Oil seal dust cover for output flange

Abstract

The utility model discloses an oil seal dust cover for an output flange, the oil seal dust cover for the output flange comprises the output flange and a dust cover, the output flange is sleeved on an output shaft of a transmission, the dust cover comprises an axial fitting part and a radial extension part, the output flange is sleeved with the axial attaching part in the mode that the axial attaching part is attached to the circumferential surface of the output flange, and the radial extending part is connected to the axial attaching part in the mode that the whole radial extending part extends in the radial direction of the output flange. The radial extension part is partially close to a shaft shell part, located near the output shaft, of a shell of the transmission, so that external gravel and pollutants are prevented from damaging an oil seal located between the shaft shell part and the output flange through the radial extension part, and then the integrity of the oil seal is ensured. The sealing safety of the output shaft of the transmission is improved, and lubricating oil in the transmission is prevented from leaking from the oil seal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil seal dust cover, in particular to an oil seal dust cover for output flange. BACKGROUND

[0002] In the whole vehicle power transmission system, power is output from the engine and transmitted to the whole vehicle through the transmission. The output shaft of the transmission is sleeved with an output flange, and an oil seal is arranged between the output flange and the transmission housing to prevent the lubricating oil in the transmission from leaking through the oil seal.

[0003] However, in the prior art, when the vehicle drives on a sandstone road or in other harsh environments, the exposed oil seal will be damaged and contaminated by sand and stone, causing the lubricating oil in the transmission to leak, and even causing the transmission to be damaged. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems and achieve at least one advantage of the present application, the present application provides an oil seal dust cover for output flange, wherein the oil seal dust cover for output flange comprises:

[0005] an output flange, which is sleeved on the output shaft of the transmission;

[0006] a dust cover, which comprises an axial fitting part and a radial extension part, the axial fitting part is sleeved on the output flange in a manner of fitting the circumferential surface of the output flange, the radial extension part is connected to the axial fitting part in a manner of extending along the radial direction of the output flange as a whole, and the radial extension part is close to the shaft housing part of the housing of the transmission near the output shaft, so as to block the sand and pollutants in the external environment from damaging the oil seal between the shaft housing part and the output flange through the radial extension part.

[0007] According to an embodiment of the present application, the axial fitting part is sleeved on the output flange in an interference fit manner.

[0008] According to an embodiment of the present application, the axial fitting part extends along the axial direction of the output flange by a predetermined width.

[0009] According to an embodiment of the present application, the radial extension part comprises two extension bodies and a bending body, both of the two extension bodies extend along the radial direction of the output flange, one of the two extension bodies is connected to the end of the axial fitting part away from the shaft housing part, the bending body is connected between the two extension bodies, and the bending body is inclined towards the shaft housing part, so that the other extension body is close to the shaft housing part.

[0010] According to an embodiment of the present application, the radial extension portion comprises a plurality of extension bodies and a plurality of bending bodies, the plurality of extension bodies and the plurality of bending bodies are connected alternately in a manner of extending along the radial direction of the output flange, the bending bodies are inclined towards the shaft housing portion, one of the extension bodies is connected to the end of the axial abutment portion away from the shaft housing portion, and another of the extension bodies is close to the shaft housing portion.

[0011] According to an embodiment of the present application, the radial extension portion comprises an extension body extending along the radial direction of the output flange, the extension body is connected to the end of the axial abutment portion close to the shaft housing portion, and the extension body is partially close to the shaft housing portion.

[0012] According to an embodiment of the present application, a clearance space is formed between one of the extension bodies close to the axial abutment portion and the bending body.

[0013] According to an embodiment of the present application, the output flange has a stop step, and the extension body connected to the axial abutment portion abuts against the stop step.

[0014] According to an embodiment of the present application, the dust cover further comprises an axial sheathing portion, the axial sheathing portion is connected to the extension body away from the axial abutment portion, and the axial sheathing portion extends along the surface of the housing portion at a predetermined distance from the shaft housing portion.

[0015] According to an embodiment of the present application, the axial abutment portion, the radial extension portion and the axial sheathing portion are integrally stamped. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A perspective view of a preferred embodiment of the present application is shown, which is only a partial structure of the housing of the transmission.

[0017] Figure 2 A sectional view of Figure 1 is shown.

[0018] Figure 3 An enlarged view of Figure 2 at A is shown. DETAILED DESCRIPTION

[0019] The following description is provided so as to enable any person skilled in the art to practice the present application. The preferred embodiments described in the following description are only examples of the present application and other obvious variants are possible to those skilled in the art. The principles defined in the following description can be applied to other embodiments, variants, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0020] Those skilled in the art should understand that in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.

[0021] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0022] Reference Figures 1 to 3 According to a preferred embodiment of the present application, the dust cover for the output flange will be described in detail below, wherein the dust cover for the output flange comprises an output flange 10 and a dust cover 20.

[0023] Specifically, the output flange 10 is sleeved on an output shaft 91 of a transmission. The dust cover 20 comprises an axial fitting portion 21 and a radial extension portion 22. The axial fitting portion 21 is sleeved on the output flange 10 in a manner of fitting the circumferential surface of the output flange 10. The radial extension portion 22 is connected to the axial fitting portion 21 in a manner of extending in the radial direction of the output flange 10 as a whole, and the radial extension portion 22 is partially close to an axial shell portion 921 of a housing 92 of the transmission near the output shaft 91, so as to block sand and pollutants from the outside to damage an oil seal 93 between the axial shell portion 921 and the output flange 10 through the radial extension portion 22, thereby ensuring the integrity of the oil seal 93, improving the sealing safety of the output shaft 91 of the transmission, and preventing the lubricating oil in the transmission from leaking from the oil seal 93 to avoid damage to the transmission.

[0024] Preferably, the axial fitting portion 21 is sleeved on the output flange 10 in a manner of interference fit, so as to enhance the stability of the connection between the output flange 10 and the axial fitting portion 21.

[0025] More preferably, the axial fitting portion 21 extends a predetermined width in the axial direction of the output flange 10, so as to increase the contact area between the axial fitting portion 21 and the circumferential surface of the output flange 10, thereby reducing the possibility of the axial fitting portion 21 slipping off the surface of the output flange 10.

[0026] In the present embodiment, the radial extension 22 comprises two extension bodies 221 and a bent body 222. Both of the extension bodies 221 extend in the radial direction of the output flange 10, and one of the extension bodies 221 is connected to the end of the axial abutting portion 21 away from the shaft shell portion 921. The bent body 222 is connected between the two extension bodies 221, and the bent body 222 is inclined toward the shaft shell portion 921, so that the other extension body 221 is close to the shaft shell portion 921.

[0027] In another variant embodiment, the radial extension 22 comprises a plurality of extension bodies 221 and a plurality of bent bodies 222. The plurality of extension bodies 221 and the plurality of bent bodies 222 are alternately connected in the manner of extending in the radial direction of the output flange 10. The bent bodies 222 are inclined toward the shaft shell portion 921. One of the extension bodies 221 is connected to the end of the axial abutting portion 21 away from the shaft shell portion 921, and the other extension body 221 is close to the shaft shell portion 921.

[0028] In yet another variant embodiment, the radial extension 22 comprises one extension body 221. The extension body 221 extends in the radial direction of the output flange 10. The extension body 221 is connected to the end of the axial abutting portion 21 close to the shaft shell portion 921, and the extension body 221 is partially close to the shaft shell portion 921 and partially close to the oil seal 93. In the present variant embodiment, since the radial extension 22 of the dust cover 20 only comprises the extension body 221, the overall material of the dust cover 20 is less, thereby saving the manufacturing cost of the dust cover 20.

[0029] For those skilled in the art to understand the present application, in at least one embodiment of the present application, only the case that the radial extension 22 comprises two extension bodies 221 and a bent body 222 is described.

[0030] It is worth mentioning that the extension body 221 and the bent body 222 can prevent the oil seal 93 from being damaged by sand and pollutants from the outside, and since the extension body 221 is close to the shaft shell portion 921, i.e. there is a gap between the extension body 221 and the shaft shell portion 921, when the radial extension 22 as a whole is driven by the output flange 10 through the axial abutting portion 21 to rotate with the output shaft 91, the extension body 221 is prevented from contacting the shaft shell portion 921 to hinder the output shaft 91 from driving the output flange 10 to rotate.

[0031] Preferably, a clearance space 2201 is formed between one of the extension bodies 221 and the bending body 222 near the axial fitting portion 21, so that when the oil seal 93 loosens due to long-term use and partially separates from the shaft housing portion 921 and the output flange 10, the clearance space 2201 can accommodate the part of the oil seal 93 that has separated from the shaft housing portion 921 and the output flange 10, so as to prevent the part of the oil seal 93 from hindering the output shaft 91 from driving the output flange 10 to rotate due to contact with the radial extension portion 22.

[0032] Preferably, the output flange 10 has a stop step 11. The extension body 221 connected to the axial fitting portion 21 abuts against the stop step 11.

[0033] It is understood that when the axial fitting portion 21 is fitted onto the output flange 10 in an interference fit manner, the position of the axial fitting portion 21 on the surface of the output flange 10 is restricted by the contact between the extension body 221 connected to the axial fitting portion 21 and the abutment step 11, thereby determining the relative position between the dust cover 20 and the shaft housing portion 921, so that the other extension body 221 is close to the shaft housing portion 921 and a gap is formed between the other extension body 221 and the shaft housing portion 921. When the radial extension portion 22 is driven by the output flange 10 through the axial fitting portion 21 and rotates with the output shaft 91, it prevents the output shaft 91 from driving the output flange 10 to rotate due to the contact between the extension body 221 and the shaft housing portion 921.

[0034] Preferably, the dust cover 20 further includes an axial enclosure portion 23. The axial enclosure portion 23 is connected to the extension body 221 away from the axial fitting portion 21, and the axial enclosure portion 23 extends along the surface of the housing 92 at a predetermined distance from the axial enclosure portion 921.

[0035] As an example, by Figure 3 As shown, the gap between the extension body 221, which is away from the axial fitting portion 21, and the shaft housing portion 921 is defined as the radial gap, and the gap between the axial enclosure portion 23 and the shaft housing portion 921 is defined as the axial gap. The radial gap and the axial gap are interconnected, and the interconnected radial gap and the axial gap are bent as a whole.

[0036] Therefore, a small amount of sand and pollutants from the outside enters the rear, and since the dust cover 20 is driven to rotate by the output flange 10 as a whole by the output shaft 91, the sand and pollutants entering the axial gap between the axial sheath portion 23 and the shaft sheath portion 921 will be thrown and attached to the surface of the axial sheath portion 23 due to contact with the axial sheath portion 23, so that the sand and pollutants in the axial gap cannot reach the oil seal 93 through the radial gap, thereby preventing the sand and pollutants from the outside from damaging the oil seal 93.

[0037] When the dust cover 20 is driven to rotate by the output flange 10 as a whole by the output shaft 91, an airflow is formed between the end of the axial sheath portion 23 away from the extension body 221 and the shaft sheath portion 921, so as to reduce the probability of sand and pollutants from the outside entering the axial gap between the axial sheath portion 23 and the shaft sheath portion 921.

[0038] When the dust cover 20 is driven to rotate by the output flange 10 as a whole by the output shaft 91 and gradually stops rotating, the sand and pollutants in the axial gap will gradually fall back to the surface of the shaft sheath portion 921, and under the driving of the airflow formed between the end of the axial sheath portion 23 away from the extension body 221 and the shaft sheath portion 921, the sand and pollutants in the axial gap are brought out of the axial gap.

[0039] Preferably, the axial fitting portion 21, the radial extension portion 22, and the axial sheath portion 23 are integrally stamped.

[0040] It is worth mentioning that since the bending directions of the axial sheath portion 23 and the axial fitting portion 21 are consistent, and the bending body 222 is inclined to facilitate the demolding of the axial fitting portion 21, the radial extension portion 22, and the axial sheath portion 23 from the mold when stamping the axial fitting portion 21, the radial extension portion 22, and the axial sheath portion 23.

[0041] Those skilled in the art should understand that the embodiments of the present application described above and shown in the drawings are only examples and do not limit the present application. The advantages of the present application have been fully and effectively achieved. The functions and structural principles of the present application have been shown and described in the embodiments, and any modification or change of the embodiments of the present application can be made without departing from the principles.

Claims

1. A dust shield for an oil seal of an output flange, characterized by, The oil seal dust cover for the output flange comprises: an output flange, which is sleeved on an output shaft of a transmission; a dust cover, which comprises an axial fitting portion and a radial extension portion, the axial fitting portion is sleeved on the output flange in a manner of fitting on a circumferential surface of the output flange, the radial extension portion is connected to the axial fitting portion in a manner of extending along a radial direction of the output flange as a whole, and the radial extension portion is partially close to a shaft shell portion of a housing of the transmission near the output shaft, so as to block sand and pollutants from the outside to damage an oil seal between the shaft shell portion and the output flange through the radial extension portion.

2. The oil seal dust shroud for an output flange according to claim 1, characterized by, The axial fitting portion is sleeved on the output flange in a manner of interference fit.

3. The oil seal dust shroud for an output flange according to claim 2, characterized by, The axial fitting portion extends along an axial direction of the output flange by a predetermined width.

4. The oil seal dust shroud for an output flange according to claim 3, characterized by, The radial extension portion comprises two extension portions and a bending portion, both of the extension portions extend along the radial direction of the output flange, one of the extension portions is connected to an end of the axial fitting portion away from the shaft shell portion, and the bending portion is connected between the two extension portions and is inclined towards the shaft shell portion, so that the other extension portion is close to the shaft shell portion.

5. The oil seal dust shroud for an output flange according to claim 3, characterized by, The radial extension portion comprises a plurality of extension portions and a plurality of bending portions, the extension portions and the bending portions are alternately connected in a manner of extending along the radial direction of the output flange, the bending portions are inclined towards the shaft shell portion, one of the extension portions is connected to an end of the axial fitting portion away from the shaft shell portion, and the other extension portion is close to the shaft shell portion.

6. The oil seal dust shroud for an output flange according to claim 3, characterized by, The radial extension portion comprises an extension portion, which extends along the radial direction of the output flange, the extension portion is connected to an end of the axial fitting portion close to the shaft shell portion, and the extension portion is partially close to the shaft shell portion.

7. The oil seal dust shroud for an output flange according to claim 4, wherein An avoiding space is formed between one of the extension portions close to the axial fitting portion and the bending portion.

8. The oil seal dust shroud for an output flange according to claim 7, characterized by, The output flange has a resisting step, the extension portion connected to the axial fitting portion abuts against the resisting step.

9. The oil seal dust shroud for an output flange according to claim 8, wherein The dust cover further comprises an axial sheathing portion, which is connected to the extension portion away from the axial fitting portion, and the axial sheathing portion extends along the surface of the housing at a predetermined distance from the shaft shell portion.

10. The oil seal dust shroud for an output flange according to claim 9, wherein The axial fitting portion, the radial extension portion and the axial sheathing portion are integrally stamped.

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