hole 11 and the oil spitting hole 12. The upper shaft 2 rotates to push the plunger 4 to move, and the oil suction hole 11 sucks the accumulated oil position of the sewing machine into the upper shaft middle sleeve 3 under the action of the plunger 4, so that the lubricating oil is recycled, and the oil suction efficiency and the lubricating oil utilization efficiency are improved.

Example 2

As shown in fig. 1 to 6, the upper shaft with the plunger mechanism further includes an oil suction nozzle 13 on the basis of embodiment 1, and the oil suction nozzle 13 is fixedly connected with the upper shaft middle sleeve 3 and is communicated with the oil suction hole 11. The extended oil suction pipe is connected with the oil suction nozzle 13, so that the oil suction pipe can be conveniently placed at the oil accumulation position of the sewing machine at will, the accumulated oil at different oil accumulation positions can be sucked into the upper shaft middle sleeve 3, and the connection between the oil suction pipe and the upper shaft middle sleeve 3 is facilitated through the oil suction nozzle 13.

Example 3

A sewing machine, as shown in fig. 1 to 6, comprises the upper shaft with the plunger mechanism described above.

When the oil-saving device works, the motor drives the upper shaft 2 to rotate, the eccentric groove 5 on the upper shaft 2 pushes the plunger 4 to slide in the plunger hole 9, so that the internal pressure of the upper shaft middle sleeve 3 changes, when the plunger 4 slides in the direction far away from the upper shaft 2, the air pressure in the upper shaft middle sleeve 3 is reduced, lubricating oil enters the upper shaft middle sleeve 3 from the oil supply hole 10, and the oil suction pipe sucks the lubricating oil at the oil accumulation position into the oil suction nozzle 13 and the oil suction hole 11 and then enters the upper shaft middle sleeve 3. When the plunger 4 moves toward the upper shaft 2, the lubricating oil is discharged from the oil discharge hole 12,

the utility model relates to an upper shaft with a plunger mechanism and a sewing machine with the upper shaft, which have the following characteristics and advantages:

1. the plunger capable of sliding in the upper shaft middle sleeve is arranged on the upper shaft middle sleeve, and the plunger is pushed to slide through the rotation of the upper shaft, so that the oil absorption and the oil discharge of the upper shaft middle sleeve are realized, the upper shaft middle sleeve is lubricated, the specific structure of the plunger mechanism is simplified, and the lubricating effect of the upper shaft middle sleeve is improved.

2. The oil suction hole and the oil suction nozzle are arranged on the upper shaft middle sleeve, the oil suction pipe is connected with the oil suction nozzle, when the plunger moves in the direction far away from the upper shaft, the oil suction pipe sucks the accumulated oil at the oil accumulation position of the sewing machine into the upper shaft middle sleeve, the oil supply efficiency of the upper shaft middle sleeve is improved, and meanwhile, the cyclic utilization of lubricating oil is improved.

Claims

1. Upper shaft with plunger mechanism, including upper shaft (2), its characterized in that: the upper shaft (2) is rotatably arranged in the upper shaft middle sleeve (3) in a penetrating way;

the upper shaft middle sleeve (3) is provided with a plunger (4), and the plunger (4) can radially and slidably penetrate through the side wall of the upper shaft middle sleeve (3);

an eccentric groove (5) matched with the plunger (4) is formed in the position, corresponding to the plunger (4), on the outer side wall of the upper shaft (2).

2. The upper shaft with plunger mechanism of claim 1, wherein: the plunger pressing plate (6) and the plunger spring (7) are further included, the plunger spring (7) is arranged in the plunger (4) in a penetrating mode, one end of the plunger spring is abutted to the inside of the plunger (4), the plunger pressing plate (6) is fixedly connected with the upper shaft middle sleeve (3), and the other end of the plunger spring (7) is abutted to the plunger pressing plate (6).

3. The upper shaft with plunger mechanism of claim 2, wherein: the middle part of the plunger pressing plate (6) is provided with an air vent (8).

4. The upper shaft with plunger mechanism of claim 1, wherein: the eccentric groove (5) is a circular arc, the plunger (4) acts on the bottom surface of the eccentric groove (5), and the circular arc diameter of the eccentric groove (5) is larger than the cylindrical diameter of the upper shaft (2).

5. The upper shaft with plunger mechanism of claim 1 or 2 or 3 or 4, wherein: the side wall of the upper shaft middle sleeve (3) is provided with a plunger hole (9) and an oil supply hole (10), the plunger hole (9) and the oil supply hole (10) are respectively communicated with the inside of the upper shaft middle sleeve (3), and the plunger (4) can be slidably arranged in the plunger hole (9) in a penetrating manner.

6. The upper shaft with plunger mechanism of claim 5, wherein: an oil suction hole (11) and an oil spitting hole (12) are formed in the upper shaft middle sleeve (3), the oil suction hole (11) and the oil spitting hole (12) are respectively communicated with the interior of the plunger (4), the oil suction hole (11) is located above the oil spitting hole (12), and the plunger hole (9) is located between the oil suction hole (11) and the oil spitting hole (12).

7. The upper shaft with plunger mechanism of claim 6, wherein: the oil suction device also comprises an oil suction nozzle (13), wherein the oil suction nozzle (13) is fixedly connected with the upper shaft middle sleeve (3) and communicated with the oil suction hole (11).

8. A sewing machine characterized by: an upper shaft with a plunger mechanism as claimed in any one of claims 1 to 7.