Pure electric oil-cooled motor reducer input shaft inner oil guide pipe structure

Abstract

The pure electric oil-cooled motor reducer input shaft inner oil guide pipe structure, including oil guide pipe, input shaft, reducer box, motor shaft, first bearing, second bearing, the first bearing, second bearing are fixed at both ends of the input shaft respectively and with the reducer box interference fit, the oil guide pipe, motor shaft and input shaft hole cooperation, the motor shaft and oil guide pipe connection, the first bearing, second bearing are connected with input shaft respectively, still include;The reducer box is equipped with oil inlet hole, one end of the oil guide pipe is equipped with through hole, the oil inlet hole and through hole intercommunication;The middle end of the oil guide pipe is equipped with first radial oil hole, the oil guide pipe and input shaft form first oil cavity, the first radial oil hole and first oil cavity intercommunication;The other end of the oil guide pipe is equipped with oil guide groove, the oil guide groove and motor shaft intercommunication.The present application can be to the input shaft inner hole, motor shaft inner hole and second bearing play the function of sufficient lubrication.

Description

TECHNICAL FIELD

[0001] The application relates to the motor technology field, in particular to an oil guide pipe structure in an input shaft of a pure electric oil-cooled motor reducer. BACKGROUND

[0002] New energy vehicles refer to vehicles driven by unconventional vehicle fuels, and currently, the common method is to utilize electric energy to drive the motor to drive the vehicle to travel, but as the popularization of electric vehicles and the maturity of technology, the motor brings faster speed and larger torque, so the cooling and lubrication requirements of the reducer and the motor part will be higher and higher.

[0003] In the prior art, the oil-cooled motor mainly increases the oil pump and adopts active lubrication, but due to the high speed of the input shaft, the frequent change of the motor speed and the unreasonable cooling and lubrication design, the service life of the input shaft side bearing and the cooperation part of the motor shaft and the input shaft is greatly reduced due to the poor cooling and lubrication effect; therefore, the oil-cooled motor of the prior art has defects and needs to be further improved. SUMMARY

[0004] The application provides an oil guide pipe structure in an input shaft of a pure electric oil-cooled motor reducer, which can more fully lubricate the oil-cooled motor and improve the service life of the motor.

[0005] The technical scheme for solving the above technical problems is as follows:

[0006] The oil guide pipe structure in the input shaft of the pure electric oil-cooled motor reducer comprises an oil guide pipe, an input shaft, a reducer box, a motor shaft, a first bearing and a second bearing, the first bearing and the second bearing are fixed at two ends of the input shaft and are in interference fit with the reducer box, the oil guide pipe and the motor shaft are in fit with the shaft hole of the input shaft, the motor shaft is connected with the oil guide pipe, the first bearing and the second bearing are respectively connected with the input shaft, and the oil guide pipe structure further comprises:

[0007] The reducer box is provided with an oil inlet hole, one end of the oil guide pipe is provided with a through hole, and the oil inlet hole and the through hole are communicated;

[0008] A first radial oil hole is arranged at the middle end of the oil guide pipe, a first oil cavity is formed between the oil guide pipe and the input shaft, and the first radial oil hole and the first oil cavity are communicated;

[0009] The other end of the oil guide pipe is provided with an oil guide groove, and the oil guide groove is communicated with the motor shaft;

[0010] A second radial oil hole is arranged on the motor shaft, a second oil cavity is formed between the motor shaft, the second bearing and the input shaft, and the second radial oil hole and the second oil cavity are communicated.

[0011] Further, the oil guide pipe is provided with a first protruding part and a second protruding part, the first protruding part and the second protruding part are arranged on the oil guide pipe, a plurality of first weight-reducing grooves are arranged on the axial end face of the first protruding part, a second weight-reducing groove is arranged on the axial end face of the second protruding part, and an annular groove is arranged on the circumferential face of the second protruding part, and the first protruding part and the second protruding part abut against the inner hole wall of the input shaft.

[0012] Further, the motor shaft is provided with a second radial oil hole, a second oil cavity is formed between the motor shaft, the second bearing and the input shaft, and the second radial oil hole is communicated with the second oil cavity.

[0013] Further, the inner hole of the motor shaft is provided with a stop shoulder, and the stop shoulder cooperates with the oil guide pipe.

[0014] The present application provides an oil guide pipe structure of a pure electric oil-cooled motor reducer input shaft, first, lubricating oil enters from the oil inlet hole on the reducer box, then flows into the oil guide pipe, then part of the lubricating oil flows into the first oil cavity formed between the oil guide pipe and the input shaft through the first radial oil hole on the oil guide pipe, to cool and lubricate the outer wall of the oil guide pipe and the inner hole wall of the input shaft, and finally flows into the reducer box; secondly, another part of the lubricating oil flows into the shaft hole of the motor shaft through the oil guide groove of the oil guide pipe, to cool and lubricate the shaft inner hole of the motor shaft, then the lubricating oil flowing into the motor shaft will also flow into the second oil cavity formed between the motor shaft, the second bearing and the input shaft through the second radial oil hole on the motor shaft, to lubricate the outer wall of the motor shaft, the inner hole of the input shaft and the second bearing, and finally flow into the reducer box

[0015] The present application is particularly suitable for lubrication of a pure electric oil-cooled motor, and the flow of lubricating oil can be controlled by designing the size of the first radial oil hole, the second radial oil hole and the oil guide groove, so as to achieve sufficient lubrication of the input shaft, the motor shaft and the second bearing. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a sectional view of the present application;

[0017] Figure 2 It is a front view of the oil guide pipe;

[0018] Figure 3 It is a left view of the first protruding part;

[0019] Figure 4 It is a right view of the second protruding part.

[0020] Markings in the drawings:

[0021] Oil pipe 1, through hole 1-1-1, first protruding part 1-1-3, second protruding part 1-1-4, first weight-reducing groove 1-1-3-1, annular groove 1-1-4-1, second weight-reducing groove 1-1-4-2, first radial oil hole 1-1-5, oil guide groove 1-1-2-1, input shaft 2-1, reducer box 3, motor shaft 4, first bearing 2-2, second bearing 2-3, oil inlet hole 3-1, shoulder 4-1, second radial oil hole 4-2, first oil cavity A, second oil cavity G, notch 20. DETAILED DESCRIPTION

[0022] The application will be further described below in conjunction with the drawings and specific embodiments.

[0023] As shown in Figure 1 and Figure 2 , the pure electric oil-cooled motor reducer input shaft inner oil guide pipe structure comprises an oil guide pipe 1, an input shaft 2-1, a reducer box 3, a motor shaft 4, a first bearing 2-2 and a second bearing 2-3, the first bearing 2-2 and the second bearing 2-3 are fixed on the reducer box 3, the oil guide pipe 1 and the motor shaft 4 are matched with the shaft hole of the input shaft 2-1, the motor shaft 4 is connected with the oil guide pipe 1, the first bearing 2-2 and the second bearing 2-3 are connected with the input shaft 2-1 respectively, and further comprising:

[0024] The reducer box 3 is provided with an oil inlet hole 3-1, one end of the oil guide pipe 1 is provided with a through hole 1-1-1, and the oil inlet hole 3-1 is communicated with the through hole 1-1-1;

[0025] The middle end of the oil guide pipe 1 is provided with a first radial oil hole 1-1-5, the oil guide pipe 1 and the input shaft 2-1 form a first oil cavity A, and the first radial oil hole 1-1-5 is communicated with the first oil cavity A;

[0026] The other end of the oil guide pipe 1 is provided with an oil guide groove 1-1-2-1, and the oil guide groove 1-1-2-1 is communicated with the motor shaft 4.

[0027] In the embodiment, the oil guide pipe 1 is in interference fit with the motor shaft 4, and the oil guide pipe 1 rotates with the motor shaft 4. When the lubricating oil flows in through the oil inlet hole 3-1, it first reaches the through hole 1-1-1 on the oil guide pipe 1, and then flows into the lumen of the oil guide pipe 1 through the through hole 1-1-1. Then, under the effect of pressure, part of the lubricating oil flows into the first oil cavity A through the first radial oil hole 1-1-5, so as to lubricate the outer wall surface of the oil guide pipe 1 and the inner hole wall surface of the input shaft 2-1. Another part of the lubricating oil flows into the inner hole of the motor shaft 4 through the oil guide groove 1-1-2-1, first lubricating the inner hole of the motor shaft 4, and then flowing into the second oil cavity G through the second radial oil hole 4-2 on the motor shaft 4, so as to lubricate the outer wall surface of the motor shaft 4, the inner hole wall surface of the input shaft 2-1 and the second bearing 2-3. In the embodiment, the input shaft 2-1, the motor shaft 4 and the oil guide pipe 1 rotate simultaneously.

[0028] As shown in Figures 2 to 4 The oil guide pipe 1 is provided with a first protruding part 1-1-3 and a second protruding part 1-1-4. The first protruding part 1-1-3 and the second protruding part 1-1-4 are annularly arranged on the oil guide pipe 1. The axial end surface of the first protruding part 1-1-3 is provided with a plurality of first weight-reducing grooves 1-1-3-1. The axial end surface of the second protruding part 1-1-4 is provided with a second weight-reducing groove 1-1-4-2. The circumferential surface of the second protruding part 1-1-4 is provided with an annular groove 1-1-4-1. The first protruding part 1-1-3 and the second protruding part 1-1-4 abut against the inner hole wall of the input shaft 2-1.

[0029] In the present embodiment, the first protrusion 1-1-3 is preferably designed in a quincunx shape, and the quincunx design causes a plurality of notches 20 to be formed on the axial end face of the first protrusion 1-1-3. After the lubricating oil flows into the first oil cavity A through the first radial oil hole 1-1-5, the lubricating oil flows out of the notches 20 into the reducer housing (because the first protrusion 1-1-3 is in a quincunx shape, the notches 20 of the first protrusion 1-1-3 form gaps with the inner hole of the input shaft 2-1, and the lubricating oil flows out of the gaps into the reducer housing 3 under the influence of pressure). In the present embodiment, the second protrusion 1-1-4 is preferably designed in a disc shape, but an annular groove 1-1-4-1 is arranged on the peripheral surface of the second protrusion 1-1-4, and the annular groove 1-1-4-1 is used to install a sealing ring (the sealing ring is preferably a high-temperature-resistant rubber O-shaped sealing ring). After the annular groove 1-1-4-1 of the second protrusion 1-1-4 is installed with the sealing ring, the lubricating oil that flows into the first oil cavity A through the first radial oil hole 1-1-5 only flows out of the notches 20. In the present embodiment, the axial end faces of the first protrusion 1-1-3 and the second protrusion 1-1-4 are respectively designed with a first weight-reducing groove 1-1-3-1 and a second weight-reducing groove 1-1-4-2. The first weight-reducing groove 1-1-3-1 and the second weight-reducing groove 1-1-4-2 are mainly used to reduce the total weight of the oil guide pipe 1, and secondarily, a small amount of lubricating oil can be stored in the first weight-reducing groove 1-1-3-1 and the second weight-reducing groove 1-1-4-2 when the oil inlet hole 3-1 stops supplying oil.

[0030] As shown in Figure 1 , the inner hole of the motor shaft 4 is provided with a shoulder 4-1, and the shoulder 4-1 cooperates with the oil guide pipe 1.

[0031] In the present embodiment, when the lubricating oil reaches the shoulder 4-1 of the motor shaft 4, the lubricating oil flows back due to the shoulder 4-1 because the oil guide groove 1-1-2-1 is arranged on the oil guide pipe 1, and the lubricating oil enters the inner hole of the input shaft 2-1 from the oil guide groove 1-1-2-1. When the lubricating oil reaches the second weight-reducing groove 1-1-4-2, the lubricating oil changes direction again and flows to the cooperation position of the internal spline of the input shaft 2-1 and the external spline of the motor shaft 4, thereby completing the cooling and lubrication of the spline.

[0032] Of course, the size of the inner hole of the oil guide pipe 1, and the sizes of the first radial oil hole 1-1-5, the second radial oil hole 4-2, and the oil guide groove 1-1-2-1 are not specified in the present embodiment, and in application, the sizes of the first radial oil hole 1-1-5, the second radial oil hole 4-2, and the oil guide groove 1-1-2-1 can be designed according to the flow rate of the lubricating oil required by the oil-cooled motor, so as to achieve sufficient lubrication of each part.

[0033] Finally, it should be noted that the above-described embodiments are merely preferred embodiments of the present application for describing the technical solutions of the present application, and are not intended to limit the present application, and are not intended to limit the protection scope of the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the corresponding technical solutions deviate from the protection scope of the claims.

Claims

1. A pure electric oil-cooled motor reducer input shaft internal oil guide pipe structure, comprising an oil guide pipe (1), an input shaft (2-1), a reducer housing (3), a motor shaft (4), a first bearing (2-2), and a second bearing (2-3), wherein the first bearing (2-2) and the second bearing (2-3) are respectively fixed at both ends of the input shaft (2-1) and are interference-fitted with the reducer housing (3), the oil guide pipe (1) and the motor shaft (4) are fitted with the shaft hole of the input shaft (2-1), the motor shaft (4) is connected to the oil guide pipe (1), and the first bearing (2-2) and the second bearing (2-3) are respectively connected to the input shaft (2-1), characterized in that, Also includes; The reducer housing (3) is provided with an oil inlet hole (3-1), and one end of the oil guide pipe (1) is provided with a through hole (1-1-1). The oil inlet hole (3-1) is connected to the through hole (1-1-1). The middle end of the oil guide pipe (1) is provided with a first radial oil hole (1-1-5), and a first oil cavity (A) is formed between the oil guide pipe (1) and the input shaft (2-1). The first radial oil hole (1-1-5) is connected to the first oil cavity (A). The other end of the oil guide pipe (1) is provided with an oil guide groove (1-1-2-1), which is connected to the motor shaft (4); The motor shaft (4) is provided with a second radial oil hole (4-2), and a second oil cavity (G) is formed between the motor shaft (4), the second bearing (2-3), and the input shaft (2-1). The second radial oil hole (4-2) is connected to the second oil cavity (G).

2. The oil guide pipe structure inside the input shaft of the pure electric oil-cooled motor reducer according to claim 1, characterized in that, The oil guide pipe (1) is provided with a first protrusion (1-1-3) and a second protrusion (1-1-4). The first protrusion (1-1-3) and the second protrusion (1-1-4) are arranged around the oil guide pipe (1). The axial end face of the first protrusion is provided with a plurality of first weight-reducing grooves (1-1-3-1). The axial end face of the second protrusion (1-1-4) is provided with a second weight-reducing groove (1-1-4-2). The circumferential surface of the second protrusion (1-1-4) is provided with an annular groove (1-1-4-1). The first protrusion (1-1-3) and the second protrusion (1-1-4) abut against the inner wall of the input shaft (2-1).

3. The oil guide pipe structure inside the input shaft of the pure electric oil-cooled motor reducer according to claim 1, characterized in that, The inner hole of the motor shaft (4) is provided with a shoulder (4-1), which is in cooperation with the oil guide pipe (1).

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