A checking fixture

Abstract

The present invention relates to a checking fixture, which includes a detection plate body. The detection plate body has at least three limiting surfaces. Two positioning pins are further provided on the detection plate body. The detection plate body includes a moving plate and a base plate. The angle and position between the moving plate and the base plate are adjustable, and an adjusting mechanism is provided between the moving plate and the base plate. The adjusting mechanism includes a first telescopic rod and a second telescopic rod hinged between the moving plate and the base plate. The outer surfaces of the moving plate, the base plate, the first telescopic rod and the second telescopic rod serve as the limiting surfaces. The positioning pins are inserted into the positioning pin holes of the workpiece to be measured for detecting the positional tolerance between the plane to be measured and the positioning pin holes. The adjusting mechanism can adjust the angle and position between the moving plate and the base plate, so as to perform the positional tolerance detection of different planes and holes.

Description

Technical Field

[0001] The present invention relates to a checking fixture. Background Art

[0002] A position degree checking fixture is used to determine whether the actual contour exceeds the corresponding boundary. The checking fixtures in the prior art can only detect the position degree of a certain plane and holes, and cannot adapt to the detection of the position degrees of different planes and holes. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a checking fixture that can detect the position degrees of different planes and holes.

[0004] To solve the above technical problem, the technical solution of the present invention is: a checking fixture, including a detection plate body, the detection plate body having at least three limiting surfaces, and two positioning pins are further provided on the detection plate body. The detection plate body includes a moving plate and a base plate, the angle and position between the moving plate and the base plate are adjustable, and an adjusting mechanism is provided between the moving plate and the base plate.

[0005] As a preferred technical solution, the adjusting mechanism includes a first telescopic rod and a second telescopic rod hinged between the moving plate and the base plate. The outer surfaces of the moving plate, the base plate, the first telescopic rod and the second telescopic rod serve as the limiting surfaces. Both the first telescopic rod and the second telescopic rod include rod bodies, a guiding hole is provided in the rod body, a movable rod is movably installed in the guiding hole. The cross-sections of the rod body, the movable rod and the guiding hole are all rectangular. On the upper side and the lower side of the hole wall of the guiding hole, limiting grooves parallel to the axis of the guiding hole and communicating with the guiding hole are respectively provided. A pressing block is movably installed in the limiting groove. The movable rod is provided with a through hole extending vertically for the pressing block to insert. The inner surface of the rod body is provided with a guiding groove parallel to the axis of the guiding hole. The movable rod is further provided with a threaded hole perpendicular to the through hole, and a pressing column with an external thread is screwed in the threaded hole. The inner end of the pressing column is a cone, and one end of the pressing block inserted into the through hole has an inclined surface cooperating with the cone.

[0006] As a preferred technical solution, a limiting sleeve is sleeved outside the movable rod. The cross-section of the limiting sleeve is also rectangular. The length of the cross-section of the limiting sleeve is equal to the length of the cross-section of the rod body, and the width of the cross-section of the limiting sleeve is equal to the width of the cross-section of the rod body.

[0007] As a preferred technical solution, a third telescopic rod is also hinged to the middle of the detection plate body. The third telescopic rod includes a sleeve with internal threads, a stud is installed inside the sleeve, an installation guide groove extending along the length direction of the substrate is provided on the substrate, a slider is movably installed in the installation guide groove, a rotating seat is rotatably installed on the slider, a blind hole is provided on the rotating seat, and a position locking mechanism is provided between the slider and the installation guide groove.

[0008] As a preferred technical solution, third telescopic rods are also hinged to the rod bodies of the second telescopic rod and the first telescopic rod. The sliders corresponding to the third telescopic rods hinged to the first telescopic rod and the second telescopic rod are provided in the installation guide groove. The rotating seat is rotatably installed on the slider, a blind hole is provided on the rotating seat, the blind hole has internal threads for cooperating with the stud, and a position locking mechanism is provided between the slider and the installation guide groove.

[0009] As a preferred technical solution, a nut is screwed on the stud of the third telescopic rod, and the nut abuts against the end face of the sleeve.

[0010] As a preferred technical solution, a lubricating oil passage is opened on the pressing block, and the inner port of the lubricating oil passage is opened on the conical surface of the cone at the inner end of the pressing column.

[0011] Due to the adoption of the above technical solution, a measuring tool includes a detection plate body. The detection plate body has at least three limiting surfaces, two positioning pins are further provided on the detection plate body. The detection plate body includes a moving plate and a substrate. The angle and position between the moving plate and the substrate are adjustable, and an adjusting mechanism is provided between the moving plate and the substrate. The positioning pins are inserted into the positioning pin holes of the workpiece to be measured for detecting the positional tolerance between the plane to be measured and the positioning pin holes. The adjusting mechanism can adjust the angle and position between the moving plate and the substrate, so that the positional tolerance of different planes and holes can be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0014] Figure 2 is a schematic structural diagram of the first telescopic rod and the second telescopic rod in an embodiment of the present invention;

[0015] Figure 3 This is a cross-sectional view of the first telescopic rod and the second telescopic rod in an embodiment of the present invention. Detailed implementation manners

[0016] As Figures 1-3 shown, a fixture includes a detection plate body 3. The detection plate body has at least three limiting surfaces 2. Two positioning pins 4 are further provided on the plate body. The detection plate body includes a moving plate and a base plate. The angle and position between the moving plate and the base plate are adjustable, and an adjusting mechanism is provided between the moving plate and the base plate. The positioning pins are inserted into the positioning pin holes of the workpiece to be measured for detecting the positional tolerance between the plane to be measured and the positioning pin holes. The adjusting mechanism can adjust the angle and position between the moving plate and the base plate, so as to detect the positional tolerance of different planes and holes.

[0017] The adjusting mechanism includes a first telescopic rod 5 and a second telescopic rod 6 hinged between the moving plate and the base plate 1. The positioning pins are provided on the base plate. The outer surfaces of the moving plate, the base plate, the first telescopic rod and the second telescopic rod serve as the limiting surfaces. Both the first telescopic rod 5 and the second telescopic rod 6 include a rod body 7. A guiding hole is provided in the rod body 7. A movable rod 9 is movably installed in the guiding hole. The cross-sections of the rod body 7, the movable rod 9 and the guiding hole are all rectangular. Upper and lower sides of the hole wall of the guiding hole are respectively provided with limiting grooves 10 parallel to the axis of the guiding hole and communicating with the guiding hole. A pressing block 11 is movably installed in the limiting groove 10. The movable rod is provided with a through hole 13 extending vertically for the pressing block to insert. An inner side surface of the rod body is provided with a guiding groove 14 parallel to the axis of the guiding hole. The movable rod 9 is further provided with a threaded hole perpendicular to the through hole. A pressing column 15 with an external thread is screwed in the threaded hole. The inner end of the pressing column is a cone 16. One end of the pressing block 11 inserted into the through hole has an inclined surface 17 cooperating with the cone. By rotating the pressing column, due to the cooperation between the pressing column and the threaded hole, and the inner end of the pressing column being a cone, the cone presses down on the inclined surface of the pressing block, pushing the pressing block to press tightly in the limiting groove, thereby realizing the locking of the relative position between the movable rod and the guiding hole. Multiple pressing columns and threaded holes can also be provided as needed to further enhance the strength and stiffness.

[0018] A limiting sleeve 25 is sleeved outside the movable rod. The cross-section of the limiting sleeve 25 is also rectangular. The length of the cross-section of the limiting sleeve is equal to the length of the cross-section of the rod body, and the width of the cross-section of the limiting sleeve is equal to the width of the cross-section of the rod body. The cross-section sizes of the limiting sleeve and the rod body are the same. The limiting sleeve can move along the movable rod, so as to change the position of the sleeve on the movable rod, and thus the side surface of the limiting sleeve can also be used as a limiting surface.

[0019] A third telescopic rod 19 is also hinged to the middle of the detection plate body. The third telescopic rod includes a sleeve 20 with internal threads. A stud 21 is installed inside the sleeve. An installation guiding groove 22 extending along the length direction of the substrate is provided on the substrate. A slider 23 is movably installed in the installation guiding groove. A rotating seat 24 is rotatably installed on the slider. A blind hole is provided on the rotating seat. The blind hole has internal threads for mating with the stud. A position locking mechanism is provided between the slider and the installation guiding groove. The setting of the third telescopic rod improves the strength and stiffness of the detection plate body.

[0020] Third telescopic rods are also hinged to the rod bodies of the second telescopic rod 6 and the first telescopic rod 5. The installation guiding groove is provided with the corresponding sliders 23 for the third telescopic rods hinged to the first telescopic rod and the second telescopic rod. The rotating seat is rotatably installed on the slider. A blind hole is provided on the rotating seat. The blind hole has internal threads for mating with the stud. A position locking mechanism is provided between the slider and the installation guiding groove. A nut 26 is screwed on the stud of the third telescopic rod. The nut abuts against the end face of the sleeve. The setting of the third telescopic rod improves the strength and stiffness of the detection plate body, thereby improving the strength and stiffness of the inspection tool. The nut can play a limiting role, preventing the stud from loosening and ensuring the strength and stiffness. The installation guiding groove can adopt an inverted trapezoidal groove. The slider is provided with a threaded through hole. The position locking mechanism includes a tightening bolt screwed in the threaded through hole. The end of the tightening bolt abuts against the bottom surface of the inverted trapezoidal groove.

[0021] A lubricating oil passage is opened on the pressing block. The inner port of the lubricating oil passage is opened on the conical surface of the cone at the inner end of the pressing column. Lubrication is achieved, ensuring the smooth relative movement of the pressing column and the pressing block.

[0022] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A checking fixture, characterized in that, it includes a detection plate body, the detection plate body has at least three limiting surfaces, two positioning pins are also provided on the detection plate body, the detection plate body includes a moving plate and a base plate, the angle and position between the moving plate and the base plate are adjustable, and an adjusting mechanism is provided between the moving plate and the base plate; The adjusting mechanism includes a first telescopic rod and a second telescopic rod hinged between the moving plate and the base plate. The outer surfaces of the moving plate, the base plate, the first telescopic rod and the second telescopic rod serve as the limiting surfaces. Both the first telescopic rod and the second telescopic rod include rod bodies, a guiding hole is provided in the rod body, a movable rod is movably installed in the guiding hole, and the cross-sections of the rod body, the movable rod and the guiding hole are all rectangular. Limiting grooves parallel to the axis of the guiding hole and communicating with the guiding hole are respectively provided on the upper side and the lower side of the hole wall of the guiding hole. A pressing block is movably installed in the limiting groove. The movable rod is provided with a through hole extending vertically for the pressing block to insert. A guiding groove parallel to the axis of the guiding hole is provided on the inner surface of the rod body. A threaded hole perpendicular to the through hole is also provided on the movable rod. A pressing column with an external thread is screwed in the threaded hole. The inner end of the pressing column is a cone, and one end of the pressing block inserted into the through hole has an inclined surface matching the cone; A limiting sleeve is sleeved outside the movable rod, the cross-section of the limiting sleeve is also rectangular, the length of the cross-section of the limiting sleeve is equal to the length of the cross-section of the rod body, and the width of the cross-section of the limiting sleeve is equal to the width of the cross-section of the rod body; A third telescopic rod is also hinged in the middle of the detection plate body. The third telescopic rod includes a sleeve with internal threads. A stud is installed in the sleeve. An installation guiding groove extending along the length direction of the base plate is provided on the base plate. A slider is movably installed in the installation guiding groove. A rotating seat is rotatably installed on the slider. A blind hole is provided on the rotating seat. A position locking mechanism is provided between the slider and the installation guiding groove; Third telescopic rods are also hinged on the rod bodies of the second telescopic rod and the first telescopic rod. The sliders corresponding to the third telescopic rods hinged on the first telescopic rod and the second telescopic rod are provided in the installation guiding groove. A rotating seat is rotatably installed on the slider. A blind hole is provided on the rotating seat. The blind hole has internal threads matching the stud. A position locking mechanism is provided between the slider and the installation guiding groove; A lubricating oil passage is opened on the pressing block, and the inner port of the lubricating oil passage is opened on the conical surface of the cone at the inner end of the pressing column.

2. The checking fixture according to claim 1, characterized in that: A nut is screwed on the stud of the third telescopic rod, and the nut abuts against the end face of the sleeve.

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