Step static load test device

Abstract

The present invention discloses a static load test device for steps, comprising: a base, in which a plurality of guide cavities arranged in sequence along the width direction of the steps are opened, each guide cavity extending along the front-to-back direction of the steps; a loading mechanism, comprising a plurality of loading mechanisms corresponding one-to-one to the plurality of guide cavities, each loading mechanism comprising a loading body and a rectangular frame installed at the lower part of the loading body, the rectangular frame being correspondingly installed in the guide cavity and being able to move back and forth along the guide cavity, the loading body comprising a force-applying shaft extending from the bottom of the rectangular frame, the force-applying shaft being used to act on the upper surface of the steps; a plurality of drivers, comprising a plurality of drivers corresponding one-to-one to the plurality of loading mechanisms, the drivers being installed on the base and being used to correspondingly drive the rectangular frame to adjust the position of the rectangular frame in the guide cavity; a pressure sensor, wherein each loading body is equipped with a pressure sensor for collecting the load applied by the force-applying shaft to the steps.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator testing, in particular to a static load testing device for escalator steps. Background Art

[0002] As is known, escalator step static load testing equipment typically includes a load-applying mechanism, a pressure sensor mounted on the load-applying mechanism, and processing and control equipment for acquiring and analyzing the pressure signal from the pressure sensor. The load-applying mechanism applies a vertical load to the escalator steps. By gradually reducing the load, the critical load at which the steps transition from static to operational is determined, thereby determining the escalator's maximum operational load.

[0003] However, the static load test device in the prior art has the following defects:

[0004] 1. The test device only uses one loading mechanism to load a certain position of the step, such as the geometric center of the upper surface of the step. However, in actual operation of the escalator, multiple positions on the upper surface of the step may be loaded, and the loads may be different.

[0005] 2. During the loading process, when the steps move from static to running, they generate a horizontal motion component, which will produce a cross-beam impact on the force-applying shaft in the loading mechanism, thereby easily causing deformation of the force-applying shaft. Summary of the Invention

[0006] In view of the above technical problems existing in the prior art, an embodiment of the present invention provides a step static load test device.

[0007] To solve the above technical problems, the technical solutions adopted in the embodiments of the present invention are:

[0008] A step static load test device, comprising:

[0009] A base having a plurality of guide cavities arranged in sequence along the width direction of the step, each of the guide cavities extending along the front-to-back direction of the step;

[0010] A loading mechanism, comprising a plurality of loading mechanisms corresponding one to each of the guide cavities, each loading mechanism comprising a loading body and a rectangular frame mounted below the loading body, the rectangular frame being mounted in the guide cavity and capable of moving forward and backward along the guide cavity, the loading body comprising a force-applying shaft extending from the bottom of the rectangular frame, the force-applying shaft being configured to act on the upper surface of the step;

[0011] A plurality of drivers, each corresponding to each of the loading mechanisms, are mounted on the base and configured to drive the rectangular frame to adjust a position of the rectangular frame in the guide cavity;

[0012] A pressure sensor is installed on each loading body to collect the load applied by the force-applying shaft to the step.

[0013] Preferably, the lower end of each of the force-applying shafts is provided with a cylindrical end head, and the cylindrical end head is provided with a sliding shoe device;

[0014] The sliding shoe device comprises:

[0015] A retaining component having a slide groove, wherein the edge of the cylindrical end is embedded in the slide groove and can slide along the slide groove;

[0016] An elastic limiting component is provided on the groove wall of each of the sliding grooves, and the elastic limiting component is warped on both sides toward the cylindrical end head to retract the cylindrical end head.

[0017] Preferably, anti-slip components are fixed to the retaining components at both ends of the slide groove, and the anti-slip components are warped upward.

[0018] Preferably, stop platforms are formed on both sides of the bottom of the rectangular frame, and the stop platforms are used to abut against the bottom of the base; slide rails are formed on both sides of the middle part of the rectangular frame, and a slide channel is opened on the cavity wall of the guide cavity, and the slide rail is located in the slide channel.

[0019] Preferably, the driver comprises a hydraulic cylinder or an electric telescopic cylinder.

[0020] Preferably, the loading body further includes:

[0021] A support frame comprising an upper fixing plate, a lower fixing plate, and a column disposed between the upper fixing plate and the lower fixing plate;

[0022] A servo motor is installed above the upper fixed plate, and a lead screw is installed on the servo motor;

[0023] A movable plate is provided below the upper fixed plate, a nut sleeve is provided on the movable plate, the lead screw passes through the nut sleeve and forms a spiral transmission with the nut sleeve; wherein:

[0024] The pressure sensor is arranged between the movable plate and the force applying shaft.

[0025] Preferably, the movable plate comprises:

[0026] an upper movable plate, the nut set being arranged on the upper movable plate;

[0027] A lower movable plate is located between the upper movable plate and the lower fixed plate, and the pressure sensor is installed at the bottom of the lower movable plate; wherein:

[0028] A spring is installed between the upper movable plate and the lower movable plate.

[0029] Preferably, the bottom plate of the rectangular frame is equipped with a linear bearing, and the force-applying shaft passes through the linear bearing.

[0030] Preferably, a pressure head is provided below the pressure sensor, and the pressure head is used to abut against the upper end surface of the force-applying shaft, and a pressure bearing is installed between the pressure head and the pressure sensor.

[0031] Preferably, a guide column is provided between the upper fixed plate and the lower fixed plate, and a guide sleeve is installed on both the upper movable plate and the lower movable plate, and the guide column passes through the guide sleeve.

[0032] Compared with the prior art, the step static load test device disclosed in the present invention has the following beneficial effects:

[0033] 1. The test device provided by the present invention can load multiple positions of the step at the same time, and the loaded load is adjustable.

[0034] 2. By arranging a sliding shoe device at the lower end of the force-applying shaft, it is possible to effectively prevent the step from switching to the moving moment and causing an impact on the force-applying shaft and the loading mechanism.

[0035] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

[0036] This disclosure is an overview of various implementations or examples of the technology, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the embodiments of the invention. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive of the embodiments of the present apparatus or method.

[0038] Figure 1This is a diagram of the use status of the step static load test device provided by an embodiment of the present invention.

[0039] Figure 2 An enlarged view of the static load test device for steps provided by an embodiment of the present invention in use.

[0040] Figure 3 for Figure 2 A-direction view.

[0041] Figure 4 for Figure 2 B-direction view.

[0042] Figure 5 This is a schematic structural diagram of the loading mechanism in the step static load test device provided by an embodiment of the present invention.

[0043] Figure 6 This is a main sectional view of a sliding shoe device in a step static load test device provided by an embodiment of the present invention.

[0044] Figure 7 A top sectional view of a sliding shoe device in a step static load test device provided by an embodiment of the present invention.

[0045] Reference numerals:

[0046] 100-loading mechanism; 10-loading body; 11-force shaft; 111-cylindrical end; 12-support frame; 121-upper fixed plate; 122-lower fixed plate; 123-column; 131-upper movable plate; 132-lower movable plate; 141-screw; 142-nut; 151-guide column; 152-guide sleeve; 16-servo motor; 17-spring; 181-pressing head; 18 2-pressure bearing; 19-linear bearing; 20-rectangular frame; 21-base plate; 22-stop platform; 23-slide rail; 30-slide shoe device; 31-holding component; 311-slide groove; 32-elastic limiting component; 321-warping part; 33-anti-slip component; 40-base; 41-guide cavity; 42-slideway; 50-drive; 51-telescopic rod; 60-pressure sensor; 200-step. DETAILED DESCRIPTION

[0047] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0048] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0049] like Figures 1 to 7 As shown, an embodiment of the present invention discloses a step static load test device, which includes: a base 40 , a loading mechanism 100 , a driver 50 and a pressure sensor 60 .

[0050] The base 40 is roughly rectangular and has a plurality of guide cavities 41 formed thereon. Figure 3 As shown, when the test device is used to apply a load to the step 200, the plurality of guide cavities 41 are arranged along the width direction of the step 200, as shown in FIG. Figure 4 As shown, each guide cavity 41 extends along the front-to-rear direction of the step 200 .

[0051] The loading mechanism 100 includes multiple loading mechanisms 100, and the multiple loading mechanisms 100 correspond one-to-one to the multiple guide cavities 41 on the base 40. Each loading mechanism 100 includes a loading body 10 and a rectangular frame 20 installed at the lower part of the loading body 10. The rectangular frame 20 is installed in the corresponding guide cavity 41, so that each loading mechanism 100 is installed on the base 40. In this way, multiple loading mechanisms 100 are arranged on the base 40 along the width direction of the step 200.

[0052] Each loading mechanism 100 has stoppers 22 formed on both sides of the bottom plate 21 of the rectangular frame 20. These stoppers 22 are designed to abut against the bottom of the base 40, allowing the loading mechanism 100 to apply a load to the upper surface of the step 200. Slide rails 23 are formed on both sides of the rectangular frame 20. The walls of the guide cavity 41 define the slideway 42, extending forward and backward along the step 200. The slide rails 23 are installed within the slideway 42, enabling each loading mechanism 100 to move forward and backward along the guide cavity 41.

[0053] Each loading mechanism 100 corresponds to a driver 50. This driver 50 is fixed to the base 40 and corresponds to the loading mechanism 100. The driver 50 includes a telescopic rod 51. The telescopic rod 51 extends into the guide cavity 41 and connects to the rectangular frame 20 of the loading mechanism 100. This rod 51 is used to independently drive the loading mechanism 100 to move forward and backward along the steps 200. The driver 50 can be a hydraulic cylinder or an electric telescopic cylinder.

[0054] like Figure 5 As shown, the loading body 10 includes: a servo motor 16, a force shaft 11, a screw 141, a nut 142, a spring 17, a support frame 12 and a movable plate. The support frame 12 includes an upper fixed plate 121 and a lower fixed plate 122; a column 123 is set between the upper fixed plate 121 and the lower fixed plate 122 to enable the support frame 12 to have a vertical load-bearing capacity. The movable plate is set between the upper fixed plate 121 and the lower fixed plate 122, and the movable plate includes an upper movable plate 131 and a lower movable plate 132. A guide column 151 is set between the upper fixed plate 121 and the lower fixed plate 122 (at Figure 5 , the guide column 151 is shielded by the column 123), the upper movable plate 131 and the lower movable plate 132 are both provided with a guide sleeve 152, and the guide column 151 passes through the guide sleeve 152, so that the upper movable plate 131 and the lower movable plate 132 can move vertically.

[0055] The servo motor 16 is installed above the upper fixed plate 121 , the lead screw 141 is connected to the output shaft of the servo motor 16 , the nut sleeve 142 is installed on the upper movable plate 131 , and the lead screw 141 passes through the nut sleeve 142 to form a spiral transmission fit with the nut sleeve 142 .

[0056] The spring 17 is mounted between the upper movable plate 131 and the lower movable plate 132. The pressure sensor 60 is mounted on the bottom of the lower movable plate 132. A linear bearing 19 is mounted on the bottom plate 21 of the rectangular frame 20. The force application shaft 11 passes through the linear bearing 19, with the upper end of the force application bearing facing the pressure sensor 60. A pressure head 181 is disposed below the pressure sensor 60. The pressure head 181 is used to abut against the upper end of the force application shaft 11. A pressure bearing 182 is disposed between the pressure head 181 and the pressure sensor 60.

[0057] When it is necessary to use the loading mechanism 100 to apply a load to the step 200, the servo motor 16 is used to drive the screw 141 to rotate, and the upper movable plate 131 moves downward through the spiral transmission of the screw 141 and the nut sleeve 142, thereby compressing the spring 17, so that the load is transmitted to the lower movable plate 132 through the spring 17, and the lower movable plate 132 transmits the load to the force shaft 11 through the pressure sensor 60. The force shaft 11 applies a load to the step 200. At the same time, the pressure sensor 60 can obtain the applied load information.

[0058] In the present invention, Figure 7 As shown, a sliding shoe device 30 is installed at the lower end of each force application shaft 11. The lower end of the force application shaft 11 is provided with a cylindrical end 111. The sliding shoe device 30 includes: a retaining component 31, an anti-slip component 33, and an elastic limiting component 32. The retaining component 31 is provided with a sliding groove 311, which runs through the front and rear ends of the retaining component 31. The edge of the cylindrical end 111 is embedded in the sliding groove 311 and can slide along the sliding groove 311. The retaining component 31 is equipped with an anti-slip component 33 at both ends. The anti-slip component 33 is used to block the sliding groove 311 to prevent the cylindrical end 111 from escaping from the sliding groove 311. The anti-slip component 33 is configured to be warped upward.

[0059] The elastic limiting component 32 is roughly in the form of a strip structure, and the elastic limiting component 32 is provided on each side wall of the slide groove 311. Elastic warping portions 321 are formed on both sides of the elastic limiting component 32. The elastic warping portions 321 are used to limit the cylindrical end head 111 so that the cylindrical end head 111 is always roughly located in the center position of the slide groove 311. The slipper device 30 is used to directly contact the upper surface of the step 200. When a load is applied to the step 200, the force shaft 11 applies the load to the step 200 through the slipper device 30. At this time, the cylindrical end 111 is located in the center of the slipper device 30 under the contraction action of the elastic limiting component 32. When the step 200 switches from static to moving, the slipper device 30 moves with the step 200, and the cylindrical end 111 forces the elastic limiting component 32 to deform and remain static. In this way, the horizontal movement component of the step 200 will hardly impact the force shaft 11, thereby protecting the force shaft 11 and the entire loading mechanism 100.

[0060] When the step 200 is loaded using the above-mentioned test device, loading mechanisms 100 are arranged at different positions in the width direction of the step 200 to selectively apply loads to different positions on the width of the step 200, and the driver 50 is used to drive the corresponding loading mechanism 100 to adjust the loading position of the step 200 in the front-to-back direction.

[0061] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. A step static load test device, characterized in that: include: A base having a plurality of guide cavities arranged in sequence along the width direction of the step, each of the guide cavities extending along the front-to-back direction of the step; A loading mechanism, comprising a plurality of loading mechanisms corresponding one to each of the guide cavities, each loading mechanism comprising a loading body and a rectangular frame mounted below the loading body, the rectangular frame being mounted in the guide cavity and capable of moving forward and backward along the guide cavity, the loading body comprising a force-applying shaft extending from the bottom of the rectangular frame, the force-applying shaft being configured to act on the upper surface of the step; A plurality of drivers, each corresponding to each of the loading mechanisms, are mounted on the base and configured to drive the rectangular frame to adjust a position of the rectangular frame in the guide cavity; A pressure sensor is installed on each loading body to collect the load applied by the force-applying shaft to the step; The lower end of each force-applying shaft is provided with a cylindrical end head, and a sliding shoe device is installed on the cylindrical end head; The sliding shoe device comprises: A retaining component having a slide groove, wherein the edge of the cylindrical end is embedded in the slide groove and can slide along the slide groove; An elastic limiting component is provided on the groove wall of each of the chute, and the elastic limiting component is warped on both sides toward the cylindrical end head to retract the cylindrical end head; Anti-slip components are fixed to the retaining components at both ends of the slide, and the anti-slip components are warped upwards; Stop platforms are formed on both sides of the bottom of the rectangular frame, and the stop platforms are used to abut against the bottom of the base; slide rails are formed on both sides of the middle part of the rectangular frame, and slideways are opened on the cavity wall of the guide cavity, and the slide rails are located in the slideways.

2. The step static load test device according to claim 1, characterized in that: The driver includes a hydraulic cylinder or an electric telescopic cylinder.

3. The step static load test device according to claim 1, characterized in that: The loading body also includes: A support frame comprising an upper fixing plate, a lower fixing plate, and a column disposed between the upper fixing plate and the lower fixing plate; A servo motor is installed above the upper fixed plate, and a lead screw is installed on the servo motor; A movable plate is provided below the upper fixed plate, a nut sleeve is provided on the movable plate, the lead screw passes through the nut sleeve and forms a spiral transmission with the nut sleeve; wherein: The pressure sensor is arranged between the movable plate and the force applying shaft.

4. The step static load test device according to claim 3, characterized in that: The movable plate comprises: an upper movable plate, the nut set being arranged on the upper movable plate; A lower movable plate is located between the upper movable plate and the lower fixed plate, and the pressure sensor is installed at the bottom of the lower movable plate; wherein: A spring is installed between the upper movable plate and the lower movable plate.

5. The step static load test device according to claim 1, characterized in that: The bottom plate of the rectangular frame is equipped with a linear bearing, and the force-applying shaft rod passes through the linear bearing.

6. The step static load test device according to claim 1, characterized in that: A pressure head is provided below the pressure sensor, and the pressure head is used to abut against the upper end surface of the force-applying shaft. A pressure bearing is installed between the pressure head and the pressure sensor.

7. The step static load test device according to claim 4, characterized in that: A guide column is provided between the upper fixed plate and the lower fixed plate, and a guide sleeve is installed on both the upper movable plate and the lower movable plate, and the guide column passes through the guide sleeve.

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