Oil seal and vehicle transmission component

Abstract

The application provides an oil seal and a vehicle transmission part, and the oil seal comprises an annular oil seal body, a recess is formed on the inner side of the oil seal body, and a control valve is communicated to the inner end face of the oil seal body; the control valve opens the oil discharge channel when the oil gravity in the recess is greater than a set threshold, and closes the oil discharge channel when the oil gravity is less than the set threshold. The oil seal can discharge the metal debris deposited in the recess, prevent the metal debris from scratching the oil seal body, improve the sealing effect of the oil seal, and reduce the risk of oil leakage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealing devices, in particular to an oil seal. BACKGROUND

[0002] The oil seal is simply a seal for lubricating oil, which is generally used to separate the parts that need to be lubricated in the transmission parts from the output parts to prevent oil leakage.

[0003] The existing oil seal sets a lip on the inner hole wall of the oil seal body to effectively prevent oil leakage in order to improve the sealing effect. However, metal debris may scratch the oil seal lip during the movement of the transmission parts, affecting the sealing performance and even causing oil leakage after the oil seal is used for a period of time. SUMMARY

[0004] Therefore, the present application aims to provide an oil seal to improve the sealing performance.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006] An oil seal comprises an annular oil seal body, and a recess is formed on the inner side of the oil seal body, wherein:

[0007] An oil discharge mechanism is arranged in the oil seal body;

[0008] The oil discharge mechanism comprises an oil discharge channel arranged in the oil seal body and a control valve;

[0009] One end of the oil discharge channel is communicated with the recess, and the other end is communicated with the inner side end face of the oil seal body;

[0010] The control valve of the oil seal after installation is located below the axis of the oil seal in the vertical direction, and the control valve is used to control the opening and closing of the oil discharge channel in response to the gravity of the oil in the recess; and

[0011] The control valve opens the oil discharge channel when the oil gravity borne by the control valve is greater than a set threshold value;

[0012] The control valve closes the oil discharge channel when the oil gravity borne by the control valve is less than the set threshold value.

[0013] Further, a main lip and a secondary lip are arranged on the inner hole wall of the oil seal body, and the recess is located between the main lip and the secondary lip.

[0014] Further, the control valve comprises a valve body and an elastic member; the elastic member is elastically pushed on one side of the valve body; and the elastic member is configured to have an elastic pre-tightening force exerted on the valve body, which is the set threshold value; when the oil gravity is less than the set threshold value, the valve body is driven to close the oil discharge channel by the elastic pre-tightening force; and when the oil gravity is greater than the set threshold value, the valve body is driven to open the oil discharge channel by the oil gravity.

[0015] Further, the valve body is a ball arranged in the oil discharge channel; and the elastic member comprises a spring arranged in the oil discharge channel.

[0016] Further, the oil seal body is provided with a baffle; the baffle is arranged transversely to the oil discharge channel, and a communication hole is arranged on the baffle; and the valve body closes the oil discharge channel by abutting on one end of the communication hole.

[0017] Further, the oil seal body is provided with an oil seal framework.

[0018] Further, the oil seal body is provided with a fastening spring; the fastening spring is arranged corresponding to the main lip, and is used for tightening the main lip.

[0019] Further, the oil seal body is provided with a groove on the outer end surface; and the fastening spring is embedded on the side wall of the groove.

[0020] Further, the top of the main lip is formed with a plurality of sub-lips; and the plurality of sub-lips are distributed along the axial direction of the inner hole of the oil seal body.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] (1) The oil seal disclosed by the present application sets an oil discharge channel and a control valve in the oil seal body; the control valve can open and close the oil discharge channel in response to the gravity of the oil in the groove, so as to remove the metal debris deposited in the groove, prevent the metal debris from scratching the oil seal body, improve the sealing effect of the oil seal, and reduce the risk of oil leakage of the oil seal.

[0023] (2) The main lip and the auxiliary lip are arranged simultaneously, which can achieve the effect of double sealing and effectively improve the sealing performance of the oil seal.

[0024] (3) The control valve comprises a valve body and an elastic member, which has a simple structure, is convenient to arrange, and is convenient to open and close the oil discharge channel.

[0025] (4) The valve body is a ball, which is convenient to cooperate with the inner wall of the oil channel and facilitate the opening and closing of the oil channel; and the elastic member is a spring, which can be a standard part and has a low cost.

[0026] (5) The baffle is arranged in the oil seal body, and the communication hole is arranged on the baffle, the oil discharge channel is opened and closed by cooperation of the ball and the communication hole, and the oil liquid channel is better blocked.

[0027] (6) The oil seal framework is arranged in the oil seal body, the oil seal body can be supported, the strength of the oil seal is guaranteed, and the oil seal is prevented from being deformed.

[0028] (7) The fastening spring corresponding to the main lip is arranged on the oil seal body, the part of the oil seal body provided with the main lip is fastened, and the sealing effect is improved.

[0029] (8) The groove is arranged on the outer end surface of the oil seal body, the fastening spring is arranged on the side wall of the groove, the fastening force is better applied to the oil seal lip, and the sealing effect of the main lip is improved.

[0030] (9) The plurality of branch lips are arranged on the top of the main lip and are distributed along the axial direction of the inner hole of the oil seal body, a plurality of sealing channels are formed, the internal oil liquid is prevented from flowing out, and the sealing effect is better.

[0031] Another purpose of the present application is to provide a vehicle transmission component, wherein the oil seal is used.

[0032] The vehicle transmission component and the aforementioned oil seal have the same beneficial effects as the prior art, and will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings that form a part of this application provide further understanding of the present application, the illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0034] Figure 1 The cross-sectional view of the oil seal of the first embodiment of the present application;

[0035] Figure 2 The enlarged view of A of Figure 1

[0036] BRIEF DESCRIPTION OF DRAWINGS

[0037] 1, oil seal body; 2, control valve; 3, baffle; 4, oil seal framework; 5, fastening spring;

[0038] 101, main lip; 1011, branch lip; 102, secondary lip; 103, groove; 104, oil discharge channel; 105, groove; 106, recess;

[0039] 201, valve body; 202, elastic member;

[0040] 301, communication hole.​ Detailed Implementation

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0042] In the description of this invention, unless otherwise expressly defined, the terms "installation," "connection," "linking," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0043] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] Example 1

[0045] This embodiment relates to an oil seal, such as Figure 1 and Figure 2 As shown, the overall structure mainly includes an oil seal body 1 and an oil unloading mechanism located inside the oil seal body 1.

[0046] Based on the above overall structural description, and for the sake of better understanding this embodiment, please refer to the following: Figure 1 and Figure 2 The structure of the oil seal body 1 is described below. The structure of the oil seal body 1 can refer to existing structures. It is generally made of rubber material, and the whole is ring-shaped with an inner hole in the middle and a groove 103 formed on the inner side of the inner hole.

[0047] As a preferred and feasible implementation, the inner wall of the oil seal body 1 is provided with a main lip 101 and a secondary lip 102. The main lip 101 and the secondary lip 102 are arranged around the entire circumference of the inner hole, and the aforementioned groove 103 is formed between the main lip 101 and the secondary lip 102.

[0048] In the above structure, both the main lip 101 and the secondary lip 102 serve a sealing function, preventing external dust from entering and preventing oil leakage. The simultaneous provision of the main lip 101 and the secondary lip 102 creates a double seal, enhancing the sealing effect. The groove 103 formed between the main lip 101 and the secondary lip 102 acts as a transition connecting the two, and it can store a certain amount of oil, providing lubrication for the oil seal.

[0049] As a preferred and feasible implementation scheme, it is still referred to Figure 1As shown, a plurality of sub-lip orifices 1011 are formed on the top of the main lip orifice 101, and the plurality of sub-lip orifices 1011 are spaced along the axial direction of the inner hole of the oil seal body 1, for example Figure 1 In the embodiment, a structure with two sub-lip orifices 1011 is shown. In this way, multiple lines of defense are provided along the axial direction of the inner hole of the oil seal body 1, which can further prevent external dust from entering and can prevent internal oil from flowing out, thereby further improving the sealing effect.

[0050] In the embodiment, an oil seal framework 4 is arranged in the oil seal body 1, which is generally made of metal material and has a hardness greater than that of the oil seal body 1. Therefore, the oil seal body 1 can be supported to ensure the strength of the oil seal, thereby preventing the oil seal from deforming. It should be noted that the cross-sectional shape of the oil seal framework 4 is shown in Figure 1 The embodiment, which is generally in the shape of "L" and is arranged in the circumferential direction of the inner hole. In this way, the strength of the oil seal can be improved.

[0051] As a preferred and feasible implementation, a fastening spring 5 is arranged on the oil seal body 1. Specifically, a groove 105 is arranged on the outer end surface of the oil seal body 1, and the fastening spring 5 is embedded on the side wall of the groove 105. The fastening spring 5 corresponds to the main lip orifice 101 and can be used to tighten the main lip orifice 101, thereby improving the sealing performance of the main lip orifice 101.

[0052] In the embodiment, a recess 106 is also formed on the inner end surface of the oil seal body 1. The recess 106 is preferably annular and arranged around the inner hole of the oil seal body 1. The recess 106 facilitates the close contact between the inner end surface of the oil seal body 1 and other components, thereby improving the sealing performance.

[0053] Still referring to Figure 1 and Figure 2 The main improvement of the embodiment is that an oil discharging mechanism is arranged in the oil seal body 1. Specifically, the oil discharging mechanism mainly includes an oil discharging channel 104 and a control valve 2. The oil discharging channel 104 and the control valve 2 are arranged in the oil seal body 1, and the installed control valve 2 is below the oil seal axis in the vertical direction.

[0054] The one end of the oil discharging channel 104 is communicated with the groove 103, and the other end is communicated to the inner end surface of the oil seal body 1. Specifically, the oil discharging channel includes a first communication section and a second communication section in communication. The other end of the first communication section extends into the groove 103 and is arranged in the radial direction of the inner hole of the oil seal. The second communication section is arranged orthogonally to the first communication section, and the other end of the second communication section extends to the inner end surface of the oil seal body 1.

[0055] In this way, the control valve 2 can control the opening and closing of the oil discharge channel 104 in response to the gravity of the oil in the groove 103. In a specific embodiment, the control valve 2 opens the oil discharge channel 104 when the gravity of the oil it bears is greater than a set threshold, and closes the oil discharge channel 104 when the gravity of the oil it bears is less than the set threshold.

[0056] More specifically, the oil seal body 1 is provided with a baffle 3, which is preferably made of a hard metal material, such as stainless steel, copper, iron, etc., and is arranged transversely across the oil discharge channel 104. The baffle 3 is provided with a communication hole 301, and the valve body 201 can close the oil discharge channel 104 by abutting against one end of the communication hole 301, and can open the oil discharge channel 104 by forcing the valve body 201 to compress the elastic member 202.

[0057] In this structure, the baffle 3 with the communication hole 301 is arranged in the oil seal body 1, which can better cooperate with the valve body 201 to facilitate reliable closing of the oil discharge channel 104.

[0058] Continuing to refer to Figure 1 and Figure 2 The control valve 2 includes a valve body 201 and an elastic member 202. The valve body 201 is preferably a ball arranged in the oil discharge channel 104, and the elastic member 202 includes a spring arranged in the oil discharge channel 104, one end of the spring being fixed to the oil seal frame 4, and the other end of the spring being fixed to the ball, i.e., the elastic member 202 can push the valve body 201 from one side of the valve body 201.

[0059] In this structure, the valve body 201 can be a ball, and can also be other shapes, such as a cone, or other shapes that fit the shape of the communication hole 301. It should be noted that the cross-sectional shape of the valve body 201 should be consistent with the shape of the communication hole 301, and the cross-sectional size of the valve body 201 should gradually transition from smaller than the size of the communication hole 301 to larger than the size of the communication hole 301 from the side closer to the communication hole 301 to the side farther from the communication hole 301, to facilitate reliable plugging of the communication hole 301 by the valve body 201.

[0060] In a specific assembly, the elastic member 202 should have a set threshold elastic pre-tightening force applied to the valve body 201. When the gravity of the oil in the groove 103 is less than the set threshold, the valve body 201 is driven to close the oil discharge channel 104 by the elastic pre-tightening force, which is beneficial for storing a certain amount of oil and lubricating the oil seal. When the gravity of the oil in the groove 103 is greater than the set threshold, the valve body 201 is driven to open the oil discharge channel 104 by the gravity of the oil, which timely discharges the metal debris stored in the groove 103, thereby preventing the metal debris from scratching the main lip 101 and the secondary lip 102.

[0061] The oil seal of the embodiment can better guarantee the sealing effect of the oil seal, can reduce the risk of oil leakage of the oil seal, and has a long service life.

[0062] Embodiment two

[0063] The embodiment relates to a vehicle transmission component, which can be an existing transmission or reducer, and the oil seal of the embodiment is used in the transmission or reducer.

[0064] The vehicle transmission component of the embodiment can timely remove the deposited metal scraps in the groove 103, can prevent the metal scraps from scratching the main lip 101 and the secondary lip 102, can guarantee the sealing effect of the oil seal, can reduce the risk of oil leakage of the oil seal, and can store a certain solution in the groove, which is beneficial to lubrication of the oil seal.

[0065] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An oil seal comprising an annular oil seal body (1), wherein a groove (103) is formed on the inner side of the oil seal body (1), characterized in that: The oil seal body (1) is provided with an oil unloading mechanism; the inner wall of the oil seal body (1) is provided with a main lip (101) and a secondary lip (102), and the groove (103) is located between the main lip (101) and the secondary lip (102); The unloading mechanism includes an unloading channel (104) and a control valve (2) located in the oil seal body (1). One end of the unloading channel (104) is connected to the groove (103), and the other end is connected to the inner end face of the oil seal body (1). The control valve (2) of the installed oil seal is located vertically below the axis of the oil seal. The control valve (2) controls the opening and closing of the oil unloading channel (104) in response to the gravity of the oil in the groove (103); and, The control valve (2) opens the oil unloading channel (104) when the weight of the oil it bears is greater than a set threshold. The control valve (2) closes the oil unloading channel (104) when the weight of the oil it bears is less than the set threshold. The control valve (2) includes a valve body (201) and an elastic element (202); The elastic element (202) elastically pushes against one side of the valve body (201); and, The elastic element (202) is configured to have an elastic preload force applied to the valve body (201) for the set threshold. When the weight of the oil is less than the set threshold, the valve body (201) is driven by the elastic preload to close the oil unloading channel (104). When the weight of the oil is greater than the set threshold, the valve body (201) is driven by the weight of the oil to open the oil unloading channel (104). The oil seal body (1) is provided with an oil seal skeleton (4).

2. The oil seal according to claim 1, characterized in that: The valve body (201) is a ball located in the oil unloading channel (104); The elastic element (202) includes a spring disposed within the oil unloading channel (104).

3. The oil seal according to claim 2, characterized in that: The oil seal body (1) is provided with a baffle (3); The baffle (3) is arranged to cut across the oil unloading channel (104), and a connecting hole (301) is provided on the baffle (3). The valve body (201) closes the oil unloading channel (104) by abutting against one end of the connecting hole (301).

4. The oil seal according to claim 1, characterized in that: The oil seal body (1) is provided with a fastening spring (5); The fastening spring (5) is provided corresponding to the main lip (101) and is used to tighten the main lip (101).

5. The oil seal according to claim 4, characterized in that: The outer end face of the oil seal body (1) is provided with a groove (105). The fastening spring (5) is embedded in the side wall of the groove (105).

6. The oil seal according to any one of claims 1 to 5, characterized in that: The top of the main lip (101) has multiple branch lip openings (1011). Multiple of the split lips (1011) are distributed at intervals along the axial direction of the inner hole of the oil seal body (1).

7. A vehicle transmission component, characterized in that: The vehicle transmission component employs an oil seal as described in any one of claims 1 to 6.

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