Drive device applied to built-in trolley and built-in trolley

Abstract

The present application provides a drive device and an embedded bogie applicable to an embedded bogie. The drive device includes a gearbox (60) and a traction motor (50). The gearbox (60) includes a box body and a driving spiral bevel gear (61) and a driven spiral bevel gear (62) provided in the box body and meshing with each other. The driven spiral bevel gear is configured to be fixed to and externally fitted to the axle (40). The box body is configured to be attached to the axle via bearings (64, 65). The traction motor (50) includes a motor body and a motor output shaft (51). The motor body and the box body are arranged along the longitudinal direction of the bogie and are connected via a flange. The motor output shaft and the gearbox input shaft (63) are connected via a coupling. One end of the motor body away from the box body is configured to be connected to the cross beam of the bogie. Both opposite sides in the lateral direction of the motor body are configured to be connected to a pair of side beams (20) of the bogie by elastic suspensions. The drive device occupies less lateral space, and since the lateral size of the side beam is released, it can be designed more fully, the design structure becomes more reasonable, and the safety margin becomes more sufficient.

Description

Technical Field

[0001] [Cross-reference] This application claims the priority of a Chinese patent application with the application number 202211493794.0 and the title "Drive Device Applied to Built-in Bogie and Built-in Bogie", which was filed on November 25, 2022, and the entire content of which is incorporated herein by reference.

[0002] This application relates to the technical field of rail vehicles, and particularly to a drive device applied to a built-in bogie and a built-in bogie.

Background Art

[0003] Current built-in bogies have advantages such as reducing rail force, reducing rim wear, having a strong ability to adapt to line torsion, and small space occupied by the bogie, so they have become the advanced mainstream technology at home and abroad.

[0004] However, since the axle box is built in for this bogie, the distance between the side beams is significantly reduced. With the conventional parallel-axis transmission arrangement of the drive device, as the vehicle speed increases (especially at a speed level of 200 km / h or more), the power of the traction motor increases and the lateral width of the motor becomes larger, so the lateral width of the drive device cannot adapt to the built-in bogie.

[0005] In the prior art, there is a built-in bogie structure, but it often does not exceed a speed level of 200 km / h. Generally, by adopting measures such as reducing the distance between the side beam steel plates and simplifying the sealing structure with the axle box and bearings, the inner part of the side beam is expanded and the lateral arrangement space of the drive device is increased. However, when the motor power reaches 300 kW or more and the motor increases, it becomes difficult to realize the transmission arrangement of the drive device. Or, in order to reduce the lateral distance occupied by the coupling, the coupling is changed from the conventional input-end arrangement to the output-end arrangement. In this case, the outer diameter and weight of the coupling increase significantly, which is disadvantageous for the weight reduction of the drive device and the reduction of the center distance of the gearbox.

Summary of the Invention

Problems to be Solved by the Invention

[0006] This application provides a drive device applicable to an in-built bogie, which can reduce the lateral occupied space of the drive device, simplify the structure of the drive device, reduce the assembly mass of the drive device, and thus reduce the weight of the bogie.

[0007] This application further provides an in-built bogie.

Means for Solving the Problems

[0008] The drive device applicable to the in-built bogie according to this application is a gearbox including a box body and a driving spiral bevel gear and a driven spiral bevel gear provided in the box body and meshing with each other, wherein the driven spiral bevel gear is configured to be fixed to and externally fitted to an axle, and the box body is configured to be attached to the axle via a bearing, and a traction motor including a motor body and a motor output shaft, wherein the motor body and the box body are arranged along the longitudinal direction of the bogie and connected via a flange, the motor output shaft and the gearbox input shaft are connected via a coupling, one end of the motor body away from the box body is configured to be connected to a cross beam of the bogie, and both opposite lateral sides of the motor body are configured to be connected to a pair of side beams of the bogie by elastic suspensions.

[0009] Optionally, the motor output shaft and the gearbox input shaft are connected via a diaphragm coupling.

[0010] Optionally, the motor body and the box body are connected via a disc-shaped flange and fastened via evenly set flange bolts.

[0011] Optionally, one end of the motor body away from the box body is configured to be connected to the cross beam of the carriage via a lateral damper. One end of the lateral damper is connected to the end of the motor body, and the other end of the lateral damper is configured to be connected to the cross beam of the carriage.

[0012] Optionally, along the lateral direction of the motor body, a pair of motor mounting seats are respectively provided on two opposite side walls of the motor body. The pair of motor mounting seats are provided at intervals along the vertical direction of the side wall where they are located. The traction motor is configured to be elastically connected to the motor mounting seats and the side beam mounting seats of the carriage via a boom component.

[0013] Optionally, the boom component includes a boom bolt, a sleeve externally fitted on the boom bolt, and a pair of rubber pads externally fitted on the boom bolt and located at both ends of the sleeve. The boom bolt is inserted into the motor mounting seat and the side beam mounting seat, and each pair of the rubber pads is interposed between the upper and lower surfaces of the motor mounting seat and the side beam mounting seat.

[0014] Optionally, the motor body, the box body, and the spiral bevel gear are coaxially provided and are coaxial with the longitudinal axis of the carriage.

[0015] Optionally, the box body is located on both axial sides of the driven spiral bevel gear and is respectively connected to the axle via bearings. The bearing on one side is a pair of tapered bearings, and the bearing on the other side is a cylindrical bearing.

[0016] The present application further provides a built-in bogie, which is a built-in bogie including an architecture, a wheel pair, and a driving device applied to the above-mentioned built-in bogie. The box body is attached to the axle of the wheel pair through a bearing. One end of the motor body away from the box body is connected to the cross beam of the architecture. Both opposite sides in the lateral direction of the motor body are connected to a pair of side beams of the architecture by elastic suspensions.

[0017] Optionally, the wheel pair includes the axle, a pair of wheels located at both ends of the axle, and a pair of axle boxes provided on the axle and located inside the pair of wheels. The pair of axle boxes are connected to the ends of a pair of side beams of the architecture by a one-piece suspension.

Advantages of the Invention

[0018] For the driving device applied to the built-in bogie according to the embodiment of the present application, the motor body and the box body are arranged along the longitudinal direction of the bogie and connected through a flange, thereby occupying the longitudinal space of the bogie and saving the lateral space of the bogie. Since the longitudinal space of the bogie is sufficient and the lateral space is limited, in this embodiment, by arranging the traction motor and the gearbox in the longitudinal direction, the entire driving device occupies less lateral space, realizing the design needs of the axle box built-in bogie of high-speed vehicles and large-power vehicles. At the same time, since the lateral size of the side beam is released, it can be designed more fully, the design structure becomes more reasonable, and the safety margin can be made more sufficient. It reduces the increase in the volume of the motor body due to the increase in motor power, and the limitations of the center distance and reduction level of the gearbox.

[0019] In the following, in order to more clearly explain the technical solutions in the present application or the prior art, the drawings necessary for the description of the embodiments or the prior art will be briefly described. Of course, the drawings described below are only part of the embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative labor.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying out the Invention

[0021] Hereinafter, in order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described with reference to the drawings in the present application. Of course, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor shall fall within the protection scope of the present application.

[0022]

[0023] As shown in FIGS. 1 to 2, the present embodiment provides a drive device applied to a built-in carriage. The drive device includes a gearbox 60 and a traction motor 50 arranged along the longitudinal direction of the carriage.

[0024] ​Specifically, the gearbox 60 includes a box body, and a driving spiral bevel gear 61 and a driven spiral bevel gear 62 that are provided in the cavity of the box body and mesh with each other. By providing a pair of driving spiral bevel gear pairs, the two can be vertically transmitted, for example, the force transmission direction can be changed from the vertical direction to the horizontal direction, or from the horizontal direction to the vertical direction. The driven spiral bevel gear 62 is configured to be fixed to and externally fitted on the axle 40. Thereby, the rotation of the driven spiral bevel gear 62 rotates the axle 40 and further drives the wheel pair. In order to ensure that the box body can maintain relative rest when the wheel pair is running, the box body is configured to be attached to the axle 40 via a bearing. With this setting, when the axle 40 rotates, the box body remains stationary.

[0025] Note that the "vertical direction" referred to in this embodiment means the traveling direction of the bogie, that is, the length direction of the bogie, and the "horizontal direction" means the direction along the width direction of the bogie.

[0026] As shown in FIG. 5, specifically, the traction motor 50 includes a motor body and a motor output shaft 51 inserted into the motor body. The motor body and the box body are arranged along the vertical direction of the bogie and are connected via a flange. That is, the motor body and the box body are connected via a flange to form an integral structure. This integral structure is arranged along the vertical direction of the bogie, thereby occupying the vertical space of the bogie and saving the horizontal space of the bogie. Since the vertical space of the bogie is sufficient and the horizontal space is limited, in this embodiment, by arranging the traction motor 50 and the gearbox 60 in the vertical direction, the entire drive device occupies less horizontal space, realizing the design needs of the axle box built-in bogie of high-speed vehicles and large-power vehicles. At the same time, since the lateral size of the side beam 20 is released, it can be designed more fully, the design structure becomes more reasonable, and the safety margin becomes more sufficient. With the increase in the power of the motor, the increase in the volume of the motor body due to the increase in motor power, the center distance of the gearbox 60, and the limitation of the reduction level are reduced.

[0027] Furthermore, the motor output shaft 51 and the gearbox input shaft 63 are connected via a coupling, thereby transmitting the driving force of the traction motor 50 to the driving spiral bevel gear 61, and thereby rotationally driving the driving spiral bevel gear 61. The central axes of the motor output shaft 51 and the driving spiral bevel gear 61 of the present embodiment are provided coaxially and arranged along the vertical direction. The driven spiral bevel gear 62 and the driving spiral bevel gear 61 mesh vertically, so that the central axis of the driven spiral bevel gear 62 and the central axis of the driving spiral bevel gear 61 are set vertically and arranged in the horizontal direction. Furthermore, the central axis of the driven spiral bevel gear 62 and the central axis of the axle 40 are provided coaxially. The driven spiral bevel gear 62 is fixed to the axle 40 and externally fitted, and by being provided coaxially with the axle 40, the axle 40 can be successfully rotated synchronously, and torque can be transmitted to the wheel pair.

[0028] To facilitate the stable mounting of the traction motor 50, one end away from the box body of the motor body is configured to be connected to the cross beam 10 of the carriage. The opposite sides in the lateral direction of the motor body are configured to be connected to a pair of side beams 20 of the carriage by elastic suspensions, whereby both the end and both sides of the traction motor 50 are positioned, contributing to the reliable lifting of the traction motor 50. The mounting structure of the entire drive device is simple, facilitating the overall assembly, disassembly, inspection, and maintenance.

[0029] In one specific embodiment, as shown in FIG. 4, the motor output shaft 51 and the gearbox input shaft 63 are connected via a diaphragm coupling 90. The motor output shaft 51 and the gearbox input shaft 63 are connected via the diaphragm coupling 90. The diaphragm coupling 90 includes two diaphragms. One diaphragm is press-fitted onto the motor output shaft 51, and the other diaphragm is press-fitted onto the gearbox input shaft 63. There is a gap between the motor output shaft 51 and the gearbox input shaft 63. The two diaphragms are connected via bolts, which can eliminate the tolerance during the assembly of the motor output shaft 51 and the gearbox input shaft 63.

[0030] In one specific embodiment, as shown in FIGS. 3 and 5, the motor body and the box body are connected via a disc-shaped flange and fastened via evenly-set flange bolts 66. The ends of the motor body and the box body match in shape. The two are butted against each other and connected via the disc-shaped flange, ensuring easy combination of the two and high connection reliability.

[0031] In one specific embodiment, one end of the motor body away from the box body is configured to be connected to the cross beam 10 of the carriage via a lateral damper 80. One end of the lateral damper 80 is connected to the end of the motor body, and the other end of the lateral damper 80 is configured to be connected to the cross beam 10 of the carriage. By providing the lateral damper 80, on the one hand, it serves to connect the traction motor 50 and the cross beam 10, and on the other hand, it contributes to the lateral vibration damping between the traction motor 50 and the cross beam 10. By utilizing the attenuation of the lateral damper 80, the lateral vibration of the traction motor 50 is suppressed, and further, restrictions and controls are performed on the six degrees of freedom directions of the drive device assembly (gearbox 60 + traction motor 50).

[0032] In one specific embodiment, in order to facilitate the connection between the motor body and the side beam 20 of the carriage, along the lateral direction of the motor body, a pair of motor mounting seats 52 are respectively provided on two opposite side walls of the motor body. The pair of motor mounting seats 52 are provided at intervals along the vertical direction of the side wall where they are located. That is, on each side wall of the motor body, a pair of mounting seats provided at intervals in the vertical direction are provided. The traction motor 50 is configured to be elastically connected to the motor mounting seat 52 and the side beam mounting seat 21 of the carriage via the boom component 70. As can be understood, through holes are provided in both the motor mounting seat 52 and the side beam mounting seat 21 of the carriage. After overlapping the through holes of the motor mounting seat 52 and the side beam mounting seat 21 of the carriage, the boom component 70 can be used to pass through the through holes and tightened with nuts 74.

[0033] In one embodiment, each motor mounting seat 52 may include a pair of lugs provided at intervals. The interval between the pair of lugs matches the thickness of the side beam mounting seat 21. The side beam mounting seat 21 may be inserted between the pair of lugs. After overlapping the through holes of the pair of lugs and the through holes of the side beam mounting seat 21, the boom component 70 is used to pass through the through holes and tightened with nuts 74. Of course, each motor mounting seat 52 may be directly set on the side beam mounting seat 21. After overlapping the through holes of the motor mounting seat 52 and the through holes of the side beam mounting seat 21, the boom component 70 can be used to pass through the through holes and tightened with nuts 74.

[0034] As can be understood, the side beam mounting seat 21 is provided inside the side beam 20 and faces the motor mounting seat 52.

[0035] In one specific embodiment, the boom component 70 includes a boom bolt 71, a sleeve 72 externally fitted on the boom bolt 71, and a pair of rubber pads 73 externally fitted on the boom bolt 71 and located at both ends of the sleeve 72. The sleeve 72 is provided to facilitate separating the two pairs of rubber pads 73. Both ends of the sleeve 72 form bosses for receiving the rubber pads 73. The boom bolt 71 is inserted into the motor mounting seat 52 and the side beam mounting seat 21. Each pair of rubber pads 73 is interposed between the upper and lower surfaces of the motor mounting seat 52 and the side beam mounting seat 21, and a nut 74 is tightened, thereby interposing the two pairs of rubber pads 73 between the motor mounting seat 52 and the side beam mounting seat 21 respectively. On the one hand, suspension for the traction motor 50 is achieved. On the other hand, when vibration occurs in the traction motor 50, the rubber pads 73 can mitigate the vibration. Also, the traction motor 50 can be directly replaced without lifting the vehicle body. Since the suspension form is composed of two booms, the boom bolt 71 can be directly removed in the groove below the vehicle.

[0036] In one specific embodiment, the motor body, the motor output shaft 51, the box body, and the spiral bevel gear are provided coaxially and are coaxial with the longitudinal axis of the bogie. Thereby, the traction motor 50, the gearbox 60, and the bogie are completely centered and arranged along the longitudinal direction of the bogie. The drive device occupies less lateral space, thereby liberating the lateral space and facilitating the lateral arrangement of components such as the axle box body.

[0037] In one specific embodiment, the box body is located on both axial sides of the driven spiral bevel gear 62 and is respectively connected to the axle 40 via bearings. The bearing on one side is a pair of tapered bearings 64, and the bearing on the other side is a cylindrical bearing 65. By providing bearings on both sides of the box body, the mounting space of the driven spiral bevel gear 62 can be avoided, and the box body can also be firmly mounted on the axle 40.

[0038] On the other hand, the present application further provides a built-in bogie. Specifically, it includes an architecture, a wheel pair, and a driving device applied to the above-mentioned built-in bogie. The wheel pair and the architecture are connected via a journal box body. The box body is attached to the axle 40 of the wheel pair via a bearing. One end of the motor body away from the box body is connected to the cross beam 10 of the architecture. Both opposite lateral sides of the motor body are connected to a pair of side beams 20 of the architecture by elastic suspensions. By providing the above-mentioned driving device arranged along the longitudinal direction of the bogie, the lateral space between the pair of side beams 20 is liberated. As a result, the bearing of the journal box body has its arrangement space liberated, so that its lateral size can be increased, and a more reasonable and reliable lateral labyrinth design can be carried out.

[0039] In one specific embodiment, the wheel pair includes an axle 40, a pair of wheels 30 located at both ends of the axle 40, and a pair of journal box bodies provided on the axle 40 and located inside the pair of wheels 30, forming a form of built-in journal boxes. The pair of journal box bodies are connected to the ends of a pair of side beams 20 of the architecture by a one-stage suspension. By providing the above-mentioned driving device, the intervals among the wheels 30, the axle 40, and the architecture are increased, facilitating the completion and disassembly of the wheel pair and the architecture, and significantly increasing the convenience of inspection.

[0040] In addition, the gearbox 60 is provided with an oil injection hole, an oil discharge hole, and an oil level window, which are convenient for injecting lubricating oil, discharging excess oil, and observing the oil level.

[0041] However, the above embodiments are merely for explaining the technical means of the present application and do not limit it. Although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical means described in each of the above embodiments can still be modified or some technical features can be replaced with equivalent ones. And these modifications or replacements do not deviate from the essence of the corresponding technical means from the scope of the technical means of each embodiment of the present application.

Description of Symbols

[0042] 10: Cross beam 20: Side beam 21: Side beam mounting seat 30: Wheel 40: Axle 50: Traction motor 51: Motor output shaft 52: Motor mounting seat 60: Gearbox 61: Driving spiral bevel gear 62: Driven spiral bevel gear 63: Gearbox input shaft 64: Tapered bearing 65: Cylindrical bearing 66: Flange bolt 70: Boom component 71: Boom bolt 72: Sleeve 73: Rubber pad 74: Nut 80: Lateral damper 90: Diaphragm coupling.

Claims

1. A gearbox including a housing, and a driving spiral bevel gear and a driven spiral bevel gear provided in the housing and meshing with each other, wherein the driving spiral bevel gear is fixed to and externally fitted on a gearbox input shaft, the driven spiral bevel gear is configured to be fixed to and externally fitted on an axle, and the housing is configured to be attached to the axle via a bearing. A traction motor including a motor body and a motor output shaft, wherein the motor body and the housing are arranged along the longitudinal direction of the bogie and connected via a flange, the motor output shaft and the gearbox input shaft are connected via a coupling, one end of the motor body away from the housing is configured to be connected to a cross beam of the bogie, and both opposite lateral sides of the motor body are configured to be connected to a pair of side beams of the bogie by elastic suspensions. A driving device applied to a built-in bogie, characterized by including the above.

2. The driving device applied to the built-in bogie according to Claim 1, wherein the motor output shaft and the gearbox input shaft are connected via a diaphragm coupling 90. The driving device applied to the built-in bogie according to Claim 1.

3. The driving device applied to the built-in bogie according to Claim 1, wherein the motor body and the housing are connected via a disc-shaped flange and fastened via evenly set flange bolts. The driving device applied to the built-in bogie according to Claim 1.

4. The driving device applied to the built-in bogie according to Claim 1, wherein one end of the motor body away from the housing is configured to be connected to a cross beam of the bogie via a lateral damper, one end of the lateral damper is connected to an end of the motor body, and the other end of the lateral damper is configured to be connected to the cross beam of the bogie. The driving device applied to the built-in bogie according to Claim 1.

5. The driving device applied to the built-in bogie according to Claim 1, wherein along the lateral direction of the motor body, a pair of motor mounting seats are respectively provided on two opposite side walls of the motor body, the pair of motor mounting seats are provided at intervals along the vertical direction of the side wall where they are located, and the traction motor is configured to be elastically connected to the motor mounting seats and side beam mounting seats of the bogie via boom components. The driving device applied to the built-in bogie according to Claim 1.

6. The boom component includes a boom bolt, a sleeve externally fitted to the boom bolt, and rubber pads provided in pairs and positioned at both ends of the sleeve. The boom bolt is inserted into the motor mounting seat and the side beam mounting seat, and each pair of the rubber pads is interposed between the upper and lower surfaces of the motor mounting seat and the side beam mounting seat. A driving device applied to the built-in carriage according to claim 5.

7. The motor body, the box body, and the spiral bevel gear are coaxially provided and are coaxial with the longitudinal axis of the carriage. A driving device applied to the built-in carriage according to any one of claims 1 to 6.

8. The box body is located on both axial sides of the driven spiral bevel gear and is respectively connected to the axle through bearings. One of the bearings on one side is a pair of tapered bearings, and the bearing on the other side is a cylindrical bearing. A driving device applied to the built-in carriage according to claim 7.

9. A built-in carriage including an architecture, a wheel pair, and a driving device applied to the built-in carriage according to any one of claims 1 to 8. The box body is attached to the axle of the wheel pair through a bearing. One end of the motor body away from the box body is connected to the cross beam of the architecture, and both opposite lateral sides of the motor body are connected to a pair of side beams of the architecture by elastic suspensions.

10. The wheel pair includes an axle, a pair of wheels positioned at both ends of the axle, and a pair of axle boxes provided on the axle and positioned inside the pair of wheels. The pair of axle boxes are connected to the ends of a pair of side beams of the architecture by a one-piece suspension. The built-in carriage according to claim 9.

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