A dust guard for a reducer oil seal

Abstract

The utility model relates to a dustproof device of oil seal, concretely relates to a dustproof device of speed reducer oil seal. Including support seat and the bearing seat of setting at the outer edge of support seat, support bearing is arranged between support seat and bearing seat, and the clearance fit place of support seat and bearing seat is provided with floating oil seal, the clearance of support seat and bearing seat is curved channel structure, the channel structure is provided with and is sealed up the clearance through felt, to block the impurity and enter the inside of oil seal. The device can effectively prevent dust and impurities from entering the floating oil seal, and good protection effect is formed to the oil seal. A sealing groove is designed on the bearing seat to assemble the felt, the felt is closely assembled in the sealing groove, and the inner hole is gapless with the support seat. The characteristics of felt are utilized, impurities can be effectively prevented from entering, and even mud can effectively isolate the mud outside.

Description

Technical Field

[0001] This utility model relates to a dustproof device for an oil seal, specifically a dustproof device for a gearbox oil seal. Background Technology

[0002] Engineering speed reducers are generally used in complex and harsh working environments, especially travel speed reducers, which frequently drive the entire machine on muddy, dusty, or even off-road surfaces. This places very high demands on the quality of the speed reducer's oil seals, which must prevent internal oil leakage while also preventing external dust and impurities from entering the speed reducer. Currently, floating oil seals are commonly used in travel speed reducers. These are rotary sealing structures composed of steel and rubber rings, providing a certain degree of dust protection.

[0003] The travel reducer using a floating oil seal structure mainly consists of a support base, a floating oil seal, a support bearing, and a bearing housing. The support base is fixed to the vehicle frame and remains stationary. The bearing housing connects to the wheel or track drive wheel, which rotates around the support base with the help of the support bearing, thereby driving the entire vehicle to move.

[0004] Currently, the most common structure for floating oil seals relies on the floating oil seal itself for both sealing the lubricating oil and protecting against external dust. However, in harsh environments, dust can enter the floating oil seal, causing abnormal wear and damage, which in turn leads to oil leakage from the travel reducer and loss of travel function.

[0005] In response to the above problems, some manufacturers have adopted measures such as... Figure 1 The labyrinth seal shown is designed to prevent large dust and impurities from entering. However, it offers no protection against fine particles, especially mud and slurry, which can still cause wear on the floating oil seal and lead to its failure.

[0006] According to the search, patent 201920940041.7 discloses a sealing structure, a traveling mechanism, and an excavator. With the increase in the number of sealing surfaces, the total area of ​​the sealing surfaces increases while the area of ​​a single sealing surface is the same as that of a single sealing surface in the prior art. This improves the sealing structure's ability to prevent external mud and dust from entering the traveling reducer, reduces the failure of floating oil seals and oil leakage caused by the intrusion of mud and dust, and extends the fault-free working time of the traveling mechanism.

[0007] However, such structures require high machining precision and cannot completely prevent impurities from entering. Therefore, inventing a dustproof device with a simple structure that can effectively prevent mud and dust impurities from entering the reducer and effectively reduce the failure of the walking mechanism has great economic significance and practical value. Utility Model Content

[0008] This invention addresses the shortcomings of existing technologies by designing a dustproof device for a gearbox oil seal. This device effectively prevents dust and impurities from entering the floating oil seal, providing excellent protection. A sealing groove is designed on the bearing housing for mounting felt. The felt is tightly fitted within the sealing groove, with its inner hole fitting seamlessly with the support base. Utilizing the properties of the felt, it effectively prevents impurities from entering, even effectively keeping mud and water out.

[0009] The technical means adopted by this utility model to solve the above problems are as follows:

[0010] A dustproof device for a speed reducer oil seal is provided, including a support base and a bearing housing disposed on the outer edge of the support base. The bearing housing is disposed between the support base and the bearing housing, and a floating oil seal is disposed at the clearance fit between the support base and the bearing housing. The clearance between the support base and the bearing housing is a curved channel structure, and the channel structure is provided with a gap sealed by felt to prevent impurities from entering the interior of the oil seal.

[0011] The dustproof device of this reducer oil seal sets the gap between the support seat and the bearing seat as a curved channel structure, which can effectively prevent the passage of foreign impurities. At the same time, it works in conjunction with the felt sealing gap. With the help of the air permeability of the felt, it can effectively block the entry of impurities, which is more conducive to the use of the reducer oil seal and ensures its service life.

[0012] Furthermore, the support base includes a first boss extending towards the bearing seat, and a second boss is provided on the opposite side of the bearing seat and the support base. The first boss and the second boss are stacked vertically to form a gap; the felt connects the first boss and the second boss. The stacked first and second bosses form staggered narrow channels, which can increase the difficulty for debris to pass through. Combined with the structural design of the felt, it can effectively block and isolate external debris and dust, keeping the inside of the oil seal pure and uncontaminated.

[0013] Furthermore, the first boss includes a first neck surface and a first guide surface, the first neck surface and the first guide surface are connected by a transverse bearing surface to form an L-shape in cross section; the first guide surface and the second neck surface are set at an angle.

[0014] Furthermore, the second protrusion includes an inverted L-shaped structure disposed opposite to the first neck surface, and the inverted L-shaped structure and the first neck surface form a receiving cavity communicating with the outside.

[0015] Furthermore, the second boss also includes a connection to the inverted L-shaped structure via a second guide surface and a third neck surface.

[0016] Furthermore, a sealing groove is provided at the bottom of the second boss, and the sealing groove has a frustum-shaped structure.

[0017] Furthermore, the felt has the same internal cavity structure as the sealing groove.

[0018] Furthermore, the bottom of the felt is attached to the transverse bearing surface, covering the connection between the first guide surface and the transverse bearing surface.

[0019] Furthermore, the second neck surface and the third neck surface form a channel structure, the channel structure including a top narrow area and a channel body with a rectangular cross-section coinciding with the center of the floating oil seal.

[0020] Furthermore, the felt is disposed at the open end of the top narrow section.

[0021] The advantages of this utility model compared to the prior art are:

[0022] 1. The dustproof device for the reducer oil seal of this utility model is reasonably designed with a first boss, a second boss, and a felt structure, which can effectively prevent dust and impurities from entering the floating oil seal and provide good protection for the oil seal.

[0023] 2. This utility model features a sealing groove designed on the bearing housing for assembling felt. The felt is tightly fitted within the sealing groove, and the inner hole fits the support seat without any clearance. This dustproof device has a simple structure, is easy to assemble, and is readily applicable. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the dustproof device for an existing gearbox oil seal.

[0025] Figure 2 This is a schematic diagram of the dustproof device for the reducer oil seal of this utility model.

[0026] Among them, 1-support seat, 2-floating oil seal, 3-sealing groove, 4-bearing seat, 5-channel structure, 6-felt, 11-first neck surface, 12-first guide surface, 13-second neck surface, 14-lateral bearing surface, 41-inverted L-shaped structure, 42-second guide surface, 43-third neck surface, 51-top narrow area, 52-channel body. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings. The drawings are for illustrative purposes only, representing schematic diagrams only, not actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Example 1

[0028] like Figure 2As shown, the dustproof device for the reducer oil seal in this embodiment includes a support base 1 and a bearing seat 4 disposed on the outer edge of the support base 1. A support bearing is disposed between the support base 1 and the bearing seat 4, and a floating oil seal 2 is disposed at the clearance fit between the support base 1 and the bearing seat 4. The clearance between the support base 1 and the bearing seat 4 is a curved channel structure 5, which is provided with a felt 6 to seal the clearance and prevent impurities from entering the oil seal. This dustproof device sets the clearance between the support base 1 and the bearing seat 4 as a curved channel structure, which can effectively prevent the passage of external impurities. At the same time, the felt 6 seals the clearance, and the air permeability of the felt 6 can effectively prevent impurities from entering, which is more conducive to the use of the reducer oil seal and ensures its service life.

[0029] In this embodiment, the support base 1 includes a first boss extending toward the bearing seat 4, and a second boss is provided on the opposite side of the bearing seat 4 and the support base 1. The first boss and the second boss are stacked vertically to form a gap; the felt 6 connects the first boss and the second boss.

[0030] Specifically, the first boss includes a first neck surface 11 and a first guide surface 12, which are connected by a transverse bearing surface 14 to form an L-shape. The first guide surface 12 and the second neck surface 13 are angled, preferably 110°-130° in this embodiment. The second boss includes an inverted L-shaped structure 41 opposite to the first neck surface 11, which together with the first neck surface 11 forms a receiving cavity communicating with the outside. The first and second bosses are stacked vertically to form staggered narrow channels, which increases the difficulty for debris to pass through. Combined with the felt structure, it can effectively block and isolate external debris and dust, keeping the inside of the oil seal pure and uncontaminated.

[0031] The second boss also includes a connection between the inverted L-shaped structure 41 and the third neck surface 43 via a second guide surface 42. The first boss and the second boss form a channel that is wide at the top and narrow at the bottom to effectively prevent the passage of large particles of impurities. Preferably, the transverse bearing surface 14 and the bottom of the second boss are both planar structures, and they are arranged parallel to each other to form a narrow gap. The gap is then sealed by felt 6, so that small impurities are effectively blocked and filtered outside the reducer oil seal.

[0032] Specifically, a sealing groove 3 is provided at the bottom of the second protrusion, and the sealing groove 3 has a frustoconical structure. This is to ensure a tight fit between the felt 6 and the inner cavity structure of the sealing groove 3. The bottom of the felt 6 is in contact with the transverse bearing surface 14, covering the connection between the first guide surface 12 and the transverse bearing surface 14. This structural arrangement allows the felt 6 to directly abut against the channel structure 5.

[0033] The second neck surface 13 and the third neck surface 43 form a channel structure 5. The channel structure 5 includes a top narrow section 51 and a channel body 52 with a rectangular cross-section that coincides with the center of the floating oil seal 2. The top narrow section 51 is designed to form a narrow gap with the first boss and the second boss. Felt 6 is disposed at the opening end of the top narrow section 51. The felt 6 itself is made of readily available material. Utilizing the properties of felt, it can effectively prevent impurities from entering. Even mud and water can be effectively isolated, allowing only water to enter. In this embodiment, strip-shaped felt is preferred. The felt 6 can be inserted into the sealing groove 3 according to its shape. Since the felt 6 has a certain deformation, it can effectively fill the gap between the first boss and the second boss tightly, making it difficult for even small impurities or dust to pass through.

[0034] The dustproof device for the reducer oil seal of this utility model is reasonably designed with a first boss, a second boss, and a felt structure, which can effectively prevent dust and impurities from entering the floating oil seal and provide good protection for the oil seal.

[0035] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the scope of this utility model, and these should also be considered within the protection scope of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A dustproof device for a reducer oil seal, comprising a support base (1) and a bearing housing (4) disposed on the outer edge of the support base (1), characterized in that, A support bearing is provided between the support seat (1) and the bearing seat (4), and a floating oil seal (2) is provided at the gap between the support seat (1) and the bearing seat (4); the gap between the support seat (1) and the bearing seat (4) is a curved channel structure (5), and the channel structure (5) is provided with a felt (6) to seal the gap so as to prevent impurities from entering the oil seal.

2. The dustproof device for the reducer oil seal according to claim 1, characterized in that, The support base (1) includes a first boss extending toward the bearing seat (4), and a second boss is provided on the opposite side of the bearing seat (4) and the support base (1). The first boss and the second boss are stacked vertically to form a gap; the felt (6) connects the first boss and the second boss.

3. The dustproof device for the reducer oil seal according to claim 2, characterized in that, The first boss includes a first neck surface (11) and a first guide surface (12). The first neck surface (11) and the first guide surface (12) are connected by a transverse bearing surface (14) to form an L-shape. The first guide surface (12) and the second neck surface (13) are set at an angle.

4. The dustproof device for the reducer oil seal according to claim 3, characterized in that, The second protrusion includes an inverted L-shaped structure (41) disposed opposite to the first neck surface (11), and the inverted L-shaped structure (41) and the first neck surface (11) form a receiving cavity communicating with the outside.

5. The dustproof device for the reducer oil seal according to claim 4, characterized in that, The second boss also includes a connection between the inverted L-shaped structure (41) and the third neck surface (43) via a second guide surface (42).

6. The dustproof device for the reducer oil seal according to claim 5, characterized in that, The bottom of the second boss is provided with a sealing groove (3), which is a frustum-shaped structure.

7. The dustproof device for the reducer oil seal according to claim 6, characterized in that, The inner cavity structure of the felt (6) is the same as that of the sealing groove (3).

8. The dustproof device for the reducer oil seal according to claim 7, characterized in that, The bottom of the felt (6) is attached to the transverse bearing surface (14) and covers the connection between the first guide surface (12) and the transverse bearing surface (14).

9. The dustproof device for the reducer oil seal according to claim 8, characterized in that, The second neck surface (13) and the third neck surface (43) form a channel structure (5), the channel structure (5) including a top narrow area (51) and a channel body (52) with a rectangular cross-section that coincides with the center of the floating oil seal (2).

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