A straddle-type monorail train bogie using a suspended coupling gearbox

Abstract

The present invention relates to a straddle-type monorail train bogie using a suspended gearbox. The bogie comprises a gearbox assembly, a gearbox spring suspension system assembly, and a small bevel gear and bearing seat assembly. The gearbox of the gearbox assembly and the monorail train bogie are connected in a suspended manner. The gearbox spring suspension system assembly is suspended on the gearbox assembly via a spring end cover on the outer side of the gearbox main shaft. The small bevel gear and bearing seat assembly is connected to the gearbox assembly by meshing with a large bevel gear in the gearbox. The technical problem to be solved by the present invention is how to reliably connect the monorail train axle and the gearbox output shaft within the limited axial space of the monorail train bogie, achieve high transmission efficiency, and operate smoothly. The goal is to design a straddle-type monorail train bogie gearbox with high transmission efficiency, safety, and reliability.

Description

Technical Field

[0001] The present invention relates to a bogie for a rail vehicle, specifically a straddle-type monorail bogie with double-arm supports and a lower-mounted wheel axle. The invention aims to solve the problem of rapid wheel and bearing replacement in existing straddle-type monorail train bogies, and at the same time solve the difficult problem of connecting the newly invented simply supported axle with the original gearbox output shaft. Background Art

[0002] A monorail is a railway system with only one track. A straddled monorail is a strip-shaped beam on which vehicles ride astride. The advantages of monorail vehicles include low noise, a small turning radius, strong gradeability, low construction costs, and extremely flexible routes. They are well adapted to the natural conditions of mountainous cities and provide convenience for people's lives. As a type of urban rail transit, straddled monorails have a large passenger capacity and high safety requirements, necessitating the design of more reliable transmission and braking systems to ensure the smooth and safe operation of the monorail. The relatively complex structure and limited axial clearance of straddled monorail bogies present challenges in connecting the axles and gearbox output shafts. Striving to maximize transmission efficiency while utilizing the limited axial clearance of the bogie has become a goal in designing monorail bogie transmission systems. Therefore, the present invention designs a straddled monorail bogie that utilizes a suspended coupling gearbox. Summary of the Invention

[0003] The technical problem to be solved by the present invention is how to connect the monorail train axle with the original gearbox output shaft reliably within the limited axial space of the monorail train bogie, thereby realizing the design of a double-arm supported, bottom-mounted axle straddle-type monorail train bogie, thereby improving the efficiency of rapid wheel changing.

[0004] The present invention designs a suspended connection type monorail train gearbox, which has high transmission efficiency and stable operation; and solves the problem of achieving connection between the axle and the gearbox output shaft within a limited axial space.

[0005] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0006] A straddle-type monorail train bogie utilizing a suspended gearbox connection, comprising: a gearbox assembly, a gearbox spring suspension system assembly, and a small bevel gear and bearing seat assembly; the gearbox of the gearbox assembly and the monorail train bogie are connected by a suspended connection; the gearbox spring suspension system assembly is suspended on the gearbox assembly via a spring end cap on the outer side of the gearbox main shaft; the small bevel gear and bearing seat assembly is connected to the gearbox assembly by meshing with a large bevel gear in the gearbox;

[0007] The gearbox spring suspension system assembly includes: a gearbox floating wire rope spring suspension, a wire rope shock absorber, a torque block and rubber pad assembly, a wire rope spring support plate and a spring end cover on the outer side of the gearbox main shaft.

[0008] The function of the gearbox spring suspension system assembly is to buffer the gearbox vibration caused by the axial runout caused by the axial deviation between the axle and the gearbox output shaft due to the gearbox suspension, relieve the excessive radial force between the axle and the gearbox output shaft, and reduce the rotational resistance.

[0009] Furthermore, the wire rope buffer is installed on both sides of the wire rope spring support plate by bolt connection, and the gear box main shaft outer spring end cover and the gear box floating wire rope spring hanger are installed on both sides of the wire rope spring support plate; the torque stop block and the rubber pad assembly are installed above the wire rope spring support plate by bolt connection.

[0010] Furthermore, the wire rope buffer includes: left and right springs of the wire rope shock absorber and two wire rope shock absorber connecting plates. The left and right springs of the wire rope shock absorber are installed between the two wire rope shock absorber connecting plates to buffer the vibration generated by the gearbox during operation, reduce the increase in radial force on the axle due to the suspended connection of the gearbox, and avoid axle fatigue caused by the floating of the gearbox.

[0011] Furthermore, the torque block and rubber pad assembly includes: a rubber pad and a torque block. The torque block, rubber pad assembly and torque shift rod together limit the freedom of movement of the gearbox, thereby limiting the swing of the gearbox; the torque shift rod is welded to the bogie.

[0012] Furthermore, a suspended connection is adopted between the gearbox and the monorail train bogie, which is achieved through a spline connection between the solid axle and the gearbox output shaft, namely the spline hub shaft; the purpose of this connection method is to reduce the use of axial space and eliminate the influence caused by coaxiality error, so as to achieve rapid wheel changing.

[0013] Furthermore, the wire rope shock absorber is supported on a wire rope spring buffer bracket installed on the bogie, and the two cooperate to bear the weight of the gear box, reduce the radial force on the right end of the solid axle, and alleviate axle fatigue.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The gearbox and bogie are connected in a suspended manner, which solves the problem of difficult connection between the axle and the gearbox output shaft, reduces the axial space occupied, makes more reasonable use of the axial space of the bogie, and also improves the service life of the bearings and axles. The reduction in the use of axial space also realizes the purpose of disassembly and assembly of the axle from the bottom, thereby realizing rapid wheel changing.

[0016] 2. Since the gearbox is suspended, its own weight easily increases the radial load of the axle. The wire rope spring assembly designed in the present invention can effectively bear the gearbox's own weight, relieve axle fatigue, and extend the service life of the axle and bearings.

[0017] 3. The present invention limits the freedom of the gearbox by designing a torque lever and a torque block welded to the frame, thereby limiting the movement of the gearbox and ensuring the smooth operation of the bogie. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings:

[0019] Figure 1 The present invention is a working principle diagram of a bogie using a suspended gearbox;

[0020] Figure 2 This is a schematic diagram of the installation principle of the suspended gearbox of the present invention installed on the bogie;

[0021] Figure 3 This is a partial view of the suspended gearbox of the present invention installed on the vehicle frame;

[0022] Figure 4 This is a schematic diagram of the suspension gearbox of the present invention being connected to the vehicle frame via a solid axle;

[0023] Figure 5 This is an overall axonometric view of the gearbox of the double-arm-supported straddle-type monorail train bogie with a suspended connection according to the present invention;

[0024] Figure 6 This is an axonometric view of the gearbox spring suspension system assembly of the present invention;

[0025] Figure 7 This is a parts diagram of the wire rope spring support plate of the present invention;

[0026] Figure 8 It is a parts drawing of the torque stop and rubber pad assembly according to the present invention;

[0027] Figure 9 It is a parts diagram of the wire rope buffer according to the present invention;

[0028] Figure 10 This is a parts diagram of the outer spring end cover of the main shaft of the gear box according to the present invention;

[0029] Figure 11 This is a diagram of the gearbox floating wire rope spring suspension parts of the present invention;

[0030] Figure 12 This is an axonometric view of the bogie equipped with the suspended gearbox according to the present invention;

[0031] Figure 13 is an axonometric view of the solid axle of the present invention;

[0032] Figure 14 This is an axonometric view of the spline hub shaft of the present invention;

[0033] Figure 15 is a cross-sectional view of the suspended gearbox of the present invention when installed on a vehicle frame;

[0034] Figure 16 — Figure 17 This is a force analysis diagram of the device of the present invention during use.

[0035] Figure: 1. Gearbox spring suspension system assembly, 2. Small bevel gear and bearing seat assembly, 3. Gearbox floating wire rope spring suspension, 4. Wire rope buffer, 5. Torque stop and rubber pad assembly, 6. Wire rope spring support plate, 7. Gearbox main shaft outer spring end cover, 8. Rubber pad, 9. Torque stop, 10. Left-handed wire rope buffer spring, 11. Wire rope buffer connecting plate, 12. Right-handed wire rope buffer spring, 13. Torque lever, 14. Wire rope spring buffer bracket, 15. Bogie frame assembly, 16. Solid axle, 17. Splined hub shaft, 18. Bogie axle lower pinch shoe, 19. Axle head pressure cap, 20. Tensioning screw

[0036] a. Solid axle, b. Tensioning screw and shaft gland, c. Tapered ball bearing, d. Gooseneck ride support arm, e. Rubber tire and rim, f. Drive train (drive motor and flexible coupling, active bevel gear, passive bevel gear, and secondary reduction gear), g. Output gear spline hub shaft (spline-connected to the right end of the solid axle), h. Gearbox housing.

[0037] i. Bogie, j. Torque lever welded to bogie, k. Torque lever, l. Torque stop, m. Wire rope spring, n. Gearbox wire rope spring bracket, o. Gearbox (floating link). DETAILED DESCRIPTION

[0038] The present invention provides a suspended straddle-type monorail train bogie gearbox assembly, which is used to improve the existing monorail train bogie's unstable operation and excessive axial space occupied by the transmission system, so as to make the monorail train run more smoothly and reliably.

[0039] The suspended-connected straddle-type monorail train bogie gearbox mainly consists of two parts: a gearbox spring suspension system assembly 1 and a small bevel gear and bearing seat assembly 2; the gearbox is connected to the spline hub shaft 17 inside the gearbox through the spline on the solid axle 16.

[0040] The axle and gearbox output shaft are splined together, and the gearbox and bogie are connected using a floating connection. That is, the gearbox is connected only to the splines on the splined hub shaft and the solid axle. Due to axial runout between the axle and the splined hub shaft, the axle alone bearing the gearbox's deadweight will also generate a certain amount of inertial force, causing axle fatigue during operation and shortening the axle's service life. Therefore, a gearbox spring suspension system assembly 1 is designed to bear the gearbox's deadweight, reduce the radial force borne by the right end of the solid axle, and alleviate axle fatigue. The gearbox spring suspension system assembly 1 consists of a gearbox floating wire rope spring suspension 3, a wire rope buffer 4, a torque block and rubber pad assembly 5, a wire rope spring support plate 6, and a gearbox main shaft outer spring end cap 7. The wire rope buffer 4 consists of a wire rope buffer coupling plate 11, a left-handed wire rope buffer spring 10, and a right-handed wire rope buffer spring 12. The wire rope spring buffer is supported on a wire rope spring buffer bracket mounted on the bogie, bearing the weight of the gearbox. When the bogie is operating, the rotation of the gears within the gearbox causes the gearbox housing to rotate in the opposite direction. Due to the suspended connection, the gearbox housing may shift during operation. A torque lever 13 welded to the bogie and a torque stop 9 mounted on the wire rope spring support plate limit the gearbox's freedom of movement, ensuring smooth bogie operation and extending the service life of the gearbox and axle.

[0041] The present invention will be further described below with reference to the accompanying drawings:

[0042] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of the present invention, rather than all of the embodiments. The embodiments listed below are only for further understanding and implementation of the technical solution of the present invention, and do not constitute further limitations on the claims of the present invention. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components, and it can be a flexible connection, a rigid connection, or a movable link. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Figure 1 , a diagram showing the operating principle of a monorail train bogie equipped with a suspended gearbox according to the present invention; there is no rigid connection between the gearbox and the bogie. To reduce axial space, the gearbox and bogie are connected only by splines between a solid axle and a splined hub shaft. No coupling is used between the axle and the gearbox output shaft. Due to coaxiality errors between the axle and the gearbox output shaft, the operating torque increases and the life of the axle and bearings is affected. Therefore, a suspended connection is adopted between the gearbox and the bogie to solve the problem caused by excessive coaxiality errors.

[0044] See Figure 2 , which is a schematic diagram of the suspended gearbox of the present invention installed on a monorail train bogie; due to the suspended connection, the gearbox's own weight increases the radial force borne by the axle (outer right end), causing axle fatigue; a wire rope spring buffer device is designed on the gearbox and cooperates with the wire rope spring bracket installed on the bogie to bear the gearbox's own weight, thereby reducing the radial force borne by the axle and alleviating axle fatigue; due to the suspended connection, when the bogie is in operation, the rotation of the gears in the gearbox causes the gearbox housing to rotate in the opposite direction. Therefore, a torque lever welded to the bogie is designed to cooperate with a torque block to limit the rotation of the gearbox housing, ensuring smooth operation of the gearbox;

[0045] See Figure 3 , is an axonometric view of the suspended gearbox mounted on the bogie and solid axle;

[0046] See Figure 4 , which is a partial view of the gearbox and axle connected by splines, and the wire rope spring bracket and wire rope buffer;

[0047] See Figure 5 The gearbox assembly of the suspended straddle-type monorail train bogie is mainly composed of two parts: the gearbox spring suspension system assembly 1 and the gearbox small bevel gear and bearing seat assembly 2. The gearbox spring suspension system assembly 1 is suspended on the gearbox assembly through the spring end cover on the outer side of the gearbox main shaft; the small bevel gear and bearing seat assembly is connected to the gearbox assembly by meshing with the large bevel gear in the gearbox.

[0048] See Figure 6 , is an axonometric view of the gearbox spring suspension system assembly 1 of the present invention; the gearbox spring suspension system assembly 1 is intended to cushion the gearbox vibration caused by axial runout due to the axial deviation between the axle and the gearbox output shaft caused by the gearbox suspension, thereby ensuring smooth bogie operation. The gearbox spring suspension system assembly 1 consists of a wire rope buffer 4, a torque block and rubber pad assembly 5, a wire rope spring support plate 6, a gearbox main shaft outer spring end cover 7, and a gearbox floating wire rope spring suspension 3. The wire rope buffer 4 is bolted to both sides of the wire rope spring support plate 6; the gearbox main shaft outer spring end cover 7 and the gearbox floating wire rope spring suspension 3 are mounted on both sides of the gearbox spring suspension system assembly 1; the torque block is bolted to the top of the wire rope spring support plate 6.

[0049] See Figure 8 , is a schematic diagram of the torque stop assembly of the present invention, the torque stop assembly is composed of a rubber pad 8 and a torque stop 9, the rubber pad mainly plays the role of buffering and shock absorption;

[0050] See Figure 9 , is an axonometric view of the wire rope buffer assembly according to the present invention, in which the left-handed wire rope buffer spring 10 and the right-handed wire rope buffer spring 12 are installed between two wire rope buffer connecting plates 11.

[0051] See Figure 12 , is a schematic diagram of the bogie assembly according to the present invention, wherein the torque lever 13 is connected to the frame by welding; when the bogie is running, the freedom of movement of the gearbox is restricted, thereby ensuring the smooth operation of the bogie; the wire rope spring buffer bracket 14 is installed on the bogie to support the wire rope spring buffer and bear the weight of the gearbox; by designing the bogie axle lower pinch shoe 18, the axle can be removed, thereby completing quick wheel changing and saving wheel changing time.

[0052] See Figure 13 , which is an axle-view of the solid axle of the present invention. A spline is provided at the right end of the solid axle for connecting with the spline hub shaft of the gearbox; there are a shaft head cover 19 and a tensioning screw 20 inside the axle.

[0053] See Figure 16 —17 is a force analysis diagram of the suspended gearbox of the present invention during operation; during the operation of the bogie, the wire rope spring will be subjected to force from the Z direction and inertia force from the X direction; the torque lever and the torque block are mainly subjected to reaction force from the Y direction; since the gearbox will generate reaction torque during operation, the wire rope spring, the torque block and the torque lever together ensure the smooth operation of the gearbox.

[0054] Working principle:

[0055] When the bogie is operating, power is output from the traction motor's output shaft, input through the pinion bevel gear and bearing seat assembly, and then into the gearbox assembly. The gearbox output shaft (splined hub shaft) is connected to the solid axle only via splines, transmitting power directly from the gearbox output shaft to the solid axle. The gearbox spring suspension system assembly 1 supports the gearbox's deadweight, preventing excessive radial forces on the right end of the axle, which could cause axle fatigue. Simultaneously, the torque block and torque lever limit the gearbox's freedom of movement, ensuring smooth bogie operation. The gearbox is designed as a suspended support structure to address the connection between the axle and the gearbox output shaft when axial space is insufficient. This allows for quick assembly and disassembly of the axle by removing the lower axle bushing on the bogie. Furthermore, to ensure the longevity of the axle and bearings, a wire rope spring bracket and wire rope buffer are designed on the bogie to mitigate axle fatigue caused by the suspended gearbox connection.

[0056] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and exemplary embodiments. They can be applied to a variety of fields suitable for the present invention. Further modifications will be readily apparent to those skilled in the art. Therefore, the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

1. A straddle-type monorail train bogie using a suspended coupling gearbox, characterized in that: include: A gearbox assembly, a gearbox spring suspension system assembly, and a small bevel gear and bearing seat assembly, wherein the gearbox of the gearbox assembly and the monorail bogie are connected in a suspended manner, wherein the suspended connection is achieved through a spline connection between the axle and the gearbox output shaft, i.e., the spline hub shaft; the gearbox spring suspension system assembly is suspended on the gearbox assembly via a spring end cover on the outer side of the gearbox main shaft; the small bevel gear and bearing seat assembly is connected to the gearbox assembly via the small bevel gear meshing with the large bevel gear in the gearbox; The gearbox spring suspension system assembly includes: a gearbox floating wire rope spring suspension, a wire rope buffer, a torque block and rubber pad assembly, a wire rope spring support plate, and a gearbox main shaft outer spring end cover; the wire rope buffer is installed on both sides of the wire rope spring support plate by bolt connection, and the gearbox main shaft outer spring end cover and the gearbox floating wire rope spring suspension are installed on both sides of the wire rope spring support plate; the torque block and rubber pad assembly are installed above the wire rope spring support plate by bolt connection; The wire rope buffer includes left and right wire rope buffer springs and two wire rope buffer connecting plates. The left and right wire rope buffer springs are installed between the two wire rope buffer connecting plates to buffer the vibration generated by the gearbox during operation, reduce the increase in radial force on the axle due to the floating connection of the gearbox, and avoid axle fatigue caused by the floating of the gearbox. The torque block and rubber pad assembly includes a rubber pad and a torque block. The torque block, rubber pad and torque shift rod together limit the freedom of movement of the gear box, thereby limiting the swing of the gear box. The torque shift rod is welded to the bogie.

2. A straddle-type monorail train bogie using a suspended coupling gearbox according to claim 1, characterized in that: The function of the gearbox spring suspension system assembly is to buffer the gearbox vibration caused by axial runout due to the axial deviation between the axle and the gearbox output shaft due to gearbox suspension, alleviate the excessive radial force between the axle and the gearbox output shaft, and reduce the rotational resistance.

3. The straddle-type monorail train bogie using a suspended coupling gearbox according to claim 1, characterized in that: The purpose of adopting a suspended connection between the gear box and the monorail train bogie is to reduce the use of axial space and eliminate the influence caused by coaxiality error, so as to achieve rapid wheel changing.

4. The straddle-type monorail train bogie using a suspended coupling gearbox according to claim 1, characterized in that: The wire rope buffer is supported on a wire rope spring buffer bracket installed on the bogie. The two cooperate to bear the weight of the gear box, reduce the radial force on the right end of the solid axle, and alleviate axle fatigue.

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