Track travel system

Abstract

The present invention discloses a track travel system, comprising: a vehicle, comprising a traveling wheel, the traveling wheel comprising a rotatable gear, a guide wheel coaxial with the gear and located on the inner side of the vehicle relative to the gear, the diameter of the guide wheel being larger than the diameter of the tooth top circle of the gear; a first movable track for vehicle travel, comprising a rack and a guide portion located on one side of the rack along the tooth width direction, the guide portion comprising a first guide bar and a second guide bar which are arranged opposite to each other and extend in the same direction as the rack, the distance between the first guide bar and the second guide bar being larger than the diameter of the guide wheel, the first movable track having a matching area, the first movable track being configured as follows: in a process in which the traveling wheel moves along the tooth width direction of the rack and matches with the matching area of ​​the first movable track, the gear passes through the first guide bar and the second guide bar and then engages with the rack, and when the gear engages with the rack, the guide wheel is located between the first guide bar and the second guide bar.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics, and in particular to a track travel system. Background Art

[0002] Rail systems, such as those used in freight and warehousing logistics, often utilize rails and vehicles like logistics vehicles to transport and move goods. Rail systems typically include multiple tracks, and vehicles frequently need to switch between them. Therefore, the ease with which vehicles enter the tracks, as well as the stability and reliability of their operation once on the tracks, are becoming increasingly important. Summary of the Invention

[0003] The object of the present invention is to provide a track travel system, in which the process of a vehicle entering a moving track is more convenient, and the vehicle running on the track after entering the track is more stable and reliable.

[0004] The present invention discloses a track travel system, comprising:

[0005] A vehicle comprising a running wheel, the running wheel comprising a rotatable gear and a guide wheel coaxial with the gear and located on an inner side of the vehicle relative to the gear, wherein the diameter of the guide wheel is larger than the diameter of the tooth tip circle of the gear;

[0006] The first movable track is used for the vehicle to travel, and includes a rack and a guide part located on one side of the rack along the tooth width direction, and the guide part is used to guide the guide wheel when the vehicle travels on the first movable track, and the guide part includes a first guide bar and a second guide bar which are arranged relatively to each other and extend in the same direction as the rack, and the distance between the first guide bar and the second guide bar is greater than the diameter of the guide wheel, and the first movable track has a matching area for matching with the traveling wheel when the traveling wheel starts to enter the first movable track, and the first movable track is configured as follows: in the process of the traveling wheel moving along the tooth width direction of the rack to match with the matching area of ​​the first movable track, the gear passes through the first guide bar and the second guide bar and engages with the rack, and when the gear engages with the rack, the guide wheel is located between the first guide bar and the second guide bar.

[0007] In some embodiments, the first guide bar is provided with a first rib on a side away from the rack, which protrudes toward the second guide bar and extends in the same direction as the rack. The second guide bar is provided with a second rib on a side away from the rack, which protrudes toward the first guide bar and extends in the same direction as the rack. The first rib and the second rib are respectively provided with two open grooves with opposite notches in the matching area. The open grooves are used for the traveling wheel to pass through the gear and the guide wheel when entering the first moving track. The distance between the first rib and the second rib is less than the diameter of the guide wheel, and the distance between the bottom of the opening groove of the first rib and the bottom of the opening groove of the second rib is greater than the diameter of the guide wheel.

[0008] In some embodiments, the first guide bar and the second guide bar are respectively provided with a first notch and a second notch opposite to each other in the mating area on the sides away from the rack, and the first notch and the second notch form an entrance for the traveling wheel to enter the first moving track. The distance between the bottom wall of the first notch and the bottom wall of the second notch is greater than the diameter of the guide wheel and the distance between the bottom wall of the first notch and the bottom wall of the second notch gradually decreases along the direction in which the traveling wheel enters the first moving track.

[0009] In some embodiments, the first guide bar is provided with a third side rib on a side close to the rack, which protrudes toward the second guide bar and extends in the same direction as the rack, and the second guide bar is provided with a fourth side rib on a side away from the rack, which protrudes toward the first guide bar and extends in the same direction as the rack, and the distance between the third side rib and the fourth side rib is less than the diameter of the guide wheel.

[0010] In some embodiments, the first movable track is further provided with only one guide tooth and a reset device provided between the guide tooth and the rack in the matching area, the guide tooth is provided on one side of the rack along the tooth width direction and is movably provided relative to the rack, and the matching area is configured as follows: when the traveling wheel starts to enter the first movable track, when the gear moves axially along the traveling wheel and approaches the rack, the guide tooth contacts the gear teeth to guide the gear to a circumferential position where it can engage with the rack, and after the guide tooth is pressed by the gear and approaches the rack, the reset device resets the guide tooth in a direction away from the rack.

[0011] In some embodiments, in the matching area, the first movable track further includes a mounting member slidably connected to the rack, and the guide teeth are provided on the mounting member.

[0012] In some embodiments, the resetting device includes an elastic member disposed between the rack and the mounting member.

[0013] In some embodiments, in the mating area, the rack includes a blind hole extending along the tooth width direction, the bottom surface of the blind hole and the opening of the blind hole are respectively located at opposite ends of the rack along the tooth width direction of the rack, and the elastic member is arranged in the blind hole.

[0014] In some embodiments, in the mating area, the rack further includes a through hole extending along the tooth width direction, the mounting member includes a sliding member that is gap-fitted with the through hole and a plate body fixedly connected to the sliding member, and the guide tooth is provided on the plate body.

[0015] In some embodiments, the sliding member includes a pin shaft that is loosely fitted with the through hole. The pin shaft is located outside the through hole and is provided with a ring plate on the end away from the plate body. The diameter of the ring plate is larger than the diameter of the through hole.

[0016] In some embodiments, the first movable track further includes a core shaft inserted into the through hole and fixedly connected to the rack, and the sliding member includes a sleeve sleeved on the outside of the core shaft, and the sleeve is in clearance fit with the core shaft.

[0017] In some embodiments, in the mating area, the rack further includes a groove provided at one end along the tooth width direction, and the plate body is located in the groove.

[0018] In some embodiments, along the tooth width direction of the rack, the guide tooth is provided with a first pointed portion, and the tip of the first pointed portion faces away from the rack.

[0019] In some embodiments, the first pointed portion includes two inclined surfaces located on both sides of the tip, and the inclined surfaces are inclined toward a direction close to the rack.

[0020] In some embodiments, the tip is inclined toward the direction approaching the rack.

[0021] In some embodiments, the gear teeth of the gear are provided with a second pointed portion on the end face facing away from the vehicle, and when the gear moves axially along the traveling wheel and approaches the rack, the tip of the second pointed portion faces the rack.

[0022] In some embodiments, the track travel system is configured so that when the traveling wheel cooperates with the mating area and the gear moves axially along the traveling wheel close to the rack, the axis of the gear and the center line of the guide tooth are at different positions along the extension direction of the rack.

[0023] In some embodiments, the track travel system further includes a second movable track for the vehicle to travel, and the cooperation area is used to cooperate with the travel wheel when the vehicle changes track from the second movable track to the first movable track.

[0024] In some embodiments, the first movable track is a vertical track, the second movable track is a horizontal track, the first movable track includes a U-shaped column surrounding the outside of the guide portion and the rack and extending in the vertical direction, and the first guide bar and the second guide bar are respectively arranged on two opposite inner walls of the U-shaped column.

[0025] In some embodiments, the first moving track is a vertical track, the track travel system includes a plurality of second moving track intersecting with the first moving track and distributed in the vertical direction, the second moving track is a horizontal track, the second moving track includes a first sub-horizontal track and a second sub-horizontal track extending in the same direction, arranged at intervals, and both intersecting with the first moving track, and the distance between the first sub-horizontal track and the second sub-horizontal track is smaller than the distance between the first guide bar and the second guide bar.

[0026] The track travel system provided by the present invention comprises a guide portion having a first guide bar and a second guide bar, and by arranging the vehicle's travel wheels coaxially with the gear and guide wheel, and positioning the guide wheel inside the gear and having a diameter greater than the diameter of the gear's addendum. This allows the gear of the vehicle's travel wheel to conveniently pass through the guide portion and engage with the rack, thereby conveniently entering the travel track. After the gear and rack are engaged, the first guide bar and the second guide bar cooperate with the guide wheel to guide the vehicle's travel on the first travel track. Furthermore, the cooperation between the first guide bar and the second guide bar and the guide wheel ensures stable and reliable engagement between the gear and rack.

[0027] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 This is a schematic structural diagram of a track travel system according to an embodiment of the present invention;

[0030] Figure 2 for Figure 1 The right side structural diagram of the track travel system shown;

[0031] Figure 3for Figure 1 A schematic cross-sectional view of a vehicle of the track travel system shown;

[0032] Figure 4 for Figure 3 A schematic cross-sectional view of the vehicle in another state is shown;

[0033] Figure 5 for Figure 1 A schematic structural diagram of a partial structure of the track travel system shown;

[0034] Figure 6 for Figure 1 A schematic diagram of a portion of the structure of the track travel system from a main viewing angle is shown;

[0035] Figure 7 for Figure 5 A schematic structural diagram of a partial structure of the track travel system shown;

[0036] Figure 8 for Figure 1 A schematic diagram of the top view of the track travel system shown;

[0037] Figure 9 for Figure 1 The schematic structural diagram of the partial structure of the track travel system when the vehicle and the first moving track begin to cooperate;

[0038] Figure 10 for Figure 9 The schematic structural diagram of the partial structure of the track travel system when the vehicle and the first moving track begin to cooperate;

[0039] Figure 11 for Figure 10 an exploded view of a portion of the structure shown;

[0040] Figure 12 for Figure 10 Schematic diagram of a cross-sectional structure of part of the structure shown. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0043] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0044] like Figures 1 to 11 As shown, the track travel system of this embodiment includes a vehicle 1 and a first moving track 3.

[0045] The vehicle 1 includes running wheels, which include a rotatable gear 12 and a guide wheel 13 coaxial with the gear 12 and located on the inner side of the vehicle relative to the gear 12. The diameter of the guide wheel 13 is larger than the diameter of the tooth tip circle of the gear 12. In the logistics system, the vehicle includes a logistics vehicle.

[0046] The vehicle 1 travels on the moving track by the running wheels. The inner side of the vehicle refers to the side close to the center line of the vehicle extending along the travel direction, and the guide wheel 13 is closer to the center line of the vehicle than the gear 12.

[0047] like Figure 5 、 Figure 6 、 Figure 8 and Figure 9As shown, the first movable track is used for the travel of the vehicle 1. The first movable track includes a rack 32 and a guide portion located on one side of the rack 32 along the tooth width direction. The guide portion is used to guide the guide wheel 13 when the vehicle travels on the first movable track. The guide portion is located on the side of the rack 32 closest to the vehicle and includes a first guide bar 311 and a second guide bar 312 arranged opposite each other and extending in the same direction as the rack 32. The distance between the first guide bar 311 and the second guide bar 312 is greater than the diameter of the guide wheel 13. The first movable track has a mating area for mating with the traveling wheel when the traveling wheel begins to enter the first movable track.

[0048] When a vehicle switches from another track to the first moving track, the running wheels need to enter the first moving track through the matching area of ​​the first moving track, that is, the matching area is also the entrance area for the vehicle to enter the first moving track. The first moving track can be provided with one matching area or multiple matching areas. In the embodiment shown in the figure, the matching area is the area corresponding to the running wheels of the vehicle. In the embodiment shown in the figure, the size of the matching area is slightly larger than the guide wheels of the running wheels of the vehicle. For example, Figure 6 As shown, the area within the elliptical circle of the first moving track is defined as the matching area. An area slightly larger or smaller than the elliptical circle may also be defined as the matching area.

[0049] The first movable track is configured as follows: when the traveling wheel moves along the tooth width direction of the rack 32 and cooperates with the matching area of ​​the first movable track, the gear 12 passes through the first guide bar 311 and the second guide bar 312 and engages with the rack 32. When the gear 12 engages with the rack 32, the guide wheel 13 is located between the first guide bar 311 and the second guide bar 312.

[0050] The vehicle enters the first moving track by moving the gear 12 and the guide wheel 13. First, by moving the gear 12 along the tooth width direction, the gear 12 first enters between the first guide bar 311 and the second guide bar 312, then passes through the first guide bar 311 and the second guide bar 312 and begins to mesh with the rack 32. Since the guide wheel 13 is located on the inner side of the vehicle relative to the gear 12, when the gear 12 has passed through or is about to pass through the first guide bar 311 and the second guide bar 312, the guide wheel 13 then also begins to enter between the first guide bar 311 and the second guide bar 312. Figure 5As shown, the distance b between the first guide bar 311, the second guide bar 312 and the guide wheel is slightly larger than the diameter of the guide wheel 13. In some embodiments, there is a clearance fit between the first guide bar 311, the second guide bar 312 and the guide wheel. Since the diameter of the guide wheel is larger than the diameter of the tooth top circle of the gear 12, the gear 12 can easily pass through the first guide bar 311 and the second guide bar 312. During the process of meshing between the gear 12 and the rack 32, the guide portion including the first guide bar 311 and the second guide bar 312 guides the guide wheel 13, so that the gear coaxial with the guide wheel 13 is guided to a position where it can correctly mesh with the rack 32. For example, in Figure 9 In the illustrated embodiment, when the vehicle stops and begins to enter the first moving track via the running wheels, the gear 12 is first extended outward along the axial direction of the gear 12. If the gear 12 is in an unsuitable position perpendicular to the axial direction of the gear 12, making it difficult to mesh with the rack 32, the guide wheel 13 is extended. The guide portion guides the guide wheel 13, which in turn propels the guide wheel 13, the gear 12, and the entire vehicle in a direction perpendicular to the axial direction of the gear 12 (i.e., the direction connecting the rear and front ends of the vehicle), thereby positioning the gear 12 in a position where it can properly mesh with the rack 32. Furthermore, because the guide wheel is positioned between the first guide bar 311 and the second guide bar 312 when the gear 12 is meshed with the rack 32, the forces acting on the guide wheel from the first guide bar 311 and the second guide bar 312 ensure that the gear 12 and the rack 32 remain securely engaged. When the gear 12 and the rack 32 are engaged and move relative to each other to cause the vehicle to travel, the first guide bar 311 and the second guide bar 312 guide the guide wheel 13 so that the vehicle can travel correctly and smoothly on the first moving track.

[0051] The track travel system of this embodiment comprises a guide portion having a first guide bar 311 and a second guide bar 312, and the coaxial arrangement of the vehicle's travel wheels with the gear 12 and guide wheel 13, with the guide wheel 13 positioned inside the gear 12 and having a diameter greater than the diameter of the addendum of the gear 12. This allows the gear 12 of the vehicle's travel wheels to easily pass through the guide portion and engage with the rack 32, thereby conveniently entering the travel track. After the gear 12 engages with the rack 32, the first guide bar 311, the second guide bar 312, and the guide wheel 13 cooperate to guide the vehicle's travel on the first travel track. Furthermore, the cooperation between the first guide bar 311, the second guide bar 312, and the guide wheel 13 ensures stable and reliable engagement between the gear 12 and the rack 32.

[0052] In some embodiments, as Figures 5 to 9As shown, the first guide bar 311 is provided with a first rib 3111 on the side away from the rack 32, which protrudes toward the second guide bar 312 and extends in the same direction as the rack 32. The second guide bar 312 is provided with a second rib 3121 on the side away from the rack 32, which protrudes toward the first guide bar 311 and extends in the same direction as the rack 32. The first rib 3111 and the second rib 3121 are respectively provided with two opening grooves 313 with opposite notches in the matching area. The opening groove 313 is used for the traveling wheel to pass through the gear 12 and the guide wheel 13 when entering the first moving track. The distance between the first rib 3111 and the second rib 3121 is less than the diameter of the guide wheel 13, and the distance between the groove bottoms of the opening groove 313 of the first rib 3111 and the opening groove 313 of the second rib 3121 is greater than the diameter of the guide wheel 13.

[0053] A first rib 3111 and a second rib 3121 are provided, and the distance between the first rib 3111 and the second rib 3121 is smaller than the distance between the guide wheels 13. When the traveling wheels travel on the first movable track, the first rib 3111 and the second rib 3121 can prevent the guide wheels 13 from moving inwardly of the vehicle, allowing the traveling wheels to travel stably on the first movable track. Two openings 313 are provided to enable the gear 12 and the guide wheels 13 to pass through the openings 313 to stably and reliably enter between the first guide bar 311 and the second guide bar 312.

[0054] In some embodiments, as Figures 5 to 9 As shown, the first guide bar 311 and the second guide bar 312 are respectively provided with notches 314 in the matching area on the sides away from the rack 32, and the notches 314 include a first notch of the first guide bar 311 and a second notch of the second guide bar 312, and the first notch and the second notch are opposite to each other. The first notch and the second notch form an entrance for the traveling wheel to enter the first moving track, and the distance between the bottom wall of the first notch and the bottom wall of the second notch is greater than the diameter of the guide wheel 13 and along the direction in which the traveling wheel enters the first moving track, the distance between the bottom wall of the first notch and the bottom wall of the second notch gradually decreases.

[0055] That is, a tapered opening is formed on the side of the first guide bar 311 and the second guide bar 312 away from the rack 32 to guide the gear 12 and the guide wheel 13 to enter between the first guide bar 311 and the second guide bar 312, so as to facilitate the travel wheel to enter the first moving track. Figure 6 and Figure 7 As shown, the notch and the open groove are connected.

[0056] In some embodiments, as Figure 5 、 Figure 7 、 Figure 8 and Figure 9As shown, the first guide bar 311 is provided with a third rib 3112 on a side close to the rack 32, protruding toward the second guide bar 312 and extending in the same direction as the rack 32. The second guide bar 312 is provided with a fourth rib 3212 on a side away from the rack 32, protruding toward the first guide bar 311 and extending in the same direction as the rack 32. The distance between the third rib 3112 and the fourth rib 3212 is less than the diameter of the guide wheel 13. The provision of the third rib 3112 and the fourth rib 3212 prevents the guide wheel 13 from moving outward from the vehicle when the first and second guide bars 311 and 312 guide the guide wheel 13, allowing the guide wheel 13 to stably cooperate with the first and second guide bars 311 and 312, making the vehicle's travel on the first movable track more stable and reliable.

[0057] In some embodiments, the first moving track is further provided with only one guide tooth 36 and a reset device 34 provided between the guide tooth 36 and the rack 32 in the mating area. The guide tooth 36 is provided on one side of the rack 32 along the tooth width direction and is movably provided relative to the rack 32. The mating area is configured as follows: when the traveling wheel starts to enter the first moving track, when the gear 12 moves axially along the traveling wheel and approaches the rack 32, the guide tooth 36 contacts the gear teeth of the gear 12 to guide the gear 12 to a circumferential position that can engage with the rack 32. After the guide tooth 36 is pressed by the gear 12 and approaches the rack 32, the reset device 34 resets the guide tooth 36 in a direction away from the rack 32.

[0058] Only one guide tooth 36 means that the first movable track has only one guide tooth 36 in the matching area, and only one guide tooth 36 movable relative to the rack 32 is arranged outside the rack 32, and no guide tooth 36 is arranged on the rack 32. Only one guide tooth 36 is arranged in the matching area, which can simplify the structure of the matching area and is beneficial to the processing and production of the matching area.

[0059] like Figure 10 and Figure 11 As shown, during the movement of the gear 12, when the circumferential position of the gear 12 cannot properly mesh with the rack 32, the gear teeth of the gear 12 will contact the guide teeth 36, and the gear teeth of the gear 12 will generate pressure on the guide teeth 36. Under the action of pressure, the guide teeth 36 will approach the rack 32, and the distance a between the guide teeth 36 and the rack 32 will decrease. At the same time, the guide teeth 36 will generate a reaction force on the gear teeth. Under the reaction force of the guide teeth 36, the gear 12 will rotate, thereby changing the circumferential position to a position where it can properly mesh with the rack 32. Figure 1 As shown, the guide teeth 36 are aligned with the teeth of the rack 32. After the gear 12 is properly engaged with the rack 32 and the gear 12 does not exert pressure on the guide teeth 36, the compressed guide teeth 36 will be away from the rack 32 under the action of the reset device and reset to the initial position.

[0060] The rail travel system of this embodiment provides only one guide tooth 36 in the mating area between the first movable rail and the traveling wheel. This guide tooth 36 is movably disposed relative to the rack 32. When the gear 12 of the traveling wheel moves along the width direction of the rack 32 and approaches the rack 32, the guide tooth 36 can effectively guide the gear 12 to a circumferential position where it meshes with the rack 32, allowing the gear 12 to mesh easily and accurately with the rack 32. This simple structure is convenient and effective, making it easy to manufacture.

[0061] In some embodiments, in the mating region, the first movable rail further includes a mounting member slidably connected to the rack 32, with guide teeth 36 disposed on the mounting member. The guide teeth 36 are slidably connected to the rack 32 via the mounting member, allowing the guide teeth 36 to move more smoothly when compressed.

[0062] In some embodiments, the reset device 34 includes an elastic member disposed between the rack 32 and the mounting member. The reset device 34 may include an elastic member such as a spring.

[0063] In some embodiments, as Figure 12 As shown, in the mating area, the rack 32 includes a blind hole 323 extending along the tooth width. The bottom surface and the opening of the blind hole 323 are located at opposite ends of the rack 32 along the tooth width of the rack 32, and the elastic member is disposed within the blind hole 323. The provision of the blind hole 323 can ensure more stable and reliable installation and function of the elastic member. The bottom surface and the opening of the blind hole 323 are located at opposite ends of the rack, which can increase the depth of the blind hole and improve the installation reliability of the elastic member.

[0064] In some embodiments, in the mating area, the rack 32 also includes a through hole 322 extending along the tooth width direction, the mounting part includes a sliding part 351 that is clearance-matched with the through hole 322 and a plate body 352 fixedly connected to the sliding part 351, and the guide tooth 36 is provided on the plate body 352.

[0065] In some embodiments, the slider 351 includes a pin 3511 that is loosely fitted into the through-hole 322. A ring plate 3512 is provided on the end of the pin 3511, located outside the through-hole 322 and away from the plate 352. The diameter of the ring plate 3512 is larger than the diameter of the through-hole 322. The provision of the ring plate allows for more accurate axial positioning of the pin 3511, limiting further movement of the plate away from the rack. Furthermore, the spring does not need to be fixedly connected to the bottom surface within the blind hole, facilitating its installation within the blind hole.

[0066] In some embodiments, in the mating region, the rack 32 further includes a groove 321 provided at one end along the tooth width, and the plate 352 is positioned within the groove 321. The provision of the groove 321 prevents the plate 352 from protruding further from the rack in a direction away from the rack, making the structure of the first movable track more compact and reducing interference with the gear 12.

[0067] In some embodiments, as shown in the figures, the guide tooth 36 is provided with a first pointed portion along the tooth width of the rack 32, with the apex of the first pointed portion facing away from the rack 32. In some embodiments, the first pointed portion includes two inclined surfaces located on either side of the apex, which are inclined toward the rack 32. In the embodiment shown in the figures, the apex 363 of the first pointed portion is linear, and the two inclined surfaces include a first inclined surface 361 and a second inclined surface 362 located on either side of the apex 363 of the first pointed portion. The inclined surfaces are inclined toward the rack 32, that is, the inclined surfaces gradually approach the rack 32 as they extend away from the apex. This arrangement can more effectively guide the gear 12.

[0068] In some embodiments, the tip is inclined toward the rack 32. As the tip 363 of the first pointed portion extends away from the rack 32 along the tooth height of the rack 32, it gradually approaches the rack 32. This arrangement can more effectively guide the gear 12.

[0069] In some embodiments, the gear teeth of gear 12 are provided with a second pointed portion on the end surface facing away from the vehicle. When gear 12 moves axially along the travel wheel and approaches rack 32, the tip of the second pointed portion faces rack 32. As gear 12 moves axially along the travel wheel and approaches rack 32, the tip of the second pointed portion faces rack 32. As shown in the figure, the tip 121 of the second pointed portion is linear and faces rack 32. This arrangement enables guide teeth 36 to more effectively guide gear 12.

[0070] In some embodiments, the track travel system is configured so that when the traveling wheel cooperates with the mating area and the gear 12 moves axially along the traveling wheel close to the rack 32, the axis of the gear 12 and the center line of the guide tooth 36 are at different positions along the extension direction of the rack 32.

[0071] That is, when the vehicle in the track travel system enters the first moving track, the axis of the gear 12 and the axis of the guide tooth are misaligned at the entry point, as shown by the dotted line x and dotted line y in the figure. This setting helps to avoid the phenomenon that the tip of the second pointed portion of the gear 12 and the tip of the first pointed portion of the guide tooth are exactly aligned. Even if the tip of the tip of the second pointed portion and the tip of the first pointed portion of the guide tooth come into contact, the tip of the tip of the second pointed portion and the tip of the first pointed portion of the guide tooth will intersect. As the guide tooth is compressed close to the rack, the tip of the tip of the second pointed portion and the tip of the first pointed portion of the guide tooth will gradually separate, so that the gear can be correctly guided and the meshing of the gear and the rack can be more reliable and effective.

[0072] In some embodiments, the track travel system further includes a second movable track 2 for vehicle travel, and the cooperation area is used to cooperate with the travel wheels when the vehicle changes track from the second movable track 2 to the first movable track 3.

[0073] In some embodiments, the first movable track 3 is a vertical track, the second movable track 2 is a horizontal track, and the first movable track 3 includes a U-shaped column 33 surrounding the outside of the guide part and the rack 32 and extending in the vertical direction. The first guide bar 311 and the second guide bar 312 are respectively arranged on the two opposite inner walls of the U-shaped column 33.

[0074] In some embodiments, the first moving rail 3 is a vertical rail, and the rail travel system includes multiple second moving rails 2 that intersect with the first moving rail 3 and are distributed in the vertical direction. The second moving rail 2 is a horizontal rail. The second moving rail 2 includes a first sub-horizontal rail 21 and a second sub-horizontal rail 22 that extend in the same direction, are arranged at intervals, and both intersect with the first moving rail 3. The distance between the first sub-horizontal rail 21 and the second sub-horizontal rail 22 is less than the distance between the first guide bar 311 and the second guide bar 312.

[0075] In some embodiments, as Figure 3 and Figure 4 As shown, the vehicle includes a connecting plate 17, a support shaft 16 and a support wheel 14. The support wheel is mounted on one end of the support shaft 16. The running wheel also includes a running wheel 11 surrounding the outside of the guide wheel 13. The gear 12 and the guide wheel 13 are coaxially mounted on the spline shaft 15. The other ends of the support shaft 16 and the spline shaft 15 are both mounted on the connecting plate 17. When the vehicle is running on the second moving track, the connecting plate 17 is in Figure 3In the position shown, the running wheels travel on the second moving track via the running wheels 11. When changing tracks from the second moving track to the first moving track, the vehicle first moves to a position corresponding to the mating area of ​​the first moving track, and then drives the connecting plate to move toward the outside of the vehicle. The movement of the connecting plate 17 drives the support shaft 16 and the spline shaft 15 to extend outward, while the running wheels 11 do not extend. The spline shaft 15 drives the gear 12 and the guide wheel 13 to extend outward to mate with the mating area of ​​the first moving track. The support wheel 14 also extends deep between the first guide bar and the second guide bar and is guided by the guide portion.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solutions of the present invention. They should all be included in the scope of the technical solutions claimed for protection by the present invention.

Claims

1. A track travel system, characterized in that: include: A vehicle (1) comprises a running wheel and a supporting wheel, wherein the running wheel comprises a rotatable gear (12), a guide wheel (13) coaxial with the gear (12) and located on the inner side of the vehicle (1) relative to the gear (12), and the diameter of the guide wheel (13) is larger than the diameter of the tooth top circle of the gear (12); A first movable track (3) is used for the vehicle (1) to travel, comprising a rack (32) and a guide portion located on one side of the rack (32) along the tooth width direction, wherein the guide portion is used to guide the guide wheel (13) when the vehicle (1) travels on the first movable track (3), and the guide portion comprises a first guide bar (311) and a second guide bar (312) which are arranged opposite to each other and extend in the same direction as the rack (32), wherein the distance between the first guide bar (311) and the second guide bar (312) is greater than the diameter of the guide wheel (13), and the first movable track (3) having a matching area for matching with the traveling wheel when the traveling wheel starts to enter the first moving track (3), and the first moving track (3) is configured as follows: when the traveling wheel moves along the tooth width direction of the rack (32) and matches with the matching area of ​​the first moving track (3), the gear (12) passes through the first guide bar (311) and the second guide bar (312) and then engages with the rack (32), and when the gear (12) is engaged with the rack (32), the guide wheel (13) is located between the first guide bar (311) and the second guide bar (312). The support wheel extends between the first guide bar and the second guide bar; the first guide bar (311) is provided with a first rib (3111) on a side away from the rack (32), which protrudes toward the second guide bar (312) and extends in the same direction as the rack (32); the second guide bar (312) is provided with a second rib (3121) on a side away from the rack (32), which protrudes toward the first guide bar (311) and extends in the same direction as the rack (32); the first rib (311 1) and the second rib (3121) are respectively provided with two opening grooves (313) with opposite notches in the matching area, the opening grooves (313) being used for the traveling wheel to pass through the gear (12) and the guide wheel (13) when entering the first moving track (3), the distance between the first rib (3111) and the second rib (3121) being smaller than the diameter of the guide wheel (13), and the distance between the groove bottoms of the opening groove (313) of the first rib (3111) and the opening groove (313) of the second rib (3121) being larger than the diameter of the guide wheel (13).

2. The track travel system according to claim 1, characterized in that: The first guide bar (311) and the second guide bar (312) are provided with a first notch and a second notch opposite to each other in the matching area on the sides away from the rack (32), and the first notch and the second notch form an entrance for the traveling wheel to enter the first movable track (3). The distance between the bottom wall of the first notch and the bottom wall of the second notch is greater than the diameter of the guide wheel (13), and the distance between the bottom wall of the first notch and the bottom wall of the second notch gradually decreases along the direction in which the traveling wheel enters the first movable track (3).

3. The track travel system according to claim 1, characterized in that: The first guide bar (311) is provided with a third rib (3112) on a side close to the rack (32), which protrudes toward the second guide bar (312) and extends in the same direction as the rack (32); the second guide bar (312) is provided with a fourth rib (3212) on a side away from the rack (32), which protrudes toward the first guide bar (311) and extends in the same direction as the rack (32); the distance between the third rib (3112) and the fourth rib (3212) is smaller than the diameter of the guide wheel (13).

4. The track travel system according to any one of claims 1 to 3, characterized in that: The first movable track (3) is further provided with only one guide tooth (36) and a reset device (34) provided between the guide tooth (36) and the rack (32) in the matching area. The guide tooth (36) is provided on one side of the rack (32) along the tooth width direction and is movably provided relative to the rack (32). The matching area is configured as follows: when the traveling wheel enters the first movable track (3) and the gear (12) moves axially along the traveling wheel to approach the rack (32), the guide tooth (36) contacts the gear teeth of the gear (12) to guide the gear (12) to a circumferential position capable of engaging with the rack (32). After the guide tooth (36) is pressed by the gear (12) to approach the rack (32), the reset device (34) resets the guide tooth (36) in a direction away from the rack (32).

5. The track travel system according to claim 4, characterized in that: In the matching area, the first movable track (3) further comprises a mounting member slidably connected to the rack (32), and the guide tooth (36) is provided on the mounting member.

6. The track travel system according to claim 5, characterized in that: The reset device (34) comprises an elastic member arranged between the rack (32) and the mounting member.

7. The track travel system according to claim 6, characterized in that: In the mating area, the rack (32) includes a blind hole (323) extending along the tooth width direction, the bottom surface of the blind hole (323) and the opening of the blind hole (323) are respectively located at opposite ends of the rack (32) along the tooth width direction of the rack (32), and the elastic member is arranged in the blind hole (323).

8. The track travel system according to claim 5, characterized in that: In the mating area, the rack (32) further includes a through hole (322) extending along the tooth width direction, the mounting member includes a sliding member (351) clearance-matched with the through hole (322) and a plate body (352) fixedly connected to the sliding member (351), and the guide tooth (36) is provided on the plate body (352).

9. The track travel system according to claim 8, characterized in that: The sliding member (351) includes a pin shaft (3511) that is clearance-matched with the through hole (322). The pin shaft (3511) is located outside the through hole (322) and is provided with a ring plate (3512) on the end thereof that is away from the plate body (352). The diameter of the ring plate (3512) is larger than the diameter of the through hole (322).

10. The track travel system according to claim 8, characterized in that: In the matching area, the rack (32) further includes a groove (321) provided at one end along the tooth width direction, and the plate body (352) is located in the groove (321).

11. The track travel system according to claim 4, characterized in that: Along the tooth width direction of the rack (32), the guide tooth (36) is provided with a first pointed portion, and the tip of the first pointed portion faces in a direction away from the rack (32).

12. The track travel system according to claim 11, characterized in that: The first pointed portion comprises two inclined surfaces located on both sides of the tip, and the inclined surfaces are inclined in a direction close to the rack (32).

13. The track travel system according to claim 11, characterized in that: The pointed top is inclined in a direction close to the rack (32).

14. The track travel system according to claim 11, characterized in that: The gear teeth of the gear (12) are provided with a second pointed portion on the end face in a direction away from the vehicle (1); when the gear (12) moves axially along the traveling wheel and approaches the rack (32), the tip of the second pointed portion faces the rack (32).

15. The track travel system according to claim 11, characterized in that: The track travel system is configured such that, when the traveling wheel cooperates with the cooperation area and the gear (12) moves axially along the traveling wheel close to the rack (32), the axis of the gear (12) and the center line of the guide tooth (36) are at different positions along the extension direction of the rack (32).

16. The track travel system according to any one of claims 1 to 3, characterized in that: The track travel system further comprises a second movable track (2) for the vehicle (1) to travel, and the cooperation area is used to cooperate with the travel wheel when the vehicle (1) changes track from the second movable track (2) to the first movable track (3).

17. The track travel system according to claim 16, characterized in that: The first movable track (3) is a vertical track, and the second movable track (2) is a horizontal track. The first movable track (3) includes a U-shaped column (33) surrounding the guide portion and the rack (32) and extending in the vertical direction. The first guide bar (311) and the second guide bar (312) are respectively arranged on two opposite inner walls of the U-shaped column (33).

18. The track travel system according to claim 16, wherein: The first moving track (3) is a vertical track, and the track travel system includes a plurality of second moving tracks (2) intersecting with the first moving track (3) and distributed in a vertical direction. The second moving track (2) is a horizontal track, and the second moving track (2) includes a first sub-horizontal track (21) and a second sub-horizontal track (22) extending in the same direction, arranged at intervals, and both intersecting with the first moving track (3). The distance between the first sub-horizontal track (21) and the second sub-horizontal track (22) is smaller than the distance between the first guide bar (311) and the second guide bar (312).

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