CN210464423U - Auxiliary Positioning and Clamping Device for Piston Pin Hole Inspection Before Upper Roundness Tester - Google Patents
Auxiliary Positioning and Clamping Device for Piston Pin Hole Inspection Before Upper Roundness Tester Download PDFInfo
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- CN210464423U CN210464423U CN201921663074.8U CN201921663074U CN210464423U CN 210464423 U CN210464423 U CN 210464423U CN 201921663074 U CN201921663074 U CN 201921663074U CN 210464423 U CN210464423 U CN 210464423U
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Abstract
The utility model discloses an auxiliary positioning clamping device in front of a roundness measuring instrument for piston pin hole detection, which comprises a reference bottom plate, a universal fixture, a reference guide seat and a pin hole shaft, wherein a vertical guide rail arranged along the vertical direction is fixed on the side surface of the reference guide seat, a vertical slider is connected on the vertical guide rail in a sliding way, a horizontal reference transverse arm and a stop block are connected on the vertical slider, the pin hole shaft arranged along the vertical direction is fixed at the free end of the horizontal reference transverse arm, and a positioning piece for positioning the vertical slider is connected on the stop block; the universal fixture comprises a measuring flat plate, a fine-tuning screw micrometer and a compression knob screw rod, wherein a positioning shaft is fixed at the bottom of the measuring flat plate, and the positioning shaft is sleeved in a positioning hole of the reference bottom plate. The utility model discloses can stably the centre gripping piston of volume of awaiting measuring, effectively avoid the piston to produce the trace and rock on the carousel of roundness measuring equipment, can also guarantee in addition that roundness measuring equipment can measure the whole section of piston pin hole to effectively improve piston pin hole measuring accuracy.
Description
Technical Field
The utility model relates to a piston pin hole detection area especially relates to piston pin hole detects auxiliary positioning clamping device before going up the roundness measuring apparatus.
Background
In the prior art, the roundness and cylindricity of a piston pin hole are measured by adopting the method shown in figure 1, a pin hole of a piston to be measured is used for assembling and testing, a matched jig with a certain specification is found and is placed in a positioning central hole on a measuring turntable of a roundness measuring instrument, a bearing block is used for stabilizing if necessary, and then starting measurement is carried out. Obviously, a part of the pin shaft of the jig is sleeved in the pin hole of the piston, and the requirement for measuring the roundness and cylindricity shape error of the whole section of the pin hole cannot be met. If the extension estimation method is properly adopted to estimate whether the result meets the requirement, certain detection risk is bound to exist. The actual microscopic shape of the pin hole cannot be obtained because the inspector does not know whether the piston slightly shakes due to the rotation of the turntable during the measurement process.
Disclosure of Invention
An object of the utility model is to provide a piston pin hole that can improve the detection accuracy detects the assistance-localization real-time clamping device before going up the roundness measuring apparatus.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
piston pin hole detects auxiliary positioning clamping device before going up the roundness measuring apparatu, its characterized in that: which comprises a reference bottom plate, a universal fixture, a reference guide seat and a pin hole shaft,
the horizontal datum cross arm is connected with a stop block, a pin hole shaft arranged in the vertical direction is fixed at the free end of the horizontal datum cross arm, and a positioning piece for positioning the vertical slide block is connected with the stop block;
the universal fixture comprises a measuring flat plate, a fine tuning screw micrometer and a compression knob screw rod, wherein a positioning shaft is fixed at the bottom of the measuring flat plate and sleeved in a positioning hole of a reference bottom plate; one end of the measuring flat plate is connected with a fine adjustment connecting block, the fine adjustment screw micrometer is fixed on the fine adjustment connecting block along the horizontal direction, a horizontal guide rail is fixed on the measuring flat plate, a horizontal sliding block is connected to the horizontal guide rail in a sliding mode, a fixed leaning block is fixed on the horizontal sliding block, and the fine adjustment screw micrometer drives the horizontal sliding block to slide on the horizontal guide rail; the other end of the measuring flat plate is fixedly provided with a compression connecting block, the compression knob screw rod is fixed on the compression connecting block along the horizontal direction in an opposite direction to the fine adjustment screw micrometer, and the head of the compression knob screw rod is fixedly provided with a pressure head.
The bottom of fine setting connecting block is fixed with the transition connecting block, is equipped with rectangular shape mounting hole on the transition connecting block, and the bolt passes rectangular shape mounting hole and fixes a position transition connecting block locking.
The free end of the horizontal reference cross arm is provided with a positioning reference hole, the top of the pin hole shaft is provided with a positioning part, and the positioning part is sleeved in the positioning reference hole and locked through a bolt.
The positioning piece is a telescopic shaft which is connected to the upper part of the stop block in a sliding mode.
The positioning hole and the pin hole shaft are coaxially arranged.
The fine tuning screw micrometer and the compression knob screw rod are coaxially arranged.
The pressure head is made of nylon materials.
The utility model adopts the above technique, can stably the centre gripping volume of awaiting measuring piston, effectively avoid the piston to produce the trace and rock on the carousel of roundness measuring equipment, can also guarantee in addition that roundness measuring equipment can measure the whole section of piston pin hole to effectively improve piston pin hole measuring accuracy.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments;
FIG. 1 is a schematic diagram of a prior art inspection of a piston pin bore.
Fig. 2 is a schematic view of the auxiliary positioning and clamping device before the roundness measuring instrument is used for detecting the piston pin hole of the present invention;
FIG. 3 is a schematic view of a universal fixture.
Detailed Description
As shown in figure 2 or 3, the auxiliary positioning and clamping device used in front of the roundness measuring instrument for detecting the piston pin hole of the utility model comprises a reference bottom plate 1, a universal fixture 4, a reference guide seat 2 and a pin hole shaft 3,
the base guide seat 2 is vertically fixed on the base bottom plate 1, a vertical guide rail 5 arranged along the vertical direction is fixed on the side surface of the base guide seat 2, a vertical sliding block 6 is connected on the vertical guide rail 5 in a sliding manner, a horizontal base cross arm 61 and a stop block 62 are connected on the vertical sliding block 6, a pin hole shaft 3 arranged along the vertical direction is fixed at the free end of the horizontal base cross arm 61, and a positioning piece 7 for positioning the vertical sliding block 6 is connected on the stop block 62;
the universal fixture 4 comprises a measuring flat plate 41, a fine tuning screw micrometer 42 and a compression knob screw 43, a positioning shaft 44 is fixed at the bottom of the measuring flat plate 41 (the positioning shaft 44 is fixed on the measuring flat plate 41 by a retaining screw, so that the positioning shaft 44 can be quickly replaced), and the positioning shaft 44 is sleeved in a positioning hole of the reference bottom plate 1;
one end of the measuring flat plate 41 is connected with a fine-tuning connecting block 45, the fine-tuning micrometer screw 42 is fixed on the fine-tuning connecting block 45 along the horizontal direction, a horizontal guide rail 49 is fixed on the measuring flat plate 41, a horizontal sliding block 410 is connected on the horizontal guide rail 49 in a sliding manner, a fixed leaning block 46 is fixed on the horizontal sliding block 410, and the fine-tuning micrometer screw 42 drives the horizontal sliding block 410 to slide on the horizontal guide rail 49 (the fine-tuning micrometer screw 42 can control the pretightening force on the piston in the clamping use process); and a compression connecting block 47 is fixed at the other end of the measuring flat plate 41, the compression knob screw 43 is fixed on the compression connecting block 47 along the horizontal direction and opposite to the fine adjustment screw micrometer 42, and a pressure head 48 is fixed at the head of the compression knob screw 43.
The bottom of fine setting connecting block 45 is fixed with transition connecting block 411, is equipped with rectangular shape mounting hole on the transition connecting block 411, and the bolt passes rectangular shape mounting hole and fixes a position transition connecting block 411 lock, and through the position of adjustment fine setting connecting block 45, the position of adjustment fine setting micrometer screw 42 can the quick adjustment switch between the piston of equidimension not of aim at.
The free end of the horizontal reference cross arm 61 is provided with a positioning reference hole, and the top of the pin hole shaft 3 is provided with a positioning part which is sleeved in the positioning reference hole and locked by a bolt. The structure can realize the quick replacement of the pin hole shaft 3 so as to be suitable for the piston detection of different signals.
The positioning member 7 is a telescopic shaft slidably connected to the upper portion of the stopper 62. When the vertical sliding block 6 slides to the uppermost end, the telescopic shaft is pushed out to abut against the top of the stop block 62, so that the vertical sliding block 6 can be preliminarily fixed, and the pin hole shaft 3 is prevented from sliding off carelessly.
The positioning hole and the pin hole shaft 3 are coaxially arranged, in order to realize coaxial arrangement, a shaft sleeve can be manufactured during initial assembly of the measuring tool, a hole matched with the pin hole shaft 3 is designed at one end of the shaft sleeve, and a shaft matched with the positioning hole is designed at the other coaxial end of the shaft sleeve, so that the centering coaxiality of the pin hole shaft 3 and the positioning hole is realized.
The vernier micrometer screw 42 and the compression turn screw 43 are coaxially arranged, so that the stability of piston clamping is improved.
The pressure head 48 is made of nylon material, so that the pressure head 48 is prevented from damaging the piston and has the function of tightly attaching and pressing.
The utility model discloses a working process:
1. firstly, whether the pin hole shaft 3 is used for measuring the matching of the piston of the machine type is confirmed, and the lower pin hole shaft 3 can be tried to be assembled by holding the piston sleeve according to the mark, so that the pin hole shaft 3 can be ensured to smoothly slide into the pin hole of the piston. If not matched, the bolt is unscrewed for replacement, and finally the pin hole shaft 3 is locked.
2. The two horizontal ends of the universal fixture 4 (complete set) are placed on the reference base plate 1, so that the positioning shaft 44 at the lower end of the universal fixture 4 is placed in the positioning hole on the reference base plate 1.
3. The piston to be clamped and measured is placed on the universal fixture 4, the two skirt feet of the piston lean against the fixed leaning block 46, the ring bank bus horizontally leans against the measuring flat plate 41, the distance of the horizontal sliding block 410 is roughly adjusted and moved, the center of the piston pin hole is visually observed to be approximately coaxial with the center of the positioning shaft 44 on the measuring flat plate 41, a certain fine adjustment distance and a certain clamping distance are reserved, and a space for guiding and swinging when the pin hole shaft 3 is placed into the piston pin hole in the next step is provided. If the same type of piston is measured continuously, only the micrometer head and the knob screw need to be finely adjusted to complete the measurement.
4. The left hand protects the piston, and the right hand withdraws the telescopic shaft, so that the pin hole shaft 3 slowly slides downwards along the direction of the vertical guide rail 5 under the control of the hand, is automatically guided and is slowly put into the piston pin hole until the piston ring bank vertically leans against the measuring flat plate 41 under the action of gravity, and the pin hole shaft 3 is ensured to be vertical to the measuring plane. At this time, both hands are released, and the piston is naturally placed on the measuring plate 41.
5. The micrometer screw 42 is rotated by the left hand to extend the micrometer rod slowly and drive the fixed backup block 46 to move out along the horizontal guide rail 49 in parallel to the right. When the fixing block 46 abuts one skirt of the piston, the piston rotates around the vertically inserted pin hole axis 3 until both skirts abut the fixing block 46, and the trim nut rattles and releases the left hand. At this time, the right hand moves the telescopic shaft, tries to pull up the pin hole shaft 3, slightly rotates the fine adjustment screw micrometer 42, releases the left hand when rattling again, and allows the pin hole shaft 3 protected by the right hand to be put down to the end in a natural state, so that the pin hole shaft 3 can be finally pulled out of the pin hole after the piston is fixed. Finally, the pressing knob screw 43 is screwed by the right hand again, and the pressing knob screw 43 drives the pressing block to rotate and move leftwards. When the pressing block is pressed against the high compression surface of the piston and does not rotate along with the piston, a little force is applied, but the force cannot be applied too much, so that the piston is prevented from being clamped to be deformed.
6. The piston to be tested is ensured to be fixed on the universal fixture 4, the telescopic shaft is lifted up slowly by the right hand, and the pin hole shaft 3 after the positioning mission is finished is slowly pulled out of the piston pin hole along the vertical guide rail vertically and upwards. Finally, when the lifting and sliding are carried out to the uppermost end, the telescopic shaft is pushed out, the vertical sliding block 6 is fixed, and the free sliding is prevented.
7. And moving the whole universal fixture 4 for clamping the piston to be measured out of the positioning hole of the reference bottom plate 1 and transferring the whole universal fixture into the positioning central hole on the roundness measuring instrument. The moving process needs to be carried out lightly, the moving distance is not suitable for being too far, and a workbench for placing the universal measuring tool is preferably arranged beside the roundness measuring instrument. And then, the roundness and cylindricity of the piston pin hole can be measured by a roundness measuring instrument immediately.
8. After the measurement is finished, the general clamp 4 is lifted out of the positioning center hole on the roundness measuring instrument and transferred into the positioning center hole on the flat plate of the general measuring tool. And simultaneously, the piston is withdrawn and taken back according to the steps, and then the measurement of the next piston is carried out.
It is particularly noted that for a piston with a relatively small shape, a method of superposing a flat cushion block with a proper height on the measuring flat plate 41 of the universal fixture 4 can be adopted, so that the center height of the piston is adjusted to the position height of the compression screw 43 as much as possible.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921663074.8U CN210464423U (en) | 2019-09-30 | 2019-09-30 | Auxiliary Positioning and Clamping Device for Piston Pin Hole Inspection Before Upper Roundness Tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921663074.8U CN210464423U (en) | 2019-09-30 | 2019-09-30 | Auxiliary Positioning and Clamping Device for Piston Pin Hole Inspection Before Upper Roundness Tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210464423U true CN210464423U (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921663074.8U Active CN210464423U (en) | 2019-09-30 | 2019-09-30 | Auxiliary Positioning and Clamping Device for Piston Pin Hole Inspection Before Upper Roundness Tester |
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| CN (1) | CN210464423U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113199426A (en) * | 2021-06-04 | 2021-08-03 | 无锡威孚马山油泵油嘴有限公司 | Piston assembly fixture |
| CN113386068A (en) * | 2021-07-30 | 2021-09-14 | 苏州中科行智智能科技有限公司 | Positioning and clamping mechanism for visual detection of piston hole |
-
2019
- 2019-09-30 CN CN201921663074.8U patent/CN210464423U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113199426A (en) * | 2021-06-04 | 2021-08-03 | 无锡威孚马山油泵油嘴有限公司 | Piston assembly fixture |
| CN113199426B (en) * | 2021-06-04 | 2025-08-29 | 无锡威孚马山油泵油嘴有限公司 | Piston assembly fixture |
| CN113386068A (en) * | 2021-07-30 | 2021-09-14 | 苏州中科行智智能科技有限公司 | Positioning and clamping mechanism for visual detection of piston hole |
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Effective date of registration: 20220126 Address after: 350000 No. 3 comprehensive office building, No. 8, business Avenue, Nantong town, Minhou County, Fuzhou City, Fujian Province Patentee after: Fujian Huawei Juquan Precision Technology Co.,Ltd. Address before: 350000 Fujian Province, Jinan District of Fuzhou City Drum Shan Fuxing Investment Zone Patentee before: Fuzhou Juquan Automobile Fitting Co.,Ltd. |