Novel combined type vehicle kingpin oil seal

Abstract

A novel combined type vehicle kingpin oil seal comprises a movable sealing ring connected with a kingpin, a static sealing ring connected to the outer side of the movable sealing ring, an anti-skid mechanism arranged on the inner wall of the movable sealing ring, and a pressure balance mechanism used for balancing the internal pressure and the external pressure of the movable sealing ring. The movable sealing ring comprises a framework and an elastic layer arranged on the outer side of the framework in a sleeving mode, the elastic layer is connected with the inner wall of the static sealing ring, a plurality of protection lips are arranged above the elastic layer, and the protection lips are in interference fit with the inner wall of the static sealing ring to form a sealing belt. According to the novel combined type vehicle kingpin oil seal, dust, cement and other impurities can be effectively prevented from entering the kingpin oil seal, abrasion of a kingpin and the oil seal is reduced, the service life is prolonged, and driving safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing elements, and in particular relates to a novel combined vehicle kingpin oil seal. Background Art

[0002] The kingpin is the center of rotation of the steering wheel on a traditional car. The stability of the kingpin is an important part of car safety. The sealing performance of the kingpin oil seal for the lubricating medium and its protection against external dust, mud and water are key factors affecting the reliability of the car kingpin. Leakage of the lubricating medium or mud and water entering the kingpin will cause rapid wear and failure of the kingpin, leading to failure of the car's steering system and seriously affecting driving safety.

[0003] An oil seal is a device used to prevent fluid from escaping from joints in machines. The fluid is mostly lubricating oil or grease, and the joints are mostly joint surfaces or rotating shafts of parts. Adding appropriate lubricant between the primary and secondary lips of the oil seal can reduce wear and delay corrosion. During use, impurities that pass through the lips will damage the intersecting surfaces, and heat may accumulate between the two lips, which will aggravate premature wear.

[0004] Traditional kingpin oil seals all use a single-lip, single-frame oil seal type for sealing, which has weak protection against dust, mud and water. How to improve the service life of automobile kingpin oil seals is a key problem in the industry. Therefore, a new type of combined kingpin oil seal is needed to effectively prevent dust, mud and water and other impurities from entering the kingpin and the oil seal. The utility model solves this technical problem. Utility Model Content

[0005] The utility model provides a novel combined vehicle kingpin oil seal, which can effectively prevent impurities such as dust and cement from entering the kingpin oil seal, reduce the wear of the kingpin and the oil seal, extend the service life, and improve driving safety.

[0006] A new type of combined vehicle kingpin oil seal includes a dynamic sealing ring connected to the kingpin, a static sealing ring connected to the outside of the dynamic sealing ring, an anti-slip mechanism arranged on the inner wall of the dynamic sealing ring, and a pressure balancing mechanism for balancing the pressure inside and outside the dynamic sealing ring. A sealing belt is formed between the dynamic sealing ring and the static sealing ring.

[0007] Furthermore, the dynamic sealing ring includes a skeleton and an elastic layer sleeved on the outside of the skeleton, and the elastic layer is connected to the inner wall of the static sealing ring.

[0008] Furthermore, a plurality of protective lips are provided above the elastic layer, and the plurality of protective lips are interference-connected with the inner wall of the static sealing ring to form the sealing belt.

[0009] Furthermore, the anti-slip mechanism includes a plurality of anti-slip strips arranged on the inner wall of the dynamic sealing ring, and the anti-slip strips are sleeved on the outer side of the kingpin.

[0010] Furthermore, the pressure balancing mechanism includes a plurality of leakage holes provided on the dynamic sealing ring, and the plurality of leakage holes are respectively connected to both ends of the dynamic sealing ring.

[0011] The technical effects of the utility model are as follows:

[0012] (1) By providing multiple protective lips on the dynamic seal ring, they form a sealing belt together with the static seal ring to prevent impurities such as mud and sand from entering the kingpin, thereby reducing the wear of the kingpin and oil seal, extending the service life, and improving driving safety;

[0013] (2) When adding lubricating grease to the kingpin, part of the lubricating grease will be discharged from the leakage hole on the dynamic seal ring to maintain the balance of pressure inside and outside the device. When the lubricating grease flows out of the leakage hole, it can be known that the amount of lubricating grease is sufficient, so that the staff can know whether the amount of lubricating grease is added in place;

[0014] (3) The lubricating grease in the leakage hole can block external impurities, preventing impurities such as sand and dust from entering the interior of the device through the leakage hole, thereby reducing the wear of the kingpin;

[0015] (4) Multiple protective lips are interference-connected with the static sealing ring. When the device is in operation, the dynamic sealing ring will drive the multiple protective lips to rotate and realize dynamic sealing with the static sealing ring. During operation, the internal lubricating grease will continuously lubricate the position of the protective lips, which can effectively reduce the wear of the sealing belt;

[0016] (5) The inner wall of the dynamic seal ring is provided with a plurality of anti-slip strips, which can enhance the fastening force of the oil seal formed by the device on the kingpin, avoid relative sliding between the device and the kingpin, and prevent lubricating grease from leaking from between the kingpin and the dynamic seal ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the present utility model.

[0018] Figure 2 It is a cross-sectional view of the dynamic sealing ring in the utility model.

[0019] Figure 3 It is a cross-sectional view of the static sealing ring in the utility model.

[0020] Figure 4 It is a schematic diagram of the leakage hole in the present invention.

[0021] Figure 5Schematic diagram of the structure of a traditional kingpin oil seal.

[0022] Among them, the accompanying drawings are marked as follows: 1. static sealing ring; 2. anti-slip strip; 3. protective lip; 4. frame; 5. elastic layer; 6. leakage hole. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments and drawings.

[0024] See also Figure 1-Figure 4 A new type of combined vehicle kingpin oil seal includes a dynamic sealing ring connected to the kingpin, a static sealing ring 1 connected to the outside of the dynamic sealing ring, an anti-slip mechanism arranged on the inner wall of the dynamic sealing ring, and a pressure balancing mechanism for balancing the pressure inside and outside the dynamic sealing ring. A sealing belt is formed between the dynamic sealing ring and the static sealing ring 1.

[0025] Furthermore, the dynamic seal ring includes a frame 4 and an elastic layer 5 sleeved on the outside of the frame 4. The elastic layer 5 is connected to the inner wall of the static seal ring 1. In this embodiment, the elastic layer 5 is made of elastic rubber material, and the frames 4 of the dynamic seal ring and the static seal ring 1 are both metal frames 4 and are stepped circular thin-walled bodies.

[0026] Furthermore, several protective lips 3 are provided above the elastic layer 5. These lips 3 are interference-engaged with the inner wall of the static seal ring 1 to form a sealing band. In this embodiment, two protective lips 3 are provided above the elastic layer 5, but only one can be provided. Two protective lips 3 are also provided below the elastic layer 5. In this embodiment, the interface of the protective lips 3 is approximately rectangular, with the included angle between their axes being approximately 60°.

[0027] Furthermore, the anti-slip mechanism includes a plurality of anti-slip strips 2 arranged on the inner wall of the dynamic sealing ring, and the anti-slip strips 2 are sleeved on the outer side of the kingpin.

[0028] Furthermore, the pressure balancing mechanism includes a plurality of leakage holes 6 formed on the dynamic seal ring, each of which is connected to both ends of the dynamic seal ring. In this embodiment, there are four leakage holes 6. The specific number and diameter of the leakage holes 6 can be selected and produced according to actual conditions and are not limited here.

[0029] The multiple protective lips 3 in this embodiment, together with the dynamic seal ring and the static seal ring 1, form a protective labyrinth design, the cross-sectional view of which is labyrinth-shaped, thereby better preventing impurities from entering the device, thereby reducing the possibility of impurities wearing the kingpin after passing through the device.

[0030] See also Figure 5 Traditional kingpin oil seals all use a single-lip, single-skeleton, 4-oil seal type for sealing, which has weak protection against lubricating media and dust, mud and water.

[0031] The working principle of this utility model is as follows:

[0032] First, the dynamic seal ring needs to be fastened to the inside of the static seal ring 1. Multiple protective lips 3 are interference-fitted inside the static seal ring 1, allowing the dynamic seal ring to rotate inside the static seal ring 1. Then, the oil seal formed by the dynamic seal ring and the static seal ring 1 is connected to the outside of the kingpin. The anti-slip strip 2 on the inner wall of the dynamic seal ring fits with the kingpin. Then, lubricating grease is added to the kingpin. Some of the lubricating grease will flow into the leakage hole 6, discharging the air inside the device through the leakage hole 6, thereby balancing the pressure. When the lubricating grease flows out of the leakage hole 6, stop injecting it. The anti-slip strip 2 will block the lubricating grease and prevent it from leaking from the connection between the kingpin and the dynamic seal ring.

[0033] When the vehicle starts, the kingpin drives the dynamic seal ring to rotate, and the dynamic seal ring drives the multiple protective lips 3 to rotate, achieving dynamic sealing with the static seal ring 1. During operation, the internal lubricating grease will continuously lubricate the connection between the protective lips 3 and the static seal ring 1, which can effectively reduce the wear caused by rotation;

[0034] Impurities such as mud and sand will be blocked by the sealing belt formed by the static sealing ring 1 and the protective lip 3, preventing the impurities from entering the device, and the lubricating grease in the leakage hole 6 will also block the impurities, further avoiding wear of the device and the kingpin.

[0035] The oil seal structure of this application is a multi-lip combined kingpin oil seal. The structure of this application is suitable for

[0036] 1) Kingpin structure of passenger cars and commercial vehicles;

[0037] 2) Kingpin structure of non-road construction machinery such as loaders, excavators, forklifts, etc.

[0038] 3) Kingpin structure of non-road agricultural machinery such as harvesters.

[0039] For those skilled in the art, it is obvious that the present invention is not limited to the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0040] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A new type of combined vehicle kingpin oil seal, characterized in that: It comprises a dynamic seal ring connected to a kingpin, a static seal ring (1) connected to the outside of the dynamic seal ring, an anti-slip mechanism arranged on the inner wall of the dynamic seal ring, and a pressure balancing mechanism for balancing the pressure inside and outside the dynamic seal ring, and a sealing belt is formed between the dynamic seal ring and the static seal ring (1).

2. The novel combined vehicle kingpin oil seal according to claim 1 is characterized in that: The dynamic sealing ring comprises a frame (4) and an elastic layer (5) sleeved on the outside of the frame (4); the elastic layer (5) is connected to the inner wall of the static sealing ring (1).

3. The novel combined vehicle kingpin oil seal according to claim 2 is characterized in that: A plurality of protective lips (3) are arranged above the elastic layer (5), and the plurality of protective lips (3) are interference-connected with the inner wall of the static sealing ring (1) to form the sealing belt.

4. The novel combined vehicle kingpin oil seal according to claim 1 is characterized in that: The anti-slip mechanism comprises a plurality of anti-slip strips (2) arranged on the inner wall of the dynamic sealing ring, and the anti-slip strips (2) are sleeved on the outer side of the main pin.

5. The novel combined vehicle kingpin oil seal according to claim 2 is characterized in that: The pressure balancing mechanism comprises a plurality of leakage holes (6) provided on the dynamic sealing ring, and the plurality of leakage holes (6) are respectively connected to two ends of the dynamic sealing ring.

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