Power transmission mechanism

Abstract

The utility model relates to the technical field of transmissions, in particular to a power transmission mechanism. The power transmission mechanism comprises: a first transmission member; a second transmission member; the limiting piece comprises a first limiting part, a second limiting part and a connecting part; the connecting part is used for being fixedly connected with the second transmission shaft, the first transmission piece comprises a first contact face abutting against the first limiting part in the axial direction, and the second transmission piece comprises a second contact face abutting against the second limiting part in the axial direction. And a first oil groove is formed in the first limiting part and / or the first contact surface. According to the power transmission mechanism, through the arrangement of the first oil groove and the second oil groove, lubricating oil in the first oil groove and the second oil groove can be squeezed and smeared to the first contact face and the second contact face, so that a lubricating oil film is formed, and the first transmission piece and the second transmission piece are axially limited by the limiting piece; and the abrasion of the contact position between the two parts can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of transmissions, and in particular to a power transmission mechanism. Background Art

[0002] In existing transmissions, many transmissions realize the transmission connection between two transmission shafts through spline structures and transmission parts. Among the multiple parts that realize the transmission, limiters are often required to axially limit the transmission parts that use the spline structure to transmit power, thereby reducing the axial movement of each transmission part. However, while the limiter and the transmission part that needs to rotate are offset in the axial limit, they will also rotate relative to each other. At this time, the contact surface of the two will wear and heat up, which will affect the reliability, stability and service life of the entire transmission. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides a power transmission mechanism.

[0004] The present application provides a power transmission mechanism, comprising:

[0005] A first transmission member, used to be connected to the first transmission shaft;

[0006] A second transmission member, used to be connected to the second transmission shaft and connected to the first transmission member through a spline structure;

[0007] The limiting member comprises a first limiting portion, a second limiting portion and a connecting portion; the connecting portion is used to be fixedly connected to the second transmission shaft, the first transmission member comprises a first contact surface that abuts against the first limiting portion in the axial direction, the first limiting portion and the first contact surface are slidably matched, the second transmission member comprises a second contact surface that abuts against the second limiting portion in the axial direction, the second limiting portion and the second contact surface are slidably matched;

[0008] A first oil groove is provided on the first limiting portion and / or the first contact surface;

[0009] A second oil groove is formed on the second limiting portion and / or the second contact surface.

[0010] Optionally, the first oil groove comprises a first forward oil groove and a first reverse oil groove; the first forward oil groove is provided with an oil guiding inclined surface in a clockwise direction, the first reverse oil groove is provided with an oil guiding inclined surface in a counterclockwise direction, and the first reverse oil groove is arranged adjacent to the first forward oil groove and is located in the counterclockwise direction of the first forward oil groove;

[0011] And / or, the second oil groove includes a second forward oil groove and a second reverse oil groove; the second forward oil groove is provided with an oil guiding slope along the clockwise direction, the second reverse oil groove is provided with an oil guiding slope along the counterclockwise direction, the second reverse oil groove is arranged adjacent to the second forward oil groove, and is located in the counterclockwise direction of the second forward oil groove.

[0012] Optionally, the first oil groove comprises a plurality of groups of the first forward oil grooves and the first reverse oil grooves corresponding to each other, and the plurality of groups of the first forward oil grooves and the first reverse oil grooves are evenly arranged in the circumferential direction;

[0013] And / or, the second oil groove includes a plurality of groups of the second forward oil grooves and the second reverse oil grooves corresponding to each other, and the plurality of groups of the second forward oil grooves and the second reverse oil grooves are evenly arranged in the circumferential direction.

[0014] Optionally, the first forward oil groove is connected to the first reverse oil groove to form an oil groove structure;

[0015] And / or, the second forward oil groove is connected to the second reverse oil groove to form an oil groove structure.

[0016] Optionally, a radially extending width of the first oil groove is not less than a radially extending width of a contact surface between the first limiting portion and the first contact surface;

[0017] And / or, a radially extending width of the second oil groove is not less than a radially extending width of a contact surface between the second limiting portion and the second contact surface.

[0018] Optionally, the oil guiding slope in the first forward oil groove and the oil guiding slope in the first reverse oil groove gradually narrow in the clockwise direction and the counterclockwise direction respectively, and are smoothly connected with the contact surface of the first limiting portion and the first contact surface;

[0019] And / or, the oil guiding slope in the second forward oil groove and the oil guiding slope in the second reverse oil groove gradually narrow in the clockwise direction and the counterclockwise direction respectively, and are smoothly connected to the contact surface of the second limiting portion and the second contact surface.

[0020] Optionally, the oil guiding slope is a fan-shaped structure;

[0021] The fan-shaped opening of the oil guiding inclined surface of the first forward oil groove and / or the second forward oil groove faces the first reverse oil groove and / or the second reverse oil groove in the counterclockwise direction;

[0022] And / or, the fan-shaped opening of the oil guiding slope of the first reverse oil groove and / or the second reverse oil groove faces the first forward oil groove and / or the second forward oil groove in the clockwise direction.

[0023] Optionally, an oil passage communicating with the first oil groove is provided on the first limiting portion and / or the first contact surface;

[0024] And / or, an oil path communicating with the second oil groove is formed on the second limiting portion and / or the second contact surface.

[0025] Optionally, a contact surface between the first limiting portion and the first contact surface is perpendicular to the axial direction of the power transmission mechanism;

[0026] And / or, a contact surface between the second limiting portion and the second contact surface is perpendicular to the axial direction of the power transmission mechanism.

[0027] Optionally, a first annular protrusion coaxially arranged with the contact surface is provided at the inner edge and / or the outer edge of the contact surface between the first limiting portion and the first contact surface, and the first annular protrusion is formed on the first limiting portion and / or the first contact surface;

[0028] And / or, a second annular protrusion coaxially arranged with the contact surface is provided at the inner edge and / or outer edge of the contact surface between the second limiting portion and the second contact surface, and the second annular protrusion is formed on the second limiting portion and / or the second contact surface.

[0029] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:

[0030] The power transmission mechanism provided by the present application, through the arrangement of the first oil groove and the second oil groove, can squeeze and apply the lubricating oil in the first oil groove and the second oil groove to the first contact surface and the second contact surface when the limit member slides with the first contact surface and the second contact surface on both sides, thereby forming a lubricating oil film. While the limit member axially limits the first transmission member and the second transmission member, it can also reduce the wear of the contact position between each other, and can also cool the contact position between the limit member and the first transmission member and the second transmission member, thereby improving the service life and stability of the entire power transmission mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0033] Figure 1 It is a structural schematic diagram of the power transmission mechanism described in the embodiment of the present application;

[0034] Figure 2 This is a schematic structural diagram of the first transmission member described in an embodiment of the present application;

[0035] Figure 3 A partial cross-sectional view of a first oil groove of a first transmission member according to an embodiment of the present application;

[0036] Figure 4 This is a schematic diagram of the structure of the limiter described in the embodiment of the present application;

[0037] Figure 5 This is a cross-sectional view of the limiting member described in an embodiment of the present application.

[0038] Among them, 11, the first transmission member; 111, the first contact surface; 12, the second transmission member; 121, the second contact surface; 13, the limit member; 131, the first limit part; 132, the second limit part; 133, the connecting part; 21, the first oil groove; 211, the first forward oil groove; 212, the first reverse oil groove; 22, the second oil groove; 221, the second forward oil groove; 222, the second reverse oil groove; 23, the oil guide slope; 24, the oil circuit; 251, the first annular protrusion; 252, the second annular protrusion; 31, the first transmission shaft; 32, the second transmission shaft. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0041] In existing transmissions, many transmissions realize the transmission connection between two transmission shafts through spline structures and transmission parts. Among the multiple parts that realize the transmission, limiters are often required to axially limit the transmission parts that use the spline structure to transmit power, thereby reducing the axial movement of each transmission part. However, while the limiter and the transmission part that needs to rotate are offset in the axial limit, they will also rotate relative to each other. At this time, the contact surface of the two will wear and heat up, which will affect the reliability, stability and service life of the entire transmission.

[0042] Based on this, this embodiment provides a power transmission mechanism. Through the arrangement of the first oil groove and the second oil groove, when the limiter slides with the first contact surface and the second contact surface on both sides, the lubricating oil in the first oil groove and the second oil groove can be squeezed and applied to the first contact surface and the second contact surface, thereby forming a lubricating oil film. While the limiter axially limits the first transmission member and the second transmission member, it can also reduce the wear of the contact position between each other, and can also cool the contact position between the limiter and the first transmission member and the second transmission member, thereby improving the service life and stability of the entire power transmission mechanism. The following is a detailed description of this through specific embodiments:

[0043] Reference Figures 1 to 5 As shown, a power transmission mechanism provided in this embodiment includes: a first transmission member 11, which is used to be connected to the first transmission shaft 31; a second transmission member 12, which is used to be connected to the second transmission shaft 32 and is connected to the first transmission member 11 through a spline structure; a limiting member 13, including a first limiting portion 131, a second limiting portion 132 and a connecting portion 133; the connecting portion 133 is used to be fixedly connected to the second transmission shaft 32, the first transmission member 11 includes a first contact surface 111 that abuts against the first limiting portion 131 in the axial direction, and the first limiting portion 131 slides with the first contact surface 111, the second transmission member 12 includes a second contact surface 121 that abuts against the second limiting portion 132 in the axial direction, and the second limiting portion 132 slides with the second contact surface 121; a first oil groove 21 is provided on the first limiting portion 131 and / or the first contact surface 111; a second oil groove 22 is provided on the second limiting portion 132 and / or the second contact surface 121.

[0044] The power transmission mechanism provided in the present embodiment, through the provision of the first oil groove 21 and the second oil groove 22, can squeeze and apply the lubricating oil in the first oil groove 21 and the second oil groove 22 to the first contact surface 111 and the second contact surface 121 on both sides when the limit member 13 slides with the first contact surface 111 and the second contact surface 121 on both sides, thereby forming a lubricating oil film. While the limit member 13 axially limits the first transmission member 11 and the second transmission member 12, it can also reduce the wear of the contact position between each other, and can also cool the contact position between the limit member 13 and the first transmission member 11 and the second transmission member 12, thereby improving the service life and stability of the entire power transmission mechanism.

[0045] Continue to refer to Figure 2 and Figure 4As shown, the first oil groove 21 includes a first forward oil groove 211 and a first reverse oil groove 212; the first forward oil groove 211 is provided with an oil guiding inclined surface 23 in a clockwise direction, the first reverse oil groove 212 is provided with an oil guiding inclined surface 23 in a counterclockwise direction, the first reverse oil groove 212 is arranged adjacent to the first forward oil groove 211, and is located in the counterclockwise direction of the first forward oil groove 211; and / or, the second oil groove 22 includes a second forward oil groove 221 and a second reverse oil groove 222; the second forward oil groove 221 is provided with an oil guiding inclined surface 23 in a clockwise direction, the second reverse oil groove 222 is provided with an oil guiding inclined surface 23 in a counterclockwise direction The inclined surface 23, the second reverse oil groove 222 are arranged adjacent to the second forward oil groove 221, and are located in the counterclockwise direction of the second forward oil groove 221; through the arrangement of the first forward oil groove 211 and the first reverse oil groove 212 and the second forward oil groove 221 and the second reverse oil groove 222, when the limit member 13 and the first transmission member 11 rotate relative to each other in one direction, and when the limit member 13 and the second transmission member 12 rotate relative to each other in one direction, the lubricating oil can be quickly applied to the first contact surface 111 and the second contact surface 121, thereby forming a lubricating oil film; improving the efficiency of forming the lubricating oil film.

[0046] In some embodiments, the first oil groove 21 includes multiple groups of one-to-one corresponding first forward oil grooves 211 and first reverse oil grooves 212, and the multiple groups of first forward oil grooves 211 and first reverse oil grooves 212 are evenly arranged in the circumferential direction; and / or, the second oil groove 22 includes multiple groups of one-to-one corresponding second forward oil grooves 221 and second reverse oil grooves 222, and the multiple groups of second forward oil grooves 221 and second reverse oil grooves 222 are evenly arranged in the circumferential direction; multiple groups of first forward oil grooves 211 and first reverse oil grooves 212 are arranged in sequence and multiple groups of second forward oil grooves 221 and second reverse oil grooves 222 are arranged in sequence, so that when the limit member 13 and the first transmission member 11 rotate relative to each other in one direction, and when the limit member 13 and the second transmission member 12 rotate relative to each other in one direction, the lubricating oil can be applied to the first contact surface 111 and the second contact surface 121 more quickly to form a lubricating oil film; the formation efficiency of the lubricating oil film is improved, and the uniformity of the lubricating oil film is improved at the same time.

[0047] Continue to refer to Figure 2 and Figure 3 As shown, the first forward oil groove 211 is connected with the first reverse oil groove 212 to form an oil groove structure; and / or, the second forward oil groove 221 is connected with the second reverse oil groove 222 to form an oil groove structure; that is, through the forward and reverse rotation of the limit member 13 and the first transmission member 11 and the second transmission member 12, the lubricating oil in the same oil groove can be used to achieve transportation in different directions, and thus a lubricating oil film can be quickly formed regardless of the direction of rotation.

[0048] Continue to refer to Figure 2 As shown, the radially extending width of the first oil groove 21 is not less than the radial width of the contact surface between the first limiting portion 131 and the first contact surface 111; and / or, the radially extending width of the second oil groove 22 is not less than the radial width of the contact surface between the second limiting portion 132 and the second contact surface 121.

[0049] In some embodiments, the oil guiding slope 23 in the first forward oil groove 211 and the oil guiding slope 23 in the first reverse oil groove 212 gradually narrow in the clockwise direction and counterclockwise direction, respectively, and are smoothly connected to the contact surface of the first limit portion 131 and the first contact surface 111; and / or, the oil guiding slope 23 in the second forward oil groove 221 and the oil guiding slope 23 in the second reverse oil groove 222 gradually narrow in the clockwise direction and counterclockwise direction, respectively, and are smoothly connected to the contact surface of the second limit portion 132 and the second contact surface 121; such a setting can further increase the volume of the first oil groove 21 and the second oil groove 22, and at the same time, it can also use rotation to squeeze the lubricating oil into the gradually narrowing oil path, thereby increasing the flow rate of the lubricating oil and forming a Laval nozzle effect.

[0050] In a further embodiment, the oil guiding slope 23 is a fan-shaped structure; the fan-shaped opening of the oil guiding slope 23 of the first forward oil groove 211 and / or the second forward oil groove 221 faces the first reverse oil groove 212 and / or the second reverse oil groove 222 in the counterclockwise direction; and / or, the fan-shaped opening of the oil guiding slope 23 of the first reverse oil groove 212 and / or the second reverse oil groove 222 faces the first forward oil groove 211 and / or the second forward oil groove 221 in the clockwise direction; the oil guiding slope 23 with a fan-shaped structure can convey the lubricating oil more smoothly.

[0051] Continue to refer to Figure 4 and Figure 5 As shown, an oil circuit 24 connected to the first oil groove 21 is provided on the first limiting portion 131 and / or the first contact surface 111; and / or an oil circuit 24 connected to the second oil groove 22 is provided on the second limiting portion 132 and / or the second contact surface 121; oil can be directly supplied to the first oil groove 21 or the second oil groove 22 through the oil circuit 24, thereby ensuring that the lubricating oil film can always be maintained.

[0052] In a further embodiment, the contact surface between the first limit portion 131 and the first contact surface 111 is perpendicular to the axial direction of the power transmission mechanism; and / or the contact surface between the second limit portion 132 and the second contact surface 121 is perpendicular to the axial direction of the power transmission mechanism; so that the axial limitation between the limit member 13 and the first transmission member 11 and between the limit member 13 and the second transmission member 12 is more stable and the relative rotation is smoother, and at the same time the lubricating oil film will not be affected by radial resistance, and is therefore easier to form.

[0053] Continue to refer to Figure 2 and Figure 4 As shown, a first annular protrusion 251 coaxially arranged with the contact surface is provided at the inner edge and / or the outer edge of the contact surface between the first limiting portion 131 and the first contact surface 111, and the first annular protrusion 251 is formed on the first limiting portion 131 and / or the first contact surface 111; and / or, a second annular protrusion 252 coaxially arranged with the contact surface is provided at the inner edge and / or the outer edge of the contact surface between the second limiting portion 132 and the second contact surface 121, and the second annular protrusion 252 is formed on the second limiting portion 132 and / or the second contact surface 121; through the setting of the first annular protrusion 251 and the second annular protrusion 252, an oil retaining effect can be formed at the edges of the first contact surface 111 and the second contact surface 121, thereby reducing the loss of lubricating oil in the radial direction, so that the lubricating oil film can be better maintained.

[0054] The specific implementation method and implementation principle are the same as those in the above embodiment, and can bring the same or similar technical effects, which will not be described one by one here. For details, please refer to the description of the above power transmission mechanism embodiment.

[0055] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0056] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power transmission mechanism, characterized in that: include: A first transmission member (11), used to be connected to a first transmission shaft (31); A second transmission member (12), used to be connected to a second transmission shaft (32), and connected to the first transmission member (11) via a spline structure; The limiting member (13) comprises a first limiting portion (131), a second limiting portion (132) and a connecting portion (133); the connecting portion (133) is used for fixedly connecting with the second transmission shaft (32); the first transmission member (11) comprises a first contact surface (111) abutting against the first limiting portion (131) in the axial direction; the first limiting portion (131) and the first contact surface (111) are in sliding cooperation; the second transmission member (12) comprises a second contact surface (121) abutting against the second limiting portion (132) in the axial direction; the second limiting portion (132) and the second contact surface (121) are in sliding cooperation; A first oil groove (21) is provided on the first limiting portion (131) and / or the first contact surface (111); A second oil groove (22) is provided on the second limiting portion (132) and / or the second contact surface (121).

2. The power transmission mechanism according to claim 1, characterized in that: The first oil groove (21) comprises a first forward oil groove (211) and a first reverse oil groove (212); the first forward oil groove (211) is provided with an oil guiding inclined surface (23) in a clockwise direction, the first reverse oil groove (212) is provided with an oil guiding inclined surface (23) in a counterclockwise direction, and the first reverse oil groove (212) is arranged adjacent to the first forward oil groove (211) and is located in the counterclockwise direction of the first forward oil groove (211); And / or, the second oil groove (22) comprises a second forward oil groove (221) and a second reverse oil groove (222); the second forward oil groove (221) is provided with an oil guiding inclined surface (23) in a clockwise direction, the second reverse oil groove (222) is provided with an oil guiding inclined surface (23) in a counterclockwise direction, and the second reverse oil groove (222) is arranged adjacent to the second forward oil groove (221) and is located in the counterclockwise direction of the second forward oil groove (221).

3. The power transmission mechanism according to claim 2, characterized in that: The first oil groove (21) comprises a plurality of groups of the first forward oil grooves (211) and the first reverse oil grooves (212) corresponding to each other, and the plurality of groups of the first forward oil grooves (211) and the first reverse oil grooves (212) are evenly arranged in the circumferential direction; And / or, the second oil groove (22) comprises a plurality of groups of the second forward oil grooves (221) and the second reverse oil grooves (222) corresponding to each other, and the plurality of groups of the second forward oil grooves (221) and the second reverse oil grooves (222) are evenly arranged in the circumferential direction.

4. The power transmission mechanism according to claim 2, characterized in that: The first forward oil groove (211) is connected to the first reverse oil groove (212) to form an oil groove structure; And / or, the second forward oil groove (221) is connected to the second reverse oil groove (222) to form an oil groove structure.

5. The power transmission mechanism according to claim 2, characterized in that: The width of the first oil groove (21) extending in the radial direction is not less than the width of the contact surface between the first limiting portion (131) and the first contact surface (111) in the radial direction; And / or, the width of the second oil groove (22) extending in the radial direction is not less than the width of the contact surface between the second limiting portion (132) and the second contact surface (121) in the radial direction.

6. The power transmission mechanism according to claim 5, characterized in that: The oil guiding inclined surface (23) in the first forward oil groove (211) and the oil guiding inclined surface (23) in the first reverse oil groove (212) gradually narrow in the clockwise direction and the counterclockwise direction respectively, and are smoothly connected to the contact surface of the first limiting portion (131) and the first contact surface (111); And / or, the oil guiding slope (23) in the second forward oil groove (221) and the oil guiding slope (23) in the second reverse oil groove (222) gradually narrow in the clockwise direction and the counterclockwise direction respectively, and are smoothly connected to the contact surface between the second limiting portion (132) and the second contact surface (121).

7. The power transmission mechanism according to claim 6, characterized in that: The oil guiding inclined surface (23) is a fan-shaped structure; The fan-shaped opening of the oil guiding inclined surface (23) of the first forward oil groove (211) and / or the second forward oil groove (221) faces the first reverse oil groove (212) and / or the second reverse oil groove (222) in the counterclockwise direction; And / or, the fan-shaped opening of the oil guiding slope (23) of the first reverse oil groove (212) and / or the second reverse oil groove (222) faces the first forward oil groove (211) and / or the second forward oil groove (221) in the clockwise direction.

8. The power transmission mechanism according to claim 1, characterized in that: An oil passage (24) communicating with the first oil groove (21) is provided on the first limiting portion (131) and / or the first contact surface (111); And / or, an oil passage (24) communicating with the second oil groove (22) is provided on the second limiting portion (132) and / or the second contact surface (121).

9. The power transmission mechanism according to any one of claims 1 to 8, characterized in that: The contact surface between the first limiting portion (131) and the first contact surface (111) is perpendicular to the axial direction of the power transmission mechanism; And / or, the contact surface between the second limiting portion (132) and the second contact surface (121) is perpendicular to the axial direction of the power transmission mechanism.

10. The power transmission mechanism according to claim 9, characterized in that: A first annular protrusion (251) is provided at the inner edge and / or the outer edge of the contact surface between the first limiting portion (131) and the first contact surface (111) and is coaxially arranged with the contact surface; the first annular protrusion (251) is formed on the first limiting portion (131) and / or the first contact surface (111); And / or, a second annular protrusion (252) coaxially arranged with the contact surface is provided at the inner edge and / or the outer edge of the contact surface between the second limiting portion (132) and the second contact surface (121), and the second annular protrusion (252) is formed on the second limiting portion (132) and / or the second contact surface (121).

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