CN114563147A - Rigidity measuring device and system for annular elastic piece - Google Patents
Rigidity measuring device and system for annular elastic piece Download PDFInfo
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- CN114563147A CN114563147A CN202210204467.2A CN202210204467A CN114563147A CN 114563147 A CN114563147 A CN 114563147A CN 202210204467 A CN202210204467 A CN 202210204467A CN 114563147 A CN114563147 A CN 114563147A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The invention relates to a rigidity measuring device and a rigidity measuring system of an annular elastic part, wherein the measuring device comprises a workbench, guide seats are uniformly distributed on the circumference of the workbench, a sliding base body is assembled on the guide seats, a force transmission arm is arranged on the sliding base body, a pushing structure and/or a drawing structure are/is arranged on the force transmission arm; at least one sliding base body is provided with a force sensor, and a corresponding force transmission arm is connected to the force sensor; the rotary table is provided with a driving groove, the driving groove extends obliquely and is provided with a near end close to the axis of the rotary table and a far end far away from the axis of the rotary table, the sliding base body is provided with a guide piece matched with the driving groove, and the guide piece is used for driving each sliding base body to move synchronously when the rotary table rotates; the device also comprises a driving device for driving the turntable to rotate for a set angle, or a displacement detection device for detecting the displacement of the sliding base body or the force transmission arm. The invention effectively solves the problem that the rigidity of annular elastic parts such as annular springs and the like can not be directly measured in the prior art.
Description
Technical Field
The invention belongs to the technical field of elastic member rigidity measurement, and particularly relates to a rigidity measuring device and a rigidity measuring system for an annular elastic member.
Background
The overrunning clutch can realize power transmission and separation between transmission shafts and mainly comprises a roller type overrunning clutch and a wedge type overrunning clutch, wherein the wedge type overrunning clutch comprises a non-contact cam one-way clutch disclosed in the Chinese utility model patent specification with the authorization notice number of CN2809322Y and a wedge centrifugal overrunning clutch disclosed in the Chinese utility model patent with the authorization notice number of CN 204716812U.
The clutches of the above two patent documents are a typical wedge centrifugal overrunning clutch, which includes an outer race, an inner race, a wedge, and a ring spring, wherein the wedge is disposed between the inner race and the outer race, a distance between the inner race and the outer race is smaller than a long diameter of the wedge and larger than a short diameter of the wedge, and the ring spring is disposed between the inner race and a fulcrum of a cam. The annular spring is an important element of the wedge block centrifugal overrunning clutch, the radial outward spring force of the annular spring can enable the cam to deflect through a fulcrum acting on the cam, the two ends of the cam in the long diameter direction are in friction contact with the inner ring and the outer ring respectively, and meanwhile the spring force of the annular spring also directly influences the friction torque when the overrunning clutch operates in an overrunning mode. Therefore, according to the using condition of the overrunning clutch, in order to obtain a qualified friction torque value of the overrunning clutch, when the size parameter of the annular spring is determined, whether the performance of the annular spring meets the requirement can be judged by measuring the radial compression or tension stiffness of the annular spring.
At present, no method for measuring the rigidity of the spiral spring exists, and in the prior art, the size parameter of each annular spring is usually adjusted by measuring the friction torque value of the overrunning clutch so as to ensure that the overrunning clutch has an acceptable friction torque value during operation. However, this method is not suitable for mass production of the ring spring because of its low efficiency.
Disclosure of Invention
The invention aims to provide a rigidity measuring device for an annular elastic part, which aims to solve the problem that the rigidity of the annular elastic part such as an annular spring and the like can not be directly measured in the prior art; it is also an object of the present invention to provide a measuring system to solve the above problems.
In order to achieve the purpose, the rigidity measuring device of the annular elastic part adopts the following technical scheme:
a rigidity measuring device for an annular elastic part comprises a workbench, wherein guide seats which are uniformly distributed on the circumference are arranged on the top surface of the workbench, the guide seats are used for guiding and assembling corresponding sliding matrixes, and the guiding direction of the sliding matrixes on the guide seats is consistent with the radial direction of a distribution circle corresponding to the guide seats; the sliding base body is provided with a transmission arm, the transmission arm is provided with a pushing structure for pushing the annular elastic piece to be tested, the pushing structure on each transmission arm is positioned on the same circumference, and/or the transmission arm is provided with a traction structure for drawing the annular elastic piece to be tested, and the traction structure on each transmission arm is positioned on the same circumference; at least one sliding base body is provided with a force sensor, a corresponding force transmission arm is connected to the force sensor, and the force sensor is used for measuring the pushing force or the pulling force applied by the force transmission arm to the annular elastic piece to be measured; the rigidity measuring device of the annular elastic part also comprises a turntable which is coaxially arranged with the distribution circle of the guide seat, the turntable is provided with driving grooves which are in one-to-one correspondence with the sliding base bodies, each driving groove extends obliquely and is provided with a near end close to the axis of the turntable and a far end far away from the axis of the turntable, the sliding base bodies are provided with guide parts which are in guide fit with the corresponding driving grooves, and the guide parts are used for driving the sliding base bodies to synchronously move along the radial direction of the turntable when the turntable rotates; the rigidity measuring device also comprises a driving device for driving the turntable to rotate according to a set angle or a displacement detection device for detecting the displacement of the sliding base body or the force transmission arm.
The beneficial effects of the above technical scheme are that: the invention arranges the rigidity measuring device of the annular elastic piece, when measuring the rigidity of the annular elastic piece, the annular elastic piece to be measured can be firstly placed between the pushing structures of each transmission arm or sleeved outside the traction structure of each transmission arm, when the turntable rotates, each sliding base body can be driven to slide along the corresponding guide seat in a guiding way through the guiding match of each driving groove on the turntable and the corresponding guide piece, so as to drive each transmission arm to move along the radial direction of the turntable towards the direction close to the axis of the turntable or move along the direction far away from the axis of the turntable, meanwhile, the pushing structures on each transmission arm can push the annular elastic piece to ensure that the annular elastic piece contracts along the radial direction of the annular elastic piece, or the traction structure on each transmission arm can pull the annular elastic piece to expand along the radial direction of the annular elastic piece, at the moment, the pushing force sensor can measure the pulling force or the pushing force applied to the annular elastic piece, meanwhile, the radial displacement of the sliding base body or the transmission arm corresponding to the rotary table can be indirectly obtained through the set angle of the rotary table, or the radial displacement of the sliding base body or the transmission arm can be directly obtained through a displacement detection device, and the radial compression amount or the radial expansion amount of the annular elastic part can be obtained through the radial displacement of the sliding base body or the transmission arm, so that the corresponding rigidity data of the annular elastic part can be indirectly obtained through the force and the corresponding deformation amount applied to the annular elastic part, and the purpose of measuring the rigidity of the annular elastic part is achieved. In addition, compared with the radial action of the sliding base bodies driven by arranging the driving device at the radial outer side of each sliding base body, the sliding fit of the driving groove and the guide piece is beneficial to reducing the circumferential occupied space of the whole measuring device, and the structure of the measuring device is beneficial to being compact.
Furthermore, at least two sliding base bodies are provided with the force sensors, and the transmission arms connected with the force sensors are uniformly distributed along the circumference.
The beneficial effects of the above technical scheme are that: set up force transducer into at least two, can increase the measured data of the power that annular elastic component received like this, be favorable to improving measuring precision through a plurality of measured data, simultaneously through with force transducer along the circumference equipartition, can make force transducer's measured data more representative like this, be favorable to further improving measuring precision.
Further, the turntable is located below the transmission arm.
The beneficial effects of the above technical scheme are that: therefore, the installation of the annular elastic part on the measuring device is facilitated, the rigidity measurement of the annular elastic part is facilitated, the arrangement space of the measuring device is reduced, and the structure of the whole measuring device is compact.
Furthermore, an avoidance space is arranged on the workbench and located on the radial inner side of each guide seat, and the rotary disc is arranged in the avoidance space.
The beneficial effects of the above technical scheme are that: the avoidance space is arranged, so that the arrangement of the rotary table on the workbench is facilitated, the structure compactness of the measuring device is further ensured, and the arrangement space of the measuring device is further reduced.
Further, the driving groove is an arc groove.
The beneficial effects of the above technical scheme are that: set the driving groove to the circular arc groove, not only can realize like this that the carousel is comparatively mild to the drive of slip base member, the structural change in circular arc groove simultaneously for the direction cooperation in guide piece and circular arc groove also is more for smooth and smoothing, and the radial movement that so can make slip base member and transfer arm is also more steady.
Further, the number of transmission arms is at least 3.
The beneficial effects of the above technical scheme are that: therefore, when the top thrust or the pulling force is applied to the annular elastic part through each force transmission arm, the annular elastic part can basically simulate the use state of the annular elastic part, and the accuracy of rigidity measurement of the annular elastic part is favorably improved.
Furthermore, one end of the transmission arm, which is close to the axis of the rotating disc, is provided with a pushing groove with an opening facing to the radial inner side, and the pushing groove forms the pushing structure.
The beneficial effects of the above technical scheme are that: the pushing groove can realize pushing of the force transmission arm to the annular elastic part, and meanwhile, the position of the annular elastic part can be fixed in the axial direction, so that the annular spring is prevented from being radially pressed, distorted, deformed and popped up, the position of the pushed annular elastic part is fixed, and the accuracy of rigidity measurement is further guaranteed.
Furthermore, the transmission arm is provided with a convex block protruding along the axial direction of the turntable, the convex block is provided with a drawing groove with an opening facing to the radial outer side, and the drawing groove forms the drawing structure.
The beneficial effects of the above technical scheme are that: the lug is arranged on the force transmission arm, so that the force transmission arm can conveniently draw the annular elastic part, and the drawing groove is formed in the lug, so that the lug can draw the annular elastic part, the position of the annular elastic part can be fixed in the axial direction, the position of the drawn annular elastic part is fixed, and the accuracy of rigidity measurement is guaranteed.
Furthermore, the lug is located above the force transmission arm, so that the force transmission arm can support the annular elastic piece to be tested.
The beneficial effects of the above technical scheme are that: the annular elastic part is supported by the force transmission arm, so that the position of the pulled annular elastic part in the axial direction is further fixed, and the accuracy of rigidity measurement of the annular elastic part is further ensured.
In order to achieve the purpose, the measuring system adopts the following technical scheme:
a measuring system comprises a rigidity measuring device of an annular elastic part, wherein the rigidity measuring device of the annular elastic part comprises a workbench, guide seats which are uniformly distributed on the circumference are arranged on the top surface of the workbench, the guide seats are used for guiding and assembling corresponding sliding substrates, and the guiding direction of the sliding substrates on the guide seats is consistent with the radial direction of a distribution circle corresponding to the guide seats; the sliding base body is provided with a transmission arm, the transmission arm is provided with a pushing structure for pushing the annular elastic piece to be tested, the pushing structure on each transmission arm is positioned on the same circumference, and/or the transmission arm is provided with a traction structure for drawing the annular elastic piece to be tested, and the traction structure on each transmission arm is positioned on the same circumference; at least one sliding base body is provided with a force sensor, a corresponding force transmission arm is connected to the force sensor, and the force sensor is used for measuring the pushing force or the pulling force applied by the force transmission arm to the annular elastic piece to be measured; the rigidity measuring device of the annular elastic part also comprises a turntable which is coaxially arranged with the distribution circle of the guide seat, the turntable is provided with driving grooves which are in one-to-one correspondence with the sliding base bodies, each driving groove extends obliquely and is provided with a near end close to the axis of the turntable and a far end far away from the axis of the turntable, the sliding base bodies are provided with guide parts which are in guide fit with the corresponding driving grooves, and the guide parts are used for driving the sliding base bodies to synchronously move along the radial direction of the turntable when the turntable rotates; the rigidity measuring device also comprises a driving device for driving the turntable to rotate according to a set angle or a displacement detection device for detecting the displacement of the sliding base body or the force transmission arm; the measuring system comprises a data processing device connected with the force sensor.
The beneficial effects of the above technical scheme are that: the measuring system of the invention is provided with the rigidity measuring device of the annular elastic part, so that when the rigidity of the annular elastic part is measured, the annular elastic part to be measured can be firstly placed between the pushing structures of each force transmission arm or sleeved outside the traction structure of each force transmission arm, when the turntable rotates, each sliding base body can be driven to slide along the corresponding guide seat in a guiding way through the guiding match of each driving groove on the turntable and the corresponding guide part, so that each force transmission arm can be driven to move together along the radial direction of the turntable towards the direction close to the axis of the turntable or move together towards the direction far away from the axis of the turntable, meanwhile, the pushing structure on each force transmission arm can push the annular elastic part to enable the annular elastic part to shrink along the radial direction of the annular elastic part, or the traction structure on each force transmission arm can pull the annular elastic part to enable the annular elastic part to expand along the radial direction of the annular elastic part, and at the moment, the force sensor can measure the pulling force or pushing force applied to the annular elastic part, meanwhile, the radial displacement of the sliding base body or the transmission arm corresponding to the radial displacement can be indirectly obtained through the set angle of the rotation of the turntable, or the radial displacement of the sliding base body or the transmission arm can be directly obtained through the displacement detection device, and the rigidity data corresponding to the annular elastic part can be indirectly obtained through the processing of the obtained displacement data and the received force data by the data processing device, so that the purpose of measuring the rigidity of the annular elastic part is achieved. In addition, compared with the radial action of the sliding base bodies driven by arranging the driving device at the radial outer side of each sliding base body, the sliding fit of the driving groove and the guide piece is beneficial to reducing the circumferential occupied space of the whole measuring device, and the structure of the measuring device is beneficial to being compact.
Furthermore, at least two sliding base bodies are provided with the force sensors, and the transmission arms connected with the force sensors are uniformly distributed along the circumference.
The beneficial effects of the above technical scheme are that: set up force transducer into at least two, can increase the measured data of the power that annular elastic component received like this, be favorable to improving measuring precision through a plurality of measured data, simultaneously through with force transducer along the circumference equipartition, can make force transducer's measured data more representative like this, be favorable to further improving measuring precision.
Further, the turntable is located below the transmission arm.
The beneficial effects of the above technical scheme are that: therefore, the installation of the annular elastic part on the measuring device is facilitated, the rigidity measurement of the annular elastic part is facilitated, the arrangement space of the measuring device is reduced, and the structure of the whole measuring device is compact.
Furthermore, an avoidance space is arranged on the workbench and located on the radial inner side of each guide seat, and the rotary disc is arranged in the avoidance space.
The beneficial effects of the above technical scheme are that: the avoidance space is arranged, so that the arrangement of the rotary table on the workbench is facilitated, the structure compactness of the measuring device is further ensured, and the arrangement space of the measuring device is further reduced.
Further, the driving groove is an arc groove.
The beneficial effects of the above technical scheme are that: set the driving groove to the circular arc groove, not only can realize like this that the carousel is comparatively mild to the drive of slip base member, the structural change in circular arc groove simultaneously for the direction cooperation in guide piece and circular arc groove also is more for smooth and smoothing, and the radial movement that so can make slip base member and transfer arm is also more steady.
Further, the number of the transmission arms is at least 3.
The beneficial effects of the above technical scheme are that: therefore, when the pushing force or the pulling force is applied to the annular elastic part through each force transmission arm, the annular elastic part can basically simulate the use state of the annular elastic part, and the rigidity measurement precision of the annular elastic part is favorably improved.
Furthermore, one end of the transmission arm, which is close to the axis of the rotating disc, is provided with a pushing groove with an opening facing to the radial inner side, and the pushing groove forms the pushing structure.
The beneficial effects of the above technical scheme are that: the pushing groove can realize pushing of the force transmission arm to the annular elastic part, and meanwhile, the position of the annular elastic part can be fixed in the axial direction, so that the annular spring is prevented from being radially pressed, distorted, deformed and popped up, the position of the pushed annular elastic part is fixed, and the accuracy of rigidity measurement is further guaranteed.
Furthermore, the transmission arm is provided with a convex block protruding along the axial direction of the turntable, the convex block is provided with a drawing groove with an opening facing to the radial outer side, and the drawing groove forms the drawing structure.
The beneficial effects of the above technical scheme are that: the lug is arranged on the force transmission arm, so that the force transmission arm can conveniently draw the annular elastic part, and the drawing groove is formed in the lug, so that the lug can draw the annular elastic part, the position of the annular elastic part can be fixed in the axial direction, the position of the drawn annular elastic part is fixed, and the accuracy of rigidity measurement is guaranteed.
Furthermore, the lug is positioned above the force transmission arm, so that the force transmission arm can support the annular elastic piece to be tested.
The beneficial effects of the above technical scheme are that: the annular elastic part is supported by the force transmission arm, so that the position of the pulled annular elastic part in the axial direction is further fixed, and the accuracy of rigidity measurement of the annular elastic part is further ensured.
Drawings
FIG. 1 is a schematic view of a rigidity measuring apparatus of an annular elastic member in the present invention;
FIG. 2 is a schematic view showing a partial structure of a rigidity measuring apparatus of the annular elastic member according to the present invention (a mounting frame and a servo motor are not shown);
FIG. 3 is a schematic view of an annular spring;
FIG. 4 is a diagram showing an assembly relationship among the sliding base, the force sensor, and the transmission arm in the rigidity measuring apparatus of the annular elastic member according to the present invention;
fig. 5 is a schematic view of a turntable in the rigidity measuring apparatus of the annular elastic member of the present invention.
In the figure: 10. a work table; 11. a guide seat; 20. a turntable; 21. a drive slot; 22. connecting holes; 30. a sliding base; 31. an extension portion; 40. a bearing; 50. a force sensor; 60. a force transmission arm; 70. a pushing groove; 80. a bump; 81. a drawing groove; 90. compressing the annular spring; 100. stretching the annular spring; 110. a mandrel; 120. a mounting frame; 130. a servo motor; 140. the turntable drives the shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, in the embodiments of the present invention, relational terms such as "first" and "second", and the like, which may be present in the terms of the first and second, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the appearances of the phrase "comprising an … …" or similar limitation may be present without necessarily excluding the presence of additional identical elements in the process, method, article, or apparatus that comprises the same elements.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention is described in further detail below with reference to examples.
Embodiment 1 of the rigidity measuring apparatus of the annular elastic member in the present invention:
the stiffness measuring device for the annular elastic member in the present invention can be used for measuring the stiffness of the annular elastic member such as an annular spring, a rubber ring, etc., and in this embodiment, the annular spring is described as an example, wherein the structure of the annular spring is shown in fig. 3, and the annular spring is divided into a compression annular spring 90 and a tension annular spring 100 according to the load condition of the annular spring. As shown in fig. 1 and fig. 2, the rigidity measuring device of the annular elastic member includes a table 10, the table 10 is mounted on a mounting frame 120, in this embodiment, the table 10 is in a disk shape, fifteen guide seats 11 are uniformly distributed on the top surface of the table 10, and each guide seat 11 extends along the radial direction of the disk-shaped table 10. The worktable 10 is provided with an avoiding space located at the radial inner side of each guide seat 11, a turntable 20 coaxially arranged with the worktable 10 is installed in the avoiding space, as shown in fig. 5, driving grooves 21 are uniformly arranged on the top surface of the turntable 20 along the circumferential direction, the driving grooves 21 are the same in number and are in one-to-one correspondence with the guide seats 11, in this embodiment, the driving grooves 21 are eccentric arc grooves, each driving groove 21 extends obliquely, and each driving groove 21 has a near end close to the axis of the turntable 20 and a far end far away from the axis of the turntable 20. In addition, as shown in fig. 1, the rigidity measuring device of the annular elastic member further includes a servo motor 130, an output end of the servo motor 130 is connected with a turntable driving shaft 140 in a transmission manner, as shown in fig. 5, a connecting hole 22 for the turntable driving shaft 140 to penetrate is formed in the center of the turntable 20, and the connecting hole 22 and the turntable driving shaft 140 are connected in a matching manner through a key, such as a flat key, a spline, and the like, so that the turntable 20 and the turntable driving shaft 140 can be connected in a transmission manner, the servo motor 130 can drive the turntable 20 to rotate at a certain angle, and the servo motor 130 can also control the rotation angle of the turntable 20, that is, the servo motor 130 can control the turntable 20 to rotate at a set angle.
As shown in fig. 2 and 4, each guide seat 11 on the table 10 is guided and assembled with a sliding base 30 corresponding to each driving groove 21 one by one, the guiding direction of the sliding base 30 on the guide seat 11 is consistent with the radial direction of the distribution circle corresponding to the guide seat 11, the sliding base 30 extends along the radial direction of the turntable 20, a guide member is arranged at one side of the bottom of the sliding base 30 close to the axis of the turntable 20, the guide member comprises a spindle 110 which is arranged at the bottom of the sliding base 30 and extends vertically, a bearing 40 is installed on the spindle 110, and the bearing 40 is inserted into the corresponding driving groove 21. When the turntable 20 rotates clockwise, the bearing 40 can be driven to roll towards one end of the driving groove 21 close to the radial inner side, and simultaneously each sliding base 30 is driven to synchronously move towards the radial inner side on the workbench 10; when the turntable 20 rotates counterclockwise, the bearing 40 is driven to roll toward the end of the driving slot 21 away from the radial inner side, and simultaneously drives the sliding substrates 30 to synchronously move toward the radial outer side on the worktable 10. Further, a displacement sensor (not shown) is attached to the slide base 30, and the amount of radial movement of the slide base 30 can be measured by the displacement sensor.
As shown in fig. 2 and 4, the sliding base 30 includes an extending portion 31 disposed at one side close to the axis of the turntable 20 and extending vertically upward, three sliding base 30 uniformly distributed along the circumferential direction in each sliding base 30 are provided, a force sensor 50 is mounted at one side of the extending portion 31 close to the axis of the turntable 20, a force transmission arm 60 extending along the radial direction of the turntable 20 is connected to one side of the force sensor 50 close to the axis of the turntable 20, while on the other sliding base 30, a force transmission arm 60 extending along the radial direction of the turntable 20 is directly connected to one side of the extending portion 31 close to the axis of the turntable 20, and the length dimension of the force transmission arm 60 can be determined according to the dimension of the annular spring. As shown in fig. 4, the end of the transmission arm 60 close to the axis of the turntable 20 is provided with pushing grooves 70 with openings facing the radial inner side, and each pushing groove 70 is located on the same circumference, the compression ring-shaped spring 90 can be supported and placed in the middle of the turntable 20 through the clamping of each pushing groove 70, when the stiffness of the compression ring-shaped spring 90 is measured, the turntable 20 rotates clockwise, and through the synchronous movement of each sliding base 30 towards the radial inner side, each transmission arm 60 can be driven to move synchronously towards the radial inner side, so that each pushing groove 70 pushes the compression ring-shaped spring 90, so that the compression ring-shaped spring 90 is compressed inwards along the radial direction, the compressed compression ring-shaped spring 90 basically keeps a circular shape, and the pushing grooves 70 form the pushing structure of the transmission arm 60. In addition, the radial compression distortion ejection of the compression ring spring 90 can be prevented by the urging groove 70, and the contact between the urging groove 70 and the compression ring spring 90 can simulate the actual contact area of the compression ring spring 90.
As shown in fig. 4, the force transmission arm 60 is further provided with a boss which is located above the force transmission arm 60 and protrudes upward, one side of the boss, which is away from the axis of the rotary table 20, is provided with a pulling groove 81 which opens toward the radial outer side, the pulling annular spring 100 can be fixed through the support of the force transmission arm 60 and the pulling groove 81, when the stiffness of the pulling annular spring 100 is measured, the rotary table 20 rotates counterclockwise, the force transmission arms 60 can be driven to move synchronously toward the radial outer side through the synchronous movement of the sliding base bodies 30 toward the radial outer side, and then the pulling grooves 81 pull the pulling annular spring 100, so that the pulling annular spring 100 is pulled outward along the radial outer side, and the pulled pulling annular spring 100 keeps a substantially circular shape, and the pulling grooves form the pulling structure of the force transmission arm 60. In addition, the contact between the pulling groove 81 and the tension coil spring may simulate the actual contact area of the tension ring spring 100.
In addition, in the measuring device, the larger the number of the force transmission arms 60, the better, the more the annular elastic member to be measured can be made to be close to a circle, thereby improving the accuracy of the detection result, and considering the space factor occupied by the arrangement of the guide seat 11 and the sliding base 30, the number of the force transmission arms 60 is preferably set to fifteen.
The force sensor 50 is used for sliding the base body 30 for a certain displacement, measuring the pushing force exerted by the primary transmission arm 60 on the compression annular spring 90 or the pulling force exerted by the transmission arm 60 on the extension annular spring 100, and the force sensor 50 is connected with a data processing device, and can fit a displacement-force relation curve and a displacement-average force relation curve through the data processing device, so that the rigidity of the annular spring can be indirectly obtained, and the rigidity measurement accuracy is improved.
The working principle of the rigidity measuring device of the annular elastic part is as follows:
when measuring the rigidity of the compression annular spring 90, firstly fixing the compression annular spring 90 on the radial inner side of each force transmission arm 60 through the pushing groove 70 of each force transmission arm 60, then driving the turntable 20 to rotate clockwise through the servo motor 130, driving each sliding base body 30 to move synchronously and radially inwards through the matching of the corresponding driving groove 21 and the bearing 40, meanwhile, each force transmission arm 60 can also move synchronously and radially inwards along with the sliding base body 30, pushing and compressing the annular spring 90 through the pushing groove 70, so that the compression annular spring 90 is compressed radially inwards, in the process of compressing the compression annular spring 90, the displacement sensor measures the displacement of the sliding base body 30 at intervals, the force sensor 50 measures the pushing force applied to the compression annular spring 90 once, and a displacement-force relation curve is fitted through the data processing device, to indirectly obtain the stiffness of the compression ring spring 90.
When the stiffness of the extension ring spring 100 is measured, the extension ring spring 100 is fixed by the support of the transmission arms 60 and the stop of the extension ring spring 100 contracting radially inward by the pulling groove 81, then the turntable 20 is driven by the servo motor 130 to rotate counterclockwise, the sliding base bodies 30 are driven to move synchronously radially outward by the corresponding driving groove 21 and the bearing 40, meanwhile, the transmission arms 60 move synchronously radially outward along with the sliding base bodies 30, and the extension ring spring 100 is pulled by the pulling groove 81, so that the extension ring spring 100 is extended radially outward, during the extension of the extension ring spring 100, the displacement sensor measures the displacement of the sliding base bodies 30 at intervals, and each time the sliding base bodies 30 move corresponding displacement, the force sensor 50 measures the pulling force applied to the extension ring spring 100 once, and a displacement-force relation curve is fitted by the data processing device, to indirectly obtain the stiffness of the tension ring spring 100.
When the rigidity measuring device of the annular elastic part measures the rigidity of the annular elastic part, the force sensor can measure the pulling force or the jacking force applied to the annular elastic part, meanwhile, the radial displacement of the sliding base body and the force transmission arm can be directly obtained through the displacement sensor, and the radial compression amount or the radial expansion amount of the annular elastic part can be obtained through the radial displacement of the sliding base body and the force transmission arm, so that the corresponding rigidity data of the annular elastic part can be indirectly obtained through the force applied to the annular elastic part and the corresponding deformation amount, and the purpose of measuring the rigidity of the annular elastic part is achieved. In addition, compared with the radial action of the sliding base bodies driven by arranging the driving device at the radial outer side of each sliding base body, the sliding fit of the driving groove and the guide piece is beneficial to reducing the circumferential occupied space of the whole measuring device, and the structure of the measuring device is beneficial to being compact.
Embodiment 2 of the rigidity measuring apparatus of the annular elastic member in the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, the bump 80 is located above the transmission arm 60, and at this time, the transmission arm 60 can support the annular elastic member to be tested. In the embodiment, the protrusion 80 is located below the transmission arm 60, and the annular elastic member can be supported only by the pulling groove 81.
Embodiment 3 of the rigidity measuring apparatus of the annular elastic member in the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the projection 80 is provided with a pulling groove 81 that opens radially outward, and the pulling groove 81 constitutes a pulling structure that pulls the annular elastic member. In the embodiment, the protrusion 80 constitutes a pulling structure for pulling the annular elastic member, and when the protrusion 80 is located below the transmission arm 60, the annular elastic member needs to be slightly expanded to a certain extent when the annular elastic member is fixedly installed.
Embodiment 4 of the rigidity measuring apparatus of the annular elastic member of the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, an end of the force transmission arm 60 close to the axis of the turntable 20 is provided with a pushing groove 70 with an opening facing the radial inner side, and the pushing groove 70 constitutes a pushing structure for pushing the annular elastic member. In this embodiment, the end of the force transmission arm 60 near the axis of the turntable 20 is provided with an end plate arranged vertically, and the force transmission arm 60 can push the annular elastic member through the end plate, so that the end plate forms a pushing structure for pushing the annular elastic member.
Embodiment 5 of the rigidity measuring apparatus of annular elastic member of the present invention:
the present embodiment is different from embodiment 1 in that fifteen driving grooves 21 are provided in embodiment 1. In other embodiments, the number of the driving grooves 21 may be increased or decreased, and the larger the number of the driving grooves 21 is, the more the corresponding sliding base 30 and the force transmission arms 60 are, and the more the circumferential arrangement of the force transmission arms 60 is dense, the closer the annular elastic member stretched or compressed by the force transmission arms 60 is to the circular shape, but the number of the driving grooves 21 needs to satisfy the arrangement space of the turntable 20; when the driving grooves 21 are less, the tested annular elastic member is ensured to be basically close to the actual working condition.
Example 6 of the rigidity measuring apparatus of the annular elastic member in the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the driving groove 21 is an arc groove. In this embodiment, the driving groove 21 is a slanted groove provided on the top surface of the turntable 20, and the slanted groove gradually inclines from the radially outer side to the radially inner side from one end to the other end.
Example 7 of the rigidity measuring apparatus of the annular elastic member in the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, the force transmission arm 60 is provided with a pulling structure and a pushing structure. In this embodiment, the force transmission arm 60 is provided with only a pulling structure, and at this time, the radial expansion devices only move in the radial direction of the turntable 20 and in the direction away from the axis of the turntable 20, and the force sensor only measures the pulling force.
Embodiment 8 of the rigidity measuring apparatus of the annular elastic member in the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, the force transmission arm 60 is provided with a pulling structure and a pushing structure. In this embodiment, the force transmission arm 60 is provided with only a pushing structure, and at this time, each radial expansion device only moves along the radial direction of the turntable 20 toward the direction close to the axis of the turntable 20, and the force sensor only measures the pushing force.
Example 9 of the rigidity measuring apparatus of the annular elastic member in the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the radial displacement of the sliding base 30 and the transmission arm 60 is directly detected by mounting a displacement sensor. In the embodiment, the driving device (e.g., a servo motor) drives the turntable 20 to rotate by a set angle, and converts the rotation angle of the turntable 20 into a radial displacement of the sliding substrate 30 corresponding to the rotation angle, thereby implementing indirect measurement of the radial displacement of the sliding substrate 30.
the present embodiment is different from embodiment 1 in that in embodiment 1, the turntable 20 is driven to rotate by a motor such as a servo motor 130. In the embodiment, a gear transmission mechanism is disposed on the turntable 20, and the rotation of the turntable 20 is driven by the manual driving of the gear transmission mechanism.
Embodiment of the measurement system of the invention: the measuring system comprises a rigidity measuring device of the annular elastic part and a data processing device connected with the force sensor, wherein the specific structure of the rigidity measuring device of the annular elastic part is the same as that of the rigidity measuring device of the annular elastic part in the embodiment of the rigidity measuring device of the annular elastic part, and the details are not repeated here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. The rigidity measuring device of the annular elastic part is characterized by comprising a workbench (10), wherein guide seats (11) which are uniformly distributed on the circumference are arranged on the top surface of the workbench (10), the guide seats (11) are used for guiding and assembling corresponding sliding base bodies (30), and the guide direction of the sliding base bodies (30) on the guide seats (11) is consistent with the radial direction of a distribution circle corresponding to the guide seats (11); the sliding base body (30) is provided with a transmission arm (60), the transmission arm (60) is provided with a pushing structure for pushing the annular elastic piece to be tested, the pushing structures on the transmission arms (60) are positioned on the same circumference, and/or the transmission arm (60) is provided with a drawing structure for drawing the annular elastic piece to be tested, and the drawing structures on the transmission arms (60) are positioned on the same circumference; the force sensor (50) is arranged on at least one sliding base body (30), the corresponding force transmission arm (60) is connected to the force sensor (50), and the force sensor (50) is used for measuring the pushing force or the pulling force applied by the force transmission arm (60) to the annular elastic piece to be measured; the rigidity measuring device of the annular elastic part further comprises a rotary table (20) coaxially arranged with the distribution circle of the guide seat (11), the rotary table (20) is provided with driving grooves (21) which are in one-to-one correspondence with the sliding base bodies (30), each driving groove (21) extends obliquely and is provided with a near end close to the axis of the rotary table (20) and a far end far away from the axis of the rotary table (20), the sliding base bodies (30) are provided with guide parts in guide fit with the corresponding driving grooves (21), and the guide parts are used for driving the sliding base bodies (30) to move synchronously along the radial direction of the rotary table (20) when the rotary table (20) rotates; the rigidity measuring device also comprises a driving device for driving the turntable (20) to rotate according to a set angle or a displacement detecting device for detecting the displacement of the sliding base body (30) or the force transmission arm (60).
2. The stiffness measuring device of an annular elastic member according to claim 1, wherein the force sensors (50) are provided on at least two of the sliding base bodies (30), and the transmission arms (60) connected to the force sensors (50) are circumferentially and uniformly distributed.
3. The annular elastic member stiffness measuring device according to claim 1, wherein the turntable (20) is located below the transmission arm (60).
4. The rigidity measuring device of an annular elastic member according to claim 3, wherein an escape space is provided in the table (10) radially inside each of the guide bases (11), and the turntable (20) is provided in the escape space.
5. The rigidity measurement device of an annular elastic member according to any one of claims 1 to 4, wherein the drive groove (21) is a circular arc groove.
6. The stiffness measuring device of an annular elastic member according to any one of claims 1 to 4, wherein the number of the transmission arms (60) is at least 3.
7. The rigidity measurement device of the annular elastic member according to any one of claims 1 to 4, wherein an end of the transmission arm (60) close to the axis of the turntable (20) is provided with a pushing groove (70) with an opening facing radially inward, and the pushing groove (70) forms the pushing structure.
8. The rigidity measurement device of the annular elastic member according to any one of claims 1 to 4, wherein the transmission arm (60) is provided with a projection (80) projecting in an axial direction of the turntable (20), the projection (80) is provided with a pulling groove (81) having an opening facing radially outward, and the pulling groove (81) constitutes the pulling structure.
9. The stiffness measuring device of a ring-shaped elastic member according to claim 8, wherein the projection (80) is located above the transmission arm (60) so that the transmission arm (60) can support the ring-shaped elastic member to be measured.
10. A measuring system, characterized in that it comprises a stiffness measuring device of an annular elastic member according to any one of claims 1 to 9, and further comprises a data processing device connected to the force sensor (50).
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| CN202210204467.2A CN114563147B (en) | 2022-03-03 | 2022-03-03 | Rigidity measuring device and system of annular elastic piece |
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| CN114563147B (en) | 2023-06-30 |
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