A guide shoe device for an installed elevator with a stall protection function and a working method thereof

Abstract

The application discloses a kind of with stall protection function's elevator guide shoe device and working method of installing;The device includes beam frame, vertical guide rail and composite guide shoe.Composite guide shoe includes guide shoe base plate, guide mechanism and emergency brake mechanism.Emergency brake mechanism is installed on guide shoe base plate.Emergency brake mechanism includes wedge-shaped push plate, wedge-shaped brake plate, initial stage pushing mechanism and final stage lifting mechanism.Wedge-shaped brake plate is located on the side of wedge-shaped push plate close to vertical guide rail.The side of wedge-shaped push plate towards vertical guide rail is inclined downward slope;The side of wedge-shaped brake plate away from vertical guide rail is inclined downward slope;The application uses initial stage pushing mechanism with dead point and cable lifting combined with slope guide final stage lifting mechanism, moves wedge-shaped brake plate to brake position, and wedge-shaped brake plate can keep locked state after being in place, not easy to separate from vertical guide rail, to provide stable braking force without requiring motor to continuously carry out large torque output.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of elevators, and particularly relates to a guide shoe device for an installed elevator with a stall protection function and a working method thereof. BACKGROUND

[0002] In the current field of construction, especially in the renovation of old communities, the installation of assembled elevators faces many severe challenges and problems to be solved. The existing installation method of assembled elevator guide rails is relatively lagging, mainly relying on manual calculation to determine the distance between the guide rails and the flatness between the two guide rails. This operation method completely relying on human power is not only inefficient, but also easily affected by human factors, making it difficult to guarantee the accuracy and consistency of the measurement results.

[0003] More worrying is that due to the particularity of the installed elevator itself, the safety facilities of the elevator cannot meet the ideal standards and requirements in most cases. After the elevator is put into use, this defect is prone to cause various safety accidents, threatening the safety of people's lives, and causing unnecessary casualties and serious property losses.

[0004] The existing assembled elevator is mainly applied to the renovation project of old communities. However, the remaining space in old communities is usually small. However, the existing assembled elevator device has low integration and large floor area. This makes it necessary to carry out large-scale renovation and occupation of the originally limited space in the community during the installation process, further intensifying the conflict with the living space of residents. SUMMARY

[0005] The purpose of the present application is to provide a composite guide shoe device with a stall protection function for assisting the rapid installation of an installed elevator and a working method thereof.

[0006] The composite guide shoe device with a stall protection function for an installed elevator provided by the present application comprises a beam frame, a vertical guide rail and a composite guide shoe. The composite guide shoe comprises a guide shoe base plate, a guide mechanism and an emergency braking mechanism. The guide shoe base plate is fixed with the beam frame. The guide mechanism is used to cooperate with the vertical guide rail. The emergency braking mechanism is installed on the guide shoe base plate and aligned with the vertical guide rail. The emergency braking mechanism comprises a wedge-shaped push plate, a wedge-shaped braking plate, a preliminary-stage pushing mechanism and a final-stage lifting mechanism. The wedge-shaped push plate is slidably connected with the guide shoe base plate; the sliding of the wedge-shaped push plate is driven by the preliminary-stage pushing mechanism having a dead point position.

[0007] The wedge-shaped braking plate is located on the side of the wedge-shaped push plate close to the vertical guide rail. The side surface of the wedge-shaped push plate facing the vertical guide rail is an inclined downward slope; the side surface of the wedge-shaped braking plate away from the vertical guide rail is an inclined downward slope; and the wedge-shaped braking plate and the wedge-shaped push plate are connected through the winding cable in the final-stage lifting mechanism.

[0008] When braking is needed, firstly, the initial-stage pushing mechanism drives the wedge-shaped pushing plate to move towards the vertical guide rail and reach the dead point position; then, the final-stage pulling mechanism shortens the length of the pull rope between the wedge-shaped braking plate and the wedge-shaped pushing plate, so that the wedge-shaped braking plate is pulled upwards and approaches the vertical guide rail under the guidance of the inclined surface until the wedge-shaped braking plate contacts the vertical guide rail to perform friction braking.

[0009] Preferably, the initial-stage pushing mechanism comprises an eccentric wheel, a sleeve, a connecting rod and an initial-stage pushing motor. The eccentric position on the eccentric wheel is rotationally connected to the guide shoe base plate. The sleeve is rotationally connected to the outer circumferential surface of the eccentric wheel. One end of the connecting rod is fixed to the sleeve, and the other end of the connecting rod is rotationally connected to the wedge-shaped pushing plate. When the rotation centers of the eccentric wheel, the sleeve and the connecting rod and the wedge-shaped pushing plate are connected in a straight line, the initial-stage pushing mechanism reaches the dead point position.

[0010] Preferably, the final-stage pulling mechanism comprises two pull ropes and a winding assembly. The winding assembly is installed on the wedge-shaped pushing plate. The wedge-shaped pushing plate is provided with winding holes on both sides. The wedge-shaped pushing plate is provided with a winding channel in communication with the winding holes. One end of each of the two pull ropes is fixed to the two sides of the wedge-shaped braking plate. The other end of each of the two pull ropes penetrates the winding holes on the two sides of the wedge-shaped pushing plate and is connected to the winding assembly through the winding channel.

[0011] Preferably, the beam frame is in T shape; the vertical guide rails and the composite guide shoes are each three and correspond one by one; and the three composite guide shoes are respectively installed on the three end portions of the beam frame.

[0012] Preferably, the vertical guide rail is in T shape in cross section and is composed of a vertical guide plate and a reinforcing rib. The reinforcing rib is located in the middle of the side of the vertical guide plate away from the beam frame. The wedge-shaped braking plate is provided with a wear-resistant braking friction layer on the side surface facing the vertical guide rail.

[0013] Preferably, the angle between the inclined surface on the wedge-shaped pushing plate and the vertical surface is 45°. The following conditions are met:

[0014]

[0015] wherein, is the friction coefficient between the contact surface of the wedge-shaped pushing plate and the wedge-shaped braking plate; a is the vertical distance between the connection point of the pull rope and the wedge-shaped braking plate and the connection point of the pull rope and the wedge-shaped pushing plate in the initial state; b is the horizontal distance when the connection point of the pull rope and the wedge-shaped braking plate and the connection point of the pull rope and the wedge-shaped pushing plate are at the same height; v is the winding speed of the pull rope; t s is the braking time.

[0016] As preferred, the guiding mechanism comprises an opening and closing driving assembly and two single-side guiding assemblies. The single-side guiding assembly comprises a shoe plate, a shoe lining and a roller supporting assembly. The shoe plates of the two single-side guiding assemblies are driven to move towards or away from each other by the opening and closing driving assembly. The edge of the shoe plate is provided with a turned-up edge. The turned-up edge is fixed with the shoe lining on the inner side. The roller supporting assembly is installed on the shoe plate. The roller supporting assembly comprises a telescopic driving mechanism and a shoe roller. The shoe roller is driven by the telescopic driving mechanism to move horizontally, close to or away from the shoe lining. The two single-side guiding assemblies are respectively matched with the two side edges of the vertical guide rail; the shoe lining in the corresponding single-side guiding assembly is located between the shoe roller and the edge of the vertical guide rail.

[0017] As preferred, the shoe roller comprises an axle, a movable outer ring, permanent magnets, electromagnetic coils and a fixed inner ring. The axle is installed on the telescopic driving mechanism. The fixed inner ring is fixed on the axle. The fixed inner ring is embedded with a plurality of electromagnetic coils which are evenly distributed along the circumferential direction of the fixed inner ring. The hollow movable outer ring is coaxially sleeved on the outside of the fixed inner ring. The central hole of the movable outer ring and the axle form a rotating pair. The two sides or one side of the movable outer ring is embedded with a plurality of permanent magnets which are evenly distributed along the circumferential direction of the movable outer ring. The radial position of the permanent magnet matches the radial position of the electromagnetic coil.

[0018] As preferred, the telescopic driving mechanism comprises a first screw rod, a push rod and a telescopic driving motor. The first screw rod is rotatably connected in the installation groove of the shoe plate. The push rod and the sliding groove opened on the shoe plate form a sliding pair. The inner end of the push rod is provided with a threaded hole. The threaded hole on the push rod and the first screw rod form a screw pair. The shoe roller is installed on the outer end of the push rod.

[0019] As preferred, the opening and closing driving assembly comprises a bidirectional screw and an opening and closing driving motor. The bidirectional screw is rotatably connected on the shoe base plate and is driven to rotate by the opening and closing driving motor. The two shoe plates and the two screw segments with opposite rotation directions on the bidirectional screw form a screw pair respectively.

[0020] As preferred, the vertical guiding plate of the vertical guide rail is provided with a shoe lining on the side edge. The thickness of the shoe lining on the turned-up edge is less than or equal to the thickness of the shoe lining on the vertical guide rail.

[0021] The working method of the aforementioned elevator shoe device comprises an installation method and a braking method.

[0022] The installation method is as follows:

[0023] Firstly, the opening and closing driving assembly drives the two single-side guiding assemblies to move away from each other; the vertical guide rail is placed between the two single-side guiding assemblies; then, the opening and closing driving assembly drives the two single-side guiding assemblies to move towards each other, so that the shoe plates in the two single-side guiding assemblies clamp the two side edges of the vertical guide rail.

[0024] After that, the initial section pushing mechanism drives the wedge-shaped pushing plate and the wedge-shaped brake plate to move towards the vertical guide rail; the final section pulling mechanism pulls the wedge-shaped brake plate, so that the wedge-shaped brake plate needs to be close to the vertical guide rail until the vertical guide rail is clamped by the wedge-shaped brake plate and the folded edge on the guide shoe plate, and the positioning between the multiple vertical guide rails and the multiple composite guide shoes is completed.

[0025] Finally, each vertical guide rail is fixed with the elevator shaft.

[0026] The brake method is as follows:

[0027] The current value output by the electromagnetic coil is continuously detected; if the measured current value is greater than the preset current threshold value, it is judged that the elevator is stalled; first, the initial section pushing mechanism and the final section pulling mechanism drive the wedge-shaped brake plate to approach the vertical guide rail in turn, and the friction between the wedge-shaped brake plate and the vertical guide rail is used for braking.

[0028] The present application has the beneficial effects that:

[0029] 1. The initial section pushing mechanism with a dead point is used in combination with the cable pulling and the inclined surface guide final section pulling mechanism to drive the wedge-shaped brake plate to move to the brake position, and the wedge-shaped brake plate can be kept in a locked state after being in place, so that it is not easy to be separated from the vertical guide rail, thereby providing stable braking force without requiring the motor to continuously output large torque, and improving the reliability of elevator braking.

[0030] 2. The present application simplifies the guide rail installation steps, optimizes the matching installation of the car and the guide rail, improves the efficiency of elevator installation, ensures the safety of elevator operation, improves the utilization rate of mechanical structure, simplifies the mechanical structure, reduces the number of parts, improves the reliability of components, and reduces the manufacturing cost.

[0031] 3. The present application uses the shoe lining on the guide shoe plate and the guide shoe wheel to perform sliding and rolling composite guidance on the vertical rail, and the guide shoe wheel can be extended and retracted under the drive of the motor, so as to ensure that the guide shoe wheel can continuously and stably abut against the vertical rail, solving the problem of loosening of the guide shoe due to long-term use. At the same time, the rotating permanent magnet on the guide shoe wheel rotates and cuts the magnetic induction line with the fixed electromagnetic coil inside, generating current, which is amplified by an amplifier and transmitted back to the control cabinet. The running state of the elevator is monitored to determine whether the elevator is stalled. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present application supporting the elevator car.

[0033] Figure 2 It is a whole structure schematic diagram of the present application.

[0034] Figure 3 Figure 1 is a perspective view of the composite guide shoe hiding a single-sided guide assembly in the present application.

[0035] Figure 4 Figure 2 is a structural schematic view of the guide mechanism in the present application.

[0036] Figure 5 Figure 3 is a structural schematic view of the telescopic drive mechanism in the present application.

[0037] Figure 6 Figure 4 is a perspective view of the guide shoe wheel in the present application.

[0038] Figure 7 Figure 5 is a cross-sectional view of the guide shoe wheel in the present application.

[0039] Figure 8 Figure 6 is a structural schematic view of the emergency brake mechanism in the present application.

[0040] Figure 9 Figure 7 is a structural schematic view of the winding assembly in the present application.

[0041] Figure 10 Figure 8 is a working process schematic view of the terminal pulling mechanism in the present application.

[0042] Figure 1 is a perspective view of the composite guide shoe hiding a single-sided guide assembly in the present application. Figure 2 is a structural schematic view of the guide mechanism in the present application. Figure 3 is a structural schematic view of the telescopic drive mechanism in the present application. Figure 4 is a perspective view of the guide shoe wheel in the present application. Figure 5 is a cross-sectional view of the guide shoe wheel in the present application. Figure 6 is a structural schematic view of the emergency brake mechanism in the present application. Figure 7 is a structural schematic view of the winding assembly in the present application. Figure 8 is a working process schematic view of the terminal pulling mechanism in the present application. DETAILED DESCRIPTION

[0043] The present application is further described below in conjunction with the accompanying drawings.

[0044] As Figure 1 and Figure 2As shown in the figure, a kind of elevator guide shoe device with stall protection function, including beam frame 1, three vertical guide rails 2 and three composite guide shoes 3.The beam frame 1 is T-shaped, with three support beams;Two support beams are connected in a straight line;Three support beams of the beam frame 1 are provided with mounting holes for bolt connection of the bottom of the elevator car 4.The three composite guide shoes 3 are installed at the outer end of the three support beams of the beam frame 1.The cross section of the vertical guide rail 2 is T-shaped, composed of vertical guide plate 2-1 and reinforcing rib 2-2.The reinforcing rib 2-2 is integrally formed in the middle of the side of the vertical guide plate 2-1 away from the elevator car 4.The two side edges of the vertical guide plate 2-1 cooperate with the two one-side guide assemblies of the clamping jaw type of the composite guide shoe 3 to realize the guidance of the elevator car 4.

[0045] As shown in the figure, Figure 3 The composite guide shoe 3 includes guide shoe base plate 5, guide mechanism 6 and emergency brake mechanism 7.The guide shoe base plate 5 is integrally formed with the end of the support beam of the beam frame 1;The guide mechanism 6 includes opening and closing drive assembly and two one-side guide assemblies.The opening and closing drive assembly includes two bidirectional screws 6-1 and two opening and closing drive motors 6-2.The two bidirectional screws 6-1 arranged in upper and lower positions are rotatably connected to the middle of the guide shoe base plate 5.The axis of the bidirectional screw 6-1 is parallel to the width direction of the vertical guide plate 2-1 of the beam frame 1.

[0046] As shown in the figure, Figure 4 The one-side guide assembly includes guide shoe plate 6-3, shoe lining 6-5 and two roller support assemblies.Two threaded holes corresponding to the two bidirectional screws 6-1 are formed in the guide shoe plate 6-3.The two screw threads with opposite rotation directions on the bidirectional screw 6-1 and the threaded holes in the two guide shoe plates 6-3 form screw pairs respectively.

[0047] The inner side of the guide shoe plate 6-3 away from the edge of the elevator car 4 is provided with a flange 6-4.The flanges 6-4 on the two guide shoe plates 6-3 together form a jaw structure cooperating with the vertical guide rail 2.The shoe lining 6-5 is fixed on the inner side of the flange 6-4.The shoe lining 6-5 is installed on the two side edges of the vertical guide plate 2-1 of the vertical guide rail 2.The thickness of the shoe lining 6-5 on the flange 6-4 is less than or equal to the thickness of the shoe lining 6-5 on the vertical guide rail 2.

[0048] As shown in the figure, Figure 5As shown, two roller support assemblies are mounted on the guide shoe plate 6-3 and are arranged in vertical direction. The roller support assembly comprises a telescopic driving mechanism 6-6 and a guide shoe wheel 6-7. The guide shoe plate 6-3 is provided with a mounting groove for mounting the roller support assembly. The telescopic driving mechanism 6-6 comprises a first screw rod 6-6-2, a push rod 6-6-1 and a telescopic driving motor 6-6-3. The first screw rod 6-6-2 is rotatably connected in the mounting groove of the guide shoe plate 6-3. The push rod 6-6-1 and a sliding groove provided on the guide shoe plate 6-3 constitute a sliding pair. The inner end of the push rod 6-6-1 is provided with a threaded hole. The threaded hole on the push rod 6-6-1 and the first screw rod 6-6-2 constitute a screw pair. The guide shoe wheel 6-7 is mounted on the outer end of the push rod 6-6-1.

[0049] The guide shoe wheel 6-7 is aligned with the shoe lining 6-5. The telescopic driving mechanism 6-6 is used to drive the guide shoe wheel 6-7 to move; the movement of the guide shoe wheel 6-7 is perpendicular to the side surface of the shoe lining 6-5. During operation, the shoe lining 6-5 is in contact with the outer side surface of the vertical guide plate 2-1 of the vertical guide rail 2; the outer circumferential surface of the guide shoe wheel 6-7 abuts against the inner side surface of the vertical guide plate 2-1. The shoe lining 6-5 and the guide shoe wheel 6-7 clamp the edge of the vertical guide plate 2-1, realizing the stable sliding connection between the vertical guide rail 2 and the composite guide shoe 3. The connection between the flange 6-4 and the inner side surface of the guide shoe plate 6-3 is provided with a clamping groove structure. The guide shoe wheel 6-7 is in the clamping groove structure.

[0050] As shown in Figure 6 and Figure 7 The guide shoe wheel 6-7 comprises an axle 6-7-1, a movable outer ring 6-7-2, permanent magnets 6-7-3, electromagnetic coils 6-7-4 and a fixed inner ring 6-7-5. The outer end of the push rod 6-6-1 is fixed with the axle 6-7-1. The fixed inner ring 6-7-5 is fixed on the axle 6-7-1. The fixed inner ring 6-7-5 is embedded with a plurality of electromagnetic coils 6-7-4 which are uniformly distributed along the circumferential direction of the axis of the fixed inner ring 6-7-5; the hollow movable outer ring 6-7-2 is coaxially sleeved on the outer side of the fixed inner ring 6-7-5. The central hole of the movable outer ring 6-7-2 and the axle 6-7-1 constitute a rotating pair. The two side surfaces of the movable outer ring 6-7-2 are embedded with a plurality of permanent magnets 6-7-3 which are uniformly distributed along the circumferential direction of the axis of the movable outer ring 6-7-2. The radial position of the permanent magnets 6-7-3 matches the radial position of the electromagnetic coils 6-7-4; when the movable outer ring 6-7-2 rotates around the fixed inner ring 6-7-5, each permanent magnet 6-7-3 passes through different electromagnetic coils 6-7-4 in turn, so that the electromagnetic coils 6-7-4 continuously generate magnetic field changes and output induced current; by detecting the size of the induced current, the rotating speed of the movable outer ring 6-7-2 can be reflected, and then the detection of the lifting speed of the elevator car 4 is realized.

[0051] Further, when the elevator is put into operation, the relative displacement between the car and the guide rail causes the movable outer ring 6-7-2 to start rotating, which drives the permanent magnet 6-7-3 to rotate. Since the fixed inner ring 6-7-5 is connected with the push rod, the electromagnetic coils 6-7-4 group on the fixed inner ring 6-7-5 cut the magnetic induction lines with the permanent magnet 6-7-3, generating an electric current, which is amplified by the amplifier and transmitted back to the control cabinet. Thus, the running state of the elevator is monitored. When the elevator loses speed, the car speed increases, driving the movable outer ring 6-7-2 to rotate faster, and the cutting magnetic induction lines between the permanent magnet 6-7-3 and the electromagnetic coils 6-7-4 group become more intense, generating an electric current exceeding the set threshold, which sends a signal that the elevator is losing speed, and the speed loss protection starts. The shoe liner 6-5 remains stationary, the telescopic drive motor 6-6-3 drives the first screw rod 6-6-2 to rotate, lifting the push rod 6-6-1, the guide shoe wheel 6-7 is retracted into the shoe liner 6-5, preventing sudden high-speed movement from causing wear to the guide shoe wheel 6-7.

[0052] As shown in Figure 4 , Figure 8 and Figure 9 , the emergency brake mechanism 7 is installed on the outside of the guide shoe base plate 5 and is aligned with the middle of the inner side surface of the vertical guide rail 2, and is used for friction locking by pressing the vertical guide rail 2. The emergency brake mechanism 7 includes a wedge-shaped push plate 7-1, a wedge-shaped brake plate 7-2, a preliminary pushing mechanism 7-3, and a final pulling mechanism 7-4. The wedge-shaped push plate 7-1 is slidingly connected to the groove of the guide shoe base plate 5; the sliding direction of the wedge-shaped push plate 7-1 is perpendicular to the inner side surface of the vertical guide rail 2; and the wedge-shaped brake plate 7-2 is located on the side of the wedge-shaped push plate 7-1 close to the vertical guide rail 2. The side of the wedge-shaped push plate 7-1 facing the vertical guide rail 2 is an inclined downward slope; the side of the wedge-shaped brake plate 7-2 facing away from the vertical guide rail 2 is an inclined downward slope; and the wedge-shaped brake plate 7-2 and the wedge-shaped push plate 7-1 form a wedge-shaped structure that cooperates with each other. The left and right sides of the wedge-shaped push plate 7-1 and the left and right sides of the wedge-shaped brake plate 7-2 are connected by a cable 7-4-1 in the final pulling mechanism 7-4. The side of the wedge-shaped brake plate 7-2 facing the vertical guide rail 2 is provided with a wear-resistant brake friction layer 7-5.

[0053] In some further embodiments, the angle between the slope on the wedge-shaped push plate 7-1 and the vertical surface satisfies the following conditions:

[0054] Condition 1: ; wherein is the friction coefficient between the contact surface of the wedge-shaped push plate 7-1 and the wedge-shaped brake plate 7-2; condition 1 is used to ensure that the wedge-shaped push plate 7-1 and the wedge-shaped brake plate 7-2 do not slide relative to each other due to the downward component force of the support force of the vertical guide rail 2, and to ensure that the winding assembly 7-4-2 in the final pulling mechanism 7-4 can stop working after being pulled into place, without the need to continuously maintain tension.

[0055] Condition 2: ; wherein, as shown in Figure 10 a is the vertical distance (height difference) between the connecting point of the cable and the wedge-shaped brake plate 7-2 and the connecting point of the cable and the wedge-shaped push plate 7-1 in the initial state; b is the horizontal distance when the connecting point of the cable and the wedge-shaped brake plate 7-2 is at the same height as the connecting point of the cable and the wedge-shaped push plate 7-1 (the equal height state is the limit state of the upward movement of the wedge-shaped brake plate 7-2); v is the cable winding line speed; t s is the braking time, which is preferably 0.5s. Note: The connecting point of the cable and the wedge-shaped brake plate 7-2 being at the same height as the connecting point of the cable and the wedge-shaped push plate 7-1 is a set limit state, which cannot be truly reached in time work. Condition 2 is used to ensure that the wedge-shaped brake plate 7-2 can be pulled from the initial state to the braking state within the set braking time.

[0056] The initial stage pushing mechanism 7-3 includes an eccentric wheel 7-3-1, a sleeve 7-3-2, a connecting rod 7-3-3, and an initial stage pushing motor. The eccentric position on the eccentric wheel 7-3-1 is rotationally connected to the guide shoe base plate 5. The sleeve 7-3-2 is rotationally connected to the outer circumferential surface of the eccentric wheel 7-3-1. One end of the connecting rod 7-3-3 is fixed to the sleeve 7-3-2; the other end of the connecting rod 7-3-3 is rotationally connected to the wedge-shaped push plate 7-1. The rotation of the eccentric wheel 7-3-1 drives the wedge-shaped push plate 7-1 to slide back and forth;

[0057] The eccentric wheel 7-3-1, the sleeve 7-3-2, the connecting rod 7-3-3, and the wedge-shaped push plate 7-1 form a crank slider mechanism; when the rotation center of the eccentric wheel 7-3-1, the rotation center of the sleeve 7-3-2, and the rotation center between the connecting rod 7-3-3 and the wedge-shaped push plate 7-1 are connected in a straight line, the wedge-shaped push plate 7-1 moves outward to the limit position, and the crank slider mechanism is at the dead point; the pushing force on the wedge-shaped push plate 7-1 during braking does not drive the eccentric wheel 7-3-1 to rotate, so as to provide greater braking force.

[0058] The last-stage pulling mechanism 7-4 includes two cables 7-4-1 and a winding assembly 7-4-2. The winding assembly 7-4-2 is installed on the wedge-shaped push plate 7-1. The wedge-shaped push plate 7-1 is provided with a winding hole on each of the left and right side surfaces (specifically, the side surfaces facing the two guide shoe plates 6-3). The wedge-shaped push plate 7-1 is provided with a winding channel in communication with the winding holes. One end of each of the two cables 7-4-1 is fixed to the left and right side surfaces (specifically, the side surfaces facing the two guide shoe plates 6-3) of the wedge-shaped brake plate 7-2. The other end of each of the two cables 7-4-1 penetrates into the winding hole on the left or right side of the wedge-shaped push plate 7-1 and is connected to the winding assembly 7-4-2 through the winding channel. The winding assembly 7-4-2 adopts a conventional winding structure and specifically includes a winding motor and a winding wheel. The winding wheel is rotationally connected to the wedge-shaped push plate 7-1 and is driven to rotate by the winding motor. The end of the cable 7-4-1 is fixed to the winding wheel. The connection point of the cable 7-4-1 and the wedge-shaped brake plate 7-2 is higher than the center of gravity of the wedge-shaped brake plate 7-2, so that the wedge-shaped brake plate 7-2 is more likely to maintain the state of contacting the wedge-shaped push plate 7-1.

[0059] When the cable 7-4-1 between the wedge-shaped brake plate 7-2 and the wedge-shaped push plate 7-1 is not tensioned, after the wedge-shaped push plate 7-1 moves to the limit position close to the vertical guide rail 2, the wedge-shaped brake plate 7-2 is still not in contact with the vertical guide rail 2. During the braking process, the initial-stage pushing mechanism 7-3 drives the wedge-shaped push plate 7-1 to slide, thereby driving the wedge-shaped brake plate 7-2 to complete the initial-stage transverse displacement, so that the wedge-shaped brake plate 7-2 is close to the vertical guide rail 2. Then, the winding of the cable 7-4-1 by the last-stage pulling mechanism 7-4 can pull the wedge-shaped brake plate 7-2 upward. Under the action of the inclined surface, the wedge-shaped brake plate 7-2 can move transversely while moving upward to be close to the vertical guide rail 2. When the wedge-shaped brake plate 7-2 contacts and presses the vertical guide rail 2, a stable friction locking structure is formed between the wedge-shaped brake plate 7-2 and the wedge-shaped push plate 7-1, and the wedge-shaped brake plate 7-2 will not slide downward relative to the wedge-shaped push plate 7-1 to be unlocked. Moreover, during the process of the wedge-shaped brake plate 7-2 descending relative to the vertical guide rail 2, the wedge-shaped brake plate 7-2 can further drive the wedge-shaped brake plate 7-2 to move upward relative to the wedge-shaped push plate 7-1, thereby further improving the locking force.

[0060] The sum of the maximum transverse displacement of the wedge-shaped push plate 7-1 driven by the initial-stage pushing mechanism 7-3 and the transverse component of the displacement of the wedge-shaped brake plate 7-2 driven by the last-stage pulling mechanism 7-4 is greater than the distance between the wedge-shaped brake plate 7-2 and the vertical guide rail 2 in the initial state. During the braking process, the dead point of the eccentric wheel 7-3-1 and the self-locking design of the wedge-shaped push plate 7-1 and the wedge-shaped brake plate 7-2 are used to realize the braking and deceleration effect on the guide rail during operation, thereby ensuring the safety of passengers.

[0061] The working principle of the embodiment is as follows:

[0062] The embodiment has two working conditions. In the elevator installation stage, after the initial vertical rail is installed manually, the bidirectional screw rod 6-1 of the device is rotated, the guide shoe plates 6-3 at both ends of the screw rod move in opposite directions to loosen, the telescopic drive motor 6-6-3 drives the first screw rod 6-6-2 to rotate to lift the push rod 6-6-1, the guide shoe wheel 6-7 is retracted into the guide shoe plate 6-3, half of which is sleeved on the three installed guide rails, and the other half is inserted into the new guide rail. The guide shoe plates 6-3 at both ends of the bidirectional screw rod are tightened to the middle, the shoes on the guide shoe plates 6-3 clamp the T-shaped guide rail, the telescopic drive motor 6-6-3 drives the first screw rod 6-6-2 to rotate to lower the push rod 6-6-1, and the guide shoe wheel 6-7 is matched with the vertical guide rail 2 according to the national standard requirements. When the composite guide shoe 3 is matched in place, the eccentric shaft motor drives the eccentric wheel 7-3-1 to rotate, the eccentric wheel 7-3-1 pushes the sleeve 7-3-2 and the connecting rod 7-3-3 to resist the wedge-shaped push plate 7-1 and the wedge-shaped brake plate 7-3 on the upper and lower vertical guide rails 2, so as to accurately position and quickly install the upper and lower vertical guide rails 2 by extruding in front, back, left and right directions. Install in sequence, when the last three guide rails are installed, directly connect the beam 1 with the bottom of the elevator car 4 to serve as a guide shoe.

[0063] When the elevator is put into use, if the gap between the shoe liner 6-5 or the guide shoe wheel 6-7 and the guide rail is too large, it can be adjusted by rotating the bidirectional screw rod 6-1 and the first screw rod 6-6-2, thereby improving the service life of the device and improving the safety of the elevator operation.

[0064] In the elevator operation stage, the relative displacement between the car and the guide rail causes the movable outer ring 6-7-2 to start rotating, driving the permanent magnet 6-7-3 to rotate. Since the fixed inner ring 6-7-5 is connected and fixed with the push rod, the electromagnetic coil group 6-7-4 on it cuts the magnetic induction line with the permanent magnet 6-7-3, generates current, amplifies through the amplifier, and returns to the control cabinet. The control center records the current data of the first elevator operation to obtain the highest current threshold value of the normal operation of the elevator. The current generated by the speed limiting guide wheel after being put into use is compared with the highest current threshold value. When the current exceeds the highest current threshold value, the overspeed protection device of the elevator is started to ensure the safety of the elevator passengers.

[0065] When the elevator is in a stall, the rotating speed of the movable outer ring 6-7-2 is accelerated by the car speed increase, the cutting magnetic induction line movement of the permanent magnet 6-7-3 and the electromagnetic coil 6-7-4 becomes more intense, the generated current exceeds the set threshold, an elevator stall signal is sent out, and the stall protection starts. The guide shoe plate 6-3 remains stationary, the telescopic drive motor 6-6-3 drives the first screw rod 6-6-2 to rotate to lift the push rod 6-6-1, the guide shoe wheel 6-7 is retracted into the guide shoe plate 6-3, and the sudden high-speed movement is prevented from causing wear to the guide shoe wheel 6-7. The eccentric shaft motor drives the eccentric wheel 7-3-1 to rotate, the eccentric wheel 7-3-1 pushes the sleeve 7-3-2 and the connecting rod 7-3-3 to drive the wedge-shaped push plate 7-1 to slide, and the wedge-shaped brake plate 7-2 is driven to complete the initial horizontal displacement, so that the wedge-shaped brake plate 7-2 approaches the vertical guide rail 2; then, the last segment lifting mechanism 7-4 winds the cable 7-4-1, which can pull the wedge-shaped brake plate 7-2 upward, and under the action of the inclined surface, the wedge-shaped brake plate 7-2 can move horizontally while moving upward to approach the vertical guide rail 2; when the wedge-shaped brake plate 7-2 contacts, a friction locking structure of locking force is formed. The dead point of the eccentric wheel 7-3-1 and the self-locking design of the wedge-shaped push plate 7-1 and the wedge-shaped brake plate 7-2 are used to realize the braking and speed reduction of the guide rail during operation, and the safety of passengers is ensured.

[0066] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

[0067] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A retrofitted elevator guide shoe device with a stall protection function, comprising a beam frame (1), a vertical guide rail (2) and a composite guide shoe (3); the composite guide shoe (3) comprises a guide shoe base plate (5), a guide mechanism (6) and an emergency braking mechanism (7); the guide shoe base plate (5) is fixed with the beam frame (1); the guide mechanism (6) is used for cooperating with the vertical guide rail (2); the emergency braking mechanism (7) is installed on the guide shoe base plate (5) and aligned with the vertical guide rail (2); characterized in that: The emergency braking mechanism (7) comprises a wedge-shaped push plate (7-1), a wedge-shaped braking plate (7-2), a first-stage pushing mechanism (7-3) and a last-stage pulling mechanism (7-4); the wedge-shaped push plate (7-1) is in sliding connection with the guide shoe base plate (5); the sliding of the wedge-shaped push plate (7-1) is driven by the first-stage pushing mechanism (7-3) having a dead point position; The wedge-shaped braking plate (7-2) is located on the side of the wedge-shaped push plate (7-1) close to the vertical guide rail (2); the side of the wedge-shaped push plate (7-1) facing the vertical guide rail (2) is an inclined downward slope; the side of the wedge-shaped braking plate (7-2) facing away from the vertical guide rail (2) is an inclined downward slope; the wedge-shaped braking plate (7-2) and the wedge-shaped push plate (7-1) are connected through the winding cable in the last-stage pulling mechanism (7-4). The last section pulling mechanism (7-4) comprises two pull ropes (7-4-1) and a winding assembly (7-4-2); the winding assembly (7-4-2) is installed on the wedge-shaped push plate (7-1); the two sides of the wedge-shaped push plate (7-1) are provided with winding holes; the wedge-shaped push plate (7-1) is provided with a winding channel in communication with the winding holes; one end of each of the two pull ropes (7-4-1) is fixed to the two sides of the wedge-shaped brake plate (7-2); the other end of each of the two pull ropes (7-4-1) penetrates the winding hole on the two sides of the wedge-shaped push plate (7-1) and is connected to the winding assembly (7-4-2) through the winding channel; the included angle between the inclined surface on the wedge-shaped push plate (7-1) and the vertical surface is 45° satisfies the following conditions: ； wherein, is the friction coefficient between the contact surface of the wedge-shaped push plate (7-1) and the wedge-shaped brake plate (7-2); a is the vertical distance between the connection point of the cable, the wedge-shaped brake plate (7-2) and the connection point of the cable, the wedge-shaped push plate (7-1) in the initial state; c is the horizontal distance when the connection point of the cable, the wedge-shaped brake plate (7-2) and the connection point of the cable, the wedge-shaped push plate (7-1) are at the same height; v is the cable winding line speed; t s is the braking time; When braking is needed, firstly, the first-stage pushing mechanism (7-3) drives the wedge-shaped push plate (7-1) to move towards the vertical guide rail (2) and reach the dead point position; then, the last-stage pulling mechanism (7-4) shortens the cable length between the wedge-shaped braking plate (7-2) and the wedge-shaped push plate (7-1), so that the wedge-shaped braking plate (7-2) is pulled upward and approaches the vertical guide rail (2) under the guidance of the slope until the wedge-shaped braking plate (7-2) contacts the vertical guide rail (2) to perform friction braking.

2. The retrofit elevator shoe device with a stall protection function according to claim 1, characterized in that: The first-stage pushing mechanism (7-3) comprises an eccentric wheel (7-3-1), a sleeve (7-3-2), a connecting rod (7-3-3) and a first-stage pushing motor; the eccentric position on the eccentric wheel (7-3-1) is rotatably connected to the guide shoe base plate (5); the sleeve (7-3-2) is rotatably connected to the outer circumferential surface of the eccentric wheel (7-3-1); one end of the connecting rod (7-3-3) is fixed to the sleeve (7-3-2); the other end of the connecting rod (7-3-3) is rotatably connected to the wedge-shaped push plate (7-1); when the rotation center of the eccentric wheel (7-3-1), the rotation center of the sleeve (7-3-2) and the rotation center between the connecting rod (7-3-3) and the wedge-shaped push plate (7-1) are in a straight line, the first-stage pushing mechanism (7-3) reaches the dead point position.

3. The retrofit elevator shoe device with a stall protection function according to claim 1, characterized in that: The beam frame (1) is in T shape; the vertical guide rail (2) and the composite guide shoe (3) each have three and correspond one by one; the three composite guide shoes (3) are respectively installed at the three end portions of the beam frame (1).

4. The retrofit elevator shoe device with a stall protection function according to claim 1, characterized in that: The cross section of the vertical guide rail (2) is in T shape and comprises a vertical guide plate (2-1) and a reinforcing rib (2-2); the reinforcing rib (2-2) is located in the middle of the side of the vertical guide plate (2-1) facing away from the beam frame (1); the side of the wedge-shaped braking plate (7-2) facing the vertical guide rail (2) is provided with a wear-resistant braking friction layer (7-5).

5. The retrofit elevator shoe device with a stall protection function according to claim 1, characterized in that: The guiding mechanism (6) comprises an opening and closing driving assembly and two single-side guiding assemblies; the single-side guiding assembly comprises a shoe plate (6-3), a shoe lining (6-5) and a roller supporting assembly; the shoe plates (6-3) of the two single-side guiding assemblies are driven to move close to or away from each other by the opening and closing driving assembly; edges of the shoe plates (6-3) are provided with flanges (6-4); the shoe linings (6-5) are fixed on inner sides of the flanges (6-4); the roller supporting assembly is installed on the shoe plate (6-3); the roller supporting assembly comprises a telescopic driving mechanism (6-6) and a shoe wheel (6-7); the shoe wheel (6-7) is driven by the telescopic driving mechanism (6-6) to move horizontally, close to or away from the shoe lining (6-5); the two single-side guiding assemblies are respectively matched with two side edges of the vertical guide rail (2); the shoe linings (6-5) in the corresponding single-side guiding assemblies are located between the shoe wheels (6-7) and the edges of the vertical guide rail (2).

6. A retrofitted elevator shoe device with stall protection according to claim 5, characterized in that: The shoe wheel (6-7) comprises an axle (6-7-1), a movable outer ring (6-7-2), permanent magnets (6-7-3), electromagnetic coils (6-7-4) and a fixed inner ring (6-7-5); the axle (6-7-1) is installed on the telescopic driving mechanism (6-6) and the fixed inner ring (6-7-5) is fixed on the axle (6-7-1); the fixed inner ring (6-7-5) is embedded with a plurality of electromagnetic coils (6-7-4) which are evenly distributed along the circumference of the fixed inner ring (6-7-5); the hollow movable outer ring (6-7-2) is coaxially sleeved on the outside of the fixed inner ring (6-7-5); the central hole of the movable outer ring (6-7-2) and the axle (6-7-1) form a rotating pair; the two side surfaces or one side surface of the movable outer ring (6-7-2) are embedded with a plurality of permanent magnets (6-7-3) which are evenly distributed along the circumference of the movable outer ring (6-7-2); the radial positions of the permanent magnets (6-7-3) and the electromagnetic coils (6-7-4) are matched.

7. The retrofit elevator shoe device with stall protection according to claim 5, wherein: The telescopic driving mechanism (6-6) comprises a first screw rod (6-6-2), a push rod (6-6-1) and a telescopic driving motor (6-6-3); the first screw rod (6-6-2) is rotatably connected in the mounting groove of the shoe plate (6-3); the push rod (6-6-1) and the sliding groove provided on the shoe plate (6-3) form a sliding pair; the inner end of the push rod (6-6-1) is provided with a threaded hole; the threaded hole on the push rod (6-6-1) and the first screw rod (6-6-2) form a screw pair; the shoe wheel (6-7) is installed on the outer end of the push rod (6-6-1).

8. A method of operating a retrofitted elevator shoe device with stall protection as defined in claim 5, characterized in that: The working method comprises an installation method and a braking method; The installation method is as follows: First, after the initial segment of vertical rail is installed manually, the opening and closing drive assembly drives the two single-sided guide assemblies away from each other; the vertical guide rail (2) is placed between the two single-sided guide assemblies; half of the guide shoe plate (6-3) of the single-sided guide assembly is sleeved on the installed guide rail, and the other half is inserted into the new guide rail; then, the opening and closing drive assembly drives the two single-sided guide assemblies to approach each other, so that the guide shoe plate (6-3) in the two single-sided guide assemblies clamps the two side edges of the vertical guide rail (2), and the upper and lower vertical guide rails (2) are aligned; Then, the initial segment pushing mechanism (7-3) drives the wedge-shaped push plate (7-1) and the wedge-shaped brake plate (7-2) to move towards the vertical guide rail (2); the final segment lifting mechanism (7-4) pulls the wedge-shaped brake plate (7-2), so that the wedge-shaped brake plate (7-2) needs to approach the vertical guide rail (2), until the vertical guide rail (2) is clamped by the wedge-shaped brake plate (7-2) and the flange (6-4) on the guide shoe plate (6-3), completing the positioning between the multiple vertical guide rails (2) and the multiple composite guide shoes; Finally, fix each vertical guide rail (2) to the elevator shaft; after the complete vertical guide rail is installed in sequence, connect the beam frame (1) with the bottom of the elevator car (4) to serve as a guide shoe; The braking method is as follows: Continuously detect the current value output by the electromagnetic coil (6-7-4); if the measured current value is greater than the preset current threshold, it is judged that the elevator is stalled; first, the initial segment pushing mechanism (7-3) and the final segment lifting mechanism (7-4) drive the wedge-shaped brake plate (7-2) to approach the vertical guide rail (2) in turn, and utilize the friction between the wedge-shaped brake plate (7-2) and the vertical guide rail (2) to brake.

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