High-efficiency muddy water sealing type medium-reduction input end sealing structure assembly

Abstract

The utility model discloses an efficient muddy water sealing type middle reduction input end sealing structure assembly which is characterized in that the efficient muddy water sealing type middle reduction input end sealing structure assembly is composed of an oil seal, a flange, a dust blocking disc, an adjusting ring, an O-shaped ring, a cylindrical gear shell, an input shaft, a bearing and a flange nut, and the oil seal is provided with an outer diameter fixing face, a main lip opening, a first auxiliary lip opening, a second auxiliary lip opening and a long auxiliary lip opening. A long auxiliary lip matching surface and an outer circular surface are arranged on the dust blocking disc; the main lip of the oil seal is provided with an oil return line, the oil sealing capacity is greatly improved, the dust sealing capacity is improved through the design that three ribs of the second auxiliary lip are spaced by two grooves, and the problem of vacuum pumping is solved. The dust blocking disc is additionally arranged, and a small gap structure is designed between the dust blocking disc and the adjusting ring, so that invasion of large dust and mud can be obviously blocked; the long auxiliary lip of the oil seal is in lap joint with the dust blocking disc, the dust sealing capacity and the muddy water sealing capacity can be directly improved, and a new thought and an effective solution scheme are provided for arrangement of a mine truck bridge middle subtraction input end sealing structure.

Description

Technical Field

[0001] The utility model relates to the technical field of mining truck axles, in particular to a high-efficiency mud-water-sealing type center-reducing input end sealing structure assembly. Background Art

[0002] Oil seals are made of rubber and metal frames, which are fragile and delicate. They are easily damaged in production and assembly, normal use, and after-sales maintenance. Oil seals are vulnerable parts, but they are an indispensable and important part of the axle assembly. The failure of oil seals will directly lead to oil leakage, causing the vehicle to stop operating and seriously affecting the normal operation of the vehicle.

[0003] Compared with heavy truck axles, mining truck axles are used in a more severe environment. In particular, some mining trucks are used in tropical rainforest climate areas, which puts higher requirements on the sealing performance of mining truck axle oil seals, especially on the sealing performance of mud and water.

[0004] The sealing structure of the input end of the traditional mining truck bridge is usually completely borrowed from the sealing structure of the input end of the heavy truck bridge. Due to the narrow space between the flange and the adjustment ring, it is difficult to set the dust shield, resulting in obvious insufficient dust and mud and water sealing capabilities; the oil seal is also usually only provided with a main lip and a secondary lip, the main lip is used to seal the oil, and the secondary lip is used to seal the dust. If the main lip is not provided with an oil return line, the oil sealing capacity is insufficient. If an oil return line is provided, the continuous pumping of the oil return line often forms a vacuum between the main and secondary lips, resulting in leakage problems, which is a dilemma; the dust-proof ability of the only ordinary secondary lip is really limited, and it is even more helpless when facing harsh working conditions such as mud and water; the outer diameter of the oil seal is designed as a completely exposed skeleton structure, which has a poor ability to fill the defects of the shell and is prone to oil leakage problems, while some designs are designed as a completely external rubber-encapsulated structure, but there is a risk of assembly rebound. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a high-efficiency mud-sealing water-type center-reducing input end sealing structure assembly.

[0006] The technical solution provided by the utility model is: a high-efficiency mud-sealing water-type center-reducing input end sealing structure assembly, which is special in that it consists of an oil seal, a flange, a dust shield, an adjustment ring, an O-ring, a cylindrical gear housing, an input shaft, a bearing and a flange nut; the bearing consists of a bearing outer ring and a bearing inner ring, the bearing inner ring rotates freely on the bearing outer ring, wherein the outer diameter of the bearing outer ring is the same as the inner diameter of the bearing mounting position of the cylindrical gear housing, the bearing outer ring of the bearing is fixedly mounted on the cylindrical gear housing, the inner diameter of the bearing inner ring is the same as the outer diameter of the bearing mounting position of the input shaft, the bearing inner ring of the bearing is fixedly mounted on the input shaft through the shaft shoulder limiter of the input shaft, and the input shaft rotates freely on the cylindrical gear housing; the inner diameter of the flange is the same as the outer diameter of the flange mounting position of the input shaft, the two are radially fixed, the lower end face of the flange is parallel to the upper end face of the bearing inner ring of the bearing, and the two are pressed against each other The inner diameter of the dust shield plate is the same as the outer diameter of the dust shield plate installation position of the flange, and the two are fixed together; the inner diameter of the flange nut is the same as the outer diameter of the nut locking position of the input shaft, the two are connected, and are fixed together by the flange nut and the parallel end faces of the flange against the limit position; the outer diameter of the adjusting ring is the same as the inner diameter of the adjusting ring installation position of the cylindrical gear case, the two are connected, and are fixed together by the parallel end faces of the adjusting ring and the bearing outer ring of the bearing against the limit position; the inner and outer diameters and cross-sectional radii of the O-ring are the same as the inner and outer diameters and cross-sectional dimensions of the neutral gear clamped by the cylindrical gear case and the adjusting ring, and the O-ring is assembled and fixed in the gap formed by the cylindrical gear case and the adjusting ring; the oil seal is installed on the adjusting ring, and the oil seal and the flange form a friction seal; the flange carries the input shaft to rotate freely on the cylindrical gear case through the bearing; the oil seal and the O-ring realize the sealing between the inner and outer cavities.

[0007] Furthermore, the oil seal is provided with an outer diameter fixing surface, a main lip, a first auxiliary lip, a second auxiliary lip and a long auxiliary lip; the outer diameter of the outer diameter fixing surface is the same as the inner diameter of the oil seal mounting position of the adjusting ring, and the two are fixed together; the inner diameters of the main lip, the first auxiliary lip and the second auxiliary lip are the same as the outer diameter of the flange oil seal mating surface, the main lip, the first auxiliary lip and the second auxiliary lip overlap on the oil seal mating surface to form a friction seal with the flange, and there is a right-handed oil return line on the main lip; a long auxiliary lip mating surface is provided on the dust shield plate; the long auxiliary lip overlaps on it to form a friction seal with the dust shield plate.

[0008] Furthermore, the second auxiliary lip has three ribs and a groove structure is provided between two adjacent ribs.

[0009] Furthermore, the dust shielding plate is provided with an outer cylindrical surface, and a gap of 0.5 mm is formed between the outer cylindrical surface and the inner hole of the adjusting ring.

[0010] Furthermore, the outer diameter fixing surface on the oil seal is a semi-rubber-encapsulated structure.

[0011] The beneficial effects of the utility model are:

[0012] 1. The main lip of the oil seal is equipped with a right-hand oil return line, which greatly improves the oil sealing ability. The unique design of the second auxiliary lip with three ribs and two grooves not only improves the dust sealing ability, but also avoids the formation of vacuum between the main and auxiliary lips caused by pump suction;

[0013] 2. The setting of the first auxiliary lip of the oil seal allows grease to be added in advance between the main lip and the second auxiliary lip for lubrication. The radial force of the lip is small, the wear is light, and the service life is long; it effectively solves the problem of dry friction and short service life of the auxiliary lip of the traditional structure;

[0014] 3. The addition of a dust shield and a small gap between the dust shield and the adjustment ring can significantly block the invasion of large dust and mud;

[0015] 4. The long auxiliary lip of the oil seal overlaps with the dust shield plate, which can directly improve the ability to seal dust, mud and water;

[0016] 5. The design of the semi-rubber-encapsulated structure of the outer diameter of the oil seal combines the advantages of the two outer diameter designs of full rubber encapsulation and full skeleton. While ensuring sealing, it also avoids assembly rebound. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 yes Figure 1 A magnified view of part I.

[0019] In the figure, 1, oil seal, 2, flange, 3, dust shield plate, 4, adjusting ring, 5, O-ring, 6, cylindrical gear housing, 7, input shaft, 8, bearing, 9, flange nut, 11, outer diameter fixing surface, 12, main lip, 13, first auxiliary lip, 14, second auxiliary lip, 15, long auxiliary lip, 31, long auxiliary lip mating surface, 32, outer cylindrical surface. DETAILED DESCRIPTION

[0020] For better understanding and implementation, the present invention is described in detail with reference to the accompanying drawings. The embodiments are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0021] like Figure 1As shown, a high-efficiency mud-sealing water-type center-reducing input end sealing structure assembly is composed of an oil seal 1, a flange 2, a dust plate 3, an adjusting ring 4, an O-ring 5, a cylindrical gear housing 6, an input shaft 7, a bearing 8 and a flange nut 9, wherein the oil seal 1 is processed with an outer diameter fixing surface 11, a main lip 12, a first auxiliary lip 13, a second auxiliary lip 14 and a long auxiliary lip 15; the outer diameter fixing surface 11 is processed into a semi-rubber-encapsulated structure (half rubber and half metal skeleton), and its size is the same as the inner diameter of the oil seal installation position of the adjusting ring 4, and the two are assembled and fixed together; the second auxiliary lip 14 is processed into a structure with three ribs and a groove is set between two adjacent ribs The inner diameters of the main lip 12, the first auxiliary lip 13 and the second auxiliary lip 14 are the same as the outer diameter of the oil seal mating surface of the flange 2. These three lips are placed on the mating surface of the oil seal 1. When the flange 2 rotates with the input shaft 7, the three lips do not move and are always placed on the mating surface of the oil seal 1 to form a friction seal with the flange 2. The main lip 12 is processed with a right-hand oil return line; the bearing 8 is composed of a bearing outer ring and a bearing inner ring. The bearing inner ring can rotate freely on the bearing outer ring. The outer diameter of the bearing outer ring is processed to be the same as the inner diameter of the bearing mounting position of the cylindrical gear housing 6, and is installed and fixed on the cylindrical gear housing 6. The inner diameter of the bearing inner ring is processed to be the same as the inner diameter of the input shaft The outer diameter of the bearing mounting position of the input shaft 7 is the same, and it is fixed on the input shaft 7 through the shoulder limit installation of the input shaft 7, realizing the free rotation of the input shaft 7 on the cylindrical gear housing 6; the inner diameter of the flange 2 is the same as the outer diameter of the flange mounting position of the input shaft 7, and the two are radially fixed through spline matching, and the lower end face of the flange 2 is parallel to the upper end face of the bearing inner ring of the bearing 8, and the two are pressed together, which adds axial limitation to the flange 2 on the input shaft 7; the inner diameter of the dust shield plate 3 is the same as the outer diameter of the dust shield plate mounting position of the flange 2, and the two are assembled and spot welded together; a long auxiliary lip mating surface 31 and an outer cylindrical surface 32 are processed on the dust shield plate 3, and the long auxiliary The lip 1 overlaps the long auxiliary lip mating surface 31, and the outer cylindrical surface 32 forms a gap of 0.5mm with the inner hole of the adjusting ring 4; the inner diameter of the flange nut 9 is the same as the outer diameter of the nut locking position of the input shaft 7, and the two are connected by threads and fixed together by the parallel end faces of the flange nut 9 and the flange 2; the outer diameter of the adjusting ring 4 is the same as the inner diameter of the cylindrical gear housing 6 adjusting ring installation position, and the two are connected by threads and fixed together by the parallel end faces of the adjusting ring 4 and the bearing outer ring of the bearing 8. The advancing and retreating of the adjusting ring 4 through the threaded connection can realize the advancing and retreating adjustment of the bearing outer ring of the bearing 8, thereby realizing the bearing clearance adjustment function; The inner and outer diameters and cross-sectional radius of the O-ring 5 are the same as the inner and outer diameters and cross-sectional dimensions of the neutral space sandwiched by the cylindrical gear housing 6 and the adjusting ring 4. The O-ring 5 is assembled and fixed in the gap formed by the two, thereby realizing the static sealing function between the cylindrical gear housing 6 and the adjusting ring 4; the oil seal 1 is installed on the adjusting ring 4, and the oil seal 1 forms a friction seal with the flange 2; at this point, the flange 2 is connected with the input shaft 7 to rotate freely on the cylindrical gear housing 6 through the bearing 8, and the existence of the oil seal 1 and the O-ring 5 realizes the sealing function between the inner and outer cavities.

[0022] The utility model discloses a high-efficiency mud-water-sealed mid-axle main reducer input end sealing structure assembly. When working, firstly, the oil seal 1 is assembled and pressed into the inner hole of the adjusting ring 4, so that the two maintain a specific position relationship in the axial direction, and the outer diameter fixing surface 11 of the oil seal 1 just forms a sealing match with the inner hole of the adjusting ring 4, and then the O-ring 5 is assembled into the outer diameter groove of the adjusting ring 4, so that an assembly of an adjusting ring with an oil seal and an O-ring is formed, which is reserved for standby use; after the bearing 8 is assembled to the bearing installation position of the input shaft 7, the input shaft assembly is then installed in the inner cavity of the mid-axle main reducer formed by assembling the cylindrical gear housing 6 and the reducer housing, and there is a piece in the cavity to align the input shaft 7 The outer diameter of the outer ring of the bearing 8 is exactly matched with the inner diameter of the bearing seat of the cylindrical gear housing 6; at this time, the previously prepared adjusting ring assembly is installed on the cylindrical gear housing 6 through threaded connection, and the lower end face of the adjusting ring 4 is in close contact with the end face of the outer ring of the bearing 8. The bearing clearance of the bearing 8 can be adjusted by adjusting the axial position of the adjusting ring 4. At this moment, the O-ring 5 is squeezed between the groove formed by the cylindrical gear housing 6 and the adjusting ring 4 to play a static sealing role; then, the flange 2 is installed on the input shaft 7 through a spline connection, and then the axial limit is fixed by the inner ring of the bearing 8, and the oil seal matching surface of the flange 2 is exactly The flange nut 9 is installed on the input shaft 7 through a threaded connection, and the lower end face is fitted with the flange 2, and finally the nut is locked, so that the assembly of the entire assembly is completed; during operation, the flange 2 drives the entire input shaft assembly to rotate and transmit torque. Due to the need for lubrication of bearings, gears, etc., a certain amount of lubricating oil is added to the inner cavity of the main reducer, and because the outer diameter fixing surface 1 of the oil seal 1 Due to the sealing relationship formed by the main lip 1 and the main lip 12 with the adjusting ring 4 and the flange 2 respectively, and the sealing effect formed by the O-ring 5 between the cylindrical gear housing 6 and the adjusting ring 4, the lubricating oil in the main reducer cavity cannot leak at all; similarly, the dust shield plate 3 rotates with the flange 2, and since there is only a small gap between the dust shield plate 3 and the adjusting ring 4, large muddy water and dust are blocked from the outside and cannot enter. Since the long auxiliary lip 15 is overlapped with the dust shield plate 3, small dust and muddy water that have passed the first layer of protection will be blocked here, and there is another dustproof lip 14 further inside, which realizes its functions of sealing oil, dust and muddy water.

[0023] It should be understood that the technical features not elaborated in this specification belong to the prior art. Although the implementation methods of the utility model patent are described above in conjunction with the drawings, the utility model is not limited to the above specific implementation methods, which are only illustrative and not restrictive. Ordinary technicians in this field can make more forms under the enlightenment of the utility model without departing from the scope of protection of the purpose of the utility model and the claims, which are all within the protection scope of the utility model.

Claims

1. A high-efficiency mud-sealing water-type center-reducing input end sealing structure assembly, characterized in that: The invention comprises an oil seal (1), a flange (2), a dust shield (3), an adjustment ring (4), an O-ring (5), a cylindrical gear housing (6), an input shaft (7), a bearing (8) and a flange nut (9); the bearing (8) comprises a bearing outer ring and a bearing inner ring, the bearing inner ring rotates freely on the bearing outer ring, wherein the outer diameter of the bearing outer ring is the same as the inner diameter of the bearing mounting position of the cylindrical gear housing (6), the bearing outer ring of the bearing (8) is fixedly mounted on the cylindrical gear housing (6), and the inner diameter of the bearing inner ring is the same as the inner diameter of the input shaft. The outer diameter of the bearing mounting position of the input shaft (7) is the same as that of the bearing inner ring of the bearing (8), the bearing inner ring of the bearing (8) is fixed on the input shaft (7) through the shaft shoulder limit installation of the input shaft (7), and the input shaft (7) rotates freely on the cylindrical gear housing (6); the inner diameter of the flange (2) is the same as the outer diameter of the flange mounting position of the input shaft (7), the two are radially fixed, the lower end face of the flange (2) is parallel to the upper end face of the bearing inner ring of the bearing (8), and the two are pressed against each other; the inner diameter of the dust plate (3) is the same as the outer diameter of the dust plate mounting position of the flange (2). The outer diameters of the flange nut (9) and the nut locking position of the input shaft (7) are the same, and the two are fixed together; the inner diameter of the flange nut (9) is the same as the outer diameter of the nut locking position of the input shaft (7), and the two are connected and fixed together by the flange nut (9) and the parallel end surface of the flange (2); the outer diameter of the adjustment ring (4) is the same as the inner diameter of the adjustment ring installation position of the cylindrical gear housing (6), and the two are connected and fixed together by the adjustment ring (4) and the parallel end surface of the bearing outer ring of the bearing (8); the inner and outer diameters and cross-sectional area of ​​the O-ring (5) are the same. The surface radius is the same as the inner and outer diameters and cross-sectional dimensions of the neutral gear sandwiched between the cylindrical gear housing (6) and the adjusting ring (4); the O-ring (5) is assembled and fixed in the gap formed by the cylindrical gear housing (6) and the adjusting ring (4); the oil seal (1) is installed on the adjusting ring (4), and the oil seal (1) and the flange (2) form a friction seal; the flange (2) carries the input shaft (7) through the bearing (8) to rotate freely on the cylindrical gear housing (6); the oil seal (1) and the O-ring (5) realize the sealing between the inner and outer cavities.

2. According to claim 1, a high-efficiency mud-sealing water-type center-reducing input end sealing structure assembly is characterized in that: The oil seal (1) is provided with an outer diameter fixing surface (11), a main lip (12), a first auxiliary lip (13), a second auxiliary lip (14) and a long auxiliary lip (15); the outer diameter of the outer diameter fixing surface (11) is the same as the inner diameter of the oil seal mounting position of the adjustment ring (4), and the two are fixed together; the inner diameters of the main lip (12), the first auxiliary lip (13) and the second auxiliary lip (14) are the same as the outer diameter of the oil seal matching surface of the flange (2); the main lip (12), the first auxiliary lip (13) and the second auxiliary lip (14) are overlapped on the oil seal matching surface to form a friction seal with the flange (2); and a right-handed oil return line is provided on the main lip (12); the dust shield plate (3) is provided with a long auxiliary lip matching surface (31); the long auxiliary lip (15) is overlapped on the long auxiliary lip matching surface (31) to form a friction seal with the dust shield plate (3).

3. According to claim 2, a high-efficiency mud-sealing water-type center-reducing input end sealing structure assembly is characterized in that: The second auxiliary lip (14) has three ribs and a groove structure is provided between two adjacent ribs.

4. The high-efficiency mud-sealing water-type center-reducing input end sealing structure assembly according to claim 1 is characterized in that: The dust shield plate (3) is provided with an outer cylindrical surface (32), and a gap of 0.5 mm is formed between the outer cylindrical surface (32) and the inner hole of the adjustment ring (4).

5. The high-efficiency mud-sealing water-type center-reducing input end sealing structure assembly according to claim 1 is characterized in that: The outer diameter fixing surface (11) on the oil seal (1) is a semi-rubber-encapsulated structure.

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