Double-oil-seal dustproof structure for wheel-side axle of loading machine

Abstract

The utility model relates to the technical field of engineering machinery, in particular to a double-oil-seal dustproof structure for a wheel-side axle of a loading machine, which can prevent external dust from entering oil seals and improve the dustproof effect. Comprising a lower dustproof cover shell, an upper dustproof cover shell, an auxiliary lip, a framework and a blocking component, the auxiliary lip is installed in the lower dustproof cover shell, the framework is installed on the top of the lower dustproof cover shell, the upper dustproof cover shell is located above the framework, a dustproof lip is installed in the upper dustproof cover shell, and the blocking component is installed in the framework.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engineering machinery, in particular to a loader wheel bridge double oil seal dustproof structure. BACKGROUND

[0002] Engineering machinery such as loader, loader is widely used in highway, railway, building, water and electricity, port, mine construction engineering, engineering machinery working condition is bad, often face soil, sandstone, lime, coal and other bulk materials, engineering machinery car, road condition is relatively bad, especially in coastal areas, windy and sandy area, oil seal works easily suffer from garbage, dust and sand and other attacks. Ultimately cause damage to the oil seal, leading to oil seal oil leakage. Prior art announcement number CN204828673U proposes a dustproof oil seal, including spring, metal framework and the rubber sealing body that sets up at the outside and the inside of metal framework, the upper end of the rubber sealing body at the inside of metal framework is opened with main lip, spring is arranged in main lip, still including the high pair lip that sets up at the bottom of rubber sealing body and the first pair lip that sets up at the inside of rubber sealing body at the inside of metal framework, high pair lip is used for with the inner wall contact of dustproof cover, first pair lip is used for with the outer wall contact of axle. But oil seal pair lip or felt structure, can only prevent a small amount of dust into the main lip area. For the environment that often has dust, sand, rain and frost and other dirt outside, can make a large amount of dust gather in the oil seal outside, long-term accumulation ultimately causes dust to enter the main lip area, causes damage to the oil seal. UTILITARY MODEL CONTENTS

[0003] To solve the above technical problem, the utility model provides a loader wheel bridge double oil seal dustproof structure that can prevent dust from entering the oil seal inside, improve dustproof effect.

[0004] The utility model relates to a loader wheel bridge double oil seal dustproof structure, including lower dust cover casing body, upper dust cover casing body, pair lip, framework and blocking part, the pair lip is installed in lower dust cover casing body inside, lower dust cover casing body top installs framework, upper dust cover casing body is located above framework, the dustproof lip is installed in upper dust cover casing body inside, and the blocking part is installed in the inside of framework;Dustproof lip can prevent dust and other sundries from entering the device inside from the connection of the oil seal and the shaft, the blocking part plays the second dustproof effect, avoids the dust and other impurities from the connection of dustproof lip and the shaft to enter the machine inside, and then influences the quality of the material inside the machine, and the pair lip can increase the third dustproof effect, improves dustproof effect.

[0005] Preferably, the first self-tightening coil spring and the second self-tightening coil spring are further included, the upper outer wall of the framework is provided with a first embedded groove, the upper outer wall of the middle part of the upper dustproof cover is provided with a second embedded groove, and the first embedded groove and the second embedded groove are provided with the first self-tightening coil spring and the second self-tightening coil spring; the contraction force of the first self-tightening coil spring and the second self-tightening coil spring can generate a certain radial fastening force on the shaft, and after being used for a period of time, the pressure of the oil seal cutting edge will be rapidly reduced or even disappear, at this time, the first self-tightening coil spring and the second self-tightening coil spring can compensate the self-tightening force of the oil seal at any time.

[0006] Preferably, the blocking component includes a sealing ring, the sealing ring is installed on the inner wall of the framework, and the sealing ring is connected with an oil injection pipe; lubricating oil is injected into the sealing ring through the oil injection pipe, the sealing between the sealing ring and the shaft body is increased, the dustproof effect is achieved, the dust is prevented from entering the inside of the oil seal, and the service life of the oil seal is prolonged.

[0007] Preferably, the framework is provided with an oil injection hole in communication with the oil injection pipe; the oil injection hole facilitates the lubricating oil outside to enter the inside of the sealing ring and facilitates the lubricating oil inside to flow out, and facilitates the replacement and use of the lubricating oil.

[0008] Preferably, the buffer cavity is arranged in the secondary lip and the dustproof lip; the buffer cavity can increase the fastening force between the oil seal and the shaft and increase the close tightness of the oil seal and the shaft.

[0009] Preferably, the secondary lip and the dustproof lip are made of rubber.

[0010] Compared with the prior art, the oil seal has the beneficial effects that the dustproof lip can preliminarily prevent dust and sundries from entering the inside of the device from the connection between the oil seal and the shaft, the blocking component plays a second dustproof role, the dust and sundries outside are prevented from entering the inside of the machine from the connection between the dustproof lip and the shaft, the quality of the substances in the inside of the machine is avoided from being affected, the secondary lip can increase a third dustproof role, and the dustproof effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a structural schematic diagram of the utility model;

[0012] Figure 2 is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 3 is a lower three-dimensional structural schematic diagram of the utility model;

[0014] Figure 4 is an upper view structural schematic diagram of the utility model;

[0015] Figure 5 is a cross-sectional structural schematic diagram of the utility model;

[0016] The following are labels in the attached diagram: 1. Lower dust cover housing; 2. Upper dust cover housing; 3. Secondary lip; 4. Frame; 5. First self-tightening helical spring; 6. Second self-tightening helical spring; 7. Sealing ring; 8. Oil injection pipe; 9. Dust lip. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0018] like Figures 1 to 5 As shown, a secondary lip 3 is installed inside the lower dust cover housing 1, a frame 4 is installed on the top of the lower dust cover housing 1, and the upper dust cover housing 2 is located above the frame 4. A dust lip 9 is installed inside the upper dust cover housing 2. A first inner groove is opened on the upper outer wall of the frame 4, and a second inner groove is opened on the middle outer wall of the upper dust cover housing 2. A first self-tightening coil spring 5 and a second self-tightening coil spring 6 are installed in the first inner groove and the second inner groove. A sealing ring 7 is installed on the inner wall of the frame 4, and an oil injection pipe 8 is connected to the sealing ring 7. An oil injection hole communicating with the oil injection pipe 8 is opened on the frame 4. A buffer cavity is opened inside the secondary lip 3 and the dust lip 9. The secondary lip 3 and the dust lip 9 are made of rubber.

[0019] The dustproof lip 9 can initially prevent dust and other debris from entering the device from the connection between the oil seal and the shaft. Lubricating oil is injected into the sealing ring 7 through the oil injection pipe 8, increasing the seal between the oil seal and the shaft and playing a dustproof role. This prevents dust from entering the oil seal and improves its service life. The buffer cavity can increase the clamping force between the oil seal and the shaft and increase the tightness of the contact area between the oil seal and the shaft. The contraction force of the first self-tightening helical spring 5 and the second self-tightening helical spring 6 can generate a certain radial clamping force on the shaft. After a period of use, the pressure of the oil seal edge will decrease rapidly or even disappear. At this time, the first self-tightening helical spring 5 and the second self-tightening helical spring 6 can compensate for the self-tightening force of the oil seal at any time. The oil injection hole facilitates the entry of external lubricating oil into the sealing ring 7 and facilitates the outflow of internal lubricating oil, making it convenient to replace and use the lubricating oil.

[0020] like Figures 1 to 5As shown, the double oil seal dustproof structure of the wheel bridge of the loader can preliminarily prevent dust and sundries from entering the inside of the device from the connecting part of the oil seal and the shaft during work, the lubricating oil is injected into the sealing ring 7 through the oil injection pipe 8, the sealing between the oil seal and the shaft body is increased, the dustproof effect is achieved, the skeleton 4 can increase the third dustproof effect, the fastening force between the oil seal and the shaft can be increased through the buffer cavity, the close tightness of the adhesion area of the oil seal and the shaft is increased, the contraction force of the first self-tightening spiral spring 5 and the second self-tightening spiral spring 6 can generate a certain radial fastening force on the shaft, after a period of use, the pressure of the oil seal edge will decrease rapidly or even disappear, at this time, the first self-tightening spiral spring 5 and the second self-tightening spiral spring 6 can compensate the oil seal self-tightening force at any time.

[0021] The preferred embodiments of the utility model are described above, it should be pointed out that, for ordinary skilled person in the art, on the premise of not departing from the technical principles of the utility model, a number of improvements and variations can be made, these improvements and variations should also be regarded as the protection scope of the utility model.

Claims

1. A double oil seal dust-proof structure of a wheel bridge of a loader, characterized in that, The dustproof device comprises a lower dustproof shell (1), an upper dustproof shell (2), a secondary lip (3), a framework (4) and a blocking component, the secondary lip (3) is arranged in the lower dustproof shell (1), the framework (4) is arranged on the top of the lower dustproof shell (1), the upper dustproof shell (2) is arranged above the framework (4), the dustproof lip (9) is arranged in the upper dustproof shell (2), and the blocking component is arranged in the framework (4).

2. The double oil seal dust protection structure for a loader wheel bridge as claimed in claim 1, characterized in that, The dustproof device further comprises a first self-tightening coil spring (5) and a second self-tightening coil spring (6), a first embedded groove is formed in the outer wall of the upper part of the framework (4), a second embedded groove is formed in the outer wall of the middle part of the upper dustproof shell (2), and the first self-tightening coil spring (5) and the second self-tightening coil spring (6) are arranged in the first embedded groove and the second embedded groove.

3. The double oil seal dust protection structure for a loader wheel bridge as claimed in claim 1, characterized in that, The blocking component comprises a sealing ring (7), the sealing ring (7) is arranged on the inner wall of the framework (4), and the oil injection pipe (8) is connected to the sealing ring (7).

4. The double oil seal dust protection structure for a loader wheel bridge as claimed in claim 3, wherein An oil injection hole is formed in the framework (4) and communicates with the oil injection pipe (8).

5. The dual oil seal dust protection structure for a loader wheel bridge as set forth in claim 1, wherein Buffer cavities are formed in the secondary lip (3) and the dustproof lip (9).

6. The dual oil seal dust protection structure for a loader wheel bridge as set forth in claim 1, wherein The secondary lip (3) and the dustproof lip (9) are made of rubber.

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