Gearbox oil gallery connection structure and gearbox

Abstract

The utility model relates to a kind of gear box oil channel connecting structure and gear box, it includes first body, second body and annular elastic sealing piece;First body has spaced first sealing surface and second sealing surface, first oil hole is set on second sealing surface;Second body has spaced third sealing surface and fourth sealing surface, second oil hole is set on fourth sealing surface;First body is connected with second body, first sealing surface and third sealing surface sealing contact;Annular elastic sealing piece is clamped between second sealing surface and fourth sealing surface.It can reduce the probability of lubricating oil leakage in oil hole, while also avoiding the over-positioning between parts, meet the gear box use function, reduce the failure risk caused by oil seepage.

Description

Technical Field

[0001] This utility model relates to the field of gearboxes, and more specifically, to a gearbox oil passage connection structure and a gearbox. Background Technology Typically, due to manufacturing errors, industrial production cannot guarantee that two or more surfaces of a connected part will simultaneously have tight contact or identical tolerances. If it is technically necessary to design the connection so that two or more surfaces of a connected part have tight contact or identical tolerances, this is usually classified as over-locating. Therefore, in a gearbox, only one surface will have tight contact between two connected parts.

[0002] The inventors discovered during their research that the existing gearbox oil passage connection structure has at least the following drawbacks: Due to lubrication and sealing requirements, two or more surfaces need to be in close contact in practice. If there is a gap on one of the surfaces, it will increase the risk of lubricating oil spillage. Utility Model Content

[0003] The purpose of this utility model includes, for example, providing a gearbox oil passage connection structure and a gearbox, which can reduce the probability of lubricating oil leakage in the oil holes when the oil holes of two parts are connected, and at the same time avoid over-positioning between parts, meet the function of the gearbox, and reduce the risk of failure caused by oil leakage.

[0004] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a gearbox oil passage connection structure, comprising: The first body, the second body, and the annular elastic seal; The first body has a first sealing surface and a second sealing surface arranged at intervals, and a first oil hole is provided on the second sealing surface; the second body has a third sealing surface and a fourth sealing surface arranged at intervals, and a second oil hole is provided on the fourth sealing surface; the first body is connected to the second body, and the first sealing surface is in sealing contact with the third sealing surface; the annular elastic seal is sandwiched between the second sealing surface and the fourth sealing surface.

[0005] In an optional embodiment, when the first sealing surface and the third sealing surface are rigidly abutting, the annular elastic seal sandwiched between the second sealing surface and the fourth sealing surface prevents the second sealing surface from rigidly abutting the fourth sealing surface.

[0006] In an optional embodiment, an annular positioning groove is provided on the second sealing surface, the annular positioning groove being arranged around the outer periphery of the first oil hole; the annular elastic seal is embedded in the annular positioning groove on one side in its thickness direction, and the annular elastic seal is in contact with the fourth sealing surface on the other side in its thickness direction.

[0007] In an optional embodiment, the annular positioning groove has recesses and protrusions arranged alternately in its circumferential direction on its groove wall, and the annular elastic seal is used to deform radially under the action of external force and can engage with the recesses and protrusions.

[0008] In an optional embodiment, a positioning recess is provided on the second sealing surface, and the first oil hole is opened on the bottom wall of the positioning recess; the annular elastic seal is embedded in the positioning recess on one side in its thickness direction, and the annular elastic seal is in contact with the fourth sealing surface on the other side in its thickness direction.

[0009] In an optional embodiment, the gearbox oil passage connection structure further includes a locking member, which is connected to both the first body and the second body, and is used to apply a locking force to the first body and the second body, so that the first sealing surface and the third sealing surface move closer to each other under the action of the locking force, and the second sealing surface and the fourth sealing surface move closer to each other under the action of the locking force.

[0010] In an optional embodiment, a sealant layer is provided on the first sealing surface and / or the third sealing surface.

[0011] In an optional embodiment, the annular elastic seal is configured as an O-ring rubber seal.

[0012] In an optional embodiment, the annular elastic seal is configured as a rubber flat washer.

[0013] Secondly, this utility model provides a gearbox, the gearbox comprising: The gearbox oil passage connection structure described in any of the foregoing embodiments.

[0014] The beneficial effects of this utility model embodiment include, for example: In summary, the gearbox oil passage connection structure provided in this embodiment includes an annular elastic seal sandwiched between the second sealing surface of the first main body and the fourth sealing surface of the second main body. This annular elastic seal separates the second and fourth sealing surfaces and seals the mating position of the first and second oil holes. In this way, when the first and third sealing surfaces are in rigid contact, the second and fourth sealing surfaces are prevented from being in a rigid abutting state. Simultaneously, it prevents lubricating oil flowing in the first and second oil holes from overflowing at the second and fourth sealing surfaces. In other words, the gearbox oil passage connection structure design provided in this embodiment, when two or more surfaces of two parts are tightly fitted, can prevent over-positioning between the two parts and also prevent lubricating oil overflow, achieving the required functions of the gearbox while reducing the probability of failure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A cross-sectional view of an oil passage connection structure for preventing over-positioning of a gearbox provided in one embodiment of the present invention; Figure 2 for Figure 1 A partial structural diagram of the first sealing surface in the gearbox's oil passage connection structure to prevent over-positioning. Figure 3 for Figure 1 A partial structural diagram of the second sealing surface in the gearbox's oil passage connection structure to prevent over-positioning. Figure 4 for Figure 1 A partial structural diagram of the third sealing surface in the oil passage connection structure for preventing over-positioning of the gearbox shown. Figure 5 for Figure 1 The diagram shows a partial structural schematic of the fourth sealing surface in the oil passage connection structure for preventing over-positioning of the gearbox. Figure 6 A cross-sectional view of an oil passage connection structure for preventing over-positioning of a gearbox provided in another embodiment of the present invention; Figure 7 for Figure 6 The diagram shows a partial structural schematic of the second sealing surface in the oil passage connection structure for preventing over-positioning of the gearbox.

[0017] icon: 100 - Gearbox oil passage connection structure; 110 - First body; 111 - First sealing surface; 112 - Second sealing surface; 1121 - Annular positioning groove; 1122 - Positioning recess; 113 - First oil hole; 120 - Second body; 121 - Third sealing surface; 122 - Fourth sealing surface; 123 - Second oil hole; 130 - Annular elastic seal; 140 - Locking element. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0024] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figure 1The figure shown is a cross-sectional view of a gearbox oil passage connection structure 100 provided in one embodiment of this invention. Figure 2 The diagram shown is a partial structural schematic of the first sealing surface 111 in this embodiment. Figure 3 The diagram shown is a partial structural schematic of the second sealing surface 112 in this embodiment. Figure 4 The diagram shown is a partial structural schematic of the third sealing surface 121 in this embodiment. Figure 5 The diagram shown is a partial structural schematic of the fourth sealing surface 122 in this embodiment.

[0025] The gearbox oil passage connection structure 100 provided in this embodiment includes a first body 110, a second body 120, and an annular elastic seal 130. A static sealing surface is formed between the first body 110 and the second body 120. Both the first body 110 and the second body 120 are provided with two static sealing surfaces. One of the static sealing surfaces has opposing oil holes on both sides. The annular elastic seal 130 is disposed on one of the static sealing surfaces with opposing oil holes on both sides to prevent the static sealing surface from rigidly resisting. The other static sealing surface is only coated with sealant. This static sealing surface rigidly resists and serves as a positioning surface.

[0026] Specifically, the first body 110 has a first sealing surface 111 and a second sealing surface 112 arranged in parallel and spaced apart, and a first oil hole 113 is provided on the second sealing surface 112. The second body 120 has a third sealing surface 121 and a fourth sealing surface 122 arranged in parallel and spaced apart, and a second oil hole 123 is provided on the fourth sealing surface 122. An annular elastic seal 130 is sandwiched between the second sealing surface 112 and the fourth sealing surface 122, and prevents the second sealing surface 112 and the fourth sealing surface 122 from rigidly abutting each other, so that the first body 110 and the second body 120 can rigidly abut against the first sealing surface 111 and the third sealing surface 121, thus realizing the functional requirement of only one positioning surface necessary for the two parts of the gearbox to cooperate.

[0027] Optionally, the first oil hole 113 and the second oil hole 123 are aligned inside the annular elastic seal 130, thereby connecting the internal oil passages of the first body 110 and the second body 120, ensuring that lubricating oil can flow between the first body 110 and the second body 120. Because the annular elastic seal 130 deforms under the locking force, it fills the gap between the second sealing surface 112 and the fourth sealing surface 122, preventing oil from the first oil hole 113 and the second oil hole 123 from overflowing from the second sealing surface 112 and the fourth sealing surface 122, thus avoiding gearbox malfunction.

[0028] In one embodiment, optionally, a positioning recess 1122 is provided on the second sealing surface 112, and a first oil hole 113 is formed on the bottom wall of the positioning recess 1122; a second oil hole 123 is provided on the fourth sealing surface 122; an annular elastic seal 130 is embedded in the positioning recess 1122 on one side in the thickness direction, and the annular elastic seal 130 abuts against the fourth sealing surface 122 on the other side in the thickness direction.

[0029] It is understood that the first oil hole 113 is formed on the bottom wall of the positioning recess 1122, which is equivalent to the first oil hole 113 communicating with the positioning recess 1122. The second oil hole 123 is formed on the fourth sealing surface 122, which is equivalent to the second oil hole 123 communicating with the fourth sealing surface 122. In this embodiment, the annular elastic seal 130 can be a rubber flat washer with a through hole in its middle position. The rubber flat washer is embedded in the positioning recess 1122 on one side in its thickness direction, and abuts against the fourth sealing surface 122 on the other side in its thickness direction. The first oil hole 113 and the second oil hole 123 are aligned and communicated through the through hole in the middle of the rubber flat washer.

[0030] It should be noted that by designing an appropriate thickness for the annular elastic seal 130, it is clamped by the first body 110 and the second body 120. One side wall of the annular elastic seal 130, embedded in the positioning recess 1122, fits against the bottom wall of the positioning recess 1122, while the other side of the annular elastic seal 130 abuts against the fourth sealing surface 122. This ensures that there is no gap between the second sealing surface 112 and the fourth sealing surface 122, thereby guaranteeing the sealing effect of the second sealing surface 112 and the fourth sealing surface 122 while ensuring the unobstructed flow of the oil hole. Simultaneously, it prevents the second sealing surface 112 and the fourth sealing surface 122 from directly and rigidly abutting against each other, thus fulfilling the functional requirement that only one positioning surface is required for the mating of the two gearbox parts at the first sealing surface 111 and the third sealing surface 121.

[0031] In the actual assembly process, sealant can first be applied to the sealing areas of the first sealing surface 111 and the third sealing surface 121 to form a sealant layer. Next, a positioning recess 1122 is provided on the second sealing surface 112 corresponding to the area of ​​the first oil hole 113. Then, the annular elastic seal 130 is embedded into the positioning recess 1122. With the first oil hole 113 aligned with the second oil hole 123, the first sealing surface 111 and the third sealing surface 121 are held together, and the second sealing surface 112 and the fourth sealing surface 122 are brought close together. During this process, the annular sealant 130 abuts against the fourth sealing surface 122.

[0032] Then, the first body 110 and the second body 120 are locked together. During the locking process, the annular elastic seal 130 undergoes elastic deformation, filling the gap between the second sealing surface 112 and the fourth sealing surface 122. This ensures the sealing effect of the second sealing surface 112 and the fourth sealing surface 122 while guaranteeing the unobstructed flow of the oil holes. It also prevents the second sealing surface 112 and the fourth sealing surface 122 from rigidly resisting each other, fulfilling the functional requirement that only one positioning surface is required for the two parts of the gearbox to mate. Furthermore, it prevents oil from the first oil hole 113 and the second oil hole 123 from overflowing from the second sealing surface 112 and the fourth sealing surface 122, ensuring the normal lubrication function of the gearbox.

[0033] Optionally, for locking the first body 110 and the second body 120, the gearbox oil passage connection structure 100 further includes a locking member 140, which cooperates with the first body 110 and the second body 120 to apply a locking force to the first body 110 and the second body 120, causing the first sealing surface 111 and the third sealing surface 121 and the second sealing surface 112 and the fourth sealing surface 122 to move closer to each other.

[0034] The locking element 140 applies a locking force to the first body 110 and the second body 120 to ensure the sealing effect of the first sealing surface 111 and the third sealing surface 121. For example, in practical applications, the locking element 140 can be a bolt, which passes through the mounting holes on the first body 110 and the second body 120 and is then locked by a nut. The axial direction of the bolt is perpendicular to the first sealing surface 111 and the third sealing surface 121.

[0035] It should be understood that the number and position of the locking elements 140 can be designed as needed. By using multiple locking elements 140 to fix the first body 110 and the second body 120, it is possible to ensure that the first body 110 and the second body 120 are tightly fitted, which not only has a better positioning effect, but also allows the annular elastic sealing ring to be subjected to sufficient compression deformation, thereby improving the sealing effect.

[0036] Furthermore, the shapes of the first body 110 and the second body 120 are not limited and can be designed as needed.

[0037] Please refer to the following: Figure 6 and Figure 7 , Figure 6 The figure shown is a cross-sectional view of a gearbox oil passage connection structure 100 provided in another embodiment of this invention. Figure 7 The diagram shown is a partial structural schematic of the first sealing surface 111 in this embodiment.

[0038] Compared to Figure 1The difference in the gearbox oil passage connection structure 100 provided in the embodiment shown is that an annular positioning groove 1121 is provided on the third sealing surface 121. The annular positioning groove 1121 is arranged around the outer periphery of the first oil hole 113. The annular elastic seal 130 is embedded in the annular positioning groove 1121 on one side in the thickness direction, and the annular elastic seal 130 abuts against the fourth sealing surface 122 on the other side in the thickness direction.

[0039] It is understood that the annular positioning groove 1121 in this embodiment is not connected to the first oil hole 113; that is, the annular positioning groove 1121 is located on the outer periphery of the first oil hole 113, and the two are arranged at intervals. The annular elastic seal 130 in this embodiment is an O-ring rubber seal with elastic deformation capability. The thickness of the O-ring rubber seal is greater than the depth of the annular positioning groove 1121. One side of the O-ring rubber seal is embedded in the annular positioning groove 1121 on its thickness side, and the other side abuts against the fourth sealing surface 122. Under the abutting and squeezing action of the first body 110 and the second body 120, the O-ring rubber seal undergoes elastic deformation, achieving a tight fit with the groove wall of the annular positioning groove 1121 and the fourth sealing surface 122, ensuring a static sealing effect.

[0040] Optionally, the annular positioning groove 1121 can be configured as a circular annular groove. Multiple recesses and multiple protrusions are provided on the annular groove periphery of the annular positioning groove 1121, and these recesses and protrusions are arranged alternately in the circumferential direction of the annular positioning groove 1121. The multiple recesses and protrusions can cooperate to form a wave structure, that is, the recesses are concave arc surfaces, and correspondingly, the protrusions are convex arc surfaces, making them less prone to cracking and damage, and ensuring structural stability and reliability. Furthermore, when the annular elastic seal 130 is embedded in the annular positioning groove 1121, the first body 110 and the second body 120 approach each other and apply external force to the annular elastic seal 130. The annular elastic seal 130 can be deformed outwards around its periphery and engage with the recesses and protrusions, improving the positional stability of the annular elastic seal 130 and also increasing the sealing area, thus improving the sealing effect.

[0041] In summary, the gearbox oil passage connection structure 100 provided in this embodiment can reliably connect the lubrication oil passages of two parts when two or more surfaces need to be tightly fitted or have the same fit tolerance, while avoiding over-positioning.

[0042] The above description is merely a specific implementation of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.

Claims

1. A gearbox oil passage connection structure, characterized in that, include: The first body (110), the second body (120), and the annular elastic seal (130); The first body (110) has a first sealing surface (111) and a second sealing surface (112) arranged at intervals, and a first oil hole (113) is provided on the second sealing surface (112); the second body (120) has a third sealing surface (121) and a fourth sealing surface (122) arranged at intervals, and a second oil hole (123) is provided on the fourth sealing surface (122); the first body (110) is connected to the second body (120), and the first sealing surface (111) is in sealing contact with the third sealing surface (121); the annular elastic seal (130) is sandwiched between the second sealing surface (112) and the fourth sealing surface (122).

2. The gearbox oil passage connection structure according to claim 1, characterized in that: When the first sealing surface (111) and the third sealing surface (121) are rigidly abutted, the annular elastic seal (130) sandwiched between the second sealing surface (112) and the fourth sealing surface (122) prevents the second sealing surface (112) from rigidly abutting the fourth sealing surface (122).

3. The gearbox oil passage connection structure according to claim 1, characterized in that: The second sealing surface (112) is provided with an annular positioning groove (1121), which is arranged around the outer periphery of the first oil hole (113); the annular elastic seal (130) is embedded in the annular positioning groove (1121) on one side of its thickness direction, and the annular elastic seal (130) is in contact with the fourth sealing surface (122) on the other side of its thickness direction.

4. The gearbox oil passage connection structure according to claim 3, characterized in that: The annular positioning groove (1121) has recesses and protrusions arranged alternately in its circumferential direction on its groove wall. The annular elastic seal (130) is used to deform radially under external force and can engage with the recesses and protrusions.

5. The gearbox oil passage connection structure according to claim 1, characterized in that: The second sealing surface (112) is provided with a positioning recess (1122), and the first oil hole (113) is opened on the bottom wall of the positioning recess (1122); the annular elastic seal (130) is embedded in the positioning recess (1122) on one side in its thickness direction, and the annular elastic seal (130) is in contact with the fourth sealing surface (122) on the other side in its thickness direction.

6. The gearbox oil passage connection structure according to any one of claims 1-5, characterized in that: The gearbox oil passage connection structure (100) further includes a locking member (140), which is connected to both the first body (110) and the second body (120) and is used to apply a locking force to the first body (110) and the second body (120) so that the first sealing surface (111) and the third sealing surface (121) move closer to each other under the action of the locking force, and so that the second sealing surface (112) and the fourth sealing surface (122) move closer to each other under the action of the locking force.

7. The gearbox oil passage connection structure according to any one of claims 1-5, characterized in that: A sealing adhesive layer is provided on the first sealing surface (111) and / or the third sealing surface (121).

8. The gearbox oil passage connection structure according to any one of claims 1-5, characterized in that: The annular elastic seal (130) is configured as an O-ring rubber seal.

9. The gearbox oil passage connection structure according to any one of claims 1-5, characterized in that: The annular elastic seal (130) is configured as a rubber flat gasket.

10. A gearbox, characterized in that, The gearbox includes: The gearbox oil passage connection structure (100) according to any one of claims 1-9.

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