CN107063141B - Inner hole detection device for shaft detection equipment center shaft - Google Patents

Abstract

The invention provides an inner hole detection device for a middle shaft of shaft detection equipment, and belongs to the technical field of measurement. The detection device solves the technical problem that the existing shaft is not detected by corresponding automatic equipment and the like. The shaft detection equipment comprises a workbench and a measuring table arranged on the workbench, the inner hole detection device of the shaft comprises a detection air pump, an airtight measuring instrument and two groups of detection assemblies arranged side by side, each detection assembly comprises a bearing seat fixed with the measuring table and a shaft core connected in the bearing seat in a rotating mode, each shaft core is provided with a through upper through hole, the measuring table is provided with a rotating structure for driving the shaft cores in the two groups of detection assemblies to rotate synchronously, the workbench is further provided with a lifting frame, the lifting frame is fixedly provided with two pneumatic measuring heads arranged vertically upwards, the two pneumatic measuring heads are respectively located under the two shaft cores, the detection air pump is connected with the airtight measuring instrument through an air pipe, and the airtight measuring instrument is respectively connected with the two pneumatic measuring heads through the air pipe. The invention has the advantage of accurately measuring the size of the inner hole of the shaft.

Description

Inner hole detection device for shaft detection equipment center shaft

Technical Field

The invention belongs to the technical field of measurement, and relates to an inner hole detection device for a middle shaft of shaft detection equipment.

Background

In the field of high-precision equipment, the size requirement of parts in the equipment is high, so that the detection is carried out after the parts are manufactured so as to remove defective products with sizes which do not meet the requirement. The shaft is provided with two sections with different diameters, a step is formed between the two sections with different diameters, an inner hole is formed in the end of one section with a smaller diameter of the shaft, and the lengths of the two sections of the shaft and the diameter of the inner hole need to be detected before assembly. At present, no special equipment is used for automatically detecting the shaft with the structure, the detection of the shaft is mainly carried out manually by adopting a special instrument detection mode, the method is low in efficiency, and errors are easy to occur in manual detection.

Disclosure of Invention

The invention aims to provide a device for detecting an inner hole of a middle shaft of shaft detection equipment aiming at the problems in the prior art, and the device can be used for accurately measuring the size of the inner hole of the middle shaft.

The purpose of the invention can be realized by the following technical scheme:

the inner hole detection device for the shaft detection equipment comprises a workbench and a measuring table arranged on the workbench, and is characterized in that the inner hole detection device for the shaft comprises a detection air pump, an air tightness measuring instrument and two groups of detection assemblies arranged side by side, each detection assembly comprises a bearing seat fixed with the measuring table and a shaft core connected in the bearing seat in a rotating mode, the shaft cores are vertically arranged and are provided with through upper through holes, the measuring table is provided with a rotating structure for driving the shaft cores in the two groups of detection assemblies to rotate synchronously, a lifting frame is further arranged on the workbench, two pneumatic measuring heads vertically and upwards are fixed on the lifting frame, the two pneumatic measuring heads are located under the two shaft cores respectively, the detection air pump is connected with the air tightness measuring instrument through an air pipe, and the air tightness measuring instrument is connected with the two pneumatic measuring heads through air pipes respectively.

During detection, a section with a smaller shaft diameter is inserted into the upper through hole of the shaft core, the step of the shaft is abutted against the shaft core to enable the shaft to be vertically arranged, the pneumatic side head is lifted up through the lifting frame and penetrates into the inner hole of the shaft, meanwhile, the air is detected to be inflated by the air pump, and airflow enters the inner hole through the pneumatic measuring head after passing through the air tightness measuring instrument; because the pneumatic gauge head does not necessarily lie in the axis of axle when penetrating the hole of axle, consequently make dynamic change between the inner wall of axle hole and the pneumatic side head through the axis of rotation when detecting, airtight measuring apparatu can detect the pressure change from pneumatic gauge head outflow gas, and compare with the value of prestoring with data transmission on the computer, if data then the hole size of axle satisfies the requirement in the scope of the value of prestoring, if data then the hole size of axle is unqualified outside the scope of the value of prestoring, carry out twice detection through the hole of two sets of determine module counter axles, guarantee the precision of detection.

In the centraxonial hole detection device of foretell axle check out test set, the crane is including detecting lift cylinder, detection lift slide and gauge head mounting panel, it fixes on the measuring table to detect the lift cylinder, the telescopic link that detects the lift cylinder is fixed with the detection lift slide, the detection lift gib block that has vertical setting on the cylinder body of detecting the lift cylinder, it has the detection lift to lead to the groove to detect to open on the detection lift slide, it goes into to detect the lift gib block card and goes up and down to lead to the groove and can detect the relative lift to lead to the groove and slide to detect, the gauge head mounting panel is fixed on detecting the lift slide. The detection lifting cylinder is a double-rod cylinder, two telescopic rods of the detection lifting cylinder are fixed with the detection lifting slide seat, and the double-rod cylinder can enable the detection lifting slide seat to move up and down more stably; the structure that detects the lift gib block and detect the logical groove of lift makes to detect the lift slide and removes stably, guarantees that gauge head mounting panel shift position is accurate for the rigidity of pneumatic gauge head relative shaft hole guarantees the accuracy that the shaft hole detected.

In the inner hole detection device for the shaft of the shaft detection equipment, a fixed seat is fixed on a cylinder body of the detection lifting cylinder, a sensor is fixed on the fixed seat, and a probe of the sensor can be abutted against the fixed seat. The sensor can be triggered when the fixing base returns, so that the fixing base is fixed in position when returning at each time, the pneumatic measuring head is conveyed to the fixed position when the lifting cylinder is detected at each time, the position of the pneumatic measuring head relative to the shaft inner hole is fixed, and the accuracy of shaft inner hole detection is guaranteed.

In the device for detecting the inner hole of the middle shaft of the shaft detection equipment, the workbench is further provided with a mounting support, positioning cylinders which correspond to the detection assemblies one by one are fixed on the mounting support, telescopic rods of the positioning cylinders are vertically arranged downwards and are located right above the corresponding shaft cores, positioning heads are fixed on the telescopic rods of the positioning cylinders, and the lower ends of the positioning heads are provided with convex balls. The ball of head will be fixed a position through the location cylinder when detecting supports with the upper end of axle and leans on for the axle is fixed to be supported and to be leaned on the axle core, guarantees the vertical setting of axle and guarantees that the axle is fixed when detecting, guarantees the accuracy of detection data.

In the bore detection device of the shaft detection equipment, the rotating structure comprises a driving motor, a pulley shaft, an upper bearing and a lower bearing which are rotatably connected in a bearing seat, a shaft core is inserted in an inner ring of the upper bearing, the pulley shaft is inserted in an inner ring of the lower bearing, a first abdicating gap is formed between the shaft core and the pulley shaft, the pulley shaft and the shaft core are positioned in the circumferential direction and the pulley shaft can move axially relative to the shaft core, the lower end of the pulley shaft penetrates out of the bearing seat and is fixedly connected with a driven pulley, a second abdicating gap is formed between the driven pulley and the lower end surface of the bearing seat, the driving motor is fixed on a measuring table, a driving pulley is fixed on a rotating shaft of the driving motor, and the driving pulley and a plurality of driven pulleys are connected through tensioned belts. When in detection, the lower end of the shaft penetrates through the shaft core and the step surface of the shaft is abutted against the shaft core for positioning, the shaft core and the belt pulley shaft are respectively connected into the bearing seat through the upper bearing and the lower bearing in a rotating manner, the connection structures between the shaft core and the bearing seat are mutually independent, the shaft core and the belt pulley shaft are only positioned in the circumferential direction, the belt can float up and down when driving the driven pulley to rotate, the driven pulley can drive the belt pulley shaft to float up and down, the first abdicating gap enables a space which floats up and down to be formed between the belt pulley shaft and the shaft core, the second abdicating gap enables a space which floats up and down to be formed between the driven pulley and the bearing seat, and the shaft core is not connected with the belt pulley shaft in the axial direction, so that the up-and-down floating of the driven pulley and the belt pulley shaft can not cause the vibration or movement of the shaft core or the bearing seat, the shaft positioned on the shaft core can not be influenced, and the precision and the accuracy of shaft detection can be ensured; the belt drives the driven belt pulleys to rotate, synchronous detection of the shafts can be achieved, the structure is compact, and the detection efficiency is high.

In the above inner hole detecting device for the central shaft of the shaft detecting apparatus, the driven pulley has an annular guide convex ring protruding upward, and the guide convex ring penetrates into the bearing seat. When the driven pulley appears the condition of floating from top to bottom, can guarantee through the direction bulge loop that driven pulley only can float from top to bottom, consequently the pulley shaft also only can float from top to bottom, and the fluctuation of pulley shaft can not lead to the removal of axle core for the axle of pegging graft on the axle core can not receive the influence, avoids causing the interference to the measurement.

In the inner hole detection device for the middle shaft of the shaft detection equipment, the lower end face of the shaft core is provided with at least two insertion holes, the upper end face of the belt pulley shaft is provided with the raised insertion rods which are in one-to-one correspondence with the insertion holes, the abdication gap is formed between the lower end face of the shaft core and the upper end face of the belt pulley shaft, and the insertion rods can be inserted into the corresponding insertion holes and can axially move relative to the insertion holes. The shaft core and the belt pulley shaft synchronously rotate through the matching of the insertion rod and the insertion hole; the plug rod can move along the axial direction in the jack, and the axle core can not be influenced when the belt pulley shaft floats up and down, so that the axle inserted on the axle core can not be influenced, the detection of the axle can not be interfered, and the detection precision and accuracy can be guaranteed.

In the inner hole detection device for the middle shaft of the shaft detection equipment, the circumferential surface of the lower end of the shaft core is provided with a first protruding ring, the jack is arranged on the lower end surface of the first protruding ring, the circumferential surface of the upper end of the belt pulley shaft is provided with a second protruding ring, and the insertion rod is arranged on the upper end surface of the second protruding ring. The structure can ensure the connection strength and stability of the shaft core and the belt pulley shaft.

In the inner hole detection device for the middle shaft of the shaft detection equipment, the pulley shaft is provided with a lower through hole, the diameter of the lower through hole is larger than that of the upper through hole, the upper through hole of the shaft core is communicated with the lower through hole of the pulley shaft, and the middle part of the driven pulley is provided with a yielding through hole communicated with the lower through hole. The upper through hole of the shaft core is matched with the smaller section of the diameter of the shaft to be detected, and the abdicating through hole of the driven belt pulley and the lower through hole of the belt pulley shaft are used for the pneumatic measuring head to pass through.

In the bore detection device of the central shaft of the shaft detection equipment, an end cover is fixed on the upper end face of the bearing seat, a yielding hole is formed in the middle of the end cover, a reference panel is fixed on the upper end face of the shaft core, a reference convex surface is arranged on the upper plate face of the reference panel, a reference convex ring is arranged on the lower plate face of the reference panel, the reference convex ring penetrates through the yielding hole and is attached to and fixed with the upper end face of the shaft core, and the lower plate face of the reference panel is attached to the end cover. The fixed position of the reference panel and the shaft core is ensured through the structure, so that the fixed position of the reference panel is accurate, the stepped surface of the shaft can be attached to the reference convex surface when the shaft penetrates into the shaft core, the positioning position of the shaft is accurate, and the detection accuracy can be ensured.

Compared with the prior art, the inner hole detection device of the shaft detection equipment has the advantage of accurately measuring the size of the shaft inner hole.

Fig. 1 is a schematic perspective view of the present detection apparatus.

FIG. 2 is a schematic perspective view of the present test device with the housing removed.

FIG. 3 is a schematic perspective view of the inspection apparatus with the housing removed and the automatic discharging device removed.

Fig. 4 is a schematic perspective view of the automatic feeding device.

Fig. 5 is a schematic sectional structure view of the automatic feeding device.

Fig. 6 is a schematic perspective view of the station transfer device, the length detection device, the inner hole detection device and the rotating structure during assembly.

Fig. 7 is a schematic perspective view of the station transfer device.

Fig. 8 is a rear view and a partial enlarged view of the translating cylinder and translating slide block when assembled.

Fig. 9 is a schematic perspective view of the translational air cylinder assembled with the translational sliding seat.

FIG. 10 is a schematic cross-sectional view of the detection base.

In the figure, 1, a workbench; 11. a measuring table; 111. a slide rail; 112. a transverse moving pushing cylinder; 113. through the hole; 12. a feed reversing sleeve; 121. a discharge reversing sleeve; 2. mounting a bracket; 21. a lifting cylinder; 211. lifting convex strips; 212. a lifting slide seat; 213. a first connecting block part; 214. installing a flat plate; 215. a reinforcing plate; 22. a translation cylinder; 221. translating the convex strip; 222. a clip; 223. a limiting block; 224. positioning the through groove; 225. positioning the inclined plane; 226. a translational sliding seat; 227. a translation chute; 228. positioning and chamfering; 229. a second connecting block part; 229a, a bayonet; 23. mounting a plate; 24. a clamping jaw; 241. a finger cylinder; 242. a chuck; 243. a groove is embedded; 3. an upper distance sensor; 31. a lower distance sensor; 4. an air tightness measuring instrument; 41. a lifting frame; 411. detecting a lifting cylinder; 412. detecting a lifting slide seat; 413. a measuring head mounting plate; 414. a fixed seat; 42. a pneumatic measuring head; 43. positioning the air cylinder; 44. positioning the head; 5. detecting a base; 51. a shaft core; 511. an upper through hole; 512. a first convex ring; 52. a bearing seat; 521. an upper bearing seat; 522. the upper part is abutted against the convex edge; 523. a lower bearing seat; 524. the lower part is abutted against the convex edge; 53. an upper bearing; 54. a lower bearing; 55. a pulley shaft; 551. a convex ring II; 552. a plug rod; 553. yielding gaps are one; 554. a driven pulley; 555. a yielding through hole; 556. positioning the convex edge; 557. a guide convex ring; 558. a second abdicating gap; 559. a lower through hole; 56. an end cap; 57. a reference panel; 571. a reference convex surface; 572. a reference convex ring; 58. rotating the fixed bracket; 59. a drive motor; 591. a drive pulley; 592. a belt; 6. a hopper; 6a, a feed opening; 61. a side plate; 611. a tailgate; 612. a sloping plate; 613. a protection plate; 62. a push-pull plate; 621. a feeding through groove; 622. guiding chamfering; 63. a material pushing bracket; 632. a first slide rail; 64. a blanking slide block; 641. fixing the sheet metal part; 642. a fixed part; 65. a material ejection block; 66. a second slide rail; 67. a feeding pushing cylinder; 7. a magazine; 71. a discharging support; 72. a discharge guide rail; 73. a slide base; 74. a discharging lifting cylinder; 75. and (4) clamping arms.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 10, the shaft detection apparatus includes a housing, a workbench 1 fixed in the housing, and a measuring table 11 disposed on the workbench 1, three detection bases 5 disposed side by side are disposed on the measuring table 11, a shaft core 51 for positioning a shaft is rotatably connected to the detection bases 5, the shaft core 51 is vertically disposed, the shaft core 51 of the three detection bases 5 can rotate synchronously through a rotating structure, a feeding reversing sleeve 12 and a discharging reversing sleeve 121 are rotatably disposed at two ends of the three detection bases 5 on the measuring table 11, respectively, the feeding reversing sleeve 12 and the discharging reversing sleeve 121 can rotate to a horizontal state or a vertical state, a station transfer device capable of transferring a shaft from the feeding reversing sleeve 12 in the vertical state to the discharging reversing sleeve 121 in the vertical state sequentially through the three detection bases 5 is disposed on the workbench 1, a hopper 6 for storing a shaft is fixed on one side of the workbench 1 close to the feeding reversing sleeve 12, an automatic feeding device capable of automatically and sequentially inserting a shaft in the hopper 6 into the feeding reversing sleeve 12 in the horizontal state is disposed on the workbench 1, a side of the workbench 1 close to one side of the feeding reversing sleeve 12 is disposed with a magazine 7, and a length detection device capable of detecting a length of a shaft in the discharging sleeve 121 is disposed on one side of the workbench 1, and a detection base 1 capable of detecting magazine 7 that is disposed close to the discharging sleeve 121 and a horizontal state.

Specifically, as shown in fig. 1 to 3 and fig. 6 and 7, the station transfer device includes a mounting bracket 2, a lifting cylinder 21, a translation cylinder 22, a clamping jaw 24, and two parallel slide rails 111 fixed in the middle of the workbench 1, where the two slide rails 111 are arranged in parallel and at an interval, the measurement platform 11 is slidably connected to the slide rails 111, a traverse pushing cylinder 112 is fixed on the workbench 1, an expansion rod of the traverse pushing cylinder 112 is parallel to the slide rails 111, the expansion rod of the traverse pushing cylinder 112 is fixed to the measurement platform 11, the measurement platform 11 is pushed by the traverse pushing cylinder 112 to slide back and forth along the slide rails 111, the mounting bracket 2 is fixed on the workbench 1, the lifting cylinder 21 is vertically fixed downward on the mounting bracket 2, the translation cylinder 22 is fixed on the expansion rod of the lifting cylinder 21, the expansion rod of the translation cylinder 22 is perpendicular to the slide rails 111, the clamping jaw 24 corresponds to the detection base 5 one-to one, the mounting plate 23 is fixed on the expansion rod of the translation cylinder 22, and the clamping jaw 24 is fixed side by side on the mounting plate 23 and located above the detection base 5.

A lifting slide base 212 is arranged between the lifting cylinder 21 and the translation cylinder 22, a lifting convex strip 211 which is vertically arranged is arranged on the outer wall of a cylinder body of the lifting cylinder 21, a lifting sliding groove is formed in the lifting slide base 212, the lifting slide base 212 is attached to the outer wall of the cylinder body of the lifting cylinder 21, the lifting convex strip 211 is clamped into the lifting sliding groove and can slide relative to the lifting sliding groove, the translation cylinder 22 is fixed at the lower end of the lifting slide base 212, a first vertically convex connecting block part 213 is arranged on the lifting slide base 212, and a telescopic rod of the lifting cylinder 21 is fixed with the first connecting block part 213. The lifting air cylinder 21 drives the lifting slide seat 212 to move up and down, so that the translation air cylinder 22 moves up and down, and the clamping jaw 24 moves up and down.

The lower end of the lifting slide base 212 is fixed with a mounting flat plate 214, an L-shaped reinforcing plate 215 is fixed on the mounting flat plate 214, one side of the reinforcing plate 215 is attached and fixed with the lifting slide base 212, the other side of the reinforcing plate 215 is attached and fixed with the mounting flat plate 214, and the translation cylinder 22 is fixed on the lower side of the mounting flat plate 214.

Be equipped with translation sliding seat 226 between translation cylinder 22 and the mounting panel 23, the telescopic link and the translation sliding seat 226 of translation cylinder 22 are connected, it has translation spout 227 to open on the mounting panel 23, translation sand grip 221 has on the cylinder body bottom surface of translation cylinder 22, translation sand grip 221 blocks into in the translation spout 227 and can slide relative translation spout 227, the cylinder body side of translation cylinder 22 is fixed with stopper 223, stopper 223 opens towards one side of translation sliding seat 226 has location logical groove 224, the side card of translation sliding seat 226 is blocked into location logical groove 224, the below at translation sliding seat 226 is fixed to mounting panel 23. The upper and lower edges of the side surface of the translational sliding seat 226 are both provided with positioning chamfers 228, and the two side groove walls of the positioning through groove 224 are both positioning inclined surfaces 225 which can be abutted against the positioning chamfers 228. One end of the translational sliding seat 226 is provided with a second connecting block portion 229 which is vertically protruded, the second connecting block portion 229 is provided with a bayonet 229a, the bayonet 229a is U-shaped, the inner wall of the bayonet 229a is protruded to form a limiting strip matched with the shape of the bayonet 229a, the end of the telescopic rod of the translational air cylinder 22 is fixed with two clamping pieces 222, and the limiting strip is clamped between the two clamping pieces 222.

The clamping jaw 24 comprises a finger cylinder 241 and two clamping heads 242, the two clamping heads 242 are respectively fixed on the cylinder arm of the finger cylinder 241, and the opposite side surfaces of the two clamping heads 242 are provided with embedded grooves 243.

As shown in fig. 1 to 3 and 6, the length detection device includes an upper distance sensor 3 and a lower distance sensor 31, the lower distance sensor 31 is fixed on the measuring table 11, and a shaft core 51 corresponding to the detection base 5 is located directly above the lower distance sensor 31, and the upper distance sensor 3 is fixed on the table 1 and can move directly below the upper distance sensor 3 corresponding to the shaft core 51 of the detection base 5. The upper distance sensor 3 and the lower distance sensor 31 are respectively contacted with the upper end surface and the lower end surface of the shaft, and the positions among the upper distance sensor 3, the lower distance sensor 31 and the shaft core 51 are determined, so that the length of a section with a larger shaft diameter can be detected by the upper distance sensor 3, and the length of a section with a smaller shaft diameter can be detected by the lower distance sensor 31; during detection, the rotating structure drives the shaft core 51 to rotate, so that the shaft can rotate along with the rotation, the upper distance sensor 3 can be respectively contacted with different positions of the upper end surface of the shaft, the lower distance sensor 31 can be respectively contacted with different positions of the lower end surface of the shaft, and the lengths of a section with a larger diameter and a section with a smaller diameter of the shaft can be accurately obtained through measurement of a plurality of positions; preferably, the upper distance sensor 3 and the lower distance sensor 31 in the present application are sensors of type GT2-a50, which are existing products.

As shown in fig. 1 to 3 and fig. 6, the workbench 1 is further provided with an inner hole detection device corresponding to the other two detection bases 5 and capable of detecting and positioning the size of the inner hole of the upper shaft on the two detection bases 5, the inner hole detection device comprises a detection air pump and an air-tight measuring instrument 4, the workbench 1 is provided with a lifting frame 41, the lifting frame 41 is fixed with two pneumatic measuring heads 42 vertically arranged upwards and the lifting frame 41 can drive the two pneumatic measuring heads 42 to move up and down, the two pneumatic measuring heads 42 can be respectively positioned under the two shaft cores 51 corresponding to the two detection bases 5, the detection air pump is connected with the air-tight measuring instrument 4 through an air pipe, and the air-tight measuring instrument 4 is respectively connected with the two pneumatic measuring heads 42 through the air pipe. The pneumatic side head is lifted by the lifting frame 41 and penetrates into the inner hole of the shaft, meanwhile, the air pump is detected to be inflated, and airflow enters the inner hole through the pneumatic measuring head 42 after passing through the air tightness measuring instrument 4; because the pneumatic gauge head 42 does not necessarily lie in the axis of axle when penetrating the hole of axle, consequently through the axis of rotation when detecting between the inner wall that makes the axle hole and the pneumatic side head dynamic change, airtight measuring apparatu 4 can detect the pressure change of following the pneumatic gauge head 42 outflow gas to compare with the value of prestoring on sending data to the computer, if the data is in the scope of prestoring the value then the hole size of axle satisfies the requirement, if the data is outside the scope of prestoring the value then the hole size of axle is unqualified, carry out twice detection through the hole of two sets of detection bases 5 axles, guarantee the precision of detecting.

As shown in fig. 1, 2 and 6, the lifting frame 41 includes a detection lifting cylinder 411, a detection lifting slide 412 and a measuring head mounting plate 413, the detection lifting cylinder 411 is fixed on the measuring table 11, a telescopic rod of the detection lifting cylinder 411 is fixed with the detection lifting slide 412, a detection lifting guide bar with a vertical arrangement is arranged on a cylinder body of the detection lifting cylinder 411, a detection lifting through groove is formed on the detection lifting slide 412, the detection lifting guide bar is clamped into the detection lifting through groove and can relatively detect the sliding of the lifting through groove, and the measuring head mounting plate 413 is fixed on the detection lifting slide 412. Detect lift cylinder 411 and be two pole cylinders, detect two telescopic links of lift cylinder 411 and detect lift slide 412 fixed, two pole cylinders can make to detect lift slide 412 and reciprocate more stably. Detect and be fixed with fixing base 414 on the cylinder body of lift cylinder 411, be fixed with the sensor on the fixing base 414, the probe of sensor can support with fixing base 414 and lean on. The sensor can be triggered when the fixed base 414 is returned.

As shown in fig. 1, 2 and 6, the mounting bracket 2 is fixed with positioning cylinders 43 corresponding to the two detection bases 5 for detecting the shaft inner holes one by one, the telescopic rods of the positioning cylinders 43 are vertically arranged downwards and are located right above the corresponding shaft cores 51, the telescopic rods of the positioning cylinders 43 are fixed with positioning heads 44, and the lower ends of the positioning heads 44 are provided with convex balls. When in detection, the ball of the positioning head 44 is abutted against the upper end of the shaft through the positioning air cylinder 43, so that the shaft is fixedly abutted against the shaft core 51.

As shown in fig. 1 to 3, 6 and 10, the rotation structure includes a driving motor 59 and a belt 592, the detection base 5 includes a bearing seat 52 fixed to the measurement table 11, an upper bearing 53 and a lower bearing 54 rotatably connected in the bearing seat 52, a shaft core 51 is inserted and positioned in an inner ring of the upper bearing 53, a pulley shaft 55 is inserted and positioned in an inner ring of the lower bearing 54, an offset gap 553 is provided between the shaft core 51 and the pulley shaft 55, the pulley shaft 55 and the shaft core 51 are positioned in a circumferential direction and the pulley shaft 55 can move in an axial direction relative to the shaft core 51, a lower end of the pulley shaft 55 penetrates through the bearing seat 52 and is fixedly connected with a driven pulley 554, the driven pulley 554 has an annular guide convex ring 557 protruding upward, the guide convex ring 557 penetrates through the bearing seat 52, the driven pulley has an offset gap 558 with a lower end surface of the bearing seat 554, the driving motor 59 is fixed on the measurement table 11, a driving pulley 591 is fixed on a rotation shaft of the driving motor 59, and the driving pulley 591 is connected with the three driven pulleys 554 through the belt 592 in tension. The shaft core 51 and the pulley shaft 55 are rotatably connected in the bearing seat 52 through an upper bearing 53 and a lower bearing 54 respectively, the connecting structures between the shaft core 51 and the pulley shaft 55 and the bearing seat 52 are mutually independent, the shaft core 51 and the pulley shaft 55 are only positioned in the circumferential direction, the belt 592 can float up and down when driving the driven pulley 554 to rotate, the driven pulley 554 can drive the pulley shaft 55 to float up and down, a space which floats up and down is formed between the pulley shaft 55 and the shaft core 51 due to the clearance one 553, a space which floats up and down is formed between the driven pulley 554 and the bearing seat 52 due to the clearance two 558, and the shaft core 51 is not connected with the pulley shaft 55 in the axial direction, so that the up and down floating of the driven pulley 592 and the pulley shaft 55 cannot cause the vibration or the movement of the shaft core 51 or the bearing seat 52, and a shaft to be detected positioned on the shaft core 51 cannot be influenced, and the precision and the accuracy of shaft detection can be ensured; the belt 592 drives the driven pulleys 554 to rotate, synchronous detection of the detection bases 5 can be achieved, the structure is compact, and detection efficiency is high.

As shown in fig. 10, at least two insertion holes are formed in the lower end surface of the shaft core 51, the upper end surface of the pulley shaft 55 is provided with protruding insertion rods 552 corresponding to the insertion holes one by one, a clearance 553 is formed between the lower end surface of the shaft core 51 and the upper end surface of the pulley shaft 55, the insertion rods 552 can be inserted into the corresponding insertion holes, and the insertion rods 552 can move axially relative to the insertion holes. The shaft core 51 and the pulley shaft 55 rotate synchronously through the matching of the plug rod 552 and the plug hole. The lower end peripheral surface of the shaft core 51 is provided with a convex first convex ring 512, the insertion hole is arranged on the lower end surface of the convex first convex ring 512, the upper end peripheral surface of the belt pulley shaft 55 is provided with a convex second convex ring 551, and the insertion rod 552 is arranged on the upper end surface of the convex second convex ring 551.

The bearing seat 52 comprises an upper bearing seat 521 and a lower bearing seat 523, the upper bearing seat 521 is fixed with the measuring table 11 through bolts, the lower bearing seat 523 is fixed on the lower bottom surface of the lower bearing seat 523, an upper abutting convex edge 522 is arranged at the position, close to the lower end, of an inner hole of the upper bearing seat 521, the outer ring of the upper bearing 53 abuts against the upper abutting convex edge 522, a lower abutting convex edge 524 is arranged at the position, close to the lower end, of the inner hole of the lower bearing seat 523, and an outer ring of the lower bearing 54 abuts against the lower abutting convex edge 524.

The upper through hole 511 is formed in the shaft core 51, the lower through hole 559 is formed in the pulley shaft 55, the diameter of the lower through hole 559 is larger than that of the upper through hole 511, the upper through hole 511 of the shaft core 51 is communicated with the lower through hole 559 of the pulley shaft 55, and the abdicating through hole 555 communicated with the lower through hole 559 is formed in the middle of the driven pulley 554.

The lower end of the abdicating through hole 555 of the driven pulley 554 is provided with a positioning convex edge 556, the pulley shaft 55 is inserted into the abdicating through hole 555 and is abutted against the positioning convex edge 556, and the pulley shaft 55 is fixed with the positioning convex edge 556 through a bolt.

An end cover 56 is fixed on the upper end face of the bearing seat 52, an abdicating hole is formed in the middle of the end cover 56, a reference panel 57 is fixed on the upper end face of the shaft core 51, a reference convex surface 571 is formed on the upper plate surface of the reference panel 57, a reference convex ring 572 is formed on the lower plate surface of the reference panel 57, the reference convex ring 572 passes through the abdicating hole to be attached and fixed to the upper end face of the shaft core 51, and the lower plate surface of the reference panel 57 is attached to the end cover 56. The inspection base 5 has three, the driven pulleys 554 have three and are arranged side by side, and the belt 592 abuts against the outside of the driven pulleys 554 located on both sides away from the measuring table 11 and abuts against the inside of the driven pulleys 554 located in the middle near the measuring table 11.

The rotation fixing bracket 58 is fixed on the measuring table 11, the driving motor 59 is fixed on the rotation fixing bracket 58, a strip-shaped through hole 113 is formed on the measuring table 11, and the belt 592 passes through the through hole 113.

As shown in fig. 1 to 5, the automatic feeding device includes a push-pull plate 62, a hopper 6 is provided with a downward elongated discharge opening 6a, the push-pull plate 62 is located between the workbench 1 and the hopper 6, and the push-pull plate 62 can move back and forth along the front-rear direction, a feeding through groove 621 capable of accommodating only one shaft is formed in the middle of the push-pull plate 62, an upper notch of the feeding through groove 621 can be aligned with the discharge opening 6a, a pushing support 63 is further fixed on the workbench 1, the pushing support 63 is located at the rear portion of the hopper 6, a pushing block 65 capable of sliding and sliding from one end of the feeding through groove 621 to the other end is arranged on the pushing support 63, and the other end of the feeding through groove 621 can be aligned with the feeding reversing sleeve 12 in a horizontal state. A shaft to be detected is placed in the hopper 6, the push-pull plate 62 is pushed to move forwards until the feeding through groove 621 of the push-pull plate 62 is aligned with the discharging opening 6a, at the moment, the shaft in the hopper 6 at the discharging opening 6a falls into the feeding through groove 621, the push-pull plate 62 is retracted, the push-pull plate 62 moves backwards to draw out the shaft in the feeding through groove 621, at the moment, the upper plate surface of the push-pull plate 62 is aligned with the discharging opening 6a, the shaft is prevented from falling out of the hopper 6, when the push-pull plate 62 moves to enable the ejector block 65 to be aligned with the feeding through groove 621, the push-pull plate stops moving, at the moment, the feeding through groove 621 is aligned with the feeding reversing sleeve 12, the ejector block 65 slides and pushes the shaft in the feeding through groove 621 to move towards the feeding reversing sleeve 12 until the shaft is inserted into the feeding reversing sleeve 12, and the automatic feeding of the shaft is realized in a reciprocating manner; the reciprocating movement of the push-pull plate 62 with the feeding through groove 621 can ensure that only one shaft is drawn out each time, and the shaft is pushed to the feeding reversing sleeve 12 through the ejector block 65, so that the structure is simple, and the continuous feeding of the shaft can be ensured.

The material pushing support 63 comprises a portal frame and a first sliding rail 632 fixed on the portal frame, the first sliding rail 632 is parallel to the feeding through groove 621, the first sliding rail 632 is connected with a blanking sliding block 64 in a sliding mode, a driving source capable of pushing the blanking sliding block 64 to slide back and forth is arranged on the portal frame, and the material pushing block 65 is fixed with the blanking sliding block 64. The driving source can be a motor or an air cylinder, the first sliding rail 632 slides back and forth to drive the ejector block 65 to move back and forth, when the push-pull plate 62 moves back, the feeding through groove 621 is internally provided with a shaft, the ejector block 65 is located at one end of the feeding through groove 621, the ejector block 65 moves towards the other end of the feeding through groove 621, in the process, the ejector block 65 can abut against one end of the shaft and push the shaft to move, and finally the shaft is pushed into the feeding reversing sleeve 12.

The blanking sliding block 64 is fixed with a fixed sheet metal part 641, the lower end of the fixed sheet metal part 641 is provided with a fixed part 642, the ejector block 65 is cylindrical, one end of the ejector block 65 is provided with a positioning step, the fixed part 642 is embedded into the positioning step of the ejector block 65 and fixed with the ejector block 65 through a bolt, and the other end of the ejector block 65 is an ejector end face. The ejector block 65 is made of brass or plastic. The hardness of brass and plastic is low, so that damage to the shaft during material ejection is avoided; brass is not easy to wear and has long service life, which is the preferred scheme.

The hopper 6 comprises two side plates 61 arranged in parallel, a rear baffle 611 and an inclined plate 612 fixed between the two side plates 61, the lower ends of the two side plates 61 are fixed with the workbench 1, the rear baffle 611 is arranged vertically, a gap is formed between the lower end of the rear baffle 611 and the workbench 1, the inclined plate 612 inclines in the up-down direction, a gap is formed between the lower end of the inclined plate 612 and the workbench 1, and the lower end of the inclined plate 612 and the lower end of the rear baffle 611 form the feed opening 6a. And the inner side surfaces of the two side plates 61 are fixed with a protection plate 613, and the protection plate 613 is made of plastics.

The width of the feeding opening 6a is at least twice as large as that of the feeding through groove 621. The dead condition of card between feed opening 6a between axle and the axle has been avoided, has guaranteed that a axle must get into the logical inslot of material loading 621 when feed opening 6a and the logical groove 621 of material loading align. The distance between the upper end surface of the push-pull plate 62 and the baffle plate and the inclined plate 612 is smaller than the width of the feeding through groove 621. The shaft can be prevented from entering the space between the push-pull plate 62 and the baffle and sloping plate 612 when the push-pull plate 62 moves back and forth, ensuring that only one shaft can be pulled out of the push-pull plate 62 each time. The upper edges of the push-pull plate 62 on both sides of the loading through slot 621 are provided with guide chamfers 622. Two sliding rails II 66 are fixed on the workbench 1 along the front-back direction, the push-pull plate 62 is connected to the sliding rails II 66 in a sliding mode, and a feeding pushing cylinder 67 capable of pushing the push-pull plate 62 to move back and forth is fixed on the workbench 1.

As shown in fig. 2, the automatic discharging device includes a clamping arm 75 fixed on the workbench 1, a discharging support 71 is fixed on the workbench 1, a discharging guide rail 72 horizontally arranged is fixed on the discharging support 71, the magazine 7 is located under the discharging guide rail 72, and two ends of the discharging guide rail 72 are located outside the magazine 7, a sliding seat 73 is slidably connected on the discharging guide rail 72, a discharging lifting cylinder 74 is vertically fixed on the sliding seat 73, a telescopic rod of the discharging lifting cylinder 74 is arranged downward, and the clamping arm 75 is fixed on the telescopic rod of the discharging lifting cylinder 74. Shaft detection equipment has ejection of compact switching-over sleeve 121, and the axle that ejection of compact switching-over sleeve 121 will detect the completion rotates to horizontal position, presss from both sides the axle through arm lock 75 this moment, and ejection of compact switching-over sleeve 121 retreats and makes the axle withdraw from in ejection of compact switching-over sleeve 121, and rethread slide 73 will accompany the arm lock 75 of axle and move to magazine 7 top to make arm lock 75 descend through ejection of compact lift cylinder 74 and place the axle in magazine 7, how to reciprocate to realize automatic discharging.

During detection, a plurality of shafts to be detected are placed in the hopper 6, the shafts are pulled out from the hopper 6 one by one through the push-pull plate 62, the pulled shafts are pushed to the feeding reversing sleeve 12 through the ejector block 65, at the moment, the feeding reversing sleeve 12 is aligned with the feeding through groove 621 of the push-pull plate 62, the shafts are inserted into the feeding reversing sleeve 12, the feeding reversing sleeve 12 is rotated to a vertical position through the motor, the shafts are vertically arranged, the measuring table 11 transversely moves towards one side of the hopper 7 through the transverse moving pushing cylinder 112, the shafts vertically arranged on the feeding reversing sleeve 12 move to be right below the clamping jaws 24 close to the hopper 6, the clamping jaws 24 clamp the shafts and pull the shafts out of the feeding reversing sleeve 12, the measuring table 11 is moved back to an initial position, at the moment, the shafts on the clamping jaws 24 close to the hopper 6 are positioned right above the detection base 5 close to the hopper 6, the clamping jaws 24 are axially inserted into the detection base 5, and at the same time, the lifting frame 41 extends the pneumatic measuring head 42 into the inner hole of the shaft for detection, the clamping jaw 24 extracts the shaft from the detection base 5 after the detection is finished, the shaft is inserted into the second detection base 5 for pneumatic detection through the back and forth movement of the measuring table 11, the shaft is inserted into the third detection base 5 through the matching of the clamping jaw 24 and the measuring table 11 after the size of the inner hole is detected twice, the length of the shaft is detected through the upper distance sensor 3 and the lower distance sensor 31, the shaft rotates along with the detection base 5 in the detection process, the shaft is inserted into the discharging reversing sleeve 121 through the matching of the clamping jaw 24 and the measuring table 11 after the detection is finished, the discharging reversing sleeve 121 rotates to enable the shaft to be horizontal, then the shaft is clamped through the clamping arm 75, the shaft is extracted from the discharging reversing sleeve 121 through the retraction of the measuring table 11, the clamping arm 75 puts the shaft into the material box 7 for recovery, completing the detection of the shaft; the detection process is carried out in a flow line mode, and therefore shafts are arranged in the three detection bases 5 when detection is carried out at each time, and therefore detection efficiency is high.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (7)

1. The inner hole detection device of the shaft detection equipment is characterized by comprising a detection air pump, an air tightness measuring instrument and two groups of detection assemblies arranged side by side, wherein each detection assembly comprises a bearing seat fixed with the corresponding measuring platform and a shaft core rotatably connected in the corresponding bearing seat, the shaft core is vertically arranged and provided with a through upper through hole, the measuring platform is provided with a rotating structure for driving the shaft cores of the two groups of detection assemblies to synchronously rotate, the working platform is further provided with a lifting frame, two pneumatic measuring heads vertically and upwards arranged are fixed on the lifting frame, the two pneumatic measuring heads are respectively positioned right below the two shaft cores, the detection air pump is connected with the air tightness measuring instrument through an air pipe, and the air tightness measuring instrument is respectively connected with the two pneumatic measuring heads through air pipes; the rotating structure comprises a driving motor, a pulley shaft, an upper bearing and a lower bearing which are rotatably connected in a bearing seat, wherein a shaft core is inserted in an inner ring of the upper bearing, the pulley shaft is inserted in an inner ring of the lower bearing, a first abdicating gap is formed between the shaft core and the pulley shaft, the pulley shaft and the shaft core are positioned in the circumferential direction, the pulley shaft can move axially relative to the shaft core, the lower end of the pulley shaft penetrates through the bearing seat and is fixedly connected with a driven pulley, a second abdicating gap is formed between the driven pulley and the lower end surface of the bearing seat, the driving motor is fixed on a measuring table, a driving pulley is fixed on a rotating shaft of the driving motor, and the driving pulley is connected with a plurality of driven pulleys through tensioned belts; the lower end face of the shaft core is provided with at least two insertion holes, the upper end face of the belt pulley shaft is provided with protruding insertion rods which correspond to the insertion holes one by one, the yielding gap I is formed between the lower end face of the shaft core and the upper end face of the belt pulley shaft, the insertion rods can be inserted into the corresponding insertion holes, and the insertion rods can axially move relative to the insertion holes; the belt pulley shaft is provided with a lower through hole, the diameter of the lower through hole is larger than that of the upper through hole, the upper through hole of the shaft core is communicated with the lower through hole of the belt pulley shaft, and the middle part of the driven pulley is provided with a yielding through hole communicated with the lower through hole.

2. The inner hole detection device for the shaft in the shaft detection device according to claim 1, wherein the lifting frame comprises a detection lifting cylinder, a detection lifting slide and a measuring head mounting plate, the detection lifting cylinder is fixed on the measuring table, a telescopic rod of the detection lifting cylinder is fixed with the detection lifting slide, a detection lifting guide bar which is vertically arranged is arranged on a cylinder body of the detection lifting cylinder, a detection lifting through groove is formed in the detection lifting slide, the detection lifting guide bar is clamped into the detection lifting through groove and can slide relative to the detection lifting through groove, and the measuring head mounting plate is fixed on the detection lifting slide.

3. The inner hole detection device for the shaft in the shaft detection equipment according to claim 2, wherein a fixed seat is fixed on the cylinder body of the detection lifting cylinder, a sensor is fixed on the fixed seat, and a probe of the sensor can abut against the fixed seat.

4. The inner hole detection device for the central shaft of the shaft detection equipment according to claim 1, wherein the workbench is further provided with a mounting bracket, positioning cylinders corresponding to the detection assemblies one by one are fixed on the mounting bracket, telescopic rods of the positioning cylinders are vertically arranged downwards and are positioned right above the corresponding shaft cores, positioning heads are fixed on the telescopic rods of the positioning cylinders, and the lower ends of the positioning heads are provided with protruding balls.

5. The apparatus of claim 1, wherein the driven pulley has an annular guide collar protruding upward and penetrating into the bearing seat.

6. The inner hole detecting device for the middle shaft of the shaft detecting apparatus as claimed in claim 1, wherein the lower end peripheral surface of the shaft core is provided with a first protruding ring, the insertion hole is formed in the lower end surface of the first protruding ring, the upper end peripheral surface of the pulley shaft is provided with a second protruding ring, and the insertion rod is arranged on the upper end surface of the second protruding ring.

7. The inner hole detection device for the shaft of the shaft detection equipment according to claim 1, wherein an end cover is fixed on the upper end face of the bearing seat, an abdicating hole is formed in the middle of the end cover, a reference panel is fixed on the upper end face of the shaft core, a reference convex surface is arranged on the upper plate surface of the reference panel, a reference convex ring is arranged on the lower plate surface of the reference panel, the reference convex ring passes through the abdicating hole and is attached and fixed to the upper end face of the shaft core, and the lower plate surface of the reference panel is attached to the end cover.

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