WO2024108624A1 - Auxiliary wheel mounting structure and monorail train - Google Patents

Abstract

Disclosed in embodiments of the present application are an auxiliary wheel mounting structure and a monorail train. The auxiliary wheel mounting structure comprises an auxiliary wheel, a bearing, a bearing end cover, an axle and a mounting support. An accommodating groove is formed in each end of the auxiliary wheel in the axis direction, an axle hole allowing the axle to penetrate through is formed in the bottom of the accommodating groove, the bearing and the bearing end cover are mounted in the accommodating groove, and the bearing and the bearing end cover are sleeved on the axle. A stepped surface is arranged on the groove wall of the accommodating groove, and an axle shoulder is arranged on the axle. After the bearing is sleeved on the axle, an outer ring of the bearing abuts against the stepped surface, an inner ring of the bearing abuts against the axle shoulder, the outer ring of the bearing is in interference-fit with the accommodating groove, and the inner ring of the bearing is in interference-fit with the axle. According to the embodiments, the outer ring of the bearing is in interference-fit with the accommodating groove, and the inner ring of the bearing is in interference-fit with the axle, so that the auxiliary wheel is connected to the axle; compared with the transition fit mode of the whole axle, the bearing and the auxiliary wheel in the prior art, the connection difficulty of the axle, the bearing and the auxiliary wheel is reduced.

Description

Auxiliary wheel installation structure and monorail train

This application claims the priority of the Chinese patent application filed with the China Patent Office on November 25, 2022, with application number 202211489875.3 and invention name “A kind of auxiliary wheel mounting structure and monorail train”, all contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the field of rail transit technology, and in particular to an auxiliary wheel mounting structure and a monorail train.

Background technique

The straddle-type monorail train used in urban rail transit transportation systems is very different from the common subway and light rail steel-wheeled vehicles in structure and appearance. It runs astride the track beams and has rubber pneumatic tires on its running wheels.

In order to prevent the running wheels from being deflated and unable to bear the load, auxiliary wheels need to be installed. Under normal operating conditions of the running wheels, there is a certain gap between the auxiliary wheels and the rail surface and they are not put into use. When the running wheels are deflated and unable to bear the load, the auxiliary wheels will replace the running wheels to bear the vertical and lateral loads, vibrations and impacts, and take on the running tasks instead of the running wheels.

The auxiliary wheel mounting structure in the prior art includes a bearing, a bearing spacer cylinder and an oil seal, etc. After the auxiliary wheel and the auxiliary wheel mounting structure are assembled, the whole is installed between the two auxiliary wheel mounting seat holes of the frame end beam, and then the axle is passed through the overall structure composed of the auxiliary wheel and the auxiliary wheel mounting structure and the auxiliary wheel mounting seat hole, and then the anti-loosening plate and the shaft end nut are fastened in place.

In the prior art, the axle is a smooth axle, and a transition fit is adopted between the axle, the bearing and the auxiliary wheel, which makes it difficult to insert the axle.

Therefore, how to reduce the difficulty of connecting the axle with the bearing and the auxiliary wheel has become a technical problem that needs to be solved urgently by those skilled in the art.

Summary of the invention

The present application proposes an auxiliary wheel installation structure to reduce the difficulty of connecting the axle with the bearing and the auxiliary wheel. The present application also proposes a monorail train

In order to achieve the above-mentioned purpose, the present application provides an auxiliary wheel installation structure, including an auxiliary wheel, a bearing, a bearing end cover, an axle and a mounting bracket.

The auxiliary wheel is sleeved on the axle.

Both ends of the auxiliary wheel in the axial direction are provided with a receiving groove, and the bottom of the receiving groove is provided with an axial hole for the axle to pass through, the bearing and the bearing end cover are installed in the receiving groove, the bearing and the bearing end cover are sleeved on the axle, and the outer ring of the bearing is interference fit with the receiving groove,

A step surface is provided at one end of the groove wall of the accommodating groove close to the groove bottom, a shaft shoulder corresponding to the position of the step surface is provided on the axle, an end face of the outer ring of the bearing abuts against the step surface, an end face of the inner ring of the bearing can abut against the shaft shoulder, and the inner ring of the bearing is interference fit with the axle.

The mounting bracket is connected to the axle, and the mounting bracket includes a first connecting plate, a second connecting plate and a third connecting plate. The first connecting plate can be connected to the frame end beam, the second connecting plate and the third connecting plate are both vertically connected to the first connecting plate, and the second connecting plate and the third connecting plate are respectively connected to both ends of the axial direction of the axle.

Preferably, in the above-mentioned auxiliary wheel mounting structure, the second connecting plate and the third connecting plate both include a mounting block and a mounting plate, the mounting plate is vertically connected to the first connecting plate, the mounting block is connected to one end of the mounting plate away from the first connecting plate, a mounting hole is provided on the mounting block, and the mounting block is connected to the axle via a bolt that cooperates with the mounting hole.

Preferably, in the above auxiliary wheel installation structure, it also includes an oil cup arranged on the auxiliary wheel, and the oil cup is used to inject lubricating oil into the bearing.

Preferably, the auxiliary wheel mounting structure further comprises a sealing assembly for preventing the lubricating oil from leaking from the bearing end cover.

Preferably, in the auxiliary wheel mounting structure, the sealing assembly comprises a first sealing ring, a second sealing ring and a third sealing ring.

The first sealing ring is located between the axle and the auxiliary wheel.

The second sealing ring is located on the side where the bearing end cover is in contact with the outer ring of the bearing.

The third sealing ring is located on the inner ring of the bearing end cover.

Preferably, in the above auxiliary wheel mounting structure, the first sealing ring is a lip sealing ring.

Preferably, in the above auxiliary wheel mounting structure, the second sealing ring is a lip sealing ring.

Preferably, in the above auxiliary wheel mounting structure, the third sealing ring is an O-ring.

Preferably, in the above auxiliary wheel mounting structure, the bearing is a tapered roller bearing.

The present application also discloses a monorail train, comprising an auxiliary wheel mounting structure, wherein the auxiliary wheel mounting structure is the auxiliary wheel mounting structure recorded in any one of the above schemes.

The auxiliary wheel installation structure provided in the embodiment of the present application includes an auxiliary wheel, a bearing, a bearing end cover, an axle and a mounting bracket. A receiving groove is provided at both ends of the axial direction of the auxiliary wheel, and an axial hole for the axle to pass through is provided at the bottom of the receiving groove. The bearing and the bearing end cover are installed in the receiving groove, and the bearing and the bearing end cover are sleeved on the axle. The groove wall of the receiving groove is provided with a step surface, and the axle is provided with a shaft shoulder corresponding to the position of the step surface. After the bearing is sleeved on the axle, the outer ring of the bearing abuts against the step surface, the inner ring of the bearing abuts against the shaft shoulder, the outer ring of the bearing is interference fit with the receiving groove, and the inner ring of the bearing is interference fit with the axle. In this embodiment, the connection between the auxiliary wheel and the axle is achieved by the interference fit between the outer ring of the bearing and the receiving groove, and the interference fit between the inner ring of the bearing and the axle. Compared with the transition fit between the entire axle, the bearing and the auxiliary wheel in the prior art, the difficulty of connecting the axle, the bearing and the auxiliary wheel is reduced.

The present application also discloses a monorail train, including an auxiliary wheel mounting structure, wherein the auxiliary wheel mounting structure is the auxiliary wheel mounting structure described in any one of the above schemes. Since the auxiliary wheel mounting structure has the above technical effects, the monorail train having the auxiliary wheel mounting structure also has the same technical effects, which will not be described in detail here.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work, and the present application can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

FIG1 is a schematic structural diagram of the auxiliary wheel installation structure of the present application;

FIG. 2 is a cross-sectional view of the auxiliary wheel mounting structure of the present application with the mounting bracket hidden.

in:

1. Auxiliary wheel, 2. Bearing, 3. Axle, 4. Bearing end cover, 5. Third sealing ring, 6. Second sealing ring, 7. First sealing ring, 8. Oil cup, 9. Mounting bracket, 91. First connecting plate, 92. Second connecting plate, 93. Third connecting plate.

Detailed ways

The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are only used to explain the related application, rather than to limit the application. The described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

It should be noted that, for the convenience of description, only the parts related to the relevant application are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

It should be understood that the "system", "device", "unit" and/or "module" used in this application is a method for distinguishing different components, elements, parts, parts or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and/or "the" do not refer to the singular and may also include the plural, unless the context clearly indicates an exception. Generally speaking, the terms "comprises" and "includes" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "comprises a..." do not exclude the existence of other identical elements in the process, method, product or device that includes the elements.

In the description of the embodiments of the present application, unless otherwise specified, "/" means or, for example, A/B can mean A or B; "and/or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

Flowcharts are used in the present application to illustrate the operations performed by the system according to the embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, the various steps may be processed in reverse order or simultaneously. At the same time, other operations may also be added to these processes, or one or more operations may be removed from these processes.

Please refer to Figures 1 and 2. Some embodiments of the present application disclose an auxiliary wheel mounting structure suitable for a straddle-type monorail train.

The auxiliary wheel mounting structure disclosed in the present application is used to realize the integrated installation of the auxiliary wheel 1 and the axle 3. The auxiliary wheel mounting structure includes the auxiliary wheel 1, a bearing 2, a bearing end cover 4, the axle 3 and a mounting bracket 9.

The auxiliary wheel 1 is sleeved on the axle 3 , and bearings 2 and bearing end covers 4 are provided at both ends of the auxiliary wheel 1 in the axial direction. The auxiliary wheel 1 is fixed on the axle 3 through the bearings 2 and the bearing end covers 4 .

As shown in FIG2 , both ends of the auxiliary wheel 1 in the axial direction are provided with receiving grooves, and an axial hole for the axle 3 to pass through is provided at the bottom of the receiving groove, and a bearing 2 and a bearing end cover 4 are installed in the receiving groove, and the bearing 2 and the bearing end cover 4 are sleeved on the axle 3, wherein the bearing 2 is close to the bottom of the receiving groove relative to the bearing end cover 4.

A step surface is provided at one end of the groove wall of the receiving groove near the groove bottom, and a shaft shoulder corresponding to the position of the step surface is provided on the axle 3. After the bearing 2 is sleeved on the axle 3, the outer ring of the bearing 2 abuts against the step surface, the inner ring of the bearing 2 abuts against the shaft shoulder, the outer ring of the bearing 2 is interference fit with the receiving groove, and the inner ring of the bearing 2 is interference fit with the axle 3. In this embodiment, the connection between the auxiliary wheel 1 and the axle 3 is achieved by the interference fit between the outer ring of the bearing 2 and the receiving groove, and the interference fit between the inner ring of the bearing 2 and the axle 3. Compared with the transition fit between the entire axle 3 and the bearing 2 and the auxiliary wheel 1 in the prior art, the connection difficulty of the axle 3 and the bearing 2 and the auxiliary wheel 1 is reduced. Both ends of the axial direction of the auxiliary wheel 1 are limited on the axle 3 by the bearing 2.

The present application adopts the bearing end cover 4 structure to replace the bearing 2 spacing cylinder and bushing, which is easy to disassemble and install and saves maintenance costs.

The axle 3 and the auxiliary road are an integrally mounted structure, which reduces the difficulty of disassembling and installing the auxiliary wheel 1 and saves maintenance costs.

The mounting bracket 9 is connected to the axle 3, and the mounting bracket 9 includes a first connecting plate 91, a second connecting plate 92 and a third connecting plate 93. The first connecting plate 91 can be connected to the frame end beam, and the second connecting plate 92 and the third connecting plate 93 are both vertically connected to the first connecting plate 91. The second connecting plate 92 and the third connecting plate 93 are respectively connected to the two ends of the axial direction of the axle 3.

The second connecting plate 92 and the third connecting plate 93 are L-shaped structures or T-shaped structures, and the L-shaped structure or T-shaped structure includes a mounting plate and a mounting block, wherein the mounting plate is connected to the first connecting plate 91, and the mounting block is connected to one end of the mounting plate away from the first connecting plate 91, and the connecting block and the connecting plate form an L-shaped structure or a T-shaped structure.

The mounting block is provided with a mounting hole, and the mounting block is connected to the axle 3 through a bolt matched with the mounting hole, which is located below the mounting block.

In the present application, the axle 3 is designed as a stepped axle with a shoulder, and the shoulder is used to position the bearing 2 to ensure that the auxiliary wheel 1 will not deviate left or right.

The mounting bracket 9 disclosed in the present application can be connected with the integrated auxiliary wheel 1 and the axle 3, thereby reducing the difficulty of connecting the auxiliary wheel mounting structure with the frame end beam.

Preferably, the second connecting plate 92 and the third connecting plate are both integrally formed connecting plates.

Preferably, the mounting bracket 9 is an integrally formed bracket.

The auxiliary wheel installation structure disclosed in the present application further includes an oil cup 8 , which is disposed on the auxiliary wheel 1 and is used to inject lubricating oil into the bearing 2 .

Specifically, the auxiliary wheel 1 is provided with a mounting hole for mounting the oil cup 8 , and a thread locking glue is applied thereto, so that the lubricating oil flows from the oil cup 8 into the interior of the bearing 2 to lubricate the bearing 2 .

In order to prevent the lubricating oil inside the bearing 2 from leaking, the auxiliary wheel installation structure disclosed in the present application further includes a sealing assembly for preventing the lubricating oil from leaking from the bearing end cover 4 .

In some embodiments of the present application, the sealing assembly includes a first sealing ring 7 , a second sealing ring 6 and a third sealing ring 5 .

The first sealing ring 7 is located between the axle 3 and the auxiliary wheel 1 and is used to seal the inner side of the bearing 2 .

Preferably, a groove for installing the first sealing ring 7 is provided on the hole wall of the shaft hole, and the first sealing ring 7 is embedded in the groove.

Preferably, the inner ring of the first sealing ring 7 is in interference fit with the axle 3 , and the axle 3 can also press the first sealing ring 7 .

Apply lubricating grease to the first sealing ring 7 and the outer ring of the bearing 2 , press the outer ring of the bearing 2 into the receiving groove, and strike the outer ring of the bearing 2 to make it fit tightly with the step surface of the auxiliary wheel 1 .

The second sealing ring 6 is located on the side where the bearing end cover 4 fits the outer ring of the bearing 2 , and the third sealing ring 5 is located on the inner ring of the bearing end cover 4 . The second sealing ring 6 cooperates with the third sealing ring 5 to seal the outer side of the bearing 2 .

Specifically, the second sealing ring 6 is used to seal the gap between the bearing end cover 4 and the accommodating groove, and the third sealing ring 5 is used to seal the gap between the bearing end cover 4 and the axle 3.

In some embodiments of the present application, the first sealing ring 7 and the second sealing ring 6 are lip-shaped sealing rings. The lip-shaped sealing ring is not easy to age, has good wear resistance, can automatically compensate to a certain extent after wear, and has a long service life; when there is relative motion, the friction caused by the seal is small and the friction coefficient is stable; the lip-shaped sealing ring has a simple structure, is easy to use and maintain, and has a low cost.

In some embodiments of the present application, the third sealing ring 5 is an O-ring. An O-ring is a rubber ring with a circular cross section, which is an effective and economical sealing element. An O-ring is a bidirectional sealing element, which has elasticity and resilience; has appropriate mechanical strength, including expansion strength, elongation and tear strength; has stable performance, is not easy to swell in the medium, and has a small thermal shrinkage effect; is easy to process and shape, and can maintain precise dimensions; does not corrode the contact surface, and does not pollute the medium.

The bearing 2 used in the present application is a tapered roller bearing. The tapered roller bearing has a large load-bearing capacity, can withstand axial loads in one direction, and can limit the axial displacement of the shaft or the auxiliary wheel 1 in one direction.

The whole consisting of the auxiliary wheel 1, the bearing 2, the bearing end cover 4, the axle 3 and the mounting bracket 9 is mounted on the end beam of the bogie, wherein the mounting bracket 9 is connected to the end beam.

Under normal operating conditions of the running wheels, there is a certain gap between the auxiliary wheel 1 and the rail surface. It is not usually put into use as a safety precaution. When the running wheel has a tire burst or deflated, the auxiliary wheel 1 will contact the track beam and replace the running wheel to bear vertical and lateral loads, vibrations, and impacts to perform the running task.

The present application also discloses a monorail train, comprising an auxiliary wheel mounting structure, wherein the auxiliary wheel mounting structure is the auxiliary wheel mounting structure recorded in any one of the above schemes.

Since the auxiliary wheel mounting structure has the above-mentioned technical effects, the monorail train having the auxiliary wheel mounting structure also has the same technical effects, which will not be described in detail here.

The above description is only a preferred embodiment of the present application and an explanation of the technical principles used, and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. The scope of application involved in the present application is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned application concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in this application (but not limited to) to form a technical solution.

Claims (10)

1. An auxiliary wheel mounting structure, characterized in that it comprises an auxiliary wheel (1), a bearing (2), a bearing end cover (4), an axle (3) and a mounting bracket (9),

   The auxiliary wheel (1) is sleeved on the axle (3).

   Both ends of the auxiliary wheel (1) in the axial direction are provided with receiving grooves, the bottom of the receiving groove is provided with an axial hole for the axle (3) to pass through, the bearing (2) and the bearing end cover (4) are installed in the receiving groove, the bearing (2) and the bearing end cover (4) are sleeved on the axle (3), and the outer ring of the bearing (2) is interference-fitted with the receiving groove.

   A step surface is provided at one end of the groove wall of the accommodating groove close to the groove bottom, a shaft shoulder corresponding to the position of the step surface is provided on the axle (3), an end face of the outer ring of the bearing (2) abuts against the step surface, an end face of the inner ring of the bearing (2) can abut against the shaft shoulder, and the inner ring of the bearing (2) and the axle (3) are interference fit.

   The mounting bracket (9) is connected to the axle (3), and the mounting bracket (9) comprises a first connecting plate (91), a second connecting plate (92) and a third connecting plate (93); the first connecting plate (91) can be connected to the frame end beam, the second connecting plate (92) and the third connecting plate (93) are both vertically connected to the first connecting plate (91), and the second connecting plate (92) and the third connecting plate (93) are respectively connected to the two ends of the axial direction of the axle (3).
2. The auxiliary wheel mounting structure according to claim 1 is characterized in that the second connecting plate (92) and the third connecting plate (93) both include a mounting block and a mounting plate, the mounting plate is vertically connected to the first connecting plate (91), the mounting block is connected to an end of the mounting plate away from the first connecting plate (91), a mounting hole is provided on the mounting block, and the mounting block is connected to the axle (3) via a bolt that cooperates with the mounting hole.
3. The auxiliary wheel mounting structure according to claim 1 is characterized by further comprising an oil cup (8) arranged on the auxiliary wheel (1), wherein the oil cup (8) is used to inject lubricating oil into the bearing (2).
4. The auxiliary wheel mounting structure according to claim 3 is characterized by further comprising a sealing assembly for preventing the lubricating oil from leaking from the bearing end cover (4).
5. The auxiliary wheel mounting structure according to claim 4 is characterized in that the sealing assembly comprises a first sealing ring (7), a second sealing ring (6) and a third sealing ring (5),

   The first sealing ring (7) is located between the axle (3) and the auxiliary wheel (1).

   The second sealing ring (6) is located on the side where the bearing end cover (4) and the outer ring of the bearing (2) are in contact with each other.

   The third sealing ring (5) is located on the inner ring of the bearing end cover (4).
6. The auxiliary wheel mounting structure according to claim 5, characterized in that the first sealing ring (7) is a lip sealing ring.
7. The auxiliary wheel mounting structure according to claim 5, characterized in that the second sealing ring (6) is a lip sealing ring.
8. The auxiliary wheel mounting structure according to claim 5, characterized in that the third sealing ring (5) is an O-ring.
9. The auxiliary wheel mounting structure according to claim 1, characterized in that the bearing (2) is a tapered roller bearing.
10. A monorail train, characterized in that it comprises an auxiliary wheel mounting structure, wherein the auxiliary wheel mounting structure is the auxiliary wheel mounting structure according to any one of claims 1 to 9.

Images