Static braking torque monitoring system for in-use elevator

Abstract

The invention relates to the technical field of elevator detection, in particular to an in-use elevator static braking torque monitoring system which is used for monitoring a braking spring of an elevator drum brake and comprises a center shaft foundation, an outer driving ring, a contact lantern ring, an inner combiner, a jacking assembly and a pressure sensor. The monitoring system is compact in structure, a traditional screw used for penetrating through a brake spring is replaced in a normal state, monitoring can be rapidly carried out when the elastic force of the spring needs to be monitored, and the brake torque can be conveniently obtained in the follow-up process. The monitoring system is easy to operate, and switching between a normal state mode and a monitoring mode can be achieved only through conventional torsion operation. In a normal mode, a double-thread screw in the prior art can be replaced to place a brake spring; in the monitoring mode, the elastic force of the spring can be directly obtained through two times of rotation operation, so that the braking torque can be obtained subsequently.

Description

TECHNICAL FIELD

[0001] The application relates to the elevator monitoring technical field, in particular to a static braking torque monitoring system of an in-use elevator. BACKGROUND

[0002] The elevator drum brake is a key component for ensuring safe operation of the elevator, and the basic structure mainly comprises a rack, a brake drum (also referred to as a brake wheel), a brake arm, a brake spring and an electromagnet. The brake spring is usually arranged on the drum brake through a double-thread screw rod, the small thread of the double-thread screw rod penetrates through the brake arm and is fixed with the rack, then the brake spring is arranged outside the brake arm, and the nut is screwed on the large thread of the double-thread screw rod and presses the brake spring, so that the elastic force of the brake spring drives the brake arm to swing inward and press the brake wheel.

[0003] The prior art lacks a detection mechanism for monitoring the brake spring based on the above technical scheme, and therefore a monitoring system needs to be designed to further monitor the braking torque by monitoring the elastic force of the brake spring. SUMMARY

[0004] A static braking torque monitoring system of an in-use elevator is used to monitor the brake spring of the elevator drum brake, and comprises a middle shaft base, an outer driving ring, a contact sleeve ring, an inner coupler, a top pressing assembly and a pressure sensor. The middle shaft base comprises a thin shaft part and a thick shaft part. The thin shaft part comprises a thin threaded rod, a first outer hexagon arranged on the left side of the outer wall of the thin threaded rod, an adjusting channel arranged in the thin threaded rod, an adjusting column arranged on the right half of the outer wall of the thin threaded rod, an annular groove arranged on the outer wall of the adjusting column, and adjusting side holes circumferentially and uniformly arranged on the annular groove and communicated with the adjusting channel. Each adjusting side hole is provided with a planetary gear shaft in the axial direction. The thick shaft part comprises a thick threaded rod arranged at the right end of the thin threaded rod, a rod inner cavity arranged in the thick threaded rod and communicated with the adjusting channel, a limiting inner ring arranged on the inner wall of the adjusting rod inner cavity, a rotation-stopping key arranged on the inner wall of the limiting inner ring, an adjusting opening arranged on the right side of the rod inner cavity, and circular cavity side holes circumferentially and uniformly arranged on the left side of the rod inner cavity.

[0005] The outer driving ring comprises an outer threaded ring screwed on the thick threaded rod, a second outer hexagon formed on the right side of the outer threaded ring, and a containing ring groove formed on the left side of the inner wall of the outer threaded ring.

[0006] The contact sleeve ring comprises a sleeve ring body inserted into the containing ring groove, a contact circular ring formed on the inner wall of the sleeve ring body, and an abutting end ring arranged on the left side of the sleeve ring body. The axial length of the contact circular ring is greater than the axial length of the containing ring groove.

[0007] The inner coupling device is arranged in the middle shaft base, and the inner coupling device is in transmission connection with the contact ring in the stretched state; the inner coupling device comprises a coupling base, a driving component, a radial displacement component and a torsion component; The coupling base comprises a coupling cylinder arranged in the inner cavity of the rod in a slidable manner, a plurality of through holes arranged on the outer wall of the coupling cylinder in a circumferentially uniform manner and penetrating the side hole and the coupling cylinder, a right stop ring arranged in the right half part of the through hole, a left stop ring arranged on the left end surface of the through hole, a plurality of through side holes arranged on the outer periphery of the through hole in a circumferentially uniform manner, and an axial narrow hole arranged on the left side of the through side hole. The driving component comprises a driving screw rod arranged through the right stop ring and the left stop ring, a right stop disc arranged on the right end of the driving screw rod, a left driving rod arranged on the left side of the driving screw rod, a driven gear arranged on the left end of the left driving rod, a driven screw pipe screwed on the outer wall of the driving screw rod, a plurality of driving side arms arranged on the outer wall of the driven screw pipe in a circumferentially uniform manner and corresponding to the through side hole, and a driving inclined slot arranged on the driving side arm. The radial displacement component comprises a radial displacement plug rod in one-to-one plug-in cooperation with the through side hole, a containing recess arranged on the lower end of the radial displacement plug rod and containing the driving side arm passing through, a driven plug arranged in the containing recess and cooperating with the driving inclined slot. The torsion component comprises a plurality of planetary gears corresponding to the planetary wheel shaft and meshing with the driven gear, and an outer peripheral gear meshing on the outer periphery of the planetary gear.

[0008] As a further embodiment, the front and rear of the through side hole are respectively provided with a radial guide sliding groove, and the front and end surface of the radial displacement plug rod are respectively provided with a guide plug strip cooperating with the guide sliding groove.

[0009] The top pressing component is arranged in the inner cavity of the rod, and is used to drive the inner coupling device to move to the left; the top pressing component comprises an inner threaded pipe arranged on the right end of the inner cavity of the rod in a rotatable manner, a top pressing screw rod screwed in the inner threaded pipe, and a rotation stopping insertion slot arranged on the top pressing screw rod and in plug-in cooperation with the rotation stopping insertion key.

[0010] The pressure sensor is arranged inside the inner cavity of the rod and located at the right side of the top pressing component.

[0011] The drum brake at least comprises a rack, a brake wheel, a brake arm, an electromagnet and a brake spring, one end of the brake spring abuts against the brake arm, and the other end abuts against the contact ring.

[0012] The pressure sensor is a disc type pressure sensor, and the pressure sensor is connected with a control unit and a display device.

[0013] The beneficial effects of the present application are as follows: The monitoring system described in this invention has a compact structure. Under normal conditions, it replaces the traditional screw used to thread the brake spring. When it is necessary to monitor the spring force, it can also be monitored quickly, which facilitates the subsequent acquisition of the braking torque.

[0014] The monitoring system described in this invention is simple to operate; switching between normal mode and monitoring mode can be achieved simply by performing a routine torsion operation. In normal mode, the brake spring is placed on the outer periphery of the central shaft base and abuts against the left side of the contact collar. The central shaft base passes through the brake arm and is screwed to the side of the frame through a fine threaded rod. The outer drive ring is rotated to the left and the contact collar slides to the left. The contact collar presses the brake spring, and the brake spring gives the brake arm a leftward elastic force, thereby achieving braking.

[0015] In monitoring mode, rotating the outer peripheral gear enables the transmission connection between the inner coupling and the contact collar. Then, rotating the internal threaded tube drives the inner coupling and the contact collar to move slightly, so that the compressive stress of the brake spring on the contact collar is transmitted to the pressure sensor through the inner coupling and the top pressure assembly, and thus the elastic force of the brake spring can be directly obtained. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of one embodiment of the drum brake.

[0018] Figure 2 This is a cross-sectional view of one embodiment of the monitoring system.

[0019] Figure 3 This is a partial cross-sectional view of the monitoring system in its first state.

[0020] Figure 4 This is a partial cross-sectional view of the monitoring system in its first state.

[0021] Figure 5 This is a partial cross-sectional view of the monitoring system in its first state.

[0022] Figure 6 This is a cross-sectional view of one embodiment of the central axis foundation.

[0023] Figure 7 This is a cross-sectional view of the outer drive ring and the contact collar.

[0024] Figure 8 This is a cross-sectional view of one embodiment of the inner connector.

[0025] Figure 9 This is a cross-sectional view of one embodiment of the aforementioned foundation.

[0026] Figure 10 This is a schematic diagram of one embodiment of the aforementioned combination basis.

[0027] Figure 11 This is an isometric sectional view of one embodiment of the aforementioned foundation.

[0028] The numbers in the diagram are as follows: 1. Central axis foundation; 11. Thin shaft section; 111. Fine threaded rod; 112. First external hexagon; 113. Adjustment channel; 114. Adjustment column; 115. Annular groove; 116. Adjustment side hole; 117. Planetary gear shaft; 12. Coarse shaft section; 121. Coarse threaded rod; 122. Inner cavity of the rod; 123. Limiting inner ring; 124. Anti-rotation key; 125. Adjustment opening; 126. Side hole of the cavity. 2. External drive ring; 21. External threaded ring; 22. Second external hexagon; 23. Receiving ring groove; 3. Contact collar; 31. Collar body; 32. Contact ring; 33. Abutment end ring; 4. Internal coupling; 41. Combined with foundation; 411. Combined with cylinder; 412. Circular cavity side hole; 413. Through hole inside cylinder; 414. Right stop ring; 415. Left stop ring; 416. Through side hole; 417. Axial narrow hole. 42. Active component; 421. Active screw; 422. Right stop plate; 423. Left drive rod; 424. Driven gear; 425. Driven solenoid; 426. Drive side arm; 427. Active slant groove; 43. Radial displacement assembly; 431. Radial displacement insert; 432. Receiving groove; 433. Driven plug; 44. Torsional assembly; 441. Planetary gear; 442. Peripheral gear; 5. Pressing assembly; 51. Internally threaded tube; 52. Pressing screw; 53. Anti-rotation slot; 6. Pressure sensor; 9. Drum brake, 91. Stand, 92. Brake wheel, 93. Brake arm, 94. Electromagnet, 95. Brake spring. Detailed Implementation

[0029] A static braking torque monitoring system for an elevator in use, used to monitor the braking spring 95 of the elevator drum brake 9, includes a central shaft base 1, an outer drive ring 2, a contact collar 3, an inner coupling 4, a top pressure assembly 5, and a pressure sensor 6. The central shaft base 1 includes a thin shaft portion 11 and a thick shaft portion 12; the thin shaft portion 11 includes a fine threaded rod 111, a first external hexagon 112 disposed on the left side of the outer wall of the fine threaded rod 111, an adjustment channel 113 disposed within the fine threaded rod 111, an adjustment column 114 disposed on the right half of the outer wall of the fine threaded rod 111, an annular groove 115 disposed on the outer wall of the adjustment column 114, and adjustment side holes 116 evenly distributed circumferentially on the annular groove 115 and communicating with the adjustment channel 113, each adjustment side hole 116 Planetary gear shafts 117 are respectively arranged axially inside; the coarse shaft part 12 includes a coarse thread rod 121 arranged at the right end of the fine thread rod 111, an inner circular cavity 122 arranged in the coarse thread rod 121 and communicating with the adjustment channel 113, a limiting inner ring 123 arranged in the inner wall of the inner circular cavity 122, an anti-rotation key 124 arranged in the inner wall of the limiting inner ring 123, an adjustment opening 125 arranged at the upper right end of the inner circular cavity 122, and circular cavity side holes 126 evenly distributed on the left side of the inner circular cavity 122.

[0030] The outer drive ring 2 includes an external threaded ring 21 screwed onto the coarse threaded rod 121, a second external hexagon 22 formed on the right side of the external threaded ring 21, and a receiving ring groove 23 formed on the left side of the inner wall of the external threaded ring 21.

[0031] The contact collar 3 includes a collar body 31 inserted into the receiving ring groove 23, a contact ring 32 formed on the inner wall of the collar body 31, and an abutment end ring 33 located on the left side of the collar body 31; the axial length of the contact ring 32 is greater than the axial length of the receiving ring groove 23.

[0032] The inner coupling 4 is disposed within the central shaft base 1, and the inner coupling 4 is connected to the contact collar 3 in the extended state; the inner coupling 4 includes a coupling base 41, an active component 42, a radial displacement component 43, and a torsion component 44. The connecting base 41 includes a connecting cylinder 411 slidably disposed in the inner cavity 122 of the rod, an inner through hole 413 circumferentially distributed on the outer wall of the connecting cylinder 411 and locked with the side hole 412 of the cavity and the connecting cylinder 41, a right stop ring 414 disposed on the right half of the inner through hole 413, a left stop ring 415 disposed on the left end face of the inner through hole 413, a through side hole 416 circumferentially distributed on the outer periphery of the inner through hole 413, and an axial narrow hole 417 disposed on the left side of the through side hole 416. The active component 42 includes an active screw 421 passing through the right stop ring 414 and the left stop ring 415, a right stop plate 422 located at the right end of the active screw 421, a left active rod 423 located on the left side of the active screw 421, a driven gear 424 located at the left end of the left active rod 423, a driven solenoid 425 screwed to the outer wall of the active screw 421, a drive side arm 426 circumferentially distributed on the outer wall of the driven solenoid 425 and corresponding one-to-one with the through side hole 416, and an active inclined groove 427 located on the drive side arm 426. The radial displacement assembly 43 is inserted into the through side hole 416, the radial displacement rod 431 is provided at the lower end of the radial displacement rod 431 and accommodates the drive side arm 426 to pass through, and the driven plug 433 is provided in the accommodating groove 432 and cooperates with the active inclined groove 427. The torsion assembly 44 includes a planetary gear 441 that corresponds one-to-one with the planetary gear shaft 117 and meshes with the driven gear 424, and an outer peripheral gear 442 that meshes with the outer periphery of the planetary gear 441.

[0033] As a further implementation, the through side hole 416 is provided with radial guide grooves 418 at the front and rear, and the radial displacement rod 431 is provided with guide strips that cooperate with the guide grooves 418 at the front and end faces.

[0034] The top-pressing assembly 5 is disposed in the inner cavity 122 of the rod and is used to drive the inner coupling 4 to move to the left. The top-pressing assembly 5 includes a rotatable internal threaded tube 51 disposed at the right end of the inner cavity 122 of the rod, a top-pressing screw 52 screwed into the internal threaded tube 51, and an anti-rotation slot 53 disposed on the upper edge of the top-pressing screw 52 and engaged with the anti-rotation key 124.

[0035] The pressure sensor 6 is located inside the inner cavity 122 of the rod, on the right side of the top pressure assembly 5.

[0036] The drum brake 9 includes at least a frame 91, a brake wheel 92, a brake arm 93, an electromagnet 94, and a brake spring 95. One end of the brake spring 95 abuts against the brake arm 93, and the other end abuts against the contact collar 3.

[0037] The pressure sensor 6 is a disc-type pressure sensor, and the pressure sensor 6 is connected to a control unit and a display device.

[0038] The monitoring system described in this invention has the following normal operating mode: The brake spring 95 is positioned on the outer periphery of the central shaft base 1 and abuts against the left side of the contact collar 3; When in use, the central shaft base 1 is passed through the brake arm 93 and screwed onto the side of the frame 91 through the fine threaded rod 111 to complete the fixation; Twisting the second outer hexagon 22 causes the outer drive ring 2 to rotate to the left and move the contact collar 3 to slide to the left. The contact collar 3 presses the brake spring 95, and the brake spring 95 gives the brake arm 93 a leftward elastic force, thereby achieving braking.

[0039] The monitoring system described in this invention can be switched to monitoring mode to monitor the elastic force of the brake spring 95 in order to obtain the braking torque.

[0040] S1, Connection state switching of contact collar 3: Under normal conditions, since the axial length of the contact ring 32 is greater than the axial length of the receiving ring groove 23, the receiving ring groove 23 abuts against the contact ring 32, that is, the outer drive ring 2 and the contact collar 3 achieve transmission connection. Rotating the outer peripheral gear 442 drives the planetary gear 441 to rotate, and the planetary gear 441 drives the driven gear 424, the left driving rod 423, and the driving screw 421. The active screw 421 drives the driven solenoid 425, the driving side arm 426, and the active inclined groove 427 to move to the left; The active inclined groove 427 acts on the driven plug 433, thereby driving the radial displacement rod 431 to move radially outward and insert into the contact ring 32, realizing the transmission connection between the inner connector 4 and the contact collar 3; S2, the position of the contact collar 3 shifts slightly: The internally threaded tube 51 is rotated by adjusting the opening 125; Because the top pressure screw 52, ​​the anti-rotation slot 53 and the anti-rotation key 124 are engaged, the top pressure screw 52 has no rotational freedom. The internal threaded tube 51 rotates to the right relative to the top pressure screw 52 and moves until it comes into contact with the pressure sensor 6. Continue rotating the internal threaded tube 51, the top pressure screw 52 moves to the left, thereby pushing the entire inner coupling 4 and contact collar 3 to move a small distance to the left; the elastic force of the brake spring 95 is transmitted to the pressure sensor 6 through the contact collar 3, inner coupling 4, and top pressure assembly 5, and the pressure sensor 6 reads the spring force.

[0041] It should be noted that the internally threaded tube 51 has a closed end face.

[0042] As a further implementation, the closed end face is a truncated cone that is wider on the left and narrower on the right.

[0043] Furthermore, the closed end face is provided with rotatable ball bearings.

[0044] It should be noted that the outer wall of the internally threaded tube 51 is circumferentially covered with axially arranged anti-slip textures, which facilitate manual twisting and rotation.

[0045] It should be noted that the outer wall of the internally threaded tube 51, the outer wall of the connecting cylinder 411, and the outer wall of the active screw 421 are lubricated to reduce the additional resistance generated during the operation of the monitoring system.

[0046] Furthermore, the above operation can also be performed without contacting the brake spring 95 with the contact collar 3. The reading of the pressure sensor 6 is the basic resistance generated by the internal operation of the monitoring system. This basic resistance can be subtracted during subsequent monitoring to obtain a more accurate value of the elastic force of the brake spring 95. This elastic force value is proportional to the braking force of the brake wheel 92 and has great monitoring significance.

Claims

1. A static braking torque monitoring system for an elevator in use, used to monitor the brake spring (95) of the elevator drum brake (9), characterized in that: Includes central shaft base (1), outer drive ring (2), contact collar (3), inner coupling (4), top pressure assembly (5), and pressure sensor (6); The central shaft base (1) includes a thin shaft part (11) and a thick shaft part (12). The thin shaft part (11) includes a thin threaded rod (111), a first external hexagon (112) disposed on the left side of the outer wall of the thin threaded rod (111), an adjustment channel (113) disposed in the thin threaded rod (111), an adjustment column (114) disposed on the right half of the outer wall of the thin threaded rod (111), an annular groove (115) disposed on the outer wall of the adjustment column (114), and adjustment side holes (116) evenly distributed on the annular groove (115) and communicating with the adjustment channel (113). Each adjustment side hole (116) is provided with a planetary gear shaft (117) along the axial direction. The coarse shaft part (12) includes a coarse thread rod (121) disposed at the right end of the fine thread rod (111), an inner cylindrical cavity (122) disposed in the coarse thread rod (121) and communicating with the adjustment channel (113), a limiting inner ring (123) disposed on the inner wall of the inner cylindrical cavity (122), a non-rotation key (124) disposed on the inner wall of the limiting inner ring (123), an adjustment opening (125) disposed at the upper right end of the inner cylindrical cavity (122), and cylindrical cavity side holes (126) evenly distributed on the left side of the inner cylindrical cavity (122). The outer drive ring (2) includes an outer threaded ring (21) screwed onto the coarse threaded rod (121), a second outer hexagon (22) formed on the right side of the outer threaded ring (21), and a receiving ring groove (23) formed on the left side of the inner wall of the outer threaded ring (21). The contact collar (3) includes a collar body (31) inserted into the receiving ring groove (23), a contact ring (32) formed on the inner wall of the collar body (31), and an abutment end ring (33) provided on the left side of the collar body (31). The inner coupling (4) is set inside the central shaft base (1), and the inner coupling (4) is connected to the contact collar (3) in the extended state; The top pressure assembly (5) is disposed in the inner cavity (122) of the rod to drive the inner connector (4) to move to the left; The pressure sensor (6) is located inside the inner cavity (122) of the rod, on the right side of the top pressure assembly (5).

2. The static braking torque monitoring system for an elevator in use according to claim 1, characterized in that: The inner connector (4) includes a bonding base (41), an active component (42), a radial displacement component (43), and a torsion component (44). The connecting base (41) includes a connecting cylinder (411) that can slide inside the inner cavity (122) of the rod, an inner through hole (413) that is circumferentially distributed on the outer wall of the connecting cylinder (411) and locks with the side hole (412) of the cavity and the connecting cylinder (41), a right stop ring (414) located on the right half of the inner through hole (414), a left stop ring (415) located on the left end face of the inner through hole (414), a through side hole (416) that is circumferentially distributed on the outer periphery of the inner through hole (413), and an axial narrow hole (417) located on the left side of the through side hole (416). The active component (42) includes an active screw (421) passing through the right stop ring (414) and the left stop ring (415), a right stop plate (422) located at the right end of the active screw (421), a left active rod (423) located on the left side of the active screw (421), a driven gear (424) located at the left end of the left active rod (423), a driven solenoid (425) screwed to the outer wall of the active screw (421), a drive side arm (426) circumferentially distributed on the outer wall of the driven solenoid (425) and corresponding one-to-one with the through side hole (416), and an active inclined groove (427) located on the drive side arm (426). The radial displacement assembly (43) is connected to the radial displacement rod (431) through the through side hole (416) one by one, the receiving groove (432) is provided at the lower end of the radial displacement rod (431) and accommodates the drive side arm (426) to pass through, and the driven plug (433) is provided in the receiving groove (432) and cooperates with the active inclined groove (427). The torsion assembly (44) includes a planetary gear (441) that corresponds one-to-one with the planetary gear shaft (117) and meshes with the driven gear (424), and an outer peripheral gear (442) that meshes with the outer periphery of the planetary gear (441).

3. The static braking torque monitoring system for an elevator in use according to claim 2, characterized in that: The top pressing assembly (5) includes a rotatable internally threaded tube (51) located at the right end of the inner cavity (122) of the rod, a top pressing screw (52) screwed into the internally threaded tube (51), and a non-rotating slot (53) located on the upper edge of the top pressing screw (52) and engaged with the non-rotating key (124).

4. The static braking torque monitoring system for an elevator in use according to claim 3, characterized in that: The axial length of the contact ring (32) is greater than the axial length of the receiving ring groove (23).

5. The static braking torque monitoring system for an elevator in use according to claim 4, characterized in that: The through side hole (416) is provided with radial guide grooves (418) at the front and rear respectively, and the radial displacement rod (431) is provided with guide strips that cooperate with the guide grooves (418) at the front and end faces respectively.

6. The static braking torque monitoring system for an elevator in use according to claim 5, characterized in that: The drum brake (9) includes at least a stand (91), a brake wheel (92), a brake arm (93), an electromagnet (94), and a brake spring (95), with one end of the brake spring (95) abutting against the brake arm (93) and the other end abutting against the contact collar (3).

7. The static braking torque monitoring system for an elevator in use according to claim 6, characterized in that: The pressure sensor (6) is a disc-type pressure sensor.

8. The static braking torque monitoring system for an elevator in use according to claim 7, characterized in that: The pressure sensor (6) is connected to a control unit and a display device.

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