Oil way sealing structure and gear box

Abstract

The utility model belongs to the technical field of gear boxes, and discloses an oil way sealing structure and a gear box. The oil way sealing structure comprises a first matching part and a second matching part, the first matching part is arranged on a fixing component, the first matching part is provided with a first oil hole, and the first oil hole is communicated with an oil injection hole of the fixing component; the second matching part is arranged on the rotating component, the first matching part and the second matching part are connected in an inserted mode and matched in a sealed mode, an oil storage ring cavity is defined between the first matching part and the second matching part, the second matching part is provided with a second oil hole, the first oil hole communicates with the second oil hole through the oil storage ring cavity, and the second oil hole is used for conveying lubricating oil to the lubricating position. The gearbox comprises the oil way sealing structure. According to the oil way sealing structure, conveying and sealing of lubricating oil can be achieved through insertion matching of the first matching part and the second matching part, a sliding ring does not need to be arranged, the structure is simple, the manufacturing cost is reduced, and the good sealing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear boxes, in particular to an oil circuit sealing structure and a gear box. Background Art

[0002] At present, when lubricating the inside of a gearbox, the lubricating oil is mainly transported by a slip ring arranged between the fixed component and the rotating component. The slip ring is generally connected to the rotating component with an interference fit and forms a gap between the fixed component to allow the lubricating oil to flow through. When the gap between the slip ring and the fixed component is small, the normal lubricating effect of the lubricating oil can be achieved, but when the rotating component runs eccentrically, it is very easy to cause interference between the fixed component and the slip ring or even the rotating component, thereby causing damage to the gearbox. When the gap between the slip ring and the fixed component is large, the interference between the slip ring and the fixed component can be effectively avoided, but the lubricating oil will leak to the outside through the gap, and the expected lubrication effect cannot be achieved.

[0003] Therefore, it is urgent to design an oil circuit sealing structure to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide an oil circuit sealing structure and a gear box, which can realize the transportation and sealing of lubricating oil between a rotating component and a fixed component.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Oil circuit sealing structure, including:

[0007] a first matching portion, the first matching portion being provided on the fixing member, the first matching portion having a first oil hole, the first oil hole being in communication with the oil filling hole of the fixing member;

[0008] The second fitting part is arranged on the rotating component, the first fitting part and the second fitting part are plugged into each other and sealed, the first fitting part and the second fitting part form an oil storage ring cavity, the second fitting part has a second oil hole, the first oil hole is connected to the second oil hole through the oil storage ring cavity, and the second oil hole is used to transport lubricating oil to the lubrication position.

[0009] Preferably, the plugging direction of the first mating portion and the second mating portion is parallel to the rotation axis of the rotating component, and the first mating portion and the second mating portion are sealed by a mating gap.

[0010] Preferably, the first fitting portion has a first sealing surface and a second sealing surface, the second fitting portion has a third sealing surface and a fourth sealing surface, the first sealing surface is sealed with the third sealing surface and a first fitting gap is provided between the first sealing surface and the third sealing surface, the second sealing surface is sealed with the fourth sealing surface and a second fitting gap is provided between the second sealing surface and the fourth sealing surface, and the first fitting gap and the second fitting gap are distributed on both sides of the oil storage ring cavity along the axial direction of the rotating component.

[0011] Preferably, along the radial direction of the rotating component, the first fitting gap extends in a straight line or a curve; and / or, along the radial direction of the rotating component, the second fitting gap extends in a straight line or a curve.

[0012] Preferably, the first sealing surface and the third sealing surface are both step surfaces; and / or the second sealing surface and the fourth sealing surface are both step surfaces.

[0013] Preferably, at least a portion of the first sealing surface is matched with the third sealing surface in a concave-convex manner; and / or at least a portion of the second sealing surface is matched with the fourth sealing surface in a concave-convex manner.

[0014] Preferably, the first sealing surface and the second sealing surface are both provided with a first convex tooth, the third sealing surface and the fourth sealing surface are both provided with a first groove matching the first convex tooth, and the first convex tooth is inserted into the first groove and is gap-fitted with the inner wall of the first groove.

[0015] Preferably, the first fitting portion further comprises a first flange, the first flange protruding from the second fitting portion along the axial direction of the rotating member, the first flange being mounted on the rotating member and forming a first sealing cavity with the rotating member, the first sealing cavity being connected to the second fitting gap;

[0016] And / or, the second fitting portion further has a second flange, which protrudes from the first fitting portion along the axial direction of the rotating component. The second flange is mounted on the fixed component and forms a second sealed cavity with the fixed component, and the second sealed cavity is connected to the first fitting gap.

[0017] Preferably, the first matching portion is integrally formed with the fixed member, and the second matching portion is integrally formed with the rotating member;

[0018] Alternatively, the first fitting portion is interference-connected to the inner wall surface of the fixed component, and the second fitting portion is interference-connected to the outer peripheral surface of the rotating component.

[0019] The gear box includes a fixed component, a rotating component and the above-mentioned oil circuit sealing structure, wherein the rotating component is a planetary carrier and the fixed component is a box body.

[0020] The beneficial effects of the present invention are:

[0021] The utility model provides an oil circuit sealing structure, in which the first matching part and the second matching part are respectively arranged on the fixed component and the rotating component, and the first matching part and the second matching part enclose an oil storage ring cavity. Since the first matching part has a first oil hole and the first oil hole is connected with the oil filling hole of the fixed component, and since the second matching part has a second oil hole and the second oil hole is connected with the first oil hole through the oil storage ring cavity, the lubricating oil can flow smoothly to the lubrication position through the oil filling hole, the first oil hole, the oil storage ring cavity and the second oil hole in sequence for lubrication, so as to realize the normal lubrication function of the gear box; since the first matching part and the second matching part are plugged in and sealed with each other, the lubricating oil in the oil storage ring cavity can be well sealed, thereby realizing a good sealing effect; the oil circuit sealing structure can realize the delivery and sealing of the lubricating oil through the plug-in fit of the first matching part and the second matching part, without the need to set a slip ring, the structure is simple, the manufacturing cost is reduced, and it has an excellent sealing effect.

[0022] The gear box provided by the utility model adopts the above-mentioned oil circuit sealing structure, which can realize the transmission and sealing of lubricating oil between the rotating component and the fixed component, has a simple structure and a good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a partial cross-sectional view of the oil circuit sealing structure provided by a specific embodiment of the utility model;

[0024] Figure 2 yes Figure 1 A magnified view of point A;

[0025] Figure 3 It is an overall cross-sectional view of the first matching portion provided by a specific embodiment of the utility model;

[0026] Figure 4 It is an overall cross-sectional view of the second matching portion provided by a specific embodiment of the present utility model.

[0027] In the picture:

[0028] 100-fixing member; 110-oil filling hole;

[0029] 200-rotating member;

[0030] 1-first mating portion; 11-first oil hole; 12-first sealing surface; 13-second sealing surface; 14-first protruding tooth; 15-second groove; 16-first flange; 161-first sealing cavity;

[0031] 2-second mating portion; 21-second oil hole; 22-third sealing surface; 23-fourth sealing surface; 24-first groove; 25-second protruding tooth; 26-second flange; 261-second sealing cavity;

[0032] 3-Oil storage ring cavity. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0034] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] like Figure 1As shown, the utility model provides an oil circuit sealing structure, which includes a first matching part 1 and a second matching part 2. The first matching part 1 is arranged on the fixed component 100, and the first matching part 1 has a first oil hole 11. The first oil hole 11 is connected to the oil filling hole 110 of the fixed component 100; the second matching part 2 is arranged on the rotating component 200, the first matching part 1 and the second matching part 2 are plugged into each other and sealed, and an oil storage ring cavity 3 is formed between the first matching part 1 and the second matching part 2. The second matching part 2 has a second oil hole 21. The first oil hole 11 is connected to the second oil hole 21 through the oil storage ring cavity 3, and the second oil hole 21 is used to transport lubricating oil to the lubrication position.

[0038] In this embodiment, lubricating oil can flow smoothly through the oil injection hole 110, the first oil hole 11, the oil storage ring cavity 3, and the second oil hole 21 to the lubrication position within the rotating component 200 for lubrication, thereby achieving normal lubrication of the gearbox. Because the first mating portion 1 and the second mating portion 2 are plugged into and sealed together, the lubricating oil in the oil storage ring cavity 3 is effectively sealed, achieving a good sealing effect. This oil circuit sealing structure achieves both lubricating oil delivery and sealing through the plug-in mating of the first mating portion 1 and the second mating portion 2, eliminating the need for a slip ring. This simple structure reduces manufacturing costs and provides excellent sealing effect.

[0039] The oil storage ring cavity 3 can be opened on the first matching part 1, or on the second matching part 2, or the oil storage ring cavity 3 is partially located on the first matching part 1 and partially located on the second matching part 2. For example, Figure 2 As shown, an oil storage groove is opened on the outer peripheral surface of the second matching portion 2 along the circumferential direction, and the inner wall of the oil storage groove and the first matching portion 1 are surrounded to form an oil storage annular cavity 3.

[0040] To simplify assembly of the first and second mating portions 1 and 2, the insertion direction of the first and second mating portions 1 and 2 is parallel to the rotation axis of the rotating member 200, and a clearance is provided between the first and second mating portions 1 and 2. The first mating portion 1 is pre-installed on the fixed member 100, and the second mating portion 2 is pre-installed on the rotating member 200. The rotating member 200 is then mounted on the fixed member 100 along its axial direction, achieving insertion and mating of the first and second mating portions 1 and 2.

[0041] There is a surface-to-surface fitting gap seal between the first fitting part 1 and the second fitting part 2, so the sealing area can be increased, thereby further improving the sealing effect; specifically, the first fitting part 1 has a first sealing surface 12 and a second sealing surface 13, and the second fitting part 2 has a third sealing surface 22 and a fourth sealing surface 23. The first sealing surface 12 is sealed with the third sealing surface 22 and there is a first fitting gap between the first sealing surface 12 and the third sealing surface 22. The second sealing surface 13 is sealed with the fourth sealing surface 23 and there is a second fitting gap between the second sealing surface 13 and the fourth sealing surface 23. The first fitting gap and the second fitting gap are distributed on both sides of the oil storage ring cavity 3 along the axial direction of the rotating component 200.

[0042] Specifically, the first mating portion 1 and the second mating portion 2 are both annular structures, and the two are nested and matched along the axial direction of the rotating component 200, wherein the first sealing surface 12 and the second sealing surface 13 are respectively located on both sides of the oil storage ring cavity 3 along the axial direction of the rotating component 200, and the third sealing surface 22 and the fourth sealing surface 23 are also respectively located on both sides of the oil storage ring cavity 3 along the axial direction of the rotating component 200, and the first sealing surface 12 is matched with the third sealing surface 22, and the second sealing surface 13 is matched with the fourth sealing surface 23, so the first matching gap and the second matching gap are distributed on both sides of the oil storage ring cavity 3.

[0043] It is understood that the first and second fitting gaps are respectively connected to the oil storage ring cavity 3, thereby enabling relative rotation between the first and second fitting portions 1, 2. Because the first sealing surface 12 seals with the third sealing surface 22, and the second sealing surface 13 seals with the fourth sealing surface 23, oil within the oil storage ring cavity 3 does not leak out through the first and second fitting gaps.

[0044] Specifically, along the radial direction of the rotating member 200, the first fitting gap extends in a straight line or a curve; and / or, along the radial direction of the rotating member 200, the second fitting gap extends in a straight line or a curve. The first fitting gap and the second fitting gap can seal the lubricating oil in the oil storage ring cavity 3 through a throttling effect. The first fitting gap and the second fitting gap extend in a curve, and the shape of the curve includes but is not limited to a broken line, a sawtooth shape, a wave shape, etc., which can extend the distance of the gap and achieve a better sealing effect for the lubricating oil.

[0045] For example, the first sealing surface 12 and the third sealing surface 22 are both stepped surfaces; and / or the second sealing surface 13 and the fourth sealing surface 23 are both stepped surfaces. The first fitting gap and the second fitting gap extend in a zigzag manner, thereby improving the throttling and sealing effects of the lubricating oil.

[0046] At least a portion of the first sealing surface 12 and the third sealing surface 22 are in a concave-convex fit; and / or at least a portion of the second sealing surface 13 and the fourth sealing surface 23 are in a concave-convex fit. This concave-convex fit further enhances the throttling and sealing effects of the first and second fitting gaps. Specifically, the first sealing surface 12 and the third sealing surface 22 can be curved surfaces, flat surfaces, L-shaped surfaces, or stepped surfaces. The concave-convex fit of at least a portion of the first sealing surface 12 and the third sealing surface 22 further enhances the fit between the first sealing surface 12 and the third sealing surface 22, thereby further extending the length of the first fitting gap and improving the sealing effect of the oil circuit sealing structure. For example, the first sealing surface 12 and the third sealing surface 22 are both stepped surfaces, that is, the first sealing surface 12 and the third sealing surface 22 are both composed of at least three planes connected in sequence perpendicularly, wherein any plane of the first sealing surface 12 can be concave-convexly matched with the opposite plane on the third sealing surface 22, or several mutually parallel planes on the first sealing surface 12 can be concave-convexly matched with several opposite planes on the third sealing surface 22; in another embodiment, the first sealing surface 12 and the third sealing surface 22 are both planes, then a partial area of ​​the first sealing surface 12 can be concave-convexly matched with the third sealing surface 22, or the entire plane can be concave-convexly matched with the third sealing surface 22. Similarly, the concave-convex matching between the second sealing surface 13 and the fourth sealing surface 23 is the same as the concave-convex matching between the first sealing surface 12 and the third sealing surface 22 described above.

[0047] Specifically, if Figure 2 、 Figure 4 As shown, the first sealing surface 12 and the second sealing surface 13 are both provided with a first convex tooth 14, and the third sealing surface 22 and the fourth sealing surface 23 are both provided with a first groove 24 matching the first convex tooth 14. The first convex tooth 14 is inserted into the first groove 24 and is gap-matched with the inner wall of the first groove 24.

[0048] The first sealing surface 12 and the third sealing surface 22 achieve a concave-convex fit through convex teeth and grooves, and the second sealing surface 13 and the fourth sealing surface 23 achieve a concave-convex fit through convex teeth and grooves, which increases the fitting area between the first sealing surface 12 and the third sealing surface 22, and the second sealing surface 13 and the fourth sealing surface 23, so that the first fitting gap and the second fitting gap form a continuous tortuous channel, which greatly improves the sealing effect of the lubricating oil.

[0049] Specifically, the cross-sectional shape of the first protruding teeth 14 includes, but is not limited to, a rectangle, a triangle, and a trapezoid. A second groove 15 is formed between two adjacent first protruding teeth 14, and a second protruding tooth 25 that matches the second groove 15 is formed between two adjacent first grooves 24. The second protruding teeth 25 are inserted into the second grooves 15 and have a clearance fit with the inner wall of the second grooves 15. The cross-sectional shape of the second protruding teeth 25 can also be a rectangle, a triangle, a trapezoid, or other shapes, as long as they can achieve a concave-convex fit with the second grooves 15, and are not limited here.

[0050] When the first sealing surface 12 is a stepped surface, the first protruding teeth 14 can be provided on only one of the stepped surfaces, or the first sealing surface 12 can also be provided with the first protruding teeth 14 on several planes parallel to the step surfaces; similarly, when the second sealing surface 13 is a stepped surface, the first protruding teeth 14 can be provided on only one of the stepped surfaces, or the first protruding teeth 14 can be provided on several planes parallel to the step surfaces.

[0051] like Figure 2 and Figure 3 As shown, in order to further improve the sealing effect of the oil circuit sealing structure, the first matching part 1 also has a first flange 16, the first flange 16 protrudes from the second matching part 2 along the axial direction of the rotating component 200, the first flange 16 is mounted on the rotating component 200 and forms a first sealing cavity 161 between the first flange 16 and the rotating component 200, and the first sealing cavity 161 is connected to the second matching gap; and / or, the second matching part 2 also has a second flange 26, the second flange 26 protrudes from the first matching part 1 along the axial direction of the rotating component 200, the second flange 26 is mounted on the fixed component 100 and forms a second sealing cavity 261 between the first flange 26 and the fixed component 100, and the second sealing cavity 261 is connected to the first matching gap.

[0052] The first sealing cavity 161 and the second sealing cavity 261 extend the length of the second fitting gap and the first fitting gap respectively, thereby enhancing the throttling effect of the first fitting gap and the second fitting gap, thereby further improving the sealing effect.

[0053] The first mating portion 1 is integrally formed with the fixed member 100, and the second mating portion 2 is integrally formed with the rotating member 200. Alternatively, the first mating portion 1 is interference-connected to the inner wall of the fixed member 100, and the second mating portion 2 is interference-connected to the outer circumference of the rotating member 200. The interference connection allows for separate disassembly, making it easy to replace the first mating portion 1 or the second mating portion 2 if damaged.

[0054] Optionally, the first mating portion 1 is integrally formed with the fixed component 100, and the second mating portion 2 is interference-connected to the outer circumference of the rotating component 200; or, the first mating portion 1 is interference-connected to the inner wall of the fixed component 100, and the second mating portion 2 is integrally formed with the rotating component 200.

[0055] This embodiment further provides a gearbox comprising a fixed component 100, a rotating component 200, and the aforementioned oil circuit sealing structure. The rotating component 200 is a planetary carrier, the fixed component 100 is a housing, and the rotating component 200 is disposed within the fixed component 100. In this embodiment, the gearbox does not require a slip ring or other sealing structure. The oil circuit sealing structure provides a seal between the rotating component 200 and the fixed component 100, thereby achieving lubricating oil delivery and sealing. This results in a simple structure and low manufacturing cost.

[0056] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Oil circuit sealing structure, characterized in that: include: A first matching portion (1), the first matching portion (1) being provided on the fixing member (100), the first matching portion (1) having a first oil hole (11), the first oil hole (11) being in communication with the oil filling hole (110) of the fixing member (100); The second matching portion (2) is provided on the rotating component (200); the first matching portion (1) and the second matching portion (2) are plugged into each other and sealed; an oil storage ring cavity (3) is formed between the first matching portion (1) and the second matching portion (2); the second matching portion (2) has a second oil hole (21); the first oil hole (11) is connected to the second oil hole (21) through the oil storage ring cavity (3); and the second oil hole (21) is used to transport lubricating oil to a lubrication position.

2. The oil circuit sealing structure according to claim 1, characterized in that: The plugging direction of the first fitting portion (1) and the second fitting portion (2) is parallel to the rotation axis of the rotating component (200), and the first fitting portion (1) and the second fitting portion (2) are sealed by a fitting gap.

3. The oil circuit sealing structure according to claim 2, characterized in that: The first fitting portion (1) has a first sealing surface (12) and a second sealing surface (13); the second fitting portion (2) has a third sealing surface (22) and a fourth sealing surface (23); the first sealing surface (12) and the third sealing surface (22) are sealed together, and a first fitting gap is provided between the first sealing surface (12) and the third sealing surface (22); the second sealing surface (13) and the fourth sealing surface (23) are sealed together, and a second fitting gap is provided between the second sealing surface (13) and the fourth sealing surface (23); the first fitting gap and the second fitting gap are distributed on both sides of the oil storage ring cavity (3) along the axial direction of the rotating component (200).

4. The oil circuit sealing structure according to claim 3, characterized in that: Along the radial direction of the rotating component (200), the first fitting gap extends in a straight line or a curve; and / or, along the radial direction of the rotating component (200), the second fitting gap extends in a straight line or a curve.

5. The oil circuit sealing structure according to claim 4, characterized in that: The first sealing surface (12) and the third sealing surface (22) are both step surfaces; and / or the second sealing surface (13) and the fourth sealing surface (23) are both step surfaces.

6. The oil circuit sealing structure according to claim 3, characterized in that: At least a portion of the first sealing surface (12) is in concave-convex fit with the third sealing surface (22); and / or at least a portion of the second sealing surface (13) is in concave-convex fit with the fourth sealing surface (23).

7. The oil circuit sealing structure according to claim 6, characterized in that: The first sealing surface (12) and the second sealing surface (13) are both provided with a first convex tooth (14), and the third sealing surface (22) and the fourth sealing surface (23) are both provided with a first groove (24) matching the first convex tooth (14), and the first convex tooth (14) is inserted into the first groove (24) and is gap-matched with the inner wall of the first groove (24).

8. The oil circuit sealing structure according to claim 3, characterized in that: The first fitting portion (1) further comprises a first flange (16), the first flange (16) protruding from the second fitting portion (2) along the axial direction of the rotating member (200), the first flange (16) being mounted on the rotating member (200) and forming a first sealing cavity (161) between the first flange (16) and the rotating member (200), the first sealing cavity (161) being connected to the second fitting gap; And / or, the second fitting portion (2) further has a second flange (26), the second flange (26) protrudes from the first fitting portion (1) along the axial direction of the rotating member (200), the second flange (26) is mounted on the fixed member (100) and forms a second sealing cavity (261) between the second flange (26) and the fixed member (100), and the second sealing cavity (261) is connected to the first fitting gap.

9. The oil circuit sealing structure according to any one of claims 1 to 8, characterized in that: The first matching portion (1) and the fixed component (100) are integrally formed, and the second matching portion (2) and the rotating component (200) are integrally formed; Alternatively, the first fitting portion (1) is interference-connected to the inner wall surface of the fixed component (100), and the second fitting portion (2) is interference-connected to the outer peripheral surface of the rotating component (200).

10. Gear box, characterized in that, The invention comprises a fixed component (100), a rotating component (200) and the oil circuit sealing structure according to any one of claims 1 to 9, wherein the rotating component (200) is a planetary carrier and the fixed component (100) is a box.

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