Geometric parameter measuring device for crossed roller guide rail

Abstract

A geometric parameter measuring device for a crossed roller guide rail comprises a working platform, the working platform is connected with a rotating device and a measuring device, the rotating device is connected with a clamp device, the clamp device is used for clamping the measured crossed roller guide rail, and the measuring device is used for detecting the measured crossed roller guide rail. The device adopts the laser displacement sensor to realize non-contact measurement, can quickly detect geometric parameters of the cross roller guide rail profile, is easy to realize batch detection, and has the advantages of simple structure, quick measurement, high measurement precision and the like.

Description

Technical Field

[0001] This utility model relates to the field of precision parts testing equipment, and in particular to a device for measuring the geometric parameters of crossed roller guides. Background Technology

[0002] Crossed roller guides are characterized by high precision, high rigidity, and high-speed performance, significantly improving the machining accuracy and production efficiency of CNC machine tools. Particularly in precision machining centers, CNC milling machines, and CNC lathes, the application of crossed roller guides can greatly enhance machining accuracy and stability, ensuring the quality of machined parts. The geometric parameters of the crossed roller guide profile affect its precision and rigidity, and whether these parameters meet requirements determines whether the crossed roller guide can be applied in fields such as semiconductor equipment, industrial robots, medical equipment, and aerospace.

[0003] Currently, various cross roller guide series have been developed on the market, attracting widespread attention and research from many industrial and research institutions. However, due to the large number of measurement elements and high precision requirements of this guide, it is difficult to obtain measurement results from a single test of these numerous elements and to achieve batch testing. Therefore, it is necessary to research a device that can quickly detect the geometric parameters of the cross roller guide profile to solve this problem. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the purpose of this utility model is to provide a cross roller guide geometric parameter measuring device, which adopts the laser displacement sensor triangulation method to achieve non-contact measurement, can quickly detect the geometric parameters of the cross roller guide surface, and is easy to achieve batch testing. It has the advantages of simple structure, rapid measurement, and high measurement accuracy.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A geometric parameter measuring device for a cross roller guide includes a working platform 1, a rotary device 2 and a measuring device 4 connected to the working platform 1, a clamping device 3 connected to the rotary device 2, the clamping device 3 being used to clamp the cross roller guide to be measured, and the measuring device 4 being used to detect the cross roller guide to be measured.

[0007] The rotary device 2 includes a housing 5, which is connected to the working platform 1. The reduction transmission device inside the housing 5 includes a worm gear 11, the input end of which extends out of the housing 5 and is connected to a large gear 10. The large gear 10 meshes with a small gear 9, and the small gear 9 is connected to the output shaft of a reduction motor 6. The reduction motor 6 is fixed on the housing 5. The worm gear 11 meshes with a worm wheel 12, which is connected to the lower end of the lower half of the turntable 13. The middle part of the lower half of the turntable 13 is connected to the housing 5 via a turntable bearing 29, and the upper part of the lower half of the turntable 13 is connected to the upper part of the turntable 14.

[0008] The rotary table bearing 29 is a YRT150 series, and the material is carbon steel.

[0009] The lower half of the turntable 13 is designed according to the inner and outer diameters of the turntable bearing 29. The turntable bearing 29 has many mounting holes. Holes are drilled in the cylinder in the middle of the lower half of the turntable 13 to install the lower half of the turntable 13 and the turntable bearing 29 together, so that the turntable bearing 29 and the lower half of the turntable 13 can rotate together.

[0010] The clamping device 3 includes a positioning device and a clamping device. The positioning device adopts double-center positioning, including upper and lower turntable centers 23 and positioning blocks 25. The lower turntable center 23 is connected to the upper part 14 of the turntable, and the upper turntable center 23 is connected to the disc 22 that performs lifting and lowering movements. The lower positioning block 25 is mounted on the upper part 14 of the turntable and fixed by a positioning copper post 24, which is connected to the upper part 14 of the turntable. The upper positioning block 25 is mounted on the disc 22 and fixed by a positioning copper post 24, which is connected to the disc 22. The two positioning blocks 25 drive the cross roller guide 26 to rotate together. The turntable center 23 ensures coaxiality and clamping, and the positioning blocks 25 ensure installation accuracy.

[0011] The turntable tip 23 is designed in a stepped shape to prevent the measured guide rail from deforming during the measurement process; the positioning block 25 is designed as a three-quarter circle with a notch at a 90° vertical plane.

[0012] The clamping device includes a lifting gear 16, which is fixed on the upper part 14 of the turntable. The lifting gear 16 meshes with a rack 19. An auxiliary housing 18 is provided on the outside of the rack 19. A guide rail is provided inside the auxiliary housing 18, which cooperates with the rack 19 to play a guiding role. The auxiliary housing 18 is installed on the upper part 14 of the turntable. The upper part of the rack 19 is connected to the disc 22 through a connecting plate 1 20 and a connecting plate 21. The rack 19 drives the entire disc 22 to achieve the up and down lifting action.

[0013] The gear support 15 of the lifting gear 16 is provided with a locking mechanism 17. The lifting gear 16 is manually driven and the locking mechanism 17 completes the locking action.

[0014] An optical axis 27 is connected to the upper half 14 of the turntable, and the optical axis 27 passes through a through hole on the disc 22.

[0015] The measuring device 4 includes a Z-axis motion mechanism and an X-axis motion mechanism. The Z-axis motion mechanism includes a Z-axis column 39, the lower end of which is fixedly connected to the working platform 1. The upper end of the Z-axis column 39 is connected to a Z-axis motor 31. The output shaft of the Z-axis motor 31 is connected to one end of a ball screw 34. A screw nut 36 is installed on the ball screw 34. A boss 38 is installed on the screw nut 36 and connected to one end of a lifting platform 46. The X-axis motion mechanism is installed on the lifting platform 46. The ball screw 34 and the auxiliary guide device work together to control the lifting of the X-axis motion mechanism.

[0016] The auxiliary guiding device includes a support 41 connected to the working platform 1, an auxiliary column 42 installed above the support 41, a linear guide rail 43 installed on the auxiliary column 42, a slider 44 installed on the linear guide rail 43, and the slider 44 is connected to the other end of the lifting platform 46; a placement platform 40 is provided between the auxiliary column 42 and the Z-axis column 39.

[0017] The two ends of the ball screw 34 are fixed on the bearing housing 35, and the bearing housing 35 is arranged on the Z-axis column 39.

[0018] A limit block 45 must be arranged at the upper end of the auxiliary column 42.

[0019] The X-axis motion mechanism includes an X-axis motor 49, which is fixed on the lifting platform 46. The output shaft of the X-axis motor 49 is connected to one end of a ball screw 53. A screw nut 52 is installed on the ball screw 53, and a laser displacement sensor 48 is connected to the screw nut 52.

[0020] The ball screw 53 has bearing seats 54 at both ends and symmetrical guide rails 55 on both sides.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] This invention employs a laser displacement sensor as the optical measuring element, based on the triangulation method. An optical lens emits a beam of visible light onto the surface of the object being measured. This beam passes through the surface and is captured by a built-in CCD linear camera at specific intervals. The collected data is then processed by a computer to obtain the desired geometric error. This method offers advantages such as simple structure, non-contact measurement, rapid measurement, and high accuracy, effectively solving the problems associated with existing measurement methods.

[0023] This invention employs a gear and rack mechanism to clamp the guide rail under test, achieving lifting and clamping action. Rotating centers are arranged on both sides to ensure the rotational accuracy of the guide rail under test. Most importantly, to ensure batch testing and improve clamping efficiency, positioning blocks are installed on both sides to enable rapid clamping of the guide rail under test, thereby improving work efficiency. At the same time, the lifting does not require motor control, greatly reducing manufacturing costs.

[0024] This invention employs a gear and rack mechanism to achieve lifting and clamping of the guide rail under test. The height is adjustable, and the device can measure the geometric error of cross roller guide rails of different models and lengths, thereby improving its applicability. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0026] Figure 2 This is a schematic diagram of the rotating device and clamping device in an embodiment of the present utility model.

[0027] Figure 3 This is a schematic diagram of the measuring device according to an embodiment of the present invention.

[0028] Figure 4 This is a cross-sectional view of the measuring device AA according to an embodiment of the present invention.

[0029] Figure 5 Cross-sectional view of the measuring device BB in an embodiment of this utility model.

[0030] The components include: 1. Working platform; 2. Rotary device; 3. Clamping device; 4. Measuring device; 5. Housing; 6. Gear motor; 7. Motor bracket; 8. Coupling I; 9. Pinion; 10. Gear; 11. Worm; 12. Worm wheel; 13. Lower half of turntable; 14. Upper half of turntable; 15. Gear support; 16. Lifting gear; 17. Locking mechanism; 18. Auxiliary housing; 19. Rack; 20. Connecting plate I; 21. Connecting plate II; 22. Disc; 23. Turntable center; 24. Positioning copper column; 25. Positioning block; 26. Measured cross roller guide; 27. Optical shaft; 28. Flange; 29. ​​Turntable. Bearings, 30 Bearing housing 1, 31 Z-axis motor, 32 Z-axis motor bracket, 33 Coupling 2, 34 Ball screw 1, 35 Bearing housing 2, 36 Screw nut 1, 37 Z-axis housing, 38 Boss, 39 Z-axis column, 40 Placement platform, 41 Support, 42 Column, 43 Linear guide, 44 Slider, 45 Limit block, 46 Lifting platform, 47 Sensor bracket, 48 Laser displacement sensor, 49 X-axis motor, 50 X-axis motor bracket, 51 Coupling 3, 52 Screw nut 2, 53 Ball screw 2, 54 Bearing housing 3, 55 Guide rail. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings.

[0032] Reference Figure 1 A cross roller guide geometric parameter measuring device includes a working platform 1, a rotating device 2, a clamping device 3, and a measuring device 4. The rotating device 2 and the measuring device 4 are connected to the working platform 1. The working platform 1 serves as the mounting base for the rotating device 2 and the measuring device 4, and bears the weight of the entire cross roller guide geometric parameter measuring device. Therefore, it is made of granite. The clamping device 3 is connected to the rotating device 2. The clamping device 3 is used to clamp the cross roller guide 26 to be measured. The measuring device 4 is used to detect the cross roller guide 26 to be measured. The various components of the device cooperate with each other to measure the geometric parameters of the cross roller guide.

[0033] Reference Figure 1 , Figure 2 The rotary device 2 includes a housing 5, a geared motor 6, a motor bracket 7, a coupling 8, a pinion 9, a gear 10, a worm gear 11, a worm wheel 12, a lower half of the turntable 13, an upper half of the turntable 14, a turntable bearing 29, and a bearing seat 30. The housing 5 is an important part of the rotary device 2. The housing 5 is bolted to the working platform 1. Its design ensures the correct installation position of the entire rotary device 2, and at the same time, it seals and prevents dust from entering the internal reduction transmission device, thereby ensuring the transmission between them. The reduction transmission device includes a worm gear 11 mounted on a bearing seat 30. Each end of the worm gear 11 is equipped with a bearing seat 30. The worm gear 11 is positioned by a shaft shoulder, and the installation position of the bearing seat 30 is determined by pre-calculation and measurement. The input end extends out of the housing 5 and is connected to the large gear 10 via a key to improve transmission efficiency. The large gear 10 meshes with the small gear 9, which is connected to the output end of the coupling 8. The input end of the coupling 8 is connected to the output shaft of the geared motor 6. The geared motor 6 is fixed to the housing 5 via the motor bracket 7. The geared motor 6 drives the small gear 9 to mesh with the large gear 10 through the coupling 8 to achieve speed reduction first. Then, the large gear 10 drives the worm 11 to rotate. The worm 11 meshes with the worm wheel 12 to achieve two-stage speed reduction. The worm wheel 12 is connected to the lower end of the lower half of the turntable 13. The middle part of the lower half of the turntable 13 is connected to the housing 5 via the turntable bearing 29. The upper part of the lower half of the turntable 13 is connected to the upper part of the turntable 14. The lower half of the turntable 13 and the upper part of the turntable 14 form the turntable.

[0034] The lower half of the turntable 13 is designed according to the inner and outer diameters of the turntable bearing 29. The turntable bearing 29 has many mounting holes. Holes are drilled in the cylinder in the middle of the lower half of the turntable 13 to install the lower half of the turntable 13 and the turntable bearing 29 together, so that the turntable bearing 29 and the lower half of the turntable 13 can rotate together.

[0035] Reference Figure 1 , Figure 2The clamping device 3 includes a positioning device and a clamping device. The positioning device adopts double-center positioning, including upper and lower turntable centers 23 and positioning blocks 25. The lower turntable center 23 is connected to the upper part 14 of the turntable, and the upper turntable center 23 is connected to the disc 22 that performs lifting and lowering movements. The lower positioning block 25 is mounted on the upper part 14 of the turntable and fixed by a positioning copper post 24, which is connected to the upper part 14 of the turntable. The upper positioning block 25 is mounted on the disc 22 and fixed by a positioning copper post 24, which is connected to the disc 22. The two positioning blocks 25 drive the cross roller guide 26 under test to rotate together. The turntable center 23 ensures coaxiality and clamping, and the positioning blocks 25 ensure installation accuracy and drive the guide rail to rotate. The efficiency is very high, which greatly reduces the time required for clamping and clamping, and is very suitable for batch testing.

[0036] The turntable tip 23 is designed in a stepped shape, which can reduce the stress on it and further prevent the deformation of the guide rail under test during the measurement process, thereby reducing the detection error. The positioning block 25 is designed as a three-quarter circle with a notch that is an ideal 90° vertical plane.

[0037] The clamping device is mainly achieved through gear and rack transmission, including a lifting gear 16, which is fixed to the upper part 14 of the turntable via a gear support 15. The lifting gear 16 meshes with a rack 19, which is a non-standard part. The back of the rack 19 is designed to mate with a guide rail. For the gear and rack mechanism, the gear and rack only play a transmission role and do not have a guiding role, nor can they directly complete the lifting action. Therefore, an auxiliary housing 18 needs to be designed. The auxiliary housing 18 contains a guide rail that mates with the guide rail designed on the back of the rack 19. The interaction between the track phases serves as a guide, and the auxiliary housing 18 is installed on the upper part 14 of the turntable. The upper part of the rack 19 is connected to the disc 22 through connecting plate 1 20 and connecting plate 21. The rack 19 drives the entire disc 22 to move up and down. However, the whole must be equipped with a guide support device. In this device, two optical shafts 27 are designed as guide devices. The optical shafts 27 are mainly positioned and installed on the upper part 14 of the turntable through flange 28. The disc 22 is made into a through hole so that the optical shafts 27 can pass through. It is simple, efficient, practical and reliable.

[0038] The lifting gear 16 is manually driven and cannot achieve self-locking. Therefore, a locking mechanism 17 is designed and installed on the gear support 15 of the lifting gear 16. This locking mechanism 17 ensures that the cross roller guide 26 being measured is not subjected to excessive pressure when the disc 22 is not clamped, greatly reducing the deformation of the cross roller guide 26, improving measurement accuracy, and preventing wear. When lifting, the locking mechanism 17 is released to rotate the lifting gear 16. When not lifting, the locking mechanism 17 is simply fixed to complete the locking action.

[0039] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5 The measuring device 4 includes a Z-axis motion mechanism and an X-axis motion mechanism. The Z-axis motion mechanism includes a Z-axis column 39, the lower end of which is fixedly connected to the work platform 1. A Z-axis housing 37 is installed on the outside of the Z-axis column 39 to protect the internal structure. A Z-axis motor bracket 32 ​​is connected to the upper end of the Z-axis column 39 to fix the Z-axis motor 31. The output shaft of the Z-axis motor 31 is connected to one end of a ball screw 34 via a coupling 2 33. A screw nut 36 is installed on the ball screw 34. The screw nut 36 moves along the ball screw... The ball screw 34 moves up or down to complete the Z-axis movement. A boss 38 is mounted on the ball screw nut 36 and connected to one end of the lifting platform 46. The lifting platform 46 is equipped with the X-axis mechanism. The ball screw nut 36 is used to control the lifting of the X-axis mechanism. The two ends of the ball screw 34 are fixed on the bearing housing 35, which is arranged on the Z-axis column 39. The ball screw 34 alone cannot stably drive the X-axis mechanism to lift and lower. Therefore, an auxiliary guide device is designed. The ball screw 34 and the auxiliary guide device work together to control the lifting of the X-axis mechanism.

[0040] The auxiliary guiding device assists the ball screw 34 in its Z-axis reciprocating motion. It includes a support 41 connected to the work platform 1 at the bottom, which is cast. An auxiliary column 42, made of cold-rolled steel plate, is mounted above the support 41. Holes are drilled in the auxiliary column 42 for mounting a linear guide rail 43. A slider 44 is mounted on the linear guide rail 43 and connected to the other end of the lifting platform 46. A limit block 45 must be placed at the upper end of the auxiliary column 42. A placement platform 40 is provided between the auxiliary column 42 and the Z-axis column 39. When not in operation, the ball screw 34 cannot self-lock; in this case, the entire lifting platform 46 can be stopped on the placement platform 40. The limit block 45 ensures the slider's travel. The same limit block is also needed to ensure the travel distance when moving in the X-axis direction.

[0041] The X-axis motion mechanism is mainly responsible for adjusting the laser displacement sensor 48 to a suitable position to ensure higher accuracy. Its overall structure is similar to that of the Z-axis motion mechanism, both using ball screw transmission. It includes an X-axis motor 49, which is fixed to the lifting platform 46 via an X-axis motor bracket 50. The output shaft of the X-axis motor 49 is connected to one end of a ball screw 53 via a coupling 3 51. A screw nut 2 52 is installed on the ball screw 2 53. To ensure higher motion accuracy, bearing seats 3 54 are arranged at both ends of the ball screw 2 53 to ensure the screw engagement accuracy. Symmetrical guide rails 55 are arranged on both sides, which are the X-axis auxiliary guide mechanisms. Because this transmission mechanism does not need to provide much force, it only needs to drive a laser displacement sensor 48 to perform forward and backward reciprocating linear motion, so a set screw connection is used. The laser displacement sensor 48 is fixed to the screw nut 2 52 via a sensor bracket 47.

[0042] The working principle of this utility model is as follows:

[0043] Before measurement begins, the cross roller guide 26 to be measured is fixed by a clamping device. First, the lower end of the cross roller guide 26 to be measured is placed on the top 23 of the turntable on the upper half of the turntable 14. The right-angled edge of the cross roller guide 26 to be measured is pressed against the right-angled notch of the positioning block 25 for fixation. Then, the lifting gear 16 is driven to drive the rack 19, so that the top 23 of the turntable on the disc 22 acts on the upper end of the cross roller guide 26 to be measured, and the right-angled notch of the positioning block 25 on the disc 22 is locked onto the right-angled edge of the cross roller guide 26 to be measured. After the fixation is completed, the position of the disc 22 is fixed by the locking mechanism 17 to completely fix the cross roller guide to be measured.

[0044] Subsequently, the measuring device 4, through the cooperation of the Z-axis and X-axis mechanisms, adjusts the laser displacement sensor 48 to an appropriate position. During detection, the X-axis motor 49 first drives the sensor to a close-range detection position. Then, when detecting straightness, the X-axis mechanism remains stationary while the Z-axis motor 31 moves the sensor in the Z-axis direction to obtain straightness data. When detecting the angle error of the V-shaped guide rail surface, neither axis moves. The cross roller guide rail 26 under test can obtain detection data as the turntable rotates. The reduction motor 6 drives the small gear 9 to mesh with the large gear 10 to achieve speed reduction transmission. The large gear 10 then drives the worm 11 to rotate, and the worm 11 and worm wheel 12 achieve two-stage speed reduction transmission. The worm wheel 12 drives the upper half of the turntable 14 to rotate via the lower half 13 of the turntable. Finally, the obtained data is processed to obtain the error to be detected for the cross roller guide rail 26 under test. The measurement principle is triangulation, which uses an optical lens to emit a beam of visible light onto the surface of the object being measured. After passing through the surface of the object, the beam passes through a light receiver lens and is collected by a built-in CCD linear camera at certain intervals. The collected data is then processed by a computer to obtain the required geometric error.

[0045] In summary, the cross roller guide geometric parameter measuring device of this utility model has good accuracy, can effectively reduce the error in measuring the geometric parameters of cross roller guides, and can better complete the detection of geometric parameters of different models of cross roller guides, achieving high-precision, fast and effective measurement. Furthermore, this device has a simple structure, is easy to assemble, highly adaptable, and simple and quick to operate.

Claims

1. A device for measuring the geometric parameters of a crossed roller guide, comprising a working platform (1), characterized in that: The work platform (1) is connected to a rotary device (2) and a measuring device (4). The rotary device (2) is connected to a clamping device (3). The clamping device (3) is used to clamp the cross roller guide rail to be measured. The measuring device (4) is used to detect the cross roller guide rail to be measured. The measuring device (4) includes a Z-axis mechanism and an X-axis mechanism. The Z-axis mechanism includes a Z-axis column (39), the lower end of which is fixedly connected to the working platform (1), and the upper end of which is connected to a Z-axis motor (31). The output shaft of the Z-axis motor (31) is connected to one end of a ball screw (34). A screw nut (36) is installed on the ball screw (34). A boss (38) is installed on the screw nut (36) and connected to one end of a lifting platform (46). An X-axis mechanism is installed on the lifting platform (46). The ball screw (34) and the auxiliary guide device work together to control the lifting of the X-axis mechanism.

2. The geometric parameter measuring device for a crossed roller guide according to claim 1, characterized in that: The rotary device (2) includes a housing (5), which is connected to the working platform (1). The reduction transmission device inside the housing (5) includes a worm (11). The input end of the worm (11) extends out of the housing (5) and is connected to the large gear (10). The large gear (10) meshes with the small gear (9). The small gear (9) is connected to the output shaft of the reduction motor (6). The reduction motor (6) is fixed on the housing (5). The worm (11) meshes with the worm wheel (12). The worm wheel (12) is connected to the lower end of the lower half of the turntable (13). The middle part of the lower half of the turntable (13) is connected to the housing (5) via the turntable bearing (29). The upper part of the lower half of the turntable (13) is connected to the upper half of the turntable (14).

3. The geometric parameter measuring device for a crossed roller guide according to claim 1, characterized in that: The clamping device (3) includes a positioning device and a clamping device; the positioning device includes a turntable tip (23) and a positioning block (25) at the top and bottom. The lower turntable tip (23) is connected to the upper half of the turntable (14), and the upper turntable tip (23) is connected to the disc (22) that is moving up and down; the lower positioning block (25) is mounted on the upper half of the turntable (14); the upper positioning block (25) is mounted on the disc (22); the two positioning blocks (25) drive the cross roller guide (26) to be measured to rotate together.

4. The geometric parameter measuring device for a crossed roller guide according to claim 3, characterized in that: The turntable tip (23) is designed in a stepped shape to prevent the measured guide rail from deforming during the measurement process; the positioning block (25) is designed as a three-quarter circle with a notch at a 90° vertical plane.

5. The geometric parameter measuring device for a crossed roller guide according to claim 3, characterized in that: The clamping device includes a lifting gear (16), which is fixed on the upper half of the turntable (14). The lifting gear (16) meshes with the rack (19). The rack (19) is provided with an auxiliary shell (18) on the outside. The auxiliary shell (18) has a guide rail inside, which cooperates with the rack (19) to play a guiding role. The auxiliary shell (18) is installed on the upper half of the turntable (14). The upper part of the rack (19) is connected to the disc (22) through a connecting plate one (20) and a connecting plate two (21). The rack (19) drives the disc (22) to achieve the up and down lifting action.

6. The geometric parameter measuring device for a crossed roller guide according to claim 5, characterized in that: The gear support (15) of the lifting gear (16) is provided with a locking mechanism (17). The lifting gear (16) is manually driven and the locking mechanism (17) completes the locking action.

7. The geometric parameter measuring device for a crossed roller guide according to claim 1, characterized in that: The auxiliary guiding device includes a support (41) connected to the working platform (1), an auxiliary column (42) installed above the support (41), a linear guide rail (43) installed on the auxiliary column (42), a slider (44) installed on the linear guide rail (43), and the slider (44) connected to the other end of the lifting platform (46); a placement platform (40) is provided between the auxiliary column (42) and the Z-axis column (39).

8. The geometric parameter measuring device for a crossed roller guide according to claim 7, characterized in that: The first ball screw (34) is fixed at both ends on the second bearing seat (35), and the second bearing seat (35) is arranged on the Z-axis column (39); the upper end of the auxiliary column (42) is provided with a limit block (45).

9. The geometric parameter measuring device for a crossed roller guide according to claim 1, characterized in that: The X-axis motion mechanism includes an X-axis motor (49), which is fixed on a lifting platform (46). The output shaft of the X-axis motor (49) is connected to one end of a ball screw (53). A screw nut (52) is installed on the ball screw (53), and a laser displacement sensor (48) is connected to the screw nut (52).

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