Linkage braking device of multi-stage buffer type elevator safety tongs

Abstract

The invention belongs to the technical field of elevator braking, and discloses a linkage braking device of multistage buffer type elevator safety tongs, which comprises a tongs seat, a speed governor, a brake rope wound on the speed governor, a linkage lever mounted on the outer side of the brake rope and a guide rail, an assembly cavity is formed in the front surface of the tongs seat, and a fixed wedge block and a brake wedge block are respectively arranged in the assembly cavity; a middle cable is fixedly connected to the top of the brake wedge block, one end of the linkage lever is fixed to the top of the caliper base, the linkage lever is fixedly connected with the middle cable, and a brake compensation assembly is arranged on the front face of the brake wedge block. By means of the brake wedge block, the brake compensation assembly, the thermal compensation unit and the buffer plate, multi-stage buffer type brake treatment is formed during brake treatment, the clamping brake effect of the safety tongs on a guide rail is greatly improved, graded brake is achieved when an elevator is overspeed or out of control, impact force is reduced, and passenger safety and equipment integrity are ensured; and the safety in the braking process is further improved.

Description

Technical Field

[0001] This invention belongs to the field of elevator braking technology, specifically a linkage braking device for a multi-stage buffer elevator safety clamp. Background Technology

[0002] The linkage braking device of the elevator safety clamp is an emergency braking system in case of elevator overspeed. It is triggered by the speed governor and forcibly clamps the guide rail through mechanical or electrical linkage to stop the car safely.

[0003] The existing elevator safety clamp linkage braking device, when in use, triggers the reducer to clamp the guide rail when the elevator encounters abnormal overspeed. However, in actual braking clamping, it is mostly a single-stage braking process with large braking inertia and high intensity, which poses braking risks and has a significant negative impact on people inside the elevator. Moreover, due to the limitation of the single braking structure, the actual braking safety in complex situations is generally poor, and there are risks. The overall effect of use is not good.

[0004] In addition, during high-speed heavy-load braking, intense mechanical friction generates a large amount of heat. Traditional braking devices lack a compensation mechanism for frictional heat fade, which can easily lead to a decrease in braking performance as the temperature rises, affecting safety. Summary of the Invention

[0005] The purpose of this invention is to provide a linkage braking device for a multi-stage buffer elevator safety clamp, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a linkage braking device for a multi-stage buffer elevator safety clamp, comprising a clamp seat, a speed limiter, a brake rope wound around the speed limiter, a linkage lever and a guide rail installed on the outside of the brake rope. The clamp seat has an assembly cavity on its front side, in which a fixed wedge and a brake wedge are respectively provided. An intermediate cable is fixedly connected to the top of the brake wedge. One end of the linkage lever is fixed to the top of the clamp seat, and the linkage lever is fixedly connected to the intermediate cable. A brake compensation component is provided on the front side of the brake wedge. The brake compensation component has a buffer plate. A heat compensation unit and a heat conduction block are respectively provided on the front side of the brake wedge. The interior of the brake wedge is filled with a low-boiling-point vaporized substance. The inner end of the heat conduction block is in contact with the low-boiling-point vaporized substance. The heat compensation unit is connected to the interior of the brake wedge. The brake wedge includes a wedge body, an internal cavity and an adapter groove.

[0007] The thermal compensation unit includes a fixed sleeve, a damping block, a fixed ring, a spring, a rubber sleeve, and a slit. The fixed sleeve is fixedly fitted onto the front of the wedge block body. The damping block is movably fitted into the interior of the brake compensation assembly. The fixed ring is fixedly fitted into the fixed sleeve. The spring is fixedly connected between the fixed ring and the damping block. The rubber sleeve is fixedly fitted into the fixed ring. The slit is opened on the rubber sleeve. The slit is used to provide throttling damping and smooth pressure fluctuations when low-boiling-point vaporized chemical substances vaporize and expand.

[0008] Preferably, the fixed wedges are symmetrically distributed inside the caliper seat, and the brake wedges are adapted to the fixed wedges and correspond one-to-one.

[0009] Preferably, the internal cavity is formed inside the wedge body, and the adapter groove is formed on the front side of the wedge body.

[0010] Preferably, the braking compensation assembly includes an outer side plate, a middle frame, a second heat-conducting block, a second spring, and a limiting block. The limiting block is fixed in the adapter groove. The outer side plate is fixed on the outer end of the middle frame. The inner end of the middle frame is movably sleeved in the adapter groove. One end of the second spring is fixedly connected to the middle frame, and the other end of the second spring is fixedly connected to the adapter groove. One end of the second heat-conducting block is fixedly nested in the outer side plate, and the other end of the second heat-conducting block passes through the outer side plate and is nested in the middle frame. The inner end of the second heat-conducting block is in contact with a low-boiling-point vaporized substance in the adapter groove.

[0011] Preferably, the buffer plate is an elastic plate, and the buffer plate is nested on the front side of the outer plate, with the outer side of the buffer plate protruding beyond the front side of the outer plate.

[0012] Preferably, the outer inclined surface of the wedge block body is provided with a stepped hole, a sealing plug is provided in the stepped hole, the interior of the fixed wedge block is provided with an operating port, and the outer side of the clamp seat is provided with an outer opening aligned with the operating port.

[0013] Preferably, both sides of the clamp seat are provided with adjustment components, which adjust the position of the fixing wedge in the clamp seat.

[0014] Preferably, the adjusting assembly includes a sleeve rod, an adjusting bolt, and a spring. The sleeve rod moves through the outer side of the clamp seat, and its inner end is fixedly connected to the fixed wedge. The spring is fixed on the outer side of the clamp seat, and its other end is fixedly connected to the sleeve rod. The adjusting bolt is threaded onto the outer side of the clamp seat, and its other end passes through the clamp seat and abuts against the outer side of the fixed wedge.

[0015] Preferably, the linkage lever includes a middle part, a connecting part, a first spring, and a supporting part. The connecting part is fixedly sleeved on the brake rope, and the supporting part is fixed on the top of the caliper seat. One end of the middle part is rotatably sleeved in the supporting part, and the other end of the middle part is movably sleeved in the connecting part. The first spring is fixed at the bottom of the middle part, and the other end of the first spring is fixed at the top of the caliper seat. When the speed limiter rotates at high speed and locks, it pulls the linkage lever through the brake rope, and pulls the brake wedge upward through the middle cable at the bottom of the linkage lever, so that the brake wedge moves upward relative to the outside of the guide rail.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. This invention utilizes brake wedges, brake compensation components, thermal compensation units, and buffer plates to form a multi-stage buffer braking process during braking, which greatly improves the clamping and braking effect of the safety clamp on the guide rail. It achieves graded braking when the elevator overspeeds or runs out of control, reduces impact force, ensures passenger safety and equipment integrity, and further improves safety during the braking process.

[0018] 2. This invention constructs an adaptive compensation mechanism by combining the slit structure in the thermal compensation unit with a low-boiling-point vaporized substance. When the braking friction generates a large amount of heat, which may cause thermal fade or increased wear gap in the friction pair, the gas pressure generated by the heat absorption and vaporization of the working substance is smoothly pushed outward by the throttling and damping effect of the slit. Instead of increasing the braking force indefinitely, it fills the contact pressure loss caused by wear or thermal softening in real time, thereby achieving a stable braking effect against thermal fade and ensuring a smooth and reliable braking process.

[0019] 3. This invention utilizes the adjustment component on the outside of the clamp seat to change the position of the fixed wedge under rotational control, thereby pushing the brake wedge to move accordingly, changing the distance between the brake wedge and the guide rail, and changing the reserved distance for the brake wedge to move upward and clamp, thus changing the braking sensitivity of the brake wedge to the guide rail when it is in action. It can be adaptively adjusted according to actual braking requirements, resulting in good performance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the clamp base of the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the clamp seat and brake wedge of the present invention;

[0023] Figure 4 This is a schematic diagram of the linkage lever of the present invention;

[0024] Figure 5This is a schematic diagram of the fixing wedge block of the present invention;

[0025] Figure 6 This is a schematic diagram of the brake wedge block of the present invention;

[0026] Figure 7 This is a cross-sectional schematic diagram of the brake wedge block of the present invention;

[0027] Figure 8 This is an exploded view of the braking compensation component of the present invention;

[0028] Figure 9 This is an exploded view of the braking component of the present invention;

[0029] Figure 10 This is a schematic diagram of the buffer plate of the present invention.

[0030] In the diagram: 1. Caliper seat; 2. Speed ​​limiter; 3. Brake rope; 4. Guide rail; 5. Linkage lever; 51. Middle part; 52. Connecting part; 53. Spring 1; 54. Support part; 6. Fixed wedge; 7. Brake wedge; 71. Wedge body; 72. Internal cavity; 73. Adaptor groove; 8. Intermediate cable; 9. Brake compensation assembly; 91. Outer plate; 92. Middle frame; 93. Heat-conducting block 2; 94. Spring 2; 95. Limiting block; 10. Adjustment assembly; 101. Sleeve rod; 102. Adjusting bolt; 103. Spring 3; 11. Thermal compensation unit; 111. Fixed sleeve; 112. Damping block; 113. Fixed ring; 114. Spring 4; 115. Rubber sleeve; 116. Slit; 12. Heat-conducting block 1; 13. Buffer plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1 to 10As shown, this embodiment of the invention provides a linkage braking device for a multi-stage buffer elevator safety clamp, including a clamp seat 1, a speed limiter 2, a brake rope 3 wound around the speed limiter 2, a linkage lever 5 installed on the outside of the brake rope 3, and a guide rail 4. The front of the clamp seat 1 is provided with an assembly cavity, in which a fixing wedge 6 and a brake wedge 7 are respectively provided. An intermediate cable 8 is fixedly connected to the top of the brake wedge 7. One end of the linkage lever 5 is fixed to the top of the clamp seat 1, and the linkage lever 5 is fixedly connected to the intermediate cable 8. The front of the brake wedge 7 is provided with a brake compensation component 9 and a buffer plate 13. The front of the brake wedge 7 is provided with a heat compensation unit 11 and a heat conduction block 12. The interior of the brake wedge 7 is filled with a low-boiling-point vaporized substance. The inner end of the heat conduction block 12 is in contact with the low-boiling-point vaporized substance. The heat compensation unit 11 is connected to the interior of the brake wedge 7.

[0033] Example 1: In use, when the elevator descends, it drives the clamp seat 1 to move accordingly, and the brake wedge 7 in the clamp seat 1 is located outside the guide rail 4. At the same time, the linkage lever 5 drives the brake rope 3 to rotate the speed governor 2. When the elevator descends too fast, the locking part in the speed governor 2 swings under centrifugal force and is nested in the internal groove of the speed governor 2, completing the locking of the speed governor and stopping the movement of the outer brake rope 3. This causes the brake rope 3 to have a relative displacement with respect to the linkage lever 5, pulling the linkage lever 5 to swing. At the same time, it pulls the brake wedge 7 upward along the inclined surface of the front of the fixed wedge 6. The movement causes the brake wedges 7 on both sides to move upwards and move closer together, gradually pressing against both sides of the guide rail 4. The buffer plate 13 on the brake compensation assembly 9 on the front of the brake wedge 7 first contacts the guide rail, decelerating the elevator. After completing the buffer deceleration, as the buffer plate 13 is compressed, the outer plate 91 in the brake compensation assembly 9 contacts the outer side of the guide rail 4, performing deceleration under secondary pressure. As friction occurs, the temperature of the outer friction surface of the outer plate 91 rises sharply, causing the heat-conducting block 12 to absorb heat. The internal temperature of the heat-conducting block 12 rises rapidly and the heat is transferred through the inner end. The heat is transferred to the interior of the brake wedge 7. The low-boiling-point vaporized substance in the internal cavity 72 of the brake wedge 7 rapidly absorbs heat and gradually vaporizes. After vaporization, the pressure in the internal cavity 72 increases. Some of the vaporized gas fills the fixed sleeve 111 of the thermal compensation unit 11 through the slit 116, causing the pressure in the fixed sleeve 111 to increase. The increased internal pressure of the fixed sleeve 111 acts on the damping block 112, causing the damping block 112 to move towards the outside of the guide rail to fill the thermal fade gap. The damping blocks 112 on both sides are compressed along the outside of the guide rail to complete the braking under three-stage buffer. As the brake wedge 7 is further pressed between the fixed wedge 6 and the guide rail 4, the compression and clamping are completed, and the braking is completed. When the brake compensation component 9 generates a lot of heat and wear under relative sliding, the outer plate 91 is abnormally reduced in thickness under friction. At this time, the huge frictional heat is transferred to the adapter groove 73 through the heat conduction block 2 93, which causes the low boiling point vaporized substance in the adapter groove 73 to vaporize rapidly and generate pressure, which acts on the middle frame 92, pushing the middle frame 92 to drive the outer plate 91 to further contact the outer side of the guide rail 4, completing the compensation after brake wear and completing the braking process.

[0034] First, by utilizing the brake wedge 7, brake compensation component 9, thermal compensation unit 11, and buffer plate 13, a multi-stage buffer braking process is formed during braking, which greatly improves the clamping and braking effect of the safety clamp on the guide rail. When the elevator overspeeds or goes out of control, it achieves graded braking, reduces impact force, ensures passenger safety and equipment integrity, and further improves safety during the braking process.

[0035] Furthermore, by utilizing the combined action of the thermal compensation unit 11 and the low-boiling-point vaporized substance in the brake wedge 7, and by utilizing the combined action of the low-boiling-point vaporized substance in the adapter groove 73 and the brake compensation component 9, during braking friction, the heat generated by friction is used to achieve a large amount of vaporization of the low-boiling-point vaporized substance. The thrust generated by the air pressure is used to maintain braking performance. On the one hand, it pushes the damping block 112 to compensate for wear on the guide rail 4, and on the other hand, it uses pressure to act on the middle frame 92 to achieve the fitting compensation of the outer plate 91, effectively counteracting the thermal fade caused by high temperature and ensuring a stable braking effect during braking.

[0036] Example 2: When it is necessary to adjust the braking sensitivity, by rotating the adjustment component 10 on the outside of the caliper seat 1, rotating the adjustment bolt 102 and pushing the fixed wedge 6 to move laterally along the inside of the caliper seat 1, the fixed wedge 6 pushes the brake wedge 7, which is in front of it, to move synchronously and move towards the guide rail, thereby reducing the distance between the brake wedge 7 and the guide rail 4, and at the same time reducing the movable distance of the brake wedge 7 sliding up along the front of the fixed wedge 6, thus enhancing the action sensitivity during the braking phase.

[0037] First, by using the adjustment component 10 on the outside of the clamp seat 1, the position of the fixed wedge 6 is changed under rotation control, the brake wedge 7 is pushed to move accordingly, and the distance between the brake wedge 7 and the guide rail is changed, as well as the reserved distance for the brake wedge 7 to move upward and clamp, thereby changing the braking sensitivity of the brake wedge 7 to the guide rail when it is in action. According to the actual braking requirements, adaptive adjustment is made, and the effect is good.

[0038] Among them, the fixed wedges 6 are symmetrically distributed inside the caliper seat 1, and the brake wedges 7 are adapted to the fixed wedges 6 and correspond one-to-one.

[0039] By cooperating with the fixed wedge 6 and the brake wedge 7, the brake wedge 7 is ensured to have lateral displacement when it moves upward along the front of the fixed wedge 6, and thus achieves stable braking of the guide rail 4.

[0040] The brake wedge 7 includes a wedge body 71, an internal cavity 72, and an adapter groove 73. The internal cavity 72 is located inside the wedge body 71, and the adapter groove 73 is located on the front side of the wedge body 71.

[0041] Both the internal cavity 72 and the adapter groove 73 are filled with a low-boiling-point vaporized substance, specifically a mixed solution of acetone and methanol. When absorbing frictional heat, vaporization is achieved, increasing the internal pressure and establishing a compensating pressure to resist thermal fading, thus realizing adaptive thermal compensation braking.

[0042] The thermal compensation unit 11 includes a fixed sleeve 111, a damping block 112, a fixed ring 113, a spring 114, a rubber sleeve 115, and a slit 116. The fixed sleeve 111 is fixedly fitted onto the front of the wedge block body 71. The damping block 112 is movably fitted into the inside of the brake compensation assembly 9. The fixed ring 113 is fixedly fitted into the fixed sleeve 111. The spring 114 is fixedly connected between the fixed ring 113 and the damping block 112. The rubber sleeve 115 is fixedly fitted into the fixed ring 113. The slit is opened on the rubber sleeve 115. The slit 116 is used to provide throttling damping and smooth pressure fluctuations when low-boiling-point vaporized chemical substances vaporize and expand.

[0043] By utilizing the elastic opening of the slit 116 under internal air pressure, the vaporized gas input inside pushes the damping block 112 to exert force on the guide rail 4 outward, thereby realizing thermal compensation auxiliary braking in multi-stage buffer braking.

[0044] The braking compensation component 9 includes an outer plate 91, a middle frame 92, a second heat-conducting block 93, a second spring 94, and a limiting block 95. The limiting block 95 is fixed in the adapter groove 73. The outer plate 91 is fixed on the outer end of the middle frame 92. The inner end of the middle frame 92 is movably sleeved in the adapter groove 73. One end of the second spring 94 is fixedly connected to the middle frame 92, and the other end of the second spring 94 is fixedly connected to the adapter groove 73. One end of the second heat-conducting block 93 is fixedly nested in the outer plate 91, and the other end of the second heat-conducting block 93 passes through the outer plate 91 and is nested in the middle frame 92. The inner end of the second heat-conducting block 93 is in contact with the low-boiling-point vaporized substance in the adapter groove 73.

[0045] When the outer side plate 91 is abnormally worn and has a large amount of heat, the braking compensation component 9 uses the heat-conducting block 93 to transfer heat and, together with the vaporization pressure acting on the middle frame 92, realizes the movement compensation of the outer side plate 91 and achieves compensating braking.

[0046] The buffer plate 13 is an elastic plate, and the buffer plate 13 is nested on the front of the outer plate 91, with the outer side of the buffer plate 13 protruding from the front of the outer plate 91.

[0047] By utilizing the elastic buffer plate 13 as a primary braking unit, buffer braking under compression is achieved.

[0048] The wedge body 71 has a stepped hole on its outer inclined surface, a sealing plug in the stepped hole, an operating port inside the fixed wedge 6, and an outer opening aligned with the operating port on the outer side of the clamp seat 1.

[0049] By utilizing the operating port and the outer port, liquid is filled into the inner cavity 72 when the sealing plug is opened.

[0050] The clamp seat 1 has adjustment components 10 on both sides. The adjustment components 10 adjust the position of the fixed wedge 6 in the clamp seat 1. The adjustment components 10 include a sleeve rod 101, an adjustment bolt 102 and a spring 103. The sleeve rod 101 moves through the outer side of the clamp seat 1 and the inner end of the sleeve rod 101 is fixedly connected to the fixed wedge 6. The spring 103 is fixed on the outer side of the clamp seat 1 and the other end of the spring 103 is fixedly connected to the sleeve rod 101. The adjustment bolt 102 is threaded onto the outer side of the clamp seat 1 and the other end of the adjustment bolt 102 passes through the clamp seat 1 and abuts against the outer side of the fixed wedge 6.

[0051] By using the adjustment component 10 to adjust the position of the fixed wedge 6, the sensitivity of the braking action can be changed to adapt to actual braking needs.

[0052] The linkage lever 5 includes a middle part 51, a connecting part 52, a spring 53, and a support part 54. The connecting part 52 is fixedly sleeved on the brake rope 3, and the support part 54 is fixed on the top of the caliper seat 1. One end of the middle part 51 is rotatably sleeved in the support part 54, and the other end of the middle part 51 is movably sleeved in the connecting part 52. The spring 53 is fixed at the bottom of the middle part 51, and the other end of the spring 53 is fixed at the top of the caliper seat 1. When the speed limiter 2 rotates at high speed and jams, the linkage lever 5 is pulled by the brake rope 3, and the brake wedge 7 is pulled upward by the middle cable 8 at the bottom of the linkage lever 5, so that the brake wedge 7 moves upward relative to the outside of the guide rail 4.

[0053] Speed ​​limiter 2 is an existing mechanism that operates under high-speed centrifugal force to achieve braking and starting control.

[0054] Working principle and usage process of this invention:

[0055] When in use, when the elevator descends too fast and triggers the speed limiter 2, the brake rope 3 pulls the linkage lever 5, which in turn lifts the brake wedge 7 up the inclined surface of the fixed wedge 6, so that the brake wedge 7 initially moves inward, and the buffer plate 13 on its surface contacts the guide rail 4 first to perform a first-level flexible friction braking.

[0056] In this process, this device solves the problem of braking performance thermal decline caused by high-speed friction heat generation in the prior art through the following thermodynamic and mechanical combination mechanism:

[0057] As braking continues, the buffer plate 13 and the outer side plate 91 generate a large amount of heat due to intense friction with the guide rail 4. According to the law of conservation of energy, the elevator's enormous kinetic energy is converted into frictional heat energy. This heat input power is far greater than the latent heat power required for the vaporization of the internal working fluid. Therefore, the temperature of the brake wedge 7 and the heat-conducting block 12 continues to accumulate and rise, and the overall temperature will not drop suddenly due to the heat absorption of the working fluid vaporization.

[0058] The heat-conducting block 12 rapidly transfers the accumulated heat to the interior of the brake wedge 7, causing the low-boiling-point vaporized substance (such as acetone) inside to undergo a phase change and vaporize upon heating, resulting in volume expansion and the establishment of internal pressure. The high-pressure gas generated by vaporization enters the fixed sleeve 111 through the slit 116 in the thermal compensation unit 11. At this time, the slit 116 plays a crucial role in throttling and damping, limiting the instantaneous flow of gas and preventing violent oscillations in internal pressure due to small temperature fluctuations, thus ensuring the stability of the output pressure.

[0059] After being throttled by slit 116, the air pressure smoothly pushes the damping block 112 outward. At this time, the role of the damping block 112 is not to increase the braking force indefinitely, but to perform "thermal compensation": when the friction surface softens or wears due to high temperature, resulting in a thinning thickness (i.e., thermal decay or increased gap), the damping block 112 automatically extends outward under the push of air pressure to fill the wear gap, compensate for the positive pressure, thereby counteracting thermal decay and maintaining a constant and reliable braking friction force until the elevator comes to a complete stop.

[0060] In summary, this invention utilizes frictional heat to trigger the vaporization of the working fluid and achieves automatic compensation for the decrease in braking force caused by wear and thermal fade during braking through the damping and stabilizing effect of the slit 116, thus ensuring the smoothness and safety of the braking process.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A linkage braking device for a multi-stage buffer elevator safety clamp, comprising a clamp seat (1), a speed governor (2), a brake rope (3) wound around the speed governor (2), a linkage lever (5) installed on the outside of the brake rope (3), and a guide rail (4), characterized in that: The front of the caliper seat (1) is provided with an assembly cavity, in which a fixed wedge (6) and a brake wedge (7) are respectively provided. The top of the brake wedge (7) is fixedly connected to an intermediate cable (8). One end of the linkage lever (5) is fixed to the top of the caliper seat (1), and the linkage lever (5) is fixedly connected to the intermediate cable (8). The front of the brake wedge (7) is provided with a brake compensation component (9) and a buffer plate (13) of the brake compensation component (9). The front of the brake wedge (7) is provided with a heat compensation unit (11) and a heat conduction block (12). The interior of the brake wedge (7) is filled with a low-boiling-point vaporized substance. The inner end of the heat conduction block (12) is in contact with the low-boiling-point vaporized substance. The heat compensation unit (11) is connected to the interior of the brake wedge (7). The brake wedge (7) includes a wedge body (71), an internal cavity (72), and an adapter groove (73). The thermal compensation unit (11) includes a fixed sleeve (111), a damping block (112), a fixed ring (113), a spring (114), a rubber sleeve (115), and a slit (116). The fixed sleeve (111) is fixedly fitted onto the front of the wedge block body (71). The damping block (112) is movably fitted into the inside of the brake compensation assembly (9). The fixed ring (113) is fixedly fitted into the fixed sleeve (111). The spring (114) is fixedly connected between the fixed ring (113) and the damping block (112). The rubber sleeve (115) is fixedly fitted into the fixed ring (113). The slit is opened on the rubber sleeve (115). The slit (116) is used to provide throttling damping and smooth pressure fluctuations when low-boiling-point vaporized chemical substances vaporize and expand.

2. The linkage braking device of a multi-stage buffer elevator safety clamp according to claim 1, characterized in that: The fixed wedges (6) are symmetrically distributed inside the caliper seat (1), and the brake wedges (7) are adapted to the fixed wedges (6) and correspond one-to-one.

3. The linkage braking device for a multi-stage buffer elevator safety clamp according to claim 2, characterized in that: The internal cavity (72) is located inside the wedge body (71), and the adapter groove (73) is located on the front side of the wedge body (71).

4. The linkage braking device of a multi-stage buffer elevator safety clamp according to claim 3, characterized in that: The braking compensation component (9) includes an outer plate (91), a middle frame (92), a second heat-conducting block (93), a second spring (94), and a limiting block (95). The limiting block (95) is fixed in the adapter groove (73). The outer plate (91) is fixed on the outer end of the middle frame (92). The inner end of the middle frame (92) is movably sleeved in the adapter groove (73). One end of the second spring (94) is fixedly connected to the middle frame (92), and the other end of the second spring (94) is fixedly connected to the adapter groove (73). One end of the second heat-conducting block (93) is fixedly nested in the outer plate (91), and the other end of the second heat-conducting block (93) passes through the outer plate (91) and is nested in the middle frame (92). The inner end of the second heat-conducting block (93) is in contact with the low-boiling-point vaporized substance in the adapter groove (73).

5. The linkage braking device of a multi-stage buffer elevator safety clamp according to claim 4, characterized in that: The buffer plate (13) is an elastic plate, and the buffer plate (13) is nested on the front of the outer plate (91), with the outer side of the buffer plate (13) protruding from the front of the outer plate (91).

6. The linkage braking device of a multi-stage buffer elevator safety clamp according to claim 5, characterized in that: The outer inclined surface of the wedge body (71) is provided with a stepped hole, and a sealing plug is provided in the stepped hole. The interior of the fixed wedge (6) is provided with an operating port, and the outer side of the clamp seat (1) is provided with an outer opening aligned with the operating port.

7. The linkage braking device for a multi-stage buffer elevator safety clamp according to claim 1, characterized in that: Both sides of the clamp seat (1) are provided with adjustment components (10), which adjust the position of the fixed wedge (6) in the clamp seat (1).

8. The linkage braking device for a multi-stage buffer elevator safety clamp according to claim 7, characterized in that: The adjustment assembly (10) includes a sleeve rod (101), an adjustment bolt (102), and a spring (103). The sleeve rod (101) moves through the outer side of the clamp seat (1), and the inner end of the sleeve rod (101) is fixedly connected to the fixed wedge (6). The spring (103) is fixed on the outer side of the clamp seat (1), and the other end of the spring (103) is fixedly connected to the sleeve rod (101). The adjustment bolt (102) is threaded onto the outer side of the clamp seat (1), and the other end of the adjustment bolt (102) passes through the clamp seat (1) and abuts against the outer side of the fixed wedge (6).

9. The linkage braking device of a multi-stage buffer elevator safety clamp according to claim 1, characterized in that: The linkage lever (5) includes a middle part (51), a connecting part (52), a spring (53), and a support part (54). The connecting part (52) is fixedly sleeved on the brake rope (3). The support part (54) is fixed on the top of the caliper seat (1). One end of the middle part (51) is rotatably sleeved in the support part (54), and the other end of the middle part (51) is movably sleeved in the connecting part (52). The spring (53) is fixed at the bottom of the middle part (51), and the other end of the spring (53) is fixed at the top of the caliper seat (1). When the speed limiter (2) rotates at high speed and jams, it pulls the linkage lever (5) through the brake rope (3) and pulls the brake wedge (7) upward through the middle cable (8) at the bottom of the linkage lever (5), so that the brake wedge (7) moves upward relative to the outside of the guide rail (4).

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