CN110836625A - Cantilever type length high-precision length measuring device - Google Patents
Cantilever type length high-precision length measuring device Download PDFInfo
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- CN110836625A CN110836625A CN201911317322.8A CN201911317322A CN110836625A CN 110836625 A CN110836625 A CN 110836625A CN 201911317322 A CN201911317322 A CN 201911317322A CN 110836625 A CN110836625 A CN 110836625A
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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
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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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a cantilever type length high-precision length measuring device which comprises a measuring head, wherein a first boss extending outwards is arranged on the measuring head, and the measuring head is fixed on the upper part of a sliding rod; the lower part of the slide bar is arranged in the gauge body and can slide in the gauge body for a set distance; the gauge body is provided with a second boss extending outwards, and the upper surface of the first boss is parallel to the upper surface of the second boss; the gauge is specifically arranged on the support, a dial indicator is arranged in the support, a gauge head of the dial indicator is clamped on the support upwards, the gauge head and the sliding rod are coaxially arranged, and the top of the gauge head can be in contact with the bottom end of the sliding rod. The device can be positioned to a reference surface and a measuring surface with high precision, the measuring precision is high, and the consistency of products is improved.
Description
Technical Field
The invention relates to a cantilever type length high-precision length measuring device.
Background
Generally, a universal gauge, such as a measuring tape, a straight steel ruler, a vernier caliper and the like, can be selected for measuring the length dimension which is simple in shape, low in precision of the measured dimension and convenient to measure according to the precision requirement. Specially-made special gauges are widely used in workpiece processing, assembly inspection under the following conditions: 1. the universal gauge cannot meet the inspection requirement; 2. in order to be convenient to use, the inspection efficiency is improved so as to meet the requirement of mass production; 3. the precision requirement of the measured length dimension is high, and the part of the detected workpiece is complex.
The length measuring device of cantilever type structure belongs to the high-precision measurement, adopts general gauge to measure usually, because cantilever type structure shape differs, exists some and interferes the position, can not pinpoint to measuring the face, influences measurement accuracy. Like the workpiece shape in FIG. 13, the two ends of the measured dimension "L" are blocked, i.e. there is a situation that the measurement is inconvenient due to the interference of the convex platform G, or the length of the workpiece dimension "a" is measured like the calibration block shape (dimension b is less than or equal to c) in FIG. 12; the traditional measuring tool is difficult to avoid the interference part to extend into the measured part, so that the measured size cannot be accurately obtained.
Disclosure of Invention
The invention aims to solve the problems, and provides a cantilever type length high-precision length measuring device which can be used for positioning a reference surface and a measuring surface with high precision, has high measuring precision and improves the consistency of products.
In order to realize the purpose, the invention adopts the technical scheme that: a cantilever type length high-precision length measuring device comprises a measuring head, wherein a first boss extending outwards is arranged on the measuring head, and the measuring head is fixed on the upper part of a sliding rod; the lower part of the slide bar is arranged in the gauge body and can slide in the gauge body for a set distance; the gauge body is provided with a second boss extending outwards, and the upper surface of the first boss is parallel to the upper surface of the second boss; the gauge is specifically arranged on the support, a dial indicator is arranged in the support, a gauge head of the dial indicator is clamped on the support upwards, the gauge head and the sliding rod are coaxially arranged, and the top of the gauge head can be in contact with the bottom end of the sliding rod.
Further, the measuring body comprises a columnar cylinder and a second boss, a stepped hole penetrating through two ends of the columnar cylinder is formed in the middle of the columnar cylinder, and the stepped hole is provided with a slide rod mounting hole, a spring placing hole, a threaded sleeve mounting threaded hole and a transition hole from top to bottom; mounting bosses are symmetrically arranged on two sides of the bottom of the columnar cylinder, the mounting bosses and the columnar cylinder are arranged in a T shape, and fixing holes are formed in the mounting bosses; the second boss is arranged at the top of the measuring body, is vertical to the wall of the columnar cylinder and is arranged in a 7 shape.
Furthermore, the slide rod is a stepped shaft and is provided with a thread section, a measuring head mounting section, a shaft shoulder section, a sliding section and a spring mounting section from top to bottom, the middle part of the cylindrical surface of the sliding section is provided with a rectangular groove, and the measuring head mounting section is provided with a limiting hole; the sliding section is arranged in the sliding rod mounting hole.
Furthermore, a nut is arranged on the thread section, and the bottom of the nut is in contact with the top of the measuring head.
Furthermore, the measuring head comprises a cylinder and a first boss connected with the cylinder, the cylinder is arranged at the measuring head mounting section, a second threaded hole perpendicular to the cylinder wall is formed in the outer wall of the cylinder, a set screw is arranged in the second threaded hole, and the end of the set screw is arranged in a limiting hole in the sliding rod.
Furthermore, the outer wall of the slide bar mounting hole section at the upper part of the gauge body is provided with a first threaded hole perpendicular to the slide bar mounting hole, a guide screw is arranged in the first threaded hole, the end part of the guide screw is arranged in the rectangular groove and is not in contact with the bottom of the rectangular groove, and the height of the rectangular groove is larger than the diameter of the guide screw.
Further, a spring is sleeved on the spring mounting section and is arranged in the spring placing hole; the upper end of the spring is in contact with the lower end of the sliding section, and the lower end of the spring is in contact with the top surface of the external thread sleeve; the external thread sleeve is matched with the thread sleeve mounting threaded hole, and the bottom end of the spring mounting section is arranged in the inner hole of the external thread sleeve.
Furthermore, the support is arched, a gauge head mounting hole penetrates through the middle of the top of the arch, a bushing is sleeved in the gauge head mounting hole and is of a C-shaped annular structure with a gap, and the bushing tightly holds the gauge head and is tightly clamped in the gauge head mounting hole; third threaded holes are symmetrically formed in two sides of the arched top of the support, are matched with fixing holes in the mounting boss at the bottom of the gauge body and are fastened through second screws.
Furthermore, an annular groove is formed in the middle of the outer wall of the bushing, a fourth threaded hole perpendicular to the gauge head mounting hole is formed in the side face of the support, the fourth threaded hole is communicated with the annular groove, a knurled screw is arranged in the fourth threaded hole, and the screwed end portion of the knurled screw is arranged in the annular groove.
The invention has the beneficial effects that:
1. the invention adopts the cantilever type structure measuring head and the positioning surface which can extend into the measured part, skillfully avoids the interference part, and accurately obtains the reading to judge whether the size of the workpiece is qualified.
2. The invention adopts the dial indicator to read, not only has high sensitivity and high measurement precision, but also has visual and clear reading.
3. The invention has simple structure, convenient use, easy maintenance, high working efficiency and the like, and can be widely applied to actual production.
4. The sliding rod designed by the invention can automatically reset after the measurement is finished, and is convenient to use.
Drawings
FIG. 1 is a side cross-sectional view of the present invention.
Fig. 2 is a front sectional view of the present invention.
FIG. 3 is a top view of the present invention.
Fig. 4 is a front sectional view showing the embodiment of the present invention.
FIG. 5 is a top view of an embodiment of the present invention.
FIG. 6 is a front view of the slide bar of the present invention.
Fig. 7 is a front view of the probe of the present invention.
Fig. 8 is a top view of the bushing of the present invention.
Fig. 9 is a front cross-sectional view of the bushing of the present invention.
Fig. 10 is a front sectional view of the holder of the present invention.
Fig. 11 is a cross-sectional view of the externally threaded sleeve of the present invention.
FIG. 12 is a view of a proof mass structure according to the present invention.
FIG. 13 is a schematic view of a workpiece according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, specific embodiments thereof are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
As shown in fig. 1 to 11, the specific structure of the present invention is: a cantilever type length high-precision length measuring device is provided with a sliding rod 13, a nut 7, a measuring head 14, a measuring body 12, a spring 11, an external thread sleeve 4, a dial indicator 6, a support 3 and a base 1 from top to bottom.
The nut 7 is arranged at the top of the sliding rod 13 and tightly presses the measuring head 14 arranged at the upper part of the sliding rod 13, and the measuring head 14 is provided with a first boss 142 extending outwards; the lower part of the sliding rod 13 is arranged on the gauge body 12 and can slide in the gauge body 12 for a set distance; the measuring body 12 is provided with a second boss 136 extending outwards, the upper surface of the second boss 136 is parallel to the upper surface of the first boss 142, the two upper surfaces are used as contact planes with a workpiece to be measured, the upper surface of the second boss 136 is used as a measuring reference positioning surface, the hardness and the form and position precision are high, the second boss is equivalent to an outer measuring claw of the vernier caliper, the upper surface of the first boss 142 is used as a measuring surface, and the hardness and the precision are high and equivalent to an inner measuring claw of the vernier caliper; a spring 11 is further arranged in the gauge body 12, the spring 11 is arranged on a small shaft at the lower part of the sliding rod 13, the position of the lower end of the spring 11 is limited by an internal thread sleeve 4 and an external thread sleeve 4 arranged in the gauge body 12, and the maximum compression or elongation of the spring 11 is limited by the sliding distance of the sliding rod 13 in the gauge body 12; the bottom end of the sliding rod 13 can be contacted with the top of the gauge head 61 of the dial gauge 6 when sliding downwards, and the gauge head 61 is pressed by contact to obtain a reading on the dial gauge 6; the gauge outfit 61 of the dial gauge 6 is clamped on the support 3 upwards, and the support 3 is fixed on the base 1.
Preferably, the gauge body 12 comprises a cylindrical tube 127 and a second boss 126, a stepped hole penetrating through two ends of the cylindrical tube 127 is formed in the middle of the cylindrical tube 127, and the stepped hole is provided with a slide bar mounting hole 121, a spring placing hole 122, a thread sleeve mounting threaded hole 123 and a transition hole 128 from top to bottom; a sliding rod 13 is arranged in the sliding rod mounting hole 121, and the sliding rod 13 slides up and down in the sliding rod mounting hole 121; the spring 11 is placed in the spring placing hole 122, and the spring 11 is compressed in the hole; the external thread sleeve 4 is arranged in the thread sleeve mounting threaded hole 123, and the thread height of the thread sleeve mounting threaded hole 123 is larger than that of the external thread sleeve 4, so that the external thread sleeve 4 can be screwed up and down in the thread sleeve mounting threaded hole 123, and the compression amount of the spring 11 is adjusted; the transition hole 128 plays a transition role, and a threaded sleeve mounting threaded hole 123 is formed through the transition hole 128; the gauge body 12 is arranged on the support 3 by means of a second screw 17.
Further, mounting bosses 124 are symmetrically arranged on two sides of the bottom of the cylindrical barrel 127, the mounting bosses 124 and the cylindrical barrel 127 are arranged in a T shape, and fixing holes 125 are arranged on the mounting bosses 124; the second boss 126 is arranged at the top of the measuring body 12, is perpendicular to the wall of the cylindrical barrel 127 and is arranged in a 7 shape.
Preferably, the slide rod 13 is a stepped shaft, and is provided with a threaded section 131, a measuring head mounting section 132, a shaft shoulder section 133, a sliding section 134 and a spring mounting section 135 from top to bottom; the nut 7 is arranged on the threaded section 131 to tightly press the measuring head 14, and the measuring head 14 is arranged on the measuring head mounting section 132, and the bottom of the measuring head 14 is contacted with the top surface of the shaft shoulder section 133; the sliding section 134 is arranged in the sliding rod mounting hole 121, the sliding section 134 is in clearance fit with the sliding rod mounting hole 121, the diameter of the sliding rod mounting hole 121 is smaller than that of the shaft shoulder section 133, the middle of the cylindrical surface of the sliding section 134 is provided with a rectangular groove 136, the sliding rod 13 slides up and down in the area between the upper end and the lower end of the rectangular groove 136, the upper portion of the measuring body 12 is provided with a first threaded hole 129 perpendicular to the sliding rod mounting hole 121 on the outer wall of the sliding rod mounting hole 121, a guide screw 9 is arranged in the first threaded hole 129, the end portion of the guide screw 9 is arranged in the rectangular groove 136 and is not in contact with the bottom of the rectangular groove, the height of the rectangular groove 136 is larger than the diameter of the guide screw 9, the up-and-down movement distance of the sliding rod 13 is limited by arranging the guide screw 9 in the rectangular groove 136, and.
Further, the inner hole of the external thread sleeve 4 is provided with a small hole 41 at the contact end with the spring 11 and a large hole 42 at the lower part of the small hole, the small hole 41 and the large hole 42 are coaxially arranged, and the diameter of the small hole 41 is smaller than the major diameter of the spring 11 and is in clearance fit with the spring mounting section 135 of the sliding rod 13; so as to block the bottom end of the spring 11, the top of the spring 11 is blocked by the bottom of the sliding section 134, and the spring mounting section 135 can move in the external thread bushing 4; the large hole 42 can accommodate the top of the gauge head 61, so that the gauge head 61 can be conveniently contacted with the bottom end of the sliding rod 13.
Preferably, the measuring head 14 comprises a cylinder 141 and a first boss 142 connected with the cylinder 141, the cylinder 141 is arranged at the measuring head mounting section 132 of the slide rod 13, a second threaded hole 143 perpendicular to the cylinder wall is arranged on the outer wall of the cylinder 141, and a set screw 8 is arranged in the second threaded hole 143; the measuring head mounting section 132 is provided with a limiting hole 137, the end of the set screw 8 is arranged in the limiting hole 137, the set screw 8 passes through the second threaded hole 143 and is arranged in the limiting hole 137 to limit the rotation and the up-and-down movement of the measuring head 14, and the nut 7 is arranged on the upper part of the measuring head 14 to press the measuring head 14 again, so that the mounting is firm.
Preferably, the support 3 is in an arch shape, a gauge outfit mounting hole 32 is arranged in the middle of the top of the arch shape in a penetrating manner, a bushing 5 is sleeved in the gauge outfit mounting hole 32, the bushing 5 is in a C-shaped annular structure with a notch 52, and the bushing 5 tightly holds the gauge outfit 61 and is clamped in the gauge outfit mounting hole 32, similar to an expansion sleeve; third threaded holes 31 are symmetrically formed in two sides of the arched top of the support 3, and the third threaded holes 31 are matched with fixing holes 125 in a mounting boss 124 at the bottom of the gauge body 12 and are fastened through second screws 17; the support 3 is arranged to be in an arch structure, the dial indicator 6 is convenient to mount, the support 3 is arranged on the base 1, the base 1 is in a U-shaped structure, and the base 1 is fixed to the bottom of the support 3 through the first screw 2.
Preferably, an annular groove 51 is formed in the middle of the outer wall of the bushing 5, a fourth threaded hole 33 perpendicular to the gauge head mounting hole 32 is formed in the side surface of the support 3, the fourth threaded hole 33 is communicated with the annular groove 51, a knurled screw 10 is arranged in the fourth threaded hole 33, and the end part of the knurled screw 10 screwed in is arranged in the annular groove 51.
When the measuring tool is used specifically, as shown in fig. 1-13, before the measuring tool is used, the knurled screw 10 is unscrewed, the surface A of the calibration block 15 hooks the surface C of the measuring head 14, and the measuring head 14 is pressed to move downwards, so that the surface B of the calibration block 15 is placed on the surface D of the measuring tool body 12 and is tightly attached to the surface D; loosening the knurled screw 10, and adjusting the dial indicator to enable the gauge head 61 of the dial indicator 6 to be in contact with the end face of the spring mounting section 135 of the sliding rod 13 and enable the pointer to be aligned to the zero position; then screwing the knurled screw 10, tightly holding the dial indicator 6 through the shaft sleeve 5, and enabling the dial indicator 6, the bushing 5 and the support 3 not to move relatively; after the pointer of the dial indicator 6 is ensured to be aligned with the zero position, the measurement can be started.
When in measurement, the surface E of the measured plane of the workpiece is hooked on the surface C of the measuring head 14, the measuring head 14 is pressed to drive the sliding rod 13 to move downwards against the action of the spring force, and the surface F of the workpiece is placed on the surface D of the measuring body to be tightly attached to the surface D; at the moment, the spring 11 is continuously compressed, and the end face of the spring mounting section 135 of the slide rod 13 pushes against the gauge head 61 of the dial gauge 6, so that the gauge head is pressed into the gauge shaft sleeve; meanwhile, the pointer of the dial indicator 6 rotates to display a reading, and whether the size of the workpiece is qualified or not is determined according to the deviation of the pointer from the zero position.
After the measurement is finished, the workpiece is taken away, the sliding rod 13 moves upwards under the action of the spring force, the gauge head of the dial indicator 6 resets, and the pointer returns to the zero position. If the force for pressing the gauge outfit 61 is too large or too small during measurement, the external thread sleeve 4 can be screwed down or heightened, so that the initial compression amount of the compression spring 11 is reduced (the pre-pressure is small) or increased, and the use is more flexible.
Claims (9)
1. A cantilever type length high-precision length measuring device is characterized by comprising a measuring head, wherein a first boss extending outwards is arranged on the measuring head, and the measuring head is fixed at the upper part of a sliding rod; the lower part of the slide bar is arranged in the gauge body and can slide in the gauge body for a set distance; the gauge body is provided with a second boss extending outwards, and the upper surface of the first boss is parallel to the upper surface of the second boss; the gauge is specifically arranged on the support, a dial indicator is arranged in the support, a gauge head of the dial indicator is clamped on the support upwards, the gauge head and the sliding rod are coaxially arranged, and the top of the gauge head can be in contact with the bottom end of the sliding rod.
2. The cantilever type length high-precision length measuring device according to claim 1, wherein the gauge body comprises a cylindrical tube and a second boss, a stepped hole penetrating through two ends of the cylindrical tube is formed in the middle of the cylindrical tube, and the stepped hole is formed into a slide bar mounting hole, a spring placing hole, a threaded sleeve mounting threaded hole and a transition hole from top to bottom; mounting bosses are symmetrically arranged on two sides of the bottom of the columnar cylinder, the mounting bosses and the columnar cylinder are arranged in a T shape, and fixing holes are formed in the mounting bosses; the second boss is arranged at the top of the measuring body, is vertical to the wall of the columnar cylinder and is arranged in a 7 shape.
3. The cantilever type length high-precision length measuring device according to claim 2, wherein the slide bar is a stepped shaft and is provided with a thread section, a measuring head mounting section, a shaft shoulder section, a slide section and a spring mounting section from top to bottom, the middle part of the cylindrical surface of the slide section is provided with a rectangular groove, and the measuring head mounting section is provided with a limiting hole; the sliding section is arranged in the sliding rod mounting hole.
4. The cantilever-type high-precision length measuring device according to claim 3, wherein the threaded section is provided with a nut, and the bottom of the nut is in contact with the top of the measuring head.
5. The cantilever type length high-precision length measuring device according to claim 3, wherein the measuring head comprises a cylinder and a first boss connected with the cylinder, the cylinder is arranged on the measuring head mounting section, a second threaded hole arranged perpendicular to the cylinder wall is formed in the outer wall of the cylinder, a set screw is arranged in the second threaded hole, and the end of the set screw is arranged in a limiting hole in the slide rod.
6. The cantilever-type high-precision length measuring device according to claim 3, wherein the upper part of the gauge body is provided with a first threaded hole perpendicular to the slide bar mounting hole on the outer wall of the slide bar mounting hole section, a guide screw is arranged in the first threaded hole, the end part of the guide screw is arranged in a rectangular groove and is not in contact with the bottom of the rectangular groove, and the height of the rectangular groove is larger than the diameter of the guide screw.
7. The cantilever-type high-precision length measuring device according to claim 3, wherein the spring mounting section is sleeved with a spring, and the spring is arranged in a spring placing hole; the upper end of the spring is in contact with the lower end of the sliding section, and the lower end of the spring is in contact with the top surface of the external thread sleeve; the external thread sleeve is matched with the thread sleeve mounting threaded hole, and the bottom end of the spring mounting section is arranged in the inner hole of the external thread sleeve.
8. The cantilever-type high-precision length measuring device according to claim 1, wherein the support is in an arch shape, a gauge head mounting hole penetrates through the middle of the top of the arch shape, a bushing is sleeved in the gauge head mounting hole and is in a notched C-shaped annular structure, and the bushing embraces the gauge head and is clamped in the gauge head mounting hole; third threaded holes are symmetrically formed in two sides of the arched top of the support, are matched with fixing holes in the mounting boss at the bottom of the gauge body and are fastened through second screws.
9. The cantilever-type high-precision length measuring device according to claim 8, wherein an annular groove is formed in the middle of the outer wall of the bushing, a fourth threaded hole perpendicular to the gauge head mounting hole is formed in the side surface of the support, the fourth threaded hole is communicated with the annular groove, a knurled screw is arranged in the fourth threaded hole, and the end part of the knurled screw, into which the knurled screw is screwed, is arranged in the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911317322.8A CN110836625A (en) | 2019-12-19 | 2019-12-19 | Cantilever type length high-precision length measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911317322.8A CN110836625A (en) | 2019-12-19 | 2019-12-19 | Cantilever type length high-precision length measuring device |
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| Publication Number | Publication Date |
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| CN110836625A true CN110836625A (en) | 2020-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911317322.8A Pending CN110836625A (en) | 2019-12-19 | 2019-12-19 | Cantilever type length high-precision length measuring device |
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| CN (1) | CN110836625A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683123A (en) * | 2020-12-25 | 2021-04-20 | 西南交通大学 | Detection module, measurement device and measurement method |
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2019
- 2019-12-19 CN CN201911317322.8A patent/CN110836625A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683123A (en) * | 2020-12-25 | 2021-04-20 | 西南交通大学 | Detection module, measurement device and measurement method |
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