Trolley system, travel track and trolley
By installing anti-fall wheels and limit strips on the transport vehicle, the problems of complex and costly travel track structure in the OHT system are solved, achieving the effects of simplified structure, reduced cost and improved safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU XINSHINUO SEMICON EQUIP CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-06-12
AI Technical Summary
In existing OHT systems, the track structure is complex and requires multiple power sources, which increases equipment and operating costs.
A first and second anti-fall wheel are installed on the transport vehicle, which works in conjunction with the limit strips on the cross track to prevent the transport vehicle from falling when passing through the cross area, thus eliminating the need for an auxiliary track power source.
It simplifies the structure, reduces equipment and operating costs, improves operational safety and reliability, and reduces wear and debris contamination.
Smart Images
Figure CN224349694U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material handling systems, and in particular to material handling vehicle systems, travel tracks, and material handling vehicles. Background Technology
[0002] The track is the carrier used by the transport vehicle in the OHT system to move.
[0003] Patent document US20230192158A1 discloses a travel track for an OHT system.
[0004] In this structure, auxiliary tracks that can be raised, lowered, and rotated are used to connect with guide rails in the X-axis and Y-axis directions, allowing the transport vehicle to pass through the break in the middle of the tracks.
[0005] This results in a more complex driving track and requires multiple power sources, significantly increasing equipment and operating costs. Utility Model Content
[0006] The purpose of this utility model is to solve the above-mentioned problems existing in the prior art and to provide a transport vehicle system, a travel track and a transport vehicle.
[0007] The objective of this utility model is achieved through the following technical solution:
[0008] A transport vehicle system includes a cross track and a transport vehicle. The moving component of the transport vehicle is provided with a first anti-fall wheel that is higher than and closer to the front moving wheel and a second anti-fall wheel that is higher than and closer to the rear moving wheel. Above the cross track, there is also a pair of first limiting bars extending along the X-axis and a pair of second limiting bars extending along the Y-axis. The gap between the first limiting bars is distributed on opposite sides of the intersection area of the cross track, and the gap between the second limiting bars is distributed on the other two sides of the intersection area.
[0009] When the front moving wheel of the transport vehicle moving along the X-axis passes through the intersection area, the second anti-fall wheel of the transport vehicle rolls and affixes to the bottom of the first limiting strip on one side; when the rear moving wheel of the transport vehicle passes through the intersection area, the first anti-fall wheel rolls and affixes to the bottom of the first limiting strip on the other side.
[0010] When the front moving wheel of the transport vehicle moving along the Y-axis passes through the intersection area, the second anti-fall wheel of the transport vehicle rolls and affixes to the bottom of the second limiting strip on one side; when the rear moving wheel of the transport vehicle passes through the intersection area, the first anti-fall wheel rolls and affixes to the bottom of the second limiting strip on the other side.
[0011] Preferably, in the transport vehicle system, the bottom corners of both ends of the first and second limiting bars are rounded.
[0012] Preferably, in the transport vehicle system, at least one detection sensor for detecting the passage of the transport vehicle is provided at each of the X-axis and Y-axis tracks on each side of the cross track.
[0013] Preferably, in the transport vehicle system, two detection sensors are provided on each of the X-axis and Y-axis tracks, distributed along their extension directions.
[0014] Preferably, in the transport vehicle system, the first anti-fall wheel is located in front of the front moving wheel, and the second anti-fall wheel is located behind the rear moving wheel.
[0015] Preferably, in the transport vehicle system, the first and second anti-fall wheels are wear-resistant plastic wheels.
[0016] The travel track includes a cross track, which includes a vertical X-axis track and a Y-axis track. Above the cross track are a pair of first limiting strips extending along the X-axis and a pair of second limiting strips extending along the Y-axis. The gaps between the first limiting strips are distributed on opposite sides of the intersection area of the cross track, and the gaps between the second limiting strips are distributed on the other two sides of the intersection area.
[0017] A transport vehicle includes a moving assembly comprising a pair of front moving wheels and a pair of rear moving wheels. The moving assembly is provided with a first anti-fall wheel that is higher than and closer to the front moving wheels and a second anti-fall wheel that is higher than and closer to the rear moving wheels. The axes of the first anti-fall wheel and the second anti-fall wheel are parallel to the front moving wheels and the rear moving wheels.
[0018] Preferably, the first anti-fall wheel is located in front of the front moving wheel, and the second anti-fall wheel is located behind the rear moving wheel.
[0019] The advantages of this utility model's technical solution are mainly reflected in:
[0020] The present invention provides a solution by setting a first anti-fall wheel and a second anti-fall wheel on the transport vehicle, which cooperate with the first and second limit bars above the cross rails. This eliminates the need for an auxiliary rail to allow the transport vehicle to pass through the break, and eliminates the need for a power source to drive the auxiliary rails. This effectively simplifies the structure and reduces equipment and operating costs.
[0021] The bottom corners of the first and second limiting strips of this utility model are rounded, which allows the first and second anti-fall wheels to move more smoothly below the first and second limiting strips, thereby better protecting the first and second anti-fall wheels.
[0022] This invention features two detection sensors on each of the X-axis and Y-axis tracks, enabling safer control of the transport vehicle's operation by strategically positioning the sensors near the intersection areas.
[0023] The first anti-fall wheel of this utility model is located on the front side of the front moving wheel, and the second anti-fall wheel is located on the rear side of the rear moving wheel. This can effectively ensure that the transport vehicle is limited and will not fall. At the same time, the use of wear-resistant plastic wheels can effectively reduce the wear of the first and second anti-fall wheels, avoid wear affecting reliable limiting, and reduce the contamination of the clean room by wear debris. Attached Figure Description
[0024] Figure 1 This is a three-dimensional view of the structure at the intersection of the transport vehicle system of this utility model;
[0025] Figure 2 This is a cross-sectional view of the cross track of the transport vehicle system of this utility model;
[0026] Figure 3 This is a force analysis diagram of the front moving wheel located in the intersection area and the second anti-fall wheel abutting against the first or second limiting strip on one side in this utility model.
[0027] Figure 4 This utility model shows the force analysis diagram where the rear moving wheel is located in the intersection area and the first anti-fall wheel abuts against the first or second limiting strip on the other side. Detailed Implementation
[0028] The purpose, advantages, and features of this utility model will be illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of applying the technical solutions of this utility model, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this utility model.
[0029] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0030] Example 1
[0031] The following description, in conjunction with the accompanying drawings, illustrates the transport vehicle system disclosed in this utility model, which includes a suspended travel track, as shown in the attached drawings. Figure 1 As shown, the travel track includes a cross track 100. The structure of the cross track 100 is the same as that of the prior art cited in the background art. It includes an X-direction track 110 and a Y-direction track 120 distributed in a cross shape. The X-direction track extends horizontally along the X-axis direction, and the Y-direction track extends horizontally along the Y-axis direction. The intersection area 130 at the center of the cross track 100 is an opening.
[0032] As attached Figure 1 Appendix Figure 2 As shown, a transport vehicle 200 runs on the travel track. Like existing transport vehicles, the transport vehicle 200 includes a moving assembly 210 located on its upper part. The moving assembly 210 includes a pair of coaxial front moving wheels 211 and a pair of coaxial rear moving wheels 212.
[0033] In order to enable the front moving wheel 211 and the rear moving wheel 212 to pass smoothly through the intersection area of the cross track, the moving assembly 210 is provided with a first anti-fall wheel 213 that is higher than and closer to the front moving wheel 211 and a second anti-fall wheel 214 that is higher than and closer to the rear moving wheel 212.
[0034] Preferably, the front moving wheel 211 is mounted on the top of the moving assembly 210 via a first bracket 215, and the first anti-fall wheel 213 is located in front of the front moving wheel 211. A certain distance is maintained between the first anti-fall wheel 213 and the front moving wheel 211; this distance can be designed as needed and is not limited here. Correspondingly, the rear moving wheel 212 is mounted on the top of the moving assembly 210 via a second bracket 216, and the second anti-fall wheel 214 is located behind the rear moving wheel 212. A certain distance is maintained between the second anti-fall wheel 214 and the rear moving wheel 212; this distance can be designed as needed and is not limited here.
[0035] The first anti-fall wheel 213 and the second anti-fall wheel 214 are positioned opposite each other in the direction of movement of the transport vehicle. At the same time, the positions of the first anti-fall wheel 213 and the second anti-fall wheel 214 in the width direction of the transport vehicle (the extension direction of the axis of the front moving wheel 211) can be designed as needed. Preferably, the first anti-fall wheel 213 and the second anti-fall wheel 214 are located in the middle position in the width direction of the transport vehicle, which helps the transport vehicle to pass through the intersection area more stably.
[0036] Furthermore, in order to extend the service life of the first anti-fall wheel 213 and the second anti-fall wheel 214 and reduce the pollution of the cleanroom environment by wear debris, the first anti-fall wheel 213 and the second anti-fall wheel 214 are made of wear-resistant plastic wheels, for example, the first anti-fall wheel 213 and the second anti-fall wheel 214 are nylon wheels or Teflon wheels.
[0037] As attached Figure 1 Appendix Figure 2 As shown, a pair of first limiting strips 300 extending along the X-axis and a pair of second limiting strips 400 extending along the Y-axis are also provided above the cross track. The first limiting strips 300 are spaced apart on opposite sides of the intersection area of the cross track, and the second limiting strips 400 are spaced apart on the other two sides of the intersection area. The first limiting strips 300 and the second limiting strips 400 are disposed at the bottom of a carrier plate 500, which is preferably a cross plate located directly above the cross track. The first limiting strips 300 and the second limiting strips 400 are disposed at the middle position in the width direction of each support plate 510 of the cross plate. Of course, this is not mandatory, as long as the positions of the first limiting strips 300 and the second limiting strips 400 match the first anti-fall wheel 213 and the second anti-fall wheel 214. At the same time, the lengths of the first limiting strips 300 and the second limiting strips 400 and their distances from the intersection area can be designed as needed and are not limited here. Furthermore, to prevent the first anti-fall wheel 213 and the second anti-fall wheel 214 from colliding with the ends of the first limit bar 300 and the second limit bar 400 when they move, the bottom corners of both ends of the first limit bar 300 and the second limit bar 400 are rounded.
[0038] Therefore, when the front moving wheel 211 of the transport vehicle moving along the X-axis passes through the intersection area, the second anti-fall wheel 214 of the transport vehicle rolls and abuts against the bottom of the first limiting strip 300 on one side; when the rear moving wheel 212 of the transport vehicle passes through the intersection area, the first anti-fall wheel 213 rolls and abuts against the bottom of the first limiting strip 300 on the other side, as shown in the attached figure. Figure 2 As shown.
[0039] When the front moving wheel 211 of the transport vehicle moving along the Y-axis passes through the intersection area, the second anti-fall wheel 214 of the transport vehicle rolls and affixes to the bottom of the second limiting strip 400 on one side; when the rear moving wheel 212 of the transport vehicle passes through the intersection area, the first anti-fall wheel 213 rolls and affixes to the bottom of the second limiting strip 400 on the other side.
[0040] Therefore, as attached Figure 3As shown, when the front moving wheel 211 is located in the intersection area, it tends to fall downwards due to gravity G1. Meanwhile, the rear moving wheel 212 is supported upwards by the X-axis track 110 or the Y-axis track 120. At the same time, the second anti-fall wheel 214 is subjected to downward pressure F2 from the first limiting strip 300 or the second limiting strip 400. As a result, the second anti-fall wheel 214 cannot tilt upwards, thereby restricting the front moving wheel 211 from falling into the intersection area. Therefore, the front moving wheel 211 of the transport vehicle can pass through the intersection area smoothly.
[0041] As attached Figure 4 As shown, when the rear moving wheel 212 is located in the intersection area, it tends to fall downwards due to gravity G2, while the front moving wheel 211 is supported upwards by the X-direction track 110 or the Y-direction track 120 by an upward force F3. At the same time, the first anti-fall wheel 213 is subjected to downward pressure F4 from the first limiting strip 300 or the second limiting strip 400, so the first anti-fall wheel 213 cannot tilt upwards, thereby restricting the rear moving wheel 212 from falling into the intersection area. Therefore, the rear moving wheel 212 of the transport vehicle can pass through the intersection area smoothly.
[0042] Furthermore, in order to effectively control the transport vehicle as it passes through the cross tracks, as shown in the attached... Figure 1 Appendix Figure 2 As shown, at least one detection sensor 600 for detecting the passage of a transport vehicle is respectively provided at the X-axis track 110 and Y-axis track 120 on each side of the cross track. The detection sensor 600 can be a through-beam sensor, proximity sensor, etc., and is not limited here. During operation, when the detection sensor 600 at one side of the X-axis track 110 or Y-axis track 120 is triggered by the front moving wheel 211 of the transport vehicle, if no other transport vehicle is passing through the cross track and no other transport vehicle is waiting to pass through the cross track, the control system allows the transport vehicle to pass through the cross track. When the transport vehicle moves to the X-axis track 110 or Y-axis track 120 on the other side and its rear moving wheel 212 triggers the detection sensor 600 on the X-axis track 110 or Y-axis track 120 on the other side, the control system determines that the transport vehicle has passed through the cross track. Furthermore, during the process of the transport vehicle passing through the cross track, the control system does not allow other transport vehicles to pass through the cross track. That is, if another transport vehicle triggers a detection sensor 600, the transport vehicle will stop and wait until the previous transport vehicle passes through the cross track before sending a passage instruction to the stopped and waiting transport vehicle.
[0043] Preferably, two detection sensors 600 are provided on each of the X-axis track 110 and Y-axis track 120 along their extending directions. The spacing between the two detection sensors can be designed as needed and is not limited here. When the front moving wheel 211 of the transport vehicle triggers the inner detection sensor 600, the transport vehicle can slow down to allow it to pass through the intersection area more stably.
[0044] This utility model has many other embodiments. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of this utility model.
Claims
1. A transport vehicle system, comprising cross rails and transport vehicles, characterized in that: The moving component of the transport vehicle is provided with a first anti-fall wheel that is higher than and closer to the front moving wheel and a second anti-fall wheel that is higher than and closer to the rear moving wheel. Above the cross track, there is also a pair of first limiting strips extending along the X-axis and a pair of second limiting strips extending along the Y-axis. The gap between the first limiting strips is distributed on opposite sides of the intersection area of the cross track, and the gap between the second limiting strips is distributed on the other side of the intersection area. When the front moving wheel of the transport vehicle moving along the X-axis passes through the intersection area, the second anti-fall wheel of the transport vehicle rolls and affixes to the bottom of the first limiting strip on one side; when the rear moving wheel of the transport vehicle passes through the intersection area, the first anti-fall wheel rolls and affixes to the bottom of the first limiting strip on the other side. When the front moving wheel of the transport vehicle moving along the Y-axis passes through the intersection area, the second anti-fall wheel of the transport vehicle rolls and affixes to the bottom of the second limiting strip on one side; when the rear moving wheel of the transport vehicle passes through the intersection area, the first anti-fall wheel rolls and affixes to the bottom of the second limiting strip on the other side.
2. The transport vehicle system according to claim 1, characterized in that: The bottom corners of both ends of the first and second limiting bars are rounded.
3. The transport vehicle system according to claim 1, characterized in that: At least one detection sensor is installed on each side of the X-axis and Y-axis tracks of the cross track to detect the passage of the transport vehicle.
4. The transport vehicle system according to claim 3, characterized in that: Two detection sensors are provided on each of the X-axis and Y-axis tracks, distributed along their extension directions.
5. The transport vehicle system according to claim 1, characterized in that: The first anti-fall wheel is located in front of the front moving wheel, and the second anti-fall wheel is located behind the rear moving wheel.
6. The transport vehicle system according to any one of claims 1-5, characterized in that: The first and second anti-fall wheels are wear-resistant plastic wheels.
7. A travel track, including intersecting tracks, said intersecting tracks comprising a perpendicular X-axis track and a Y-axis track, characterized in that: Above the intersecting tracks are a pair of first limiting strips extending along the X-axis and a pair of second limiting strips extending along the Y-axis. The gaps between the first limiting strips are distributed on opposite sides of the intersection area of the intersecting tracks, and the gaps between the second limiting strips are distributed on the other two sides of the intersection area.
8. A transport vehicle, comprising a moving assembly, said moving assembly including a pair of front moving wheels and a pair of rear moving wheels, characterized in that: The moving component is provided with a first anti-fall wheel that is higher than and closer to the front moving wheel and a second anti-fall wheel that is higher than and closer to the rear moving wheel. The axes of the first anti-fall wheel and the second anti-fall wheel are parallel to the front moving wheel and the rear moving wheel.
9. The transport vehicle according to claim 8, characterized in that: The first anti-fall wheel is located in front of the front moving wheel, and the second anti-fall wheel is located behind the rear moving wheel.