A speed reduction motor with an oil leakage prevention device and an oil leakage prevention method thereof

Abstract

The application discloses a speed reduction motor with an oil leakage prevention device and an oil leakage prevention method thereof, which comprises a motor, a shell, a gearbox, a sealed box and an output spindle, the gearbox and the sealed box are arranged in the gearbox shell of the shell, the gearbox and the sealed box are in communication with the whole oil liquid inside, the sealed box is provided with an oil leakage prevention device, the oil leakage prevention device comprises an oil pan, a rotating disc and a fixing cylinder, the output end of the gearbox and the sealed box is provided with the output spindle, and an oil seal and a bearing are arranged on the output spindle. Compared with the prior art, the oil leakage prevention device is arranged in the sealed box which is in communication with the whole oil liquid inside the gearbox, so that the separation of iron filings and impurities in the oil liquid can be realized without affecting the flow field inside the gearbox. Furthermore, the sealed box is arranged separately, so that the iron filings and impurities on the magnetic attraction device can be conveniently removed without disassembling the whole gearbox.

Description

TECHNICAL FIELD

[0001] The application relates to the field of oil leakage prevention of a reduction motor, in particular to a reduction motor with an oil leakage prevention device and an oil leakage prevention method thereof. BACKGROUND

[0002] The motor of a reduction motor is connected with a reduction machine at a position of an end face dynamic sealing oil seal, and oil leakage often occurs, including the following types: 1. When the high-speed end oil seal is at a low position of the reduction motor, the oil seal is immersed in lubricating oil, and after a period of use, iron filings are deposited at the sealing ring position due to wear, so that the sealing element is early worn out and fails, and oil leakage occurs; 2. When the high-speed end oil seal is at a high position of the reduction motor, the oil seal is not immersed in lubricating oil, and lubrication is insufficient, the oil seal is dry and the lip is burned, so that the sealing element is early worn out and fails, and oil leakage occurs. How to prevent early failure of the oil seal and oil leakage is the most important in the design of the oil leakage prevention device of the reduction motor. SUMMARY

[0003] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows:

[0004] A reduction motor with an oil leakage prevention device, comprising a motor, a housing, a reduction gearbox, a sealing box and an output main shaft, the reduction gearbox and the sealing box are arranged in the reduction gearbox shell of the housing, the inside of the reduction gearbox and the sealing box is in overall oil communication, the sealing box is provided with an oil leakage prevention device, the oil leakage prevention device comprises an oil pan, a rotating disc and a fixed cylinder, the output end of the reduction gearbox and the sealing box is provided with the output main shaft, and an oil seal and a bearing are arranged on the output main shaft.

[0005] Preferably, the oil seal comprises a main lip and a secondary lip, the main lip and the secondary lip are arranged on the two sides of the bearing respectively, and form a sealed oil injection space with the bearing and the outer end face of the sealing box. Wherein, the grease can be added between the main lip and the secondary lip through an oil injection system, and the specific steps comprise: ① by comparing with the internal memory of the oil injection system, the distance between the lip depth and the main lip and the secondary lip and the shape are measured by using the distance measuring sensor arranged in the output main shaft, so as to identify the size and model of the oil seal; ② the volume of the oil injection space is calculated by measuring the distance between the lip depth and the main lip and the secondary lip and the shape by the distance measuring sensor; ③ the filling amount is obtained according to the volume of the oil injection space; ④ and the filling is carried out through the oil injection channel arranged in the output main shaft; the grease can be accurately input when different oil seals are used by using the oil injection system in the application, which facilitates the replacement of the size and model of the oil seal, prevents the leakage caused by too much grease injection, and facilitates the replacement or re-oiling of the oil seal when the sealing box is disassembled, which is convenient for the replacement or re-oiling of the oil seal when the sealing box is disassembled.

[0006] Further, the main lip includes a first end portion and a first sealing piece and a second sealing piece arranged on both sides of the first end portion respectively, and the auxiliary lip includes a second end portion and a first sealing piece and a second sealing piece arranged on both sides of the second end portion respectively, and the first end portion and the second end portion are arranged on both sides of the bearing respectively and oppositely to form an oil injection space.

[0007] Preferably, the sealing box includes a first outer end plate, a second outer end plate, a third outer end plate, a fourth outer end plate, a fifth outer end plate and a first inner end plate, the gearbox includes a first outer end face, a second outer end face, a third outer end face, a fourth outer end face and a fifth outer end face, and the first outer end plate, the second outer end plate, the third outer end plate and the fourth outer end plate are fixedly and sealingly connected with the first outer end face, the second outer end face, the third outer end face and the fourth outer end face through the first inner end plate. The first outer end plate, the second outer end plate, the third outer end plate, the fourth outer end plate and the fifth outer end plate and the first outer end face, the second outer end face, the third outer end face, the fourth outer end face and the fifth outer end face together form an oil tank in which oil can flow.

[0008] Further, an input end of the gearbox is in transmission connection with an output shaft of the motor, the oil leakage prevention device is fixedly arranged in the sealing box, the oil pan is fixed on the output main shaft, the fixing cylinder is detachably arranged in the sealing box, the rotating disc is detachably connected to one side of the fixing cylinder, the oil pan is in rotational connection with the rotating disc and the fixing cylinder, the rotating disc is arranged on the radial outer side of the oil pan, and the rotating disc and the fixing cylinder are provided with magnetic attraction devices, which can agitate the oil in the sealing box to form a fluid field when the oil pan rotates.

[0009] Further, the oil pan is in the shape of a disc with fan-shaped protrusions, and the oil pan includes an oil pan body and fan-shaped protrusions arranged on one side of the oil pan body, the oil pan body is internally provided with an axle hole through which the output main shaft passes and is fixed, the fan-shaped protrusion includes a first end portion and an oppositely arranged second end portion, the size of the first end portion is 3.5 times the size of the second end portion, the first end portion and the oppositely arranged second end portion are connected by edge portions on both sides respectively, the edge portions between adjacent fan-shaped protrusions have passages, and the fan-shaped protrusions are arranged on the circumferential outer side of the axle hole and are uniformly arranged along the circumference of the oil pan body. Preferably, the edge portions on both sides of the passages are parallel to each other, and the width of the passages is 8-15 mm.

[0010] Further, the rotating disc comprises a spherical end and a cylindrical tail, a circular hole is formed in the top end of the spherical end, the radius of the circular hole is 3-5mm larger than the radius of the oil pan, the tail end of the spherical end is fixedly connected with the cylindrical tail, and the rotating disc is fixedly arranged in the sealed box through the cylindrical tail, the spherical end is made of magnet material, and a magnetic body is arranged on the upper and lower sides of the cylindrical tail.

[0011] Beneficial effects

[0012] (1) The present application is provided relative to the prior art, because by providing a separate sealed box communicating with the internal oil of the gearbox, and providing an oil leakage prevention device in the sealed box, the separation of iron filings and impurities in the oil can be realized without affecting the flow field in the gearbox. Further, since the sealed box is separately provided, the iron filings and impurities on the magnetic attraction device can be easily removed without disassembling the entire gearbox.

[0013] (2) Because the density and unit mass of iron filings are larger than those of oil, the iron filings can be attracted by the magnetic attraction device provided on the rotating disc outside the oil pan and the fixed cylinder after being thrown out by the oil pan, thereby reducing the iron filings in the oil and preventing early wear and failure of the oil seal and other sealing elements.

[0014] (3) The oil pan provided by the present application is provided in the form of a disc with fan-shaped protrusions, which can improve the working efficiency of the oil pan, increase the stirring ratio of the oil pan, and increase the oil rotation efficiency in the sealed box. The iron filings move along the channel and are more easily thrown out in a directional manner without being thrown flying; by providing a rotating disc outside the oil pan, the iron filings and impurities generated by the oil pan can be attracted to the magnetic attraction device, and by providing a detachable rotating disc, the impurities can be easily cleaned. At the same time, the spherical end and the channel improve the adsorption efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The overall structure of the speed reduction motor of the oil leakage prevention device of the present application Figure 1 ;

[0016] Figure 2 The local structure of the speed reduction motor of the oil leakage prevention device of the present application Figure 1 (For the sake of clear illustration, the click and the shell are removed)

[0017] Figure 3 The local structure of the speed reduction motor of the oil leakage prevention device of the present application Figure 2 ;

[0018] Figure 4 The local structure of the speed reduction motor of the oil leakage prevention device of the present application Figure 3 ;

[0019] Figure 5Assembled structure of the oil leakage prevention device for the reduction motor of the oil leakage prevention device of the present application

[0020] Figure 6 Structure of the oil leakage prevention device for the reduction motor of the oil leakage prevention device of the present application Figure 1 ;

[0021] Figure 7 Structure of the oil leakage prevention device for the reduction motor of the oil leakage prevention device of the present application Figure 2 ;

[0022] Figure 8 Structure of the oil leakage prevention device for the reduction motor of the oil leakage prevention device of the present application Figure 3 ;

[0023] Figure 9 Oil seal structure for the reduction motor of the oil leakage prevention device of the present application Figure 1 ;

[0024] Figure 10 Oil seal structure for the reduction motor of the oil leakage prevention device of the present application Figure 2 . DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0026] As Figures 1-10 , a reduction motor with an oil leakage prevention device comprises a motor A, a housing B, a gearbox 1, a sealing box 2, and an output main shaft 3. The gearbox 1 and the sealing box 2 are arranged in a gearbox shell C of the housing B, and the inside of the gearbox 1 and the inside of the sealing box 2 are in overall oil communication (see FIG. 1). Figure 1In order to facilitate the illustration of the structure of the gearbox 1 and the sealing box 2, the distance between the gearbox 1 and the sealing box 2 is lengthened, and in fact, the gearbox 1 and the sealing box 2 are closely connected together), the sealing box 2 is provided with an oil leakage prevention device 8, the oil leakage prevention device 8 comprises an oil pan 9, a rotating disc 10 and a fixed cylinder 11, the output end of the gearbox 1 and the sealing box 2 is provided with the output main shaft 3, and the oil seal 5 and the bearing 6 are arranged on the output main shaft 3. Compared with the prior art, since the sealing box 2 which is in communication with the overall oil in the gearbox 1 is arranged separately, and the oil leakage prevention device 8 is arranged in the sealing box, the separation of iron filings and impurities in the oil can be realized without affecting the flow field in the gearbox 1. Further, since the sealing box 2 is arranged separately, when the iron filings and impurities on the magnetic attraction device are removed, the sealing box 2 can be easily disassembled, and the gearbox is not disassembled as a whole.

[0027] Preferably, the oil seal 5 comprises a main lip 501 and a secondary lip 502, and the main lip 501 and the secondary lip 502 are arranged on both sides of the bearing 6 and form a sealed oil injection space with the outer end surface of the bearing 6 and the sealing box 2. Among them, the grease can be added between the main lip and the secondary lip through the oil injection system, and the specific steps include: ① by comparing with the internal memory of the oil injection system, using the distance measuring sensor 7 arranged in the output main shaft 3 to measure the lip depth and the distance between the main lip and the secondary lip, and the shape, so as to identify the oil seal size; ② by measuring the lip depth and the distance between the main lip and the secondary lip, and the shape of the distance measuring sensor 7, the volume of the oil injection space is calculated; ③ according to the volume of the oil injection space, the filling amount is obtained; ④ and through the oil injection channel arranged in the output main shaft 3, the filling is carried out; through the oil injection system in the application, the accurate input of the grease can be realized when different oil seals are used, the replacement of the oil seal type and size is facilitated, the leakage of the grease is prevented, and at the same time, the sealing box 2 which can be disassembled is arranged in the separate gearbox 1 in the application, so that the replacement or re-oiling of the oil seal can be carried out when the sealing box 2 is disassembled.

[0028] Further, the main lip 501 comprises a main lip first end 5011 and a main lip first sealing piece 5012 and a main lip second sealing piece 5013 arranged on both sides of the main lip first end 5011, and the secondary lip 502 comprises a secondary lip second end 5021 and a secondary lip first sealing piece 5022 and a secondary lip second sealing piece 5023 arranged on both sides of the secondary lip second end 5021, and the main lip first end 5011 and the secondary lip second end 5021 are arranged on both sides of the bearing 6 and are oppositely arranged to form an oil injection space (see FIG. 2). Figure 8In order to show the first sealing piece 5022 of the secondary lip, the second sealing piece 5023 of the secondary lip, the lip 502 is shown upside down), compared with the prior art which only prevents oil leakage by end face sealing, the present application can provide a larger supporting space for the supporting spring through the setting of the first sealing piece 5012 of the primary lip, the second sealing piece 5013 of the primary lip, the first sealing piece 5022 of the secondary lip and the second sealing piece 5023 of the secondary lip, and the sealing performance of the shaft connection and the bearing connection can be ensured respectively through the sealing by the larger cross section.

[0029] Preferably, the sealing box 2 comprises a first outer end plate 201, a second outer end plate 202, a third outer end plate 203, a fourth outer end plate 204, a fifth outer end plate 205 and a first inner end plate 206, the gearbox 1 comprises a first outer end face 101, a second outer end face 102, a third outer end face 103, a fourth outer end face 104 and a fifth outer end face 105, and the first outer end plate 201, the second outer end plate 202, the third outer end plate 203 and the fourth outer end plate 204 are fixedly and sealingly connected with the first outer end face 101, the second outer end face 102, the third outer end face 103 and the fourth outer end face 104 through the first inner end plate 206. The first outer end plate 201, the second outer end plate 202, the third outer end plate 203, the fourth outer end plate 204 and the fifth outer end plate 205 together with the first outer end face 101, the second outer end face 102, the third outer end face 103, the fourth outer end face 104 and the fifth outer end face 105 form an oil tank which is in communication with the whole oil, and the connection between the gearbox 1 and the sealing box 2 through the first inner end plate 206 can ensure the stability of the gearbox 1 when the sealing box 2 is disassembled, and also strengthen the sealing between the gearbox 1 and the sealing box 2 to prevent oil leakage between the gearbox 1 and the sealing box 2.

[0030] Further, the input end of the gearbox 1 is in transmission connection with the output shaft of the motor 4, the oil leakage prevention device 8 is fixedly arranged in the sealing box 2, the oil pan 9 is fixed on the output main shaft 3, the fixed cylinder 11 is detachably arranged in the sealing box 2, the rotating disc 10 is detachably connected to one side of the fixed cylinder 11, the oil pan 9 is in rotary connection with the rotating disc 10 and the fixed cylinder 11, the rotating disc 10 is arranged on the radial outer side of the oil pan 9, and the rotating disc 10 and the fixed cylinder 11 are provided with magnetic attraction devices. When the oil pan 9 rotates, the oil in the sealing box 2 can be stirred to form a fluid field. Since the density and unit mass of the iron filings are larger than those of the oil, the iron filings can be adsorbed by the magnetic attraction devices arranged on the rotating disc 10 and the fixed cylinder 11 outside the oil pan 9 after being thrown out by the oil pan 9, so as to reduce the iron filings in the oil and prevent the early wear and failure of the oil seal 5 and other sealing elements.

[0031] Further, the oil pan 9 is provided in a disc shape with fan-shaped protrusions 901, and comprises an oil pan body 902 and the fan-shaped protrusions 901 provided on one side of the oil pan body 902. The oil pan body 902 is internally provided with a shaft hole 903 for the output main shaft 3 to pass through and be fixed. The fan-shaped protrusions 901 comprise a first end portion 904 and an oppositely arranged second end portion 905. The size of the first end portion 904 is 3.5 times the size of the second end portion 905. The first end portion 904 and the oppositely arranged second end portion 905 are connected by edge portions 906 on both sides, respectively. The edge portions 906 between adjacent fan-shaped protrusions 901 have passages 907 therebetween. The fan-shaped protrusions 901 are provided outside the circumference of the shaft hole 903 and are uniformly arranged along the circumference of the oil pan body 902. Preferably, the edge portions 906 on both sides of the passages 907 are parallel to each other, and the width of the passages 907 is 8-15 mm. By providing the oil pan 9 in a disc shape with fan-shaped protrusions 901, the working efficiency of the oil pan 9 can be improved, the stirring ratio of the oil pan 9 is increased, the oil liquid rotation efficiency inside the sealed box is increased, and the iron filings moving along the passages 907 are more easily oriented and thrown out, and will not be thrown flying.

[0032] Further, the rotating disc 10 comprises a spherical end portion 1001 and a cylindrical tail portion 1002. A circular hole 1003 is formed at the top end of the spherical end portion 1001, and the radius of the circular hole 1003 is 3-5 mm larger than the radius of the oil pan 9. The tail end of the spherical end portion 1001 is fixedly connected with the cylindrical tail portion 1002, and the rotating disc 10 is fixedly arranged in the sealed box 2 through the cylindrical tail portion 1002. The spherical end portion 1001 is made of a magnet material, and magnetic attraction bodies 1004 are arranged on the upper and lower sides inside the cylindrical tail portion 1002. By providing the rotating disc 10 outside the oil pan 9, the iron filings and impurities disturbed by the oil pan 9 can be adsorbed on the magnetic attraction device, and the rotating disc 10 can be easily disassembled to facilitate cleaning of the impurities. The spherical end portion 1001 and the passages 907 improve the adsorption efficiency.

[0033] The present application sets up relative to the prior art, because by setting up a separate sealed box communicated with the whole oil in the gearbox, and setting up an oil leakage prevention device inside the sealed box, the separation of iron filings and impurities in the oil can be realized without affecting the flow field inside the gearbox. Further, because the sealed box is separately set up, the iron filings and impurities on the magnetic attraction device can be easily removed without disassembling the whole gearbox. Because the density and unit mass of iron filings are larger than oil, the iron filings can be attracted by the magnetic attraction device set on the rotating disc outside the oil pan and the fixed cylinder after being thrown out by the oil pan, reducing the iron filings in the oil and preventing the early wear and failure of the oil seal and other sealing elements. The oil pan set in the present application is set as a disc shape with fan-shaped protrusions, which can improve the working efficiency of the oil pan, increase the agitation ratio of the oil pan, increase the oil rotation efficiency inside the sealed box, and make it easier for the iron filings to be directionally thrown out along the channel without being thrown flying. By setting a rotating disc outside the oil pan, the iron filings and impurities after the disturbance of the oil pan can be attracted on the magnetic attraction device, and by setting a detachable rotating disc, the cleaning of the impurities can be easily realized. At the same time, by setting the spherical end and the channel, the adsorption efficiency is improved.

[0034] The basic principles and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A reduction motor with an oil leakage prevention device, characterized in that: The application relates to a motor, a shell and a gearbox, a sealing box and an output spindle, the gearbox and the sealing box are arranged in a gearbox shell of the shell, the gearbox and the sealing box are in overall oil liquid communication, an oil leakage prevention device is arranged in the sealing box, the oil leakage prevention device comprises an oil disc, a rotating disc and a fixing cylinder, the output end of the gearbox and the sealing box is provided with the output spindle, and an oil seal and a bearing are arranged on the output spindle. The oil seal comprises a main lip and a secondary lip, the main lip and the secondary lip are arranged on the two sides of the bearing respectively and form sealed oil injection spaces with the bearing and the outer end face of the sealing box. The input end of the gearbox is in transmission connection with the output shaft of the motor, the oil leakage prevention device is fixedly arranged in the sealing box, and the oil disc is fixed on the output spindle. The fixing cylinder is detachably arranged in the sealing box, the rotating disc is detachably connected on one side of the fixing cylinder, the oil disc is rotatably connected with the rotating disc and the fixing cylinder, the rotating disc is arranged on the radial outer side of the oil disc, and magnetic attraction devices are arranged on the rotating disc and the fixing cylinder. The oil disc is disc-shaped with fan-shaped protrusions, the oil disc comprises an oil disc body and fan-shaped protrusions arranged on one side of the oil disc body, an axle hole is arranged in the oil disc body for the output spindle to pass through and be fixed, the fan-shaped protrusions comprise a first end portion and a second end portion arranged oppositely. The size of the first end portion is 3.5 times the size of the second end portion, the first end portion and the second end portion arranged oppositely are connected by edge portions on the two sides respectively, channels are arranged between the edge portions between adjacent fan-shaped protrusions, the fan-shaped protrusions are arranged on the outer side of the circumference of the axle hole and are uniformly arranged along the circumference of the oil disc body.

2. The reduction motor with an oil leakage prevention device according to claim 1, characterized by: The main lip comprises a main lip first end portion and a main lip first sealing piece and a main lip second sealing piece arranged on the two sides of the main lip first end portion respectively, the secondary lip comprises a secondary lip second end portion and a secondary lip first sealing piece and a secondary lip second sealing piece arranged on the two sides of the secondary lip second end portion respectively, and the main lip first end portion and the secondary lip second end portion are arranged on the two sides of the bearing respectively and are arranged oppositely to form an oil injection space.

3. The reduction motor with oil leakage prevention device according to claim 2, characterized in that: The sealing box comprises a first outer end plate, a second outer end plate, a third outer end plate, a fourth outer end plate and a fifth outer end plate and a first inner end plate, the gearbox comprises a first outer end face, a second outer end face, a third outer end face, a fourth outer end face and a fifth outer end face, and the first outer end plate, the second outer end plate, the third outer end plate and the fourth outer end plate are fixedly and sealingly connected with the first outer end face, the second outer end face, the third outer end face and the fourth outer end face through the first inner end plate.

4. The reduction motor with oil leakage prevention device according to claim 3, characterized by: The first outer end plate, the second outer end plate, the third outer end plate, the fourth outer end plate and the fifth outer end plate and the first outer end face, the second outer end face, the third outer end face, the fourth outer end face and the fifth outer end face jointly form an overall oil liquid communication oil liquid box.

5. A method of preventing oil leakage from a reduction motor, characterized by: The method is suitable for the speed reduction motor with the oil leakage prevention device as claimed in any one of claims 1-4, and oil is added between the main lip and the secondary lip through an oil injection system, and the specific steps include: ① measuring the lip depth and the distance between the main lip and the secondary lip, and the shape by using a distance measuring sensor arranged in the output main shaft through comparison with the internal memory of the oil injection system, so as to identify the size model of the oil seal; ② calculating the volume of the oil injection space by measuring the lip depth and the distance between the main lip and the secondary lip, and the shape by using the distance measuring sensor; ③ obtaining the injection amount according to the volume of the oil injection space; and ④ injecting through the oil injection channel arranged in the output main shaft.

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