Oil pump for sewing machine

Abstract

The utility model discloses an oil pump for a sewing machine, belongs to the technical field of oil pumps, and solves the problems that an existing device hinders circulation of oil only through a check block, the pressurization effect on the oil is poor, and the oil supply amount of the oil pump is prone to being reduced. The oil pump comprises a pump body, the pump body comprises a front portion, a middle portion and a rear portion, and an oil cavity is formed in the pump body. A baffle is arranged on the upper right side of the inner wall of the oil cavity and divides the oil cavity into a pressurizing area on the left side and an oil outlet area on the right side, an oil discharging hole located in the upper right corner is formed in the back face of the oil outlet area, the oil discharging pipe is communicated with the oil discharging hole, and a pressurizing assembly driven by a motor is arranged in the pump body. Through the arrangement of the gear groove and the baffle, oil in the pressurizing area can be pressurized for the first time, through the arrangement of the idle gear, the pressurizing gear and the gear groove can rotate together, then oil entering the oil outlet area is pressurized for the second time through the pressurizing gear, and the oil supply effect of the oil pump can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil pump technical field, concretely is oil pump for sewing machine. BACKGROUND

[0002] Sewing machine oil pump is the important accessory of sewing machine, is used for ensuring the circulation and recovery of oil in the operation process of sewing machine, and the oil pump of sewing machine is rotated by motor drive shaft, and the impeller equipped on the drive shaft also rotates, and with the continuous rotation of the drive shaft, the necessary lubrication can be provided for the sewing machine.

[0003] Through the search, the application book with patent application number 202321715530.5 discloses a kind of sewing machine low-noise oil pump, including pump body and impeller, oil cavity is in pump body, impeller is rotatably connected in oil cavity, impeller includes shaft body, recess is symmetrically arranged on the sidewall of shaft body and forms cam portion at the place of shaft body, backflow cavity is formed between cam portion and pump body inner wall, protruding column is set on pump body corresponding cam portion, and hollow is formed in the interior of protruding column and is formed into sliding slot, piston for abutting cam portion is slidably connected in sliding slot, the end of sliding slot away from pump body is provided with plug body for closing, reset spring is arranged between plug body and piston, and connects both sides, protruding oil return pipe is formed on one side of pump body and is communicated with backflow cavity, oil outlet is opened on the top wall of protruding column, and oil outlet vertically penetrates protruding column and forms oil outlet channel communicated with backflow cavity, oil liquid flows through oil outlet channel before being discharged from oil outlet during oil return process;

[0004] Although the block of the sewing machine low-noise oil pump divides the oil cavity into pressurization area and oil outlet area, and the oil liquid can be better pressurized in the pressurization area before being discharged, the sewing machine low-noise oil pump only hinders the flow of oil liquid by block, and the pressurization effect of oil liquid is poor, and the oil supply of oil pump is easily reduced.

[0005] Therefore, we propose an oil pump for sewing machine. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies of prior art, the utility model provides an oil pump for sewing machine, which solves the problem that the prior art only hinders the flow of oil liquid by block, the pressurization effect of oil liquid is poor, and the oil supply of oil pump is easily reduced.

[0007] To achieve the above object, the utility model is realized by the following technical scheme: an oil pump for sewing machine, comprising a pump body, the pump body includes a front part, a middle part and a rear part, a backflow pipe is arranged on the sidewall of the front part, an oil discharge pipe is arranged on the back of the front part, a front end cover is detachably mounted on the front side of the pump body by bolts, an oil inlet is formed on the front end face of the front end cover, a filter screen is arranged in the oil inlet, an oil cavity is arranged in the pump body, and a baffle is arranged on the right upper side of the inner wall of the oil cavity.

[0008] The baffle is in "L" shape, the baffle separates the oil cavity into the left side pressure area and the right side oil outlet area, the back surface of the oil outlet area is provided with the oil outlet hole at the right upper corner, the oil outlet pipe is communicated with the oil outlet hole, the inside of the pump body is provided with the pressure boosting assembly driven by the motor, the pressure boosting assembly is assembled with the dredging assembly;

[0009] The pressure boosting assembly comprises a shaft body, a disc body is fixedly installed on the front end surface of the shaft body, the shaft body and the disc body are respectively rotatably sleeved in the inside of the middle part and the front part, a gear groove is fixedly installed on the surface of the disc body, a plurality of first blades in linear array are arranged on the arc surface of the disc body, an idle gear meshing with the first blades is rotatably installed on the back surface of the oil outlet area through a bearing ring, a pressure boosting gear meshing with the idle gear is rotatably installed on the back surface of the oil outlet area through a bearing ring, and a second blade is fixedly installed on the front side surface of the pressure boosting gear.

[0010] Preferably, the second blade and the gear groove are both arc-shaped, and the middle parts of the second blade and the gear groove are both arched towards the rotating direction, wherein the oil liquid can be pushed into the inside of the oil outlet area through the gear groove, and the oil liquid in the inside of the oil outlet area can be pushed into the oil outlet hole through the pressure boosting gear.

[0011] Preferably, a gasket is arranged between the front part and the end cover, and a through hole is formed in the middle part of the front end surface of the gasket, wherein the gasket can increase the sealing property of the connection between the front part and the end cover, and the through hole can preliminarily increase the oil pressure of the oil liquid entering the inside of the pressure boosting area.

[0012] Preferably, a threaded hole is formed in the middle part of the front end surface of the disc body, the threaded hole extends to the inside of the shaft body, the threaded hole, the through hole and the oil inlet are coaxially arranged, the dredging assembly comprises a threaded column which is screwed in the inside of the threaded hole, a connecting rod is fixedly installed on the middle part of the front end surface of the threaded column, and a brushing plate is fixedly installed on the end of the connecting rod away from the threaded column, wherein the threaded column is conveniently installed in the inside of the threaded hole.

[0013] Preferably, the diameter of the threaded column is smaller than the diameter of the oil inlet and is the same as the diameter of the through hole, a plurality of brushes are fixedly installed on the side of the brushing plate away from the connecting rod, and the brushes are in contact with the surface of the filter screen, wherein the brushes on the brushing plate can clean the blocked impurities in the filter screen, so that the oil liquid can flow smoothly.

[0014] The utility model provides an oil pump for sewing machine. Possess following beneficial effect:

[0015] 1. The oil pump for the sewing machine, through the setting of the gear groove and the baffle, the oil in the pressurization area can be pressurized once, through the setting of the idler gear, the pressurization gear and the pressurization gear and the gear groove can rotate together, and then the oil in the oil outlet area is pressurized twice by the pressurization gear, which is beneficial to increase the oil pressure and improve the oil supply effect of the oil pump, solves the problem that the existing device only blocks the circulation of the oil by the block, the pressurization effect of the oil is poor, and the oil supply of the oil pump is reduced.

[0016] 2. The oil pump for the sewing machine, the pressurization assembly can drive the dredging assembly to rotate, when the disc body and the shaft body rotate, the threaded column, the connecting rod and the brushing plate can rotate together, and then the brush on the brushing plate can clean the surface of the filter screen, the impurities blocked in the filter screen can be cleaned down, the situation that the oil circulation is not smooth due to the impurities blocking the filter screen is avoided, so that the oil pump has stable oil supply effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structure schematic view of the utility model;

[0018] Figure 2 It is a side view structure schematic view of the utility model;

[0019] Figure 3 It is a split structure schematic view of the utility model;

[0020] Figure 4 It is a front structure schematic view of the utility model;

[0021] Figure 5 It is a split structure schematic view of the disc body and the dredging assembly of the utility model.

[0022] In the drawing: 1, pump body; 11, front part; 111, pressurization area; 112, baffle; 113, oil discharge hole; 114, oil outlet area; 12, middle part; 13, rear part; 2, oil return pipe; 3, end cover; 31, oil inlet; 32, filter screen; 4, pad; 41, through hole; 5, pressurization assembly; 51, shaft body; 52, disc body; 53, first blade; 54, threaded hole; 55, gear groove; 56, idler gear; 57, pressurization gear; 58, second blade; 6, dredging assembly; 61, threaded column; 62, connecting rod; 63, brushing plate; 7, oil discharge pipe. DETAILED DESCRIPTION

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1:

[0025] like Figures 1-5 As shown: The pump body 1 includes a front part 11, a middle part 12 and a rear part 13. A return oil pipe 2 is provided on the side wall of the front part 11, and an oil drain pipe 7 is provided on the back of the front part 11. An end cover 3 is detachably installed on the front side of the pump body 1 by bolts. An oil inlet 31 is opened on the front end face of the end cover 3. A filter screen 32 is provided inside the oil inlet 31. An oil chamber is provided inside the pump body 1. A baffle 112 is provided on the upper right side of the inner wall of the oil chamber. The baffle 112 is "L" shaped and divides the oil chamber into a pressurization zone 111 on the left and an oil outlet zone 114 on the right. An oil drain hole 113 is opened on the back of the oil outlet zone 114 located in the upper right corner. The oil drain pipe 7 is connected to the oil drain hole 113.

[0026] The pump body 1 is equipped with a booster assembly 5 driven by a motor. The booster assembly 5 is equipped with a dredging assembly 6. The booster assembly 5 includes a shaft 51. A disc 52 is fixedly installed on the front end face of the shaft 51. The shaft 51 and the disc 52 are respectively rotatably fitted inside the middle part 12 and the front part 11. A gear groove 55 is fixedly installed on the surface of the disc 52. The arc surface of the disc 52 has first blades 53 arranged in a linear array. An idler gear 56 that meshes with the first blade 53 is rotatably installed on the back of the oil outlet area 114 through a bearing ring. A booster gear 57 that meshes with the idler gear 56 is rotatably installed on the back of the oil outlet area 114 through a bearing ring. A second blade 58 is fixedly installed on the front side of the booster gear 57. The second blade 58 and the gear groove 55 are both arc-shaped. The middle part of the second blade 58 and the gear groove 55 are both arched in the direction of rotation. A pad 4 is provided between the front part 11 and the end cover 3. A through hole 41 is opened in the middle of the front end face of the pad 4.

[0027] By setting the gear groove 55 and the baffle 112, the oil inside the pressurization zone 111 can be pressurized once. By setting the idler gear 56, the pressurization gear 57 and the second blade 58 can rotate together with the gear groove 55, and then the oil entering the oil outlet zone 114 can be pressurized a second time through the second blade 58, which is beneficial to increase the oil pressure and improve the oil supply effect of the oil pump.

[0028] Example 2:

[0029] like Figures 3-4As shown: A threaded hole 54 is provided in the middle of the front end face of the disc body 52. ​​The threaded hole 54 extends into the interior of the shaft body 51. The threaded hole 54, the through hole 41, and the oil inlet 31 are coaxially arranged. The unblocking component 6 includes a threaded post 61 threadedly fitted inside the threaded hole 54. A connecting rod 62 is fixedly installed in the middle of the front end face of the threaded post 61. A brush plate 63 is fixedly installed at the end of the connecting rod 62 away from the threaded post 61. The diameter of the threaded post 61 is smaller than the diameter of the oil inlet 31 and the same as the diameter of the through hole 41. The brush plate 63 is located away from the connecting rod 61. A uniformly distributed brush is fixedly installed on one side of the filter screen 32. The brush contacts the surface of the filter screen 32. The pressure boosting component 5 can drive the unblocking component 6 to rotate. When the disc body 52 and the shaft body 51 rotate, the threaded column 61, the connecting rod 62 and the brush plate 63 can rotate together. Then, the brush on the brush plate 63 cleans the surface of the filter screen 32, which can remove the impurities blocked in the filter screen 32 and prevent the impurities from blocking the filter screen 32 and causing poor oil flow, so as to ensure that the oil pump has a stable oil supply effect.

[0030] The working principle and usage process of this utility model: This oil pump for sewing machines is used by mounting the rear part 13 on the motor and connecting the output end of the motor to the shaft 51. The motor then drives the shaft 51 and the disc 52 at its end to rotate. The oil enters the interior of the pressurization zone 111 through the oil inlet 31. Then, the oil is pushed into the interior of the oil outlet zone 114 by the gear groove 55. The baffle 112 can pressurize the oil in the pressurization zone 111. The idler gear 56 meshes with the first blade 53 and the pressurizing gear 57, so that the pressurizing gear 57 and the second blade 58 can rotate synchronously. Then, the second blade 58 pushes the oil in the oil outlet zone 114 into the oil outlet hole 113. During this process, the second blade 58 can pressurize the oil a second time. Then, the oil is discharged through the oil outlet pipe 7.

[0031] When the disc 52 and the shaft 51 rotate, they can drive the threaded column 61, the connecting rod 62 and the brush plate 63 to rotate together, thereby causing the brush on the brush plate 63 to clean the surface of the filter screen 32 and remove the impurities that are blocked in the filter screen 32.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An oil pump for a sewing machine, comprising a pump body (1), the pump body (1) comprising a front part (11), a middle part (12) and a rear part (13), wherein an oil return pipe (2) is provided on the side wall of the front part (11), an oil drain pipe (7) is provided on the back of the front part (11), an end cap (3) is detachably installed on the front side of the pump body (1) by bolts, an oil inlet (31) is provided on the front end face of the end cap (3), a filter screen (32) is provided inside the oil inlet (31), an oil chamber is provided inside the pump body (1), and a baffle (112) is provided on the upper right side of the inner wall of the oil chamber; Its features are: The baffle (112) is L-shaped and divides the oil chamber into a pressurization zone (111) on the left and an oil outlet zone (114) on the right. An oil drain hole (113) located in the upper right corner is provided on the back of the oil outlet zone (114). The oil drain pipe (7) is connected to the oil drain hole (113). The pump body (1) is equipped with a pressurization component (5) driven by a motor. A dredging component (6) is mounted on the pressurization component (5). The booster assembly (5) includes a shaft (51), a disc (52) is fixedly mounted on the front end face of the shaft (51), the shaft (51) and the disc (52) are respectively rotatably fitted inside the middle part (12) and the front part (11), a gear groove (55) is fixedly mounted on the surface of the disc (52), and the arc surface of the disc (52) is provided with first blades (53) arranged in a linear array. The back side of the oil outlet area (114) is rotatably mounted with an idler gear (56) that meshes with the first blade (53) through a bearing ring. The back side of the oil outlet area (114) is rotatably mounted with a booster gear (57) that meshes with the idler gear (56) through a bearing ring. The front side of the booster gear (57) is fixedly mounted with a second blade (58).

2. The oil pump for a sewing machine according to claim 1, characterized in that: The second blade (58) and the gear groove (55) are both arc-shaped, and the middle part of the second blade (58) and the gear groove (55) are both arched in the direction of rotation.

3. The oil pump for a sewing machine according to claim 1, characterized in that: A pad (4) is provided between the front part (11) and the end cap (3), and a through hole (41) is provided in the middle of the front end face of the pad (4).

4. The oil pump for a sewing machine according to claim 3, characterized in that: A threaded hole (54) is provided in the middle of the front end face of the disc body (52). The threaded hole (54) extends into the interior of the shaft body (51). The threaded hole (54), the through hole (41), and the oil inlet (31) are coaxially arranged. The unblocking component (6) includes a threaded post (61) that is threaded into the threaded hole (54). A connecting rod (62) is fixedly installed in the middle of the front end face of the threaded post (61). A brush plate (63) is fixedly installed at the end of the connecting rod (62) away from the threaded post (61).

5. The oil pump for a sewing machine according to claim 4, characterized in that: The diameter of the threaded post (61) is smaller than the diameter of the oil inlet (31) and the same as the diameter of the through hole (41). The brush plate (63) is fixedly installed with uniformly distributed brushes on the side away from the connecting rod (62). The brushes are in contact with the surface of the filter screen (32).

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