Track device, overhead crane device and overhead crane system of overhead crane transportation system

Abstract

This patent relates to the field of overhead cranes, and in particular to a track device, an overhead crane device and an overhead crane system for an overhead crane transportation system. It includes: two tracks arranged at intervals, for hanging the overhead crane device, and the tracks have a curved portion. A guide bar is arranged between the curved portions of the two tracks. The guide bar includes: a guide bar body, for supporting the diverging wheel of the overhead crane device, so that the diverging wheel is maintained at a preset offset position and has a first offset, so as to keep one side of the overhead crane device in a lifted state. A first transition bar, including: a first transition section, for gradually increasing the diverging wheel offset until the first offset is reached, so as to guide the diverging wheel to the guide bar body. A first plane section, the two ends of the first plane section are respectively connected to the first transition section and the guide bar body. The guide bar can lift one side of the overhead crane device when the overhead crane device is turning, so as to rely on the running wheels on one side to turn, thereby avoiding shaking caused by different walking distances on both sides of the overhead crane device.

Description

Technical Field

[0001] This patent relates to the field of rail vehicles, and in particular to a track device, a crane device and a crane system of an overhead crane transportation system. Background Art

[0002] In the process of using AMHS (Automatic Material Handling System), the OHT trolley is the most critical part. The OHT trolley will be responsible for the handling work in the system. In addition, the materials carried by the OHT trolley are relatively fragile. If a large vibration occurs during the movement, the materials will be damaged. The decisive factor that determines whether the OHT trolley can run smoothly is the track that carries the trolley. The quality of the track will directly affect the key indicators of the OHT trolley, such as positioning, running accuracy, speed, and vibration value.

[0003] In addition, when the OHT trolley is in operation, the running wheels will move along the track. However, when it is necessary to turn, the running wheels on both sides of the trolley have the same rotation speed, and the lengths of the tracks on both sides of the curve are different due to the inner and outer circles. At this time, the running wheels on both sides of the trolley have the same rotation speed, but the track distances traveled by the running wheels on both sides are different. This will cause the two sides of the OHT trolley to move forward out of sync, causing the trolley to shake and damage the materials carried by the OHT trolley. Summary of the invention

[0004] In order to solve or at least partially solve the above technical problems, this patent provides a track device, a crane device and a crane system of an overhead crane transportation system.

[0005] The patent provides a track device of an overhead crane transportation system, comprising: two tracks arranged at intervals, and a guide bar. The two tracks arranged at intervals are used to hang the overhead crane device, and the tracks have a curved portion. The guide bar is arranged between the curved portions of the two tracks. The guide bar comprises: a guide bar body and a first transition bar. The guide bar body is used to support the divergent wheel of the overhead crane device, so that the divergent wheel is maintained at a preset offset position and has a first offset, so as to keep one side of the overhead crane device in a lifted state. The first transition bar comprises: a first transition section and a first plane section. The first transition section is used to gradually increase the offset of the divergent wheel until the first offset is reached, so as to guide the divergent wheel to the guide bar body. The first plane section, the two ends of the first plane section are respectively connected to the first transition section and the guide bar body.

[0006] Preferably, in each cross section perpendicular to the advancing direction of the overhead travelling crane, the distance between the cross section where the rotation center of the guide wheel is located and the rotation center of the divergent wheel is less than or equal to the length of the first plane segment in the length direction of the guide bar body.

[0007] Preferably, the track device further comprises: an anti-collision guide block, the anti-collision guide block is connected to the first transition section, and the end of the anti-collision guide block away from the first transition section is an anti-collision end portion. There is an angle between the anti-collision end portion and the connecting line of the first plane section and the first transition section and the advancing direction of the overhead travelling device, and the angle is 20°-45°. The thickness of the anti-collision guide block increases first and then decreases from the anti-collision end portion.

[0008] Preferably, the curved portion includes at least two non-concentric curved portions, and the guide strip body includes: a first arc segment and a second arc segment. The first arc segment corresponds to and is concentric with the first curved portion of the curved portion. The second arc segment corresponds to and is concentric with the second curved portion of the curved portion.

[0009] Preferably, the bending directions of two adjacent bends of the bend portion are opposite, and the guide strip body further comprises: a straight transition section, with two ends respectively connected to the first arc section and the second arc section.

[0010] Preferably, the length of the straight transition section is less than or equal to the difference between the distance between the rotation centers of the two guide wheels and the distance between the rotation centers of the two divergent wheels on the same side of the overhead travelling device.

[0011] Preferably, the guide bar further includes: a second transition bar. The second transition bar includes: a second transition section and a second plane section. The second transition section is used to gradually reduce the divergent wheel offset from the first offset to 0, so as to guide the divergent wheel from the guide bar body to the return position. The second plane section, the two ends of the second plane section are respectively connected to the second transition section and the guide bar body. In each cross section perpendicular to the forward direction of the overhead crane device, the distance between the cross section where the rotation center of the guide wheel is located and the rotation center of the divergent wheel is less than or equal to the length of the second plane section in the length direction of the guide bar body, and the length of the first plane section is greater than the length of the second plane section.

[0012] A crane device is applicable to the track device of the above-mentioned crane transportation system, and the crane device comprises: a crane body, at least two sets of running wheels and diverging wheels. The at least two sets of running wheels are symmetrically arranged on the crane body, and the running wheels roll along the track to drive the crane body to move on the track. The rotation axis of the diverging wheels intersects with the rotation axis of the running wheels. When passing through the curved section of the track, the diverging wheels are gradually offset relative to the original position and reach a first offset amount under the support of the first transition section of the first transition strip, so as to lift one side of the crane device; the diverging wheels are also used to contact the guide strip body after passing through the first plane section, so as to keep one side of the crane device in a lifted state.

[0013] Preferably, the overhead crane device also includes at least two groups of guide wheels, which are symmetrically arranged on the overhead crane body. When entering the curve portion, the guide wheels abut against two side walls opposite to the two tracks, and roll along the side walls of the abutted tracks to guide the movement of the overhead crane body.

[0014] A crane system comprises the track device of the crane transportation system and the crane device arranged on the track device.

[0015] Compared with the prior art, the guide strips of the track device of the overhead crane transportation system of the patent can smoothly lift the overhead crane device at the bend, and achieve a smooth transition during the lifting process, avoiding the shaking of the overhead crane device body caused by the sudden lifting of one side when the overhead crane device passes the bend. The problem of the overhead crane device shaking when passing the bend and the uneven travel of the two sides when passing the bend during transportation is solved, and the safety of the wafers carried by the overhead crane device is protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation of this patent, the following is a brief introduction to the relevant drawings. It can be understood that the drawings described below are only used to illustrate some implementations of this patent, and ordinary technicians in this field can also obtain many other technical features and connection relationships not mentioned in this article based on these drawings.

[0017] Figure 1 It is a schematic diagram of a track device of an overhead travelling vehicle transport system according to an embodiment of the present patent;

[0018] Figure 2 It is a simplified schematic diagram of a track device of an overhead travelling vehicle transport system according to an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the entrance of a curve of a track device of an overhead crane transportation system in an embodiment of the present patent;

[0020] Figure 4 This is a schematic diagram of a curved exit of a track device of an overhead crane transportation system in an embodiment of the present patent;

[0021] Figure 5 It is a schematic diagram of a guide strip of an embodiment of the present patent;

[0022] Figure 6 This is a schematic diagram of the structure of the top of a crane device in an implementation mode of the present patent;

[0023] Figure 7 This is a schematic structural diagram of the side of a crane device in an embodiment of the present patent;

[0024] Figure 8This is a schematic diagram of a structure in which one side of a crane device is lifted when turning in an implementation mode of the present patent;

[0025] Fig. 9 yes Figure 8 Schematic diagram of the enlarged raised part of the traveling wheels of the overhead crane assembly.

[0026] Description of reference numerals:

[0027] 1. Track; 2. Guide strip; 21. Guide strip body; 22. First transition strip; 221. First transition section; 222. First plane section; 23. Second transition strip; 231. Second transition section; 232. Second plane section; 3. Overhead crane device; 31. Guide wheel; 32. Branch wheel; 33. Travel wheel; 4. Anti-collision guide block. DETAILED DESCRIPTION

[0028] The patent is described in detail below in conjunction with the accompanying drawings.

[0029] At present, the overhead crane moves along the set track during operation. The laid track often needs to be set with curves so that the overhead crane can run to other corners of the house to complete the transportation of goods.

[0030] However, the lengths of the inner and outer bends of the track are different, and the speeds of the running wheels on both sides of the overhead crane are the same during operation. That is to say, when the overhead crane passes a curve, if it continues to operate in the same way as running on a straight track, the linear speeds on both sides are the same, but the angular speeds are different. This may cause the overhead crane to shake due to the slippage of the running wheels.

[0031] In semiconductor factories, overhead cranes are often used to transport wafer materials. Such materials are extremely fragile and easily damaged by vibration. Therefore, how to make the overhead crane turn smoothly without vibration has become a technical problem that needs to be solved.

[0032] In view of this, a first embodiment of the present application provides a track device of an overhead travelling crane transportation system to solve the problem of shaking of the overhead travelling crane device when turning.

[0033] First embodiment

[0034] like Figure 1 , Figure 2The first embodiment of the present application is shown to provide a track 1 device of an overhead crane transportation system, comprising: two tracks 1 arranged at intervals, and a guide bar 2. The two tracks 1 arranged at intervals are used to hang an overhead crane device 3, and the track 1 has a curved portion. The guide bar 2 is arranged between the curved portions of the two tracks 1. The guide bar 2 comprises: a guide bar body 21 and a first transition bar 22. The guide bar body 21 is used to support a diverging wheel 32 of the overhead crane device 3, so that the diverging wheel 32 is maintained at a preset offset position and has a first offset, so as to keep one side of the overhead crane device 3 in a lifted state. The first transition bar 22 comprises: a first transition section 221 and a first plane section 222. The first transition section 221 is used to gradually increase the offset of the diverging wheel 32 until the first offset is reached, so as to guide the diverging wheel 32 to the guide bar body 21. The first plane section 222, the two ends of which are respectively connected to the first transition section 221 and the guide bar body 21.

[0035] When the overhead travelling device 3 runs on the track 1 to a curve, the diverging wheel 32 on the device will contact the guide bar 2 located between the two tracks 1. During the contact process, the diverging wheel 32 will gradually be squeezed by the guide bar 2, causing the diverging wheel 32 to deviate toward the track 1 on one side. As the overhead travelling device 3 further enters the curve, the deflection amount of the diverging wheel 32 will gradually increase until it reaches the first deflection amount. At this time, if Figure 8 and Fig. 9 As shown, the overhead crane device 3 will take the contact point between the running wheel 33 and the track 1 as the rotation center, and tilt to the side where the diverging wheel 32 is located, and the running wheel 33 of the overhead crane device 3 on the other side will be lifted and separated from the track 1, maintaining a certain height. At this time, only one side of the running wheel 33 of the overhead crane device 3 is in contact with the track 1, and the single-side running wheel 33 is used to achieve the turning, avoiding slipping and body shaking caused by different running distances of the running wheels 33 on both sides and different angular velocities when turning.

[0036] Specifically, when the overhead traveling device 3 moves to the entrance of the curve, the diverging wheel 32 will first contact the first transition section 221 on the first transition strip 22, and the first transition section 221 will gradually increase the offset of the diverging wheel 32. Figure 3 It can be seen that due to the installation characteristics of the overhead travelling device 3, there will be a front-to-back difference between the diverging wheel 32, the running wheel 33 and the guide wheel 31 when they move on the track 1. Therefore, it is difficult for the diverging wheel 32, the running wheel 33 and the guide wheel 31 to be in the same cross section perpendicular to the forward direction of the overhead travelling device 3. If the diverging wheel 32 directly contacts the guide bar body 21 after leaving the first transition section 221, it may cause the tangent of the contact point to be difficult to coincide with the movement direction of the diverging wheel 32, thereby causing the diverging wheel 32 to be squeezed by the guide bar body 21, resulting in the shaking of the overhead travelling device 3.

[0037] Therefore, in the present application, a first plane section 222 is also provided on the first transition strip 22. When the diverging wheel 32 leaves the first transition section 221, it will contact the first plane section 222. At this time, the first plane section 222 will not increase the offset of the diverging wheel 32, and the running wheel 33 and the guide wheel 31 on the overhead travelling device 3 will also be located in the straight part of the track 1, which can ensure the stability of the posture of the overhead travelling device 3 and prevent the running wheel 33 from bouncing and causing the vehicle body to shake.

[0038] After the diverging wheel 32 leaves the first plane section 222, it will gradually contact the guide bar body 21. At this time, the guide bar body 21 will further squeeze the diverging wheel 32, causing the overhead crane device 3 to tilt and lift one side of the running wheel 33. By providing the first plane section 222, the overhead crane device 3 is prevented from shaking during the lifting process of entering the curve, so that the overhead crane device 3 can be lifted more smoothly, reducing the probability of damage to the carried goods.

[0039] In addition, in each cross section perpendicular to the advancing direction of the overhead travelling device 3 , the distance between the cross section where the rotation center of the guide wheel 31 is located and the rotation center of the diverging wheel 32 is less than or equal to the length of the first plane segment 222 in the length direction of the guide strip body 21 .

[0040] Through the relationship between the first plane section 222, the diverging wheel 32 and the guide wheel 31, it can be ensured that when the diverging wheel 32 and the first plane section 222 are in contact with each other, the guide wheel 31 can always be located in the straight part of the track 1. Avoid the movement direction of the diverging wheel 32 and the guide wheel 31 cannot be adjusted in time due to the first plane section 222 being too short. For example, in some embodiments of the present invention, the distance between the rotation center of the guide wheel 31 and the rotation center of the diverging wheel 32 in the cross section can be 15mm, then the length of the first plane section 222 can also be 15mm, or between 15cm and 20cm, to ensure that the overhead travelling device 3 can always remain in a stable posture before one side is lifted.

[0041] In this embodiment, the main part of the diverging wheel 32 can be made of high-strength materials, such as steel, high-density polymer resin, ceramics, etc., to ensure durability under high pressure and high friction environments. Its design also takes into account shock absorption and noise reduction functions. For example, the periphery can be wrapped with shock absorption materials or use oil pressure buffers to improve the running stability of the overhead traveling device 3. The guide bar 2 is not only used to guide the diverging wheel 32, but also plays a role in stabilizing the overhead traveling device 3.

[0042] Second embodiment

[0043] The first embodiment provides a method of squeezing the diverging wheel 32 on the overhead crane device 3 by the guide bar 2, so that one side of the overhead crane device 3 is lifted so as to turn smoothly. However, when the diverging wheel 32 contacts the guide bar 2, the diverging wheel 32 may collide with the end of the guide bar 2 due to errors in the installation process of the diverging wheel 32. At the same time, the diverging wheels on some overhead crane devices 3 are slidable, and the movement of the diverging wheels at the top of the overhead crane device 3 is controlled by a program or PLC. Since the guide bar 2 needs to squeeze the diverging wheel 32, its material is relatively hard, so it may cause damage to the overhead crane device 3, the objects carried by the overhead crane device 3, and the track 1.

[0044] In view of this, the second embodiment of the present invention is Figure 1 , Figure 5 As shown, the track 1 device also includes: an anti-collision guide block 4, the anti-collision guide block 4 is connected to the first transition section 221, and the end of the anti-collision guide block 4 away from the first transition section 221 is an anti-collision end. There is an angle between the anti-collision end and the connecting line of the first plane section 222 and the first transition section 221 and the advancing direction of the overhead traveling device 3, and the size of the angle is 20°-45°. The thickness of the anti-collision guide block 4 increases first and then decreases from the anti-collision end.

[0045] If there is an installation error in the diverging wheel 32 on the overhead crane device 3 or the diverging wheel 32 is not in the correct position due to program control, when the overhead crane device 3 continues to enter the curve, the diverging wheel 32 may collide with the end of the guide bar 2. At this time, the anti-collision guide block 4 can protect the diverging wheel 32 and guide the diverging wheel 32 to move in the target direction to avoid direct contact with the guide bar 2. In some embodiments of the present invention, the diverging wheel 32 will be made of polyurethane wheel set, the anti-collision guide block 4 will be made of aluminum alloy or high-strength plastic, and the guide bar 2 will be made of aluminum alloy.

[0046] Further, the anti-collision end has an angle, and since the thickness of the anti-collision guide block 4 increases first and then decreases from the anti-collision end, the anti-collision end will form an arc, which plays a guiding role. Specifically, when the divergent wheel 32 that deviates from the preset path contacts the anti-collision guide block 4 and is buffered, it will move along the arc direction of the guide block, and thus be redirected to the guide bar 2. The divergent wheel 32 guided to the guide bar 2 will be further squeezed by the guide bar 2, thereby lifting the overhead crane device 3 to complete the turn. In an embodiment of the present invention, the angle between the line connecting the anti-collision end and the first plane section 222 and the first transition section 221 and the forward direction of the overhead crane device 3 is 35°. At this angle, the guide anti-collision block can not only play an anti-collision protection role, but also guide the divergent wheel 32 to the guide bar 2 more smoothly. The angle of 35° can cover most of the space between the two tracks 1, and the angle difference with the first transition section 221 is also small. This can reduce the vibration of the divergent wheel 32 caused by the transition between the anti-collision guide block 4 and the guide bar 2, thereby reducing the shaking of the overhead crane device 3, avoiding the collision between the guide bar 2 and the divergent wheel 32, and reducing the risk of damage to the goods carried by the overhead crane device 3.

[0047] Further, if Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the curved section includes at least two non-concentric curved sections, and the guide strip body 21 includes: a first arc section and a second arc section. The first arc section corresponds to and is concentric with the first curved section of the curved section. The second arc section corresponds to and is concentric with the second curved section of the curved section.

[0048] Since the guide bar body 21 needs to squeeze the diverging wheel 32 when the overhead crane device 3 is turning, one side of the overhead crane device 3 is kept lifted when turning. At the same time, continuous curves are often encountered when using the overhead crane, so the guide bar 2 also needs to maintain a corresponding arc segment with the track 1 to meet the continuous curves in the setting process of the track 1, so that one side of the overhead crane device 3 is kept lifted when turning. In the first embodiment, we know that the diverging wheel 32 will first contact with the first transition bar 22 during the contact with the guide bar 2, and realize the smooth transition of the posture of the overhead crane device 3 during the offset process through the first plane segment 222 of the first transition bar 22, and lift one side of the overhead crane device 3 after completing the smooth transition. Therefore, when the diverging wheel 32 leaves the first plane segment 222 and contacts the guide bar body 21, it enters the curve. At this time, the first arc segment can lift and squeeze the diverging wheel 32 in time, so that one side of the overhead crane device 3 is lifted. The circle of the first arc segment is concentric with the first curve, so that the first arc segment can match the first curve, ensuring that one side of the overhead crane device 3 is always lifted when the divergent wheel 32 turns, and the lifted overhead crane device 3 maintains an unchanged posture during the movement, thereby achieving the matching between the guide strip 2 and the first curve, avoiding the inability of the overhead crane device 3 to adapt to the changes in the curve when turning, or the overhead crane device 3 vibrates during operation, causing damage to the load.

[0049] Similarly, the second arc segment on the guide strip body 21 can correspond to the second curve section of the track 1, so that the lifting height of the overhead crane device 3 when passing through the second curve section of the curved section will not change with the operation of the overhead crane device 3, ensuring the stability of the overhead crane device 3 during continuous cornering.

[0050] In addition, if Figure 1 , Figure 2 The bending directions of two adjacent bends in the bend portion are opposite, and the guide strip 2 further comprises a straight transition section, with two ends respectively connected to the first arc section and the second arc section.

[0051] The first arc segment and the second arc segment with opposite bending directions are connected by a straight transition segment to form an S-shaped curve portion. The S-shaped curve portion is set to adapt to more different overhead crane usage scenarios. At the same time, if the first arc segment is directly connected to the second arc segment, due to their opposite bending directions, the movement direction of the overhead crane device 3 will swing twice in completely opposite directions, causing violent shaking. In addition, in the process of passing through the first arc segment and the second arc segment, one side of the overhead crane device 3 needs to remain lifted. The continuous arc segment will reduce the contact part between the overhead crane device 3 and the track 1, increasing the risk of falling. Therefore, a straight transition segment is set so that the divergent wheel 32 of the overhead crane device 3 can enter the straight transition segment after leaving the first arc segment, and then enter the second arc segment. This avoids a large change in the movement direction of the overhead crane device 3 and reduces the jitter during operation. At the same time, the straight transition segment also facilitates the conversion of the overhead crane device 3 between the first arc segment and the second arc segment, reducing the risk of derailment. More specifically, in order to further improve the stability of the overhead crane device 3 when turning, the straight transition section needs to maintain a tangent relationship at the connection between the first arc segment and the second arc segment to reduce the jitter of the divergent wheel 32 when moving from the first arc segment to the straight segment or from the straight segment to the second arc segment.

[0052] Furthermore, the length of the straight transition section is less than or equal to the difference between the distance between the rotation centers of the two guide wheels 31 and the distance between the rotation centers of the two divergent wheels 32 located on the same side of the overhead travelling device 3 .

[0053] The smaller straight transition section can reduce the length of the curved section, and at the same time, the diverging wheel 32 and the guide wheel 31 on the overhead crane device 3 can enter a straight running state during operation, thereby stabilizing the posture of the overhead crane device 3. In addition, the offset applied by the straight transition section to the diverging wheel 32 is the same as when the overhead crane device 3 is in the first arc section and the second arc section. In this way, it can be ensured that the extrusion of the diverging wheel 32 when passing through the straight transition section remains unchanged, so that one side of the overhead crane device 3 can always remain in a lifted state, avoiding unnecessary lifting and lowering actions during the process of passing through the S-shaped curved section, reducing the shaking of the overhead crane device 3 during the lifting and lowering process, and avoiding damage to the goods carried by the overhead crane device 3. More specifically, in an embodiment of the present invention, the difference between the distance between the rotation centers of the two guide wheels 31 and the distance between the rotation centers of the two diverging wheels 32 is 30 mm, and the length of the straight transition section is 28 mm. On the premise of stabilizing the posture of the overhead crane device 3, the footprint of the curved section of the track 1 is reduced.

[0054] Third embodiment

[0055] Through the first and second embodiments, we can obtain that the overhead travelling device 3 ready to enter the curved portion is stably guided to the guide bar body 21 by the first transition bar 22, and the overhead travelling device 3 is gradually offset during the guiding process, so as to avoid directly lifting one side of the overhead travelling device 3 after contacting the guide bar body 21, thereby improving the stability of the overhead travelling device 3 during operation. When the overhead travelling device 3 leaves the curved portion of the track 1, the speed of the overhead travelling device 3 will be relatively slowed down, but the overhead travelling device 3 may still shake during the descent of one side of the overhead travelling device 3, causing damage to the load.

[0056] In view of this, in the third embodiment of the present invention, Figure 2 , Figure 4 The guide bar 2 shown also includes: a second transition bar 23. The second transition bar 23 includes: a second transition section 231 and a second plane section 232. The second transition section 231 is used to gradually reduce the offset of the diverging wheel 32 from the first offset to 0, so as to guide the diverging wheel 32 from the guide bar body 21 to the homing position. The second plane section 232, the two ends of the second plane section 232 are respectively connected to the second transition section 231 and the guide bar body 21. In each cross section perpendicular to the forward direction of the overhead crane device 3, the distance between the cross section where the rotation center of the guide wheel 31 is located and the rotation center of the diverging wheel 32 is less than or equal to the length of the second plane section 232 in the length direction of the guide bar body 21, and the length of the first plane section 222 is greater than the length of the second plane section 232.

[0057] When the crane device 3 leaves the curve, one side of the crane device 3 will drop and re-contact the track 1. After the diverging wheel 32 separates from the guide bar 2 body, it will contact the second plane section 232 of the second transition bar 23. Similar to the function of the first plane section 222, when the diverging wheel 32 contacts the second plane section 232 and runs along the second plane section 232, the guide wheel 31 and the running wheel 33 of the crane device 3 can also run on the straight section of the track 1, thereby adjusting the posture of the crane device 3, avoiding the crane device 3 from making a large change in the offset and movement direction at the same time after leaving the curve, and preventing the crane device 3 from shaking. When the diverging wheel 32 leaves the second plane section 232, it will enter the second transition section 231, continue to move along the second transition section 231, and gradually reduce the offset of the crane device 3 during the curve to 0, so that the crane device 3 can stably travel on the subsequent straight track 1. In this way, the overhead crane device 3 remains stable when entering and exiting the curve during the curve, further reducing the shaking of the overhead crane device 3 and protecting the goods carried by the overhead crane device 3. The travel speed of the overhead crane device 3 before running to the curve is faster than when leaving the curve, so the length of the first plane section 222 is greater than the length of the second plane section 232, providing more distance for the overhead crane device 3 to adjust its posture. Of course, in this embodiment, since the travel speed of the overhead crane device 3 before running to the curve is the same as the speed when leaving the curve, the length of the second plane section 232 is the same as the length of the first plane section 222, both of which are 15 mm.

[0058] Furthermore, an anti-collision guide block 4 is provided and connected to the second transition section 231 to prevent the diverging wheel 32 of the overhead travelling device 3 from colliding with the end of the second transition section 231 during the process of separating from the second transition section 231, thereby protecting the diverging wheel 32. The guide end of the anti-collision guide block 4 can guide the diverging wheel 32, so that the offset of the diverging wheel 32 returns to 0, thereby ensuring the subsequent normal operation of the overhead travelling device 3.

[0059] Fourth embodiment

[0060] like Figure 6 , Figure 7The fourth embodiment of the present invention discloses a crane device 3, which is suitable for the track 1 device of the crane transportation system mentioned above. The crane device 3 includes: a crane body, at least two sets of running wheels 33 and a diverging wheel 32. The at least two sets of running wheels 33 are symmetrically arranged on the crane body, and the running wheels 33 roll along the track 1 to drive the crane body to move on the track 1. The rotation axis of the diverging wheel 32 and the rotation axis of the running wheel 33 intersect each other. When passing through the curved part of the track 1, the diverging wheel 32 gradually deviates from the original position under the support of the first transition section 221 of the first transition strip 22 and reaches the first offset, so as to lift one side of the crane device 3; the diverging wheel 32 is also used to contact the guide strip body 21 after passing through the first plane section 222, so as to keep one side of the crane device 3 in a lifted state.

[0061] The running wheels 33 of the overhead crane device 3 can run along the track 1, thereby driving the entire overhead crane body forward. When the overhead crane device 3 is turning, it is necessary to lift one of the running wheels 33 on both sides, so that the overhead crane device 3 can turn only by relying on the running wheels 33 on one side to contact the track 1, thereby preventing the running wheels 33 on both sides of the overhead crane device 3 from shaking due to the different lengths of the track 1 passed through. The divergent wheel 32 acts as a rotating fulcrum during the turning process of the overhead crane device 3, so the divergent wheel 32 needs to be set at the top of the overhead crane body, and after contacting with the guide bar body 21, it forms a Figure 8 , Fig. 9 The lifting state shown. Specifically, since the divergent wheels 32 need to be used as the prying fulcrum of the overhead crane device 3, the stability of the fulcrum will directly affect the lifting effect of the overhead crane device 3, so in this embodiment, the number of each group of divergent wheels 32 is 2. Two adjacent divergent wheels 32 can be offset at the same time under the action of the guide bar 2, and the contact points of the two divergent wheels 32 with the guide bar 2 are used as the fulcrum to deflect and lift the two running wheels 33 of the overhead crane device 3. The simultaneous action of the two divergent wheels 32 can ensure the stability of the fulcrum during the lifting of one side of the overhead crane device 3, and avoid the left and right shaking of the overhead crane device 3 during the lifting process caused by only one divergent wheel 32 as the fulcrum. Of course, in other embodiments, the number of divergent wheels 32 can also be set to more than 2. In order to avoid the sum of the diameters of the divergent wheels 32 exceeding the guide wheel 31, when the number of divergent wheels 32 increases, the diameter of the divergent wheels 32 can also be reduced accordingly. The specific number of divergent wheels 32 is not limited, as long as it can meet the cornering requirements of the overhead crane device 3.

[0062] Further, if Figure 7 At least two groups of guide wheels 31 are symmetrically arranged on the crane body. The guide wheels 31 abut against two opposite side walls of the two tracks 1 when entering the curve, and roll along the abutted side walls of the tracks 1 to guide the movement of the crane body.

[0063] The guide wheel 31 can guide the running direction of the overhead crane device 3 when turning. Since the overhead crane device 3 is hung on the track 1, the running wheel 33 may bounce due to the manufacturing tolerance of the track 1 during the running process, and when the overhead crane device 3 runs straight along the track 1, its posture may not be completely stable, so that it cannot ensure straight running, resulting in a direct collision between the overhead crane device 3 and the track 1. The guide wheel 31 set on the main body of the overhead crane can provide better running stability. More importantly, refer to Figure 8 As can be seen from the figure, when the overhead crane device 3 lifts one side to make a turn, the running wheel 33 on the side that is not lifted will contact the track 1 and continue to run along the track 1. The guide wheel 31 will also contact the side wall of the track 1. Since the guide wheel 31 does not have an independent power source, the rotation speed of the guide wheels 31 on both sides will not always remain the same during the operation of the overhead crane device 3, but will match the track 1 in contact. The contact between the guide wheel 31 and the side wall of the track 1 further ensures the stability of the overhead crane device 3 when making a turn, instead of relying solely on the single-side running wheel 33 to travel on the track 1. In this way, the stability of the operation of the overhead crane device 3 is ensured, and the shaking generated when the overhead crane device 3 makes a turn is reduced. Of course, in the embodiment of the present invention, when the overhead crane device 3 travels in a straight line along the track 1, the guide wheel 31 will maintain a gap with the track 1, thereby reducing the resistance of the overhead crane device 3 during the travel process. Specifically, in the embodiment of the present invention, the gap between the guide wheel 31 and the track 1 is 0.5 mm.

[0064] Fifth embodiment

[0065] The embodiment of the present invention further provides an overhead crane system, which includes the track 1 device of the overhead crane transportation system described above, and the overhead crane device 3 described above which is arranged on the track 1 device.

[0066] When the overhead crane system adopts the track 1 device and the overhead crane device 3 of the overhead crane transportation system, the track 1 device can meet the operation requirements of the overhead crane device 3. Since the curved part on the track 1 device can make the overhead crane device 3 pass smoothly and not easily shake in the curved part, it can match many different usage scenarios of the overhead crane system. The usage scenarios of the overhead crane system are increased, and thanks to the smooth cornering of the overhead crane device 3, the probability of damage to the goods carried by the overhead crane device 3 is effectively reduced.

[0067] Finally, it should be noted that ordinary technicians in this field can understand that in order to make readers better understand this patent, the implementation methods of this patent propose many technical details. However, even without these technical details and various changes and modifications based on the above-mentioned implementation methods, the technical solutions claimed for protection by the claims of this patent can be basically realized. Therefore, in practical applications, various changes can be made to the above-mentioned implementation methods in form and details without departing from the spirit and scope of this patent.

Claims

1. A track device for an overhead crane transportation system, characterized in that: include: Two rails arranged at intervals are used to mount the overhead travelling device, and the rails have a curved section; A guide bar, arranged between the curved sections of the two tracks; The guide strip comprises: A guide bar body, used for supporting the diverging wheel of the overhead travelling device, so that the diverging wheel is kept at a preset offset position and has a first offset, so as to keep one side of the overhead travelling device in a lifted state; The first transitional article includes: a first transition section, used for gradually increasing the diverging wheel offset until reaching the first offset, so as to guide the diverging wheel onto the guide bar body; A first plane section, two ends of which are respectively connected to the first transition section and the guide bar body; The overhead travelling crane device comprises: Crane main body; At least two sets of running wheels are symmetrically arranged on the main body of the overhead travelling vehicle, and the running wheels roll along the track to drive the main body of the overhead travelling vehicle to move on the track; A divergent wheel, wherein the rotation axis of the divergent wheel intersects with the rotation axis of the running wheel; When passing through a curved portion of the track, the divergent wheel is gradually offset relative to the original position and reaches a first offset amount under the support of the first transition section of the first transition bar, so as to lift one side of the overhead crane device; the divergent wheel is also used to contact the guide bar body after passing through the first plane section, so as to keep one side of the overhead crane device in a lifted state.

2. The track device of the overhead travelling vehicle transportation system according to claim 1, characterized in that: In each cross section perpendicular to the advancing direction of the overhead travelling crane, the distance between the cross section where the rotation center of the guide wheel is located and the rotation center of the diverging wheel is less than or equal to the length of the first plane segment in the length direction of the guide bar body.

3. The track device of the overhead travelling vehicle transportation system according to claim 1, characterized in that: The track device also includes: An anti-collision guide block, wherein the anti-collision guide block is connected to the first transition section, and an end of the anti-collision guide block away from the first transition section is an anti-collision end portion; There is an angle between the line connecting the anti-collision end and the connection between the first plane section and the first transition section and the moving direction of the overhead travelling device, and the angle is 20°-45°; The thickness of the anti-collision guide block increases first and then decreases starting from the anti-collision end portion.

4. The track device of the overhead travelling vehicle transportation system according to claim 1, characterized in that: The curved section includes at least two non-concentric curved sections, The guide bar body comprises: A first arc segment, corresponding to and concentric with the first curve of the curve portion; The second arc segment corresponds to and is concentric with the second segment of the curve of the curve portion.

5. The track device of the overhead travelling vehicle transportation system according to claim 4, characterized in that: The bending directions of two adjacent bends of the bend portion are opposite, and the guide bar body further comprises: A straight transition segment has two ends respectively connected to the first arc segment and the second arc segment.

6. The track device of the overhead travelling vehicle transportation system according to claim 5, characterized in that: The length of the straight transition section is less than or equal to the difference between the distance between the rotation centers of the two guide wheels located on the same side of the overhead travelling device and the distance between the rotation centers of the two divergent wheels.

7. The track device of the overhead travelling vehicle transportation system according to any one of claim 2, characterized in that: The guide bar also includes: The second transitional clause includes: a second transition section, used for gradually reducing the diverging wheel offset from the first offset to 0, so as to guide the diverging wheel from the guide bar body to a homing position; a second plane segment, two ends of which are respectively connected to the second transition segment and the guide bar body; In each cross section perpendicular to the advancing direction of the overhead travelling device, the distance between the cross section where the rotation center of the guide wheel is located and the rotation center of the diverging wheel is less than or equal to the length of the second plane segment in the length direction of the guide bar body; The length of the first planar segment is greater than the length of the second planar segment.

8. The track device of the overhead travelling vehicle transportation system according to claim 1, characterized in that: At least two sets of guide wheels are symmetrically arranged on the crane body. When entering the curved portion, the guide wheels abut against two side walls opposite to the two tracks and roll along the abutted side walls of the tracks to guide the movement of the crane body.

9. An overhead travelling crane system, characterized in that: The overhead crane system comprises a track device of the overhead crane transportation system according to any one of claims 1 to 8, and an overhead crane device arranged on the track device.

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