CN216734298U

CN216734298U - Waterproof axle box device

Info

Publication number: CN216734298U
Application number: CN202220006822.0U
Authority: CN
Inventors: 曾伟; 陶功安; 贺世忠; 肖泽桦; 李鸿浩
Original assignee: CRRC Zhuzhou Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-06-14
Anticipated expiration: 2032-01-04

Abstract

The utility model discloses a waterproof axle box device which comprises an inner end cover, an axle box body, a bearing, an outer end cover, axle end equipment and a sealing assembly, wherein the outer end cover is provided with a threaded hole, the axle end equipment is fixed with the threaded hole through a fastener, the sealing assembly comprises an adjusting gasket arranged at the contact position of the inner end cover and the axle box body, and the threaded hole is a blind hole. The axle box integral axial clearance adjustable structure greatly improves the waterproof sealing performance of the bogie axle box device. The outer end cover is designed into a waterproof and drainage combined outer end cover, a light contact type axle box bearing is adopted, and a water throwing structure is designed on the inner side of the axle box.

Description

Waterproof axle box device

Technical Field

The utility model relates to a waterproof axle box device, belongs to the technical field of axle boxes, and is widely applied to a bogie of a locomotive, a motor train unit, a subway, a light rail and other standard rail transit vehicles.

Background

The axle box device is widely applied to various railway freight cars, passenger cars, motor train units, subways and other vehicles at home and abroad. On the railway locomotive and the vehicle, a bogie and a framework are connected on a shaft neck in a sleeved mode; the main function of the device is to transfer the weight and load of the vehicle body to the wheel set, lubricate the shaft neck, reduce friction and running resistance, and realize the transition from rotation to translation of the vehicle.

The problem that the axle box device is troubled by water inflow is always a problem in the mechanical industry, and the water inflow can cause the faults of rusting inside the axle box, bearing failure and the like. Therefore, it has been a long-term work in the mechanical industry to develop an axle box device having high water resistance by improving the water resistance of the axle box device.

The conventional axle box device has the following problems: (1) as external equipment such as a grounding device, a speed sensor and the like needs to be installed in the axle box device for rail transit, a threaded hole needs to be formed in an outer end cover for fixing, the existing axle box device is provided with a threaded through hole, and water vapor enters through the threaded through hole to cause sealing failure; (2) the axle box device has the defects that the matching of the inner end cover and the outer end cover is not tight, the assembly process cannot be adjusted and the sealing is defective due to machining errors and a gap between the end cover and the axle box body, which is formed by uneven bearing of the axle box body and the end cover; (3) the outer end cover of the axle box is sealed by a rubber sealing gasket, and water vapor enters the axle box device in the application process due to the aging of a rubber piece, so that the sealing failure of the axle box device often occurs; (4) the inner cavity is of a fully-closed structure, and even if water is obviously fed in, the water cannot be discharged, so that the inner part of the axle box fails.

In the patent publication No. CN205396113U, a drainage device is added outside the outer cover, and the drainage device is a drainage valve installed at the drainage hole and axially movable along the drainage hole. The patent with the publication number of CN108131397A discloses a light contact type seal for a high-speed motor train unit axle box bearing, an outer framework, a seal lip at the upper part of a seal ring, the inner diameter of the seal ring and an inner retainer ring respectively form clearance fit with an outer retainer ring, a certain sealing effect is achieved, no contact friction is generated, the seal lip at the lower part of the seal ring is in light contact with the outer retainer ring, the contact pressure of two sealing surfaces is very small, a good sealing effect and small friction are achieved, and the advantages of contact type seal and non-contact type are achieved. The outermost end of the axle box end cover in the patent publication No. CN205872080U is provided with an outer end face, one side of the outer end face close to the axle box body is provided with a plurality of cast bosses, and the outer end face is provided with a plurality of axle end equipment mounting holes extending to the cast bosses, so that the waterproof performance is strong.

The above patent adopts single technical means, and the waterproof performance that promotes is limited, consequently needs to synthesize the whole waterproof, the drainage performance of jackbox device and adjusts urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that in order to overcome the defects in the prior art, the waterproof axle box device is provided, the sealing performance of the axle box device is improved, and the problem that the water inlet of the axle box device is invalid for a long time is solved.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

the utility model provides a waterproof axle box device, includes interior end cover, axle box, bearing, outer end cover, axle head equipment and seal assembly, be equipped with the screw hole on the outer end cover, axle head equipment pass through the fastener with the screw hole is fixed, seal assembly including set up in interior end cover with the adjusting shim of the contact position of axle box, the screw hole is the blind hole, the mounting hole has been seted up to outer end cover lower part, install the drainage check valve in the mounting hole.

According to the utility model, the threaded hole is set to be a blind hole structure, so that water vapor is prevented from entering through the threaded hole. An adjusting gasket is additionally arranged between the inner end cover and the shaft box body, so that the gap is compensated, and the sealing performance is improved. The single-phase drain valve is arranged inside the water tank, so that the valve can be quickly opened even if water exists, and the water is drained.

Further, in order to improve the external sealing performance, seal assembly still includes rubber packing pad, rubber packing pad seal install in the axle box with the binding face of outer end cover, and the coating of binding face periphery has sealed glue. The binding surface refers to the position where the axle box body is contacted with the outer end cover.

Further, in order to improve the sealing performance and reduce the occurrence of grease leakage, the bearing is a light contact bearing.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model has the functions of external prevention, intermediate repair and internal drainage, and the external part adopts the double protection of a waterproof end cover, a rubber sealing gasket and a sealant; the middle of the adjusting pad is provided with an adjusting pad for correcting the processing error and the component micro-motion of external equipment; the single-phase drain valve is arranged inside the water tank, so that the valve can be quickly opened even if water exists, and the water is drained. The problem of axle box device water inlet inefficacy has been solved for a long time.

The axle box integral axial clearance adjustable structure greatly improves the waterproof sealing performance of the bogie axle box device. The outer end cover is designed into an outer end cover combining water prevention and drainage, a light contact type axle box bearing is adopted, and a water throwing structure is designed on the inner side of the axle box; the method specifically comprises the following advantages:

1) the outer end cover adopts a blind hole structure, so that a threaded connecting hole of water shaft end equipment is prevented from entering, and the sealing performance of the axle box device is improved.

2) The gap between the axle box bodies formed by machining errors and uneven bearing of the end cover bolts of the axle box device component can be compensated, and the sealing performance is improved.

3) And a sealing glue is added between the outer end cover and the shaft box body on the basis of the sealing gasket, so that the sealing property is improved.

4) The light contact bearing is adopted, so that the bearing not only has a good sealing effect, but also has strong heat dissipation capacity.

5) The lower part of the outer end cover is provided with a drainage one-way valve, so that drainage operation can be carried out, and the operability of water inlet of the axle box device is improved.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

FIG. 2 is an assembly diagram according to an embodiment of the present invention.

The automobile axle comprises an axle (1), wheels (2), an inner end cover (3), an adjusting gasket (4), an axle box body (5), a light contact type bearing (6), a rubber sealing gasket (7), an outer end cover (8), shaft end equipment (9), a drainage one-way valve (10), a sealant (11), lubricating grease (12) and a threaded hole (13).

Detailed Description

As shown in fig. 1-2, the present invention provides a waterproof axle box device, which includes an inner end cap 3, an adjusting gasket 4, an axle box body 5, a light contact type bearing 6, a rubber gasket 7, an outer end cap 8, an axle end device 9, a drainage check valve 10, a sealant 11 and grease 12. The axle box assembly is coupled with the axle 1 to cooperate with the wheels to form a complete wheel-to-axle box assembly, as shown in fig. 1.

The specific implementation mode is as follows:

1. shaft end equipment 9 passes through the bolt fastening on outer end cover 8, because the fastener is connected and need trompil on outer end cover 8, through set up the cavity boss in 8 insides of outer end cover, sets up the screw thread on the boss inner wall for screw hole 13 sets to the blind hole structure, prevents that steam from passing through the screw hole and getting into.

2. The lower part of the outer end cover 8 is provided with a drainage one-way valve 10, water can only be drained from the inside and cannot enter from the outside, and drainage is carried out during daily overhaul or shelf overhaul of the vehicle.

3. The outer end cover 8 and the axle box body 5 are fixed through bolts, the binding surface is added with the rubber sealing gasket 7 for sealing treatment, and after the outer end cover 8 of the axle box and the axle end device 9 are assembled, the outer layer of the binding surface is coated with the sealant 11, so that the external sealing performance is improved.

4. The axle box bearing adopts a light contact bearing 6, and the light contact sealing bearing 6 can simplify the sealing structure of the support and improve the service performance of the bearing. The bearing not only has good sealing effect, but also has strong heat dissipation capability. Except that the sealing lip is contacted with the outer side inclined plane of the inner ring sealing groove (not marked in figures 1-2), the grease is splashed outwards under the action of centrifugal force, so that the dustproof performance is excellent. In addition, because the sealing lip contacts the inclined plane at the outer side of the sealing groove of the inner ring, the internal pressure of the bearing is not easy to leak out of the sealing lip, and therefore the phenomenon of grease leakage is not easy to occur.

5. The axle box device component bears the gap between the axle box body 5 and the inner end cover 3 and the outer end cover 8 due to processing errors and uneven end cover bolts, and the adjusting gasket 4 is additionally arranged between the inner end cover 3 and the axle box body 5 to compensate the gap and improve the sealing performance.

Claims

1. The utility model provides a waterproof axle box device, includes interior end cover (3), axle box (5), bearing (6), outer end cover (8), axle head equipment (9) and seal assembly, be equipped with screw hole (13) on outer end cover (8), axle head equipment (9) pass through the fastener with screw hole (13) are fixed, its characterized in that, seal assembly including set up in interior end cover (3) with adjusting shim (4) of the contact position of axle box (5), screw hole (13) are the blind hole, the mounting hole has been seted up to outer end cover (8) lower part, install drainage check valve (10) in the mounting hole.

2. The waterproof axle box assembly according to claim 1, wherein the sealing assembly further comprises a rubber gasket (7), the rubber gasket (7) is hermetically mounted on the abutting surface of the axle box body (5) and the outer end cover (8), and the outer periphery of the abutting surface is coated with a sealant (11).

3. A watertight axlebox device according to claim 1, characterized in that the bearing (6) is a light contact bearing.