Component measuring device

Abstract

The utility model provides a component measuring device, comprising a target measuring mechanism which comprises a target plate and a fixing part which is connected with the target plate to be fixed on a component; and the measuring mechanism comprises a moving part movably arranged on the component and a distance measuring part connected with the moving part for measurement. The target plate can be arranged at a measurement starting point and fixed through the fixing part, the distance measuring part can measure the distance to the target plate, the distance measuring part is driven to move through the moving part to adjust the distance, and after the distance is adjusted, the position of the distance measuring part is recorded for positioning. The device has the beneficial effects that the number of operators can be reduced, the measurement deviation is reduced, the operation efficiency is improved, the operation cost is reduced, the occupied space of the structure is small, and the device is detachable for repeated use.

Description

TECHNICAL FIELD

[0001] The utility model belongs to engineering construction technical field, especially a component measuring device. BACKGROUND

[0002] In the prior art, the steel column, crane beam and roof beam in the steel structure industrial plant are the core stress components of the main structure and account for more than 70% of the total amount of steel structure engineering, and are large slender components. The production of such components needs to measure the node plate positioning and geometric length repeatedly in the processes of material marking, assembly, transportation and installation. In the traditional steel structure production and processing process, the measurement of these long components is usually carried out by two people, i.e. one person pulls the ruler at one end of the component and the other person measures and marks the material at the other end, which consumes a lot of labor and cannot guarantee the measurement accuracy because the ruler is measured manually, and there is a large measurement deviation. In the process of measuring and marking the large long component, multiple people need to cooperate to carry out manual measurement, which consumes a lot of manpower and cannot guarantee the measurement quality. CONTENT OF THE UTILITY MODEL

[0003] To solve the above technical problems, the utility model provides a component measuring device, which is especially suitable for single person to quickly and accurately measure the large slender component.

[0004] The technical scheme adopted by the utility model is as follows: a component measuring device, a measuring target mechanism, which comprises a target plate and a fixing component connected with the target plate to be fixed on the component;

[0005] a measuring mechanism, which comprises a moving component movably arranged on the component and a distance measuring component connected with the moving component to measure.

[0006] Further, the fixing component comprises a fixing seat connected with the target plate, and the fixing seat is provided with at least one magnetic force assembly for fixing.

[0007] Further, the moving component comprises a moving seat connected with the distance measuring component, and the moving seat is provided with at least one roller.

[0008] Further, the measuring mechanism further comprises a marking component connected with the moving component to mark the position.

[0009] Further, the measuring mechanism further comprises an alarm component connected with the moving component, and the alarm component can receive the measurement result of the distance measuring component to prompt.

[0010] Further, at least one angle ruler assembly is further included, and at least one of the fixing component and the moving component is provided with the angle ruler assembly to position.

[0011] Further, the distance measuring component is rotationally connected with the moving component.

[0012] Furthermore, the target plate is rotatably connected to the fixed component.

[0013] Furthermore, the target plate is equipped with markings and / or verticality detection components.

[0014] Furthermore, the measuring mechanism also includes a suspension component, which includes a lug that can be connected to the movable component and a movable wheel that is rotatably connected to the lug. The lug is movably hung on the component via the movable wheel.

[0015] The advantages and positive effects of this utility model are: by adopting the above technical solution, the number of workers can be reduced, measurement deviation can be reduced, work efficiency can be improved, and work costs can be reduced; it has the advantages of small structural space occupation, improved measurement efficiency, reduced work costs, and the device can be disassembled for reuse. Attached Figure Description

[0016] Figure 1 This is a top view of a usage scenario of one embodiment of this utility model;

[0017] Figure 2 This is a top view of the target measuring mechanism in one embodiment of the present invention;

[0018] Figure 3 This is a side view of the target measuring mechanism in one embodiment of the present invention;

[0019] Figure 4 This is a top view of the measuring mechanism in one embodiment of the present invention;

[0020] Figure 5 This is a top view of the disassembled structure of the movable parts, as shown in one embodiment of the present invention for easy viewing.

[0021] Figure 6 It is by Figure 5 A schematic diagram of the side view structure;

[0022] Figure 7 It is by Figure 5 The resulting front view structural diagram;

[0023] Figure 8 This is a side view of the measuring mechanism in one embodiment of the present invention;

[0024] Figure 9 This is a cross-sectional structural diagram of the angle positioning component in one embodiment of the present invention;

[0025] Figure 10 This is a side view of a usage scenario of another embodiment of this utility model;

[0026] Figure 11 For easier viewing Figure 10An enlarged structural schematic view of the connecting assembly;

[0027] Figure 12 An enlarged structural schematic view of the connecting assembly;

[0028] In the figure:

[0029] 1, component 2, moving part 3, distance measuring part

[0030] 4, target measuring mechanism 5, hanging part 7, alarm part

[0031] 8, angle ruler assembly 9, node plate 21, moving seat

[0032] 22, roller 23, support frame 24, controller

[0033] 31, laser range finder 41, target plate 42, fixing seat

[0034] 43, positioning plate 51, hanging ear 52, connecting shaft

[0035] 53, moving wheel 54, connecting assembly 61, marking pen holder

[0036] 62, marking pen 221, wheel holder 231, support leg

[0037] 232, positioning roller 233, connecting rod 234, pointer

[0038] 235, angle scale 311, display panel 312, laser emitting port

[0039] 411, perpendicularity detecting assembly 412, target center line 413, target scale

[0040] 414, target plate adjusting roller 415, limiting piece 421, magnetic force assembly

[0041] 422, centering line 431, positioning plate adjusting roller 81, first measuring scale

[0042] 82, second measuring scale DETAILED DESCRIPTION

[0043] The embodiments of the present application will be described in detail below with reference to the drawings, and the described embodiments are only a part of the embodiments of the present application, not all the embodiments.

[0044] The embodiments of the present application will be described in detail below with reference to the drawings, and the described embodiments are only a part of the embodiments of the present application, not all the embodiments.

[0045] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. In the description of the present invention, it should be understood that terms such as "installation", "connection", and "fixing" should be interpreted broadly, and can refer to direct connection, installation or fixing, or indirect connection, installation or fixing, and the present invention does not impose any limitation in this regard.

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the structure or unit referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0047] Example 1:

[0048] like Figures 1 to 9 The diagram shows an embodiment of a component measuring device according to the present invention. It includes a target mechanism 4, comprising a target plate 41 and a fixing component connected to the target plate 41 and fixed to the component 1; and a measuring mechanism, comprising a movable component 2 movably mounted on the component 1 and a distance measuring component 3 connected to the movable component 2 for measurement. In this embodiment, the target plate 41 is set at the measurement starting point on the component 1. The distance from the target plate 41, i.e., the distance from the starting point, is measured by the distance measuring component 3 and read in real time. The position of the movable component 2 is adjusted to move the measuring mechanism to the required location, and the distance measuring component 3 performs real-time remeasurement to complete the positioning.

[0049] In this embodiment, the ranging component 3 is used to measure the distance from the starting point. The ranging component 3 includes a laser rangefinder 31 connected to the moving component 2. The laser rangefinder 31 is equipped with a display panel 311 and a laser emission port 312. The light emitted from the laser emission port 312 is projected onto the starting point or onto a target plate 41 at the starting point. The laser rangefinder 31 can receive laser signals to measure the distance from the starting point and output the measurement result to the display panel 311. Personnel can adjust the position of the ranging component 3 according to the output result of the display panel 311. When the measurement result meets the design requirements, the position of the laser rangefinder 31 is recorded in a timely manner to achieve rapid positioning.

[0050] The fixed part in the embodiment comprises a fixing base 42 connected with the target plate 41, and the fixing base 42 is provided with at least one magnetic force assembly 421 for fixing. The magnetic force assembly 421 comprises a magnetic force piece connected with the fixing base 42. When fixing is needed, the switch of the magnetic force piece can be opened, and the fixing base 42 can be quickly fixed on the metal component 1 by magnetic force. The fixing base 42 can be widely applied to the installation of steel structures, and is convenient to install and disassemble. The target plate 41 can be installed at various positions of the component 1 in a adjustable manner, and is suitable for various requirements of measuring the starting point position. The fixing base 42 can also ensure the stability after installation, ensure the accuracy of measurement, and is convenient to disassemble and reusable.

[0051] The moving part 2 in the embodiment comprises a moving base 21 connected with the distance measuring part 3. In the embodiment, the moving base 21 is connected with the laser range finder 31, and the moving base 21 is provided with at least one roller 22. The moving part 2 further comprises a wheel frame 221, and each roller 22 is rotationally connected with the moving base 21 through the wheel frame 221. In the embodiment, the number of the wheel frames 221 is plural, and the wheel frames 221 are parallelly arranged on the moving base 21. The two ends of the wheel frame 221 are rotationally provided with the rollers 22. In the embodiment, the rollers 22 can be divided into braking rollers and traveling rollers, and are installed on the corresponding ends of the wheel frame 221 according to requirements. The design of the rollers 22 can make the moving base 21 move more smoothly on the component 1, and make the personnel adjust the position of the moving base 21 more conveniently and labor-savingly. The unnecessary physical consumption can be avoided, and the measurement efficiency can be improved. The moving part 2 also comprises a controller 24 connected with the moving base 21 to control the rotation of the rollers 22, and further adjust the movement or stop of the moving part 2.

[0052] The measuring mechanism in the embodiment further comprises a marking part connected with the moving part 2 to mark the position. The marking part comprises a marking pen frame 61 and a marking pen 62, and the marking pen 62 is connected with the moving part 2 through the marking pen frame 61. The marking pen 62 can be used to conveniently and quickly mark and number materials, and facilitate subsequent cutting or assembling of the component 1.

[0053] The measuring mechanism further comprises an alarm component 7 connected with the moving component 2, which can receive the measurement result of the distance measuring component 3 to give a prompt. The alarm component 7 can comprise a data responder connected with the moving component 2, which is arranged on the moving seat 21 in the embodiment and can respond to the laser range finder 31 through the Internet of Things. In use, the design value can be recorded in the data responder in advance, the position of the moving seat 21 is adjusted, and the distance from the starting point is measured through the laser range finder 31. When the distance from the starting point reaches the design requirement, that is, the measurement result is consistent with the design value, the data responder can give an alarm, and the position is recorded in time through the marking pen 62 to locate. In the embodiment, the design requirement can be prompted in time for accurate positioning when measuring and positioning, and the personnel do not need to repeatedly check the design parameters, which can avoid repeated work caused by inaccurate positioning. The measurement and marking accuracy are ensured, and the work efficiency is improved.

[0054] The embodiment further comprises at least one angle ruler assembly 8 arranged on at least one of the fixed component and the moving component 2 to locate. The angle ruler assembly 8 comprises a first scale 81 and a second scale 82, and the fixed component and / or the moving component 2 is connected with the corresponding first scale 81. The first scale 81 needs to be parallel to the corresponding distance measuring component 3 or target plate 41. In the embodiment, each first scale 81 is parallel to the laser range finder 31 and the target plate 41. The second scale 82 is rotationally connected with the first scale 81 to set the angle of the distance measuring component 3 or the target plate 4. In the embodiment, the number of the angle ruler assembly 8 is two, one first scale 81 is connected with the fixed seat 42, and the other first scale 81 is connected with the moving seat 21. In the embodiment, the first scale 81 is nested and can be telescopic and measurable. The technology and specific assembly mode of the telescopic scale are prior art, and the design is not described herein. Generally, in measurement, the second scale 82 is rotated to be perpendicular to the first scale 81, the length of the first scale 81 is adjusted, and the second scale 82 can be attached to the edge of the component 1, that is, the distance measuring component 3 and / or the target plate 41 is adjusted to be perpendicular to the length direction of the component 1, and whether the position meets the design requirement is detected through the scales of the first scale 81 and the second scale 82. The length of the first scale 81 can also be adjusted to move the second scale 82, and multiple point measurement can be performed to improve the positioning accuracy. When the component measuring device is arranged on the web of the I-shaped steel beam, the second scale 82 can be adjusted to be attached to the flange of the I-shaped steel beam, the distance measuring component 3 and / or the target plate 41 is quickly positioned to be perpendicular to the flange, and the positioning accuracy is detected through the scales.

[0055] In the embodiment, the ranging component 3 is rotationally connected with the moving component 2. The moving component 2 also comprises a support frame 23, and the ranging component 3 is rotationally connected with the moving base 21 through the support frame 23. The support frame 23 comprises two support legs 231, positioning rollers 232 and a connecting rod 233. The two support legs 231 are oppositely arranged, each of which is connected with the moving base 21, and each of the ends of the support legs 231 away from the moving base 21 is provided with a positioning roller 232. The two oppositely arranged positioning rollers 232 are rotationally connected with the two ends of the connecting rod 233. The two support legs 231, the two positioning rollers 232 and the connecting rod 233 are connected with each other in a door shape. The ranging component 3 is arranged on the connecting rod 233, that is, the laser range finder 31 is connected with the connecting rod 233. In the embodiment, the connecting rod 233 is in a cross shape to enhance the stability of the connection with the ranging component 3. In the embodiment, the double support leg design can not only ensure the stability of the support of the ranging component 3, but also realize the rotational connection of the ranging component 3 with the moving component 2, so as to ensure the flexibility of the rotational adjustment and the stability of the adjustment process. The support legs 231 can be made of grooved or square steel and connected with the moving base 21 through angle steel. The rotational mounting mode of the positioning rollers 232 with the connecting rod 233 is a prior art, which will not be discussed herein. Under the action of external force, the connecting rod 233 can drive the ranging component 3 to rotate, that is, the setting angle of the laser range finder 31 can be adjusted, the distance between the measuring point and the non-perpendicular point can be measured, the flexibility and accuracy of the measurement can be improved, the measurement quality can be improved, and the device is convenient to use in various measurement environments. The moving component 2 also comprises an angle positioning assembly. The angle positioning assembly comprises a pointer 234 and an angle scale 235. In the embodiment, the angle scale 235 is arranged on the positioning roller 232, and the pointer 234 is arranged on the connecting rod 233 and can cooperate with the angle scale 235 to position the rotational angle of the ranging component 3. In other embodiments, the pointer 234 can be arranged on the positioning roller 232, and the angle scale 235 can be arranged on the connecting rod 233. The pointer 234 and the angle scale 235 can cooperate to position the rotational angle of the ranging component 3, so as to better improve the measurement accuracy and the measurement quality. In the embodiment, the support legs 231 are provided with marker pen holders 61 on the sides, so that the marker pens can be conveniently recorded and taken, and the measurement efficiency can be improved.

[0056] In the embodiment, the target plate 41 is rotationally connected with the fixing component, and the target plate 41 is provided with an identification and / or a perpendicularity detection assembly. In the embodiment, the target plate 41 is provided with an identification to cooperate with the ranging component 3 to measure, and is also provided with a perpendicularity detection assembly to detect the perpendicularity of the target plate 41.

[0057] In the embodiment, the mark includes a target center line 412 arranged on the target plate 41, and the laser can be projected on the target center line 412 during measurement to accurately measure; the mark also includes a target scale 413 arranged on the target plate 41, when the base surface is not horizontal, the laser is directed to the target center line 412 and the height difference is quickly measured through the target scale 413, which is convenient to operate, accurate to measure, improves the measurement efficiency and ensures the measurement quality. In the embodiment, the fixing seat 42 is provided with a centering line 422, the positioning line 422 is the projection line of the target center line 412 on the fixing seat 42 when the target plate 41 is perpendicular to the fixing seat 42, the design can indirectly extend the target center line 412, so that the laser is more convenient to correspond to the target center line 412, and the laser can correspond to the centering line 422 first and then be adjusted to correspond to the target center line 412, which is flexible to adjust and convenient to use. The target plate 41 is also provided with a perpendicularity detection assembly 411, the target plate 41 is rotationally connected with the fixing seat 42 and detects the perpendicularity through the perpendicularity detection assembly 411. The embodiment can better ensure the positioning accuracy of each component after adjustment, ensure the measurement accuracy and better improve the measurement quality.

[0058] In the embodiment, the target measuring mechanism 4 includes a target plate adjusting roller 414, the target plate 4 is rotationally connected with the fixing seat 42 through the target plate adjusting roller 414; the target plate mechanism 4 also includes a positioning plate 43 and a positioning plate adjusting roller 431, the positioning plate 43 is also rotationally connected with the fixing seat 42 through the positioning plate adjusting roller 431, and the positioning plate 43 is provided with a target plate embedding hole to be embedded with the target plate 41, that is, when the target plate 41 and the positioning plate 43 are adjusted to the same included angle with the fixing seat 42, the target plate 41 can be nested in the positioning plate 43. During measurement, the target plate 41 is usually adjusted to be perpendicular to the fixing seat 42, and the perpendicularity is ensured through the perpendicularity detection assembly 411 to ensure the measurement accuracy; the target plate 41 is also movably provided with a limiting piece 415, when the target plate 41 and the positioning plate 43 are adjusted to the same plane, the target plate 41 and the positioning plate 43 are connected into a whole through the limiting piece 415 to ensure the fixing stability. The target plate 41 and the positioning plate 43 are respectively rotationally connected with the fixing seat 42, so that during transportation or storage, the target plate 41 and the positioning plate 43 can be adjusted to be parallel to the fixing seat 42 to reduce the floor area, and the target plate 41 and the positioning plate 43 can be folded to be placed to facilitate storage or transportation; during circulation movement, the positioning plate 43 can also be rotated to serve as a handle to facilitate transportation.

[0059] The main use method of the utility model mainly includes the following use steps:

[0060] The target plate 41 is arranged at a measurement starting point and is fixed through a fixing component, the distance measuring component 3 can measure the distance from the target plate 41, the distance measuring component 3 is moved to adjust the distance through the moving component 2, and the position of the distance measuring component 3 is recorded to position when the distance adjustment is completed.

[0061] A specific working process of the embodiment is as follows:

[0062] The component measuring device can be transported in parts to the place to be measured, and then assembled and formed. The positioning plate 42 or the target plate 41 can be rotated during transportation to reduce the occupied space. The positioning plate 42 can also be used as a handle.

[0063] The I-beam component 1 is placed on the assembly platform, and the position of the fixing seat 42 on the web of the component 1 is adjusted: the second scale 82 is rotated to be perpendicular to the first scale 81, the first scale 81 and the second scale 82 are quickly positioned, the target plate 41 is perpendicular to the flange of the component 1, the distance between the target plate 41 and the edge of the component 1 is measured, the target plate 41 is positioned at the measurement starting point and is fixed by the magnetic assembly 421. The line end of the centering line 422 can also be used as the measurement starting point and the reference point, and the material is numbered on the web.

[0064] The target plate 41 is rotated, and the verticality of the target plate 41 is usually adjusted to be perpendicular to the fixing seat 42 and is detected by the verticality detection assembly 411. In other use scenarios, the target plate 41 can also be adjusted according to the needs.

[0065] The measuring mechanism is placed on the web, the angle of the laser range finder 31 is adjusted by the support frame 23, and whether the angle is accurate is detected by the angle positioning assembly. The position of the measuring mechanism can be further positioned by the corresponding angle ruler assembly in the same way as the position of the target plate 41 is positioned, so that the ranging part 3 is parallel to the target plate 41.

[0066] The movement of the roller 22 is adjusted by the controller 24, so that the measuring mechanism moves along the length direction of the component 1. The laser range finder 31 is turned on, and the emitted laser is adjusted to be projected on the target center line 412. The display panel 311 can display the distance from the measurement starting point during the movement. When the positioning position reaches the design requirement, the alarm part 7 can alarm and prompt, and the material is marked by the marking pen 62 to complete the numbering.

[0067] In different working scenarios, the target plate 41 can be used alone. It can be positioned and fixed at the measurement starting point position, and the construction personnel can use a steel tape to cooperate with positioning. In the construction scenario where a clear measurement starting point has been set, such as using the node plate 9 connected with the component 1 as the measurement starting point, the measuring mechanism can be used alone for positioning and numbering.

[0068] The embodiment can be used separately or combined, and can be flexibly applied to various measurement scenarios. It can reduce the number of workers, reduce measurement deviation, improve work efficiency, and reduce operation cost. It can improve the traditional length measurement and numbering by two people to single-person operation. The node plate 9 can be positioned during the component 1 measurement and numbering process. The length of the component 1 is re-measured after the component 1 is completed, to ensure that the length deviation meets the specification requirements. The device occupies a small space, the operation process is smoother, the work efficiency is improved, the construction period is shortened, the manufacturing cost is low, and the device is easy to disassemble and assemble. It can be used for multiple projects, which is convenient and fast.

[0069] Embodiment 2:

[0070] As Figures 10 to 12 In this embodiment, the measuring mechanism further comprises a hanging component 5, which is connectable with the moving component 2 and movably hung on the component 1, and the hanging component 5 comprises a hanging lug 51 connectable with the moving component 2 and a moving wheel 53 rotatably connected with the hanging lug 51, and the hanging lug 51 is movably hung on the component 1 through the moving wheel 53. In a specific embodiment, the hanging component 5 further comprises a connecting shaft 52 and a connecting assembly 54, the hanging lug 51 is detachably connected with the moving seat 21 through the connecting assembly 54, and the moving wheel 53 is rotatably arranged on the hanging lug 51 through the connecting shaft 52, and the hanging lug 51 is movably hung on the component 1 through the moving wheel 53 to movably arrange the moving seat 21 on the side of the component 1. In this embodiment, the connecting assembly 54 comprises a connecting plate connected with the hanging lug 51 and provided with a connecting hole, and the connecting hole is detachably connected with the moving seat 21 through a bolt; in other embodiments, the detachable connection mode can also be flexibly selected based on the common technical knowledge of those skilled in the art.

[0071] This embodiment can be applied to measure the side vertical surface of the component 1, such as measuring and marking the outer side of the flange plate. The target plate 41 is fixedly arranged on the side of the component 1 by the magnetic force of the fixing seat 42, the measuring mechanism is movably hung on the side of the component 1 through the hanging component 5, and the measuring mechanism cooperates with the target measuring mechanism 4 to quickly measure and mark the outer side of the side vertical surface of the component 1.

[0072] The device of the utility model has the advantages of simple manufacture, low cost, assembly type, convenient disassembly and assembly, turnover and exchange, simultaneous completion of the length direction measurement and marking of the long component 1, and measurement on the outer side of the side vertical surface of the component 1, reduced use of large machinery, shortened installation operation time, improved operation safety factor, energy saving and consumption reduction.

[0073] The embodiments of the utility model are described in detail above, but the content described can only be the preferred embodiments of the utility model and cannot be considered to limit the implementation range of the utility model. Any equivalent changes and improvements within the scope of the utility model application should still belong to the patent coverage range of the utility model.

Claims

1. A member measuring device characterized by comprising: The utility model relates to a measuring device, comprising: a target plate and a fixing component connected with the target plate to be fixed on the component; a measuring mechanism comprising a moving component movably arranged on the component and a distance measuring component connected with the moving component to measure.

2. The construction element measuring device according to claim 1, characterized in that: The fixing component comprises a fixing seat connected with the target plate, and the fixing seat is provided with at least one magnetic force assembly for fixation.

3. The construction element measuring device according to claim 1, characterized in that: The moving component comprises a moving seat connected with the distance measuring component, and the moving seat is provided with at least one roller.

4. The construction element measuring device according to claim 1, characterized in that: The measuring mechanism further comprises a marking component connected with the moving component to mark the position.

5. The construction element measuring device according to claim 1, characterized in that: The measuring mechanism further comprises an alarm component connected with the moving component, which can receive the measurement result of the distance measuring component to prompt.

6. The construction element measuring device according to claim 1, characterized in that: Further comprising at least one angle ruler assembly, at least one of the fixing component and the moving component is provided with the angle ruler assembly to position.

7. The construction element measuring device according to claim 1, characterized in that: The distance measuring component is rotationally connected with the moving component.

8. The construction element measuring device according to claim 1, characterized in that: The target plate is rotationally connected with the fixing component.

9. The construction element measuring device according to claim 8, characterized in that: The target plate is provided with an identification and / or perpendicularity detection assembly.

10. The object measurement apparatus according to any one of claims 1 to 9, wherein: The measuring mechanism further comprises a suspension component, which comprises a hanging ear connectable with the moving component and a moving wheel rotationally connected with the hanging ear, and the hanging ear is movably hung on the component through the moving wheel.

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