Wheel stopping mechanism, lifting platform and OHT suspension type lifting system

Abstract

The utility model provides a wheel stopping mechanism, a lifting platform and an OHT suspension type lifting system. The wheel stopping mechanism comprises a locking part and an unlocking part, the locking part is used for stopping one wheel of the OHT trolley in the lifting process of the OHT trolley, the unlocking part is used for releasing stopping of the locking part on the wheel when the OHT trolley rises to the preset height, the locking part comprises a first connecting arm, a hinge part and a second connecting arm used for stopping the wheel, and the first connecting arm, the hinge part and the second connecting arm are sequentially connected. The locking part is configured to rotate around a pivot penetrating through the hinge part, and the included angle between the first connecting arm and the second connecting arm is an obtuse angle. According to the wheel stopping mechanism, the second connecting arm of the locking part can stop the wheel, sliding of the OHT trolley in the lifting process is prevented, when the OHT trolley rises to the preset height, the unlocking part can make the second connecting arm unlock and stop the wheel, the procedure that a driving motor is installed on a lifting platform to stop the wheel of the OHT trolley is omitted, and cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of handling systems, and more specifically, relates to a wheel stopping mechanism, a lifting platform and an OHT suspended lifting system. Background Technique

[0002] With the continuous development of semiconductor technology, system integrators need to continuously improve production efficiency and reduce costs to adapt to the technological development. The overhead hoist transport system (OHT) is an important automatic handling system in semiconductor manufacturing plants. Through it, the material transportation efficiency can be improved, the labor cost can be reduced, and the workshop space occupancy rate can be reduced, so as to fundamentally improve the overall production process. And to lift the OHT cart to the OHT empty track, a lifting device is required to transport the OHT cart.

[0003] In order to ensure the safety and stability of the OHT cart during the lifting process, the lifting device will design a firm guiding frame on the ground, but its structure is redundant and it consumes a large amount of design, production and installation costs, and has gradually been phased out. The current more advanced design is to use the method of belt winding to lift the OHT cart. This method cancels all the ground fixing mechanisms, places the driving motor on the roof, one driving motor controls four winding wheels, and each winding wheel controls four belts respectively fixed at the four corners of the lifting platform. The motor rotates to control the belt to drive the lifting platform to rise slowly. The cart wheels themselves are equipped with a braking system, and the anti-slip resistance is provided by the friction between the cart wheels and the lifting track to ensure that the OHT cart remains stable during the rising and falling process with the lifting platform. However, in actual working conditions, since the lifting height is about three meters and the stretching tool used is a belt, which has elasticity, the slight difference between the four belts will generate large vibrations and shakes during the long-distance lifting process, thereby causing the sliding of the OHT cart wheels.

[0004] In order to prevent the OHT cart from sliding during the lifting process, technicians have designed a variety of wheel clamping mechanisms, but the same purpose is to block the wheels during the lifting of the cart and then open the wheel clamping mechanism when the cart leaves the lifting platform to realize the passage of the cart. The existing wheel clamping mechanisms all require the installation of a motor driving device to work. However, the assembly method of the motor driving device is complex and the installation cost is high. Summary of the Utility Model

[0005] The purpose of the embodiments of the present utility model is to provide a wheel stopping mechanism, a lifting platform and an OHT suspended lifting system to solve the technical problem that the wheel clamping mechanism in the existing OHT suspended lifting system needs to install a motor driving device, and the assembly method is complex and the cost is high.

[0006] To achieve the above object, the technical solution adopted by the present utility model is as follows: In a first aspect of the present utility model, a wheel blocking mechanism is provided for an OHT suspended lifting system. The wheel blocking mechanism includes a locking portion and an unlocking portion. The locking portion is configured to block a wheel of the OHT cart during the lifting and lowering process of the OHT cart, and the unlocking portion is configured to release the blocking of the wheel by the locking portion when the OHT cart is lifted to a predetermined height.

[0007] The locking portion includes a first connecting arm, a hinge portion, and a second connecting arm for blocking the wheel, which are connected in sequence. The locking portion is configured to be rotatable about a pivot shaft passing through the hinge portion, and the included angle between the first connecting arm and the second connecting arm is an obtuse angle.

[0008] In one embodiment, an installation portion is further included, and the installation portion is used to fix the wheel blocking mechanism to the parking track.

[0009] In one embodiment, the unlocking portion includes a trigger member and an elastic member. The trigger member is configured to drive the first connecting arm to rotate along a first direction under the action of an external force, and the elastic member is configured to reset the first connecting arm.

[0010] In one embodiment, the trigger member includes a contact member and a follower seat. The contact member is configured to apply a force to the trigger member, and its height is adjustable. The follower seat is hingedly connected to the first connecting arm.

[0011] In one embodiment, the contact member includes a chute rod and a connecting rod. The connecting rod can slide in the chute of the chute rod, and the chute rod and the connecting rod are detachably connected by a fixing member.

[0012] In one embodiment, a pressure roller is provided at one end of the connecting rod away from the chute rod.

[0013] In one embodiment, a grip is provided on the follower seat for manually unlocking the locking portion.

[0014] In one embodiment, a slide rail is provided on the installation portion, a slider cooperating with the slide rail is installed on the follower seat, and a limiting block for the slider is provided on the installation portion.

[0015] In a second aspect of the present utility model, a lifting platform is provided, including a parking track for the OHT cart, and the above-mentioned wheel blocking mechanism is provided on the parking track.

[0016] In a third aspect of the present utility model, an OHT suspended lifting system is provided, including a lifting platform, and the lifting platform is the above-mentioned lifting platform.

[0017] The wheel blocking mechanism provided by the present utility model is used for the OHT suspension lifting system. The wheel blocking mechanism includes a locking part and an unlocking part. The locking part is used to block a wheel of the OHT cart during the lifting and lowering process of the OHT cart. The unlocking part is used to release the blocking of the wheel by the locking part when the OHT cart rises to a predetermined height. The locking part includes a first connecting arm, a hinged part, and a second connecting arm for blocking the wheel, which are connected in sequence. The locking part is configured to be able to rotate around a pivot shaft passing through the hinged part, so that the second connecting arm blocks the wheel and releases the blocking of the wheel. The included angle between the first connecting arm and the second connecting arm is an obtuse angle. The second connecting arm of the locking part of the wheel blocking mechanism can block the wheel, preventing the OHT cart from sliding during the lifting and lowering process. When the OHT cart rises to a predetermined height, the unlocking part can make the second connecting arm release the blocking of the wheel, reducing the process of installing a driving motor on the lifting platform to block the wheels of the OHT cart and lowering the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of a partial structure of the OHT suspension lifting system provided by an embodiment of the present utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the wheel blocking mechanism provided by an embodiment of the present utility model in the blocking state;

[0021] Figure 3 It is a schematic diagram of the structure of the wheel blocking mechanism provided by an embodiment of the present utility model in the unlocked blocking state;

[0022] Figure 4 It is a schematic diagram of the structure of the wheel blocking mechanism provided by an embodiment of the present utility model installed on the parking track;

[0023] Figure 5 It is a schematic diagram of the structure of the locking part of the wheel blocking mechanism provided by an embodiment of the present utility model;

[0024] Figure 6 It is a schematic diagram of the structure of the locking part of the wheel blocking mechanism provided by an embodiment of the present utility model blocking the wheel of the OHT cart;

[0025] Figure 7 It is a schematic diagram of the structure of the locking part of the wheel blocking mechanism provided by an embodiment of the present utility model in the unlocked state;

[0026] Figure 8 Schematic structural diagram of the wheel blocking mechanism provided by an embodiment of the present utility model from a perspective;

[0027] Figure 9 is Figure 8 Schematic cross-sectional structure diagram of section A-A in

[0028] Figure 10 Top view of the locking part of the wheel blocking mechanism provided by an embodiment of the present utility model in the blocking state.

[0029] The reference numerals are as follows:

[0030] 1 - Wheel blocking mechanism; 2 - Ceiling mounting assembly; 3 - Lifting platform; 4 - OHT cart; 11 - Locking part; 12 - Unlocking part; 13 - Mounting part; 31 - Parking track; 111 - Hinge part; 112 - First connecting arm; 113 - Second connecting arm; 114 - Buffer block; 115 - Extension arm; 116 - Reinforcing member; 121 - Trigger member; 122 - Elastic member; 131 - First mounting part; 132 - Second mounting part; 133 - Rotating shaft; 134 - Slide rail; 135 - Limiting block; 1211 - Follow-up seat; 1212 - Chute rod; 1213 - Connecting rod; 1214 - Slide block; 1215 - Grip; 1216 - Compressed roller. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0032] In the description of the present utility model, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0033] In addition, in this application, unless otherwise clearly specified and defined, terms such as "connection", "connection", "fixation", "installation", etc. should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. It should be understood that the term "and / or" used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0036] The wheel stop mechanism, lifting platform and OHT suspended lifting system provided by the present utility model will be described in detail below with reference to specific embodiments.

[0037] Figure 1 It is a partial structural schematic diagram of the OHT suspended lifting system provided by the embodiment of the present utility model. Figure 2 It is a structural schematic diagram of the wheel stop mechanism provided by the embodiment of the present utility model in the stop state. Figure 3 It is a structural schematic diagram of the wheel stop mechanism provided by the embodiment of the present utility model in the unlocked stop state. Figure 4 It is a structural schematic diagram of the locking part of the wheel stop mechanism provided by the embodiment of the present utility model. Please refer to Figures 1 - 4, in the first aspect of the embodiment of the present utility model, a wheel stopping mechanism 1 is provided. In this embodiment, the wheel stopping mechanism 1 is described in detail in combination with the OHT suspended lifting system. The OHT suspended lifting system of this embodiment may include a ceiling mounting assembly 2 and a lifting platform 3. The lifting platform 3 has two parking tracks 31 for docking with the aerial track. The lifting platform 3 is suspended below the ceiling mounting assembly 2 in a liftable manner by a winding belt. The OHT trolley 4 can drive into or out of the lifting platform 3 along the two parking tracks 31, so as to complete track switching through the lifting platform 3, such as running online and overhauling offline. Before the OHT trolley 4 enters the OHT suspended lifting system, it can be placed in the platform track on the ground. Thus, when the docking track of the lifting platform 3 of the OHT suspended lifting system is docked with the platform track on the ground, the OHT trolley 4 can enter the lifting platform, and the OHT suspended lifting system assists the OHT trolley 4 to enter the aerial operation track.

[0038] The wheel stopping mechanism 1 of this embodiment includes a locking part 11 and an unlocking part 12. The locking part 11 and the unlocking part 12 of this embodiment are installed on the lifting platform 3 through a mounting part 13, and the mounting part 13 is fixed on the parking track 31 of the lifting platform 3. The locking part 11 is used to stop a wheel of the OHT trolley 4 during the lifting process of the OHT trolley 4, and the unlocking part 12 is used to release the stop of the locking part 11 on the wheel when the OHT trolley 4 rises to a predetermined height.

[0039] The locking part 11 of this embodiment can be configured to block on one side (i.e., the front side or the rear side) of a traveling wheel of the OHT trolley 4 in the traveling direction when in the locked state, or block both the front and rear sides of the traveling wheel in the traveling direction. The unlocking part 12 is used to release the stop of the locking part 11 on the wheel when the OHT trolley rises to a predetermined height. For example, when the unlocking part 12 touches the ceiling mounting assembly 2, under the external force applied by the ceiling mounting assembly 2, the stop of the locking part 11 on the wheel is released.

[0040] Figure 5 It is a schematic structural diagram of the locking part of the wheel stopping mechanism provided by the embodiment of the present utility model. Please refer to Figures 2 - 5, the locking part 11 includes a hinge part 111, a first connecting arm 112 located on one side of the hinge part, and a second connecting arm 113 located on the other side of the hinge part 111. The locking part 11 is hinged to the mounting part 13 through the hinge part 111, and the second connecting arm 113 is used to stop the OHT cart 4 on the internal parking track 31 of the lifting platform 3. Exemplarily, in this embodiment, the mounting part 13 includes a first mounting part 131 and a second mounting part 132. The first mounting part 131 is used to be fixed on the track of the lifting platform 3, and the locking part 11 is hinged to the second mounting part 132. The second mounting part 132 of this embodiment includes two parallel mounting plates, and the locking part 11 is hinged between the two mounting plates through a rotating shaft 133 passing through the two mounting plates and the hinge part 111. The included angle between the first connecting arm 112 and the second connecting arm 113 is an obtuse angle. The second connecting arm 113 can rotate around the rotating shaft 133 to stop the wheels and unlock the stopped wheels.

[0041] The wheel stopping mechanism 1 of this embodiment is installed on the parking track of the lifting platform 3. In order to limit the movement of the OHT cart 3 on the parking track 31, two sets of wheel stopping mechanisms 1 are installed on the parking track 31, and these two sets of wheel stopping mechanisms 1 can be arranged on the parking track 31 on one side or on the parking tracks 31 on both sides.

[0042] The wheel stopping mechanism provided by the present utility model is used for an OHT suspension lifting system. The wheel stopping mechanism includes a locking part and an unlocking part. The locking part is used to stop one wheel of the OHT cart during the lifting process of the OHT cart, and the unlocking part is used to release the stop of the locking part on the wheel when the OHT cart rises to a predetermined height. The locking part includes a first connecting arm, a hinge part, and a second connecting arm for stopping the wheel that are connected in sequence. The locking part is configured to be able to rotate around a pivot shaft passing through the hinge part so that the second connecting arm stops the wheel and unlocks the stopped wheel. The included angle between the first connecting arm and the second connecting arm is an obtuse angle. The second connecting arm of the locking part of this wheel stopping mechanism can stop the wheel, preventing the OHT cart from sliding during the lifting process. When the OHT cart rises to a predetermined height, the unlocking part can make the second connecting arm unlock the stopped wheel, reducing the process of installing a driving motor on the lifting platform to stop the wheels of the OHT cart and lowering the cost.

[0043] Figure 6 It is a schematic structural diagram of the locking part of the wheel stopping mechanism provided by the embodiment of the present utility model for stopping the wheel of the OHT cart. Figure 7 A schematic structural diagram of the locking part of the wheel stopping mechanism provided by the embodiment of the present utility model in the unlocked state. Please refer to Figures 2 - 7, the unlocking part 12 of this embodiment includes a triggering member 121 and an elastic member 122. The triggering member 121 is used to drive the first connecting arm 112 to rotate along the first direction under an external force, so as to unlock the second connecting arm 113 to block the wheel, and the elastic member 122 is used to reset the first connecting arm 112, so that the second connecting arm 113 blocks the wheel.

[0044] When the triggering member 121 of the unlocking part 12 of this embodiment is not subject to an external force, the second connecting arm 113 blocks the OHT cart 4 on the internal parking track of the lifting platform 3. When the triggering member 121 is subject to an external force, the second connecting arm 113 is switched from the blocking state to the unblocking state. For example, when the OHT suspension lifting system raises the OHT cart to a predetermined height, the triggering member 121 gradually touches the top frame plate on the ceiling mounting assembly 2. Under the action of the external force, the triggering member 121 drives the first connecting arm 112 to rotate along the first direction, and the second connecting part 113 of the locking part 11 is unlocked to block the wheel. The elastic member 122 of this embodiment is in a compressed state when the second connecting arm 113 unlocks the block of the OHT cart 4. After the external force on the triggering member 121 disappears, the external force acting on the elastic member 122 also disappears, and the elastic member 122 resets. During the reset process of the elastic member 122, the first connecting arm 112 is also pushed to reset. The specific form of the elastic member 122 in this embodiment is not particularly limited. Exemplarily, the elastic member 122 is a compression spring.

[0045] When the elastic member 122 of the wheel blocking and stopping mechanism of this embodiment is in the reset state, the second connecting arm 113 blocks the OHT cart 4 on the internal parking track 31 of the lifting platform 3, which can prevent the OHT cart 4 from sliding on the internal parking track 31 of the lifting platform 3. By applying an external force to the triggering member 121, the first connecting arm 112 can be actuated, so that the second connecting arm 113 unlocks the block of the OHT cart 4, enabling the OHT cart 4 to move freely along the parking track 31. The wheel blocking and stopping mechanism 1 does not need to be designed with a motor driving device, so the power supply line originally designed in the lifting platform 3 can be cancelled, thereby saving materials such as wiring ports, slip rings, and motors, and improving the installation efficiency. In the prior art, usually, the steel wire in the lifting belt needs to be stripped out as a wire and connected to the driving device to drive the motor to rotate. The wheel blocking and stopping mechanism 1 of this embodiment reduces the risk of material and personnel finger damage caused by wire stripping in the prior art.

[0046] Please refer to Figure 1 、 Figure 2, in a specific embodiment, the trigger 121 includes a follower seat 1211 and a contact member for applying a force to the trigger 121. The contact member is fixed on the follower seat 1211, and the height of the contact member is adjustable. In this embodiment, the follower seat 1211 is slidably mounted on the mounting portion 13, and the follower seat 1211 can slide in the vertical direction. The trigger 121 in this embodiment is triggered after contacting the ceiling or the ceiling mounting assembly 2 during the lifting process by the lifting platform 3. Since different factories have different installation environments, that is, the height between the factory ceiling or the ceiling mounting assembly 2 and the air track where the OHT cart 4 is to operate is a variable. In order to adapt to different installation environments, the height of the contact member is set to be adjustable in this application, which can be compatible with the situation where there are different heights between the ceiling or the ceiling mounting assembly 2 provided on the ceiling and the air track where the OHT cart 4 is to operate.

[0047] Preferably, please refer to Figure 2 , the contact member includes a chute rod 1212 and a connecting rod 1213. The connecting rod 1213 can slide in the chute of the chute rod 1212, and the connecting rod 1213 is detachably fixed in the chute of the chute rod 1212 so that the height of the contact member in the vertical direction is adjustable. In this embodiment, the lower part of the connecting rod 1213 is locked on the chute rod 1212 by a setscrew, and the upper part of the connecting rod 1213 is tightly fixed on the chute rod 1212 by a pressing piece. The contact member in this embodiment realizes a simple implementation method through the detachable cooperation form of the chute rod 1212 and the connecting rod 1213.

[0048] Figure 8 is a schematic structural view of the wheel stopping mechanism provided by the embodiment of the present invention from a perspective, Figure 9 is Figure 8 the schematic cross-sectional structure view of A-A in Figure 2 、 Figures 8 - 9, the first connecting arm 112 is hingedly connected to the follower seat 1211, and the elastic member 122 is a compression spring. The first connecting arm 112 of this embodiment is hingedly connected to the follower seat 1211, so that the first connecting arm 112 can be linked with the follower seat 1211. When the follower seat 1211 descends in the vertical direction, the first connecting arm 112 moves downward in linkage, the second connecting arm 113 rotates around the rotating shaft 133, and the second connecting arm 112 unlocks the stopper for the OHT trolley. The elastic member 122 of this embodiment is a compression spring, which plays a buffering role when the follower seat 1211 descends in the vertical direction. After the external force is removed. The compression spring resets. During the compression spring reset process, the elastic force pushes the follower seat 1211 to rise, the follower seat 1211 drives the first connecting arm 112 to rise, the second connecting arm 113 rotates around the rotating shaft 133, and the second connecting arm 113 stops the OHT trolley 4 on the parking track 31 inside the lifting platform 3. The follower seat 1211 of this embodiment has a notch for avoiding the first connecting arm 112 , and the first connecting arm 112 has a hinge portion for hinged connection with the follower seat 1211 .

[0049] Preferably, see Figure 2 , Figure 6 , a vertical slide rail 134 is provided on the mounting portion 13, a slider 1214 cooperating with the slide rail 134 is installed on the follower seat 1211, and a stopper 135 of the slider 1214 is provided on the mounting portion 13. In this embodiment, the vertical slide rail 134 is provided on the mounting portion 13, and the slider 1214 cooperating with the slide rail 134 is provided on the follower seat 1211, so that the follower seat 1211 can stably move up and down in the vertical direction. A stopper 135 of the slider 1214 is provided on the mounting portion 13 of this embodiment. When the slider 1214 abuts against the stopper 135, the second connecting arm 113 is parallel to the parking track 31 inside the lifting platform 3, and the second connecting arm 113 stops the OHT trolley 4 on the parking track 31 inside the lifting platform 3.

[0050] For further information, see Figure 2 The follower seat 1211 is provided with a handle 1215 for manually unlocking the locking portion. In this embodiment, the follower seat 1211 is provided with a handle 1215, so that the staff can operate the follower seat 1211 to manually unlock the locking portion.

[0051] See also Figure 2 Furthermore, a pressure roller 1216 is provided at one end of the connecting rod 1213 away from the slide slot rod 1212. In this embodiment, by providing the pressure roller 1216 at one end of the connecting rod 1213 away from the slide slot rod 1212, the contact piece contacts the ceiling or the lifting and lifting assembly provided on the ceiling more smoothly, and the contact piece leaves the ceiling or the lifting and lifting assembly on the ceiling more smoothly.

[0052] Figure 10Top view of the locking part of the wheel stopping mechanism provided by the embodiment of the utility model in the stopping state. Please refer to Figure 2 , Figure 6 , Figure 10 , preferably, a buffer block 114 is installed at the end of the second connecting arm 113; an extension arm 115 extending towards the inner side of the parking track of the lifting platform is installed at the end of the second connecting arm 113, the buffer block 114 is fixed on the extension arm 115, and a reinforcing member 116 fixedly connected to the second connecting arm 113 is arranged on the extension arm 115. In this embodiment, by arranging the buffer block 114 at the end of the second connecting arm 113, the direct impact of the wheels on the second connecting arm 113 can be reduced when the wheels of the OHT cart 4 contact the second connecting arm 113. The service life of the entire wheel stopping mechanism 1 is prolonged. The wheel stopping mechanism of this embodiment is installed on the inner parking track 31 of the lifting platform 3. In order not to affect the passage of the OHT cart 4 on the parking track 31, the installation part 13 of this embodiment is located outside the parking track 31, and the buffer block 114 at the end of the second connecting arm 113 extends into the parking track 31 when stopping the OHT cart 4 on the parking track 31. In order to better ensure that the buffer block 114 stops the wheels of the OHT cart 4, an extension arm 115 extending towards the inner side of the parking track of the lifting platform is installed at the end of the second connecting arm 113. In order to avoid damage to the extension arm 115 due to the impact of the wheels of the OHT cart 4 during the stopping process, a reinforcing member 116 is designed in this embodiment to improve the bearing capacity of the extension arm 115.

[0053] In the above embodiment, the unlocking part further includes a guiding structure. The guiding structure includes a guide post and a bushing seat. The bushing seat includes a body, and a receiving hole is formed on the body. The body is fixed on the follower seat 1211. One end of the guide post is fixed on the installation part 13, and the other end of the guide post extends out of the receiving hole. The elastic member 122 is a compression spring, and the compression spring is sleeved on the guide post. In this embodiment, by arranging the guide sleeve and the guide post, guiding is carried out during the ascending and descending processes of the follower seat 1211, so that the follower seat 1211 moves in the vertical direction. The elastic member 122 of this embodiment is sleeved on the guide post, and the elastic member 122 plays a buffering role during the downward movement of the follower seat 1211.

[0054] The following is the operation process when the wheel stopping mechanism of this embodiment is applied to the OHT suspension lifting system when the OHT cart descends:

[0055] S101. Control the winding belt to drive the lifting platform 3 to rise;

[0056] S102. The lifting platform 3 drives the wheel blocking mechanism 1 to rise. The pressure rollers 1216 of the wheel blocking mechanism 1 gradually touch the top frame plate on the ceiling mounting assembly 2. The pressure rollers 1216 are gradually subjected to the pressure of the frame plate, and the second connecting arm 113 of the locking portion 11 gradually lifts. When the follower seat 1211 hits the bottom surface of the mounting portion 13, the second connecting arm 113 is perpendicular to the floor. At this time, the OHT cart 4 can enter the lifting platform 3;

[0057] S103. The system controls the winding belt to drive the lifting platform 3 to descend;

[0058] S104. The lifting platform 3 drives the wheel blocking mechanism 1 to descend. The pressure rollers 1216 of the wheel blocking mechanism 1 gradually leave the top frame plate, and the pressure on the pressure rollers 1216 from the frame plate gradually disappears. At this time, the follower seat 1211 rises gradually under the elastic force of the compression spring. At this time, the second connecting arm 113 of the locking portion 11 gradually falls until the slider 1214 hits the limit block 135 and the second connecting arm 113 is parallel to the ground. At this time, the buffer block on the second connecting arm 113 abuts against the wheel of the OHT cart 4 to prevent the wheel from sliding.

[0059] S105. When the lifting platform 3 descends to the in-place position, manually grasp the handle 1215 and apply a pressure to the follower seat 1211 to make the second connecting arm 113 of the locking portion 11 lift and be perpendicular to the ground. At this time, the OHT cart 4 can leave under the lifting platform 3. The operator releases the handle 1215, and the follower seat 1211 rises under the elastic force of the compression spring. The second connecting arm 113 of the locking portion 11 falls accordingly until the slider 1214 hits the limit block 135 and the second connecting arm 113 of the locking portion 11 maintains a horizontal state. The lifting platform 3 rises to receive the next OHT cart 4 to descend.

[0060] The wheel blocking mechanism of the embodiment of the present utility model is used for the OHT suspended lifting system. The wheel blocking mechanism includes a locking portion and an unlocking portion. The locking portion is used to block a wheel of the OHT cart during the lifting and lowering process of the OHT cart. The unlocking portion is used to release the blocking of the wheel by the locking portion when the OHT cart rises to a predetermined height. The locking portion includes a first connecting arm, a hinge portion, and a second connecting arm for blocking the wheel, which are connected in sequence. The locking portion is configured to be rotatable about a pivot shaft passing through the hinge portion so that the second connecting arm blocks the wheel and releases the blocking of the wheel. The included angle between the first connecting arm and the second connecting arm is an obtuse angle. The second connecting arm of the locking portion of the wheel blocking mechanism can block the wheel, preventing the OHT cart from sliding during the lifting and lowering process. When the OHT cart rises to a predetermined height, the unlocking portion can make the second connecting arm release the blocking of the wheel, reducing the process of installing a driving motor on the lifting platform to block the wheels of the OHT cart and lowering the cost.

[0061] The second aspect of the embodiment of the present utility model provides a lifting platform, which includes a parking track for an OHT cart, and a wheel blocking mechanism as described in the above embodiment is arranged on the parking track.

[0062] For example: the wheel blocking mechanism includes a locking part and an unlocking part. The locking part is used to block a wheel of the OHT cart during the lifting process of the OHT cart, and the unlocking part is used to release the blocking of the wheel by the locking part when the OHT cart rises to a predetermined height;

[0063] The locking part includes a first connecting arm, a hinge part and a second connecting arm for blocking the wheel, which are connected in sequence. The locking part is configured to be able to rotate around a pivot shaft passing through the hinge part, and the included angle between the first connecting arm and the second connecting arm is an obtuse angle.

[0064] The lifting platform provided by the embodiment of the present utility model includes a wheel blocking mechanism. The second connecting arm of the locking part of the wheel blocking mechanism can block the wheel, preventing the OHT cart from sliding during the lifting process. When the OHT cart rises to a predetermined height, the unlocking part can make the second connecting arm unlock and block the wheel, reducing the process of installing a driving motor on the lifting platform to block the wheels of the OHT cart and reducing the cost.

[0065] The third aspect of the embodiment of the present utility model provides an OHT suspended lifting system, which includes a lifting platform, and the lifting platform is the lifting platform as described in the above embodiment.

[0066] The lifting platform of the OHT suspended lifting system in the embodiment of the present utility model includes a wheel blocking mechanism. The second connecting arm of the locking part of the wheel blocking mechanism can block the wheel, preventing the OHT cart from sliding during the lifting process. When the OHT cart rises to a predetermined height, the unlocking part can make the second connecting arm unlock and block the wheel, reducing the process of installing a driving motor on the lifting platform to block the wheels of the OHT cart and reducing the cost.

[0067] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A wheel stop mechanism for an OHT suspension lifting system, characterized in that: The wheel stopping mechanism includes a locking part and an unlocking part, wherein the locking part is used to stop a wheel of the OHT trolley during the lifting process of the OHT trolley, and the unlocking part is used to release the locking part from stopping the wheel when the OHT trolley is raised to a predetermined height; The locking portion includes a first connecting arm, a hinged portion, and a second connecting arm for stopping the wheel, which are connected in sequence. The locking portion is configured to be rotatable around a pivot passing through the hinged portion, and the angle between the first connecting arm and the second connecting arm is an obtuse angle.

2. The wheel stopping mechanism according to claim 1, characterized in that: It also includes a mounting portion, which is used to fix the wheel stopping mechanism to the parking track.

3. The wheel stopping mechanism according to claim 2, characterized in that: The unlocking portion includes a trigger member and an elastic member. The trigger member is used to drive the first connecting arm to rotate along a first direction under the action of an external force, and the elastic member is used to reset the first connecting arm.

4. The wheel stopping mechanism according to claim 3, characterized in that: The trigger member comprises a contact member and a follower seat, wherein the contact member is used to apply a force to the trigger member and the height of the contact member is adjustable, and the follower seat is hingedly connected to the first connecting arm.

5. The wheel stopping mechanism according to claim 4, characterized in that: The contact member comprises a sliding groove rod and a connecting rod. The connecting rod can slide in a sliding groove of the sliding groove rod. The sliding groove rod and the connecting rod are detachably connected via a fixing member.

6. The wheel stopping mechanism according to claim 5, characterized in that: A pressure roller is arranged at one end of the connecting rod away from the sliding slot rod.

7. The wheel stopping mechanism according to claim 4, characterized in that: The follower seat is provided with a handle for manually unlocking the locking portion.

8. The wheel stopping mechanism according to claim 4, characterized in that: The mounting portion is provided with a slide rail, the follower seat is provided with a slide block matched with the slide rail, and the mounting portion is provided with a limit block of the slide block.

9. A lifting platform, characterized in that: It comprises a parking track of an OHT trolley, on which the wheel stopping mechanism according to any one of claims 1 to 8 is arranged.

10. An OHT suspension lifting system, characterized in that: It comprises a lifting platform, and the lifting platform is the lifting platform according to claim 9.

Images