Elevator safety guide device

Abstract

The application discloses an elevator safety guide device, which comprises a safety clamp frame, a clamp body assembly, a bolt assembly, a linkage shaft and a pull rod; the clamp body assembly comprises a U-shaped spring, symmetrically arranged roller assemblies, movable wedge assemblies and fixed wedges; the fixed wedges are fixed on the U-shaped spring through the bolt assembly; the roller assemblies are arranged between the fixed wedges and the movable wedge assemblies; the movable wedge assembly is composed of a movable wedge, a shoe lining and a wedge back plate; the movable wedge is horizontally movable relative to the shoe lining; the linkage shaft is connected with the shoe lining; when the elevator normally operates, the movable wedge and the shoe lining keep a certain gap with guide rails, so that the elevator car guiding function is realized; when the elevator is in emergency braking, the movable wedge protrudes from the surface of the shoe lining and clamps the guide rail, so that the elevator car braking function is realized.

Description

Technical Field

[0001] This invention relates to the field of elevators, and more specifically to an elevator safety guidance device. Background Technology

[0002] The elevator safety brake is a key component of the elevator safety protection system. It is typically fixed to the elevator car. When the elevator malfunctions and triggers the speed governor, the lifting mechanism pulls the safety brake wedge, causing it to clamp the elevator guide rails to brake the car. Improper clearance between the safety brake wedge and the guide rails (generally, the technical requirement is to control the clearance to be above 2mm) can cause the safety brake to malfunction.

[0003] During elevator ascent and descent, guide shoes, using nylon block linings between the car and guide rails, restrict relative movement between the two, thus guiding the elevator to run smoothly. The gap between the sliding shoe lining and the guide rail is very small; in extreme cases, it can be limited by rubber, rigid brackets, or bolts to ensure stable car operation and that the gap between the safety clamp wedge and the guide rail meets requirements, preventing malfunctions.

[0004] Most elevators have separate safety brakes and guide shoes, with the guide shoes located below the safety brake. The clearance between the safety brake wedge and the guide rail is generally smaller than the clearance between the guide shoe and the guide rail, making adjustment of the safety brake and guide shoe inconvenient and inaccurate. Due to wear on the guide shoe lining and extreme off-center loads on the elevator, the alignment of the safety brake wedge and guide shoe deteriorates, easily leading to guide rail rubbing or malfunction of the safety brake. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an integrated device that can achieve both guidance and emergency braking, so as to reduce the manufacturing and installation processes of components.

[0006] To solve the above-mentioned technical problems, the present invention provides an elevator safety guide device, comprising: a safety clamp frame, a clamp body assembly, a bolt assembly, a linkage shaft, and a lifting rod;

[0007] The clamp assembly includes a U-shaped spring, and symmetrically arranged roller assemblies, movable wedge assemblies, and fixed wedges; the fixed wedges are fixed to the U-shaped spring by bolt assemblies; the roller assemblies are disposed between the fixed wedges and the movable wedge assemblies.

[0008] The movable wedge assembly consists of a movable wedge, a boot liner, and a wedge back plate. The movable wedge can move horizontally relative to the boot liner, and the linkage shaft is connected to the boot liner.

[0009] When the elevator is running normally, the movable wedge and the shoe liner maintain a certain gap with the guide rail to realize the elevator car guiding function;

[0010] When the elevator brakes in an emergency, the movable wedge protrudes from the shoe liner surface and clamps the guide rail, thereby achieving the elevator car braking function.

[0011] Preferably, the boot liner has a through hole in the middle, and the movable wedge is composed of a brake block and a connecting plate, and the brake block can move horizontally in the through hole.

[0012] Preferably, the roller assembly consists of stepped rollers and a mounting plate; the wedge back plate has a longitudinal central groove in the middle, which penetrates the wedge back plate; the width of the central groove is greater than the width of the connecting plate, so that the connecting plate can pass through the wedge back plate and contact the rollers on the stepped rollers.

[0013] Preferably, the stepped roller has a retainer, multiple large rollers, and small rollers; the upper half of the stepped roller is provided with a combination of multiple large rollers and small rollers, the small rollers are nested inside the large rollers and are rotatably fixed on the retainer; the lower half of the stepped roller is provided with multiple small rollers, the small rollers being rotatably fixed on the retainer.

[0014] Preferably, the wedge back plate has a longitudinal through groove in the middle of the opposite side of the stepped roller. The width of the through groove is greater than the width of the large roller on the stepped roller, so that the large roller is accommodated in the through groove and the wedge back plate only contacts the small roller when it moves up and down.

[0015] Preferably, the elevator safety guide device further includes a linkage assembly, which includes two pairs of parallel links. The parallel links rotatably connect the fixed wedge and the wedge back plate, and the shoe liner is fixedly connected to the wedge back plate.

[0016] Preferably, the elevator safety guide device further includes a linkage assembly, which includes two pairs of parallel links. The parallel links rotatably connect the fixed wedge and the shoe liner, and the movable wedge is fixedly connected to the wedge back plate.

[0017] Preferably, the fixing wedge has a guide groove.

[0018] Compared with existing technologies, this invention employs a single device to handle both normal elevator operation and braking conditions. This reduces component manufacturing and installation processes, improves the accuracy of the brake wedge working surface and guide shoe liner working surface, enhances the alignment of guiding and braking components, prevents guide rail rubbing or brake malfunction, and improves the stability and safety of elevator operation. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the elevator safety guidance device in Example 1.

[0021] Figure 2 This is a schematic diagram of the elevator safety guide device after the safety clamp frame is hidden, as shown in Example 1.

[0022] Figure 3 This is an exploded view of the active wedge assembly structure in Embodiment 1.

[0023] Figure 4 This is a schematic diagram of the stepped roller structure of Example 1.

[0024] Figure 5 a is a schematic diagram of the elevator safety guide device during normal operation of the elevator in Example 1.

[0025] Figure 5 b is a schematic diagram of the elevator safety guide device status during emergency braking of the elevator in Example 1.

[0026] Figure 6 This is a schematic diagram of the elevator safety guidance device structure in Example 2.

[0027] Figure 7 This is a schematic diagram of the elevator safety guidance device structure in Example 3. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art. Example 1

[0029] like Figure 1 As shown, this embodiment provides an elevator safety guide device, including a safety clamp frame 1, a clamp body assembly 2, a bolt assembly 23, a linkage shaft 3, and a lifting rod 4. The clamp body assembly 2 is connected to the safety clamp frame 1 via the bolt assembly 23, and the linkage shaft 3 and the lifting rod 4 are fixedly connected.

[0030] like Figure 2As shown, the clamp assembly 2 includes a U-shaped spring 21, and symmetrically arranged roller assemblies 22, movable wedge assemblies, and fixed wedges 27. The fixed wedge 27 is fixed to the U-shaped spring by bolt assemblies 23. The roller assembly 22 is positioned between the fixed wedge 27 and the movable wedge assembly, and consists of stepped rollers 22a and a mounting plate 22b. The movable wedge assembly comprises a movable wedge 24, a shoe liner 25, and a wedge back plate 26, with the shoe liner 25 fixedly connected to the wedge back plate 26. The linkage shaft 3 is connected to the shoe liner 25. When the lifting rod 4 is lifted, it drives the linkage shaft 3 to rotate, lifting the movable wedge assembly to clamp the guide rail, thereby achieving the effect of braking the car.

[0031] The movable wedge 24 can move horizontally relative to the shoe liner 25. When the elevator is running normally, the movable wedge and the shoe liner maintain a certain gap with the guide rail to realize the elevator car guiding function. When the elevator brakes in an emergency, the movable wedge protrudes from the surface of the shoe liner and clamps the guide rail to realize the elevator car braking function.

[0032] like Figure 3 As shown, the more specific structure of the movable wedge assembly and its cooperation with the roller assembly 22 are as follows. The boot liner 25 has a through hole in the middle. The movable wedge 24 is composed of a brake block 241 and a connecting plate 242. The brake block 241 can move horizontally in the through hole. The brake block can be one or more pieces. In this embodiment, there are two pieces. The wedge back plate 26 has a longitudinal central groove 261 in the middle. The central groove 261 penetrates the wedge back plate 26. The width of the central groove 261 is greater than the width of the connecting plate 242, so that the connecting plate 242 can pass through the wedge back plate 26 and contact the rollers on the stepped roller 22a. The wedge back plate 26 and the opposite side of the stepped roller 22a have a longitudinal through groove 262 in the middle. The width of the through groove 262 is greater than the width of the large roller on the stepped roller 22a, so that the large roller is accommodated in the through groove 262. When the wedge back plate 26 moves up and down, it only contacts the small rollers.

[0033] The specific structure of the stepped roller 22a is as follows: Figure 4 As shown, the stepped roller 22a has a retainer 22a1, multiple large rollers 22a3, and small rollers 22a2. The upper half of the stepped roller 22a is provided with an assembly of multiple large rollers 22a3 and small rollers 22a2, with the small rollers 22a2 nested inside the large rollers 22a3 and rotatably fixed to the retainer 22a1; the lower half of the stepped roller 22a is provided with multiple small rollers 22a2, which are rotatably fixed to the retainer 22a1.

[0034] like Figure 5 a and Figure 5As shown in b, during normal elevator operation, the movable wedge assembly hangs down under gravity. The wedge back plate 26 contacts multiple small rollers 22a2 in the lower half of the stepped roller 22a, with the contact surface forming a preset acute angle with the guide rail surface. The shoe liner 25 and the brake block 241 do not contact the guide rail, maintaining a certain gap to achieve the car guiding function. When the elevator brakes in an emergency, the lifting rod 4 is lifted, driving the shoe liner 25 upward through the linkage shaft 3. At this time, the wedge back plate 26 contacts multiple small rollers 22a2 in the upper half of the stepped roller 22a, while the connecting plate 242 contacts the large roller 22a3, pushing the brake block 241 to move outward and protrude from the surface of the shoe liner 25. Finally, the brake block 241 clamps the guide rail, achieving the braking function. Example 2

[0035] like Figure 6 As shown, based on Embodiment 1, the elevator safety guide device further includes a linkage assembly 29, which includes two pairs of parallel links 29a and 29b, which rotatably connect the fixed wedge block 27 and the wedge block back plate 26.

[0036] During emergency braking, as the shoe liner 25 moves upward, the parallel connecting rods 29a and 29b ensure that the movable wedge 24 is vertically upward. The horizontal projection distance between the movable wedge 24 and the fixed wedge 27 increases, the gap between the movable wedge 24 and the guide rail decreases, and the horizontal displacement and upward displacement of the shoe liner 25 remain proportional. The movable wedge 24 protrudes from the working surface of the shoe liner 25 and gradually rubs against the guide rail to achieve braking.

[0037] Furthermore, a connecting rod pin and a guide groove can be provided between the fixed wedge 27 and the movable wedge assembly to gradually increase the ratio of horizontal displacement to upward displacement, while keeping the ratio of horizontal displacement to upward displacement of the shoe liner 25 constant. As the lifting assembly drives the shoe liner 25 to move upward, the gap between the movable wedge 24 and the guide rail decreases, and the working surface of the protruding shoe liner 25 gradually rubs against the guide rail to achieve braking. Example 3

[0038] like Figure 7 As shown, based on Embodiment 1, the elevator safety guide device further includes a linkage assembly 29, which includes two pairs of parallel links 29a and 29b. The parallel links rotatably connect the fixed wedge block 27 and the shoe liner 25. Another difference from Embodiment 1 is that in Embodiment 1, the shoe liner 25 is fixedly connected to the wedge block back plate 26, while in this embodiment, the movable wedge block 24 is fixedly connected to the wedge block back plate 26.

[0039] Examples 1 and 2 involve bringing the movable wedge 24 closer to the guide rail working surface relative to the shoe liner 25 during lifting. This example, however, moves the shoe liner 25 away from the guide rail working surface relative to the movable wedge 24 during lifting. This can be achieved by simply shifting the drive variation portion of the roller assembly 22 to the guide surface of the shoe liner 25, or by shifting the connecting rod assembly 29, connecting rod pin, and guide groove structure to the side of the shoe liner 25. Under braking conditions, the force on the movable wedge 24 is much greater than the normal force on the shoe liner 25, resulting in lower strength requirements for the drive structure on the shoe liner 25 and a correspondingly simpler structure.

[0040] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. An elevator safety guide device, characterized in that, include: Safety clamp frame, clamp body assembly, bolt assembly, linkage shaft, and lifting rod; The clamp assembly includes a U-shaped spring, and symmetrically arranged roller assemblies, movable wedge assemblies, and fixed wedges; the fixed wedges are fixed to the U-shaped spring by bolt assemblies; the roller assemblies are disposed between the fixed wedges and the movable wedge assemblies. The movable wedge assembly consists of a movable wedge, a boot liner, and a wedge back plate. The movable wedge can move horizontally relative to the boot liner, and the linkage shaft is connected to the boot liner. When the elevator is running normally, the movable wedge and the shoe liner maintain a certain gap with the guide rail to realize the elevator car guiding function; When the elevator brakes in an emergency, the movable wedge protrudes from the shoe liner surface and clamps the guide rail to achieve the elevator car braking function. The boot liner has a through hole in the middle, and the movable wedge is composed of a brake block and a connecting plate. The brake block can move horizontally in the through hole. The roller assembly consists of stepped rollers and a mounting plate; The wedge back plate has a longitudinal central groove in the middle, which penetrates the wedge back plate; the width of the central groove is greater than the width of the connecting plate, so that the connecting plate can pass through the wedge back plate and contact the rollers on the stepped rollers. The stepped roller has a retainer, multiple large rollers, and small rollers; The upper part of the stepped roller is provided with a combination of multiple large rollers and small rollers, wherein the small rollers are nested inside the large rollers and are rotatably fixed on the retainer. The lower half of the stepped roller is provided with multiple small rollers, which are rotatably fixed on the retainer. The wedge back plate has a longitudinal through groove in the middle of the opposite side of the stepped roller. The width of the through groove is greater than the width of the large roller on the stepped roller, so that the large roller is accommodated in the through groove and the wedge back plate only contacts the small roller when it moves up and down.

2. The elevator safety guide device according to claim 1, characterized in that, The elevator safety guide device also includes a linkage assembly, which includes two pairs of parallel links. The parallel links rotatably connect the fixed wedge and the wedge back plate, and the shoe liner is fixedly connected to the wedge back plate.

3. The elevator safety guide device according to claim 1, characterized in that, The elevator safety guide device also includes a linkage assembly, which includes two pairs of parallel links. The parallel links rotatably connect the fixed wedge and the shoe liner, and the movable wedge is fixedly connected to the wedge back plate.

4. The elevator safety guide device according to claim 1, characterized in that, The fixed wedge has a guide groove.

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