Bogie design method, bogie and miniature overhead rack sightseeing train system

Abstract

The present invention discloses a bogie design method and a bogie and a miniature overhead rack rail sightseeing train system, wherein the bogie design method is to adopt an overhead straddle design for the bogie, the bogie adopts a single traction rod to transmit longitudinal traction and braking force, the single traction rod is arranged at a position on one side of the bogie, so that the traction point of the bogie is located at the side of the bogie, the driving gear of the bogie is also arranged at a position on one side of the bogie, so that the meshing driving point between the driving gear and the rack rail is also located at the side of the bogie, and the traction point and the driving point are located at the same side position; the position of the traction point is moved down to shorten the distance between the traction point and the driving point. The bogie designed by the present invention can not only meet the needs of a miniature overhead rack rail sightseeing train, but also reduce the axle weight transfer rate, improve the adhesion performance of the wheel axle, give full play to the efficiency of traction, and avoid idling of the wheel axle and overturning of the carriage.

Description

Technical Field

[0001] The invention relates to a bogie design method for a miniature overhead rack rail sightseeing train, a bogie manufactured by using the design method, and a miniature overhead rack rail sightseeing train system including the bogie, and relates to the technical field of manufacturing equipment for overhead rack rail sightseeing trains. Background Art

[0002] A rack railway based on gear transmission is a mountain railway that replaces the laying of lines and long tunnels in areas with steep natural slopes in mountainous areas. The actual steepest slope of ordinary rail railways in the world is 70‰, and the maximum slope of rack railways has reached 480‰. The main design concept of rack railways is that a special rack is placed on the sleepers in the middle of ordinary rails. The locomotive running on the rack railway is equipped with one or more gears that mesh with the rack to run, so that the locomotive can overcome the problem of insufficient adhesion. The climbing ability of the rack railway is not as good as that of the cable railway, but it can be built into longer or more complex routes.

[0003] An overhead straddle-type monorail train is a railway train that is supported, stabilized and guided by a single track, with the train body straddling the track beam. Compared with traditional double-track trains, overhead straddle-type trains have many advantages such as strong adaptability, low noise, small turning radius, and very strong climbing ability. An overhead sightseeing train based on gear transmission is a type of overhead straddle-type monorail train.

[0004] One of the problems in bogie design is the large axle load transfer rate. Axle load transfer refers to the change in axle load formed when the train is in traction condition. Axle load transfer will occur in all trains under traction conditions. Figure 1 As shown, let the length direction (longitudinal direction) of the carriage 1 be X, let the width direction (lateral direction) of the carriage 1 be Y, and let the height direction (vertical direction) of the carriage 1 be Z. Under certain traction operation conditions, assuming that part of the axle weight of the bottom axle 1 2 of the carriage 1 is transferred to the bottom axle 2 3, when the axle weight transfer rate is relatively large, the bogie will generate a large rotational overturning moment around the Y axis under the action of traction or braking force, thereby causing the risk of overturning of the carriage. In addition, the running wheels on the axle 2 3 will be overloaded. Therefore, great attention has been paid to the axle weight transfer under the action of traction at home and abroad.

[0005] The applicant has developed a miniature overhead rack rail sightseeing train. This miniature overhead rack rail sightseeing train is a small overhead straddle-type monorail train with a maximum line slope of 500‰, a minimum flat curve radius of 10m, and a maximum train speed of 30km / h. It is an overhead sightseeing car amusement machine with the characteristics of simple structure, light weight and low cost. In view of the characteristics of the miniature overhead rack rail sightseeing train as a small mountain climbing rack rail train, the bogie designed for it needs to take into account both the characteristics of the miniature overhead rack rail sightseeing train and the axle weight transfer rate.

[0006] The following relevant patent documents were retrieved:

[0007] A Chinese utility model patent with authorization announcement number CN208069658U and authorization announcement date of November 9, 2018 discloses a dual-mode drive bogie for a straddle-type monorail train that can adapt to extremely large slopes, including a frame and two pairs of running wheels and drive motors mounted thereon, the running wheels using the top surface of a concrete track beam as a running surface, a second drive motor and a rack gear driven thereby are fixedly arranged on the frame, a rack is fixedly arranged on the concrete track beam, and the rack gear is meshed with the upper tooth groove of the rack.

[0008] After reading, it is found that the bogies in the above patent documents are neither suitable for miniature overhead rack rail sightseeing trains nor take into account the problem of reducing the axle load transfer rate.

[0009] In summary, how to propose a bogie design method for a miniature overhead rack sightseeing train so that the designed bogie can not only meet the needs of the miniature overhead rack sightseeing train but also reduce the axle load transfer rate is a technical problem that needs to be solved urgently. Summary of the invention

[0010] One of the technical problems to be solved by the present invention is to provide a bogie design method for a miniature overhead rack railway sightseeing train in view of the defects existing in the prior art. The designed bogie can not only meet the needs of the miniature overhead rack railway sightseeing train, but also reduce the axle weight transfer rate, avoid the risk of overturning of the carriage and avoid excessive load on the running wheels on a certain axle of the bogie, thereby improving safety.

[0011] In order to solve the above technical problems, the technical solution adopted by the present invention is: a bogie design method, the bogie adopts an overhead straddle design, the bogie adopts a single traction rod to transmit longitudinal traction and braking force, the single traction rod is set at a position on one side of the bogie, so that the traction point of the bogie is located on the side of the bogie, and the driving gear of the bogie is also set at a position on one side of the bogie, so that the meshing driving point between the driving gear and the rack is also located on the side of the bogie, and the traction point and the driving point are located on the same side; the position of the traction point is lowered to shorten the distance between the traction point and the driving point.

[0012] Preferably, after the bogie is placed on the track, the central axis of the wheel axle of the running wheel is set to B1, and the central waistline position of the track is set to B2;

[0013] The said lowering of the traction point and shortening of the distance between the traction point and the driving point means setting the traction point and the driving point between the axle center axis B1 and the track center waistline B2 with the traction point at the upper position and the driving point at the lower position.

[0014] The present invention also discloses a bogie designed according to the bogie design method as described above, wherein the bogie comprises a bogie frame and a gear drive device, a running wheel, a secondary suspension device, a traction rod, a guide wheel component and a stabilizing wheel component arranged on the bogie frame, the bogie frame comprises an inverted U-shaped frame body, the gear drive device comprises a motor, the motor is arranged on one side of the frame body, the drive gear is arranged on the output shaft of the motor, and the meshing drive point is the meshing point between the drive gear and the rack;

[0015] One end of the traction rod is hinged to one side of the inverted U-shaped frame, and the traction point is the hinge point between one end of the traction rod and one side of the inverted U-shaped frame.

[0016] Preferably, the running wheels include running wheel one and running wheel two, running wheel one and running wheel two are rotatably connected to the middle position of the top surface of the frame, and running wheel one and running wheel two are arranged in sequence along the length direction of the track.

[0017] Preferably, the guide wheel assembly and the stabilizing wheel assembly both include a wheel body support, a solid wheel rotatably connected to the wheel body support, and a rubber stopper connected to the wheel body support, and the wheel body support is rotatably connected to the frame of the bogie frame.

[0018] Preferably, a safety wheel is rotatably connected to one side of the inverted U-shaped frame, and the safety wheel is located below the rack, with a gap between the safety wheel and the rack.

[0019] The present invention also discloses a miniature overhead rack rail sightseeing train system, comprising a track and a miniature overhead rack rail sightseeing train running on the track, wherein the bogie as described above is arranged at the bottom of the carriage of the miniature overhead rack rail sightseeing train.

[0020] Preferably, a plurality of rack-rail connection points are provided on one side of the track along the length direction of the track, a track extension is provided at each rack-rail connection point, one end of the track extension is fixedly connected to the track, a vibration damping member is provided on the other end of the track extension, the rack is provided on the vibration damping member, the rack and the track extension are isolated from each other by the vibration damping member, the rack, the vibration damping member and the track extension are locked and connected together by the rack-rail connection member, thereby connecting the rack to one side of the track.

[0021] Preferably, the track extension member is a pipe fitting, which is arranged horizontally, and one end of the metal pipe fitting is fixed to the track; the vibration damping member includes a rubber sleeve arranged on the rack rail, and a plurality of rack rail through holes are opened on the side of the rack rail along the length direction of the rack rail, and a rubber sleeve is arranged in each rack rail through hole, and the vibration damping member also includes a rubber gasket 1 and a rubber gasket 2; the rack rail connecting member includes a screw 1, a nut 1, a metal gasket 1 and a metal gasket 2;

[0022] The rack is connected to one side of the track by using screw 1 which passes through metal gasket 1, rubber gasket 1, rubber sleeve on the rack, rubber gasket 2, metal gasket 2 and the inner hole of the pipe fitting in sequence and then locked with nut 1.

[0023] Preferably, the track comprises an upper track, a lower track and a support rod disposed between the upper track and the lower track; one end of the metal pipe is fixedly connected to one side of the support rod.

[0024] The technical effect of the present invention is that the bogie in the present invention adopts a single traction rod structure and through the layout design of the traction point and the driving point on the bogie, the bogie designed by the present invention not only saves design space, is suitable for a miniature overhead rack rail sightseeing train, but also reduces the axle load transfer rate, avoids the bogie rotating and overturning around the Y axis, thereby avoiding the risk of the carriage overturning and avoiding the running wheel on a certain wheel axle on the bogie from being overloaded, thereby improving safety. In addition, arranging the traction point and the driving point on the same side of the bogie is conducive to reducing the rotation torque of the bogie around the Z axis caused by the traction force or the braking force, thereby reducing the force on the guide wheel and further improving safety. By setting a reasonable position between the traction point and the driving point, the axle load transfer rate can be further reduced while meeting the design requirements of a small overhead straddle-type monorail train. By designing the structural layout position between the components of the bogie, the structure of the entire bogie is simplified, making the layout between the components of the bogie more compact. By further arranging a vibration damping member between the rack and the track, it is equivalent to an elastic connection structure between the rack and the track, while in the prior art, the rack and the track are a rigid connection structure. Therefore, in the present invention, during the operation of the train, when the driving gear and the rack mesh and transmit and generate vibration, since the rack and the track extension are isolated from each other by the vibration damping member, the vibration transmitted from the rack can be blocked and damped by the vibration damping member, thereby greatly reducing the vibration energy transmitted from the rack to the track, making it impossible for the track to resonate with the rack and pinion, and ultimately reducing the noise emitted by the overhead rack train during operation, reducing the harm caused by the noise to people's physical and psychological health, and reducing the impact of the noise on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of a train carriage when it is running on the track;

[0026] Figure 2 It is a partial front view structural diagram of a miniature overhead rack railway train in the first embodiment of the present invention when it is running on the track;

[0027] Figure 3 Schematic diagram of the three-dimensional structure of the bogie in the first embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the front structural view of a bogie in Embodiment 1 of the present invention;

[0029] Figure 5 The three-dimensional structure of the bogie frame of the bogie in the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 6 The three-dimensional structure of the bogie frame of the bogie in the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0031] Figure 7 It is a schematic diagram of the front view of the bogie frame of the bogie in the first embodiment of the present invention;

[0032] Figure 8 It is a schematic diagram of a partial three-dimensional structure at a traction rod in a bogie according to the first embodiment of the present invention;

[0033] Fig. 9 It is a schematic diagram of the three-dimensional structure of the guide wheel group in the first embodiment of the present invention;

[0034] Fig.10 This is a schematic diagram of the overall structure of a miniature overhead rack train and a track system in Embodiment 1 of the present invention;

[0035] Fig.11 for Fig.10 A schematic diagram of a local structure of a bogie located in a carriage;

[0036] Fig.12 for Fig.10 A schematic diagram of the enlarged structure of the middle part A;

[0037] Fig.13 It is a schematic diagram of a partial main view structure of the track in the first embodiment of the present invention;

[0038] Fig.14 for Fig.12 A schematic diagram of the axial cross-sectional structure at the track extension;

[0039] Fig.15 It is a partial front view structural schematic diagram of the rack in the first embodiment of the present invention;

[0040] Fig.16 It is a left-side structural schematic diagram of the track in the first embodiment of the present invention;

[0041] Fig.17 for Figure 2 A schematic diagram of a local structure located in a carriage;

[0042] Fig.18 for Fig.17 The enlarged structural diagram of the middle C part;

[0043] Fig.19 This is a schematic diagram of the left-side structure of the track in the second embodiment of the present invention;

[0044] In the figure: 1. Carriage, 2. Axle 1, 3. Axle 2, 4. Bogie, 411. Bogie frame, 4111. Inverted U-shaped frame, 4112. Sleeve-shaped connecting end 1, 4113. Sleeve-shaped connecting end 2, 412. Gear drive device, 4121. Motor, 4122. Driving gear, 413. Running wheel, 4131. Running wheel 1, 4132. Running wheel 2, 414. Secondary suspension device, 4141. Suspension spring 1, 4142. Suspension spring 2, 4143. Hydraulic vertical shock absorber 1, 4144. Hydraulic vertical shock absorber 2, 4145. Anti-roll torsion bar composition, 415. Drawbar, 416. Guide wheel composition, 4161. Guide wheel support, 4162. Solid wheel, 4163. Rubber stopper, 417. Stable wheel composition, 5. Gear drive device connecting plate, 6. Traveling wheel mounting fork seat 1, 7. Traveling wheel mounting fork seat 2, 8. Spring mounting cylinder 1, 9. Spring mounting cylinder 2, 10. Shock absorber connecting fork seat 1, 11. Shock absorber connecting fork seat 2, 12. Transverse side block 1, 13. Transverse side block 2, 14. Guide wheel mounting fork seat 1, 15. Guide wheel mounting fork seat 2, 16. Rotating shaft, 17. Stable wheel mounting fork seat 1, 18. Stable wheel mounting fork seat 2, 19. Wheel body support, 20. Solid wheel, 21. Rubber stopper, 22. Tooth rail, 221. Tooth rail through hole, 23. Track, 231. Upper rail, 232. Lower rail, 233. Support rod, 24. Pin shaft, 25. Rubber ball joint, 26. Column foundation, 27. Track extension, 271. Metal pipe fittings, 28. Vibration damping parts, 281. Rubber sleeves, 282. Rubber gasket 1, 283. Rubber gasket 2, 29. Rack rail connector, 291. Screw 1, 292. Nut 1, 293. Metal gasket 1, 294. Metal gasket 2, 30. Busbar, 31. Coupler. DETAILED DESCRIPTION

[0045] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] Embodiment 1: Figure 2 As shown, the miniature overhead rack rail sightseeing train is composed of a fixed group of a leading car, four middle cars and a tail car. Two bogies 4 are arranged at the bottom of each car 1. The bogies 4 are power bogies. Each car 1 can carry about 10 passengers.

[0047] The applicant first discloses a bogie design method for a miniature overhead rack rail tour train. In the existing overhead straddle-type monorail train bogie design, as in the patent document (authorization announcement number CN208069658U) mentioned in the background technology, please refer to its attached Figure 2The general design of the overhead straddle monorail train bogie is to design the bogie frame into an inverted U-shape, the track is located in the opening of the inverted U-shaped bogie frame, and the running wheels on the bogie are set in the middle position of the bogie frame, so that the running wheels and the top surface of the track are in rolling contact for supporting the vehicle body to travel. Guide wheels and stabilizing wheels are set on both sides of the inverted U-shaped bogie frame, wherein the guide wheels are located at the upper position and the stabilizing wheels are located at the lower position. The guide wheels and stabilizing wheels on both sides of the bogie frame are respectively located on the two sides of the track, and the guide wheels and stabilizing wheels cooperate with the track to guide and prevent the vehicle body from overturning. Two rack rails are designed in the bogie, which are respectively located on both sides of the track, and correspondingly, two driving gears of the bogie are also set. The bogie is connected to the vehicle body through the core plate and core shaft structure set in the middle position of the top surface of the bogie to transmit longitudinal traction and braking force, so the traction point is located in the middle position of the top surface of the bogie. The bogie is connected to the vehicle body through the secondary suspension components set on both sides of the top surface of the bogie for load bearing and vibration reduction.

[0048] Since the present application is to develop a bogie for a miniature overhead rack rail sightseeing train, and in view of the characteristics of a miniature overhead rack rail sightseeing train as a small mountain climbing rack rail train, its design space is very limited, and it is necessary to ensure that the overall structure of the bogie is simple and compact. Therefore, the bogie in the present application adopts a single traction rod to transmit longitudinal traction and braking force, and the single traction rod is set on one side of the bogie, so that the traction point of the bogie is located on the side of the bogie, and the driving gear of the bogie is also set on one side of the bogie, so that the meshing driving point between the driving gear and the rack is also located on the side of the bogie, and the traction point and the driving point are located on the same side. For details, please refer to Figure 3 , Fig.10 and Fig.11 As shown, one end of the single traction rod 415 is hinged to the bogie 4, and the other end of the single traction rod is hinged to the car body, and the traction point is A1, which is the hinge point between one end of the single traction rod 415 and the bogie, and the driving point is A2, which is the meshing driving point between the driving gear 4122 and the rack 22. The traction point A1 and the driving point A2 are both set on the side of the bogie and are located at the same side position.

[0049] The technical point of "both the traction point A1 and the driving point A2 are set on the side of the bogie and are located on the same side" is because in the prior art, the traction point is located in the middle of the top surface of the bogie, while the meshing driving point between the driving gear and the rack is located on the side of the bogie. The traction point and the driving point are not located on the same side. During the operation of the train, since the traction force is transmitted from the driving point to the traction point of the bogie, and then from the traction point of the bogie to the car body, if they are not on the same side, the torque generated will be relatively large, and the different positions on one side will also produce an eccentric effect, which is very unfavorable to the design of the bogie. Therefore, in this embodiment, the traction point and the driving point are both set on the side of the bogie and are located on the same side.

[0050] In addition, the present embodiment lowers the position of the traction point so that the traction point is as close to the driving point as possible, and the smaller the distance between the traction point and the driving point, the better. Theoretically, it is ideal when the traction point and the driving point are in the same straight line. However, due to the requirements of space design, the traction point cannot be infinitely lowered, and the driving point cannot be infinitely raised. Therefore, how to set the distance between the traction point and the driving point at a suitable position is an issue that needs to be studied. The applicant will elaborate on this issue later.

[0051] Regarding the technical point of "lowering the traction point", this is because in the prior art, the traction point is located in the middle of the top surface of the bogie, which makes the position of the traction point too high. When the position of the traction point is too high, it will cause several problems. One problem is that the space is relatively high in the vertical direction, which is not suitable for small mountain climbing rack trains; the second problem is that the height of the traction point is one of the main factors affecting the axle load transfer. As the height of the traction point continues to increase, the axle load transfer rate continues to increase, and the adhesion utilization rate of the whole vehicle continues to decrease. Therefore, in this embodiment, the position of the traction point is lowered, which not only saves design space, but also reduces the axle load transfer rate, avoids the bogie from rotating and overturning around the Y axis, thereby avoiding the risk of overturning of the carriage and avoiding excessive load on the running wheels on a certain axle of the bogie, thereby improving safety. In addition, arranging the traction point and the driving point on the same side of the bogie is conducive to reducing the rotation torque of the bogie around the Z axis caused by traction or braking force, thereby reducing the force on the guide wheel and further improving safety.

[0052] Regarding the technical point of "the towing point is as close to the driving point as possible", this is because when the distance between the towing point and the driving point is larger, the torque between them is larger, which makes it easier for the vehicle body to have a risk of overturning around the Y-axis direction. Therefore, in this embodiment, the towing point is made as close to the driving point as possible, which avoids the risk of overturning from another aspect.

[0053] The applicant continued to study the technical point of "the appropriate distance between the traction point and the driving point", such as Fig.11 As shown, in this embodiment, the axle center axis of the running wheel 413 is set to B1, and the center waistline position of the track 23 is set to B2, then the traction point A1 and the driving point A2 are located between the axle center axis B1 and the track center waistline B2, and the traction point A1 is located at the upper position, and the driving point A2 is located at the lower position. The applicant has found through repeated experiments that when the position between the traction point A1 and the driving point A2 is set to the above interval, the axle load transfer rate can be further reduced while meeting the design requirements of the small overhead straddle-type monorail train.

[0054] Secondly, the applicant also discloses a bogie for a miniature overhead rack sightseeing train designed according to the above design method, such as Figure 3 and Figure 4 As shown, the bogie 4 includes components such as a bogie frame 41, a gear driving device 412, a running wheel 413, a secondary suspension device 414, a traction rod 415, a guide wheel assembly 416 and a stabilizing wheel assembly 417.

[0055] like Figures 5 to 7 As shown, the bogie frame 411 includes an inverted U-shaped frame body 4111, which is welded from Q355 steel plates and has sufficient strength and rigidity. A gear drive device connecting plate 5 is welded on one side of the frame body 4111, and the gear drive device is installed through the gear drive device connecting plate 5. Figure 3 and Figure 4 As shown, the gear drive device 412 includes a three-in-one reduction motor 4121 and a driving gear 4122 arranged on the output shaft of the motor 4121. The motor 4121 is screwed to the gear drive device connecting plate 5. The motor 4121 and the driving gear 4122 are arranged on one side of the bogie frame, matching the arrangement of the rack on the track. The longitudinal traction and braking force of the motor 4121 are transmitted to the bogie frame through the diameter of the reduction box of the motor 4121, and then transmitted to the carriage 1 through the traction rod 415. The driving gear 4122 in this embodiment adopts an involute gear. A multi-layer adjustment gasket (not shown in the figure) is also arranged between the motor 4121 and the gear drive device connecting plate 5. During operation, when the center distance of the driving gear relative to the rack increases due to wear of the running wheel, the center distance of the gear rack can be adjusted by reducing the number of adjustment gaskets to ensure that the meshing degree between the driving gear and the rack meets the design requirements.

[0056] like Figure 5 and Figure 6 As shown, a running wheel mounting fork seat 1 6 and a running wheel mounting fork seat 2 7 are welded at the middle position of the top surface of the inverted U-shaped frame 4111, and the running wheel mounting fork seat 1 6 and the running wheel mounting fork seat 2 7 are welded at the two sides of the middle part of the inverted U-shaped frame 4111 along the length direction X of the carriage, as shown in FIG. Figure 3 As shown, the running wheel 413 includes a running wheel 1 4131 and a running wheel 2 4132. The running wheel 1 4131 is rotatably connected to the running wheel mounting fork 1 6 via a bearing, and the running wheel 2 4132 is rotatably connected to the running wheel mounting fork 2 7 via a bearing.

[0057] like Figure 3 and Figure 4 As shown, the secondary suspension device 414 includes a suspension spring 1 4141, a suspension spring 2 4142, a hydraulic vertical shock absorber 1 4143, a hydraulic vertical shock absorber 2 4144, and an anti-roll torsion bar 4145. Figure 5 and Figure 6 As shown, a spring mounting cylinder 1 8 and a spring mounting cylinder 2 9 are respectively welded on both side edges of the frame 4111, one end of a suspension spring 1 4141 is arranged in the spring mounting cylinder 1 8, and the other end of the suspension spring 1 4141 is connected to the car body; one end of a suspension spring 2 4142 is arranged in the spring mounting cylinder 2 9, and the other end of the suspension spring 2 4142 is connected to the car body, and the bogie bears the weight of the car body through the suspension spring. Shock absorber connection fork seat 10 and shock absorber connection fork seat 2 11 are welded on the outer circumference of the spring installation cylinder 1 8 and the spring installation cylinder 2 9, respectively. One end of the hydraulic vertical shock absorber 1 4143 is hinged to the shock absorber connection fork seat 10, and the other end of the hydraulic vertical shock absorber 1 4143 is hinged to the car body. One end of the hydraulic vertical shock absorber 2 4144 is hinged to the shock absorber connection fork seat 2 11, and the other end of the hydraulic vertical shock absorber 2 4144 is hinged to the car body. The bogie reduces vibration of the car body through the hydraulic vertical shock absorber. Figure 3 and Figure 4 As shown, the middle part of the inverted U-shaped frame 4111 is connected to the car body through the anti-roll torsion bar assembly 4145, and the bogie provides the car body with an anti-roll function through the anti-roll torsion bar assembly.

[0058] like Figure 3 and Figure 8 As shown, a sleeve-shaped connecting end 1 4112 is provided on one side of the inverted U-shaped frame 4111, and one end of the traction rod 415 is provided as a fork seat structure. One end of the traction rod 415 is hinged to the sleeve-shaped connecting end 1 4112 on one side of the inverted U-shaped frame 4111 through a pin shaft 24, and the other end of the traction rod 415 is connected to a swing arm through a rubber ball joint 25. The swing arm is installed on the car body bottom frame through a traction pin (not shown in the figure), and the two swing arms are connected by a pin through a pull rod. A transverse side stop 12 and a transverse side stop 2 13 are also provided on both sides of the middle of the top surface of the inverted U-shaped frame 4111. The longitudinal traction force and braking force are transmitted through the traction rod, and the transverse load is transmitted through the transverse side stop, and the car body can be flexibly rotated relative to the bogie.

[0059] like Figure 8As shown, a sleeve-shaped connecting end 2 4113 is further provided on one side of the inverted U-shaped frame 4111 and located at the sleeve-shaped connecting end 1 4112. The direction of the sleeve-shaped connecting end 2 4113 is opposite to that of the sleeve-shaped connecting end 1 4112. Figure 2 As shown, when two adjacent carriages 1 are marshaled and connected, the sleeve-shaped connecting end 2 4113 on the bogie of one carriage 1 and the sleeve-shaped connecting end 2 4113 on the bogie of another carriage 1 are connected through a coupler, so that the two adjacent carriages 1 are connected together, that is, the two ends of the coupler 31 are respectively connected to the sleeve-shaped connecting ends 2 4113 on the two bogies through the coupler ball joint. With this design, the interaction force between the two adjacent carriages is directly transmitted to the bogie through the coupler to reduce the load on the carriage bottom frame, which is conducive to the lightweight of the car body structure. At the same time, the coupler angle when the train passes through a curve can also be reduced, thereby reducing the additional lateral force caused by the longitudinal force of the coupler when passing through a curve, which is conducive to improving the curve passing performance of the train.

[0060] like Figure 5 and Figure 6 As shown, a guide wheel mounting fork seat 14 is welded on one side of the inverted U-shaped frame 4111 near the running wheel mounting fork seat 16, and a guide wheel mounting fork seat 2 15 is welded on one side of the inverted U-shaped frame 4111 near the running wheel mounting fork seat 2 7. There are two guide wheel mounting forks 14 and 2 15, and the two guide wheel mounting forks 14 and 2 15 are respectively arranged on both sides of the inverted U-shaped frame 4111. There are four guide wheel assemblies 416 in total, and each guide wheel mounting fork is equipped with a guide wheel assembly 416. Fig. 9 As shown, the guide wheel assembly 416 is arranged horizontally. When working, the solid wheels 20 on the two guide wheel mounting forks 14 and the solid wheels 20 on the two guide wheel mounting forks 2 15 respectively roll with the two side surfaces of the track to guide the vehicle body. When the wheel support 19 rotates through a curve, the rubber stopper 21 contacts the frame of the bogie to reduce vibration.

[0061] like Figure 5 and Figure 6As shown, a stabilizing wheel mounting fork seat 17 is welded on one side of the frame body 4111 located at the opening of the inverted U-shaped frame body 4111, and a stabilizing wheel mounting fork seat 2 18 is welded on the other side of the frame body 4111 located at the opening of the inverted U-shaped frame body 4111. Two stabilizing wheel mounting fork seats 17 and two stabilizing wheel mounting fork seats 2 18 are provided, and the two stabilizing wheel mounting fork seats 17 and the two stabilizing wheel mounting fork seats 2 18 are respectively provided on both sides of the inverted U-shaped frame body 4111. There are four stabilizing wheel assemblies 417 in total, and each stabilizing wheel mounting fork seat is installed with a stabilizing wheel assembly 417. The structure of the stabilizing wheel assembly 417 is the same as that of the guide wheel assembly 416, and is also horizontally arranged. When working, the solid wheels 20 on the two stabilizing wheel mounting forks 17 and 20 on the two stabilizing wheel mounting forks 18 respectively roll with the two sides of the track to stabilize the vehicle body. When the wheel body support 19 rotates during the curve, the rubber stopper 21 contacts the frame of the bogie to reduce vibration. Therefore, a total of 8 sets of horizontal wheel sets are designed on a bogie, which mainly play the role of guiding and anti-overturning, ensuring that the train runs along the track without overturning.

[0062] like Figure 1 and Figure 6 As shown, a safety wheel is rotatably connected to one side of the inverted U-shaped frame, and the safety wheel is located below the rack (not shown in the figure). Under normal working conditions, there is a gap between the safety wheel and the rack. When the carriage overturns around the Y-axis direction, the safety wheel contacts the rack to limit the carriage and prevent it from overturning.

[0063] Again, the applicant also discloses a miniature overhead rack rail sightseeing train system including the bogie as described above, and the miniature overhead rack rail sightseeing train system is composed of tracks, a line power supply system, a line monitoring system, a communication signal system, a miniature overhead rack rail sightseeing train, a platform and a vehicle base.

[0064] In an overhead sightseeing train based on gear transmission, the rack rail is the power base of the rack vehicle. The train's driving gear provides running power by meshing with the rack, overcoming the vehicle's gravity and track resistance. In the prior art, the rack is installed on the track beam. For example, a Chinese utility model patent with authorization announcement number CN208069658U and authorization announcement date of November 9, 2018 discloses a straddle-type monorail dual-mode drive bogie that can adapt to extremely large slopes, including a frame and two pairs of running wheels and their drive motors installed thereon, the running wheels use the top surface of the concrete track beam as the running surface, the frame is fixedly provided with a second drive motor and a rack gear driven by it, the concrete track beam is fixedly provided with a rack, and the rack gear meshes with the upper tooth groove of the rack. From the patent document and the attached documents in the patent document, Figure 2It can be seen from the figure that a rack rail is arranged on the left and right sides of the concrete track beam.

[0065] The problem in the prior art is that when the driving gear of the train is meshed with the rack rail, a lot of noise will be generated during the train operation, which will cause harm to people's body and mind, and also have a great impact on the environment.

[0066] Therefore, the applicant has also conducted research on this technical problem. The applicant found that the train will generate vibration when it is running. The vibration mainly comes from the high-frequency vibration of the drive motor with the drive gear and the high-frequency vibration when the drive gear is meshing with the rack, especially the high-frequency vibration when the drive gear is meshing with the rack. After calculation, when the train speed is 15 kilometers per hour, the vibration frequency can reach more than 100 Hz. There are many factors that affect the noise generated when the drive gear rack is meshing, such as 1. The accuracy of the gear rack. Low-precision gear racks will increase gear noise and transmission errors; 2. Load. The noise generated by the load is mainly due to the weight borne by the gear rack. The gear rack will generate obvious noise when it is overloaded. 3. Fluctuation frequency. Some gear racks have high friction and high rotation speed, which can easily cause excessive vibration speed and generate corresponding noise.

[0067] The rack is connected to the track. When the vibration is transmitted to the track through the rack and resonates with the track, a lot of noise will be generated. Therefore, the applicant designed a rack vibration reduction and noise reduction structure to block or reduce the process of the rack vibration being transmitted to the track, thereby achieving the purpose of vibration reduction and noise reduction.

[0068] like Fig.10 As shown, two rails 23 are arranged on the column foundation 26, and a rack rail 22 is arranged on one side of each rail 23. The specific connection structure between the rack rail 22 and the rail 23 is as shown in FIG. Fig.12 and Fig.13As shown, a plurality of rack connection points B are provided on one side of the track 23 along the length direction of the track 23, and a track extension 27 is provided at each rack connection point B. One end of the track extension 27 is fixedly connected to the track 23, and a vibration damping member 28 is provided on the other end of the track extension 27. The rack 22 is provided on the vibration damping member 28, and the rack 22 and the track extension 27 are isolated from each other by the vibration damping member 28. The rack 22, the vibration damping member 28 and the track extension 27 are locked and connected together by a rack connection member 29, so that the rack 22 is connected to one side of the track 23. A vibration damper is further provided between the rack and the track in the present embodiment, which is equivalent to an elastic connection structure between the rack and the track, while in the prior art, the rack and the track are a rigid connection structure. Therefore, in the present embodiment, during the operation of the train, when the driving gear and the rack mesh and transmit vibration, since the rack and the track extension are isolated from each other by the vibration damper, the vibration transmitted from the rack can be blocked and damped by the vibration damper, thereby greatly reducing the vibration energy transmitted from the rack to the track, making it impossible for the track to resonate with the rack and pinion, and ultimately reducing the noise emitted by the overhead rack train during operation, reducing the harm caused by the noise to people's physical and psychological health, and reducing the impact of the noise on the environment.

[0069] like Fig.14 and Fig.15 As shown, the track extension 27 is a metal pipe 271, which is horizontally arranged, and one end of the metal pipe is welded to the track 23. The vibration damper 28 includes a rubber sleeve 281 arranged on the rack 22, and a plurality of rack through holes 221 are opened on the side of the rack 22 along the length direction of the rack 22, and a rubber sleeve 281 is arranged in each rack through hole 221, and the tooth opening of the rack 22 is arranged downward, and the vibration damper 28 also includes a rubber gasket 282 and a rubber gasket 283, and the rubber gasket 282 and the rubber gasket 283 are arranged vertically. The rack connecting member 29 includes a screw 291, a nut 292, a metal gasket 293 and a metal gasket 294. During installation, screw 1 291 is sequentially passed through metal gasket 1 293, rubber gasket 1 282, rubber sleeve 281 on the rack rail, rubber gasket 2 283, metal gasket 2 294 and the inner hole of metal pipe 271, and then matched with nut 1 292 for locking, thereby connecting rack rail 22 to one side of track 23. In this way, the elastic vibration reduction structure composed of rubber sleeve and rubber gasket is used to isolate the rack rail and track extension from each other, so as to better reduce vibration and noise.

[0070] like Fig.13 and Fig.16As shown, the track 23 of the miniature overhead rack train adopts a truss steel structure beam, including an upper rail 231 and a lower rail 232 and a support rod 233 arranged between the upper rail 231 and the lower rail 232. The lower rail of the track 23 is connected to the column foundation 26 through a mounting seat, and one end of the track extension 27 is connected to the support rod 233. In this embodiment, the upper rail 231 and the lower rail 232 adopt circular tubes, and the material is seamless steel pipe. The upper and lower rails adopt circular tubes, which can facilitate the arrangement of the upper and lower rails at the turning point. The track structure designed in this way is simple, the cost is low, and it is suitable for miniature overhead rack trains.

[0071] like Fig.17 As shown, the running wheels 413 at the bottom of the bogie 4 run on the upper rail 231 and roll with the top of the upper rail 231, the guide wheel components 416 at both sides of the bottom of the bogie 4 respectively roll with the two side surfaces of the upper rail 231, and the stabilizing wheel components 417 at both sides of the bottom of the bogie 4 respectively roll with the two side surfaces of the lower rail 232 to prevent the car from overturning. The driving gear 4122 on the output shaft of the driving motor on the bogie meshes with the rack 22 for transmission.

[0072] In this embodiment, the running wheel 413 is a polyurethane rubber solid wheel, and the wheel tread is designed to be a concave arc shape to adapt to the circular upper rail. The running wheel in the prior art generally uses an inflatable rubber tire, but during the running vibration process, the elasticity of the inflatable rubber tire is relatively large, so that the vibration amplitude of the bogie will increase, and eventually affect the meshing relationship between the driving gear and the rack. In this embodiment, a solid wheel is used, which can reduce the vibration amplitude of the bogie, so that the driving gear and the rack are better meshed together for transmission.

[0073] like Fig.16 As shown, a plurality of power supply and signal busbars 30 are also arranged on one side of the support rod 233 of the track, and are arranged vertically, so as to save installation space.

[0074] In this embodiment, if Fig.18 As shown, the teeth of the rack 22 are set downward, so that the driving gear 4122 matched with it is located below the rack 22, and the driving gear 4122 is connected to the driving motor and the bogie. Therefore, when the car body has a tendency to overturn in the Y direction, the driving gear 4122 and the rack 22 form a limiting structure to avoid the risk of overturning of the car body.

[0075] Embodiment 2: Fig.19 As shown, compared with the first embodiment, the difference is that the upper rail 231 and the lower rail 232 of the track in this embodiment are both made of square tubes, so the wheel tread shape of the running wheel is designed to be a concave straight line to adapt to the square upper rail.

[0076] In summary, the bogie in the present invention adopts a single traction rod structure and through the layout design of the traction point and the driving point on the bogie, the bogie designed by the present invention not only saves design space, is suitable for a miniature overhead rack rail sightseeing train, but also reduces the axle weight transfer rate, avoids the bogie from rotating and overturning around the Y axis, thereby avoiding the risk of the carriage overturning and avoiding the running wheel on a certain wheel axle on the bogie from being overloaded, thereby improving safety. In addition, arranging the traction point and the driving point on the same side of the bogie is conducive to reducing the rotation torque of the bogie around the Z axis caused by the traction force or braking force, thereby reducing the force on the guide wheel and further improving safety. By setting a reasonable position between the traction point and the driving point, the axle weight transfer rate can be further reduced while meeting the design requirements of a small overhead straddle-type monorail train. By designing the structural layout position between the components of the bogie, the structure of the entire bogie is simplified, making the layout between the components of the bogie more compact. By further arranging a vibration damping member between the rack and the track, it is equivalent to an elastic connection structure between the rack and the track, while in the prior art, the rack and the track are a rigid connection structure. Therefore, in the present invention, during the operation of the train, when the driving gear and the rack mesh and transmit and generate vibration, since the rack and the track extension are isolated from each other by the vibration damping member, the vibration transmitted from the rack can be blocked and damped by the vibration damping member, thereby greatly reducing the vibration energy transmitted from the rack to the track, making it impossible for the track to resonate with the rack and pinion, and ultimately reducing the noise emitted by the overhead rack train during operation, reducing the harm caused by the noise to people's physical and psychological health, and reducing the impact of the noise on the environment.

[0077] The "multiple" mentioned in this embodiment refers to the number of "two or more". The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Those skilled in the relevant technical field can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. A miniature overhead rack rail sightseeing train system, comprising a track and a miniature overhead rack rail sightseeing train running on the track, wherein a bogie is arranged at the bottom of a carriage of the miniature overhead rack rail sightseeing train, a plurality of rack rail connection points are arranged on one side of the track along the length direction of the track, a track extension is arranged at each rack rail connection point, one end of the track extension is fixedly connected to the track, a vibration damping member is arranged on the other end of the track extension, the rack rail is arranged on the vibration damping member, the rack rail and the track extension member are isolated from each other by the vibration damping member, the rack rail, the vibration damping member and the track extension member are locked and connected together by the rack rail connection member, thereby connecting the rack rail to one side of the track, characterized in that: The track extension piece is a pipe fitting, which is arranged horizontally, and one end of the metal pipe fitting is fixed to the track; the vibration damping piece includes a rubber sleeve arranged on the rack rail, and a plurality of rack rail through holes are opened on the side of the rack rail along the length direction of the rack rail, and a rubber sleeve is arranged in each rack rail through hole, and the vibration damping piece also includes a rubber gasket 1 and a rubber gasket 2; the rack rail connecting piece includes a screw 1, a nut 1, a metal gasket 1 and a metal gasket 2; The rack is connected to one side of the track by using screw 1 which passes through metal gasket 1, rubber gasket 1, rubber sleeve on the rack, rubber gasket 2, metal gasket 2 and the inner hole of the pipe fitting in sequence and then locked with nut 1.

2. The miniature overhead rack sightseeing train system according to claim 1, characterized in that: The track comprises an upper track, a lower track and a support rod arranged between the upper track and the lower track; one end of the metal pipe is fixedly connected to one side of the support rod.

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