Gap detection device and gap detection method for ball screw pair

Abstract

The invention provides a gap detection device and method for a ball screw pair, and the device comprises a clamping pedestal which is used for clamping a ball screw of the ball screw pair; the operation assembly is used for being connected with the ball screw pair and driving a ball screw nut of the ball screw pair to rotate, so that the ball screw nut is driven to do axial reciprocating motion; and the measuring assembly is used for measuring the rotation angle and the axial position information of the ball screw nut. The axial position information of the ball screw nut at the initial position (the leftmost end or the rightmost end of the ball screw) is measured for the first time through the measuring assembly, and the axial position information of the ball screw nut is obtained again after the operation assembly drives the ball screw nut to perform axial reciprocating motion to return to the initial position. The axial clearance of the ball screw pair is determined according to the two axial position information, and the problems that in the prior art, a method for measuring the axial clearance of a roller screw is complex in operation and low in detection precision are solved.

Description

Technical Field

[0001] The present application relates to the technical field of gap detection of ball screw pairs, and in particular to a gap detection device and a gap detection method for ball screw pairs. Background Art

[0002] As a common mechanical transmission element, roller screws are widely used in CNC machine tools, automation equipment, precision instruments and other fields. The size of its axial clearance directly affects the positioning accuracy and repeatability of the equipment. The clearance of a ball screw refers to the size of the gap between the ball and the screw. The size of this gap will affect the accuracy, stiffness and smoothness of the ball screw. Generally speaking, the smaller the gap of the ball screw, the higher its accuracy and stiffness will be, but the movement resistance will also increase. On the contrary, the larger the gap, the smoothness of movement will be improved, but the accuracy and stiffness will be reduced. In order to ensure the normal operation and service life of the ball screw, it is necessary to regularly check and maintain the clearance of the ball screw to ensure that it is within the specified range. If the clearance is found to be too large or too small, it should be adjusted or replaced in time to ensure the normal operation of the ball screw.

[0003] At present, there are many methods for measuring the axial clearance of roller screws on the market, but most of them have problems such as complex operation, low detection accuracy or high equipment cost. Therefore, it is of great significance to develop a high-precision, easy-to-operate and moderately costly roller screw clearance detection method and device.

[0004] To address the above problems, no effective solution has been proposed yet. Summary of the invention

[0005] The main purpose of the present application is to provide a gap detection device and a gap detection method for a ball screw pair, so as to solve the problems of complex operation and low detection accuracy of the prior art method for measuring the axial gap of a roller screw.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a gap detection device for a ball screw pair is provided, including: a clamping base, the clamping base is used to clamp the ball screw of the ball screw pair; an operating component, the operating component is used to connect with the ball screw pair and drive the ball screw nut of the ball screw pair to rotate, thereby driving the ball screw nut to perform axial reciprocating motion; and a measuring component, the measuring component is used to measure the rotation angle and axial position information of the ball screw nut.

[0007] Furthermore, the operating assembly has a measuring hole, and when the operating assembly is connected to the ball screw pair, at least a portion of the ball screw nut extends into the measuring hole.

[0008] Furthermore, the operating component includes: a bearing, two bearings, and the two bearings are respectively arranged on both sides of the ball screw nut; a sleeve assembly, the sleeve assembly is arranged along the circumference of the ball screw nut, and the measuring hole is opened on the sleeve assembly; wherein, when the operating component is connected to the ball screw, the bearing and the ball screw nut are both located in the sleeve assembly, and the sleeve assembly is operated to rotate the bearing and the ball screw nut.

[0009] Furthermore, an operating hole is provided on the sleeve assembly, and the operating assembly also includes: an operating member, which is used to connect to the ball screw, and the operating member is arranged along the circumference of the ball screw. When the operating member is connected to the ball screw, the operating member is located in the sleeve assembly, and at least part of the operating member is arranged corresponding to the operating hole; wherein, driving the operating member to rotate can drive the sleeve assembly and the ball screw nut to rotate synchronously.

[0010] Furthermore, the sleeve assembly includes: a first sleeve, on which a measuring hole is opened; and a second sleeve, which is detachably connected to the first sleeve; wherein, when the operating assembly is connected to the ball screw pair, the bearing and the ball screw nut are both located in the first sleeve, and operating the second sleeve can cause the first sleeve, the bearing and the ball screw nut to rotate synchronously.

[0011] Furthermore, the second sleeve includes: a connecting section, one end of which is detachably connected to the first sleeve; an operating section, which is connected to the other end of the connecting section, and the operating section is operated to make the connecting section, the first sleeve, the bearing and the ball screw nut rotate synchronously; wherein the diameter of the connecting section is set larger than the diameter of the operating section.

[0012] Furthermore, the second sleeve is connected to the first sleeve via threads.

[0013] Furthermore, the measuring component includes: a pointer micrometer, which is used to measure the angle of rotation of the ball screw nut along the circumferential direction; and a lever micrometer, which is used to measure the axial position information of the ball screw nut.

[0014] According to another aspect of the present application, a method for detecting the gap of a ball screw pair is provided, and the method is performed using the above-mentioned gap detection device for a ball screw pair, and the method includes the following steps: connecting an operating component to the ball screw pair; connecting a clamping base to the ball screw of the ball screw pair; using a measuring component to measure first initial axial position information of a ball screw nut of the ball screw pair; operating the operating component to drive the ball screw nut to move a first preset distance along a first preset direction, and then operating the operating component to drive the ball screw nut to move a second preset distance along a second preset direction, wherein the first preset direction is set opposite to the second preset direction, and the first preset distance is equal to the second preset distance; using a measuring component to measure the second initial position information of the ball screw nut; and determining the gap value of the ball screw pair based on the first initial axial position information and the second initial axial position information.

[0015] Furthermore, the operating component is connected to the ball screw, including the following steps: installing two bearings on both sides of the ball screw nut respectively; connecting the operating member to the ball screw; installing the two bearings and the ball screw nut into the first sleeve; installing the operating member into the operating hole of the second sleeve; and connecting the first sleeve to the second sleeve.

[0016] By applying the technical solution of the present application, a clamping base is provided to clamp the ball screw of the ball screw pair, and the axial position information of the ball screw nut at the initial position (the leftmost end or the rightmost end of the ball screw) is first measured by the measuring component. After the operating component drives the ball screw nut to perform axial reciprocating motion and return to the initial position, the axial position information of the ball screw nut is obtained again, and the axial clearance of the ball screw pair is determined based on the two axial position information. The operation is simple and the detection accuracy is high, which solves the problems of complex operation and low detection accuracy of the prior art method for measuring the axial clearance of the roller screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 A schematic structural diagram of an embodiment of a gap detection device for a ball screw pair according to the present application is shown;

[0019] Figure 2 A schematic structural diagram of an embodiment of a gap detection device for a ball screw pair according to the present application is shown;

[0020] Figure 3 Shows Figure 2 Enlarged view of point A in the middle.

[0021] The above drawings include the following reference numerals:

[0022] 11. Ball screw;

[0023] 12. Ball screw nut;

[0024] 30. Operation components;

[0025] 31. Bearings;

[0026] 32. Sleeve assembly;

[0027] 321, first sleeve;

[0028] 3211, measuring hole;

[0029] 322, second sleeve;

[0030] 3221, connecting section;

[0031] 3222, operation section;

[0032] 3223, operation hole;

[0033] 33. Operating parts;

[0034] 331. Through hole. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0039] Combination Figures 1 to 3 As shown, in a specific embodiment of the present application, a gap detection device for a ball screw pair is provided.

[0040] Specifically, the gap detection device for the ball screw pair includes a clamping base, an operating component 30 and a measuring component. The clamping base is used to clamp the ball screw 11 of the ball screw pair; the operating component 30 is used to connect with the ball screw pair and drive the ball screw nut 12 of the ball screw pair to rotate, thereby driving the ball screw nut 12 to perform axial reciprocating motion; the measuring component is used to measure the rotation angle and axial position information of the ball screw nut 12.

[0041] By applying the technical solution of the present application, a clamping base is provided to clamp the ball screw 11 of the ball screw pair, the operating component 30 is connected to the ball screw pair and drives the ball screw nut 12 of the ball screw pair to rotate, thereby driving the ball screw nut 12 to perform axial reciprocating motion, and a measuring component is provided to measure the rotation angle and axial position information of the ball screw nut 12, and the axial position information of the ball screw nut at the initial position (the leftmost or rightmost end of the ball screw) is first measured by the measuring component, and after the operating component drives the ball screw nut to perform axial reciprocating motion and returns to the initial position, and the angle information of the reciprocating motion of the ball screw nut 12 is accurately measured by the measuring component, the axial position information of the ball screw nut is obtained again, and the axial clearance of the ball screw pair is determined based on the two axial position information. The operation is simple and the detection accuracy is high, which solves the problems of complex operation and low detection accuracy of the prior art method for measuring the axial clearance of the roller screw.

[0042] In a specific embodiment of the present application, the clamping base and the measuring component are both arranged on a machine tool, the clamping base includes a clamping member, and the clamping member includes a tailstock with a top on a CNC lathe, and the tailstock pressure ensures that the clamped workpiece (ball screw 11) does not rotate in a circle after clamping. This arrangement reduces the production cost of the gap detection device for the ball screw pair, and the rotation angle and axial position information measured by the measuring component can be directly processed by the machine tool to obtain the gap value of the ball screw pair, thereby improving the reliability of the gap detection device for the ball screw pair.

[0043] Furthermore, the operating assembly 30 has a measuring hole 3211 . When the operating assembly 30 is connected to the ball screw pair, at least a portion of the ball screw nut 12 extends into the measuring hole 3211 .

[0044] Combination Figure 1 As shown, when the operating assembly 30 is connected to the ball screw pair, at least part of the ball screw nut 12 extends into the measuring hole 3211, so that the measuring assembly can measure the rotation angle and axial position information of the ball screw nut 12 through the measuring hole 3211. In this embodiment, the spline of the ball screw nut 12 can be used as a measurement object for measurement to improve the clearance detection accuracy of the ball screw pair. In other embodiments of the present application, a mark can also be made on the ball screw nut 12, and the mark point or marker can be used as a measurement object for measurement, which solves the problem of low detection accuracy of the prior art method for measuring the axial clearance of the roller screw.

[0045] Furthermore, the operating component 30 includes a bearing 31 and a sleeve assembly 32. There are two bearings 31, and the two bearings 31 are respectively arranged on both sides of the ball screw nut 12; the sleeve assembly 32 is arranged along the circumference of the ball screw nut 12, and the measuring hole 3211 is opened on the sleeve assembly 32; wherein, when the operating component 30 is connected to the ball screw 11, the bearing 31 and the ball screw nut 12 are both located in the sleeve assembly 32, and the sleeve assembly 32 is operated to rotate the bearing 31 and the ball screw nut 12.

[0046] In this embodiment, when the operating assembly 30 is connected to the ball screw 11, the bearing 31 and the ball screw nut 12 are both located in the sleeve assembly 32, and the two bearings 31 are respectively located on both sides of the ball screw nut 12, so as to achieve a clamping effect on the ball screw nut 12, so as to drive the ball screw nut 12 to rotate synchronously. When the operating assembly 30 is connected to the ball screw 11, the bearing 31 and the ball screw nut 12 are both located in the sleeve assembly 32, and such a setting can reduce the friction between the sleeve assembly 32 and the ball screw nut 12 through the bearing 31.

[0047] Furthermore, an operating hole 3223 is provided on the sleeve assembly 32, and the operating assembly 30 also includes an operating member 33, which is used to connect with the ball screw 11. The operating member 33 is arranged along the circumference of the ball screw 11. When the operating assembly 30 is connected with the ball screw 11, the operating member 33 is located in the sleeve assembly 32, and at least part of the operating member 33 is arranged corresponding to the operating hole 3223; wherein, driving the operating member 33 to rotate can drive the sleeve assembly 32 and the ball screw nut 12 to rotate synchronously.

[0048] In this embodiment, the operating hole 3223 can be set as a square hole, and the width of the operating hole 3223 along the axial direction of the sleeve assembly 32 is set in coordination with the thickness of the operating member 33 to ensure that when the operating assembly 30 is connected to the ball screw 11, the operating member 33 will not move in the operating hole 3223 (that is, the operating member 33 and the sleeve assembly 32 rotate relative to each other), but the operating member 33 rotates to drive the sleeve assembly 32 and the ball screw nut 12 to rotate synchronously. This setting can control the rotation of the operating member 33 to rotate the ball screw nut 12 to a preset position, avoiding the problem of low accuracy of roller screw axial clearance detection caused by too small rotation resistance of the ball screw nut 12, and improving the stability of the clearance detection device.

[0049] Furthermore, the sleeve assembly 32 includes a first sleeve 321 and a second sleeve 322, and the measuring hole 3211 is opened on the first sleeve 321; the second sleeve 322 is detachably connected to the first sleeve 321; wherein, when the operating assembly 30 is connected to the ball screw pair, the bearing 31 and the ball screw nut 12 are both located in the first sleeve 321, and operating the second sleeve 322 can make the first sleeve 321, the bearing 31 and the ball screw nut 12 rotate synchronously.

[0050] Combination Figure 2 As shown, in a specific embodiment of the present application, when the operating component 30 is connected to the ball screw pair, the first sleeve 321 is connected to the second sleeve 322, and part of the second sleeve 322 is located in the first sleeve 321. At this time, the bearing 31 and the ball screw nut 12 are both located in the first sleeve 321, and the two bearings 31 are respectively located on both sides of the ball screw nut 12, one of the bearings 31 abuts against the side of the second sleeve 322 close to the first sleeve 321, and the end face of the other bearing 31 is flush with the end face of the first sleeve 321 away from the second sleeve 322. By operating the second sleeve 322, the first sleeve 321, the bearing 31 and the ball screw nut 12 can be rotated synchronously, so that the measuring component can measure the rotation angle and axial position information of the ball screw nut 12 through the measuring hole 3211. Among them, the second sleeve 322 can be manually operated to drive the first sleeve 321, the bearing 31 and the ball screw nut 12 to rotate synchronously, or the output end of the driving motor can be set to be connected to the second sleeve 322, and the second sleeve 322 can be driven by the driving motor to drive the first sleeve 321, the bearing 31 and the ball screw nut 12 to rotate synchronously. This arrangement improves the adaptability of the gap detection device, and facilitates the use of different driving methods in different scenarios to perform gap measurement.

[0051] In another embodiment of the present application, when the operating assembly 30 is connected to the ball screw pair, the first sleeve 321 is connected to the second sleeve 322, and part of the second sleeve 322 is located in the first sleeve 321. At this time, the bearing 31 and the ball screw nut 12 are both located in the first sleeve 321, and the two bearings 31 are respectively located on both sides of the ball screw nut 12, one of the bearings 31 abuts against the side of the second sleeve 322 close to the first sleeve 321, and the end face of the other bearing 31 is arranged flush with the end face of the first sleeve 321 away from the second sleeve 322. The operating member 33 is located in the sleeve assembly 32, and at least part of the operating member 33 is arranged corresponding to the operating hole 3223. By operating the operating member 33, the second sleeve 322, the first sleeve 321, the bearing 31 and the ball screw nut 12 can be rotated synchronously, so that the measuring assembly can measure the rotation angle and axial position information of the ball screw nut 12 through the measuring hole 3211. Among them, the first sleeve 321, the bearing 31 and the ball screw nut 12 can be driven to rotate synchronously by manually operating the operating member 33, or the output end of the driving motor can be set to be connected to the operating member 33, and the second sleeve 322, the first sleeve 321, the bearing 31 and the ball screw nut 12 can be driven to rotate synchronously by the driving motor driving the operating member 33. This arrangement improves the adaptability of the gap detection device.

[0052] Furthermore, the second sleeve 322 includes a connecting section 3221 and an operating section 3222, one end of the connecting section 3221 is detachably connected to the first sleeve 321; the operating section 3222 is connected to the other end of the connecting section 3221, and the operating section 3222 is operated to make the connecting section 3221, the first sleeve 321, the bearing 31 and the ball screw nut 12 rotate synchronously; wherein, the diameter of the connecting section 3221 is set larger than the diameter of the operating section 3222.

[0053] In one embodiment of the present application, one end of the connecting section 3221 and the first sleeve 321 can be connected by bolts, screws or other fasteners, and the operating section 3222 can be driven by manual operation or by a driving motor to drive the connecting section 3221, the first sleeve 321, the bearing 31 and the ball screw nut 12 to rotate synchronously. The diameter of the connecting section 3221 is larger than the diameter of the operating section 3222, which can provide better support and bearing capacity, and also help to improve the stability of the gap detection device.

[0054] Combination Figure 3As shown, in one of the specific embodiments of the present application, the operating member 33 is a nut, and a through hole 331 is opened on the operating member 33. The driving rod is inserted into the through hole 331, and the operating member 33 is driven to rotate along the ball screw 11 by moving the driving rod, thereby driving the connecting section 3221, the first sleeve 321, the bearing 31 and the ball screw nut 12 to rotate synchronously, so as to measure the gap of the roller screw pair.

[0055] Combination Figure 2 As shown, in this embodiment, when the operating assembly 30 is connected to the ball screw pair, the first sleeve 321 is connected to the second sleeve 322, the bearing 31 and the ball screw nut 12 are both located in the first sleeve 321, and the two bearings 31 are respectively located on both sides of the ball screw nut 12, one of the bearings 31 abuts against the side of the second sleeve 322 close to the first sleeve 321, and the end face of the other bearing 31 is flush with the end face of the first sleeve 321 away from the second sleeve 322, the operating member 33 is located in the sleeve assembly 32, and at least part of the operating member 33 is arranged corresponding to the operating hole 3223. When the operating member 33 rotates relative to the ball screw 11, the second sleeve 322 and the first sleeve 321 can be driven to rotate synchronously, resulting in movement along the axial direction of the ball screw 11. At this time, since bearings 31 are provided on both sides of the ball screw nut 12, the ball screw nut 12 is further driven to rotate synchronously through the cooperation of the bearing 31 with the second sleeve 322 and the first sleeve 321, resulting in movement along the axial direction of the ball screw 11, so that the measuring component can measure the rotation angle and axial position information of the ball screw nut 12. The gap detection device has a simple structure and low cost, can meet the needs of regular inspection of the ball screw pair, and the subject is widely used in the detection of the ball screw pair.

[0056] Furthermore, the second sleeve 322 is connected to the first sleeve 321 by threads. This arrangement simplifies the processing technology and facilitates disassembly, thereby reducing the complexity of the method for measuring the axial clearance of the roller screw pair.

[0057] Furthermore, the measuring assembly includes a pointer micrometer and a lever micrometer. The pointer micrometer is used to measure the angle of rotation of the ball screw nut 12 along the circumferential direction; the lever micrometer is used to measure the axial position information of the ball screw nut 12 .

[0058] In this embodiment, the operating hole 3223 can be set as a square hole, and the width of the operating hole 3223 along the axial direction of the sleeve assembly 32 is set in coordination with the thickness of the operating member 33 to ensure that when the operating assembly 30 is connected to the ball screw 11, the operating member 33 will not move in the operating hole 3223 (that is, the operating member 33 and the sleeve assembly 32 rotate relative to each other), but the operating member 33 rotates to drive the sleeve assembly 32 and the ball screw nut 12 to rotate synchronously. This setting can measure the rotation angle of the ball screw nut 12 through a pointer micrometer, and control the rotation of the operating member 33 to make the ball screw nut 12 rotate to a preset position, thereby improving the detection accuracy of the gap detection.

[0059] When the ball screw nut 12 is operated to perform axial reciprocating motion, the axial position information of the ball screw nut 12 can be measured by the lever micrometer, and the clearance value of the ball screw pair can be determined by the axial position information. This arrangement makes the clearance detection of the ball screw pair simple and fast, and improves the detection efficiency.

[0060] In another embodiment of the present application, a method for detecting a gap of a ball screw pair is provided. The method is performed using the gap detection device for a ball screw pair in the above embodiment. The method comprises the following steps:

[0061] Step S1: Connect the operating assembly 30 to the ball screw pair.

[0062] In step S1 , after the operating assembly 30 is connected to the ball screw pair, the operating assembly 30 can drive the ball screw nut 12 of the ball screw pair to rotate, thereby driving the ball screw nut 12 to perform axial reciprocating motion along the ball screw 11 .

[0063] Step S2: Connect the clamping base to the ball screw 11 of the ball screw pair.

[0064] In step S2 , the clamping base is clamped at both ends of the ball screw 11 to limit the axial movement of the ball screw 11 .

[0065] Step S3: using a measuring assembly to measure first initial axial position information of the ball screw nut 12 of the ball screw pair.

[0066] In step S3, the operating component 30 and the ball screw nut 12 are moved to one end (the leftmost end or the rightmost end) of the ball screw 11 as the initial position, and the first initial axial position information of the ball screw nut 12 at this time is measured by measuring the lever micrometer in the measuring component.

[0067] Step S4: operate the operating component 30 to drive the ball screw nut 12 to move a first preset distance along a first preset direction, and then operate the operating component 30 to drive the ball screw nut 12 to move a second preset distance along a second preset direction, wherein the first preset direction is set opposite to the second preset direction, and the first preset distance is equal to the second preset distance.

[0068] In step S4, the operating assembly 30 is operated to drive the ball screw nut 12 to rotate one circle in the clockwise direction (or counterclockwise direction), that is, to move the first preset distance in the first preset direction. Then the operating assembly 30 is operated again to drive the ball screw nut 12 to rotate one circle in the counterclockwise direction (or clockwise direction), that is, to move the second preset distance in the second preset direction. After completing the two movements, the ball screw nut 12 is actually located at the initial position in step S3. The number of rotations of the ball screw nut 12 is determined by measuring with a pointer micrometer to ensure the rotation accuracy of the ball screw nut 12.

[0069] Step S5: using a measuring assembly to measure the second initial axial position information of the ball screw nut 12 .

[0070] In step S5, after completing two movements, the ball screw nut 12 is actually located at the initial position in step S3, and the second initial axial position information of the ball screw nut 12 at this time is measured by the lever micrometer in the measuring assembly.

[0071] Step S6: Determine the clearance value of the ball screw pair according to the first initial axial position information and the second initial axial position information.

[0072] In step S6, if the clamping base is set on a CNC machine tool, the clearance value of the ball screw pair can be determined by the first initial axial position information and the second initial axial position information obtained on the CNC machine tool. This setting can directly obtain the clearance value of the ball screw pair and reduce errors caused by manual calculation. In other embodiments of the present application, the first initial axial position information and the second initial axial position information can also be input through a separately set program, and the clearance value of the ball screw pair can be determined to meet the data requirements in different situations.

[0073] Through the above steps, the axial clearance value of the ball screw pair is measured, the operation method is simple, and the measurement accuracy is high, which improves the reliability and practicality of the clearance detection method of the ball screw pair.

[0074] Furthermore, connecting the operating assembly 30 to the ball screw 11 includes the following steps:

[0075] Step S11: Install two bearings 31 on both sides of the ball screw nut 12 respectively.

[0076] In step S11, two bearings 31 are respectively installed on both sides of the ball screw nut 12 to clamp the ball screw nut 12, thereby avoiding the problem of low accuracy in roller screw axial clearance detection due to too small rotational resistance of the ball screw nut 12 and improving the stability of the clearance detection device.

[0077] Step S12: Connect the operating member 33 to the ball screw 11.

[0078] In step S12, the operating member 33 can be set as a nut, and the operating member 33 is connected to the ball screw 11 through a thread. The operating member 33 is provided with a through hole 331, and the driving rod is inserted into the through hole 331. The operating member 33 is driven to rotate along the ball screw 11 by moving the driving rod, and then the connecting section 3221, the first sleeve 321, the bearing 31 and the ball screw nut 12 are driven to rotate synchronously, so as to measure the clearance of the roller screw pair.

[0079] Step S13 : Install the two bearings 31 and the ball screw nut 12 into the first sleeve 321 .

[0080] In step S13, combined Figure 2 As shown, the first sleeve 321 is connected to the ball screw 11 through the bearing 31 to reduce the friction between the first sleeve 321 and the ball screw 11, and by respectively installing the two bearings 31 on both sides of the ball screw nut 12, the clamping effect on the ball screw nut 12 is achieved, so that the first sleeve 321 drives the two bearings 31 and the ball screw nut 12 to rotate synchronously.

[0081] Step S14 : installing the operating member 33 into the operating hole 3223 of the second sleeve 322 .

[0082] In step S14, a through hole 331 is opened in the operating member 33, and the driving rod is inserted into the through hole 331. The driving rod is moved to drive the operating member 33 to rotate along the ball screw 11, thereby driving the connecting section 3221, the first sleeve 321, the bearing 31 and the ball screw nut 12 to rotate synchronously, so as to measure the clearance of the roller screw pair.

[0083] Step S15: Connect the first sleeve 321 and the second sleeve 322 .

[0084] In step S15, by connecting the first sleeve 321 with the second sleeve 322, the operating member 33 is rotated along the ball screw 11, thereby driving the connecting section 3221, the first sleeve 321, the bearing 31 and the ball screw nut 12 to rotate synchronously, so as to measure the clearance of the roller screw pair.

[0085] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0086] 1. The axial position information of the ball screw nut 12 is first confirmed at one end (the leftmost end or the rightmost end) of the ball screw 11 through the measuring component. After the operating component 30 drives the ball screw nut 12 to perform axial reciprocating motion and the angle information of the reciprocating motion of the ball screw nut 12 is accurately measured through the measuring component, the axial position information of the ball screw nut 12 is obtained again at the same end of the ball screw 11 through the measuring component. The axial clearance of the ball screw pair is determined based on the two axial position information. The operation is simple and the detection accuracy is high, which solves the problem of complex operation and low detection accuracy of the method for measuring the axial clearance of the roller screw in the prior art.

[0087] 2. The clearance detection device for the ball screw pair in the present application has a simple structure, low cost, convenient operation and high practicality.

[0088] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0089] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0090] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0091] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A clearance detection device for a ball screw pair, characterized in that: include: A clamping base, the clamping base being used to clamp a ball screw (11) of the ball screw pair; An operating assembly (30), the operating assembly (30) being used to be connected to the ball screw pair and drive the ball screw nut (12) of the ball screw pair to rotate, thereby driving the ball screw nut (12) to perform axial reciprocating motion; A measuring component is provided, wherein the measuring component is used to measure the rotation angle and axial position information of a ball screw nut (12).

2. The gap detection device according to claim 1, characterized in that: The operating component (30) has a measuring hole (3211), and when the operating component (30) is connected to the ball screw pair, at least a portion of the ball screw nut (12) extends into the measuring hole (3211).

3. The gap detection device according to claim 2, characterized in that: The operating component (30) comprises: Bearings (31), there are two bearings (31), and the two bearings (31) are respectively arranged on both sides of the ball screw nut (12); A sleeve assembly (32), wherein the sleeve assembly (32) is arranged along the circumference of the ball screw nut (12), and the measuring hole (3211) is opened on the sleeve assembly (32); When the operating assembly (30) is connected to the ball screw (11), the bearing (31) and the ball screw nut (12) are both located in the sleeve assembly (32), and the sleeve assembly (32) is operated to rotate the bearing (31) and the ball screw nut (12).

4. The gap detection device according to claim 3, characterized in that: The sleeve assembly (32) is also provided with an operating hole (3223), and the operating assembly (30) further comprises: an operating member (33), the operating member (33) being used to be connected to the ball screw (11), the operating member (33) being arranged along the circumference of the ball screw (11), and when the operating assembly (30) is connected to the ball screw (11), the operating member (33) is located in the sleeve assembly (32), and at least a portion of the operating member (33) is arranged corresponding to the operating hole (3223); Wherein, driving the operating member (33) to rotate can drive the sleeve assembly (32) and the ball screw nut (12) to rotate synchronously.

5. The gap detection device according to claim 3 or 4, characterized in that: The sleeve assembly (32) comprises: A first sleeve (321), wherein the measuring hole (3211) is provided on the first sleeve (321); a second sleeve (322), the second sleeve (322) being detachably connected to the first sleeve (321); When the operating assembly (30) is connected to the ball screw pair, the bearing (31) and the ball screw nut (12) are both located in the first sleeve (321), and the second sleeve (322) is operated to enable the first sleeve (321), the bearing (31) and the ball screw nut (12) to rotate synchronously.

6. The gap detection device according to claim 5, characterized in that: The second sleeve (322) comprises: A connecting section (3221), one end of which is detachably connected to the first sleeve (321); an operating section (3222), the operating section (3222) being connected to the other end of the connecting section (3221), and the operating section (3222) being operated to make the connecting section (3221), the first sleeve (321), the bearing (31) and the ball screw nut (12) rotate synchronously; Wherein, the diameter of the connecting section (3221) is set larger than the diameter of the operating section (3222).

7. The gap detection device according to claim 5, characterized in that: The second sleeve (322) is connected to the first sleeve (321) via threads.

8. The gap detection device according to claim 1, characterized in that: The measuring assembly comprises: A pointer micrometer, the pointer micrometer is used to measure the angle of rotation of the ball screw nut (12) in the circumferential direction; A lever micrometer, the lever micrometer is used to measure the axial position information of the ball screw nut (12).

9. A method for detecting the clearance of a ball screw pair, characterized in that: The method is performed using the gap detection device for a ball screw pair according to any one of claims 1 to 8, and the method comprises the following steps: Connecting the operating assembly (30) to the ball screw pair; Connecting the clamping base to the ball screw (11) of the ball screw pair; Using a measuring component to measure first initial axial position information of a ball screw nut (12) of a ball screw pair; The operating assembly (30) is operated to drive the ball screw nut (12) to move a first preset distance along a first preset direction, and then the operating assembly (30) is operated to drive the ball screw nut (12) to move a second preset distance along a second preset direction, wherein the first preset direction is opposite to the second preset direction, and the first preset distance is equal to the second preset distance; Using a measuring component to measure second initial position information of the ball screw nut (12); A clearance value of the ball screw pair is determined according to the first initial axial position information and the second initial position information.

10. The gap detection method according to claim 9, characterized in that: Connecting the operating assembly (30) to the ball screw (11) comprises the following steps: Installing two bearings (31) on both sides of the ball screw nut (12) respectively; Connecting the operating member (33) to the ball screw (11); Installing the two bearings (31) and the ball screw nut (12) into the first sleeve (321); Installing the operating member (33) into the operating hole (3223) of the second sleeve (322); The first sleeve (321) is connected to the second sleeve (322).

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