Car frame structure provided with four sets of safety tongs and applied to super-large-load goods elevator

Abstract

A car frame structure provided with four sets of safety tongs and applied to an ultra-large load cargo elevator comprises four car frames arranged from front to back, each car frame comprises two stand columns, an upper beam with the left end and the right end connected with the upper ends of the two stand columns respectively, and a lower beam with the left end and the right end connected with the lower ends of the two stand columns respectively; the bottoms of all the upper beams are jointly connected with two longitudinal top beams which are distributed left and right, and the tops of all the lower beams are jointly connected with a chassis; a pull rod seat is arranged in the middle of the stand column, a front lower inclined pull rod with the lower end inclining forwards and downwards and a rear lower inclined pull rod with the lower end inclining backwards and downwards are arranged at the front end and the rear end of the pull rod seat respectively, the upper ends of the front lower inclined pull rod and the rear lower inclined pull rod are hinged to the pull rod seat, and the lower ends of the front lower inclined pull rod and the rear lower inclined pull rod are installed on the chassis through lower pull rod rotating shafts. The connecting strength between the car frames is effectively improved, and the stability of the car frame structure is enhanced, so that the whole elevator can bear higher load, and the use requirement of an ultra-large load cargo elevator is met.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, and particularly relates to a car frame structure with four sets of safety tongs applied to an extra-large load freight elevator. Background Art

[0002] In order to ensure the load-bearing capacity of the freight elevator, the existing car frame structures applied to freight elevators usually adopt multiple car frames arranged in sequence and combined.

[0003] For example, the car frame structure disclosed in the technical solution of patent number CN201922143129.9 includes a car bottom, a main car frame supported in the middle of the car bottom, and two sub-car frames supported at both ends of the car bottom. Safety tongs are provided at the bottoms of the main car frame and at least one sub-car frame, and a lifting mechanism is provided between the safety tongs for linkage. The lifting mechanism is installed on the main car frame and sub-car frames provided with safety tongs. The safety tongs are arranged at the bottoms of the main car frame and sub-car frames. A plurality of diagonal tie rods are provided between the car bottom and the main car frame for connection. A triangular connection structure is formed among the diagonal tie rods, the car bottom, and the main car frame. A reinforcing plate is provided at the connection of the main car frame and the diagonal tie rod, and the reinforcing plate is arranged inside the main car frame to form a support structure. By providing safety tongs on both the main car frame and the sub-car frames, and synchronously operating the safety tongs through the lifting mechanism, it is ensured that the safety tong braking of the car frame has sufficient braking force, improving the safety factor of the safety tong braking. At the same time, the structural strength of the elevator car frame is improved by the triangular connection structure formed by the diagonal tie rods between the main car frame and the bottom plate. And by providing a reinforcing plate at the connection of the main car frame and the diagonal tie rod, the structural strength of the connection can be effectively improved, preventing the main car frame from deforming under tension and improving the overall structural strength of the elevator car frame.

[0004] However, in this technical solution, only the triangular connection structure formed by the diagonal tie rods between the main car frame and the bottom plate improves the structural strength of the elevator car frame, while the sub-car frame is only fixed in cooperation with the main car frame through a cantilever beam and the car bottom, resulting in the stability of the sub-car frame in the car frame structure being weaker than that of the main car frame in the car frame structure, thus affecting the load-bearing capacity of the entire car frame structure. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a car frame structure with four sets of safety tongs applied to an extra-large load freight elevator.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A car frame structure with four sets of safety clamps used in an extra-large load freight elevator, comprising four car frames arranged from front to back and four sets of safety clamp mechanisms corresponding to each car frame, the car frame comprising two uprights distributed on the left and right, an upper beam with left and right ends respectively connected to the upper ends of the two uprights, and a lower beam with left and right ends respectively connected to the lower ends of the two uprights;

[0008] The bottoms of all upper beams are connected to two longitudinal top beams distributed on the left and right, which are characterized by:

[0009] All the columns are commonly connected to an upper support frame located below the longitudinal top beam, and the tops of all the lower beams are commonly connected to a chassis located below the upper support frame;

[0010] A tie rod seat is provided on the middle part of the column, and a front lower diagonal tie rod with a lower end tilted forward and downward and a rear lower diagonal tie rod with a lower end tilted backward and downward are respectively provided at the front and rear ends of the tie rod seat, and the upper ends of the front lower diagonal tie rod and the rear lower diagonal tie rod are both hinged on the tie rod seat, and the lower ends are both mounted on the chassis through a lower tie rod rotating shaft;

[0011] Two front and rear adjacent tie rod seats are commonly connected with a longitudinal support rod for constraining the distance between two front and rear adjacent upright posts.

[0012] In the utility model, the safety clamp mechanism includes two elevator safety clamps respectively arranged on two columns and a safety clamp linkage mechanism arranged on a lower beam for linking the actions of two elevator safety clamps on the same car frame. The two front and rear adjacent safety clamp linkage mechanisms are connected by a brake synchronization rod transmission to enable them to work synchronously.

[0013] In the utility model, the upper front end of the pull rod seat is provided with a front upper inclined pull rod with the upper end tilted forward and upward, the lower end of the front upper inclined pull rod is hinged on the pull rod seat, and the upper end is installed on the upper support frame through an upper pull rod rotating shaft.

[0014] In the utility model, at least three tie rod seats have rear ends provided with rear upper inclined tie rods with upper ends inclined backward and upward. The lower ends of the rear upper inclined tie rods are hinged to the tie rod seats, and the upper ends are mounted on the upper support frame by an upper tie rod rotating shaft.

[0015] In the utility model, the front lower diagonal tie rod, the rear lower diagonal tie rod, the front upper diagonal tie rod and the rear upper diagonal tie rod all include a tie rod body and an oblique tie screw fixed on one end of the tie rod body, the other end of the tie rod body is provided with a tie rod hinge hole, the tie rod seat is provided with a tie rod matching hole corresponding to the tie rod hinge hole, the screw end of the tie rod fixing bolt passes through the tie rod hinge hole and the tie rod matching hole and is threadedly fitted with a first tie rod nut; the upper tie rod rotating shaft and the lower tie rod rotating shaft are both provided with a tie rod insertion hole, the oblique tie screw passes through the tie rod insertion hole and is threadedly fitted with a second tie rod nut for fixing the tie rod screw.

[0016] In the present utility model, the upper support frame includes an upper support cross beam and two upper support longitudinal beams. One of the upper support longitudinal beams is fixedly connected to all the columns on the left side at the same time, and the other upper support longitudinal beam is fixedly connected to all the columns on the right side of the car frame at the same time. The left and right ends of the upper support cross beam are respectively fixedly connected to the front ends of the two upper support longitudinal beams.

[0017] In the present utility model, a longitudinal bottom beam is commonly connected between two lower beams that are adjacent to each other front and back and located in the middle.

[0018] In the present utility model, an installation space for installing the car wall is left between the upper support frame and the chassis.

[0019] In the present utility model, guide shoe seats are provided at the left and right ends of the top of the upper beam and the left and right ends of the bottom of the lower beam. Elevator guide shoes adapted to the car frame guide rails are provided on the guide shoe seats.

[0020] Advantages of the present utility model: By arranging the longitudinal top beam to connect all the upper beams together in the present utility model, the stability of the combined connection between the upper beams is improved; all the lower beams are combined and fixed by using the chassis, and then the columns are reinforced by using the upper support frame, thereby improving the structural stability of the entire car frame structure. In addition, by arranging the front lower diagonal tie rod, the rear lower diagonal tie rod, the longitudinal support rod, the front upper diagonal tie rod and the rear upper diagonal tie rod, the connection strength between the car frames is effectively improved, the stability of the car frame structure is enhanced, so that the entire elevator can bear a higher load and meet the use requirements of an extra-large load freight elevator. Description of the Drawings

[0021] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0022] Figure 1 is a three-dimensional view of the car frame structure Figure I ;

[0023] Figure 2 is a three-dimensional view of the car frame structure Figure II ;

[0024] Figure 3 is a left view of the car frame structure;

[0025] Figure 4 is a combined schematic diagram of four sets of safety clamp mechanisms;

[0026] Figure 5 is a combined schematic diagram of the lifting long shaft and various components;

[0027] Figure 6 is a combined schematic diagram of the lifting short shaft and various components;

[0028] Figure 7This is the installation diagram of the elevator safety clamp. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0032] Reference Figures 1-7 A car frame structure with four sets of safety clamps used in an extra-large load freight elevator, comprising four car frames 1 arranged from front to back and four sets of safety clamp mechanisms 2 corresponding to each car frame 1, the car frame 1 comprising a set of safety clamp mechanisms 2, two columns 11 distributed on the left and right, an upper beam 12 connected to the upper ends of the two columns 11 at both ends, and a lower beam 13 connected to the lower ends of the two columns 11 at both ends; the safety clamp mechanism 2 comprises two elevator safety clamps 21 respectively arranged on the two columns 11 and a safety clamp linkage mechanism 22 arranged on the lower beam 13 for linkage of the two elevator safety clamps 21 on the same car frame 1, and the two front and rear adjacent safety clamp linkage mechanisms 22 are connected by a brake synchronization rod 23 for synchronous operation;

[0033] Furthermore, the bottoms of all the upper beams 12 are jointly connected to two longitudinally distributed longitudinal top beams 3 which are arranged left and right. The two longitudinal top beams 3 are respectively close to the left and right columns 11. The longitudinal top beams 3 connect all the upper beams 12 together, improving the stability of the combined connection between the upper beams 12. All the columns 11 are jointly connected to an upper support frame 4 located below the longitudinal top beams 3. The tops of all the lower beams 13 are jointly connected to a chassis 5 located below the upper support frame 4. An installation space for installing the car wall is left between the upper support frame 4 and the chassis 5. The chassis 5 is used to combine and fix all the lower beams 13 together, and then the upper support frame 4 is used to reinforce the columns 11, thereby improving the structural stability of the entire car frame structure, enabling the entire freight elevator to bear a higher load and meeting the use requirements of an extra-large load freight elevator.

[0034] In this embodiment, a tie rod seat 14 is provided in the middle of the column 11. The front and rear ends of the tie rod seat 14 are respectively provided with a front lower inclined tie rod 15 with the lower end inclined forward and downward and a rear lower inclined tie rod 16 with the lower end inclined backward and downward. The upper ends of the front lower inclined tie rod 15 and the rear lower inclined tie rod 16 are both hinged to the tie rod seat 14, and the lower ends are both installed on the chassis 5 through a lower tie rod rotating shaft 101.

[0035] Two adjacent tie rod seats 14 in the front and rear are jointly connected to a longitudinal support rod 17. The longitudinal support rod 17 is used to restrict the distance between two adjacent columns 11 in the front and rear, reducing the probability of the middle part of the column 11 deforming and bending.

[0036] In this embodiment, the upper front ends of the tie rod seats 14 are respectively provided with front upper inclined tie rods 18 with the upper ends inclined forward and upward. The lower ends of the front upper inclined tie rods 18 are hinged to the tie rod seats 14, and the upper ends are installed on the upper support frame 4 through an upper tie rod rotating shaft 102.

[0037] In this embodiment, at least three rear ends of the tie rod seats 14 are provided with rear upper inclined tie rods 19 with the upper ends inclined backward and upward. The lower ends of the rear upper inclined tie rods 19 are hinged to the tie rod seats 14, and the upper ends are installed on the upper support frame 4 through an upper tie rod rotating shaft 102.

[0038] In this embodiment, by setting the front lower inclined tie rod 15, the rear lower inclined tie rod 16, the longitudinal support rod 17, the front upper inclined tie rod 18 and the rear upper inclined tie rod 19, the connection strength between each car frame 1 can be effectively improved, the structural stability of the car frame structure is enhanced, enabling the entire freight elevator to bear a higher load and meeting the use requirements of an extra-large load freight elevator.

[0039] In this embodiment, the front lower diagonal tie rod 15, the rear lower diagonal tie rod 16, the front upper diagonal tie rod 18 and the rear upper diagonal tie rod 19 each include a tie rod body and a diagonal tie screw fixedly provided at one end of the tie rod body. A tie rod hinge hole is provided at the other end of the tie rod body, and a tie rod mating hole corresponding to the tie rod hinge hole is provided on the tie rod seat 14. The screw end of the tie rod fixing bolt passes through the tie rod hinge hole and the tie rod mating hole and is threadedly sleeved with a first tie rod nut; after the first tie rod nut is tightened, the tie rod body cannot move; after the first tie rod nut is loosened, the tie rod body can swing at an angle to facilitate meeting the installation requirements; tie rod insertion holes are provided on both the upper tie rod rotating shaft 102 and the lower tie rod rotating shaft 101. The diagonal tie screw passes through the tie rod insertion hole and is threadedly sleeved with a second tie rod nut for fixing the tie rod screw. By turning the second tie rod nut, the tension of the front lower diagonal tie rod 15, the rear lower diagonal tie rod 16, the front upper diagonal tie rod 18 and the rear upper diagonal tie rod 19 can be adjusted. The first tie rod nut and the second tie rod nut are not shown in the drawings.

[0040] In this embodiment, the upper support frame 4 includes an upper support cross beam 41 and two upper support longitudinal beams 42. One of the upper support longitudinal beams 42 is fixedly connected to all the columns 11 on the left side at the same time, and the upper tie rod rotating shaft 102 is rotatably installed on the upper support longitudinal beam 42; the other upper support longitudinal beam 42 is fixedly connected to all the columns 11 on the right side of the car frame 1 at the same time. The left and right ends of the upper support cross beam 41 are respectively fixedly connected to the front ends of the two upper support longitudinal beams 42, so as to improve the stability between the two upper support longitudinal beams 42.

[0041] As a preferred embodiment, a longitudinal bottom beam 131 is commonly connected between two adjacent lower beams 13 in the middle. Side connection plates for connecting the lower beam 13 are provided at both the front and rear ends of the longitudinal bottom beam 131. Each side connection plate correspondingly connects to one lower beam 13. Side connection holes for mating with bolts are provided on the side connection plates. In this way, by correspondingly connecting one lower beam 13 with the side connection plates, the connection stability between the two car frames 1 in the middle is further improved. In addition, the top of the longitudinal bottom beam 131 is fixedly connected to the bottom of the chassis 5, so as to further strengthen the structural stability of the car frame structure.

[0042] As a preferred embodiment, guide shoe seats 6 are provided at the left and right ends of the top of the upper beam 12 and at the left and right ends of the bottom of the lower beam 13. Elevator guide shoes 7 adapted to the guide rails of the car frame 1 are provided on the guide shoe seats 6.

[0043] As a preferred embodiment, the safety gear linkage mechanism 22 includes a pulling long shaft 221, a pulling short shaft 222, a pulling arm 223, a pulling linkage rod 224, and two safety gear linkage arms 225. The pulling long shaft 221 and the pulling short shaft 222 are respectively rotatably installed at the left and right ends of the lower beam 13. The pulling arm 223 is installed at one end of the pulling long shaft 221. The pulling arm 223 is used to connect with the speed governor rope of the speed governor.

[0044] Further, each safety gear linkage arm 225 is cooperatively connected to control the operation of an elevator safety gear 21 installed on the column 11. The two safety gear linkage arms 225 are respectively installed on the pulling long shaft 221 and the pulling short shaft 222. One of the safety gear linkage arms 225 is driven to rotate by the pulling long shaft 221, and the other safety gear linkage arm 225 is driven to rotate by the pulling short shaft 222. The pulling long shaft 221 drives the pulling short shaft 222 to rotate synchronously with it through the pulling linkage rod 224. The braking synchronization rods 23 are commonly connected between the adjacent front and rear pulling long shafts 221 to make them rotate synchronously.

[0045] Still further, the pulling linkage rod 224 includes a left support rod 2241, a right support rod 2242, and a support rod long nut 2243. The left support rod 2241 includes a left hinge seat at one end and a left screw rod section at the other end. The left hinge seat is in transmission connection with the pulling long shaft 221. The right support rod 2242 includes a right hinge seat at one end and a right screw rod section at the other end. The right hinge seat is in transmission connection with the pulling short shaft 222. The two ends of the support rod long nut 2243 are respectively provided with first screw holes and second screw holes extending axially. The thread rotation directions of the first screw holes and the second screw holes are opposite. At least part of the thread of the left screw rod section is adapted to the first screw hole, and at least part of the thread of the right screw rod section is engaged in the second screw hole. By rotating the support rod long nut 2243, the length of the pulling linkage rod 224 can be quickly adjusted without disconnecting the connection with other components, simplifying the operation steps, reducing the adjustment difficulty, improving the adjustment efficiency, and reducing the time cost. Moreover, during the adjustment process, there is no need to change the connection method between the pulling linkage rod 224 and other components, ensuring the overall stability and reliability of the equipment.

[0046] As a preferred embodiment, a left swing arm 2211 that rotates synchronously with it is fixedly installed on the pulling long shaft 221. One end of the left swing arm 2211 away from the pulling long shaft 221 is hinged to the left hinge seat. A right swing arm 2221 that rotates synchronously with it is fixedly installed on the pulling short shaft 222. One end of the right swing arm 2221 away from the pulling short shaft 222 is hinged to the right hinge seat. Thus, when the pulling long shaft 221 rotates, it can drive the pulling short shaft 222 to rotate synchronously under the action of the left swing arm 2211, the pulling linkage rod 224, and the right swing arm 2221.

[0047] As a preferred embodiment, two symmetrically arranged clamp block connecting parts 2251 are provided on the safety clamp linkage arm 225. The two clamp block connecting parts 2251 are respectively connected and cooperated with the two clamp blocks of the elevator safety clamp 21, so that when the safety clamp linkage arm 225 moves, the two clamp blocks of the elevator safety clamp 21 can be driven to move, thereby realizing emergency braking.

[0048] In this embodiment, a safety clamp linkage oblong hole is provided on the clamp block connecting part 2251, and a clamp block linkage part for inserting into the safety clamp linkage oblong hole is provided on the clamp block of the elevator safety clamp 21. When the clamp block connecting part 2251 moves, it can drive the clamp block linkage part to drive the clamp block of the elevator safety clamp 21 to move. Further, the lower beam 13 includes two symmetrically arranged lower beam bodies. The front and rear ends of the lifting long shaft 221 and the lifting short shaft 222 are respectively rotatably fitted on the two lower beam bodies. The elevator safety clamp 21 is installed in the column groove of the column 11 facing away from the chassis 5. A safety braking opening for the clamp block connecting part 2251 to penetrate into the column groove is provided on the column 11.

[0049] In this embodiment, the safety clamp braking mechanism further includes a support rod reset seat 226. The support rod reset seat 226 is installed on the lower beam 13. A support rod reset through hole for the left support rod 2241 to pass through is provided on the support rod reset seat 226. A support rod reset spring 227 is sleeved on the left support rod 2241. A support rod reset nut 228 is threadedly fitted on the left screw section. The two ends of the support rod reset spring 227 are respectively limited by the support rod reset seat 226 and the support rod reset nut 228. After the lifting linkage rod 224 moves, the support rod reset spring 227 drives the lifting linkage rod 224 to reset.

[0050] The above is only the preferred embodiment of the present invention. As long as the technical solutions that achieve the purpose of the present invention by basically the same means fall within the protection scope of the present invention.

Claims

1. A car frame structure with four sets of safety clamps for use in an extra-large load freight elevator, comprising four car frames (1) arranged from front to back and four sets of safety clamp mechanisms (2) corresponding to each car frame (1), the car frame (1) comprising two columns (11) distributed on the left and right, an upper beam (12) with left and right ends respectively connected to the upper ends of the two columns (11), and a lower beam (13) with left and right ends respectively connected to the lower ends of the two columns (11); The bottoms of all the upper beams (12) are commonly connected to two longitudinal top beams (3) distributed on the left and right, and are characterized in that: All the uprights (11) are commonly connected to an upper support frame (4) located below the longitudinal top beam (3), and the tops of all the lower beams (13) are commonly connected to a chassis (5) located below the upper support frame (4); A tie rod seat (14) is provided in the middle of the column (11), and a front lower inclined tie rod (15) with a lower end inclined forward and downward and a rear lower inclined tie rod (16) with a lower end inclined backward and downward are respectively provided at the front and rear ends of the tie rod seat (14), and the upper ends of the front lower inclined tie rod (15) and the rear lower inclined tie rod (16) are both hinged on the tie rod seat (14), and the lower ends are both mounted on the chassis (5) via a lower tie rod rotating shaft (101); Two front and rear adjacent tie rod seats (14) are commonly connected to a longitudinal support rod (17) for constraining the distance between two front and rear adjacent upright posts (11).

2. A car frame structure with four sets of safety tongs applied to an extra-large load freight elevator according to claim 1, characterized in that: The safety clamp mechanism (2) comprises two elevator safety clamps (21) respectively arranged on two upright columns (11) and a safety clamp linkage mechanism (22) arranged on a lower beam (13) for linking the actions of two elevator safety clamps (21) on the same elevator frame (1), wherein two front and rear adjacent safety clamp linkage mechanisms (22) are connected in transmission by a brake synchronization rod (23) for making them work synchronously.

3. A car frame structure with four sets of safety tongs applied to an extra-large load freight elevator according to claim 1, characterized in that: The upper front end of the pull rod seat (14) is provided with a front upper inclined pull rod (18) with the upper end tilted forward and upward; the lower end of the front upper inclined pull rod (18) is hinged on the pull rod seat (14), and the upper end is mounted on the upper support frame (4) via an upper pull rod rotating shaft (102).

4. A car frame structure with four sets of safety tongs applied to an extra-large load freight elevator according to claim 3, characterized in that: At least three tie rod seats (14) have rear ends provided with rear upper inclined tie rods (19) with upper ends inclined rearward and upward; the lower ends of the rear upper inclined tie rods (19) are hinged to the tie rod seats (14), and the upper ends are mounted on the upper support frame (4) using an upper tie rod rotating shaft (102).

5. A car frame structure with four sets of safety tongs applied to an extra-large load freight elevator according to claim 4, characterized in that: The front lower diagonal tie rod (15), the rear lower diagonal tie rod (16), the front upper diagonal tie rod (18) and the rear upper diagonal tie rod (19) all include a tie rod body and an oblique tie screw fixed on one end of the tie rod body; the other end of the tie rod body is provided with a tie rod hinge hole; the tie rod seat (14) is provided with a tie rod matching hole corresponding to the tie rod hinge hole; the screw end of the tie rod fixing bolt passes through the tie rod hinge hole and the tie rod matching hole and is then threadedly fitted with a first tie rod nut; the upper tie rod rotating shaft (102) and the lower tie rod rotating shaft (101) are both provided with a tie rod insertion hole; the oblique tie screw passes through the tie rod insertion hole and is then threadedly fitted with a second tie rod nut for fixing the tie rod screw.

6. A car frame structure with four sets of safety tongs applied to an extra-large load freight elevator according to claim 1, characterized in that: The upper support frame (4) includes an upper support cross beam (41) and two upper support longitudinal beams (42). One of the upper support longitudinal beams (42) is fixedly connected to all the columns (11) on the left side at the same time, and the other upper support longitudinal beam (42) is fixedly connected to all the columns (11) on the right side of the car frame (1) at the same time. The left and right ends of the upper support cross beam (41) are respectively fixedly connected to the front ends of the two upper support longitudinal beams (42).

7. A car frame structure with four sets of safety tongs applied to an extra-large load freight elevator according to claim 1, characterized in that: A longitudinal bottom beam (131) is commonly connected between two lower beams (13) that are adjacent to each other front and back and located in the middle.

8. A car frame structure with four sets of safety gear applied to an extra-large load freight elevator according to claim 1, characterized in that: An installation space for installing the car wall is left between the upper support frame (4) and the chassis (5).

9. A car frame structure with four sets of safety tongs applied to an extra-large load freight elevator according to claim 1, characterized in that: Guide shoe seats (6) are provided at the left and right ends of the top of the upper beam (12) and at the left and right ends of the bottom of the lower beam (13). Elevator guide shoes (7) adapted to the guide rails of the car frame (1) are provided on the guide shoe seats (6).

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