Oil pump for sewing machine

Abstract

The oil pump for the sewing machine comprises a pump body, oil cavities are formed in the middles of the two sides of the pump body, a middle pin shaft is connected to the middle of the pump body in a penetrating and penetrating mode, sealing plates cover the outer sides of the oil cavities, sealing rings are arranged at the two ends of the middle pin shaft in a sleeved mode, extrusion edge sealing pads are arranged on one sides of the sealing rings, and a power gear is installed in the middle of the middle pin shaft. A first oil supply gear and a second oil supply gear are arranged in the oil cavity, a fixing shaft is installed on the surface of the inner wall of the oil cavity, the second oil supply gear is connected with the fixing shaft, the middle pin shaft extends into the oil cavity, the first oil supply gear is connected with the end of the middle pin shaft, an oil inlet pipe is arranged on one side of the sealing plate, and an oil outlet pipe is arranged on the other side of the sealing plate. According to the oil pump for the sewing machine, a sealing ring and an extrusion edge sealing pad are adopted to replace a traditional copper sleeve and an oil seal, cost is greatly saved, assembly and maintenance are convenient, and efficiency is improved.

Description

TECHNICAL FIELD

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

[0002] Sewing machine is with one or more sewing line, on the sewing material forms one or more line, makes one layer or more sewing material interweaves or sews up the machine. The existing sewing machine generally in order to lubricate some mechanical structure, will adopt oil pump and carry out oil supply work. The oil pump of general sewing machine is gear pump, and the oil pump is in the connecting place of middle axle and pump body in order to prevent oil leakage and will be sealed by the way of installing copper bush, oil seal, this way is inconvenient to install, and the cost is higher. SUMMARY

[0003] The utility model aims at providing an oil pump for sewing machine to solve the problems in the above background.

[0004] In order to achieve the above object, the utility model provides the following technical scheme: an oil pump for sewing machine, including pump body, the middle part of both sides of pump body is equipped with oil cavity, the middle part of pump body is connected with middle pin shaft, the outside cover of oil cavity is equipped with sealing plate, the both ends of middle pin shaft are all equipped with sealing ring, one side of sealing ring is equipped with extrusion edge pad, the middle part of middle pin shaft is installed with power gear, the inside of oil cavity is equipped with first oil supply gear and second oil supply gear, the surface of oil cavity inner wall is installed with fixed shaft, the second oil supply gear is connected with fixed shaft, the middle pin shaft extends to the inside of oil cavity, and the first oil supply gear is connected with the end of middle pin shaft, one side of sealing plate is equipped with oil inlet pipe, the other side of sealing plate is equipped with oil outlet pipe, the middle part of oil inlet pipe is equipped with middle cylinder, the inside of middle cylinder is installed with filter core, the side of sealing plate close to pump body is equipped with sealing disc.

[0005] Preferably, the sealing ring is connected to the surface of the inner side of the pump body, the middle part of the pump body is provided with a through hole matched with the middle pin shaft, and the through hole corresponds to the oil cavity.

[0006] Preferably, the surface of both sides of the pump body is provided with a first fixing hole, the surface of the sealing plate is provided with a second fixing hole corresponding to the first fixing hole, and the first fixing hole and the second fixing hole facilitate the installation of the pump body and the sealing plate.

[0007] Preferably, the top of the pump body is provided with a pin hole, and one side of the power gear is provided with a positioning hole.

[0008] Preferably, the sealing disc is matched with the oil cavity, and the sealing plate is matched with the side surface of the pump body.

[0009] Preferably, the bottom of the middle cylinder is threadedly connected with a bottom cover, and both sides of the middle cylinder are provided with material openings corresponding to the oil inlet pipe and the oil outlet pipe.

[0010] Preferably, the sealing disc comprises a base material layer, a corrosion-proof layer connected to the outside of the base material layer and a waterproof layer connected to the outside of the corrosion-proof layer, the base material layer is made of rubber, the corrosion-proof layer is made of epoxy resin, and the waterproof layer is made of polyurethane, the corrosion-proof layer improves the corrosion resistance of the sealing disc, and the waterproof layer improves the waterproof performance of the sealing disc.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] The power gear is located at the inner side position of the pump body during installation, the sealing ring is deformed by being extruded by the extrusion edge pad on both sides, thereby sealing the connection between the middle pin shaft and the pump body, and the phenomenon of oil leakage of oil in the oil cavity during use is prevented, the sealing ring and the extrusion edge pad are used to replace the traditional copper sleeve and oil seal, cost is greatly saved, assembly and maintenance are convenient, and efficiency is improved, oil is supplied through the oil inlet pipe, oil is discharged through the oil outlet pipe, and the oil in the middle cylinder is filtered by the filter element during oil absorption, and damage to the oil pump is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the exploded view of the utility model;

[0014] Figure 2 is the top view of the pump body of the utility model;

[0015] Figure 3 is the internal structure view of the middle cylinder of the utility model;

[0016] Figure 4 is the component structure view of the sealing disc of the utility model.

[0017] In the drawing: 1, pump body; 2, oil cavity; 3, middle pin shaft; 4, power gear; 5, first oil supply gear; 6, second oil supply gear; 7, fixed shaft; 8, sealing plate; 9, oil inlet pipe; 10, oil outlet pipe; 11, first fixed hole; 12, second fixed hole; 13, pin hole; 14, sealing ring; 15, extrusion edge pad; 16, sealing disc; 17, middle cylinder; 18, penetrating hole; 19, filter element; 20, material opening; 21, bottom cover; 22, base material layer; 23, corrosion-proof layer; 24, waterproof layer; 25, positioning hole. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0019] Please refer to Figures 1-4 The utility model provides a sewing machine oil pump, including pump body 1, the middle part of both sides of pump body 1 is equipped with oil chamber 2, the middle part of pump body 1 is connected with the middle pin shaft 3, the outside cover of oil chamber 2 is equipped with sealing plate 8, the both ends of middle pin shaft 3 are all equipped with sealing ring 14, one side of sealing ring 14 is equipped with extrusion edge pad 15, the middle part of middle pin shaft 3 is installed with power gear 4, the inside of oil chamber 2 is equipped with first oil supply gear 5 and second oil supply gear 6, the surface of oil chamber 2 inner wall is installed with fixed shaft 7, second oil supply gear 6 is connected with fixed shaft 7, middle pin shaft 3 extends to the inside of oil chamber 2, and first oil supply gear 5 is connected with the end of middle pin shaft 3, one side of sealing plate 8 is equipped with oil inlet pipe 9, the other side of sealing plate 8 is equipped with oil outlet pipe 10, the middle part of oil inlet pipe 9 is equipped with middle cylinder 17, the inside of middle cylinder 17 is installed with filter element 19, the side of sealing plate 8 close to pump body 1 is equipped with sealing disc 16;

[0020] In the embodiment, the whole oil pump is an oil supply pump on the sewing machine. In the use process, the gear connected externally is engaged with the power gear 4 to make it rotate. The power gear 4 rotates at the same time to make the middle pin shaft 3 rotate, and then the first oil supply gear 5 connected to the both ends of the middle pin shaft 3 rotates. The first oil supply gear 5 is engaged with the second oil supply gear 6, and then the first oil supply gear 5 and the second oil supply gear 6 rotate in the oil chamber 2 to perform oil suction and discharge work.

[0021] Please refer to Figures 1-4 The sealing ring 14 is connected to the surface of the inside of the pump body 1. The middle part of the pump body 1 is provided with a penetrating hole 18 matched with the middle pin shaft 3. The penetrating hole 18 corresponds to the oil chamber 2. The surfaces of the both sides of the pump body 1 are provided with first fixing holes 11. The surface of the sealing plate 8 is provided with second fixing holes 12 corresponding to the first fixing holes 11. The top of the pump body 1 is provided with a pin hole 13. One side of the power gear 4 is provided with a positioning hole 25.

[0022] In the embodiment, the sealing plate 8 can be fixed outside the oil chamber 2 of the pump body 1 by adding screws through the first fixing holes 11 and the second fixing holes 12. The oil inlet pipe 9 and the oil outlet pipe 10 extend to the inside of the oil chamber 2. The middle pin shaft 3 and the power gear 4 are connected through the positioning hole 25.

[0023] Please refer to Figures 1-4The sealing disc 16 is matched with the oil cavity 2, the sealing plate 8 is matched with the side of the pump body 1, the bottom of the middle cylinder 17 is threadedly connected with a bottom cover 21, both sides of the middle cylinder 17 are provided with material openings 20 corresponding to the oil inlet pipe 9 and the oil outlet pipe 10, the sealing disc 16 comprises a base material layer 22, a corrosion prevention layer 23 connected to the outside of the base material layer 22 and a waterproof layer 24 connected to the outside of the corrosion prevention layer 23, the base material layer 22 is made of rubber, the corrosion prevention layer 23 is made of epoxy resin, and the waterproof layer 24 is made of polyurethane;

[0024] In the embodiment, oil is introduced through the oil inlet pipe 9, oil is discharged through the oil outlet pipe 10, and the oil in the middle cylinder 17 can be filtered by the filter element 19 during the oil suction process, thereby reducing damage to the oil pump.

[0025] In use, the oil pump for the sewing machine is an oil supply pump on the sewing machine. During use, the oil pump is rotated by engaging the external gear with the power gear 4, the power gear 4 is rotated, the middle pin shaft 3 is rotated, the first oil supply gear 5 connected to the two ends of the middle pin shaft 3 is rotated, the first oil supply gear 5 is engaged with the second oil supply gear 6, the first oil supply gear 5 and the second oil supply gear 6 are rotated in the oil cavity 2 to perform oil suction and discharge, oil is introduced through the oil inlet pipe 9, oil is discharged through the oil outlet pipe 10, and the oil in the middle cylinder 17 can be filtered by the filter element 19 during the oil suction process, thereby reducing damage to the oil pump. The sealing ring 14 and the extrusion sealing gasket 15 are arranged at the two ends of the middle pin shaft 3, the power gear 4 is arranged at the inner side of the pump body 1 during installation, the two sides of the extrusion sealing gasket 15 are pressed to extrude and deform the sealing ring 14, thereby sealing the connection between the middle pin shaft 3 and the pump body 1, and thereby preventing the oil in the oil cavity 2 from leaking out during use. The sealing ring 14 and the extrusion sealing gasket 15 are used instead of the traditional copper sleeve and oil seal, thereby greatly saving costs, facilitating assembly and maintenance, and improving efficiency.

[0026] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An oil pump for a sewing machine comprising a pump body (1), characterized in that: The middle part of the pump body (1) is provided with an oil cavity (2) on both sides, the middle part of the pump body (1) is connected with a middle pin shaft (3), the outer side cover of the oil cavity (2) is provided with a sealing plate (8), both ends of the middle pin shaft (3) are provided with a sealing ring (14), one side of the sealing ring (14) is provided with an extrusion sealing edge pad (15), the middle part of the middle pin shaft (3) is provided with a power gear (4), the inside of the oil cavity (2) is provided with a first oil supply gear (5) and a second oil supply gear (6), the surface of the inner wall of the oil cavity (2) is provided with a fixed shaft (7), the second oil supply gear (6) is connected with the fixed shaft (7), the middle pin shaft (3) extends to the inside of the oil cavity (2), and the first oil supply gear (5) is connected with the end of the middle pin shaft (3), one side of the sealing plate (8) is provided with an oil inlet pipe (9), the other side of the sealing plate (8) is provided with an oil outlet pipe (10), the middle part of the oil inlet pipe (9) is provided with a middle cylinder (17), the inside of the middle cylinder (17) is provided with a filter core (19), the side of the sealing plate (8) close to the pump body (1) is provided with a sealing disc (16).

2. The oil pump for a sewing machine according to claim 1, characterized by: The sealing ring (14) is connected with the surface of the inner side of the pump body (1), and the middle part of the pump body (1) is provided with a penetrating hole (18) matched with the middle pin shaft (3), and the penetrating hole (18) corresponds to the oil cavity (2).

3. The oil pump for a sewing machine according to claim 1, characterized by: The surface of both sides of the pump body (1) is provided with a first fixed hole (11), and the surface of the sealing plate (8) is provided with a second fixed hole (12) corresponding to the first fixed hole (11).

4. The oil pump for a sewing machine according to claim 1, characterized by: The top of the pump body (1) is provided with a pin hole (13), and one side of the power gear (4) is provided with a positioning hole (25).

5. The oil pump for a sewing machine according to claim 1, characterized by: The sealing disc (16) is matched with the oil cavity (2), and the sealing plate (8) is matched with the side of the pump body (1).

6. The oil pump for a sewing machine according to claim 1, characterized by: The bottom of the middle cylinder (17) is threadedly connected with a bottom cover (21), and both sides of the middle cylinder (17) are provided with material openings (20) corresponding to the oil inlet pipe (9) and the oil outlet pipe (10).

7. The oil pump for a sewing machine according to claim 1, characterized by: The sealing disc (16) comprises a base material layer (22), a corrosion prevention layer (23) connected to the outer side of the base material layer (22), and a waterproof layer (24) connected to the outer side of the corrosion prevention layer (23), the base material layer (22) is made of rubber, the corrosion prevention layer (23) is made of epoxy resin, and the waterproof layer (24) is made of polyurethane.

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