CN220523243U - Gear box cooling water channel structure, speed reducer and electric drive axle - Google Patents

Abstract

The utility model relates to the field of new energy automobiles, in particular to a gearbox cooling water channel structure, a speed reducer and an electric drive axle; a heat dissipation shell integrally formed with the gear box shell is arranged on the surface of the gear box shell in the gear box cooling water channel structure, and oil channels integrally formed with the gear box shell are uniformly arranged in the heat dissipation shell; the gap between the oil duct and the gap between the oil duct and the radiating shell are radiating water channels, one end of the oil duct is connected with an oil pump through an oil inlet channel, and the other end of the oil duct directly penetrates through the gearbox shell and is communicated with the interior of the gearbox; the side of the radiating shell and the oil duct, which is away from the gear box shell, is opened, and the opening of the radiating shell and the opening of the oil duct are closed by using sealing pieces, cover plates and screws. When the cooling device is used, the cooling liquid flows in the cooling water channel, the lubricating oil flows in the oil channel, and heat exchange is carried out between the cooling liquid and the lubricating oil through the shell of the oil channel, so that the purpose of cooling the lubricating oil is achieved. The whole device has the characteristics of few production procedures and simple structure.

Description

Gear box cooling water channel structure, speed reducer and electric drive axle

Technical Field

The utility model relates to the field of new energy automobiles, in particular to a cooling water channel structure of a gear box, a speed reducer and an electric drive axle.

Background

In a new energy automobile using electric power as a driving source, a power assembly of an electric car generally comprises a motor, a speed reducer, a transmission shaft, a battery and the like. When the electric vehicle runs, the reduction gear in the speed reducer rotates at a high speed and generates a large amount of heat, so that the lubricating oil in the speed reducer needs a cooling device to cool down so as to cool down the lubricating oil. As shown in fig. 1, the current method for cooling lubricating oil of a speed reducer for an electric vehicle comprises the following steps: a water cooling radiator 102 is additionally arranged outside or on the shell of the electric car speed reducer 101 to cool lubricating oil, and cooling liquid enters the water cooling radiator 102 from a water inlet pipe 103 to exchange heat with the lubricating oil, and then is discharged from a water outlet nozzle 104, so that the purpose of cooling the lubricating oil in a speed reducer gearbox is achieved.

In the mode of additionally arranging the radiator outside the gear box shell of the speed reducer, although the radiator can be effectively radiated, the radiator is additionally arranged outside the gear box shell, and corresponding working procedures are needed to assemble the two parts during production, so that the production and processing working procedures of the gear box are certainly increased; meanwhile, the structure of adding the radiator outside the gear box shell has certain complexity and is not compact and concise enough.

Disclosure of Invention

The utility model discloses a gearbox cooling water channel structure, a speed reducer and an electric drive axle, wherein a gearbox shell of the speed reducer is integrally cast and molded, so that a production assembly link for assembling the gearbox shell and a lubricating oil heat dissipation device can be omitted, the gearbox cooling water channel structure has the characteristics of labor saving and time saving, and meanwhile, the gearbox shell box structure of the speed reducer is more compact and concise.

The technical scheme adopted by the utility model is as follows: a cooling water channel structure of a gear box comprises a gear box shell and a heat dissipation shell, wherein the gear box shell and the heat dissipation shell belong to an integrally formed whole. An oil duct which can be communicated with the inside of the gear box is arranged in the heat dissipation shell; a gap between the oil duct and the radiating shell is a radiating water channel inside the radiating shell; on the heat dissipation shell, the side of heat dissipation shell facing away from the gear box shell is opened, and simultaneously a sealing piece capable of sealing the heat dissipation shell is detachably arranged at the opening of the heat dissipation shell. When the cooling device is used, the cooling medium directly flows in the cooling shell, lubricating oil in the gear box flows in the oil duct, and the purpose of cooling the lubricating oil is achieved by exchanging heat between the lubricating oil and the cooling medium.

Further, the oil duct and the gear case housing are integrally formed, wherein on the oil duct, one surface of the oil duct, which faces away from the gear case housing, is opened, and the sealing member covers the opened part of the oil duct to seal the oil duct.

Further, an oil inlet and an oil outlet are respectively arranged in the oil duct at the contact position of the oil duct and the gear box shell, and the oil inlet and the oil outlet are mutually far away, namely, the distance between the oil inlet and the oil outlet on the oil duct should be as large as possible, so that the travel of lubricating oil in the oil duct is long when cooling is ensured, the lubricating oil and cooling liquid are subjected to full heat exchange, and the heat dissipation and cooling efficiency is improved; the oil inlet is connected with an oil inlet channel.

Further, the oil inlet channel is dispersed into a plurality of sub-channels in the body wall of the gear box shell, each sub-channel is connected with an oil inlet, and the other end of the oil inlet channel is connected with an oil pump. When the oil pump is used, lubricating oil in the gear box flows into the oil inlet through the oil inlet channel under the action of the oil pump, exchanges heat with cooling liquid in the heat dissipation water channel in the oil channel, and finally flows back into the gear box through the oil drain port.

Furthermore, the oil drain port penetrates through the wall of the gear box shell and is communicated with the inside of the gear box, and the design can reduce the path travel of the cooled lubricating oil, so that the lubricating oil cooling module is more compact and concise.

Further, the seal includes a sealing layer, a cover plate, and a screw.

Further, the sealing layer is a sealant or a sealing ring.

Further, a sealant or a sealing ring is arranged at the opening of the heat dissipation shell and the opening of the oil duct, and the heat dissipation shell and the oil duct are sealed by a cover plate, screws and screw holes. The sealing glue or the sealing ring is respectively arranged at the opening parts of the heat dissipation shell and the oil duct, so that the heat dissipation water channel and the oil duct in the heat dissipation shell can be mutually separated and isolated, and the complete and sealed heat dissipation water channel and the sealed oil duct are formed in the heat dissipation shell, thereby avoiding the mixing of cooling liquid and lubricating oil.

Further, a plurality of corresponding screw holes are formed in the opening position of the heat dissipation shell and the cover plate, and the cover plate is fixed to the opening position of the heat dissipation shell through screws and the screw holes. Specifically, the screw passes through the screw hole on the cover plate, enters the screw hole at the opening of the heat dissipation shell, and rotates to be twisted tightly, so that the cover plate and the sealing layer are fixed at the opening of the heat dissipation shell, and the functions of sealing and isolating the heat dissipation water channel and the oil duct are achieved.

Further, a water inlet channel and a water outlet which are far away from each other are arranged on the heat dissipation shell. The distance between the water inlet channel and the water outlet is enough large on the heat dissipation shell to ensure that the travel and the residence time of the cooling liquid in the heat dissipation water channel are longer when the cooling liquid flows through the heat dissipation shell, so that the cooling liquid and the lubricating oil in the oil duct perform sufficient heat exchange, and the heat dissipation and cooling efficiency is improved.

In order to achieve the above purpose, the utility model also discloses a speed reducer, wherein the shell of the speed reducer adopts the gearbox cooling water channel structure to radiate lubricating oil in the gearbox.

In order to achieve the above purpose, the utility model also discloses an electric drive axle, which comprises the speed reducer.

The beneficial effects are that: the utility model provides a gearbox cooling water channel structure, a speed reducer and an electric drive axle, which are formed by integrally processing a heat dissipation shell, an oil duct in the heat dissipation shell and a gearbox shell, wherein the oil duct is arranged in the heat dissipation shell to form an integrated lubricating oil heat dissipation device. The gearbox shell of the speed reducer has a more compact and simpler structure, and is convenient to produce and overhaul.

It should be noted that, the terms "first", "second", and the like are used herein merely to describe each component in the technical solution, and do not constitute a limitation on the technical solution, and are not to be construed as indicating or implying importance of the corresponding component; elements with "first", "second" and the like mean that in the corresponding technical solution, the element includes at least one.

Drawings

In order to more clearly illustrate the technical solution of the present utility model, the technical effects, technical features and objects of the present utility model will be further understood, and the present utility model will be described in detail below with reference to the accompanying drawings, which form a necessary part of the specification, and together with the embodiments of the present utility model serve to illustrate the technical solution of the present utility model, but not to limit the present utility model.

Like reference numerals in the drawings denote like parts, in particular:

FIG. 1 is a schematic view of a conventional lubrication oil cooling device for a decelerator and a gear case according to the background of the present utility model;

FIG. 2 is a schematic view of a cooling water channel of a gearbox according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the interior of a cooling water channel structure of a gearbox according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a cooling water channel of a gearbox according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram showing a second internal view of a cooling water channel structure of a gearbox according to an embodiment of the present utility model;

FIG. 6 is a schematic cross-sectional view of a cooling water channel structure of a gearbox along an oil inlet channel in an embodiment of the utility model;

FIG. 7 is a schematic cross-sectional view of a cooling water channel structure of a gearbox along an oil drain port according to an embodiment of the utility model;

FIG. 8 is a schematic view of a seal installation structure of a cooling water channel structure of a gearbox in an embodiment of the utility model.

Wherein: 101-a speed reducer, 102-a water-cooling radiator, 103-a water inlet pipe and 104-a water outlet nozzle; 105-heat dissipation shell, 106-water inlet channel, 107-heat dissipation water channel, 108-oil inlet channel, 109-oil duct, 110-water outlet, 120-oil drain port, 131-sealing ring, 132-cover plate, 133-screw, 100-gear case shell, 121-oil inlet, 134-screw hole.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings and examples. Of course, the following specific embodiments are only for explaining the technical solution of the present utility model, and are not limiting to the present utility model. Furthermore, the parts expressed in the embodiments or the drawings are merely illustrative of relevant parts in the embodiments of the present utility model, and not all of the present utility model. All other embodiments, which are obvious to those skilled in the art based on the embodiments of the present utility model, are intended to fall within the scope of the present utility model.

2-8, a cooling water channel structure of a gear box is formed by integrally casting a cube-shaped cooling shell 105 outside a gear box shell 100 of a speed reducer, and an oil duct 109 communicated with the inside of the gear box is arranged inside the cooling shell 105; wherein on the heat dissipation case 105, a side of the heat dissipation case 105 facing away from the gear case 100 is opened, and a sealing member for sealing the opening of the heat dissipation case 105 is detachably connected to the opening of the heat dissipation case 105 through a screw 133.

As shown in fig. 3 and 5, in the present embodiment, the oil passage 109 is integrally cast with the gear case housing 100. Wherein on the oil passage 109, a face of the oil passage 109 facing away from the gear case housing 100 is opened while the opening of the oil passage 109 and the opening of the heat dissipation case 105 are located on the same plane so as to seal the oil passage 109 and the heat dissipation case 105 by a seal.

As shown in fig. 5 to 7, in the present embodiment, an oil inlet 121 and an oil outlet 120 are provided apart from each other at the contact point of the oil passage 109 and the gearbox housing 100. The oil inlet 121 and the oil drain port 120 are far away from each other in the oil duct 109, so that the distance between the oil inlet 121 and the oil drain port 120 in the oil duct 109 is large enough to ensure that the stroke of lubricating oil in the oil duct 109 is long when cooling is performed, so that the lubricating oil and cooling liquid perform sufficient heat exchange, and the heat dissipation and cooling efficiency is improved. The oil inlet 121 is connected with an oil inlet passage 108.

In this embodiment, as shown in fig. 6, the oil inlet passage 108 is divided into 3 sub-passages in the body wall of the gearbox housing 100, each sub-passage being connected to one oil inlet 121. The other end of the oil inlet channel 108 is connected with an oil pump, when the gearbox is used, lubricating oil in the gearbox flows into the oil inlet 121 through the oil inlet channel 108 under the action of the oil pump, exchanges heat with cooling liquid in the cooling water channel 107 in the oil duct 109, and finally flows back into the gearbox through the oil drain 120.

As shown in fig. 4 and 7, in this embodiment, the oil drain 120 passes through the wall of the gear case housing 100 and is directly communicated with the interior of the gear case, so that the path travel of the cooled lubricating oil can be reduced, the lubricating oil can directly flow back into the gear case after being cooled, and the whole device can be more compact and concise.

As shown in fig. 8, in the present embodiment, the seal member includes a seal ring 131, a cover plate 132, and a screw 133. Screw holes 134 are formed in four corners of the cover plate 132; the seal ring 131 includes a seal ring along the periphery of the opening of the heat dissipation case 105 and a seal ring along the periphery of the opening of the oil passage. The open portions of the heat dissipation case 105 and the oil passage 109 are closed by a seal ring 131, a cover plate 132, and screws 133. Sealing rings are respectively arranged at the open positions of the radiating shell 105 and the oil duct 109, so that the radiating water channel 107 and the oil duct 109 in the radiating shell 105 can be separated and isolated from each other to form a complete and sealed radiating water channel 107 and the oil duct 109, and the mixing of cooling liquid and lubricating oil is avoided.

In the embodiment shown in fig. 3, 5 and 8, four screw holes 134 are formed in total at four corners of the opening, at which one side of the cube-shaped heat dissipation case 105 facing away from the gear case 100 is opened; four screw holes 134 are also provided at four corners of the cover plate 132; the cover plate 132 is fixed at the opening of the heat dissipation case 105 by a screw 133 and a screw hole 134 in use. Specifically, the screws 133 pass through screw holes in the cover plate 132, enter the screw holes in the open position of the heat dissipation shell 105, and are screwed tightly, so that the cover plate 132 and the sealing layer are fixed in the open position of the heat dissipation shell 105, and the functions of sealing and isolating the heat dissipation water channel 107 and the oil duct 109 are achieved.

In the present embodiment, as shown in fig. 3, a hole is formed in the upper left corner of the heat dissipation shell 105 as a water inlet channel 106, and when in use, a pipeline and a water pump are used to convey cooling liquid to the water inlet channel 106, and the cooling liquid enters the heat dissipation shell from the water inlet channel 106 to cool the lubricating oil. On the heat radiation housing 105, at a position relatively far from the water inlet passage 106, i.e., on the lower right side of the heat radiation housing 105 shown in fig. 3, a water discharge port 110 is provided for discharging the cooling liquid in the heat radiation housing 105. The water outlet 110 is arranged at a place far away from the water inlet channel 106, so that the travel and the residence time of the cooling liquid in the cooling water channel 107 are longer when the cooling liquid flows through the inside of the cooling shell 105, the cooling liquid and the lubricating oil in the oil duct 109 perform sufficient heat exchange, and the cooling efficiency of the lubricating oil is improved.

According to the gearbox radiating water channel structure disclosed by the utility model, the gearbox shell 100, the radiating shell 105 on the gearbox shell 100 and the oil duct 109 in the radiating shell 105 are integrally cast for production, so that the production procedure can be effectively reduced, and meanwhile, the structure of the gearbox of the motor reducer is simplified, and the gearbox radiating water channel structure has the characteristics of compactness and conciseness.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

It should be noted that the foregoing examples are merely for clearly illustrating the technical solution of the present utility model, and those skilled in the art will understand that the embodiments of the present utility model are not limited to the foregoing, and that obvious changes, substitutions or alterations can be made based on the foregoing without departing from the scope covered by the technical solution of the present utility model; other embodiments will fall within the scope of the utility model without departing from the inventive concept.

Claims (12)

1. A gearbox cooling water channel structure comprising a gearbox housing (100) and a heat dissipation shell (105) on the surface of the gearbox housing (100), characterized in that: the gearbox housing (100) and the heat dissipation housing (105) are integrally formed; an oil duct (109) communicated with the inside of the gearbox shell (100) is arranged in the heat dissipation shell (105), and a gap between the oil duct (109) and the heat dissipation shell (105) is a heat dissipation water channel (107); the side of the radiating shell (105) facing away from the gear box shell (100) is open, and a sealing element is detachably arranged at the open position of the radiating shell (105).

2. The gearbox cooling water channel structure of claim 1, wherein: the oil duct (109) is integrally formed with the gearbox housing (100); open at a side of the oil passage (109) facing away from the gearbox housing (100), and the seal covers the opening of the oil passage (109).

3. The gearbox cooling water channel structure of claim 2, wherein: an oil inlet (121) and an oil drain (120) are arranged in the oil duct (109) at the contact position of the oil duct (109) and the gearbox shell (100); the oil inlet (121) and the oil outlet (120) are far away from each other; the oil inlet (121) is connected with an oil inlet channel (108).

4. A gearbox cooling water way structure as claimed in claim 3, wherein: the oil inlet passage (108) is dispersed into a plurality of sub-passages in the body wall of the gearbox housing (100), and each sub-passage is respectively communicated with one oil inlet (121).

5. A gearbox cooling water way structure as claimed in claim 3, wherein: the oil drain port (120) communicates with the interior of the gearbox housing (100).

6. The gearbox cooling water channel structure of claim 2, wherein: the seal includes a sealing layer, a cover plate (132) and a screw (133).

7. The gearbox cooling water channel structure of claim 6, wherein: the sealing layer is a sealant or a sealing ring (131).

8. The gearbox cooling water way structure of claim 7, wherein: and a sealing glue or sealing ring (131) is arranged at the opening position of the heat dissipation shell (105) and/or the opening position of the oil duct (109).

9. The gearbox cooling water channel structure of claim 6, wherein: the opening part of the heat dissipation shell (105) and the cover plate (132) are provided with a plurality of corresponding screw holes (134); the cover plate (132) is fixed at the opening of the heat dissipation shell (105) through the screw (133) and the screw hole (134).

10. The gearbox cooling water channel structure of claim 1, wherein: the heat dissipation shell (105) is provided with a water inlet channel (106) and a water outlet (110) which are far away from each other.

11. A speed reducer, characterized in that: the housing of the reducer comprising the gearbox cooling water channel structure of any one of claims 1-10.

12. An electric drive axle, characterized by: the electric drive axle comprising the decelerator of claim 11.