Straddle-type monorail guide wheel axle system assembly, guide wheel and vehicle

Abstract

The utility model provides a kind of straddle type monorail guide wheel axle system assembly, guide wheel and vehicle, it is related to rail transit vehicle technical field, including wheel axle, bearing assembly and anti-loose component, bearing assembly includes bearing seat, first bearing, second bearing and spacer sleeve, two ends of spacer sleeve are respectively abutted on the two ends of first bearing and second bearing close to each other;The axial relative position between first bearing and the inner ring of second bearing can be accurately separated by spacer sleeve, a rigid "first bearing-spacer sleeve-second bearing" module is formed, the axial dimension of this module is determined by the length of spacer sleeve, and is not disturbed by part manufacturing error and temperature difference deformation.And using the fixed limit of shaft shoulder and the adjustable compression of anti-loose component, stable axial pre-tightening force is applied to the module from both sides, the rigidity of bearing assembly whole is enhanced.Fundamentally guarantee bearing play constant, improve the carrying capacity of axle system assembly, impact resistance and safe service life.

Description

Technical Field

[0001] This utility model relates to the field of rail transit vehicle technology, specifically to a straddle-type monorail guide wheel axle assembly, guide wheel, and vehicle. Background Technology

[0002] In straddle-type monorail transit systems, the running wheels, as the core load-bearing components, continuously bear the entire vertical load of the vehicle body and maintain contact with the top surface of the track beam; the guide wheels (also known as horizontal wheels), as key guiding components, achieve precise guidance and anti-overturning functions by contacting the two sides of the track beam, ensuring that the train travels stably along the track.

[0003] Bearing clearance (also known as bearing gap or oil film clearance) is a crucial parameter in bearing design, directly affecting lubrication performance, load-bearing capacity, and bearing life. In existing technologies, dual-bearing assemblies for guide wheels suffer from insufficient bearing clearance stability, leading to lubrication failure due to oil film thickness fluctuations under varying load conditions; abnormal vibration caused by lateral impacts; premature fatigue failure due to bearing contact stress concentration; and drift in guide wheel positioning accuracy. These issues severely impact the safety and lifespan of the guide wheel. Utility Model Content

[0004] This invention addresses the problem of insufficient clearance stability in the dual-bearing assembly of the guide wheel by proposing a straddle-type monorail guide wheel shaft system assembly, guide wheel, and vehicle to ensure accurate and stable bearing clearance, thereby enabling the bearing to operate in its optimal state and guaranteeing the safe and stable operation of the guide wheel.

[0005] To solve the above problems, this utility model provides a straddle-type monorail guide wheel shaft system assembly, guide wheel, and vehicle.

[0006] In a first aspect, the present invention provides a straddle-type monorail guide wheel axle assembly, comprising:

[0007] Axle, with a shoulder at the first end;

[0008] The bearing assembly includes a bearing housing, a first bearing, a second bearing, and a spacer sleeve. The spacer sleeve is fitted onto the axle, and its two ends abut against the opposite end faces of the inner rings of the first and second bearings, respectively. The bearing housing is fitted onto the outer rings of the first and second bearings and is connected to the outer rings of the first and second bearings.

[0009] The anti-loosening component is connected to the second end of the wheel axle and forms a press-fit with the end of the inner ring of the second bearing away from the spacer sleeve.

[0010] The shoulder and the end of the inner ring of the first bearing away from the spacer sleeve form an axial limiting fit.

[0011] In one embodiment of the present invention, a sealing sleeve is further included. The sealing sleeve is fitted onto the axle. One end of the sealing sleeve and the end of the bearing seat near the axle shoulder form a labyrinth-type sealing structure and abut against the end face of the inner ring of the first bearing. The other end of the sealing sleeve abuts against the axle shoulder.

[0012] In one embodiment of the present invention, a first oil receiving tray and a second oil receiving tray are further included. The first oil receiving tray is axially limited and installed in the bearing housing on the side of the first bearing near the spacer sleeve, and the second oil receiving tray is axially limited and installed in the bearing housing on the side of the second bearing away from the spacer sleeve.

[0013] In one embodiment of the present invention, a positioning sleeve is further included. The positioning sleeve is axially limited and installed in the bearing seat and is located on the side of the second bearing away from the second oil receiving pan. The spacer sleeve is a variable diameter cylindrical structure, and its cylindrical diameter at the end facing the first bearing is larger than that at the end facing the second bearing. The inner circular surface of the positioning sleeve and the outer circular surface of the smaller cylindrical diameter end of the spacer sleeve are in clearance fit.

[0014] In one embodiment of the present invention, the anti-loosening component includes a first locking nut and a second locking nut that are sequentially threaded onto the axle, wherein the first locking nut is axially pressed against the end face of the second oil receiving pan away from the second bearing.

[0015] In one embodiment of the present invention, the anti-loosening component further includes a washer, which is sandwiched between the first locking nut and the second locking nut and cooperates with the keyway of the wheel axle. The outer ring of the washer is provided with a limiting flange.

[0016] In one embodiment of the present invention, the anti-loosening component further includes an anti-detachment cap, which is threadedly connected to the second end of the wheel axle.

[0017] Secondly, the present invention provides a guide wheel, including the above-mentioned straddle-type monorail guide wheel shaft system assembly, and further including a horizontal wheel body and an external support wheel. The horizontal wheel body is connected to the bearing seat of the straddle-type monorail guide wheel shaft system assembly, and the external support wheel is disposed at the end of the horizontal wheel body near the anti-loosening component.

[0018] In one embodiment of the present invention, the external support wheel includes an integrally formed aluminum alloy wheel core and a sealing cover. The sealing cover is disposed on the second end of the wheel axle and is provided with an observation window. The outer circumference of the aluminum alloy wheel core is vulcanized with a polyurethane coating.

[0019] Thirdly, the present invention provides a vehicle comprising the aforementioned straddle-type monorail guide wheel axle assembly, or comprising the aforementioned guide wheel.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention fundamentally ensures the precision and long-term stability of bearing clearance. Specifically, by using a spacer sleeve, the axial relative position between the inner rings of the first and second bearings is precisely set and isolated, forming a rigid "first bearing-spacer sleeve-second bearing" module. The axial dimension of this module is determined by the length of the spacer sleeve and is unaffected by manufacturing errors or temperature-induced deformation. During assembly, a stable axial preload is applied from both sides to secure the module using a shoulder fixing limit at the first end of the axle and an adjustable clamping mechanism at the second end to prevent loosening. This fundamentally eliminates the clearance variation caused by axial movement of the inner and outer rings of the bearing under complex variable loads and lateral impact conditions, ensuring a constant bearing working clearance. The long-term stability of the clearance directly ensures the consistency of the oil film thickness and the continuous reliability of lubrication, thereby significantly improving the bearing's load-bearing capacity, shock and vibration resistance, and service life.

[0022] When the guide wheel of this invention is in operation, it needs to withstand lateral forces (radial forces), and these lateral forces are dynamically changing, potentially accompanied by strong impacts and vibrations. Due to the adoption of the aforementioned straddle-type monorail guide wheel shaft system assembly, the rigidity of the "first bearing-spacer sleeve-second bearing" module is greatly improved, eliminating the risk of bearing inner ring tilting. Simultaneously, the anti-loosening component resists loosening caused by vibration. This ensures that regardless of changes in lateral force, the internal clearance of the bearing remains constant, allowing the bearing to always operate in its optimal design state. This guarantees that the guide wheel's positioning accuracy never drifts, and operational safety and stability are significantly improved. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a straddle-type monorail guide wheel shaft system assembly according to an embodiment of the present invention;

[0024] Figure 2 This is an axial sectional view of a straddle-type monorail guide wheel shaft system assembly according to an embodiment of the present invention;

[0025] Figure 3 This is a three-dimensional structural diagram of a guide wheel according to one embodiment of the present invention;

[0026] Figure 4 This is a top view of a guide wheel in one embodiment of the present invention;

[0027] Figure 5 for Figure 4 AA sectional view.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1-Wheel axle; 11-Shaft shoulder; 2-Bearing assembly; 21-Bearing housing; 22-First bearing; 221-First oil receiving pan; 23-Second bearing; 231-Second oil receiving pan; 24-Spacer sleeve; 25-Positioning sleeve; 3-Anti-loosening component; 31-First locking nut; 32-Washer; 33-Second locking nut; 34-Anti-detachment cover; 4-Sealing sleeve; 100-Horizontal wheel body; 200-External support wheel; 201-Aluminum alloy wheel core; 202-Sealing cover. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the accompanying drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0031] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0032] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0033] In related technologies, in straddle-type monorail transit systems, guide wheels (horizontal wheels) are installed in pairs on both sides of the bogie, with their wheel surfaces contacting the sides of the track beam. When the vehicle is moving, especially on curves, the guide wheels bear continuous and enormous lateral loads. Their function is to provide precise guidance and resist vehicle overturning, ensuring stable train tracking. When the guide wheels bear continuous and enormous lateral forces, these forces cause slight bending deformation of the axle. This bending deformation is directly transmitted to the inner ring of the bearing with its interference fit, causing the inner ring to tilt relative to the outer ring. This tilting results in extremely uneven clearance distribution within the bearing. On the stressed side, the clearance between the rolling elements and the raceway almost disappears, or even becomes pre-tightened; while on the opposite side, the clearance increases abnormally. On the side with no clearance, rolling element friction intensifies, temperature rises sharply, and lubrication deteriorates; on the side with increased clearance, the rolling elements will slip when not under load, and generate enormous impact stress when under load. This "one end too tight, one end too loose" state is a significant contributing factor to abnormal bearing wear and early fatigue spalling. Ultimately, this threatens the positioning accuracy of the guide wheels and the operational safety of rail vehicles.

[0034] To address the problems existing in the aforementioned related technologies, this utility model provides a straddle-type monorail guide wheel axle assembly, guide wheel, and vehicle.

[0035] Please see Figure 1 and Figure 2 In a first aspect, the present invention provides a straddle-type monorail guide wheel axle assembly, including an axle 1, a bearing assembly 2, and an anti-loosening component 3. The bearing assembly 2 includes a bearing seat 21, a first bearing 22, a second bearing 23, and a spacer sleeve 24. The spacer sleeve 24 is sleeved on the axle 1, and its two ends abut against the opposite end faces of the inner rings of the first bearing 22 and the second bearing 23, respectively. The bearing seat 21 is sleeved outside the first bearing 22 and the second bearing 23 and connected to the outer rings of the first bearing 22 and the second bearing 23. The anti-loosening component 3 is connected to the second end of the axle 1 and forms a press-fit with the end of the inner ring of the second bearing 23 away from the spacer sleeve 24. The first end of the axle 1 is provided with a shoulder 11, and the shoulder 11 and the end of the inner ring of the first bearing 22 away from the spacer sleeve 24 form an axial limiting fit.

[0036] It should be noted that the spacer sleeve 24 precisely sets and isolates the axial relative position between the inner rings of the first bearing 22 and the second bearing 23, forming a rigid "first bearing 22-spacer sleeve 24-second bearing 23" module. The axial dimension of this module is determined by the length of the spacer sleeve 24 and is not affected by manufacturing errors or temperature deformation. During assembly, the fixed limit of the shoulder 11 at the first end of the axle 1 and the adjustable clamping of the anti-loosening component 3 at the second end are used to apply a stable axial preload to the module from both sides and reliably lock it, further enhancing the overall rigidity of the bearing assembly. This fundamentally eliminates the clearance changes caused by axial movement of the inner and outer rings of the bearing under complex variable load and lateral impact conditions, making the bearing working clearance constant. The long-term stability of the clearance directly ensures the consistency of the oil film thickness and the continuous reliability of the lubrication state, thereby significantly improving the load-bearing capacity, impact and vibration resistance, and service life of the straddle-type monorail guide wheel shaft system assembly of this utility model. In addition, the bearing housing 21, which is fitted outside the first bearing 22, the second bearing 23 and the spacer sleeve 24, can also cooperate with the shaft shoulders 11 at both ends and the anti-loosening components 3 to form a lubrication cavity, thereby improving the lubrication effect on the first bearing 22 and the second bearing 23.

[0037] In one embodiment of the present invention, a sealing sleeve 4 is further included. The sealing sleeve 4 is sleeved on the outside of the axle 1. One end of the sealing sleeve 4 and the end of the bearing seat 21 near the shoulder 11 form a labyrinth-type sealing structure and abut against the end face of the inner ring of the first bearing 22. The other end of the sealing sleeve 4 abuts against the shoulder 11.

[0038] It should be noted that one end of the sealing sleeve 4 abuts against the end face of the inner ring of the first bearing 22, and the other end abuts against the shaft shoulder 11, so that the sealing sleeve 4 is fixed relative to the axle 1. The labyrinth seal structure can be obtained by multiple grooves and multiple protrusions with gap fit. The protrusions can move along the grooves to realize the relative rotation of the sealing sleeve 4 and the bearing seat 21.

[0039] It should be noted that the sealing sleeve 4 is fitted outside the wheel axle 1 and located between the bearing housing 21 and the shaft shoulder 11. One end of the sealing sleeve 4 along the axial direction of the wheel axle 1 forms a labyrinth-type sealing structure with the bearing housing 21, and the other end of the sealing sleeve 4 along the axial direction of the wheel axle 1 abuts against the shaft shoulder 11. This effectively prevents contaminants such as moisture and dust from the external environment from entering the bearing cavity, while also preventing the leakage of grease inside the lubrication cavity, thus greatly improving the sealing reliability and service life. At the same time, one end of the sealing sleeve 4 along the axial direction of the wheel axle 1 can also be provided with an abutting surface that abuts against the inner ring end face of the first bearing 22 to participate in the axial positioning of the bearing inner ring, thereby enhancing the overall rigidity and stability of the shaft system when subjected to lateral impact loads, and achieving a dual improvement in sealing performance and shaft system performance.

[0040] In one embodiment of the present invention, a first oil receiving tray 221 and a second oil receiving tray 231 are further included. The first oil receiving tray 221 is axially limited and installed in the bearing seat 21 on the side of the first bearing 22 near the spacer sleeve 24, and the second oil receiving tray 231 is axially limited and installed in the bearing seat 21 on the side of the second bearing 23 away from the spacer sleeve 24.

[0041] It should be noted that the first oil receiving tray 221 and the second oil receiving tray 231 can collect the lubricating oil flowing out of the bearing and guide it back to the bearing or store it in a specific area, thereby improving lubrication efficiency, reducing waste, and keeping the inside of the bearing housing clean.

[0042] Furthermore, the stepped structure formed in the inner cavity of the bearing housing 21 can limit the lower end of the first oil receiving pan 221, and the upper end of the first oil receiving pan 221 can abut against the lower end of the outer ring of the first bearing 22, so that the first oil receiving pan 221 is relatively fixed by the outer ring of the first bearing 22 and the bearing housing 21. Similarly, the stepped structure formed in the inner cavity of the bearing housing 21 can limit the axial movement of the outer ring of the second oil receiving pan 231.

[0043] In one embodiment of the present invention, a positioning sleeve 25 is further included. The positioning sleeve 25 is axially limited and installed in the bearing seat 21 and is located on the side of the second bearing 23 away from the second oil receiving pan 231. The spacer sleeve 24 is a variable diameter cylindrical structure, and its cylindrical diameter at the end facing the first bearing 22 is larger than that at the end facing the second bearing 23. The inner circular surface of the positioning sleeve 25 and the outer circular surface of the smaller cylindrical diameter end of the spacer sleeve 24 are in clearance fit.

[0044] It should be noted that by setting the locating sleeve 25 and making a clearance fit with the smaller diameter end of the variable-diameter spacer sleeve 24, crucial radial auxiliary positioning and support are provided for the spacer sleeve 24. This design effectively avoids radial runout or resonance that may occur when the slender spacer sleeve 24 rotates and bears complex loads, ensuring the long-term stability of the relative position between the bearing inner rings precisely set by the spacer sleeve 24. When the spacer sleeve 24 moves axially, the locating sleeve 25 also acts as an axial limiter of the spacer sleeve 24. This improves the overall stability and rigidity of the bearing assembly 2.

[0045] Furthermore, a first grease nipple is provided on the bearing seat 21 on the side of the first bearing 22 facing the shoulder 11, and a second grease nipple is provided on the bearing seat 21 on the side of the second bearing 23 facing the shoulder 11, for replenishing oil to the first bearing 22 and the second bearing 23 respectively during use. Therefore, the clearance fit between the inner circular surface of the positioning sleeve 25 and the outer circular surface of the smaller diameter end of the spacer sleeve 24 also allows oil to be replenished to the second bearing 23 through the second grease nipple, preventing the oil from flowing into the second bearing 23 too quickly. Instead, the oil flows into the second bearing 23 through the gap between the inner circular surface of the positioning sleeve 25 and the outer circular surface of the smaller diameter end of the spacer sleeve 24, thus providing sufficient lubrication to the second bearing 23.

[0046] Furthermore, the inner cavity of the bearing housing 21 has a stepped structure, which can axially limit the end of the positioning sleeve 25 facing the shaft shoulder 11, and the lower end of the positioning sleeve 25 abuts against the upper end of the outer ring of the second bearing 23. As above, the upper end of the first oil receiving pan 221 can abut against the lower end of the outer ring of the first bearing 22. Thus, the upper and lower ends of the outer ring of the bearing assembly 2 are axially limited and fixed. Of course, the inner cavity of the bearing housing 21 may also have a stepped structure for axially limiting the outer rings of the first bearing 22 and the second bearing 23. Alternatively, the outer ring of the bearing assembly 2 may be axially limited by other means.

[0047] In one embodiment of the present invention, the anti-loosening component 3 includes a first locking nut 31 and a second locking nut 33 that are threadedly connected to the axle 1 in sequence. The first locking nut 31 is axially pressed against the end face of the second oil receiving pan 231 away from the second bearing 23, and the second locking nut 33 is axially abutted against the end face of the first locking nut 31 away from the second bearing 23.

[0048] It should be noted that the first locking nut 31 is axially pressed against the end face of the second oil receiving pan 231 away from the second bearing 23, and the other end face of the second oil receiving pan 231 is correspondingly pressed against the end face of the inner ring of the second bearing 23. Therefore, the second oil receiving pan 231, the inner ring of the second bearing 23, and the axle 1 remain relatively fixed.

[0049] It should be noted that the first locking nut 31, as the main fastener, directly applies axial preload to the second oil receiving pan 231. This force is transmitted through the second oil receiving pan 231 to the inner ring of the second bearing 23, and finally acts on the entire bearing assembly 2 through the spacer sleeve 24, establishing a precise axial clearance or preload state. The second locking nut 33, as the auxiliary fastener, has the core function of tightening with greater torque, causing its end face to press against the first locking nut 31, generating a strong frictional torque, thereby effectively preventing the first locking nut 31 from loosening under vibration and impact. This design, with one main and one auxiliary fastener acting sequentially, ensures the efficient application and reliable maintenance of axial clamping force.

[0050] In one embodiment of the present invention, the anti-loosening component 3 further includes a washer 32, which is sandwiched between the first locking nut 31 and the second locking nut 33 and cooperates with the keyway of the wheel axle 1. The outer ring of the washer 32 is provided with a limiting flange.

[0051] It should be noted that the washer 32 and the wheel axle 1 are connected by a keyway, which prevents them from rotating relative to each other. At the same time, the limiting flange of the washer 32 can prevent relative rotation between the first locking nut 31 and the second locking nut 33, further ensuring the locking effect of the double nuts.

[0052] In one embodiment of the present invention, the anti-loosening component 3 further includes an anti-detachment cover 34, which is threadedly connected to the second end of the wheel axle 1.

[0053] It should be noted that the anti-loosening cover 34 is threaded onto the second end of the wheel axle 1, which can prevent the anti-loosening component 3 from falling off the shaft when it completely fails, thus playing a safety and security role.

[0054] Please see Figures 3-5 Secondly, the present invention provides a guide wheel, including the above-mentioned straddle-type monorail guide wheel shaft system assembly, and further including a horizontal wheel body 100 and an external support wheel 200. The horizontal wheel body 100 is mounted on the bearing seat 21 of the straddle-type monorail guide wheel shaft system assembly, and the external support wheel 200 is disposed at one end of the horizontal wheel body 100 near the anti-loosening component 3 and is connected to the rim flange of the horizontal wheel body 100.

[0055] It should be noted that, due to the adoption of the aforementioned straddle-type monorail guide wheel shaft system assembly, the rigidity of the "first bearing-spacer sleeve-second bearing" module is greatly improved, eliminating the risk of bearing inner ring tilting. Simultaneously, the anti-loosening component resists loosening caused by vibration. This ensures that regardless of changes in lateral force, the internal clearance of the bearing remains constant, allowing the bearing to always operate in its optimal design state. This guarantees that the guide wheel's positioning accuracy will never drift, and operational safety and stability are significantly improved.

[0056] In one embodiment of the present invention, the external support wheel 200 includes an integrally formed aluminum alloy wheel core 201 and a sealing cover 202. The sealing cover 202 is disposed on the second end of the wheel axle 1 and is provided with an observation window. The outer circular surface of the aluminum alloy wheel core 201 is vulcanized with a polyurethane coating.

[0057] It should be noted that the aluminum alloy wheel core 201 conforms to the lightweight design. At the same time, the aluminum alloy wheel core 201 and the sealing cover 202 are integrally formed, which simplifies the structural design, provides high strength and good sealing performance. The polyurethane coating provides elasticity and wear resistance, and reduces noise. The observation window facilitates the observation of the internal shaft system status.

[0058] Thirdly, the present invention provides a vehicle comprising the aforementioned straddle-type monorail guide wheel axle assembly, or comprising the aforementioned guide wheel.

[0059] The beneficial effects of the vehicle in this embodiment compared to the prior art are the same as those of the guide wheel described above, and will not be repeated here.

[0060] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A straddle-type monorail guide wheel axle assembly, characterized in that, include: A wheel axle (1), the first end of which is provided with a shoulder (11); The bearing assembly (2) includes a bearing housing (21), a first bearing (22), a second bearing (23), and a spacer sleeve (24). The spacer sleeve (24) is fitted onto the axle (1), and its two ends abut against the opposite end faces of the inner rings of the first bearing (22) and the second bearing (23), respectively. The bearing housing (21) is fitted onto the outside of the first bearing (22) and the second bearing (23) and is connected to the outer rings of the first bearing (22) and the second bearing (23). Anti-loosening component (3), the anti-loosening component (3) is connected to the second end of the wheel axle (1) and forms a press fit with the end of the inner ring of the second bearing (23) away from the spacer sleeve (24); The shoulder (11) and the inner ring of the first bearing (22) away from the spacer sleeve (24) form an axial limiting fit.

2. The straddle-type monorail guide wheel axle assembly according to claim 1, characterized in that, It also includes a sealing sleeve (4), which is fitted onto the axle (1). One end of the sealing sleeve (4) and the bearing seat (21) near the shoulder (11) form a labyrinth seal structure and abut against the end face of the inner ring of the first bearing (22). The other end of the sealing sleeve (4) abuts against the shoulder (11).

3. The straddle-type monorail guide wheel axle assembly according to claim 2, characterized in that, It also includes a first oil receiving tray (221) and a second oil receiving tray (231). The first oil receiving tray (221) is axially limited and installed in the bearing seat (21) of the first bearing (22) on the side close to the spacer sleeve (24). The second oil receiving tray (231) is axially limited and installed in the bearing seat (21) of the second bearing (23) on the side away from the spacer sleeve (24).

4. The straddle-type monorail guide wheel axle assembly according to claim 3, characterized in that, It also includes a positioning sleeve (25), which is axially limited and installed in the bearing seat (21) and located on the side of the second bearing (23) away from the second oil receiving plate (231); the spacer sleeve (24) is a variable diameter cylindrical structure, and its cylindrical diameter at the end facing the first bearing (22) is larger than that at the end facing the second bearing (23), and the inner circular surface of the positioning sleeve (25) and the outer circular surface of the smaller cylindrical diameter end of the spacer sleeve (24) are clearance fitted.

5. The straddle-type monorail guide wheel axle assembly according to claim 4, characterized in that, The anti-loosening component (3) includes a first locking nut (31) and a second locking nut (33) that are threaded onto the axle (1) in sequence. The first locking nut (31) is axially pressed against the end face of the second oil receiving pan (231) away from the second bearing (23).

6. The straddle-type monorail guide wheel axle assembly according to claim 5, characterized in that, The anti-loosening component (3) also includes a washer (32), which is sandwiched between the first locking nut (31) and the second locking nut (33) and cooperates with the keyway of the wheel axle (1). The outer ring of the washer (32) is provided with a limiting flange.

7. The straddle-type monorail guide wheel axle assembly according to claim 6, characterized in that, The anti-loosening component (3) also includes an anti-detachment cap (34), which is threadedly connected to the second end of the axle (1).

8. A guide wheel, characterized in that, The straddle-type monorail guide wheel axle assembly as described in any one of claims 1 to 7 further includes a horizontal wheel body (100) and an external support wheel (200), wherein the horizontal wheel body (100) is connected to the bearing seat (21) of the straddle-type monorail guide wheel axle assembly, and the external support wheel (200) is located at one end of the horizontal wheel body (100) near the anti-loosening component (3).

9. The guide wheel according to claim 8, characterized in that, The external support wheel (200) includes an integrally formed aluminum alloy wheel core (201) and a sealing cover (202). The sealing cover (202) is placed on the second end of the wheel axle (1) and is provided with an observation window. The outer surface of the aluminum alloy wheel core (201) is vulcanized with a polyurethane coating.

10. A vehicle, characterized in that, It includes the straddle-type monorail guide wheel axle assembly as described in any one of claims 1 to 7, or the guide wheel as described in any one of claims 8 or 9.

Images