Top rushing detection device for traction elevator

Abstract

The invention relates to a traction elevator roof rushing detection device which comprises a rack, an installation frame and a supporting cover are vertically installed on the rack in a sliding mode, an elastic bearing mechanism is arranged on the installation frame, the installation frame abuts against the supporting cover through the bearing mechanism, an elevator counterweight is hung on the installation frame, and an alarm elastic piece is installed in the supporting cover. The two ends of the alarm elastic piece abut against the supporting cover and the rack respectively, the minimum pressure of the bearing mechanism on the supporting cover is larger than the thrust of the alarm elastic piece on the supporting cover, a trigger switch connected with an alarm system is installed on the top wall of the rack, and a trigger rod of the trigger switch abuts against the top wall of the supporting cover. When the elevator runs normally, the bearing mechanism abuts against the supporting cover, the supporting cover is static when the elevator runs normally, when the elevator rushes to the top, the counterweight pier bottom weightlessness is achieved, the pulling force of the counterweight on the bearing mechanism disappears, the supporting cover bounces upwards under the thrust of the alarm elastic piece, the trigger rod starts the trigger switch, and the trigger switch starts the alarm system to give an alarm.

Description

Technical Field

[0001] The present application relates to the field of traction elevator safety systems, and in particular to a traction elevator top impact detection device. Background Art

[0002] In the driving system of the traction elevator, it is necessary to monitor the elevator's top collision. When the elevator hits the top, the maintenance department needs to be notified in time for repair to prevent accidents.

[0003] A common elevator top-impact alarm system usually includes two vertical metal bars and two springs mounted on metal plates. The metal bars are vertically slidably installed on the frame where the elevator counterweight is installed. The counterweight is connected to the lower end of the metal bars through a traction belt. A retaining ring is provided on the top wall of the metal bar, and the two ends of the spring respectively press against the retaining ring and the top wall of the frame where the counterweight is installed.

[0004] A trigger switch is also installed on the frame. The top walls of the metal rod at the triggering part of the trigger switch correspond to each other. When the elevator is working normally, the counterweight is hung on the spring through the traction belt. The spring is compressed by the counterweight, the metal rod slides down, and the metal rod is separated from the triggering part of the trigger switch. When the elevator hits the top, the counterweight will hit the bottom, causing the counterweight to relax the pressure on the spring. The spring returns to push the metal rod up, and the rising metal rod presses against the triggering part of the trigger switch, and the trigger switch is activated to alarm.

[0005] However, in taller buildings, as the elevator descends, the counterweight rises under the action of the winch. Since the counterweight and the elevator car balance each other, when the elevator descends at a faster speed, when the elevator car stops, the elevator counterweight will lose weight due to inertia. The tension applied by the counterweight on the spring may disappear, causing the spring to reset and trigger the switch, resulting in a false alarm, causing the elevator to stop suddenly. While it is easy to damage the elevator, the passengers inside the elevator are also prone to panic. Summary of the invention

[0006] In order to solve the problem that the top-impact alarm device of a traditional traction elevator may be accidentally triggered during the normal operation of the elevator, the present application provides a traction elevator top-impact detection device.

[0007] The present application provides a traction elevator top impact detection device adopts the following technical solution: A traction elevator top-impact detection device comprises a frame, a mounting frame is vertically slidably mounted on the frame, a support cover is vertically slidably mounted on the frame, a load-bearing mechanism is arranged on the mounting frame, the load-bearing mechanism is elastic, the mounting frame is pressed against the support cover through the load-bearing mechanism, the elevator counterweight is hung on the mounting frame through a traction steel belt, an alarm elastic member is installed in the support cover, two ends of the alarm elastic member are respectively pressed against the inner top wall of the support cover and the frame and are in a compressed state, the minimum pressure of the load-bearing mechanism on the support cover is greater than the thrust of the alarm elastic member on the support cover, a trigger switch is installed on the top wall of the frame, the trigger switch is connected to an alarm system, and one end of a trigger rod of the trigger switch is pressed against the top wall of the support cover.

[0008] Through the above technical solution, when the elevator is operating normally, the elastic load-bearing mechanism presses against the support cover, so that the support cover is in a static state during the normal operation of the elevator. When the elevator hits the top, the counterweight will lose weight at the bottom of the pier, and then the pulling force of the counterweight on the mounting frame on the load-bearing mechanism will disappear. The support cover also bounces upward under the thrust of the alarm elastic part, and then the support cover activates the trigger switch through the trigger rod, and the trigger switch activates the alarm system alarm.

[0009] Optionally, the mounting frame includes at least one connecting rod, the load-bearing mechanism includes a load-bearing spring and a baffle, the top wall of the frame is provided with sliding holes corresponding to the connecting rods one by one, the connecting rods vertically slide through the sliding holes, a section of the connecting rod located at the upper end of the frame is defined as a load-bearing section, the load-bearing spring is sleeved on the load-bearing section, the baffle is installed at the upper end of the load-bearing section, the support cover is slidably sleeved on the load-bearing section, the two ends of the load-bearing spring are respectively pressed against the bottom wall of the baffle and the top wall of the support cover, and the elevator counterweight is hung on the lower end of the connecting rod.

[0010] Optionally, the alarm elastic member adopts a spring, and the spring is defined as an alarm spring. The alarm spring is located in the support cover, and the alarm spring is sleeved on the load-bearing section.

[0011] Optionally, a connecting block is coaxially arranged on the baffle, and the connecting block is in the shape of a hexagonal column. A threaded hole is coaxially opened on one end face of the connecting block, and the threaded hole passes through the connecting block and the baffle in sequence. An external thread matching the threaded hole is arranged on the load-bearing section, and the baffle and the connecting block are threadedly mounted on the load-bearing section.

[0012] Optionally, the baffle includes a first dividing plate and a second dividing plate, a first hole is penetrated on one side of the first dividing plate, the No. 1 hole penetrates the side wall of the No. 1 dividing plate, and a No. 2 hole is penetrated on one side of the No. 2 dividing plate, and the No. 2 hole also penetrates the side wall of the No. 2 dividing plate, and the side wall of the No. 1 dividing plate penetrated by the No. 1 hole and the side wall of the No. 2 dividing plate penetrated by the No. 2 hole are mutually spliced ​​surfaces. When the No. 1 dividing plate and the No. 2 dividing plate are spliced ​​together, the No. 1 hole and the No. 2 hole are spliced ​​together to form a circular hole, and a plurality of annular grooves are coaxially opened on the side wall of the load-bearing section, and the annular grooves are spaced apart along the axial direction of the load-bearing section, the width of the annular grooves is the same as the thickness of the No. 1 dividing plate and the No. 2 dividing plate, the inner circle diameter of the annular grooves is the same as the diameter of the No. 1 hole or the No. 2 hole, and the No. 1 dividing plate and the No. 2 dividing plate are both clamped in the annular grooves and spliced ​​together.

[0013] Optionally, two slide grooves are provided on the surface where the No. 1 dividing plate and the No. 2 dividing plate are spliced, and the slide grooves are located on both sides of the No. 1 hole, and the slide grooves penetrate the end surface of the No. 1 dividing plate; two elastic plates are provided on the splicing surface of the No. 2 dividing plate and the No. 1 dividing plate, and the elastic plates are respectively located on both sides of the No. 2 hole and correspond to the slide grooves; a protrusion is provided on the elastic plate, and a clamping groove is provided on the side wall of the slide groove, and the clamping groove and the protrusion are hooked with each other, and when the No. 1 dividing plate and the No. 2 dividing plate are spliced ​​with each other, the elastic plate is slidably installed in the slide groove, and the protrusion is hooked in the clamping groove.

[0014] Optionally, an adjusting tube is arranged on the support cover coaxially with its sliding direction, the adjusting tube is threadedly connected to the support cover, the load-bearing section slides through the adjusting tube, the lower end surface of the adjusting tube is pressed against the upper end of the alarm spring, and the lower end of the load-bearing spring is slidably sleeved on the upper end of the adjusting tube.

[0015] Optionally, a mounting tube is arranged inside the support cover coaxially with its sliding direction, the adjusting tube is threadedly installed in the mounting tube, the inner wall of the lower end of the mounting tube is smooth, and the upper end of the alarm spring is located inside the smooth end of the mounting tube.

[0016] Optionally, scale lines are provided on the upper end side wall of the regulating tube along its axis.

[0017] To sum up, when the elevator is operating normally, the elastic load-bearing mechanism presses against the support cover, so that the support cover is stationary during the normal operation of the elevator. When the elevator hits the top, the counterweight will lose weight at the bottom of the pier, and the pulling force of the counterweight on the mounting frame on the load-bearing mechanism will disappear. The support cover also bounces upward under the thrust of the alarm elastic part, and then the support cover activates the trigger switch through the trigger rod, and the trigger switch activates the alarm system alarm. At the same time, it is installed in buildings with different floor heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of Example 1 of the present application.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of Example 2 of the present application.

[0020] Figure 3 It is a cross-sectional schematic diagram of the support cover of this application.

[0021] Figure 4 It is a cross-sectional schematic diagram of the baffle of Example 2 of the present application.

[0022] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be exaggerated relative to other elements to help improve understanding of the embodiments of the present invention.

[0023] Figure numerals: 1, frame; 11, sliding hole; 2, mounting frame; 21, connecting rod; 211, annular groove; 212, load-bearing section; 3, support cover; 31, adjusting tube; 32, mounting tube; 321, scale line; 4, load-bearing mechanism; 41, load-bearing spring; 42, baffle; 421, partition plate No. 1; 422, partition plate No. 2; 423, hole No. 1; 424, hole No. 2; 425, slide groove; 4251, slot; 426, elastic plate; 4261, protrusion; 43, connecting block; 5, alarm elastic member; 51, alarm spring; 6, trigger switch; 61, trigger rod; 7, threaded hole. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-4 This application is described in further detail. Example 1

[0025] Embodiment 1 of the present application discloses a traction elevator top impact detection device, referring to Figure 1 , including a frame 1, on which a mounting frame 2, a supporting cover 3 and an alarm elastic member 5 are arranged, and on which a load-bearing mechanism 4 is also arranged.

[0026] Reference Figure 1 , wherein the mounting frame 2 includes at least one connecting rod 21, and two connecting rods are selected in this embodiment. Accordingly, the supporting cover 3 and the alarm elastic member 5 are each provided with two corresponding ones. Two sliding holes 11 are provided on the top wall of the frame 1, and the axis of the sliding hole 11 is vertical. The connecting rod 21 is vertically slidably installed in the sliding hole 11, and the end of the connecting rod 21 located on the upper side of the frame 1 is defined as a load-bearing section 212.

[0027] Reference Figure 1The load-bearing mechanism 4 includes two load-bearing springs 41 and two baffles 42. The load-bearing spring 41 is sleeved on the load-bearing section 212. The baffle 42 is in the shape of a circular plate. A connecting block 43 in the shape of a regular hexagonal column is coaxially and integrally arranged on the baffle 42. A threaded hole 7 is coaxially opened on one end face of the connecting block 43. The threaded hole 7 passes through the connecting block 43 and the baffle 42 in sequence. An external thread that is threadedly matched with the threaded hole 7 is integrally arranged on the load-bearing section 212. The baffle 42 and the connecting block 43 are threadedly installed on the upper end of the load-bearing section 212. The counterweight of the elevator is hung on the lower end of the connecting rod 21 through the traction steel belt. Under the pulling force of the counterweight, the baffle 42 presses against the upper end of the load-bearing spring 41, the lower end of the load-bearing spring 41 presses against the top wall of the support cover 3, the support cover 3 presses against the top wall of the frame 1, and the load-bearing spring 41 is in a compressed state.

[0028] Reference Figure 1 and Figure 3 The support cover 3 is cylindrical, and a mounting hole is coaxially opened on the top wall of the support cover 3. A mounting tube 32 is coaxially and integrally arranged on the inner top wall of the support cover 3. The inner diameter of the mounting tube 32 is the same as the aperture of the mounting hole. An adjusting tube 31 is threadedly installed in the mounting tube 32, and the adjusting tube 31 is slidably installed on the load-bearing section 212.

[0029] Reference Figure 1 and Figure 3 The upper end of the adjusting tube 31 slides into the lower end of the load-bearing spring 41, and the upper end side wall of the adjusting tube 31 is provided with length scales at intervals along its length direction, and the adjustment distance of the adjusting tube 31 can be observed more intuitively through the length scales. At the same time, the upper end of the alarm spring 51 is located at the lower end of the mounting tube 32, and the inner wall of the mounting tube 32 where the alarm spring 51 is located is smooth, so that when the alarm spring 51 is limited by the mounting tube 32, the alarm spring 51 will not be stuck on the thread when it is pressed, causing excessive compression, and thus the alarm spring 51 will not be mis-triggered due to excessive elastic force caused by excessive compression.

[0030] Reference Figure 1 and Figure 3 A trigger switch 6 is also installed on the top wall of the frame 1. The trigger rod 61 of the trigger switch 6 is pressed against the top wall of the support cover 3. When the support cover 3 slips, the trigger rod 61 is triggered, thereby activating the trigger switch 6. The trigger switch 6 is connected to the alarm system. When the trigger switch 6 is triggered, the alarm system will sound an alarm.

[0031] Reference Figure 1 and Figure 3, the alarm elastic member 5 is a spring, which is defined as an alarm spring 51. The alarm spring 51 is also sleeved on the load-bearing section 212 and is located inside the support cover 3. The lower end of the alarm spring 51 is pressed against the top wall of the frame 1, and the upper end of the alarm spring 51 is pressed against the bottom wall of the adjustment tube 31. Under the pressure of the support spring on the support cover 3, the alarm spring 51 is in a compressed state. The compression elastic force of the alarm spring 51 is less than the compression elastic force of the load-bearing spring 41, and the compression elastic force of the alarm spring 51 is greater than the dead weight of the support cover 3. When the load-bearing spring 41 is in a zero-load state, the alarm spring 51 will push the support cover 3 to rise and push the trigger rod 61.

[0032] At the same time, according to the different floor heights, the compression amount of the alarm spring 51 is adjusted by rotating the adjusting tube 31, and then the elastic force of the alarm spring 51 after being compressed is adjusted to adapt to different floor heights. During the operation of the elevator, the minimum elastic force of the support spring on the support cover 3 is always greater than the elastic force of the alarm spring 51, ensuring that during normal operation, the support cover 3 is always stably pressed against the frame 1 by the support spring and will not trigger the trigger switch 6.

[0033] When the elevator hits the top and the counterweight pier bottom, the counterweight loses weight, the tension generated on the load-bearing spring 41 disappears, the load-bearing spring 41 resets, the alarm spring 51 resets and pushes the support cover 3 to rise, the rising support cover 3 pushes the trigger rod 61, and the trigger rod 61 starts the trigger switch 6 to sound an alarm.

[0034] The implementation principle of a traction elevator top-impact detection device in the first embodiment of the present application is as follows: during the normal operation of the elevator, the counterweight is supported by the load-bearing spring 41. Since the maximum elastic force of the alarm spring 51 is less than the minimum pressure of the load-bearing spring 41 on the support cover 3 plus the weight of the support cover 3, the support cover 3 is always in a stationary state, and the trigger switch 6 remains untriggered. When the elevator top-impacts, the counterweight will lose weight at the bottom of the pier at the same time as the car top-impacts, causing the support spring to reset, thereby causing the pressure of the support spring on the support cover 3 to decrease sharply, and the elastic force of the alarm spring 51 will lift the support cover 3, and the support cover 3 will touch the trigger rod 61, and the trigger rod 61 will trigger the trigger switch 6, and the trigger switch 6 will start the alarm system to sound an alarm.

[0035] At different floor heights, the compression amount of the alarm spring 51 after the support cover 3 is pressed against the top wall of the frame 1 is adjusted by rotating the adjustment rod, and the initial elastic force of the alarm spring 51 is increased or decreased to adapt to the change in the minimum pressure of the support spring on the support cover 3 during the operation of elevators with different floor heights.

[0036] Under different load conditions, the distance between the support cover 3 and the baffle plate 42 is adjusted by rotating the baffle plate 42 and the connecting block 43, thereby adapting support springs of different lengths under different load conditions. Example 2

[0037] The difference between Example 2 of the present application and Example 1 is that: Figure 2 and Figure 4 The baffle 42 includes a first dividing plate 421 and a second dividing plate 422. The first dividing plate 421 and the second dividing plate 422 are both semicircular. The first dividing plate 421 and the second dividing plate 422 can be assembled together to form a complete circular plate.

[0038] Reference Figure 2 and Figure 4 A No. 1 hole 423 is coaxially opened on the No. 1 dividing plate 421, and the No. 1 hole 423 penetrates the plane side wall of the No. 1 dividing plate 421. A No. 2 hole 424 is coaxially opened on the No. 2 dividing plate 422, and the No. 2 hole 424 penetrates the plane side wall of the No. 2 dividing plate 422. When the No. 1 dividing plate 421 and the No. 2 dividing plate 422 are assembled with each other, the No. 1 hole 423 and the No. 2 hole 424 are assembled with each other to form a circular hole.

[0039] Reference Figure 2 and Figure 4 A plurality of annular grooves 211 are coaxially opened on the side wall of the connecting rod 21, the width of the annular groove 211 is the same as the thickness of the No. 1 dividing plate 421 and the No. 2 dividing plate 422, and the inner diameter of the annular groove 211 is the same as the aperture of the No. 1 hole 423 or the No. 2 hole 424. The baffle 42 can be fixed by sliding the No. 1 dividing plate 421 and the No. 2 dividing plate 422 into the annular groove 211.

[0040] Reference Figure 2 and Figure 4 At the same time, two slide grooves 425 are provided on the plane side wall of the No. 1 dividing plate 421. The slide grooves 425 are respectively located on both sides of the No. 1 hole 423. When the No. 1 dividing plate 421 is placed horizontally, the slide grooves 425 penetrate the upper plate surface of the No. 1 dividing plate 421. Two steel elastic plates 426 are integrally provided on the plane side wall of the No. 2 dividing plate 422. The elastic plates 426 are located on both sides of the No. 2 hole 424, and the elastic plates 426 and the slide grooves 425 are slidably matched. The second dividing plate 422 is placed horizontally, and a protrusion 4261 is integrally provided on the lower surface of the elastic plate 426, and a clamping groove 4251 is provided on the bottom of the groove 425 to be embedded with the protrusion 4261. When the first dividing plate 421 and the second dividing plate 422 are assembled with each other, the two elastic plates 426 are respectively slidably installed in the two grooves 425, and the two protrusions 4261 are respectively embedded in the two clamping grooves 4251, and the elastic plates 426 are located outside the annular groove 211. After being assembled with each other, the plate surface of the elastic plate 426 is flush with the notch of the clamping groove 4251 that penetrates the plate surface of the first dividing plate 421. When the position of the baffle plate 42 needs to be replaced, the position of the baffle plate 42 is adjusted by pulling the first dividing plate 421 and the second dividing plate 422 out of the annular groove 211 and then replacing the annular groove 211 to insert the baffle plate 42.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A traction elevator top impact detection device, comprising a frame (1), on which a mounting frame (2) is vertically slidably mounted, characterized in that: A support cover (3) is vertically slidably mounted on the frame (1), a load-bearing mechanism (4) is arranged on the mounting frame (2), the load-bearing mechanism (4) is elastic, the mounting frame (2) is pressed against the support cover (3) via the load-bearing mechanism (4), the elevator counterweight is hung on the mounting frame (2) via a traction steel belt, an alarm elastic member (5) is installed in the support cover (3), the two ends of the alarm elastic member (5) are respectively pressed against the inner top wall of the support cover (3) and the frame (1) and are in a compressed state, the load-bearing mechanism (4) is pressed against the The minimum pressure of the support cover (3) plus the deadweight of the support cover (3) is greater than the thrust of the alarm elastic member (5) on the support cover (3); the thrust of the alarm elastic member (5) on the support cover (3) is greater than the deadweight of the support cover (3) and the resistance of the load-bearing mechanism (4) to the rebound of the alarm elastic member (5) under zero load; a trigger switch (6) is installed on the top wall of the frame (1); the trigger switch (6) is connected to the alarm system; one end of the trigger rod (61) of the trigger switch (6) is pressed against the top wall of the support cover (3).

2. A traction elevator top impact detection device according to claim 1, characterized in that: The mounting frame (2) comprises at least one connecting rod (21), the load-bearing mechanism (4) comprises a load-bearing spring (41) and a baffle (42), a sliding hole (11) corresponding to the connecting rod (21) is opened on the top wall of the frame (1), the connecting rod (21) vertically slides through the sliding hole (11), a section of the connecting rod (21) located at the upper end of the frame (1) is defined as a load-bearing section (212), the load-bearing spring (41) is sleeved on the load-bearing section (212), the baffle (42) is installed at the upper end of the load-bearing section (212), the support cover (3) is slidably sleeved on the load-bearing section (212), the two ends of the load-bearing spring (41) respectively press against the bottom wall of the baffle (42) and the top wall of the support cover (3), and the elevator counterweight is hung on the lower end of the connecting rod (21).

3. A traction elevator top impact detection device according to claim 2, characterized in that: The alarm elastic member (5) is a spring, which is defined as an alarm spring (51). The alarm spring (51) is located in the support cover (3). The alarm spring (51) is sleeved on the load-bearing section (212).

4. A traction elevator top impact detection device according to claim 2, characterized in that: A connecting block (43) is coaxially arranged on the baffle (42), the connecting block (43) being in the shape of a hexagonal column, a threaded hole (7) is coaxially opened on one end surface of the connecting block (43), the threaded hole (7) passes through the connecting block (43) and the baffle (42) in sequence, an external thread matching the threaded hole (7) is arranged on the load-bearing section (212), and the baffle (42) and the connecting block (43) are threadedly mounted on the load-bearing section (212).

5. A traction elevator top impact detection device according to claim 2, characterized in that: The baffle plate (42) comprises a first dividing plate (421) and a second dividing plate (422); a first hole (423) is formed through one side of the first dividing plate (421); the first hole (423) penetrates the side wall of the first dividing plate (421); a second hole (424) is formed through one side of the second dividing plate (422); the second hole (422) also penetrates the side wall of the second dividing plate (422); a side wall of the first dividing plate (421) penetrated by the first hole (423) and a side wall of the second dividing plate (422) penetrated by the second hole (424) are mutually joined surfaces; when the first dividing plate (421) and the second dividing plate (422) are joined, After the first and second dividing plates (421 and 422) are assembled, the first hole (423) and the second hole (424) are assembled together to form a circular hole, a plurality of annular grooves (211) are coaxially opened on the side wall of the load-bearing section (212), the annular grooves (211) are arranged at intervals along the axial direction of the load-bearing section (212), the width of the annular grooves (211) is the same as the thickness of the first dividing plate (421) and the second dividing plate (422), the inner diameter of the annular grooves (211) is the same as the diameter of the first hole (423) or the second hole (424), and the first dividing plate (421) and the second dividing plate (422) are both clamped in the annular grooves (211) and assembled together.

6. A traction elevator top impact detection device according to claim 5, characterized in that: Two slide grooves (425) are provided on the surface where the first sub-plate (421) and the second sub-plate (422) are joined. The slide grooves (425) are located on both sides of the first hole (423). The slide grooves (425) penetrate the end surface of the first sub-plate (421). Two elastic plates (426) are provided on the surface where the second sub-plate (422) and the first sub-plate (421) are joined. The elastic plates (426) are respectively located on both sides of the second hole (424) and are connected to the slide grooves. The grooves (425) correspond to each other, a protrusion (4261) is provided on the elastic plate (426), a clamping groove (4251) is provided on the side wall of the slide groove (425), the clamping groove (4251) and the protrusion (4261) are hooked with each other, and when the first dividing plate (421) and the second dividing plate (422) are assembled with each other, the elastic plate (426) is slidably installed in the slide groove (425), and the protrusion (4261) is hooked in the clamping groove (4251).

7. A traction elevator top impact detection device according to claim 3, characterized in that: An adjusting tube (31) is arranged on the support cover (3) coaxially with the sliding direction thereof, the adjusting tube (31) is threadedly connected to the support cover (3), the load-bearing section (212) slides through the adjusting tube (31), the lower end surface of the adjusting tube (31) is pressed against the upper end of the alarm spring (51), and the lower end of the load-bearing spring (41) is slidably sleeved on the upper end of the adjusting tube (31).

8. A traction elevator top impact detection device according to claim 7, characterized in that: A mounting tube (32) is arranged coaxially with the sliding direction of the support cover (3), the adjusting tube (31) is threadedly mounted in the mounting tube (32), the inner wall of the lower end of the mounting tube (32) is smooth, and the upper end of the alarm spring (51) is located inside the smooth end of the mounting tube (32).

9. A traction elevator top impact detection device according to claim 8, characterized in that: A scale line (321) is provided on the upper end side wall of the regulating tube (31) along its axis.

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