CN210657492U

CN210657492U - Check valve device in sewing machine oil circuit

Info

Publication number: CN210657492U
Application number: CN201921528607.1U
Authority: CN
Inventors: 颜海荣
Original assignee: Zhejiang Maqi Sewing Machine Co Ltd
Current assignee: Meiji Technology Group Co ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-06-02
Anticipated expiration: 2029-09-12

Abstract

The utility model provides a check valve device in sewing machine oil circuit belongs to sewing equipment technical field. The sewing machine solves the technical problems that lubricating oil backflow is easy to occur in the existing sewing machine, oil leakage is caused, and the like. This check valve device includes the valve casing, is equipped with the oil passage in the valve casing, and the lower extreme of valve casing has the inlet port that is linked together with the oil passage, and the upper end of valve casing has set firmly the upper cover, covers on the upper cover and sets up the oil outlet that is linked together with the oil passage, and the oil passage of valve casing is equipped with the valve ball in being equipped with, and the valve ball can reciprocate in the oil passage and the valve ball can shutoff inlet port and the intercommunication department of crossing the oil passage. The utility model provides a check valve device is after the oil pump stop work, and the valve ball can be stopped up oil inlet and the intercommunication department of oily passageway downwards under the action of gravity to reach non-return effect, effectively avoided the oil leak phenomenon that the lubricating oil backward flow caused.

Description

Check valve device in sewing machine oil circuit

Technical Field

The utility model belongs to the technical field of sewing machine, a lubricated oil feeding system of sewing machine is related to, especially a check valve device in sewing machine oil circuit.

Background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The lubrication of the sewing machine is an important means for ensuring the normal operation of the sewing machine, and the related parts can not work normally or even be damaged due to the lack of continuous and stable oil supply for lubrication. The automatic oil supply and return system of the sewing machine commonly arranged in the market often has the problems of oil leakage, untimely oil return and the like in the use process, when the sewing machine stops, lubricating oil often flows backwards from an oil way or an oil pipe, and the lubricating oil is accumulated at the head of the sewing machine, so that the oil leakage phenomenon occurs at the needle rod, the pressure rod and the lower part of the face.

Chinese patent (publication number: CN 103938376B; publication number: 2017-05-17) discloses an oil pan oil return device, which comprises a bottom plate, an oil pan, a lower shaft rear sleeve and a lower shaft, wherein an eccentric section is arranged on the lower shaft, the eccentric section is arranged in the lower shaft rear sleeve, a plunger hole, an oil outlet hole and an oil return hole are radially arranged on the lower shaft rear sleeve, a plunger is arranged in the plunger hole, the inner end of the plunger is in contact connection with the eccentric section, the outer end of the plunger is connected with an elastic plug, the lower shaft rotates, the eccentric section drives the plunger to reciprocate in the plunger hole to form a plunger pump structure, an oil return pipe is connected to the oil return hole, the other end of the oil return pipe is arranged in the oil pan, and the oil outlet hole is connected with an oil pipe for discharging.

In the above patent document, the oil in the oil pan is sent to the oil box by the plunger pump for recycling, and when the plunger pump stops moving, all the lubricating oil in the oil path cannot be completely pumped into the oil pan, so that it is difficult to avoid the phenomenon of backflow of the lubricating oil in the oil path.

Disclosure of Invention

The utility model discloses to the above-mentioned problem that prior art exists, provide a check valve device in sewing machine oil circuit, the utility model aims to solve the technical problem that: how to provide a simple structure, with low costs and can use the check valve device in the sewing machine oil circuit thereby effectively prevent the oil leak phenomenon that lubricating oil backward flow flows and arouses.

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

the utility model provides a check valve device in sewing machine oil circuit, includes the valve casing, its characterized in that, be equipped with the oil passage in the valve casing, the lower extreme of valve casing have with the inlet port that the oil passage is linked together crosses, the upper end of valve casing has set firmly the upper cover, on cover set up with the oil outlet that the oil passage is linked together crosses, be equipped with the valve ball in the oil passage of valve casing, the valve ball can cross reciprocate in the oil passage just the valve ball can the shutoff the inlet port with the intercommunication department of crossing the oil passage.

The working principle is as follows: the check valve device is arranged on an oil pipe, when the sewing machine is normally operated for lubrication, lubricating oil can flow in from an oil inlet under the action of an oil pump, when the lubricating oil reaches the position where the oil inlet is connected with the oil passage, the valve ball is upwards supported by buoyancy and impact force, the lubricating oil passes through the oil passage and then continues to move forwards in the oil pipe from an oil outlet of an upper cover, the oil way of the whole oil pipe is unblocked at the moment, so that the oil supply and return effects are achieved, when the oil pump stops operating, the lubricating oil in the oil pipe stops flowing, the lubricating oil at the high position flows back to the low position, and the valve ball in the check valve device can downwards block the communication position of the oil inlet and the oil passage under the action of gravity, so that the check effect is achieved, the oil leakage phenomenon caused by the backflow of the lubricating oil is effectively avoided; the whole check valve device has simple structure, low manufacturing and using cost and stable and reliable operation.

In the check valve device in the sewing machine oil path, the cross sections of the oil passing channel and the oil inlet are circular, the oil passing channel and the oil inlet are coaxially arranged, and the diameter of the valve ball is larger than that of the oil inlet and smaller than that of the oil passing channel. Therefore, the valve ball can not block the oil passage and can also block the communication part between the oil inlet and the oil passage, thereby achieving the effect of stopping the flow. The valve ball can be used for a long time without running and damage.

In the check valve device in the sewing machine oil path, a chamfer angle enabling the port of the oil inlet hole to be flared is arranged at the joint of the upper end of the oil inlet hole and the oil passing channel. Thus, the contact surface between the valve ball and the wall of the oil inlet hole is increased, and the sealing performance is ensured.

In the check valve device in the oil circuit of the sewing machine, the valve casing is cylindrical, the axes of the oil passage and the oil inlet are coincident with the central line of the valve casing, the upper end of the valve casing is provided with a through hole penetrating through two sides of the valve casing, and the through hole is communicated with the oil passage along the diameter direction of the valve casing; a limiting rod is inserted into the through hole, the peripheral surface of the limiting rod is in sealing connection with the hole wall of the through hole, and the valve ball is located between the bottom of the oil passing channel and the limiting rod. The limiting rod is used for limiting the movement position of the valve ball in the valve shell and preventing the valve ball from falling off.

In the check valve device in the oil circuit of the sewing machine, the upper cover is cylindrical, the outer peripheral surface of the upper cover is provided with the annular boss, the lower end of the upper cover is in screwed connection with the upper end of the valve casing or the tight fit of the upper end and the lower end of the valve casing, the annular boss is abutted against the upper end surface of the valve casing, and the oil outlet is arranged along the axial direction of the upper cover. The whole assembly of being convenient for like this, it is very convenient to can guarantee the reliable and stable nature of connection.

The utility model provides a check valve device has following advantage for prior art:

1. after the oil pump stops working, the valve ball can downwards plug the communication position of the oil inlet and the oil passing channel under the action of gravity, so that the check effect is achieved, and the oil leakage phenomenon caused by backflow of lubricating oil is effectively avoided.

2. The check valve device has simple integral structure, low manufacturing and using cost and stable and reliable operation; and the application range is wide, and the universality is high.

Drawings

Fig. 1 is a schematic view of the structure of the check valve device.

In the figure, 1, a valve housing; 11. an oil passing channel; 12. an oil inlet hole; 13. chamfering; 14. a through hole; 2. an upper cover; 21. an oil outlet hole; 22. an annular boss; 3. a valve ball; 4. a limiting rod.

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.

As shown in fig. 1, the check valve device includes a valve housing 1, an oil passage 11 is provided in the valve housing 1, an oil inlet 12 communicated with the oil passage 11 is provided at the lower end of the valve housing 1, an upper cover 2 is fixedly provided at the upper end of the valve housing 1, an oil outlet 21 communicated with the oil passage 11 is provided on the upper cover 2, a valve ball 3 is provided in the oil passage 11 of the valve housing 1, the valve ball 3 can move up and down in the oil passage 11, and the valve ball 3 can block the oil inlet 12 and the communicating part of the oil passage 11.

In the embodiment, the cross sections of the oil passing channel 11 and the oil inlet 12 are circular, the oil passing channel 11 and the oil inlet 12 are coaxially arranged, and the diameter of the valve ball 3 is larger than that of the oil inlet 12 and smaller than that of the oil passing channel 11; further, as shown in fig. 1, a chamfer 13 for flaring the port of the oil inlet hole 12 is arranged at the joint of the upper end of the oil inlet hole 12 and the oil passing channel 11; the valve casing 1 is also cylindrical, the axes of the oil passage 11 and the oil inlet 12 coincide with the central line of the valve casing 1, the upper end of the valve casing 1 is provided with a through hole 14 penetrating through two sides of the valve casing 1, and the through hole 14 is communicated with the oil passage 11 along the diameter direction of the valve casing 1; a limiting rod 4 is inserted into the through hole 14, the peripheral surface of the limiting rod 4 is in sealing connection with the hole wall of the through hole 14, and the valve ball 3 is positioned between the bottom of the oil passage 11 and the limiting rod 4; the upper cover 2 is cylindrical, has annular boss 22 on the outer peripheral face of upper cover 2, and the lower extreme spiro union of upper cover 2 is in the upper end of valve casing 1 or both tight fits, and annular boss 22 supports and leans on the up end of valve casing 1, and oil outlet 21 sets up along 2 axis directions of upper cover.

The valve ball 3 is installed in the valve casing 1, the valve ball 3 is movable in the oil passage 11 of the valve casing 1, a gap is provided between the peripheral surface of the valve ball 3 and the inner wall of the oil passage 11, the check valve device is installed on the oil pipe, when the sewing machine is normally operated for lubrication, the lubricating oil can flow in from the oil inlet 12 under the action of the oil pump, when the lubricating oil reaches the position where the oil inlet 12 is connected with the oil passage 11, the valve ball 3 is supported upwards by buoyancy and impact force, the lubricating oil passes through the oil passage 11 and then continues to move forwards in the oil pipe from the oil outlet 21 of the upper cover 2, the oil circuit of the whole oil pipe is unblocked at the moment, so as to achieve the functions of oil supply and oil return, when the oil pump stops operating, the lubricating oil in the oil pipe stops flowing, at the moment, the lubricating oil at the high position flows back to the low position, the valve ball 3 in the check valve device can block the communication position of the oil inlet 12 and the, thereby achieving the effect of non-return and effectively avoiding the oil leakage phenomenon caused by the backflow of the lubricating oil; the whole check valve device has simple structure, low manufacturing and using cost and stable and reliable 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.

Although more uses are made herein of 1, a valve housing; 11. an oil passing channel; 12. an oil inlet hole; 13. chamfering; 14. a through hole; 2. an upper cover; 21. an oil outlet hole; 22. an annular boss; 3. a valve ball; 4. stop rods, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a check valve device in sewing machine oil circuit, includes valve casing (1), its characterized in that, be equipped with oil passage (11) in valve casing (1), the lower extreme of valve casing (1) have with oil feed port (12) that oil passage (11) are linked together cross, the upper end of valve casing (1) has set firmly upper cover (2), set up on upper cover (2) with cross oil outlet (21) that oil passage (11) are linked together, be equipped with valve ball (3) in the oil passage (11) of crossing of valve casing (1), valve ball (3) can cross and reciprocate in oil passage (11) just valve ball (3) can the shutoff oil feed port (12) with the intercommunication department of crossing oil passage (11).

2. The check valve device in the oil circuit of the sewing machine according to claim 1, characterized in that the cross section of the oil passage (11) and the cross section of the oil inlet hole (12) are both circular, the oil passage (11) and the oil inlet hole (12) are coaxially arranged, and the diameter of the valve ball (3) is larger than the diameter of the oil inlet hole (12) and smaller than the diameter of the oil passage (11).

3. The check valve device in the oil circuit of the sewing machine according to claim 2, characterized in that the joint of the upper end of the oil inlet hole (12) and the oil passing channel (11) is provided with a chamfer angle (13) which makes the port of the oil inlet hole (12) flaring.

4. The check valve device in the oil circuit of the sewing machine according to claim 3, characterized in that the valve casing (1) is cylindrical, the axes of the oil passage (11) and the oil inlet (12) coincide with the center line of the valve casing (1), the upper end of the valve casing (1) is provided with a through hole (14) penetrating through both sides of the valve casing (1), and the through hole (14) is communicated with the oil passage (11) along the diameter direction of the valve casing (1); the valve ball is characterized in that a limiting rod (4) is inserted into the through hole (14), the peripheral surface of the limiting rod (4) is in sealing connection with the hole wall of the through hole (14), and the valve ball (3) is located between the bottom of the oil passing channel (11) and the limiting rod (4).

5. The check valve device in the oil circuit of the sewing machine according to claim 4, wherein the upper cover (2) is cylindrical, an annular boss (22) is provided on the outer peripheral surface of the upper cover (2), the lower end of the upper cover (2) is screwed on the upper end of the valve casing (1) or tightly fitted with the upper end of the valve casing, the annular boss (22) abuts against the upper end surface of the valve casing (1), and the oil outlet (21) is provided along the axial direction of the upper cover (2).