Counterweight frame for an elevator

Abstract

The application relates to the technical field of elevator equipment, in particular to a counterweight frame for an elevator, which comprises a frame body, guide rails and counterweight blocks, the counterweight blocks are located in the frame body, guide shoes are arranged on the two sides of the frame body, the guide shoes are slidably connected to the guide rails in the vertical direction, the guide shoes are provided with first brake assemblies, the first brake assemblies comprise brake pads and first elastic members for forcing the brake pads to abut against the guide rails, the brake pads are slidably connected to the frame body, the first elastic members are arranged on the frame body, the first elastic members can force the brake pads to slide, the frame body is provided with limiting assemblies for limiting the brake pads, when the limiting assemblies limit the brake pads, gaps exist between the brake pads and the guide rails, the guide shoes are provided with heat-conducting members, when the heat-conducting members have high heat, the heat-conducting members drive the limiting assemblies to cancel the limitation on the brake pads. The application has the effect of improving the installation of the elevator.

Description

Technical Field

[0001] This application relates to the field of elevator equipment technology, and in particular to a counterweight frame for elevators. Background Technology

[0002] With the improvement of people's living standards and the development of high-rise buildings, elevators are being used more and more widely. As a typical special equipment, their operation is related to traffic safety in public places. The effective coordination of various elevator systems ensures the safe and efficient operation of elevators. The elevator counterweight is an important component of the elevator traction system, mainly used to balance the weight of the car and part of the load weight, reducing motor losses. The two ends of the traction steel wire rope are connected to the car and the counterweight respectively. The car is driven to rise and fall by the friction between the steel wire rope and the traction sheave groove. When stopping, braking is performed by a brake. However, sometimes the braking force is insufficient, and in severe cases, accidents such as falling into the shaft or overshooting may occur, affecting the lives of passengers. Summary of the Invention

[0003] To improve the installability of elevators, this application provides a counterweight frame for elevators.

[0004] The technical solution for an elevator counterweight frame provided in this application is as follows:

[0005] An elevator counterweight frame includes a frame body, guide rails, and counterweight blocks. The counterweight blocks are located within the frame body. Guide shoes are provided on both sides of the frame body. The guide shoes are slidably connected to the guide rails in a vertical direction. Each guide shoe is equipped with a first braking assembly. The first braking assembly includes a brake pad and a first elastic member that forces the brake pad to abut against the guide rail. The brake pad is slidably connected to the frame body. The first elastic member is located on the frame body and can force the brake pad to slide. The frame body is equipped with a limiting assembly that limits the brake pad. When the limiting assembly limits the brake pad, there is a gap between the brake pad and the guide rail. The guide shoes are equipped with a heat-conducting member. When the heat of the heat-conducting member is high, the heat-conducting member drives the limiting assembly to release the limitation on the brake pad.

[0006] By adopting the above technical solution, since the car is connected to the counterweight frame, when the car falls rapidly, the car will drive the counterweight frame to rise rapidly. During the rising process, the heat-conducting component and the guide rail will rub rapidly, thereby generating a large amount of heat. After generating a large amount of heat, the heat-conducting component can drive the limiting component to release the limit on the brake pads. The brake pads slide under the action of the first elastic component. When the brake pads abut against the guide rail under the action of the first elastic component, the brake pads can slow down the rising speed of the counterweight frame, thereby slowing down the falling speed of the car.

[0007] Optionally, the limiting component includes a limiting hook, which is slidably connected to the frame. One end of the limiting hook is hooked to the brake pad, and the other end of the limiting hook is provided with a phase change layer that can force the limiting hook to slide. The phase change layer is provided with a heat-conducting strip, one end of which is connected to the phase change layer, and the other end of which abuts against the guide rail.

[0008] By adopting the above technical solution, during the rapid ascent of the counterweight frame, the heat-conducting strip comes into contact with the guide rail, and thus heat is rapidly generated by the friction between the heat-conducting strip and the guide rail. This heat cannot be dissipated in time, so the heat-conducting strip will transfer the heat to the phase change layer, causing the phase change layer to undergo a phase change. After the phase change layer undergoes a phase change, its volume will increase, thereby forcing the limit hook to slide. When the limit hook slides to a certain distance, the limit hook will be released, allowing the brake pads to abut against the guide rail under the action of the first elastic element, thereby slowing down the ascent speed of the counterweight frame and thus slowing down the descent speed of the car.

[0009] Optionally, a sliding sleeve is provided above the guide shoe, and the sliding sleeve has a second sliding groove. One end of the limiting hook is slidably connected to the second sliding groove, and the phase change layer is located in the second sliding groove. After the phase change layer undergoes a phase change, it can force the limiting hook to slide.

[0010] By adopting the above technical solution, a sliding sleeve is provided on the frame, and a second sliding groove is provided on the sliding sleeve. One end of the limiting hook is slidably connected to the second sliding groove, thereby restricting the relative position of the phase change layer and the limiting hook, so that when the phase change layer undergoes a phase change, the phase change layer can force the limiting hook to slide.

[0011] Optionally, a protective film is provided on the outside of the phase change layer. The protective film is elastically deformable, and the phase change layer abuts against the limiting hook located in the second sliding groove through the protective film.

[0012] By adopting the above technical solution, a protective film is set on the outside of the phase change layer. The protective film protects the phase change layer, thereby reducing the possibility of leakage of the phase change material after the phase change layer undergoes phase change. In addition, the protective film has a certain elastic deformation. When the phase change layer undergoes phase change and the volume increases, the protective film can adapt to the deformation, thereby forcing the limiting hook to slide.

[0013] Optionally, the frame is provided with a thermoelectric cooler, one end of which is connected to a heat-conducting strip. When the thermoelectric cooler is energized, it can cool the heat-conducting strip.

[0014] By adopting the above technical solution, under normal operation, the semiconductor cooling chip can cool the heat-conducting strip after being energized, thereby reducing the heat generation of the heat-conducting component. Under normal operation, the heat generated by the friction between the heat-conducting component and the guide rail will not cause the phase change layer to undergo a large phase change, thus preventing the limit hook from disengaging from the brake pad. When the frame rises rapidly, the heat-conducting component generates heat quickly. The semiconductor cooling chip cannot cool the heat-conducting surface in time, and the heat-conducting component transfers the heat to the phase change layer, causing the phase change layer to undergo a large phase change. After the phase change layer undergoes a phase change, the sliding part slides to release the limit on the brake pad.

[0015] Optionally, the contact surface between the guide rail and the brake pad is provided with a number of steel balls, which slide and connect to the guide rail in the direction close to the brake. The brake pad is a magnetic pad, and the brake pad has a number of arc-shaped grooves distributed vertically on the brake pad.

[0016] By adopting the above technical solution, when the frame is rising rapidly, the brake pads approach and abut against the guide rail. The magnetic force of the brake pads can force the steel balls to slide towards the brake pads. The steel balls protrude from the surface of the guide rail. At this time, the steel balls can be stuck in the arc groove, thereby slowing down the upward trend of the frame.

[0017] Optionally, the frame is provided with a second braking assembly, the second braking assembly including an ejection box and an airbag disposed in the ejection box, the frame is provided with a second elastic member to eject the ejection box, and the frame is provided with a limiting member to limit the ejection box.

[0018] By adopting the above technical solution, when the braking capacity of the brake pads is insufficient to significantly reduce the rising speed of the counterweight frame, the ejection box can be ejected, and the airbag inside the ejection box can slow down the rising speed of the counterweight frame.

[0019] Optionally, the frame has a hidden cavity, the pop-out box is slidably connected to the hidden cavity, the upper surface of the frame has a third sliding groove communicating with the hidden cavity in the vertical direction, the limiting member is a limiting rod, the limiting rod is slidably connected to the third sliding groove, the pop-out box is provided with a limiting block, the limiting block has a second limiting hole for the limiting rod to be locked, the frame is provided with a third elastic member that forces the limiting rod to slide upward to disengage from the second limiting hole, the limiting hook blocks the upper opening of the third sliding groove, and the limiting hook has an avoidance groove on the side of the third sliding groove near the sliding sleeve that can avoid the limiting rod.

[0020] By adopting the above technical solution, when the friction of the brake pads has a small effect on hindering the movement of the frame, the heat of the heat-conducting sheet continues to rise, which will cause the phase change layer to undergo a continuous phase change, thereby causing the limit hook to continue to slide. When the limit hook slides to the position corresponding to the clearance groove and the limit rod, the limit rod slides upward under the action of the third elastic element, and the upper part of the limit rod slides into the clearance groove, thereby causing the lower end of the limit rod to disengage from the second limit hole, so as to release the limit rod from the limit of the ejector box. At this time, the ejector box can eject the hidden cavity under the action of the second spring.

[0021] Optionally, a micro switch is provided on the contact surface between the frame and the ejection box, the frame is provided with an inflation assembly, the inflation assembly is connected to the airbag, and the micro switch is connected to the inflation assembly.

[0022] By adopting the above technical solution, when the ejection box is ejected, the micro switch is triggered, and the micro switch transmits a signal to the inflation component. The inflation component inflates the airbag, thereby making the airbag larger. After the airbag is enlarged, it abuts against the wall inside the elevator shaft, thereby slowing down the speed at which the frame rises.

[0023] Optionally, the frame is provided with a sliding groove, the counterweight is slidably connected in the sliding groove, the frame is provided with a disassembly port communicating with the sliding groove, and a baffle is provided at the disassembly port of the frame.

[0024] By adopting the above technical solution, a disassembly port is provided, which allows the number of counterweights to be increased or decreased according to the required counterweight.

[0025] In summary, the present invention has the following beneficial effects:

[0026] 1. During the rapid ascent of the counterweight frame, the heat-conducting strip comes into contact with the guide rail. As a result, the heat-conducting strip generates heat rapidly due to friction with the guide rail. Since this heat cannot be dissipated in time, the heat-conducting strip will transfer the heat to the phase change layer, causing the phase change layer to undergo a phase change. After the phase change layer undergoes a phase change, its volume will increase, thereby forcing the limit hook to slide. When the limit hook slides to a certain distance, it will release the limit hook's restriction, allowing the brake pads to abut against the guide rail under the action of the first elastic element, thereby slowing down the ascent speed of the counterweight frame and thus slowing down the descent speed of the car.

[0027] 2. When the friction of the brake pads has a small effect on hindering the movement of the frame, the heat of the heat-conducting sheet continues to rise, causing the phase change layer to undergo a continuous phase change. This causes the limit hook to continue to slide. When the limit hook slides to the position corresponding to the clearance groove and the limit rod, the limit rod slides upward under the action of the third elastic element. The upper part of the limit rod slides into the clearance groove, causing the lower end of the limit rod to disengage from the second limit hole, thereby releasing the limit rod from limiting the ejection box. At this time, the ejection box can eject from the hidden cavity under the action of the second spring. When the ejection box ejects, the micro switch is triggered, and the micro switch transmits a signal to the inflation assembly. The inflation assembly inflates the airbag, making the airbag larger. After the airbag enlarges, it abuts against the wall inside the elevator shaft, thereby slowing down the upward speed of the frame. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of this embodiment;

[0029] Figure 2 This is a schematic diagram of the structure of the first braking component in this embodiment;

[0030] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0031] Figure 4 This is a schematic diagram of the steel ball structure in this embodiment;

[0032] Figure 5 This is a schematic diagram of the pop-up box in this embodiment.

[0033] In the diagram, 1. Guide rail; 11. First sliding groove; 12. Fourth sliding groove; 13. Steel ball; 14. Limiting ring; 2. Frame; 21. Disassembly port; 211. Baffle; 22. Mounting groove; 23. Guide shoe; 24. First braking assembly; 241. Brake pad; 2411. Arc groove; 242. First spring; 243. First mounting block; 244. Mounting rod; 2441. First limiting hole; 245. First retaining ring; 251. Hook part; 252. Sliding part; 253. 1. Connecting part; 254. Clearance groove; 26. Second mounting block; 261. Fourth spring; 27. Hidden cavity; 271. Limiting rod; 272. Third spring; 273. Second retaining ring; 274. Third sliding groove; 3. Counterweight; 4. Sliding sleeve; 41. Second sliding groove; 42. Phase change layer; 43. Heat-conducting strip; 44. Heat-conducting surface; 45. Semiconductor cooling chip; 5. Pop-out box; 51. Limiting block; 52. Second limiting hole; 53. Second spring; 54. Micro switch. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses a counterweight frame for an elevator, referring to... Figure 1 It includes a frame 2 and a counterweight 3. The frame 2 has an internal mounting groove 22, and the counterweight 3 is fitted into the mounting groove 22.

[0036] Reference Figure 1 and Figure 2 The frame 2 has a disassembly opening 21, which is connected to the mounting groove 22. The frame 2 is equipped with a baffle 211 that can close the disassembly buckle. The baffle 211 is fixedly connected to the frame 2 by bolts. The number of counterweights 3 can be increased or decreased according to the required counterweight.

[0037] Reference Figure 2 and Figure 3 Guide rails 1 are provided on both sides of the frame 2 along the width direction. The length direction of the guide rails 1 is vertical. A first sliding groove 11 is provided on the side of the guide rail 1 near the frame. The length direction of the first sliding groove 11 is vertical. Guide shoes 23 are fixedly connected to both sides of the frame along the width direction. The guide shoes 23 on both sides slide vertically and are connected to the first sliding grooves 11 on both sides.

[0038] Reference Figure 2 and Figure 3 The guide shoe 23 is provided with a first braking assembly 24, which includes a brake pad 241 and a first elastic element that forces the brake pad 241 against the wall of the first sliding groove 11. The first elastic element is a first spring 242. A mounting rod 244 is fixedly connected to one side of the brake pad 241. A first mounting block 243 is fixedly connected to the upper surface of the guide shoe 23. The mounting rod 244 slides through the first mounting block 243. The first spring 242 is located between the brake pad 241 and the first mounting block 243. The first spring 242 is coaxially sleeved on the mounting rod 244. A first retaining ring 245 is arranged around the outer peripheral wall of the mounting rod 244. One end of the first spring 242 is fixedly connected to the first retaining ring 245, and the other end of the first spring 242 is fixedly connected to the first mounting block 243.

[0039] Reference Figure 2 and Figure 3 Under normal conditions, the first spring 242 is compressed, resulting in a gap between the brake pad 241 and the groove wall of the first sliding groove 11. The guide shoe 23 is provided with a limiting component to limit the mounting rod 244. When the first spring 242 is compressed, the limiting component limits the mounting rod 244, so that the brake pad 241 and the groove wall of the first sliding groove 11 always have a gap.

[0040] Refer to 2 and Figure 4The guide rail 1 is provided with several sets of steel balls 13, which are distributed along the length of the guide rail 1. Each set of steel balls 13 includes several steel balls 13, which are distributed along the width of the guide rail 1. The inner wall of the first sliding groove 11 is provided with a fourth sliding groove 12 corresponding to the several steel balls 13. The steel balls 13 are slidably connected in the fourth sliding groove 12. A limiting ring 14 is fixedly connected at the opening of the fourth sliding groove 12 to limit the movement of the steel balls 13. The brake pad 241 is a magnetic pad. The side of the brake pad 241 near the steel balls 13 is provided with several arc-shaped grooves 2411. The length of the arc-shaped grooves 2411 is parallel to the width of the frame 2, and the several arc-shaped grooves 2411 are distributed in the vertical direction. As the frame 2 rises rapidly, the brake pad 241 approaches and abuts against the guide rail 1. The magnetic force of the brake pad 241 forces the steel ball 13 to slide towards the brake pad 241. The steel ball 13 protrudes from the surface of the guide rail 1. At this time, the steel ball 13 can be stuck in the arc groove 2411, thereby slowing down the upward trend of the frame 2.

[0041] Reference Figure 2 , Figure 3 as well as Figure 5 The limiting component is a limiting hook, which includes a hooking part 251 and a sliding part 252. Both the hooking part 251 and the sliding part 252 are rod-shaped structures. A connecting part 253 is fixedly connected between the hooking part 251 and the sliding part 252, making the hooking part 251, the sliding part 252, and the connecting part 253 U-shaped. The length direction of both the hooking part 251 and the sliding part 252 is parallel to the width direction of the frame 2.

[0042] Reference Figure 2 , Figure 3 as well as Figure 5 A sliding sleeve 4 is fixedly connected to the upper surface of the guide shoe 23. The sliding sleeve 4 is located on the side of the first mounting block 243 away from the brake pad 241, and the length direction of the sliding sleeve 4 is parallel to the width direction of the frame 2. The sliding sleeve 4 has a second sliding groove 41, the length direction of which is parallel to the width direction of the frame 2. The sliding part 252 slides along the width direction of the frame 2 and is connected to the second sliding groove 41. The mounting rod 244 is located on the side of the first mounting block 243 near the sliding sleeve 4 and has a first limiting hole 2441 for the hooking part 251 to hook. Under normal conditions, the hooking part 251 is engaged in the first limiting hole 2441, and at this time, there is a gap between the brake pad 241 and the first sliding groove 11.

[0043] Reference Figure 2 , Figure 3 as well as Figure 5The upper surface of the guide shoe 23 is provided with a fourth elastic element, a fourth spring 261, which forces the connecting part 253 to slide closer to the sliding sleeve 4. The axis of the fourth spring 261 is parallel to the width direction of the frame 2. A second mounting block 26 is fixedly connected to the upper surface of the guide shoe 23 on the side of the sliding part 252 away from the sliding sleeve 4. The fourth spring 261 is located between the sliding part 252 and the second mounting block 26. One end of the fourth spring 261 is fixedly connected to the second mounting block 26, and the other end of the fourth spring 261 is fixedly connected to the side of the sliding part 252 away from the sliding sleeve 4. Under normal conditions, the fourth spring 261 forces the sliding part 252 to slide closer to the sliding sleeve 4, so that the hook part 251 is always locked in the first limiting hole 2441. Therefore, during normal operation, the sliding part 252 may move, causing the hook part 251 to disengage from the first limiting hole 2441.

[0044] Reference Figure 2 , Figure 3 as well as Figure 5 A phase change layer 42 is provided inside the second sliding groove 41. The phase change layer 42 is covered with a protective film. The protective film is elastically deformable. The phase change layer 42 abuts against the sliding part 252 located in the second sliding groove 41 through the protective film. The sliding sleeve 4 is provided with a heat-conducting element, which is a heat-conducting strip 43. The heat-conducting strip 43 is located on the side of the sliding sleeve 4 away from the limiting hook. The end of the heat-conducting strip 43 away from the sliding sleeve 4 has a heat-conducting surface 44. The heat-conducting surface 44 abuts against the groove wall of the first sliding groove 11. The other end of the heat-conducting strip 43 passes through the sliding sleeve 4 and is located inside the phase change layer 42. When the elevator car encounters a sudden situation and descends rapidly, the heat-conducting surface 44 rubs against the wall of the first sliding groove 11, causing the heat-conducting surface 44 to quickly generate heat. The heat-conducting strip 43 can transfer heat to the phase change layer 42, causing the phase change layer 42 to undergo a phase change. After the phase change layer 42 undergoes a phase change, it will force the sliding part 252 to slide. After the sliding part 252 slides, it will drive the hook part 251 to slide through the connecting part 253, causing the hook part 251 to disengage from the first limiting hole 2441. At this time, after the mounting rod 244 is released from the limit, the first spring 242 forces the mounting rod 244 to slide, causing the brake pad 241 to abut against the wall of the first sliding groove 11. The brake pad 241 rubs against the wall of the first sliding groove 11, thereby hindering the frame 2 from sliding upward, thus slowing down the descent of the car.

[0045] Reference Figure 2 , Figure 3 as well as Figure 5The frame 2 is equipped with a semiconductor cooling chip 45, one end of which is connected to the heat-conducting surface 44. Under normal operation, the semiconductor cooling chip 45 can cool the heat-conducting surface 44 after being energized, thereby reducing the heat generated by the heat-conducting surface 44. This prevents the heat generated by the friction between the heat-conducting surface 44 and the wall of the first sliding groove 11 from causing a significant phase change in the phase change layer 42, which would cause the hook part 251 to disengage from the first limiting hole 2441. When the frame 2 rises rapidly, the heat-conducting surface 44 generates heat quickly. The semiconductor cooling chip 45 cannot cool the heat-conducting surface 44 in time, and the heat-conducting strip 43 transfers the heat to the phase change layer 42, causing a significant phase change in the phase change layer 42. After the phase change layer 42 undergoes a phase change, the sliding part 252 slides, thereby causing the hook part 251 to disengage from the first limiting hole 2441.

[0046] Reference Figure 2 , Figure 3 as well as Figure 5 The frame is equipped with a second braking assembly, which includes an ejector box 5. A hidden cavity 27 is formed on the upper side of the frame near the cavity wall. The ejector box 5 is slidably connected to the hidden cavity 27. The frame is equipped with a second elastic element, which is a second spring 53, to force the ejector box 5 out of the hidden cavity 27. The second spring 53 is located inside the hidden cavity 27, with one end fixedly connected to the cavity wall of the hidden cavity 27 and the other end fixedly connected to the side of the spring box. Under normal conditions, the second spring 53 forces the ejector box 5 out of the hidden cavity 27.

[0047] Reference Figure 2 , Figure 3 as well as Figure 5 The frame is equipped with a limiting component to restrict the ejection box 5. When the ejection box 5 is located within the hidden cavity 27, the limiting component restricts the ejection box 5. The limiting component is a limiting rod 271. A third sliding groove 274 is provided on the upper surface of the frame, which connects to the hidden cavity 27. The limiting rod 271 slides vertically and is connected to the third sliding groove 274. A limiting block 51 is fixedly connected inside the ejection box 5. The limiting block 51 has a second limiting hole 52 for the limiting rod 271 to engage. When the ejection box 5 is located within the hidden cavity 27, the limiting rod 271 engages within the second limiting hole 52, thereby forcing the ejection box 5 to be fixed.

[0048] Reference Figure 2 , Figure 3 as well as Figure 5The inner wall of the hidden cavity 27 is provided with a third elastic element that forces the limiting rod 271 to slide upward and disengage the limiting rod 271 from the second limiting hole 52. The third elastic element is a third spring 272, which is located inside the hidden cavity 27 and is coaxially sleeved on the limiting rod 271. A second retaining ring 273 is arranged around the outer peripheral wall of the limiting rod 271. One end of the third spring 272 is fixedly connected to the upper top wall of the hidden cavity 27, and the other end of the third spring 272 is fixedly connected to the second retaining ring 273.

[0049] Reference Figure 2 , Figure 3 as well as Figure 5 The position of the upper opening of the first sliding groove 11 corresponds to the position of the sliding part 252 of the limiting hook. Under normal conditions, the lower surface of the sliding part 252 distributes the groove opening of the first sliding groove 11, thereby blocking the limiting rod 271 and reducing the possibility of the limiting rod 271 sliding upward under the action of the third spring 272. This allows the limiting rod 271 to be locked in the second limiting hole 52 under normal conditions, thereby limiting the ejection box 5.

[0050] Reference Figure 2 , Figure 3 as well as Figure 5 The lower surface of the sliding part 252 of the first limiting hole 2441 is provided with a clearance groove 254 in the vertical direction. When the hook part 251 hooks into the first limiting hole 2441, the clearance groove 254 is located on the side of the first sliding groove 11 near the sliding sleeve 4. When the friction of the brake pad 241 has a small effect on hindering the movement of the frame 2, the heat of the heat-conducting sheet continues to rise, which will cause the phase change layer 42 to continuously undergo phase change, thereby causing the sliding part 252 to continue to slide. When the sliding part 252 slides to the position corresponding to the clearance groove 254 and the limiting rod 271, the limiting rod 271 slides upward under the action of the third spring 272, and the upper part of the limiting rod 271 slides into the clearance groove 254, thereby causing the lower end of the limiting rod 271 to disengage from the second limiting hole 52, so as to release the limitation of the limiting rod 271 on the ejector box 5. At this time, the ejector box 5 can eject the hidden cavity 27 under the action of the second spring 53.

[0051] Reference Figure 2 , Figure 3 as well as Figure 5 The second braking assembly also includes an airbag housed within the ejection box 5. An inflation assembly for inflating the airbag is mounted on the frame. A micro-motion device is fixedly connected to the contact surface between the frame and the ejection box 5, and this micro-motion device is connected to the inflation assembly. When the ejection box 5 is ejected, the micro-motion device is triggered, thereby controlling the inflation assembly to inflate the airbag, causing the airbag to press against the wall to impede the upward movement of the frame 2, thus slowing the descent of the elevator car.

[0052] The implementation principle of a counterweight frame for an elevator according to an embodiment of this application is as follows: During the rapid descent of the car, the counterweight will drive the frame 2 to rise rapidly. During the rapid rise of the frame 2, the heat-conducting strip 43 comes into contact with the guide rail 1. Therefore, the heat-conducting strip 43 will generate heat rapidly during the friction with the guide rail 1. This heat cannot be dissipated in time, so the heat-conducting strip 43 will transfer the heat to the phase change layer 42, causing the phase change layer 42 to undergo a phase change. After the phase change layer 42 undergoes a phase change, its volume will increase, thereby forcing the sliding part 252 to slide. When the sliding part 252 slides to a certain distance, it will release the restriction on the mounting rod 244, so that the brake pad 241 can abut against the guide rail 1 under the action of the first spring 242, thereby slowing down the rising speed of the frame 2 and thus slowing down the falling speed of the car.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A counterweight frame for an elevator, characterized in that: The system includes a frame (2), a guide rail (1), and a counterweight (3). The counterweight (3) is located inside the frame (2). Guide shoes (23) are provided on both sides of the frame (2). The guide shoes (23) are slidably connected to the guide rail (1) in the vertical direction. The guide shoes (23) are provided with a first braking assembly (24). The first braking assembly (24) includes a brake pad (241) and a first elastic element that forces the brake pad (241) to abut against the guide rail (1). The first elastic element is a first spring (242). A mounting rod (244) is fixedly connected to one side of the brake pad (241). A first mounting block (243) is fixedly connected to the upper surface of the guide shoe (23). The mounting rod (244) slides through the first mounting block (243). The first spring (242) is located between the brake pad (241) and the first mounting block (243). The first spring (242) is coaxially sleeved on the mounting rod (244). The outer peripheral wall of the mounting rod (244) is surrounded by a first retaining ring (245). One end of the first spring (242) is fixedly connected to the first retaining ring (245), and the other end of the first spring (242) is fixedly connected to the first mounting block (243). The frame (2) is provided with a limiting component for limiting the brake pad (241). The limiting component includes a limiting hook. The limiting hook includes a hooking part (251) and a sliding part (252). Both the hooking part (251) and the sliding part (252) are rod-shaped structures. A connecting part (253) is fixedly connected between the hook part (251), the sliding part (252) and the connecting part (253) are U-shaped. The length direction of the hook part (251) and the sliding part (252) are parallel to the width direction of the frame (2) and are slidably connected to the frame (2). One end of the limiting hook is hooked to the brake pad (241). The other end of the limiting hook is provided with a phase change layer (42) that can force the limiting hook to slide. The phase change layer (42) is provided with a heat-conducting strip (43). One end of the heat-conducting strip (43) is connected to the phase change layer (42). The other end of the heat-conducting strip (43) abuts against the guide rail (1). A sliding sleeve (4) is fixedly connected to the upper surface of the guide shoe (23). The mounting rod (251) is fixedly connected to the guide shoe (252). 44) A first limiting hole (2441) is provided on the side of the first mounting block (243) near the sliding sleeve (4) for the hooking part (251) to hook. Under normal conditions, the hooking part (251) is locked in the first limiting hole (2441). At this time, there is a gap between the brake pad (241) and the first sliding groove (11). The upper surface of the guide shoe (23) is provided with a fourth elastic element that forces the connecting part (253) to slide towards the sliding sleeve (4). The fourth elastic element is a fourth spring (261). The upper surface of the guide shoe (23) is fixedly connected to the second mounting block (26) on the side of the sliding part (252) away from the sliding sleeve (4). The fourth spring (261) is located between the sliding part (252) and the second mounting block (26).One end of the fourth spring (261) is fixedly connected to the second mounting block (26), and the other end of the fourth spring (261) is fixedly connected to the side of the sliding part (252) away from the sliding sleeve (4). Normally, the fourth spring (261) forces the sliding part (252) to slide closer to the sliding sleeve (4), thus ensuring that the hook part (251) is always engaged within the first limiting hole (2441). Therefore, during normal operation, the sliding part (252) may move, potentially causing the hook part (251) to disengage from the first limiting hole (2441).

2. The counterweight frame for an elevator according to claim 1, characterized in that: The phase change layer (42) is provided with a protective film on its exterior. The protective film is elastically deformable. The phase change layer (42) abuts against the limiting hook located in the second sliding groove (41) through the protective film.

3. A counterweight frame for an elevator according to claim 2, characterized in that: The frame (2) is provided with a semiconductor cooling chip (45), one end of which is connected to a heat-conducting strip (43). When the semiconductor cooling chip (45) is powered on, it can cool the heat-conducting strip (43).

4. A counterweight frame for an elevator according to claim 1, characterized in that: The contact surface between the guide rail (1) and the brake pad (241) is provided with a number of steel balls (13). The steel balls (13) slide and connect to the guide rail (1) in the direction close to the brake. The brake pad (241) is a magnetic piece. The brake pad (241) has a number of arc-shaped grooves (2411). The arc-shaped grooves (2411) are distributed vertically on the brake pad (241).

5. A counterweight frame for an elevator according to claim 1, characterized in that: The frame (2) is provided with a second braking component, which includes an ejection box (5) and an airbag disposed in the ejection box (5). The frame (2) is provided with a second elastic member to eject the ejection box (5) and a limiting member to limit the ejection box (5).

6. A counterweight frame for an elevator according to claim 5, characterized in that: The frame (2) has a hidden cavity (27), and the pop-out box (5) is slidably connected to the hidden cavity (27). The upper surface of the frame (2) has a third sliding groove (274) communicating with the hidden cavity (27) in the vertical direction. The limiting member is a limiting rod (271), which is slidably connected to the third sliding groove (274). The pop-out box (5) is provided with a limiting block (51), and the limiting block (51) has a supply for... The second limiting hole (52) is used to lock the limiting rod (271). The frame (2) is provided with a third elastic element that forces the limiting rod (271) to slide upward to disengage from the second limiting hole (52). The limiting hook (25) blocks the upper groove of the third sliding groove (274). The limiting hook (25) is located on the side of the third sliding groove (274) near the sliding sleeve (4) and has an avoidance groove (254) that can avoid the limiting rod (271).

7. A counterweight frame for an elevator according to claim 6, characterized in that: A micro switch (54) is provided on the contact surface between the frame (2) and the ejection box (5). The frame (2) is provided with an inflation component, which is connected to the airbag. The micro switch (54) is connected to the inflation component.

8. A counterweight frame for an elevator according to claim 1, characterized in that: The frame (2) has a sliding groove, the counterweight (3) is slidably connected in the sliding groove, the frame (2) has a disassembly port (21) connected to the sliding groove, and the frame (2) is provided with a baffle (211) at the disassembly port (21).

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