An elevator safety gear lifting device

Abstract

The present invention discloses an elevator safety gear lifting device, which includes a governor wire rope and a governor lifting rod; the governor wire rope is connected to the long handle end of the governor lifting rod; the short handle end of the governor lifting rod is hinged with a first swing assembly and / or a second swing assembly; the short handle end of the governor lifting rod is connected with a third swing assembly and / or a fourth swing assembly through a linkage assembly; the first swing assembly, the second swing assembly, the third swing assembly and the fourth swing assembly are respectively connected with a first safety gear, a second safety gear, a third safety gear and a fourth safety gear; an action switch for cutting off the elevator safety circuit is installed on the linkage assembly; by changing the number of swing rods, connecting rods and safety gear lifting rods, the present invention can realize a double-lifting point or four-lifting point structure. When it is a four-lifting point structure, the synchronism of the safety gear lifting can be realized by changing the initial installation position of the governor lifting rod or the rod length relationship of the swing rod and the connecting rod.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and particularly to an elevator safety gear lifting device. Background Art

[0002] Currently, the mainstream elevators are usually equipped with spring-limited lifting devices. The main structures include a lifting shaft, a linkage shaft, a spring, etc., which occupy a large space. When applied to machine-roomless elevators, they are generally installed in layers with the counterweight sheaves under the car bottom and fixed by the car bottom cross beam. The spring-limited lifting device occupies a large space. When applied to machine-roomless elevators, it makes the car bottom structure very complex, has higher requirements for the depth of the hoistway pit, affects the costs of the elevator and the civil engineering, and does not conform to the concept of economy and simplicity. Summary of the Invention

[0003] The purpose of the present invention is to provide an elevator safety gear lifting device, which overcomes the drawback of the previous spring-limited lifting device occupying a large space. When applied to machine-roomless elevators, only one lifting shaft is arranged under the car bottom, making the car bottom structure more concise and reducing the requirements for the depth of the hoistway pit. By changing the number of swing rods, connecting rods and safety gear lifting rods, a double-lifting-point or four-lifting-point structure can be realized. When it is a four-lifting-point structure, the synchronism of the safety gear lifting can be realized by changing the initial installation position of the governor lifting rod or the rod length relationship of the swing rod and the connecting rod.

[0004] The present invention is realized by the following technical solutions:

[0005] An elevator safety gear lifting device includes a governor wire rope and a governor lifting rod; the governor wire rope is connected to the long handle end of the governor lifting rod; wherein: the short handle end of the governor lifting rod is hinged with a first swing assembly and / or a second swing assembly; the short handle end of the governor lifting rod is connected with a third swing assembly and / or a fourth swing assembly through a linkage assembly; the first swing assembly, the second swing assembly, the third swing assembly and the fourth swing assembly are respectively hinged on a first column, a second column, a third column and a fourth column; the first swing assembly, the second swing assembly, the third swing assembly and the fourth swing assembly are respectively connected with a first safety gear, a second safety gear, a third safety gear and a fourth safety gear; an action switch for cutting off the elevator safety circuit is installed on the linkage assembly.

[0006] Further, the short handle end of the governor lifting rod is hinged with a first swing assembly; the short handle end of the governor lifting rod is connected with a third swing assembly through a linkage assembly; the first swing assembly and the third swing assembly are respectively hinged on the first column and the third column; the first swing assembly and the third swing assembly are respectively connected with a first safety gear and a third safety gear; an action switch for cutting off the elevator safety circuit is installed on the linkage assembly.

[0007] Further, the linkage assembly includes a linkage shaft, a linkage rod, a torsion spring and a torsion spring seat; the linkage shaft passes through the torsion spring; one end of the linkage shaft is connected to the short handle end of the speed limiter pull rod, and the other end is connected to the linkage rod; the linkage rod is respectively hinged to the third swing assembly and / or the fourth swing assembly; one end of the torsion spring is fixed on the linkage shaft, and the other end is fixed on the elevator car bottom through the torsion spring seat.

[0008] Further, the first swing assembly includes a first swing rod, a first connecting rod and a first safety clamp pull rod; one end of the first swing rod is hinged to the short handle end of the speed limiter pull rod, and the other end is hinged to one end of the first connecting rod; the other end of the first connecting rod is hinged to one end of the first safety clamp pull rod; the other end of the first safety clamp pull rod is connected to the first safety clamp; the middle of the first connecting rod is hinged to the first column through a first support.

[0009] Further, the second swing assembly includes a second swing rod, a second connecting rod and a second safety clamp pull rod; one end of the second swing rod is hinged to the short handle end of the speed limiter pull rod, and the other end is hinged to one end of the second connecting rod; the other end of the second connecting rod is hinged to one end of the second safety clamp pull rod; the other end of the second safety clamp pull rod is connected to the second safety clamp; the middle of the second connecting rod is hinged to the second column through a second support.

[0010] Further, the third swing assembly includes a third swing rod, a third connecting rod and a third safety clamp pull rod; one end of the third swing rod is hinged to one end of the linkage rod, and the other end is hinged to one end of the third connecting rod; the other end of the third connecting rod is hinged to one end of the third safety clamp pull rod; the other end of the third safety clamp pull rod is connected to the third safety clamp; the middle of the third connecting rod is hinged to the third column through a third support.

[0011] Further, the fourth swing assembly includes a fourth swing rod, a fourth connecting rod and a fourth safety clamp pull rod; one end of the fourth swing rod is hinged to one end of the linkage rod, and the other end is hinged to one end of the fourth connecting rod; the other end of the fourth connecting rod is hinged to one end of the fourth safety clamp pull rod; the other end of the fourth safety clamp pull rod is connected to the fourth safety clamp; the middle of the fourth connecting rod is hinged to the fourth column through a fourth support.

[0012] Further, the action switch includes a switch hitting plate, a safety switch and a switch bracket; the switch hitting plate is installed on the linkage shaft; the switch hitting plate contacts the safety switch through the rotation of the linkage shaft; the safety switch is installed on the elevator car bottom through the switch bracket; the safety switch is electrically connected to the safety circuit of the elevator.

[0013] Further, when the initial installation position of the speed limiter lifting rod is horizontal, the rod lengths of the first swing rod and the second swing rod are not equal; the rod lengths of the first connecting rod and the second connecting rod are not equal.

[0014] Further, when the angles between the initial installation position and the finally lifted position of the speed limiter lifting rod and the horizontal plane are equal respectively, the rod lengths of the first swing rod and the second swing rod are equal, and the rod lengths of the first connecting rod and the second connecting rod are equal.

[0015] Advantages of the present invention:

[0016] The present invention is provided with a speed limiter wire rope and a speed limiter lifting rod; the speed limiter wire rope is connected to the long handle end of the speed limiter lifting rod; the short handle end of the speed limiter lifting rod is hinged with a first swing assembly and / or a second swing assembly; the short handle end of the speed limiter lifting rod is connected with a third swing assembly and / or a fourth swing assembly through a linkage assembly; an action switch for cutting off the elevator safety circuit is installed on the linkage assembly. The present invention overcomes the drawback that the conventional spring limit type lifting device occupies a large space. When applied to a machine-roomless elevator, only one lifting shaft is arranged under the car bottom, making the car bottom structure more concise and reducing the requirement for the depth of the hoistway pit. By changing the number of swing rods, connecting rods and safety tongs lifting rods, a double-lifting point or four-lifting point structure can be realized. When it is a four-lifting point structure, the synchronism of the safety tongs lifting can be realized by changing the initial installation position of the speed limiter lifting rod or the rod length relationship of the swing rod and the connecting rod. Description of the drawings

[0017] Figure 1 It is a general assembly schematic diagram of a kind of elevator safety tongs lifting device (four-lifting points) in Embodiment 1 of the present invention;

[0018] Figure 2 It is Figure 1 An enlarged schematic diagram of part A;

[0019] Figure 3 It is a principle schematic diagram of a kind of elevator safety tongs lifting device (four-lifting points) in an embodiment of the present invention;

[0020] Figure 4.1 It is Figure 3 View B-1 (the speed limiter lifting rod is horizontally installed);

[0021] Figure 4.2 It is Figure 3 View B-2 (the speed limiter lifting rod is inclinedly installed);

[0022] Figure 5 It is a general assembly schematic diagram of a kind of elevator safety tongs lifting device (double-lifting points) in Embodiment 2 of the present invention.

[0023] In the accompanying drawings: 1 - speed limiter lifting rod; 2.1 - swing rod; 2.2 - swing rod; 2.3 - swing rod; 2.4 - swing rod; 3.1 - connecting rod; 3.2 - connecting rod; 3.3 - connecting rod; 3.4 - connecting rod; 4.1 - safety gear lifting rod; 4.2 - safety gear lifting rod; 4.3 - safety gear lifting rod; 4.4 - safety gear lifting rod; 5 - linkage shaft; 6 - linkage rod; 7 - torsion spring; 8 - torsion spring seat; 9.1 - safety gear; 9.2 - safety gear; 9.3 - safety gear; 9.4 - safety gear; 10.1 - column; 10.2 - column; 10.3 - column; 10.4 - column; 11 - switch striking plate; 12 - safety switch; 13 - switch bracket; 14 - speed limiter wire rope. Detailed implementation mode

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Here, the schematic embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, upper end, lower end, top, bottom,...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0026] In the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, in the present invention, descriptions such as "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions conflicts or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0028] An elevator safety gear lifting device, comprising a governor wire rope and a governor lifting rod; the governor wire rope is connected to the long handle end of the governor lifting rod; wherein: a first swing assembly and / or a second swing assembly are hinged to the short handle end of the governor lifting rod; the short handle end of the governor lifting rod is connected with a third swing assembly and / or a fourth swing assembly through a linkage assembly; the first swing assembly, the second swing assembly, the third swing assembly and the fourth swing assembly are respectively hinged to a first column, a second column, a third column and a fourth column; the first swing assembly, the second swing assembly, the third swing assembly and the fourth swing assembly are respectively connected with a first safety gear, a second safety gear, a third safety gear and a fourth safety gear; an action switch for cutting off the elevator safety circuit is installed on the linkage assembly.

[0029] Specifically, in the solution of this embodiment, a first swing assembly is hinged to the short handle end of the governor lifting rod; the short handle end of the governor lifting rod is connected with a third swing assembly through a linkage assembly; the first swing assembly and the third swing assembly are respectively hinged to the first column and the third column; the first swing assembly and the third swing assembly are respectively connected with a first safety gear and a third safety gear; an action switch for cutting off the elevator safety circuit is installed on the linkage assembly.

[0030] Specifically, in the solution of this embodiment, the linkage assembly includes a linkage shaft, a linkage rod, a torsion spring and a torsion spring seat; the linkage shaft passes through the torsion spring; one end of the linkage shaft is connected to the short handle end of the governor lifting rod, and the other end is connected to the linkage rod; the linkage rod is respectively hinged to the third swing assembly and / or the fourth swing assembly; one end of the torsion spring is fixed on the linkage shaft, and the other end is fixed on the elevator car bottom through the torsion spring seat.

[0031] Specifically, in the solution of this embodiment, the first swing assembly includes a first swing rod, a first connecting rod and a first safety gear lifting rod; one end of the first swing rod is hinged to the short handle end of the governor lifting rod, and the other end is hinged to one end of the first connecting rod; the other end of the first connecting rod is hinged to one end of the first safety gear lifting rod; the other end of the first safety gear lifting rod is connected with the first safety gear; the middle of the first connecting rod is hinged to the first column through a first support.

[0032] Specifically, in the solution of this embodiment, the second swing assembly includes a second swing rod, a second connecting rod and a second safety gear lifting rod; one end of the second swing rod is hinged to the short handle end of the governor lifting rod, and the other end is hinged to one end of the second connecting rod; the other end of the second connecting rod is hinged to one end of the second safety gear lifting rod; the other end of the second safety gear lifting rod is connected with the second safety gear; the middle of the second connecting rod is hinged to the second column through a second support.

[0033] Specifically, in the solution of this embodiment, the third swing assembly includes a third swing rod, a third connecting rod, and a third safety tong lifting rod; one end of the third swing rod is hinged to one end of the linkage rod, and the other end is hinged to one end of the third connecting rod; the other end of the third connecting rod is hinged to one end of the third safety tong lifting rod; the other end of the third safety tong lifting rod is connected to the third safety tong; the middle of the third connecting rod is hinged to the third column through a third support.

[0034] Specifically, in the solution of this embodiment, the fourth swing assembly includes a fourth swing rod, a fourth connecting rod, and a fourth safety tong lifting rod; one end of the fourth swing rod is hinged to one end of the linkage rod, and the other end is hinged to one end of the fourth connecting rod; the other end of the fourth connecting rod is hinged to one end of the fourth safety tong lifting rod; the other end of the fourth safety tong lifting rod is connected to the fourth safety tong; the middle of the fourth connecting rod is hinged to the fourth column through a fourth support.

[0035] Specifically, in the solution of this embodiment, the action switch includes a switch hitting plate, a safety switch, and a switch bracket; the switch hitting plate is installed on the linkage shaft; the switch hitting plate contacts the safety switch through the rotation of the linkage shaft; the safety switch is installed on the bottom of the elevator car through the switch bracket; the safety switch is electrically connected to the safety circuit of the elevator.

[0036] Specifically, in the solution of this embodiment, when the initial installation position of the speed limiter lifting rod is horizontal, the rod lengths of the first swing rod and the second swing rod are not equal; the rod lengths of the first connecting rod and the second connecting rod are not equal.

[0037] Specifically, in the solution of this embodiment, when the angles between the initial installation position and the finally lifted position of the speed limiter lifting rod and the horizontal plane are equal respectively, the rod lengths of the first swing rod and the second swing rod are equal, and the rod lengths of the first connecting rod and the second connecting rod are equal.

[0038] Embodiment 1:

[0039] As Figure 1 , Figure 2 and Figure 3As shown in the figure, an elevator safety gear lifting device has a four-lifting-point structure, including a speed governor lifting rod 1, swing rods 2.1, 2.2, 2.3, 2.4, connecting rods 3.1, 3.2, 3.3, 3.4, safety gear lifting rods 4.1, 4.2, 4.3, 4.4, a linkage shaft 5, a linkage rod 6, torsion springs 7, torsion spring seats 8, safety gears 9.1, 9.2, 9.3, 9.4, columns 10.1, 10.2, 10.3, 10.4, a switch striking plate 11, a safety switch 12, a switch bracket 13, and a speed governor wire rope 14. There are hinge connections between the speed governor lifting rod 1, the swing rods, the connecting rods, the safety gear lifting rods, and the linkage rod 6, and a rigid connection between the speed governor lifting rod 1, the linkage shaft 5, and the linkage rod 6; the connecting rods 3.1, 3.2, 3.3, 3.4 can rotate around supports a, b, c, d respectively, and the linkage shaft 5 can rotate around supports e, f along its own axis.

[0040] As Figure 1 shown, the symmetry center planes of the swing rods, the connecting rods, and the safety gear lifting rods are parallel to the bottom surface of the column and are located on the vertical facade of the elevator car bottom. Among them, the connecting rods 3.1, 3.2, 3.3, 3.4 are respectively hinged on the columns 10.1, 10.2, 10.3, 10.4; the linkage shaft 5 is located below the car bottom.

[0041] As Figure 3 shown, when the speed governor lifting rod 1 is lifted upward by the speed governor wire rope 14, it drives the swing rods 2.1 and 2.2 to move downward horizontally. Then, the connecting rod 3.1 rotates counterclockwise around the support a, driving the safety gear lifting rod 4.1 to lift the safety gear 9.1, and the connecting rod 3.2 rotates clockwise around the support b, driving the safety gear lifting rod 4.2 to lift the safety gear 9.2; at the same time, the linkage shaft 5 rigidly connected to the speed governor lifting rod 1 drives the linkage rod 6 to rotate counterclockwise along its own axis. The swing rods 2.3 and 2.4 move downward horizontally. Then, the connecting rod 3.3 rotates counterclockwise around the support c, driving the safety gear lifting rod 4.3 to lift the safety gear 9.3, and the connecting rod 3.4 rotates clockwise around the support d, driving the safety gear lifting rod 4.4 to lift the safety gear 9.4.

[0042] As Figure 2 shown, when the linkage shaft 5 rotates counterclockwise, the torsion spring 7 is twisted, and the switch striking plate 11 fixed on the linkage shaft 5 also rotates counterclockwise and contacts the safety switch 12, cutting off the safety circuit of the elevator; when the elevator is running normally, the inertial disturbance of the speed governor wire rope 14 itself will be absorbed by the torsion spring 7, and it will not cause the misoperation of the safety gear. One end of the torsion spring 7 is fixed on the linkage shaft 5, and the other end is fixed on the elevator car bottom through the torsion spring seat 8. The safety switch 12 is fixed on the elevator car bottom through the switch bracket 13.

[0043] As Figure 4.1 shown, when the initial installation position of the speed limiter lifting rod 1 is horizontal, the rod lengths of the swing rod 2.1 and the swing rod 2.2 should not be equal, and the rod lengths of the connecting rod 3.1 and the connecting rod 3.2 should also not be equal to ensure that the safety tongs 9.1 and the safety tongs 9.2 are lifted by the same stroke. Note: The dimensions in the attached drawings: swing rod 2.1 (531), swing rod 2.2 (525), connecting rod 3.1 (295), connecting rod 3.2 (325) are only for illustrative purposes and are not limiting conditions.

[0044] As Figure 4.2 shown, when the angles between the initial installation position and the finally lifted position of the speed limiter lifting rod 1 and the horizontal plane are equal, the rod lengths of the swing rod 2.1 and the swing rod 2.2, and the connecting rod 3.1 and the connecting rod 3.2 are respectively equal, and the safety tongs 9.1 and the safety tongs 9.2 can also be lifted by the same stroke.

[0045] Embodiment 2:

[0046] As Figure 5 shown, when applied to the car frame of double safety tongs, the safety tongs lifting device can be simplified to a double-lifting point structure, including a speed limiter lifting rod 1, a swing rod 2.1, a swing rod 2.3, a connecting rod 3.1, a connecting rod 3.3, a safety tongs lifting rod 4.1, a safety tongs lifting rod 4.3, a linkage shaft 5, a linkage rod 6, a torsion spring 7, a torsion spring seat 8, a safety tongs 9.1, a safety tongs 9.3, a column 10.1, a column 10.3, a switch striking plate 11, a safety switch 12, a switch bracket 13, and a speed limiter wire rope 14. Its principle is the same as that of the four-lifting point structure and will not be elaborated here.

[0047] The present invention overcomes the drawback that the conventional spring-limited lifting device occupies a large space. When applied to a machine-roomless elevator, only one lifting shaft is arranged under the car bottom, making the car bottom structure more concise and reducing the requirement for the depth of the hoistway pit. By changing the number of swing rods, connecting rods, and safety tongs lifting rods, a double-lifting point or four-lifting point structure can be achieved. When it is a four-lifting point structure, the synchronism of the safety tongs lifting can be achieved by changing the initial installation position of the speed limiter lifting rod or the rod length relationship of the swing rod and the connecting rod.

[0048] The technical solutions provided by the embodiments of the present invention have been introduced in detail above. Specific examples are used herein to elaborate on the principles and implementation manners of the embodiments of the present invention. The descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; at the same time, for those of ordinary skill in the art, according to the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An elevator safety gear lifting device, comprising a governor wire rope and a governor lifting rod; the governor wire rope is connected to the long handle end of the governor lifting rod; characterized in that: The short handle end of the speed limiter lifting rod is hinged with a first swing assembly and / or a second swing assembly; the short handle end of the speed limiter lifting rod is connected with a third swing assembly and / or a fourth swing assembly through a linkage assembly; the first swing assembly, the second swing assembly, the third swing assembly and the fourth swing assembly are respectively hinged to the first column, the second column, the third column and the fourth column; the first swing assembly, the second swing assembly, the third swing assembly and the fourth swing assembly are respectively connected with a first safety clamp, a second safety clamp, a third safety clamp and a fourth safety clamp; an action switch for cutting off the elevator safety circuit is installed on the linkage assembly; The first swing assembly includes a first swing rod, a first connecting rod and a first safety clamp lifting rod; one end of the first swing rod is hinged to the short handle end of the speed limiter lifting rod, and the other end is hinged to one end of the first connecting rod; the other end of the first connecting rod is hinged to one end of the first safety clamp lifting rod; the other end of the first safety clamp lifting rod is connected with the first safety clamp; the middle part of the first connecting rod is hinged to the first column through a first support; the second swing assembly includes a second swing rod, a second connecting rod and a second safety clamp lifting rod; one end of the second swing rod is hinged to the short handle end of the speed limiter lifting rod, and the other end is hinged to one end of the second connecting rod; the other end of the second connecting rod is hinged to one end of the second safety clamp lifting rod; the other end of the second safety clamp lifting rod is connected with the second safety clamp; the middle part of the second connecting rod is hinged to the second column through a second support; when the initial installation position of the speed limiter lifting rod is horizontal, the rod lengths of the first swing rod and the second swing rod are not equal; the rod lengths of the first connecting rod and the second connecting rod are not equal.

2. The elevator safety gear lifting device according to claim 1, characterized in that: The short handle end of the speed limiter lifting rod is hinged with a first swing assembly; the short handle end of the speed limiter lifting rod is connected with a third swing assembly through a linkage assembly; the first swing assembly and the third swing assembly are respectively hinged to the first column and the third column; the first swing assembly and the third swing assembly are respectively connected with a first safety clamp and a third safety clamp; an action switch for cutting off the elevator safety circuit is installed on the linkage assembly.

3. The elevator safety gear lifting device according to claim 1, characterized in that: The linkage assembly includes a linkage shaft, a linkage rod, a torsion spring and a torsion spring seat; the linkage shaft passes through the torsion spring; one end of the linkage shaft is connected with the short handle end of the speed limiter lifting rod, and the other end is connected with the linkage rod; the linkage rod is respectively hinged to the third swing assembly and / or the fourth swing assembly; one end of the torsion spring is fixed on the linkage shaft, and the other end is fixed on the elevator car bottom through the torsion spring seat.

4. The elevator safety gear lifting device according to claim 3, characterized in that: The third swing assembly includes a third swing rod, a third connecting rod and a third safety clamp lifting rod; one end of the third swing rod is hinged to one end of the linkage rod, and the other end is hinged to one end of the third connecting rod; the other end of the third connecting rod is hinged to one end of the third safety clamp lifting rod; the other end of the third safety clamp lifting rod is connected with the third safety clamp; the middle part of the third connecting rod is hinged to the third column through a third support.

5. The elevator safety tong lifting device according to claim 3, characterized in that: The fourth swing assembly includes a fourth swing rod, a fourth connecting rod, and a fourth safety clamp lifting rod; one end of the fourth swing rod is hinged to one end of the linkage rod, and the other end is hinged to one end of the fourth connecting rod; the other end of the fourth connecting rod is hinged to one end of the fourth safety clamp lifting rod; the other end of the fourth safety clamp lifting rod is connected to the fourth safety clamp; the middle of the fourth connecting rod is hinged to the fourth column through a fourth support.

6. The elevator safety gear lifting device according to claim 3, characterized in that: The action switch includes a switch hitting plate, a safety switch, and a switch bracket; the switch hitting plate is installed on the linkage shaft; the switch hitting plate contacts the safety switch through the rotation of the linkage shaft; the safety switch is installed on the bottom of the elevator car through the switch bracket; the safety switch is electrically connected to the safety circuit of the elevator.

7. The elevator safety gear lifting device according to claim 1, characterized in that: When the included angles between the initial installation position and the finally lifted position of the speed limiter lifting rod and the horizontal plane are equal respectively, the rod lengths of the first swing rod and the second swing rod are equal, and the rod lengths of the first connecting rod and the second connecting rod are equal.

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