CN209814005U - Horizontal wheel shafting assembly of straddle type monorail vehicle - Google Patents

Abstract

The utility model relates to a straddle type monorail vehicle horizontal wheel shafting subassembly, including the bearing frame of axle, fixed axle and establish upper bearing and the lower bearing between axle and bearing frame, the axle with labyrinth seal between the bearing frame, the axle with bearing frame seal interface's place forms labyrinth seal clearance, is in labyrinth seal clearance department be equipped with the arch on the bearing frame, and be equipped with the end cover on the bearing frame, be equipped with the sealing washer between end cover and the bearing frame. Through the design of arch and sealing washer in this application, realized bearing structure last sealed, in addition, still be equipped with the oil scraper ring between upper bearing and lower bearing, make the bearing can not produce the dry friction and the lubricated condition of crossing in operating condition, finally improved the life and the work precision of bearing.

Description

Horizontal wheel shafting assembly of straddle type monorail vehicle

Technical Field

The utility model relates to a rail transit vehicle technical field especially relates to a straddle type monorail vehicle horizontal wheel shafting subassembly.

Background

The shafting subassembly is as the essential part on the straddle type monorail car, mainly comprises axle, bearing frame and bearing, and the bearing is the important part of bearing frame and the tire assembly body of supporting rather than the complex, can reduce the coefficient of friction between axle and the bearing frame and the tire assembly body in the motion process and guarantee the gyration precision. Besides being influenced by the material and structure of the bearing, the service life and the working precision of the bearing are important factors which are not negligible.

Cleanliness aspects, such as: the tiny particles such as pollutants, dust and the like are adsorbed on the surface of a rolling bearing without special protection, particularly a lubricated surface, friction similar to an abrasive material type is formed, so that the contact part between a rolling body and a raceway of the bearing is seriously abraded, the service life of the bearing is shortened under long-term abrasion, and the working precision of the bearing is influenced. In addition, the low cleanliness of the rolling bearing causes undesirable failures such as vibration, noise, and abnormal sound. Lubricant aspects, such as: the excessive grease adding amount in the bearing can increase the friction torque, increase the temperature and increase the grease consumption; if the amount of the grease is too small, reliable lubrication cannot be obtained and dry friction occurs. Generally, the amount of grease is desirably 1/3-1/2 of the total void volume in the bearing, but cavity lubrication is sometimes used as the case may be. Therefore, the bearing lubrication and cleanliness are very important to guarantee. Except that the cleanliness of the external working environment is guaranteed, the box is opened and taken out and loaded normally, and a proper amount of lubricating grease is added, shafting sealing can be carried out through the structural design.

Disclosure of Invention

The utility model aims to solve the problem that how the bearing easily receives micro-particle absorption such as pollutant, dust and causes life and work precision to reduce, provide a straddle type monorail vehicle horizontal wheel shafting subassembly.

In order to achieve the above object, the present application provides a horizontal wheel shafting assembly for a straddle-type monorail vehicle, comprising a shaft, a bearing seat for fixing the shaft, and an upper bearing and a lower bearing arranged between the shaft and the bearing seat, wherein an end cover is arranged at the lower part of the shaft, and the end cover is fixed on the bearing seat.

As a further improvement of the present application, the clearance of the labyrinth seal is 0.5mm, and the clearance between the projection and the shaft is 0.1 mm.

As a further improvement of the present application, a seal ring is provided between the end cap and the bearing seat.

As a further improvement of the present application, an oil slinger is provided between the upper bearing and the lower bearing.

As a further improvement of the present application, the slinger includes a first slinger and a second slinger, the second slinger is provided at a lower portion of the first slinger, the first slinger is provided at a lower portion of the upper bearing, and the second slinger is provided at an upper portion of the lower bearing.

As a further improvement of the application, a bearing pressure plate is arranged at the lower part of the lower bearing and is used for supporting the lower bearing.

As a further improvement of the application, the end cover is provided with a locking device.

As a further improvement of the application, the projection is annular.

The beneficial effects of this application lie in, through locating at labyrinth seal clearance be equipped with the arch on the bearing frame, make the axle sealed for the contact with the initial stage of bearing frame assembly, still be equipped with the end cover on the bearing frame for making bearing and external isolation, and be equipped with the sealing washer between end cover and the bearing frame, protruding with the sealing washer has realized bearing structure is last the upper bearing with be equipped with the oil scraper ring down between the bearing, make the bearing can not produce the dry friction and cross lubricated condition in operating condition, finally improved the life and the work precision of bearing.

Drawings

FIG. 1 is a schematic structural view of a horizontal wheel shafting assembly of a straddle-type monorail vehicle;

FIG. 2 is a structural diagram of a sealing contact part of a shaft and a bearing seat of a horizontal wheel shafting assembly of the straddle-type monorail vehicle.

In the figure: 1. a shaft; 2. a bearing seat; 3. an upper bearing; 4. a lower bearing; 5. a protrusion; 6. an end cap; 7. a seal ring; 8. a first oil slinger; 9. a second oil retainer; 10. and bearing pressing plates.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. In the description of the present application, it is to be understood that the same or similar elements in different drawings are designated by the same reference numerals. The dimensions, proportions and number of elements are not intended to be limiting.

As shown in fig. 1, a horizontal wheel shafting assembly of a straddle-type monorail vehicle comprises a shaft 1, a bearing seat 2 for fixing the shaft, and an upper bearing 3 and a lower bearing 4 which are arranged between the shaft 1 and the bearing seat 2, wherein a labyrinth seal is arranged between the shaft 1 and the bearing seat 2, and a labyrinth seal gap is formed at a sealing interface between the shaft 1 and the bearing seat 2, as shown in fig. 2, a protrusion 5 is arranged on the bearing seat 2 at the labyrinth seal gap, the protrusion 5 is annular, and the labyrinth seal gap is larger than a gap between the protrusion 5 and the shaft 1, such as: the clearance of labyrinth seal is 0.5mm, the clearance between arch 5 and axle 1 is 0.1 mm. The protrusion 5 makes the shaft 1 and the bearing seat 2 be contact type sealing at the initial stage of assembly, and the shaft 1 and the bearing seat 2 are converted into labyrinth sealing after smooth operation. Compared with pure contact type sealing, the installation difficulty is reduced, and the sealing performance is better than that of pure labyrinth sealing. The design that the protrusions 5 are arranged on the bearing seat 2 where the labyrinth seal gap is located enhances the sealing performance of a shaft system, and the bearing can be effectively isolated from the external working environment, so that the cleanliness of the bearing is improved, and the service life of the bearing is ensured.

In this application, as shown in fig. 1, for making the bearing keep apart with the external world, this application is still in the below of axle 1 is equipped with the end cover, end cover 6 assembles on the bearing frame 2 for it is sealed end cover 6 with be equipped with sealing washer 7 between the bearing frame 2, sealing washer 7 is used for strengthening end cover 6 with leakproofness between the bearing frame 2. Because the horizontal wheel train can continuously vibrate in the vehicle operation process, the fastening structure between the end cover 6 and the bearing seat 2 can be loosened, and in order to prevent the end cover 6 from being loosened, a locking device needs to be arranged on the end cover 6, such as: the bearing seat 2 is provided with a bolt, holes are designed on the bottom end of the end cover 6 and the tail end of the bolt, the holes are through holes, a steel wire sequentially penetrates through the hole on the tail end of the bolt and the hole on the bottom end of the end cover 6, the bolt and the end cover 6 are connected in series to realize mutual braking, and when the end cover has a loosening tendency, the end cover 6 is prevented from rotating through the tightened steel wire to realize the effect of preventing the end cover 6 from loosening; the steel wire is a low-carbon steel wire.

In this application, because of shafting operating condition is vertical state, receive gravity and centrifugal force's combined action, the lubricating grease that adds on the bearing can have the trend of axle end motion, and this will cause the lubricated not enough of upper bearing 3, the problem of lower bearing 4 over-lubrication. Therefore, this application is designed to assemble an oil slinger between the upper bearing 3 and the lower bearing 4, the oil slinger including a first oil slinger 8 and a second oil slinger 9, the second oil slinger 9 being provided at a lower portion of the first oil slinger 8, the first oil slinger 8 being provided at a lower portion of the upper bearing 3, and the second oil slinger 9 being provided at an upper portion of the lower bearing 4. And a proper amount of grease is filled in a cavity between the shaft 1 and the bearing seat 2, so that the bearing cannot generate dry friction and over-lubrication in a working state. In addition, in the process that the bearing seat 2 moves around the shaft 1, the upper bearing 3 and the lower bearing 4 are easy to move relatively, and a bearing pressing plate 10 is arranged at the lower part of the lower bearing 4 and is used for supporting the lower bearing 4 and preventing the shaft 1, the upper bearing 3 and the lower bearing 4 from moving relatively, and is used for fixing the positions of the shaft 1, the upper bearing 3 and the lower bearing 4.

In summary, the bearing seat at the labyrinth seal gap is provided with the protrusion 5, so that the initial stage of assembling the shaft 1 and the bearing seat 2 is in contact seal, the bearing seat 2 is further provided with the end cover 6 for isolating the bearing from the outside, the sealing ring 7 is arranged between the end cover 6 and the bearing seat 2, the protrusion 5 and the sealing ring 7 jointly realize seal on the bearing structure, the oil retainer ring is arranged between the upper bearing 3 and the lower bearing 4, so that the bearing cannot generate dry friction and over-lubrication in a working state, and the service life and the working precision of the bearing are finally improved.

The present application has been described in connection with only the presently preferred embodiments with the understanding that the present disclosure is not to be considered as limiting, and the present application is not limited to the examples described above, but rather, it is to be understood that changes, modifications, additions or substitutions that are within the spirit and scope of the application by one of ordinary skill in the art are included.

Claims (8)

1. The utility model provides a straddle type monorail vehicle horizontal wheel shafting subassembly, includes axle (1), fixes bearing frame (2) of axle (1) and establish axle (1) with upper bearing (3) and lower bearing (4) between bearing frame (2) the lower part of axle (1) is equipped with end cover (6), end cover (6) are fixed to on bearing frame (2), its characterized in that, axle (1) with labyrinth seals between bearing frame (2), axle (1) with bearing frame (2) seal interface's place forms labyrinth seal clearance, is equipped with arch (5) on labyrinth seal clearance department bearing frame (2).

2. The straddle-type monorail vehicle horizontal wheel shafting assembly according to claim 1, wherein the labyrinth seal clearance is 0.5mm, and the clearance between the protrusions (5) and the shaft (1) is 0.1 mm.

3. The horizontal wheelset assembly of a straddle-type monorail vehicle according to claim 1, characterized in that a sealing ring (7) is arranged between the end cover (6) and the bearing seat (2).

4. The horizontal wheel shafting assembly of the straddle-type monorail vehicle as claimed in claim 1, wherein an oil slinger is arranged between the upper bearing (3) and the lower bearing (4).

5. The horizontal wheel shafting assembly of the straddle-type monorail vehicle as claimed in claim 4, wherein said oil slinger comprises a first oil slinger (8) and a second oil slinger (9), said second oil slinger (9) is disposed at the lower portion of said first oil slinger (8), said first oil slinger (8) is disposed at the lower portion of said upper bearing (3), and said second oil slinger (9) is disposed at the upper portion of said lower bearing (4).

6. The horizontal wheelset assembly of the straddle-type monorail vehicle as claimed in claim 1, wherein a bearing pressure plate (10) is provided at a lower portion of the lower bearing (4), and the bearing pressure plate (10) is used for supporting the lower bearing (4).

7. The horizontal wheel shafting assembly of the straddle-type monorail vehicle as claimed in claim 1, wherein a locking device is arranged on the end cover (6).

8. The horizontal wheel shafting assembly of the straddle-type monorail vehicle as claimed in claim 1, wherein the protrusions (5) are annular.