CN212254065U - Double-sided deformation amount detection device - Google Patents
Double-sided deformation amount detection device Download PDFInfo
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- CN212254065U CN212254065U CN202020819942.3U CN202020819942U CN212254065U CN 212254065 U CN212254065 U CN 212254065U CN 202020819942 U CN202020819942 U CN 202020819942U CN 212254065 U CN212254065 U CN 212254065U
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Abstract
The utility model provides a two-sided deflection detection device. The double-sided deformation amount detection device can realize detection of deformation amounts of double sides of a measured object, and comprises a first displacement sensor, a second displacement sensor, a connecting plate and a lever assembly, wherein the first displacement sensor and the second displacement sensor are fixed on the connecting plate, the lever assembly is installed on the connecting plate, the top surface of the first displacement sensor is abutted to a resistance action point of the lever assembly, the power action point of the lever assembly is abutted to a first side surface of the measured object, the first displacement sensor is used for detecting the deformation amount of the first side surface of the measured object through displacement of the resistance action point, and the top surface of the second displacement sensor is abutted to a second side surface of the measured object so as to detect the deformation amount of the second side surface of the measured object.
Description
Technical Field
The utility model relates to a braking system's of vehicle mechanical structure especially relates to a can carry out two-sided deflection detection device that detects to the deflection of the two-sided of testee.
Background
The rotating element in a friction pair of a disc brake is a metal disc working with end faces, called a brake disc. The friction elements then clamp the brake disc from both sides of the brake disc to produce braking. The disc brake has the advantages of fast heat dissipation, light weight, compact structure, high temperature resistance, stable braking effect, fast braking response and the like.
Disc brakes are currently widely used on passenger vehicles. However, after a strong braking, the brake disc may be slightly deformed, which may not only affect the braking performance, but also cause braking noise, which may affect the safety and comfort of the entire vehicle. In the prior art, a deformation amount detection device is mostly adopted to detect the deformation amount of one surface of a brake disc.
However, since the disc brake is operated, the brake pad and the two side surfaces of the brake disc rub at the same time, so that the deformation amounts of the two sides of the brake disc are different, and the whole deformation amount of the brake disc cannot be completely reflected by detecting the deformation amount of one side of the brake disc. And the deformation amount of the brake disc is very small, so that certain requirements are also made on the precision of the detection device.
In order to solve the above problem, the utility model aims at providing a two-sided deflection detection device can be used to detect the two side deflection of brake disc simultaneously.
SUMMERY OF THE UTILITY MODEL
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
According to the utility model discloses an aspect provides a two-sided deflection detection device, include: first displacement sensor, second displacement sensor, connecting plate and lever subassembly, first displacement sensor with second displacement sensor fixes on the connecting plate, the lever subassembly is installed on the connecting plate, first displacement sensor's top surface with the resistance action point butt of lever subassembly, the power action point of lever subassembly with the first side butt of testee, first displacement sensor is through detecting the displacement of resistance action point is in order to detect the deflection of the first side of testee, second displacement sensor's top surface with the second side butt of testee is in order to detect the deflection of the second side of testee. In one embodiment, the lever assembly includes a lever arm and a push rod, the push rod is fixedly connected to the connecting plate, a fulcrum, a resistance acting point and a power acting point of the lever assembly are located on the lever arm, and the fulcrum is fixedly connected to the push rod to mount the lever assembly on the connecting plate.
In one embodiment, a through hole is arranged at a fulcrum of the lever arm, a mounting hole is arranged at one end of the ejector rod, and the fulcrum is fixedly connected with the ejector rod through a pin penetrating through the through hole and the mounting hole.
In one embodiment, the top surface of the first displacement sensor is in point contact with the resistance force application point of the lever assembly, the power application point of the lever assembly is in point contact with the first side surface of the object to be measured, and the top surface of the second displacement sensor is in point contact with the second side surface of the object to be measured.
In one embodiment, the resistance acting point and the power acting point are respectively provided with a measuring ball, and the top surface of the first displacement sensor and the resistance acting point and the power acting point and the first side surface of the measured object are respectively contacted through the measuring ball points.
In one embodiment, the top surface of the second displacement sensor includes a tip portion that is in point contact with the second side surface of the object to be measured.
In one embodiment, the distance between the fulcrum and the point of action of the motive force is equal to the distance between the fulcrum and the point of action of the resistance force.
In one embodiment, the first and second displacement sensors are hydraulic displacement sensors, each hydraulic displacement sensor comprising: a cavity, a piston rod, a spring, a top surface, a flow sensor, a conduit and a liquid storage tank, wherein the first end of the piston rod is fixedly connected with the inner side of the top surface, the second end of the piston rod penetrates through the first end of the cavity and is positioned in the cavity, and the second end of the piston rod, the side wall of the cavity and the second end of the cavity form a hydraulic space for loading hydraulic oil, the spring is sleeved on the piston rod and respectively abutted against the first end of the cavity and the inner side of the top surface, the hydraulic space is communicated with the liquid storage tank through the flow sensor and the conduit, the flow sensor is used for detecting the volume change of the hydraulic oil flowing through the flow sensor, the outer side of the top surface of the first displacement sensor is in contact with the resistance acting point of the lever assembly, the outer side of the top surface of the second displacement sensor is in contact with the second side surface of the object to be measured.
In one embodiment, the first displacement sensor and the second displacement sensor share the same fluid reservoir.
In one embodiment, the connecting plate includes a plurality of mounting slots and a plurality of threaded holes corresponding to the mounting slots, and the cavity of the first displacement sensor, the cavity of the second displacement sensor, and the lever assembly pass through the mounting slots and are fixed to the connecting plate by screws passing through the corresponding threaded holes.
The utility model has simple structure, and realizes the detection of the deformation of the two sides of the brake disc through the lever component and the two displacement sensors; the detection precision of the deformation is improved by adopting the hydraulic displacement sensor; the displacement sensor and the deformation detection point thereof realize point contact through the arrangement of the measuring ball or the top tip part, so that the problem of different deformation of the contact surface can be prevented; the measuring ball made of hard alloy materials can prevent the measuring ball from deforming in the measuring process so as to influence the accuracy of the measuring result; the fulcrum is arranged between the power action point and the resistance action point, so that the displacement of the resistance action point is equal to that of the power action point, and the calculation process of the detection result is simplified; the first displacement sensor and the second displacement sensor share the same liquid storage tank, so that the number of devices is reduced, and the structure of the device is simplified; through with first displacement sensor's cavity the second displacement sensor's cavity and lever assembly passes a plurality of mounting grooves of connecting plate respectively, realized first displacement sensor, second displacement sensor and lever assembly's position is adjustable to can realize the detection and simple to operate to the not unidimensional testee.
Drawings
The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings.
Fig. 1 is a schematic structural view of a double-sided deformation amount detection device according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a first displacement sensor in one embodiment according to an aspect of the present invention;
fig. 3 is a schematic structural view of a second displacement sensor in one embodiment according to an aspect of the present invention;
FIG. 4 is a schematic structural view of a lever arm in one embodiment according to one aspect of the present invention;
fig. 5 is a schematic structural view of a jack in an embodiment according to an aspect of the present invention;
fig. 6 is a schematic structural view of a pin in an embodiment according to an aspect of the present invention;
fig. 7 is a schematic structural diagram of a connection plate in an embodiment according to an aspect of the present invention.
For clarity, a brief description of the reference numerals is given below:
10 first displacement sensor
11 cavity
111 side wall of the chamber 11
112 first end face of the chamber 11
113 second end face of the cavity 11
12 piston rod
121 first end of piston rod 12
122 second end of piston rod 12
13 spring
14 top surface
141 top of the top surface 14
142 top surface 14 mounting portion
15 flow sensor
16 hydraulic space
17 catheter
18 liquid storage tank
20 second displacement sensor
24 top surface of the second displacement sensor 20
241 the tip of the top surface 24
242 mounting portion for top surface 24
27 catheter of the second displacement sensor 20
30 connecting plate
31 mounting groove
311 mounting groove of the first displacement sensor 10
312 mounting groove of ejector rod 42
313 mounting groove of the second displacement sensor 20
32 screw hole
33 mounting port
34 opening
35 screw
40 lever assembly
41 lever arm
411 through hole
412 measuring ball
42 ejector pin
421 side wall of the push rod 42
422 mandril 42 mounting hole
43 Pin
431 through hole of dowel 43
50 object to be measured
Detailed Description
The following description is presented to enable any person skilled in the art to make and use the invention and is incorporated in the context of a particular application. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to a wide range of embodiments. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In the following detailed description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the practice of the invention may not necessarily be limited to these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present invention.
The reader's attention is directed to all papers and documents which are filed concurrently with this specification and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference. All the features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
Note that where used, the designations first, second, left, right, front, back, top, bottom, positive, negative, clockwise, and counterclockwise are used merely for convenience and do not imply any particular fixed orientation. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is noted that, where used, further, preferably, still further and more preferably is a brief introduction to the exposition of the alternative embodiment on the basis of the preceding embodiment, the contents of the further, preferably, still further or more preferably back band being combined with the preceding embodiment as a complete constituent of the alternative embodiment. Several further, preferred, still further or more preferred arrangements of the belt after the same embodiment may be combined in any combination to form a further embodiment.
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be understood as imposing any limitation on the scope of the present invention.
According to the utility model discloses an aspect provides a two-sided deflection detection device for realize the detection to the deflection of two sides of testee.
In one embodiment, as shown in fig. 1, the double-sided deformation amount detecting device may include a first displacement sensor 10, a second displacement sensor 20, a connecting plate 30, and a lever assembly 40.
The first displacement sensor 10 and the second displacement sensor 20 are used to detect the amount of deformation of both side surfaces of the object 50 to be measured, respectively. The first side and the second side are used to distinguish the two sides of the object 50 to be measured. It is understood that the first side surface and the second side surface are two surfaces of the object to be measured, such as two side surfaces of the brake disc contacting the friction element, which are deformed.
The lever assembly 40 includes a power point of action, a resistance point of action, and a fulcrum, the power point of action being forced to drive the resistance point of action to rotate about the fulcrum. Wherein, the top surface of the first displacement sensor 10 is abutted with the resistance action point of the lever assembly 40, and the power action point of the lever assembly 40 is abutted with the first side surface of the object to be measured 50. Abutting means that a pressing force exists between two objects in contact with each other, and one of the two objects moves along with the other object under the action of the pressing force. Therefore, when the first side surface of the object to be measured 50 is deformed, the pressing force between the dynamic acting point and the first side surface of the object to be measured 50 moves the dynamic acting point along with the deformation of the first side surface of the object to be measured 50, and drives the resistance acting point to rotate around the fulcrum to generate corresponding displacement. The first displacement sensor 10 detects the displacement of the point of action of resistance by recognizing the displacement of the top surface. Because the displacement of the dynamic action point of the lever assembly 40 and the displacement of the resistance action point have a corresponding relationship, the displacement of the dynamic action point, that is, the deformation of the first side surface of the measured object can be determined based on the displacement of the resistance action point.
The connecting plate 30 is used to fix the first displacement sensor 10, the second displacement sensor 20 and the lever assembly 40. The abutment of the top surface of the first displacement sensor 10 with the resistance acting point of the lever assembly 40, the abutment of the power acting point of the lever assembly 40 with the first side surface of the object to be measured 50, and the abutment of the top surface of the second displacement sensor 20 with the second side surface of the object to be measured 50 can be achieved by adjusting the fixing positions of the connecting plate 30 with the first displacement sensor 10, the second displacement sensor 20, and the lever assembly 40.
In order to improve the detection accuracy of the deformation amount, preferably, a hydraulic displacement sensor may be used. The structure and principle of the hydraulic displacement sensor will be briefly described by taking the structure diagram of the first displacement sensor shown in fig. 2 as an example.
The first displacement sensor 10 includes a chamber 11, as shown in fig. 2, a piston rod 12, a spring 13, a top surface 14, a flow sensor 15, and a conduit 17 and reservoir 18, as shown in fig. 1.
The cavity 11 may be divided into an outer body and an inner hollow space, and the outer body may be divided into a sidewall 111, a first end surface 112 and a second end surface 113.
The body of the piston rod 12 is a rod-like structure having two ends, respectively referred to as a first end 121 and a second end 122. The first end 121 of the piston rod 12 is fixedly connected to the inside of the top surface 14 to move with the movement of the top surface. The rod-like structure passes through the first end face 112 of the cavity 11 such that the second end 122 is located inside the cavity 11. The end surface of the second end 122 has the same shape and size as the cross section of the sidewall 111 of the cavity 11 and is perpendicular to the sidewall 111 of the cavity 11. The end surface of the second end 122 and the side wall 111 and the second end surface 113 of the chamber 11 thus form a hydraulic space 16, and the hydraulic space 16 is used for loading hydraulic oil. As the top surface 14 moves toward the outside (inside) thereof, the piston rod 12 moves toward the first end 121 (or the second end 122) in the axial direction of the rod-like structure, and the volume of the hydraulic space 16 becomes larger (or smaller) accordingly.
The spring 13 is sleeved on the piston rod 12 located outside the cavity 11, and two ends of the spring 13 respectively abut against the inner sides of the first end surface 112 and the top surface 121 of the cavity 11. The spring 13 ensures that the top surface 14 is always in contact with the object to be measured directly.
The flow sensor 15 communicates with the hydraulic space 16 through a second end 113 of the chamber. The flow sensor 15 is also in communication with a reservoir 18 via a conduit 17. I.e. the hydraulic space 16 may be in communication with the reservoir 18 via the flow sensor 15 and the conduit 17.
The reservoir 18 stores hydraulic oil therein. When the volume of the hydraulic space 16 becomes larger, the hydraulic oil in the reservoir 18 flows into the hydraulic space 16 through the flow sensor 15; when the volume of the hydraulic space 16 becomes small, the hydraulic oil in the hydraulic space 16 flows into the reservoir tank 18 through the flow sensor 15. The flow sensor 15 detects the volume change of the hydraulic oil flowing therethrough.
Preferably, the reservoirs of the first displacement sensor 10 and the second displacement sensor 20 may be shared in order to simplify the structure of the double-sided deformation amount detecting apparatus. In one embodiment, shown in FIG. 1, the conduit 27 of the second displacement sensor 20 and the conduit 17 of the first sensor 10 are both in communication with the reservoir 18.
The outside of the top surface 14 is in contact with the object to be tested which it is directly sensing. As shown in fig. 1, the top surface of the first displacement sensor 10 is in contact with the resistance acting point of the object to be measured, i.e., the lever assembly, which is directly detected by the first displacement sensor, and the top surface of the second displacement sensor 20 is in contact with the second side surface of the object to be measured, i.e., the object to be measured 50, which is directly detected by the second displacement sensor.
It will be appreciated that the second displacement sensor has a similar construction to the first displacement sensor, and the measurement principle is the same. The second displacement sensor may be the same or different in size and shape from the first displacement sensor. As shown in fig. 3 for the second displacement sensor, the assembly piston rod, the chamber, the spring and the flow sensor are all the same in construction and shape as the corresponding components of the first displacement sensor, but have a top surface 24 with a different shape than the top surface 14 of the first displacement sensor. Therefore, the structure of the displacement sensor is not limited to the structure shown in fig. 1, 2, or 3.
In the actual application process, the data acquisition device can acquire the volume change measured by the flow sensors of the first displacement sensor 10 and the second displacement sensor 20, and then calculate the deformation of the first side surface and the second side surface of the object to be measured based on the volume change.
Specifically, if the volume change of the hydraulic oil in the hydraulic space measured by a flow sensor is V and the diameter of the end surface of the second end of the piston rod is D, the cross-sectional area of the cavity is V
Correspondingly, the flow sensor directly detects the displacement of the measured point of the measured object
The object to be measured directly detected by the second displacement sensor 20, i.e. theIs the object to be measured 50, and thus the amount of deformation of the second side of the object to be measured 50 is the amount of deformation
Wherein V is the volume change of the hydraulic oil measured by the flow sensor of the second displacement sensor 20, and D is the diameter of the second end surface of the piston rod of the second displacement sensor 20.
Since the object to be detected directly by the first displacement sensor 10 is the resistance action point of the lever assembly 40, the displacement l of the power action point corresponding to the displacement of the resistance action point can be determined according to the lever principle2. Preferably, for ease of calculation, the distance between the fulcrum of the lever assembly 40 and the power point may be equal to the distance between the fulcrum and the resistance point, i.e. the power arm in the lever is equal to the resistance arm, and the displacement l of the power point is then equal to2Equal to the displacement of the point of action of the resistance1. That is, when the distance between the fulcrum of the lever assembly 40 and the power action point is equal to the distance between the fulcrum and the resistance action point, the deformation of the first side surface of the object to be measured 50 is also
Wherein V is the volume change of the hydraulic oil measured by the flow sensor of the first displacement sensor 10, and D is the diameter of the second end surface of the piston rod of the first displacement sensor 10.
In one embodiment, the lever assembly 40 includes a lever arm 41 and a push rod 42. The push rod 42 is fixedly connected with the connecting plate 30, the fulcrum, the resistance action point and the power action point of the lever assembly 40 are positioned on the lever arm 41, and the lever arm 41 is fixedly connected with the push rod 42. The fixed connection point of the lever arm 41 and the push rod 42 is the fulcrum of the lever assembly 40, i.e. the fulcrum on the lever arm 41 is fixedly connected with the push rod 42, so that the fulcrum of the lever assembly 40 is stationary relative to the connecting plate 30.
Further, the lever arm 41 and the stem 42 may be configured as shown in fig. 4 and 5, respectively.
As shown in fig. 4, a through hole 411 is provided at the fulcrum of the lever arm 41.
As shown in fig. 5, the end of the push rod 42 for fixing with the fulcrum is provided with a groove, which is formed by two opposite side walls 421, and the distance between the side walls 421 can be slightly larger than the thickness of the lever arm 41 so as to clamp the lever arm 41 between the two side walls 421. The side wall 421 is provided with a mounting hole 422 corresponding to the through hole 411. When fixed, as shown in fig. 1, the fulcrum and the stem 42 can be fixed by the pin 43 passing through the mounting hole 422 of the stem 42 and the through hole 411 of the lever arm 41.
Further, the pin 43 may have a through hole 431 at the top as shown in FIG. 6. After the pin 43 passes through the mounting hole 422 of the jack 42 and the through hole 411 of the lever arm 41, the pin 43 can be prevented from falling out by inserting a latch into the through hole 431.
Furthermore, the problem that different position deformation amounts may exist in the contact surface between the object to be measured and each displacement sensor, and the problem that the deformation amount detection result is inaccurate may occur during detection. Therefore, preferably, the top surface of the first displacement sensor 10 is in point contact with the resistance operating point of the lever assembly 40, the power operating point of the lever assembly 40 is in point contact with the first side surface of the object to be measured 50, and the top surface of the second displacement sensor 20 is in point contact with the second side surface of the object to be measured 50. Thereby preventing the problem of uneven deformation caused by surface contact.
Since the top of the second displacement sensor is in direct contact with the second side of the object to be measured, a top surface structure as shown in fig. 3 may be employed. As shown in fig. 3, the top surface 24 of the second displacement sensor 20 has a pointed portion 241. The apex 241 has a shape similar to a cone, the apex of which is in contact with the second side of the object to be measured 50, thereby achieving point contact of the top surface of the second displacement sensor with the second side of the object to be measured 50.
Since the top surface 14 of the first displacement sensor 10 is in contact with the resistance acting point of the lever assembly 40, and the power acting point of the lever assembly 40 is in contact with the first side surface of the object to be measured 50, the resistance acting point and the power acting point of the lever assembly 40 may be provided with measuring balls to realize point contact.
In one embodiment, as shown in fig. 4, the lever arm 41 of the lever assembly 40 has measuring balls 412 respectively mounted at both ends thereof, and the two measuring balls 412 respectively serve as a power acting point and a resistance acting point.
Correspondingly, to facilitate contact of the top surface 14 of the first displacement sensor 10 with the measuring ball 412 at the point of resistance action, the top portion 141 of the top surface 14 may be provided as a disk-like structure.
Preferably, in order to prevent the measuring ball from deforming or losing during long-term use and influencing the accuracy of the measuring result, a hard alloy material can be adopted.
For the installation, it is preferable, in the utility model, the fixed connection can adopt a detachable fixed connection mode.
For example, the top surface 14 of the first displacement sensor 10 may have a mounting portion 142 for fixed connection with the piston rod 12, the mounting portion 142 having an internal thread, the first end 121 of the piston rod 12 having a corresponding external thread, the mounting portion 142 being fixedly connected with the first end 121 by a threaded structure.
Correspondingly, the top surface 24 of the second displacement sensor 20 may have a mounting portion 242 for fixed connection with the piston rod of the second displacement sensor 20, the mounting portion 242 having an internal thread, the first end of the piston rod of the second displacement sensor 20 having a corresponding external thread, the mounting portion 242 being fixedly connected with the first end of the piston rod of the second displacement sensor 20 by a threaded structure.
For example, the connecting plate 30 and the first and second displacement sensors 10 and 20 and the lever assembly 40 may be fixedly connected by a bolt structure. More preferably, to facilitate the installation, as shown in fig. 7, the connection plate 30 may be provided with a plurality of installation grooves 31 and a screw hole 32 corresponding to each installation groove. During installation, the first displacement sensor 10, the second displacement sensor 20 and the push rod 42 of the lever assembly 40 are respectively inserted into the corresponding installation grooves 31, and after being adjusted to proper positions, the screws 35 are inserted into the corresponding threaded holes 32 to fix the corresponding assemblies.
Preferably, the mounting groove 311 shown in fig. 7 is used for mounting the first displacement sensor 10, the mounting groove 312 is used for mounting the lever assembly 40, and the mounting groove 313 is used for mounting the second displacement sensor 20, based on the mounting positions of the first displacement sensor 10, the second displacement sensor 20, and the lever assembly 40 shown in fig. 1. Correspondingly, the mounting grooves 311, 312, and 313 have the same sectional shapes as the cavities of the first displacement sensor 10, the lever assembly 40, the ejector pin 42, and the second displacement sensor 20, respectively.
The lower portion of the connecting plate 30 further includes a mounting opening 33 for fixing to a corresponding part of the vehicle to fix the first and second displacement sensors 10 and 20 and the lever assembly 40.
To achieve an adjustable size of the mounting groove and a secure fastening of the mounting object, the mounting groove may be provided as a not completely closed slot, i.e. with an opening 34 as shown in fig. 7. Taking the mounting groove 311 as an example, after the first displacement sensor 10 is inserted into the mounting groove 311, the screw 35 is tightened in the screw hole 31 corresponding to the opening 31 to reduce the opening 34, thereby fastening the first displacement sensor 10.
The installation of the double-sided deformation amount detection device is simple, and the installation process of the double-sided deformation amount detection device is briefly explained by taking the specific double-sided deformation amount detection device shown in fig. 1 as an example.
First, the attachment plate 30 is fixed to the stage through the attachment opening 33, the first displacement sensor 10 and the second displacement sensor 20 are respectively mounted in the mounting groove 311 and the mounting groove 313 of the attachment plate 30, and the screws 35 are screwed into the screw holes 32, thereby fixing the two displacement sensors. The tip portion 241 of the second displacement sensor 20 is in contact with the second side surface of the brake disc to directly measure the amount of deformation of the second side surface of the brake disc.
Next, the flow sensor of the second displacement sensor 20 is interconnected to the reservoir 18 via conduit 27. When the piston rod is compressed (or extended), the volume of the hydraulic space formed by the cavity of the second displacement sensor 20 and the piston rod is reduced (or increased), hydraulic oil flows into (or flows out of) the reservoir 18 through the flow sensor and the conduit 27, and the flow sensor can measure the volume change of the flowing hydraulic oil, so as to calculate the displacement of the piston rod, i.e. the deformation of the second side surface of the brake disc.
The flow sensor 15 of the first displacement sensor 10 is then interconnected to the reservoir 18 by a conduit 17. When the piston rod 12 is compressed (or extended), the volume of the hydraulic space 16 formed by the cavity 11 of the first displacement sensor 10 and the piston rod 12 is reduced (or increased), hydraulic oil flows into (or flows out of) the reservoir 18 through the flow sensor 15 and the conduit 17, and the flow sensor 15 can measure the volume change of the flowing hydraulic oil, so as to calculate the displacement of the piston rod 12, i.e. the displacement of the measuring ball 412 of the lever arm 41.
Subsequently, the carrier rod 42 is installed in the installation groove 312 of the connection plate 30, the lever arm 41 is installed on the carrier rod 42 through the pin 43, and the position of the carrier rod 42 is adjusted so that the measuring balls 412 at both ends of the lever arm 41 are respectively in contact with the top surface 14 of the first displacement sensor 10 and the first side surface of the brake disc, because both sides of the lever arm 41 are equal in length, the displacement amounts of the measuring balls 412 at both ends of the lever arm 41 are the same, and the displacement sensor 10 can indirectly measure the deformation amount of the right side surface of the brake disc.
Finally, the jack rod 42 is fixed by tightening the screw 35. Thus, the deformation of the two side surfaces of the brake disc can be measured simultaneously when the brake disc is rotated.
It is to be understood that the specific installation process is not limited to the above, and other installation sequences may be adopted on the premise that the installation position relationship among the components can be realized.
The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. It is to be understood that the scope of the invention is to be defined by the appended claims and not by the specific constructions and components of the embodiments illustrated above. Those skilled in the art can make various changes and modifications to the embodiments within the spirit and scope of the present invention, and such changes and modifications also fall within the scope of the present invention.
Claims (10)
1. A double-sided deformation amount detection device is characterized by comprising:
first displacement sensor, second displacement sensor, connecting plate and lever assembly, first displacement sensor with second displacement sensor fixes on the connecting plate, the lever assembly is installed on the connecting plate, first displacement sensor's top surface with the resistance action point butt of lever assembly, the power action point of lever assembly and the first side butt of testee, first displacement sensor is through detecting the displacement of resistance action point is with the deflection that detects the first side of testee, second displacement sensor's top surface with the second side butt of testee is with the detection the deflection of the second side of testee.
2. The double-sided deformation amount detecting device according to claim 1, wherein the lever assembly includes a lever arm and a push rod, the push rod is fixedly connected to the connecting plate, a fulcrum, a resistance acting point and a power acting point of the lever assembly are located on the lever arm, and the fulcrum is fixedly connected to the push rod to mount the lever assembly on the connecting plate.
3. The double-sided deformation amount detecting device according to claim 2, wherein a through hole is provided at a fulcrum of the lever arm, a mounting hole is provided at one end of the push rod, and the fulcrum and the push rod are fixedly connected by a pin passing through the through hole and the mounting hole.
4. The double-sided deformation amount detecting device according to claim 1, wherein a top surface of the first displacement sensor is in point contact with the resistance acting point of the lever assembly, a power acting point of the lever assembly is in point contact with the first side surface of the object to be measured, and a top surface of the second displacement sensor is in point contact with the second side surface of the object to be measured.
5. The double-sided deformation amount detection device according to claim 4, wherein the resistance acting point and the power acting point are respectively provided with a measuring ball, and a top surface of the first displacement sensor and the resistance acting point and a first side surface of the object to be measured are respectively in point contact via the measuring balls.
6. The double-sided deformation amount detecting device according to claim 4, wherein the top surface of the second displacement sensor includes a tip portion that is in point contact with the second side surface of the object to be measured.
7. The double-sided deformation amount detection device according to any one of claims 1 to 6, wherein a distance between a fulcrum of the lever assembly and the power action point is equal to a distance between the fulcrum and the resistance action point.
8. The double-sided deformation amount detection device according to any one of claims 1 to 6, wherein the first displacement sensor and the second displacement sensor are hydraulic displacement sensors, each of which includes: a cavity, a piston rod, a spring, a top surface, a flow sensor, a conduit and a liquid storage tank, wherein the first end of the piston rod is fixedly connected with the inner side of the top surface, the second end of the piston rod penetrates through the first end of the cavity and is positioned in the cavity, and the second end of the piston rod, the side wall of the cavity and the second end of the cavity form a hydraulic space for loading hydraulic oil, the spring is sleeved on the piston rod and respectively abutted against the first end of the cavity and the inner side of the top surface, the hydraulic space is communicated with the liquid storage tank through the flow sensor and the conduit, the flow sensor is used for detecting the volume change of the hydraulic oil flowing through the flow sensor, the outer side of the top surface of the first displacement sensor is in contact with the resistance acting point of the lever assembly, the outer side of the top surface of the second displacement sensor is in contact with the second side surface of the object to be measured.
9. The double-sided deformation amount detection device according to claim 8, wherein the first displacement sensor and the second displacement sensor share the same reservoir tank.
10. The double-sided deformation amount detecting device according to claim 8, wherein the connecting plate includes a plurality of mounting grooves and a plurality of screw holes corresponding to the plurality of mounting grooves, and the cavity of the first displacement sensor, the cavity of the second displacement sensor, and the lever assembly pass through the plurality of mounting grooves and are fixed to the connecting plate by screws passing through the corresponding screw holes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116519243A (en) * | 2023-03-27 | 2023-08-01 | 盐城工学院 | Friction vibration test bed of generator braking system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116519243A (en) * | 2023-03-27 | 2023-08-01 | 盐城工学院 | Friction vibration test bed of generator braking system |
| CN116519243B (en) * | 2023-03-27 | 2024-03-19 | 盐城工学院 | Friction vibration test bed of generator braking system |
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