A pull basket load regulation elevator misoperation protection mechanism and a pull basket load regulation elevator

Abstract

This invention discloses a misoperation protection mechanism for a pull-out basket load-adjusting lift and the pull-out basket load-adjusting lift itself, belonging to the field of pull-out basket lifts. The misoperation protection mechanism of this invention includes a load-adjusting force-applying mechanism and a load-adjusting operation mechanism. The load-adjusting force-applying mechanism achieves switching between light-load tension and heavy-load force-applying states through the separation or engagement of a clutch block and a rotating block. The load-adjusting operation mechanism and the clutch block employ a self-closing engagement structure, and a swing block is used to restrict gear operation in the light-load tension state, preventing misoperation. Simultaneously, in the event of misoperation in the heavy-load force-applying state, the clutch block automatically switches to the current light-load gear during the lift's retraction process, ensuring the correspondence between the operating gear and the actual load-adjusting tension state, and improving the reliability and stability of the pull-out basket lift. Furthermore, compared to existing designs, the clutch block and rotating block will not come into contact and rub due to misoperation, making gear switching easier and more reliable.

Description

Technical Field

[0001] This invention relates to a basket lift, and more specifically, to a malfunction protection mechanism for a basket load adjustment lift and the basket load adjustment lift itself. Background Technology

[0002] To make the most of indoor space, wall-mounted cabinets or tall cabinets are commonly used for storage. However, due to their height, they are often inconvenient to access when taking items out, causing some inconvenience for users. To address this issue, pull-out baskets have emerged as an ideal solution to the storage problems of wall-mounted and tall cabinets. Thanks to their practicality and convenience, pull-out baskets have become one of the most important space-saving products in modern homes and are widely favored by consumers.

[0003] The core mechanism of a pull-out basket is the lifting mechanism. The basket body typically consists of two sets of lifting mechanisms installed inside the cabinet, one on the left and one on the right. The lifting mechanism's linkage allows the basket body to swing and rise along an arc-shaped trajectory within the cabinet. In actual use, the user simply pulls down the handle, and the basket body swings downwards and extends along an arc path before naturally falling back down, making it easy to retrieve or store items. After retrieving or placing items, pushing the handle upwards causes the basket body to swing upwards along the arc trajectory and automatically retract back into the cabinet, restoring a neat and orderly appearance. The operating mechanism of the pull-out basket lifting mechanism usually relies on the coordinated action of a buffer and springs to achieve a smooth and cushioned lifting process. However, in actual use, there is a significant correlation between the movement of the pull-out basket and the weight of its contents. This correlation directly affects the basket's stability. For example, under light loads, the force required to pull out the basket is considerable, and due to insufficient gravity, the basket often struggles to maintain its descending position, requiring manual force from the user to secure it. Simultaneously, when the basket retracts, excessive rebound force can reduce its cushioning performance, leading to more severe shaking and affecting stability. Conversely, under heavy loads, the lift's pulling force may be insufficient to balance the basket's weight, causing it to descend rapidly with noticeable shaking during extension. Furthermore, retracting the basket requires greater force to overcome gravity and frictional resistance, increasing operational difficulty.

[0004] Therefore, most existing pull-out basket lifts are equipped with load adjustment functions, which can adjust the lifting force according to the weight of the items loaded in the basket, thereby improving the stability of the basket's lifting and lowering movement. Currently, the load adjustment mechanisms of pull-out basket lifts mainly include several methods such as force-adding spring hook mounting, force-adding spring chain mounting, and force-adding spring locking plate clutch mounting. Among them, the force-adding spring hook mounting design can refer to the "A Lifting Buffer Shelf" disclosed in Chinese Patent Publication No. CN209595601U, the "A Hanging Cabinet Arc-Shaped Lifting Basket with Bearing Connecting Rod" disclosed in Chinese Patent Publication No. CN221307658U, and the "A Lifting Basket Adjustment Device" disclosed in Chinese Patent Publication No. CN119949623A, etc. These mainly control one end of the force-adding spring to engage in the lifting and lowering movement of the basket through a force-adding button or knob mechanism. For the force-adding spring chain mounting design, refer to the "Damping Lifting Device, Lifting Basket and Hanging Cabinet" disclosed in Chinese Patent Publication No. CN213757328U, the "A Lifting Basket That Can Reduce Hand-Hand Travel" disclosed in Chinese Patent Publication No. CN116350012A, and the "A Manual Lifting Basket with Multiple Power Storage Mechanism that Can Switch Between Empty and Heavy Load Modes" disclosed in Chinese Patent Publication No. CN119732562A. These designs mainly connect the force-adding spring to the chain, and the force-adding spring participates in the control by locking or releasing the chain through a switch. For the force-adding spring locking plate clutch mounting design, refer to the "A Double-Layer Linked Lifting Basket for Hanging Cabinets" disclosed in Chinese Patent Publication No. CN120093096A. This design achieves the participation of the force-adding spring by controlling the engagement or disengagement of the clutch block and the rotating block.

[0005] However, the first two types of load adjustment mechanisms are relatively complex in structure and difficult to manufacture, especially lacking protection against misoperation. Since the user cannot visually observe whether the force-applying spring is engaged, accidental operation without clearly checking the gear position can easily cause damage to the entire or partial transmission system. While the third type of load adjustment mechanism has a simpler structure and some protective mechanisms, this design has the following main problems:

[0006] ① After the basket is lowered, the toggle block can be operated. For ordinary users, it is difficult to determine the gear position of the basket lift by the position of the toggle block, which increases the uncertainty of the operation status and is likely to cause confusion in the user's operation.

[0007] ②The clutch block always tends to engage with the rotating block. If the actuation block is accidentally touched after the basket descends, the clutch block will contact and press against the arc surface of the rotating block, increasing the resistance and noise when the basket rises. It will also cause wear on the clutch block and the rotating block. After long-term use, there is a risk of reduced engagement stability between the two.

[0008] ③ The engagement of the clutch block and the rotating block is entirely achieved by the elastic force of the torsion spring. To ensure the stability of the engagement, the pre-compression of the torsion spring needs to be increased. After long-term use, the torsion spring is prone to fatigue. Once the torsion spring fails due to fatigue, there is a risk of failure of the load adjustment function.

[0009] Furthermore, pull-out basket lifts typically incorporate limit and buffer functions at the descent and retraction positions. Currently, a common limit and buffer function involves setting limit posts on the connecting rod, creating an arc-shaped perforation on the lift housing, and placing elastic buffer components at both ends of the arc-shaped perforation. During descent and retraction, the limit posts cooperate with the corresponding elastic buffer components to achieve buffering and limiting. However, this limit and buffer structure requires the arc-shaped perforation to have the same stroke as the connecting rod's lifting rotation, resulting in a large space occupation within the pull-out basket lift and a relatively large overall size, which is detrimental to its miniaturization and compact design. Summary of the Invention

[0010] 1. The technical problem that the invention aims to solve

[0011] The purpose of this invention is to overcome the aforementioned shortcomings of existing load adjustment mechanisms in pull-out basket lifts, and to provide a misoperation protection mechanism and a pull-out basket load adjustment lift itself. Using the technical solution of this invention, the load adjustment mechanism switches between light-load and heavy-load states by separating or engaging a clutch block and a rotating block. The load adjustment operation mechanism and the clutch block use a self-closing engagement structure, and a swing block connected to the clutch block restricts gear operation in the light-load state, avoiding misoperation and increased uncertainty in the operating state. Simultaneously, if the load is mistakenly switched to a light-load position in the heavy-load state, the clutch block automatically switches back to the current light-load position during the lift's retraction process, ensuring the correspondence between the operating gear and the actual load adjustment state, and improving the reliability and stability of the pull-out basket lift. Furthermore, compared to existing designs, the clutch block and rotating block do not come into contact and rub due to misoperation, making gear switching easier and more reliable.

[0012] 2. Technical Solution

[0013] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0014] The present invention provides a misoperation protection mechanism for a basket-type load-adjusting elevator, comprising:

[0015] A load adjustment and force application mechanism has a rotating block and a clutch block, wherein the clutch block can be separated from or engaged with the rotating block to switch between a light load tension state and a heavy load application state.

[0016] The load adjustment mechanism has a first gear corresponding to the light load tension state and a second gear corresponding to the heavy load force state. The load adjustment mechanism switches between the first gear and the second gear to control the movement of the clutch block so that the clutch block separates from or engages with the rotating block.

[0017] The load adjustment mechanism has a locking part that can move when switching between the first gear and the second gear. The clutch block is provided with a locking groove that cooperates with the locking part. The clutch block is also connected with a swing block that can be linked with the clutch block.

[0018] When the load adjustment mechanism is in the first position, the locking part and the locking groove interlock and drive the clutch block and the rotating block to separate. At this time, the elevator is in a light load tension state. When the elevator descends, the swing block and the rotating block that rotates with the elevator descend abut against each other to restrict the load adjustment mechanism from switching from the first position to the second position.

[0019] When the load adjustment mechanism is in the second gear, the locking part drives the clutch block to engage with the rotating block and disengage from the locking groove. At this time, the elevator is in a heavy load state, and the clutch block moves with the rotating block. When the elevator descends, if the load adjustment mechanism is mistakenly switched from the second gear to the first gear, the locking groove and the locking part can re-engage when the elevator retracts, and drive the clutch block to separate from the rotating block, returning to the light load tension state corresponding to the first gear.

[0020] Furthermore, the load adjustment and force application mechanism also includes a follower disk for connecting the force application component. The follower disk is coaxial with the rotation center of the rotating block. The clutch block is connected to the follower disk through hinge point A. The swing block is rotatably mounted on the follower disk. The clutch block and the swing block are movably connected to each other and are used to drive the swing block to rotate on the follower disk when the clutch block rotates around hinge point A.

[0021] Furthermore, a first elastic element capable of oscillating motion is provided between the clutch block and the follower disk. One end of the first elastic element acts on the connection point B of the follower disk, and the other end of the first elastic element acts on the connection end C of the clutch block. During the movement of the clutch block separating from and engaging with the rotating block, the connection end C is in an intermediate state where it passes through the line connecting the hinge point A and the connection point B. The first elastic element has an elastic tendency to swing in the direction of crossing the line when the connection end C crosses the line.

[0022] Furthermore, the rotating block has an outwardly protruding hook portion, and the hook portion has a hook groove on the side facing the downward rotation direction. The clutch block has a hook tip portion that cooperates with the hook groove. When the elevator is in the retracted state, the return stroke of the rotating block is greater than the return stroke of the follower plate, so that the hook tip portion disengages from the hook groove, ensuring that the clutch block can swing and switch between light load tension state and heavy load extension state.

[0023] Furthermore, the follower plate is provided with a limiting post for limiting the return stroke stop of the rotating block, and the elevator is provided with a limiting block for limiting the return stroke stop of the follower plate.

[0024] Furthermore, the load adjustment mechanism includes an operating switch, a transmission plate, and a second elastic element. The locking part is disposed on the transmission plate, and the operating switch is connected to the transmission plate to drive the transmission plate to switch between the first gear and the second gear. The second elastic element acts on the transmission plate and has an elastic tendency to move in the overtaking direction when the operating switch passes through the intermediate switching position between the first gear and the second gear. The elastic force of the second elastic element is greater than the elastic force of the first elastic element.

[0025] When the load adjustment mechanism is mistakenly switched to the first gear under heavy load, and the elevator changes from the lowering state to the retracting state, the lower groove wall of the clutch block first contacts the locking part and drives the transmission plate to move together; when the follower plate moves to the return stroke end point, the transmission plate does not pass the intermediate conversion position from the first gear to the second gear, and after the rotating block moves to the return stroke end point, the transmission plate returns to the first gear position because the hook tip and the hook groove disengage from each other, and the locking part and the locking groove engage with each other. At this time, the load adjustment mechanism is in a light load tension state with the clutch block and the rotating block separated.

[0026] Furthermore, both the first and second elastic elements are torsion springs, and the operating switch is a push button fixedly connected to the transmission plate.

[0027] The present invention provides a basket-mounted load-adjusting elevator, including the aforementioned basket-mounted load-adjusting elevator malfunction protection mechanism; wherein,

[0028] The load adjustment and force application mechanism is located inside the mounting box. The rotating block has a rotating shaft. The rotating block is rotatably mounted in the upper mounting box via the rotating shaft, and one end of the rotating shaft extends out of the mounting box and is fixedly connected to the first connecting rod. A second connecting rod is also rotatably mounted on the mounting box. A support arm is also fixed on the rotating block. A damper is provided between the support arm and the mounting box. A light-load tension member is also provided between the rotating block and the mounting box.

[0029] The load adjustment mechanism is mounted on the mounting box. When the load adjustment mechanism is in the first position, the clutch block and the rotating block are separated, and only the light load tension component participates to form a light load tension state. When the load adjustment mechanism is in the second position, the clutch block and the rotating block are engaged, and the light load tension component and the force-adding component participate together to form a heavy load force-adding state.

[0030] Furthermore, a buffer limiting plate is rotatably mounted on the rotating shaft of the rotating block. One side of the rotating block has a limiting track groove that allows the buffer limiting plate to rotate relative to the rotating block. At both ends of the limiting track groove are retractable buffer steps and descending buffer steps that can abut against the buffer limiting plate. The mounting box is also provided with retractable buffer components and descending buffer components that cooperate with the free end of the buffer limiting plate.

[0031] During the process of the elevator moving from the retracted state to the descending state, there is a period of free travel between the rotating block and the buffer limit plate. After the rotating block passes through this free travel, it drives the buffer limit plate and the descending buffer component to form a buffer limit through the descending buffer step.

[0032] During the movement of the elevator from the lowering state to the retracting state, there is also a period of free travel between the rotating block and the buffer limit plate. After the rotating block passes through this free travel, the retracting buffer step drives the buffer limit plate and the retracting buffer to form a buffer limit.

[0033] Furthermore, a third elastic element is provided between the buffer limiting plate and the mounting box. The third elastic element has an elastic tendency to move in the overpass direction and remain in place when the buffer limiting plate passes the middle position of the movement stroke defined between the retracting buffer element and the descending buffer element.

[0034] 3. Beneficial effects

[0035] Compared with existing known technologies, the technical solution provided by this invention has the following significant advantages:

[0036] (1) A misoperation protection mechanism for a basket-type load-adjusting elevator of the present invention includes a load-adjusting force-adding mechanism and a load-adjusting operation mechanism. The load-adjusting force-adding mechanism has a rotating block and a clutch block. The clutch block can separate or engage with the rotating block to switch between a light load tension state and a heavy load force-adding state. The load-adjusting operation mechanism has a first gear corresponding to the light load tension state and a second gear corresponding to the heavy load force-adding state. The load-adjusting operation mechanism has a locking part that can move when switching between the first gear and the second gear. The clutch block is provided with a locking groove that cooperates with the locking part. The clutch block is also connected with a swing block that can be linked with the clutch block. The operating mechanism and clutch block form a self-closing engagement structure through the aforementioned locking part and locking groove. The swing block connected to the clutch block restricts gear operation under light load tension, avoiding accidental gear operation and increasing the uncertainty of the operating state. At the same time, if the gear is accidentally operated to the light load gear under heavy load tension, the clutch block can automatically switch to the current light load gear during the retraction of the elevator, ensuring the correspondence between the operating gear and the actual load tension state, and improving the reliability and stability of the basket elevator. In addition, compared with the existing design, the clutch block and the rotating block will not come into contact and rub due to accidental operation, and gear switching is easier and more reliable.

[0037] (2) The present invention provides a misoperation protection mechanism for a basket-type load adjustment elevator. The load adjustment force-adding mechanism further includes a follower disk for connecting the force-adding component. The follower disk is coaxial with the rotation center of the rotating block. The clutch block is connected to the follower disk through hinge point A. The swing block is rotatably mounted on the follower disk. The clutch block and the swing block are movably connected to each other and are used to drive the swing block to rotate on the follower disk when the clutch block rotates around hinge point A. With the above design, the clutch block and the swing block can rotate in opposite directions. After the swing block and the rotating block abut, the load adjustment operation mechanism can be locked, thereby preventing the gear from being misoperated from the mechanical structure. The structure design is simple and ingenious, and the use is safe and reliable.

[0038] (3) A misoperation protection mechanism for a basket-type load-adjusting elevator of the present invention is provided between the clutch block and the follower plate, and a first elastic element capable of oscillating motion is provided. One end of the first elastic element acts on the connection point B of the follower plate, and the other end of the first elastic element acts on the connection end C of the clutch block. During the movement of the clutch block separating and engaging with the rotating block, the connection end C has an intermediate state in which the connection end C passes through the line connecting the hinge point A and the connection point B. The first elastic element has an elastic tendency to swing in the direction of crossing the line when the connection end C crosses the line. With the above design, the clutch block has an intermediate transition state, and the first elastic element can stably constrain the clutch block in the state of separation or engagement with the rotating block, further ensuring the accuracy and reliability of gear operation.

[0039] (4) The present invention provides a misoperation protection mechanism for a pull-basket load-adjusting elevator, wherein the rotating block has a hook portion protruding outward, and the hook portion is provided with a hook groove on the side facing the downward rotation direction, and the clutch block has a hook tip portion that cooperates with the hook groove; the rotating block and the clutch block engage along the downward rotation direction, the engagement is more stable, ensuring the stable transmission of the pulling force, and there is no need to set a torsion spring with a large compression amount, avoiding the reduction of the elevator's service life due to torsion spring fatigue failure; and when the elevator is in the retracted state, the return stroke of the rotating block is greater than the return stroke of the follower plate, so that the hook tip portion and the hook groove are disengaged from each other, ensuring that the clutch block can swing and switch between light load pulling state and heavy load adding state, which is ingeniously designed and the movement is accurately coordinated.

[0040] (5) A misoperation protection mechanism for a basket-type load-adjusting elevator of the present invention is provided on the follower plate with a limiting post for limiting the return stroke stop of the rotating block, and a limiting block for limiting the return stroke stop of the follower plate is provided inside the elevator, which can effectively limit the rotating block and the follower plate, and ensure that the clutch block can reliably switch between the disengaged and engaged states smoothly with the rotating block.

[0041] (6) A misoperation protection mechanism for a basket-type load-adjusting elevator of the present invention includes an operating switch, a transmission plate, and a second elastic member. The locking part is provided on the transmission plate, and the second elastic member acts on the transmission plate and has an elastic tendency to move in the overtaking direction when the operating switch passes through the intermediate switching position between the first and second gears. In this way, the operating switch also has an intermediate transition state, and the second elastic member can be used to realize the natural transition of the operating switch switching, thereby improving the quality of gear switching operation. In addition, the elastic force of the second elastic member is greater than that of the first elastic member. When a gear misoperation occurs under heavy load, the lower groove wall of the locking groove of the clutch block can be used to drive the transmission plate to move together when the elevator changes from the lowering state to the retraction state. After the follower plate moves to the return stroke end point, the rebound effect of the transmission plate not having passed the intermediate switching position is used to pull the clutch block and the rotating block to automatically restore to the correct gear state. The structure is precisely and ingeniously designed, and the action is stable and natural, effectively avoiding damage to the elevator due to misoperation.

[0042] (7) A basket-lifting hoist of the present invention includes the above-mentioned basket-lifting hoist misoperation protection mechanism. On the one hand, it can ensure that the hoist can be stably adjusted between different tension states to adapt to the weight of the stored items in the basket; on the other hand, it can reduce the misoperation of the gear and effectively protect the hoist in case of misoperation, so as to avoid damage to the hoist due to misoperation.

[0043] (8) A pull-out basket load-adjusting elevator of the present invention has a buffer limit plate rotatably installed on the rotating shaft of the rotating block. One side of the rotating block has a limit track groove that allows the buffer limit plate to rotate relative to the rotating block. During the retraction and descent of the elevator, there is a free stroke between the rotating block and the buffer limit plate. While ensuring the large-angle rotation stroke of the rotating block, the active stroke of the buffer limit plate is effectively reduced, thereby saving the space required for buffering. This makes the overall size of the elevator more compact and small, which is conducive to the installation of the elevator in the cabinet.

[0044] (9) A basket-pulling lifting machine of the present invention is provided with a third elastic member between the buffer limit plate and the mounting box. The third elastic member has an elastic tendency to move in the overpass direction and maintain the buffer limit plate when the buffer limit plate passes the middle position of the movement stroke defined between the retracting buffer member and the descending buffer member. With the above design, the positional stability of the buffer limit plate can be guaranteed by the third elastic member, and the buffer limit plate can be prevented from swinging freely. Attached Figure Description

[0045] Figure 1 This is a three-dimensional structural diagram of a basket-lifting hoist according to the present invention;

[0046] Figure 2 This is a schematic diagram showing the disassembled structure of a basket-lifting hoist according to the present invention;

[0047] Figure 3 This is a schematic diagram of the internal structure of a basket-lifting hoist according to the present invention at one angle;

[0048] Figure 4 This is a schematic diagram of the internal structure of a basket-pulling and load-adjusting elevator according to the present invention from another angle;

[0049] Figure 5 This is a schematic diagram of the cooperation structure between the rotating block and the clutch block in a basket-loading elevator according to the present invention;

[0050] Figure 6 This is a schematic diagram of the rotating block in a basket-loading elevator according to the present invention;

[0051] Figure 7 This is a schematic diagram of the installation structure of the clutch block in a basket-type load-adjusting elevator according to the present invention;

[0052] Figure 8 This is a schematic diagram of the retracted state of a basket-pulling lifting machine of the present invention in the light load position;

[0053] Figure 9 This is a schematic diagram of the lowering state of the basket-pulling lifting machine of the present invention in the light load gear;

[0054] Figure 10 for Figure 9 A magnified schematic diagram of the local structure at point K;

[0055] Figure 11 This is a schematic diagram of the retracted state of a basket-lifting hoist of the present invention in the heavy-load boosting gear position;

[0056] Figure 12 This is a schematic diagram of the intermediate descent state of a basket-lifting hoist of the present invention in the heavy-load booster gear;

[0057] Figure 13 This is a schematic diagram of the completed descent state of a basket-lifting hoist of the present invention in the heavy-load boost mode;

[0058] Figure 14 This is a schematic diagram of the first state of the retraction process of a basket-lifting hoist of the present invention after it is in a heavy load and the gear is mistakenly operated.

[0059] Figure 15 This is a schematic diagram of the second state of the retraction process of a basket-lifting hoist of the present invention after it is in a heavy load and the gear is mistakenly operated.

[0060] Figure 16 This is a schematic diagram of the third state of the retraction process of a basket-lifting hoist of the present invention after it is in a heavy-load, force-applying state and the gear position is mistakenly operated.

[0061] Explanation of the labels in the diagram:

[0062] 1. Load adjustment and force application mechanism; 1-1. Rotating block; 1-1-1. Hook part; 1-1-2. Hook groove; 1-1-3. Rotating shaft; 1-1-4. Limiting track groove; 1-1-4a. Retraction buffer step; 1-1-4b. Descending buffer step; 1-2. Clutch block; 1-2-1. Snap-fit ​​groove; 1-2-2. Hook tip; 1-2-3. First limiting waist hole; 1-2-4. Connecting column; 1-3. Swing block ; 1-3-1, Movable hole; 1-4, Force-applying component; 1-5, Follower plate; 1-5-1, Limiting post; 1-6, First elastic element; 1-7, Limiting block; 1-8, Support arm; 1-9, Damper; 1-10, Light load tension component; 1-11, Buffer limiting plate; 1-11-1, Second limiting waist hole; 1-12, Third elastic element; 1-13, Connecting bolt; 1-14, Bearing seat; S1, Connecting wire;

[0063] 2. Load adjustment mechanism; P1, first gear; P2, second gear; 2-1, locking part; 2-2, operating switch; 2-3, transmission plate; 2-3-1, guide hole; 2-4, second elastic element;

[0064] 3. Installation box; 3-1. Retractable buffer; 3-2. Lowering buffer; 3-3. Box body; 3-4. Cover plate; 3-5. Reinforcing bracket; 3-6. Upper limit post; 3-7. Lower limit post; 4. First connecting rod; 5. Second connecting rod. Detailed Implementation

[0065] This invention relates to a misoperation protection mechanism for a basket-type load-adjusting elevator and the basket-type load-adjusting elevator itself, involving various states of the elevator, such as light load pulling state and heavy load adding state, gear position state, and the lowering and retraction states of the elevator. For ease of understanding, the meanings of the above-mentioned various states are explained below:

[0066] Light load tension state: This state is when the force-adding components inside the elevator are not engaged in operation. This applies to situations where the basket is unloaded and lightly loaded.

[0067] Heavy-load booster mode: In this mode, the booster components inside the elevator participate in the work, providing a greater pulling force. This mode is suitable for situations where the basket is heavily loaded.

[0068] Gear position: Includes first gear P1 and second gear P2. Under normal circumstances, first gear P1 corresponds to the light load tension state described above, which is the no-load / light load gear; second gear P2 corresponds to the heavy load acceleration state described above, which is the heavy load gear; first gear P1 and second gear P2 can be switched between each other; it should be noted that... Figure 8 , Figure 9 , Figures 11 to 14 as well as Figure 16 In the diagram, the "arrow" between the first gear P1 and the second gear P2 both represent the current gear position. That is, if the "arrow" points to P1, it means that the operating switch is in the first gear P1 position. Figure 15 The arrows between first gear P1 and second gear P2, as well as arrows in other positions, all indicate the direction of movement, for example... Figure 15 The "arrow" between the first gear P1 and the second gear P2 represents the passive movement of the operating switch from the first gear P1 to the second gear P2;

[0069] The lowering and retraction states of the elevator: This state corresponds to the position of the pull-out basket relative to the cabinet. The elevator is in the "lowering state" after the pull-out basket swings down from the cabinet, and in the "retraction state" when the pull-out basket retracts into the cabinet. In the retraction state, the first gear P1 and the second gear P2 can be switched to switch the elevator to a light-load pulling state or a heavy-load boosting state. Misoperation of the gear state occurs in the lowering state of the elevator.

[0070] To further understand the content of this invention, it will now be described in detail with reference to the accompanying drawings and embodiments.

[0071] [Example]

[0072] like Figures 1 to 5 As shown, a malfunction protection mechanism for a basket-type load-adjusting elevator in this embodiment includes a load-adjusting force-adding mechanism 1 and a load-adjusting operation mechanism 2. The load-adjusting force-adding mechanism 1 is an actuator that switches the elevator between a light-load tension state and a heavy-load force-adding state. It has a rotating block 1-1 and a clutch block 1-2. The clutch block 1-2 can be separated from or engaged with the rotating block 1-1 to switch between the light-load tension state and the heavy-load force-adding state. When the clutch block 1-2 is separated from the rotating block 1-1, the force-adding component 1-4 does not participate in the work, and the elevator is in a light-load tension state. When the clutch block 1-2 is engaged with the rotating block 1-1, the force-adding component 1-4 participates in the work, and the elevator is in a heavy-load force-adding state. The load adjustment mechanism 2 is a mechanism for changing the gear of the elevator. It has a first gear P1 corresponding to the light load tension state and a second gear P2 corresponding to the heavy load extension state. The load adjustment mechanism 2 switches between the first gear P1 and the second gear P2 to control the movement of the clutch block 1-2 so that the clutch block 1-2 separates or engages with the rotating block 1-1, thereby realizing the conversion of the load adjustment extension mechanism 1 between the light load tension state and the heavy load extension state.

[0073] The load adjustment mechanism 2 has a locking part 2-1 that moves when switching between the first gear P1 and the second gear P2. The clutch block 1-2 has a locking groove 1-2-1 that engages with the locking part 2-1. A swing block 1-3 that moves in conjunction with the clutch block 1-2 is also connected to the clutch block 1-2. When the load adjustment mechanism 2 is in the first gear P1, the locking part 2-1 and the locking groove 1-2-1 interlock and cause the clutch block 1-2 to separate from the rotating block 1-1, at which point the elevator is in a light-load tension state. When the elevator descends, the swing block 1-3 engages with the rotating block 1-1, which rotates as the elevator descends, to restrict the load adjustment mechanism 2 from switching from the first gear P1 to the second gear P2. That is, in the light-load descent state of the elevator, the load adjustment mechanism 2 is not allowed to switch gears, thus preventing accidental gear operation in this state and avoiding the clutch block 1-2 moving towards the rotating block 1-1 and affecting the reset movement of the rotating block 1-1. When the load adjustment mechanism 2 is in the second gear P2, the locking part 2-1 drives the clutch block 1-2 to engage with the rotating block 1-1 and disengage from the locking groove 1-2-1. At this time, the elevator is in a heavy-load state, and the clutch block 1-2 moves together with the rotating block 1-1. When the elevator descends, if the load adjustment mechanism 2 is mistakenly switched from the second gear P2 to the first gear P1, when the elevator retracts, the locking groove 1-2-1 and the locking part 2-1 can re-engage, driving the clutch block 1-2 to separate from the rotating block 1-1, returning to the first gear P1. In the corresponding light load tension state, that is, when the elevator is in the descending state, the clutch block 1-2 disengages from the locking part 2-1 and rotates with the rotating block 1-1. At this time, the load adjustment mechanism 2 can switch between the first gear P1 and the second gear P2. If the gear is mistakenly switched to the first gear P1, during the reset process of the clutch block 1-2, its locking groove 1-2-1 can re-engage with the locking part 2-1, thereby driving the clutch block 1-2 to switch to the state of being separated from the rotating block 1-1, so that the elevator returns to the light load tension state corresponding to the first gear P1.

[0074] With the above design, the load adjustment and force application mechanism 1 switches between light load tension and heavy load application states by separating or engaging the clutch block 1-2 and the rotating block 1-1. The load adjustment operation mechanism 2 and the clutch block 1-2 are coupled with a self-closing engagement structure, and the swing block 1-3 connected to the clutch block 1-2 is used to restrict the gear operation in the light load tension state, avoiding the uncertainty of the operation state due to misoperation of the gear. At the same time, if the gear is mistakenly operated to the light load gear in the heavy load application state, the clutch block 1-2 can be automatically switched back to the current light load gear during the retraction of the elevator, ensuring the correspondence between the operating gear and the actual load adjustment and tension state, and improving the reliability and stability of the basket elevator. In addition, compared with the existing design, the clutch block 1-2 and the rotating block 1-1 will not come into contact and rub due to misoperation, and the gear switching is easier and more reliable.

[0075] like Figures 2 to 5 As shown, in this embodiment, the load adjustment and force application mechanism 1 further includes a follower disk 1-5 for connecting the force application component 1-4. The follower disk 1-5 is coaxial with the rotation center of the rotating block 1-1. The clutch block 1-2 is connected to the follower disk 1-5 through hinge point A. The swing block 1-3 is rotatably mounted on the follower disk 1-5. The clutch block 1-2 and the swing block 1-3 are movably connected and are used to drive the swing block 1-3 to rotate on the follower disk 1-5 when the clutch block 1-2 rotates around the hinge point A. Specifically, the clutch block 1-2 is provided with a first limiting waist hole 1-2-3, which is an arc shape with the hinge point A as the center. The follower plate 1-5 is provided with a column located in the first limiting waist hole 1-2-3. The column is equipped with screws for pressing the clutch block 1-2 to ensure the installation stability of the clutch block 1-2. The clutch block 1-2 is provided with a connecting column 1-2-4. The swing block 1-3 is provided with a movable hole 1-3-1 on one side. The movable hole 1-3-1 is a waist-shaped hole. The connecting column 1-2-4 is located in the movable hole 1-3-1. During the rotation of the clutch block 1-2, the connecting column 1-2-4 can drive the swing block 1-3 to move together. The above design allows the clutch block 1-2 and the swing block 1-3 to rotate in opposite directions. Under light load, the load adjustment mechanism 2 is in the first position P1, and the rotating block 1-1 is separated from the clutch block 1-2. When the basket descends, the rotating block 1-1 rotates at a certain angle, at which point the swing block 1-3 abuts against the rotating block 1-1. Therefore, in this state, the swing block 1-3 restricts the switching operation of the load adjustment mechanism 2 from the first position P1 to the second position P2, thus locking the load adjustment mechanism 2 and preventing accidental operation of the gear position from a mechanical perspective. The structural design is simple and ingenious, and its use is safe and reliable. Under heavy load, the rotating block 1-1 engages with the clutch block 1-2. When the basket descends, the rotating block 1-1 drives the clutch block 1-2 and the swing block 1-3 to rotate together, simultaneously driving the follower plate 1-5 to rotate. This allows the force-adding component 1-4, connected to the follower plate 1-5, to participate in the operation, increasing the lifting force of the elevator. The aforementioned force-applying components 1-4 are preferably tension springs.

[0076] Furthermore, referring to Figure 5As shown, a first elastic element 1-6 capable of oscillating motion is also provided between the clutch block 1-2 and the follower disk 1-5. One end of the first elastic element 1-6 acts on the connection point B of the follower disk 1-5, and the other end of the first elastic element 1-6 acts on the connection end C of the clutch block 1-2. During the movement of the clutch block 1-2 separating from and engaging with the rotating block 1-1, it has an intermediate state where the connection end C passes through the line S1 between the hinge point A and the connection point B. The first elastic element 1-6 has an elastic tendency to swing in the direction of crossing the line S1 when the connection end C crosses the line S1. In other words, the connecting end C is in an unstable state on the connecting line S1. Once the connecting end C crosses the connecting line S1, the first elastic element 1-6 will cause the connecting end C to continue moving in the crossing direction, so that the clutch block 1-2 is either engaged with the rotating block 1-1 or disengaged from the rotating block 1-1. The first elastic element 1-6 can stably constrain the clutch block 1-2 to be in a state of disengagement or engagement with the rotating block 1-1, further ensuring the accuracy and reliability of gear operation.

[0077] Further reference Figures 5 to 7 As shown, the rotating block 1-1 has an outwardly protruding hook portion 1-1-1, and the hook portion 1-1-1 has a hook groove 1-1-2 on the side facing the downward rotation direction, so that the hook portion 1-1-1 is shaped like an eagle's beak. The clutch block 1-2 has a hook tip portion 1-2-2 that cooperates with the hook groove 1-1-2. The rotating block 1-1 and the clutch block 1-2 engage in the downward rotation direction, making the engagement more stable and ensuring the stable transmission of tension. Moreover, there is no need to set a torsion spring with a large compression amount, avoiding the reduction of the service life of the elevator due to the fatigue failure of the torsion spring. Furthermore, to ensure that the clutch block 1-2 and the rotating block 1-1 can freely switch between disengaged and engaged states in the retracted state, when the elevator is in the retracted state, the return stroke of the rotating block 1-1 is greater than the return stroke of the follower plate 1-5. This allows the hook tip 1-2-2 to disengage from the hook groove 1-1-2, ensuring that the clutch block 1-2 can swing and switch between light-load tension and heavy-load application states. That is, after the follower plate 1-5 returns to its original position, the rotating block 1-1 can continue to rotate at a certain angle, so that the hook tip 1-2-2 is initially disengaged from the hook groove 1-1-2, facilitating free switching between the clutch block 1-2 and the rotating block 1-1 in the disengaged and engaged states. The design is ingenious, and the motion coordination is accurate. Specifically, as shown... Figure 5 and Figure 8 As shown, the follower disk 1-5 is provided with a limiting post 1-5-1 for limiting the return stroke stop of the rotating block 1-1 (see...). Figure 5 The elevator is equipped with limit blocks 1-7 (see) for limiting the return stroke stop of the follower discs 1-5. Figure 8It can effectively limit the rotation block 1-1 and the follower disk 1-5, ensuring that the clutch block 1-2 can reliably switch between the disengaged and engaged states with the rotation block 1-1.

[0078] like Figures 1 to 4 As shown, in this embodiment, the load adjustment mechanism 2 includes an operation switch 2-2, a transmission plate 2-3, and a second elastic element 2-4. A locking part 2-1 is disposed on the transmission plate 2-3, and the locking part 2-1 can preferably be a roller, making its engagement or disengagement with the locking groove 1-2-1 more stable and smooth. The operation switch 2-2 is connected to the transmission plate 2-3 and is used to drive the transmission plate 2-3 to switch between the first gear P1 and the second gear P2. The second elastic element 2-4 acts on the transmission plate 2-3 and has an elastic tendency to move in the direction of crossing over when the operation switch 2-2 passes through the intermediate transition position between the first gear P1 and the second gear P2. The working mechanism of the second elastic element 2-4 is the same as that of the first elastic element 1-6, so that the operation switch 2-2 also has an intermediate transition state. The second elastic element 2-4 can be used to achieve a natural transition when switching the operation switch 2-2, improving the feel of gear switching operation. Meanwhile, the elastic force of the second elastic element 2-4 is greater than that of the first elastic element 1-6. When the load adjustment mechanism 2 is mistakenly switched to the first gear P1 under heavy load, and the elevator changes from the lowering state to the retracting state, the lower groove wall of the engagement slot 1-2-1 of the clutch block 1-2 first contacts the engagement part 2-1 and drives the transmission plate 2-3 to move together; when the follower plate 1-5 moves to the return stroke stop point, the transmission plate 2-3 does not move past the first gear P1 to the second gear P2. The intermediate position is changed, and after the rotating block 1-1 moves to the return stroke end point, the hook tip 1-2-2 disengages from the hook groove 1-1-2, causing the transmission plate 2-3 to return to the first gear P1, and the locking part 2-1 engages with the locking groove 1-2-1. At this time, the load adjustment and force application mechanism 1 is in a light load tension state with the clutch block 1-2 separated from the rotating block 1-1. The structural design is precise and ingenious, and the action is stable and natural, effectively avoiding damage to the elevator due to misoperation. This action process combines... Figures 14 to 16 See below for details.

[0079] In this embodiment, the first elastic element 1-6 and the second elastic element 2-4 are both torsion springs, which have a simple structure and are easy to assemble. The operating switch 2-2 is a push button fixedly connected to the transmission plate 2-3; pushing it up or down can switch gears. Specifically, as... Figure 3 and Figure 4As shown, the transmission plate 2-3 is elongated and has strip-shaped guide holes 2-3-1. The transmission plate 2-3 is guided and installed through the guide holes 2-3-1, allowing it to move up and down as the operating switch 2-2 is pushed up and down. Multiple sets of second elastic elements 2-4 can be provided along the length of the transmission plate 2-3 to ensure the stability of its movement. Upper limit posts 3-6 and lower limit posts 3-7 are also provided at both ends of the movement stroke of the transmission plate 2-3 to precisely limit its movement position, further improving the operational stability of the operating switch 2-2.

[0080] This embodiment also relates to a basket-pulling and loading elevator. For example... Figure 1 and Figure 2 ,as well as Figures 8 to 13 As shown, the basket-mounted loading elevator includes the aforementioned basket-mounted loading elevator malfunction protection mechanism; wherein,

[0081] The load adjustment and force application mechanism 1 is located inside the mounting box 3. The rotating block 1-1 has a rotating shaft 1-1-3. The rotating block 1-1 is rotatably mounted inside the upper mounting box 3 via the rotating shaft 1-1-3, and one end of the rotating shaft 1-1-3 extends out of the mounting box 3 and is fixedly connected to the first connecting rod 4. The mounting box 3 is also rotatably provided with a second connecting rod 5. The first connecting rod 4 and the second connecting rod 5 are used to connect with the pull basket. The rotating block 1-1 is also fixed with a support arm 1-8. A damper 1-9 is provided between the support arm 1-8 and the mounting box 3. A light load tension member 1-10 is also provided between the rotating block 1-1 and the mounting box 3. The light load tension member 1-10 is also a tension spring.

[0082] The load adjustment mechanism 2 is mounted on the mounting box 3. When the load adjustment mechanism 2 is in the first position P1, the clutch block 1-2 is separated from the rotating block 1-1. At this time, only the light load tension component 1-10 participates to form a light load tension state. When the load adjustment mechanism 2 is in the second position P2, the clutch block 1-2 is engaged with the rotating block 1-1. At this time, the light load tension component 1-10 and the force-adding component 1-4 participate together to form a heavy load force-adding state.

[0083] The basket-mounted lifting platform includes the aforementioned misoperation protection mechanism. On the one hand, it can ensure stable adjustment of the lifting platform between different tension states to adapt to the weight of the stored items in the basket; on the other hand, it can reduce misoperation of gear positions and effectively protect the lifting platform in the event of misoperation, avoiding damage to the lifting platform caused by misoperation.

[0084] like Figure 2As shown, the mounting box 3 includes a box body 3-3 and a cover plate 3-4. The cover plate 3-4 is fixed to the box body 3-3 with screws. The rotating shaft 1-1-3 of the rotating block 1-1 is fixedly connected to the first connecting rod 4 with connecting bolts 1-13, so that the rotating block 1-1 can rotate together with the first connecting rod 4. A bearing seat 1-14 for supporting the rotating shaft 1-1-3 is also provided on the cover plate 3-4 to ensure the rotational stability of the rotating block 1-1 within the mounting box 3. To improve structural strength, a reinforcing bracket 3-5 is also fixedly installed inside the box body 3-3. The damper 1-9, the light-load tension member 1-10, and the force-adding member 1-4 are respectively connected to the reinforcing bracket 3-5.

[0085] Reference Figures 2 to 5 As shown, in this basket loading and unloading elevator, a buffer limiting plate 1-11 is rotatably mounted on the rotating shaft 1-1-3 of the rotating block 1-1. One side of the rotating block 1-1 has a limiting track groove 1-1-4 (e.g., allowing the buffer limiting plate 1-11 to rotate relative to the rotating block 1-1) that allows the buffer limiting plate 1-11 to rotate relative to the rotating block 1-1. Figure 6 As shown, at both ends of the limiting track groove 1-1-4, there are retractable buffer steps 1-1-4a and descending buffer steps 1-1-4b that can abut against the buffer limiting plate 1-11. The mounting box 3 is also provided with retractable buffer component 3-1 and descending buffer component 3-2 that cooperate with the free end of the buffer limiting plate 1-11. During the movement of the elevator from the retracted state to the descending state, there is a free travel between the rotating block 1-1 and the buffer limiting plate 1-11. After the rotating block 1-1 passes through this free travel, the descending buffer step 1-1-4b drives the buffer limiting plate 1-11 and the descending buffer component 3-2 to form a buffer limit. During the movement of the elevator from the descending state to the retracted state, there is also a free travel between the rotating block 1-1 and the buffer limiting plate 1-11. After the rotating block 1-1 passes through this free travel, the retractable buffer step 1-1-4a drives the buffer limiting plate 1-11 and the retractable buffer component 3-1 to form a buffer limit. With the above design, during the retraction and descent of the elevator, there is a free travel between the rotating block 1-1 and the buffer limit plate 1-11. While ensuring the large-angle rotation travel of the rotating block 1-1, the active travel of the buffer limit plate 1-11 is effectively reduced, thereby saving the space required for buffering. This makes the overall size of the elevator more compact and small, which is conducive to the installation of the elevator in the cabinet.

[0086] In this embodiment, the buffer limiting plate 1-11 is rotatably mounted on the rotating shaft 1-1-3 of the rotating block 1-1. A second limiting hole 1-11-1 is also provided on the buffer limiting plate 1-11. This second limiting hole 1-11-1 is arc-shaped with the rotating shaft 1-1-3 as its center. A column located within the second limiting hole 1-11-1 is provided inside the mounting box 3. The column is also provided with screws for pressing down on the buffer limiting plate 1-11 to ensure the installation stability of the buffer limiting plate 1-11. Furthermore, a third elastic member 1-12 is provided between the buffer limiting plate 1-11 and the mounting box 3. The third elastic member 1-12 has an elastic tendency to move and maintain the buffer limiting plate 1-11 in the overtaking direction when it passes the midpoint of the movement stroke defined between the retracting buffer member 3-1 and the descending buffer member 3-2. The third elastic element 1-12 is preferably a torsion spring, and its working mechanism is the same as that of the first elastic element 1-6. The third elastic element 1-12 can ensure the positional stability of the buffer limiting plate 1-11 and prevent the buffer limiting plate from shaking freely.

[0087] To further understand the content of this invention, the following is now combined with Figures 8 to 16 The present invention further elaborates on the maloperation protection mechanism of the basket loading and unloading elevator and the working principle of the basket loading and unloading elevator.

[0088] Figure 8 and Figure 9 This illustrates the elevator's two motion states: retraction and descent, under light load. Figure 8 As shown, when the elevator is in the retracted state, pushing the operating switch 2-2 downwards switches to the first gear P1 (light load gear). The locking part 2-1 engages with the locking groove 1-2-1 of the clutch block 1-2, causing the clutch block 1-2 to separate from the rotating block 1-1. At this time, the connecting end C moves to the left past the line S1 connecting the hinge point A and the connecting end B. Therefore, under the action of the first elastic element 1-6, the clutch block 1-2 can be kept away from the rotating block 1-1. At the same time, the connecting post 1-2-4 of the clutch block 1-2 pushes the swing block 1-3 to swing clockwise. Simultaneously, the retraction buffer step 1-1-4a of the rotating block 1-1 pushes the buffer limit plate 1-11 to abut against the retraction buffer 3-1. When the elevator is in the retracted state... Figure 8 The recovery state to Figure 9 When the elevator transitions to its descent state, the first connecting rod 4 drives the rotating block 1-1 to rotate counterclockwise. At this time, the light-load tension component 1-10 stretches and stores energy, while the damper 1-9 contracts to provide damping. After the rotating block 1-1 rotates a certain angle, its descent buffer step 1-1-4b pushes the buffer limit plate 1-11 to rotate counterclockwise and contact the descent buffer component 3-2 for buffering. When the elevator is fully transformed... Figure 9In the lowering state shown, the hook portion 1-1-1 of the rotating block 1-1 is opposite to the position of the swing block 1-3. For example... Figure 10 As shown, in this state, if the operating switch 2-2 is pushed upward, the locking part 2-1 pushes the clutch block 1-2 so that it tends to rotate clockwise around the hinge point A. At the same time, the clutch block 1-2 drives the swing block 1-3 so that it tends to rotate counterclockwise around the rotational connection axis. This causes the swing block 1-3 to abut against the outer surface of the hook part 1-1-1, thereby preventing the operating switch 2-2 from being pushed upward to switch to the second position P2, thus avoiding the possibility of misoperation.

[0089] Figure 11 , Figure 12 and Figure 13 The diagram illustrates three motion states of the elevator under heavy load and applied force: retraction, descent, and full descent. Figure 11 As shown, when the elevator is in the retracted state, at this time... Figure 8 When the operating switch 2-2 is pushed upwards to the second position P2 (heavy load position), the upward movement of the locking part 2-1 causes the clutch block 1-2 to rotate clockwise around the hinge point A, aligning the hook tip 1-2-2 of the clutch block 1-2 with the hook groove 1-1-2 of the rotating block 1-1. Simultaneously, because the connecting end C crosses the line S1 connecting the hinge point A and the connecting end B to the right, the clutch block 1-2 remains close to the rotating block 1-1 under the action of the first elastic element 1-6. Figure 12 As shown, when the basket is pulled down, the first connecting rod 4 drives the rotating block 1-1 to rotate counterclockwise. At this time, the light-load tension member 1-10 stretches and stores energy, and the damper 1-9 contracts to provide damping. Simultaneously, the rotating block 1-1 engages with the clutch block 1-2, causing the follower plate 1-5 to rotate together, thereby making the force-adding member 1-4 participate in stretching and storing energy; Figure 12 As shown, when the rotating block 1-1 rotates a certain angle, its descending buffer step 1-1-4b contacts the buffer limit plate 1-11, causing it to rotate counterclockwise together. Figure 13 As shown, continue pulling down the basket. At this time, the buffer limit plate 1-11 rotates and collides with the descending buffer 3-2 for buffering.

[0090] Figures 14 to 16 This illustrates the reset process for a misoperation when the elevator is in a heavily loaded descent state. For example... Figure 13 As shown, after the basket is lowered, the operating switch 2-2 is allowed to be switched downwards to the first position P1 (light load position), which is an incorrect operation. Figure 14 As shown, when the basket retracts upwards, the rotating block 1-1 and the follower disk 1-5 rotate clockwise under the combined action of the force-applying component 1-4 and the light-load tension component 1-10. At this time, the damper 1-9 is stretched, providing a damping effect. Figure 15 As shown, during this process, because the engagement part 2-1 in the first gear P1 is positioned lower, when the clutch block 1-2 rotates with the follower plate 1-5, the lower groove wall of its engagement groove 1-2-1 first contacts the engagement part 2-1. Since the pulling force of the force-applying member 1-4 is greater at this time, the clutch block 1-2 pushes the engagement part 2-1 downwards, resulting in a slight movement of the operating switch 2-2 from the first gear P1 to the second gear P2. When the follower plate 1-5 is blocked by the limit block 1-7 and cannot continue moving, the operating switch 2-2 has not yet passed the intermediate position of the transition from the first gear P1 to the second gear P2. Therefore, under the action of the second elastic member 2-4, the operating switch 2-2 still maintains its elastic state, returning to the first gear P1. Figure 16 As shown, since the return stroke of the rotating block 1-1 is greater than that of the follower plate 1-5, the rotating block 1-1 will continue to rotate clockwise by a certain angle, so that the hook part 1-1-1 of the rotating block 1-1 is initially separated from the hook tip 1-2-2 of the clutch block 1-2; at the same time, since the elastic force of the second elastic element 2-4 on the transmission plate 2-3 is greater than the elastic force of the first elastic element 1-6 on the clutch block 1-2, the clutch block 1-2, which is freed from the restraint of the rotating block 1-1, can be brought back by the transmission plate 2-3 to the light load tension state separated from the rotating block 1-1, ensuring that the tension state of the elevator is consistent with the gear position of the operating switch 2-2.

[0091] This invention discloses a misoperation protection mechanism for a pull-out basket load-adjusting elevator and the elevator itself. The load-adjusting force-applying mechanism switches between light-load and heavy-load force-applying states through the separation or engagement of a clutch block and a rotating block. The load-adjusting operation mechanism and the clutch block employ a self-closing engagement structure, and a swing block connected to the clutch block restricts gear operation in the light-load force-applying state, preventing misoperation and increased uncertainty in the operating state. Simultaneously, if the elevator is mistakenly operated to a light-load gear in the heavy-load force-applying state, the clutch block automatically switches back to the current light-load gear during the elevator's retraction process, ensuring the correspondence between the operating gear and the actual load-adjusting force state and improving the reliability and stability of the pull-out basket lift. Furthermore, compared to existing designs, the clutch block and rotating block do not come into contact and rub due to misoperation, making gear switching easier and more reliable.

[0092] In addition, during the retraction and descent of the elevator, there is a free travel between the rotating block and the buffer limit plate. While ensuring the large-angle rotation of the rotating block, the active travel of the buffer limit plate is effectively reduced, thereby saving the space required for buffering. This makes the overall size of the elevator more compact and smaller, which is beneficial for the installation of the elevator in the cabinet.

[0093] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A misoperation protection mechanism for a basket-operated load-adjusting elevator, comprising: The load adjustment and force application mechanism (1) has a rotating block (1-1) and a clutch block (1-2), the clutch block (1-2) being able to separate or engage with the rotating block (1-1) to achieve switching between a light load tension state and a heavy load application state; The load adjustment mechanism (2) has a first gear (P1) corresponding to the light load tension state and a second gear (P2) corresponding to the heavy load force state. The load adjustment mechanism (2) switches between the first gear (P1) and the second gear (P2) to control the movement of the clutch block (1-2) so that the clutch block (1-2) is separated or engaged with the rotating block (1-1). Its features are: The load adjustment mechanism (2) has a locking part (2-1) that can move when switching between the first gear (P1) and the second gear (P2). The clutch block (1-2) is provided with a locking groove (1-2-1) that cooperates with the locking part (2-1). The clutch block (1-2) is also connected with a swing block (1-3) that can be linked with the clutch block (1-2). When the load adjustment mechanism (2) is in the first gear (P1), the locking part (2-1) and the locking groove (1-2-1) are interlocked and drive the clutch block (1-2) and the rotating block (1-1) to separate. At this time, the elevator is in a light load tension state. When the elevator descends, the swing block (1-3) and the rotating block (1-1) that rotates with the elevator descends abut against each other to restrict the load adjustment mechanism (2) from switching from the first gear (P1) to the second gear (P2). When the load adjustment mechanism (2) is in the second gear (P2), the locking part (2-1) drives the clutch block (1-2) to engage with the rotating block (1-1) and disengage from the locking groove (1-2-1). At this time, the elevator is in a heavy load state, and the clutch block (1-2) moves together with the rotating block (1-1). When the elevator descends, if the load adjustment mechanism (2) is mistakenly switched from the second gear (P2) to the first gear (P1), when the elevator retracts, the locking groove (1-2-1) and the locking part (2-1) can re-engage, and drive the clutch block (1-2) to separate from the rotating block (1-1), returning to the light load tension state corresponding to the first gear (P1).

2. The malfunction protection mechanism for the basket-loading elevator according to claim 1, characterized in that: The load adjustment and force application mechanism (1) further includes a follower disk (1-5) for connecting the force application component (1-4). The follower disk (1-5) is coaxial with the rotation center of the rotating block (1-1). The clutch block (1-2) is connected to the follower disk (1-5) through hinge point A. The swing block (1-3) is rotatably mounted on the follower disk (1-5). The clutch block (1-2) and the swing block (1-3) are movably connected to each other and are used to drive the swing block (1-3) to rotate on the follower disk (1-5) when the clutch block (1-2) rotates around the hinge point A.

3. The malfunction protection mechanism for the basket-loading elevator according to claim 2, characterized in that: A first elastic element (1-6) capable of oscillating motion is also provided between the clutch block (1-2) and the follower disk (1-5). One end of the first elastic element (1-6) acts on the connection point B of the follower disk (1-5), and the other end of the first elastic element (1-6) acts on the connection end C of the clutch block (1-2). During the movement of the clutch block (1-2) separating and engaging with the rotating block (1-1), it has an intermediate state in which the connection end C passes through the line (S1) between the hinge point A and the connection point B. The first elastic element (1-6) has an elastic tendency to swing in the direction of crossing the line (S1) when the connection end C crosses the line (S1).

4. The maloperation protection mechanism for the basket-loading elevator according to claim 3, characterized in that: The rotating block (1-1) has an outwardly protruding hook portion (1-1-1), and the hook portion (1-1-1) has a hook groove (1-1-2) on the side facing the downward rotation direction. The clutch block (1-2) has a hook tip portion (1-2-2) that cooperates with the hook groove (1-1-2). When the elevator is in the retracted state, the return stroke of the rotating block (1-1) is greater than the return stroke of the follower plate (1-5) so that the hook tip portion (1-2-2) disengages from the hook groove (1-1-2), ensuring that the clutch block (1-2) can swing and switch between light load tension state and heavy load extension state.

5. The maloperation protection mechanism for the basket-loading elevator according to claim 4, characterized in that: The follower disk (1-5) is provided with a limiting post (1-5-1) for limiting the return stroke stop of the rotating block (1-1), and the elevator is provided with a limiting block (1-7) for limiting the return stroke stop of the follower disk (1-5).

6. The maloperation protection mechanism for the basket-loading elevator according to claim 4, characterized in that: The load adjustment mechanism (2) includes an operation switch (2-2), a transmission plate (2-3), and a second elastic element (2-4). The latching part (2-1) is provided on the transmission plate (2-3). The operation switch (2-2) is connected to the transmission plate (2-3) and is used to drive the transmission plate (2-3) to switch between the first gear (P1) and the second gear (P2). The second elastic element (2-4) acts on the transmission plate (2-3) and has an elastic tendency to move in the direction of crossing when the operation switch (2-2) passes through the intermediate switching position between the first gear (P1) and the second gear (P2). The elastic force of the second elastic element (2-4) is greater than the elastic force of the first elastic element (1-6). When the load adjustment mechanism (2) is mistakenly switched to the first gear (P1) under heavy load, and the elevator changes from the lowering state to the retracting state, the lower groove wall of the engagement slot (1-2-1) of the clutch block (1-2) first contacts the engagement part (2-1) and drives the transmission plate (2-3) to move together; when the follower plate (1-5) moves to the return stroke end point, the transmission plate (2-3) does not pass the first gear (P1) to the second gear (P2). 2) The intermediate conversion position of the movement, and after the rotating block (1-1) moves to the return stroke end point, the transmission plate (2-3) is caused to return to the first gear (P1) because the hook tip (1-2-2) and the hook groove (1-1-2) disengage from each other, and the locking part (2-1) and the locking groove (1-2-1) are engaged with each other. At this time, the load adjustment and force application mechanism (1) is in a light load tension state with the clutch block (1-2) and the rotating block (1-1) separated.

7. The malfunction protection mechanism for the basket-loading elevator according to claim 6, characterized in that: The first elastic element (1-6) and the second elastic element (2-4) are both torsion springs, and the operating switch (2-2) is a push button fixedly connected to the transmission plate (2-3).

8. A basket-pulling and loading hoist, characterized in that: Includes the malfunction protection mechanism for the basket-loading elevator as described in any one of claims 1 to 7; wherein, The load adjustment and force application mechanism (1) is located inside the mounting box (3). The rotating block (1-1) has a rotating shaft (1-1-3). The rotating block (1-1) is rotatably mounted inside the upper mounting box (3) via the rotating shaft (1-1-3). One end of the rotating shaft (1-1-3) extends out of the mounting box (3) and is fixedly connected to the first connecting rod (4). The mounting box (3) is also rotatably provided with a second connecting rod (5). The rotating block (1-1) is also fixed with a support arm (1-8). A damper (1-9) is provided between the support arm (1-8) and the mounting box (3). A light load tension member (1-10) is also provided between the rotating block (1-1) and the mounting box (3). The load adjustment mechanism (2) is mounted on the mounting box (3). When the load adjustment mechanism (2) is in the first position (P1), the clutch block (1-2) is separated from the rotating block (1-1). At this time, only the light load tension member (1-10) participates to form a light load tension state. When the load adjustment mechanism (2) is in the second position (P2), the clutch block (1-2) is engaged with the rotating block (1-1). At this time, the light load tension member (1-10) and the force-adding member (1-4) participate together to form a heavy load force-adding state.

9. The basket-pulling and loading elevator according to claim 8, characterized in that: A buffer limiting plate (1-11) is also rotatably mounted on the rotating shaft (1-1-3) of the rotating block (1-1). One side of the rotating block (1-1) has a limiting track groove (1-1-4) that allows the buffer limiting plate (1-11) to rotate relative to the rotating block (1-1). At both ends of the limiting track groove (1-1-4) are retractable buffer steps (1-1-4a) and descending buffer steps (1-1-4b) that can abut against the buffer limiting plate (1-11). The mounting box (3) is also provided with retractable buffer components (3-1) and descending buffer components (3-2) that cooperate with the free end of the buffer limiting plate (1-11). During the process of the elevator moving from the retracted state to the descent state, there is a free travel between the rotating block (1-1) and the buffer limit plate (1-11). After the rotating block (1-1) passes through this free travel, it drives the buffer limit plate (1-11) and the descent buffer component (3-2) to form a buffer limit through the descent buffer step (1-1-4b). During the movement of the elevator from the lowering state to the retracting state, there is also a free travel between the rotating block (1-1) and the buffer limit plate (1-11). After the rotating block (1-1) passes through this free travel, it drives the buffer limit plate (1-11) and the retracting buffer (3-1) to form a buffer limit through the retracting buffer step (1-1-4a).

10. The basket-pulling and loading elevator according to claim 9, characterized in that: A third elastic element (1-12) is provided between the buffer limiting plate (1-11) and the mounting box (3). The third elastic element (1-12) has an elastic tendency to move in the overpass direction and remain in the middle position of the movement stroke defined between the retracting buffer (3-1) and the descending buffer (3-2) when the buffer limiting plate (1-11) passes through the middle position of the movement stroke defined between the retracting buffer (3-1) and the descending buffer (3-2).

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