Precision detection device for planetary roller screw pair

Abstract

The invention discloses a precision detection device for a planetary roller screw pair, which comprises a detection table, two groups of support rods symmetrically arranged between and below the two fixed plates, and a positioning assembly arranged between the two fixed plates and fixedly connected with the two groups of support rods, and is characterized in that the top of the detection table is symmetrically provided with fixed plates, and a servo motor is fixedly arranged above one side of the fixed plate on one side of the detection table. The positioning assembly comprises two moving frames and limiting assemblies, and the limiting assemblies are symmetrically arranged on the two sides of the two moving frames; according to the planetary roller screw pair positioning device, the positioning plates of different sizes can be conveniently switched for different types of planetary roller screw pairs, so that reliable positioning of a nut or a lead screw can be conveniently realized according to the types of the planetary roller screw pairs, and the reverse planetary roller screw pair can be positioned after switching; according to the utility model, multi-point positioning can be rapidly carried out on the lead screw in the planetary roller lead screw pair, movement of the lead screw in the reverse planetary roller lead screw pair is facilitated, rotation of the lead screw in the movement process is avoided, and the detection precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of planetary roller screw pair production, in particular to a precision detection device for planetary roller screw pair. BACKGROUND

[0002] The planetary roller screw pair is a kind of high-precision mechanical transmission mechanism that converts system input rotary torque into linear thrust, and its basic principle is similar to that of the ball screw. Compared with the ball screw, the force mode of the planetary roller screw pair is linear contact, and the increase of the contact surface greatly improves the carrying capacity and rigidity of the planetary roller screw pair. And the planetary roller screw has the advantages of high speed, long service life and high motion precision. These characteristics of the planetary roller screw mechanism make it an ideal choice for applications with harsh working conditions and long-term continuous operation.

[0003] The precision detection device for planetary roller screw pair with the publication number CN221506273U sets up the movable support plate and the linear adjusting mechanism, which is convenient for clamping and fixing the screw of different lengths, sets up the first three-jaw chuck and the second three-jaw chuck, which is convenient for fixing the screw of different diameters, sets up the limiting mechanism, which is convenient for limiting the nut of different sizes, and then the precision detection of the planetary roller screw pair of different models can be carried out, which is convenient and fast to operate and has strong practicality. However, in actual use, the planetary roller screw pair can be divided into forward planetary roller screw pair (screw rotation drives nut movement) and reverse planetary roller screw pair (nut rotation drives screw movement) during measurement. During detection, whether it is a forward planetary roller screw pair or a reverse planetary roller screw pair, reliable positioning is required. The forward planetary roller screw pair mainly needs to fix the nut, and since the nut is small in size, the fixing clamp is also small in size. However, when positioning the screw rod on the reverse planetary roller screw pair, since the screw rod is long in length, a large-size clamp is required for fixation. If a large-size clamp is used to fix the nut in the forward planetary roller screw pair, the outside of the nut is not flat, and the fixing effect of the nut cannot be guaranteed. Therefore, during detection of the planetary roller screw pair, it is inconvenient to detect different types of planetary roller screw pairs. If different clamps are directly replaced, during detection of the reverse planetary roller screw pair, since the nut rotates to drive the screw to move, it is inconvenient to perform multi-point positioning during the movement of the screw, the screw on the reverse planetary roller screw pair cannot be quickly fixed, the fixing effect of the screw cannot be guaranteed, and there are certain use defects.

[0004] Therefore, we propose a precision detection device for planetary roller screw pair to solve the problems mentioned above. SUMMARY

[0005] The present application aims to provide a precision detection device for planetary roller screw pair, to solve the problem of inconvenient detection of different types of planetary roller screw pair when detecting the planetary roller screw pair, and the problem of inconvenient multi-point positioning during the movement of the screw, the quick fixing of the screw on the reverse planetary roller screw pair, and the guarantee of the fixing effect of the screw when directly replacing different clamps to detect the reverse planetary roller screw pair.

[0006] To achieve the above object, the present application provides the following technical scheme: a precision detection device for planetary roller screw pair, comprising a detection table, a fixed plate is symmetrically installed on the top of the detection table, a servo motor is fixedly installed on the upper side of one side of the fixed plate, and a three-jaw chuck is symmetrically arranged on the top of the detection table, and the output end of the servo motor passes through the one side fixed plate and is fixedly connected with the one side three-jaw chuck;

[0007] Further comprising:

[0008] Two groups of supporting rods are symmetrically installed between the two fixed plates;

[0009] A positioning assembly is arranged between the two fixed plates, and the positioning assembly comprises two moving frames;

[0010] A limiting assembly is symmetrically arranged on both sides of the two moving frames;

[0011] The moving frames are symmetrically arranged on the upper side of the detection table, rotating discs are rotatably connected to the upper sides of the interiors of the two moving frames, limiting frames are fixedly installed on the lower sides of the sides away from each other of the two moving frames, the limiting frames are fixedly connected with the supporting rods, screw rods are symmetrically screw-connected to the interiors of the rotating discs, first and second positioning plates are rotatably connected to one ends of the two screw rods respectively, guide rods are symmetrically installed on both sides of the first and second positioning plates, and the guide rods are slidingly connected with the rotating discs.

[0012] Preferably, fixed rods are fixedly installed on the upper sides of the sides away from each other of the two rotating discs, cams are fixedly installed on the ends of the fixed rods away from the rotating discs, supporting frames are symmetrically installed on the lower sides of the moving frames located on the rotating discs, sliding frames are slidingly connected in the interiors of the two supporting frames, and the cams are slidingly connected with the sliding frames.

[0013] By adopting the above technical scheme, the rotating of the rotating disc can lift the sliding frame.

[0014] Preferably, one end of the movable frame is fixedly provided with a moving plate, and one side of each of the two moving plates is fixedly provided with a moving rod, and the outer sides of the two groups of supporting rods are symmetrically and slidably connected with movable plates, and a movable seat is fixedly arranged between the two movable plates, and a mounting slot is formed in one side of the movable seat, and the mounting slot is symmetrically and slidably connected with limiting rods, and the outer sides of the two limiting rods are slidably connected with a connecting frame, and the two moving rods are slidably connected with the connecting frame.

[0015] By adopting the above technical scheme, the movement of the moving rod can drive the movement of the connecting frame.

[0016] Preferably, a reset spring is sleeved around the outer lower side of each of the two limiting rods, and the two ends of the reset spring are fixedly connected with the connecting frame and the mounting slot respectively, and symmetrical movable slots are formed in the lower sides of the two sides of the movable seat, and the bottom of the connecting frame is symmetrically provided with a positioning rod, and the positioning rod is slidably connected with the movable seat.

[0017] By adopting the above technical scheme, the connecting frame can be automatically reset after moving.

[0018] Preferably, a rectangular slot is formed in the bottom of the detection table below the movable seat, and a through slot is formed in the top of the detection table below the two second positioning plates, and the bottom of the detection table is symmetrically provided with a fixed block, and a lead screw is rotatably connected between the two fixed blocks, and a regulating motor is fixedly arranged on one side of the left fixed block, and the output end of the regulating motor is fixedly connected with the lead screw through the left fixed block.

[0019] By adopting the above technical scheme, the position of the positioning seat can be adjusted.

[0020] Preferably, a positioning seat is threadedly connected with the outer side of the lead screw, and the top of the positioning seat is attached with the detection table, and symmetrical positioning slots are formed in the top of the positioning seat, and the positioning rod is inserted into the positioning slots.

[0021] By adopting the above technical scheme, the movable seat can be freely moved after the positioning rod is separated from the positioning slots.

[0022] Preferably, a connecting plate is fixedly arranged on one side of the connecting frame, and symmetrical sliding rods are arranged on the top of the connecting plate, and a positioning frame is slidably arranged on the outer upper sides of the two sliding rods, and the positioning frame is fixedly connected with the movable seat, and arc-shaped plates are fixedly arranged on the top ends of the two sliding rods, and a plurality of racks are fixedly arranged on the top of each arc-shaped plate, and a rotating seat is rotatably arranged on the upper side of one side of the movable seat, and the three-jaw chuck is fixedly connected with the rotating seat on the other side, and a limiting gear ring is fixedly arranged on the outer side of the rotating seat.

[0023] By adopting the above technical scheme, the movement of the sliding rods can position the rotating seat.

[0024] Preferably, the limiting assembly comprises two groups of mounting rods symmetrically mounted above two sides of the moving frame, one side of each group of two mounting rods is sleeved with a telescopic spring, and the ends of the two mounting rods away from the moving frame are fixedly provided with a connecting strip, the outer sides of the two mounting rods located on one side of the telescopic spring are slidingly connected with a limiting plate, and the two ends of the telescopic spring are fixedly connected with the limiting plate and the moving frame.

[0025] By adopting the above technical scheme, the limiting plate can be automatically reset after moving.

[0026] Preferably, one side of the rotating disc is symmetrically provided with an L-shaped rod, one side of the limiting plate is provided with a limiting hole, the outer side of the L-shaped rod is fixedly provided with a circular plate, the circular plate abuts against the limiting plate, and the telescopic spring is in a stretched state.

[0027] By adopting the above technical scheme, the rotating disc can be reliably positioned.

[0028] Compared with the prior art, the precision detection device for the planetary roller screw pair has the advantages that: the device can switch different sizes of the positioning plate when facing different types of the planetary roller screw pair, and then can reliably position the nut or the screw rod according to the type of the planetary roller screw pair, and after switching, the device can quickly multi-point position the screw rod in the planetary roller screw pair when positioning the reverse planetary roller screw pair, which facilitates the movement of the screw rod in the reverse planetary roller screw pair, avoids the rotation of the screw rod during movement, and improves the detection precision.

[0029] 1. When testing a planetary roller screw pair, if testing a forward planetary roller screw pair, place both ends of the screw on two three-jaw chucks and fix them. Then rotate the screw to bring the two first positioning plates closer together, fixing the external nut of the screw. Start the servo motor to rotate one side of the three-jaw chuck, which rotates the screw and the other side, causing the external nut of the screw to rotate. This moves the moving frame, and the moving frame moves the limit frame to slide on the support rod. A laser displacement sensor is installed on one side of the limit frame. The transmission accuracy of the forward planetary roller screw pair can be calculated by comparing the number of rotations of the screw with the displacement distance of the nut detected by the laser displacement sensor. When testing a reverse planetary roller screw pair, rotate the turntable half a turn, causing the second positioning plate to rotate circumferentially above the moving frame. The turntable drives the cam to rotate, which lifts the moving frame. After the moving frame is lifted, it moves the moving rod on the moving plate upward. After the moving rod moves upward, it can... The connecting frame is moved upward, which stretches the return spring. After the connecting frame moves upward, it moves the two positioning rods upward, causing the positioning rods to leave the positioning slots on the positioning seat, thus causing the movable seat to lose its limit. Then, the connecting shaft on the nut inside the reverse planetary roller screw pair is fixed by a three-jaw chuck on one side. Then, a three-jaw chuck on the other side can fix one end of the screw on the reverse planetary roller screw pair. The screw on the reverse planetary roller screw pair is fixed by a second positioning plate. The operation of the servo motor can drive the nut in the reverse planetary roller screw pair to rotate, causing the screw to move. During the movement, the screw can be positioned by the second positioning plate. At the same time, the screw is positioned and supported by the three-jaw chuck, which can perform multi-point positioning of the screw. Reliable positioning of the nut or screw can be achieved according to the type of planetary roller screw pair. After switching, when positioning the reverse planetary roller screw pair, multi-point positioning of the screw in the planetary roller screw pair can be performed quickly, which facilitates the movement of the screw in the reverse planetary roller screw pair and avoids rotation of the screw during movement, thus improving the detection accuracy.

[0030] 2. When inspecting the reverse planetary roller screw assembly, the rotating turntable can lift the connecting frame upwards. After the connecting frame moves upwards, it can drive the sliding rod upwards. After the sliding rod moves upwards, it slides on the positioning frame, causing the rack on the arc plate to be locked outside the limiting tooth ring. This allows the rotating seat to be positioned, and the three-jaw chuck on the other side to be positioned as well. Thus, when inspecting the reverse planetary roller screw assembly, the three-jaw chuck on the other side provides positioning support for one end of the screw, and the rotating seat is positioned, which can prevent the screw from rotating with the nut, avoid affecting the measurement accuracy, and improve the quality of inspection.

[0031] 3. When rotating the rotating disc, the two limiting plates are moved to slide on the mounting rods and stretch the extension springs, so that the limiting holes on the limiting plates are disengaged from the L-shaped rods, then the rotating disc is rotated, after half a rotation, the limiting plates are moved to align the L-shaped rods with the limiting holes on the other limiting plates, then the limiting plates are released, the L-shaped rods are inserted into the limiting holes under the action of the extension springs, the limiting plates are attached to the circular plate, at this time, the extension springs are in the stretched state, the limiting plates are not easy to disengage from the L-shaped rods, so that the rotating disc is conveniently positioned, and the reliability and convenience of the rotating disc positioning can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a whole structure schematic view of the present application;

[0033] Figure 2 It is another perspective view of the whole structure schematic view of the present application;

[0034] Figure 3 It is a structure schematic view of the positive and negative planetary roller screw pair of the present application;

[0035] Figure 4 It is a structure schematic view of the positioning assembly of the present application;

[0036] Figure 5 It is a structure schematic view of the movable frame of the present application;

[0037] Figure 6 It is a structure schematic view of the movable seat of the present application;

[0038] Figure 7 It is a structure schematic view of the positioning seat of the present application;

[0039] Figure 8 It is a structure schematic view of the positioning assembly of the present application;

[0040] Figure 9 It is a structure schematic view of the positioning assembly of the present application; Figure 4 It is an enlarged structure schematic view of the A area in the present application.

[0041] In the figure: 1, detection platform; 101, fixed plate; 102, servo motor; 103, three-jaw chuck; 104, support rod; 2, positioning assembly; 201, moving frame; 202, limit frame; 203, turntable; 204, screw rod; 205, guide rod; 206, first positioning plate; 207, second positioning plate; 208, fixed rod; 209, cam; 210, support frame; 211, movable frame; 212, moving plate; 213, moving rod; 214, movable plate; 215, movable seat; 2151, rectangular groove; 216, mounting groove; 217, limiting rod; 218, connecting frame; 2181, movable groove; 219, return spring; 220, positioning rod; 221, fixed block; 222, screw rod; 223, positioning seat; 224, positioning groove; 225, connecting plate; 226, sliding rod; 227, positioning frame; 228, arc plate; 229, rack; 230, rotating seat; 231, limiting gear ring; 3, limiting assembly; 301, mounting rod; 302, telescopic spring; 303, connecting strip; 304, limiting plate; 305, L-shaped rod; 306, limiting hole; 307, round plate. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] Please refer to Figures 1-9 The present application provides a technical solution: a precision detection device for planetary roller screw pair, comprising a detection platform 1, the top of the detection platform 1 is symmetrically provided with a fixed plate 101, one side of the fixed plate 101 is fixedly provided with a servo motor 102 above, and the top of the detection platform 1 is symmetrically provided with a three-jaw chuck 103, and the output end of the servo motor 102 penetrates through one side of the fixed plate 101 and is fixedly connected with one side of the three-jaw chuck 103;

[0044] Further comprising:

[0045] Two groups of support rods 104 are symmetrically installed between the two fixed plates 101 below;

[0046] The positioning assembly 2 is arranged between the two fixed plates 101, and the positioning assembly 2 comprises two moving frames 201;

[0047] The mobile frame 201 is symmetrically arranged on the upper side of the detection table 1, the upper side of the two mobile frames 201 is rotationally connected with a rotating disc 203, the lower side of the side away from the two mobile frames 201 is fixedly installed with a limiting frame 202, the limiting frame 202 is fixedly connected with the supporting rod 104, the inside of the rotating disc 203 is symmetrically screw-connected with a screw rod 204, the one end of the two screw rods 204 is rotationally connected with a first positioning plate 206 and a second positioning plate 207 respectively, the two sides of the first positioning plate 206 and the second positioning plate 207 are symmetrically installed with a guide rod 205, and the guide rod 205 is slidingly connected with the rotating disc 203;

[0048] The upper side of the side away from the two rotating discs 203 is fixedly installed with a fixed rod 208, the one end of the fixed rod 208 away from the rotating disc 203 is fixedly installed with a cam 209, the lower side of the side of the mobile frame 201 is symmetrically installed with a supporting frame 210, the inside of the two supporting frames 210 is slidingly connected with a movable frame 211, and the cam 209 is slidingly connected with the movable frame 211;

[0049] The one end of the movable frame 211 is fixedly installed with a moving plate 212, the one side of the two moving plates 212 is fixedly installed with a moving rod 213, the outside of the two groups of supporting rods 104 is symmetrically slidingly connected with a movable plate 214, the movable plate 214 is fixedly installed between the two movable plates 214, the one side of the movable seat 215 is penetratingly provided with an installation slot 216, the inside of the installation slot 216 is symmetrically slidingly connected with a limiting rod 217, the outside of the two limiting rods 217 is slidingly connected with a connecting frame 218, and the two moving rods 213 are slidingly connected with the connecting frame 218;

[0050] The outside of the two limiting rods 217 is sleeved with a reset spring 219, the two ends of the reset spring 219 are fixedly connected with the connecting frame 218 and the installation slot 216 respectively, the two sides of the movable seat 215 are symmetrically penetratingly provided with a movable slot 2181, the bottom of the connecting frame 218 is symmetrically installed with a positioning rod 220, and the positioning rod 220 is slidingly connected with the movable seat 215;

[0051] The bottom of the detection table 1 is penetratingly provided with a rectangular slot 2151 below the movable seat 215, the top of the detection table 1 is penetratingly provided with a through slot below the two second positioning plates 207, the bottom of the detection table 1 is symmetrically installed with a fixed block 221, the two fixed blocks 221 are rotationally connected with a lead screw 222, the one side of the left fixed block 221 is fixedly installed with an adjusting motor, and the output end of the adjusting motor is fixedly connected with the lead screw 222 through the left fixed block 221;

[0052] The lead screw 222 is threaded to a positioning seat 223 on its outer side, and the top of the positioning seat 223 is in contact with the testing table 1. The positioning seat 223 has symmetrical positioning grooves 224 on both sides of its top, and the positioning rod 220 is inserted into the positioning grooves 224.

[0053] Example 1: As Figures 1-8 As shown, when inspecting a planetary roller screw assembly, if inspecting a forward planetary roller screw assembly, the two ends of the screw on the forward planetary roller screw assembly are placed on two three-jaw chucks 103 respectively and then fixed. Then, the screw 204 is rotated to bring the two first positioning plates 206 closer together, so that the two first positioning plates 206 fix the external nut of the screw. The servo motor 102 is started to rotate one side of the three-jaw chuck 103, which in turn rotates the screw. This rotates the other side of the three-jaw chuck 103, causing the external nut of the screw to rotate, thus moving the moving frame 201. The moving frame 201 moves... Simultaneously, the limiting frame 202 slides on the support rod 104. A laser displacement sensor is installed on one side of the limiting frame 202. The transmission accuracy of the forward planetary roller screw pair can be calculated based on the number of rotations of the lead screw and the distance of the nut displacement detected by the laser displacement sensor. When testing the reverse planetary roller screw pair, the turntable 203 is rotated half a turn, causing the second positioning plate 207 to rotate circumferentially above the movable frame 201. The turntable 203 drives the cam 209 to rotate, which lifts the movable frame 211. After the movable frame 211 is lifted, it can drive the moving rod 213 on the movable plate 212 to move upward. After the moving rod 213 moves upward, it can drive the connecting frame 218 to move upward, thus stretching the return spring 219. After the connecting frame 218 moves upward, it can drive the two positioning rods 220 to move upward, causing the positioning rods 220 to leave the positioning grooves 224 on the positioning seat 223, causing the movable seat 215 to lose its limit. Then, the connecting shaft on the internal nut of the reverse planetary roller screw pair is fixed by the three-jaw chuck 103 on one side. Then, the three-jaw chuck 103 on the other side can fix one end of the screw on the reverse planetary roller screw pair. The screw on the reverse planetary roller screw pair is fixed by the second positioning plate 207. The operation of the servo motor 102 can drive the nut in the reverse planetary roller screw pair to rotate, causing the screw to move. During the movement, the screw can be positioned by the second positioning plate 207, and the screw is also positioned and supported by the three-jaw chuck 103. This allows for multi-point positioning of the screw. Depending on the type of planetary roller screw pair, the nut or the screw can be reliably positioned. After switching, when positioning the reverse planetary roller screw pair, the screw in the planetary roller screw pair can be quickly positioned at multiple points, facilitating the movement of the screw in the reverse planetary roller screw pair and preventing rotation during the movement of the screw, thus improving the accuracy of the detection.

[0054] One side of the connecting frame 218 is fixedly installed with a connecting plate 225, and the top of the connecting plate 225 is symmetrically installed with sliding rods 226, and the outer sides of the two sliding rods 226 are slidably connected with positioning frames 227, and the positioning frames 227 are fixedly connected with the movable seat 215, and the top ends of the two sliding rods 226 are fixedly installed with arc-shaped plates 228, and the top of the arc-shaped plate 228 is fixedly installed with a plurality of racks 229, and the outer side of the movable seat 215 is rotatably connected with a rotating seat 230, and the other side of the three-jaw chuck 103 is fixedly connected with the rotating seat 230, and the outer side of the rotating seat 230 is fixedly installed with a limiting tooth ring 231.

[0055] Embodiment two: as shown in Figure 6 and Figure 8 When detecting the reverse planetary roller screw pair, the connecting frame 218 can be lifted upward by rotating the rotating disc 203, and after the connecting frame 218 moves upward, the sliding rods 226 can be driven to move upward, and after the sliding rods 226 move upward, the racks 229 on the arc-shaped plates 228 are clamped on the outer sides of the limiting tooth rings 231, so that the rotating seat 230 can be positioned, and the three-jaw chuck 103 on the other side is positioned, so that when detecting the reverse planetary roller screw pair, the three-jaw chuck 103 on the other side positions and supports one end of the screw, and the rotating seat 230 is positioned, which can avoid the screw rotating with the nut, avoid affecting the measurement accuracy, and improve the detection quality.

[0056] The limiting assembly 3 is symmetrically arranged on the two sides of the moving frame 201;

[0057] The limiting assembly 3 includes two groups of installation rods 301 symmetrically installed on the upper sides of the moving frame 201, and one side of each of the two installation rods 301 is sleeved with a telescopic spring 302, and the ends of the two installation rods 301 away from the moving frame 201 are fixedly installed with connecting strips 303, and the outer sides of the two installation rods 301 are slidably connected with limiting plates 304 on one side of the telescopic spring 302, and the two ends of the telescopic spring 302 are fixedly connected with the limiting plate 304 and the moving frame 201 respectively;

[0058] One side of the rotating disc 203 is symmetrically installed with L-shaped rods 305, and the limiting holes 306 are formed in one side of the limiting plate 304, and the outer side of the L-shaped rod 305 is fixedly installed with a circular plate 307, and the circular plate 307 abuts against the limiting plate 304, and the telescopic spring 302 is in a stretched state.

[0059] Embodiment three: as shown in Figure 4 and Figure 9As shown, when the rotating disc 203 is rotated, the two limiting plates 304 are moved, so that the limiting plates 304 slide on the mounting rods 301 and stretch the extension springs 302, and then the limiting holes 306 on the limiting plates 304 are disengaged from the L-shaped rods 305, and then the rotating disc 203 is rotated, after the rotating disc 203 rotates half a circle, the limiting plates 304 are moved, so that the L-shaped rods 305 are aligned with the limiting holes 306 on the other limiting plates 304, and then the limiting plates 304 can be released, under the action of the extension springs 302, the L-shaped rods 305 are inserted into the limiting holes 306, so that the limiting plates 304 are attached to the circular plate 307, at this time, the extension springs 302 are in a stretched state, so that the limiting plates 304 are not easy to disengage from the L-shaped rods 305, and then the staff can conveniently position the rotating disc 203, and the reliability and convenience of the positioning of the rotating disc 203 can be ensured.

[0060] Working principle: when the precision detection device for the planetary roller screw pair is used, first, according to Figures 1-9As shown, when detecting the planetary roller screw pair, if the forward planetary roller screw pair is detected, the two ends of the screw on the forward planetary roller screw pair are respectively placed on the two three-jaw chucks 103, and then fixed, and then the screw rod 204 is rotated to drive the two first positioning plates 206 to approach, so that the two first positioning plates 206 fix the external nut of the screw, the servo motor 102 is started to drive one side three-jaw chuck 103 to rotate, so that the screw can be driven to rotate, the other side three-jaw chuck 103 is driven to rotate, so that the external nut of the screw rotates, the moving frame 201 moves, and the limiting frame 202 slides on the supporting rod 104 while the moving frame 201 moves, the laser displacement sensor is arranged on one side limiting frame 202, then the number of rotations of the screw and the distance of the nut displacement detected by the laser displacement sensor can be calculated, and the transmission accuracy of the forward planetary roller screw pair can be calculated. When detecting the reverse planetary roller screw pair, rotate the turntable 203 by half a circle, so that the second positioning plate 207 rotates circumferentially above the moving frame 201, the cam 209 is driven to rotate by the turntable 203, so that the cam 209 can lift the movable frame 211, the movable plate 212 and the moving rod 213 can be lifted after the movable frame 211 is lifted, the connecting frame 218 can be lifted after the moving rod 213 is lifted, so that the return spring 219 can be stretched, the two positioning rods 220 can be lifted after the connecting frame 218 is lifted, so that the positioning rods 220 are away from the positioning grooves 224 on the positioning seat 223, so that the movable seat 215 loses the limit, then one side three-jaw chuck 103 is used to fix the connecting shaft on the internal nut of the reverse planetary roller screw pair, then the other side three-jaw chuck 103 can fix one end of the screw on the reverse planetary roller screw pair, the screw on the reverse planetary roller screw pair is fixed by the second positioning plate 207, and the nut in the reverse planetary roller screw pair is driven to rotate by the operation of the servo motor 102, so that the screw moves, and the screw is positioned by the second positioning plate 207 during movement, and the screw is positioned and supported by the three-jaw chuck 103, so that the screw can be multi-point positioned;

[0061] When the reverse planetary roller screw pair is detected, the connecting frame 218 can be lifted up through the rotation of the turntable 203, the connecting frame 218 moves upwards and drives the sliding rod 226 to move upwards, the sliding rod 226 moves upwards and slides on the positioning frame 227, so that the rack 229 on the arc plate 228 is clamped outside the limiting tooth ring 231, and then the rotating seat 230 can be positioned, so that the three-jaw chuck 103 on the other side is positioned, and then when the reverse planetary roller screw pair is detected, the three-jaw chuck 103 on the other side supports the one end of the screw, and the rotating seat 230 is positioned, so that the screw does not rotate with the nut, when the turntable 203 is rotated, the two limiting plates 304 are moved, so that the limiting plate 304 slides on the mounting rod 301 and stretches the extension spring 302, so that the limiting hole 306 on the limiting plate 304 is separated from the L-shaped rod 305, then the turntable 203 is rotated, after the turntable 203 rotates half a circle, the limiting plate 304 is moved to align the L-shaped rod 305 with the limiting hole 306 on the other limiting plate 304, then the limiting plate 304 can be loosened, the L-shaped rod 305 is inserted into the limiting hole 306 under the action of the extension spring 302, so that the limiting plate 304 is attached to the circular plate 307, at this time the extension spring 302 is in a stretched state, so that the limiting plate 304 is not easy to separate from the L-shaped rod 305, and then it is convenient for the staff to position the turntable 203.

[0062] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0063] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A precision detection device for planetary roller screw pair, comprising a detection table (1), the top of the detection table (1) is symmetrically provided with a fixed plate (101), one side of the fixed plate (101) is fixedly provided with a servo motor (102) above, and the top of the detection table (1) is symmetrically provided with a three-jaw chuck (103), and the output end of the servo motor (102) penetrates through one side of the fixed plate (101) and is fixedly connected with one side of the three-jaw chuck (103); characterized in that Further comprising: Two groups of supporting rods (104) are symmetrically installed between the two fixed plates (101) below; A positioning assembly (2) is arranged between the two fixed plates (101), and the positioning assembly (2) comprises two moving frames (201); A limiting assembly (3) is symmetrically arranged on both sides of the two moving frames (201); The moving frame (201) is symmetrically arranged on one side above the detection table (1), a turntable (203) is rotatably connected to the inside above of the two moving frames (201), a limiting frame (202) is fixedly installed below the side away from each other of the two moving frames (201), and the limiting frame (202) is fixedly connected with the supporting rod (104), the inside of the turntable (203) is symmetrically screw-connected with a screw rod (204), one end of the two screw rods (204) is respectively rotatably connected with a first positioning plate (206) and a second positioning plate (207), the two sides of the first positioning plate (206) and the second positioning plate (207) are symmetrically provided with a guide rod (205), and the guide rod (205) is slidably connected with the turntable (203).

2. The precision detection device for a planetary roller screw pair according to claim 1, characterized in that: A fixed rod (208) is fixedly installed above the side away from each other of the two turntables (203), a cam (209) is fixedly installed at the end of the fixed rod (208) away from the turntable (203), a supporting frame (210) is symmetrically installed below the turntable (203) on one side of the moving frame (201), the inside of the two supporting frames (210) is slidably connected with a movable frame (211), and the cam (209) is slidably connected with the movable frame (211).

3. The precision detection device for a planetary roller screw pair according to claim 2, characterized in that: One end of the movable frame (211) is fixedly installed with a moving plate (212), one side of the two moving plates (212) is fixedly installed with a moving rod (213), the outside of the two groups of supporting rods (104) is symmetrically slidably connected with a movable plate (214), the two movable plates (214) are fixedly installed with a movable seat (215) between them, one side of the movable seat (215) is provided with an installation slot (216), the inside of the installation slot (216) is symmetrically slidably connected with a limiting rod (217), the outside of the two limiting rods (217) is slidably connected with a connecting frame (218), and the two moving rods (213) are slidably connected with the connecting frame (218).

4. The precision detection device for a planetary roller screw pair according to claim 3, characterized in that: The lower part of the two limiting rods (217) is sleeved with a reset spring (219), and the two ends of the reset spring (219) are fixedly connected with the connecting frame (218) and the mounting groove (216), and the lower part of the two sides of the movable seat (215) is symmetrically provided with a movable groove (2181), and the bottom of the connecting frame (218) is symmetrically provided with a positioning rod (220), and the positioning rod (220) is slidably connected with the movable seat (215).

5. The precision detection device for a planetary roller screw pair according to claim 4, characterized in that: The bottom of the detection table (1) is provided with a rectangular groove (2151) below the movable seat (215), and the top of the detection table (1) is provided with a through groove below the two second positioning plates (207), and the bottom of the detection table (1) is symmetrically provided with a fixed block (221), and the two fixed blocks (221) are rotatably connected with a lead screw (222), and the left fixed block (221) is fixedly installed with an adjusting motor, and the output end of the adjusting motor is fixedly connected with the lead screw (222) through the left fixed block (221).

6. The precision detection device for a planetary roller screw pair according to claim 5, characterized in that: The outer side of the lead screw (222) is threadedly connected with a positioning seat (223), and the top of the positioning seat (223) is attached to the detection table (1), and the top of the positioning seat (223) is symmetrically provided with a positioning groove (224), and the positioning rod (220) is inserted into the positioning groove (224).

7. The precision detection device for a planetary roller screw pair according to claim 4, characterized in that: The connecting plate (225) is fixedly installed on one side of the connecting frame (218), and the top of the connecting plate (225) is symmetrically provided with a sliding rod (226), and the outer upper part of the two sliding rods (226) is slidably provided with a positioning frame (227), and the positioning frame (227) is fixedly connected with the movable seat (215), and the top of the two sliding rods (226) is fixedly installed with an arc-shaped plate (228), and the top of the arc-shaped plate (228) is fixedly installed with a plurality of rack gears (229), and the upper part of one side of the movable seat (215) is rotatably connected with a rotating seat (230), and the other three-jaw chuck (103) is fixedly connected with the rotating seat (230), and the outer part of the rotating seat (230) is fixedly installed with a limiting gear ring (231).

8. The precision detection device for a planetary roller screw pair according to claim 1, characterized in that: The limiting assembly (3) comprises two groups of mounting rods (301) symmetrically installed on the upper parts of the two sides of the moving frame (201), and the outer side of each of the two mounting rods (301) is sleeved with an expansion spring (302), and the ends of the two mounting rods (301) away from the moving frame (201) are fixedly installed with a connecting strip (303), and the outer part of the two mounting rods (301) is slidably connected with a limiting plate (304) on one side of the expansion spring (302), and the two ends of the expansion spring (302) are fixedly connected with the limiting plate (304) and the moving frame (201).

9. The precision detection device for a planetary roller screw pair according to claim 8, characterized in that: One side of the rotating disc (203) is symmetrically provided with an L-shaped rod (305), one side of the limiting plate (304) is provided with a limiting hole (306), and the outer side of the L-shaped rod (305) is fixedly provided with a circular plate (307), and the circular plate (307) is in abutment with the limiting plate (304), and the telescopic spring (302) is in a stretched state.

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