An integrated measuring fixture

Abstract

The utility model relates to a kind of integrated measuring fixture, belongs to part measuring technical field, is related to part integrated measuring fixture technology, mainly applied to the full size of part under the action of different load force is measured. Through the cooperation application of lever, eccentric shaft and spring, realize the full size measurement of part in natural state and multiple clamping state on the same measuring fixture, simple and convenient operation and accurate positioning, avoid the error caused by multiple clamping, high reliability, multiple clamping load force constant, ensure the stability in part measuring process, simple structure is convenient to operate, quickly and accurately place and take down product and switch the measuring state of load force, repeatability is strong, improve work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of parts measurement technology, and relates to integrated parts measurement fixture technology, which is mainly used to measure the full dimensions of parts under different load forces. Background Technology

[0002] Measuring the dimensional changes of plastic parts after simulated assembly and stress testing is a crucial quality control aspect. It's not just about whether it "can be assembled"; quantifying assembly and setting stable load forces are especially important in the testing of precision parts, significantly impacting the accuracy of dimensional measurements. The accuracy of part measurements depends not only on the measuring equipment and laboratory environment, but also, and perhaps more importantly, on the measuring fixture. The suitability of the fixture design directly determines the accuracy and reliability of the measurement results. Currently, coordinate measuring machines (CMMs) are generally used for measuring the dimensions of complex precision parts. Different measuring fixtures are typically used for measurements under different load conditions. Multiple clamping operations not only affect the accuracy of the measurement data but also increase operator time and reduce the efficiency of the measurement process. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated measuring fixture that addresses the problems described in the background art above. It enables full-size measurement under multiple load conditions in a single clamping operation, satisfying the dimensional measurement needs of parts in both natural clamping states and clamping states under different load conditions. The fixture is simple to operate, reduces errors, and improves work efficiency. By installing a different type of spring, it achieves clamping and measurement of parts under different load conditions, solving the errors and inconveniences caused by repeatedly clamping parts using different measuring fixtures under different load conditions in conventional techniques.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: an integrated measuring fixture, the structure of which includes: a fixed support plate 1, a base 2, a bottom plate 3, an upper lever 4, a handle 5, a lower lever 6, an upper eccentric shaft 7, a lower eccentric shaft 8, a guide post 9, a guide sleeve 10, a shoulder bolt 11, a sliding pressure plate 12, a spring 13, and a part 14. The connection relationship of the integrated measuring fixture is as follows: the fixed support plate 1 is provided with a positioning platform, a guide sleeve hole, a shoulder bolt through hole, a sliding pressure plate groove, a limiting through groove, and a contour support platform; the base 2 is provided with a positioning groove; the fixed support plate 1 and the base 2 are in close contact and locked by bolts for limiting; the guide sleeve 10 is in surface contact with the guide sleeve hole provided on the fixed support plate 1. The interference fit is limited by the mounting platform. The base plate 3 is provided with guide post holes, screw holes, upper eccentric shaft holes, and lower eccentric shaft holes. The upper eccentric shaft 7 is in surface contact with the upper eccentric shaft hole on the base plate 3 for sliding fit. The lower eccentric shaft 8 is in surface contact with the lower eccentric shaft hole on the base plate 3 for sliding fit. The guide post 9 is in surface contact with the guide post hole on the base plate 3 for interference fit and is limited by the mounting platform. The upper lever 4 is provided with a stepped hole. The upper eccentric shaft 7 is in surface contact with the stepped hole on the upper lever 4 for sliding fit and is limited by the step. The lower lever 6 is provided with a stepped hole. The lower eccentric shaft 8 is in surface contact with the stepped hole on the lower lever 6 for sliding fit and is limited by the step. The upper side of the handle 5 is in contact with the upper lever 4 and is locked and fixed by bolts. The lower side of the handle 5 is in contact with the lower lever 4. The lever 6 is fixed by bolts; the guide post 9 and the guide sleeve 10 are in sliding contact; the sliding pressure plate 12 is provided with a through groove, a pressure platform, a pushing platform, and a limiting platform. The sliding pressure plate 12 is in sliding contact with the sliding pressure plate groove on the fixed support plate 1. The pushing platform on the sliding pressure plate 12 is used to push it. The limiting platform on the sliding pressure plate 12 is in contact with and limits the limiting through groove on the fixed support plate 1. The through groove on the sliding pressure plate 12 is stadium-shaped, and the distance between the centers of the two ends is greater than the sliding stroke of the sliding pressure plate 12; the shoulder bolt 11 is in clearance fit with the spring 13, and the shoulder bolt 11 is in clearance fit with the through groove on the sliding pressure plate 12. The shouldered bolt 11 on the fixed support plate 1 has a clearance fit with the screw hole, and the shouldered bolt 11 is locked and fixed with the screw hole on the base plate 3; in the natural clamping state, the pressure table on the sliding pressure plate 12 contacts the surface of the part 14 and limits the part 14; the part 14 contacts the contour support table on the fixed support plate 1 and limits it; the surface of the base plate 3 that contacts the fixed support plate 1 is called the assembly surface, and the surface parallel to the assembly surface is called the non-assembly surface. The distance between the center of the upper eccentric shaft hole and the lower eccentric hole on the base plate 3 and the assembly surface is set as X, and the distance between the center of the eccentric shaft hole and the non-assembly surface is set as Y. The difference between X and Y is equal to the gap distance between the fixed support plate 1 and the base plate 3 after the upper lever 4 and the lower lever 6 are rotated.The different load force detection states of the clamped part 14 can be determined by selecting the spring constant of spring 13 using Hooke's Law. The compression distance of spring 13 is equal to the gap distance between the fixed support plate 1 and the base plate 3 after the upper lever 4 and lower lever 6 are rotated. The connection relationship of the integrated measuring fixture when the load force is applied is as follows: when the handle 5, upper lever 4, and lower lever 6 are rotated 180 degrees as a whole with the upper eccentric shaft 7 and lower eccentric shaft 8 as the central axis, the upper lever 4 and lower lever 6 are in contact with the fixed support plate 1, and the gap distance between the fixed support plate 1 and the base plate 3 is XY. The force applied to part 14 by the compression of spring 13 is the load force required for the simulated installation of part 14. According to Hooke's Law, the load force F = elastic coefficient k * gap distance (XY). By installing springs 13 with different elastic coefficients, the conversion of various force application states can be achieved.

[0005] The integrated measuring fixture is characterized in that: the fixed support plate 1 is provided with a stepped surface, the base 2 is provided with a stepped positioning groove, and further, the fixed support plate 1 and the base 2 are positioned in three directions.

[0006] The integrated measuring fixture is characterized in that: a washer is provided between the shoulder bolt 11 and the spring 13, and a washer is provided between the shoulder bolt 11 and the sliding pressure plate 12.

[0007] The beneficial effects of this utility model are: an integrated measuring fixture, through the combined application of levers, eccentric shafts and springs, enables full-size measurement of parts in their natural state and multiple clamping states on the same measuring fixture. It is simple and convenient to operate and has accurate positioning, avoiding errors caused by multiple clamping. It has high reliability, and the load force remains constant during multiple clamping, ensuring the stability of the parts during the measurement process. The structure is simple and easy to operate, allowing for quick and accurate placement and removal of products and switching of load force measurement states. It has strong repeatability and improves work efficiency. Attached Figure Description

[0008] The following description, in conjunction with the accompanying drawings, illustrates specific embodiments.

[0009] Figure 1 This is an exploded view of an integrated measuring fixture.

[0010] Figure 2 An assembly of an integrated measuring fixture Figure 1 .

[0011] Figure 3 An assembly of an integrated measuring fixture Figure 2 .

[0012] Figure 4 This is a schematic diagram of the natural clamping state of a part in an integrated measuring fixture.

[0013] Figure 5A schematic diagram of the clamping state of a part under load force in an integrated measuring fixture. Figure 1 .

[0014] Figure 6 A schematic diagram of the clamping state of a part under load force in an integrated measuring fixture. Figure 2 .

[0015] In the diagram, 1 is a fixed support plate; 2 is a base; 3 is a bottom plate; 4 is an upper lever; 5 is a handle; 6 is a lower lever; 7 is an upper eccentric shaft; 8 is a lower eccentric shaft; 9 is a guide post; 10 is a guide sleeve; 11 is a shoulder bolt; 12 is a sliding pressure plate; 13 is a spring; and 14 is a part. Detailed Implementation

[0016] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The present invention is described in detail with reference to the illustrated diagrams. The illustrated diagrams are merely examples in the detailed description of the embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0017] The specific embodiments of the utility model are described in detail below with reference to the technical text and accompanying drawings.

[0018] An assembly embodiment of an integrated measuring fixture: A guide post 9 is fitted into a guide post hole machined in the base plate 3; an upper eccentric shaft 7 is fitted into an upper eccentric shaft hole machined in the base plate 3; an upper lever 4 is fitted with the upper eccentric shaft 7; a bolt passes through the upper lever 4 and locks it to the handle 5; a lower eccentric shaft 8 is fitted into a lower eccentric shaft hole machined in the base plate 3; a lower lever 6 is fitted with the lower eccentric shaft 8; a bolt passes through the lower lever 6 and locks it to the handle 5; the upper lever 4, handle 5, and lower lever 6, as a whole, can rotate around the central axis of the upper eccentric shaft 7 and lower eccentric shaft 8; a guide sleeve 10 is fitted into a guide sleeve hole machined in the fixed support plate 1; and a shoulder bolt 11 is fitted with... After the washer is installed, the spring 13 is fitted onto the shoulder bolt 11, and the washer is fitted onto the shoulder bolt 11 and contacts the surface of the spring 13. The sliding pressure plate 12 is fitted into the sliding pressure plate groove machined on the fixed support plate 1. The shoulder bolt 11 and the spring 13 pass through the through groove machined on the sliding pressure plate 12 as a whole. The shoulder bolt 11 passes through the shoulder bolt through hole machined on the fixed support plate 1 and locks into the screw hole machined on the base plate 3. Thus, the fixed support plate 1 and the base plate 3 are fitted as a whole. The fixed support plate 1 and the base plate 3, as a whole, fit into the positioning groove machined on the base 2. The bolt passes through the base 2 and locks it to the fixed support plate 1 (see...). Figure 1 ,2 3).

[0019] An embodiment of the inspection application of an integrated measuring fixture: Part 14 is mounted on a pre-machined contour support platform on a fixed support plate 1. Part 14 has multiple assembly surfaces. The number of sliding pressure plates 12 is evenly distributed on the assembly surfaces of part 14 to ensure uniform force on part 14. The sliding pressure plates 12 are pushed to contact and limit contact with the assembly surfaces on part 14. At this time, a coordinate measuring machine can be used to perform full-dimensional measurement of part 13 in its natural state (see...). Figure 4 When the handle 5, upper lever 4, and lower lever 6 rotate as a whole around the central axis with the upper eccentric shaft 7 and lower eccentric shaft 8, the proximal surfaces of the upper lever 4 and lower lever 6 rotate and separate from the fixed support plate 1. When rotated 180 degrees, the upper lever 4 and lower lever 6 contact the fixed support plate 1, and the separation distance between the fixed support plate 1 and the base plate 3 remains constant. At this time, the force applied to the part 14 by the spring 13 is the load force required for the simulated installation of the part 14. At this time, the part 14 under the fixed load force can be fully measured by a coordinate measuring machine (see...). Figure 5 , 6 ).

[0020] During implementation, the integrated measuring fixture can perform batch inspection of parts 14 with similar internal cavity shapes, and clamping of similar parts 14 is achieved by sliding pressure plate 12. The integrated measuring fixture can also perform dimensional measurement of the same part 14 under different load force clamping states, by selecting springs 13 with different elastic coefficients, thus solving the errors and inconveniences caused by repeatedly clamping parts with different measuring fixtures under different load force states in conventional technology.

[0021] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0022] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art to which this utility model pertains can make various improvements and modifications without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An integrated measuring fixture, characterized in that... Its structure includes: a fixed support plate (1), a base (2), a bottom plate (3), an upper lever (4), a handle (5), a lower lever (6), an upper eccentric shaft (7), a lower eccentric shaft (8), a guide post (9), a guide sleeve (10), a shoulder bolt (11), a sliding pressure plate (12), a spring (13), and a part (14). The connection relationship is as follows: the fixed support plate (1) is provided with a positioning platform, a guide sleeve hole, a shoulder bolt through hole, a sliding pressure plate groove, a limiting through groove, and a contour support platform. The base (2) is provided with a positioning groove. The fixed support plate (1) and the base (2) are in close contact and are limited by bolt locking. The guide sleeve (10) and the guide sleeve hole provided on the fixed support plate (1) are in interference fit and limited by the hanging platform. The base plate (3) is provided with guide post holes, screw holes, upper eccentric shaft holes and lower eccentric shaft holes. The upper eccentric shaft (7) is in surface contact with the upper eccentric shaft hole provided on the base plate (3) and is in surface contact with the lower eccentric shaft hole provided on the base plate (3). The guide post (9) is in surface contact with the guide post hole provided on the base plate (3) and is limited by the mounting platform. The upper lever (4) is provided with a stepped hole. The upper eccentric shaft (7) is in surface contact with the stepped hole provided on the upper lever (4) and is limited by the step. The lower lever (6) is provided with a stepped hole. The lower eccentric shaft (8) is in surface contact with the stepped hole provided on the lower lever (6) and is limited by the step. The upper side of the handle (5) is in surface contact with the upper lever (4) and is limited by the screw. The handle (5) is locked and fixed, and the lower side of the handle (5) is locked and fixed to the lower lever (6) by bolts; the sliding pressure plate (12) is provided with a through groove, a pressure table, a pushing table and a limiting table. The sliding pressure plate (12) is in contact with the sliding pressure plate groove provided on the fixed support plate (1) and slides. The pushing table provided on the sliding pressure plate (12) is used to push it. The limiting table provided on the sliding pressure plate (12) is in contact with the limiting through groove provided on the fixed support plate (1) and limits it. The through groove provided on the sliding pressure plate (12) is stadium-shaped, and the distance between the centers of the two ends is greater than the sliding stroke of the sliding pressure plate (12); the shoulder bolt (11) is in clearance fit with the spring (13). The shoulder bolt (11) is in contact with the sliding pressure plate (12) and is provided with The through slot clearance fits the shoulder bolt (11) and the shoulder bolt through hole on the fixed support plate (1) are fitted with clearance fits. The shoulder bolt (11) is locked and fixed with the screw hole on the base plate (3). In the natural clamping state, the pressure table on the sliding pressure plate (12) contacts the surface of the part (14) and limits the part (14). The part (14) contacts the contour support table on the fixed support plate (1) and limits the part. The distance between the center of the upper eccentric shaft hole and the lower eccentric hole on the base plate (3) and the assembly surface is set as X. The distance between the center of the eccentric shaft hole and the non-assembly surface is set as Y. The difference between X and Y is equal to the gap distance between the fixed support plate (1) and the base plate (3) after the upper lever (4) and the lower lever (6) are rotated.The compression distance of the spring (13) is equal to the gap distance between the fixed support plate (1) and the base plate (3) after the upper lever (4) and lower lever (6) are rotated; the connection relationship when the load force of the integrated measuring fixture is applied is as follows: when the handle (5), upper lever (4) and lower lever (6) are rotated 180 degrees as a whole with the upper eccentric shaft (7) and lower eccentric shaft (8) as the central axis, the upper lever (4) and lower lever (6) are in contact with the fixed support plate (1), the gap distance between the fixed support plate (1) and the base plate (3) is XY, the force applied to the part (14) by the spring (13) is the load force required for the simulated installation of the part (14), and the conversion of various force application states is achieved by installing springs (13) with different elastic coefficients.

2. The integrated measuring fixture according to claim 1, characterized in that: The fixed support plate (1) is provided with a stepped surface, and the base (2) is provided with a stepped positioning groove. Furthermore, the fixed support plate (1) and the base (2) are positioned in three directions.

3. The integrated measuring fixture according to claim 1, characterized in that: A washer is provided between the shoulder bolt (11) and the spring (13), and a washer is provided between the shoulder bolt (11) and the sliding pressure plate (12).

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