Device for measuring bounce of ball screw through magnetic railing ruler

Abstract

The utility model belongs to the technical field of precision detection, and discloses a device for measuring ball screw runout through a magnetic railing ruler, which comprises a supporting assembly, a measuring assembly and a digital display assembly, a screw is horizontally arranged on the supporting assembly, the measuring assembly is arranged on the supporting assembly and measures radial runout data of the screw through magnetoelectric conversion, and the digital display assembly is arranged on the supporting assembly. The measuring assembly is connected to the digital display assembly, and the digital display assembly is used for processing the electric signals transmitted by the measuring assembly and processing data into visual data; the device is simple in structure and suitable for lead screws with different diameters, numerical values can be accurately read through the magnetic railing ruler digital display device, the measuring head is arranged to be attached to the outer circle of the lead screw, the measuring error caused by incompact contact between the measuring head and the outer circle of the lead screw is eliminated, and the measuring precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of precision detection, in particular to a device for measuring ball screw runout with a magnetic scale. Background Art

[0002] As a rolling functional component of high-precision linear transmission of machine tools, the manufacturing accuracy of ball screw pairs directly affects the overall positioning accuracy of machine tools. Precision testing of manufactured ball screw pairs is also the focus of attention of various ball screw pair manufacturers. The radial runout of ball screws is an important technical parameter in testing. The radial runout of ball screws refers to the deviation caused by the axial or radial movement of ball screws under load. This movement will not only reduce the accuracy of the machine, but also damage the service life of the ball screw.

[0003] In the prior art, the radial runout detection of the ball screw is generally carried out on a runout meter, where a double center is used to support the center holes at both ends of the ball screw, and the outer diameter of the screw is tested for runout using a dial indicator probe. However, on the one hand, the values ​​read by the naked eye are not particularly accurate. On the other hand, screws of different diameters require adjustment of the dial indicator to ensure that the runout is within the measuring range to prevent damage to the probe. In addition, the outer circle of the screw is a thread, and the probe of the dial indicator cannot fit tightly against the outer circle of the screw, affecting the measurement accuracy. Utility Model Content

[0004] The utility model aims to provide a device for measuring ball screw runout by using a magnetic scale, which has high measuring accuracy.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A device for measuring ball screw runout using a magnetic scale, comprising:

[0007] A support assembly, wherein the lead screw is horizontally disposed on the support assembly;

[0008] A measuring assembly, wherein the measuring assembly comprises a support seat, a lever, a magnetic grating strip, a probe and a magnetic grating reader, the support seat comprises a support member and a sector member, the support member is mounted on the support assembly, and the top of the support member is connected to the sector member, the magnetic grating strip extends from one end of the circular arc end of the sector member to the other end, the lever is rotatably connected to the center end of the sector member through a rotating shaft, the cross section of the lead screw is parallel to the rotating surface of the lever, the probe is connected to one end of the lever and fits the lead screw, the magnetic grating reader is connected to the other end of the lever and is aligned with the magnetic grating strip, and the straight-line distance from the rotating shaft to the probe is smaller than the straight-line distance from the rotating shaft to the magnetic grating reader;

[0009] A digital display component, wherein the magnetic grating reader is electrically connected to the digital display component, and the digital display component is configured to process the electrical signal transmitted by the magnetic grating reader.

[0010] Preferably, the upper surface of the probe is an arc surface.

[0011] Preferably, the measuring component also includes a straight pin, a first bearing and a limit block, one end of the straight pin is inserted into one end of the lever, the first bearing is sleeved on the straight pin, the probe is sleeved on the first bearing, a notch is provided at the bottom of the probe, the limit block is installed at one end of the lever and at least part of the limit block extends into the notch, and the size of the notch is larger than the size of the limit block.

[0012] Preferably, the straight-line distance from the rotating shaft to the magnetic grating reading head is equal to twice the straight-line distance from the rotating shaft to the measuring head.

[0013] Preferably, the support assembly includes a first bracket and a second bracket arranged opposite to each other, the top of the first bracket and the second bracket are both provided with a V-shaped groove, the bottoms of the two V-shaped grooves are located on the same horizontal line, and the two ends of the lead screw are respectively placed in the two V-shaped grooves.

[0014] Preferably, the support assembly includes a first plug and a second plug arranged opposite to each other, the top of the first plug and the top of the second plug are opposite to each other and located on the same horizontal line, and the top of the first plug and the top of the second plug respectively support the center holes at both ends of the screw.

[0015] Preferably, an arc-shaped groove is provided at the arc end of the sector-shaped member, the arc-shaped groove extends from one end to the other end of the arc end, and the magnetic grid bar is installed at the bottom of the arc-shaped groove.

[0016] Preferably, the measuring component also includes a ball-end screw, two of which are respectively installed at the top and bottom of the arc end of the fan-shaped member, and the elastic end of the ball-end screw is close to the lever, and at least part of the projection of the elastic end of the ball-end screw on the horizontal plane falls on the lever.

[0017] Preferably, the rotating shaft includes a first connecting portion and a second connecting portion, the first connecting portion is close to the lever, and a cross-sectional dimension thereof is larger than a cross-sectional dimension of the second connecting portion.

[0018] Preferably, the measuring assembly also includes a second bearing, a bearing end cover, a lock nut and a spacer sleeve, the second bearing is sleeved on the second connecting part and abuts against the end face of the first connecting part, two bearing end covers are provided and an annular ring is provided at one end of the bearing end cover, one of the bearing end covers is sleeved on the first connecting part, and its annular ring circumferentially abuts against one end of the second bearing, the other bearing end cover is sleeved on the second connecting part, the spacer sleeve is clamped between the bearing end cover and the second connecting part, and the length of the spacer sleeve is greater than the length of the bearing end cover, the outer wall of the annular ring of the bearing end cover protrudes from the outer wall of the second bearing, the fan-shaped piece is sleeved on the annular rings of the two bearing end covers, the lock nut is screwed to one end of the second connecting part away from the first connecting part and circumferentially abuts against the spacer sleeve.

[0019] Beneficial effects of the utility model: a magnetic scale ball screw runout measurement device provided by the utility model comprises a support assembly, a measuring assembly and a digital display assembly, wherein the screw is horizontally placed on the support assembly, the measuring assembly is arranged and installed on the support assembly, and measures the radial runout data of the screw through magneto-electric conversion, the measuring assembly is connected to the digital display assembly, and the digital display assembly is used to process the electrical signal transmitted by the measuring assembly and process the data into intuitive data. The utility model is suitable for screws of different diameters, and through the magnetic scale digital display device, the numerical value can be accurately read, and by arranging the probe to fit the outer circle of the screw, the measurement error caused by the false contact between the probe and the outer circle of the screw is eliminated, thereby improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a device for measuring ball screw runout with a magnetic scale provided by an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the measurement assembly provided by the embodiment of the utility model;

[0022] Figure 3 is a cross-sectional view of a measurement assembly provided by an embodiment of the utility model;

[0023] Figure 4 This is a partial structural diagram of the measurement component provided by the embodiment of the utility model Figure 1 ;

[0024] Figure 5 It is a schematic diagram of the structure of the probe provided by the embodiment of the utility model.

[0025] In the figure:

[0026] 100, lead screw;

[0027] 11. Platform; 12. First bracket; 13. Second bracket; 21. Support member; 22. Fan-shaped member; 23. Magnetic grating strip; 24. Lever; 25. Probe; 251. Notch; 26. Magnetic grating reader; 27. Rotating shaft; 28. Bearing end cover; 29. ​​Second bearing; a. Lock nut; b. Spacer; c. Ball screw; d. Direct sales; e. First bearing; f. Limit block; 3. Digital display assembly. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] This embodiment provides a device for measuring ball screw runout using a magnetic scale, which has high measurement accuracy.

[0033] Specifically, see Figure 1-Figure 5 A device for measuring ball screw runout with a magnetic scale includes a support component, a measuring component and a digital display component 3, wherein the screw 100 is horizontally placed on the support component, the measuring component is arranged and installed on the support component, and the radial runout data of the screw 100 is measured by magneto-electric conversion, the measuring component is connected to the digital display component 3, and the digital display component 3 is used to process the electrical signal transmitted by the measuring component and process the data into intuitive data.

[0034] Optionally, the digital display component 3 uses a data visualization dial, which is a commonly used device in the prior art, and its specific structure and principle are not described in detail here.

[0035] Preferably, the supporting assembly includes a platform 11 , and the measuring assembly and the digital display assembly 3 are both installed on the platform 11 .

[0036] For further information, see Figure 1 In this embodiment, the support assembly also includes a first bracket 12 and a second bracket 13. Specifically, the first bracket 12 and the second bracket 13 are arranged opposite to each other and are both installed on the platform 11. The tops of the first bracket 12 and the second bracket 13 are both provided with V-shaped grooves, and the bottoms of the two V-shaped grooves are located on the same horizontal line, that is, the first bracket 12 and the second bracket 13 have the same structure, and the two ends of the lead screw 100 are respectively placed in the two V-shaped grooves to realize the horizontal setting of the lead screw 100, which plays a limiting role on the lead screw 100 to prevent the lead screw 100 from shaking during the detection process and affecting the accuracy of the data.

[0037] In other feasible embodiments, the support assembly includes a first jack and a second jack that are arranged opposite to each other, and the first jack and the second jack are respectively arranged on two support rods installed on the platform 11, and the top of the first jack and the top of the second jack are opposite to each other and are located on the same horizontal line. The top of the first jack and the top of the second jack respectively support the center holes at both ends of the screw 100, which can also ensure the horizontal setting of the screw 100 and at the same time limit the screw 100 to prevent the screw 100 from shaking during the detection process and affecting the accuracy of the data.

[0038] The measuring assembly includes a support base and a magnetic grating strip 23. Specifically, the support base is arranged between the first bracket 12 and the second bracket 13, and the support base includes a support member 21 and a fan-shaped member 22. The support member 21 is installed on the support assembly, and the top of the support member 21 is connected to the fan-shaped member 22. For example, the bottom of the support member 21 is installed on the platform 11, and the top of the support member 21 is connected to the side of the fan-shaped member 22. Further, the magnetic grating strip 23 is arranged at the arc end of the fan-shaped member 22, specifically, extending from one end of the arc end of the fan-shaped member 22 to the other end.

[0039] Preferably, an arcuate groove is provided at the arc end of the sector 22, the groove depth of the arcuate groove is consistent, and the arcuate groove extends from one end of the arc end to the other end. Fittingly, the magnetic grid bar 23 is installed at the bottom of the arcuate groove.

[0040] Furthermore, the measuring assembly also includes a lever 24, a probe 25 and a magnetic grating reader 26. The lever 24 is rotatably connected to the center end of the fan-shaped member 22 through a rotating shaft 27. The probe 25 is connected to one end of the lever 24 and fits the outer circle of the screw 100. The magnetic grating reader 26 is connected to the other end of the lever 24. In this embodiment, the cross-section of the screw 100 is parallel to the rotating surface of the lever 24 to ensure that the magnetic grating reader 26 is always aligned with the magnetic grating bar 23 during the rotation of the lever 24.

[0041] In this embodiment, the upper surface of the probe 25, i.e., the contact surface between the probe 25 and the lead screw 100, is an arc surface, which increases the fit with the outer circumference of the lead screw 100 and eliminates the measurement error caused by the false contact between the probe 25 and the outer circumference of the lead screw 100.

[0042] Preferably, the sector 22 comprises a connected handle and a sector, the handle is connected to the center end of the sector, and the rotating shaft 27 is inserted into the handle.

[0043] For example, the magnetic grating reader 26 is electrically connected to the digital display assembly 3 , and the magnetic grating reader 26 is aligned with different positions of the magnetic grating strip 23 , and the digital display assembly 3 will display corresponding rotation data.

[0044] It should be noted that the straight-line distance from the rotating shaft 27 to the probe 25 is smaller than the straight-line distance from the rotating shaft 27 to the magnetic grating reader 26 to ensure that under the action of gravity, the lever 24 always keeps the probe 25 in an upturned state and fits the outer circle of the lead screw 100 .

[0045] In this embodiment, the straight-line distance from the rotating shaft 27 to the magnetic grating reader 26 is set to be equal to twice the straight-line distance from the rotating shaft 27 to the probe 25. On the one hand, half of the difference between the maximum value and the minimum value of the data displayed by the digital display component 3 is the radial runout value of the screw 100. On the other hand, the error is reduced by the numerical amplification method, thereby further improving the data accuracy.

[0046] This embodiment provides a rotating structure in which a lever 24 is rotatably connected to a sector 22 via a rotating shaft 27. For details, see Figure 2 and Figure 3, the rotating shaft 27 is convex, that is, the end of the rotating shaft 27 close to the lever 24 is the first connecting part, the end away from the lever 24 is the second connecting part, and the cross-sectional size of the first connecting part is greater than the cross-sectional size of the second connecting part. Further, the measuring assembly also includes a bearing end cover 28, a second bearing 29 and a lock nut a, the second bearing 29 is sleeved on the second connecting part and abuts against the end surface of the first connecting part, two bearing end covers 28 are provided, and an annular ring is provided at one end of the bearing end cover 28, one of the bearing end covers 28 is sleeved on the first connecting part, and its annular ring circumferentially abuts against one end of the second bearing 29, the other bearing end cover 28 is sleeved on the second connecting part, and a spacer b is sandwiched between it and the second connecting part, and one end of the one bearing end cover 28 and one end of the spacer b are both circumferentially abutted against the other end of the second bearing 29. Preferably, the length of the spacer b is greater than the length of the bearing end cover 28, the outer wall of the annular ring of the bearing end cover 28 protrudes from the outer wall of the second bearing 29, and the sector 22 is sleeved on the annular rings of the two bearing end covers 28. Further preferably, an end of the second connecting portion away from the first connecting portion is provided with an external thread, and the lock nut a is screwed on the external thread and circumferentially abuts against the other end of the spacer b to prevent the rotating shaft 27 from falling off.

[0047] Through the above structure, the rotating shaft 27 can rotate in the second bearing 29, and the lever 24 is rotatably connected to the first connecting portion, thereby improving the flexibility of the rotation of the lever 24.

[0048] Furthermore, the measuring assembly further includes a ball screw c. In this embodiment, two ball screws c are provided. The two ball screws c are respectively installed at the top and bottom of the arc end of the sector 22. Figure 2 , the ball screw c is installed on the side of the sector 22 close to the lever 24, and the elastic end of the ball screw c is close to the lever 24, and at least part of the projection of the elastic end of the ball screw c on the horizontal plane falls on the lever 24. Through the above arrangement, the rotation range of the lever 24 around the rotating shaft 27 is limited, but in the case that the radial runout value of the lead screw 100 is too large, the lever 24 applies pressure to the ball screw c, forcing the elastic end to retract, and the lever 24 can rotate over the ball screw c, preventing the probe 25 from being crushed by the lead screw 100, thereby improving safety.

[0049] Preferably, see Figure 4 and Figure 5The measuring assembly also includes a straight pin d, a first bearing e and a limit block f, wherein one end of the straight pin d is inserted into one end of the lever 24, the first bearing e is sleeved on the straight pin d, and the probe 25 is sleeved on the first bearing e. Further, a notch 251 is provided at the bottom of the probe 25, the limit block f is installed at one end of the lever 24 and at least part of the limit block f extends into the notch 251, the size of the notch 251 is larger than the size of the limit block f, and the probe 25 can be rotated through the first bearing e, and its rotation range is limited under the cooperation of the notch 251 and the limit block f. By providing the first bearing e and the notch 251, the probe 25 can rotate within a certain range, further improving the fit between the probe 25 and the outer circle of the lead screw 100, and eliminating the measurement error caused by the false contact between the probe 25 and the outer circle of the lead screw 100.

[0050] The magnetic scale device for measuring ball screw runout provided in this embodiment is suitable for screws 100 of different diameters, and the numerical value can be accurately read through the magnetic scale digital display device. By setting the probe 25 to fit the outer circle of the screw 100, the measurement error caused by the false contact between the probe 25 and the outer circle of the screw 100 is eliminated, thereby improving the measurement accuracy.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A device for measuring ball screw runout using a magnetic scale, characterized in that: include: A support assembly, wherein the lead screw (100) is horizontally placed on the support assembly; A measuring assembly, the measuring assembly comprising a support seat, a lever (24), a magnetic grating strip (23), a probe (25) and a magnetic grating reader (26), the support seat comprising a support member (21) and a fan-shaped member (22), the support member (21) being mounted on the support assembly, and the top of the support member (21) being connected to the fan-shaped member (22), the magnetic grating strip (23) extending from one end of the circular arc end of the fan-shaped member (22) to the other end, the lever (24) being connected to the fan-shaped member (22) by a rotating shaft (27) The lead screw (100) is connected to the center end of the sector (22); the cross section of the lead screw (100) is parallel to the rotation surface of the lever (24); the probe (25) is connected to one end of the lever (24) and is attached to the lead screw (100); the magnetic grating reader (26) is connected to the other end of the lever (24) and is aligned with the magnetic grating strip (23); and the straight-line distance from the rotating shaft (27) to the probe (25) is smaller than the straight-line distance from the rotating shaft (27) to the magnetic grating reader (26); A digital display component (3), the magnetic grating reader (26) is electrically connected to the digital display component (3), and the digital display component (3) is configured to process the electrical signal transmitted by the magnetic grating reader (26).

2. A device for measuring ball screw runout using a magnetic scale according to claim 1, characterized in that: The upper surface of the measuring head (25) is an arc surface.

3. The device for measuring ball screw runout using a magnetic scale according to claim 1, characterized in that: The measuring assembly further comprises a straight pin (d), a first bearing (e) and a limit block (f); one end of the straight pin (d) is inserted into one end of the lever (24); the first bearing (e) is sleeved on the straight pin (d); the measuring head (25) is sleeved on the first bearing (e); a notch (251) is provided at the bottom of the measuring head (25); the limit block (f) is mounted on one end of the lever (24) and at least a portion of the limit block (f) extends into the notch (251); and the size of the notch (251) is larger than the size of the limit block (f).

4. The device for measuring ball screw runout using a magnetic scale according to claim 1, characterized in that: The straight-line distance from the rotating shaft (27) to the magnetic grating reader (26) is equal to twice the straight-line distance from the rotating shaft (27) to the measuring head (25).

5. The device for measuring ball screw runout using a magnetic scale according to claim 1, characterized in that: The support assembly comprises a first bracket (12) and a second bracket (13) arranged opposite to each other, the tops of the first bracket (12) and the second bracket (13) are both provided with V-shaped grooves, the bottoms of the two V-shaped grooves are located on the same horizontal line, and the two ends of the lead screw (100) are respectively placed in the two V-shaped grooves.

6. The device for measuring ball screw runout using a magnetic scale according to claim 1, characterized in that: The support assembly comprises a first plug and a second plug which are arranged opposite to each other, the top of the first plug and the top of the second plug are opposite to each other and are located on the same horizontal line, and the top of the first plug and the top of the second plug respectively support the center holes at both ends of the lead screw (100).

7. The device for measuring ball screw runout using a magnetic scale according to claim 1, characterized in that: An arcuate groove is provided at the arc end of the sector-shaped member (22), the arcuate groove extending from one end of the arc end to the other end, and the magnetic grid bar (23) is installed at the bottom of the arcuate groove.

8. The device for measuring ball screw runout using a magnetic scale according to claim 1, characterized in that: The measuring component also includes a ball screw (c), two of which are respectively installed at the top and bottom of the arc end of the fan-shaped component (22), and the elastic end of the ball screw (c) is close to the lever (24), and at least part of the projection of the elastic end of the ball screw (c) on the horizontal plane falls on the lever (24).

9. The device for measuring ball screw runout using a magnetic scale according to claim 1, characterized in that: The rotating shaft (27) comprises a first connecting portion and a second connecting portion, wherein the first connecting portion is close to the lever (24) and has a cross-sectional dimension greater than that of the second connecting portion.

10. A device for measuring ball screw runout using a magnetic scale according to claim 9, characterized in that: The measuring assembly further comprises a second bearing (29), a bearing end cover (28), a lock nut (a) and a spacer (b), wherein the second bearing (29) is sleeved on the second connecting portion and abuts against the end surface of the first connecting portion, the bearing end cover (28) is provided with two and one end of the bearing end cover (28) is provided with an annular ring, one of the bearing end covers (28) is sleeved on the first connecting portion, and the annular ring thereof circumferentially abuts against one end of the second bearing (29), and the other bearing end cover (28) is sleeved on the first connecting portion. The second connecting portion, the spacer sleeve (b) is clamped between the bearing end cover (28) and the second connecting portion, and the length of the spacer sleeve (b) is greater than the length of the bearing end cover (28), the outer wall of the annular ring of the bearing end cover (28) protrudes from the outer wall of the second bearing (29), the fan-shaped member (22) is sleeved on the annular rings of the two bearing end covers (28), and the lock nut (a) is screwed to one end of the second connecting portion away from the first connecting portion and circumferentially abuts against the spacer sleeve (b).

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