Damping and noise reduction method for overhead toothed rail vehicle running with steel structure track

Abstract

The application discloses a kind of overhead rack rail car running vibration reduction and noise reduction method using steel structure track, which is to set up elastomeric connecting piece between steel structure track and rack, connect rack on steel structure track through the elastomeric connecting piece, so that rack is elastically connected on steel structure track, so as to carry out vibration reduction and noise reduction.The application changes the rigid connection between rack and steel structure track into elastic connection, and uses elastomeric connecting piece to isolate rack from steel structure track, thereby avoiding the problem of track resonance by vibration isolation, reducing the noise emitted by rack rail train during operation on steel structure track, reducing the harm caused by noise to human body and psychology, and reducing the impact of noise on the environment.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of vibration reduction noise reduction method, more particularly to a kind of vibration reduction noise reduction method when overhead rack rail car is operated with steel structure track. BACKGROUND

[0002] The rack rail train based on gear transmission is a mountain railway, which replaces the scheme of line expansion and long tunnel in steep natural slope section in mountainous area. The actual steepest slope of ordinary track railway in the world is 70 ‰, and the maximum slope of rack rail has reached 480 ‰. The main design concept of rack rail is that a special rack rail is placed on the sleeper in the middle of ordinary rail. The rack rail locomotive is equipped with one or more gears, which engages with the rack rail to walk, so that the locomotive can overcome the problem of insufficient adhesion. The climbing ability of rack rail is not as good as cable railway, but it can build longer and more complex routes.

[0003] In the rack rail car, the rack is the power basis of the rack rail vehicle. The driving gear of the train provides running power through the engagement with the rack, which overcomes the gravity of the vehicle and the line resistance. When the overhead rack rail car adopts steel structure track, the self-weight of the track beam of the steel structure will generate bending moment and shear force. At the same time, in the running process of the train, the running wheel runs on the running rail of the track beam, and the guide wheel realizes guidance on the guide rail on both sides. The load of the train is transmitted to the track beam through the running wheel and the guide wheel, and the track beam generates bending moment, shear force and torque. The track beam not only bears vertical load, but also bears large lateral load and torque.

[0004] As shown in Figure 1 In the prior art, the rack installation scheme refers to the installation structure of existing ground rack rail train at home and abroad. The rack 1 is fixedly installed on the transverse beam of the steel structure track 3 through bolts and fasteners 2. The rack 1 and the steel structure track 3 are rigidly connected. If it is in the ground rack rail train system, the rack is connected to the sleeper through the fastener, and the two running steel rails are also connected to the sleeper through the fastener. The sleeper is directly connected to the ground, and the ground has good vibration absorption effect. The high-frequency vibration of the train driving system will not cause resonance of the track system. The steel structure track is a light steel structure, and is fully overhead with steel columns. If the rack and the steel structure track are rigidly connected, the high-frequency vibration of the driving system will be transmitted to the entire steel structure track through the gear and rack during the running of the train, causing resonance and generating a large noise.

[0005] A tooth rail fastener system for a concrete sleeper is disclosed in Chinese patent application CN113215871A published on August 6, 2021, which comprises a tooth rail clamp, a tooth rail rigid fastening device, an elastic pad plate and a fastener bottom plate. The tooth rail clamp is used to clamp the tooth rail. The tooth rail rigid fastening device is installed on the tooth rail clamp and is used to rigidly fasten the tooth rail on the tooth rail clamp. The fastener bottom plate is located below the tooth rail clamp and is fixedly connected with the tooth rail clamp. The elastic pad plate is arranged between the tooth rail clamp and the fastener bottom plate. The fastener bottom plate has a structure of three-way shoulder and one-way opening. The elastic pad plate and the fastener bottom plate can be fixedly connected by fasteners and the concrete sleeper.

[0006] A tooth rail system suitable for ballast track of large slope bridge is disclosed in Chinese utility model CN217438581U granted on September 16, 2022, which comprises a sleeper, a rack and a tooth rail fastener. The tooth rail fastener is symmetrically arranged on the sleeper. The rack is arranged between the tooth rail fasteners symmetrically arranged on both sides. The tooth rail fastener comprises a side plate connected with the rack and a bottom plate connected with the sleeper. The rack is connected with the side plates of the tooth rail fasteners on both sides through the through holes of the connecting pieces. The tooth rail fasteners on both sides are provided with connecting grooves corresponding to the positions of the tooth rail fasteners. The side plates of the tooth rail fasteners are arranged in the connecting grooves, and the longitudinal length of the connecting grooves is greater than that of the side plates. The through holes in the connecting grooves of the tooth rail fasteners or the rack are long holes arranged along the longitudinal direction.

[0007] As can be seen from the above two patent documents, the existing tooth rails are rigidly connected by fasteners. Therefore, when the tooth rail is rigidly connected to the steel structure track by the fastener, resonance will occur during the operation of the train, resulting in a large noise. The noise will cause harm to the body and psychology of people, and will also have a great impact on the environment.

[0008] In summary, it is a technical problem to be solved to design a vibration and noise reduction method for overhead tooth rail trains using steel structure tracks, which can reduce the noise generated by the tooth rail train during operation on the steel structure track, reduce the harm caused by the noise to the body and psychology of people, and reduce the impact of the noise on the environment. SUMMARY

[0009] The technical problem to be solved by the present application is to provide a vibration and noise reduction method for overhead tooth rail trains using steel structure tracks, which can reduce the noise generated by the tooth rail train during operation on the steel structure track, reduce the harm caused by the noise to the body and psychology of people, and reduce the impact of the noise on the environment.

[0010] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a damping and noise reduction method for an overhead rack rail car running on a steel structure track, which comprises the following steps: setting an elastic body connecting piece between the steel structure track and the rack, and connecting the rack to the steel structure track through the elastic body connecting piece, so that the rack is elastically connected to the steel structure track, thereby achieving damping and noise reduction.

[0011] Preferably, the elastic body connecting piece is designed as two parts of a rubber support and a rack support structure; the rack is connected to the rack support structure, the rubber support is connected to the steel structure track, and the rack support structure is connected to the rubber support, so that the rack is elastically connected to the steel structure track.

[0012] Preferably, the rubber support is designed as two parts of a support bottom plate and a support top plate which is vulcanized and bonded to the support bottom plate by a rubber body; transverse stop blocks one and two are respectively arranged on the support bottom plate and located at both sides of the support top plate in the transverse direction; the support top plate is used to connect the rack support structure, and the height of the support top plate is less than the height of the transverse stop blocks one and two; gaps B are respectively left between the support top plate and the transverse stop blocks one and two.

[0013] Preferably, the rack support structure is designed as two parts of a connecting bottom plate and a rectangular tube which is welded to the connecting bottom plate; the rack is connected to the rectangular tube; the connecting bottom plate is connected to the support top plate of the rubber support, so that the rack support structure is connected to the rubber support.

[0014] During operation, the connecting bottom plate is in contact with the transverse stop blocks one and two, thereby limiting the rack in the transverse direction.

[0015] Preferably, when the rack rail car runs, guide wheels one and two in the gear drive device of the rack rail car are respectively located at opposite sides of the rectangular tube; the guide wheels one and two are in contact with the rectangular tube, thereby guiding the rack rail car and preventing the gear from vertically separating from the rack.

[0016] Preferably, the driving gear of the overhead rack rail car is designed as an elastic driving gear, so that the driving gear has an elastic deformation amount, thereby further eliminating the vibration and noise during the running of the rack rail car.

[0017] Preferably, the elastic driving gear is designed as two parts of an outer shell and an inner ring gear, the inner ring gear and the outer shell are connected through an elastic damping mechanism, the outer shell is connected to a rotating shaft, and the teeth of the inner ring gear are engaged with the rack; during operation, driving force is transmitted to the inner ring gear through the rotating shaft and the outer shell in sequence, and then the driving force is transmitted to the rack through the engagement between the teeth of the inner ring gear and the rack, thereby driving the rack rail car to move.

[0018] Preferably, the outer shell comprises an upper shell and a lower shell, the upper shell comprises a shell body and an axial sleeve arranged at the center of one side of the shell body, a plurality of grooves I are arranged on the side of the shell body, and the plurality of grooves I are sequentially distributed along the circumference of the shell body; a lower shell center hole is opened at the center of one side of the lower shell, and a plurality of grooves II are arranged on the side of the lower shell, and the plurality of grooves II are sequentially distributed along the circumference of the lower shell;

[0019] An inner ring center hole is opened at the center of the inner ring side, and a plurality of openings are also opened on the side of the inner ring, and the plurality of openings are sequentially distributed along the circumference of the inner ring;

[0020] The elastic damping mechanism comprises springs and damping members, the springs are provided in plurality, each spring is arranged in an opening of an inner ring, and along the radial direction of the spring, the two sides of the spring are exposed to the side of the inner ring to form spring exposed parts;

[0021] When assembled, the axial sleeve of the upper shell is passed through the inner ring center hole of the inner ring and the lower shell center hole of the lower shell, so that the upper shell and the lower shell are attached together, the inner ring is located between the upper shell and the lower shell, and the upper shell and the lower shell are connected through the connecting piece III;

[0022] When the upper shell and the lower shell are connected, one groove I and one groove II correspond to each other, and the one groove I and the side of the inner ring form a spring mounting upper cavity, and the one groove II and the other side of the inner ring form a spring mounting lower cavity; along the radial direction of the spring, the spring exposed part on one side of each spring is located in the spring mounting upper cavity, and the two end faces of the spring exposed part on one side of each spring are in contact with the inner cavity wall of the spring mounting upper cavity, and the spring exposed part on the other side of each spring is located in the spring mounting lower cavity, and the two end faces of the spring exposed part on the other side of each spring are in contact with the inner cavity wall of the spring mounting lower cavity;

[0023] The damping member comprises an upper damping ring and a lower damping ring, the lower damping ring is arranged between the lower shell and the side of the inner ring close to the inner ring center hole, the upper damping ring is arranged between the upper shell and the other side of the inner ring close to the inner ring center hole, a disc spring is arranged in the upper shell, and the side of the inner ring close to the inner ring center hole is pressed between the upper damping ring and the lower damping ring through the locking screw and the disc spring.

[0024] Preferably, when the inner gear ring is suddenly subjected to a great impact force, the elastic deformation of the spring can cause a relative rotation angle between the inner gear ring and the outer shell along the circumference, thereby buffering by the elastic deformation of the spring; the upper and lower damping rings and the side of the inner gear ring near the central hole of the inner gear ring are used to absorb the impact energy and reduce vibration by mutual friction.

[0025] The technical effect of the present application is that the present application changes the rigid connection between the rack and the steel structure track into an elastic connection, uses the elastic body connecting piece to isolate the rack from the steel structure track, thereby avoiding the problem of track resonance, reducing the noise emitted by the rack train during operation on the steel structure track, reducing the harm to the human body and psychology caused by noise, and reducing the impact of noise on the environment. Through further improvement of the elastic body connecting piece, transverse stopper one and transverse stopper two are arranged on the support bottom plate, and when the rack train is running, the transverse stopper one and the transverse stopper two are used to limit the rack in the transverse direction, thereby reducing the transverse swing amplitude of the rack. The existing driving gear structure is improved into an elastic driving gear structure, so that when the driving gear has a certain elastic deformation amount, the impact force can be absorbed and eliminated by a certain amount of deformation when the driving gear is subjected to the impact force, further eliminating the vibration noise of the rack train during operation, and improving the service life of the driving gear. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the rack installation structure on the steel structure track beam in the prior art;

[0027] Figure 2 It is a schematic diagram of the rack installation structure on the steel structure track beam in the present application;

[0028] Figure 3 It is Figure 2 It is an enlarged structural schematic diagram of part A;

[0029] Figure 4 It is an exploded structural schematic diagram of the elastic body connecting piece in the present application;

[0030] Figure 5 It is a structural schematic diagram of the rubber support in the present application;

[0031] Figure 6 It is a structural schematic diagram of the rack support structure in the present application;

[0032] Figure 7 It is a structural schematic diagram of the rack when the rack train is running;

[0033] Figure 8 It is a three-dimensional structural schematic diagram of the elastic driving gear in the present application;

[0034] Figure 9 Fig. 1 is a top view of the elastic driving gear of the embodiment of the present application;

[0035] Figure 10 Fig. 2 is a sectional view along the line C-C of Fig. 1; Figure 9

[0036] Figure 11 Fig. 3 is a perspective view of the upper shell of the embodiment of the present application;

[0037] Figure 12 Fig. 4 is a perspective view of the lower shell of the embodiment of the present application;

[0038] Figure 13 Fig. 5 is a perspective view of the inner ring of the embodiment of the present application after the spring is removed;

[0039] Figure 14 Fig. 6 is a perspective view of the inner ring of the embodiment of the present application after the spring is installed;

[0040] Figure 15 Fig. 7 is a sectional view along the line D-D of Fig. 1; Figure 10

[0041] Fig. 1 is a perspective view of the embodiment of the present application; DETAILED DESCRIPTION

[0042] The technical solutions of the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0043] ​​The embodiment is a damping and noise reduction method for overhead rack rail vehicle running with steel structure track, which sets an elastic body connecting piece between the steel structure track and the rack, connects the rack to the steel structure track through the elastic body connecting piece, and elastically connects the rack to the steel structure track. The rigid connection between the rack and the steel structure track is changed into elastic connection, the rack is isolated from the steel structure track by the elastic body connecting piece, thereby avoiding track resonance and reducing noise generated by the rack rail vehicle running on the steel structure track, and reducing the harm of noise to human body and psychology and the influence of noise on the environment.

[0044] As shown in Figures 2 to 4 , the elastic body connecting piece comprises a rubber support 4 and a rack support structure 5 connected to the rubber support 4, the rack 1 is connected to the rack support structure 5, and the rubber support 4 is detachably connected to the steel structure track 3 through a bolt or the like connecting piece one 6, so that the rack is elastically connected to the steel structure track.

[0045] As shown in Figure 5 , the rubber support 4 comprises a support bottom plate 411 and a support top plate 413 which is vulcanized and bonded to the support bottom plate 411 through a rubber body 412, the width direction of the steel structure track 3 is set as the transverse direction, the length direction of the steel structure track 3 is set as the longitudinal direction, then the transverse block one 7 and the transverse block two 8 are arranged on the support bottom plate 411 and located at both sides of the support top plate 413 along the transverse direction, the support top plate 413 is used for connecting the rack support structure 5, and the height of the support top plate 413 is less than the height of the transverse block one 7 and the transverse block two 8, and gaps B are left between the support top plate 413 and the transverse block one 7 and between the support top plate 413 and the transverse block two 8, so that when the rack support structure 5 is connected to the support top plate 413, the rack support structure 5 is in contact with the transverse block one 7 and the transverse block two 8, thereby limiting the rack support structure 5 in the transverse direction.

[0046] As shown in Figure 6 , the rack support structure 5 comprises a connecting bottom plate 511 and a rectangular tube 512 welded to the connecting bottom plate 511, the rack 1 is connected to the rectangular tube 512 through a bolt or the like connecting piece two 9, and the teeth of the rack 1 are arranged in the horizontal direction after connection. The connecting bottom plate 511 is connected to the support top plate 413 of the rubber support 4 through a bolt or the like connecting piece three, thereby connecting the rack support structure 5 to the rubber support 4. As shown in Figure 3 , when the rack rail vehicle runs, the connecting bottom plate 511 is in contact with the transverse block one 7 and the transverse block two 8, thereby limiting the rack 1 in the transverse direction and reducing the transverse swing amplitude of the rack. As shown in Figure 7As shown, the guide wheels one 10 and two 11 in the gear drive device of the rack car are respectively located at opposite sides of the rectangular tube 512 when the rack car is running. Through the cooperation and contact between the guide wheels one 10 and two 11 and the rectangular tube 512, the guide wheels one 10 and two 11 can guide the rack car and prevent the rack car from vertically separating from the rack and pinion.

[0047] As shown in Figure 7 , the applicant also improves the driving gear 12 engaged with the rack 1. When the driving gear 12 is discontinuously driven due to some reasons during the rotation process, the driving gear 12 will be subjected to a great impact force, which will also cause the rack car to vibrate and make noise during the running process and cause damage to the driving gear 12. Therefore, the applicant improves the existing driving gear structure into an elastic driving gear structure, so that when the driving gear 12 has a certain elastic deformation amount, the impact force can be absorbed and eliminated by a certain amount of deformation when the driving gear 12 is subjected to the impact force, further eliminating the vibration and noise of the rack car during the running process, and also improving the service life of the driving gear.

[0048] As shown in Figure 8 , the applicant designs the driving gear 12 into two parts of an outer shell 13 and an inner ring gear 14, and the inner ring gear 14 and the outer shell 13 are connected through an elastic damping mechanism. The outer shell 13 is connected with a rotating shaft (not shown in the figure), and the teeth of the inner ring gear 14 are engaged with the rack. During work, the driving force is transmitted to the inner ring gear 14 through the rotating shaft and the outer shell 13 in turn, and then the teeth of the inner ring gear 14 are engaged with the rack 1, so as to drive the rack car to move.

[0049] As shown in Figure 9 and Figure 10 , the outer shell 13 includes an upper shell 131 and a lower shell 132, and the upper shell 131 and the lower shell 132 are connected through a connecting piece three 15 such as a bolt. The upper shell 131 or the lower shell 132 is connected with the rotating shaft 16 through a key. In this embodiment, the upper shell 131 is connected with the rotating shaft 16.

[0050] As shown in Figures 10 to 12As shown, the upper shell 131 comprises a shell body 1311 and an axial sleeve 1312 arranged at the center of one side of the shell body 1311, the shell body 1311 and the axial sleeve 1312 are an integral structure, a plurality of grooves one 17 are arranged on one side of the shell body 1311 and sequentially distributed along the circumference of the shell body 1311. A lower shell center hole 1321 is opened at the center of one side of the lower shell 132, and a plurality of grooves two 18 are arranged on one side of the lower shell 132 and sequentially distributed along the circumference of the lower shell 132.

[0051] As shown in Figure 13 and Figure 14 An inner tooth ring center hole 141 is opened at the center of the side of the inner tooth ring 14, and a plurality of openings 142 are also opened on the side of the inner tooth ring 14 and sequentially distributed along the circumference of the inner tooth ring 14. In this embodiment, the opening 142 is rectangular.

[0052] The elastic damping mechanism comprises a spring and a damping piece, and in this embodiment, the spring can adopt a compression spring. The spring 19 is provided in plurality, each spring 19 is arranged in an opening 142 of an inner tooth ring 14, the length direction of the spring 19 is consistent with the length direction of the opening 142, along the radial direction of the spring 19, the two sides of the spring 19 are exposed to the side of the inner tooth ring 14 to form a spring exposed part 191.

[0053] As shown in Figure 10 and Figure 15 When assembled, the axial sleeve 1312 of the upper shell 131 is passed through the inner tooth ring center hole 141 of the inner tooth ring 14 and the lower shell center hole 1321 of the lower shell 132, so that the upper shell 131 and the lower shell 132 are fitted together, the inner tooth ring 14 is located between the upper shell 131 and the lower shell 132, and then the upper shell 131 and the lower shell 132 are connected by bolts or other connecting members three 15. When the upper shell 131 and the lower shell 132 are connected, one groove one 17 and one groove two 18 correspond to each other, and the one groove one 17 and the side of the inner tooth ring 14 form a spring mounting upper cavity 24, and the one groove two 18 and the other side of the inner tooth ring 14 form a spring mounting lower cavity 25, along the radial direction of the spring 19, the spring exposed part 191 of one side of each spring 19 is located in the spring mounting upper cavity 24, and the two end faces of the spring exposed part 191 of one side of each spring 19 are respectively in contact with the inner cavity wall of the spring mounting upper cavity 24, and the spring exposed part 191 of the other side of each spring 19 is located in the spring mounting lower cavity 25, and the two end faces of the spring exposed part 191 of the other side of each spring 19 are respectively in contact with the inner cavity wall of the spring mounting lower cavity 25.

[0054] The damping member comprises an upper damping ring 20 and a lower damping ring 21, the lower damping ring 21 is arranged between the lower shell 132 and one side of the inner gear ring 14 near the inner gear ring central hole 141, and the upper damping ring 20 is arranged between the upper shell 131 and the other side of the inner gear ring 14 near the inner gear ring central hole 141, and a disc spring 22 is further arranged in the upper shell 131, and the side of the inner gear ring 14 near the inner gear ring central hole 141 is pressed between the upper damping ring 20 and the lower damping ring 21 through the locking screw 23 and the disc spring 22. In the embodiment, the locking screw 23 and the disc spring 22 are arranged in multiple along the circumferential direction of the damping ring.

[0055] In normal operation, the driving force is transmitted to the inner gear ring 14 through the rotating shaft, the outer shell 13 and the spring 19 in turn, and then the inner gear ring 14 is engaged with the rack 1 through the teeth of the inner gear ring 14, so as to drive the rack train to move. When the inner gear ring 14 is suddenly subjected to a large impact force, the elastic deformation of the spring 19 can cause a relative rotation angle between the inner gear ring 14 and the outer shell 13 along the circumferential direction, so as to buffer the impact force by the elastic deformation of the spring 19; and the impact force energy is absorbed and damped by the mutual friction between the upper damping ring 20 and the lower damping ring 21 and the side of the inner gear ring 14 near the inner gear ring central hole 141.

[0056] In summary, the rigid connection between the rack and the steel structure track is changed into an elastic connection in the present application, the rack is separated from the steel structure track by the elastic body connecting member, so as to avoid the problem of track resonance by vibration isolation, reduce the noise emitted by the rack train during operation on the steel structure track, reduce the harm caused by the noise to the human body and psychology, and reduce the influence of the noise on the environment. Through further improvement of the elastic body connecting member, the transverse stop block one and the transverse stop block two are arranged on the support bottom plate, and the transverse stop block one and the transverse stop block two are used when the rack train is running, so as to limit the rack in the transverse direction and reduce the transverse swing amplitude of the rack. The existing driving gear structure is improved into an elastic driving gear structure, so that when the driving gear has a certain elastic deformation amount, the influence of the impact force on the driving gear can be absorbed and eliminated by a certain amount of deformation when the driving gear is subjected to the impact force, further eliminating the vibration noise of the rack train during operation, and improving the service life of the driving gear.

[0057] The "multiple" in the embodiment refers to "two or more" in quantity. The above embodiments are only used to illustrate the present application, but not limit the present application, and those skilled in the art can make various changes or transformations without departing from the spirit and scope of the present application, therefore all equivalent technical solutions should belong to the protection scope of the present application, and the protection scope of the present application should be defined by the claims.

Claims

1. A method for vibration reduction and noise reduction during operation of an overhead rack-and-rail vehicle using a steel structure track, characterized in that: It is to set elastic body connecting piece between steel structure track and rack, connect rack on steel structure track through elastic body connecting piece, make rack elastically connect on steel structure track, carry out vibration reduction and noise reduction; The driving gear of the overhead rack rail vehicle is designed as an elastic driving gear, so that the driving gear has an elastic deformation amount, thereby further eliminating vibration and noise during operation of the rack rail vehicle; The elastic driving gear is designed as two parts of an outer shell and an inner ring gear, the inner ring gear and the outer shell are connected through an elastic damping mechanism, the outer shell is connected with a rotating shaft, and the teeth of the inner ring gear are engaged with the rack; during operation, driving force is transmitted to the inner ring gear through the rotating shaft and the outer shell in sequence, and then the driving force is transmitted to the rack through the engagement of the teeth of the inner ring gear and the rack, so as to drive the rack rail vehicle to move; The outer shell comprises an upper shell and a lower shell, the upper shell comprises a shell body and an axial sleeve arranged at the center of one side surface of the shell body, a plurality of grooves one are arranged on one side surface of the shell body and distributed along the circumference of the shell body in sequence, a lower shell center hole is opened at the center of one side surface of the lower shell, and a plurality of grooves two are arranged on one side surface of the lower shell and distributed along the circumference of the lower shell in sequence; An inner ring gear center hole is opened at the center of the side of the inner ring gear, and a plurality of openings are opened on the side of the inner ring gear and distributed along the circumference of the inner ring gear in sequence; The elastic damping mechanism comprises springs and damping members, the springs are arranged in plurality, each spring is arranged in an opening of the inner ring gear, and the two sides of the spring are exposed to the side of the inner ring gear to form spring exposed parts along the radial direction of the spring; During assembly, the axial sleeve of the upper shell is passed through the inner ring gear center hole of the inner ring gear and the lower shell center hole of the lower shell, so that the upper shell and the lower shell are fitted together, the inner ring gear is located between the upper shell and the lower shell, and the upper shell and the lower shell are connected through the connecting piece three; When the upper shell and the lower shell are connected, one groove one and one groove two correspond to each other, the one groove one and the side of the inner ring gear form a spring upper installation cavity, the one groove two and the other side of the inner ring gear form a spring lower installation cavity, the spring exposed part on one side of each spring is located in the spring upper installation cavity, and the two end faces of the spring exposed part on one side of each spring are in contact with the inner cavity wall of the spring upper installation cavity, the spring exposed part on the other side of each spring is located in the spring lower installation cavity, and the two end faces of the spring exposed part on the other side of each spring are in contact with the inner cavity wall of the spring lower installation cavity; The damping member comprises an upper damping ring and a lower damping ring, the lower damping ring is arranged between the lower shell and the side of the inner ring gear close to the inner ring gear center hole, the upper damping ring is arranged between the upper shell and the other side of the inner ring gear close to the inner ring gear center hole, a disc spring is arranged in the upper shell, and the side of the inner ring gear close to the inner ring gear center hole is pressed between the upper damping ring and the lower damping ring through locking screws and the disc spring.

2. The vibration and noise reducing method of claim 1, wherein: The elastic connecting piece is designed as two parts of a rubber support and a rack support structure; the rack is connected to the rack support structure, the rubber support is connected to the steel structure track, and the rack support structure is connected to the rubber support, so that the rack is elastically connected to the steel structure track.

3. The vibration and noise reducing method of claim 2, wherein: The rubber support is designed as two parts of a support bottom plate and a support top plate which is vulcanization-bonded to the support bottom plate; transverse stoppers one and two are arranged on the support bottom plate at positions on both sides of the support top plate in the transverse direction; the support top plate is used to connect the rack support structure, and the height of the support top plate is less than the height of the transverse stoppers one and two; gaps B are left between the support top plate and the transverse stoppers one and two.

4. The vibration and noise reducing method of claim 3, wherein: The rack support structure is designed as two parts of a connecting bottom plate and a rectangular tube which is welded to the connecting bottom plate; the rack is connected to the rectangular tube; The connecting bottom plate is connected to the support top plate of the rubber support, so that the rack support structure is connected to the rubber support; During operation, the connecting bottom plate is in contact with the transverse stoppers one and two, so that the rack can be transversely limited.

5. The vibration and noise reduction method of claim 4, wherein: When the rack car is running, the guide wheels one and two in the gear driving device of the rack car are located at opposite positions of the rectangular tube, and the guide wheels one and two are in contact with the rectangular tube.

6. The vibration and noise reducing method of claim 1, wherein: When the inner gear ring is suddenly subjected to a great impact force, the elastic deformation of the spring can cause a relative rotation angle between the inner gear ring and the outer shell in the circumferential direction, so that the elastic deformation of the spring is used for buffering; the upper and lower damping rings are used to absorb the impact energy by rubbing against the side of the inner gear ring near the central hole of the inner gear ring, so as to dampen vibration.

Images