Oil guide bushing

Abstract

The utility model relates to the technical field of electric drive, and provides an oil guide bushing which comprises a connecting rod and a connecting rod penetrating structure, the first end is used for being communicated with an oil hole in a speed reducer shell, the second end is used for being communicated with a motor shaft, and an inclined supporting part is arranged on the connecting rod and obliquely extends from the second end to the first end. The supporting part is used for being clamped with a clamping groove of the input shaft, an elastic piece is further arranged on the connecting rod, and the two ends of the elastic piece are connected with the connecting rod and the supporting part respectively. According to the technical scheme, the elastic piece can support the supporting part, the elastic piece can also deform, when the supporting part bears the abutting force in the clamping groove, the elastic piece can decompose part of the part, abutting against the clamping groove of the input shaft, of the supporting part, stress concentration of the root of the supporting part is avoided, and the problem that the supporting part is broken is solved.

Description

Technical Field

[0001] The present application relates to the field of electric drive technology, and in particular to an oil guide bushing. Background Art

[0002] The oil guide bushing is generally a part connected to the reducer housing and the motor shaft. The lubricating oil passes through the oil inlet hole on the reducer housing, through the oil guide bushing, and into the motor shaft. At the same time, the oil guide bushing is arranged in the input shaft, and the splines in the input shaft will be connected with the splines of the motor shaft, and the clip on the oil guide bushing will be clamped in the clamping groove of the input shaft. However, when the motor shaft rotates at high speed, since the motor shaft and the input shaft are fixedly connected, the oil guide bushing will be subjected to the force of separation from the input shaft, so that the end of the clip always abuts against the clamping groove, and the stress at the root is concentrated, which is easy to cause breakage. Utility Model Content

[0003] The technical problem to be solved by this application is to provide an oil guide bushing, in which the elastic part can support the support part, and the elastic part can also produce deformation. When the support part is subjected to the abutment force in the clamping groove, the elastic part can decompose a part of the support part that abuts in the clamping groove of the input shaft, thereby avoiding stress concentration at the root of the support part and reducing the problem of fracture of the support part.

[0004] In order to solve the above technical problems, this application adopts the following technical solutions:

[0005] The present application provides an oil-guide bushing, comprising: a connecting rod, a connecting rod through-structure, a first end of which is used to communicate with an oil hole on a reducer housing, and a second end of which is used to communicate with a motor shaft, an inclined support portion is provided on the connecting rod, the support portion extends obliquely from the second end to the first end, the support portion is used to engage with a coupling groove of an input shaft, an elastic member is further provided on the connecting rod, and both ends of the elastic member are respectively connected to the connecting rod and the support portion.

[0006] As an embodiment, the elastic member is a sheet-like structure and is bent toward the first end.

[0007] As an embodiment, the first end of the connecting rod is further provided with a first boss, which extends radially outward along the connecting rod. The outer peripheral side of the first boss is also provided with a protrusion, and the outer peripheral side of the protrusion is spaced apart with multiple protrusions for abutting the input shaft.

[0008] As an embodiment, the end surface of the first boss is provided with a plurality of through holes penetrating the first boss along the axial direction of the connecting rod.

[0009] As an embodiment, a plurality of the protrusions are provided, and two adjacent protrusions are spaced apart to form a gap.

[0010] As an embodiment, the second end of the connecting rod is provided with a plurality of oil dispersion ports, the oil dispersion ports extend from the second end toward the first end, and the axial edges of the oil dispersion ports are continuous curved structures.

[0011] As an embodiment, the oil dispersion port includes a first sub-gap and a second sub-gap that are connected, the edge of the second sub-gap is a connected curved structure, and the width of the first sub-gap along the circumferential direction is greater than the width of the second sub-gap along the circumferential direction.

[0012] As an embodiment, the connecting rod is further provided with a second boss, which extends radially along the connecting rod. The second boss is arranged close to the second end of the connecting rod, and the outer peripheral side surface of the second boss is provided with a groove for accommodating a sealing ring.

[0013] As an embodiment, the oil guide bushing further includes a sealing ring, which includes three circles of radially protruding sealing portions, the sealing portion located in the middle is arc-shaped, and the other two sealing portions are triangular structures, or; there are three grooves, and the oil guide bushing further includes multiple sealing rings, the sealing ring located in the middle is arc-shaped, and the other two sealing rings are triangular structures.

[0014] As an embodiment, a plurality of weight-reducing holes are provided on a side of the second boss facing the second end.

[0015] The technical solution of this application has the following beneficial effects:

[0016] The oil guide bushing includes a connecting rod, which is a through structure to facilitate the passage of lubricating oil. The connecting rod has a first end and a second end, wherein the first end is used to be connected to the oil hole on the reducer housing, and the second end is connected to the motor shaft, so that the chamber in the connecting rod is connected to the oil channel in the motor shaft. An inclined support portion is provided on the connecting rod. When the oil guide bushing is assembled in the input shaft, the support portion is inclined from the second end toward the first end and can be just snapped into the snap-in groove of the input shaft. An elastic member is also provided on the connecting rod. The two ends of the elastic member are respectively connected to the connecting rod and the support portion, which can provide supporting force to the support portion, and the elastic member can produce elastic deformation, decomposing a part of the centrifugal force of the support portion from the input shaft, and playing a buffering role on the support portion, avoiding stress concentration at the connection position of the support portion and the connecting rod, and reducing the problem of support portion breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic structural diagram of the reducer housing provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the assembly structure of the reducer housing, input shaft, motor shaft, and oil guide bushing provided in an embodiment of the present application;

[0020] Figure 3 for Figure 2 Schematic diagram of a local enlarged structure;

[0021] Figure 4 A schematic diagram of the structure of the input shaft provided in an embodiment of the present application;

[0022] Figure 5 A schematic cross-sectional view of the input shaft provided in an embodiment of the present application;

[0023] Figure 6 A schematic structural diagram of the oil guide bushing provided in an embodiment of the present application;

[0024] Figure 7 Schematic diagram of the structure of the oil guide bushing provided in the embodiment of the present application from different perspectives;

[0025] Figure 8 This is a schematic diagram of the cross-sectional structure of the oil guide bushing provided in an embodiment of the present application.

[0026] Icons: 1-connecting rod; 2-support part; 3-elastic member; 4-first boss; 41-protrusion; 42-protrusion; 43-through hole; 5-gap; 6-oil dispersion port; 61-first sub-gap; 62-second sub-gap; 7-second boss; 8-sealing ring; 9-weight reduction hole; 10-input shaft; 101-clamping groove; 11-housing; 111-groove; 12-motor shaft. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0028] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0029] like Figures 2 to 5 As shown, the oil guide bushing includes a connecting rod 1, which is a through structure to facilitate the passage of lubricating oil. The connecting rod 1 has a first end and a second end, wherein the first end is used to be connected to the oil hole on the reducer housing 11, and the second end is connected to the motor shaft 12, so that the chamber in the connecting rod 1 is connected to the oil channel in the motor shaft 12. The connecting rod 1 is provided with an inclined support portion 2. When the oil guide bushing is assembled in the input shaft 10, the support portion 2 is inclined from the second end toward the first end, and can be just snapped into the snap-in groove 101 of the input shaft 10. The connecting rod 1 is also provided with an elastic member 3, and the two ends of the elastic member 3 are respectively connected to the connecting rod 1 and the support portion 2, which can provide supporting force to the support portion 2, and the elastic member 3 can produce elastic deformation, decomposing a part of the centrifugal force exerted on the support portion 2 from the input shaft 10, and playing a buffering role on the support portion 2, avoiding stress concentration at the connection position of the support portion 2 and the connecting rod 1, and reducing the problem of breakage of the support portion 2.

[0030] Optionally, the root of the support portion 2 is the connection position between the support portion 2 and the connecting rod 1 .

[0031] Optionally, the connecting rod 1 and the supporting portion 2 are plastic parts, thereby reducing the weight of the electric drive system.

[0032] Optionally, the elastic part 3 can also be a plastic part, that is, the connecting rod 1, the elastic part 3 and the support part 2 are formed as one piece; of course, the elastic part 3 can also be a metal part, and its two ends can be connected to the connecting rod 1 and the support part 2 by hot melting.

[0033] In the prior art, when repairing the electric drive system, it is also involved in the repeated disassembly and installation of the oil guide bushing. During the disassembly and installation process, the root of the support part 2 is also more likely to break due to stress concentration. Therefore, through the support of the elastic part 3, the problem of the root of the support part 2 breaking can also be reduced.

[0034] like Figure 1 As shown, optionally, the reducer housing 11 may further be provided with a groove 111 for accommodating a bearing. The bearing sleeve is provided on the outside of the input shaft 10 , and an oil guide bushing is installed inside the input shaft 10 .

[0035] As an embodiment, the elastic member 3 is a sheet-like structure, which increases the contact area between the elastic member 3 and the support portion 2 and improves the stability of the structure; the elastic member 3 is bent toward the first end, so that when the support portion 2 is clamped in the clamping groove 101 of the input shaft 10, the elastic member 3 can bend toward the first end, and the force exerted on the support portion 2 to separate from the input shaft 10 is also toward the first end. The elastic member 3 can produce elastic deformation to alleviate the force exerted on the support portion 2, and can also provide support for the support portion 2.

[0036] Optionally, the elastic member 3 being bent toward the first end means that the bending direction of the elastic member 3 is toward the first end, and the protruding direction after bending is also toward the first end.

[0037] like Figure 6 As shown, as an embodiment, the first end of the connecting rod 1 is further provided with a first boss 4, which extends radially outward along the connecting rod 1, and the outer peripheral side surface of the first boss 4 is further provided with a protrusion 41, and the outer peripheral side surface of the protrusion 41 is provided with a plurality of protrusions 42 for abutting against the input shaft 10. In this way, when the oil guide bushing is installed in the input shaft 10, the protrusion 42 can form an interference fit with the input shaft 10, thereby improving the stability of the oil guide bushing and the input shaft 10; at the same time, the two adjacent protrusions 42 are arranged at intervals so that the gap between the two adjacent protrusions 42 can be used to flow lubricating oil, that is, the lubricating oil from the second end can flow through the gap between the two adjacent protrusions 42 to the bearing outside the input shaft 10.

[0038] Optionally, a circle of protrusions 41 may be provided on the outer peripheral side surface of the first boss 4. Of course, a plurality of protrusions 41 may also be provided at intervals.

[0039] Optionally, along the axial direction of the connecting rod 1 , the thickness of the protrusion 41 is smaller than the thickness of the first boss 4 , thereby reducing the overall weight of the oil guide bushing.

[0040] like Figure 6 and 7 As shown, as an embodiment, the end face of the first boss 4 is provided with a plurality of through holes 43 which pass through the first boss 4 along the axial direction of the connecting rod 1. By providing the through holes 43, some disassembly tools can pass through to hook the elastic member 3 and bend the elastic member 3, thereby facilitating the disassembly of the oil guide bushing.

[0041] Optionally, the elastic member 3 is bent toward the first end to facilitate the removal of the oil guide bushing.

[0042] Optionally, the removal tool may be some device with a hook, or a tool such as tweezers.

[0043] Optionally, two through holes 43 are provided, and the two through holes 43 correspond to the two elastic members 3 respectively.

[0044] Optionally, the protrusion 41 is flush with the end surface of the first boss 4 , and several blind holes can be provided on the protrusion 41 as weight-reducing holes 9 .

[0045] like Figure 6 As shown, as an embodiment, a plurality of protrusions 41 are provided, and two adjacent protrusions 41 are spaced apart to form a gap 5. By providing the gap 5, the lubricating oil between the first boss 4 and the second boss 7 can flow out through the gap 5 to the bearing outside the input shaft 10.

[0046] like Figure 3 As shown, as an embodiment, the second end of the connecting rod 1 is provided with a plurality of oil dispersion ports 6, which extend from the second end to the first end, and the axial edge of the oil dispersion port 6 is a continuous curved structure. By providing the oil dispersion port 6, when the motor shaft 12 rotates, the lubricating oil in the connecting rod 1 can be thrown out through the oil dispersion port 6, so that the splines in the input shaft 10 and the splines of the motor shaft 12 can be lubricated; at the same time, the axial edge of the oil dispersion port 6 is a continuous curved structure, which makes the thrown-out lubricating oil more dispersed, and makes the lubricating oil flowing out of the oil dispersion port 6 more uniform, and a part of the lubricating oil flows into the gap between the connecting rod 1 and the motor shaft 12, and then enters the splines in the input shaft 10 and the splines of the motor shaft 12 from the gap.

[0047] Optionally, each oil dispersion port 6 may have two axial edges, and each axial edge may be a wavy continuous curved structure or a serrated continuous curved structure.

[0048] like Figure 3 and 8 As shown, as an embodiment, the oil dispersion port 6 includes a first sub-notch 61 and a second sub-notch 62 that are connected to each other, the edge of the second sub-notch 62 is a connected curved structure, and the width of the first sub-notch 61 along the circumferential direction is greater than the width of the second sub-notch 62 along the circumferential direction, thereby increasing the area of ​​the oil dispersion port 6 and increasing the amount of lubricating oil thrown out.

[0049] Optionally, the first sub-notch 61 is located at an extended end of the second sub-notch 62 , that is, the second sub-notch 62 extends along the axial direction of the connecting rod 1 .

[0050] like Figure 6 As shown, as an embodiment, the connecting rod 1 is further provided with a second boss 7, which extends radially along the connecting rod 1. The second boss 7 is arranged near the second end of the connecting rod 1, and the outer peripheral side surface of the second boss 7 is provided with a groove for accommodating the sealing ring 8. By providing a groove on the outer peripheral side surface of the second boss 7 and installing the sealing ring 8 in the groove, the sealing between the motor shaft 12 and the oil guide bushing can be improved.

[0051] Optionally, the second boss 7 is close to the second end of the connecting rod 1 , so that the second boss 7 can be prevented from affecting the throwing out of the lubricating oil from the oil dispersion port 6 .

[0052] like Figure 3 As shown, as an embodiment, the oil guide bushing also includes a sealing ring 8, a groove is provided, and the sealing ring 8 includes three circles of sealing portions protruding radially, the sealing portion located in the middle is arc-shaped, and the other two sealing portions are triangular structures. Since the lip of the triangular sealing portion is triangular, the triangular sealing portion can preliminarily block the lubricating oil, and its triangular lip is thinner, which can also allow air pressure to pass through, so that the air pressure on both sides of the arc-shaped sealing portion in the middle is more balanced, avoiding poor sealing of the lubricating oil caused by air pressure; at the same time, the design of three circles of sealing portions can effectively alleviate the shaking of the oil guide bushing caused by centrifugal force during the rotation of the input shaft 10.

[0053] As a parallel implementation, three grooves can be provided, and the oil guide bushing also includes multiple sealing rings 8. The sealing ring 8 in the middle is arc-shaped, and the other two sealing rings 8 are triangular structures, which can also meet the air pressure balance on both sides of the middle sealing ring 8 and reduce the shaking of the oil guide bushing.

[0054] like Figure 6 As shown, as an embodiment, a plurality of weight-reducing holes 9 are provided on one side of the second boss 7 facing the second end, thereby achieving a weight-reducing effect.

[0055] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

[0056] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

[0057] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

Claims

1. An oil guide bushing, characterized in that: include: A connecting rod, a through-structure of the connecting rod, a first end of which is used to communicate with the oil hole on the reducer housing, and a second end of which is used to communicate with the motor shaft. The connecting rod is provided with an inclined support portion, and the support portion extends obliquely from the second end to the first end. The support portion is used to engage with the engaging groove of the input shaft. An elastic member is also provided on the connecting rod, and the two ends of the elastic member are respectively connected to the connecting rod and the support portion.

2. The oil guide bushing according to claim 1, characterized in that: The elastic member is a sheet-like structure and is bent toward the first end.

3. The oil guide bushing according to claim 1 or 2, characterized in that: The first end of the connecting rod is further provided with a first boss, which extends radially outwardly along the connecting rod. The outer peripheral side of the first boss is further provided with a protrusion, and the outer peripheral side of the protrusion is provided with multiple protrusions for abutting the input shaft at intervals.

4. The oil guide bushing according to claim 3, characterized in that: The end surface of the first boss is provided with a plurality of through holes penetrating the first boss along the axial direction of the connecting rod.

5. The oil guide bushing according to claim 3, characterized in that: There are multiple protrusions, and two adjacent protrusions are spaced apart to form a gap.

6. The oil guide bushing according to claim 1 or 2, characterized in that: The second end of the connecting rod is provided with a plurality of oil dispersion ports, the oil dispersion ports extending from the second end toward the first end, and the axial edges of the oil dispersion ports are continuous curved structures.

7. The oil guide bushing according to claim 6, characterized in that: The oil dispersion port includes a first sub-gap and a second sub-gap that are connected to each other. The edge of the second sub-gap is a connected curved structure. The width of the first sub-gap along the circumferential direction is greater than the width of the second sub-gap along the circumferential direction.

8. The oil guide bushing according to claim 1 or 2, characterized in that: The connecting rod is further provided with a second boss, which extends radially along the connecting rod. The second boss is arranged close to the second end of the connecting rod, and the outer peripheral side surface of the second boss is provided with a groove for accommodating a sealing ring.

9. The oil guide bushing according to claim 8, characterized in that: The oil guide bushing further includes a sealing ring, which includes three radially protruding sealing portions, the sealing portion located in the middle is arc-shaped, and the other two sealing portions are triangular structures, or; There are three grooves, and the oil guide bushing also includes multiple sealing rings. The sealing ring located in the middle is arc-shaped, and the other two sealing rings are triangular structures.

10. The oil guide bushing according to claim 8, characterized in that: A plurality of weight-reducing holes are provided on one side of the second boss facing the second end.

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