Underbeam group mechanism facilitating improvement in load capacity, and machine-room-less elevator

Abstract

An underbeam group structure facilitating an improvement in load capacity, which structure is used for a machine-room-less elevator. The underbeam group structure comprises a first underbeam assembly (11) and a second underbeam assembly (12) arranged spaced apart; and further comprises a linkage safety device, and a first lifting mechanism, a second lifting mechanism, a first safety gear device and a second safety gear device, which are provided in the linkage safety device. The first safety gear device is fixed to the first underbeam assembly (11), the second safety gear device is fixed to the second underbeam assembly (12), the first lifting mechanism is connected to the first underbeam assembly (11) and the first safety gear device, the second lifting mechanism is connected to the second underbeam assembly (12) and the second safety gear device, and the first lifting mechanism and the second lifting mechanism are connected to implement linkage and cooperation.

Description

A lower beam assembly mechanism and machine room-less elevator that is beneficial to increasing load capacity

[0001] This application claims priority to the Chinese patent application filed on February 22, 2024, with application number 202420339345.9 and invention name “A lower beam assembly mechanism and machine room-less elevator conducive to increasing load capacity”, the content of which should be understood as incorporated into this application by reference. Technical Field

[0002] This article relates to but is not limited to the field of elevator technology, and in particular to a lower beam assembly mechanism and a machine room-less elevator that are beneficial to increasing the load capacity. Background Art

[0003] Machine-room-less elevators consist of a car frame formed by a lower beam assembly, an upper beam assembly, and two columns. The car floor is fixed to the upper end of the lower beam assembly. This structure has limited load capacity and is difficult to adapt to the increasing load requirements of elevators. Summary of the Invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] An embodiment of the present disclosure provides a lower beam group structure that is beneficial for increasing the load capacity and is used for a machine room-less elevator. The lower beam group structure includes: a first lower beam assembly and a second lower beam assembly arranged at intervals; and a linkage safety device, including a first lifting mechanism, a second lifting mechanism, a first safety clamp device and a second safety clamp device. The first safety clamp device is fixed to the first lower beam assembly, and the second safety clamp device is fixed to the second lower beam assembly. The first lifting mechanism is connected to the first lower beam assembly and the first safety clamp device, and the second lifting mechanism is connected to the second lower beam assembly and the second safety clamp device; and the first lifting mechanism is connected to the second lifting mechanism to achieve linkage cooperation.

[0006] The presently disclosed embodiments further provide a machine room-less elevator, comprising: a lower beam group structure, an upper beam group structure, a first column group, a second column group, and a car platform as described in the above embodiments; the upper beam group structure comprises a first upper beam assembly and a second upper beam assembly arranged at intervals; the first column group connects the first upper beam assembly and the first lower beam assembly to form a first car frame; the second column group connects the second upper beam assembly and the second lower beam assembly to form a second car frame; the car platform is located on the upper side of the first lower beam assembly and the second lower beam assembly, and is fixedly connected to the first lower beam assembly and the second lower beam assembly.

[0007] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description.

[0008] Summary of the Figures

[0009] FIG1 is a schematic diagram of a partial three-dimensional structure of a machine room-less elevator provided by some embodiments of the present disclosure;

[0010] FIG2 is a perspective schematic diagram of the structure shown in FIG1 from another perspective;

[0011] FIG3 is an enlarged structural diagram of portion A in FIG2 ;

[0012] FIG4 is a schematic front view of the structure shown in FIG1 ;

[0013] FIG5 is a bottom view schematically showing the structure shown in FIG1 ;

[0014] FIG6 is a perspective schematic diagram of the structure shown in FIG1 from another perspective;

[0015] FIG7 is a schematic diagram of a partial three-dimensional structure of the structure shown in FIG1 (omitting the first column and the first safety gear and other structures) from another perspective;

[0016] FIG8 is an enlarged structural diagram of portion B in FIG7 ;

[0017] FIG9 is a partially enlarged structural diagram of a machine room-less elevator provided in some other embodiments of the present disclosure;

[0018] FIG10 is a schematic diagram of the assembly of the second wheel cover and the second rope-blocking rod provided in some embodiments of the present disclosure.

[0019] In the accompanying drawings, the components represented by the respective reference numerals are as follows: 11 first lower beam assembly, 111 first lower beam channel steel, 1111 first mounting hole, 112 first reinforcing channel steel; 12 second lower beam assembly, 121 second lower beam channel steel; 211 first connecting shaft, 212 second connecting shaft, 213 first intermediate linkage mechanism, 214 connecting rod assembly; 221 third connecting shaft, 222 fourth connecting shaft, 223 second intermediate linkage mechanism; 31 first safety gear; 32 second safety gear; 33 lifting shaft; 41 first auxiliary beam, 42 second auxiliary beam, 43 first mounting space, 44 second mounting space; 51 first return rope pulley assembly, 511 first return rope pulley, 512 wheel axle, 52 second return rope pulley assembly, 521 second return rope pulley, 53 first support member, 54 second support member; 61 First rope stop device, 611 First wheel cover, 6111 First baffle, 6112 First folded edge, 6113 Second folded edge, 6114 Avoidance gap, 612 First rope stop rod, 62 Second rope stop device, 621 Second wheel cover, 6211 Second baffle, 6212 Third folded edge, 6213 Fourth folded edge, 622 Second rope stop rod, 623 Connecting plate, 624 Reinforcement strip; 71 First upper beam assembly, 72 Second upper beam assembly, 73 Upper reinforcement channel steel; 81 First column group, 82 Second column group, 83 Side reinforcement channel steel; 9 Car bottom, 91 Car bottom channel steel.

[0020] Details

[0021] The principles and features of the embodiments of the present disclosure are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present disclosure and are not used to limit the scope of the present disclosure.

[0022] As shown in FIG. 1 to FIG. 10 , the embodiments of the present disclosure provide a lower beam assembly mechanism and a machine room-less elevator that are conducive to increasing the load capacity.

[0023] As shown in FIG1 , the machine room-less elevator includes: a lower beam group structure, an upper beam group structure, a first column group 81 , a second column group 82 , and a car platform 9 .

[0024] As shown in Figure 1, the lower beam assembly structure includes: a first lower beam assembly 11 and a second lower beam assembly 12, which are spaced apart, and a linkage safety device. The first lower beam assembly 11 and the second lower beam assembly 12 can be spaced apart and parallel in the horizontal direction.

[0025] As shown in Figure 1, the linkage safety device includes a first lifting mechanism, a second lifting mechanism, a first safety clamp assembly, and a second safety clamp assembly. The first safety clamp assembly is fixed to the first lower beam assembly 11. The second safety clamp assembly is fixed to the second lower beam assembly 12. The first lifting mechanism is connected to the first lower beam assembly 11 and the first safety clamp assembly. The second lifting mechanism is connected to the second lower beam assembly 12 and the second safety clamp assembly. Furthermore, the first and second lifting mechanisms are connected to achieve linkage coordination.

[0026] As shown in Figure 1, the upper beam assembly structure includes a first upper beam assembly 71 and a second upper beam assembly 72 spaced apart. The first upper beam assembly 71 and the second upper beam assembly 72 can be spaced apart in parallel in the horizontal direction. The first upper beam assembly 71 and the first lower beam assembly 11 can be spaced apart in parallel in the vertical direction. The second upper beam assembly 72 and the second lower beam assembly 12 can be spaced apart in parallel in the vertical direction. The first upper beam assembly 71 and the second upper beam assembly 72 can be fixedly connected by an upper reinforcing channel steel 73 to improve overall strength.

[0027] As shown in Figure 1, the first column group 81 connects the first upper beam assembly 71 and the first lower beam assembly 11 to form a first car frame. The first column group 81 can include two first columns spaced apart in the horizontal direction, one first column connecting the first end of the first upper beam assembly 71 and the first lower beam assembly 11, and the other first column connecting the second end of the first upper beam assembly 71 and the first lower beam assembly 11.

[0028] As shown in Figure 1, a second column group 82 connects the second upper beam assembly 72 and the second lower beam assembly 12 to form a second car frame. The second column group 82 may include two second columns spaced apart horizontally, one connecting the first ends of the second upper beam assembly 72 and the second lower beam assembly 12, and the other connecting the second ends of the second upper beam assembly 72 and the second lower beam assembly 12. Adjacent first and second columns may be fixedly connected by side reinforcing channel steel 83 to enhance overall strength.

[0029] As shown in FIG. 1 , the car platform 9 is located above the first lower beam assembly 11 and the second lower beam assembly 12 and is fixedly connected to the first lower beam assembly 11 and the second lower beam assembly 12 .

[0030] In this way, the number of lower beam components of the machine-room-less elevator is increased from one group to multiple groups, which can significantly improve the load capacity of the machine-room-less elevator, thereby helping to adapt to the increasing load capacity requirements of elevators and is suitable for machine-room-less elevators with large tonnage loads, such as large-tonnage machine-room-less freight elevators.

[0031] Furthermore, the lower beam assembly structure also includes a linkage safety device. When an abnormal situation occurs, the first lifting mechanism pulls the first safety clamp device to brake the first lower beam assembly 11; the second lifting mechanism pulls the second safety clamp device to brake the second lower beam assembly 12. Compared to providing only one set of safety clamp devices, this solution provides multiple sets of safety clamp devices, which helps improve the braking reliability of the machine-room-less freight elevator in the event of an abnormal situation. Furthermore, because the first and second lifting mechanisms are connected and coordinated, the first and second safety clamp devices can maintain synchronous movement, allowing the elevator to remain stable during braking, thereby helping to improve the strength and stability of large-tonnage machine-room-less elevators.

[0032] In addition, the number of upper beam components has increased from one group to multiple groups, and the number of columns has also increased accordingly, so that the number of car frames of the machine room-less elevator has increased from one to multiple, which is conducive to further improving the load capacity of the machine room-less elevator and facilitating the assembly of the elevator.

[0033] It should be understood that the disclosed embodiments only illustrate a case where the number of lower beam assemblies is two and the number of upper beam assemblies is two. Of course, the number of lower beam assemblies is not limited to two and can be three, four, or more. The number of upper beam assemblies is also not limited to two and can be three, four, or more. Similarly, the number of safety gear devices and lifting mechanisms is also not limited to two and can be three, four, or more.

[0034] In some exemplary embodiments, as shown in FIG5 , the first safety clamp device includes two first safety clamps 31. The two first safety clamps 31 are respectively fixed to both ends of the first lower beam assembly 11 in the length direction.

[0035] As shown in Figure 5, the second safety clamp device includes two second safety clamps 32. The two second safety clamps 32 are respectively fixed to both ends of the second lower beam assembly 12 in the longitudinal direction.

[0036] As shown in Figures 2, 3, 4, and 6, the first lifting mechanism includes a first connecting shaft 211 and a second connecting shaft 212. The first connecting shaft 211 and the second connecting shaft 212 are respectively mounted at opposite ends of the first lower beam assembly 11 in the longitudinal direction and are connected to two first safety clamps 31, respectively. Specifically, the first connecting shaft 211 is connected to one of the first safety clamps 31, and the second connecting shaft 212 is connected to the other first safety clamp 31. The first lower beam assembly 11 may include two first lower beam channel steels 111 disposed opposite each other. The first connecting shaft 211 connects the first ends of the two first lower beam channel steels 111, and the second connecting shaft 212 connects the second ends of the two first lower beam channel steels 111. The first connecting shaft 211 and the second connecting shaft 212 can each be connected to one of the first safety clamps 31 via a connecting rod assembly 214. Specifically, the first connecting shaft 211 can be connected to one first safety clamp 31 via the connecting rod assembly 214, and the second connecting shaft 212 can be connected to the other first safety clamp 31 via the connecting rod assembly 214.

[0037] The second lifting mechanism includes a third connecting shaft 221 and a fourth connecting shaft 222. The third connecting shaft 221 and the fourth connecting shaft 222 are mounted at opposite ends of the second lower beam assembly 12 in the longitudinal direction and are respectively connected to the two second safety clamps 32. Specifically, the third connecting shaft 221 is connected to one of the second safety clamps 32, and the fourth connecting shaft 222 is connected to the other second safety clamp 32. The second lower beam assembly 12 may include two second lower beam channel steels 121 disposed opposite each other. The third connecting shaft 221 connects the first ends of the two second lower beam channel steels 121, and the fourth connecting shaft 222 connects the second ends of the two second lower beam channel steels 121. The third connecting shaft 221 and the fourth connecting shaft 222 can each be connected to one of the second safety clamps 32 via the connecting rod assembly 214. Specifically, the third connecting shaft 221 can be connected to one second safety clamp 32 via the connecting rod assembly 214, and the fourth connecting shaft 222 can be connected to the other second safety clamp 32 via the connecting rod assembly 214.

[0038] The first lifting mechanism may further include a first intermediate linkage mechanism 213, which connects the first connecting shaft 211 and the second connecting shaft 212, allowing the first connecting shaft 211 and the second connecting shaft 212 to rotate synchronously, thereby ensuring that the two first safety clamps 31 can move synchronously, thereby ensuring the stability of the first lower beam assembly 11. The second lifting mechanism may further include a second intermediate linkage mechanism 223, which connects the third connecting shaft 221 and the fourth connecting shaft 222, allowing the third connecting shaft 221 and the fourth connecting shaft 222 to rotate synchronously, thereby ensuring that the two second safety clamps 32 can move synchronously, thereby ensuring the stability of the second lower beam assembly 12.

[0039] The first connecting shaft 211 and the third connecting shaft 221 are arranged side by side and spaced apart. The second connecting shaft 212 and the fourth connecting shaft 222 are arranged side by side and connected by the lifting shaft 33, thereby achieving coordinated cooperation between the first and second lifting mechanisms. In other words, the first connecting shaft 211 and the third connecting shaft 221 are located on the same side and are independent of each other. The second connecting shaft 212 and the fourth connecting shaft 222 are located on the same side and connected by the lifting shaft 33, allowing the second connecting shaft 212 and the fourth connecting shaft 222 to rotate synchronously, thereby achieving coordinated cooperation between the first and second lifting mechanisms.

[0040] In some exemplary embodiments, as shown in FIG. 1 and FIG. 3 to FIG. 5 , the lower beam group structure may further include: a first auxiliary beam 41 , a second auxiliary beam 42 , a first return pulley group 51 and a second return pulley group 52 .

[0041] The first attachment beam 41 and the second attachment beam 42 are arranged to be fixedly connected to the car platform 9, which can further enhance the strength of the lower beam group structure.

[0042] As shown in FIG4 , the first attachment beam 41, the first lower beam assembly 11, the second attachment beam 42, and the second lower beam assembly 12 are sequentially spaced apart, for example, spaced apart in parallel along the horizontal direction. The first return pulley assembly 51 is at least partially located between the first attachment beam 41 and the first lower beam assembly 11, and the second return pulley assembly 52 is at least partially located between the second attachment beam 42 and the second lower beam assembly 12, as shown in FIG1 .

[0043] 3 , a first installation space 43 is formed between the first attachment beam 41 and the first lower beam assembly 11. The first return pulley assembly 51 may include two first return pulleys 511 fixed to the first and second ends of the first installation space 43, respectively.

[0044] 3 , a second installation space 44 is formed between the second auxiliary beam 42 and the second lower beam assembly 12. The second return pulley assembly 52 may include two second return pulleys 521, which are installed at the first and second ends of the second installation space 44, respectively.

[0045] Placing at least part of the first return pulley assembly 51 and the second return pulley assembly 52 in the first installation space 43 and the second installation space 44 can reduce the space requirement of the machine room-less elevator at the bottom of the shaft.

[0046] In some exemplary embodiments, as shown in Figure 1, the lower beam assembly structure may further include a first rope-blocking device 61 and a second rope-blocking device 62. The first rope-blocking device 61 and the second rope-blocking device 62 are configured to cooperate with the first rope-returning pulley assembly 51 and the second rope-returning pulley assembly 52, respectively.

[0047] This can prevent the ropes (such as steel ropes) on the first return rope pulley set 51 and the second return rope pulley set 52 from falling off during use, thereby helping to improve the reliability of the elevator.

[0048] In some exemplary embodiments, please refer to Figures 2, 3, 7 and 8, the upper part of the first return pulley 511 is located in the first installation space 43, and the lower part is located on the lower side of the first installation space 43. The first rope-blocking device 61 includes: a first wheel cover 611. The first wheel cover 611 is provided at the lower part of the first return pulley group 51, and is fixedly connected to the first lower beam assembly 11 and the first attachment beam 41. The first wheel cover 611 can enclose the four sides of the first return pulley group 51 to reduce the risk of the wheel rope (such as a steel wire rope) on the first return pulley group 51 falling off during use, and can also protect the first return pulley 511.

[0049] There can be two first wheel covers 611, with the two first wheel covers 611 corresponding one to the two first return pulleys 511. Each first wheel cover 611 can be assembled by five first baffles 6111 to form a wheel cover structure that is roughly rectangular and open at the top. The two first wheel covers 611 can also be connected by a connecting plate 623. As shown in Figure 2, the connecting plate 623 can also be fixedly connected to the lower end of the first lower beam channel steel 111 and the lower end of the first auxiliary beam 41 through a reinforcing strip 624. The two first baffles 6111 arranged opposite each other along the axial direction of the first return pulley 511 can be configured as bent plates to form the first folded edge 6112 and the second folded edge 6113 in the following scheme.

[0050] Referring to Figures 2, 3, and 7, the upper portion of the second return pulley 521 is located within the second installation space 44, and the lower portion is located below the second installation space 44. The second rope-blocking device 62 includes a second wheel cover 621, which is disposed below the second return pulley assembly 52 and is fixedly connected to the second lower beam assembly 12 and the second attachment beam 42. The second wheel cover 621 can enclose the second return pulley assembly 52 to reduce the risk of the rope (e.g., wire rope) on the second return pulley assembly 52 falling off during use, and can also protect the second return pulley 521.

[0051] There can be two second wheel covers 621, with the two second wheel covers 621 corresponding one to the two second return pulleys 521. Each second wheel cover 621 can be assembled by five second baffles 6211 to form a wheel cover structure that is roughly rectangular and open at the top. The two second wheel covers 621 can also be connected by a connecting plate 623, and the connecting plate 623 can also be fixedly connected to the lower end of the second lower beam channel steel 121 and the lower end of the second auxiliary beam 42 via a reinforcing strip 624. The two second baffles 6211 arranged opposite each other along the axial direction of the second return pulley 521 can be configured as bent plates to form the third folded edge 6212 and the fourth folded edge 6213 in the following scheme, as shown in Figure 10.

[0052] In some exemplary embodiments, the axle 512 of the first return pulley assembly 51 is located below the first lower beam assembly 11. The first lower beam assembly 11 is provided with a first reinforcing channel steel 112, as shown in FIG8 . One end of the axle 512 of the first return pulley assembly 51 is connected to the lower end of the first reinforcing channel steel 112 via a first support member 53. The other end of the axle 512 of the first return pulley assembly 51 is connected to the first attachment beam 41 via a first support member 53, as shown in FIG9 .

[0053] As shown in Figure 8, the first reinforcing channel 112 can be installed on the first lower beam channel 111 of the first lower beam assembly 11, near the first attachment beam 41, and can be secured to the inner sidewall of the first lower beam channel 111 (i.e., the sidewall facing the second lower beam assembly 12) by welding or other means. The first attachment beam 41 is also a channel, and the channel opening of the first attachment beam 41 faces the same direction as the opening of the first lower beam channel 111 adjacent to it. The first support member 53 can be a U-shaped support stud, with both ends of the support stud extending through the lower end of the first reinforcing channel 112 / first attachment beam 41 and secured to the first reinforcing channel 112 / first attachment beam 41 via nuts (not shown). The ends of the axle 512 of the first return pulley assembly 51 extend through and are supported by the two U-shaped support studs. The first wheel cover 611 can be provided with a clearance notch 6114 to provide clearance for the ends of the axle 512 of the first return pulley assembly 51. The two wheel shafts 512 of the first return rope pulley assembly 51 are located between the two first safety clamps 31 and staggered with the first safety clamps 31 to prevent interference and facilitate installation and removal of the first return rope pulley 511.

[0054] Similarly, the axle 512 of the second return pulley assembly 52 is located below the second lower beam assembly 12. The second lower beam assembly 12 is equipped with a second reinforcing channel steel (not shown; refer to the first reinforcing channel steel 112). One end of the axle 512 of the second return pulley assembly 52 is connected to the lower end of the second reinforcing channel steel via a second support member 54. The other end of the axle 512 of the second return pulley assembly 52 is connected to the second auxiliary beam 42 via a second support member 54.

[0055] The second reinforcing channel steel can be installed on the second lower beam channel steel 121 of the second lower beam assembly 12, near the second attachment beam 42, and can be fixed to the inner side wall of the second lower beam channel steel 121 (i.e., the side wall facing the first lower beam assembly 11) by welding or other means. The second attachment beam 42 is also a channel steel, and the channel steel opening of the second attachment beam 42 faces the same direction as the opening of the second lower beam channel steel 121 near it. The second support member 54 can be a U-shaped support stud, the ends of which are inserted through the lower end of the second reinforcing channel steel / second attachment beam 42 and fixed to the second reinforcing channel steel / second attachment beam 42 via nuts (not shown). The ends of the axle 512 of the second return pulley assembly 52 are inserted through two U-shaped support studs and supported by the two U-shaped support studs. The second wheel cover 621 can be provided with an avoidance gap 6114 to avoid the ends of the axle 512 of the second return pulley assembly 52. The two wheel shafts 512 of the second return rope pulley assembly 52 are located between the two second safety clamps 32 and staggered with the second safety clamps 32 to prevent interference and facilitate installation and removal of the second return rope pulley 521.

[0056] Of course, the number of the return rope pulley groups can change with the number of the lower beam assemblies. The number of the rope retaining devices can change with the number of the return rope pulley groups.

[0057] In some exemplary embodiments, the first rope blocking device 61 may further include: at least one first rope blocking rod 612, as shown in Figures 3, 6 and 9. The first rope blocking rod 612 is parallel to the rotation axis of the first return pulley set 51 and fixed to the first wheel cover 611.

[0058] In this way, the first rope-blocking rod 612 is closer to the wheel rope (e.g., wire rope), which further improves the rope-blocking effect. Furthermore, the first wheel cover 611 can be designed into a regular rectangular parallelepiped shape for ease of installation. There can be multiple first rope-blocking rods 612, which are spaced apart along the circumference of the first return pulley assembly 51.

[0059] In one example, referring to Figures 3, 6, 8, and 9, four first rope-blocking rods 612 are provided around the circumference of each first return rope pulley 511. Two of the first rope-blocking rods 612 are located on the side of the first return rope pulley 511 away from the other first return rope pulley 511, a third first rope-blocking rod 612 is located below the first return rope pulley 511, and the remaining first rope-blocking rod 612 is located on the side of the first return rope pulley 511 close to the other first return rope pulley 511, and is positioned higher. Multiple through holes can be provided on the first wheel cover 611 so that the positions of the first rope-blocking rods 612 can be adjusted as needed.

[0060] Similarly, as shown in Figures 3, 6 and 10, the second rope blocking device 62 may further include: at least one second rope blocking rod 622, the second rope blocking rod 622 is parallel to the rotation axis of the second return rope pulley set 52 and is fixed to the second wheel cover 621.

[0061] In this way, the second rope-blocking rod 622 is closer to the wheel rope (e.g., wire rope), which is conducive to further improving the rope-blocking effect; and the second wheel cover 621 can be designed into a regular rectangular parallelepiped shape for easy installation. The number of second rope-blocking rods 622 can be multiple, and the multiple second rope-blocking rods 622 are spaced apart along the circumference of the second return rope pulley assembly 52.

[0062] In one example, as shown in FIG3 , four second rope-blocking rods 622 are provided around the circumference of each second return rope pulley 521. Two of the second rope-blocking rods 622 are located on a side of the second return rope pulley 521 away from the other second return rope pulley 521, a third second rope-blocking rod 622 is located below the second return rope pulley 521, and the remaining second rope-blocking rod 622 is located on a side of the second return rope pulley 521 closer to the other second return rope pulley 521 and positioned higher. Multiple through-holes may be provided on the second pulley cover 621 to allow the positions of the second rope-blocking rods 622 to be adjusted as needed.

[0063] In some exemplary embodiments, as shown in Figures 3 and 4 , the first lower beam assembly 11 includes two first lower beam channel steels 111 disposed opposite each other. The first lower beam channel steels 111 are provided with first mounting holes 1111, as shown in Figure 8 . The first safety clamp device is secured to the lower end of the first lower beam channel steel 111 via the first mounting holes 1111. Referring to Figures 5 , 8 , and 9 , the first wheel cover 611 is provided with a first hem 6112 and a plurality of second hems 6113. The plurality of second hems 6113 are fixedly connected to the lower end of the first lower beam channel steel 111 and the lower end of the first attachment beam 41. The first hem 6112 is positioned corresponding to the first safety clamp device and is higher than the second hem 6113. The first hem 6112 is fixedly connected to the upper end of the first lower beam channel steel 111.

[0064] The first safety clamp device can be fixed to the lower end of the first lower beam channel steel 111 via a first fastener, which is inserted into the first mounting hole 1111 of the first lower beam channel steel 111. The first attached beam 41 can also be a channel steel and also be provided with a first mounting hole 1111. The plurality of second folded edges 6113 can be fixedly connected to the lower end of the first lower beam channel steel 111 and the lower end of the first attached beam 41 via the first fastener. The position of the first folded edge 6112 corresponds to that of the first safety clamp device, but the fixation of the first safety clamp device occupies the first mounting hole 1111 at that position at the lower end of the first lower beam channel steel 111. Therefore, in this solution, the position of the first folded edge 6112 is raised so that it is fixedly connected to the upper end of the first lower beam channel steel 111 to avoid interference with the first safety clamp device.

[0065] In one example, there are three second hems 6113, two of which are located on the same side of the first wheel housing 611 and are locked to the first attachment beam 41. The other second hem 6113 is offset from the first safety clamp device, preventing interference and thus can be directly locked to the lower end of the first lower beam channel 111. The first hem 6112 corresponds to the position of the first safety clamp device and can theoretically be fixed to the same position on the first lower beam channel 111. To avoid interference, the first hem 6112 is moved upward so that it is locked to the upper end of the first lower beam channel 111.

[0066] In other words, the first wheel cover 611 adopts a high-low leg structure to ensure that the four legs (i.e., four folded edges) of the first wheel cover 611 can be fixedly connected to the first lower beam channel steel 111 and the first auxiliary beam 41, effectively locked, thereby effectively ensuring the strength of the rope retaining device. Of course, the first wheel cover 611 may not adopt a high-low leg structure. The first folded edge 6112 can be superimposed on the first safety clamp 31 and fixed to the lower end of the first lower beam channel steel 111 through the first fastener; or the first folded edge 6112 can be staggered with the first safety clamp device along the length direction of the first lower beam channel steel 111, and then fixed to the lower end of the first lower beam channel steel 111 by spot welding or fasteners.

[0067] Similarly, as shown in Figures 3 and 4, the second lower beam assembly 12 includes two second lower beam channel steels 121 arranged in opposite directions. The second lower beam channel steel 121 is provided with a second mounting hole (not shown in the figures, refer to the first mounting hole 1111). The second safety clamp device is fixed to the lower end of the second lower beam channel steel 121 through the second mounting hole. Referring to Figures 5, 8, and 10, the second wheel cover 621 is provided with a third folded edge 6212 and multiple fourth folded edges 6213. The multiple fourth folded edges 6213 are fixedly connected to the lower end of the second lower beam channel steel 121 and the lower end of the second attachment beam 42. The position of the third folded edge 6212 corresponds to the position of the second safety clamp device and is higher than the position of the fourth folded edge 6213. The third folded edge 6212 is fixedly connected to the upper end of the second lower beam channel steel 121.

[0068] The second safety clamp device can be fixed to the lower end of the second lower beam channel steel 121 via a second fastener, which is inserted into the second mounting hole of the second lower beam channel steel 121. The second auxiliary beam 42 can also be a channel steel and also have a second mounting hole. The plurality of fourth folded edges 6213 can be fixedly connected to the lower end of the second lower beam channel steel 121 and the lower end of the second auxiliary beam 42 via the second fastener. The position of the third folded edge 6212 corresponds to that of the second safety clamp device, but the fixation of the second safety clamp device occupies the second mounting hole at this position on the lower end of the second lower beam channel steel 121. Therefore, in this solution, the position of the third folded edge 6212 is raised so that it is fixedly connected to the upper end of the second lower beam channel steel 121 to avoid interference with the second safety clamp device.

[0069] In one example, as shown in Figure 10, there are three fourth hems 6213, two of which are located on the same side of the second wheel housing 621 and are locked to the second attachment beam 42. The other fourth hem 6213 is offset from the second safety clamp device, preventing interference and thus can be directly locked to the lower end of the second lower beam channel 121. The third hem 6212 corresponds to the position of the second safety clamp device and can theoretically be fixed to the same position on the second lower beam channel 121. To avoid interference, the third hem 6212 is moved upward so that it is locked to the upper end of the second lower beam channel 121.

[0070] In other words, the second wheel cover 621 adopts a high-low foot structure to ensure that the four legs (i.e., four folded edges) of the second wheel cover 621 can be fixedly connected to the second lower beam channel steel 121 and the second auxiliary beam 42, effectively locked, thereby effectively ensuring the strength of the rope retaining device. Of course, the second wheel cover 621 may not adopt a high-low foot structure. The third folded edge 6212 can be superimposed on the second safety clamp 32 and fixed to the lower end of the second lower beam channel steel 121 through the second fastener; or the third folded edge 6212 can be staggered with the second safety clamp device along the length direction of the second lower beam channel steel 121, and then fixed to the lower end of the second lower beam channel steel 121 through spot welding or fasteners.

[0071] In some exemplary embodiments, the first folded edge 6112 and the third folded edge 6212 are provided with an avoidance gap 6114 , and the avoidance gap 6114 is configured to avoid the channel steel 91 of the car bottom, as shown in FIG. 9 and FIG. 10 .

[0072] Since the upper ends of the first lower beam channel steel 111 and the second lower beam channel steel 121 need to be fitted and fixed with the channel steel 91 of the car bottom, an avoidance gap 6114 is set on the first folding edge 6112 and the third folding edge 6212 to ensure that the channel steel 91 of the car bottom will not interfere with the first folding edge 6112 and the third folding edge 6212 when the car bottom 9 is subsequently installed.

[0073] In summary, the machine room-less elevator and its lower beam group structure provided by the embodiments of the present disclosure use a structure of multiple groups of lower beam components and a linkage safety device, which can improve the strength and stability of large-tonnage machine room-less elevators; by reasonably arranging the positions of the return rope pulley, safety clamp, and linkage safety device, it can meet the use requirements and facilitate installation; the rope stop device is made by passing the wheel cover through the rope stop rod, which is ingenious; in order to avoid the safety clamp, the wheel cover is provided with a high and low foot structure.

[0074] In the description of the embodiments of the present disclosure, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless expressly limited otherwise.

[0076] In this disclosure, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediate medium; and internal communication between two elements or interaction between two elements, unless otherwise expressly specified or limited. A person of ordinary skill in the art will be able to understand the meanings of the above terms in this disclosure based on the circumstances.

[0077] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0079] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A lower beam group structure that is conducive to increasing load capacity, used in a machine room-less elevator, the lower beam group structure comprising: a first lower beam assembly and a second lower beam assembly spaced apart from each other; as well as The linkage safety device includes a first lifting mechanism, a second lifting mechanism, a first safety clamp device and a second safety clamp device. The first safety clamp device is fixed to the first lower beam assembly, and the second safety clamp device is fixed to the second lower beam assembly. The first lifting mechanism is configured to be connected to the first lower beam assembly and the first safety clamp device, and the second lifting mechanism is configured to be connected to the second lower beam assembly and the second safety clamp device; and the first lifting mechanism is connected to the second lifting mechanism to achieve linkage cooperation.

2. The lower beam group structure according to claim 1, wherein: The first safety clamp device includes two first safety clamps, which are respectively fixed to the two ends of the first lower beam assembly in the longitudinal direction; the second safety clamp device includes two second safety clamps, which are respectively fixed to the two ends of the second lower beam assembly in the longitudinal direction; The first lifting mechanism includes: a first connecting shaft and a second connecting shaft, the first connecting shaft and the second connecting shaft are respectively installed at the two ends of the length direction of the first lower beam assembly and are respectively connected to the two first safety clamps; the second lifting mechanism includes: a third connecting shaft and a fourth connecting shaft, the third connecting shaft and the fourth connecting shaft are respectively installed at the two ends of the length direction of the second lower beam assembly and are respectively connected to the two second safety clamps; The first connecting shaft and the third connecting shaft are arranged side by side and spaced apart, and the second connecting shaft and the fourth connecting shaft are arranged side by side and connected through a lifting shaft, so that the first lifting mechanism and the second lifting mechanism are linked together.

3. The lower beam assembly structure according to claim 1 or 2, further comprising: a first auxiliary beam, a second auxiliary beam, a first return rope pulley group, and a second return rope pulley group; The first attachment beam and the second attachment beam are arranged to be fixedly connected to the car bottom, and the first attachment beam, the first lower beam assembly, the second attachment beam, and the second lower beam assembly are arranged in sequence and spaced apart; The first return pulley assembly is at least partially located between the first attachment beam and the first lower beam assembly, and the second return pulley assembly is at least partially located between the second attachment beam and the second lower beam assembly.

4. The lower beam assembly structure according to claim 3, further comprising: A first rope-blocking device and a second rope-blocking device, wherein the first rope-blocking device and the second rope-blocking device are configured to cooperate with the first rope-returning wheel group and the second rope-returning wheel group respectively.

5. The lower beam group structure according to claim 4, wherein: The first rope-blocking device includes: a first wheel cover, which is provided at the lower part of the first rope-returning wheel assembly and is fixedly connected to the first lower beam assembly and the first attachment beam; The second rope-blocking device includes a second wheel cover, which is arranged at the lower part of the second rope-returning wheel assembly and is fixedly connected to the second lower beam assembly and the second auxiliary beam.

6. The lower beam group structure according to claim 5, wherein: The axle of the first return pulley assembly is located at the lower side of the first lower beam assembly; the first lower beam assembly is provided with a first reinforcing channel steel, one end of the axle of the first return pulley assembly is connected to the lower end of the first reinforcing channel steel through a first support member, and the other end of the axle of the first return pulley assembly is connected to the first auxiliary beam through a first support member; The axle of the second return rope pulley group is located at the lower side of the second lower beam assembly; the second lower beam assembly is provided with a second reinforcing channel steel, one end of the axle of the second return rope pulley group is connected to the lower end of the second reinforcing channel steel through a second support member, and the other end of the axle of the second return rope pulley group is connected to the second auxiliary beam through a second support member.

7. The lower beam group structure according to claim 5, wherein: The first rope-blocking device further includes: at least one first rope-blocking rod, the first rope-blocking rod being parallel to the rotation axis of the first rope return pulley assembly and being fixed to the first wheel cover; The second rope-blocking device further includes: at least one second rope-blocking rod, the second rope-blocking rod is parallel to the rotation axis of the second rope return pulley set and is fixed to the second wheel cover.

8. The lower beam group structure according to claim 5, wherein: The first lower beam assembly includes: two first lower beam channel steels arranged opposite to each other, the first lower beam channel steels having a first mounting hole, and the first safety clamp device is fixed to the lower end of the first lower beam channel steel through the first mounting hole; the first wheel cover has a first folded edge and a plurality of second folded edges, the plurality of second folded edges are fixedly connected to the lower end of the first lower beam channel steel and the lower end of the first attachment beam; the position of the first folded edge corresponds to the position of the first safety clamp device and is higher than the position of the second folded edge, and the first folded edge is fixedly connected to the upper end of the first lower beam channel steel; The second lower beam assembly includes: two second lower beam channel steels arranged back to back, the second lower beam channel steels are provided with a second mounting hole, and the second safety clamp device is fixed to the lower end of the second lower beam channel steel through the second mounting hole; the second wheel cover is provided with a third folded edge and multiple fourth folded edges, and the multiple fourth folded edges are fixedly connected to the lower end of the second lower beam channel steel and the lower end of the second auxiliary beam; the position of the third folded edge corresponds to the second safety clamp device and is higher than the position of the fourth folded edge, and the third folded edge is fixedly connected to the upper end of the second lower beam channel steel.

9. The lower beam group structure according to claim 8, wherein: The first folded edge and the third folded edge are provided with avoidance gaps, and the avoidance gaps are configured to avoid the channel steel of the car bottom.

10. A machine room-less elevator, comprising: The lower beam group structure, the upper beam group structure, the first column group and the second column group, and the car platform that are conducive to increasing the load capacity as described in any one of claims 1 to 9; The upper beam group structure includes a first upper beam assembly and a second upper beam assembly that are spaced apart; The first column assembly connects the first upper beam assembly and the first lower beam assembly to form a first car frame; The second column assembly connects the second upper beam assembly and the second lower beam assembly to form a second car frame; The car platform is located on the upper side of the first lower beam assembly and the second lower beam assembly, and is fixedly connected to the first lower beam assembly and the second lower beam assembly.

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