Self-centering buffer oil seal pressure head of new energy electric drive assembly

Abstract

The utility model relates to a new energy electric drive assembly self-centering buffer oil seal pressure head which comprises an upper base, a pressure head and a framework component, one end of the framework component is arranged in the pressure head, the pressure head is in sliding connection with the framework component, the upper base is connected with one end of the pressure head, and a first elastic piece is arranged between the upper base and the framework component. A conical guide pin is arranged on the lower portion of the framework component, a second elastic piece is arranged between the framework component and the conical guide pin, the upper base is provided with a fixing piece, the fixing piece penetrates through the framework component and the second elastic piece to be connected with the conical guide pin, a clamping jaw is arranged on the lower portion of the framework component, a cross-shaped groove is formed in the bottom of the pressing head, and the clamping jaw is in cross-shaped connection with the cross-shaped groove. According to the oil seal pressing head, a positioning hole in the gear shaft machining process can be used as a guide datum hole in the press-fitting process, and positioning in the press-fitting process is achieved; meanwhile, integration of oil seal outer ring positioning, inner ring positioning and press fitting functions is achieved; and in addition, the press-fitting process is carried out slowly, and the oil seal is prevented from being damaged due to impact.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy electric drive assembly assembly, in particular to a new energy electric drive assembly self-centering buffer oil seal pressure head. Background Art

[0002] As the main component of the drive assembly, the oil seal is mainly installed in the housing and the rotating shaft to seal the internal gear oil of the assembly and prevent dust from entering. Now the motor speed is generally above 10,000 rpm. If the oil seal is not installed properly (protruding, recessed, cut edge, tilted), it will cause oil leakage. Once this fault occurs, it will cause quality defects such as lack of oil and dry grinding of the assembly (gears, bearings).

[0003] The utility model designs a self-centering oil seal pressure head to ensure the inner edge centering and outer ring positioning during the oil seal press-fitting process, and the press-fitting stroke is self-guided during the press-fitting process, thereby ensuring the quality of the oil seal installation process. Utility Model Content

[0004] Based on the above description, the utility model provides a new energy electric drive assembly self-centering buffer oil seal pressure head to solve the inner blade centering, outer ring positioning and self-guiding pressing stroke during the oil seal pressing process.

[0005] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: A self-centering buffer oil seal pressure head of a new energy electric drive assembly, comprising: an upper base, a pressure head, and a skeleton component, one end of the skeleton component is arranged inside the pressure head, and the pressure head is slidably connected to the skeleton component, the upper base is connected to one end of the pressure head, a first elastic member is arranged between the upper base and the skeleton component, a conical guide pin is arranged at the lower part of the skeleton component, a second elastic member is arranged between the skeleton component and the conical guide pin, a fixing member is arranged on the upper base, the fixing member passes through the skeleton component, the second elastic member is connected to the conical guide pin, a claw is arranged at the lower part of the skeleton component, a cross groove is opened at the bottom of the pressure head, and the claw is cross-connected with the cross groove.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the outer side of one end of the fixing member is a smooth structure, and the outer side of the other end of the fixing member is provided with a thread, and the fixing member is fixedly connected to the tapered guide pin via the thread.

[0008] Furthermore, the pressure head is provided with a first through hole, and the skeleton member enters into the interior of the pressure head from one side through the first through hole, and the middle part of the skeleton member is slidably connected with the pressure head through hole-shaft matching.

[0009] Furthermore, the cross-section of the upper base is an inverted convex groove shape, the upper base is provided with a step hole along the axial direction, and the upper base is provided with a second through hole around the outer side of the axis; the upper base is pressed into the interior of the pressure head from the other side of the pressure head through the first through hole, and the second through hole is fixedly connected to the pressure head through bolts, and the fixing part is inserted into the interior of the pressure head through the step hole.

[0010] Furthermore, a convex head structure is provided on the upper part of the skeleton component, a fourth through hole is provided on the upper part of the skeleton component, a first cavity structure is formed between the upper part of the skeleton component and the pressure head, the first elastic member is provided in the first cavity structure, and the fixing member passes through the axis of the first elastic member and through the fourth through hole.

[0011] Furthermore, a threaded hole is provided on the upper portion of the tapered guide pin, and the lower portion of the tapered guide pin is a cone structure. The threaded hole is matched with the thread on the outside of the fixing member, the lower conical surface of the tapered guide pin is matched with the center hole of the gear shaft, and the center hole of the gear shaft is matched with the inner diameter of the skeleton component.

[0012] Furthermore, a second cavity structure is formed between the interior of the skeleton component and the upper portion of the tapered guide pin, the second elastic member is disposed in the second cavity structure, and the fixing member passes through the axis of the second elastic member and is fixedly connected to the tapered guide pin.

[0013] Furthermore, a stepped structure is provided at the bottom of the pressure head, the step of the stepped structure is not less than 0.5 mm, and the bottom of the step of the stepped structure is an arc-shaped structure.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0015] 1. The oil seal head can locate the center hole of the gear shaft during machining by setting a tapered guide pin;

[0016] 2. The oil seal pressure head is provided with a spring between the tapered guide pin and the frame member, and the spring reaction force is used to ensure that there is no interference in the pressure head being unable to press down during the press-fitting process, and the gradual guide positioning in the press-fitting stroke is realized;

[0017] 3. The oil seal pressure head realizes the integration of oil seal outer ring positioning, inner ring positioning and press-fitting functions through the coordinated use of the skeleton component and the pressure head;

[0018] 4. The oil seal pressure head provides a rectangular spring between the pressure head and the skeleton member to provide buffering during the press-fitting process, thereby slowing down the press-fitting process and preventing damage to the oil seal due to impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A schematic diagram of the three-dimensional structure of a self-centering buffer oil seal pressure head of a new energy electric drive assembly provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the structure from a first perspective of a self-centering buffer oil seal pressure head of a new energy electric drive assembly provided by an embodiment of the utility model;

[0021] Figure 3 for Figure 2 Schematic diagram of the cross section along AA;

[0022] Figure 4 A schematic diagram of a top view structure of a self-centering buffer oil seal pressure head of a new energy electric drive assembly provided by an embodiment of the utility model;

[0023] Figure 5 A bottom-up structural schematic diagram of a self-centering buffer oil seal pressure head of a new energy electric drive assembly provided by an embodiment of the utility model;

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1. Upper base; 11. Fixing piece; 12. Step hole; 13. Second through hole; 2. Press head; 21. First elastic piece; 22. Cross groove; 23. First cavity structure; 3. Skeleton member; 31. Second elastic piece; 32. Claw; 33. Fourth through hole; 34. Second cavity structure; 4. Conical guide pin; 5. Gear shaft. DETAILED DESCRIPTION

[0026] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0028] When used herein, the singular forms "a", "an" and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0029] See also Figure 1-5 The utility model provides a technical solution: a self-centering buffer oil seal pressure head of a new energy electric drive assembly, comprising: an upper base 1, a pressure head 2, and a skeleton component 3;

[0030] One end of the skeleton member 3 is arranged inside the pressure head 2, and the pressure head 2 is slidably connected to the skeleton member 3, the upper base 1 is connected to one end of the pressure head 2, a first elastic member 21 is arranged between the upper base 1 and the skeleton member 3, a conical guide pin 4 is arranged at the lower part of the skeleton member 3, a second elastic member 31 is arranged between the skeleton member 3 and the conical guide pin 4, the upper base 1 is provided with a fixing member 11, the fixing member 11 passes through the skeleton member 3 and the second elastic member 31 and is connected to the conical guide pin 4, a claw 32 is arranged at the lower part of the skeleton member 3, a cross groove 22 is opened at the bottom of the pressure head 2, and the claw 32 is cross-connected with the cross groove 22.

[0031] It should be noted that the first elastic member 21 and the second elastic member 31 here can both be springs, rubber rings, etc., and the fixing members 11 can both be long bolts and screw rods; the cross groove 22 here refers to a cross-shaped groove opened along the axis of the pressure head, and the claws 32 are also four. The cross connection between the claws 32 and the cross groove 22 means that the claws 32 pass through the cross grooves one by one. The cross groove 22 is opened at the bottom of the pressure head 2, so that the claws 32 of the skeleton member 3 can be positioned downward. The upper part, lower part, outer side, etc. mentioned here are described in terms of the placement position of the oil seal pressure head relative to the ground during operation.

[0032] Specifically, the outer side of one end of the fixing member 11 is a smooth structure, and the outer side of the other end of the fixing member 11 is provided with a thread, and the fixing member 11 is fixedly connected to the tapered guide pin 4 through the thread.

[0033] Specifically, the pressing head 2 is provided with a first through hole 23, and the skeleton member 3 enters into the pressing head 2 from one side through the first through hole 23, and the middle part of the skeleton member 3 is slidably connected with the pressing head 2 through hole-shaft matching.

[0034] Please see attached Figure 3 That is to say, the position of the lower claw 32 of the skeleton member 3 cooperates with the outer diameter of the oil seal, so that the outer diameter of the oil seal is guided during the press-fitting process to prevent tilting during the press-fitting stroke; the middle part of the skeleton member 3 cooperates with the press head 2 for hole-shaft cooperation, and the press-fitting process is precisely guided and positioned, and sliding movement is possible; the skeleton member 3 and the press head 2 are slidably matched to realize the integration of the oil seal outer ring positioning, inner ring positioning, and press-fitting functions.

[0035] The cross-section of the upper base 1 is an inverted convex groove shape, and the upper base 1 is provided with a step hole 12 along the axial direction, and the upper base 1 is provided with a second through hole 13 around the outer side of the axis; the upper base 1 is pressed into the interior of the pressing head 2 from the other side of the pressing head 2 through the first through hole 23, and the second through hole 13 is fixedly connected to the pressing head 2 by bolts, and the fixing part 11 is inserted into the interior of the pressing head 2 through the step hole 12.

[0036] Please see attached Figure 3 It should be noted that the step hole 12 here is composed of holes with different diameters, which is convenient for loading and unloading the fixing member 11. The second through hole 13 can be set in multiple, preferably 4, and is set inside the second through hole 13. In other words, the upper base 1 is a double-layer cylindrical structure with different diameters. The raised cylinder at the lower part of the upper base 1 realizes positioning with the inner ring of the first elastic member 21. The multiple second through holes 13 can be assembled with the pressure head 2 by bolts through the bolt step holes. The upper end surface of the upper base 1 bears the press-fitting pressure and transmits it to the lower layer components. The middle countersunk hole of the upper base 1 is used to install the fixing member 11, which can be a long bolt to realize the connection between the upper base 1 and the tapered guide pin 4, thereby realizing the integrated assembly and guidance of all components.

[0037] Specifically, a convex head structure is provided on the upper part of the skeleton component 3, a fourth through hole 33 is provided on the upper part of the skeleton component 3, a first cavity structure 23 is formed between the upper part of the skeleton component 3 and the pressure head 2, the first elastic member 21 is provided in the first cavity structure 23, and the fixing member 11 passes through the axis of the first elastic member 21 and through the fourth through hole 33.

[0038] That is to say, the top of the skeleton member 3 is bolted to the upper base 1, and a first cavity structure 23, that is, a travel spring cavity structure, is provided inside. A rectangular spring can be used between the pressure head 2 and the skeleton to buffer the pressure during the press-fitting process, thereby achieving a slow press-fitting process and preventing damage to the oil seal due to impact.

[0039] Specifically, a threaded hole is provided on the upper portion of the tapered guide pin 4, and the lower portion of the tapered guide pin 4 is a cone structure. The threaded hole is adapted to the thread on the outside of the fixing member 11, and the lower conical surface of the tapered guide pin 4 is adapted to the center hole of the gear shaft 5, and the center hole of the gear shaft 5 is adapted to the inner diameter of the skeleton member 3.

[0040] That is, the lower conical surface of the tapered guide pin 4 matches with the center hole of the shaft machining, and the inner and outer conical surfaces are automatically guided and aligned when placed on the lathe. The diameter of the center hole of the shaft machining matches with the inner circular hole of the skeleton member 3 to achieve guided sliding, and the second elastic member is installed in the upper hole groove to achieve the lifting or retraction of the tapered guide pin 4. The tapered guide pin 4 adopts elastic reaction force to ensure that it will not interfere with the pressing head 2 in the pressing process, and realizes the step-by-step guiding positioning in the pressing stroke.

[0041] A second cavity structure 34 is formed between the interior of the skeleton component 3 and the upper portion of the tapered guide pin 4 , the second elastic member 31 is disposed in the second cavity structure 34 , and the fixing member 11 passes through the axis of the second elastic member 31 and is fixedly connected to the tapered guide pin 4 .

[0042] A stepped structure is arranged at the bottom of the pressure head 2, the step of the stepped structure is not less than 0.5 mm, and the bottom of the step of the stepped structure is an arc-shaped structure.

[0043] It should be noted that the inner circle of the step structure is slightly smaller than the outer diameter of the center hole of the gear shaft 5, that is, slightly smaller than the outer diameter of the oil seal hole. The outer circle of the step structure cooperates with the shell during the press-fitting process to limit the position to prevent the oil seal from sinking inward. The 0.5mm step can make the oil seal lower than the installation end face during the press-fitting process to prevent the oil seal (rubber material) from rebounding. The tapered guide pin 4 is used to accurately position the center hole of the gear shaft 5 during the processing process.

[0044] A specific implementation method of the utility model patent: during the press-fitting process, the oil seal is pre-placed on the gear shaft and housing installation position, and the pressure head 2 is placed. The claw 32 of the pressure head 2 matches the outer circle of the oil seal. At this time, the inner diameter of the claw 32 matches the outer diameter of the spline of the gear shaft 5, and the conical surface of the tapered guide pin 4 matches the conical surface of the center hole of the gear shaft 5. Under the influence of the tooling gravity, the second elastic member 31 is displaced in a small section. At this time, the press head 2 moves downward, and the upper base 1 is under pressure. The pressure is transmitted to the pressure head 2 after being buffered by the first elastic member 21. The pressure head 2 and the oil seal are connected. The seal is fitted. When the inner ring of the skeleton member 3 is positioned (relying on the tapered guide pin 4 and the center hole of the gear shaft 5, the inner diameter of the skeleton member 3 and the spline of the gear shaft 5) and the outer positioning (claw 32 and the outer circle of the oil seal), the first elastic member 21 and the second elastic member 31 are compressed. When the end face of the oil seal is flush with the installation end face, the pressure head 2 still moves downward, that is, the step moves downward, and the outer circle of the lower end of the pressure head 2 is flush with the installation end face, and the inner circle of the pressure head 2 is flush with the oil seal and is 0.5mm lower than the installation end face, the pressure head 2 is removed, and the oil seal rebounds. The end face of the oil seal is not tilted, and the end face is 0-0.4mm lower than the installation end face, meeting the product shaking requirements.

[0045] In summary, the oil seal pressure head can position the center hole of the gear shaft 5 during the processing process by setting a tapered guide pin 4; by setting a spring between the tapered guide pin 4 and the skeleton component 3 and utilizing the spring reaction force, it is ensured that the pressure head 2 will not be interfered with and cannot be pressed down during the press-fitting process, and gradual guiding positioning in the press-fitting stroke is achieved; through the coordinated use of the skeleton component 3 and the pressure head 2, the outer ring positioning, inner ring positioning and press-fitting functions of the oil seal are integrated; by setting a rectangular spring between the pressure head 2 and the skeleton component 3, buffering is performed during the press-fitting process, the press-fitting process is slowed down, and damage to the oil seal caused by impact is prevented.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-centering buffer oil seal pressure head for a new energy electric drive assembly, characterized in that: include: An upper base, a pressure head, and a frame member, one end of the frame member is arranged inside the pressure head, and the pressure head is slidably connected to the frame member, the upper base is connected to one end of the pressure head, a first elastic member is arranged between the upper base and the frame member, a conical guide pin is arranged at the lower part of the frame member, a second elastic member is arranged between the frame member and the conical guide pin, the upper base is provided with a fixing member, the fixing member passes through the frame member, the second elastic member and is connected to the conical guide pin, a claw is arranged at the lower part of the frame member, a cross slot is opened at the bottom of the pressure head, and the claw is cross-connected with the cross slot.

2. The self-centering buffer oil seal pressure head of the new energy electric drive assembly according to claim 1 is characterized in that: The outer side of one end of the fixing piece is a smooth structure, and the outer side of the other end of the fixing piece is provided with a thread, and the fixing piece is fixedly connected to the tapered guide pin through the thread.

3. The self-centering buffer oil seal pressure head of the new energy electric drive assembly according to claim 1 is characterized in that: The pressure head is provided with a first through hole, and the frame member enters the interior of the pressure head from one side through the first through hole. The middle part of the frame member is slidably connected with the pressure head through hole-shaft matching.

4. The self-centering buffer oil seal pressure head of the new energy electric drive assembly according to claim 3 is characterized in that: The cross-section of the upper base is an inverted convex groove shape, the upper base is provided with a step hole along the axial direction, and the upper base is provided with a second through hole around the outer side of the axis; the upper base is pressed into the interior of the pressure head from the first through hole on the other side of the pressure head, and the second through hole is fixedly connected to the pressure head by bolts, and the fixing part is inserted into the interior of the pressure head through the step hole.

5. The self-centering buffer oil seal pressure head of the new energy electric drive assembly according to claim 1 is characterized in that: A convex head structure is provided on the upper part of the skeleton component, a fourth through hole is provided on the upper part of the skeleton component, a first cavity structure is formed in the upper part of the skeleton component and the pressure head, the first elastic member is provided in the first cavity structure, and the fixing member passes through the axis of the first elastic member and through the fourth through hole.

6. The self-centering buffer oil seal pressure head of the new energy electric drive assembly according to claim 1 is characterized in that: A threaded hole is provided on the upper part of the tapered guide pin, and the lower part of the tapered guide pin is a cone structure. The threaded hole is matched with the thread on the outside of the fixing part, and the lower conical surface of the tapered guide pin is matched with the center hole of the gear shaft, and the center hole of the gear shaft is matched with the inner diameter of the skeleton component.

7. The self-centering buffer oil seal pressure head of the new energy electric drive assembly according to claim 1 is characterized in that: A second cavity structure is formed between the interior of the skeleton component and the upper portion of the tapered guide pin, the second elastic member is disposed in the second cavity structure, and the fixing member passes through the axis of the second elastic member and is fixedly connected to the tapered guide pin.

8. The self-centering buffer oil seal pressure head of the new energy electric drive assembly according to claim 1 is characterized in that: A stepped structure is arranged at the bottom of the pressure head, the steps of the stepped structure are not less than 0.5 mm, and the bottom of the steps of the stepped structure is an arc-shaped structure.

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