Clearance measuring device for ball screw

Abstract

The invention provides a clearance measuring device for a ball screw, and the device comprises a substrate, one end of the substrate is provided with a supporting plate, and the supporting plate is in sliding connection with the substrate through a first sliding rail; the workpiece fixing structure comprises a locking assembly and a clamping mechanism, the locking assembly is arranged on the base plate, the clamping mechanism is arranged on the first sliding rail in a sliding mode, the clamping mechanism comprises a four-direction floating mechanism and a chuck clamping device, and the four-direction floating mechanism is connected with the chuck clamping device; the thrust mechanism is arranged on the first sliding rail, and the thrust mechanism is connected with the four-way floating mechanism; the measuring mechanism is arranged on the base plate, and the measuring mechanism is connected with the locking assembly. According to the clearance measuring device for the ball screw, a floating clamping method is adopted, axial force and the screw are completely overlapped, radial force errors are eliminated, and then high measuring precision is obtained.

Description

Technical Field

[0001] The present invention relates to the field of clearance measuring devices, and in particular to a clearance measuring device for a ball screw. Background Art

[0002] A typical ball screw pair consists of a screw, a nut and a steel ball. The ball screw pair is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotary motion into linear motion, or torque into axial repetitive force. It has the advantages of high precision, reversibility and high efficiency. The ball screw is a high-precision transmission element. In the production and processing process, in order to ensure quality, it is necessary to measure the clearance of the ball screw.

[0003] Usually, the clearance of ball screws is measured by fixing the ball screws through a clamping structure, applying external force to the ball screws, and using a measuring device to measure the relative displacement of the ball screws in the axial direction to obtain the axial clearance of the ball screws. However, the axial force and radial force generated during the clamping process of the ball screws will cause errors in the measurement results, making it impossible to obtain accurate clearance. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a clearance measuring device for a ball screw.

[0005] The present invention aims to provide a clearance measuring device for a ball screw, which adopts a floating clamping method to eliminate radial force errors, thereby obtaining higher measurement accuracy.

[0006] In one embodiment of the present invention, a clearance measuring device for a ball screw includes a base plate, one end of the base plate is provided with a support plate, and the support plate is slidably connected to the base plate through a first slide rail; a workpiece fixing structure, the workpiece fixing structure includes a locking assembly and a clamping mechanism, the locking assembly is arranged on the base plate, the clamping mechanism is slidably arranged on the first slide rail, the clamping mechanism includes a four-way floating mechanism and a chuck clamping device, the four-way floating mechanism is connected to the chuck clamping device; a thrust mechanism, the thrust mechanism is arranged on the first slide rail, and the thrust mechanism is connected to the four-way floating mechanism; a measuring mechanism, the measuring mechanism is arranged on the base plate, and the measuring mechanism is connected to the locking assembly.

[0007] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: the base plate is used to place the workpiece fixing structure, the thrust structure and the measuring mechanism; the first slide rail facilitates the sliding of the four-way floating mechanism to measure the clearance of ball screws of different lengths; the thrust mechanism is used to drive the movement of the four-way floating mechanism; the locking assembly is used to tighten the ball screw, and the chuck clamping device is used to clamp the ball screw to avoid the movement of the screw during the measurement of the clearance of the ball screw and cause measurement errors; wherein, the function of the four-way floating mechanism is to float and clamp the ball screw, so that the axial force completely overlaps with the screw to eliminate the radial force error, thereby improving the measurement accuracy; the measuring mechanism is used to measure the clearance value of the ball screw. In summary, this technical solution adopts the method of clamping the four-way floating mechanism to make the axial force completely overlap with the screw to eliminate the radial force error, thereby obtaining a higher measurement accuracy.

[0008] In one embodiment of the present invention, the four-way floating mechanism includes: a support seat, the support seat is arranged on the support plate, and the first side wall of the support seat is provided with a support plate; a first motor, the first motor is arranged at one end of the second side wall of the support seat; a Y guide block, one end surface of the Y guide block is connected to one end surface of the support seat; an X guide block, one end surface of the X guide block is connected to the other end surface of the Y guide block; a first connecting plate, one end surface of the first connecting plate is connected to the other end surface of the X guide block.

[0009] Compared with the prior art, the technical effect achieved by adopting the technical solution is as follows: the support seat is used to place the first motor and the chuck clamping mechanism; the first motor is used to drive the floating of the X guide block and the Y guide block; the function of the X guide block and the Y guide block is that during the clamping process, the X guide block floats along the X axis, and the Y guide block floats along the Y axis, so that the axial force of clamping the ball screw completely coincides with the ball screw, thereby improving the measurement accuracy.

[0010] In one embodiment of the present invention, the chuck clamping device comprises: a connecting block, one end surface of the connecting block is connected to the other end surface of the first connecting plate; and a clamping chuck, which is arranged on the other end surface of the connecting block.

[0011] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the connecting block is used to connect the clamping chuck with the X guide block; the clamping chuck is used to clamp the ball screw.

[0012] In one embodiment of the present invention, the locking assembly includes: a nut locking device, which is arranged on the base plate through a second slide rail; and a screw locking device, which is arranged on the base plate.

[0013] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the nut locking device is used to tighten the nut of the ball screw, and the screw locking device is used to tighten the screw of the ball screw.

[0014] In one embodiment of the present invention, the nut locking device includes: a slider, the bottom of the slider is slidably arranged on the base plate through a second slide rail, and the slider is provided with a first groove; a second motor, the second motor is installed and fixed on the first groove; a limit block, the limit block is arranged on the base plate through the second slide rail, a fixing device is provided at one end of the limit block away from the slider, the limit block is connected to the second motor through the fixing device, a nut clamping part is provided in the middle of the limit block, the nut clamping part includes a second groove and a first clamping pad, one end surface of the first clamping pad is connected to the inner side wall of the second groove, and the other end surface of the first clamping pad is clamped against the side wall of the nut.

[0015] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the slider is used to place the second motor, the slider is arranged on the second slide rail, the limit block is connected to the second motor through a fixing device, the second motor is used to drive the movement of the limit block, the nut clamping part is used to clamp the nut, the second groove is used to place the nut of the ball screw, the first clamping pad is clamped against the side wall of the nut to tighten the nut, thereby avoiding measurement errors caused by loose fixation of the nut during the clearance measurement process.

[0016] In one embodiment of the present invention, the screw locking device includes: a clamping block, the clamping block includes a third groove and a second clamping pad, one end surface of the second clamping pad is connected to the inner wall of the third groove, and the other end surface of the second clamping pad is clamped against the side wall of the nut.

[0017] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the clamping block is used to clamp the screw rod, the third groove is used to place the screw rod of the ball screw, and the second clamping pad is clamped against the side wall of the screw rod to tighten the screw rod, thereby avoiding measurement errors caused by loose fixation of the screw rod during the clearance measurement process.

[0018] In one embodiment of the present invention, the thrust mechanism includes: a supporting device, the supporting device includes a base plate, a pillar and a side plate, the base plate is arranged on the base plate, the pillar is fixed to one end surface of the base plate through a fixing block, one end surface of the pillar is connected to the side wall of the first end of the side plate, and one end surface of the base plate is provided with a supporting block; a force sensor, the force sensor is arranged on the supporting block, one end surface of the force sensor is connected to one end surface of the pillar; a buffer spring, the buffer spring is arranged on the pillar; a second connecting plate, one end side wall of the second connecting plate is connected to the second end side wall of the side plate; a servo module, the servo module is connected to the second connecting plate.

[0019] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the base plate is used to place force sensors, pillars and side plates, the force sensor is used to accurately obtain the axial force generated when clamping the ball screw, the servo module is used to drive the movement of the base plate on the first slide rail, and the buffer spring is used to buffer the impact force generated when the base plate moves along the first slide rail. In summary, by driving the movement of the base plate through the servo module, the force sensor can obtain the axial force generated in the process of clamping ball screws of different lengths, and the setting of the buffer spring buffers the impact force of the pillar on the force sensor during the movement of the base plate to reduce the impact on the force sensor.

[0020] In one embodiment of the present invention, the servo module includes: a third slide rail, which is arranged on the base plate; a sliding chain, which is slidably installed on the third slide rail, and one end of the sliding chain is connected to the second end side wall of the second connecting plate.

[0021] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: the sliding chain is connected to the second connecting plate, the sliding chain moves along the third slide rail, the movement of the sliding chain drives the movement of the second connecting plate, and then drives the movement of the base plate, so that the force sensor starts working and accurately obtains the axial force generated by the workpiece fixing structure when clamping the ball screw, thereby obtaining higher measurement accuracy.

[0022] In one embodiment of the present invention, the measuring mechanism includes: a displacement sensor; and a servo motor, wherein the output end of the servo motor is connected to the displacement sensor.

[0023] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: the servo motor is used to drive the displacement sensor, the function of the floating probe is to contact the ball screw and transmit the position signal of the ball screw to the displacement sensor before and after the ball screw generates relative displacement through thrust, and the displacement sensor is used to measure and display the relative displacement value of the ball screw in the axial direction.

[0024] In one embodiment of the present invention, the end portion of the floating probe contacting the ball screw is tapered.

[0025] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by setting the end of the floating probe that contacts the ball screw to a cone, the contact area between the floating probe and the side wall of the ball screw is reduced, so that the floating probe can be compatible with ball screws of various diameters.

[0026] After adopting the technical solution of the present invention, the following effects can be achieved: (1) The clearance measuring device for a ball screw of the present invention comprises a base plate for placing a workpiece fixing structure, a thrust structure and a measuring mechanism; the first slide rail facilitates the sliding of the four-way floating mechanism to measure the clearance of ball screws of different lengths; the thrust mechanism is used to drive the movement of the four-way floating mechanism; the locking assembly is used to tighten the ball screw, and the chuck clamping mechanism is used to clamp the ball screw to avoid the movement of the screw during the measurement of the clearance of the ball screw, thereby causing a measurement error; wherein the function of the four-way floating mechanism is to float and clamp the ball screw, so that the axial force completely overlaps with the screw to eliminate the radial force error, thereby improving the measurement accuracy; the measuring mechanism is used to measure the clearance value of the ball screw. In summary, the present technical solution adopts the method of clamping the four-way floating mechanism to make the axial force completely overlap with the screw to eliminate the radial force error, thereby obtaining a higher measurement accuracy.

[0027] (2) The clearance measuring device for a ball screw of the present invention is provided with an X guide block and a Y guide block at one end of a chuck clamping device. A first motor drives the X guide block to float along the X-axis direction, and the Y guide block to float along the Y-axis direction, so that the axial force generated by the clamping chuck during the clamping process completely coincides with the screw, thereby eliminating the radial force, thereby obtaining a higher measurement accuracy.

[0028] (3) The clearance measuring device for a ball screw of the present invention is configured to have a conical end portion of the floating probe that contacts the ball screw, thereby reducing the contact area between the floating probe and the side wall of the ball screw, so that the floating probe is compatible with ball screws of various diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a clearance measuring device for a ball screw of the present invention; Description of reference numerals: 100, substrate; 110, support plate; 120, first slide rail; 230, four-way floating mechanism; 233, first motor; 236, first connecting plate; 241, connecting block; 242, clamping chuck; 251, slider; 254, second motor; 256, fixing device; 259, first clamping pad; 261, clamping block; 263, second clamping pad; 311, bottom plate; 312, support column; 313, side plate; 320, force sensor; 330, buffer spring; 340, second connecting plate; 410, displacement sensor; 420, servo motor. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1The present embodiment provides a clearance measuring device for a ball screw, including a base plate 100, a support plate 110 is provided at one end of the base plate 100, and the support plate 110 is slidably connected to the base plate 100 through a first slide rail 120; a workpiece fixing structure, the workpiece fixing structure includes a locking assembly and a clamping mechanism, the locking assembly is arranged on the base plate 100, the clamping mechanism is slidably arranged on the first slide rail 120, the clamping mechanism includes a four-way floating mechanism 230 and a chuck clamping device, and the four-way floating mechanism 230 is connected to the chuck clamping device; a thrust mechanism, the thrust mechanism is arranged on the first slide rail 120, and the thrust mechanism is connected to the four-way floating mechanism 230; a measuring mechanism, the measuring mechanism is arranged on the base plate 100, and the measuring mechanism is connected to the locking assembly.

[0032] It should be noted that the base plate 100 is used to place the workpiece fixing structure, the thrust structure and the measuring mechanism; the first slide rail 120 facilitates the sliding of the four-way floating mechanism 230 to measure the clearance of ball screws of different lengths; the thrust mechanism is used to drive the movement of the four-way floating mechanism 230; the locking assembly is used to tighten the ball screw, and the chuck clamping device is used to clamp the ball screw to avoid the movement of the screw during the measurement of the clearance of the ball screw and cause measurement errors; wherein, the function of the four-way floating mechanism 230 is to float and clamp the ball screw so that the axial force completely overlaps with the screw to eliminate the radial force error, thereby improving the measurement accuracy; the measuring mechanism is used to measure the clearance value of the ball screw. In summary, this technical solution adopts the clamping method of the four-way floating mechanism 230 to make the axial force completely overlap with the screw to eliminate the radial force error, thereby obtaining a higher measurement accuracy.

[0033] In a specific embodiment, the four-way floating mechanism 230 includes: a support seat, the support seat is arranged on the support plate 110, and the first side wall of the support seat is provided with a support plate; a first motor 233, the first motor 233 is arranged at one end of the second side wall of the support seat; a Y guide block, one end surface of the Y guide block is connected to one end surface of the support seat; an X guide block, one end surface of the X guide block is connected to the other end surface of the Y guide block; a first connecting plate 236, one end surface of the first connecting plate 236 is connected to the other end surface of the X guide block.

[0034] It should be noted that the support seat is used to place the first motor 233 and the chuck clamping device; the first motor 233 is used to drive the floating of the X guide block and the Y guide block; the function of the X guide block and the Y guide block is that during the clamping process, the X guide block floats along the X axis, and the Y guide block floats along the Y axis, so that the axial force of the clamping of the ball screw completely coincides with the ball screw, thereby improving the measurement accuracy.

[0035] In a specific embodiment, the chuck clamping mechanism () includes: the chuck clamping device includes: a connecting block 241, one end surface of the connecting block 241 is connected to the other end surface of the first connecting plate 236; a clamping chuck 242, and the clamping chuck 242 is arranged on the other end surface of the connecting block 241.

[0036] It should be noted that the connecting block 241 is used to connect the clamping chuck 242 to the X guide block; the clamping chuck 242 is used to clamp the ball screw.

[0037] In a specific embodiment, the locking assembly includes: a nut locking device, which is disposed on the base plate 100 through a second slide rail; and a screw locking device, which is disposed on the base plate 100 .

[0038] It should be noted that the nut locking device is used to tighten the nut of the ball screw, and the screw locking device is used to tighten the screw of the ball screw.

[0039] In a specific embodiment, the nut locking device includes: a slider 251, the bottom of the slider 251 is slidably disposed on the substrate 100 through a second slide rail, and the slider 251 is provided with a first groove; a second motor 254, the second motor 254 is installed and fixed on the first groove; a limit block, the limit block is disposed on the bottom plate 311 through the second slide rail, and a fixing device 256 is provided at the end of the limit block away from the slider 251, the limit block is connected to the second motor 254 through the fixing device 256, and a nut clamping part is provided in the middle of the limit block, the nut clamping part includes a second groove and a first clamping pad 259, one end surface of the first clamping pad 259 is connected to the inner side wall of the second groove, and the other end surface of the first clamping pad 259 is clamped against the side wall of the nut.

[0040] It should be noted that the slider 251 is used to place the second motor 254, the slider 251 is arranged on the second slide rail, the limit block is connected to the second motor 254 through the fixing device 256, the second motor 254 is used to drive the movement of the limit block, the nut clamping part is used to clamp the nut, the second groove is used to place the nut of the ball screw, and the first clamping pad 259 is clamped against the side wall of the nut to tighten the nut to avoid measurement errors caused by loose fixation of the nut during the clearance measurement process.

[0041] Preferably, the first clamping pad 259 is made of elastic material, such as rubber.

[0042] It should be noted that, by setting the first clamping pad 259, the impact force on the clamping block 261 generated when the ball screw moves relative to the ball screw is reduced, and the friction between the ball screw and the ball screw is increased, so that the clamping force on the ball screw is greater, thereby reducing the measurement error of the clearance of the ball screw.

[0043] In a specific embodiment, the screw locking device includes: a clamping block 261, the clamping block 261 includes a third groove and a second clamping pad 263, one end surface of the second clamping pad 263 is connected to the inner wall of the third groove, and the other end surface of the second clamping pad 263 is clamped against the side wall of the nut.

[0044] It should be noted that the clamping block 261 is used to clamp the screw, the third groove is used to place the screw of the ball screw, and the second clamping pad 263 is clamped against the side wall of the screw to tighten the screw to avoid measurement errors caused by loose fixation of the screw during the clearance measurement process.

[0045] Preferably, the second clamping pad 263 is made of elastic material, such as rubber.

[0046] It should be noted that, by setting the second clamping pad 263, the impact force on the clamping block 261 generated when the ball screw moves relative to the ball screw is reduced, and the friction between the ball screw and the ball screw is increased, so that the clamping force on the ball screw is stronger, thereby reducing the measurement error of the clearance of the ball screw.

[0047] In a specific embodiment, the thrust mechanism includes: a supporting device, the supporting device includes a bottom plate 311, a pillar 312 and a side plate 313, the bottom plate 311 is arranged on the base plate 100, the pillar 312 is fixed to one end surface of the bottom plate 311 through a fixing block, one end surface of the pillar 312 is connected to the first end side wall of the side plate 313, and one end surface of the bottom plate 311 is provided with a supporting block; a force sensor 320, the force sensor 320 is arranged on the supporting block, one end surface of the force sensor 320 is connected to one end surface of the pillar 312; a buffer spring 330, the buffer spring 330 is arranged on the pillar 312; a second connecting plate 340, one end side wall of the second connecting plate 340 is connected to the second end side wall of the side plate 313; a servo module, the servo module is connected to the second connecting plate 340.

[0048] It should be noted that the base plate 311 is used to place the force sensor 320, the pillar 312 and the side plate 313. The force sensor 320 is used to accurately obtain the axial force generated when clamping the ball screw. The servo module is used to drive the movement of the base plate 311 on the first slide rail 120. The buffer spring 330 is used to buffer the impact force generated when the base plate 311 moves along the first slide rail 120. In summary, by driving the movement of the base plate 311 through the servo module, the force sensor 320 can obtain the axial force generated in the process of clamping ball screws of different lengths, and the setting of the buffer spring 330 buffers the impact force of the pillar 312 on the force sensor 320 during the movement of the base plate 311, so as to reduce the influence on the force sensor 320.

[0049] In a specific embodiment, the servo module includes: a third slide rail, which is arranged on the substrate 100; a sliding chain, which is slidably installed on the third slide rail, and one end of the sliding chain is connected to the second end side wall of the second connecting plate 340.

[0050] It should be noted that the sliding chain is connected to the second connecting plate 340, and the sliding chain moves along the third slide rail. The movement of the sliding chain drives the movement of the second connecting plate 340, thereby driving the movement of the base plate 311, so that the force sensor 320 starts working, accurately obtaining the axial force generated by the workpiece fixing structure when clamping the ball screw, thereby obtaining higher measurement accuracy.

[0051] In a specific embodiment, the measuring mechanism includes: a displacement sensor 410 ; and a servo motor 420 , wherein an output end of the servo motor 420 is connected to the displacement sensor 410 .

[0052] It should be noted that the servo motor 420 is used to drive the displacement sensor 410. The function of the floating probe is to contact the ball screw and transmit the position signal of the ball screw to the displacement sensor 410 before and after the ball screw generates relative displacement due to thrust. The displacement sensor 410 is used to measure and display the relative displacement value of the ball screw in the axial direction.

[0053] In a specific embodiment, the end of the floating probe contacting the ball screw is tapered.

[0054] It should be noted that by setting the end of the floating probe that contacts the ball screw to be tapered, the contact area between the floating probe and the side wall of the ball screw is reduced, so that the floating probe can be compatible with ball screws of various diameters.

[0055] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A clearance measuring device for a ball screw, characterized in that: It includes: A base plate, one end of which is provided with a support plate, and the support plate is slidably connected to the base plate via a first slide rail; A workpiece fixing structure, the workpiece fixing structure comprising a locking assembly and a clamping mechanism, the locking assembly being arranged on the base plate, the clamping mechanism being slidably arranged on the first slide rail, the clamping mechanism comprising a four-way floating mechanism and a chuck clamping device, the four-way floating mechanism being connected to the chuck clamping device; A thrust mechanism, the thrust mechanism is arranged on the first slide rail, and the thrust mechanism is connected to the four-way floating mechanism; A measuring mechanism is arranged on the base plate and is connected to the locking assembly.

2. The clearance measuring device for a ball screw according to claim 1, characterized in that: The four-way floating mechanism comprises: A support seat, the support seat is arranged on the support plate, and a support plate is arranged on a first side wall of the support seat; A Y guide block, one end surface of the Y guide block is connected to one end surface of the support seat; An X guide block, one end surface of the X guide block is connected to the other end surface of the Y guide block; A first motor, wherein the first motor is disposed on the support plate; A first connecting plate, wherein one end surface of the first connecting plate is connected to the other end surface of the X guide block, and the first connecting plate is connected to the thrust mechanism.

3. The clearance measuring device for a ball screw according to claim 2, characterized in that: The chuck clamping device is arranged on the other end surface of the first connecting plate, and the chuck clamping device comprises: A connecting block, one end surface of the connecting block is connected to the other end surface of the first connecting plate; A clamping chuck is arranged on the other end surface of the connecting block.

4. The clearance measuring device for a ball screw according to claim 1, characterized in that: The locking assembly comprises: A nut locking device, wherein the nut locking device is arranged on the base plate through a second slide rail; A screw locking device is arranged on the base plate.

5. The clearance measuring device for a ball screw according to claim 4, characterized in that: The nut locking device comprises: A slider, the bottom of which is slidably disposed on the base plate via a second slide rail, and the slider is provided with a first groove; a second motor, the second motor being mounted and fixed on the first groove; A limit block, wherein the limit block is arranged on the base plate through the second slide rail, a fixing device is arranged at one end of the limit block away from the slider, the limit block is connected to the motor through the fixing device, a nut clamping part is arranged in the middle part of the limit block, the nut clamping part includes a second groove and a first clamping pad, one end surface of the first clamping pad is connected to the inner side wall of the second groove, and the other end surface of the first clamping pad is clamped against the side wall of the nut.

6. The clearance measuring device for a ball screw according to claim 4, characterized in that: The screw locking device comprises: The clamping block comprises a third groove and a second clamping pad, wherein one end surface of the second clamping pad is connected to the inner side wall of the third groove, and the other end surface of the second clamping pad is in contact with the side wall of the nut for clamping.

7. The clearance measuring device for a ball screw according to claim 1, characterized in that: The thrust mechanism comprises: A supporting device, the supporting device comprising a bottom plate, a pillar and a side plate, the bottom plate is arranged on the base plate, the pillar is fixed to one end surface of the bottom plate through a fixing block, one end surface of the pillar is connected to the side wall of the first end of the side plate, and a supporting block is arranged on one end surface of the bottom plate; A force sensor, wherein the force sensor is disposed on the support block, and one end surface of the force sensor is connected to one end surface of the support column; A buffer spring, the buffer spring being arranged on the support column; A second connecting plate, wherein a side wall at one end of the second connecting plate is connected to a side wall at a second end of the side plate; A servo module is connected to the second connecting plate.

8. The clearance measuring device for a ball screw according to claim 7, characterized in that: The servo module comprises: a third slide rail, the third slide rail being arranged on the base plate; A sliding chain is slidably mounted on the third slide rail, and one end of the sliding chain is connected to the second end side wall of the second connecting plate.

9. The clearance measuring device for a ball screw according to any one of claims 1 to 8, characterized in that: The measuring mechanism comprises: A displacement sensor, wherein a floating probe is provided at one end of the displacement sensor, and the floating probe is connected to an input end of the displacement sensor; A servo motor, wherein the output end of the servo motor is connected to the displacement sensor.

10. The clearance measuring device for a ball screw according to claim 9, characterized in that: The end portion of the floating probe contacting the ball screw is tapered.

Images