CN211121025U - Crankshaft semicircular key groove symmetry degree checking fixture - Google Patents
Crankshaft semicircular key groove symmetry degree checking fixture Download PDFInfo
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- CN211121025U CN211121025U CN201922404392.9U CN201922404392U CN211121025U CN 211121025 U CN211121025 U CN 211121025U CN 201922404392 U CN201922404392 U CN 201922404392U CN 211121025 U CN211121025 U CN 211121025U
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- fixed
- key groove
- screw rod
- crankshaft
- screw
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- 125000003003 spiro group Chemical group 0.000 claims abstract description 4
- 239000002023 wood Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000000691 measurement method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model provides an utensil is examined to bent axle semicircle keyway symmetry, including handle, locating rack, percentage table, screw rod and locating pin, locating rack one end is fixed with the handle, and the other end is fixed with the percentage table, the locating pin is fixed on the locating rack, has seted up first screw hole on the locating rack simultaneously, screw rod and screw hole spiro union make bent axle semicircle keyway symmetry detect convenient operation, efficient.
Description
Technical Field
The utility model relates to a bent axle semicircle keyway detection area especially relates to a bent axle semicircle keyway symmetry examines utensil.
Background
The crankshaft is an important accessory of the engine and bears power output of the engine, the semicircular key groove on the shaft neck of the crankshaft is the key for transmitting power of the engine, the requirement on machining precision is high, the central line of the semicircular key groove is required to be consistent with the central line of the shaft neck where the semicircular key groove is located, namely the left end and the right end of the semicircular key groove of the crankshaft are required to be symmetrical, as shown in fig. 2, the shaft neck mark of the crankshaft is 10, the mark of the semicircular key groove is 11, for detection of the self-symmetry degree of the crankshaft key groove, V-shaped iron and a key groove plug plate are adopted to simulate a key groove central plane on a detection platform, then a height vernier scale and a lever dial indicator are used for detection, and the symmetry degree is determined by detecting. The detection process is complex, the operation is troublesome and the efficiency is low.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an utensil is examined to convenient operation and efficient bent axle semicircle keyway symmetry.
The technical scheme of the utility model is realized like this: the utility model provides an utensil is examined to bent axle semicircle keyway symmetry, it includes handle, locating rack and percentage table, still includes screw rod and locating pin, locating rack one end is fixed with the handle, and the other end is fixed with the percentage table, the locating pin is fixed on the locating rack, has seted up first screw hole on the locating rack simultaneously, screw rod and screw hole spiro union.
On the basis of the technical scheme, preferably, the dial indicator fixing device further comprises a screw, wherein a through hole and a second threaded hole are formed in the positioning frame, the second threaded hole is located outside the through hole, the dial indicator is inserted into the through hole, and the screw can rotatably enter the second threaded hole and is abutted against the dial indicator, so that the dial indicator is fixed.
On the basis of the technical scheme, the positioning device is preferred to further comprise a fixing block, a groove is formed in the positioning pin, the fixing block is fixed on the positioning frame, and one end of the fixing block is abutted to the inner wall of the groove in the positioning pin so that the positioning pin is fixed.
On the basis of the technical scheme, preferably, the handle is made of wood.
On the basis of the technical scheme, the screw rod fixing device preferably further comprises a nut, and the nut is screwed on the screw rod to fix the screw rod.
The utility model discloses an utensil is examined to bent axle semicircle keyway symmetry has following beneficial effect for prior art:
(1) the crank shaft semicircular key groove symmetry degree detection device is convenient to operate and high in efficiency by arranging a handle, a positioning frame, a dial indicator, a screw rod and a positioning pin, wherein the handle is fixed at one end of the positioning frame, the dial indicator is fixed at the other end of the positioning frame, the positioning pin is fixed on the positioning frame, a first threaded hole is formed in the positioning frame, and the screw rod is in threaded connection with the threaded hole;
(2) through setting up the nut, the nut spiro union is fixed the screw on the screw rod, prevents that the screw rod from removing for first screw hole.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a structural diagram of the crankshaft semicircular key groove symmetry degree checking fixture of the present invention;
fig. 2 is a front view of the semicircular key groove of the crankshaft of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
As shown in fig. 1, combine fig. 2, the utility model discloses an utensil is examined to bent axle semicircle keyway symmetry, it includes handle 1, locating rack 2, percentage table 3, screw rod 4, locating pin 5, screw 6, fixed block 7 and nut 8.
The handle 1 is made of wood, and is convenient for a user to hold and use.
The handle 1 is fixed to one end of the locating rack 2, the dial indicator 3 is fixed to the other end of the locating rack, the locating pin 5 is fixed to the locating rack 2, meanwhile, a first threaded hole 21 is formed in the locating rack 2, and the screw rod 4 is in threaded connection with the threaded hole 21. One of them embodiment does, during the use put into the semicircle keyway 11 of bent axle with locating pin 5, make the bottom and the 11 bottoms of semicircle keyway of locating pin 5 contradict, and the lateral part and the 11 right sides of semicircle keyway of locating pin 5 contradict simultaneously, adjusting screw 4 again makes it contact with 10 excircles of semicircle keyway 11 place axle journal, and the gauge outfit of percentage table 3 can be extrudeed this moment and make percentage table 3 produce numerical value, records numerical value A1 that percentage table 3 shows. Then fall to turn 180 with bent axle semicircle keyway symmetry examine utensil, put into the semicircle keyway 11 of bent axle with locating pin 5, make the bottom of locating pin 5 contradict with semicircle keyway 11 bottom, the lateral part of locating pin 5 contradicts with semicircle keyway 11 left side simultaneously, records the numerical value A2 that percentage table 3 shows this moment. The absolute value of A1 minus A2 is calculated, and the difference is twice the deviation between the center line of the semicircular key groove 11 and the center line of the shaft neck 10, so that the distance between the center line of the semicircular key groove 11 and the center line of the shaft neck 10 can be calculated. Meanwhile, the degree of symmetry of the crankshaft semicircular key groove 11 and whether the degree of symmetry meets the qualified numerical value given by a customer can be judged through the difference, if the measuring method of the qualified numerical value given by the customer does not belong to the measuring method, the qualified numerical value given by the customer can be converted into the qualified numerical value corresponding to the measuring method through calculation, and whether the crankshaft semicircular key groove 11 is qualified or not can be judged.
Another embodiment is that, when in use, the positioning pin 5 is placed in the semicircular key groove 11 of the crankshaft, so that the bottom end of the positioning pin 5 is abutted against the bottom of the semicircular key groove 11, meanwhile, the side part of the positioning pin 5 is abutted against the right side of the semicircular key groove 11, and then the screw rod 4 is adjusted to be in contact with the excircle of the journal 10 where the semicircular key groove 11 is located. Then fall to turn 180 with bent axle semicircle keyway symmetry examine utensil, put into the semicircle keyway 11 of bent axle with locating pin 5, make the bottom and the conflict of semicircle keyway 11 bottom of locating pin 5, the lateral part and the conflict of semicircle keyway 11 left side of locating pin 5 simultaneously, observe the distance between the excircle of screw rod 4 and semicircle keyway 11 place axle journal 10 this moment, if there is not distance or the distance is very close, then prove that the central line of semicircle keyway 11 and the central line of self place axle journal 10 coincide basically, need not to calculate the symmetry through percentage table 3 again.
Still another embodiment does, at the in-process of processing semicircle keyway 11, because adopt the processing method of cutting, its lateral wall can be very regular, but semicircle keyway 11 bottom is irregular, lead to the bottom of locating pin 5 and conflict with semicircle keyway 11 bottom and carry out the measured data and have certain error, consequently measure through this mode, put into the semicircle keyway 11 of bent axle with locating pin 5 during the use, make the lateral part of locating pin 5 and conflict on semicircle keyway 11 right side, as shown in fig. 1, readjustment screw 4 makes its excircle with semicircle keyway 11 place axle journal 10 contact, the gauge outfit of percentage table 3 can be extrudeed this moment and make percentage table 3 produce numerical value, record numerical value A1 that percentage table 3 shows. Then the crankshaft semicircular key groove symmetry degree gauge is turned for 180 degrees, the positioning pin 5 is placed into the semicircular key groove 11 of the crankshaft, the side part of the positioning pin 5 is abutted against the left side of the semicircular key groove 11, meanwhile, the screw rod 4 is contacted with the excircle of the shaft neck 10 where the semicircular key groove 11 is positioned, the meter head of the dial indicator 3 is extruded at the moment to enable the dial indicator 3 to generate a numerical value, the numerical value A2 displayed by the dial indicator 3 is recorded, the absolute value of subtracting A2 from A1 is calculated, if the absolute value is larger, the lower the symmetry degree of the crankshaft semicircular key groove 11 is proved to be, the symmetry degree of the crankshaft semicircular key groove 11 and whether the symmetry degree meets the qualified numerical value given by a customer can be judged through the difference value, if the measurement method of the qualified numerical value given by the customer does not belong to the measurement method, the qualified numerical value given by the customer can be converted into the qualified numerical value corresponding to the measurement method through calculation, and whether the semicircular key groove 11 on the crankshaft is qualified or not can be judged. According to the measuring method, the positioning pin 5 is not in contact with the bottom and is only in contact with the side wall, so that the measuring error is small.
The positioning frame 2 is provided with a through hole 22 and a second threaded hole 23, the second threaded hole 23 is located outside the through hole 22, the dial indicator 3 is inserted into the through hole 22, and the screw 6 can rotate to enter the second threaded hole 23 and abut against the dial indicator 3, so that the dial indicator 3 is fixed. So, percentage table 3 can remove the distance that needs and then fix relative locating rack 2, can make the symmetry of bent axle semicircle keyway symmetry examine utensil and detect the symmetry of semicircle keyway 11 on the bent axle of different models, prevents that the diameter of bent axle journal 10 is too little to lead to the gauge outfit of percentage table 3 to touch journal 10.
The positioning pin 5 is provided with a groove, the fixing block 7 is fixed on the positioning frame 2, and one end of the fixing block is abutted to the inner wall of the groove in the positioning pin 5, so that the positioning pin 5 is fixed. In this manner, the positioning pin 5 can be fixed.
The nut 8 is screwed on the screw rod 4 to fix the screw rod 4.
The working principle of the crankshaft semicircular key groove symmetry degree checking fixture is as follows: during the use, put into the semicircle keyway 11 of bent axle with locating pin 5, make the lateral part of locating pin 5 contradict with semicircle keyway 11 right side, loosen nut 8 again, adjusting screw 4 makes it contact with the excircle of semicircle keyway 11 place axle journal 10, screws up nut 8 simultaneously and makes screw 4 fixed, as shown in figure 1, the gauge outfit of percentage table 3 can be extrudeed this moment and make percentage table 3 produce numerical value, records numerical value A1 that percentage table 3 shows. And then, turning the crankshaft semicircular key groove symmetry degree checking tool by 180 degrees, placing the positioning pin 5 into the semicircular key groove 11 of the crankshaft, enabling the side part of the positioning pin 5 to be abutted against the left side of the semicircular key groove 11, enabling the screw rod 4 to be in contact with the outer circle of the shaft neck 10 where the semicircular key groove 11 is located, enabling the head of the dial indicator 3 to be extruded to enable the dial indicator 3 to generate a numerical value, recording the numerical value A2 displayed by the dial indicator 3, calculating the absolute value of subtracting A2 from A1, and judging whether the symmetry degree of the semicircular key groove 11 on the crankshaft and the qualified numerical value given by a client are met through the difference.
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 (5)
1. The utility model provides an utensil is examined to bent axle semicircle keyway symmetry, its includes handle (1), locating rack (2) and percentage table (3), its characterized in that: still include screw rod (4) and locating pin (5), locating rack (2) one end is fixed with handle (1), and the other end is fixed with percentage table (3), locating pin (5) are fixed on locating rack (2), have seted up first screw hole (21) on locating rack (2) simultaneously, screw rod (4) and screw hole (21) spiro union.
2. The crankshaft semicircular keyway symmetry degree testing fixture of claim 1, characterized in that: still include screw (6), set up through-hole (22) and second screw hole (23) on locating rack (2), second screw hole (23) are located through-hole (22) outside, percentage table (3) are inserted and are located in through-hole (22), screw (6) rotatable get into in second screw hole (23) and in percentage table (3) inconsistent and then make percentage table (3) fixed.
3. The crankshaft semicircular keyway symmetry degree testing fixture of claim 1, characterized in that: the positioning device is characterized by further comprising a fixing block (7), wherein a groove is formed in the positioning pin (5), the fixing block (7) is fixed on the positioning frame (2), and one end of the fixing block is abutted to the inner wall of the groove in the positioning pin (5) so that the positioning pin (5) is fixed.
4. The crankshaft semicircular keyway symmetry degree testing fixture of claim 1, characterized in that: the handle (1) is made of wood.
5. The crankshaft semicircular keyway symmetry degree testing fixture of claim 1, characterized in that: the screw rod fixing device is characterized by further comprising a nut (8), wherein the nut (8) is screwed on the screw rod (4) to fix the screw rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922404392.9U CN211121025U (en) | 2019-12-27 | 2019-12-27 | Crankshaft semicircular key groove symmetry degree checking fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922404392.9U CN211121025U (en) | 2019-12-27 | 2019-12-27 | Crankshaft semicircular key groove symmetry degree checking fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211121025U true CN211121025U (en) | 2020-07-28 |
Family
ID=71690962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922404392.9U Active CN211121025U (en) | 2019-12-27 | 2019-12-27 | Crankshaft semicircular key groove symmetry degree checking fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211121025U (en) |
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2019
- 2019-12-27 CN CN201922404392.9U patent/CN211121025U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A tool for measuring the symmetry of crankshaft half circle keyway Granted publication date: 20200728 Pledgee: Agricultural Bank of China Danjiangkou Branch Pledgor: DANJIANGKOU DONGFA CRANKSHAFT Co.,Ltd. Registration number: Y2024980014834 |