CN107414701B - Movable self-positioning mechanism - Google Patents
Movable self-positioning mechanism Download PDFInfo
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- CN107414701B CN107414701B CN201710795948.4A CN201710795948A CN107414701B CN 107414701 B CN107414701 B CN 107414701B CN 201710795948 A CN201710795948 A CN 201710795948A CN 107414701 B CN107414701 B CN 107414701B
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- elastic deformation
- positioning mechanism
- mounting hole
- positioning
- movable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention provides a movable self-positioning mechanism capable of automatically positioning a measured object. The movable self-positioning mechanism is provided with a bottom block (1) and a measured object holding mechanism, wherein the measured object holding mechanism is movably arranged on the bottom block (1) through an elastic deformation body (8), when a positioning surface of a measured object held on the measured object holding mechanism is abutted by a pressure head of a measured mechanism, the elastic deformation body (8) can generate elastic deformation under the pushing of the measured object holding mechanism, so that the measured object is automatically positioned at a position where the positioning surface is compacted by the pressure head.
Description
Technical Field
The invention relates to a movable self-positioning mechanism.
Background
In a measuring system, the positioning of the measured object relative to the measuring mechanism is of great importance, and the measurement result and the measurement repeatability reliability are directly influenced. The placing environment of the measured object is complex and changeable, and the condition of the workbench directly influences the precision measurement result.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an adaptive movable self-positioning mechanism that can be adapted to different measurement environments to ensure measurement accuracy.
In order to achieve the purpose, the invention adopts the following technical scheme. In the following description of the embodiments, the reference numerals attached to the corresponding features denote the structures corresponding to the features in the embodiments, and do not have the meanings equivalent to the features, and do not limit the scope of the embodiments.
With such a movable self-positioning mechanism, since the measured object holding mechanism is mounted to the bottom block in a movable manner via the elastic deformation body, when the positioning surface of the measured object held by the measured object holding mechanism is abutted by the indenter, the elastic deformation body can be elastically deformed, and the elastic deformation at this time can be uneven in the circumferential direction, so that the measured object can be positioned at a position where the positioning surface is pressed by the indenter, thereby ensuring the measurement accuracy and the like. In actual measurement, objective environments are complex and changeable, and some table surfaces have good flatness, but some table surfaces do not have flatness. The mechanism of the invention can adapt no matter how smooth the table top and the like are, and can ensure that the accurate measurement value can be obtained under any working condition.
The invention according to claim 2 is the movable self-positioning mechanism according to claim 1, characterized in that the elastically deformable body (8) is supported by the bottom block (1) above the bottom block (1), and the measured object holding mechanism is supported by the elastically deformable body (8) above the elastically deformable body (8).
The invention according to claim 3 is the movable self-positioning mechanism according to claim 2, characterized in that a mounting hole is provided in the bottom block (1), a support ball is provided in the mounting hole, the measured object holding mechanism has a shaft-like portion (3 a) that protrudes into the mounting hole, and a lower end surface of the shaft-like portion (3 a) is supported by the support ball.
The supporting ball for supporting the retaining mechanism of the measured object is arranged, so that the compressible deformable body is prevented from being subjected to excessive force to cause destructive deformation, and the service life of the compressible deformable body is prolonged.
The invention according to claim 4 is characterized in that a cushion block (6) is arranged in the mounting hole, and the supporting ball is placed on the cushion block (6).
The technical scheme 5 is the movable self-positioning mechanism according to the technical scheme 4, and is characterized in that a limiting sleeve (5) is arranged on the cushion block (6), and the supporting ball is positioned on the inner periphery of the limiting sleeve (5) and limited by the limiting sleeve (5).
The invention according to claim 6 is characterized in that the movable self-positioning mechanism according to claim 4 is provided with a cemented carbide portion for contacting the support ball, on a lower end surface of the shaft-like portion (3 a) and an upper end surface of the spacer (6).
The invention according to claim 7 is the movable self-positioning mechanism according to claim 2, characterized in that a small diameter portion is formed at an upper end portion of the bottom block (1), a stopper ring (4) is fitted over the small diameter portion, and the elastic deformation body (8) is disposed on an inner periphery of the stopper ring (4) and is stopped by the stopper ring (4).
The invention according to claim 8 is the movable self-positioning mechanism according to claim 2, characterized in that the measured object holding mechanism has a positioning seat (2) and a movable rod (3) which are attached together, the positioning seat (2) has a measured object holding portion, and the movable rod (3) has a main body portion (3 b) supported by the elastically deformable body (8) and a shaft-like portion (3 a) which extends from the main body portion (3 b) into a mounting hole formed in the bottom block (1).
Therefore, the movable rod can be limited and guided by the mounting hole of the bottom block, and the stability of the movable rod is kept.
The invention according to claim 9 is characterized in that the main body portion (3 b) is in a flange shape with respect to the shaft-like portion (3 a) and is placed on the elastic deformation body (8).
The movable rod can be limited and guided by the mounting hole of the bottom block, the stability of the movable rod is kept, and the movable rod is placed on the elastic deformation body, so that the movable rod is simple in structure, low in cost and easy to take down.
Technical solution 10 the movable self-positioning mechanism according to any one of the technical solutions 2 to 9, characterized in that the elastic deformation body is composed of a polyurethane rubber material, an ethylene propylene diene monomer rubber material, a nitrile rubber material, a silicone rubber material, or a spring.
Preferably, a material of urethane rubber is used, and urethane rubber has higher strength than other rubbers and is less likely to cause torsion when deformed like a spring to affect a measurement value.
Drawings
FIG. 1 is an oblique view of a movable self-positioning mechanism involved in an embodiment;
fig. 2 is a partial cross-sectional view of the movable self-positioning mechanism.
Description of the reference numerals
1. A bottom block; 2. positioning seats; 3. a movable rod; 4. a limiting ring; 5. a position limiting sleeve; 6. a cushion block; 7. steel balls (bearing balls); 8. the elastically deformable body can be compressed.
Detailed Description
The following describes a specific embodiment of the present invention with reference to the drawings. Fig. 1 is a perspective view of a movable self-positioning mechanism (which may be simply referred to as a positioning mechanism) 100 according to the present embodiment; fig. 2 is a sectional view of the movable self-positioning mechanism 100.
As shown in fig. 1 and 2, the positioning mechanism 100 has a base block 1 fixed to, for example, a table (not shown), and the base block 1 functions to fix and support the entire mechanism. The upper end face of the bottom block 1 is provided with a mounting hole, a cushion block 6, a steel ball (supporting ball) 7 and a limiting sleeve 5 are mounted (placed) in the mounting hole, wherein the steel ball 7 and the limiting sleeve 5 are arranged on the upper end face of the cushion block 6, the steel ball 7 is positioned on the inner periphery of the limiting sleeve 5, and the position of the limiting sleeve 5 is kept.
The lower end face of the bottom block 1 is provided with a communication hole 1a communicated with the mounting hole, and the communication hole 1a is arranged for: when the mat 6 is put into the mounting hole, the gas is discharged so that the mat 6 can easily reach the bottom of the mounting hole and the mat 6 can be easily removed when the mat 6 is taken out, or when the mat 6 is taken out, the mat 6 can be pushed out through the communication hole 1a by using an elongated tool. The communication hole 1a has a smaller diameter than the mounting hole, and as a whole, forms a stepped through hole portion which vertically penetrates the bottom block 1.
The upper end of the bottom block 1 is formed with a small diameter part, the outer periphery of which is sleeved with a limit ring 4, and the upper end surface of which is placed with a compressible elastic deformation body 8, the compressible elastic deformation body 8 is supported by the bottom block 1, and the compressible elastic deformation body enters the inner periphery of the limit ring 4 and is limited by the limit ring 4. In the present embodiment, the elastic compressible deformation body 8 is a cylindrical body made of a urethane rubber material, and the center hole thereof is penetrated by the shaft-like portion 3a of the movable rod 3 described later.
The retainer ring 4 is provided with a locking hole 4a, and the locking hole 4a is provided at a position facing the outer peripheral surface of the small diameter portion of the bottom block 1, and a screw (not shown) is screwed in, and the tip of the screw abuts against the outer peripheral surface of the bottom block 1, whereby the rotation of the retainer ring 4 can be suppressed.
The movable rod 3 is placed on the upper end face of the elastic compressible deformation body 8, the movable rod 3 is provided with a main body part 3b and a shaft-shaped part 3a, the main body part 3b is in a short cylindrical shape, the lower end face of the main body part is placed on the upper end face of the elastic compressible deformation body 8, the diameter of the shaft-shaped part 3a is smaller than that of the main body part 3b (the main body part 3b is in a flange shape relative to the shaft-shaped part 3 a), the shaft-shaped part extends downwards from the main body part 3b and extends into a mounting hole of the bottom block 1, and the lower end face of the shaft-shaped part is in contact with the steel ball 7 or has a slight gap with the steel ball 7. In the present embodiment, the lower end of the shaft-like portion 3a is formed as a small diameter portion having a diameter smaller than the mounting hole of the bottom block 1 to form a gap therebetween.
A cemented carbide portion (not shown) is fitted to a lower end surface of the shaft-shaped portion 3a of the movable rod 3, and similarly, a cemented carbide portion (not shown) is fitted to an upper end surface of the spacer 6, and the shaft-shaped portion 3a of the movable rod 3 and the spacer 6 are in contact with the steel ball 7 through these two cemented carbide portions.
A stepped through hole is provided in a body portion 3b of the movable rod 3, a positioning seat 2 is provided on an upper end surface of the body portion 3b, a screw hole 2b corresponding to the stepped through hole is provided in the positioning seat 2, and the positioning seat 2 is fixed to the movable rod 3 by a screw (not shown) screwed into the stepped through hole and the screw hole 2 b.
The positioning socket 2 is provided with a measured object holding hole 2a (an example of a measured object holding portion), and the measured object holding hole 2a is formed in a stepped hole shape having a small diameter at a lower portion thereof and is capable of holding a nozzle tip 30 (shown by a broken line in the figure) as a measured object.
The movable rod 3 and the positioning base 2 constitute a measured object holding mechanism of the present invention.
Next, the operation of the movable self-positioning mechanism 100 of the present embodiment at the time of measurement will be described.
First, the nozzle tip 30 as an example of the object to be measured in the present embodiment will be described. The nozzle tip 30 is a mating part and is assembled from two parts (a needle and a nozzle tip), and the relative drop value of the needle surface 32 and the nozzle tip surface 31, i.e., the vertical distance between the two, needs to be measured.
In this case, the basic measurement process is to press the nozzle face 31 (an example of a positioning face) with a ram (not shown) of a measuring mechanism, and to press a probe (not shown) connected to a displacement sensor and capable of sliding up and down against the needle face 32, and to monitor the displacement change of the probe by the sensor, thereby obtaining the relative distance between the needle face 32 and the nozzle face 31. Therefore, the nozzle face 31 needs to be completely attached to the pressure head, if the circumferential inclination exists, the compaction does not exist, the measurement precision and repeatability are influenced, and different size values can be obtained by rotating the workpiece.
In the movable self-positioning mechanism 100 according to the present embodiment, when the indenter abuts against the nozzle face 31, the positioning seat 2 and the movable rod 3 compress the elastic deformable body 8 slightly to generate elastic deformation, and the positioning seat 2 slightly moves or rocks due to the elastic deformation, so that the nozzle face 31 of the nozzle 30 held thereon is automatically adjusted to an optimum position in which the nozzle face completely fits to the indenter, and is pressed against the indenter, thereby ensuring the uniformity of measurement dimensions in each direction, the accuracy, and the like.
In addition, in the present embodiment, since the steel ball 7 for supporting is provided, it is possible to prevent the compressible deformable body from being deformed destructively due to an excessive force applied thereto, and to prolong the service life thereof. Further, the steel ball 7 may be omitted depending on the magnitude of the pressing force of the ram.
In the present embodiment, the movable block 3 is placed on the elastic compressible deformation body 8 and can be easily removed, so that it is convenient to replace the positioning base 2 of different specifications and types to correspond to different objects to be measured.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
For example, instead of the urethane rubber, a soft material such as ethylene propylene diene monomer, nitrile rubber, or silicone rubber may be used for the compressible elastic body 8. In addition, the compressible elastic deformation body may be formed using a spring. The elastic compressible member is not limited to the cylindrical body as in the above-described embodiment, and may be, for example, an elastic compressible member made of urethane rubber or the like or springs arranged in a plurality of numbers in the circumferential direction.
In the above embodiment, the main components of the positioning mechanism 100 are arranged in the vertical direction, that is, the elastic compressible deformation body 8 is placed above the bottom block 1, and the movable rod 3 and the positioning seat 2 are placed on the elastic compressible deformation body 8, however, the present invention is not limited to this, and the orientation of the positioning mechanism 100 may be changed, and in this case, in order to maintain the positional relationship between the components, a corresponding holding portion may be appropriately added.
In the above embodiment, the movable rod 3 constituting the measured object holding mechanism is formed separately from the positioning stand 2, but the present invention is not limited thereto, and both may be formed integrally.
The structure for elastically deforming the object to be measured (object holding mechanism) is not limited to the compression type, and for example, a tension spring type structure may be employed.
Claims (8)
1. A movable self-positioning mechanism is characterized in that,
comprising a base block (1) and a measured object holding mechanism which is movably mounted to the base block (1) by means of an elastically deformable body (8),
when the positioning surface of the object to be measured held by the object-to-be-measured holding mechanism is abutted against the indenter, the elastically deformable body (8) can be elastically deformed to make the object to be measured movable;
the elastic deformation body (8) is positioned above the bottom block (1) and supported by the bottom block (1), and the measured object holding mechanism is positioned above the elastic deformation body (8) and supported by the elastic deformation body (8);
the bottom block (1) is provided with a mounting hole, a supporting ball (7) is arranged in the mounting hole,
the measured object holding mechanism has a shaft-like portion (3 a) that extends into the mounting hole, a lower end surface of the shaft-like portion (3 a) is supported by the support ball,
the elastic deformation body (8) is cylindrical, and the shaft-shaped part (3 a) extends into the mounting hole through a center hole of the elastic deformation body (8).
2. The movable self-positioning mechanism according to claim 1, characterized in that a spacer block (6) is provided in the mounting hole, the retainer ball (7) is placed on the spacer block (6), a communication hole (1 a) communicating with the mounting hole is provided in a lower end face of the bottom block, and the diameter of the communication hole (1 a) is smaller than that of the mounting hole.
3. The movable self-positioning mechanism according to claim 2, characterized in that a stop collar (5) is provided on the spacer (6), and the supporting ball is positioned on the inner periphery of the stop collar (5) and is limited by the stop collar (5).
4. The movable self-positioning mechanism according to claim 2, characterized in that a cemented carbide portion for contact with the support ball is provided on the lower end face of the shaft-like portion (3 a) and the upper end face of the spacer (6).
5. The movable self-positioning mechanism according to claim 1, wherein a small diameter portion is formed at an upper end portion of the bottom block (1), a stopper ring (4) is fitted over the small diameter portion, and the elastic deformable body (8) is disposed on an inner periphery of the stopper ring (4) and is stopped by the stopper ring (4).
6. The movable self-positioning mechanism according to claim 1, characterized in that the measured object holding mechanism has a positioning socket (2) and a movable bar (3) mounted together,
the positioning seat (2) is provided with a part for holding the object to be measured,
the movable rod (3) has a main body part (3 b) supported by the elastic deformation body (8) and a shaft-like part (3 a) extending from the main body part (3 b) into a mounting hole formed in the bottom block (1).
7. The movable self-positioning mechanism of claim 6,
the main body portion (3 b) is in a flange shape with respect to the shaft-shaped portion (3 a) and is placed on the elastic deformation body (8).
8. The movable self-positioning mechanism of any one of claims 1 to 7, characterized in that,
the elastic deformation body is composed of a polyurethane rubber material body, an ethylene propylene diene monomer rubber material body, a nitrile rubber material body, a silicon rubber material body or a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710795948.4A CN107414701B (en) | 2017-09-05 | 2017-09-05 | Movable self-positioning mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710795948.4A CN107414701B (en) | 2017-09-05 | 2017-09-05 | Movable self-positioning mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107414701A CN107414701A (en) | 2017-12-01 |
| CN107414701B true CN107414701B (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710795948.4A Active CN107414701B (en) | 2017-09-05 | 2017-09-05 | Movable self-positioning mechanism |
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| CN (1) | CN107414701B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001183105A (en) * | 1999-12-27 | 2001-07-06 | Nidec Tosok Corp | Level-difference measuring apparatus |
| DE102009020313B4 (en) * | 2009-04-30 | 2012-11-08 | Junker & Partner Gmbh | Device for holding a measurement object in a reference position |
| CN101907484B (en) * | 2010-06-30 | 2012-05-02 | 福建省计量科学研究院 | Verification system for large-scale weighing machine and self-location loading-unloading measuring device thereof |
| CN102962782B (en) * | 2012-11-20 | 2015-05-20 | 无锡麦铁精密机械制造有限公司 | Self-positioning adjusting mechanism |
| CN204585029U (en) * | 2015-04-07 | 2015-08-26 | 天津市弭庆科技有限公司 | A kind of detent mechanism detected for plunger skewed slot |
| CN105729291B (en) * | 2016-02-02 | 2017-12-05 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of full-time floating installation |
| CN206405935U (en) * | 2016-08-25 | 2017-08-15 | 重庆财鑫工贸有限责任公司 | Shaft-cup blank three-dimensional coordinates measurement fixture |
| CN207223809U (en) * | 2017-09-05 | 2018-04-13 | 机科发展科技股份有限公司 | Movable self-positioning mechanism |
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2017
- 2017-09-05 CN CN201710795948.4A patent/CN107414701B/en active Active
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| CN107414701A (en) | 2017-12-01 |
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Effective date of registration: 20230627 Address after: 511400 308, 310, Building 2, No. 230, Huangge Section, Shinan Road, Huangge Town, Nansha District, Guangzhou City, Guangdong Province Patentee after: Guangdong Haiyun Smart Bay Area Technology Co.,Ltd. Address before: 2 Shouti South Road, Haidian District, Beijing Patentee before: MACHINERY TECHNOLOGY DEVELOPMENT Co.,Ltd. |