Elevator state early warning device and method

Abstract

The invention relates to an elevator state early warning device and method. The device comprises an abutting head arranged on a box base, an elastic pushing assembly, a connecting sleeve, a spherical body, a balance block, a disturbance assembly and a sensing unit. A hole matched with the spherical body is formed in the side wall of the box base, so that the spherical body can rotate relative to the side wall. Three roll shafts are arranged on the abutting head in a pivoted mode. The elastic pushing and pressing assembly is arranged between the abutting and pressing head and the connecting sleeve and can guide the abutting and pressing head to move left and right and exert pressure on the abutting and pressing head. The connecting sleeve is connected with the spherical body and can support the elastic pushing and pressing assembly to stretch in the left-right direction. And the spherical body is matched with the balance block through a thread structure. An elastic plate body in the disturbance assembly is fixed to the balance block and extends in the plane, and elastic deformation can be generated. The sensing unit comprises a sensor body and a sensitive piece. And the sensitive piece is fixed on the elastic plate body. By means of the method, the risk probability of safety accidents caused by the fact that the perpendicularity condition of the elevator is too poor can be reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of elevator operation state monitoring, and particularly relates to an elevator state early warning device and method. BACKGROUND

[0002] Any object has its track to follow, and the elevator is no exception. The elevator car runs along two steel rails, so the installation quality of the steel rails directly affects the comfort of the elevator operation, such as stability, etc. The factors of the steel rail installation mainly include gauge, perpendicularity, alignment, deflection, step (or collapse), etc. These factors comprehensively constitute the installation quality of the steel rails and become the specific reasons affecting the comfort of the elevator operation, especially the main factors leading to horizontal vibration, so the installation factors of the steel rails also become the priority direction for improving the comfort, especially the perpendicularity.

[0003] The influence of the perpendicularity on the state of the elevator car mainly reflects in three aspects of noise, horizontal shaking and vertical shaking. That is, the poor matching state of the perpendicularity between the steel rails and the car will cause uneven friction between the guide shoe and the steel rails, thereby causing noise, and will cause the running track of the car to deviate, thereby causing the shaking of the elevator car in the horizontal and vertical directions, and the track deviation caused by the perpendicularity is the main reason leading to the vertical shaking. In addition, in the current operation practice, the elevator is usually adjusted to the perpendicularity of the steel rail / guide rail in the early stage of the installation of the steel rail, and the perpendicularity of the steel rail will not be monitored for a long period of time, and usually it is detected when the routine maintenance is performed after one or two years. However, during the long-term operation in this period, the actual situation that the perpendicularity condition of the elevator changes due to mechanical vibration, impact of the car, change of environmental humidity, etc. cannot be avoided, which causes the matching state of the perpendicularity between the car and the steel rail to gradually deteriorate, forming a hidden danger that is not easy to be discovered in time. If the perpendicularity condition is deteriorated to a certain extent and still not discovered and corrected in time, the elevator is still kept running, and it is very easy to cause a safety accident. Therefore, it is urgent to design a device that can monitor the development process of the perpendicularity state of the elevator and timely issue an early warning to inhibit the risk probability of the safety accident caused by the over-deteriorated perpendicularity state of the elevator. SUMMARY

[0004] To achieve the above-mentioned purpose, the present application provides an elevator state early warning device and method, which can monitor the operation state of the elevator, can timely issue an early warning when the perpendicularity condition of the elevator develops to a certain extent, and is helpful to reduce the risk probability of the safety accident caused by the over-deteriorated perpendicularity condition of the elevator.

[0005] The technical solution adopted by the present application to solve the technical problem is: The elevator status warning device includes a detection assembly fixed to the top of the car and matched with the head of the rail.

[0006] The detection assembly includes a housing fixedly connected to the top wall of the car, and a pressing head, a spring-loaded pushing assembly, a connecting sleeve, a spherical body, a counterweight, at least one disturbance component, and a sensing unit disposed on the housing.

[0007] A shaped hole is formed on the side wall of the housing near the rail. The axis of the shaped hole extends in the left-right direction. A spherical groove is formed on the inner wall of the shaped hole, matching the spherical surface of the spherical body, allowing the spherical body to rotate in space relative to the side wall. That is, the spherical surface of the spherical body establishes a shaped surface contact matching relationship with the spherical groove, enabling the spherical body to rotate about the axis extending in the left-right direction, and in particular, to flip up and down in the vertical direction.

[0008] Three rollers are pivotally arranged on the left end face of the pressing head, arranged alternately in a vertical direction, such that the axial direction of each roller is perpendicular to the extension direction of the rail, and the outer circumferential surface of each roller is simultaneously in tangential contact with the end face of the rail head. That is, the outer circumferential surfaces of all three rollers are partially exposed outwards relative to the left end face of the pressing head. The pressing head and the connecting sleeve are respectively connected to the left and right ends of the elastic pushing assembly.

[0009] The elastic pushing assembly and the pressing head are matched by a slide structure arranged in the left and right direction, and the elastic pushing assembly can apply an elastic force in the left and right direction to the pressing head so that the outer peripheral surface of the roller shaft can be kept in contact with the end face.

[0010] The connecting sleeve supports the elastic pushing assembly in the left-right direction. The connecting sleeve and the balance block are respectively connected to the left and right ends of the spherical body. The balance block and the spherical body are matched by a threaded structure, allowing adjustment of the left-right distance between the balance block and the spherical body. In the initial state, by adjusting the left-right distance between the balance block and the spherical body, the pressing head and the balance block can be kept approximately balanced in the plane, ensuring that the outer circumferential surface of the roller shaft is in contact with the end face simultaneously.

[0011] The disturbance component includes an elastic plate and a counterweight at one end of the elastic plate. The sensing unit includes a sensor body and a sensing element connected together. The sensor body is fixed to the base. The sensor body is equipped with a processing module / processor. The other end of the elastic plate is fixed to the counterweight, allowing the elastic plate to extend in a plane and to elastically deform in the vertical direction. The sensing element is fixed to the elastic plate and changes its physical quantity in response to the elastic deformation of the elastic plate, thereby causing the sensor body to generate a real-time sensing signal. The processor in the sensing unit processes the sensing signal and determines whether to issue a warning.

[0012] The thickness of the elastic plate is its dimensional parameter in the vertical direction. The elastic plate is made of an elastic material and needs to have good toughness and elastic deformation capacity. The elastic plate can be a plate surface or a frame. Generally, the top view of the elastic plate is elongated, and its length parameter corresponds to the measurement in the left-right direction.

[0013] Optionally, sleeves are fitted onto the pivot sections at both ends of the two rollers located at the upper and lower sides, and an elastic layer is fixedly provided on the outer wall of the sleeves. The outer peripheral surface of the elastic layer contacts the inner wall of the mounting shaft hole on the pressure head, allowing both rollers at the upper and lower sides to move relative to the pressure head in the left-right direction, while also being able to rotate normally. This design allows the two ends of the rollers at the upper and lower sides to be matched with the pressure head through sleeves, enabling the two rollers to rotate relative to the pressure head and move radially.

[0014] When the elastic pushing assembly is not pressing the pressure head against the end face, the exposed outer peripheral surfaces of the two rollers located on the upper and lower sides are in the same vertical plane, and the vertical plane is further away from the pressure head than the vertical plane of the exposed outer peripheral surface of the roller located in the center position, that is, further to the left, or in other words, closer to the end face.

[0015] Optionally, the outer diameter of the rollers located at the upper and lower sides is smaller than the outer diameter of the rollers located at the center position. This can be understood as the outer diameter of the section of the rollers located at the middle position that contacts the end face is smaller than the outer diameter of the section of the rollers located at the middle position that contacts the end face.

[0016] Optionally, a cavity is formed on the body of the pressing head. A smooth through-hole is formed at the center of the bottom surface of the cavity, and multiple through-hole portions are formed circumferentially around the smooth through-hole. The axial directions of the smooth through-hole and the through-hole portions are both along the left-right direction. A pair of flanges are provided on the left end side of the body of the pressing head, and these flanges are positioned on the left port side of the cavity and arranged opposite each other. The rollers are each disposed between the two opposing flanges.

[0017] The elastic push assembly includes a drive rod, a spring, and a helical ring. The drive rod includes an end block and a screw body that are detachably connected, as well as a spring-shaped sleeve. A smooth column section is formed at the free end of the screw body, and the spring-shaped sleeve is fitted at the root of the screw body. The outer diameter of the end block is larger than the outer diameter of the screw body and also larger than the outer diameter of the spring-shaped sleeve.

[0018] The smooth column section can pass through the smooth through hole and extend into the cavity of the connecting sleeve, aligning the root of the screw body with the smooth through hole. The end block remains in the cavity, and the two ends of the spring-shaped sleeve contact the right end face of the end block and the bottom surface of the cavity, respectively. The spring is fitted onto the screw body, with one end contacting the right end face of the pressure head and the other end matching the left end face of the screw ring mounted on the screw body. Tightening the screw ring adjusts the spring compression. Multiple guide rods corresponding to the through hole are fixed on the end block. The axial direction of the guide rods is along the left-right direction. After passing through the through hole to the right, the guide rods are fixed to the connecting sleeve.

[0019] Optionally, multiple recessed holes are provided around the circumference on the outer peripheral surface of the spiral ring, and the recessed holes are formed into prismatic countersunk holes.

[0020] Optionally, an internally threaded countersunk hole is formed at the end of the connecting sleeve facing the spherical body. A cylindrical portion is formed at the end of the counterweight facing the spherical body, and the inner wall of the cylindrical portion is an internally threaded surface.

[0021] Two axial flanges are formed on the spherical body, arranged opposite each other, and the outer circumferential surfaces of the two axial flanges are both externally threaded surfaces. The internally threaded countersunk holes and internally threaded surfaces correspond to and match the axial flanges on the left and right sides of the spherical body, respectively, and the connecting sleeve and the balance block are fixedly connected to the left and right sides of the spherical body.

[0022] Optionally, linear grooves with arc / arched inner bottom surfaces are formed on the upper and lower surfaces of the elastic plate, respectively, and both linear grooves extend in the front-rear direction. Simultaneously, the linear grooves distributed on the upper surface and the linear grooves distributed on the lower surface are staggered in the left-right direction. Sensing elements are evenly distributed on the inner bottom surface of each linear groove, and each sensing element is connected to the sensor body in the sensing unit. The sensing element can be selected as a strain gauge.

[0023] Optionally, a stopper is fixedly disposed in a shaped hole in the sidewall. A spherical groove is formed on the inner wall of the stopper, and a plurality of balls are distributed on the bottom surface of the spherical groove. The spherical part of the sphere can contact the balls.

[0024] Optionally, an annular flange one is formed on the left end face of the side wall of the housing. An annular flange two is formed on the right end of the pressing head. A connecting sleeve is provided between annular flange one and annular flange two. The wall of the connecting sleeve is a flexible and thin wall, with a wall thickness not exceeding 2mm. The connecting sleeve can seal the elastic pressing component and the connecting sleeve inside its cavity, thus providing a dustproof function.

[0025] The elevator status early warning method includes the following steps: monitoring the vibration state of the elastic plate and converting it into a real-time vibration signal; comparing the vibration frequency and / or amplitude of the vibration signal with preset vibration frequency early warning thresholds and amplitude early warning thresholds respectively to determine whether to issue an early warning signal.

[0026] The elevator status early warning method includes the following steps: monitoring the vibration state of the elastic plate and converting it into real-time speed and acceleration signals; comparing the speed signals and / or acceleration signals with preset speed early warning thresholds and acceleration early warning thresholds respectively to determine whether to issue an early warning signal.

[0027] The beneficial effects of this invention are as follows: The elevator status early warning device and method provided by this invention can monitor the operating status of the elevator and provide timely warnings when the elevator's verticality deteriorates to a certain extent, thus helping to reduce the probability of elevator safety accidents caused by poor elevator verticality. Specifically, this invention can monitor the elevator status by utilizing the change in the degree of vertical vibration caused by changes in the vertical matching state between the car and the rails. It can issue timely warnings before the elevator's verticality deteriorates to a certain extent and excessively affects the safe operation of the elevator, thereby helping to suppress accidents and reducing the probability of safety accidents. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the arrangement of this application with the car and rails.

[0029] Figure 2 This is a cross-sectional structural diagram showing the assembly of this application with the car and rails.

[0030] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0031] Figure 4 This is a cross-sectional structural diagram of the present application in its split state.

[0032] Figure 5This is a schematic diagram of the right-side structure of the pressure head.

[0033] Figure 6 This is a schematic diagram of the main view section structure of the pressure head.

[0034] Figure 7 This is a schematic diagram of the left-side structure of the pressure head.

[0035] Figure 8 This is a schematic diagram of the main view section structure of the transmission rod.

[0036] Figure 9 This is a schematic diagram of the transmission rod from the left.

[0037] Figure 10 This is a schematic diagram of a locally optimized structure for matching the spherical body with its sidewalls.

[0038] In the diagram: 10. Box base; 11. Side wall; 111. Hole; 112. Annular flange one; 12. Plug; 121. Spherical groove; 122. Ball bearing; 13. Cover plate; 20. Pressing head; 21. Flange arm; 211. First roller shaft; 22. Second roller shaft; 23. Cavity; 231. Through hole one; 24. Flange body; 241. Smooth through hole one; 25. Annular flange two; 30. Elastic pushing assembly; 31. Transmission rod; 311. End block; 3111. Guide rod; 3112. Through hole two; 312. Screw body; 3121. Smooth... Column segment, 313 spring-shaped sleeve, 32 spring, 33 threaded ring, 331 concave hole; 40 connecting sleeve, 41 smooth through hole two, 42 internal thread countersunk hole, 43 flange; 50 spherical body, 51 spherical part; 60 counterweight, 61 cylindrical part, 611 internal threaded surface; 70 disturbance assembly, 71 elastic plate, 72 counterweight; 80 sensing unit, 81 strain gauge part; 90 connecting sleeve; 100 car; 200 rail, 201 head, 2011 end face; 300 detection assembly. Detailed Implementation

[0039] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "front," "rear," and "middle" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0040] The rail 200 involved in this application is a conventional rail structure, that is, the cross-sectional shape of the rail 200 adopts an I-shaped cross-section with optimal bending resistance, and consists of three parts: rail head, rail web, and rail base. Therefore, the detailed structural form of the rail 200 will not be described in detail. The rail base of the rail 200 is fixedly connected to the wall of the elevator shaft, and the rail web extends beyond the inner side of the shaft, so that the end face 2011 of the rail head (i.e., head 201) is relatively parallel to the inner wall of the shaft.

[0041] like Figures 1 to 10 The elevator status early warning device shown includes a detection assembly 300 fixed to the top of the car 100 and matched with the head 201 of the rail 200. Specifically, the detection assembly 300 is brought into contact with the end face 2011 of the head 201.

[0042] The detection assembly 300 includes a housing 10 fixedly connected to the top wall of the car 100, and a pressing head 20, an elastic pushing assembly 30, a connecting sleeve 40, a spherical body 50, a balance block 60, two disturbance assemblies 70 and a sensing unit 80 disposed on the housing 10.

[0043] A shaped hole 111 is formed on the side wall 11 of the housing 10 near the rail 200 (i.e., the left side). The axis of the shaped hole 111 extends in the left-right direction. A spherical groove 121 is formed on the inner wall of the shaped hole 111, which matches the spherical surface 51 of the spherical body 50, allowing the spherical body 50 to rotate in space relative to the side wall 11 about an axis that extends approximately in the left-right direction. At that time, the spherical body 50 can rotate up and down and back and forth relative to the side wall 11 in the vertical direction and in the front-back direction.

[0044] A pair of first rollers 211 and a second roller 22 are pivotally arranged on the left end face of the pressing head 20. The second roller 22 is positioned between the two first rollers 211, and the outer diameter of the first rollers 211 is smaller than the outer diameter of the second roller 22. The axial directions of the first rollers 211 and the second roller 22 are both perpendicular to the extending direction of the rail 200 (which extends vertically), and (in the initial state) the outer circumferential surfaces of each roller can simultaneously make tangential contact with the end face 2011 on the head 201. See also Figure 1 , Figure 2 As shown, the rail 100 extends in the vertical direction as shown in the figure, and the axial direction of each roller extends in the front-back direction as shown in the figure. The left end face of the pressing head 20 is opposite to the end face 2011 on the rail 200.

[0045] The pressing head 20 and the connecting sleeve 40 are respectively connected to the left and right ends of the elastic pressing assembly 30.

[0046] The elastic pushing component 30 is matched with the pressing head 20 through a slide structure arranged in the left and right direction, and the elastic pushing component 30 can apply an elastic force in the left and right direction to the pressing head 20, so that each roller shaft 22 can keep in contact with the end face 2011.

[0047] The connecting sleeve 40 can support the elastic pushing assembly 30 to extend approximately in the left-right direction.

[0048] The connecting sleeve 40 and the balance block 60 are respectively connected to the left and right ends of the spherical body 50.

[0049] In the above structure, the pressing head 20, the elastic pushing assembly 30, and the connecting sleeve 40 are located opposite each other on the left side of the spherical body 50, and the balance block 60 is located opposite each other on the right side of the spherical body 50. When the housing 10 is a box structure with four walls, that is, the pressing head 20, the elastic pushing assembly 30, and the connecting sleeve 40 are located opposite each other on the outside of the housing 10, and the balance block 60 is located opposite each other on the inside of the housing 10. Therefore, the disturbance assembly 70 provided on the balance block 60 and the sensing unit 80 can be sealed inside the housing 10 to prevent dust accumulation.

[0050] The balance block 60 and the spherical body 50 are matched by a threaded structure, allowing adjustment of the lateral distance between them. In the initial state, by adjusting the lateral distance between the balance block 60 and the spherical body 50, the pressing head 20 and the balance block 60 can be kept in balance relative to each other in the plane, and the outer peripheral surfaces of each roller shaft can simultaneously maintain contact with the end face 2011.

[0051] The disturbance component 70 includes an elastic plate 71 and a counterweight 72 disposed at one end of the elastic plate 71. The counterweight 72, placed at the free end of the elastic plate 71, helps to amplify (make more pronounced) the mechanical vibration transmitted to the elastic plate 71, resulting in increased elastic deformation of the elastic plate 71 (both vibration frequency and amplitude are enhanced and easily detected), thus promoting amplification and ensuring good monitoring sensitivity.

[0052] The sensing unit 80 includes a sensor body and a sensing element connected together, and the sensor body is fixed on the housing 10. The sensor body contains a processing module / processor.

[0053] like Figures 2 to 4The illustrated scheme includes two disturbance components 70, which are respectively connected to two sensor bodies in the sensing unit 80. The two sensor bodies then process the sensing signals they receive. The installation positions of the two disturbance components 70 are described below.

[0054] One end of the elastic plate 71 in the disturbance component 70 is fixed to the right end face of the balance block 60, so that the elastic plate 71 extends in the plane and can generate elastic deformation in the vertical direction. At the same time, the sensing element is fixed to the elastic plate 71 and can generate physical quantity changes with the elastic deformation (in the vertical direction) of the elastic plate 71, so that the sensor body generates a real-time sensing signal.

[0055] Another end of the elastic plate 71 in the other disturbance component 70 is fixed to the side wall of the balance block 60, allowing the elastic plate 71 to extend in a vertical plane and elastically deform in the left-right direction. Simultaneously, a sensing element is fixed to the elastic plate 71 and undergoes physical quantity changes in response to the elastic deformation (in the left-right direction), causing the sensor body to generate a real-time sensing signal. The processor in the sensing unit 80 processes the sensing signal and determines whether to issue a warning. It is important to emphasize that each sensing element in a different disturbance component 70 corresponds to a separate sensor body. Therefore, the physical quantity changes of the sensing elements in different disturbance components 70 generate individual sensing signals and are processed.

[0056] To ensure a good vertical alignment between the car 100 and the rail 200, and to guarantee that the three rollers on the pressure head 20 maintain stable contact with the end face 2011, the dynamic balance of the left and right extensions (formed by the elastic pushing assembly 30, the connecting sleeve 40, the spherical body 50, and the balance block 60) centered on the spherical body 50 is maintained in a more stable state. This ultimately allows the elastic deformation of the elastic plate 71 to become more stable and less volatile. Furthermore, by maintaining a stable and smooth vibration frequency and amplitude, the warning signal can be better identified and captured when the vertical alignment deteriorates, making the warning signal more prominent. The following modification can be made: sleeves are fitted onto the pivot sections at both ends of the two rollers (i.e., the two first rollers 211) located on the upper and lower sides, and an elastic layer is fixedly provided on the outer wall / circumferential surface of the sleeves. The outer peripheral surface of the elastic layer contacts the inner wall of the (assembly) shaft hole provided on the pressure head 20, allowing the first roller shaft 211 to move radially (including left and right) relative to the pressure head 20. The magnitude of this (left and right) movement depends on the thickness of the elastic layer. Both ends of the first roller shaft 211 are matched with the pressure head 20 via the sleeve, enabling the first roller shaft 211 to rotate relative to the pressure head 20 while also having the ability to move / stir radially.

[0057] Under the limitations of the preceding technical description, when the elastic pushing assembly 30 is not pushing the pressing head 20 towards the head 201 end face 2011 of the rail 200, i.e., in the original state, the exposed outer peripheral surfaces (i.e., the left ends of the outer peripheral surfaces) of the two rollers (i.e., the two first rollers 211) located at the upper and lower positions are in the same vertical plane, and this vertical plane is further away from the pressing head 20 than the vertical plane of the exposed outer peripheral surface (i.e., the left end of the outer peripheral surface) of the roller (i.e., the second roller 22) located in the central position. That is, the left end of the outer peripheral surface of the first roller 211 is further to the left than the left end of the outer peripheral surface of the second roller 22. At the same time, it is beneficial to make the outer diameter of the roller (i.e., the first roller 211) located at the upper and lower positions smaller than the outer diameter of the roller (i.e., the second roller 22) located in the central position. The left ends of the outer peripheral surfaces of the two first rollers 211 are in the same vertical plane, and the left end of the outer peripheral surface of the second roller is in another vertical plane, and the two vertical planes are relatively parallel.

[0058] After the detection assembly 300 is fixedly mounted on the car 100, the elastic pushing component 30 is adjusted to push the pressing head 20 to the left. Initially, the outer peripheral surface of the first roller 211 contacts the end face 2011 of the head 201. As the pressing head 20 gradually moves to the left, the thrust of the elastic pushing component 30 on the pressing head 20 gradually increases, and can develop to the point that it pushes the pressing head 20 to the point that the elastic layer disposed on the pivot of the first roller 211 undergoes elastic deformation, thereby changing the left and right position of the first roller 211. Finally, the outer peripheral surface of the second roller 22 contacts the end face 2011. At that time, the outer peripheral surfaces (left ends) of all three rollers are tangentially in contact with the end face 2011 on the head 201 of the rail 200. The stroke of the first roller 211 relative to the left end of the pressing head 20 should be controlled within 6 mm, preferably not exceeding 4 mm (inclusive).

[0059] In the above scheme, when the verticality matching between the car 100 and the rail 200 is good, the outer peripheral surfaces of the two first roller shafts 211 and the outer peripheral surfaces of the second roller shaft 22 can be kept in approximately tangential contact with the end face 2011 of the head 201 of the rail 200. Under the action of the frictional force of the direct contact between the roller shaft and the rail 200, the left and right extensions formed by the elastic pushing component 30, the connecting sleeve 40, the spherical body 50 and the balance block 60 can generate a relatively small reciprocating swing motion with the hinge surface between the spherical body 50 and the side wall 11 as the rotational contact surface. The elastic pushing assembly 30 applies a leftward pushing force to the pressing head 20, ensuring that the perpendicularity between the car 100 and the rail 200 is maintained in a good state. The contact state between the three rollers and the end face 2011 exhibits only minor differences, and the consistency of the contact force at the three positions is not significantly different. This allows the dynamic balance of the spherical body 50 (the left and right side mechanisms) relative to the side wall 11 to remain relatively stable. During this period, the fluctuations in the elastic deformation of the elastic plate 71 caused by mechanical vibration (in the vertical direction) are not significant. This means that the frequency and amplitude signals fed back by the sensing unit 80 remain relatively stable and change gradually, making sudden changes less likely. As the perpendicularity between the car 100 and the rail 200 gradually deteriorates, until it reaches a point of excessive perpendicularity, the previously stable and gentle vibration state (vibration state of the disturbance component 70) will be disrupted. This will lead to an increase in the relative differences in the contact state between the three rollers and the end face 2011, resulting in a decrease in the consistency of the force on the contact surfaces of each roller and the end face 2011, and significant fluctuations. There may even be a cyclical situation where only two or one roller is in contact with the end face 2011, which can easily cause the previously stable dynamic balance to be broken instantaneously. At that time, the elastic deformation of the elastic plate 71 in the vertical direction will exhibit significant fluctuations and drastic changes, with numerous and large instantaneous abrupt changes. That is, the vibration frequency and amplitude signals fed back by the sensing unit 80 will both undergo significant and sudden changes and become more irregular. When the fed-back vibration frequency and / or amplitude exceed the set warning threshold, the sensing unit 80 will issue an alarm.

[0060] To achieve the relevant guiding and force-applying functions, and to make the connection structure between the elastic pushing assembly 30 and the pressing head 20 compact. For example... Figures 2 to 7As shown, a cavity 23 is formed on the body of the pressing head 20. A smooth through-hole 241 is formed at the center / axis on the inner bottom surface of the cavity 23, and multiple through-hole portions 231 are formed circumferentially around the smooth through-hole 241. The axial directions of the smooth through-hole 241 and the through-hole portions 231 are both along the left-right direction. Specifically, a flange 24 is formed on the right end face of the body of the pressing head 20, allowing all or most of the smooth through-hole 241 to be formed on the flange 24. The flange 24 is annular. A pair of flange arms 21 are provided on the left end face of the body of the pressing head 20, and these flange arms 21 are correspondingly located on the left port side of the cavity 23, arranged opposite each other. The first roller 211 and the second roller 22 are both pivotally located between two opposite flanges 21, meaning that the flanges 21 have mounting shaft holes that correspond to the two ends of the rollers. The elastic pushing assembly 30 includes a transmission rod 31, a spring 32, and a helical ring 33.

[0061] The transmission rod 31 includes an end block 311 and a screw body 312 detachably connected together, as well as a spring-shaped sleeve 313. A cylindrical section 3121 is formed at the free end of the screw body 312. The outer diameter of the end block 311 is larger than the outer diameter of the spring-shaped sleeve 313, and also larger than the outer diameter of the screw body 312. The spring-shaped sleeve 313 can undergo axial expansion and contraction.

[0062] The light column segment 3121 can pass through the smooth through hole 241 and extend into the cavity of the connecting sleeve 40, so that the root of the screw body 312 corresponds and matches the smooth through hole 241. The end block 311 is placed in the cavity 23. The two ends of the spring-shaped sleeve 313 are in contact with the right end face of the end block 311 and the inner bottom surface of the cavity 23, respectively. Thus, the spring-shaped sleeve 313 can form a support gap between the opposite surfaces of the end block 311 and the cavity 23, and this support gap (left-right gap) can change with the elastic expansion and contraction deformation of the spring-shaped sleeve 313.

[0063] The section at the root of the screw body 312 that corresponds to and matches the smooth through hole 241 can be formed into a cylindrical section, and the outer diameter of the cylindrical section is consistent with the inner diameter of the smooth through hole 241, so that the screw body 312 can play a supporting role while also playing a guiding role in the left and right movement of the pressing head 20.

[0064] The spring 32 is fitted onto the screw body 312, with one end / left end of the spring 32 contacting the right end face of the body of the pressure head 20 (i.e., contacting the right end face of the flange 24), and the other end / right end matching the left end face of the ring body 33 disposed on the screw body 312. A countersunk hole is formed on the left end face of the ring body 33, allowing the right end of the spring 32 to extend into the countersunk hole and contact the inner bottom surface of the countersunk hole.

[0065] Multiple guide rods 3111, corresponding to the through holes 231, are fixedly provided on the end block 311. After passing through the through holes 231 to the right, the guide rods 3111 are fixed to the flange 43 on the connecting sleeve 40 (so that the right end of each guide rod 3111 is fixed). Multiple smooth through holes 41 are arranged alternately around the circumference of the flange 43. Simultaneously, an external thread section is formed at the right end of each guide rod 3111, allowing the thread section to pass through the smooth through holes 41. Nuts are respectively placed on the thread section corresponding to the left and right sides of the flange 43 to fix the right end of the guide rod 3111 to the connecting sleeve 40. The inner wall of the through hole 231 is a smooth cylindrical surface, and the outer diameter of the guide rod 3111 is the same as the inner diameter of the through hole 231, thus supporting and guiding the movement of the pressure head 20.

[0066] The end block 311 may be a disc, and through holes 3112 corresponding to the guide rods 3111 are distributed on the end block 311. The inner wall of the through hole 3112 is a threaded surface, and it can be fixedly connected to the guide rods 3111 by a threaded structure. A protrusion is formed at the right end of the end block 311, and the outer wall of the protrusion is an external threaded surface, which matches and connects with the threaded countersunk hole at the left end of the screw body 312.

[0067] The elastic pressure generated when the spring 32 is compressed to a certain extent causes the spring-shaped sleeve 313 to undergo elastic deformation, reducing the axial length of the spring-shaped sleeve 313, thereby achieving the purpose of adjusting the position of the pressure head 20 relative to the housing 10 in the left-right direction. It can be seen that the axial depth of the cavity 23 is greater than the axial thickness of the end block 311 (the main body portion, i.e., the portion remaining in the cavity 23).

[0068] On the connecting sleeve 40, an internally threaded countersunk hole 42 is formed at one end (right end) facing the spherical body 50. On the balance block 60, a cylindrical portion 61 is formed at one end (left end) facing the spherical body 50, and the inner wall of the cylindrical portion 61 is formed as an internally threaded surface 611.

[0069] Two axial flanges are formed on the spherical body 50, arranged opposite each other, and the outer peripheral surfaces of the two axial flanges are both external threaded surfaces. The internal thread countersunk hole 42 and the internal threaded surface 611 correspond to and match the axial flanges on the left and right sides of the spherical body 50, respectively, and the connecting sleeve 40 and the balance block 60 are fixedly connected to the left and right sides of the spherical body 50.

[0070] After assembly, to facilitate the use of tools to screw the screw ring 33 and adjust its left and right position relative to the screw body 312, i.e., to adjust the degree of compression of the spring 32, multiple recessed holes 331 are formed on the outer circumferential surface of the screw ring 33, distributed in a circumferential direction, and the recessed holes 331 are formed as prism-shaped countersunk holes.

[0071] A cover plate 13 is provided at the upper end of the housing 10, which can be opened to install and adjust the position of the balance block 60 and to assemble and adjust the disturbance component 70.

[0072] like Figure 2 , Figure 4 As shown, linear grooves with concave inner bottom surfaces (arc / arched surfaces) are formed on the upper and lower end surfaces of the elastic plate 71, respectively, and both linear grooves extend in the front-to-back direction. In a top view, the linear grooves distributed on the upper end surface and the linear grooves distributed on the lower end surface are staggered in the left-to-right direction, allowing the opposite ends of the two linear grooves to partially intersect or not intersect at all. Sensing elements are evenly distributed on the inner bottom surface of each linear groove, and each sensing element is connected to the sensor body in the sensing unit 80. The sensing element is a strain gauge portion 81.

[0073] An annular flange 112 is formed on the left end face of the side wall 11 of the housing 10. An annular flange 25 is formed on the right end of the pressing head 20. A connecting sleeve 90 is provided between the annular flange 112 and the annular flange 25. The wall of the connecting sleeve 90 is a flexible wall, and the connecting sleeve 90 can seal the elastic pushing assembly 30 and the connecting sleeve 40 in its cavity, thus playing a dustproof role. In addition, the spring-shaped sleeve can seal the port of the smooth through hole 241 at the bottom surface of the cavity 23, and together with the connecting sleeve 90, they can form a good sealing mechanism, which can effectively prevent dust from adversely affecting the effective operation of the present application.

[0074] The wall thickness of the connecting sleeve 90 should be no more than 2 mm, and the wall should be made of a soft material to form a soft wall, so that the setting of the connecting sleeve 90 will not significantly interfere with the disturbance of the spherical body 50 relative to the side wall 11, that is, to minimize the possible interference.

[0075] A plug cylinder 12 is fixedly installed in the shaped hole 111 of the side wall 11. A spherical groove 121 is formed on the inner wall of the plug cylinder 12, and a plurality of balls 122 are distributed on the inner bottom surface of the spherical groove 121. This allows the spherical part 51 of the spherical body 50 to contact the balls 122.

[0076] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Many aspects of the present invention can be improved without departing from the overall concept. Those skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An elevator status early warning device, characterized in that: It includes a car seat (10) fixedly connected to the car (100), and a pressing head (20), a spring-loaded pressing assembly (30), a connecting sleeve (40), a spherical body (50), a counterweight (60), at least one disturbance assembly (70) and a sensing unit (80) disposed on the car seat (10). A shaped hole (111) is formed on the side wall (11) of the box base (10) near the rail (200), and a spherical groove (121) is formed on the inner wall of the shaped hole (111) to match the spherical surface (51) of the spherical body (50), so that the spherical body (50) can rotate relative to the side wall (11). Three rollers are pivotally arranged on the left end face of the pressure head (20), with alternating upper and lower rollers; the axial direction of each roller is perpendicular to the extension direction of the rail (200), and the outer circumferential surface can simultaneously contact the end face (2011) on the head (201). The elastic pushing assembly (30) is connected between one end of the pressing head (20) and the connecting sleeve (40), and can guide the pressing head (20) to move in the left and right direction and apply a pushing force in the left and right direction to the pressing head (20); The other end of the connecting sleeve (40) is connected to one end of the spherical body (50), which can support the elastic pushing assembly (30) to extend in the left and right directions; the other end of the spherical body (50) is matched with the balance block (60) through a threaded structure; The disturbance component (70) includes an elastic plate (71) with a counterweight (72) at one end; the other end of the elastic plate (71) is fixed to the balance block (60) and extends in the plane, and can generate elastic deformation in the vertical direction; The sensing unit (80) includes a sensor body and a sensing element connected together; the sensor body is fixed on the housing (10); the sensing element is fixed on the elastic plate (71) and can generate physical quantity changes with the elastic deformation of the elastic plate (71), so that the sensor body generates a sensing signal; the sensing unit (80) can process the sensing signal and make a judgment on whether to issue a warning.

2. The elevator status early warning device according to claim 1, characterized in that: Sleeves are fitted on the pivot sections at both ends of the two rollers located at the upper and lower sides, and an elastic layer is fixed on the outer wall of the sleeve; the elastic layer contacts the inner wall of the mounting shaft hole on the pressing head (20), so that the rollers located at the upper and lower sides can move relative to the pressing head (20) in the left and right directions. The exposed outer peripheral ends of the two rollers located at the upper and lower positions can be in the same vertical plane, and the vertical plane can be away from the pressure head (20) relative to the vertical plane of the exposed outer peripheral end of the roller located at the middle position.

3. The elevator status early warning device according to claim 2, characterized in that: The outer diameter of the rollers located on the upper and lower sides is smaller than the outer diameter of the rollers located in the center position.

4. The elevator status early warning device according to claim 1, characterized in that: A cavity (23) is formed on the body of the pressing head (20), and a smooth through hole (241) is formed on the bottom surface of the cavity (23), and multiple through holes (231) are formed around the smooth through hole (241); the elastic pushing assembly (30) includes a transmission rod (31), a spring (32) and a screw ring (33); the transmission rod (31) includes a connected end block (311) and a screw body (312), and a spring-shaped sleeve (33); a smooth column section (3121) is formed at the free end of the screw body (312); the spring-shaped sleeve (33) is fitted at the root of the screw body (312); the smooth column section (3121) can pass through the smooth through hole (241) and extend into the connecting sleeve. In the cavity of (40), the root of the screw body (312) is matched with the smooth through hole (241), the end block (311) is placed in the cavity (23), and the two ends of the spring-shaped sleeve (33) are in contact with the end face of the end block (311) and the bottom surface of the cavity (23); the spring (32) is fitted on the screw body (312), one end is in contact with the right end face of the pressing head (20), and the other end is matched with the left end face of the ring body (33) arranged on the screw body (312); multiple guide rods (3111) are fixedly provided on the end block (311) and matched one-to-one with the through hole (231); after the guide rod (3111) passes through the through hole (231) to the right, it is fixedly connected to the connecting sleeve (40).

5. The elevator status early warning device according to claim 4, characterized in that: On the outer circumferential surface of the spiral ring (33), multiple recesses (331) are formed in a circumferential direction, and the recesses (331) are formed as prismatic countersunk holes.

6. The elevator status early warning device according to claim 1, characterized in that: On the connecting sleeve (40), an internally threaded countersunk hole (42) is formed at one end facing the spherical body (50); on the balance block (60), a cylindrical part (61) is formed at one end facing the spherical body (50), and the inner wall of the cylindrical part (61) is an internally threaded surface (611). Two axial flanges are formed on the spherical body (50) and arranged opposite to each other. The outer peripheral surfaces of the two axial flanges are both external threaded surfaces. The internal thread countersunk hole (42) and the internal threaded surface (611) are matched with the axial flanges on both sides of the spherical body (50) respectively, and the connecting sleeve (40) and the balance block (60) are fixedly connected to the left and right sides of the spherical body (50).

7. The elevator status early warning device according to claim 1, characterized in that: Linear grooves with concave inner bottom surfaces are formed on the upper and lower surfaces of the elastic plate (71), and both linear grooves extend in the front-back direction; the linear grooves distributed on the upper surface and the linear grooves distributed on the lower surface are staggered in the left-right direction. Sensing elements are evenly distributed on the inner bottom surface of each linear groove, and each sensing element is connected to the sensor body in the sensing unit (80).

8. The elevator status early warning device according to claim 1 or 7, characterized in that: The sensitive component is the strain gauge section (81).

9. The elevator status early warning device according to claim 1, characterized in that: A plug cylinder (12) is fixedly installed in the shaped hole (111) of the side wall (11); a spherical groove (121) is formed on the inner wall of the plug cylinder (12); a plurality of balls (122) are distributed on the inner bottom surface of the spherical groove (121); the spherical surface (51) can contact and match the balls (122).

10. An elevator status early warning method based on the elevator status early warning device according to claim 1, characterized in that, The process includes the following steps: monitoring the vibration state of the elastic plate (71) and converting it into a real-time vibration signal; comparing the vibration frequency and amplitude of the vibration signal with the preset vibration frequency warning threshold and amplitude warning threshold respectively to determine whether to issue a warning signal.

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