Escalator step torsion test device
By designing a torsion test device for escalator steps, a load is applied to the steps using a motor-driven eccentric wheel and connecting rod. This solves the problem of damage to short-axis steps under dynamic loads, enables effective torsion testing, and improves safety and ease of operation.
Patent Information
- Application Number
- CN202521508884.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-18
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-18
AI Technical Summary
In the existing technology, the short-axis step is easily damaged under dynamic loads, and there is a lack of a dedicated torsion test device, which leads to safety hazards. In addition, during peak passenger flow, the number of passengers is large and the dynamic load is complex and variable, making it difficult to conduct effective torsion tests.
Design an escalator step torsion test device, including a test bench and a reciprocating movement mechanism. The device applies load to the step assembly by driving an eccentric wheel and connecting rod with a motor to simulate the actual use condition and conduct a step torsion durability test.
Torsion tests on short-axis steps were achieved, ensuring that the steps do not fail under dynamic loads, thus improving safety and meeting the requirements of ease of operation and reliability of torsion tests.
Smart Images
Figure CN224681776U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of torsion test, especially relates to a staircase step torsion test device of escalator. BACKGROUND
[0002] Escalator refers to the fixed power drive equipment with circulating operation steps for upward or downward inclined transportation of passengers, and is widely applied in personnel-intensive places such as stations, wharfs, shopping malls, airports and subways. The step is the main component of the escalator, and is driven by the driving device and the step chain to circulate on the truss, so as to provide a standing platform for passengers and transfer load, and belongs to one of the core components of the escalator.
[0003] With the rapid development of society, in order to pursue more efficient commuting methods, people stand on the right side by default in public places, and leave the left side to passengers who pursue efficiency. This will cause the load received by the left and right sides of the step to be different, and the step will inevitably vibrate slightly during operation, which increases the unevenness of the force received by the left and right sides of the step. In the long run, the step will deform slightly and may eventually cause damage to the step, causing personal injury. Therefore, the steps and the tread of the escalator and the moving sidewalk need to be subjected to torsion test to protect the safety of passengers.
[0004] When the torsion test is performed, a load is required to be applied at the step tread, and after removing one follow-up roller, a non-interfering resonant force wave with any frequency between 5Hz and 20Hz is applied to the pulsating load for at least 5x10 6 cycles. After the test, the step should not have cracks, and the permanent deformation on the tread surface should not be greater than 4mm. The step or its components (such as inserts or fasteners) should be reliably connected and not loose. When one follow-up roller of the escalator is missing or damaged, the escalator is required to continue to operate, and the step is still subjected to the load pressure of the passengers to ensure that when the escalator is missing one follow-up roller, the passengers will not be injured by the step breaking when riding the escalator. When the escalator is maintained, the new follow-up roller is replaced in time to ensure the safety of the public.
[0005] However, in the normal operation of the escalator, especially in public places with large passenger flow and long peak passenger flow time, the number of passengers riding the escalator is large, and the riding time is long, so the direction and size of the dynamic load on the escalator step are complex and changeable. In addition to the possibility of causing the problem of missing the follow-up roller, the dynamic load on the step may also cause damage to the step shaft and the step shaft sleeve, especially the short shaft step. The step can be simply divided into long shaft step and short shaft step according to the length of the step shaft. The long shaft step means that the step shaft connecting the two main wheels is a through shaft, and the short shaft step means that the two main wheels are connected by two shorter short shaft steps. The short shaft step has the advantages of saving step shaft material and optimizing the structure of the escalator. However, under the condition of long-term dynamic load, the short shaft step and the shaft sleeve are more likely to be damaged, which may cause personal injury.
[0006] Therefore, a special torsion test for the short shaft step is needed, and the loading mode of the test is different from the ordinary step torsion test. Special tooling and loading equipment are needed, and currently there is still a blank in the research and development of the matching device for this test project in China. Practical new type content
[0007] The purpose of the present application is to provide an escalator step torsion test device to solve the problems of the prior art and to make the torsion test of the short shaft step possible and simple to operate.
[0008] To achieve the above-mentioned purpose, the present application provides the following scheme:
[0009] The present application provides an escalator step torsion test device, which comprises a test table and a reciprocating movement mechanism. A to-be-tested step assembly is arranged on the inclined surface of the test table and can make the tread plate of the step assembly in a horizontal position. The short shaft of a roller at a higher position is movably connected with the reciprocating movement mechanism, and the short shaft of another roller is fixedly connected with the inclined surface of the test table. The rollers at a lower position are in rolling contact with the inclined surface of the test table.
[0010] As an optional solution, the reciprocating movement mechanism in the embodiment comprises a motor, a connecting rod and an eccentric wheel. The rotating shaft of the motor is connected with the eccentric wheel. One end of the connecting rod is connected to the eccentric wheel, and the other end is hingedly connected with the short shaft.
[0011] As an optional solution, the eccentricity of the eccentric wheel in the embodiment is 3mm. The motor is a four-stage motor, and the motor is communicatively connected with a control unit. The vibration frequency of the reciprocating movement mechanism is 5Hz-20Hz, and the cycle number is at least 5x10 6 .
[0012] As an alternative, the end of the connecting rod is provided with a circular groove, and the eccentric wheel is sleeved in the circular groove and connected to the rotating shaft of the motor by a key.
[0013] As an alternative, a bearing is arranged between the eccentric wheel and the circular groove.
[0014] As an alternative, a shaft sleeve is arranged on the rotating shaft of the motor, and the end of the connecting rod is bolted to the shaft sleeve.
[0015] As an alternative, the end of the connecting rod is provided with a circular ring, and the circular ring is sleeved on the short shaft.
[0016] As an alternative, the short shaft of the roller is fixedly connected to the inclined surface of the test bench through a pair of hinged seats, and the mounting height of the hinged seat matches the radius of the roller.
[0017] As an alternative, the test bench comprises a right-angled trapezoidal inclined surface box, the inclined surface is arranged on the inclined waist side of the right-angled trapezoidal, the top surface is arranged on the upper bottom, the surface where the lower bottom is located is fixed to the ground, and the motor of the reciprocating moving mechanism is arranged on the top surface; or the test bench comprises a pair of right-angled trapezoidal inclined surface boxes and a square box, the inclined surface boxes are symmetrically arranged, the inclined surface is arranged on the inclined waist side of the right-angled trapezoidal, the surface where the straight waist side is located is fixed to the ground, the height of the square box is at least the length of the lower bottom of the right-angled trapezoidal, and the motor of the reciprocating moving mechanism is arranged on the square box.
[0018] As an alternative, the inclination angle of the inclined surface is 30°.
[0019] The utility model discloses have obtained following technical effect compared with prior art:
[0020] The utility model discloses a new simulation test method, i.e. installing the measured step on the test bench, applying load to the step shaft dynamically through the reciprocating moving mechanism, carrying out step torsional endurance test, and realizing the torsional test of the step. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.
[0022] Figure 1 The structure of the automatic escalator step torsional test device in the embodiments of the utility model is shown.Figure One ;
[0023] Figure 2 Structure diagram of the automatic escalator step torsion test device in the embodiment of the utility model Figure Two ;
[0024] Figure 3 Structure diagram of the automatic escalator step torsion test device in the embodiment of the utility model Figure Three ;
[0025] Figure 4 The assembly structure diagram of the connecting rod in the embodiment of the utility model is shown in the figure.
[0026] Figure 5 The structure diagram of the connecting rod in the embodiment of the utility model is shown in the figure.
[0027] Figure 6 The structure diagram of the shaft sleeve in the embodiment of the utility model is shown in the figure.
[0028] In the figure: 1-square box, 2-inclined surface box body, 3-step assembly, 4-short shaft, 5-hinge seat, 6-roller, 7-motor, 8-connecting rod, 9- eccentric wheel, 10-bearing, 11-ring, 12-shaft sleeve, 13-control cabinet. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0030] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "clockwise", "counterclockwise" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second", "third", "fourth" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0031] Further, it needs to be explained that, in the description of the utility model, unless another explicit provision and limitation, the terms "arrange", "connect", "connect" should be broad sense, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can indirectly connect through the intermediate medium, can be two elements inside the communication. For those skilled in the art, the above terms can be understood according to the specific meaning of the utility model.
[0032] The utility model aims at providing a kind of escalator step torsion test device, to solve the problems existing in prior art, make the torsion test of short shaft step be implemented, and simple operation.
[0033] In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the utility model is further described in detail below with the drawings and specific embodiments.
[0034] Example one
[0035] As Figures 1 to 6 Indicated, the utility model provides a kind of escalator step torsion test device in the embodiment, including test table and reciprocating movement mechanism, the inclined plane of test table is provided with a to be measured step assembly 3, and the step assembly 3 can be made to be in horizontal position, the short shaft 4 of one roller 6 at higher position of step assembly 3 is movably connected with reciprocating movement mechanism, and the short shaft 4 of another roller 6 is fixedly connected with the inclined plane of test table, and the roller 6 at lower position of step assembly 3 is in rolling contact with the inclined plane of test table. In the embodiment, one side of step assembly 3 is fixed, and the other side movably connects reciprocating movement mechanism, to simulate the situation that the left and right sides of step are unevenly stressed.
[0036] As an optional scheme, the reciprocating movement mechanism includes motor 7, connecting rod 8 and eccentric wheel 9 in the embodiment, the rotating shaft of motor 7 is connected with eccentric wheel 9, one end of connecting rod 8 is connected to eccentric wheel 9, and the other end is hinged with short shaft 4. In the embodiment, eccentric wheel 9 is used to provide dynamic load of reciprocating movement to one side of step assembly 3.
[0037] As an optional scheme, the eccentricity of eccentric wheel 9 is not more than 3mm in the embodiment, and the eccentricity is preferably 3mm, so that the maximum displacement of short shaft 4 of roller 6 can reach 6mm, to meet the experimental requirements, motor 7 is four-stage motor, motor 7 is communicatively connected with a control unit, the vibration frequency of reciprocating movement mechanism is 5Hz-20Hz, and the cycle number is at least 5x10 6, to meet the requirements of the torsion test. In this embodiment, the motor 7 is preferably a four-stage motor, and when the vibration frequency of the reciprocating mechanism is 50 Hz, the corresponding rated speed of the four-stage motor is 1450 rad / min, when the vibration frequency of the reciprocating mechanism is 5 Hz, the corresponding speed of the four-stage motor is 145 rad / min, and when the vibration frequency of the reciprocating mechanism is 20 Hz, the corresponding speed of the four-stage motor is 580 rad / min. The control unit can be a control cabinet 13, which is provided with start, stop, emergency stop, power supply buttons and audible and visual alarms. During the experiment, the vibration frequency of the reciprocating mechanism can be directly input on the control cabinet 13, and the control unit can calculate the corresponding speed of the motor.
[0038] As an optional solution, the end of the connecting rod 8 is provided with a circular groove, and the eccentric wheel 9 is sleeved in the circular groove. The eccentric wheel 9 is connected to the rotating shaft of the motor 7 through a key. The eccentric wheel 9 drives the position movement of the connecting rod 8 by eccentric rotation. The structure is simple to assemble and easy to maintain.
[0039] As an optional solution, a bearing 10 is arranged between the eccentric wheel 9 and the circular groove to reduce the rotating friction and the impact damage to the circular groove.
[0040] As an optional solution, a shaft sleeve 12 is arranged on the rotating shaft of the motor 7, and the end of the connecting rod 8 is connected to the shaft sleeve 12 through bolts. This can limit the position of the eccentric wheel 9 and the connecting rod 8, and avoid the structure from being scattered. In this embodiment, the eccentric wheel 9 and the shaft sleeve 12 are an integral structure, which is installed on the rotating shaft of the motor 7.
[0041] As an optional solution, the end of the connecting rod 8 is provided with a circular ring 11, which is sleeved on the short shaft 4. Bearings can also be arranged between the circular ring 11 and the short shaft 4 to form a hinged chain, which can avoid the reciprocating motion from being stuck.
[0042] As an optional solution, the short shaft 4 of the roller 6 is fixedly connected to the inclined surface of the test bench through a pair of hinged seats 5. The installation height of the hinged seat 5 matches the radius of the roller 6, so that the tread plate of the ladder assembly 3 is in a horizontal position, which can better simulate the use state.
[0043] As an alternative, the test bench in the embodiment includes an oblique box 2 with a right-angled trapezoidal shape, the oblique waist edge of the right-angled trapezoidal shape is provided with an inclined surface, the upper base is provided with a top surface, the surface where the lower base is located is fixed to the ground, and the motor 7 of the reciprocating moving mechanism is arranged on the top surface; or, the test bench includes a pair of oblique box 2 with a right-angled trapezoidal shape and a square box 1, the oblique box 2 is symmetrically arranged, the oblique waist edge of the right-angled trapezoidal shape is provided with an inclined surface, the straight waist edge is fixed to the ground, the height of the square box 1 is at least the length of the lower base of the right-angled trapezoidal shape, the motor 7 of the reciprocating moving mechanism is arranged on the square box 1, and the position of the square box 1 is variable, so that the experiment on any one side of the two sides of the step assembly 3 to be tested can be performed as required.
[0044] As an alternative, the inclination angle of the inclined surface in the embodiment is 30°, which meets the requirements of the step torsion experiment of the short shaft 4.
[0045] Embodiment Two
[0046] The embodiment provides a use method of the escalator step torsion test device, and the use method is specifically as follows.
[0047] During the test, the step assembly 3 is first placed on the 30° inclined surface of the test bench, and the follow-up roller 6 is allowed to move only in the direction of 30° to the step tread according to the experimental requirements. According to the diameter of the short shaft 4 of the step assembly 3, the pivot tool (hinge seat 5) is designed, the short shaft 4 on one side of the step assembly 3 is fixed on the 30° inclined surface, and the short shaft 4 on the other side is subjected to a load. The load is applied to the short shaft 4 of the step assembly 3 through the eccentric wheel 9 and the connecting rod 8 connected to the output end of the motor 7, so that the short shaft 4 of the step assembly 3 can be regularly reciprocated when the motor 7 outputs the torque, the displacement deviation during the test can reach ±3 mm, and the force applying device required by the experiment is realized to make the “free end” of the step chain shaft produce a total displacement of not less than 6 mm in the two directions of 30° to the step tread. The rotation speed of the motor 7 is controlled through the control unit, and different vibration frequencies are realized; according to the experimental requirements, the total number of tests and the test frequency of the torsion performance test of the step assembly 3 can be set through the control unit, so that the reciprocating moving mechanism performs vibration cycles with a vibration frequency of 5 Hz to 20 Hz for not less than 5×10 6 times.
[0048] The escalator step torsion test device in the embodiment solves the problem that the research and development of the matching device for the test project is still a blank in China, and is a new simulation test method, that is, the step to be tested is installed on the test bench, a dynamic load is applied to the step shaft through the reciprocating moving mechanism, and a step torsion durability test is performed, so that the step torsion test is realized.
[0049] In the description of the present specification, the description referring to the terms "one embodiment", "certain embodiments", "exemplary embodiments", "the present embodiment", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the described embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0050] The principle and implementation mode of the present application are described in the specific examples in the present application, and the above embodiment description is only used to help understand the method and core idea of the present application. Meanwhile, according to the idea of the present application, the specific implementation mode and application range will be changed by the general technical personnel in the field. In conclusion, the content of the present specification should not be understood as a limitation of the present application.
Claims
1. A torsion testing device for escalator steps, characterized in that: The device includes a test bench and a reciprocating movement mechanism. A step assembly to be tested is arranged on the inclined surface of the test bench, and the step of the step assembly is able to be in a horizontal position. The short shaft of one roller of the step assembly located at the higher position is movably connected to the reciprocating movement mechanism, and the short shaft of the other roller is fixedly connected to the inclined surface of the test bench. The roller of the step assembly located at the lower position makes rolling contact with the inclined surface of the test bench.
2. The escalator step torsion testing device according to claim 1, characterized in that: The reciprocating motion mechanism includes a motor, a connecting rod, and an eccentric wheel. The motor shaft is connected to the eccentric wheel, and one end of the connecting rod is connected to the eccentric wheel, while the other end is hinged to the short shaft.
3. The escalator step torsion testing device according to claim 2, characterized in that: The eccentricity of the eccentric wheel is 3mm; the motor is a four-pole motor and is communicatively connected to a control unit; the vibration frequency of the reciprocating mechanism is 5Hz~20Hz, and the number of cycles is at least 5×10. 6 .
4. The escalator step torsion testing device according to claim 2, characterized in that: The end of the connecting rod is provided with a circular groove, the eccentric wheel is sleeved in the circular groove, and the eccentric wheel is connected to the rotating shaft of the motor by a key.
5. The escalator step torsion testing device according to claim 4, characterized in that: A bearing is provided between the eccentric wheel and the circular groove.
6. The escalator step torsion testing device according to claim 2, characterized in that: A bushing is provided on the rotating shaft of the motor, and the end of the connecting rod is connected to the bushing by bolts.
7. The escalator step torsion testing device according to claim 2, characterized in that: The end of the connecting rod is provided with a ring, which is sleeved on the short shaft.
8. The escalator step torsion testing device according to claim 1, characterized in that: The short shaft is fixedly connected to the inclined surface of the test bench by a pair of hinge seats, the installation height of which matches the radius of the roller.
9. The escalator step torsion testing device according to claim 1, characterized in that: The test bench includes a right-angled trapezoidal inclined box, with the inclined surface provided on the inclined side of the right-angled trapezoid, a top surface provided on the upper base, and the lower base fixed to the ground. The motor of the reciprocating movement mechanism is provided on the top surface. Alternatively, the test bench includes a pair of right-angled trapezoidal inclined boxes and a square box. The inclined boxes are symmetrically arranged, with the inclined surface provided on the inclined side of the right-angled trapezoid, the straight side fixed to the ground, and the height of the square box being at least the length of the lower base of the right-angled trapezoid. The motor of the reciprocating movement mechanism is provided on the square box.
10. The escalator step torsion testing device according to claim 1, characterized in that: The inclination angle of the inclined plane is 30°.