CN111121600A - Detection tool for detecting diameter of auxiliary screw nut raceway of ball screw for automobile - Google Patents
Detection tool for detecting diameter of auxiliary screw nut raceway of ball screw for automobile Download PDFInfo
- Publication number
- CN111121600A CN111121600A CN201911412179.0A CN201911412179A CN111121600A CN 111121600 A CN111121600 A CN 111121600A CN 201911412179 A CN201911412179 A CN 201911412179A CN 111121600 A CN111121600 A CN 111121600A
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- Prior art keywords
- measuring
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- ball
- measuring block
- diameter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
- G01B5/204—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures of screw-threads
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
- G01B5/201—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures for measuring roundness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a detection tool for detecting the diameter of a ball screw pair raceway for an automobile, which comprises: a gauge body; the fixed handle is arranged on the gauge body; the lower measuring block is fixed on the checking fixture body; the linear guide rail is arranged on the checking fixture body; the upper measuring block and the movable handle are arranged on the sliding block of the linear guide rail, and the at least one return spring is arranged between the upper measuring block and the lower measuring block; and the measuring point of the dial indicator is in contact with the upper measuring block. The use method of the invention comprises the following steps: the movable handle is pressed downwards, the upper measuring block moves downwards, and the upper measuring block and the lower measuring block are combined. The whole measuring head part is put into an inner hole of the nut, the lower measuring ball of the lower measuring block moves to the center position of the corresponding channel, and the movable handle is loosened to enable the upper measuring ball of the upper measuring block to contact the raceway. The invention can quickly measure the diameter and the outline of the nut raceway and has the advantages of accurate measurement, simple operation, convenience, quickness, lower cost and the like.
Description
Technical Field
The invention relates to the technical field of ball screw detection, in particular to a detection tool for detecting the diameter of a raceway of a ball screw pair for an automobile, which is used for detecting the diameter of the raceway of a nut in the ball screw pair.
Background
At present, more and more products focus on high efficiency of performance, and good performance requires reliable precision as a support. In order to realize batch grinding of nuts in the ball screw pair for the automobile, how to realize rapid and accurate detection becomes a big problem in China at present.
As shown in fig. 1 and 2, a groove 2 of a nut 1 of a ball screw pair for an automobile is an internal thread, a plurality of grooves 2 are distributed along a spiral line, and the measurement of the diameter of the groove 2 cannot be realized by a measuring ball 3 in a common groove diameter gauge. At present, for the inspection of the diameter of the channel 2 of the screw 1, the three-coordinate measurement is generally used domestically, a three-coordinate probe with a specific size is customized according to the requirement of a drawing to scan the outline of the channel 2, the outline of a spiral raceway is generated, and an outline model is measured through measurement software.
Disclosure of Invention
The invention aims to solve the technical problem of providing a quick and high-precision gauge for detecting the diameter of a ball screw pair nut raceway for an automobile aiming at the technical problem of the diameter detection of the existing ball screw pair nut raceway, and the gauge is invented according to the actual production process.
The technical problem to be solved by the invention can be realized by the following technical scheme:
a examine utensil that is used for vice raceway diameter of ball screw to detect for car includes:
a gauge body;
the fixed handle is arranged on the gauge body;
the lower measuring block and the fixed handle are positioned on the left side and the right side of the checking fixture body, a plurality of lower protruding thread lines consistent with the thread pitch of the internal thread of the channel of the screw nut to be measured are arranged on the lower measuring block, the radius of the plurality of lower protruding thread lines is smaller than the radius of the channel of the screw nut to be measured and the radius of the steel ball, two lower measuring balls are respectively arranged on the first lower protruding thread line and the last lower protruding thread line, and the diameters of the four lower measuring balls are designed according to drawing measuring balls;
the linear guide rail is arranged on the checking fixture body;
the upper measuring block and the movable handle are arranged on the sliding block of the linear guide rail, and the lower measuring block and the movable handle are positioned on the left side and the right side of the lower measuring block; an upper convex thread line is arranged in the middle of the upper measuring block, the radius of the upper convex thread line is smaller than that of a channel and a steel ball of a nut to be measured, an upper measuring ball is arranged on the upper convex thread line, and the diameter of the upper measuring ball is designed according to a drawing measuring ball;
at least one reset spring arranged between the upper measuring block and the lower measuring block;
and the measuring point of the dial indicator is in contact with the upper measuring block.
In a preferred embodiment of the present invention, a limit screw is disposed on the checking fixture body, and the limit screw defines a limit position of the upper measuring block away from the lower measuring block.
In a preferred embodiment of the present invention, at least one guide post is disposed on the upper block, and at least one guide hole is disposed on the lower block, and the guide post is inserted into the corresponding guide hole.
In a preferred embodiment of the invention, the return spring is sleeved on the corresponding guide post.
In a preferred embodiment of the invention, the lower ball is in clearance fit with the lower raised thread and the upper ball is in clearance fit with the upper raised thread.
By adopting the technical scheme, the invention can quickly measure the diameter and the outline of the nut raceway and has the advantages of accurate measurement, simple operation, convenience, rapidness, lower cost and the like. The invention has great significance for the production of the small ball screw for the automobile.
Drawings
Fig. 1 is a schematic structural view of a conventional nut.
Fig. 2 is a schematic view showing a measuring ball in a conventional groove diameter gauge measuring a raceway of a nut.
FIG. 3 is a schematic structural diagram of the detection tool for detecting the diameter of the ball screw pair raceway for the automobile.
FIG. 4 is an exploded schematic view of the gauge for detecting the diameter of the ball screw pair raceway for an automobile according to the invention.
Detailed Description
The invention is further described below in conjunction with the appended drawings and detailed description.
Referring to fig. 3 and 4, the gauge for detecting the diameter of the ball screw pair raceway for the automobile includes a gauge body 50, a measuring head portion and a dial indicator 10, and the dial indicator 10 may be a digital display dial indicator.
The measuring head part of the gauge comprises an upper measuring block 60 and a lower measuring block 70, the lower measuring block 70 is fixed on a gauge body 50, a fixed handle 30 is further fixed on the gauge body 50, and the lower measuring block 70 and the fixed handle 30 are located on the left side and the right side of the gauge body 50.
The linear guide rail 51 is installed on the checking fixture body 50, the upper measuring block 60 and the movable handle 20 are assembled together and installed on the sliding block of the linear guide rail 51, so that the upper measuring block 60 and the movable handle 20 can move up and down along the linear guide rail 51. This allows the upper block 60 to move flexibly along the linear guide 51, and the movement accuracy is also high. A limiting screw 40 is mounted on the checking fixture body 50, and the limiting screw 40 limits the limit position of the upper measuring block 60 far away from the lower measuring block 70.
Four lower convex spiral lines 71, 72, 73 and 74 which are consistent with the thread pitch of the internal thread of the channel of the nut 1 to be measured are distributed on the lower measuring block 70, and the radiuses of the four lower convex spiral lines 71, 72, 73 and 74 are smaller than the radiuses of the channel 2 of the nut 1 and the steel ball. Two lower measuring balls 71a and 74a are respectively distributed on the first lower convex spiral line 71 and the fourth lower convex spiral line 74, and the diameters of the four lower measuring balls 71a and 74a are designed according to a drawing measuring ball. The four lower balls 71a, 74a are first positioned at the bottom of the groove 2 on the side of the internal thread of the nut 2 when measuring.
An upper convex spiral line 61 which is consistent with the thread pitch of the internal thread of the channel of the screw nut 1 to be measured is distributed in the middle of the upper measuring block 60, and the upper convex spiral line 61 is located in the middle of the four lower convex spiral lines 71, 72, 73 and 74. The radius of the lower convex spiral line 61 is also smaller than the radius of the channel 2 and the steel ball of the nut 1. The lower measuring ball 61a is arranged on the lower convex spiral line 61, the lower measuring ball 61a is contacted with the bottom of the groove 2 on the other side of the internal thread of the screw 1 during measurement, the whole screw 1 can be stably clamped on the upper measuring block 60 and the lower measuring block 70 of the invention through the four upper measuring balls 71a and 74a and the lower measuring ball 61a, and the phenomenon that the measurement result is inaccurate due to the inclination of the screw 1 can not occur.
Because the screw 1 is finished by grinding a plurality of devices in parallel, the distances of the channels 2 of all the screw 1 have small differences, in order to avoid inaccurate measurement results caused by the differences of the distances of the channels 2 of the parts, two lower measuring balls 71a are in clearance fit with the first lower convex spiral line 71, two lower measuring balls 74a are in clearance fit with the fourth lower convex spiral line 74, and an upper measuring ball 61a is in clearance fit with the upper convex spiral line 61, so that the four upper measuring balls 71a and 74a and the lower measuring ball 61a can have certain movement, the four upper measuring balls 71a and 74a and the lower measuring ball 61a can contact the bottoms of the three channels 2, and the accuracy of the channel diameter measurement results is ensured; and the four upper measuring balls 71a and 74a and the lower measuring ball 61a can flexibly rotate, the gauge can read the groove diameter deviation of any position of the screw 1 by rotating the measuring piece screw 1 in the measuring process, and accordingly the ovality of the channel 2 in the screw 1 is measured.
Two guide posts 62 are arranged on the upper measuring block 60, two guide post holes are also arranged on the lower measuring block 70, the two guide posts 62 are inserted into the corresponding guide post holes, a return spring 80 is respectively sleeved on the two guide posts 62, when acting force is not applied to the movable handle 20, the whole upper measuring block 60 is supported at a constant position by the return spring 80, when a part is measured, the movable handle 20 is held by a hand, the whole upper measuring block 60 moves downwards along the linear guide rail 51, the return spring 80 is compressed at the same time until the upper measuring block 60 is contacted with the lower measuring block 70, the screw 1 to be measured can be arranged on the upper measuring block 60 and the lower measuring block 70, the movable handle 20 is released after the four lower measuring balls 71a and 74a on the lower measuring block 70 are positioned, and the upper measuring block 60 can be moved by the return spring 80 until the upper measuring ball 61a on the upper measuring block 60 is contacted with the upper groove bottom of the channel 2 of the screw 1 to be measured.
The dial indicator 10 is installed on the gauge body 50, and a measuring point 11 of the dial indicator 10 is in contact with the upper measuring block 60. Meanwhile, due to the fact that the groove diameters of the grooves 2 are different in size and the pressure of a measuring point is different, the difference value between the testing nut 1 and the standard part is directly read through the dial indicator 10, and therefore the groove diameter measurement of the grooves 2 in the nut 1 is completed.
The use method of the invention comprises the following steps:
the movable handle 20 is pushed down and the upper block 60 moves down, so that the upper block 60 and the lower block 70 are combined. The whole measuring head part is put into the inner hole of the nut 1, the lower measuring balls 71a and 74a of the lower measuring block 70 move to the central position corresponding to the channel 2, and the movable handle 20 is released, so that the upper measuring ball 61a of the upper measuring block 60 contacts the raceway.
Claims (5)
1. The utility model provides an examine utensil that is used for vice raceway diameter of ball screw to detect for car which characterized in that includes:
a gauge body;
the fixed handle is arranged on the gauge body;
the lower measuring block and the fixed handle are positioned on the left side and the right side of the checking fixture body, a plurality of lower protruding thread lines consistent with the thread pitch of the internal thread of the channel of the screw nut to be measured are arranged on the lower measuring block, the radius of the plurality of lower protruding thread lines is smaller than the radius of the channel of the screw nut to be measured and the radius of the steel ball, two lower measuring balls are respectively arranged on the first lower protruding thread line and the last lower protruding thread line, and the diameters of the four lower measuring balls are designed according to drawing measuring balls;
the linear guide rail is arranged on the checking fixture body;
the upper measuring block and the movable handle are arranged on the sliding block of the linear guide rail, and the lower measuring block and the movable handle are positioned on the left side and the right side of the lower measuring block; an upper convex thread line is arranged in the middle of the upper measuring block, the radius of the upper convex thread line is smaller than that of a channel and a steel ball of a nut to be measured, an upper measuring ball is arranged on the upper convex thread line, and the diameter of the upper measuring ball is designed according to a drawing measuring ball;
at least one reset spring arranged between the upper measuring block and the lower measuring block;
and the measuring point of the dial indicator is in contact with the upper measuring block.
2. The checking fixture for detecting the diameter of the ball screw pair raceway for the automobile as claimed in claim 1, wherein a limit screw is provided on said checking fixture body, said limit screw defining a limit position of said upper block away from said lower block.
3. The checking fixture for detecting the diameter of the ball screw pair raceway for the automobile according to claim 1 or 2, wherein at least one guide post is provided on the upper block, and at least one guide hole is provided on the lower block, and the guide post is inserted into the corresponding guide hole.
4. The checking fixture for detecting the diameter of the ball screw pair raceway for the automobile according to claim 3, wherein the return spring is sleeved on the corresponding guide post.
5. The testing fixture for detecting the diameter of the ball screw pair raceway for the automobile according to claim 1 or 2, characterized in that the lower ball is in clearance fit with the lower raised thread, and the upper ball is in clearance fit with the upper raised thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911412179.0A CN111121600A (en) | 2019-12-31 | 2019-12-31 | Detection tool for detecting diameter of auxiliary screw nut raceway of ball screw for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911412179.0A CN111121600A (en) | 2019-12-31 | 2019-12-31 | Detection tool for detecting diameter of auxiliary screw nut raceway of ball screw for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111121600A true CN111121600A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911412179.0A Pending CN111121600A (en) | 2019-12-31 | 2019-12-31 | Detection tool for detecting diameter of auxiliary screw nut raceway of ball screw for automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111121600A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834412A (en) * | 2020-06-08 | 2021-12-24 | 长春市春求科技开发有限公司 | Symmetry degree gauge and method for detecting symmetry degree of key groove |
| CN113983906A (en) * | 2021-04-23 | 2022-01-28 | 上汽大众汽车有限公司 | Hole roundness measuring device |
-
2019
- 2019-12-31 CN CN201911412179.0A patent/CN111121600A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834412A (en) * | 2020-06-08 | 2021-12-24 | 长春市春求科技开发有限公司 | Symmetry degree gauge and method for detecting symmetry degree of key groove |
| CN113983906A (en) * | 2021-04-23 | 2022-01-28 | 上汽大众汽车有限公司 | Hole roundness measuring device |
| CN113983906B (en) * | 2021-04-23 | 2023-09-22 | 上汽大众汽车有限公司 | Hole roundness measuring device |
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