Rope-discharging device for a hoist

Abstract

The present invention relates to the field of lifting equipment and discloses a rope-discharging device for a lifter, wherein the rope-discharging device is provided with a rope guide assembly, which can use an active guide wheel and a driven guide wheel to pull the rope out of the lifter, thereby preventing the rope released from the rope winding shaft from accumulating inside the lifter; at the same time, a rope tightening assembly and a first sensor are further provided. On the one hand, the rope tightening assembly can promote the tension of the rope, which is beneficial for the rope guide assembly to pull out the rope; on the other hand, when the rope guide assembly is not started or the rope guide assembly fails, resulting in the rope releasing speed of the rope winding shaft being higher than the rope discharging speed of the rope guide assembly, it can be judged whether the rope is slack in the lifter based on the detection result of the first sensor. If so, the rope winding shaft can be stopped to release the rope, thereby preventing the rope from being tangled into a ball inside the lifter.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, in particular to a rope-discharging device for a lifter. Background Art

[0002] Existing lifting equipment generally includes a motor, a rope winding shaft driven by the motor, and a rope wound around the rope winding shaft; the rope is retracted and released by rotating the rope winding shaft to achieve the lifting of people or objects;

[0003] As disclosed in Chinese patent CN113491851A, the lifter includes a rope winding shaft, a driving device for driving the rope winding shaft to rotate, a rope arranger for arranging the ropes on the rope winding shaft in an orderly manner, and a rope tightener for pulling out the descending rope in a zero-gravity state; the rope tightener includes a driving shaft and a driven shaft, the driving shaft is provided with a driving pulley, the driven shaft is provided with a driven pulley, the driving pulley and the driven pulley are respectively located on both sides of the rope to clamp the rope; the driving shaft is connected to the motor transmission, and the driving shaft or the driven shaft is connected to a buffer spring, and the buffer spring causes the driving pulley or the driven pulley to press against the rope.

[0004] Although the active and driven pulleys can clamp the rope under the action of a buffer spring, and the motor can then drive the active pulley to rotate, thereby pulling the rope out, when the rope winding shaft rotates to release the rope, if the user forgets to activate the rope tightener or the rope tightener malfunctions, causing the rope tightener's rope release speed to be lower than the rope winding shaft's rope release speed, the rope can become tangled inside the hoist, affecting the rope arrangement. In addition, if the rope breaks during use, it can easily cause a serious accident, which urgently needs improvement. Summary of the Invention

[0005] In view of this, the present invention proposes a rope discharging device for a hoist, aiming to at least solve the problem that the rope will be tangled inside the hoist when the rope discharging speed of the rope tightener is lower than the rope releasing speed of the rope winding shaft.

[0006] The technical solution of the present invention is achieved as follows:

[0007] A rope-discharging device for a hoist, comprising:

[0008] Housing, guide rope assembly, rope tightening assembly, rope output motor and first sensor;

[0009] The housing is provided with a rope inlet end and a rope outlet end;

[0010] The guide rope assembly includes at least one driving guide wheel, at least one driven guide wheel, and a first elastic member. The driving guide wheel is rotatably arranged on the housing, and the driven guide wheel is movably arranged on the housing along a specified path. A first rope passage for the rope to pass through is formed between the outer peripheral walls of the driving guide wheel and the outer peripheral walls of the driven guide wheel. The first elastic member is used to push the driven guide wheel close to the driving guide wheel.

[0011] The rope tightening assembly is located on a side of the guide rope assembly close to the rope feed end, and the rope tightening assembly includes a guide post, a movable seat, and a second elastic member; the movable seat is slidably arranged on the guide post, and a second rope passing channel is provided on the movable seat. The movable seat is configured to move in a first direction on the guide post under the force of the taut rope, and the second elastic member is used to apply an elastic force to the movable seat to move in a second direction on the guide post, and the first direction and the second direction are two opposite directions along the length direction of the guide post;

[0012] The rope-discharging motor is in transmission connection with the driving guide wheel;

[0013] The first sensor is used to detect the position of the moving seat on the guide rod.

[0014] As a further optional solution, two positioning guide wheels are rotatably provided on the movable seat, and grooves with U-shaped cross sections are formed on the outer peripheral walls of the two positioning guide wheels, and the second rope passing channel is formed between the two positioning guide wheels.

[0015] As a further optional solution, the second elastic member is a spring sleeved on the guide post, and the second elastic member forms an extrusion fit with one side of the movable seat;

[0016] The first sensor is fixed on the housing, and the first sensor is located on a side of the movable base away from the elastic member;

[0017] A first sensed component for sensing by the first sensor is provided on a side of the movable base close to the first sensor.

[0018] As a further optional solution, a first adjusting member is connected to a side of the second elastic member away from the movable seat, and the first adjusting member is threadedly connected to the shell to achieve position adjustment of the first adjusting member along the axial direction of the second elastic member.

[0019] As a further optional solution, the invention further includes a second sensor, wherein the second sensor is fixed on the housing;

[0020] A second induction member is provided on the outer side of the driven guide wheel;

[0021] When the driven guide wheel approaches the driving guide wheel to a certain distance, the second sensor senses the second sensed component.

[0022] As a further optional solution, it further includes a third sensor, the third sensor is fixed on the housing, and the third sensor is electrically connected to the rope-discharging motor;

[0023] When the driven guide wheel is away from the driving guide wheel to a certain distance, the third sensor senses the second sensed member, and the third sensor triggers the rope-discharging motor to stop working.

[0024] As a further optional solution, it further includes a fourth sensor and a third sensed member;

[0025] The third sensed member is arranged at the end of the rope;

[0026] The fourth sensor is arranged at the rope-out end of the housing, and the fourth sensor is used to sense the third sensed component.

[0027] As a further optional solution, the first elastic member is a spring, one end of the first elastic member forms an extrusion fit with the driven guide wheel, and the other end of the first elastic member is connected to a second adjusting member; the second adjusting member is threadedly connected to the housing to achieve position adjustment of the second adjusting member along the axial direction of the first elastic member.

[0028] As a further optional solution, there are two driving guide wheels, which are defined as a first driving guide wheel and a second driving guide wheel;

[0029] There are two driven guide wheels, defined as a first driven guide wheel and a second driven guide wheel, a connecting rod is connected between the first driven guide wheel and the second driven guide wheel, the first driven guide wheel and the second driven guide wheel are rotatably connected to the two ends of the connecting rod respectively, and the middle part of the connecting rod is hinged to the housing;

[0030] The connecting line between the first driving guide wheel and the second driving guide wheel is arranged to intersect with the connecting line between the first driven guide wheel and the second driven guide wheel; the first rope passing channel is formed between the first driving guide wheel and the first driven guide wheel, and between the second driving guide wheel and the second driven guide wheel;

[0031] The second induced member is arranged on the outer side of the first driven guide wheel or the second driven guide wheel.

[0032] As a further optional solution, the guide rope assembly, rope tightening assembly and first sensor are respectively provided in multiple groups and correspond one to one, the rope output motor is provided with one, and the active guide wheels in the multiple groups of guide rope assemblies are fixedly sleeved on a transmission shaft.

[0033] Compared with the prior art, the rope-discharging device for the lifter of the present application has at least the following beneficial effects:

[0034] 1. The rope discharging device is provided with a rope guide assembly, which can use the active guide wheel and the driven guide wheel to pull the rope out of the hoist, so as to prevent the rope released from the rope winding shaft from accumulating inside the hoist;

[0035] 2. A rope tightening assembly and a first sensor are further provided. On the one hand, the rope tightening assembly can promote the tension of the rope, which is conducive to the rope guide assembly to pull out the rope; on the other hand, when the rope guide assembly is not started or the rope guide assembly fails, resulting in the rope release speed of the rope winding shaft being higher than the rope output speed of the rope guide assembly, it can be determined based on the detection result of the first sensor whether the rope is slack in the elevator. If so, the rope winding shaft can be stopped to release the rope, thereby preventing the rope from being tangled inside the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a structural diagram of a rope-discharging device applied to a lifter according to an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of an application of an embodiment of the present invention in which a rope-discharging device is arranged on a frame of a lifter;

[0038] Figure 3 This is a schematic structural diagram of a rope-discharging device according to an embodiment of the present invention;

[0039] Figure 4 1 is a schematic structural diagram of a guide rope assembly and a tightening rope assembly according to an embodiment of the present invention;

[0040] Figure 5 1 is an exploded schematic diagram of a guide rope assembly and a tightening rope assembly according to an embodiment of the present invention;

[0041] Figure 6 2 is a schematic structural diagram of a tight rope assembly according to an embodiment of the present invention;

[0042] Figure 7 2 is a schematic structural diagram of an embodiment of the present invention in which the second sensor and the third sensor are arranged outside the first driven guide wheel;

[0043] Figure 8 2 is a schematic structural diagram of an embodiment of the present invention in which the second sensor and the third sensor are arranged outside the second driven guide wheel;

[0044] Figure 9 Schematic diagram of a rope-discharging device and a rope in cooperation with each other (the rope is taut) according to an embodiment of the present invention;

[0045] Figure 10 Schematic diagram of a rope-discharging device and a rope in cooperation with each other (rope slack) according to an embodiment of the present invention;

[0046] In the figure, 100, rope winding shaft; 200, frame; 300, rope;

[0047] B0, rope-discharging device;

[0048] B1, housing; B11, rope outlet; B12, rope inlet; B13, transmission shaft;

[0049] B2, guide rope assembly; B21, driving guide wheel; B21a, first driving guide wheel; B21b, second driving guide wheel; B22, driven guide wheel; B22a, first driven guide wheel; B22b, second driven guide wheel; B23, first elastic member; B24, second induction member; B25, connecting rod; B26, second adjusting member;

[0050] B3, rope tightening assembly; B31, guide post; B32, movable seat; B33, second elastic member; B34, first adjusting member; B35, positioning guide wheel; B36, first sensed member;

[0051] B4, rope output motor;

[0052] B5, first sensor;

[0053] B6, second sensor;

[0054] B7, third sensor;

[0055] B8, fourth sensor;

[0056] e. The first rope passage; f. The second rope passage. DETAILED DESCRIPTION

[0057] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0058] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0060] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0061] refer to Figure 1-6 , an embodiment of the present invention shows a rope-discharging device for a hoist, comprising a housing B1, a rope guide assembly B2, a rope tightening assembly B3, a rope-discharging motor B4, and a first sensor B5;

[0062] The shell B1 is provided with a rope inlet end B12 and a rope outlet end B11; the guide rope assembly B2 includes at least one driving guide wheel B21, at least one driven guide wheel B22 and a first elastic member B23, the driving guide wheel B21 is rotatably provided on the shell B1, the driven guide wheel B22 is movably provided on the shell B1 along a prescribed path, a first rope passage e for the rope 300 to pass through is formed between the outer peripheral wall of the driving guide wheel B21 and the outer peripheral wall of the driven guide wheel B22, the first elastic member B23 is used to push the driven guide wheel B22 close to the driving guide wheel B21; the rope tightening assembly B3 is located on the side of the guide rope assembly B2 close to the rope inlet end B12, ... Component B3 includes a guide column B31, a movable seat B32 and a second elastic member B33; the movable seat B32 is slidably arranged on the guide column B31, and a second rope passing channel f is provided on the movable seat B32. The movable seat B32 is configured to move in a first direction on the guide column B31 under the action of the taut rope 300, and the second elastic member B33 is used to apply an elastic force to the movable seat B32 to move in a second direction on the guide column B31. The first direction and the second direction are two opposite directions in the length direction of the guide column B31; the rope-output motor B4 is transmission-connected to the active guide wheel B21; the first sensor B5 is used to detect the position of the movable seat B32 on the guide rod.

[0063] Among them, the rope-out motor B4 drives the active guide wheel B21 to rotate, and the driven guide wheel B22 can press the rope 300 onto the active guide wheel B21 under the action of the first elastic member B23, and the active guide wheel B21 drives the rope 300 through friction to pull out the rope 300; preferably, the outer peripheral walls of the active guide wheel B21 and the driven guide wheel B22 are both recessed with a groove with a U-shaped cross-section (not marked in the figure), so that the outer peripheral walls of the active guide wheel B21 and the driven guide wheel B22 can match the outer surface contour of the rope 300, so that the rope 300 is not easy to detach from between the active guide wheel B21 and the driven guide wheel B22.

[0064] In addition, in order to facilitate understanding of the working process and advantages of the rope-discharging device B0, the rope-discharging device B0 is applied to a hoist for a detailed description of the working process;

[0065] like Figure 1, shows a lifter, which includes a frame 200, a rope winding shaft 100 rotatably arranged on the frame 200, and a rope 300 wound on the rope winding shaft 100; wherein the rope winding shaft 100 is driven to rotate by a driving device (not shown) to realize rope collection and release; the frame 200 is provided with a shell (not shown, but reference can be made to the prior art CN112551413A), and the shell has an outlet for the rope 300 to enter and exit, and the rope outlet device B0 is provided near the outlet.

[0066] Specifically, in the case of no gravity tightening the rope 300, the rope-out assembly can use the active guide wheel B21 and the driven guide wheel B22 of the rope guide assembly B2 to pull the rope 300 out of the elevator to avoid the rope 300 released from the rope winding shaft 100 from accumulating inside the elevator; wherein, when the rope-out assembly pulls out the rope 300, the rope 300 is pulled tight, such as Figure 9 As shown, the taut rope 300 exerts a force on the movable seat B32 of the tight rope assembly B3, driving the movable seat B32 to move along the guide post B31 in the first direction (at Figure 9 At the same time, the second elastic member B33 exerts a force on the movable seat B32 to move along the guide post B31 in the second direction (at Figure 9 The perspective is moving to the left), under the action of the tension of the rope 300 and the elastic force of the second elastic member B33, the position of the movable seat B32 on the guide column B31 tends to be stable, as shown in FIG. Figure 9 As shown, the distance between the first sensor B5 and the movable seat B32 is L1. It can be seen that when the tension of the rope 300 is smaller, the position of the movable seat B32 on the guide column B31 is further to the left. Figure 10 As shown, when the rope is slack, the distance between the first sensor B5 and the movable seat B32 is L2, where L1>L2. Therefore, the first sensor B5 can determine the degree of slack in the rope 300 by detecting the position of the movable seat B32 on the guide rod. When the rope 300 slackens to a certain extent, it indicates that the rope guide assembly B2's rope delivery speed is less than or much less than the rope winding shaft 100's rope release speed. In this case, the drive device can be turned off to stop the rope winding shaft 100 from releasing the rope 300 before the rope 300 becomes tangled within the hoist.

[0067] Preferably, the first sensor B5 may detect that the moving seat B32 is too far to the left ( Figure 9 The first sensor B5 may be electrically connected to the driving device, and when the first sensor B5 detects that the moving seat B32 is too far to the left ( Figure 9After the lifter lifts the object, the rope 300 will be tightened by the gravity of the object, and the movable seat B32 will not move too far to the left ( Figure 9 That is, the driving device will not be stopped by the first sensor B5 during the lifting process of the lifter.

[0068] The above scheme is specific, such as Figure 6 As shown, two positioning guide wheels B35 are rotatably mounted on the movable base B32. A U-shaped groove (not labeled) is formed on the outer peripheral wall of each positioning guide wheel B35. The second rope passage f is formed between the two positioning guide wheels B35. This ensures that the rope 300 can be unimpeded when passing through the rope tightening assembly B3, preventing the rope tightening assembly B3 from affecting the rope 300's exit. In this embodiment, the positioning guide wheels B35 can be slidably mounted on the guide column B31 via a sliding bearing (not labeled), allowing the positioning guide wheels B35 and the movable base B32 to move synchronously.

[0069] The above scheme is specific, such as Figure 6 and Figure 7 As shown, the second elastic member B33 is a spring sleeved on the guide post B31, forming a squeeze fit with one side of the movable base B32. The first sensor B5 is fixed to the housing B1 and is located on the side of the movable base B32 away from the elastic member. A first sensing member B36 for sensing by the first sensor B5 is provided on the side of the movable base B32 close to the first sensor B5. The first sensing member B36 can be a magnet, and the first sensor B5 can be a photoelectric sensor. When the movable base B32 approaches within a certain distance of the first sensor B5, the first sensor B5 can sense the first sensing member B36.

[0070] The above scheme is specific, such as Figure 6 As shown, a first adjusting member B34 is connected to the side of the second elastic member B33 away from the movable seat B32. The first adjusting member B34 is threadedly connected to the housing B1 to adjust the position of the first adjusting member B34 along the axial direction of the second elastic member B33. In this way, the elastic force applied by the second elastic member B33 to the movable seat B32 can be adjusted by rotating the first adjusting member B34.

[0071] In some embodiments, in order to reduce the risk of the rope 300 breaking and improve the safety of the lifter, Figure 4 and Figure 5As shown, the system further includes a second sensor B6 fixed to the housing B1. A second sensing element B24 is provided on the outer side of the driven guide wheel B22. When the driven guide wheel B22 approaches the driving guide wheel B21 to a certain distance, the second sensor B6 senses the second sensing element B24. The second sensing element B24 may be a magnet, and the second sensor B6 may be a photoelectric sensor.

[0072] In this embodiment, the thickness of the rope 300 at the breaking position will become smaller before it breaks. The change in the thickness of the rope 300 is not instantaneous. When the thickness of the rope 300 becomes smaller, the driven guide wheel B22 can be closer to the active guide wheel B21, that is, the first rope passage e between the active guide wheel B21 and the driven guide wheel B22 will become smaller. When the thickness of the rope 300 is reduced to a certain extent, the second sensor B6 can sense the second sensed part B24, which means that the rope 300 needs to be replaced, thereby avoiding the rope 300 from breaking during subsequent use.

[0073] In some embodiments, when the lifter is lifting an object, the rope 300 will be tightened by the gravity of the object, and the rope 300 will not only generate a force on the moving seat B32, but also generate a force on the driven guide wheel B22, so that the driven guide wheel B22 is away from the driving guide wheel B21, thereby separating the rope 300 from the driving guide wheel B21, and preventing the driving guide wheel B21 from rubbing against the rope 300; Figure 4 As shown, this embodiment further includes a third sensor B7, which is fixed to the housing B1 and electrically connected to the rope-discharging motor B4. When the driven guide wheel B22 moves a certain distance away from the driving guide wheel B21, the third sensor B7 senses the second sensing element B24, triggering the rope-discharging motor B4 to stop. Thus, when the third sensor B7 senses the second sensing element B24, indicating that the rope 300 is separated from the driving guide wheel B21, the rope-discharging motor B4 automatically stops, preventing the driving guide wheel B21 from idling and reducing energy consumption of the hoist.

[0074] In some embodiments, reference Figure 4, further comprising a fourth sensor B8 and a third sensed element; the third sensed element is disposed at the end of the rope 300; the fourth sensor B8 is disposed at the rope outlet end B11 of the housing B1, and the fourth sensor B8 is used to sense the third sensed element. According to prior art CN112551413A, a rope-locking device is connected to the end of the rope 300. When the rope winding shaft 100 completes rope collection but does not stop in time, the rope-locking device will collide with the housing of the elevator and may burn out the drive device that drives the rope winding shaft 100 to rotate. In this embodiment, by disposing the third sensed element at the end of the rope 300, the fourth sensor B8 can be electrically connected to the drive device that drives the rope winding shaft 100 to rotate. When rope collection is completed, the fourth sensor B8 can sense the third sensed element, and the fourth sensor B8 can trigger the drive device to stop working, preventing the rope winding shaft 100 from continuing to rotate and collect the rope.

[0075] The third sensed component may be a color layer provided at the end of the rope 300, and the fourth sensor B8 may be a color sensor. For another example, the third sensed component may be a magnetic component fixed at the end of the rope 300, and the fourth sensor B8 may be a photoelectric sensor.

[0076] In some embodiments, as Figure 5 As shown, the first elastic member B23 is a spring. One end of the first elastic member B23 forms a compression fit with the driven guide wheel B22, and the other end of the first elastic member B23 is connected to a second adjustment member B26. The second adjustment member B26 is threadedly connected to the housing B1 to adjust the position of the second adjustment member B26 along the axial direction of the first elastic member B23. The first elastic member B23 does not directly contact the driven guide wheel B22, and the compression of the first elastic member B23 does not affect the rotation of the driven guide wheel B22. By adjusting the position of the second adjustment member B26, the elastic force applied by the first elastic member B23 on the driven guide wheel B22 can be adjusted, thereby adjusting the clamping force of the rope 300 pressed into the first rope passage e.

[0077] In some embodiments, in order to further reduce the possibility of the rope 300 slipping on the guide rope assembly B2, as shown in FIG. Figure 6As shown, there are two driving guide wheels B21, which are defined as the first driving guide wheel B21a and the second driving guide wheel B21b respectively; there are two driven guide wheels B22, which are defined as the first driven guide wheel B22a and the second driven guide wheel B22b respectively, and a connecting rod B25 is connected between the first driven guide wheel B22a and the second driven guide wheel B22b, and the first driven guide wheel B22a and the second driven guide wheel B22b are respectively rotatably connected to the two ends of the connecting rod B25, and the middle part of the connecting rod B25 is hinged to the housing B1; the connecting line between the first driving guide wheel B21a and the second driving guide wheel B21b is arranged to intersect with the connecting line between the first driven guide wheel B22a and the second driven guide wheel B22b; the first rope passing channel e is formed between the first driving guide wheel B21a and the first driven guide wheel B22a, and between the second driving guide wheel B21b and the second driven guide wheel B22b; as shown Figure 7 As shown, the second induction member B24 can be arranged outside the first driven guide wheel B22a, or as shown in FIG. Figure 8 As shown, the second sensed member B24 can be disposed outside the second driven guide wheel B22b. The first elastic member B23 can act on the connecting rod B25, which, when swung, drives the first and second driven guide wheels B22a and B22b to move. In this embodiment, by clamping the rope 300 at two locations, the possibility of the rope 300 slipping on the guide rope assembly B2 can be further reduced.

[0078] In some embodiments, according to the prior art CN112551413A, the rope 300 on the rope winding shaft 100 can be provided with multiple ropes. Even if part of the rope 300 breaks, the lifting object will not fall, thereby improving safety. In this embodiment, if Figure 3 As shown, the guide rope assembly B2, the rope tightening assembly B3 and the first sensor B5 are respectively provided in multiple groups and correspond one to one, while the rope output motor B4 is only provided with one. The active guide wheels B21 in the multiple groups of guide rope assemblies B2 are all fixedly sleeved on a transmission shaft B13. In this way, one rope output motor B4 can drive the active guide wheels B21 in all the guide rope assemblies B2 to rotate, thereby reducing the number of rope output motors B4 and reducing the cost of the lifter.

[0079] In summary, an embodiment of the present invention provides a rope-discharging device for a hoist, wherein the rope-discharging device B0 is provided with a guide rope assembly B2, and the active guide wheel B21 and the driven guide wheel B22 can be used to pull the rope 300 out of the hoist, thereby preventing the rope 300 released from the rope winding shaft 100 from accumulating inside the hoist; at the same time, a rope tightening assembly B3 and a first sensor B5 are further provided. On the one hand, the rope tightening assembly B3 can promote the tension of the rope 300, which is beneficial for the guide rope assembly B2 to pull out the rope 300; on the other hand, when the guide rope assembly B2 is not started or the guide rope assembly B2 fails, resulting in the rope releasing speed of the rope winding shaft 100 being higher than the rope discharging speed of the guide rope assembly B2, it can be determined whether the rope 300 is slack in the hoist based on the detection result of the first sensor B5. If so, the rope winding shaft 100 can be stopped to release the rope 300, thereby preventing the rope 300 from being tangled into a ball inside the hoist.

[0080] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A rope-discharging device for a hoist, characterized in that: include: Housing, guide rope assembly, rope tightening assembly, rope output motor and first sensor; The housing is provided with a rope inlet end and a rope outlet end; The guide rope assembly includes at least one driving guide wheel, at least one driven guide wheel, and a first elastic member. The driving guide wheel is rotatably arranged on the housing, and the driven guide wheel is movably arranged on the housing along a specified path. A first rope passage for the rope to pass through is formed between the outer peripheral walls of the driving guide wheel and the outer peripheral walls of the driven guide wheel. The first elastic member is used to push the driven guide wheel close to the driving guide wheel. The rope tightening assembly is located on a side of the guide rope assembly close to the rope feed end, and the rope tightening assembly includes a guide post, a movable seat, and a second elastic member; the movable seat is slidably arranged on the guide post, and a second rope passing channel is provided on the movable seat. The movable seat is configured to move in a first direction on the guide post under the force of the taut rope, and the second elastic member is used to apply an elastic force to the movable seat to move in a second direction on the guide post, and the first direction and the second direction are two opposite directions along the length direction of the guide post; The rope-discharging motor is in transmission connection with the driving guide wheel; The first sensor is used to detect the position of the movable seat on the guide post; Also included is a second sensor, the second sensor being fixed to the housing; A second induction member is provided on the outer side of the driven guide wheel; When the driven guide wheel approaches the driving guide wheel to a certain distance, the second sensor senses the second sensed member; There are two active guide wheels, which are defined as a first active guide wheel and a second active guide wheel; There are two driven guide wheels, defined as a first driven guide wheel and a second driven guide wheel, a connecting rod is connected between the first driven guide wheel and the second driven guide wheel, the first driven guide wheel and the second driven guide wheel are rotatably connected to the two ends of the connecting rod respectively, and the middle part of the connecting rod is hinged to the housing; The connecting line between the first driving guide wheel and the second driving guide wheel is arranged to intersect with the connecting line between the first driven guide wheel and the second driven guide wheel; the first rope passing channel is formed between the first driving guide wheel and the first driven guide wheel, and between the second driving guide wheel and the second driven guide wheel; The second induced member is arranged on the outer side of the first driven guide wheel or the second driven guide wheel.

2. The rope-discharging device for a lifter according to claim 1, characterized in that: Two positioning guide wheels are rotatably provided on the movable seat, and grooves with U-shaped cross sections are formed on the outer peripheral walls of the two positioning guide wheels. The second rope passing channel is formed between the two positioning guide wheels.

3. The rope-discharging device for a lifter according to claim 2, characterized in that: The second elastic member is a spring sleeved on the guide post, and the second elastic member forms an extrusion fit with one side of the movable seat; The first sensor is fixed on the housing, and the first sensor is located on a side of the movable base away from the elastic member; A first sensed component for sensing by the first sensor is provided on a side of the movable base close to the first sensor.

4. The rope-discharging device for a lifter according to claim 3, characterized in that: A first adjusting member is connected to a side of the second elastic member away from the movable seat. The first adjusting member is threadedly connected to the housing to achieve position adjustment of the first adjusting member along the axial direction of the second elastic member.

5. The rope-discharging device for a lifter according to claim 1, characterized in that: It also includes a third sensor, the third sensor is fixed on the housing, and the third sensor is electrically connected to the rope-discharging motor; When the driven guide wheel is away from the driving guide wheel to a certain distance, the third sensor senses the second sensed member, and the third sensor triggers the rope-discharging motor to stop working.

6. The rope-discharging device for a lifter according to claim 5, characterized in that: Also includes a fourth sensor and a third sensed member; The third sensed member is arranged at the end of the rope; The fourth sensor is arranged at the rope-out end of the housing, and the fourth sensor is used to sense the third sensed component.

7. The rope-discharging device for a lifter according to claim 1, characterized in that: The first elastic member is a spring, one end of the first elastic member forms an extrusion fit with the driven guide wheel, and the other end of the first elastic member is connected to a second adjusting member; the second adjusting member is threadedly connected to the housing to achieve position adjustment of the second adjusting member along the axial direction of the first elastic member.

8. The rope-discharging device for a lifter according to claim 1, characterized in that: The guide rope assembly, the rope tightening assembly and the first sensor are respectively provided in multiple groups and correspond one to one, the rope output motor is provided with one, and the active guide wheels in the multiple groups of guide rope assemblies are all fixedly sleeved on a transmission shaft.

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