Special-shaped metal oil pipe for electric drive gearbox

Abstract

A special-shaped metal oil pipe for an electric drive gearbox comprises a metal oil pipe body, connecting assemblies are arranged at two end openings of the metal oil pipe body, each connecting assembly comprises a fixing flange and a connector which are both made of metal, and the fixing flanges are arranged outside the connecting ends of the connectors in a sleeving mode and are in interference fit with the connecting ends of the connectors. The end portion of the connecting end of the connector is arranged outside the end portion of the metal oil pipe in a sleeved mode and is in interference fit with the end portion of the metal oil pipe, the end of the metal oil pipe corresponds to the inner ring of the fixing flange in the radial direction of the connector, and the metal oil pipe and the connector are further welded through a welding ring. A sealing ring is embedded on the outer wall of the end part of the free end of the joint; the metal oil pipe, the fixing flange and the connector are sequentially overlapped and are in interference fit with one another, so that the fixing strength and the sealing performance of the metal oil pipe, the fixing flange and the connector are improved, and after the metal oil pipe and the connector are welded through the welding ring, the sealing performance between the metal oil pipe and the connector is further improved. And therefore, the sealing performance between the oil pipe and the shell and the durability of the structure at the connecting node are ensured.

Description

Technical Field

[0001] The utility model relates to components of an electric drive gearbox of a new energy vehicle, and in particular to a special-shaped metal oil pipe for the electric drive gearbox. Background Art

[0002] The pure electric drive transmission of new energy vehicles includes gears, bearings, shafts, and motors. The motor and gear shaft require oil for cooling and lubrication. The oil flows from the oil pan, suction filter, oil pump, housing oil passage, motor / gear shaft, oil cooler, housing oil passage, and finally the oil pan. Depending on the structural layout, some housings require oil pipes to connect to the housing oil passages, and these pipes must meet sealing and durability requirements. Utility Model Content

[0003] In response to the needs of the existing technology, the utility model provides a special-shaped metal oil pipe for an electric drive transmission, the purpose of which is to connect the oil channel on the shell and ensure the sealing between the oil pipe and the shell and the durability of the structure at the connection node.

[0004] A special-shaped metal oil pipe for an electric drive transmission includes a metal oil pipe. Both end ports of the metal oil pipe are provided with connecting components. The connecting components include a fixed flange and a joint, both of which are metal. The joint is a cylindrical structure. The fixed flange is sleeved outside the connecting end of the joint and has an interference fit therewith. The connecting end of the joint is sleeved outside the end of the metal oil pipe and has an interference fit therewith. The end of the metal oil pipe and the inner ring of the fixed flange correspond to each other in the radial direction of the joint. The metal oil pipe and the joint are also welded by a welding ring. A sealing ring is embedded on the outer wall of the free end of the joint.

[0005] Furthermore, the inner hole of the joint is connected to the metal oil pipe after the diameter is expanded.

[0006] Furthermore, an annular sink is provided on the inner hole side wall of the joint for matching the metal oil pipe, the annular table surface of the annular sink fits with the outer wall of the metal oil pipe, and the annular end face of the annular sink fits with the end face of the metal oil pipe.

[0007] Furthermore, the inner wall of the metal oil pipe overlaps with the inner wall of the free end of the joint.

[0008] Further, one end port of the inner ring of the fixed flange is welded to the outer wall of the joint through a welding ring.

[0009] Furthermore, a fixing lug plate is integrally provided on the outer ring of the fixing flange, and a fixing hole is opened on the fixing lug plate.

[0010] Furthermore, the metal oil pipe has a V-shaped structure, and the plane where the V-shaped structure is located is referred to as plane A. Both ends of the metal oil pipe are folded away from plane A to form folded portions, and the folded portions at both ends of the metal oil pipe are axially aligned.

[0011] Furthermore, the axial direction of the folding portion is arranged perpendicular to the A plane.

[0012] Furthermore, the metal oil pipe, the fixing flange and the joint are all made of stainless steel.

[0013] Furthermore, the inner and outer surfaces of the metal oil pipe, the fixing flange and the joint are all provided with electroplating layers.

[0014] The beneficial effects of the utility model are as follows: the metal oil pipe, the fixed flange and the joint have overlapping parts in sequence, and the three are interference fit with each other, thereby improving the fixing strength and sealing of the three. After the metal oil pipe and the joint are welded by the welding ring, the sealing between the metal oil pipe and the joint is further improved, thereby ensuring the sealing between the oil pipe and the shell and the durability of the structure at the connection node. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 for Figure 1 A magnified view of the structure of area A in the middle;

[0017] Figure 3 This is a schematic diagram of the installation structure of the utility model in the shell. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings. The embodiments of the present invention will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention. The terms such as left, center, right, top, and bottom in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product and should not be considered as restrictive.

[0019] A special-shaped metal oil pipe for an electric drive transmission, such as Figure 1 As shown, it includes a metal oil pipe 1, which is a V-shaped structure. The plane where the V-shaped structure is located is plane A. The ends of the metal oil pipe 1 are folded away from the A plane to form a folded portion 11, and the folded portions 11 at both ends of the metal oil pipe 1 are axially the same. The axial direction of the folded portion 11 is perpendicular to the A plane, so that the two connecting ends of the metal oil pipe 1 are easily plugged into the housing in the same direction; both end ports of the metal oil pipe 1 are provided with a connecting assembly 2, combined with Figure 2As shown, the connection assembly 2 includes a fixed flange 22 and a joint 21, both of which are metal. The joint 21 is a cylindrical structure. The fixed flange 22 is sleeved outside the connecting end of the joint 21 and has an interference fit therewith. At the same time, in order to improve the connection strength between the fixed flange 22 and the joint 21, one end of the inner ring of the fixed flange 22 is welded to the outer wall of the joint 21 through a welding ring.

[0020] The connecting end sleeve of the joint 21 is set outside the end of the metal oil pipe 1 and is interference fit with it, so that the end of the metal oil pipe 1 and the inner ring of the fixing flange 22 correspond to each other in the radial direction of the joint 21, and the metal oil pipe 1 and the joint 21 are also welded by a welding ring. In order to facilitate the connection between the metal oil pipe 1 and the joint 21, the inner hole of the joint 21 is expanded and connected to the metal oil pipe 1, and the connecting end port of the joint 21 and the outer wall of the metal oil pipe 1 are welded by a welding ring; an annular sink 211 for matching the metal oil pipe 1 is provided on the side wall of the inner hole of the joint 21, and the annular surface of the annular sink 211 is in contact with the outer wall of the metal oil pipe 1, and the annular end surface of the annular sink 211 is in contact with the end surface of the metal oil pipe 1, so as to facilitate the relative positioning between the metal oil pipe 1 and the joint 21, and the inner wall of the metal oil pipe 1 coincides with the inner wall of the free end of the joint 21; a sealing ring 24 is embedded on the outer wall of the free end of the joint 21.

[0021] The metal oil pipe 1, the fixed flange 22, and the connector 21 are all made of stainless steel, and all have electroplated surfaces on their inner and outer surfaces. Furthermore, to facilitate securing the fixed flange 22 to the housing, a fixing lug 23 is integrally formed on the outer ring of the fixed flange 22, and a fixing hole 231 is defined in the fixing lug 23.

[0022] When assembled on the housing 3, combine Figure 3 As shown, the housing 3 is provided with an oil passage opening 32 with an opening facing the same direction, and a fixing seat 31 is integrally provided on the housing 3 near the oil passage opening 32; the folded portion 11 of the metal oil pipe 1 is directed toward the oil passage opening 32 and the connector 21 is inserted therein. At this time, the connector 21 and the inner wall of the oil passage opening 32 are sealed by a sealing ring 24, and the fixing flange 22 is fixedly connected to the corresponding fixing seat 31 by screws, thereby realizing that the metal oil pipe 1 forms an oil passage on the housing 3. Since the fixing flange 22 and the end of the metal oil pipe 1 have mutually corresponding parts in the radial direction of the connector 21, the fixing flange 22 has a fixing effect on the connector 21 directly and the metal oil pipe 1 indirectly, thereby making the oil passage more stable and ensuring the sealing between the connector 21 and the oil passage opening 32.

[0023] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A special-shaped metal oil pipe for an electric drive transmission, comprising a metal oil pipe, characterized in that: Both end ports of the metal oil pipe are provided with connecting components, which include a fixed flange and a joint, both of which are metal. The joint is a cylindrical structure. The fixed flange is sleeved outside the connecting end of the joint and has an interference fit therewith. The connecting end of the joint is sleeved outside the end of the metal oil pipe and has an interference fit therewith, and the end of the metal oil pipe and the inner ring of the fixed flange correspond to each other in the radial direction of the joint. The metal oil pipe and the joint are also welded by a welding ring; a sealing ring is embedded on the outer wall of the free end of the joint.

2. The special-shaped metal oil pipe for an electric drive transmission according to claim 1, characterized in that: The inner hole of the joint is expanded to connect with the metal oil pipe.

3. The special-shaped metal oil pipe for an electric drive transmission according to claim 2, characterized in that: An annular sink is provided on the inner hole side wall of the joint for matching the metal oil pipe. The annular table surface of the annular sink fits with the outer wall of the metal oil pipe, and the annular end face of the annular sink fits with the end face of the metal oil pipe.

4. The special-shaped metal oil pipe for an electric drive transmission according to claim 3, characterized in that: The inner wall of the metal oil pipe coincides with the inner wall of the free end of the joint.

5. The special-shaped metal oil pipe for an electric drive transmission according to claim 1, characterized in that: One end port of the inner ring of the fixed flange is welded to the outer wall of the joint through a welding ring.

6. The special-shaped metal oil pipe for an electric drive transmission according to claim 1, characterized in that: A fixing lug plate is integrally provided on the outer ring of the fixing flange, and a fixing hole is opened on the fixing lug plate.

7. The special-shaped metal oil pipe for an electric drive transmission according to claim 1, characterized in that: The metal oil pipe has a V-shaped structure, and the plane where the V-shaped structure is located is referred to as plane A. Both ends of the metal oil pipe are folded away from plane A to form folded parts, and the folded parts at both ends of the metal oil pipe are axially aligned.

8. The special-shaped metal oil pipe for an electric drive transmission according to claim 7, characterized in that: The axial direction of the folding portion is perpendicular to the A plane.

9. The special-shaped metal oil pipe for an electric drive transmission according to claim 1, characterized in that: The metal oil pipe, fixing flange and joint are all made of stainless steel.

10. The special-shaped metal oil pipe for an electric drive transmission according to claim 1, characterized in that: The inner and outer surfaces of the metal oil pipe, the fixing flange and the joint are all provided with an electroplating layer.

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