Output shaft end sealing structure assembly, gearbox and operation machine

Abstract

The utility model relates to the technical field of engineering machinery, and discloses an output shaft end sealing structure assembly, a gearbox and operation machinery, and the output shaft end sealing structure assembly comprises an output shaft, a shell, an output flange, a rotary sealing piece and a dust cover. Wherein the dustproof cover is arranged at the joint of the output flange and the shell in a covering mode, at least one partition piece is arranged on the side, facing the rotary sealing piece, of the dustproof cover, and the partition piece extends in the axial direction of the output shaft so that the inner space of the dustproof cover can be divided into at least two independent cavities. The joint of the output flange and the shell is covered with the dustproof cover, the inner side of the dustproof cover is provided with the at least one partition piece, the inner space of the dustproof cover is divided into the at least two cavities in the radial direction, and therefore a labyrinth structure is formed, plastic isolation fine nets, fine sand, gravel and the like are not prone to entering the gap between the output flange and the shell, and the service life of the output flange is prolonged. Therefore, the rotary sealing element is effectively protected from being damaged, the service life of the rotary sealing element is prolonged, the maintenance cost is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to an output shaft end sealing structure assembly, a gearbox and an operating machine. Background Art

[0002] Construction machinery, such as wheeled excavators, are widely used in urban greening, drainage projects, and fruit plantations due to their excellent maneuverability. The transmission is a key component of a vehicle's powertrain, regulating power transfer between the engine and the wheels by changing the transmission ratio.

[0003] However, the applicant discovered that the sealing structure at the output end of the excavator gearbox had at least the following defects:

[0004] Since excavators often operate in harsh working conditions such as green areas equipped with plastic isolation mesh, muddy soil, deserts, etc., plastic isolation mesh, fine sand and gravel can easily enter the gap between the gearbox output flange and the housing, damaging the shaft end oil seal structure, resulting in frequent oil seal failures, affecting operating efficiency, and increasing maintenance costs. Utility Model Content

[0005] The utility model provides an output shaft end sealing structure assembly, a gearbox and an operating machine, so as to solve or improve the problem in the related art that plastic isolation fine mesh, fine sand and gravel, etc. are easy to enter the gap between the output end flange and the housing of the gearbox, damaging the shaft end oil seal structure, resulting in frequent seal failure, affecting operating efficiency and increasing maintenance costs.

[0006] In a first aspect, the present invention provides an output shaft end sealing structure assembly, comprising:

[0007] output shaft;

[0008] a housing, sleeved on the output shaft, the housing being rotatably connected to the output shaft;

[0009] An output flange is sleeved on the end of the output shaft, and the output flange rotates synchronously with the output shaft;

[0010] A rotary seal is sleeved on the output flange and is arranged between the output flange and the housing;

[0011] A dust cover is sleeved on the output flange, and the dust cover is arranged at the connection between the output flange and the shell. At least one barrier is provided on the side of the dust cover facing the rotary seal, and the barrier extends along the axial direction of the output shaft to divide the internal space of the dust cover into at least two independent cavities.

[0012] In an optional embodiment, the barrier is an annular barrier.

[0013] In an optional embodiment, the end surface of the shell facing the dust cover is provided with a first annular groove adapted to the annular barrier, the annular barrier is inserted into the first annular groove, and there is a gap between the annular barrier and the first annular groove.

[0014] In an optional embodiment, the dust cover includes:

[0015] The dust cover body is in a stepped structure, and the barrier is arranged on the step surface of the stepped structure;

[0016] a first annular flange, provided on a side of the dust cover body close to the output shaft, the first annular flange being sleeved on the output flange;

[0017] The second annular flange is arranged on a side of the dust cover body away from the output shaft, and the second annular flange is inserted into the shell.

[0018] In an optional embodiment, the end surface of the shell facing the dust cover is provided with a second annular groove adapted to the second annular flange, the second annular flange is inserted into the second annular groove, and there is a gap between the second annular flange and the second annular groove.

[0019] In an optional embodiment, the dust cover is interference-connected to the output flange.

[0020] In an optional embodiment, the dust cover is a metal dust cover.

[0021] In an optional embodiment, the surface of the dust cover is provided with an anti-rust layer.

[0022] In a second aspect, the present invention further provides a gearbox comprising the output shaft end sealing structure assembly as described in any one of the above items.

[0023] In a third aspect, the present invention further provides a working machine comprising the gearbox as described above.

[0024] The output shaft end sealing structure assembly provided by the utility model covers the connection between the output flange and the housing by a dust cover, and at least one partition is provided on the inner side of the dust cover, which radially divides the internal space of the dust cover into at least two cavities, thereby forming a labyrinth structure, making it difficult for plastic isolation fine mesh, fine sand and gravel, etc. to enter the gap between the output flange and the housing, thereby effectively protecting the rotating seal from damage, extending the service life of the rotating seal, reducing maintenance costs, and improving its working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a cross-sectional view of the output shaft end sealing structure assembly according to an embodiment of the present utility model;

[0027] Figure 2 for Figure 1 A partial enlarged schematic diagram of point A in the middle.

[0028] Description of reference numerals:

[0029] 1. Output shaft; 2. Housing; 201. First annular groove; 202. Second annular groove; 3. Output flange; 301. Flange shaft; 3011. Shaft shoulder; 302. Flange plate; 3021. Mounting hole; 4. Rotary seal; 5. Dust cover; 501. Blocking member; 502. Cavity; 503. Dust cover body; 5031. Step surface; 504. First annular flange; 505. Second annular flange; 6. Bearing; 7. Locking nut; 8. Sealing ring. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0031] The following combination Figures 1 to 2 , describing the output shaft end sealing structure assembly, gearbox and operating machinery of the embodiment of the present utility model.

[0032] According to an embodiment of the present invention, on the one hand, an output shaft end sealing structure assembly is provided, which is suitable for use in a gearbox, including an output shaft 1, a housing 2, an output flange 3, a rotary seal 4, and a dust cover 5. Specifically, as Figure 1 As shown, the housing 2 is sleeved on the output shaft 1, and the housing 2 is rotatably connected to the output shaft 1. Specifically, the output shaft 1 is rotatably connected to the housing 2 through a bearing 6, so that the output shaft 1 can rotate relative to the housing 2.

[0033] The output flange 3 is sleeved on the end of the output shaft 1, and the output flange 3 rotates synchronously with the output shaft 1. Specifically, Figure 1 As shown, the output flange 3 includes a flange shaft 301 and a flange plate 302 connected to each other, and the flange shaft 301 and the flange plate 302 are machined and formed as one piece. The flange shaft 301 is sleeved on the end of the output shaft 1, and the flange shaft 301 and the output shaft 1 are connected by a key so that the output flange 3 and the output shaft 1 rotate together, thereby outputting power outward. The flange plate 302 is provided with a plurality of mounting holes 3021 for connecting an external power actuator. A locking nut 7 is installed at the stop position of the output flange 3, and the locking nut 7 is threadedly connected to the output shaft 1 to fix the shaft end of the output flange 3. In addition, on the side of the locking nut 7 facing the dust cover 5, a sealing ring 8 is provided between the flange shaft 301 and the output shaft 1. The sealing ring 8 can be an O-ring, etc., to seal the connection between the output flange 3 and the output shaft 1.

[0034] like Figure 1 As shown, the rotary seal 4 is sleeved on the output flange 3 and is arranged between the output flange 3 and the housing 2. Specifically, the rotary seal 4 can be a skeleton oil seal, which is sleeved on the flange shaft 301. The dust cover 5 is sleeved on the output flange 3 and is arranged at the connection between the output flange 3 and the housing 2 to protect the oil seal position. Figure 2 As shown, at least one baffle 501 is provided on the side of the dust cover 5 facing the rotary seal 4. The baffle 501 extends along the axial direction of the output shaft 1 to divide the internal space of the dust cover 5 into at least two independent cavities 502. Figure 1 As for the placement position of the output shaft end sealing structure assembly shown in the figure, the direction indicated by the solid arrow in the figure is the axial direction of the output shaft 1, and the direction indicated by the hollow arrow in the figure is the radial direction of the output shaft 1.

[0035] In this way, the dust cover 5 covers the connection between the output flange 3 and the shell 2, and at least one partition 501 is provided on the inner side of the dust cover 5, so that the internal space of the dust cover 5 is radially divided into at least two cavities 502, thereby forming a labyrinth sealing cavity structure, so that plastic isolation fine mesh, fine sand and gravel, etc. are not easy to enter the gap between the output flange 3 and the shell 2, thereby effectively preventing the invasion of impurities such as plastic isolation mesh, muddy water and fine sand, protecting the rotating seal 4 from damage, extending the service life of the rotating seal 4, reducing maintenance costs, and improving its work efficiency. It is suitable for urban green areas equipped with plastic isolation fine mesh, muddy soil ground, desert operations and other working conditions.

[0036] In some embodiments of the present invention, the barrier 501 is an annular barrier. This configuration forms a continuous, closed ring around the central axis of the output shaft 1, further enhancing the sealing effect. It should be noted that the number of barrier members 501 can be determined based on actual design requirements, with multiple barrier members 501 spaced radially along the output shaft 1. Alternatively, in other embodiments, the barrier 501 comprises multiple arcuate baffles located on the same circumference, evenly spaced along the circumference of the output shaft 1.

[0037] In some embodiments of the present invention, see Figure 1 and Figure 2 As shown, the end surface of the housing 2 facing the dust cover 5 is provided with a first annular groove 201 that mates with the annular barrier. The annular barrier is inserted into the first annular groove 201, with a gap between the annular barrier and the first annular groove 201. This arrangement allows the annular barrier to cooperate more closely with the first annular groove 201, further extending the sealing path and preventing impurities from reaching the rotating seal 4. Furthermore, the gap between the annular barrier and the wall of the first annular groove 201 reduces frictional contact between the two, ensuring smooth and flexible rotation.

[0038] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the dust cover 5 includes a dust cover body 503, a first annular flange 504 and a second annular flange 505. Specifically, as shown in FIG. Figure 2 As shown, the dust cover body 503 is a stepped structure, and the barrier 501 is arranged on the step surface 5031 of the stepped structure. The first annular flange 504 is arranged on the side of the dust cover body 503 close to the output shaft 1, and the first annular flange 504 is sleeved on the output flange 3. The second annular flange 505 is arranged on the side of the dust cover body 503 away from the output shaft 1, and the second annular flange 505 is inserted into the shell 2. Such a setting helps to enhance the strength and stability of the dust cover 5, enhance the protection ability of the dust cover 5, and effectively prevent impurities from entering. It is suitable for road-type engineering vehicle gearboxes with better working conditions, as well as other engineering machinery and agricultural machinery gearboxes with relatively poor working conditions, and has strong versatility. In addition, as Figure 1 As shown, the dust cover 5 is installed outside the housing 2, does not occupy a large space between the housing 2 and the output flange 3, has a compact structure, and is easy to assemble.

[0039] In some embodiments of the present invention, see Figure 1 and Figure 2As shown, the end surface of the housing 2 facing the dust cover 5 is provided with a second annular groove 202 that is compatible with the second annular flange 505. The second annular flange 505 is inserted into the second annular groove 202, and a gap is provided between the second annular flange 505 and the second annular groove 202. This arrangement allows the edge of the dust cover 5 to be plugged into and fit with the housing 2, making the two fit more tightly and further extending the sealing path, making it difficult for impurities to reach the rotating seal 4. At the same time, a gap is provided between the second annular flange 505 and the wall surface of the second annular groove 202, which can reduce frictional contact between the two and ensure flexible and smooth rotation. In addition, in this embodiment, the first annular groove 201 and the second annular groove 202 are concentric annular grooves.

[0040] In some embodiments of the present invention, the dust cover 5 is interference-connected with the output flange 3. Figure 2 As shown, flange shaft 301 is provided with a shaft shoulder 3011, to which dust cover 5 is interference-connected. This arrangement creates an interference fit between dust cover 5 and output flange 3, allowing dust cover 5 to reliably rotate with output flange 3 during operation. Furthermore, when replacing rotary seal 4, dust cover 5 can be removed and installed along with output flange 3, making operation convenient.

[0041] In some embodiments of the present invention, the dust cover 5 is a metal dust cover, specifically a thin-walled metal part. This configuration provides the metal dust cover with high strength and durability, enabling extended use in harsh working environments, effectively protecting the rotating seal 4, and being easy to shape and process to meet the design requirements of various application scenarios.

[0042] In some embodiments of the present invention, the surface of the dust cover 5 is provided with a rust-proof layer. This provides an additional layer of protection, enhancing the overall durability of the dust cover 5, extending its service life and maintaining its neat appearance. This helps reduce downtime and maintenance costs, thereby improving the overall economic efficiency of the equipment. Furthermore, the dust cover 5 can be treated with rust-proofing alone or together with the output flange 3.

[0043] According to an embodiment of the present invention, another aspect of the present invention is a gearbox suitable for use in construction machinery such as wheeled excavators, including an output shaft end seal structure assembly as described in the various embodiments described above. In this configuration, a dust cover 5 covers the connection between the output flange 3 and the housing 2, and at least one baffle 501 is provided inside the dust cover 5, radially dividing the interior space of the dust cover 5 into at least two cavities 502. This creates a labyrinthine seal cavity structure at the output shaft end of the gearbox, making it difficult for plastic isolation mesh, fine sand and gravel, and the like to enter the gap between the output flange 3 and the housing 2. This effectively prevents the intrusion of impurities such as the plastic isolation mesh, muddy water, and fine sand, protecting the rotary seal 4 from damage, extending the service life of the rotary seal 4, reducing maintenance costs, and improving its operating efficiency. The gearbox is suitable for use in urban green areas equipped with plastic isolation mesh, muddy soil surfaces, desert operations, and other working conditions. The derivation process for this beneficial effect is roughly similar to the derivation process for the beneficial effect of the output shaft end seal structure assembly described above, and will not be repeated here.

[0044] According to another embodiment of the present invention, a working machine is provided. It is understood that the working machine includes, but is not limited to, excavators, loaders, cranes, and the like. Specifically, a wheeled excavator is used as an example to illustrate this embodiment. The working machine includes a gearbox as described in the above embodiment. In this configuration, a dust cover 5 covers the connection between the output flange 3 and the housing 2, and at least one baffle 501 is provided inside the dust cover 5, radially dividing the interior space of the dust cover 5 into at least two cavities 502. This forms a labyrinthine sealing cavity structure at the output shaft end of the gearbox. This prevents plastic isolation mesh, fine sand and gravel, and other impurities from entering the gap between the output flange 3 and the housing 2, thereby effectively preventing the intrusion of impurities such as the plastic isolation mesh, muddy water, and fine sand, protecting the rotary seal 4 from damage, extending the service life of the rotary seal 4, reducing maintenance costs, and improving its operating efficiency. The gearbox is suitable for use in urban green areas equipped with plastic isolation mesh, muddy soil surfaces, desert operations, and other working conditions. The derivation process of this beneficial effect is generally similar to the derivation process of the beneficial effect of the above-mentioned gearbox, and will not be repeated here.

[0045] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. An output shaft end sealing structure assembly, characterized in that: include: Output shaft (1); A housing (2) is sleeved on the output shaft (1), and the housing (2) is rotatably connected to the output shaft (1); An output flange (3) is sleeved on the end of the output shaft (1), and the output flange (3) rotates synchronously with the output shaft (1); A rotary seal (4) is sleeved on the output flange (3), and the rotary seal (4) is arranged between the output flange (3) and the housing (2); A dust cover (5) is sleeved on the output flange (3), and the dust cover (5) is arranged at the connection between the output flange (3) and the housing (2). The dust cover (5) is provided with at least one baffle (501) on the side facing the rotary seal (4), and the baffle (501) extends along the axial direction of the output shaft (1) to divide the internal space of the dust cover (5) into at least two independent cavities (502).

2. The output shaft end sealing structure assembly according to claim 1, characterized in that: The barrier (501) is an annular barrier.

3. The output shaft end sealing structure assembly according to claim 2, characterized in that: The end surface of the shell (2) facing the dust cover (5) is provided with a first annular groove (201) adapted to the annular barrier; the annular barrier is inserted into the first annular groove (201); and a gap is provided between the annular barrier and the first annular groove (201).

4. The output shaft end sealing structure assembly according to claim 1, characterized in that: The dust cover (5) comprises: The dust cover body (503) is in a stepped structure, and the barrier member (501) is arranged on a step surface (5031) of the stepped structure; A first annular flange (504) is provided on a side of the dust cover body (503) close to the output shaft (1), and the first annular flange (504) is sleeved on the output flange (3); A second annular flange (505) is provided on a side of the dust cover body (503) away from the output shaft (1), and the second annular flange (505) is inserted into the housing (2).

5. The output shaft end sealing structure assembly according to claim 4, characterized in that: The end surface of the shell (2) facing the dust cover (5) is provided with a second annular groove (202) adapted to the second annular flange (505); the second annular flange (505) is inserted into the second annular groove (202); and a gap is provided between the second annular flange (505) and the second annular groove (202).

6. The output shaft end sealing structure assembly according to any one of claims 1 to 5, characterized in that: The dust cover (5) is interference-connected with the output flange (3).

7. The output shaft end sealing structure assembly according to any one of claims 1 to 5, characterized in that: The dust cover (5) is a metal dust cover.

8. The output shaft end sealing structure assembly according to claim 7, characterized in that: The surface of the dust cover (5) is provided with an anti-rust layer.

9. A gearbox, characterized in that: The invention comprises an output shaft end sealing structure assembly according to any one of claims 1 to 8.

10. A working machine, characterized in that: Comprising a gearbox as claimed in claim 9.

Images