CN111762210B

CN111762210B - Rack rail and adhered coaxial driving rack rail driving device and rack rail locomotive

Info

Publication number: CN111762210B
Application number: CN202010602463.0A
Authority: CN
Inventors: 廖志伟; 陈喜红; 张又孔; 陶功安; 沈龙江; 李冠军; 丁长权; 颜志军; 张文涛
Original assignee: CRRC Zhuzhou Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2021-06-04
Anticipated expiration: 2040-06-29
Also published as: CN111762210A

Abstract

The invention discloses a rack rail and adhesive coaxial driving rack rail driving device and a rack rail locomotive, wherein a driven large gear is arranged on an axle of the rack rail and adhesive coaxial driving rack rail locomotive through a bearing, a gear shaft (83) and a rack rail side shaft sleeve (84) are arranged on the axle on one side of the driven large gear through the bearing, an adhesive side shaft sleeve (85) is arranged on the axle on the other side of the driven large gear in an interference manner, the gear shaft and the rack rail side shaft sleeve are rigidly and fixedly connected into a whole, and the driven large gear is connected with the rack rail side shaft sleeve or the adhesive side shaft sleeve through a clutch; an eccentric mechanism (52) with a self-positioning and locking mechanism is mounted on the gear shaft through a bearing, a window is formed in the eccentric mechanism, and external teeth of the gear shaft are exposed out of the window; a rack wheel (51) is arranged on the eccentric mechanism through a bearing, and the rack wheel is internally engaged with the external teeth of the gear shaft. The invention can not only realize the height adjustment of the rack wheel, but also provide different reduction ratios for rack driving and adhesion driving.

Description

Rack rail and adhered coaxial driving rack rail driving device and rack rail locomotive

Technical Field

The invention relates to a driving device of a rail transit locomotive bogie, in particular to a rack rail and adhesive coaxial driving rack rail driving device and a rack rail locomotive.

Background

The existing rack rail driving device is divided into two forms in terms of functions, one is a driving device with a pure rack rail driving function, only has a rack rail driving function but has no adhering driving function, and other driving devices are required to be used as power to drive a rack rail train on an adhering line without a rack rail; the other type is a rack and adhesive coaxial drive driving device which has the functions of rack driving and adhesive driving, and driving force can be provided on both an adhesive line and a rack line without a rack to realize the driving of a rack train. Whether the height of a rack wheel of the single slave rack driving device is adjustable or not is divided into two types, namely the height of the rack wheel is adjustable and the height of the rack wheel is not adjustable. Therefore, the combination of the above forms in pairs can obtain 4 driving forms. At present, three types of pure rack rail driving rack rail wheels with unadjustable heights, pure rack rail driving rack rail wheels with adjustable heights and rack rails and adhesive coaxial driving rack rail wheels with unadjustable heights exist in the world, but the rack rail and adhesive coaxial driving rack rail wheels with adjustable heights have no height-adjustable rack rail and adhesive coaxial driving device in the world so far because the driving device with the rack rail and the adhesive coaxial driving rack rail wheels with adjustable heights is complex in structure, the wheel set driving installation space is seriously insufficient, and a complex transmission system meets the requirements of difficult realization of motor continuous performance at high and low speeds.

The conventional rack and pinion driving device driven by an adhesive coaxial is shown in chinese patent CN105599777A, and the rack driving and the adhesive driving at different time periods are realized by installing a hollow shaft on an axle through a bearing, installing a rack wheel on the hollow shaft, and switching and connecting between an adhesive gear and the rack wheel through a power transmission device. Although the conversion between the rack drive and the adhesion drive is realized only by one set of power transmission device, after the rack wheel runs for a period of time, a gap exists between the rack and the rack wheel due to the unadjustable height of the rack wheel and the abrasion of the wheel and the rail, so that the meshing performance of the rack and the rack wheel is damaged, and the rack drive cannot be efficiently carried out.

Chinese patent CN109532888A discloses a rack wheel height adjusting mechanism and a rack wheel driving device, which is a non-pure rack driving device, but its adhesive wheel set is separated from the driving device, and only plays a role of supporting and guiding, so it is not a rack and adhesive coaxial driving device.

Disclosure of Invention

The invention aims to solve the technical problem that the height of a rack wheel of the existing rack and adhesive coaxial driving device is not adjustable, and provides a rack driving device and an adhesive coaxial driving rack locomotive which can adjust the height of the rack wheel according to the abrasion degree of the rack and the rack wheel and provide different reduction ratios for rack driving and adhesive driving.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a rack and rack driving device driven by adhesion and coaxiality comprises a traction motor and an axle, wherein the traction motor is connected with a gear reduction unit through a coupling, wheels are arranged at two ends of the axle in an interference manner, a driven large gear of the gear reduction unit is arranged on the axle through a bearing, a gear shaft and a rack side shaft sleeve are arranged on the axle at one side of the driven large gear through a bearing, an adhesion side shaft sleeve is arranged on the axle at the other side of the driven large gear in an interference manner, the gear shaft and the rack side shaft sleeve are rigidly and fixedly connected into a whole, and the driven large gear is connected with the rack side shaft sleeve or the adhesion side shaft sleeve through a clutch; an eccentric mechanism with a self-positioning and locking mechanism is mounted on the gear shaft through a bearing, a window is formed in the eccentric mechanism, and external teeth of the gear shaft are exposed out of the window; and a rack wheel is arranged on the eccentric mechanism through a bearing, and the rack wheel is internally engaged with the external teeth of the gear shaft.

The toothed rail drive and the adhesion drive share the same axle, traction and braking force are provided for the toothed rail wheel positioned in the middle on the toothed rail line, and the traction and braking force are provided by the friction between the wheels on two sides and the steel rail on the adhesion line. The gear rack drive and the adhesion drive are both driven by the same traction motor and share the same gear reduction unit, the gear rack drive and the adhesion drive are switched by the clutch, and the clutch has three positions of 'left', 'middle' and 'right', and respectively executes three functions of 'gear rack drive', 'idle running' and 'adhesion drive'.

Because the driving device has the functions of rack driving and adhesion driving, a train provided with the driving device runs on an adhesion line at a high speed and a long distance, wheels on two sides of the driving device are easy to abrade, the abrasion loss is large, and the driving device usually exceeds the requirement of the center distance between the rack and the rack to be adhered and cannot be meshed normally. When the wheels are worn, the distance between the bogie and the rail surface is reduced, the center distance between the rack rail wheel and the rack rail is correspondingly reduced, and once the meshing requirement of the rack and the pinion cannot be met, the vehicle must be maintained. In order to reduce the maintenance workload and the operation and maintenance cost of the vehicle, the invention arranges the eccentric mechanism with self-positioning and locking mechanism on the premise of not reforming the vehicle and the line, and the rotation of the eccentric mechanism is isolated from the rotation of the axle and the gear rack wheel, therefore, the position of the center of the rack wheel from the center of the axle can be changed through the rotation of the eccentric mechanism to realize the height adjustment of the rack wheel, so that the height of the rack wheel from the rail surface is always kept in a reasonable meshing center distance range, the normal meshing of the rack wheel and the rack bar after the abrasion of the wheels is ensured, the total running mileage of the train can be improved, even if the structural maintenance of the rack transmission device is not needed within the wheel abrasion limit of the common train, the height of the rack wheel is only needed to be simply processed and adjusted, and the train can be continuously put into use, so that the operation and acquisition cost of the train is greatly reduced.

In addition, because the maximum running speed (120 km/h) and the continuous speed of the adhesion drive are greatly different from the maximum running speed (40 km/h) and the continuous speed of the rack rail drive, the rack rail drive needs a larger transmission ratio than the adhesion drive to meet the requirement that the traction motors share the same traction characteristic to adapt to the high-speed and low-speed performance of the rack rail train. The eccentric mechanism is provided with the window, the axle is sleeved with the gear shaft in an empty way (mounted through the bearing), the eccentric mechanism is sleeved with the rack wheel in an empty way, and the external teeth of the gear shaft are internally meshed with the rack wheel at the window, so that the first-stage transmission is increased, different reduction ratios are provided for rack driving and adhesion driving, and the low-speed traction of the rack driving can be smoothly converted from the adhesion driving without greatly adjusting the rotating speed of the traction motor. Preferably, the clutch includes actuating mechanism, shift fork, rack side end ring gear, the side ring gear that adheres, actuating mechanism's output shaft fixed connection the shift fork, the shift fork has first declutch shift lever and second declutch shift lever, first declutch shift lever fixed connection rack side end ring gear, second declutch shift lever fixed connection the side ring gear that adheres, rack side end ring gear internal gearing the rack side axle sleeve, the side ring gear internal gearing that adheres the side axle sleeve, just rack side end ring gear with the opposite face of the side ring gear that adheres is equipped with the end face tooth, when the shift fork moved right, the end face tooth of rack side end ring gear with the end face tooth block of driven gear wheel one side, when the shift fork moved left, the end face tooth of the side ring gear that adheres with the end face tooth block of driven gear wheel opposite side.

Preferably, the outer rings of the rack side end toothed ring and the adhesion side end toothed ring are respectively provided with an annular groove for clamping the first shifting fork rod or the second shifting fork rod.

Preferably, the rack wheel includes the first tooth hub of taking the internal tooth, the ring gear of taking the external tooth, do not take the second tooth hub of internal tooth, tangential spring assembly, first tooth hub passes through bolt fixed connection with the second tooth hub, the ring gear cover is established on first, two tooth hubs, just set up tangential spring assembly between ring gear and first, the two tooth hubs, when the external tooth of the ring gear of rack wheel and the rack on the circuit meshing, through the pulling-up and the compression of tangential spring assembly can make the ring gear have slight circumference to move relative first, two tooth hubs to the pitch error when compensating rack wheel and rack meshing, impact the buffering damping effect to the meshing simultaneously.

Preferably, the eccentric mechanism is an eccentric hollow shaft.

Preferably, a locking device is arranged between the eccentric mechanism and the frame, so that the position of the eccentric mechanism can be relatively limited.

Preferably, the locking device comprises a limiting plate fixedly mounted on the eccentric mechanism, a plurality of first positioning holes corresponding to different gear wheel height positions are formed in the limiting plate, second positioning holes corresponding to the first positioning holes one to one are formed in the rack, and the first positioning holes are connected with the second positioning holes through positioning pins. The eccentric mechanism can be rotated by rotating the limiting plate, so that the height of the circle center of the outer cylindrical surface of the eccentric mechanism is changed, namely, the height of the center of the rack wheel from the rail surface is changed, and after the height of the rack wheel is adjusted in place, the height position of the rack wheel is locked by the connection of the first positioning hole and the second positioning hole.

Preferably, an expansion rod is fixedly connected between the eccentric mechanism and the frame so as to avoid axial shaking of the eccentric mechanism.

Based on the same inventive concept, the invention also provides a rack rail locomotive vehicle which comprises the rack rail and a rack rail driving device which is driven by the adhesion coaxial.

In summary, the present invention has the following features:

1. the rack and the adhesion coaxial hybrid drive.

2. The gear rack and the adhesive drive are switched by the clutch.

3. The rack rail drive and the adhesion drive share the same traction motor, the same gear reduction device and the same set of traction converter system.

4. The gear rail wheel is vertically installed and is positioned in the middle of the wheel pair.

5. The rack-rail wheel is driven by an eccentric mechanism and an inner meshing gear of a transmission gear (gear shaft) of the axle to realize the eccentricity of the rack-rail wheel and the axle, and the height of the rack-rail wheel from the rail surface can be adjusted by adjusting the eccentric mechanism.

6. The rack and pinion gear is of a split structure, a tangential spring set is arranged between the gear ring of the rack and pinion gear and the first and second gear hubs, brake drums for braking vehicles during rack driving are arranged on two sides of the rack and pinion gear, and an inner gear ring for driving the rack is arranged in an inner hole of the rack and pinion gear.

7. The driven bull gear is arranged on the axle through a bearing, and the motion of the driven bull gear and the wheel pair is decoupled.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention solves the problem of the rail transit vehicle driving scheme that the tooth track line and the adhesive line coexist, the train can not only meet the high-speed running of the adhesive line, but also the highest running speed of the train reaches 120 km/h; meanwhile, the requirement of low-speed and large-gradient operation of a rack rail line is met, and the climbing capacity of the rack rail line is improved to 250 per thousand to the maximum.

2. The invention simplifies the vehicle configuration by coaxially designing the adhesion drive and the rack drive, fully exerts the functions of a set of traction motor, a gear reduction device and a traction braking system, and simultaneously greatly reduces the self weight of the whole train.

3. The height of the rack wheel can be adjusted through the eccentric mechanism, the influence of the abrasion of the wheels of the high-speed train on the height of the rack wheel is well solved, and when the abrasion of the wheels reaches a certain degree, the wheels do not need to be replaced to adapt to the meshing transmission of the rack wheel, so that the vehicle application cost and the vehicle maintenance workload are greatly reduced.

4. The loading of the rack device uses the created rack train as the world initiative, and the rack device is a novel, high-quality, safe, reliable and economic rack train, and the birth of the novel vehicle can generate huge social effect and economic effect. At present, the applicant has already reached a vehicle purchase agreement with tourism companies such as Zhang Jia Jie Qixing Xianshan and Du Si project, and the successful application of the agreement will be attractive to all ages.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a rack drive device for driving a rack and an adhesive coaxial according to the present invention.

FIG. 2 is a schematic diagram of the rack and bonded coaxial drive of the present invention.

Fig. 3 is a sectional view a-a of fig. 2.

Fig. 4 is a schematic structural view of a driven gearwheel of the gear reduction unit.

Fig. 5 is a schematic diagram of the clutch structure.

Fig. 6 is a perspective view of the adhesive side toothed ring.

Fig. 7 is a schematic perspective view of the rack drive system.

Fig. 8 is a structural diagram of the rack and pinion.

Fig. 9 is an exploded view of components of the gear wheel.

Fig. 10 is a perspective view of the eccentric mechanism.

Fig. 11 is a wheel set assembly structure view.

Fig. 12 is a view showing an assembly structure of a pinion shaft and a rack side sleeve.

Fig. 13 is a perspective view of the adhesive-side boss.

Fig. 14 is an assembly structural view of the gear shaft and the eccentric mechanism.

Fig. 15 is a schematic diagram of the height adjustment of the rack wheel according to the present invention, wherein a) is before adjustment and b) is after adjustment.

FIG. 16 is a first structural view of the height adjustment locking device of the coaxial driving device of the adhesion and rack of the present invention.

FIG. 17 is a second structural view of the height adjustment locking device of the coaxial driving device of the adhesion and rack of the present invention.

In the figure:

1. a traction motor; 2. a coupling;

3. a gear reduction device; 31. a driven bull gear;

4. a clutch; 41. a drive mechanism; 42. a shifting fork; 43. a toothed ring at the side end of the toothed rail; 44. an adhesive side end toothed ring; 421. A first yoke lever; 422. a second fork lever; 431. 441, an annular groove; 432. 442, face teeth; 443. spline teeth;

5. a rack drive system; 51. a rack and pinion gear; 52. an eccentric mechanism; 511. A first hub gear; 512. A ring gear; 513. a second hub; 514. a tangential spring set; 521. an inner cylindrical surface; 522. an outer cylindrical surface; 523. a window; 5111. internal teeth; 5121. an outer tooth;

6. a frame; 61. a second positioning hole;

7. a locking device; 71. fixing the bolt; 72. a limiting plate; 73. positioning pins; 74. a tightening rod; 721. a first positioning hole;

8. assembling wheel sets; 81. an axle; 82. a wheel; 83. a gear shaft; 84. a rack rail side shaft sleeve; 85. an adhesive side sleeve; 831. an outer tooth; 832. a bearing support surface; 86. a bearing seat;

9. a band brake device; 10. motor hangs seat.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

For convenience of description, the relative positional relationship of the components, such as: the descriptions of the upper, lower, left, right, etc. are described with reference to the layout directions of the drawings in the specification, and do not limit the structure of the present patent.

As shown in fig. 1-14, the rack drive device of the invention comprises a traction motor 1, a coupling 2, a gear reduction unit 3, a clutch 4, a rack drive system 5, a frame 6, a locking device 7, a wheel pair assembly 8, a belt type brake device 9 and a motor hanging seat 10.

The traction motor 1 is fixedly arranged on the frame 6. The output shaft of the traction motor 1 is connected to the driving pinion shaft of the gear reduction unit 3 via a coupling 2 having an overload protection function.

The driven gearwheel 31 of the gear reduction unit 3 is fitted around the axle 81 via bearings, and the two sides of the driven gearwheel 31 are provided with end teeth 311.

The clutch 4 includes a driving mechanism 41, a shift fork 42, a rack-side toothed ring 43, and an adhesion-side toothed ring 44, the driving mechanism 41 is mounted on the casing of the gear reduction unit 3, the shift fork 42 having first and

second shift levers

421 and 422 is fixedly connected to an output shaft of the driving mechanism 41, the rack-side toothed ring 43 is fixedly connected to an end of the first shift lever 421, and the adhesion-side toothed ring 44 is fixedly connected to an end of the second shift lever 422. The drive mechanism 41 is preferably an electric push rod. The inner bores of the rack side end ring gear 43 and the adhesion side end ring gear 44 are respectively provided with spline teeth, the outer ring is respectively provided with

annular grooves

431, 441, and the opposite sides of the rack side end ring gear 43 and the adhesion side end ring gear 44 are respectively provided with end face

teeth

432, 442.

The rack drive system 5 includes a rack wheel 51 and an eccentric mechanism 52. The gear-rail wheel 51 comprises a first gear hub 511 with internal teeth 5111, a gear ring 512 with external teeth 5121, a second gear hub 513 without internal teeth, and a tangential spring set 514, wherein the first gear hub 511 and the second gear hub 513 are fixedly connected through bolts, the gear ring 512 is sleeved on the first and

second gear hubs

511 and 513, the tangential spring set 514 is arranged between the gear ring 512 and the first and

second gear hubs

511 and 513, when the external teeth 5121 of the gear ring 512 of the gear-rail wheel 51 are meshed with the gear-rail bars on the circuit, the gear ring 512 can slightly move circumferentially relative to the first and

second gear hubs

511 and 513 through the pulling and the compression of the tangential spring set 514 so as to compensate the pitch error when the gear-rail wheel 51 is meshed with the gear-rail bars, and simultaneously has a buffer and vibration damping effect on meshing impact. The eccentric mechanism 52 is a window type eccentric hollow shaft, that is, the eccentric mechanism 52 has an inner cylindrical surface 521, an outer cylindrical surface 522, and a window 523 communicating the inner and outer

cylindrical surfaces

521, 522. The rack gear 51 is mounted on the eccentric mechanism 52 through a bearing.

The wheelset assembly 8 includes an axle 81, wheels 82, a gear shaft 83, a rack-side bushing 84, and an adhesion-side bushing 85. The axle 81 is connected at both ends thereof to the wheels 82 by interference fit. The gear shaft 83 and the rack-side bushing 84 are respectively mounted on the axle 81 through bearings, and the left side of the rack-side bushing 84 is rigidly connected integrally with the gear shaft 83. The outer ring of the rack-side boss 84 is provided with spline teeth, and the outer periphery of the gear shaft 83 is provided with outer teeth 831. The adhesion side sleeve 85 is connected with the axle 81 by interference fit, and spline teeth are provided on the outer ring of the adhesion side sleeve 85.

The eccentric mechanism 52 is mounted on the gear shaft 83 through a bearing, the inner hole spline teeth of the rack side ring gear 43 are engaged with the outer ring spline teeth of the rack side sleeve 84, the inner hole spline teeth of the adhesion side ring gear 44 are engaged with the outer ring spline teeth of the adhesion side sleeve 85, and at the window 523 of the eccentric mechanism 52, the outer teeth 831 of the gear shaft 83 are exposed out of the window 523, the outer teeth 831 of the gear shaft 83 exposed out of the window 523 are engaged with the inner teeth 5111 of the rack gear 51, when the driving mechanism 41 drives the shift fork 42 to move leftward, the shift fork 42 drives the rack side ring gear 43 and the adhesion side ring gear 44 to move leftward on the spline teeth of the rack side sleeve 84 and the adhesion side sleeve 85 through its fork lever, the end face teeth 432 of the side ring gear 43 side face are separated from the rack side end face teeth of the driven large gear 31, the end face teeth 442 of the adhesion side ring gear 44 are engaged with the adhesion side end face teeth of the driven large gear 31, the driven gearwheel 31 drives the wheel 82 to rotate through the adhesion side end toothed ring 44, the adhesion side shaft sleeve 85 and the axle 81, so as to realize adhesion driving; when the driving mechanism 41 drives the shift fork 42 to move rightward, the shift fork 42 drives the rack-side toothed ring 43 and the adhesion-side toothed ring 44 to move rightward on the spline teeth of the rack-side bushing 84 and the adhesion-side bushing 85, respectively, the end face teeth 442 on the side face of the adhesion-side toothed ring 44 are separated from the end face teeth on the adhesion side of the driven large gear 31, the end face teeth 432 on the side face of the rack-side toothed ring 43 are engaged with the rack-side end face teeth of the driven large gear 31, and when the end face teeth 432 of the rack-side toothed ring 43 are engaged with the end face teeth 311 of the driven large gear 31, the driven large gear 31 drives the rack wheel 51 to rotate through the rack-side toothed ring 43, the rack-side bushing 84, and the gear shaft 83, thereby.

The window 523 is sized to expose the outer teeth 831 of the pinion shaft 83 which engage the inner teeth of the rack gear.

The locking device 7 comprises a limiting plate 72 which is installed on the eccentric mechanism 52 through a fixing bolt 71, a plurality of first positioning holes 721 corresponding to different height positions are arranged on the limiting plate 72, second positioning holes 61 which are in one-to-one correspondence with the first positioning holes 721 are arranged on the rack 6, the limiting plate 72 can be used for rotating the eccentric mechanism 52 when the height of the rack wheel 51 is adjusted, after the height of the rack wheel is adjusted to be in place, the first positioning holes 721 on the limiting plate 72 and the second positioning holes 61 on the rack 6 can be accurately aligned, a positioning pin 73 is inserted into the first positioning holes 721 and the second positioning holes 61 to be aligned to play a role in preventing and loosening prevention, and the position of the eccentric mechanism 52 is determined.

The rack driving device has the functions of rack driving and adhesion driving, and can also adjust and lock the height of the rack wheel. The adhesive drive, rack wheel height adjustment and locking will be described in detail below:

1) adhesive drive

The traction motor 1 outputs movement and torque, the movement and torque are transmitted to the driven large gear 31 of the gear reduction device 3 through the coupler 2, when the driving mechanism 41 of the clutch 4 drives the shifting fork 42, and the shifting fork 42 drives the rack side end toothed ring 43 and the adhesion side end toothed ring 44 to move left, so that the adhesion side end toothed ring 44 is meshed with the end face teeth 311 of the driven large gear 31 which is sleeved on the axle 81, the adhesion side end toothed ring 44 is meshed with the spline teeth of the adhesion side shaft sleeve 85 which is in interference fit with the axle 81 through the spline teeth of the inner hole of the adhesion side end toothed ring 44, the axle 81 transmits movement and force to the wheel 82, and the wheel 82 realizes adhesion driving of the vehicle through friction with the steel rail.

2) Toothed rail drive

The motion and torque output by the traction motor 1 are transmitted to the driven large gear 31 of the gear reduction unit 3 through the coupling 2, when the driving mechanism 41 of the clutch 4 drives the shift fork 42, and the rack-side toothed ring 43 and the adhesion-side toothed ring 44 are driven to move right through the shift fork 42, so that the rack-side toothed ring 43 is meshed with the end face teeth 311 of the driven large gear 31 which is freely sleeved on the axle 81, the rack-side toothed ring 43 is meshed with the rack-side bushing 84 which is freely sleeved on the axle 81 through the internal spline thereof, the rack-side bushing 84 is integrally connected with the gear shaft 83, the external teeth of the gear shaft 83 are meshed with the internal teeth 5111 of the rack gear 51 of the rack driving system 5, and thus the motion and force are transmitted to the rack on the line by the rack gear 51, and the rack driving is realized by the rack gear 51 being meshed with the rack.

3) Height adjustment of rack rail wheel

Since the rack gear 51 is eccentric with respect to the axle 81, the center of the rack gear is offset with respect to the axle center by rotating the eccentric mechanism 52 around the axle 81, and the vertical component thereof is the adjustment amount of the track tread height. When the adjustment amount is appropriate, the eccentric mechanism 52 can be fixed by the locking device 7 on the frame 6, and the adjustment step length can be set according to actual needs. The eccentric installation of the rack wheel 51 can not only realize the height adjustment of the rack wheel 51, but also provide convenience for the eccentric motion of the rack driving device, and the external teeth 831 of the gear shaft 83 are conveniently meshed with the internal teeth 5111 of the rack wheel 51 by opening a window 523 on the side wall of the eccentric mechanism 52, so that a first-stage transmission ratio is increased, and the rack wheel 51 is further decelerated to meet the speed requirement of the rack driving. In this way, no matter how the eccentric mechanism 52 rotates, the relative position of the exposed external teeth of the gear shaft 83 and the center of the outer cylindrical surface 522 of the eccentric mechanism 52 is kept unchanged, so that the internal meshing transmission relationship between the gear shaft 83 and the rack wheel 51 is ensured to be unchanged.

Fig. 15 shows the principle of adjusting the height of the rack wheel according to the present invention, wherein: point O is a common center point of the wheel 82 and the inner cylindrical surface of the eccentric mechanism 52, O_1、 O₁' is the common central point of the gear wheel and the outer cylindrical surface of the eccentric mechanism 52, and when the eccentric mechanism 52 rotates clockwise around the point O, O₁Relative O point is gradually increased to O₁' so that the height from the center of the gear wheel to the rail surface is continuously increased, and conversely, the height from the center of the gear wheel to the rail surface is gradually reduced.

4) Locking of height adjustment device

The eccentric mechanism 52 is stationary with the frame 6 relative to the vehicle during operation of the vehicle. After the height of the rack wheel is adjusted, the eccentric mechanism 52 needs to be fixed and locked. The specific implementation is shown in fig. 16 and 17: a limiting plate 72 is fixedly arranged at one end of the eccentric mechanism 52, the limiting plate 72 can be used for rotating the eccentric mechanism 52 during height adjustment, the rack wheel can be accurately fixed on the rack 6 after being adjusted in position, first positioning holes 721 with different height positions are formed in the limiting plate 72, meanwhile, second positioning holes 61 which are in one-to-one correspondence are arranged on the rack 6, after the rack wheel 51 is adjusted in position, the limiting plate 72 and a group of first and second positioning holes in the rack 6 are aligned accurately, a positioning pin 73 is inserted into the aligned first and second positioning holes, and the positioning pin 73 is fixed on the rack 6 to realize anti-disengagement and anti-loosening, so that the height position of the center of the outer cylindrical surface 522 of the eccentric mechanism 52 is determined. In this embodiment, the setting of the positions of the first and second positioning holes 721, 61 can ensure that the step of adjusting the height of the rack wheel is 5 mm.

Since the rack gear 51 is mounted on the eccentric mechanism 52 and receives the traction force and the braking force of the rack drive, the eccentric mechanism 52 needs to be locked. By providing the expansion rod 74 at the corresponding position of the limit plate 72, the expansion rod 74 is tightly coupled to the frame 6 by the fastening nut 75, so that the eccentric mechanism 52 is locked to the frame 6.

The above embodiment is only one of the preferable schemes of the present invention, and the present invention is not limited to the above structure, for example, the clutch of the present invention may also adopt a friction plate clutch, the engagement between the rack wheel and the gear shaft of the present invention may also adopt a planetary gear transmission mode according to the requirements of space, transmission ratio and the like of the driving device, and the locking mode of the eccentric mechanism in the embodiment of the present invention is a step adjustment, and obviously, the locking mode may also be set as a stepless adjustment.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims

1. A rack and rack driving device driven by adhesion and coaxiality comprises a traction motor (1) and an axle (81), wherein the traction motor is connected with a gear reduction device (3) through a coupling (2), wheels (82) are arranged at two ends of the axle in an interference manner, the rack and rack driving device is characterized in that a driven large gear (31) of the gear reduction device is arranged on the axle through a bearing, a gear shaft (83) and a rack side shaft sleeve (84) are arranged on the axle at one side of the driven large gear through the bearing, an adhesion side shaft sleeve (85) is arranged on the axle at the other side of the driven large gear in an interference manner, the gear shaft and the rack side shaft sleeve are rigidly and fixedly connected into a whole, and the driven large gear is connected with the rack side shaft sleeve or the adhesion side shaft sleeve through a clutch; an eccentric mechanism (52) with a self-positioning and locking mechanism is mounted on the gear shaft through a bearing, a window (523) is formed in the eccentric mechanism, and external teeth of the gear shaft are exposed out of the window; a rack wheel (51) is arranged on the eccentric mechanism through a bearing, and the rack wheel is internally engaged with the external teeth of the gear shaft.

2. A rack and pinion drive device of an adhesive coaxial drive according to claim 1, characterized in that said clutch comprises a drive mechanism (41), a shift fork (42), a rack-side toothed ring (43), an adhesive-side toothed ring (44), an output shaft of said drive mechanism being fixedly connected to said shift fork, said shift fork having a first shift rod (421) and a second shift rod (422), said first shift rod being fixedly connected to said rack-side toothed ring, said second shift rod being fixedly connected to said adhesive-side toothed ring, said rack-side toothed ring being engaged with said rack-side sleeve, said adhesive-side toothed ring being engaged with said adhesive-side sleeve, and the facing surfaces of said rack-side toothed ring and said adhesive-side toothed ring being provided with end surface teeth, said end surface teeth of said rack-side toothed ring engaging with the end surface teeth on the side of said driven gearwheel when said shift fork is moved to the right, when the shifting fork moves leftwards, the end face teeth of the adhering side end tooth ring are clamped with the end face teeth on the other side of the driven large gear.

3. A rack and pinion drive device of claim 2, wherein the outer rings of the rack-side toothed ring and the adhesive-side toothed ring are respectively provided with an annular groove for engaging with the first fork lever or the second fork lever.

4. A rack and pinion drive as claimed in claim 1 wherein said rack and pinion comprises a first hub (511) with internal teeth (5111), a ring gear (512) with external teeth (5121), a second hub (513) without internal teeth, a tangential spring set (514), said first and second hubs being fixedly connected by bolts, said ring gear being fitted over said first and second hubs and said tangential spring set being disposed between said ring gear and said first and second hubs.

5. A rack and pinion drive with adhesive coaxial drive as claimed in claim 1 wherein said eccentric mechanism is an eccentric hollow shaft.

6. A rack and pinion drive with adhesive coaxial drive according to claim 1, characterized in that a locking device (7) is arranged between the eccentric mechanism and the machine frame (6).

7. The rack and pinion driving device with adhesive coaxial driving as claimed in claim 6, wherein the locking device comprises a limiting plate (72) fixedly mounted on the eccentric mechanism, the limiting plate is provided with a plurality of first positioning holes (721) corresponding to different height positions of the rack wheel, the rack is provided with second positioning holes (61) corresponding to the first positioning holes one by one, and the first positioning holes and the second positioning holes are connected through positioning pins (73).

8. A rack and pinion drive with adhesive coaxial drive according to claim 6, characterized in that a tightening rod (74) is fastened between the eccentric mechanism and the machine frame.

9. A rack rolling stock comprising a rack as claimed in any one of claims 1 to 8 and a rack drive means for an adhesive coaxial drive.