CN211626367U - High-precision symmetry detection device - Google Patents

Abstract

The utility model belongs to the technical field of a part detection device of a switch machine, in particular to a high-precision symmetry degree detection device; comprises a supporting seat, a conical centering component, an angle detection rod, a butt inserted shaft and a movable sleeve; the supporting seat comprises a vertical centering shaft fixing plate, the lower end of the centering shaft fixing plate extends to form a horizontal bottom plate, and the upper surface of the bottom plate is a bottom plate measuring surface; the conical centering assembly comprises a conical centering shaft, a movable jacking block and a centering guide block which are assembled together, and two movable sleeves capable of sliding in the opposite direction along the horizontal direction are further mounted on one side of a centering shaft fixing plate; the angle detection rod is parallel to the fixed plate of the centering shaft and is arranged above the bottom plate, the upper end of the angle detection rod can be rotatably arranged at the tail end of the conical centering shaft, and the lower end of the angle detection rod is detachably provided with a butt inserted shaft; the utility model discloses can solve among the prior art and carry out the unreliable problem of testing result when the symmetry detects to the fast-moving piece.

Description

High-precision symmetry detection device

Technical Field

The utility model belongs to the technical field of goat part detection device, especially, relate to a high accuracy symmetry detection device.

Background

The quick acting piece is a key action component for connecting point on-off composed of a connecting point seat of a railway signal switch machine product, the appearance of the quick acting piece is circular, the upper end of an excircle is provided with a U-shaped opening symmetrical about the circle center, and an arc-shaped long circular hole symmetrical with the U-shaped opening and the circle center at the same time is arranged on the circular ring at the other side opposite to the U-shaped opening; according to the assembly action requirement, detecting the angle symmetry degree of the arc-shaped long circular hole and the U-shaped opening to the central hole; because the dimensional tolerance of the central hole and the U-shaped opening is large, the workpiece cannot be accurately positioned in a common positioning mode, and the detection result is unreliable, so that a detection device capable of accurately positioning the workpiece needs to be designed to meet the requirement.

Disclosure of Invention

In view of this, the utility model aims at providing a high accuracy symmetry detection device to because the commonly used locate mode can't realize the accurate positioning to the work piece when solving among the prior art and carrying out the symmetry to the fast-moving piece, lead to the insecure problem of testing result.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a high-precision symmetry detection device comprises a supporting seat, a conical centering assembly, an angle detection rod, a butt inserted shaft and a movable sleeve;

the workpiece to be detected is a quick-acting sheet of a point switch, the appearance of the workpiece to be detected is annular, the center of the workpiece to be detected is a detection mounting hole, the upper end of the outer edge is provided with a U-shaped opening which is symmetrical about the circle center, and the outer edge of the other side opposite to the U-shaped opening is provided with an arc-shaped long round hole which is symmetrical with the U-shaped opening and the circle center at the same time;

the supporting seat comprises a vertical centering shaft fixing plate, the lower end of the centering shaft fixing plate extends to form a horizontal bottom plate, the upper surface of the bottom plate is a bottom plate measuring surface, and the bottom plate measuring surface is perpendicular to the centering shaft fixing plate;

the conical centering assembly comprises a conical centering shaft, a movable jacking block and a centering guide block which are assembled together, the conical centering shaft vertically penetrates through and is rotatably mounted in a centering shaft fixing plate, the outer contour of the centering guide block is circular, the diameter of the centering guide block is smaller than the aperture of a detection mounting hole of the quick-acting piece, a centering shaft mounting hole is formed in the center of the centering guide block, the tail end of the conical centering shaft penetrates through the centering shaft mounting hole to enable the centering guide block to be mounted on the conical centering shaft, and meanwhile, a plurality of movable jacking blocks capable of sliding along the radial direction of the centering guide block are movably mounted in the centering guide block;

one side of the fixed plate of the centering shaft is also provided with two movable sleeves which can slide oppositely along the horizontal direction, and the movable sleeves are positioned above the conical centering component;

the angle detection rod is parallel to the fixed plate of the centering shaft and is arranged above the bottom plate, the upper end of the angle detection rod can be rotatably arranged at the tail end of the conical centering shaft, the left side surface and the right side surface of the angle detection rod are respectively a left angle detection surface and a right angle detection surface which are vertical to the plate surface of the fixed plate of the centering shaft, and the left angle detection surface and the right angle detection surface are parallel; the lower extreme demountable installation of angle detection pole has a butt axle of inserting, and the front end of butt axle of inserting is equipped with a butt head, and the inboard at angle detection pole is installed to the butt head.

Furthermore, the waist part of the conical centering shaft is a rotary mounting section, the rotary mounting section is rotatably mounted in the centering shaft fixing plate through a bearing, the bearing outer ring is in interference fit with a bearing mounting hole in the centering shaft fixing plate, and the bearing inner ring is in clearance fit with the rotary mounting section.

Furthermore, a plurality of sliding through grooves distributed along the radial direction are formed in the end face of one side of the centering guide block, and the sliding through grooves are communicated with the centering shaft mounting hole; the upper end of the movable top block is provided with a contact, and the lower end surface of the movable top block is a matched sliding inclined surface; the conical centering shaft is of an integrally formed multi-section stepped shaft-shaped structure, a conical centering section and a guide block mounting section are sequentially arranged beside the rotary mounting section, the conical centering section is provided with a guide sliding conical surface corresponding to the movable ejector block, and the inclination angle of the guide sliding conical surface is consistent with that of the matched sliding inclined surface; the diameter of the guide block mounting section is matched with the aperture of the centering shaft mounting hole; the guide block mounting section of the conical centering shaft is sleeved in the centering shaft mounting hole, the movable ejector block is positioned in the sliding through groove, and meanwhile, the guide sliding conical surface is attached to the matched sliding inclined surface.

Furthermore, the conical centering assembly also comprises a cover plate which is an annular plate, the conical centering shaft penetrates through a center hole of the cover plate, and meanwhile, the cover plate is plugged and installed on one side of the centering guide block, which is provided with a sliding through groove, through a connecting screw, so that the movable jacking block is plugged and installed in the sliding through groove; the movable top block is provided with a movable hole; the connecting screw penetrates through the cover plate, the movable hole and the centering guide block in sequence, wherein the movable hole is a long round hole.

Furthermore, the end face of the contact is a hemispherical surface, and in addition, the conical centering shaft is detachably and fixedly connected into the centering shaft fixing plate through a locking nut.

Furthermore, two guide pins are detachably installed on one side of the fixed plate of the centering shaft in a penetrating mode, the connecting line of the centers of the two guide pins is parallel to the measuring surface of the bottom plate, and each guide pin comprises a threaded end, a movable sleeve installation section and a pin cap fixedly connected to one end of the movable sleeve installation section; the movable sleeve is sleeved on the movable sleeve mounting section, and meanwhile, the tail end of the guide pin penetrates through the fixed plate of the centering shaft and the threaded end is screwed with a nut.

The movable sleeve mounting section is provided with two binding surfaces which extend along the axial direction and are parallel to each other, the movable sleeve is provided with a guide pin mounting hole with an oblong cross section, and the binding surfaces are bound with the upper and lower plane inner walls of the guide pin mounting hole when the movable sleeve is sleeved on the movable sleeve mounting section; the fixed plate of the centering shaft is provided with a conical slide block which can slide up and down along the vertical direction, the conical slide block is provided with two extruding inclined planes which are symmetrical left and right, and the two extruding inclined planes are respectively abutted against the outer surface of the movable sleeve.

Furthermore, the rear end of the conical sliding block is also provided with a guide end, a strip-shaped guide limiting hole extending along the vertical direction is formed in the centering shaft fixing plate, and the guide end penetrates through the guide limiting hole.

Furthermore, the upper end of the fixed plate of the centering shaft extends to one side to form a horizontal pull rod fixed plate, and a pull rod mounting hole is formed in the pull rod fixed plate; the pull rod fixing device is characterized by also comprising a knurled screw, wherein the upper end of the knurled screw is provided with a knurled head, the lower end of the knurled screw is provided with an arc-shaped limiting groove extending along the circumferential direction, the knurled screw is screwed in the pull rod mounting hole in a penetrating manner, and the lower end of the knurled screw is rotatably inserted in the conical sliding block;

a pull rod hole which is vertically communicated is formed in the conical sliding block, and a limit screw mounting hole is also formed in the conical sliding block; the limiting screw mounting hole is vertical to the pull rod hole and does not penetrate through the pull rod hole completely; the lower extreme of annular knurl screw inserts in the pull rod hole, and the downthehole stop screw that has inserted of stop screw mounting hole simultaneously, the local card of stop screw is in the arc spacing inslot of annular knurl screw.

Furthermore, the tail end of the conical centering shaft is provided with a detection rod mounting hole, the upper end of the angle detection rod is provided with a centering connecting column perpendicular to the angle detection rod, the centering connecting column is inserted into the detection rod mounting hole and is in clearance fit with the detection rod mounting hole, and an exhaust hole which is communicated along the axial direction is formed in the centering connecting column.

Furthermore, the lower end of the angle detection rod is provided with an abutting insertion shaft mounting hole which is a long round hole, the abutting insertion shaft comprises a threaded connection section, an abutting head is arranged at one end of the threaded connection section, the threaded connection section penetrates through the abutting insertion shaft mounting hole, and a fastening nut is screwed on the threaded connection section; in addition, the abutting head is of a conical block structure.

Compared with the prior art, the utility model discloses following advantage has:

the device is a high-precision symmetry detection device with strong universality, can realize gapless positioning on a workpiece specially aiming at the workpiece with a special shape of a quick acting sheet, sequentially realize centering, rotation prevention and measurement on the workpiece when the workpiece is clamped, adopts different positioning structures to support in a detection mounting hole, a U-shaped opening and an arc long circular hole of the quick acting sheet in a gapless manner respectively, is not influenced by the size of the aperture of the workpiece, can be matched with the quick acting sheet workpiece with a wide range of sizes, has strong universality, can realize gapless support on each mounting hole, has stable structure and strong reliability, is convenient to operate, and greatly improves the working efficiency; because the workpiece is accurately positioned, the detection result is accurate and reliable, and the measurement precision is improved.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view at section A of FIG. 1;

FIG. 3 is a cross-sectional view at section B of FIG. 1;

FIG. 4 is a schematic structural view of the supporting base;

FIG. 5 is a cross-sectional view at section C of FIG. 4;

FIG. 6 is a schematic structural view of a tapered centering shaft;

FIG. 7 is a schematic structural view of a cover plate;

FIG. 8 is a schematic structural view of a movable top block;

FIG. 9 is a side view of the movable top block of FIG. 8;

FIG. 10 is a schematic structural view of a centering guide block;

FIG. 11 is a schematic view of the guide pin;

FIG. 12 is a left side elevational view of the guide pin of FIG. 11;

FIG. 13 is a schematic view of the structure of the condom;

FIG. 14 is a top view of the holster of FIG. 13;

FIG. 15 is a schematic structural view of a tapered slider;

FIG. 16 is a left side view of the tapered slider of FIG. 15;

FIG. 17 is a top view of the tapered slider of FIG. 15;

FIG. 18 is a schematic view of a knurled screw;

FIG. 19 is a schematic view of the angle detecting lever;

FIG. 20 is a left side elevational view of the angle sensing lever of FIG. 19;

FIG. 21 is a schematic view of the abutting shaft;

fig. 22 is a schematic structural view of a snap-action tab.

Description of reference numerals:

1-a snap-action tablet; 11-detecting the mounting hole; 12-U-shaped opening; 13-arc long round hole; 2-a support seat; 21-a fixed plate of a centering shaft; 211-guide limit holes; 22-a tie rod fixing plate; 221-a tie rod mounting hole; 23-a base plate; 231-floor measuring level; 31-a tapered centering shaft; 311-a thread locking section; 312-a rotational mounting section; 313-a conical centering section; 314-a guide block mounting section; 3131-a guided sliding cone; 3132-test rod mounting holes; 32-a cover plate; 321-a central hole; 33-a movable top block; 331-a movable hole; 332-mating glide slope; 333-contact; 34-a centering guide block; 341-centering shaft mounting hole; 342-a sliding through groove; 35-a bearing; 36-a connection screw; 37-a locking nut; 4-angle detecting lever; 41-centering connecting column; 411-vent hole; 42-abutting the insert shaft mounting hole; 43-left angle detection plane; 44-right angle detection plane; 5-abutting the insert shaft; 51-an abutment head; 52-a threaded connection section; 53-a fastening nut; 6-a conical slider; 61-extruding the inclined plane; 62-tie rod hole; 63-limiting screw mounting holes; 64-a guide end; 7-knurled screw; 71-arc limiting groove; 8-a guide pin; 81-a threaded end; 82-a movable sleeve mounting section; 821-a binding surface; 83-pin cap; 9-a movable sleeve; 91-guide pin mounting hole.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 22, a high precision symmetry detection apparatus is characterized in that: comprises a supporting seat 2, a conical centering component, an angle detection rod 4, an abutting inserted shaft 5 and a movable sleeve 9.

The workpiece to be detected is a quick-acting piece 1 of a point switch, the appearance of the quick-acting piece is circular, the center of the quick-acting piece is a detection mounting hole 11, the upper end of the outer edge is provided with a U-shaped opening 12 which is symmetrical about the circle center, and the outer edge of the other side opposite to the U-shaped opening 12 is provided with an arc-shaped long round hole 13 which is symmetrical with the U-shaped opening 12 and the circle center at the same time (as shown in figure 22).

The supporting seat 2 includes a vertical centering shaft fixing plate 21, a horizontal bottom plate 23 is formed by extending the lower end of the centering shaft fixing plate 21, the upper surface of the bottom plate 23 is a bottom plate measuring surface 231, and the bottom plate measuring surface 231 is perpendicular to the centering shaft fixing plate 21 (as shown in fig. 4-5).

The conical centering assembly comprises a conical centering shaft 31, a movable top block 33 and a centering guide block 34 which are assembled together, wherein the conical centering shaft 31 vertically penetrates through and is rotatably installed in a centering shaft fixing plate 21, specifically, the waist part of the conical centering shaft 31 is a rotating installation section 312, the rotating installation section 312 is rotatably installed in the centering shaft fixing plate 21 through a bearing 35, an outer ring of the bearing 35 is in interference fit with a bearing installation hole in the centering shaft fixing plate 21, and an inner ring of the bearing 35 is in clearance fit with the rotating installation section 312, so that the conical centering shaft 31 can horizontally move in the axial direction besides the self-rotation.

The outer contour of the centering guide block 34 is circular, the diameter of the centering guide block is smaller than the aperture of the detection mounting hole 11 of the quick acting plate 1, a centering shaft mounting hole 341 is formed in the center of the centering guide block 34, the tail end of the conical centering shaft 31 penetrates through the centering shaft mounting hole 341 so that the centering guide block 34 is mounted on the conical centering shaft 31, and meanwhile, a plurality of movable jacking blocks 33 capable of sliding along the radial direction of the centering guide block 34 are mounted in the centering guide block 34.

Preferably, as shown in fig. 10, a plurality of sliding through grooves 342 distributed along the radial direction are formed on one side end surface of the centering guide block 34, and the sliding through grooves 342 are communicated with the centering shaft mounting hole 341; as shown in fig. 8 to 9, the upper end of the movable top block 33 is provided with a contact 333, and the lower end surface of the movable top block 33 is provided with a mating sliding inclined surface 332. As shown in fig. 6, the conical centering shaft 31 is an integrally formed multi-section stepped shaft-shaped structure, a conical centering section 313 and a guide block mounting section 314 are sequentially arranged beside the rotary mounting section 312, the conical centering section 313 is provided with a guide sliding conical surface 3131 corresponding to the movable top block 33, the inclination angle of the guide sliding conical surface 3131 is consistent with that of the matching sliding inclined surface 332, and it is ensured that the two surfaces can be completely attached after assembly; the diameter of the guide block mounting section 314 is matched with the aperture of the centering shaft mounting hole 341; the guide block mounting section 314 of the tapered centering shaft 31 is sleeved in the centering shaft mounting hole 341, the movable top block 33 is positioned in the sliding through groove 342, and the guide sliding conical surface 3131 is attached to the matching sliding inclined surface 332.

Further, the conical centering assembly further comprises a cover plate 32, the cover plate 32 is an annular plate (as shown in fig. 7), the conical centering shaft 31 passes through the central hole 321 of the cover plate 32, and the movable top block 33 is mounted in the sliding through groove 342 by plugging the cover plate 32 on the side of the centering guide block 34 provided with the sliding through groove 342 through the connecting screw 36; the movable top block 33 is provided with a movable hole 331; the connecting screw 36 sequentially penetrates through the cover plate 32, the movable hole 331 and the centering guide block 34, wherein the movable hole 331 is a long round hole, so that the movable top block 33 has a certain degree of freedom while being limited by the connecting screw 36, and is convenient to slide along a channel in the sliding through groove 342.

Preferably, the end face of the contact 333 is a hemispherical surface, and the end face of the contact 333 is designed to be a hemispherical surface, so that after the workpiece is installed, the contact 333 is in point contact with the hole wall of the detection installation hole 11, and thus, the device can be matched with the workpiece of the quick acting plate 1 with a wide range of sizes, is not influenced by the size of the hole diameter of the detection installation hole 11 of the workpiece, and has strong universality. In addition, the tapered centering shaft 31 is detachably and fixedly connected in the centering shaft fixing plate 21 by a lock nut 37; specifically, the tapered centering shaft 31 is terminated by a thread locking section 311, the tapered centering shaft 31 penetrates through the centering shaft fixing plate 21, and the lock nut 37 is screwed on the thread locking section 311, so that the centering shaft fixing plate 21 is pressed between the cover plate 32 and the lock nut 37.

One side of the centering shaft fixing plate 21 is also provided with two movable sleeves 9 which can slide in the horizontal direction in opposite directions, and the movable sleeves 9 are positioned above the conical centering component; specifically, two guide pins 8 are detachably mounted on one side of the fixed plate 21 of the centering shaft in a penetrating manner, and a connecting line of the axes of the two guide pins 8 is parallel to the bottom plate measuring surface 231; as shown in fig. 11-12, the guide pin 8 comprises a threaded end 81, a movable sleeve mounting section 82 and a pin cap 83 fixedly connected to one end of the movable sleeve mounting section 82; the movable sleeve 9 is sleeved on the movable sleeve mounting section 82, meanwhile, the tail end of the guide pin 8 penetrates through the fixed centering shaft plate 21, a nut is screwed on the threaded end 81 to prevent the guide pin 8 from falling off from the fixed centering shaft plate 21, the movable sleeve 9 is positioned inside the pin cap 83, and the movable sleeve 9 is prevented from falling off from the guide pin 8 through the blocking of the pin cap 83 (as shown in fig. 3). Preferably, the movable sleeve mounting section 82 is provided with two abutting surfaces 821 (shown in fig. 12) extending in the axial direction and parallel to each other, the movable sleeve 9 is provided with a guide pin mounting hole 91 (shown in fig. 14) with an oblong cross section, the movable sleeve 9 is sleeved on the movable sleeve mounting section 82, the abutting surfaces 821 are abutted to the upper planar inner wall and the lower planar inner wall of the guide pin mounting hole 91, and during machining, the length of the oblong cross section of the guide pin mounting hole 91 needs to be slightly larger, so that the movable sleeve 9 can be conveniently sleeved on the guide pin 8 and can be translated for a certain distance along the abutting surfaces 821.

Meanwhile, a tapered slider 6 capable of sliding up and down along the vertical direction is further installed on one side of the fixed plate 21 of the centering shaft, the tapered slider 6 is provided with two bilaterally symmetrical extrusion inclined surfaces 61 (as shown in fig. 15), the two extrusion inclined surfaces 61 are respectively abutted to the outer surfaces of the movable sleeves 9, and when the tapered slider 6 moves down, the two extrusion inclined surfaces 61 simultaneously extrude the two movable sleeves 9 to the outside, so that the two movable sleeves 9 can slide in opposite directions along the joint surface 821 (i.e., the horizontal direction) of the guide pin 8.

Preferably, the rear end of the tapered slider 6 is further provided with a guide end 64 (as shown in fig. 17), an elongated guide limiting hole 211 extending in the vertical direction is formed in the centering shaft fixing plate 21, and the guide end 64 penetrates through the guide limiting hole 211. The guide limiting hole 211 is arranged to limit the guide of the conical sliding block 6 when the conical sliding block moves, so that the conical sliding block can move in the vertical direction and is prevented from deviating.

The upper end of the centering shaft fixing plate 21 extends to one side to form a horizontal pull rod fixing plate 22, and a pull rod mounting hole 221 is formed in the pull rod fixing plate 22; the pull rod fixing device further comprises a knurled screw 7, a knurled head is arranged at the upper end of the knurled screw 7, the knurled screw 7 is screwed in the pull rod mounting hole 221 in a penetrating mode, and meanwhile the lower end of the knurled screw 7 can be rotatably inserted into the conical sliding block 6 in a rotatable mode.

Preferably, the lower end of the knurled screw 7 is provided with an arc-shaped limiting groove 71 (as shown in fig. 18) extending along the circumferential direction, the conical sliding block 6 is provided with a pull rod hole 62 penetrating vertically, and the conical sliding block 6 is further provided with a limiting screw mounting hole 63; the limit screw mounting hole 63 is perpendicular to the pull rod hole 62 and does not completely penetrate through the pull rod hole (as shown in fig. 17); in the lower extreme of knurling screw 7 inserted draw rod hole 62, a stop screw has been inserted in stop screw mounting hole 63 simultaneously, the local card of stop screw is in the arc spacing groove 71 of knurling screw 7 (both contact site have the clearance), make conical sliding block 6 firm connection at knurling screw 7 lower extreme while the lower extreme of knurling screw 7 rotatable install in draw rod hole 62, through rotatory knurling screw 7, knurling screw 7 can drive conical sliding block 6 and reciprocate and guarantee that conical sliding block 6 does not rotate.

The angle detection rod 4 is installed above the bottom plate 23 in parallel to the centering shaft fixing plate 21, and the upper end of the angle detection rod 4 is rotatably installed at the tail end of the conical centering shaft 31, specifically, the tail end of the conical centering shaft 31 is provided with a detection rod installation hole 3132, the upper end of the angle detection rod 4 is provided with a centering connection column 41 perpendicular to the angle detection rod 4, the centering connection column 41 is inserted into the detection rod installation hole 3132 and is in clearance fit with the detection rod installation hole 3132, so that the upper end of the angle detection rod 4 is rotatably installed at the tail end of the conical centering shaft 31, preferably, an air exhaust hole 411 which is through along the axial direction is formed in the centering connection column 41, when the centering connection column 41 is installed, air in the detection rod installation hole 3132 is exhausted, and the centering connection column 41 is conveniently and.

The left side surface and the right side surface of the angle detection rod 4 are respectively a left angle detection surface 43 and a right angle detection surface 44 which are vertical to the plate surface of the fixed plate 21 of the centering shaft, and the left angle detection surface 43 and the right angle detection surface 44 are parallel; the lower end of the angle detection rod 4 is detachably provided with a butt insertion shaft 5, the front end of the butt insertion shaft 5 is provided with a butt head 51, and the butt head 51 is arranged on the inner side of the angle detection rod 4. As shown in fig. 19 to 21, specifically, the lower end of the angle detecting rod 4 is provided with an abutting insertion shaft mounting hole 42, the abutting insertion shaft mounting hole 42 is an oblong hole, the abutting insertion shaft 5 includes a section of threaded connection section 52, an abutting head 51 is arranged at one end of the threaded connection section 52, the threaded connection section 52 penetrates through the abutting insertion shaft mounting hole 42, a fastening nut 53 is screwed on the threaded connection section 52, the abutting insertion shaft 5 is detachably and fixedly mounted at the lower end of the angle detecting rod 4 through the fastening nut 53, after the fastening nut 53 is screwed, the fastening nut 53 is pressed on one side of the angle detecting rod 4, and the abutting head 51 is pressed on the other side of the angle detecting rod 4; in addition, the abutment head 51 has a tapered block structure.

When the device is used for detecting the symmetry degree of a workpiece, the device is placed on a horizontal workbench, a conical centering assembly is assembled firstly, namely a conical centering shaft 31, a cover plate 32, a movable top block 33 and a centering guide block 34 are assembled together, the centering guide block 34 is arranged on the conical centering shaft 31 firstly, specifically, a guide block mounting section 314 of the conical centering shaft 31 is sleeved in a centering shaft mounting hole 341 and is in interference fit with the conical centering shaft mounting hole and the conical centering shaft mounting hole, then the movable top blocks 33 are correspondingly placed in sliding through grooves 342 of the centering guide blocks 34 one by one, the cover plate 32 is sleeved on the conical centering shaft 31, the cover plate 32 is plugged and mounted on one side of the centering guide block 34 provided with the sliding through grooves 342 through connecting screws 36, the movable top blocks 33 are plugged and mounted in the sliding through grooves 342, the connecting screws 36 sequentially penetrate through the cover plate 32, the movable holes 331 and the centering guide block 34, and the movable holes 331 are oblong holes, the movable top block 33 is limited by the connecting screw 36 and has a certain degree of freedom, so that the movable top block can conveniently slide along the channel in the sliding through groove 342.

The conical centering assembly is then mounted in the centering shaft fixing plate 21: the bearing 35 is installed in the centering shaft fixing plate 21 in advance, the rotating installation section 312 of the conical centering shaft 31 is inserted into the inner hole of the bearing 35, and the inner ring of the bearing 35 is in clearance fit with the rotating installation section 312, so that the conical centering shaft 31 can horizontally move along the axial direction besides can rotate per se. Thereafter, the tapered centering shaft 31 is attached in the centering shaft fixing plate 21 by the lock nut 37. When mounting the union nut 37, care is taken that firstly the union nut 37 is not completely screwed onto the threaded union section 311.

Then, the quick acting piece 1 to be detected is sleeved outside the centering guide block 34, during installation, attention is paid to enable the two movable sleeves 9 to be positioned in the U-shaped opening 12 of the workpiece, the locking nut 37 is gradually screwed, in the process, the conical centering shaft 31 is axially displaced, the guiding sliding conical surface 3131 is forced to be in press fit with the sliding inclined surface 332, the movable top block 33 is enabled to be outwards diffused and moved along the sliding through groove 342 until the contact 333 of the movable top block 33 tightly abuts against the wall of the detection installation hole 11, and therefore gapless centering is achieved on the workpiece; the centering structure is not influenced by the aperture size of the detection mounting hole 11 of the workpiece, can position and clamp the detection mounting hole 11 with any size in a certain range, can be matched with the workpiece of the quick-acting sheet 1 with a wide range of sizes, has strong universality and convenient operation, can realize gapless support of multiple points of the hole wall of the detection mounting hole 11, and has stable structure and strong reliability.

After the work piece centering, the work piece of waiting to examine this moment can only rotate along with bearing 35 around the axle center, need further realize preventing changeing the location to it, rotatory annular knurl screw 7, annular knurl screw 7 drives tapered slide 6 and moves down, two extrusion inclined planes 61 of tapered slide 6 extrude two movable sleeves 9 to the outside simultaneously, make two movable sleeves 9 slide in opposite directions along binding face 821 (the horizontal direction) of uide pin 8, until movable sleeve 9 extrudees the U-shaped opening 12 lateral wall of work piece, the U-shaped opening 12 of waiting to examine the work piece can rotate automatic adjustment along with the extrusion of two movable sleeves 9 around bearing 35 axle center, until with two lateral walls of waiting to examine the U-shaped opening 12 of work piece contact simultaneously, accomplish the clamping of waiting to examine the work piece this moment, work piece fixed mounting has been in supporting seat 2.

After the clamping of the workpiece is completed, the abutment insertion shaft 5 is attached to the lower end of the angle detection rod 4, the abutment insertion shaft 5 is inserted through the abutment insertion shaft attachment hole 42, and the fastening nut 53 is screwed to the threaded connection section 52, but is not completely screwed.

And finally, measuring the symmetry, inserting the centering connecting column 41 at the upper end of the angle detecting rod 4 carrying the butting inserting shaft 5 into the detecting rod mounting hole 3132 at the tail end of the conical centering shaft 31, enabling the angle detecting rod 4 to freely swing under the action of external force through clearance fit between the centering connecting column and the detecting rod mounting hole 3132, enabling the butting head 51 of the butting inserting shaft 5 to be inserted into the arc-shaped long circular hole 13 of the quick acting piece 1, and then adjusting the position of the butting head 51 in the arc-shaped long circular hole 13 to measure.

During measurement, two angle values need to be measured, the angle detection rod 4 is firstly shifted to enable the abutting head 51 to abut against the left end of the arc-shaped long circular hole 13 (due to the fact that the abutting head 51 is of a conical block-shaped structure, gapless positioning of the arc-shaped long circular hole 13 can be achieved), the fastening nut 53 is screwed, and at the moment, the angle between the left angle detection surface 43 and the bottom plate measurement surface 231 is measured and recorded by the universal angle ruler; then loosening the fastening nut 53, shifting the angle detection rod 4 to enable the abutting head 51 to approach the right end of the arc-shaped long circular hole 13, screwing the fastening nut 53, and measuring and recording the angle between the right angle detection surface 44 and the bottom plate measurement surface 231 by using a universal angle ruler; because the left angle detection surface 43 and the right angle detection surface 44 of the angle detection rod 4 are parallel and the center point of the upper end of the angle detection rod 4 and the circle center of the detection mounting hole 11 are positioned on the same axis, the angle symmetry of the arc-shaped long circular hole 13 and the U-shaped opening 12 to the detection mounting hole 11 can be obtained by comparing the measured values twice, if the two angle measured values are equal, the requirement of the symmetry is considered to be met, and if the two angle measured values are not equal, the requirement of the symmetry is considered not to be met.

The device is a high-precision symmetry detection device with high universality, can realize gapless positioning on a workpiece specially aiming at the workpiece with the special shape of the quick acting plate 1, sequentially realize centering, rotation prevention and measurement on the workpiece when the workpiece is clamped, and respectively adopt different positioning structures to support in the detection mounting hole 11, the U-shaped opening 12 and the arc-shaped long circular hole 13 of the quick acting plate 1 in a gapless manner without being influenced by the size of the aperture of the workpiece, so that the device can be matched with the workpiece with the quick acting plate 1 with a wide range of sizes, has strong universality, can realize gapless support on each mounting hole, has stable structure and strong reliability, is convenient to operate, and greatly improves the working efficiency; because the workpiece is accurately positioned, the detection result is accurate and reliable, and the measurement precision is improved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a high accuracy symmetry detection device which characterized in that: comprises a supporting seat (2), a conical centering component, an angle detection rod (4), a butt inserted shaft (5) and a movable sleeve (9);

the supporting seat (2) comprises a vertical centering shaft fixing plate (21), the lower end of the centering shaft fixing plate (21) extends to form a horizontal bottom plate (23), the upper surface of the bottom plate (23) is a bottom plate measuring surface (231), and the bottom plate measuring surface (231) is perpendicular to the centering shaft fixing plate (21);

the conical centering assembly comprises a conical centering shaft (31), a movable top block (33) and a centering guide block (34) which are assembled together, the conical centering shaft (31) vertically penetrates through and is rotatably installed in a centering shaft fixing plate (21), the outer contour of the centering guide block (34) is circular, the diameter of the centering guide block is smaller than the aperture of a detection installation hole (11) of a quick acting plate (1) to be detected, a centering shaft installation hole (341) is formed in the center of the centering guide block (34), the tail end of the conical centering shaft (31) penetrates through the centering shaft installation hole (341) so that the centering guide block (34) is installed on the conical centering shaft (31), and meanwhile, a plurality of movable top blocks (33) capable of sliding along the radial direction of the centering guide block (34) are installed in the centering guide block (34);

one side of the centering shaft fixing plate (21) is also provided with two movable sleeves (9) which can slide in opposite directions along the horizontal direction, and the movable sleeves (9) are positioned above the conical centering component;

the angle detection rod (4) is parallel to the centering shaft fixing plate (21) and is arranged above the bottom plate (23), the upper end of the angle detection rod (4) is rotatably arranged at the tail end of the conical centering shaft (31), the left side surface and the right side surface of the angle detection rod (4) are respectively a left angle detection surface (43) and a right angle detection surface (44) which are perpendicular to the plate surface of the centering shaft fixing plate (21), and the left angle detection surface (43) and the right angle detection surface (44) are parallel; the lower end of the angle detection rod (4) is detachably provided with a butt inserting shaft (5), the front end of the butt inserting shaft (5) is provided with a butt joint head (51), and the butt joint head (51) is arranged on the inner side of the angle detection rod (4).

2. The high accuracy symmetry detection apparatus according to claim 1, characterized in that: the waist of the conical centering shaft (31) is a rotary mounting section (312), the rotary mounting section (312) is rotatably mounted in the centering shaft fixing plate (21) through a bearing (35), the outer ring of the bearing (35) is in interference fit with a bearing mounting hole in the centering shaft fixing plate (21), and the inner ring of the bearing (35) is in clearance fit with the rotary mounting section (312).

3. The high accuracy symmetry detection apparatus according to claim 2, characterized in that: a plurality of sliding through grooves (342) distributed along the radial direction are formed in the end face of one side of the centering guide block (34), and the sliding through grooves (342) are communicated with the centering shaft mounting hole (341); the upper end of the movable top block (33) is provided with a contact (333), and the lower end surface of the movable top block (33) is provided with a matching sliding inclined surface (332);

the conical centering shaft (31) is of an integrally formed multi-section stepped shaft-shaped structure, a conical centering section (313) and a guide block mounting section (314) are sequentially arranged beside a rotary mounting section (312), the conical centering section (313) is provided with a guide sliding conical surface (3131) corresponding to the movable jacking block (33), and the inclination angles of the guide sliding conical surface (3131) and the matching sliding inclined surface (332) are consistent; the diameter of the guide block mounting section (314) is matched with the aperture of the centering shaft mounting hole (341); the guide block mounting section (314) of the conical centering shaft (31) is sleeved in the centering shaft mounting hole (341), the movable top block (33) is positioned in the sliding through groove (342), and meanwhile, the guide sliding conical surface (3131) is attached to the matching sliding inclined surface (332).

4. The high accuracy symmetry detection apparatus according to claim 3, characterized in that: the conical centering assembly further comprises a cover plate (32), the cover plate (32) is an annular plate, the conical centering shaft (31) penetrates through a center hole (321) of the cover plate (32), and meanwhile, the cover plate (32) is installed on one side, provided with a sliding through groove (342), of the centering guide block (34) in a sealing mode through a connecting screw (36), so that the movable top block (33) is installed in the sliding through groove (342) in a sealing mode; a movable hole (331) is arranged in the movable top block (33); the connecting screw (36) penetrates through the cover plate (32), the movable hole (331) and the centering guide block (34) in sequence, wherein the movable hole (331) is a long round hole.

5. The high accuracy symmetry detection apparatus according to claim 4, wherein: the end face of the contact (333) is a hemispherical surface, and the conical centering shaft (31) is detachably and fixedly connected in the centering shaft fixing plate (21) through a locking nut (37).

6. The high accuracy symmetry detection apparatus according to claim 1, characterized in that: two guide pins (8) are detachably installed on one side of the centering shaft fixing plate (21) in a penetrating mode, the axis connecting line of the two guide pins (8) is parallel to the bottom plate measuring surface (231), and each guide pin (8) comprises a threaded end (81), a movable sleeve installing section (82) and a pin cap (83) fixedly connected to one end of the movable sleeve installing section (82) which are sequentially connected; the movable sleeve (9) is sleeved on the movable sleeve mounting section (82), and meanwhile, the tail end of the guide pin (8) penetrates through the fixed plate (21) of the centering shaft and the threaded end (81) is screwed with a nut;

the movable sleeve mounting section (82) is provided with two binding surfaces (821) which extend in the axial direction and are parallel to each other, the movable sleeve (9) is provided with a guide pin mounting hole (91) with an oblong cross section, the movable sleeve (9) is sleeved on the movable sleeve mounting section (82), and meanwhile, the binding surfaces (821) are bound with the upper plane inner wall and the lower plane inner wall of the guide pin mounting hole (91);

the conical sliding block (6) capable of sliding up and down along the vertical direction is further mounted on one side of the centering shaft fixing plate (21), the conical sliding block (6) is provided with two bilaterally symmetrical extrusion inclined planes (61), and the two extrusion inclined planes (61) are respectively abutted to the outer surface of the movable sleeve (9).

7. The high accuracy symmetry detection apparatus according to claim 6, characterized in that: the rear end of the conical sliding block (6) is also provided with a guide end (64), a long-strip-shaped guide limiting hole (211) extending along the vertical direction is formed in the centering shaft fixing plate (21), and the guide end (64) penetrates through the guide limiting hole (211).

8. The high accuracy symmetry detection apparatus according to claim 7, wherein: the upper end of the centering shaft fixing plate (21) extends towards one side to form a horizontal pull rod fixing plate (22), and a pull rod mounting hole (221) is formed in the pull rod fixing plate (22); the pull rod fixing device is characterized by further comprising a knurled screw (7), a knurled head is arranged at the upper end of the knurled screw (7), an arc-shaped limiting groove (71) extending along the circumferential direction is formed in the lower end of the knurled screw (7), the knurled screw (7) penetrates through and is screwed into the pull rod mounting hole (221), and meanwhile the lower end of the knurled screw (7) can be rotatably inserted into the conical sliding block (6);

a pull rod hole (62) which is vertically communicated is formed in the conical sliding block (6), and a limit screw mounting hole (63) is further formed in the conical sliding block (6); the limiting screw mounting hole (63) is vertical to the pull rod hole (62) and does not penetrate completely;

the lower end of the knurled screw (7) is inserted into the pull rod hole (62), a limit screw is inserted into the limit screw mounting hole (63), and the limit screw is partially clamped in an arc-shaped limit groove (71) of the knurled screw (7).

9. The high accuracy symmetry detection apparatus according to claim 1, characterized in that: the tail end of the conical centering shaft (31) is provided with a detection rod mounting hole (3132), the upper end of the angle detection rod (4) is provided with a centering connecting column (41) perpendicular to the angle detection rod (4), the centering connecting column (41) is inserted into the detection rod mounting hole (3132) and is in clearance fit with the detection rod mounting hole (3132), and an exhaust hole (411) which is through along the axial direction is formed in the centering connecting column (41).

10. The high accuracy symmetry detection apparatus according to claim 1, characterized in that: the lower end of the angle detection rod (4) is provided with an abutting insertion shaft mounting hole (42), the abutting insertion shaft mounting hole (42) is a long round hole, the abutting insertion shaft (5) comprises a section of threaded connection section (52), an abutting head (51) is arranged at one end of the threaded connection section (52), the threaded connection section (52) penetrates through the abutting insertion shaft mounting hole (42), and a fastening nut (53) is screwed on the threaded connection section (52); in addition, the abutting head (51) is a conical block structure.

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