CN115930739A - Device for measuring axial clearance of differential half shaft gear - Google Patents
Device for measuring axial clearance of differential half shaft gear Download PDFInfo
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- CN115930739A CN115930739A CN202211555554.9A CN202211555554A CN115930739A CN 115930739 A CN115930739 A CN 115930739A CN 202211555554 A CN202211555554 A CN 202211555554A CN 115930739 A CN115930739 A CN 115930739A
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Abstract
The invention provides a device for measuring axial clearance of a differential side gear, which comprises: the slewing mechanism comprises a main shaft driven by a slewing driving mechanism to rotate; the locking mechanism comprises a split type tensioning mechanism and an unlocking cylinder; when the unlocking cylinder extends downwards and abuts against the top end of the tension shaft, a gap is reserved between the tension sleeve of the split tension mechanism and the half axle gear to unlock the half axle gear; when the unlocking cylinder retracts upwards to be separated from the tension shaft, the tension sleeve tightly holds the inner hole wall of the half axle gear to fix the half axle gear, and forms a synchronous rotating component together with the main shaft; the axial clearance measuring mechanism is used for driving the vertical reciprocating displacement of the half axle gear; and the detection mechanism comprises a position detection switch for detecting the upper limit position and the lower limit position of the side gear in the driving process of the axial clearance measuring mechanism. The invention can realize dynamic measurement of the axial clearance of the semi-axis gear, improves the measurement precision and has better compatibility.
Description
Technical Field
The invention relates to a device for measuring axial clearance of a differential side gear.
Background
The general main part of the mode of current measurement differential mechanism semi-axis gear axle clearance falls into two kinds:
1. manually leading the measurement, and using a transition tool to shift the half axle gear by hand to move up and down in the shell to measure the gap; there are many errors in this approach: a. a gap exists between the transition tool and the half axle gear in a fitting manner, and a large error exists during displacement transmission; b. when manual measurement is carried out, the shifting effect is inconsistent, and the shifting range is influenced by the shifting force, so that the measurement error is increased; c. when the half axle gear moves, a meshing gap exists between the half axle gear and the planet gear, the gap cannot be met manually, and a measurement error exists; d. the manual measurement items are respectively an upper limit position and a lower limit position of the half axle gear, and the measurement clearance value covers factors such as the whole clearance of the planetary gear, the linear shaft and the differential shell, and the measured value is not true;
2. the method is characterized in that measurement is carried out by conventional equipment, a measuring pressure head and a shifting fork structure is adopted, the pressure head and the shifting fork are utilized to extrude the half axle gear to reach a relative position, a result value is obtained by utilizing a dynamic measurement and static measurement mode, during dynamic measurement, the pressure head is utilized to press the half axle gear for dynamic acquisition, and during the process, the shifting is separated from a working condition, so that a real-time value cannot be completely fed back, and certain influence is caused on the measurement; during static measurement, the number of sampling points is small, and the measurement data is insufficient, so that the measurement error is increased; on the whole structure, the product adaptability is low, and the environment of multiple varieties compatibility in the current market cannot be met.
Disclosure of Invention
The present invention aims to solve the above technical problem at least to some extent. Therefore, the invention provides a device for measuring the axial clearance of the differential half shaft gear, which realizes the dynamic measurement of the axial clearance of the half shaft gear, improves the measurement precision and has better compatibility.
In order to realize the purpose, the invention adopts the following technical scheme:
a device for differential side gear axial clearance measurement, the workpiece to be measured being a side gear assembled in a differential assembly housing, the device comprising:
the slewing mechanism comprises a synchronous slewing component consisting of a plurality of coaxially sleeved shaft bodies; in the synchronous rotating component, a main shaft is a shaft body with the smallest diameter and is provided with an axially through center hole;
the locking mechanism is used for fixing and unlocking the semi-axis gear and comprises a split type tensioning mechanism and an unlocking cylinder; the split type tensioning mechanism comprises a tensioning shaft, a tensioning cone, a tensioning sleeve and a tensioning spring which are coaxially arranged with the main shaft; the tensioning shaft penetrates through a central hole of the main shaft, a gap is reserved between the tensioning shaft and the main shaft in the radial direction, the tensioning shaft is driven by an unlocking cylinder right above the tensioning shaft to be displaceable along the axial direction, a tensioning spring is sleeved at the upper end of the tensioning shaft, a tensioning cone with a big end facing downwards is fixedly installed at the bottom end of the tensioning shaft, the tensioning sleeve is matched with the tensioning cone and sleeved at the bottom end of the tensioning shaft and outside the tensioning cone, and the top end of the tensioning shaft is fixedly connected with the bottom end of the main shaft; the overall structure consisting of the tension shaft, the tension cone and the tension sleeve exposed below the device can be sheathed in the inner hole of the half axle gear right below in a matched manner; when the unlocking cylinder extends downwards and abuts against the top end of the tension shaft, a gap is reserved between the outer peripheral wall of the tension sleeve and the radial direction of the inner hole wall of the half axle gear, and the half axle gear is unlocked; when the unlocking cylinder retracts upwards to separate from the tension shaft, the tension of the tension sleeve is paired by means of the elasticity of the tension spring and the upward tension cone of the tension shaft, the tension sleeve tightly holds the inner hole wall of the half axle gear, and the synchronous moving member and the half axle gear form a synchronous moving member to fix the half axle gear;
the rotation driving mechanism is used for providing rotation driving force by a servo motor, driving the synchronous rotation member and the half axle gear to keep rotating in the measuring process through transmission of a transmission mechanism, and is provided with a torque sensor for detecting output torque;
the axial clearance measuring mechanism drives the synchronous rotating member, the rotating driving mechanism, the split type tensioning mechanism and the half axle gear to integrally vertically reciprocate through the vertical driving cylinder, is provided with a tension and pressure sensor and a precise pressure regulating valve, and is respectively used for detecting and regulating the loading force of the vertical driving cylinder;
and the detection mechanism comprises a position detection switch for detecting the upper limit position and the lower limit position of the side gear in the driving process of the axial clearance measuring mechanism.
The invention also has the structural characteristics that:
the rotary driving mechanism comprises a servo motor, a speed reducer, a torque sensor and a transmission mechanism;
the servo motor shaft is directly connected with an input shaft of a speed reducer, an output shaft of the speed reducer is used as a power shaft, the transmission mechanism is a synchronous belt transmission mechanism, two ends of the torque sensor are respectively coaxially connected with the power shaft and a driving pulley wheel shaft of the synchronous belt transmission mechanism through a coupler, and a driven pulley of the synchronous belt transmission mechanism is coaxially and fixedly connected with the synchronous rotary member.
In the slewing mechanism:
the synchronous rotation component sequentially comprises a main shaft, a rotating shaft and a reference shaft according to the sequence from small diameter to large diameter, the rotating shaft is fixedly sleeved at the upper end of the main shaft, the reference shaft is fixedly sleeved at the lower end of the main shaft, the rotating shaft is coaxially and fixedly assembled with the output end of the transmission mechanism, and the reference shaft is installed in the main seat.
The upper end of the main shaft is fixedly connected with a spring limiting dead stop through a spring guide sleeve and is coaxial with the spring limiting dead stop, a tensioning spring sleeved at the upper end part of the tensioning shaft is accommodated between the spring guide sleeve and the tensioning shaft in a matching manner, the top end of the tensioning spring is fixedly connected with a spring seat movably sleeved at the top of the tensioning shaft, the spring guide sleeve provides axial deformation guide, and the spring guide sleeve and the spring limiting dead stop are surrounded to form a space for the spring seat to reciprocate along the axial direction of the tensioning shaft and are respectively used as an upper limit and a lower limit of the spring seat; the top end of the spring guide sleeve and the spring limiting dead block are fastened through an adjusting bolt, and the vertical distance between the top end of the spring guide sleeve and the spring limiting dead block is adjustable through the adjusting bolt.
In the locking mechanism:
the unlocking cylinder is inverted and hoisted right above the tensioning shaft, and is independent of the vertical reciprocating displacement motion driven by the axial clearance measuring mechanism in the retracting state;
in the split type tensioning mechanism, the tensioning cone is fixedly arranged at the bottom end of the tensioning shaft through a fastening screw, and the inner hole wall of the contact part of the tensioning sleeve and the tensioning cone is matched with the external dimension of the peripheral wall of the tensioning cone.
The axial clearance measuring mechanism further comprises a guide bearing, and the guide bearing is matched with the reference shaft and used for guiding the vertical reciprocating displacement motion.
The axial clearance measuring mechanism also comprises at least one pair of limiting assemblies which are equidistantly and uniformly distributed along the circumferential direction, and each limiting assembly comprises a limiting shaft, a limiting spring and a limiting block;
the stopper is external, fixed mounting is on the basic shaft, spacing axle is along with the vertical synchronous vertical displacement of drive actuating cylinder's of driving, and the axis body runs through the stopper to on the axis body, be located a pair of limit baffle is established to the punishment in the below of stopper, establish through the cover between lower extreme and a pair of limit baffle on the stopper a pair of spacing spring on the spacing axle links to each other, through the stopper is right the vertical displacement of spacing axle carries on spacingly, relies on spacing spring realizes the restoration of spacing axle.
The detection mechanism includes:
the detection end of the upper limit position detection switch is opposite to an upper limit baffle which vertically moves to an upper limit position along with the upper limit shaft, so that the semi-axis gear is detected to reach the upper limit position;
and the detection end of the lower limit position detection switch is opposite to a lower limit baffle which vertically moves downwards along with the limit shaft to the lower limit position, so that the detection that the semi-axis gear reaches the lower limit position is formed.
The detection mechanism further includes:
measuring transducer and measuring block, measuring block is external, the fastening is on the reference shaft for the displacement of transmission reference shaft, measuring transducer is located directly over the measuring block, and the sense terminal is just to measuring block for at the axial clearance measuring mechanism drive in-process, to the measurement of semi-axis gear relative movement clearance.
The device comprises a dead-stop bolt assembly, a bolt cylinder, a bolt in-situ detection switch and a bolt working position detection switch, wherein the dead-stop bolt assembly comprises a counter-force mounting frame with a counter-force roller, a telescopic dead-stop bolt driven by the bolt cylinder, and a bolt in-situ detection switch and a bolt working position detection switch;
the counter-force mounting bracket links firmly on the basic shaft, and the overhanging one end outside is rotated and is installed the counter-force gyro wheel, the dead fender bolt can be driven by the bolt cylinder, or stretch out to the work position and hold in the palm and keep off in counter-force gyro wheel lower extreme, detects target in place by bolt work position detection switch, or retract to the normal position and break away from the counter-force gyro wheel, detects the position by bolt normal position detection switch.
Compared with the prior art, the invention has the beneficial effects that:
the invention is applied to the automatic measurement of the differential mechanism in the production line of the gearbox assembly, measures the axial movement clearance of the half axle gear in the differential mechanism assembly through dynamic test, is used for judging the qualified state of the differential mechanism assembly, screening out unqualified products, ensuring the product quality, and improves the measurement precision through optimizing the measurement tool, and the advantages of the invention comprise that:
1. compared with the existing connection mode of a spline and a shifting fork, the split type tensioning mechanism of the locking mechanism is connected with the half axle gear, and the tensioning force is provided by the tensioning spring, so that the compatibility and interchangeability of the device to different varieties are improved, the positioning precision is optimized, and the measurement precision is improved; meanwhile, the unlocking cylinder of the locking mechanism is utilized to fix/unlock the workpiece to be measured, so that unlocking force is provided, and the workpiece can be stably connected;
2. the vertical driving cylinder of the axial clearance measuring mechanism is used for driving the half axle gear to do relative vertical movement in the differential assembly shell, in the process, the split type tensioning mechanism is matched in an auxiliary mode, the tensioning spring is used for transferring the rigid force of the vertical driving cylinder to the half axle gear, the tension pressure sensor is used for feeding back the loading force, the precision pressure regulating valve is used for regulating the loading force, finally the displacement sensor is used for collecting data, and the vertical driving cylinder, the precision pressure regulating valve and the tension pressure sensor are fed back and coordinated, so that the measuring precision is improved, and the force is favorably coordinated and fed back;
3. under the action of a rotary driving mechanism, compared with the existing static measurement mode, the measurement state can be ensured to be dynamic through cooperative matching of all parts, and the dynamic whole-circle sampling is optimized from the previous static single-point value taking, so that the sampling points are increased; and the rotary driving mechanism adopts a servo motor to drive the half axle gear to rotate, and compared with a previous step motor, the rotary driving mechanism can better control related measurement parameters such as rotating speed, time, number of turns and the like, obtain a relatively stable dynamic environment, ensure that the measurement process is periodic, utilize periodic sampling data, avoid sampling randomness to generate larger influence on the measurement result, and further improve the measurement precision.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic diagram of the right-hand side view of the present invention;
FIG. 3 isbase:Sub>A schematic sectional view of the structure of FIG. 2 taken along line A-A;
FIG. 4 is a schematic left side view of the present invention;
FIG. 5 is a perspective isometric view of the present invention;
FIG. 6 is a perspective, isometric view of another aspect of the present invention;
fig. 7 is a schematic structural view of a dead stop bolt and a bolt cylinder in the dead stop bolt assembly.
In the figure, 1 main axis; 2, rotating a shaft; 3 reference axis; 4, a bearing; 5 bearing cover plate; 6 locking the nut; 7, unlocking the cylinder; 8, unlocking the cylinder mounting plate; 9 upright posts; 10, tensioning the shaft; 11, tensioning the cone; 12, tensioning and sleeving; 13 tensioning the spring; 14 a spring guide sleeve; 15, limiting a dead stop by a spring; 16 spring seats; 17 adjusting the bolt; 18 servo motor; 19 a speed reducer; 20 a torque sensor; 21 a coupler; 22 a drive pulley; 23 a driven pulley; 24 origin position detection switches; 25, mounting a speed reducer plate; 26 vertically driving the cylinder; 27 pull pressure sensor; 28 pulling the pressure sensor support plate; 29 a limiting shaft; 30 a limiting block; 31 limiting baffle plates; 32 a limit spring; 33 upper limit position detection switch; 34 a lower limit position detection switch; 35 a measurement sensor; 36 measuring blocks; 37 a reaction force mounting bracket; 38 a counter force roller; 39 a latch cylinder; 40 dead stop bolts; 41, a plug pin working position detection switch; a 42 bolt in-situ detection switch; 43 a transition support; 44 a mounting seat; 45, a power-assisted pulley; 46 a measuring seat; 47 a guide bearing; 48 main seats.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 7, a workpiece to be measured is a side gear assembled in a differential assembly case, and the device for measuring axial clearance of a differential side gear of the present embodiment includes:
the slewing mechanism comprises a synchronous slewing component consisting of a plurality of coaxially sleeved shaft bodies; in the synchronous rotating component, a main shaft 1 is a shaft body with the smallest diameter and is provided with an axially through central hole;
the locking mechanism is used for fixing and unlocking the semi-axis gear and comprises a split type tensioning mechanism and an unlocking cylinder 7; the split type tensioning mechanism comprises a tensioning shaft 10, a tensioning cone 11, a tensioning sleeve 12 and a tensioning spring 13 which are coaxially arranged with the main shaft 1; the tensioning shaft 10 is arranged in a central hole of the main shaft 1 in a penetrating manner, a gap is reserved between the tensioning shaft and the main shaft in the radial direction, the tensioning shaft is driven by the unlocking cylinder 7 right above and can move along the axial direction, a tensioning spring 13 is sleeved at the upper end of the tensioning shaft, a tensioning cone 11 with the big end downward is fixedly arranged at the bottom end of the tensioning shaft, the tensioning sleeve 12 is matched with the tensioning cone 11 and sleeved outside the bottom end of the tensioning shaft 10 and the tensioning cone 11, and the top end of the tensioning shaft is fixedly connected with the bottom end of the main shaft 1; the overall structure consisting of the parts of the tension shaft 10, the tension cone 11 and the tension sleeve 12 exposed below the device can be sheathed in the inner hole of the half axle gear right below in a matching way; when the unlocking cylinder 7 extends downwards and abuts against the top end of the tension shaft 10, a gap is reserved between the outer peripheral wall of the tension sleeve 12 and the radial direction of the inner hole wall of the half axle gear, so that the half axle gear is unlocked; when the unlocking cylinder 7 retracts upwards to be separated from the tension shaft 10, the tension sleeve 12 is tensioned by the aid of the elastic force of the tension spring 13 and the tension cone 11 ascending upwards along the tension shaft 10, the tensioned tension sleeve 12 tightly holds the inner hole wall of the half axle gear and forms a synchronous moving member with the half axle gear to fix the half axle gear;
the rotary driving mechanism is provided with rotary driving force by a servo motor 18, drives the synchronous rotary component and the half-axle gear to keep rotating in the measuring process through transmission of a transmission mechanism, and is provided with a torque sensor 20 for detecting output torque;
the axial clearance measuring mechanism drives the synchronous rotating member, the rotating driving mechanism, the split type tensioning mechanism and the half axle gear to integrally and vertically reciprocate through a vertical driving cylinder 26 fixed on the unlocking cylinder mounting plate 8, and is provided with a tension pressure sensor 27 and a precise pressure regulating valve which are respectively used for detecting and regulating the loading force of the vertical driving cylinder 26;
and the detection mechanism comprises a position detection switch for detecting the upper limit position and the lower limit position of the side gear in the driving process of the axial clearance measuring mechanism.
The structural arrangement of the device also includes:
the rotary driving mechanism comprises a servo motor 18, a speed reducer 19, a torque sensor 20 and a transmission mechanism;
the motor shaft of the servo motor 18 is directly connected with the input shaft of a speed reducer 19 fixedly arranged on a speed reducer mounting plate 25, the output shaft of the speed reducer 19 is used as a power shaft, a transmission mechanism is a synchronous belt transmission mechanism, two ends of a torque sensor 20 are respectively coaxially connected with the power shaft and a driving belt pulley 22 wheel shaft of the synchronous belt transmission mechanism through a coupler 21, and a driven belt pulley 23 of the synchronous belt transmission mechanism is coaxially and fixedly connected with a synchronous rotary member.
In the slewing mechanism:
the synchronous rotation component sequentially comprises a main shaft 1, a rotating shaft 2 and a reference shaft 3 according to the sequence from small diameter to large diameter, the rotating shaft 2 is fixedly sleeved at the upper end of the main shaft 1 and is connected with the rotating shaft 2 through a key, the reference shaft 3 is fixedly sleeved at the lower end of the main shaft, the rotating shaft 2 is coaxially and fixedly assembled with the output end of a transmission mechanism, the reference shaft 3 is installed in a main seat 48 and is locked with the main shaft 1 through a bearing 4, a bearing cover plate 5 and a locking nut 6.
The upper end of the main shaft 1 is fixedly connected with a spring limiting dead stop 15 through a spring guide sleeve 14 and is coaxial with the spring limiting dead stop 15, a tension spring 13 sleeved at the upper end part of a tension shaft 10 is accommodated between the spring guide sleeve 14 and the tension shaft 10 in a matched manner, the top end of the tension spring is fixedly connected with a spring seat 16 movably sleeved at the top of the tension shaft 10, the spring guide sleeve 14 provides guidance for axial deformation, the spring guide sleeve 14 and the spring limiting dead stop 15 are arranged in an enclosing manner to form a space for the spring seat 16 to axially reciprocate along the tension shaft 10, and the space is respectively used as an upper limiting position and a lower limiting position of the spring seat 16; the top end of the spring guide sleeve 14 is fastened with the spring limiting dead stop 15 through an adjusting bolt 17, and the vertical distance between the top end of the spring guide sleeve and the spring limiting dead stop 15 is adjustable through the adjusting bolt 17 and is used as a spring tension force adjusting mechanism of the tension spring 13 to prevent the tension sleeve 12 from being damaged due to idle expansion.
In the locking mechanism:
the unlocking cylinder 7 is inverted, hung above the tensioning shaft 10, connected with the upright post 9 through the unlocking cylinder mounting plate 8, located above the main shaft 1 and independent of the vertical reciprocating displacement motion driven by the axial clearance measuring mechanism in the retraction state;
in the split type tensioning mechanism, a tensioning cone 11 is fixedly arranged at the bottom end of a tensioning shaft 10 through a fastening screw, and the inner hole wall of the contact part of a tensioning sleeve 12 and the tensioning cone 11 is matched with the external dimension of the external peripheral wall of the tensioning cone 11.
The axial clearance measuring mechanism further comprises a guide bearing 474, cooperating with the reference shaft 3, for guiding the vertical reciprocating displacement movement. Specifically, the two ends of the tension and pressure sensor 27 are respectively connected with the vertical driving cylinder 26 and the tension and pressure sensor support plate 28, the tension and pressure sensor support plate 28 is matched with the limit block 30 through the limit shaft 29, and the linear bearing 4 is used for motion guiding.
The axial clearance measuring mechanism also comprises at least one pair of limiting components which are uniformly distributed along the circumferential direction at equal intervals, and each limiting component comprises a limiting shaft 29, a limiting spring 32 and a limiting block 30;
the limiting block 30 is externally arranged and fixedly installed on the reference shaft 3, the limiting shaft 29 is driven by the vertical driving cylinder 26 to synchronously vertically displace, the shaft body penetrates through the limiting block 30, a pair of limiting baffles 31 are arranged on the shaft body and positioned above and below the limiting block 30, the upper end and the lower end of the limiting block 30 are connected with the pair of limiting baffles 31 through a pair of limiting springs 32 sleeved on the limiting shaft 29, the limiting block 30 limits the vertical displacement of the limiting shaft 29, and the resetting of the limiting shaft 29 is realized by the limiting springs 32.
The detection mechanism includes:
the detection end of the upper limit position detection switch 33 is opposite to the upper limit baffle 31 which vertically moves upwards along with the limit shaft 29 to reach the upper limit position, so that the detection that the semi-axis gear reaches the upper limit position is formed;
and the detection end of the lower limit position detection switch 34 is just opposite to the lower limit baffle 31 which vertically moves downwards along with the limit shaft 29 to reach the lower limit position, so that the detection that the semi-axis gear reaches the lower limit position is formed.
The detection mechanism further comprises:
the measuring sensor 35 and the measuring block 36, the measuring block 36 is externally arranged and fastened on the reference shaft 3 and used for transmitting the displacement of the reference shaft 3, the measuring sensor 35 is located right above the measuring block 36, and the detection end is right opposite to the measuring block 36 and used for measuring the relative movement gap of the semi-axis gear in the driving process of the axial gap measuring mechanism.
Further, an origin position detection switch 24 for servo origin detection may be provided for the servo motor 18. The working state of the vertical driving cylinder 26 is fed back by using each position detection switch and the measuring sensor 35 to form a closed-loop monitoring of the vertical movement.
The device for measuring the axial clearance of the differential gear half shaft gear further comprises a dead stop bolt 40 assembly, wherein the dead stop bolt 40 assembly comprises a counter force mounting frame 37 with a counter force roller 38, a telescopic dead stop bolt 40 driven by a bolt cylinder 39, a bolt in-situ detection switch 42 and a bolt working position detection switch 41;
the counter-force mounting frame 37 is fixedly connected to the reference shaft 3, one end of the counter-force mounting frame which is overhung is rotatably provided with a counter-force roller 38, the dead-stop bolt 40 and the bolt cylinder 39 are fixedly arranged on the main base 48 and can be driven by the bolt cylinder 39 or extend to a working position and are supported and stopped at the lower end of the counter-force roller 38, and at the moment, the dead-stop bolt is detected in place by the bolt working position detection switch 41 and is used for overcoming the unlocking cylinder 7, limiting the original position of the reference shaft 3 and avoiding adverse effects on a measurement result due to dead limit of a stroke; or retracted to a home position and disengaged from the reaction roller 38, as detected by the latch home position detection switch 42. In addition, a transition support 43 with a mounting seat 44 is further arranged on the main seat 48, a through slot is formed in the mounting seat 44, the dead stop bolt 40 stretches and retracts along the slot, an assisting pulley 45 is further arranged on the transition support 43 at the position below the slot, and the periphery of an outer wheel is in rolling contact with the bottom end of the dead stop bolt 40 passing through the bolt and is used for assisting the dead stop bolt 40 in stretching and retracting.
The working principle is as follows:
the device uses the servo motor 18 as a power source, so that the stability of a dynamic measurement environment is ensured; secondly, a split type tensioning mechanism is adopted to tension the workpiece, the spring force of a tensioning spring 13 is utilized to provide tensioning force for tightly holding the half axle gear by the tensioning sleeve 12, and the vertical driving cylinder 26 is utilized to drive the half axle gear to vertically move so as to realize the relative movement of the half axle gear in the shell of the differential assembly; thirdly, the tension and pressure sensor 27 and other detection elements are used in a matched mode to monitor the loading force of the semi-axial gear and the like, and parametric management of the measurement environment is achieved.
Based on the above, the device has the following advantages: 1. by adopting dynamic measurement, enough data can be ensured to be obtained during data acquisition so as to be used for analyzing the equipment state and determining the measurement result; 2. the expansion sleeve type structure is adopted, the half axle gear and the measuring device are integrated, data are transmitted in real time, and measuring errors caused by relative motion are avoided; 3. structurally, a locking mechanism with a quick-change structure is adopted, and a universal split type tensioning mechanism is utilized, so that the equipment can adapt to multiple machine type products; 4. the design is provided with a tension pressure sensor 27, a torque sensor 20 and the like, so that multifunctional measurement is further realized, and meanwhile, the measurement parameterization display of the equipment is realized by utilizing the sensors, so that the reliability of the equipment is improved.
The working process can refer to the following steps:
1. after the differential mechanism is fixed, on the premise of keeping the synchronous rotating component coaxial with the workpiece, the unlocking cylinder 7 extends downwards to press the workpiece, and at the moment, the dead stop bolt 40 is in a working position;
2. the unlocking cylinder 7 retracts upwards, the tension shaft 10 drives the tension cone 11 to move upwards under the elastic force of the tension spring 13, so that the tension sleeve 12 deforms, is tensioned and tightly holds the inner hole wall of the half axle gear and is relatively fixed with the half axle gear;
3. the bolt cylinder 39 drives the dead gear bolt 40 to retract to the original position, and the dead gear limit is removed;
4. the servo motor 18 is driven, is decelerated through a speed reducer 19, and is transmitted through a transmission mechanism to drive the synchronous rotating component and the half axle gear to rotate;
5. the vertical driving cylinder 26 retracts to the right position, drives the half axle gear, the reference shaft 3, the limiting block 30 and the measuring block 36 on the reference shaft to move to the upper limit position, and collects displacement data through the upper limit position detection switch 33 and the measuring sensor 35;
6. the vertical driving cylinder 26 extends to a proper position to drive the half axle gear, the reference shaft 3, the limiting block 30 and the measuring block 36 on the reference shaft to move to a lower limit position, and displacement data are acquired through the lower limit position detection switch 34 and the measuring sensor 35;
7. the servo motor 18 is stopped;
8. the vertical drive cylinder 26 is retracted to the home position;
9. the bolt cylinder 39 drives the dead gear bolt 40 to extend to a working position;
10. the unlocking cylinder 7 extends downwards to unlock the tensioning sleeve 12, so that the tensioning sleeve is separated from the half axle gear;
11. and analyzing the data collected above.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A device for differential side gear axial clearance measurement, characterized by, the work piece of measureing is the side gear of assembly in differential mechanism casing, and the device includes:
the slewing mechanism comprises a synchronous slewing component consisting of a plurality of coaxially sleeved shaft bodies; in the synchronous rotating component, a main shaft is a shaft body with the smallest diameter and is provided with an axially through center hole;
the locking mechanism is used for fixing and unlocking the semi-axis gear and comprises a split type tensioning mechanism and an unlocking cylinder; the split type tensioning mechanism comprises a tensioning shaft, a tensioning cone, a tensioning sleeve and a tensioning spring which are coaxially arranged with the main shaft; the tensioning shaft penetrates through a central hole of the main shaft, a gap is reserved between the tensioning shaft and the main shaft in the radial direction, the tensioning shaft is driven by an unlocking cylinder right above the tensioning shaft to be displaceable along the axial direction, a tensioning spring is sleeved at the upper end of the tensioning shaft, a tensioning cone with a big end facing downwards is fixedly installed at the bottom end of the tensioning shaft, the tensioning sleeve is matched with the tensioning cone and sleeved at the bottom end of the tensioning shaft and outside the tensioning cone, and the top end of the tensioning shaft is fixedly connected with the bottom end of the main shaft; the whole structure consisting of the tension shaft, the tension cone and the part of the tension sleeve exposed below the device can be sheathed in the inner hole of the half axle gear right below in a matching way; when the unlocking cylinder extends downwards and abuts against the top end of the tension shaft, a gap is reserved between the outer peripheral wall of the tension sleeve and the radial direction of the inner hole wall of the half axle gear, and the half axle gear is unlocked; when the unlocking cylinder retracts upwards to be separated from the tension shaft, the tension sleeve is tensioned along with the upward tension cone of the tension shaft by means of the elasticity of the tension spring, the inner hole wall of the half axle gear is tightly embraced by the tension sleeve, and a synchronous moving member is formed by the tension sleeve and the half axle gear to fix the half axle gear;
the rotary driving mechanism is driven by the transmission mechanism to drive the synchronous rotary component and the half-axle gear to keep rotating in the measuring process by providing rotary driving force by the servo motor, and is provided with a torque sensor for detecting output torque;
the axial clearance measuring mechanism drives the synchronous rotating component, the rotating driving mechanism, the split type tensioning mechanism and the half axle gear to integrally and vertically reciprocate through the vertical driving cylinder, and is provided with a tension pressure sensor and a precise pressure regulating valve which are respectively used for detecting and regulating the loading force of the vertical driving cylinder;
and the detection mechanism comprises a position detection switch for detecting the upper limit position and the lower limit position of the side gear in the driving process of the axial clearance measuring mechanism.
2. The differential side gear axial clearance measuring device of claim 1, wherein:
the rotary driving mechanism comprises a servo motor, a speed reducer, a torque sensor and a transmission mechanism;
the servo motor shaft is directly connected with an input shaft of a speed reducer, an output shaft of the speed reducer is used as a power shaft, the transmission mechanism is a synchronous belt transmission mechanism, two ends of the torque sensor are respectively coaxially connected with the power shaft and a driving pulley wheel shaft of the synchronous belt transmission mechanism through a coupler, and a driven pulley of the synchronous belt transmission mechanism is coaxially and fixedly connected with the synchronous rotary member.
3. The device for differential side gear axial clearance measurement as claimed in claim 1, wherein in said slewing mechanism:
the synchronous rotation component sequentially comprises a main shaft, a rotating shaft and a reference shaft according to the sequence from small diameter to large diameter, the rotating shaft is fixedly sleeved at the upper end of the main shaft, the reference shaft is fixedly sleeved at the lower end of the main shaft, the rotating shaft is coaxially and fixedly assembled with the output end of the transmission mechanism, and the reference shaft is installed in the main seat.
4. The device for differential side gear axial clearance measurement according to claim 1 or 3, wherein: the upper end of the main shaft is fixedly connected with a spring limiting dead stop through a spring guide sleeve and is coaxial with the spring limiting dead stop, a tensioning spring sleeved at the upper end part of the tensioning shaft is accommodated between the spring guide sleeve and the tensioning shaft in a matching manner, the top end of the tensioning spring is fixedly connected with a spring seat movably sleeved at the top of the tensioning shaft, the spring guide sleeve provides axial deformation guide, and the spring guide sleeve and the spring limiting dead stop are surrounded to form a space for the spring seat to reciprocate along the axial direction of the tensioning shaft and are respectively used as an upper limit and a lower limit of the spring seat; the top end of the spring guide sleeve and the spring limiting dead block are fastened through an adjusting bolt, and the vertical distance between the top end of the spring guide sleeve and the spring limiting dead block is adjustable through the adjusting bolt.
5. The device for differential side gear axial clearance measurement according to claim 1, wherein in the locking mechanism:
the unlocking cylinder is inverted and hoisted right above the tensioning shaft, and is independent of the vertical reciprocating displacement motion driven by the axial clearance measuring mechanism in the retracting state;
in the split type tensioning mechanism, the tensioning cone is fixedly arranged at the bottom end of the tensioning shaft through a fastening screw, and the inner hole wall of the contact part of the tensioning sleeve and the tensioning cone is matched with the external dimension of the peripheral wall of the tensioning cone.
6. The differential side gear axial clearance measuring device of claim 1, wherein:
the axial clearance measuring mechanism further comprises a guide bearing, and the guide bearing is matched with the reference shaft and used for guiding the vertical reciprocating displacement motion.
7. The differential side gear axial clearance measuring device of claim 1, wherein:
the axial clearance measuring mechanism also comprises at least one pair of limiting assemblies which are uniformly distributed along the circumferential direction at equal intervals, and each limiting assembly comprises a limiting shaft, a limiting spring and a limiting block;
the stopper is external, fixed mounting is epaxial on the benchmark, spacing axle is along with the vertical synchronous vertical displacement of drive actuating cylinder's drive, and the axis body runs through the stopper to on the axis body, be located a pair of limit baffle is established in the punishment of the upper and lower side of stopper, establish through the cover between lower extreme and a pair of limit baffle spacing epaxial a pair of spacing spring links to each other, through the stopper is right spacing is carried out to the vertical displacement of spacing axle, relies on spacing spring realizes the reseing of spacing axle.
8. The differential side gear axial clearance measuring device of claim 7, wherein: the detection mechanism includes:
the detection end of the upper limit position detection switch is opposite to an upper limit baffle which vertically moves to an upper limit position along with the upper limit shaft, so that the semi-axis gear is detected to reach the upper limit position;
and the detection end of the lower limit position detection switch is opposite to a lower limit baffle plate which vertically moves downwards along with the limit shaft to the lower limit position, so that the detection that the semi-axis gear reaches the lower limit position is formed.
9. The differential side gear axial clearance measuring device of claim 1, wherein said sensing mechanism further comprises:
measuring transducer and measuring block, measuring block is external, the fastening is on the reference axis for the displacement of transmission reference axis, measuring transducer is located measuring block directly over, and the sense terminal is just to measuring block, is used for at the axial clearance measuring mechanism drive in-process, the measurement to semi-axis gear relative movement clearance.
10. The differential side gear axial clearance measuring device of claim 1, wherein: the device also comprises a dead-stop bolt component, wherein the dead-stop bolt component comprises a counter-force mounting frame with a counter-force roller, a telescopic dead-stop bolt driven by a bolt cylinder, a bolt in-situ detection switch and a bolt working position detection switch;
the counter-force mounting bracket links firmly on the basic shaft, and the overhanging one end outside is rotated and is installed the counter-force gyro wheel, the dead fender bolt can be driven by the bolt cylinder, or stretch out to the work position and hold in the palm and keep off in counter-force gyro wheel lower extreme, detects target in place by bolt work position detection switch, or retract to the normal position and break away from the counter-force gyro wheel, detects the position by bolt normal position detection switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211555554.9A CN115930739A (en) | 2022-12-06 | 2022-12-06 | Device for measuring axial clearance of differential half shaft gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211555554.9A CN115930739A (en) | 2022-12-06 | 2022-12-06 | Device for measuring axial clearance of differential half shaft gear |
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| Publication Number | Publication Date |
|---|---|
| CN115930739A true CN115930739A (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211555554.9A Pending CN115930739A (en) | 2022-12-06 | 2022-12-06 | Device for measuring axial clearance of differential half shaft gear |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117433475A (en) * | 2023-12-20 | 2024-01-23 | 南京泰普森自动化设备有限公司 | Differential clearance measurement device |
| CN117433474A (en) * | 2023-12-11 | 2024-01-23 | 常州市昌隆电机股份有限公司 | Motor axial clearance and shaft extension size detection device |
-
2022
- 2022-12-06 CN CN202211555554.9A patent/CN115930739A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117433474A (en) * | 2023-12-11 | 2024-01-23 | 常州市昌隆电机股份有限公司 | Motor axial clearance and shaft extension size detection device |
| CN117433474B (en) * | 2023-12-11 | 2024-02-20 | 常州市昌隆电机股份有限公司 | Motor axial clearance and shaft extension size detection device |
| CN117433475A (en) * | 2023-12-20 | 2024-01-23 | 南京泰普森自动化设备有限公司 | Differential clearance measurement device |
| CN117433475B (en) * | 2023-12-20 | 2024-04-09 | 南京泰普森自动化设备有限公司 | Differential clearance measurement device |
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