A blocking structure for preventing a shuttle vehicle from accidentally exiting a car

Abstract

This invention belongs to the technical field of safety protection structures, and in particular relates to a blocking structure for preventing shuttle vehicles from accidentally exiting an elevator car. By installing a fixed shaft unit, a rotating plate unit, a movable permanent magnet, and a rotating electromagnet unit on the elevator car chassis, and installing fixed permanent magnets on the shelf layer, this invention ensures the long-term effectiveness of the blocking protection function and a relatively short maintenance time.

Description

Technical Field

[0001] The present invention belongs to the technical field of safety protection structures, and in particular relates to a blocking structure for preventing a shuttle vehicle in an elevator car from accidentally exiting. Background Art

[0002] In the warehousing and logistics industry, in order to improve space utilization, a combination of shuttle vehicles + elevators + high-density stereoscopic warehouses is generally chosen.

[0003] The general principle of this system is that the shuttle can be used to transport goods within the same rack level or between different rack levels. The former does not require an elevator, but the latter does. The shuttle first leaves the initial rack level and enters the elevator car, which then raises and lowers the elevator car. Finally, the shuttle car exits the elevator car and arrives at the target rack level. The biggest safety hazard in this process is that the shuttle car could accidentally exit the elevator car before it aligns with the target rack level, causing it to fall, which is extremely dangerous.

[0004] Therefore, this is the purpose of the above-mentioned blocking structure. In other words, the blocking structure needs to achieve the following two points: first, the blocking effect must remain in effect during the elevator car's rise and fall, that is, before it aligns with the target shelf level; second, the blocking effect must be closed when the elevator car aligns with the target shelf level and cannot be accidentally opened.

[0005] In this way, the shuttle vehicle can be used in a high-density three-dimensional warehouse for a long time, safely and efficiently.

[0006] A Chinese utility model patent with patent publication number CN205663697U and publication date 2016.10.26 discloses a mechanical magnet-type limit device, including a moving block, a limit block, a limit pin, a return spring and a positioning magnet, and its peripheral structure is the object to be limited.

[0007] The limiting device in this utility model patent generally works on the following principle: when the moving block and the limiting block are not in contact, the two positioning magnets do not interact with each other, the reset spring is released, the limited object is restricted by the limiting pin, and the limited object cannot move up and down; when the moving block and the limiting block are in contact, the two positioning magnets attract each other due to the magnetic force, the positioning magnet drives the limiting pin to move to the right, the reset spring is compressed, the limiting pin no longer contacts the limited object, and the limited object can move up and down.

[0008] However, if the limit device is installed on the car to block the protective shuttle, there are at least two disadvantages. In other words, they are the technical problems to be solved by the present invention.

[0009] First, the part that triggers the blocking action is the return spring, which relies on its elasticity. However, its elastic strength will inevitably decrease gradually, so the final limiting protection effect is not long-lasting. This is even more fatal when the shuttle needs to frequently enter and exit the car.

[0010] Secondly, similarly, the two positioning magnets, due to their relatively high frequency of use, will experience demagnetization or physical damage, resulting in a poor service life. Ultimately, replacing the springs or the positioning magnets will require the elevator to be shut down for extended periods of time, a significant loss for high-speed warehouse logistics.

[0011] Therefore, in summary, there is an urgent need for a new type of blocking structure for shuttle vehicles with long-lasting blocking protection effect, low maintenance frequency and short maintenance process time. Summary of the Invention

[0012] The present invention provides a blocking structure for preventing a shuttle vehicle from accidentally exiting an elevator car. The blocking structure can ensure that its blocking and protection function is effective for a long time and the total time required for maintenance is relatively short by arranging a fixed shaft unit, a rotating plate unit, a movable permanent magnet and a rotating electromagnet unit on the elevator car base frame and arranging a fixed permanent magnet on the shelf layer.

[0013] The technical solution adopted by the present invention to solve the above-mentioned problem is: a blocking structure for preventing a shuttle vehicle from accidentally exiting a car, comprising a fixed shaft unit arranged on the outer side of the car frame, a rotating plate unit sleeved on the fixed shaft unit, and one end of which is used to block and protect the shuttle vehicle, a movable permanent magnet arranged at the other end of the fixed shaft unit, a fixed permanent magnet arranged on the outer side of the shelf layer, and used to rotate and retract the rotating plate unit by magnetically attracting the movable permanent magnet, and a rotating electromagnet unit arranged on the outer side of the car frame and used to magnetically attract and replace the movable permanent magnet.

[0014] A further preferred technical solution is that the fixed shaft unit includes a transverse cylinder arranged on the outer side of the car frame, and two outer nuts arranged on the transverse cylinder and used to block the rotating plate unit.

[0015] A further preferred technical solution is that the rotating plate unit includes a rectangular plate, which is arranged on the rectangular plate and inserted into the mounting hole of the transverse cylinder, and an adjustment hole which is arranged at one end of the rectangular plate and is used to insert and install the movable permanent magnet.

[0016] A further preferred technical solution is that the movable permanent magnet is a bar magnet, which is located on both sides of the rectangular plate and is used to magnetically attract the fixed permanent magnet and / or the rotating electromagnet unit.

[0017] A further preferred technical solution is that the rotating plate unit further includes a counterweight block provided on the rectangular plate and close to one end of the adjustment hole.

[0018] A further preferred technical solution is that the rotating plate unit further includes two circles of balls respectively embedded on two side surfaces of the rectangular plate and arranged around the mounting hole.

[0019] A further preferred technical solution is that the fixed shaft unit further includes an inner limiting ring provided on the transverse cylinder and used for supporting the balls of the inner ring and providing installation space for the rotating electromagnet unit.

[0020] A further preferred technical solution is that the fixed shaft unit further includes an outer limiting ring which is arranged on the outer nut, sleeved with the transverse cylinder, and used to support the balls of the outer ring.

[0021] A further preferred technical solution is that the rotating electromagnet unit includes a stepper motor arranged on the outer side of the car frame, a rotating shaft arranged on the stepper motor, and a retraction electromagnet arranged on the end face of the rotating shaft and used to magnetically attract the movable permanent magnet.

[0022] A further preferred technical solution is that the rotating electromagnet unit further includes a central opening provided on the rotating shaft, and a spare electromagnet provided on the central opening and used to replace the movable permanent magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the use of the present invention.

[0024] Figure 2 This is a schematic diagram of the position structure of the blocking structure in the present invention when it is in the "open" state.

[0025] Figure 3 This is a schematic diagram of the position structure of the blocking structure in the present invention when it is in the "retracted" state.

[0026] Figure 4 It is a schematic diagram of the position structure of the fixed shaft unit and the rotating plate unit in the present invention.

[0027] Figure 5 Schematic diagram of the position structure of the rotating electromagnet unit in the present invention.

[0028] In the accompanying drawings, the meanings of the reference numerals are as follows.

[0029] Car frame a, shuttle car b, shelf layer c, car track d, shelf track e.

[0030] Fixed shaft unit 1, rotating plate unit 2, movable permanent magnet 3, fixed permanent magnet 4, rotating electromagnet unit 5.

[0031] Horizontal cylinder 101, outer nut 102, rectangular plate 201, mounting hole 202, adjustment hole 203, counterweight 204, ball 205, inner limit ring 103, outer limit ring 104, stepper motor 501, rotating shaft 502, retraction electromagnet 503, middle opening 504, spare electromagnet 505. DETAILED DESCRIPTION

[0032] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0033] As attached Figure 1-5 As shown, a blocking structure for preventing a shuttle vehicle from accidentally exiting a car comprises a fixed axis unit 1 arranged on the outer side of a car chassis a, a rotating plate unit 2 which is sleeved on the fixed axis unit 1 and has one end for blocking and protecting the shuttle vehicle b, a movable permanent magnet 3 arranged at the other end of the fixed axis unit 1, a fixed permanent magnet 4 which is arranged on the outer side of a shelf layer c and is used to rotate and retract the rotating plate unit 2 by magnetically attracting the movable permanent magnet 3, and a rotating electromagnet unit 5 which is arranged on the outer side of a car chassis a and is used to magnetically attract and replace the movable permanent magnet 3.

[0034] In this embodiment, the car can only stop when the car track d is aligned with any shelf track e. At this point, the shuttle b can move in and out. The rotating plate unit 2 has only two valid states: first, in the open state, the rotating plate unit 2 is vertical, and its upper end can block the shuttle b, preventing it from accidentally sliding out; second, in the retracted state, the rotating plate unit 2 is horizontal and does not extend beyond the area of ​​the side panels of the car chassis a, thus making it impossible to block the shuttle b.

[0035] Therefore, the function of the fixed shaft unit 1 is to ensure that the rotating plate unit 2 can rotate and to avoid harmful inner and outer sliding as much as possible.

[0036] In addition, a fixed permanent magnet 4 is provided on the outer surface of each shelf layer c. Before the car stops normally, the fixed permanent magnet 4 has begun to magnetically attract the movable permanent magnet 3. The position and angle of the initial attraction do not need to be specially set. It is only necessary to ensure that when the car stops normally, the fixed permanent magnet 4 fully magnetically attracts the movable permanent magnet 3, that is, the attractive magnetic force is sufficient to "flatten" the rotating plate unit 2.

[0037] In addition, for the rotating plate unit 2 itself, with the fixed shaft unit 1 as the midpoint, its two ends are "one heavy and the other light", and the heavy end is provided with the movable permanent magnet 3, and the above-mentioned attractive magnetic force is used to "level out" this weight difference.

[0038] Finally, there is the rotating electromagnet unit 5, which has two main functions.

[0039] First, when the magnetic force of the fixed permanent magnet 4 is significantly reduced or completely insufficient, it is used to assist or replace the fixed permanent magnet 4. At this time, it is necessary to quickly equip a new fixed permanent magnet 4. In other words, this avoids the event of the elevator being shut down for maintenance.

[0040] Secondly, similarly, when the magnetic force of the movable permanent magnet 3 is significantly reduced, the movable permanent magnet 3 is replaced only for a short period of emergency and transition, and then a new movable permanent magnet 3 needs to be equipped as soon as possible, which can also avoid the event of the elevator being shut down for maintenance.

[0041] The fixed shaft unit 1 includes a transverse cylinder 101 provided on the outer side of the car bottom frame a, and two outer nuts 102 provided on the transverse cylinder 101 and used to block the rotating plate unit 2.

[0042] In this embodiment, the end of the transverse cylinder 101 away from the car frame a is the outer end, and a threaded section of sufficient and appropriate length is provided on the outer section of the transverse cylinder 101. The two outer nuts 102 are clamped together to finally fix and limit the rotating plate unit 2.

[0043] The rotating plate unit 2 includes a rectangular plate 201, which is arranged on the rectangular plate 201 and inserted into the mounting hole 202 of the transverse cylinder 101, and an adjustment hole 203 arranged at one end of the rectangular plate 201 and used for inserting and mounting the movable permanent magnet 3.

[0044] In this embodiment, the blocking structure is to protect the shuttle b from being accidentally ejected, and this is done by relying on its structural strength. In other words, the transverse cylinder 101, the outer nut 102, and the rectangular plate 201 must all be made of high-strength steel.

[0045] In addition, the mounting hole 202 can also be appropriately far away from the movable permanent magnet 3, so that the rectangular plate 201 itself can have one end with the movable permanent magnet 3 hanging down and the other end tilted upward to block the protective shuttle b.

[0046] Finally, the fixed permanent magnet 4 and the rotating electromagnet unit 5 assist each other, magnetically attracting the movable permanent magnet 3. Therefore, when the magnetic force of the fixed permanent magnet 4 is sufficient, the movable permanent magnet 3 can be pulled slightly toward the side of the fixed permanent magnet 4 in the adjustment hole 203. Otherwise, it should be pulled in the opposite direction. Of course, excessive pulling should be avoided, otherwise the movable permanent magnet 3 may collide with the shelf layer c.

[0047] The movable permanent magnet 3 is a bar magnet, which is located on both sides of the rectangular plate 201 and is used to magnetically attract the fixed permanent magnet 4 and / or the rotating electromagnet unit 5 .

[0048] In this embodiment, the fixed permanent magnet 4 and the rotating electromagnet unit 5 are not facing the magnetic poles of the movable permanent magnet 3, but are close to the ends of the bar magnets, so the magnetic strength is relatively large.

[0049] Among them, the way in which the rotating electromagnet unit 5 independently magnetically attracts the movable permanent magnet 3 is set to an emergency state and a transition state, which only provides time for the replacement operation of the fixed permanent magnet 4, thereby avoiding long-term shutdown of the elevator and substantial economic losses to the storage system.

[0050] The rotating plate unit 2 further includes a counterweight 204 disposed on the rectangular plate 201 and located near one end of the adjustment hole 203 .

[0051] In this embodiment, the rectangular plate 201 is made of steel. Therefore, along half the length of the movable permanent magnet 3, the adjustment hole 203 reduces weight, while the movable permanent magnet 3 increases weight. Furthermore, the offset of the mounting hole 202 can increase weight. However, due to the combined effects of these three factors, the weight of this half-length portion may still not allow one end of the movable permanent magnet 3 to freely hang down. Therefore, the counterweight 204 is provided, also made of steel.

[0052] The rotating plate unit 2 further includes two circles of balls 205 respectively embedded on two side surfaces of the rectangular plate 201 and arranged around the mounting hole 202 .

[0053] In this embodiment, the balls 205 can provide relatively small rotational friction resistance to the rectangular plate 201 .

[0054] The fixed shaft unit 1 further includes an inner limiting ring 103 disposed on the transverse cylinder 101 and used to support the balls 205 of the inner ring and provide an installation space for the rotating electromagnet unit 5 .

[0055] In this embodiment, the inner limiting ring 103 is fixed to the transverse cylinder 101 or formed integrally therewith, and has two functions:

[0056] First, a platform for rolling friction is provided for the ball 205 during the rotation process; second, the rotating plate unit 2 and the movable permanent magnet 3 are "lifted away" from the side plate of the car frame a to make room for the rotating electromagnet unit 5 to be installed.

[0057] The fixed shaft unit 1 further includes an outer limiting ring 104 which is arranged on the outer nut 102 and is sleeved with the transverse cylinder 101 and is used to support the outer ring of the balls 205 .

[0058] In this embodiment, the difference between the outer limiting ring 104 and the inner limiting ring 103 is that the former is sleeved and rotatably mounted together with one of the outer nuts 102 .

[0059] The rotating electromagnet unit 5 includes a stepper motor 501 arranged on the outer surface of the car frame a, a rotating shaft 502 arranged on the stepper motor 501, and a retracting electromagnet 503 arranged on the end surface of the rotating shaft 502 and used to magnetically attract the movable permanent magnet 3.

[0060] In this embodiment, an independent power supply is provided on the car chassis a for supplying power to the rotating electromagnet unit 5. One end of the rotating shaft 502 is connected to the motor shaft of the stepping motor 501, and the other end is provided with the retracting electromagnet 503.

[0061] Finally, the rotating shaft 502 rotates only in the lower half to avoid hitting the car track d, shelf track e, etc. above. When the retraction electromagnet 503 rotates to the side closest to the fixed axis unit 1, it is necessary to ensure that its electromagnetic force is sufficient to attract the movable permanent magnet 3 and make the rotating plate unit 2 horizontal.

[0062] In other words, the magnetic forces of the movable permanent magnet 3 , the fixed permanent magnet 4 , and the rotating electromagnet unit 5 need to be relatively large to overcome the gravity difference caused by the unequal weight on both sides of the rotating plate unit 2 .

[0063] The rotating electromagnet unit 5 further includes a central opening 504 provided on the rotating shaft 502 , and a spare electromagnet 505 provided on the central opening 504 and used to replace the movable permanent magnet 3 .

[0064] In this embodiment, the wires on the retracting electromagnet 503 and the spare electromagnet 505 are appropriately long to ensure that the wires are not pulled when the two are rotated or replaced. When the spare electromagnet 505 is inserted into the adjustment hole 203, the fixed permanent magnet 4 and the retracting electromagnet 503 can both perform magnetic attraction operation on it.

[0065] Finally, this embodiment has the following advantages.

[0066] First, the fixed shaft unit 1 and the rotating plate unit 2 rely on the high strength of their own materials to ensure that they can fully block and protect the shuttle b.

[0067] Second, the driving force for the rotating plate unit 2 to maintain the protective action "open" is essentially weight, so there is no attenuation problem.

[0068] Third, when any one of the movable permanent magnet 3 and the fixed permanent magnet 4 shows signs of magnetic force decline, the rotating electromagnet unit 5 can be immediately powered on for emergency, transitional, and supplementary magnetic attraction, so that the elevator does not need to be shut down for a long time, reducing economic losses. At this time, the permanent magnet material can be replaced as soon as possible.

[0069] Fourth, the rotating plate unit 2 rotates stably and smoothly, and only rotates 90° throughout the entire process, thus avoiding interference with the normal operation of the car and shuttle car.

[0070] Fifth, the entire blocking structure itself has high stability and good compactness, and the overall usage is more flexible and ingenious.

[0071] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the aforementioned embodiments. Various modifications are possible within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. These modifications are non-inventive and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A blocking structure for preventing a shuttle vehicle from accidentally exiting a car, characterized in that: The invention comprises a fixed shaft unit (1) arranged on the outer side of the car chassis (a), a rotating plate unit (2) sleeved on the fixed shaft unit (1) and having one end used to block the protective shuttle (b), a movable permanent magnet (3) arranged at the other end of the fixed shaft unit (1), a fixed permanent magnet (4) arranged on the outer side of the shelf layer (c) and used to rotate and retract the rotating plate unit (2) by magnetically attracting the movable permanent magnet (3), and a rotating electromagnet unit (5) arranged on the outer side of the car chassis (a) and used to magnetically attract and replace the movable permanent magnet (3). The fixed shaft unit (1) comprises a transverse cylinder (101) arranged on the outer side of the car bottom frame (a), and two outer nuts (102) arranged on the transverse cylinder (101) and used to block the rotating plate unit (2). The rotating plate unit (2) comprises a rectangular plate (201), a mounting hole (202) arranged on the rectangular plate (201) and inserted into the transverse cylinder (101), and an adjustment hole (203) arranged at one end of the rectangular plate (201) and used for inserting and mounting the movable permanent magnet (3). The movable permanent magnet (3) is a bar magnet, located on both sides of the rectangular plate (201), and is used to magnetically attract the fixed permanent magnet (4) and / or the rotating electromagnet unit (5). The rotating electromagnet unit (5) includes a stepping motor (501) arranged on the outer side of the car chassis (a), a rotating shaft (502) arranged on the stepping motor (501), and a retracting electromagnet (503) arranged on the end face of the rotating shaft (502) and used for magnetically attracting the movable permanent magnet (3). The rotating electromagnet unit (5) further comprises a central opening (504) provided on the rotating shaft (502), and a spare electromagnet (505) provided on the central opening (504) and used to replace the movable permanent magnet (3).

2. A blocking structure for preventing a shuttle vehicle from accidentally exiting a car according to claim 1, characterized in that: The rotating plate unit (2) further comprises a counterweight (204) provided on the rectangular plate (201) and located near one end of the adjustment hole (203).

3. The blocking structure for preventing a shuttle vehicle from accidentally exiting a car according to claim 1, characterized in that: The rotating plate unit (2) further comprises two circles of rolling balls (205) respectively embedded on two side surfaces of the rectangular plate (201) and arranged around the mounting hole (202).

4. The blocking structure for preventing a shuttle vehicle from accidentally exiting a car according to claim 3, characterized in that: The fixed shaft unit (1) further comprises an inner limiting ring (103) arranged on the transverse cylinder (101) and used to support the balls (205) of the inner ring and provide installation space for the rotating electromagnet unit (5).

5. The blocking structure for preventing a shuttle vehicle from accidentally exiting a car according to claim 3, characterized in that: The fixed shaft unit (1) further comprises an outer limiting ring (104) which is arranged on the outer nut (102), sleeved with the transverse cylinder (101), and used for supporting the outer ring of the ball (205).

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