CN117571309A - Testing device for spline pair - Google Patents
Testing device for spline pair Download PDFInfo
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- CN117571309A CN117571309A CN202311552134.XA CN202311552134A CN117571309A CN 117571309 A CN117571309 A CN 117571309A CN 202311552134 A CN202311552134 A CN 202311552134A CN 117571309 A CN117571309 A CN 117571309A
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- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 238000006073 displacement reaction Methods 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 24
- 238000000034 method Methods 0.000 description 11
- 230000033001 locomotion Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 230000002441 reversible effect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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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
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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Abstract
The invention discloses a testing device of a spline pair, which comprises a mounting seat, a linear driving assembly, a clamping piece, a connecting rod driving piece, a connecting rod loading mechanism and a detection assembly, wherein the mounting seat is arranged on the mounting seat; the linear driving assembly is used for driving the mounting seat to linearly move; the clamping piece is used for clamping the spline shaft; the connecting rod driving piece is arranged on the mounting seat; the connecting rod loading mechanism is in transmission connection with the connecting rod driving piece and is used for being connected with the spline nut, and the connecting rod driving piece drives the spline nut to rotate around the spline shaft through the connecting rod loading mechanism; the detection assembly comprises a friction force measuring piece and a displacement measuring piece which are respectively arranged on the mounting seat, the friction force measuring piece is connected with the connecting rod loading mechanism, and the displacement measuring piece is used for detecting the rotation distance of the connecting rod loading mechanism. The testing device of the spline pair has the advantages of simple flow and higher measurement accuracy.
Description
Technical Field
The invention relates to the technical field of spline pair detection, in particular to a testing device for a spline pair.
Background
The spline nut and the spline shaft can roll on a precisely ground raceway to do linear motion by utilizing a rolling body, and can also finish the transmission of torque between the moving pairs by driving the spline nut, so that the spline nut and the spline shaft are widely applied to various fields.
Rigidity and friction are important indexes for influencing the running precision of the spline pair, in the prior art, the spline rigidity is measured, the deformation is measured by simulating loading mainly through a mode of hanging a weight in the circumferential direction of a spline nut, and the testing principle is simple, but the flow is complicated. The friction force measurement is carried out under no load on a test bed, the difference between the measurement result and the actual situation is slightly large, the conventional performance test bed of the rolling spline pair can realize loading and can only carry out test independently for a certain index, when the measurement of a plurality of performance indexes is carried out, the measurement is carried out on a plurality of test beds one by one, a plurality of links need to be participated in manually in the measurement process, and the measurement accuracy is reduced.
In view of the foregoing, it is desirable to provide a new testing device for spline pairs that addresses or at least alleviates the above-mentioned technical drawbacks.
Disclosure of Invention
The invention mainly aims to provide a testing device for a spline pair, and aims to solve the technical problems of complex detection flow and low accuracy of the spline pair in the prior art.
In order to achieve the above object, the present invention provides a testing device for a spline pair, comprising:
a mounting base;
the linear driving assembly is used for driving the mounting seat to move linearly;
the clamping piece is used for clamping the spline shaft;
the connecting rod driving piece is arranged on the mounting seat;
the connecting rod loading mechanism is in transmission connection with the connecting rod driving piece and is used for being connected with a spline nut, and the connecting rod driving piece drives the spline nut to rotate around the spline shaft through the connecting rod loading mechanism;
the detection assembly comprises a friction force measuring piece and a displacement measuring piece which are respectively arranged on the mounting seat, wherein the friction force measuring piece is connected with the connecting rod loading mechanism, and the displacement measuring piece is used for detecting the rotation distance of the connecting rod loading mechanism.
In an embodiment, the link loading mechanism comprises a driving link, an intermediate link and a loading link which are sequentially hinged, wherein the link driving member is in transmission connection with the driving link, the loading link is used for being connected with the spline nut, and the loading link is connected with the friction force measuring member.
In an embodiment, in the initial state, the length direction of the driving link is perpendicular to the length direction of the intermediate link, and the length direction of the intermediate link is perpendicular to the length direction of the loading link.
In an embodiment, the loading connecting rod comprises a connecting section and an extension section, the connecting section comprises a first section, a second section and a third section, the first section, the second section and the third section are sequentially connected, the first section is hinged with the middle connecting rod, the second section is used for being connected with the spline nut, the third section is connected with the extension section, the extension section is connected with the friction force measuring piece, and the displacement measuring piece is used for detecting the rotation distance of the extension section.
In an embodiment, the middle connecting rod is provided with a movable groove, two side walls of the movable groove are respectively connected with two ends of the hinge shaft, and the loading connecting rod is rotatably connected with the hinge shaft and slidably connected with the hinge shaft.
In an embodiment, the friction force measuring piece comprises a pulling pressure sensor and a reverser, the reverser is connected with the pulling pressure sensor, the reverser comprises a connecting rod, a first side wall and a second side wall which are respectively arranged at two ends of the connecting rod, and the connecting rod loading mechanism is used for being abutted with the first side wall or the second side wall.
In one embodiment, the connecting rod loading mechanism is formed with a receiving groove, the receiving groove is arranged on the periphery of the connecting rod, and the width of the receiving groove is larger than the outer diameter of the connecting rod.
In an embodiment, the clamping piece comprises two groups of clamping parts which are oppositely arranged, and the two groups of clamping parts are respectively used for fixing two ends of the spline shaft.
In an embodiment, the clamping portion includes a clamp seat and a locking block that are connected to each other, the clamp seat is formed with a first clamping groove, the locking block is formed with a second clamping groove, and the first clamping groove and the second clamping groove face to form a clamping space together.
In an embodiment, the testing device of the spline pair further comprises a base, and the clamping piece and the linear driving assembly are both installed on the base.
In an embodiment, the testing device of the spline pair further comprises a linear guide rail, the linear guide rail and the linear driving assembly are arranged at intervals, and the mounting seat is in sliding connection with the linear guide rail.
In the technical scheme of the invention, before the measurement starts, the spline shaft to be measured is arranged on the clamping piece for fixing, and the spline nut and the connecting rod loading mechanism can be locked through bolts. After the spline shaft and the spline nut to be measured are installed, moment output is respectively carried out by the connecting rod driving piece in the forward direction and the reverse direction, the connecting rod loading mechanism can drive the spline nut to rotate around the spline shaft in the forward direction or the reverse direction after receiving torque, rolling bodies in the spline pair deform, so that the spline nut is twisted by a small angle relative to the spline shaft, the connecting rod loading mechanism twists by a certain amplitude, the variable delta x is read through the displacement measuring piece, then the torsion angle theta = delta x/L3 of the measuring point of the displacement sensor is calculated according to the distance L3 between the measuring point of the displacement sensor and the rotation center of the spline nut, and the rigidity of the spline pair to be measured can be calculated according to the torsion angle theta and the torque Tm applied by the connecting rod driving piece.
When the friction force is measured, the mounting seat is driven by the linear driving assembly, the linear driving assembly slides along the linear direction relatively, the friction force measuring piece fixed on the mounting seat can push or pull the connecting rod loading mechanism, and the stressed connecting rod loading mechanism and the spline nut linearly move on the spline shaft together, so that the friction force when the spline nut slides relatively to the spline shaft is measured.
The groove distortion is that under the condition of no load (the connecting rod driving piece does not apply torque), the maximum value θmax of the change of the torsion angle of the spline nut is measured when the spline nut runs along the spline shaft, the processing error in the spline pair can lead the spline nut to deflect in the linear running process of the nut, the rotation of the spline nut can be reflected through the torsion amplitude of the connecting rod loading mechanism, the displacement measuring piece reads the change quantity in real time, and the measuring principle and the formula are the same, so that the groove distortion of the spline pair is detected.
The invention can realize the functions of simulating load application and dragging spline nut cyclic motion.
The testing indexes of the spline pair comprise rigidity, friction force, groove distortion and reliability, the testing of each performance index is not required to be carried out independently, human participation is not required in the testing process, the synchronous measurement of multiple performance indexes of the friction force, static rigidity, dynamic rigidity, groove distortion and reliability of the spline pair can be realized through one-time clamping, the measurement uncertainty error caused by repeated clamping and human intervention is reduced, the testing efficiency is improved, the uncertainty range of a measurement result is reduced, and the method has the advantages of simple flow and higher measurement accuracy.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the following brief description will be given of the drawings required for the description of the embodiments or the prior art, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained from the structures shown in these drawings without the need for inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a testing device for a spline pair and an assembled spline pair according to an embodiment of the present invention;
FIG. 2 is a schematic view of a link drive, link loading mechanism and spline pair according to one embodiment of the present invention;
FIG. 3 is a schematic view of a friction measuring member in a testing device for a spline pair according to an embodiment of the present invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" is at least two groups, for example, two groups, three groups, etc., unless explicitly specified otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be either a fixed connection or a removable connection or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or in communication with each other within two sets of elements or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.
Referring to fig. 1 to 3, the invention provides a testing device for spline pairs, which comprises a mounting seat 1, a linear driving assembly 2, a clamping piece 3, a connecting rod driving piece 4, a connecting rod loading mechanism 5 and a detection assembly; the linear driving assembly 2 is used for driving the mounting seat 1 to linearly move; the clamping piece 3 is used for clamping the spline shaft 200; the connecting rod driving piece 4 is arranged on the mounting seat 1; the connecting rod loading mechanism 5 is in transmission connection with the connecting rod driving piece 4 and is used for being connected with the spline nut 300, and the connecting rod driving piece 4 drives the spline nut 300 to rotate around the spline shaft 200 through the connecting rod loading mechanism 5; the detection assembly comprises a friction force measuring piece 61 and a displacement measuring piece 62 which are respectively arranged on the mounting seat 1, the friction force measuring piece 61 is connected with the connecting rod loading mechanism 5, and the displacement measuring piece 62 is used for detecting the rotation distance of the connecting rod loading mechanism 5.
In the above embodiment, the testing device of the spline pair is mainly a testing device or testing device for performing tests on performance indexes of the spline pair, such as rigidity, friction force, groove distortion, reliability and the like. The spline pair comprises a spline shaft 200 and a spline nut 300, the spline nut 300 is sleeved on the spline shaft 200, and the spline nut 300 can move and rotate relative to the spline shaft 200.
Before the measurement starts, the spline shaft 200 to be measured is mounted on the clamping piece 3 for fixing, and the spline nut 300 and the connecting rod loading mechanism 5 can be locked by bolts. After the spline shaft 200 and the spline nut 300 to be measured are installed, moment output is respectively carried out by the connecting rod driving piece 4 in the forward direction and the reverse direction, the connecting rod loading mechanism 5 can drive the spline nut 300 to rotate around the spline shaft 200 in the forward direction or the reverse direction after receiving torque, rolling bodies in the spline pair deform, so that the spline nut 300 is twisted by a small angle relative to the spline shaft 200, the connecting rod loading mechanism 5 twists by a certain amplitude, the variable quantity deltax is read through the displacement measuring piece 62, then the torsion angle theta = deltax/L3 of the spline pair can be calculated according to the distance L3 between the measuring point of the displacement sensor and the rotation center of the spline nut 300, and the rigidity of the spline pair to be measured can be calculated according to the torsion angle theta and the torque Tm applied by the connecting rod driving piece 4.
When the friction force is measured, the mounting seat 1 is driven by the linear driving assembly 2, and slides along the linear direction relative to the linear driving assembly 2, the friction force measuring piece 61 fixed on the mounting seat 1 pushes or pulls the connecting rod loading mechanism 5, and the stressed connecting rod loading mechanism 5 and the spline nut 300 move on the spline shaft 200 linearly together, so that the friction force when the spline nut 300 slides relative to the spline shaft 200 is measured.
The groove distortion is that under the condition of no load (no torque is applied by the connecting rod driving member 4), the maximum value θmax of the change of the torsion angle of the spline nut 300 is measured when the spline nut 300 runs along the spline shaft 200, the processing error in the spline pair can lead to the deflection of the spline nut 300 during the linear running process of the nut, the rotation of the spline nut 300 can be reflected by the torsion amplitude of the connecting rod loading mechanism 5, the displacement measuring member 62 reads the change in real time, and the measuring principle is the same as the torsion angle θ, so that the groove distortion of the spline pair is detected.
The reliability is that after simulated loading is carried out according to actual use conditions, the spline nut 300 is driven by the linear driving assembly 2 to circularly reciprocate along the spline shaft 200, a reliability operation record is filled in the operation process, the failure condition of the spline pair under the rated working condition is measured, the simulated loading process is carried out by the connecting rod driving piece 4, and the operation is carried out under the specified working condition, so that the failure and service life condition of the spline pair are measured, and the function of simulating the load application and dragging the spline nut 300 to circularly move can be realized.
According to the embodiment, the test indexes of the spline pair comprise rigidity, friction force, groove distortion and reliability, the test of each performance index is not required to be carried out independently, human participation is not required in the test process, synchronous measurement of multiple performance indexes of friction force, static rigidity, dynamic rigidity, groove distortion and reliability of the spline pair can be realized through one-time clamping, measurement uncertainty errors caused by repeated clamping and human intervention are reduced, the test efficiency is improved, the uncertainty range of a measurement result is reduced, and the method has the advantages of being simple in flow and high in measurement accuracy.
The link driving member 4 may be a driving motor, and the linear driving assembly 2 may be a structure in which a telescopic cylinder is directly driven, or a structure in which a motor is indirectly driven by a screw structure.
Referring to fig. 1 and 2 in combination, in one embodiment, the link loading mechanism 5 includes a drive link 51, an intermediate link 52, and a loading link 53 hinged in sequence, the link driver 4 is in driving connection with the drive link 51, the loading link 53 is for connection with a spline nut 300, and the loading link 53 is for connection with a friction force measuring member 61. In this embodiment, torque is transferred through the multi-link structure, the torque is transferred from the link driving member 4 to the driving link 51, then to the intermediate link 52, and finally to the spline nut 300 through the loading link 53, so as to drive the spline nut 300 to rotate, and the device is convenient to install and simple and compact in structure. The friction force measuring member 61 drives the spline nut 300 to reciprocate linearly by pushing or pulling the loading link 53, and the displacement measuring member 62 also measures the displacement distance of a certain position on the loading link 53.
Referring to fig. 2, in an initial state, the length direction of the driving link 51 is perpendicular to the length direction of the intermediate link 52, and the length direction of the intermediate link 52 is perpendicular to the length direction of the loading link 53. Specifically, in the initial state, the driving link 51 is in a horizontal state, the middle link 52 is in a vertical state, the loading link 53 is parallel to the driving link 51 and is in a horizontal state, the orthogonal link loading mechanism 5 of this embodiment has a compact structure, the middle link 52 is perpendicular to the driving link 51 and the loading link 53 respectively in the initial state, so that the torque of the link driving member 4 can be transferred to the spline nut 300 in equal proportion through the link loading mechanism 5, since the initial position of the link loading mechanism 5 is orthogonal, and the middle link 52 is a two-force rod, the direction of the force is perpendicular to the loading link 53 along the axis direction of the link, and the ratio of the torque applied to the loading link 53 to the distance between two rotation points of the loading link 53 and the two rotation points of the driving link 51 is equal to the ratio of the distance between the two rotation points of the loading link 53, i.e., t=tm×l2/l1; where T is the torque to which the loading link 53 is subjected (i.e., the torque to which the spline nut 300 is subjected), tm is the torque of the link driver 4, L1 is the length of the driving link 51 from the rotational center of the link driver 4 to the hinge with the intermediate link 52, and L2 is the length of the loading link 53 from the hinge with the intermediate link 52 to the rotational center of the spline nut 300.
Referring to fig. 2, in an embodiment, the loading link 53 includes a connection section 531 and an extension section 532, the connection section 531 includes a first section 5311, a second section 5312 and a third section 5313, the first section 5311, the second section 5312 and the third section 5313 are sequentially connected, the first section 5311 of the connection section 531 is hinged with the intermediate link 52, the second section 5312 of the connection section 531 is used to connect with the spline nut 300, the third section 5313 of the connection section 531 is connected with the extension section 532, the extension section 532 is connected with the friction force measuring member 61, and the displacement measuring member 62 is used to detect a rotational distance of the extension section 532. In order to match the shape of the spline nut 300 and avoid interference with the spline shaft 200, the second section 5312 is in a semicircular arc shape, the first section 5311 and the third section 5313 are still on the same straight line, the rigidity measurement and the connecting rod loading mechanism 5 are skillfully combined, the connecting rod fixedly connected with the spline nut 300 is lengthened, the angular displacement of the micro deformation generated after the spline nut 300 is loaded can be amplified and converted into linear displacement so as to facilitate the resolution and collection of the displacement measuring piece 62, the rolling body in the spline pair deforms after the loading connecting rod 53 is subjected to torque to cause the nut to twist by a micro angle relative to the spline shaft 200, the extension section 532 of the loading connecting rod 53 is driven to rotate, the change delta x is read through the displacement measuring piece 62, the torsion angle theta = delta x/L3 is the length of the measuring point of the displacement measuring piece 62 on the extension section 532 from the rotation center of the spline nut 300, and the rigidity of the measured spline pair is K θ =t/θ; where T is the torque experienced by the spline nut 300. Specifically, displacement measuring element 62 is an optical displacement sensor forThe distance of up and down movement of a position on the extension rod is measured, and the distance of straight line movement corresponds to the rotation amplitude of the position due to the small torsion amplitude.
Referring to fig. 1 and 3 in combination, in an embodiment, in order to reduce the influence of friction fluctuation on a measurement result when the spline nut 300 is started or stopped when the spline nut 300 is linearly reciprocated with respect to the spline shaft 200, only the dynamic friction force when the spline pair slides is measured, the friction force measuring member 61 includes a pull pressure sensor 611 and a reverser 612, the reverser 612 is fixedly connected with the pull pressure sensor 611, the reverser 612 includes a connecting rod 6121 and a first side wall 6122 and a second side wall 6123 respectively provided at both ends of the connecting rod 6121, and the connecting rod loading mechanism 5 is used to abut against the first side wall 6122 or the second side wall 6123. For example, when the spline pair slides forward, the loading link 53 is pushed by the first side wall 6122 close to the pull pressure sensor 611, when the spline pair moves to the end point of a certain stroke, the linear driving assembly 2 drives the mounting seat 1 reversely and drives the friction force measuring member 61 to move backward, as the friction force measuring member 61 moves, the loading link 53 is separated from the first side wall 6122 and gradually approaches the second side wall 6123, in the process, the spline nut 300 does not move, the pull pressure sensor 611 is not stressed, so that no measurement value exists, until the loading link 53 abuts against the second side wall 6123, the loading link 53 is pulled by the second side wall 6123, the loading link 53 drives the spline nut 300 to move backward, the pull pressure sensor 611 re-measures the dynamic friction force when the spline nut 300 slides, the embodiment skillfully combines the measurement of the friction force with the link loading mechanism 5, the extension 532 of the loading link 53 is dragged by the pull pressure sensor 611 to realize the linear motion of the spline pair, the measurement of the friction force is completed, the spline nut 300 is pushed or pulled by the reverser 612, and the spline nut 300 moves more accurately, and the spline nut 300 is prevented from moving reversely due to the fluctuation of the spline nut 300. The distance between the first side wall 6122 and the second side wall 6123 (i.e. the width of the clamping groove of the reverser 612) is larger than the thickness of the loading connecting rod 53, and the other surface of the reverser 612 contacts with the loading connecting rod 53 after the over-travel, so that the influence caused by friction fluctuation is avoided.
In order to avoid that the spline nut 300 is driven by the link driver 4, the driving link 51, and the intermediate link 52 to move without being pushed or pulled by the inverter 612 when the direction of the movement is changed. Referring to fig. 1, a movable groove is formed in the intermediate link 52, both sidewalls of the movable groove are respectively connected to both ends of the hinge shaft, the loading link 53 is rotatably connected to the hinge shaft and slidably connected to the hinge shaft, a movable space in which the loading link 53 moves forward and backward with respect to the intermediate link 52 is reserved in the intermediate link 52 at a hinge position of the loading link 53 and the intermediate link 52, and the loading link 53 can move forward and backward with respect to the hinge shaft in addition to being rotatable about the hinge shaft, thereby avoiding an influence on the measurement of the friction force measuring member 61. The front-back distance of the movable slot is not smaller than the distance between the first side wall 6122 and the second side wall 6123, namely, the loading link is always pushed or pulled by the reverser 612 when moving back and forth.
Referring to fig. 3, in an embodiment, the friction force measuring member 61 further includes a mounting frame 613 vertically disposed on the mounting base 1, one end of the pull pressure sensor 611 facing away from the inverter 612 is connected to the mounting frame 613, and the mounting frame 613 can adjust the disposition position and angle of the pull pressure sensor 611, thereby facilitating the measurement of the friction force of the spline nut 300.
Referring to fig. 2, in an embodiment, the link loading mechanism 5 is formed with a receiving groove 50, the receiving groove 50 is provided at the outer circumference of the link 6121, and the width of the receiving groove 50 is larger than the outer diameter of the link 6121. The accommodating groove 50 and the connecting rod 6121 can play a role in positioning during assembly, and it should be noted that, when the connecting rod driving member 4 drives the connecting rod 51 loading mechanism to rotate, the groove width of the accommodating groove 50 is larger than the outer diameter of the connecting rod 6121, and the small-angle rotation of the loading connecting rod 53 does not cause the accommodating groove 50 to contact with the connecting rod 6121, so that interference is not caused to the rotation of the connecting rod loading mechanism 5. Specifically, the receiving slot 50 is formed in an extension 532 of the loading link 53. On the other hand, by providing the structure of the receiving groove 50, the contact area of the loading link 53 with the first and second side walls 6122 and 6123 can be increased, and the stability of the force can be improved.
Referring to fig. 1, in one embodiment, the clamping member 3 includes two sets of oppositely disposed clamping portions 31, and the two sets of clamping portions 31 are respectively used for fixing two ends of the spline shaft 200. The spline shaft 200 is erected and fixed on the two groups of clamping parts 31, and the space below the spline shaft 200 can be used for the front and back movement of the mounting seat 1.
Referring to fig. 1, in an embodiment, the clamping portion 31 includes a clamping seat 311 and a locking block 312 connected to each other, the clamping seat 311 is formed with a first clamping groove, the locking block 312 is formed with a second clamping groove, and the first clamping groove and the second clamping groove are disposed opposite to each other to form a clamping space 315. The spline shaft 200 is clamped in the clamping space 315, the clamp seat 311 and the locking block 312 are of mutually detachable structures, the clamp seat 311 and the locking block 312 can be connected through a threaded fastener, the height of the clamping space 315 can be adjusted through the threaded fastener, the locking degree of the spline shaft 200 is adjusted, and the spline shaft 200 is prevented from being loosened or moved. Wherein, the latch segment 312 sets up at the top of anchor clamps seat 311, and first draw-in groove is positive "V" type, and the second draw-in groove is the type of falling "V", and this structure can block the integral key shaft 200 well to adjust the degree of locking to the integral key shaft 200.
Referring to fig. 1, in an embodiment, the testing device of the spline pair further includes a linear guide rail 8, where the linear guide rail 8 is spaced from the linear driving assembly 2, and the mounting base 1 is slidably connected to the linear guide rail 8. The linear guide rail 8 and the linear driving assembly 2 support the mounting seat 1 from two positions respectively, so that the mounting seat 1 operates more balanced and stable in the linear movement process.
Referring to fig. 1, in an embodiment, the testing device of the spline pair further includes a base 7, and the clamping member 3 and the linear driving assembly 2 are mounted on the base 7. The structure in the foregoing embodiment is directly or indirectly arranged on the base 7, and the overall movement and transportation of the testing device of the spline pair can be realized by moving the base 7, so that the use flexibility is better.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).
Claims (11)
1. A testing device for spline pairs, comprising:
a mounting base;
the linear driving assembly is used for driving the mounting seat to move linearly;
the clamping piece is used for clamping the spline shaft;
the connecting rod driving piece is arranged on the mounting seat;
the connecting rod loading mechanism is in transmission connection with the connecting rod driving piece and is used for being connected with a spline nut, and the connecting rod driving piece drives the spline nut to rotate around the spline shaft through the connecting rod loading mechanism;
the detection assembly comprises a friction force measuring piece and a displacement measuring piece which are respectively arranged on the mounting seat, wherein the friction force measuring piece is connected with the connecting rod loading mechanism, and the displacement measuring piece is used for detecting the rotation distance of the connecting rod loading mechanism.
2. The spline pair testing device according to claim 1, wherein the link loading mechanism comprises a drive link, an intermediate link and a loading link which are sequentially hinged, the link drive member is in driving connection with the drive link, the loading link is used for being connected with the spline nut, and the loading link is connected with the friction force measuring member.
3. The spline pair testing device according to claim 2, wherein in an initial state, a longitudinal direction of the drive link is perpendicular to a longitudinal direction of the intermediate link, and the longitudinal direction of the intermediate link is perpendicular to a longitudinal direction of the load link.
4. A testing device for spline pairs according to claim 3, wherein the loading link comprises a connecting section and an extension section, the connecting section comprises a first section, a second section and a third section, the first section, the second section and the third section are connected in sequence, the first section is hinged with the intermediate link, the second section is used for being connected with the spline nut, the third section is connected with the extension section, the extension section is connected with the friction force measuring member, and the displacement measuring member is used for detecting the rotation distance of the extension section.
5. The spline pair testing device according to claim 2, wherein the intermediate link is formed with a movable groove, both side walls of the movable groove are respectively connected to both ends of the hinge shaft, and the loading link is rotatably connected to the hinge shaft and slidably connected to the hinge shaft.
6. The spline pair testing device according to claim 1, wherein the friction force measuring member includes a pull pressure sensor and a reverser, the reverser is connected with the pull pressure sensor, the reverser includes a connecting rod and a first side wall and a second side wall respectively provided at both ends of the connecting rod, and the connecting rod loading mechanism is used for abutting with the first side wall or the second side wall.
7. The spline pair testing device according to claim 6, wherein the link loading mechanism is formed with a receiving groove provided at an outer periphery of the link, and a width of the receiving groove is larger than an outer diameter of the link.
8. The spline pair testing device according to claim 1, wherein the clamping member includes two sets of oppositely disposed clamping portions, the two sets of clamping portions being respectively used for fixing both ends of the spline shaft.
9. The spline pair testing device according to claim 8, wherein the clamping portion includes a clamp seat and a locking block that are connected to each other, the clamp seat is formed with a first clamping groove, the locking block is formed with a second clamping groove, and the first clamping groove and the second clamping groove are arranged facing each other to form a clamping space together.
10. The spline pair testing device of any one of claims 1 to 9, further comprising a base, wherein the clamp and the linear drive assembly are both mounted to the base.
11. The spline pair testing device according to any one of claims 1 to 9, further comprising a linear guide rail disposed in spaced relation to the linear drive assembly, the mounting seat being slidably connected to the linear guide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311552134.XA CN117571309A (en) | 2023-11-20 | 2023-11-20 | Testing device for spline pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311552134.XA CN117571309A (en) | 2023-11-20 | 2023-11-20 | Testing device for spline pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117571309A true CN117571309A (en) | 2024-02-20 |
Family
ID=89860151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311552134.XA Withdrawn CN117571309A (en) | 2023-11-20 | 2023-11-20 | Testing device for spline pair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117571309A (en) |
-
2023
- 2023-11-20 CN CN202311552134.XA patent/CN117571309A/en not_active Withdrawn
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Application publication date: 20240220 |