A high traction ratio freight elevator traction system

Abstract

This utility model discloses a high traction ratio traction system for a freight elevator, including steel wire ropes, a counterweight anti-rope mechanism configured on the counterweight assembly, a car anti-rope mechanism set on the top of the car frame, and a traction guide mechanism arranged in the machine room. The traction guide mechanism is characterized by being mounted on a support beam and comprising: a traction machine, a counterweight guide wheel assembly corresponding to the counterweight anti-rope mechanism, and a car guide wheel assembly corresponding to the car anti-rope mechanism; the car guide wheel assembly includes a left rope wheel assembly, a middle rope wheel assembly, and a right rope wheel assembly, wherein the middle rope wheel assembly has a 4:1 traction ratio. It features a high traction ratio, achieving heavy-load lifting while reducing the load on the traction machine; the integrated design of the main and auxiliary gantry frames enhances the rigidity of the car frame, distributes stress, stabilizes the structure, and avoids uneven loading of the car; the counterweight and car guide wheel assemblies are vertically aligned, resulting in a clear structure, reducing steel wire rope wear, optimizing the layout, and saving horizontal space in the machine room; the double protection of the guard and rope retainer reduces operational risks and ensures safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, and in particular to a traction system for freight elevators with large load capacity and high lifting efficiency, which achieves stable and reliable cargo transportation by optimizing the traction ratio and structural layout. Background Technology

[0002] Heavy-duty freight elevators not only need to meet the working conditions themselves, but also need to consider the stability of the car frame when vehicles or goods enter, as well as the possibility that users may place the loaded goods on one side of the car during elevator operation.

[0003] Traditional freight elevator traction systems often employ low traction ratios, making it difficult to meet the demands of heavy loads and high lifting conditions. Furthermore, existing traction systems often feature loose structures and complex wire rope windings, leading to uneven stress distribution and increased vibration. In addition, insufficient car frame structural strength affects long-term operational stability, while the use of excessively large steel components increases weight, raising costs and shortening service life. Therefore, there is an urgent need for a compact, high-traction-ratio, and stress-balanced freight elevator traction system. Summary of the Invention

[0004] The purpose of this invention is to solve the above problems and provide a high traction ratio freight elevator traction system. It features a multi-rope pulley group cooperative layout and a zoned traction design to achieve a high traction ratio while improving system rigidity and stability.

[0005] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a traction system for a freight elevator with a large traction ratio, including steel wire rope, a counterweight anti-rope mechanism configured on the counterweight assembly, a car anti-rope mechanism set on the top of the car frame, and a traction guide mechanism arranged in the machine room, characterized in that the traction guide mechanism is set on the support beam and includes: a traction machine, a counterweight guide wheel assembly corresponding to the counterweight anti-rope mechanism, and a car guide wheel assembly corresponding to the car anti-rope mechanism; the car guide wheel assembly includes a left rope wheel assembly, a middle rope wheel assembly, and a right rope wheel assembly, wherein the middle rope wheel assembly cooperates with the car anti-rope mechanism on the top of the car frame to form a 4:1 traction ratio.

[0006] In the aforementioned high traction ratio freight elevator traction system, preferably, the car frame is provided with a main gantry frame centered on the middle part of the car depth, and auxiliary gantry frames are symmetrically provided at both ends of the car with the main gantry frame as the center. The main gantry frame and the auxiliary gantry frames are connected into an integrated structure. Both the main gantry frame and the auxiliary gantry frames are provided with top beams, and the car anti-rope mechanism is located in the top beams.

[0007] In the aforementioned high traction ratio freight elevator traction system, preferably, the car anti-rope mechanism in the main gantry corresponds to the middle rope wheel group of the car guide wheel group, and the car anti-rope mechanisms in the two auxiliary gantry are respectively coordinated with the left rope wheel group and the right rope wheel group.

[0008] In the aforementioned high traction ratio freight elevator traction system, preferably, one end of the wire rope is fixed in the machine room and first forms a 4:1 traction ratio through the car anti-rope mechanism and the middle rope sheave group in the main gantry; then it is wound around to the left rope sheave group, the right rope sheave group, and the car anti-rope mechanism in the auxiliary gantry.

[0009] In the aforementioned high traction ratio freight elevator traction system, preferably, two guide rope pulleys are respectively provided in the car anti-rope mechanism in the main gantry, the car anti-rope mechanism in the secondary gantry, the left rope pulley group, the middle rope pulley group, and the right rope pulley group.

[0010] In the aforementioned high traction ratio freight elevator traction system, preferably, the counterweight anti-rope mechanism is provided with a number of guide rope wheels, and the number of guide rope wheels in the counterweight guide wheel group is one less than the number of guide rope wheels in the counterweight anti-rope mechanism; the counterweight guide wheel group is arranged directly above the counterweight anti-rope mechanism.

[0011] In the aforementioned high traction ratio freight elevator traction system, preferably, both ends of the wire rope are positioned on the machine room support beam by rope end assemblies.

[0012] In the aforementioned high traction ratio freight elevator traction system, preferably, a tensioning guide wheel is provided below the traction machine, and the tensioning guide wheel is equipped with a rope retainer.

[0013] In the aforementioned high traction ratio freight elevator traction system, preferably, all sheave groups in the car anti-rope mechanism and car guide sheave group are equipped with sheave guards; and a rope guard is provided at the configured guide sheave.

[0014] This technical solution utilizes a traditional traction machine to drive the wire ropes. The counterweight guide pulley group corresponds to the counterweight anti-rope mechanism. The car guide pulley group is divided into left, middle, and right rope pulley groups. The middle rope pulley group, in conjunction with the car anti-rope mechanism at the top of the car frame, forms a 4:1 traction ratio, distributing a larger portion of the wire rope force to the center of gravity of the car frame and car. The car frame adopts an integrated main and auxiliary gantry structure. The main gantry is located in the middle of the car depth, and its top beam houses the car anti-rope mechanism corresponding to the middle rope pulley group. As the center of the car frame and car, it bears the main weight of the elevator. The auxiliary gantry is symmetrically located at both ends of the car, and its top beam houses anti-rope mechanisms that cooperate with the left and right rope pulley groups respectively. This ensures overall balance for elevators with long cars and heavy loads. Simultaneously, the auxiliary gantry distributes other traction ratios, expanding the distribution methods for large traction ratios.

[0015] The wire rope of this device is wound along the following path: one end is fixed to the machine room, and it passes through the main gantry anti-rope mechanism → middle rope pulley group to form a 4:1 traction ratio. Then it extends to the left / right rope pulley group → corresponding secondary gantry anti-rope mechanism, and is finally fixed to the machine room support beam. All anti-rope mechanisms and rope pulley groups are equipped with double guide rope pulleys to ensure that the moving parts are subjected to balanced forces.

[0016] Furthermore, a tensioning guide wheel and a rope guard are installed below the traction machine to adjust the local displacement direction of the wire rope according to actual conditions, while preventing the wire rope from derailing. Each sheave assembly and the reversing mechanism are equipped with sheave guards and rope guards, improving safety.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: by combining the 4:1 design of the middle rope pulley group with the load distribution of the left and right rope pulley groups, a large traction ratio of over 8:1 is obtained, which can reduce the load of the traction machine while lifting heavy loads; the integrated design of the main and auxiliary gantry frames enhances the rigidity of the car frame, distributes the force, stabilizes the structure, and avoids uneven loading of the car; the counterweight and car guide pulley groups are vertically aligned, with a clear structure, reducing wire rope wear, optimizing the layout, and saving horizontal space in the machine room; the double protection of the protective cover and the rope guard frame reduces the operational risk and ensures safety and reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a shaft application state structure according to this utility model.

[0019] Figure 2 This is a front view of a traction guide mechanism according to this utility model.

[0020] Figure 3 yes Figure 2 Top view.

[0021] Figure 4 This is a schematic diagram of a combination structure of a car and a car frame according to this utility model.

[0022] Figure 5 yes Figure 4 Top view.

[0023] Figure 6 yes Figure 4 The right view.

[0024] Figure 7 This is a schematic diagram of a wire rope winding method and length calculation structure according to this utility model.

[0025] In the diagram: 1-Traction guide mechanism, 101-Traction machine, 102-Counterweight guide pulley assembly, 103-Right rope pulley assembly, 104-Left rope pulley assembly, 105-Middle rope pulley assembly, 106-First rope head assembly, 107-Second rope head assembly, 108-Tensioning guide pulley, 2-Car, 3-Car frame, 301-Top beam, 302-Car guide rope pulley, 4-Counterweight assembly, 5-Wire rope. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0027] See Figure 1 This embodiment provides a high traction ratio freight elevator traction system, including a counterweight anti-rope mechanism configured on the counterweight assembly 4, a car anti-rope mechanism set on the top of the car frame 3, and a traction guide mechanism 1 arranged in the machine room. The above mechanisms are combined into an elevator traction system with a high traction ratio of 8:1 by steel wire rope 5 winding around the guide rope wheel, which can meet the needs of large freight elevators such as cars for product transfer in industrial enterprises.

[0028] The traction guiding mechanism 1 is installed on the support beam in the machine room. The traction guiding mechanism 1 includes a traction machine 101, such as... Figure 2 , Figure 3 As shown, a tensioning guide wheel 108 is provided below the traction machine 101, and the tensioning guide wheel 108 is equipped with a rope guide frame. A counterweight guide wheel assembly 102 corresponds to the counterweight anti-rope mechanism, and a car guide wheel assembly corresponds to the car anti-rope mechanism. The car guide wheel assembly includes a left rope wheel assembly 104, a middle rope wheel assembly 105, and a right rope wheel assembly 103. The middle rope wheel assembly 105 cooperates with the car anti-rope mechanism in the car frame 3 (main gantry frame) to form a 4:1 traction ratio. The guide wheel assemblies are arranged vertically, such as the counterweight guide wheel assembly 102, which is positioned on one side of the hoistway corresponding to the counterweight assembly 4, to ensure that the counterweight guide wheel assembly is directly above the counterweight anti-rope mechanism. The counterweight guide wheel assembly 102 has three guide wheels arranged in a straight line, corresponding to four guide wheels in the counterweight anti-rope mechanism. The left sheave group 104, the middle sheave group 105, and the right sheave group 103 are each equipped with two guide sheaves. The guide sheaves in the left sheave group 104 and the right sheave group 103 are parallel, and the guide sheave in the middle sheave group 105 is arranged perpendicular to the guide sheaves in the left sheave group 104 and the right sheave group 103.

[0029] Car frame 3 is equipped with the main gantry frame centered on the middle part of the car depth, see [reference]. Figure 4 , Figure 5 , Figure 6 Auxiliary gantry frames are symmetrically arranged at both ends of the car, with the main gantry frame as the center. The main gantry frame and the auxiliary gantry frames are connected into a single structure. Both the main gantry frame and the auxiliary gantry frames are equipped with a top beam 301, which is composed of two parallel channel steels. The guide rope pulleys of the car's anti-rope mechanism are all located in the top beam. Each top beam 301 has two car guide rope pulleys 302, that is, two car guide rope pulleys 302 form a group.

[0030] Furthermore, the car anti-rope mechanism in the main gantry corresponds to the middle rope wheel assembly 105 of the car guide wheel assembly, and the car anti-rope mechanisms in the two auxiliary gantry frames correspond to and cooperate with the left rope wheel assembly 104 and the right rope wheel assembly 103, respectively.

[0031] All the sheave groups in the aforementioned car anti-rope mechanism and car guide sheave group are equipped with sheave guards, and a rope guard is provided at the configured guide sheave position.

[0032] The winding method of wire rope 5 is as follows: Figure 7 As shown, the two ends of the wire rope 5 are positioned on the support beam of the machine room by rope head assemblies. The two rope head assemblies are the first rope head assembly 106 and the second rope head assembly 107, wherein the first rope head assembly 106 is near the rope pulley group 105, and the second rope head assembly 107 is near the counterweight guide pulley group 102.

[0033] Starting from the first rope head assembly 106, the wire rope 5 first passes through the two car guide rope pulleys 302 in the main gantry and the two guide rope pulleys in the middle rope pulley group 105 of the car anti-rope mechanism in the main gantry, respectively, to form a 4:1 traction ratio; then it passes through the two guide rope pulleys of the left rope pulley group 104 once and then passes down through the two guide rope pulleys in the left auxiliary gantry in one go, forming a 2:1 traction ratio; then the wire rope 5 returns to the right rope pulley group 103, passes through the two guide rope pulleys, and passes down through the two guide rope pulleys in the right auxiliary gantry in one go, forming a 2:1 traction ratio; a total traction ratio of 8:1 is obtained. After passing through the two guide pulleys of the right auxiliary gantry, the wire rope 5 is led upward to the traction machine 101, and continues downward through the tension guide pulley 108 to the counterweight assembly 4. It winds back and forth between the four guide pulleys in the counterweight assembly 4 and the three guide pulleys in the counterweight guide pulley group 102, and finally ends its positioning at the second rope end assembly 107.

[0034] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any equivalent changes or modifications made in accordance with the technical concept proposed by the present invention without departing from the principles of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A large-drag-ratio cargo elevator hoisting system comprising a steel wire rope (5), a counterweight rope-reversing mechanism arranged on a counterweight assembly (4), a car rope-reversing mechanism arranged on top of a car frame (3), and a hoisting guide mechanism (1) arranged in a machine room, characterized in that The traction guide mechanism (1) is installed on the support beam and includes: a traction machine (101), a counterweight guide wheel group (102) corresponding to the counterweight anti-rope mechanism, and a car guide wheel group corresponding to the car anti-rope mechanism; the car guide wheel group includes a left rope wheel group (104), a middle rope wheel group (105) and a right rope wheel group (103), wherein the middle rope wheel group cooperates with the car anti-rope mechanism at the top of the car frame to form a 4:1 traction ratio.

2. The traction system for a freight elevator with a large traction ratio according to claim 1, characterized in that, The car frame (3) is set with the main gantry frame at the middle part of the car depth as the center, and the auxiliary gantry frames are symmetrically set at both ends of the car with the main gantry frame as the center. The main gantry frame and the auxiliary gantry frames are connected into an integrated structure. Both the main gantry frame and the auxiliary gantry frames are equipped with a top beam (301), and the car anti-rope mechanism is set in the top beam.

3. The traction system for a freight elevator with a large traction ratio according to claim 2, characterized in that, The car anti-rope mechanism in the main gantry corresponds to the middle rope wheel group (105) of the car guide wheel group, and the car anti-rope mechanisms in the two auxiliary gantry are respectively coordinated with the left rope wheel group (104) and the right rope wheel group (103).

4. A traction system for a freight elevator with a large traction ratio according to claim 1, 2, or 3, characterized in that, One end of the wire rope (5) is fixed in the machine room and first forms a 4:1 traction ratio through the car anti-rope mechanism and the middle rope wheel group (105) in the main gantry; then it is wound around to the left rope wheel group (104) and the right rope wheel group (103) and the car anti-rope mechanism in the auxiliary gantry respectively.

5. A traction system for a freight elevator with a large traction ratio according to claim 4, characterized in that, Two guide wheels are respectively provided in the car anti-rope mechanism in the main gantry, the car anti-rope mechanism in the secondary gantry, the left rope wheel group (104), the middle rope wheel group (105), and the right rope wheel group (103).

6. The traction system for a freight elevator with a large traction ratio according to claim 1, characterized in that, The counterweight anti-rope mechanism is provided with a number of guide wheels. The number of guide wheels in the counterweight guide wheel group (102) is one less than the number of guide wheels in the counterweight anti-rope mechanism. The counterweight guide wheel group is arranged directly above the counterweight anti-rope mechanism.

7. A traction system for a freight elevator with a large traction ratio according to claim 1, 2, 3, or 6, characterized in that, The two ends of the wire rope (5) are respectively positioned on the machine room support beam by the rope head assembly.

8. A traction system for a freight elevator with a large traction ratio according to claim 1, characterized in that, The traction machine (101) is provided with a tensioning guide wheel (108) below it, and the tensioning guide wheel is equipped with a rope retainer.

9. A traction system for a freight elevator with a large traction ratio according to claim 1, characterized in that, All sheave groups in the car anti-rope mechanism and car guide sheave group are equipped with sheave guards; and rope guards are provided at the configured guide sheave locations.

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