An ultra-low top floor height elevator traction gantry

Abstract

This invention relates to the field of elevator engineering and discloses an ultra-low top-floor height elevator traction gantry, including an outer frame. A car and a counterweight are disposed inside the outer frame. A car guide rail and a counterweight guide rail are fixedly connected to the inner wall of the outer frame. The car and the counterweight are slidably connected to the car guide rail and the counterweight guide rail, respectively. The traction machine and steel wire rope are also included. The traction machine drives the car and the counterweight to rise and fall via the steel wire rope. A mounting plate is fixedly connected to the inner wall of the outer frame near the upper part, and the traction machine is fixedly connected to the upper surface of the mounting plate. In this invention, by shifting the traction machine from directly above the car to directly above the counterweight, and ensuring that its horizontal projection does not overlap with the car, the traction machine's occupation of the car's top space is completely eliminated. Combined with an optimized shaft layout, the minimum required top-floor height of the elevator can be reduced to 2600mm, significantly expanding the elevator's applicable scenarios.

Description

Technical Field

[0001] This invention relates to the field of elevator engineering, and in particular to an elevator traction gantry with an ultra-low top floor height. Background Technology

[0002] An elevator traction gantry is an elevator system that combines traction drive and gantry structure. Its core is to achieve the traction and braking of the car through the friction between the traction sheave of the traction machine and the steel wire rope. Traditional elevator gantry adopts a ceiling-mounted structure with the traction machine fixed in the center of the upper beam that spans the top of the outer frame and is located directly above the car.

[0003] The traditional structure has the following drawbacks: the height of the upper beam itself is about 300-500mm, and when combined with the height of the traction machine itself, the safety clearance at the top of the car, the height of the car top guardrail, and the necessary maintenance and operation space, the elevator's requirement for the height of the building's top floor is generally higher than 3800-4500mm. However, the elevator shafts of many old residential areas and self-built villas currently have a reserved top floor height of only 2600-3000mm, which cannot meet the installation requirements of the traditional gantry frame and limits the application of elevators in the above-mentioned scenarios.

[0004] In addition, the traction ratio of existing elevator traction systems is usually a fixed value, which cannot be flexibly adjusted according to on-site load requirements and shaft conditions, resulting in poor versatility. Summary of the Invention

[0005] To overcome the above shortcomings, the present invention provides an elevator traction gantry with an ultra-low top floor height, which aims to improve the problem of insufficient reserved space at the top floor in the prior art, making it difficult to install traditional gantry frames.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an ultra-low top-floor height elevator traction gantry, comprising an outer frame, wherein a car and a counterweight are disposed inside the outer frame, and a car guide rail and a counterweight guide rail are fixedly connected to the inner wall of the outer frame, wherein the car is slidably connected to the car guide rail, and the counterweight is slidably connected to the counterweight guide rail, and further comprising a traction machine and a steel wire rope, wherein the traction machine drives the car and the counterweight to rise and fall through the steel wire rope, wherein a mounting plate is fixedly connected to the inner wall of the outer frame near the upper part, and the traction machine is fixedly connected to the upper surface of the mounting plate, and the traction machine is located directly above the counterweight, wherein the horizontal projection of the traction machine and the horizontal projection of the car do not overlap.

[0007] Furthermore, a bracket is fixedly connected above the mounting plate, and a pressure roller is rotatably connected to the inner wall of the bracket. The wire rope passes through the pressure roller and the mounting plate and is connected to the traction wheel of the traction machine.

[0008] Furthermore, a top plate is fixedly connected to the top of the outer frame, and at least one top guide wheel is provided on the lower surface of the top plate. The top guide wheel is fixedly connected to the lower surface of the top plate through a wheel frame, and the steel wire rope passes around the top guide wheel.

[0009] As an optional improvement to the above technical solution, the ultra-low top floor height elevator traction gantry also includes a switchable traction ratio mechanism. The switchable traction ratio mechanism includes a height control component one disposed on the top of the counterweight, a height control component two disposed on the top of the car, and two end connectors fixedly connected to both ends of the wire rope. The second height control component includes an assembly plate, which is fixedly connected to the upper surface of the car. A connection port for fixing the end connector is provided at the middle of the right end of the assembly plate. A slide rail is fixedly connected to the upper surface of the assembly plate. A slide rail is fixedly connected to the upper surface of the car located on the right side of the assembly plate. A mounting bracket is slidably connected to the outer wall of the slide rail. A car return rope wheel is rotatably connected to the inner wall of the mounting bracket. A mounting bracket is slidably connected to the outer wall of the slide rail. A car return rope wheel is rotatably connected to the inner wall of the mounting bracket.

[0010] Furthermore, the first car return rope pulley and the second car return rope pulley are at the same horizontal height.

[0011] Furthermore, when the second mounting bracket slides to the rightmost end, the distance between its left surface and the right surface of the assembly plate is greater than the length of the end connector.

[0012] Furthermore, the height control component includes a connecting frame, the lower surface of which is fixedly connected to the top of the counterweight, the upper surface of which has a connecting area for fixing the end connector, and a rotating wheel rotatably connected to the inner side of the connecting frame, the inner wall of which has a through groove for the end connector to pass through.

[0013] Furthermore, the through groove extends radially through the rotating wheel and passes through the central axis of the rotating wheel. The width of the through groove is greater than the maximum external dimension of the end connector, so that the end connector can pass smoothly through the through groove.

[0014] Furthermore, a top plate is fixedly connected to the top of the outer frame, and at least one top guide wheel is provided on the lower surface of the top plate. The middle diameter of the second car return rope wheel is smaller than the edge diameter. The distance between the right end cross-section of the smallest middle diameter of the second car return rope wheel and the leftmost end cross-section of the leftmost top guide wheel is the same as the diameter of the wire rope.

[0015] The present invention has the following beneficial effects: 1. In this invention, by moving the traction machine from directly above the car to directly above the counterweight, and ensuring that its horizontal projection does not overlap with the car, the traction machine's occupation of the car's top space is completely eliminated. Combined with an optimized shaft layout, this solution can reduce the minimum top floor height required for the elevator to 2600mm, perfectly adapting to low-top shafts in old residential areas, self-built villas, etc., and significantly expanding the applicable scenarios of the elevator.

[0016] 2. In this invention, by setting a sliding car return rope pulley, a counterweight pulley with a through groove, and a detachable end connector, this system can quickly switch between 2:1 and 1:1 traction ratios without replacing the core components. The 2:1 traction ratio is suitable for heavy load and low speed scenarios, while the 1:1 traction ratio is suitable for light load and high speed scenarios, which can better meet the personalized needs of different users. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the overall structure in this invention; Figure 2 In this invention Figure 1 Enlarged schematic diagram of the three-dimensional structure of part A in the middle; Figure 3 This is a three-dimensional structural diagram of the car and its top structure in this invention; Figure 4 This is a three-dimensional structural diagram of the wire rope end and end connector in this invention; Figure 5 This is a three-dimensional structural diagram of the top region of the counterweight in this invention; Figure 6 This is a schematic diagram of the traction ratio 2:1 winding in this invention; Figure 7 This is a schematic diagram of a traction ratio of 1:1 winding in this invention.

[0018] Legend: 1. Outer frame; 2. Car; 3. Car guide rail; 4. Counterweight guide rail; 5. Counterweight block; 6. Mounting plate; 7. Traction machine; 8. Bracket; 9. Pressure roller; 10. Wire rope; 11. Height control component one; 12. Height control component two; 13. End connector; 121. Assembly plate; 122. Connection port; 123. Slide rail one; 124. Slide rail two; 125. Mounting frame one; 126. Car return rope wheel one; 127. Mounting frame two; 128. Car return rope wheel two; 111. Connecting frame; 112. Connecting area; 113. Rotary wheel; 114. Through slot; 14. Top plate; 15. Top guide wheel. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Reference Figure 1 and Figure 2 The present invention provides an embodiment of an ultra-low top floor height elevator traction gantry, comprising an outer frame 1, an inner car 2 and a counterweight 5, the car 2 being a passenger or cargo container, the inner wall of the outer frame 1 being fixedly connected to a car guide rail 3 and a counterweight guide rail 4, the car 2 being slidably connected to the car guide rail 3, the car guide rail 3 being used to limit the movement trajectory of the car 2, and the counterweight 5 being slidably connected to the counterweight guide rail 4, the counterweight guide rail 4 being used to limit the sliding trajectory of the counterweight 5.

[0021] Reference Figure 1 , Figure 2 , Figure 6 and Figure 7 It also includes a traction machine 7 and a steel wire rope 10. The traction machine 7 drives the car 2 and the counterweight 5 to rise and fall through the steel wire rope 10. The inner wall of the outer frame 1 near the upper part is fixedly connected to a mounting plate 6. The traction machine 7 is fixedly connected to the upper surface of the mounting plate 6. The traction machine 7 is set directly above the counterweight 5. The horizontal projection of the traction machine 7 does not overlap with the horizontal projection of the car 2. By setting the position of the traction machine 7, the occupation of the top space of the car 2 by the traction machine 7 is eliminated, ensuring that the minimum top floor height required by the elevator can be reduced to 2600mm, expanding the applicable scenarios of the elevator. A bracket 8 is fixedly connected above the mounting plate 6. A pressure roller 9 is rotatably connected to the inner wall of the bracket 8. The steel wire rope 10 passes between the pressure roller 9 and the mounting plate 6. The pressure roller 9 applies pressure to the steel wire rope 10 to compress it. The steel wire rope 10 is connected to the traction wheel of the traction machine 7. The traction wheel of the traction machine 7 pulls the steel wire rope 10 through friction, driving the car to move up and down.

[0022] Reference Figure 1 , Figure 2 , Figure 6 and Figure 7 The top of the outer frame 1 is fixedly connected to the top plate 14. At least one top guide wheel 15 is provided on the lower surface of the top plate 14. The top guide wheel 15 is fixedly connected to the lower surface of the top plate 14 through a wheel frame. The top guide wheel 15 is rotatably connected to the inner wall of the wheel frame. The wire rope 10 passes around the top guide wheel 15. The top guide wheel 15 is used to provide support force at the corner of the wire rope 10.

[0023] Reference Figure 4 , Figure 6 and Figure 7It also includes a switchable traction ratio mechanism, which allows staff to quickly switch between 1:1 and 2:1 traction ratios without replacing core components. The switchable traction ratio mechanism includes a height control component 11 located at the top of the counterweight 5, a height control component 2 12 located at the top of the car 2, and two end connectors 13 fixedly connected to both ends of the wire rope 10. The two end connectors 13 cooperate with the height control component 11 and the height control component 2 12 respectively to realize the lifting control of the car 2 and the counterweight 5.

[0024] Reference Figure 1 and Figure 5 The height control component 11 includes a connecting frame 111. The lower surface of the connecting frame 111 is fixedly connected to the top of the counterweight 5. The upper surface of the connecting frame 111 has a connecting area 112 for fixing the end connector 13. The connecting area 112 matches the shape and size of the end connector 13. A rotating wheel 113 is rotatably connected to the inner side of the connecting frame 111. The inner wall of the rotating wheel 113 has a through groove 114 for the end connector 13 to pass through. The through groove 114 passes radially through the rotating wheel 113 and through its central axis. The diameter of the through groove 114 is larger than the outer diameter of the end connector 13.

[0025] Reference Figure 1 and Figure 3The height control component 2 12 includes an assembly plate 121, which is fixedly connected to the upper surface of the car 2. The assembly plate 121 is located on the upper surface of the left half of the car 2. A connection port 122 for fixing the end connector 13 is opened in the middle of the right end of the assembly plate 121. A slide rail 123 is fixedly connected to the upper surface of the assembly plate 121. A slide rail 2 124 is fixedly connected to the upper surface of the car 2 on the right side of the assembly plate 121. A mounting bracket 125 is slidably connected to the outer wall of the slide rail 123. A rectangular protrusion is provided on the front and rear sides of the mounting bracket 125 near the bottom. When the mounting bracket 125 slides to the appropriate position, the operator uses bolts to fix it to the assembly plate 121 through the rectangular protrusion area of ​​the mounting bracket 125. A car return rope wheel 126 is rotatably connected to the inner wall of the mounting bracket 125. Mounting bracket 2 127 is slidably connected to the outer wall of 4. Rectangular protrusions are provided on the front and rear sides of mounting bracket 2 near the bottom. The operator uses bolts to fix the mounting bracket 2 to the car 2 through the rectangular protrusion area. When mounting bracket 2 127 slides to the rightmost end, the distance between its left surface and the right surface of the assembly plate 121 is greater than the length of the end connector 13. The inner wall of mounting bracket 2 127 is rotatably connected to car return rope wheel 2 128. Car return rope wheel 1 126 and car return rope wheel 2 128 are at the same horizontal height to ensure that the force applied to the left and right sides of the car 2 is consistent. The middle diameter of car return rope wheel 2 128 is smaller than the edge diameter. The distance between the right end cross-section of the smallest middle diameter of car return rope wheel 2 128 and the leftmost end cross-section of the leftmost top guide wheel 15 is consistent with the diameter of the wire rope 10 to ensure that the wire rope 10 is set vertically.

[0026] Working principle: This invention achieves rapid switching between 1:1 and 2:1 traction ratios by changing the fixing point and winding path of the wire rope without replacing any core components. The specific operation is as follows: If a traction ratio of 2:1 is required, the worker will install one of the end connectors 13 on the top plate 14 near the left side. Then, the wire rope 10 will be passed around the car return rope sheave 126 and the car return rope sheave 2 128, and while keeping it vertical, it will be wrapped around the top guide wheel 15. Then, it will be placed under the pressure wheel 9 in the area below the rightmost top guide wheel 15. The wire rope 10 will be placed in the area to the right of the pressure wheel 9 and pass through the traction machine 7. After passing through the area of ​​the traction machine 7 and being wrapped around the outside of the wheel 113, the other end connector 13 will be fixed to the lower part of the mounting plate 6.

[0027] At this time, since there is an end connector 13 on the left and right sides of the wheel 113, the first return rope wheel 126 and the second return rope wheel 128, the distance that the wire rope 10 moves after the traction machine 7 starts is half the distance that the car 2 and the counterweight 5 move, thus achieving a traction ratio of 2:1.

[0028] If a traction ratio of 1:1 is required, the worker will pass one end connector 13 through the through slot 114 and fix it in the connection area 112. Then, the wire rope 10 will pass through the traction machine 7 and, after passing over the pressure wheel 9 and the top guide wheel 15, the other end connector 13 will be fixed in the connection port 122.

[0029] After the operation is completed, move the car return rope pulley 126 and the car return rope pulley 2 128 towards the area closer to the center, so that the wire rope 10 passes between the car return rope pulley 126 and the car return rope pulley 2 128, ensuring that the wire rope 10 does not become non-vertical due to the end connector 13. The entire switching process only requires adjusting the position of the return rope pulley and the end fixing point of the wire rope, without disassembling any core structure.

[0030] Since the steel wire ropes 10 connected to the car 2 and the counterweight 5 are all single strands, a traction ratio of 1:1 can be achieved. Therefore, different traction ratios can be selected according to the required requirements and the installation can be carried out accordingly.

[0031] Since the projection of the traction machine 7 does not overlap with the car 2, the traction machine 7 will not occupy the top space of the car 2, thus saving top space and achieving the effect of ultra-low top height.

[0032] This invention frees up all the space at the top of the car by relocating the traction machine directly above the counterweight. This naturally adapts to a top-mounted car suspension structure, with the entire car weight borne by the top wire rope system. The car floor eliminates the need for heavy bottom load-bearing beams and guide mechanisms, significantly reducing its thickness. Combined with an optimized buffer design, this allows for a shallow pit installation of up to 100mm, far superior to the traditional elevator requirement of over 300mm. Furthermore, this solution simultaneously meets the dual requirements of a low top floor and a shallow pit, addressing the industry pain point that existing technologies can only satisfy one of these requirements. The optimized shaft space also allows for the use of a composite counterweight structure combining concrete and steel plates, reducing material costs while meeting balance requirements. This makes it particularly suitable for small-space shaft scenarios such as home elevators and renovations in older residential areas, significantly enhancing the product's market competitiveness.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A traction gantry for an elevator with an ultra-low top floor height, comprising an outer frame (1), wherein a car (2) and a counterweight (5) are disposed inside the outer frame (1), and a car guide rail (3) and a counterweight guide rail (4) are fixedly connected to the inner wall of the outer frame (1), wherein the car (2) is slidably connected to the car guide rail (3), and the counterweight (5) is slidably connected to the counterweight guide rail (4), and further comprising a traction machine (7) and a wire rope (10), wherein the traction machine (7) drives the car (2) and the counterweight (5) to rise and fall through the wire rope (10), characterized in that: The outer frame (1) is fixedly connected to the inner wall near the top with a mounting plate (6), the traction machine (7) is fixedly connected to the upper surface of the mounting plate (6), and the traction machine (7) is located directly above the counterweight (5). The horizontal projection of the traction machine (7) does not overlap with the horizontal projection of the car (2).

2. The elevator traction gantry frame with ultra-low top floor height according to claim 1, characterized in that: A bracket (8) is fixedly connected above the mounting plate (6), and a pressure wheel (9) is rotatably connected to the inner wall of the bracket (8). The wire rope (10) passes between the pressure wheel (9) and the mounting plate (6) and is connected to the traction wheel of the traction machine (7) for transmission.

3. The elevator traction gantry frame with ultra-low top floor height according to claim 1, characterized in that: The top of the outer frame (1) is fixedly connected to a top plate (14), and at least one top guide wheel (15) is provided on the lower surface of the top plate (14). The top guide wheel (15) is fixedly connected to the lower surface of the top plate (14) through a wheel frame, and the wire rope (10) passes around the top guide wheel (15).

4. The elevator traction gantry frame with ultra-low top floor height according to claim 1, characterized in that: It also includes a switchable traction ratio mechanism, which includes a height control component one (11) set on the top of the counterweight (5), a height control component two (12) set on the top of the car (2), and two end connectors (13) fixedly connected to both ends of the wire rope (10).

5. The elevator traction gantry frame with ultra-low top floor height according to claim 4, characterized in that: The height control component 2 (12) includes an assembly plate (121), which is fixedly connected to the upper surface of the car (2). The middle right end of the assembly plate (121) has a connection port (122) for fixing the end connector (13). The upper surface of the assembly plate (121) is fixedly connected to a slide rail 1 (123). The upper surface of the car (2) located on the right side of the assembly plate (121) is fixedly connected to a slide rail 2 (124). The outer wall of the slide rail 1 (123) is slidably connected to a mounting bracket 1 (125). The inner wall of the mounting bracket 1 (125) is rotatably connected to a car return rope wheel 1 (126). The outer wall of the slide rail 2 (124) is slidably connected to a mounting bracket 2 (127). The inner wall of the mounting bracket 2 (127) is rotatably connected to a car return rope wheel 2 (128).

6. The elevator traction gantry frame with ultra-low top floor height according to claim 5, characterized in that: The first car return rope wheel (126) and the second car return rope wheel (128) are at the same horizontal level.

7. The elevator traction gantry frame with ultra-low top floor height according to claim 5, characterized in that: When the second mounting bracket (127) slides to the rightmost end, the distance between its left surface and the right surface of the mounting plate (121) is greater than the length of the end connector (13).

8. The elevator traction gantry frame with ultra-low top floor height according to claim 4, characterized in that: The height control component (11) includes a connecting frame (111), the lower surface of which is fixedly connected to the top of the counterweight (5), the upper surface of which is provided with a connecting area (112) for fixing the end connector (13), and a rotating wheel (113) is rotatably connected to the inner side of the connecting frame (111), and the inner wall of the rotating wheel (113) is provided with a through groove (114) for the end connector (13) to pass through.

9. The elevator traction gantry frame with ultra-low top floor height according to claim 8, characterized in that: The through groove (114) passes radially through the rotating wheel (113) and through the central axis of the rotating wheel (113). The width of the through groove (114) is greater than the maximum external dimension of the end connector (13), so that the end connector (13) can pass smoothly through the through groove (114).

10. The elevator traction gantry frame with ultra-low top floor height according to claim 5, characterized in that: The top of the outer frame (1) is fixedly connected to a top plate (14). At least one top guide wheel (15) is provided on the lower surface of the top plate (14). The middle diameter of the second car return rope wheel (128) is smaller than the edge diameter. The distance between the right end of the smallest diameter of the middle part of the second car return rope wheel (128) and the leftmost end of the leftmost top guide wheel (15) is the same as the diameter of the wire rope (10).

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