Lead screw radial play measuring instrument

Abstract

The application relates to the field of measuring tools, in particular to a radial play measuring instrument for a lead screw, which comprises a base, a clamping assembly and a measuring assembly. The clamping assembly is connected to the base, and the clamping assembly can clamp the two ends of the lead screw to form positioning. The measuring assembly comprises a measuring seat, a pressing top rod and a measuring table. The measuring seat is slidingly connected to the surface of the base, the sliding direction of the measuring seat is parallel to the axis of the lead screw, one end of the pressing top rod is threadedly connected to the surface of the measuring seat facing the lead screw, the other end of the pressing top rod can abut against the surface of the lead screw to form limiting, and the measuring table is connected to the surface of the measuring seat. The measuring end of the measuring table can abut against the surface of the lead screw and perform radial play measurement. In the application, the measuring seat, the pressing top rod and the measuring table are arranged, the measuring end of the measuring table performs radial play measurement on the surface of the lead screw, the radial play of each position of the lead screw is measured, and the measuring force can be regulated according to the design requirements, so that the accuracy of the radial play measurement of the lead screw is improved.

Description

Technical Field

[0001] This application relates to the field of measuring tools, and more particularly to a lead screw radial clearance measuring instrument. Background Technology

[0002] A lead screw is a precision transmission element that converts rotary motion into linear motion, or linear motion into rotary motion.

[0003] In the existing technology, the radial clearance of the lead screw is measured by fixing the lead screw on a clamp, pushing the lead screw by hand, and checking it with a magnetoelectric instrument. Since the force of pushing by hand varies, there will be measurement error in the radial clearance of the lead screw, thus reducing the measurement accuracy of the lead screw. Utility Model Content

[0004] To improve the measurement accuracy of lead screws, this application provides a lead screw radial clearance measuring instrument.

[0005] This application provides a radial clearance measuring instrument for lead screws, which adopts the following technical solution:

[0006] A radial clearance measuring instrument for a lead screw includes a base, a clamping assembly, and a measuring assembly. The clamping assembly is connected to the base and can clamp both ends of the lead screw to form a positioning. The measuring assembly includes a measuring seat, a clamping rod, and a measuring gauge. The measuring seat is slidably connected to the surface of the base, and the sliding direction of the measuring seat is parallel to the axis of the lead screw. One end of the clamping rod is threaded to the surface of the measuring seat facing the lead screw, and the other end of the clamping rod can press against the surface of the lead screw to form a limit. The measuring gauge is connected to the surface of the measuring seat, and the measuring end of the measuring gauge can abut against the surface of the lead screw to perform radial clearance measurement.

[0007] By adopting the above technical solution, when the clamping assembly clamps both ends of the lead screw axis and positions it on the base, the measuring seat slides along the lead screw axis on the base surface until the pressing rod faces the lead screw measuring surface, driving the pressing rod to rotate along the measuring seat towards the lead screw. The pressing rod surface presses against the lead screw surface to form a limit. At the same time, the measuring end of the measuring instrument measures the radial clearance of the lead screw surface, realizing the radial clearance measurement of the lead screw at various positions. Moreover, the measuring force can be adjusted according to the design requirements, thereby improving the accuracy of the radial clearance measurement of the lead screw.

[0008] Optionally, the measuring assembly further includes an adjusting nut and a handle. The adjusting nut is rotatably connected to the surface of the measuring seat. The axis of the adjusting nut coincides with the axis of the clamping rod. The outer circumferential surface of the clamping rod is provided with a threaded groove that meshes with the inner tooth surface of the adjusting nut. The end of the handle is connected to the surface of the adjusting nut. The adjusting nut is rotated by the handle, which causes the end face of the clamping rod to approach the surface of the lead screw.

[0009] By adopting the above technical solution, the handle provides the force application point. When it is necessary to control the clamping rod to press against the surface of the lead screw, the user holds the handle and drives the adjusting nut to rotate. The inner wall of the thread groove meshes with the inner tooth surface of the adjusting nut, which drives the clamping rod to rotate along the surface of the measuring seat towards the lead screw. The clamping rod surface presses against the surface of the lead screw, thereby improving the ease of use of the lead screw radial clearance measuring instrument.

[0010] Optionally, the measuring instrument is rotatably connected to the surface of the measuring base, and the rotation axis of the measuring base and the lead screw axis are parallel to each other.

[0011] By adopting the above technical solution, the rotation axis of the measuring instrument and the lead screw axis are parallel to each other, allowing the operator to adjust the orientation of the measuring instrument according to their own angle, without the need for the operator to adjust their own angle to read the measuring value, thereby further improving the ease of use of the lead screw radial clearance measuring instrument.

[0012] Optionally, the base surface is provided with multiple slide rails at intervals, the length direction of the slide rails is parallel to the lead screw axis, and the measuring seat surface is provided with multiple slide tracks for the slide rails to slide. When the measuring seat slides on the base surface, it drives the slide rails to slide on the inner wall of the slide tracks.

[0013] By adopting the above technical solution, when the driving measuring seat slides on the base surface, it drives the slide rail to slide on the inner wall of the slide, making it less likely for the measuring seat to deviate when sliding on the base surface, thereby improving the stability of the measuring seat sliding.

[0014] Optionally, the measuring seat surface is threaded with a fastening bolt, and the base surface is provided with a waist-shaped groove for the fastening bolt to slide. The length direction of the waist-shaped groove is parallel to the axis of the lead screw, and the end of the fastening bolt can be embedded in the waist-shaped groove and abut against the bottom wall of the waist-shaped groove to form a limit.

[0015] By adopting the above technical solution, when the end face of the clamping rod faces the measuring surface of the lead screw, the fastening bolt is driven to rotate. The end of the fastening bolt is embedded in the waist-shaped groove and abuts against the bottom wall of the waist-shaped groove to form a limit, thereby realizing the limit of the measuring seat on the base. This makes it less likely for the measuring instrument to deviate when measuring the radial clearance of the lead screw surface, thus improving the accuracy of the radial clearance measurement of the lead screw.

[0016] Optionally, the clamping assembly includes a fastening screw and a fixing rod. The base surface has a threaded hole for threaded connection of the fastening screw. The end of the fixing rod is connected to the base surface facing the fastening screw. A clamping gap is left between the fixing rod and the fastening screw for the screw to be inserted. The fixing rod surface and the fastening screw surface clamp the two ends of the screw in the axial direction to form a positioning.

[0017] By adopting the above technical solution, before measuring the radial clearance of the lead screw, the lead screw is embedded in the clamping gap, and one end of the lead screw in the axial direction abuts against the surface of the fixed rod to form a preliminary limit, driving the fastening lead screw to rotate, causing the fastening lead screw to slide along the axis of the threaded hole towards the lead screw, and the surface of the fastening lead screw abuts against the other end in the axial direction of the lead screw, so that the two ends in the axial direction of the lead screw are not easily deviated when measuring the radial clearance, thereby improving the accuracy of the radial clearance measurement of the lead screw.

[0018] Optionally, the end face of the fixing rod facing the clamping gap is provided with a guide surface, the guide surface is in the shape of a circular arc protrusion, and the guide surface can abut against the end face of the lead screw to form a limit.

[0019] By adopting the above technical solution, the guide surface is convex with an arc shape, which increases the contact area between the fixed rod and the lead screw, thereby improving the positioning firmness of the lead screw.

[0020] Optionally, the clamping assembly further includes a support rod, one end of which is connected to the base surface facing the fixed rod, and the other end of which has a support groove for the lead screw end face to be embedded. When one end of the lead screw in the axial direction abuts against the fixed rod surface, the other end of the lead screw in the axial direction is embedded in the support groove, and the inner wall of the support groove abuts against the lead screw surface to form support.

[0021] By adopting the above technical solution, when one end of the lead screw in the axial direction is pressed against the fixed rod surface, the other end of the lead screw in the axial direction is embedded in the support groove. The inner wall of the support groove abuts against the lead screw surface to form support. The user only needs to rotate the fastening lead screw to drive the fastening lead screw surface to press against the end of the lead screw in the axial direction to form a fixed position, thereby further improving the ease of use of the lead screw radial clearance measuring instrument.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The setting of measuring seat, clamping top rod and measuring gauge. The measuring end of the measuring gauge measures the radial clearance of the lead screw surface, realizing the radial clearance measurement of the lead screw at various positions. Moreover, the measuring force can be adjusted according to the design requirements, thereby improving the accuracy of the radial clearance measurement of the lead screw.

[0024] 2. The setting of adjusting nut and handle, the inner wall of thread groove meshes with the inner tooth surface of adjusting nut, driving the clamping rod to rotate along the surface of measuring seat towards the lead screw, the clamping rod surface presses against the lead screw surface, thereby improving the ease of use of lead screw radial clearance measuring instrument;

[0025] 3. The slide rail is designed to slide along the inner wall of the slide, making it less likely for the measuring seat to deviate when sliding on the base surface, thereby improving the stability of the measuring seat's sliding. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the overall structure in an embodiment of this application, mainly showing the support groove.

[0028] Explanation of reference numerals in the attached drawings: 1. Lead screw; 11. Rod section; 12. Outer ring; 2. Base; 21. Threaded hole; 22. Waist-shaped groove; 3. Clamping assembly; 31. Fastening lead screw; 32. Fixing rod; 321. Clamping gap; 322. Guide surface; 333. Support rod; 331. Support groove; 4. Measuring assembly; 41. Measuring seat; 411. Slide rail; 42. Pressing top rod; 43. Measuring gauge; 44. Adjusting nut; 45. Handle; 5. Slide rail; 6. Fastening bolt. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0030] This application discloses a radial clearance measuring instrument for lead screws. (Refer to...) Figure 1 and Figure 2 The lead screw 1 includes a rod portion 11 and an outer ring 12 threaded onto the outer circumferential surface of the lead screw 1. The lead screw radial clearance measuring instrument includes a base 2, a clamping assembly 3, and a measuring assembly 4. The clamping assembly 3 and the measuring assembly 4 are spaced apart and connected to the surface of the base 2. The clamping assembly 3 can clamp both ends of the rod portion 11 in the axial direction to form a positioning. The measuring assembly 4 can measure the radial clearance on the surface of the outer ring 12, thereby realizing the radial clearance measurement of the lead screw 1 at various positions. Moreover, the measuring force can be adjusted according to the design requirements, thereby improving the accuracy of the radial clearance measurement of the lead screw 1.

[0031] Reference Figure 1 and Figure 2The clamping assembly 3 includes a fastening screw 31, a fixing rod 32, and a support rod 333. A threaded hole 21 for threaded connection of the fastening screw 31 is provided on one side of the base 2 along its length. The axis of the threaded hole 21 is parallel to the length direction of the base 2. The threaded hole 21 penetrates the surface of the base 2 along its own axis and communicates with the inner cavity of the base 2. The end of the fastening screw 31 passes through the threaded hole 21 and faces the inner cavity of the base 2. The end of the fixing rod 32 is fixed to the inner wall of the base 2 facing the threaded hole 21. The axis of the fixing rod 32 coincides with the axis of the fastening screw 31. A clamping gap 321 is provided between the end faces of the screw 1 and the fastening screw 31 to accommodate the screw 1. The face of the fixing rod 32 and the face of the fastening screw 31 are respectively clamped at both ends of the rod part 11 in the axial direction to form a positioning. The end face of the fixing rod 32 facing the clamping gap 321 is provided with a guide surface 322. The guide surface 322 is in the shape of a circular arc protrusion. The guide surface 322 can abut against the end face of the rod part 11 to form a limit, increasing the contact area between the face of the fixing rod 32 and the end face of the rod part 11, thereby improving the positioning stability of the screw 1 in the clamping gap 321.

[0032] Reference Figure 1 and Figure 2 The end of the support rod 333 is connected to the inner wall of the base 2 facing the fixed rod 32. The axis of the support rod 333 and the axis of the fastening screw 31 are parallel to each other. The end face of the support rod 333 facing the clamping gap 321 is provided with a support groove 331 for the end of the rod 11 to be inserted. When the guide surface 322 abuts against the end face of the rod 11, the end of the rod 11 away from the fixed rod 32 is inserted into the support groove 331. The inner wall of the support groove 331 abuts against the surface of the rod 11 to form support. Tightening the fastening screw 31 drives the fastening screw 31 to approach the screw 1. The rod face of the fastening screw 31 and the rod face of the fixed rod 32 correspond one-to-one to clamp the two ends of the rod 11 in the axial direction to form positioning, thereby fixing the screw 1 on the base 2. When the outer ring 12 rotates around the axis of the rod 11, the rod 11 is not easy to deflect, thereby improving the accuracy of the radial clearance measurement of the screw 1.

[0033] Reference Figure 1 and Figure 2 The measuring component 4 includes a measuring seat 41, a clamping rod 42, a measuring gauge 43, an adjusting nut 44, and a handle 45. The measuring seat 41 is connected to the surface of the base 2 via a slide rail 411. The sliding direction of the measuring gauge 43 is parallel to the length direction of the base 2. Multiple slide rails 5 are fixed to the surface of the base 2 at intervals by bolts. The arrangement direction of the slide rails 5 is parallel to the width direction of the base 2, and the length direction of the slide rails 5 is parallel to the length direction of the base 2. Multiple slide rails 411 are provided at intervals on the surface of the base 2 for the slide rails 5 to slide. When the measuring seat 41 slides on the surface of the base 2, it drives the slide rails 5 to slide on the inner wall of the slide rails 411, making it less likely for the measuring seat 41 to deviate when sliding on the surface of the base 2, thereby improving the stability of the measuring seat 41 sliding on the surface of the base 2.

[0034] Reference Figure 1 and Figure 2 The measuring seat 41 is threadedly connected to a fastening bolt 6. The rotation axis of the fastening bolt 6 is parallel to the height direction of the base 2. The end of the fastening bolt 6 passes through the measuring seat 41 and faces the surface of the base 2. The surface of the base 2 facing the fastening bolt 6 has a waist-shaped groove 22 for the fastening bolt 6 to slide. The length direction of the waist-shaped groove 22 is parallel to the length direction of the base 2. The end of the fastening bolt 6 can be embedded in the waist-shaped groove 22 and abut against the bottom wall of the waist-shaped groove 22 to form a limit, thereby realizing the orientation limit of the measuring seat 41 on the surface of the base 2, and thus further improving the accuracy of radial clearance measurement of the lead screw 1.

[0035] Reference Figure 1 and Figure 2 The adjusting nut 44 is rotatably connected to the surface of the measuring seat 41 facing the clamping gap 321. One end of the clamping rod 42 is threadedly connected to the surface of the measuring seat 41 facing the inner ring of the adjusting nut 44. The other end of the clamping rod 42 coaxially passes through the inner ring of the adjusting nut 44 and abuts against the surface of the outer ring 12 inside the clamping gap 321. The outer circumferential surface of the clamping rod 42 has a threaded groove that meshes with the inner tooth surface of the adjusting nut 44. The end of the handle 45 is fixed to the surface of the adjusting nut 44 protruding from the measuring seat 41 by bolts. When it is necessary to press against the surface of the outer ring 12 inside the clamping gap 321, the handle 45 provides a force point. The adjusting nut 44 is driven to rotate by the handle 45, which drives the clamping rod 42 to rotate along the surface of the measuring seat 41 in the direction closer to the outer ring 12. The rod surface of the clamping rod 42 abuts against the surface of the outer ring 12 to form a limit.

[0036] Reference Figure 1 and Figure 2 The measuring instrument 43 is rotatably connected to the surface of the measuring base 41. The rotation axis of the measuring instrument 43 is parallel to the length direction of the base 2, allowing the operator to adjust the orientation of the measuring instrument 43 according to their own perspective. The measuring end of the measuring instrument 43 can abut against the surface of the outer ring 12 within the clamping gap 321 and perform radial clearance measurement.

[0037] The implementation principle of the radial clearance measuring instrument for lead screws in this application embodiment is as follows: When the lead screw 1 is measuring, the lead screw 1 is embedded in the clamping gap 321, the guide surface 322 abuts against the end face of the rod portion 11, and the end of the rod portion 11 away from the fixed rod 32 is embedded in the support groove 331. The inner wall of the support groove 331 abuts against the surface of the rod portion 11 to form support. Tightening the fastening lead screw 31 drives the fastening lead screw 31 closer to the lead screw 1. The rod surface of the fastening lead screw 31 and the rod surface of the fixed rod 32 correspond one-to-one with the two ends of the rod portion 11 in the axial direction to form positioning, driving the sliding seat to slide along the surface of the base 2. The clamping rod 42 faces the surface of the outer ring 12 within the clamping gap 321. The adjusting nut 44 is driven to rotate by the handle 45, which drives the clamping rod 42 to rotate along the surface of the measuring seat 41 towards the outer ring 12. The rod surface of the clamping rod 42 presses against the surface of the outer ring 12 to form a limit. At the same time, the measuring end of the measuring gauge 43 abuts against the surface of the outer ring 12 within the clamping gap 321 and performs radial clearance measurement. This realizes the radial clearance measurement of the lead screw 1 at various positions, and the measuring force can be adjusted according to the design requirements, thereby improving the accuracy of the radial clearance measurement of the lead screw 1.

[0038] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A radial clearance measuring instrument for lead screws, characterized in that: The device includes a base (2), a clamping assembly (3), and a measuring assembly (4). The clamping assembly (3) is connected to the base (2) and can clamp both ends of the lead screw (1) to form a positioning. The measuring assembly (4) includes a measuring seat (41), a pressing rod (42), and a measuring gauge (43). The measuring seat (41) is slidably connected to the surface of the base (2). The sliding direction of the measuring seat (41) is parallel to the axis of the lead screw (1). One end of the pressing rod (42) is threaded to the surface of the measuring seat (41) facing the lead screw (1). The other end of the pressing rod (42) can press against the surface of the lead screw (1) to form a limit. The measuring gauge (43) is connected to the surface of the measuring seat (41). The measuring end of the measuring gauge (43) can abut against the surface of the lead screw (1) and perform radial clearance measurement.

2. The radial clearance measuring instrument for lead screws according to claim 1, characterized in that: The measuring assembly (4) also includes an adjusting nut (44) and a handle (45). The adjusting nut (44) is rotatably connected to the surface of the measuring seat (41). The axis of the adjusting nut (44) coincides with the axis of the clamping rod (42). The outer circumferential surface of the clamping rod (42) is provided with a threaded groove that meshes with the inner tooth surface of the adjusting nut (44). The end of the handle (45) is connected to the surface of the adjusting nut (44). The adjusting nut (44) is driven to rotate by the handle (45), which drives the end face of the clamping rod (42) to approach the surface of the lead screw (1).

3. The radial clearance measuring instrument for lead screws according to claim 1, characterized in that: The measuring instrument (43) is rotatably connected to the surface of the measuring seat (41), and the rotation axis of the measuring seat (41) and the axis of the lead screw (1) are parallel to each other.

4. The radial clearance measuring instrument for lead screws according to claim 1, characterized in that: The base (2) has multiple slide rails (5) connected at intervals on its surface. The length direction of the slide rails (5) is parallel to the axis of the lead screw (1). The measuring seat (41) has multiple slide tracks (411) at intervals on its surface for the slide rails (5) to slide. When the measuring seat (41) slides on the surface of the base (2), it drives the slide rails (5) to slide on the inner wall of the slide track (411).

5. The radial clearance measuring instrument for lead screws according to claim 1, characterized in that: The measuring seat (41) has a threaded connection to a fastening bolt (6), and the base (2) has a waist-shaped groove (22) for the fastening bolt (6) to slide. The length direction of the waist-shaped groove (22) is parallel to the axis of the lead screw (1). The end of the fastening bolt (6) can be embedded in the waist-shaped groove (22) and abut against the bottom wall of the waist-shaped groove (22) to form a limit.

6. The radial clearance measuring instrument for lead screws according to claim 1, characterized in that: The clamping assembly (3) includes a fastening screw (31) and a fixing rod (32). The base (2) has a threaded hole (21) for threaded connection of the fastening screw (31). The end of the fixing rod (32) is connected to the surface of the base (2) facing the fastening screw (31). A clamping gap (321) is left between the fixing rod (32) and the fastening screw (31) for the screw (1) to be inserted. The fixing rod (32) and the fastening screw (31) clamp the two ends of the screw (1) in the axial direction to form a positioning.

7. The radial clearance measuring instrument for lead screws according to claim 6, characterized in that: The fixed rod (32) has a guide surface (322) on its end face facing the clamping gap (321). The guide surface (322) is in the shape of a circular arc protrusion. The guide surface (322) can abut against the end face of the lead screw (1) to form a limit.

8. The radial clearance measuring instrument for lead screws according to claim 6, characterized in that: The clamping assembly (3) also includes a support rod (333). One end of the support rod (333) is connected to the surface of the base (2) facing the fixed rod (32). The other end of the support rod (333) is provided with a support groove (331) for the end face of the lead screw (1) to be embedded. When one end of the lead screw (1) in the axial direction abuts against the rod surface of the fixed rod (32), the other end of the lead screw (1) in the axial direction is embedded in the support groove (331), and the inner wall of the support groove (331) abuts against the surface of the lead screw (1) to form support.

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