A measuring device for an ultra-high precision RV reducer planet carrier

Abstract

The application relates to a measuring device for an ultra-high-precision RV reducer planet carrier, which comprises a base, a product placing platform, a rotary table mechanism, a positioning device, a sliding table mounting plate, a first sliding table, a first driving mechanism, a first linear grating ruler, a second sliding table, a second driving mechanism, a second linear grating ruler, a pneumatic sliding table, a circlip groove height detection sensor, a main bearing mounting height detection sensor, an outer circle detection sensor, a pneumatic inner diameter detection mechanism and a controller, the second sliding table is mounted on the horizontally-moving first sliding table, the main bearing mounting height detection sensor, the outer circle detection sensor, the pneumatic inner diameter detection mechanism and the pneumatic sliding table are mounted on the vertically-moving second sliding table, and the circlip groove height detection sensor is mounted on the pneumatic sliding table. Compared with the prior art, the application constructs a device for rapidly detecting various parameters of an RV reducer planet carrier, so as to detect various data of the produced planet carrier, thereby guaranteeing the quality and precision of the planet carrier.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of RV reducer planet carrier measurement, and particularly relates to a measurement device for an ultra-high-precision RV reducer planet carrier. BACKGROUND

[0002] The RV reducer is a kind of important reducer in precision reducers. The electric motor, internal combustion engine and other high-speed rotating power devices are connected with the input gear and output gear of the reducer to realize the purpose of speed reduction. In terms of structure, the RV reducer is developed on the basis of the traditional planetary gear and cycloidal pin wheel reducers, and is composed of the front stage of the planetary gear reducer and the rear stage of the cycloidal pin wheel reducer. The RV reducer has the characteristics of small size, long service life, strong environmental adaptability and large torsional stiffness, and is widely used in the fields of machine tools, industrial robots and medical detection equipment. The output component of the RV reducer is a planet carrier supported by two bearings. The planet carrier outputs through a large disc on the left side, and the large disc is connected with the transmission mechanism by bolts. Therefore, the planet carrier of the RV reducer is an important component that affects the performance and service life of the RV reducer. Therefore, it is very important to measure the parameters of the RV reducer planet carrier. However, there is no special measurement device for ultra-high-precision RV reducer planet carriers. SUMMARY

[0003] The present application is to overcome the defects of the prior art and provide a measurement device for an ultra-high-precision RV reducer planet carrier.

[0004] The object of the present application can be achieved by the following technical solutions:

[0005] A measurement device for an ultra-high-precision RV reducer planet carrier, comprising:

[0006] a base;

[0007] a product placement platform for placing a measured part;

[0008] a turntable mechanism installed on the base, the product placement platform is connected with the turntable mechanism, and the turntable mechanism is used to drive the product placement platform to rotate relative to the base;

[0009] a positioning device matched with the measured part, used to position and fix the measured part on the product placement platform;

[0010] a slide table mounting plate installed on the base;

[0011] a first slide table installed on the slide table mounting plate;

[0012] a first driving mechanism for driving the first sliding table to move left and right along the sliding table mounting plate;

[0013] a first linear grating ruler mounted on the sliding table mounting plate for detecting displacement of the first sliding table;

[0014] a second sliding table mounted on the first sliding table;

[0015] a second driving mechanism for driving the second sliding table to move up and down along the first sliding table;

[0016] a second linear grating ruler mounted on the sliding table mounting plate for detecting displacement of the second sliding table;

[0017] a pneumatic sliding table mounted on the second sliding table;

[0018] a spring retainer groove height detection sensor mounted on the pneumatic sliding table for measuring the spring retainer groove height of a workpiece;

[0019] a main bearing mounting height detection sensor mounted on the second sliding table for measuring the main bearing mounting height of a workpiece;

[0020] an outer circle detection sensor mounted on the second sliding table for measuring the outer diameter, roundness and cylindricity of a main bearing of a workpiece;

[0021] a pneumatic inner diameter detection mechanism mounted on the second sliding table for measuring the bore diameter of a taper bearing of a workpiece;

[0022] a controller connected to the rotary table mechanism, the first driving mechanism, the first linear grating ruler, the second driving mechanism, the second linear grating ruler, the pneumatic sliding table, the spring retainer groove height detection mechanism, the main bearing mounting height detection sensor, the outer circle detection mechanism and the pneumatic inner diameter detection mechanism.

[0023] Further, the rotary table mechanism comprises an electric air floating rotary table and an angular displacement encoder for measuring the rotation angle of the electric air floating rotary table.

[0024] Further, the positioning device comprises a pneumatic centering clamp and a positioning pin, the pneumatic centering clamp is arranged on the rotary table mechanism, and the positioning pin is arranged on the product placing platform.

[0025] Further, the sliding table mounting plate is provided with a first guide rail, the first sliding table is provided with a first sliding block matched with the first guide rail, the first sliding table is mounted on the sliding table mounting plate through the first sliding block and the first guide rail, and the sliding table mounting plate is provided with a first pneumatic guide rail clamp matched with the first guide rail.

[0026] Further, the first sliding table is provided with a second guide rail, the second sliding table is provided with a second sliding block matched with the second guide rail, the second sliding table is installed on the first sliding table through the second sliding block and the second guide rail, and the first sliding table is provided with a second pneumatic guide rail clamp matched with the second guide rail.

[0027] Further, the first driving mechanism is a linear motor, the second driving mechanism comprises a servo motor, a planetary reducer and a screw nut structure, the output shaft of the servo motor is connected with the screw nut structure through the planetary reducer, the screw nut structure is connected with the second sliding table, and the rotation of the output shaft of the servo motor drives the second sliding table to move up and down relative to the first sliding table through the screw nut structure.

[0028] Further, the snap spring groove height detection sensor comprises a first integrated sensor, the pneumatic sliding table is used for driving the first integrated sensor to extend or retract, the first integrated sensor is provided with a ruby probe, the main bearing installation height detection sensor comprises a second integrated sensor, the second integrated sensor is provided with a ruby probe, and the outer circle detection sensor comprises an inductive sensor and a roller probe.

[0029] Further, the second sliding table is provided with a mounting plate, the main bearing installation height detection sensor and the outer circle detection sensor are installed on the mounting plate, and four groups of fine adjustment units are arranged between the second sliding table and the mounting plate.

[0030] Further, the base is provided with a support, the sliding table mounting plate is installed on the support, and six groups of height adjustment units are arranged between the sliding table mounting plate and the support.

[0031] Further, the bottom end of the base is provided with a damping assembly.

[0032] Compared with the prior art, the present application has the following beneficial effects:

[0033] (1) A device for quickly detecting various parameters of the RV reducer planetary carrier is constructed, which comprises a snap spring groove height detection mechanism, a main bearing installation height detection sensor, an outer circle detection mechanism and a pneumatic inner diameter detection mechanism, various data of the produced crankshaft can be detected, so as to guarantee the quality and precision of the planetary carrier.

[0034] (2) The rotary table mechanism comprises an electric air floating rotary table and an angular displacement encoder, the angular displacement encoder is used for measuring the rotation angle of the electric air floating rotary table, so as to serve as feedback adjustment, realize accurate control of the electric air floating rotary table, and can achieve 0.2 microns of rotation precision control, so as to meet the measurement needs.

[0035] (3) The positioning device includes a pneumatic centering jaw and a positioning pin. The pneumatic centering jaw is set on the turntable mechanism, and the positioning pin is set on the product placement platform. Each product on the product placement platform is phase-fixed by the corresponding positioning pin. The pneumatic centering jaw includes three jaws, which can ensure a positioning accuracy of 0.02 mm. The positioning device can ensure that the product can be accurately fixed on the product placement platform, thereby ensuring the accuracy of subsequent measurements. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the pneumatic inner diameter detection mechanism;

[0038] Figure 3 A schematic diagram of the slide mounting plate and the first and second slides;

[0039] Figure label:

[0040] 100. Slide mounting plate; 200. First slide; 300. Second slide;

[0041] 1. Shock absorption assembly; 2. Base; 3. Turntable mechanism; 4. Pneumatic centering jaw; 5. Test piece; 6. Ruby probe for main bearing mounting height detection sensor; 7. Outer circle detection sensor; 8. Main bearing mounting height detection sensor; 9. Fine adjustment unit; 10. Snap ring groove height detection sensor; 11. Height adjustment unit; 12. First guide rail + first slider + first pneumatic guide rail clamp; 13. Pneumatic slide table; 14. Second guide rail + second slider + second pneumatic guide rail clamp; 15. First linear grating ruler; 16. Planetary reducer; 17. Servo motor; 18. Second linear grating ruler; 19. Screw and nut structure; 20. Linear motor.

[0042] 21. Rotary cylinder; 22. Rotary encoder; 23. Precision spindle; 24. Floating plate + fixed plate + sliding plate; 25. Pneumatic inner diameter probe.

[0043] 26. Laser rangefinder sensor; 27. Barcode scanner; 28. Stand.

[0044] 29. Floating plate; 30. First connecting sleeve; 31. First linear guide shaft; 32. Second linear guide shaft; 33. First inductive sensor; 34. Third linear guide shaft; 35. Bushing assembly; 36. Coupling; 37. Air chamber; 38. Second inductive sensor; 39. Second connecting sleeve; 40. Sliding plate; 41. Fixed plate.

[0045] 12-1, first guide rail, 12-2, first sliding table, 12-3, first pneumatic guide rail clamp, 14-1, second guide rail, 14-2, second sliding block, 14-3, second pneumatic guide rail clamp, 42, drag chain, 43, second safety travel switch, 44, first safety travel switch. DETAILED DESCRIPTION

[0046] The application will be described in detail below with reference to the drawings and specific embodiments. The embodiments are implemented on the premise of the technical scheme of the application, and detailed implementation modes and specific operation processes are given, but the protection scope of the application is not limited to the following embodiments.

[0047] In the drawings, components of the same structure are denoted by the same reference numerals, and components similar in structure or function are denoted by similar reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the application does not limit the size and thickness of each component. In order to make the drawing clearer and show the cooperation relationship between the components, the components are appropriately scaled in some places in the drawings, and the distance between the components is increased or decreased.

[0048] In the description of the embodiments of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0050] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] Example 1

[0052] A kind of measuring equipment for ultra-high precision RV reducer planet carrier, comprising: base 2;Product placement platform, product placement platform is used to place the measured piece 5 (also called product, planet carrier);Rotary table mechanism 3, rotary table mechanism 3 is installed on base 2, product placement platform is connected with rotary table mechanism 3, rotary table mechanism 3 is used to drive product placement platform relative to base 2 rotation;Positioning device, positioning device is matched with the measured piece 5, for positioning and fixing the measured piece 5 on product placement platform;Slip platform mounting plate 100, installed on base 2;First slip platform 200, installed on slip platform mounting plate 100;First drive mechanism, for driving first slip platform 200 moves left and right along slip platform mounting plate 100;First linear grating ruler 15, installed on slip platform mounting plate 100, for detecting the displacement of first slip platform 200;Second slip platform 300, installed on first slip platform 200;Second drive mechanism, for driving second slip platform 300 moves up and down along first slip platform 200;Second linear grating ruler 18, installed on slip platform mounting plate 100, for detecting the displacement of second slip platform 300;Pneumatic slip platform 13, installed on second slip platform 300;Spring clip groove height detection sensor 10, installed on pneumatic slip platform 13, for measuring the measured piece 5 spring clip groove height;Main bearing installation height detection sensor 8, installed on second slip platform 300, for measuring the measured piece 5 main bearing installation height;Circumference detection sensor 7, installed on second slip platform 300, for measuring the measured piece 5 main bearing outer diameter, roundness and cylindricity;Pneumatic internal diameter detection mechanism, installed on second slip platform 300, for measuring the measured piece 5 taper bearing hole diameter;Controller, connected with rotary table mechanism 3, first drive mechanism, first linear grating ruler 15, second drive mechanism, second linear grating ruler 18, pneumatic slip platform 13, spring clip groove height detection mechanism, main bearing installation height detection sensor 8, circumference detection mechanism and pneumatic internal diameter detection mechanism.

[0053] In the measurement of ultra-high precision RV reducer planet carrier, rotary table mechanism 3 drives product placement platform and the measured piece 5 on it to rotate, so as to measure the roundness, cylindricity and other parameters of the measured piece 5 (high-precision RV reducer planet carrier), therefore, high-precision rotary table is needed.In the present application, rotary table mechanism 3 includes an electric air floating rotary table and an angular displacement encoder, the angular displacement encoder is used to measure the rotation angle of the electric air floating rotary table, so as to serve as feedback adjustment, realize accurate control of the electric air floating rotary table, and achieve 0.2 micrometer rotation precision control, meet the measurement needs.

[0054] The electric air float turntable with the required precision can be selected from the market, or the electric air float turntable can be self-developed. The basic principle of the electric air float turntable is as follows: Specifically, the electric air float turntable comprises a fixed seat, a torque motor, a rotating shaft, a workbench, an angular displacement encoder and an air float bearing. The fixed seat is integrated with the base 2. The workbench is connected with the product placement platform. The fixed seat is provided with a groove. The torque motor and the rotating shaft are installed in the groove. The output end of the torque motor is connected with the rotating shaft. The angular displacement encoder is installed on the rotating shaft. The workbench is connected with the top end of the rotating shaft. The air float bearing is located between the outer circumferential surface of the rotating shaft and the side wall of the groove. There is a first gap between the air float bearing and the outer circumferential surface of the rotating shaft. There is a second gap between the upper end surface of the air float bearing and the lower end surface of the workbench. The air float bearing comprises a mounting seat, at least one first gas throttle valve and at least one second gas throttle valve. The mounting seat is provided with a gas cavity 37. The side wall of the fixed seat is provided with an air inlet. The gas cavity 37 is communicated with the air inlet. The gas supply device outside the air inlet supplies gas to the gas cavity 37 to maintain the air pressure in the gas cavity 37. The first gas throttle valve is installed on the mounting seat, so that the gas cavity 37 is communicated with the first gap. The gas in the gas cavity 37 can enter the first gap through the first gas throttle valve to form a first gas film in the first gap. The second gas throttle valve is installed on the mounting seat, so that the gas cavity 37 is communicated with the second gap. The gas in the gas cavity 37 can enter the second gap through the second gas throttle valve to form a second gas film in the second gap. Since the rotating shaft can drive the workbench to rotate synchronously during rotation, when the rotating shaft drives the workbench to rotate, the outer circumferential surface of the rotating shaft is separated from the air float bearing by the first gas film, and the lower end surface of the workbench is completely separated from the upper end surface of the air float bearing by the second gas film. Due to the characteristics of small air viscosity and small friction, the movement precision of the rotating shaft is higher.

[0055] The positioning device positions and installs the measured piece 5 on the product placement platform. Since there is a requirement for the phase of the measured piece 5 in the measurement process of the ultra-high precision RV reducer planet carrier, such as the average value of the data obtained by detecting three phases when detecting the installation height of the planet carrier main bearing, in the present application, the positioning device comprises a pneumatic centering claw 4 and a positioning pin. The pneumatic centering claw 4 is arranged on the turntable mechanism 3, and the positioning pin is arranged on the product placement platform. Each product on the product placement platform is fixed in phase by the corresponding positioning pin. In use, the measured piece 5 is placed on the product placement platform, its position is determined, then the phase of the measured piece 5 is fixed by the corresponding relationship between the positioning pin and the pin hole on the measured piece 5, and then the pneumatic centering claw 4 is used to clamp and position the measured piece 5. As shown in Figure 1 The pneumatic centering claw 4 comprises three claws, which can ensure a positioning accuracy of 0.02 millimeters. The positioning device can ensure that the product can be accurately fixed on the product placement platform, thereby ensuring the accuracy of subsequent measurement.

[0056] Understandably, due to the rotation of the turntable mechanism 3, the relevant air and electrical circuits require the use of power supply slip rings and air supply slip rings.

[0057] A bracket 28 is provided on the base 2, and a slide mounting plate 100 is mounted on the bracket 28. Six sets of height adjustment units 11 are provided between the slide mounting plate 100 and the bracket 28. In this embodiment, the base 2 is a marble base, and the bracket 28 is a marble support. Four sets of height adjustment units 11 are used to adjust the degrees of freedom, and two sets of height adjustment units 11 are used for auxiliary support to increase stability. This allows for adjustment of all six degrees of freedom of the slide mounting plate 100, ensuring the installation accuracy of the slide mounting plate 100. To avoid vibrations of the equipment below the base 2 affecting the measurement results, a shock-absorbing component 1, such as a shock-absorbing rubber component, is provided at the bottom of the base 2 to ensure the stability of the base 2. A laser rangefinder sensor 26 is also provided on the bracket 28 to detect whether the product to be measured 5 exists on the product placement platform. A barcode scanner 27 is also provided on the bracket 28 to identify product labels.

[0058] A first guide rail 12-1 is provided on the slide mounting plate 100, and a first slider 12-2 that cooperates with the first guide rail 12-1 is provided on the first slide 200. The first slide 200 is mounted on the slide mounting plate 100 via the first slider 12-2 and the first guide rail 12-1. The first guide rail 12-1 and the first slider 12-2 can support and fix the first slide 200, and also ensure the linear movement of the first slide 200. A first pneumatic guide rail clamp 12-3 that cooperates with the first guide rail 12-1 is provided on the slide mounting plate 100. The first guide rail 12-1 + first slider 12-2 + first pneumatic guide rail clamp 12-3 are shown in the diagram. Figure 1 The first pneumatic guide rail clamp 12-3 (reference number 12) ensures that the first slide 200 will not move, guaranteeing the stability of the components during measurement. A first limit switch 44 can also be installed on the first guide rail 12-1. This limit switch 44 acts as a limit switch, constraining the extreme positions of the first slide 200's movement.

[0059] The first drive mechanism is a linear motor 20. To reduce size, the linear motor 20 is a split-type motor, with the stator assembly and rotor assembly separate. The linear motor 20 drives the first slide table 200 to move along the guide rail. The first linear grating ruler 15 is mounted on the slide table mounting plate 100. The first linear grating ruler 15 is used to measure the horizontal displacement of the first slide table 200 and is used as feedback adjustment to achieve precise control of the first slide table 200. In this application, displacement control with an accuracy of 0.001 mm can be guaranteed.

[0060] The first sliding table 200 is provided with a second guide rail 14-1, and the second sliding table 300 is provided with a second sliding block 14-2 matched with the second guide rail 14-1. The second sliding table 300 is installed on the first sliding table 200 through the second sliding block 14-2 and the second guide rail 14-1. The second guide rail 14-1 and the second sliding block 14-2 can support and fix the second sliding table 300, and can ensure the linear movement of the second sliding table 300. The first sliding table 200 is provided with a second pneumatic guide rail clamp 14-3 matched with the second guide rail 14-1. The second guide rail 14-1+ the second sliding block 14-2+ the second pneumatic guide rail clamp 14-3 are shown in Figure 1 the middle label 14. The air clamping of the second pneumatic guide rail clamp 14-3 can ensure that the second sliding table 300 does not move, and can ensure the stability of the part during the measurement process. A second travel switch 43 can also be arranged on the second guide rail 14-1. The second travel switch 43 serves as a limit switch and can constrain the limit position of the movement of the second sliding table 300.

[0061] The second driving mechanism includes a servo motor 17, a planetary reducer 16 and a screw nut structure 19. The output shaft of the servo motor 17 is connected to the screw nut structure 19 through the planetary reducer 16. The high-tight planetary reducer 16 is used for power transmission. The screw nut structure 19 is connected to the second sliding table 300. The screw nut structure 19 can convert rotary motion and linear motion. Through the screw nut structure 19, the rotation of the output shaft of the servo motor 17 drives the second sliding table 300 to move up and down relative to the first sliding table 200. The second linear grating ruler 18 is installed on the first sliding table 200. The vertical displacement of the second sliding table 300 is measured by the second linear grating ruler 18, which serves as a feedback adjustment to realize precise control of the second sliding table 300. In this application, displacement control with an accuracy of 0.005 millimeters can be ensured.

[0062] The accuracy requirement in the horizontal direction during the measurement process is higher than that in the vertical direction. Therefore, the accuracy of the first driving mechanism is higher than that of the second driving mechanism. Since the linear motor does not provide force in the case of power failure, the second sliding table 300 will move downward under the action of gravity, and the second driving mechanism of the servo motor + screw nut structure can keep the position of the second sliding table 300 unchanged in the case of power failure.

[0063] The card spring groove height detection sensor 10 comprises a first integrated sensor, a pneumatic slide table 13 is used to drive the first integrated sensor to extend or retract, and the first integrated sensor is provided with ruby measuring heads; the pneumatic slide table 13 is driven by air, has two positions, i.e. an extended position and a retracted position, when the card spring groove height is detected, the workpiece 5 to be detected needs to be stopped at a fixed phase by the rotary table mechanism 3, the first slide table 200 is moved to a position, the second slide table 300 is moved to a suitable position, the pneumatic slide table 13 is in the extended position, then the second slide table 300 is moved, so that the two ruby measuring heads on the first integrated sensor contact the upper and lower end faces of the product card spring groove, thereby obtaining the contact measurement data of the card spring groove height detection sensor 10 on the upper and lower end faces of the product card spring groove, and then the detection data of the second linear grating ruler 18 in the measurement process is obtained, thereby obtaining the card spring groove height detection result.

[0064] The main bearing installation height detection sensor 8 comprises a second integrated sensor, and the second integrated sensor is provided with ruby measuring heads 6; when the main bearing installation height is detected, the first slide table 200 is moved to a position, the second slide table 300 is moved to a suitable position, and then the second slide table 300 is moved up and down, so that the two ruby measuring heads 6 on the second integrated sensor contact the upper and lower end faces of the product, thereby obtaining the measurement data of the main bearing installation height detection sensor 8 on the upper and lower end faces of the product, and then the detection data of the second linear grating ruler 18 in the measurement process is obtained, then the rotary table mechanism 3 is rotated to change the phase of the product, and the measurement is continued, and the average value of the data obtained by detecting three phases in the measurement process is taken as the final main bearing installation height detection result.

[0065] The outer circle detection sensor 7 comprises an inductive sensor and a roller measuring head; when the outer circle of the product is detected, the first slide table 200 is moved to a position, the second slide table 300 is moved to a position, so that the roller measuring head is attached to the outer circle of the product main bearing, then the rotary table mechanism 3 drives the workpiece 5 to be detected to rotate one round, the first slide table 200 needs to be moved during the rotation to ensure that the roller measuring head is attached to the outer circle of the product main bearing, and then the detection data of the inductive sensor and the first linear grating ruler 15 during the one round rotation is combined, and the least square method is used to fit a circle, so that the outer diameter can be obtained, and the outer circle roundness and the cylindrical degree can be calculated.

[0066] The integrated sensor in the card spring groove height detection sensor 10 and the main bearing installation height detection sensor 8 is a displacement sensor.

[0067] The second slide table 300 is provided with a mounting plate, the main bearing installation height detection sensor 8 and the outer circle detection sensor 7 are mounted on the mounting plate, and 4 groups of fine adjustment units 9 are arranged between the second slide table 300 and the mounting plate, so that the installation positions of the main bearing installation height detection sensor 8 and the outer circle detection sensor 7 on the second slide table 300 can be adjusted and controlled.

[0068] The product also needs to be detected by taper bearing hole diameter, and the pneumatic inner diameter detection mechanism can select a traditional manual operation probe or can be self-developed automatic pneumatic inner diameter detection mechanism. In the embodiment, the pneumatic inner diameter detection mechanism comprises a floating plate 29, a sliding plate 40, a fixed plate 41, a pneumatic mechanism, a precision spindle 23, a pneumatic inner diameter probe 25 and a proximity switch. The floating plate 29, the sliding plate 40 and the fixed plate 41 are shown in Figure 1 The floating plate 29 is arranged below the sliding plate 40 and is connected with the sliding plate 40 through a first connecting mechanism. The floating plate 29 floats forward, backward, left and right relative to the sliding plate 40 through the first connecting mechanism. The sliding plate 40 is arranged below the fixed plate 41 and is connected with the fixed plate 41 through a second connecting mechanism. The sliding plate 40 slides up and down relative to the fixed plate 41 through the second connecting mechanism. The proximity switch is installed between the fixed plate 41 and the sliding plate 40. The precision spindle 23 passes through the fixed plate 41 and the sliding plate 40 and is installed on the floating plate 29. The precision spindle 23 moves with the floating plate 29. The upper end of the precision spindle 23 is connected with the pneumatic mechanism, and the lower end is connected with the pneumatic inner diameter probe 25. The precision spindle 23 drives the pneumatic inner diameter probe 25 to rotate under the action of the pneumatic mechanism.

[0069] On the one hand, when the pneumatic inner diameter probe 25 collides with the measured piece 5, the sliding plate 40 will move up, so that the proximity switch sends a signal to prompt the collision event, thereby avoiding the collision. On the other hand, the floating plate 29 and the precision spindle 23 and the pneumatic inner diameter probe 25 thereon can move forward, backward, left and right in the horizontal plane, so that the pneumatic inner diameter probe 25 can enter the detection inner hole along the chamfer of the inner hole of the measured piece 5. The measuring mechanism has self-adaptability.

[0070] The first connecting mechanism comprises a first linear guide shaft 31, a first connecting sleeve 30, a second linear guide shaft 32 and a second connecting sleeve 39. Two first linear guide shafts 31 and two second linear guide shafts 32 are fixed with each other through a connecting piece. The lower end of the first connecting sleeve 30 is connected with the upper surface of the floating plate 29. Two first linear guide shafts 31 are constrained at both ends of the floating plate 29 through the first connecting sleeve 30 and move relative to the floating plate 29. The upper end of the second connecting sleeve 39 is connected with the lower end of the sliding plate 40. Two second linear guide shafts 32 are constrained at both sides of the sliding plate 40 through the second connecting sleeve 39 and move relative to the sliding plate 40. The first connecting sleeve 30 and the second connecting sleeve 39 are tight bead sleeve assemblies and are respectively sleeved on the first linear guide shaft 31 and the second linear guide shaft 32. The number of the first connecting sleeve 30 is four, and two are arranged on the first linear guide shaft 31. The number of the second connecting sleeve 39 is four, and two are arranged on the second linear guide shaft 32.

[0071] The second connecting mechanism comprises a third linear guide shaft 34 and a bushing assembly 35. The lower end of the third linear guide shaft 34 is installed on the sliding plate 40, and the upper end passes through the fixed plate 41 and cooperates with the bushing assembly 35. The bolt and gasket on the upper surface of the third linear guide shaft 34 are in contact with the upper surface of the bushing assembly 35, so as to ensure that the sliding plate 40 will not fall off. The number of the third linear guide shaft 34 is four, which are arranged at the four corners of the sliding plate 40.

[0072] The pneumatic mechanism comprises a rotary air cylinder 21 and an air cavity 37. The input end of the rotary air cylinder 21 is connected to the air cavity 37, and the output end is connected to the precision spindle 23. The precision spindle 23 is internally provided with a plurality of precision angular contact ball bearings, is connected to the rotary air cylinder 21 through a shaft coupling 36, and rotates under the driving of the rotary air cylinder 21. The measuring mechanism further comprises a rotary encoder 22 for measuring the rotation angle of the precision spindle 23. The measuring mechanism further comprises a first inductive sensor 33 and a second inductive sensor 38 for measuring the horizontal displacement of the floating plate 29 in the front-rear and left-right directions. The pneumatic internal diameter probe 25 is a multi-channel pneumatic internal diameter probe, which can automatically calculate the parameters such as the internal diameter, roundness and cylindricity of the hole in the workpiece after rotating one circle in the hole.

[0073] When detecting the upper and lower taper bearing mounting holes of the product, the rotary table mechanism 3 is required to stop the measured part 5 at a fixed phase, the first sliding table 200 and the second sliding table 300 are moved to appropriate positions, the pneumatic internal diameter probe 25 of the pneumatic internal diameter detection mechanism is extended into the lower taper bearing hole, then the pneumatic mechanism drives the pneumatic internal diameter probe 25 to rotate 180°, the pneumatic internal diameter probe 25 is a four-channel pneumatic internal diameter probe, the data change of the four-channel pneumatic internal diameter probe 25 is recorded during the rotation, the rotation angle of the precision spindle 23 is measured by using the rotary encoder 22, the diameter of the lower taper bearing hole is obtained by using the average value of the data of the pneumatic internal diameter probe 25, and the roundness and cylindricity are obtained by using the data of the four-channel pneumatic internal diameter probe 25; the corresponding data of the upper taper bearing hole are obtained in a similar manner. The first inductive sensor 33 and the second inductive sensor 38 on the floating plate 29 are respectively used for measuring the horizontal displacement of the floating plate 29 in the front-rear direction and the left-right direction. When measuring the upper and lower taper bearing holes, the values of the two inductive sensors are recorded at the same time, and the coaxiality of the two taper bearing holes is obtained by combining the above data.

[0074] It can be understood that, in the above measurement process, the positions of the first sliding table 200 and the second sliding table 300 are fixed by the two pneumatic guide rail clamps.

[0075] The preferred embodiments of the present application have been described above in detail. It should be understood that modifications and variations to the preferred embodiments could be made by those skilled in the art in light of the teachings above. It is therefore contemplated that the application can encompass other variations and modifications that fall within the scope of the claims.

Claims

1. A measuring device for an ultra-high precision RV reducer planet carrier, characterized in that, The utility model relates to a kind of automatic measuring device for the height of spring groove and the height of bearing installation of shaft, including: Base; Product placement platform, the product placement platform is used to place the piece to be measured; Rotary table mechanism, the rotary table mechanism is installed on base, the product placement platform is connected with rotary table mechanism, the rotary table mechanism is used to drive the product placement platform relative to base rotation; Positioning device, the positioning device is matched with the piece to be measured, for positioning and fixing the piece to be measured on product placement platform; Slide mounting plate, installed on the base; First slide, installed on the slide mounting plate; First drive mechanism, for driving the first slide left and right along the slide mounting plate; First linear grating ruler, installed on the slide mounting plate, for detecting the displacement of first slide; Second slide, installed on the first slide; Second drive mechanism, for driving the second slide up and down along the first slide; Second linear grating ruler, installed on the slide mounting plate, for detecting the displacement of second slide; Pneumatic slide, installed on the second slide; Spring groove height detection sensor, installed on the pneumatic slide, for measuring the height of spring groove of the piece to be measured; Main bearing installation height detection sensor, installed on the second slide, for measuring the height of bearing installation of the piece to be measured; Circumference detection sensor, installed on the second slide, for measuring the outer diameter, roundness and cylindricity of main bearing of the piece to be measured; Pneumatic inner diameter detection mechanism, installed on the second slide, for measuring the diameter of taper bearing hole of the piece to be measured; Controller, connected with the rotary table mechanism, first drive mechanism, first linear grating ruler, second drive mechanism, second linear grating ruler, pneumatic slide, spring groove height detection mechanism, main bearing installation height detection sensor, circumference detection mechanism and pneumatic inner diameter detection mechanism; The spring groove height detection sensor includes first integrated sensor, the pneumatic slide is used to drive the first integrated sensor to extend or retract, the first integrated sensor is provided with ruby probe;The main bearing installation height detection sensor includes second integrated sensor, and the second integrated sensor is provided with ruby probe;The circumference detection sensor includes inductive sensor and roller probe, and pneumatic inner diameter detection mechanism includes floating plate, sliding plate, fixed plate, pneumatic mechanism, precision spindle, pneumatic inner diameter probe and proximity switch, floating plate is arranged below sliding plate and is connected with sliding plate through first connecting mechanism, and floating plate is floated front and back and left and right relative to sliding plate through first connecting mechanism; Sliding plate is arranged below fixed plate and is connected with fixed plate through second connecting mechanism, and sliding plate is slid up and down relative to fixed plate through second connecting mechanism, and proximity switch is installed between fixed plate and sliding plate;Precision spindle passes through fixed plate and sliding plate and is installed on floating plate, and moves along with the movement of floating plate, and the upper end of precision spindle is connected with pneumatic mechanism, and the lower end is connected with pneumatic inner diameter probe, and precision spindle drives pneumatic inner diameter probe to rotate under the action of pneumatic mechanism.

2. The measuring apparatus for the planetary carrier of an ultra-high precision RV reducer according to claim 1, characterized in that, The rotary table mechanism includes motor air bearing rotary table and angular displacement encoder, and the angular displacement encoder is used to measure the rotation angle of motor air bearing rotary table.

3. The measuring apparatus for the planetary carrier of an ultra-high precision RV reducer according to claim 1, characterized in that, The positioning device comprises pneumatic centering clamps arranged on a rotary table mechanism and positioning pins arranged on the product placing platform.

4. The measuring apparatus for the planetary carrier of an ultra-high precision RV reducer according to claim 1, characterized in that, The first slide is provided with a first guide rail, and the first slide table is provided with a first sliding block matched with the first guide rail.

5. The measuring apparatus for the planetary carrier of an ultra-high precision RV reducer according to claim 1, characterized in that, The first slide is provided with a second guide rail, and the second slide table is provided with a second sliding block matched with the second guide rail.

6. The measuring apparatus for the planet carrier of an ultra-high precision RV reducer according to claim 1, characterized in that, The first drive mechanism is a linear motor; the second drive mechanism comprises a servo motor, a planetary reducer and a screw nut structure, the output shaft of the servo motor is connected with the screw nut structure through the planetary reducer, the screw nut structure is connected with the second slide table, and the rotation of the output shaft of the servo motor drives the second slide table to move up and down relative to the first slide table through the screw nut structure.

7. The measuring apparatus for the planet carrier of an ultra-high precision RV reducer according to claim 1, characterized in that, The second slide table is provided with a mounting plate, the main bearing installation height detection sensor and the outer circle detection sensor are installed on the mounting plate, and four groups of fine adjustment units are arranged between the second slide table and the mounting plate.

8. The measuring apparatus for the planetary carrier of an ultra-high precision RV reducer according to claim 1, characterized in that, The base is provided with a support, the slide mounting plate is installed on the support, and six groups of height adjustment units are arranged between the slide mounting plate and the support.

9. The measuring apparatus for the planet carrier of an ultra-high precision RV reducer according to claim 1, characterized in that, The bottom end of the base is provided with a damping assembly.

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