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

Abstract

A car frame structure provided with two sets of safety tongs and applied to an ultra-large load cargo elevator comprises a chassis and two middle car frames arranged front and back, each middle car frame comprises two stand columns, an upper beam and a lower beam, the left end and the right end of each upper beam are connected with the upper ends of the two stand columns respectively, and the lower ends of the two stand columns are connected with the lower beams respectively. The left end and the right end of each lower beam are connected with the lower ends of the two stand columns respectively, the tops of the lower beams are jointly connected to the bottom of the chassis, the two middle car frames are each provided with a safety tongs mechanism, and a plurality of middle connecting beams arranged from left to right are arranged between the lower beams of the two middle car frames. The front end and the rear end of the middle connecting beam are fixedly connected with the lower beams of the two middle car frames respectively, and the middle connecting beam is arranged to connect the lower beams of the two middle car frames, so that the connection stability and reliability between the two middle car frames are enhanced, and potential safety hazards caused by unstable connection are effectively reduced; and the overall safety and the service life of the goods elevator are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a car frame structure with two sets of safety clamps used in an ultra-large load freight elevator. Background Art

[0002] The elevator safety clamp is a safety device that, under the control of the speed limiter, will urgently stop the elevator car and clamp it on the guide rail when a very serious fault such as overspeed or rope breakage occurs. It provides effective protection for the safe operation of the elevator and is generally installed on the freight elevator frame. The safety clamp mechanism consists of two parts: the safety clamp linkage mechanism and the elevator safety clamp. That is, when the safety clamp mechanism is activated, it first triggers the electrical mechanism to disconnect the elevator safety circuit and stop the elevator. If the brake cannot stop the elevator, the safety clamp will further operate to stop the elevator car on the guide rail.

[0003] Referring to the technical solution of patent No. 201821132855.X, existing freight elevator designs typically include at least two car frames connected by a chassis. Each car frame is equipped with a safety clamp mechanism, which includes elevator safety clamps mounted on two columns, and a safety clamp linkage mechanism that synchronizes the operation of the two safety clamps. However, this design suffers from insufficient connection stability between the car frames. This is mainly because the lower beams are connected only by the chassis, resulting in poor reliability and stability of the overall structure of the freight elevator frame. When all safety clamps are braked simultaneously, the impact force generated can easily cause deformation of the freight elevator frame. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a car frame structure with two sets of safety clamps for use in an ultra-large load freight elevator.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The camshafts are connected to the lower frame of the second frame by means of a plurality of intermediate connecting beams, the intermediate connecting beams being connected to the lower frame of the second frame and the intermediate connecting beams being connected to the lower frame of the second frame.

[0007] In the present invention, the bottoms of the upper beams of all the intermediate car frames are commonly connected to two longitudinal top beams, and the two longitudinal top beams are respectively close to the two upright columns.

[0008] In the utility model, a reinforcement frame is provided between the chassis and the longitudinal top beam, and the reinforcement frame includes a reinforced front cross beam and two longitudinal reinforcement beams, one of which is fixedly connected to all the columns of the intermediate car frames on the left side, and the other is fixedly connected to all the columns of the intermediate car frames on the right side, and the left and right ends of the reinforced front cross beam are respectively fixedly connected to the front ends of the two longitudinal reinforcement beams.

[0009] In the present invention, the chassis includes two front chassis modules that are symmetrical and connected together by bolts, and two rear chassis modules that are symmetrical and connected together by bolts. The rear side of each front chassis module is connected to the front side of a corresponding rear chassis module by bolts.

[0010] In the present invention, the bottoms of the two front chassis modules are commonly connected to at least one front counterweight module, and the bottoms of the two rear chassis modules are commonly connected to at least one rear counterweight module.

[0011] In the present invention, the top of the middle connecting beam is fixedly connected to the front chassis module and the rear chassis module corresponding to the front and rear chassis modules by means of bolt connection.

[0012] In the present invention, both front and rear ends of the middle connecting beam are provided with side connecting plates for connecting to the lower beams, each side connecting plate is connected to a corresponding lower beam, and the side connecting plates are provided with side connecting holes for fitting bolts.

[0013] In the present utility model, the safety clamp linkage mechanism includes a lifting long axis, a lifting short axis, a lifting arm, a lifting linkage rod and two safety clamp linkage arms. The lifting long axis and the lifting short axis are respectively rotatably installed on the left and right ends of the lower beam. The lifting arm is installed on one end of the lifting long axis. The lifting long axis is connected to the lifting linkage rod to drive the lifting short axis to rotate. The front and rear ends of the braking synchronization linkage rod are respectively connected to the lifting long axes of the two safety clamp braking mechanisms.

[0014] In the present utility model, the safety clamp linkage arm includes a safety clamp linkage sleeve and a safety clamp linkage part. The safety clamp linkage sleeves of the two safety clamp linkage arms are respectively fixed on the lifting long axis and the lifting short axis; one end of the safety clamp linkage part is fixed on the safety clamp linkage sleeve, and the other end is provided with two clamp block connecting parts.

[0015] The beneficial effects of this utility model are as follows: The utility model first connects the lower beams of the two intermediate car frames through the provision of an intermediate connecting beam, thereby improving structural stability, enhancing the stability and reliability of the connection between the two intermediate car frames, effectively reducing safety hazards caused by unstable connections, and improving the overall safety and service life of the freight elevator. In addition, the chassis, longitudinal top beam, and reinforcement frame are used for reinforcement to further improve the structural stability of the entire freight elevator frame, allowing the entire freight elevator to withstand higher loads and greater impact forces, meeting the needs of ultra-heavy load freight elevators. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 The three-dimensional structure of the car frame Figure 1 ;

[0018] Figure 2 The three-dimensional structure of the car frame Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the installation of the middle connecting beam;

[0020] Figure 4 It is a schematic diagram of the combination of two sets of safety gear mechanisms;

[0021] Figure 5 It is a schematic diagram of the connection between the lifting short shaft and various components;

[0022] Figure 6 This is a schematic diagram of the connection between the lifting long axis and various components;

[0023] Figure 7 Schematic diagram of the coordination between the safety clamp linkage arm and the elevator safety clamp. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0025] 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 indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only 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 specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] Reference Figure 1-7 A car frame structure with two sets of safety clamps for use in an ultra-large freight elevator comprises a chassis 1 and two intermediate car frames 2 arranged in a front-to-rear arrangement. The intermediate car frames 2 include two uprights 21, an upper beam 22, and a lower beam 23. The left and right ends of the upper beam 22 are respectively connected to the upper ends of the two uprights 21, and the left and right ends of the lower beam 23 are respectively connected to the lower ends of the two uprights 21. The tops of the lower beams 23 are connected to the bottom of the chassis 1. Each of the intermediate car frames 2 is provided with a safety clamp mechanism. The safety clamp mechanism includes two elevator safety clamps 3, respectively provided on the two uprights 21, and a safety clamp linkage mechanism 4 that synchronizes the two elevator safety clamps 3. A brake synchronization linkage rod 40 is used between the safety clamp linkage mechanisms 4 to synchronize their operation. A plurality of intermediate connecting beams 5 are arranged from left to right between the lower beams 23 of the two intermediate car frames 2. The front and rear ends of the intermediate connecting beams 5 are respectively fixedly connected to the lower beams 23 of the two intermediate car frames 2.

[0028] The utility model provides an intermediate connecting beam 5 to connect the lower beams 23 of the two intermediate car frames 2, thereby improving the structural stability, enhancing the connection stability and reliability between the two intermediate car frames 2, effectively reducing the safety hazards caused by unstable connection, and improving the overall safety and service life of the freight elevator.

[0029] In this embodiment, the bottoms of the upper beams 22 of all intermediate car frames 2 are commonly connected to two longitudinal top beams 6, and the two longitudinal top beams 6 are respectively close to two upright posts 21. Furthermore, a reinforcement frame 7 is provided between the chassis 1 and the longitudinal top beams 6. The reinforcement frame 7 includes a reinforcement front cross beam 71 and two longitudinal reinforcement beams 72. One longitudinal reinforcement beam 72 is simultaneously fixedly connected to the upright posts 21 on the left side of all intermediate car frames 2, and the other longitudinal reinforcement beam 72 is simultaneously fixedly connected to the upright posts 21 on the right side of all intermediate car frames 2. The left and right ends of the reinforcement front cross beam 71 are respectively fixedly connected to the front ends of the two longitudinal reinforcement beams 72, thereby improving the stability between the two longitudinal reinforcement beams 72. The upper beams 22 of all the intermediate car frames 2 are connected together by two longitudinal top beams 6 respectively close to the two columns 21, so as to improve the stability of the combined connection between the upper beams 22 of the intermediate car frames 2, and then the chassis 1 is fixed on the top of the lower beams 23 of all the intermediate car frames 2, so that the lower beams 23 of all the intermediate car frames 2 are combined and fixed together, and then the reinforcing frame is used to reinforce the columns 21, thereby improving the structural stability of the entire freight elevator frame, so that the entire freight elevator can withstand higher loads and meet the use requirements of super-large load freight elevators.

[0030] In this embodiment, a tie rod mounting seat 24 is provided on the middle part of the column 21, a front lower oblique tie rod 25 and a front upper oblique tie rod 26 are provided at the front end of the tie rod mounting seat 24, and a rear lower oblique tie rod 27 and a rear upper oblique tie rod 28 are provided at the rear end, wherein the front lower oblique tie rod 25 is arranged to be tilted forward and downward, and the rear lower oblique tie rod 27 is arranged to be tilted backward and downward; the upper ends of the front lower oblique tie rod 25 and the rear lower oblique tie rod 27 are both hinged to the tie rod mounting seat 24 The upper and lower ends are both mounted on the chassis 1 through a lower tie rod shaft; the front upper diagonal tie rod 26 is tilted forward and upward, the lower end of the front upper diagonal tie rod 26 is hinged on the tie rod mounting seat 24, and the upper end is mounted on the longitudinal reinforcement beam 72 through an upper tie rod shaft; the rear upper diagonal tie rod 28 is tilted backward and upward, the lower end of the rear upper diagonal tie rod 28 is hinged on the tie rod mounting seat 24, and the upper end is mounted on the longitudinal reinforcement beam 72 using an upper tie rod shaft.

[0031] Furthermore, a longitudinal push rod is provided between the two adjacent front and rear columns 21, and the front and rear ends of the longitudinal push rod are respectively connected to the pull rod mounting seats 24 of the two columns 21. The longitudinal push rod is used to constrain the distance between the two adjacent front and rear columns 21, thereby reducing the probability of deformation and bending of the middle part of the column 21.

[0032] By arranging the front lower diagonal tie rod 25, the rear lower diagonal tie rod 27, the longitudinal top rod, the front upper diagonal tie rod 26 and the rear upper diagonal tie rod 28, the connection strength between each intermediate car frame 2 can be effectively improved, thereby enhancing the structural stability of the freight elevator frame, so that the entire freight elevator can withstand a higher load and meet the use requirements of an extra-large load freight elevator.

[0033] As a preferred embodiment, the chassis 1 includes two symmetrical front chassis modules 11 bolted together, and two symmetrical rear chassis modules 12 bolted together. The rear side of each front chassis module 11 is bolted to the front side of a corresponding rear chassis module 12, thereby combining the two front chassis modules 11 and the two rear chassis modules 12 to form the chassis 1. Furthermore, at least one front counterweight module 13 is commonly connected to the bottoms of the two front chassis modules 11, and at least one rear counterweight module 14 is commonly connected to the bottoms of the two rear chassis modules 12. The front counterweight modules 13 and the rear counterweight modules 14 increase the overall weight of the elevator car, improve traction, and ensure the stability of the freight elevator during operation. Furthermore, because the front counterweight module 13 connects to the two front chassis modules 11 and the rear counterweight module 14 connects to the two rear chassis modules 12, the combined stability between the two front chassis modules 11 and the two rear chassis modules 12 is improved, further enhancing the stability of the chassis 1.

[0034] As a preferred embodiment, the top of the intermediate connecting beam 5 is fixedly connected to the corresponding front and rear chassis modules 11 and 12 by bolting, thereby allowing the intermediate connecting beam 5 to enhance the connection stability between the front and rear chassis modules 11, 12. Furthermore, the front and rear ends of the intermediate connecting beam 5 are each provided with a side connecting plate 51 for connecting to the lower beams 23. Each side connecting plate 51 is connected to a corresponding lower beam 23, and the side connecting plates 51 are provided with side connecting holes for receiving bolts. By connecting the side connecting plates 51 to a corresponding lower beam 23, the connection stability between the front and rear chassis modules 11, 12 is further enhanced.

[0035] As a preferred embodiment, the safety clamp linkage mechanism 4 includes a lifting long shaft 41, a lifting short shaft 42, a lifting arm 43, a lifting linkage rod 44 and two safety clamp linkage arms 45. The lifting long shaft 41 and the lifting short shaft 42 are rotatably mounted on the left and right ends of the lower beam 23 respectively. The lifting arm 43 is mounted on one end of the lifting long shaft 41. The lifting arm 43 is used to connect with the speed limiter rope of the speed limiter. When the freight elevator has an abnormality, the speed limiter is actuated to cause the rope clamp to clamp the speed limiter rope. As the freight elevator frame continues to move, The speed governor rope is linked to the lifting arm 43, which drives the lifting shaft 41 to rotate, thereby activating the safety gear linkage mechanism 4. Each safety gear linkage arm 45 cooperates with and controls the operation of an elevator safety gear 3 mounted on the column 21. The two safety gear linkage arms 45 are respectively mounted on the lifting shaft 41 and the lifting short shaft 42. One safety linkage arm is driven to rotate by the lifting shaft 41, and the other safety gear linkage arm 45 is driven to rotate by the lifting short shaft 42. The lifting shaft 41 is connected to the lifting short shaft 42 via the lifting linkage rod 44. The front and rear ends of the brake synchronization linkage rod 40 are respectively connected to the lifting shafts 41 of the two safety gear brake mechanisms to ensure their synchronous rotation.

[0036] Furthermore, the safety clamp linkage arm 45 includes a safety clamp linkage sleeve 451 and a safety clamp linkage part 452. The safety clamp linkage sleeves 451 of the two safety clamp linkage arms 45 are respectively fixed on the lifting long shaft 41 and the lifting short shaft 42; one end of the safety clamp linkage part 452 is fixed on the safety clamp linkage sleeve 451, and the other end is integrally formed with two clamp block connecting parts 453 arranged symmetrically front and back. The two clamp block connecting parts 453 are respectively connected and cooperated with the two clamp blocks of the elevator safety clamp 3, so that when the safety clamp linkage arm 45 is actuated, the two clamp blocks of the elevator safety clamp 3 can be linked to move, thereby realizing emergency braking.

[0037] In this embodiment, the safety clamp linkage part 452 and the two clamp block connecting parts 453 form a "Y" structure, and the clamp block connecting part 453 is provided with a safety clamp linkage oblong hole, and the clamp block of the elevator safety clamp 3 is provided with a clamp block linkage part for inserting into the safety clamp linkage oblong hole. When the clamp block connecting part 453 is actuated, it can link the clamp block linkage part to drive the clamp block of the elevator safety clamp 3 to move.

[0038] In this embodiment, a brake connection hole is provided in the brake synchronization linkage rod 40 for inserting one end of the lifting long shaft 41. After one end of the lifting long shaft 41 is inserted into the brake connection hole, it is fixedly connected to the brake synchronization linkage rod 40 by bolt connection or welding, so that the lifting long shaft 41 and the brake synchronization linkage rod 40 are fixed together.

[0039] In this embodiment, the lifting linkage rod 44 includes a left brake strut 441, a right brake strut 442 and a strut connecting long nut 443, the left brake strut 441 includes a left strut hinge seat at one end thereof and a left strut screw segment at the other end thereof, the right brake strut 442 includes a right strut hinge seat at one end thereof and a right strut screw segment at the other end thereof, the lifting long shaft 41 is fixedly mounted with a left strut rocker arm 411 which is driven to rotate thereby, and the left strut rocker arm 411 is hinged to the left strut hinge seat at one end away from the lifting long shaft 41; the lifting short shaft 42 is fixedly mounted with a right strut rocker arm 421 which is driven to rotate thereby, and the right strut rocker arm 421 is hinged to the right strut hinge seat at one end away from the lifting short shaft 42 The rod articulated seat is hinged; the two ends of the support rod connecting long nut 443 are respectively provided with a first screw hole and a second screw hole extending along the axial direction, the thread rotation direction of the first screw hole and the thread rotation direction of the second screw hole are opposite, and the left support rod screw segment has at least a part of the thread adapted to the first screw hole, and the right support rod screw segment has at least a part of the thread fitted in the second screw hole; by rotating the support rod connecting long nut 443, the left brake support rod 441 and the right brake support rod 442 can be moved toward and away from each other to adjust the distance between the left brake support rod 441 and the right brake support rod 442, thereby changing the length of the brake synchronization linkage rod 40, so as to better synchronize the two safety clamp linkage arms 45 of the same safety clamp linkage mechanism 4.

[0040] In this embodiment, the lower beam 23 includes two front-to-back symmetrical lower beam bodies, and a swing space is formed between the two lower beam bodies. One end of the safety clamp linkage arm 45 is located in the swing space. The length of the left brake strut 441 is greater than the length of the right brake strut 442. The safety clamp braking mechanism also includes at least one strut support member 46, which is installed on one of the lower beam bodies. The strut support member 46 is provided with a strut bracket groove for the left brake strut 441 to pass through. The strut support member 46 is used to support the left brake strut 441 to avoid the problem of the left brake strut 441 being too long and bending.

[0041] In this embodiment, the lifting long shaft 41 and the lifting short shaft 42 are each provided with two lifting shaft seats 47, and the two lifting shaft seats 47 are respectively fixedly mounted on the two lower beam bodies of the lower beam 23, and the lifting long shaft 41 and the lifting short shaft 42 can both rotate relative to the lifting shaft seats 47; a column groove is provided on the side of the column 21 facing away from the chassis 1, and the elevator safety clamp 3 is located in the column groove, and a safety clamp linkage port connected to the column groove is provided on the side of the column 21 facing the chassis 1, and the clamp block connecting part 453 passes through the safety clamp linkage port and enters the column groove, thereby cooperating with the elevator safety clamp 3.

[0042] In this embodiment, the safety caliper brake mechanism further includes a strut reset seat 481 mounted on one of the lower beams. The strut reset seat 481 is provided with a strut reset through-hole for the left brake strut 441 to pass through. A strut reset spring 482 is mounted on the left brake strut 441. A strut reset nut 483 is threadedly engaged with the left strut threaded section. The ends of the strut reset spring 482 are respectively restrained by the strut reset seat 481 and the strut reset nut 483. After the lifting linkage rod 44 is actuated, the strut reset spring 482 drives the lifting linkage rod 44 to reset.

[0043] The above descriptions are merely preferred embodiments of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the scope of protection of the present invention.

Claims

1. A car frame structure with two sets of safety clamps for use in an ultra-large load freight elevator, comprising a chassis (1) and two intermediate car frames (2) arranged front and back, the intermediate car frames (2) comprising two uprights (21), an upper beam (22) and a lower beam (23), the left and right ends of the upper beam (22) being respectively connected to the upper ends of the two uprights (21), the left and right ends of the lower beam (23) being respectively connected to the lower ends of the two uprights (21), and the top of the lower beam (23) being jointly connected to the bottom of the chassis (1); a set of safety clamp mechanisms being respectively provided on the two intermediate car frames (2), the safety clamp mechanisms comprising two elevator safety clamps (3) respectively provided on the two uprights (21) and a safety clamp linkage mechanism (4) for linking the two elevator safety clamps (3) to work synchronously, a brake synchronization linkage rod (40) being used between the safety clamp linkage mechanisms (4) of the two sets of safety clamp mechanisms to enable them to work synchronously, and characterized in that: A plurality of intermediate connecting beams (5) are arranged from left to right between the lower beams (23) of the two intermediate car frames (2), and the front and rear ends of the intermediate connecting beams (5) are respectively fixedly connected to the lower beams (23) of the two intermediate car frames (2).

2. The car frame structure with two sets of safety gears used in an extra-large freight elevator according to claim 1, characterized in that: The bottoms of the upper beams (22) of all the intermediate car frames (2) are commonly connected to two longitudinal top beams (6), and the two longitudinal top beams (6) are respectively close to the two upright posts (21).

3. The car frame structure with two sets of safety clamps used in an extra-large load freight elevator according to claim 2, characterized in that: A reinforcement frame (7) is provided between the chassis (1) and the longitudinal top beam (6), the reinforcement frame (7) comprising a reinforcement front cross beam (71) and two longitudinal reinforcement beams (72), one of the longitudinal reinforcement beams (72) being simultaneously fixedly connected to the left-side uprights (21) of all the intermediate car frames (2), and the other longitudinal reinforcement beam (72) being simultaneously fixedly connected to the right-side uprights (21) of all the intermediate car frames (2), and the left and right ends of the reinforcement front cross beam (71) being respectively fixedly connected to the front ends of the two longitudinal reinforcement beams (72).

4. The car frame structure with two sets of safety clamps used in an extra-large load freight elevator according to claim 1, characterized in that: The chassis (1) comprises two front chassis modules (11) that are symmetrical and connected together by bolt connection, and two rear chassis modules (12) that are symmetrical and connected together by bolt connection, wherein the rear side of each front chassis module (11) is connected to the front side of a corresponding rear chassis module (12) by bolt connection.

5. The car frame structure with two sets of safety clamps used in an extra-large load freight elevator according to claim 4, characterized in that: The bottoms of the two front chassis modules (11) are commonly connected to at least one front counterweight module (13), and the bottoms of the two rear chassis modules (12) are commonly connected to at least one rear counterweight module (14).

6. The car frame structure with two sets of safety clamps used in an extra-large load freight elevator according to claim 4, characterized in that: The top of the middle connecting beam (5) is fixedly connected to the front chassis module (11) and the rear chassis module (12) corresponding to the front and rear chassis modules by means of bolt connection.

7. The car frame structure with two sets of safety gears used in an extra-large freight elevator according to claim 1, characterized in that: The front and rear ends of the middle connecting beam (5) are both provided with side connecting plates (51) for connecting to the lower beams (23), each side connecting plate (51) correspondingly connected to one lower beam (23), and the side connecting plates (51) are provided with side connecting holes for fitting bolts.

8. The car frame structure with two sets of safety gears used in an extra-large freight elevator according to claim 1, characterized in that: The safety clamp linkage mechanism (4) includes a lifting long shaft (41), a lifting short shaft (42), a lifting arm (43), a lifting linkage rod (44) and two safety clamp linkage arms (45). The lifting long shaft (41) and the lifting short shaft (42) are rotatably mounted on the left and right ends of the lower beam (23), respectively. The lifting arm (43) is mounted on one end of the lifting long shaft (41). The lifting long shaft (41) is connected to the lifting linkage rod (44) to drive the lifting short shaft (42) to rotate. The front and rear ends of the braking synchronization linkage rod (40) are respectively connected to the lifting long shafts (41) of the two safety clamp braking mechanisms.

9. The car frame structure with two sets of safety gears used in an extra-large load freight elevator according to claim 8, characterized in that: The safety clamp linkage arm (45) comprises a safety clamp linkage sleeve (451) and a safety clamp linkage portion (452). The safety clamp linkage sleeves (451) of the two safety clamp linkage arms (45) are respectively sleeved and fixed on the lifting long shaft (41) and the lifting short shaft (42). One end of the safety clamp linkage portion (452) is fixed on the safety clamp linkage sleeve (451), and the other end is provided with two clamp block connecting portions (453).

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