CN212320605U - Crankshaft oil seal journal pin hole center distance detection tool - Google Patents
Crankshaft oil seal journal pin hole center distance detection tool Download PDFInfo
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- CN212320605U CN212320605U CN202020861174.8U CN202020861174U CN212320605U CN 212320605 U CN212320605 U CN 212320605U CN 202020861174 U CN202020861174 U CN 202020861174U CN 212320605 U CN212320605 U CN 212320605U
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- positioning block
- crankshaft
- pin
- oil seal
- main shaft
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Abstract
The utility model discloses a crankshaft oil seal journal pin hole center distance checking fixture, which comprises a checking fixture bracket, a special checking crankshaft, and a positioning device and a measuring device which are arranged on the checking fixture bracket; the gauge bracket is in an inverted U shape; the positioning device comprises a main shaft left positioning block, a main shaft right positioning block and an axial positioning pin; the spindle left positioning block and the spindle right positioning block are respectively arranged on the lowest parts of two ends of the checking fixture bracket, and isosceles trapezoid notches are formed in the lower parts of the spindle left positioning block and the spindle right positioning block; the axial positioning pin is connected to the side face of the main shaft right positioning block; the measuring device comprises a meter placing frame, a dial indicator and an auxiliary pin; one end of the gauge placing frame is connected to the side face of the checking fixture support, and the other end of the gauge placing frame is provided with a gauge placing through hole; the dial indicator is movably fixed in the dial indicator through hole; the auxiliary pin is matched with an oil seal journal pin hole on the special calibration crankshaft. The checking fixture can quickly detect the distance between the pin hole in the end face of the oil seal journal of the crankshaft and the central axis of the crankshaft, and judge whether the position of the pin hole meets the requirement.
Description
Technical Field
The utility model belongs to the technical field of the automobile parts detects, a crankshaft oil blanket axle journal pinhole center distance examines utensil is related to.
Background
Crankshafts are key components of automotive engines and require high assembly requirements. Most crankshaft oil seal journal end faces are provided with pin holes, the pin holes play a role in positioning during assembly, and whether the pin hole positions meet requirements or not is judged by detecting the distance from the pin holes to the central axis of the crankshaft in the industry. In machining, pin hole position detection is usually performed by three-dimensional coordinates, and the method requires that a crankshaft is manually transported to a detection chamber and then detected by a special person. The position precision detection of one crankshaft pin hole needs at least six minutes without calculating the carrying time, and the detection efficiency is low; because the detection method is offline detection, if the detection finds that the pin holes have problems, the pin holes need to be moved back to the production line for processing, and more manpower and material resources are consumed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a crankshaft oil blanket axle journal pinhole center distance examines utensil to prior art not enough. The checking fixture can quickly detect the distance between the pin hole in the end face of the oil seal journal of the crankshaft and the central axis of the crankshaft, and judge whether the position of the pin hole meets the manufacturing requirements.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a crankshaft oil seal journal pin hole center distance detection tool comprises a detection tool support, a special calibration crankshaft, a positioning device and a measuring device, wherein the positioning device and the measuring device are arranged on the detection tool support; the gauge bracket is in an inverted U shape; the positioning device comprises a main shaft left positioning block, a main shaft right positioning block and an axial positioning pin; the upper parts of the main shaft left positioning block and the main shaft right positioning block are respectively arranged at the bottoms of the left end and the right end of the checking fixture bracket, and the lower parts of the main shaft left positioning block and the main shaft right positioning block are respectively provided with an isosceles trapezoid notch; the axial positioning pin is connected to the side face, facing the outer side of the checking fixture support, of the spindle right positioning block; the measuring device comprises a meter placing frame, a dial indicator and an auxiliary pin; one end of the gauge placing frame is connected to the side face of the checking fixture support, and a gauge placing through hole is formed in the position, close to the end, of the other end of the gauge placing frame; the measuring head at the bottom of the dial indicator is movably fixed in the indicator placing through hole and penetrates through the indicator placing frame; the auxiliary pin is matched with an oil seal journal pin hole on the special calibration crankshaft.
In the utility model, the checking fixture bracket is in an inverted U shape, the middle part is arched upwards, and the positions of the two ends are lowest; the main shaft left positioning block and the main shaft right positioning block respectively correspond to a left main journal and a right main journal of the crankshaft; the axial positioning pin abuts against an axial positioning surface at the crankshaft journal during measurement to play a positioning role; the two side edges and the top edge of the isosceles trapezoid notch can prop against the crankshaft to play a role in limiting; the dial indicator placing frame is used for installing a dial indicator; the front end of the auxiliary pin can be just inserted into the crankshaft pin hole in a matching way, the diameter of the rear end of the auxiliary pin is the same as that of the crankshaft pin hole, and the fact that a measuring head of the dial indicator contacts the rear end of the auxiliary pin is equivalent to the fact that the measuring head of the dial indicator contacts the edge of the crankshaft pin hole; the axial positioning pin and the detecting head of the dial indicator are positioned on the same straight line in the horizontal position projection; the dial indicator can be freely adjusted up and down; the special proofreading crankshaft is a standard crankshaft piece, and the distance from the highest point of a journal pin hole to the central axis of the crankshaft is a known calibration value; the special calibration crankshaft is used for calibrating the dial indicator.
As a further technical improvement, after the extension lines of two waist lines of the isosceles trapezoid notches at the bottoms of the spindle left positioning block and the spindle right positioning block intersect, an angle α is formed, and the angle α is 90 °. Two side edges of the isosceles trapezoid notch can prop against the crankshaft surface to play a role in positioning.
As a further technical improvement, reinforcing grooves are formed in the tops of the spindle left positioning block and the spindle right positioning block; and two lowest ends of the checking fixture support are respectively sleeved in the reinforcing grooves of the main shaft left positioning block and the main shaft right positioning block. The gauge support is sleeved into the reinforcing groove and then fixed through electric welding.
As a further technical improvement, a positioning pin mounting hole is formed in the side surface, facing the outer side of the checking fixture support, of the spindle right positioning block; the axial positioning pin is connected with the right main shaft positioning block in an interference fit mode through a positioning pin mounting hole.
As a further technical improvement, the meter placing frame is also provided with an adjusting hole; the adjusting hole is communicated with the meter placing through hole; and the adjusting hole is connected with an adjusting screw through threads. The dial indicator can be moved up and down along the indicator placing through hole after the adjusting screw is loosened, and the dial indicator can be fixed after the adjusting screw is screwed down, so that the height of the dial indicator can be adjusted.
As a further technical improvement, the end part of the axial positioning pin is in a circular arc shape. By the design, the vertex of the end part of the axial positioning pin can be ensured to be contacted with the axial positioning surface of the crankshaft journal.
As a further technical improvement, the meter placing frame is in threaded connection with the gauge support.
The utility model provides a bent axle oil blanket axle journal pinhole center distance examines utensil's application method, including following step:
firstly, checking before detection: inserting an auxiliary pin into a pin hole of a journal of the special proofreading crankshaft oil seal, respectively placing a main shaft left positioning block and a main shaft right positioning block of a detection device on a left main journal and a right main journal of the special proofreading crankshaft, and enabling an axial positioning pin to be close to an axial positioning surface of the special proofreading crankshaft; then, rotating the checking fixture, finding out the highest point of the dial indicator when the detecting head of the dial indicator contacts the auxiliary pin according to the reading of the dial indicator, and calibrating to zero the dial indicator at the position;
and secondly, detecting the center distance of a pin hole of a crankshaft oil seal journal: inserting an auxiliary pin into a pin hole of a crankshaft oil seal journal of the tested crankshaft, respectively placing a main shaft left positioning block and a main shaft right positioning block of the calibrated checking fixture on a left main journal and a right main journal of the tested crankshaft, and enabling an axial positioning pin to be close to an axial positioning surface of the tested crankshaft; then, rotating the checking fixture, finding out the highest point of the auxiliary pin contacted by the detection head of the dial indicator according to the reading of the dial indicator, and reading out a detection value, wherein the detection value is the difference value between the distance from the pin hole of the oil seal journal of the crankshaft to be detected to the axis of the crankshaft and a calibration value, and the difference value is a positive number or a negative number;
thirdly, conversion of measured values: setting a calibration value for specially calibrating the distance from a journal pin hole of the crankshaft oil seal to the central axis of the crankshaft in the first step of the method as H1; in the second step, the detected value of the distance between the journal pin hole of the crankshaft oil seal to be measured and the central axis of the crankshaft is set as H2, and the distance between the journal pin hole of the crankshaft oil seal to be measured and the central axis of the crankshaft is set as H, so that H = H1+ H2.
Compared with the prior art, the utility model discloses the beneficial effect who possesses:
1. the device of the utility model is simple in structure, convenient operation has reduced the time of looking for the reference surface in traditional three-coordinate detection method, has reduced the loaded down with trivial details step when detecting, has promoted detection efficiency.
2. The utility model discloses the device can use on producing the line, in time detects the bent axle that produces, can reform immediately if finding unqualified product, has improved the production efficiency of product.
3. Use the utility model discloses the device detects the bent axle, need not to carry the bent axle, has reduced intensity of labour, alleviates manpower and materials, has improved work efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of the inspection device.
FIG. 2 is a schematic view of the detection tool in operation.
FIG. 3 is a schematic view of the left positioning block structure of the spindle.
FIG. 4 is a schematic view of the right positioning block structure of the spindle.
FIG. 5 is a schematic view of the combination of the fixture support and the spindle right positioning block.
Fig. 6 is a schematic structural view of the meter placement frame.
Reference numerals: 1-a gauge support, 2-a spindle left positioning block, 3-a spindle right positioning block, 4-an axial positioning pin, 5-a meter placing frame, 6-a dial indicator, 7-a reinforcing groove, 8-a positioning pin mounting hole, 9-an adjusting screw, 10-a meter placing through hole, 11-an adjusting hole, 12-an auxiliary pin, 13-a special calibration crankshaft and 14-an oil seal journal pin hole.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Example 1:
as shown in fig. 1 and 2, the crankshaft oil seal journal pin hole center distance checking fixture comprises a checking fixture support 1, a special checking crankshaft 13, and a positioning device and a measuring device which are arranged on the checking fixture support 1; the checking fixture bracket 1 is in an inverted U shape; the positioning device comprises a main shaft left positioning block 2, a main shaft right positioning block 3 and an axial positioning pin 4; the upper parts of the spindle left positioning block 2 and the spindle right positioning block 3 are respectively arranged at the bottoms of the left end and the right end of the checking fixture bracket 1, and the lower parts of the spindle left positioning block and the spindle right positioning block are respectively provided with an isosceles trapezoid notch; the axial positioning pin 4 is connected to the side surface of the spindle right positioning block 3 facing the outer side of the checking fixture support 1; the measuring device comprises a meter placing frame 5, a dial indicator 6 and an auxiliary pin 12; one end of the gauge placing frame 5 is connected to the side face of the checking fixture support 1, and a gauge placing through hole 10 is formed near the end part of the other end of the gauge placing frame; the measuring head at the bottom of the dial indicator 6 is movably fixed in the meter placing through hole 10 and penetrates through the meter placing frame 5; the auxiliary pin 12 mates with an oil-sealed journal pin hole 14 on a special proof crankshaft 13.
Example 2:
in the present embodiment, the preferable configurations of the spindle left positioning block 2 and the spindle right positioning block 3 in embodiment 1 are implemented, and the differences are only that: as shown in fig. 3 and 4, reinforcing grooves 7 are formed at the tops of the spindle left positioning block 2 and the spindle right positioning block 3; two lowest ends of the checking fixture support 1 are respectively sleeved in the reinforcing grooves 7 of the spindle left positioning block 2 and the spindle right positioning block 3. A positioning pin mounting hole 8 is formed in the side surface of the spindle right positioning block 3 facing the outer side of the checking fixture support 1; the axial positioning pin 4 is connected with the spindle right positioning block 3 in an interference fit mode through a positioning pin mounting hole 8.
Example 3:
this embodiment is an implementation of the preferred structure of the watch holder 5 in embodiment 1, and the differences are only that: as shown in fig. 5 and 6, the meter placement frame 5 is further provided with an adjusting hole 11; the adjusting hole 11 is communicated with the meter placing through hole 10; an adjusting screw 9 is connected to the adjusting hole 11 through threads. Further preferably, the meter placing frame 5 is in threaded connection with the gauge support 1.
Example 4:
this embodiment is an implementation of the preferred structure of the axial positioning pin 4 in embodiment 1, and the difference is only that: the end part of the axial positioning pin 4 is arc-shaped.
In the above embodiment, the included angle α formed by the two waistlines of the isosceles trapezoid notches of the spindle left positioning block 2 and the spindle right positioning block 3 is 90 °.
The method of use of the above embodiment is as follows:
firstly, checking before detection: inserting an auxiliary pin into a pin hole of a journal of the special proofreading crankshaft oil seal, respectively placing a main shaft left positioning block and a main shaft right positioning block of a detection device on a left main journal and a right main journal of the special proofreading crankshaft, and enabling an axial positioning pin to be close to an axial positioning surface of the special proofreading crankshaft; then, rotating the checking fixture, finding out the highest point of the dial indicator when the detecting head of the dial indicator contacts the auxiliary pin according to the reading of the dial indicator, and calibrating to zero the dial indicator at the position;
and secondly, detecting the center distance of a pin hole of a crankshaft oil seal journal: inserting an auxiliary pin into a pin hole of a crankshaft oil seal journal of the tested crankshaft, respectively placing a main shaft left positioning block and a main shaft right positioning block of the calibrated checking fixture on a left main journal and a right main journal of the tested crankshaft, and enabling an axial positioning pin to be close to an axial positioning surface of the tested crankshaft; then, rotating the checking fixture, finding out the highest point of the auxiliary pin contacted by the detection head of the dial indicator according to the reading of the dial indicator, and reading out a detection value, wherein the detection value is the difference value between the distance from the pin hole of the oil seal journal of the crankshaft to be detected to the axis of the crankshaft and a calibration value, and the difference value is a positive number or a negative number;
thirdly, conversion of measured values: setting a calibration value for specially calibrating the distance from a journal pin hole of the crankshaft oil seal to the central axis of the crankshaft in the first step of the method as H1; in the second step, the detected value of the distance between the journal pin hole of the crankshaft oil seal to be measured and the central axis of the crankshaft is set as H2, and the distance between the journal pin hole of the crankshaft oil seal to be measured and the central axis of the crankshaft is set as H, so that H = H1+ H2.
Through in-service use, examine a back through the proofreading, can measure the distance of bent axle oil blanket axle journal pinhole to bent axle axis fast in ten seconds, judge whether pinhole position is up to standard, greatly promoted product detection efficiency.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A crankshaft oil seal journal pin hole center distance detection tool comprises a detection tool support (1), a special calibration crankshaft (13), and a positioning device and a measuring device which are arranged on the detection tool support (1); the method is characterized in that:
the checking fixture support (1) is in an inverted U shape;
the positioning device comprises a main shaft left positioning block (2), a main shaft right positioning block (3) and an axial positioning pin (4); the upper parts of the main shaft left positioning block (2) and the main shaft right positioning block (3) are respectively arranged at the bottoms of the left end and the right end of the checking fixture support (1), and the lower parts of the main shaft left positioning block and the main shaft right positioning block are respectively provided with an isosceles trapezoid notch; the axial positioning pin (4) is connected to the side surface of the spindle right positioning block (3) facing the outer side of the checking fixture support (1);
the measuring device comprises a meter placing frame (5), a dial indicator (6) and an auxiliary pin (12); one end of the gauge placing frame (5) is connected to the side face of the checking fixture support (1), and a gauge placing through hole (10) is formed near the end part of the other end of the gauge placing frame; the measuring head at the bottom of the dial indicator (6) is movably fixed in the meter placing through hole (10) and penetrates through the meter placing frame (5); the auxiliary pin (12) is matched with an oil seal journal pin hole (14) on a special calibration crankshaft (13).
2. The crankshaft oil seal journal pin hole center distance detection tool according to claim 1, characterized in that: and the extension lines of the two waist lines of the isosceles trapezoid notches intersect to form an angle alpha, and the angle alpha is 90 degrees.
3. The crankshaft oil seal journal pin hole center distance detection tool according to claim 1 or 2, characterized in that: reinforcing grooves (7) are formed in the tops of the main shaft left positioning block (2) and the main shaft right positioning block (3); the two lowest ends of the checking fixture support (1) are respectively sleeved into the reinforcing grooves (7) of the spindle left positioning block (2) and the spindle right positioning block (3).
4. The crankshaft oil seal journal pin hole center distance detection tool according to claim 1, characterized in that: a positioning pin mounting hole (8) is formed in the side surface, facing the outer side of the checking fixture support (1), of the spindle right positioning block (3); the axial positioning pin (4) is connected with the spindle right positioning block (3) in an interference fit mode through a positioning pin mounting hole (8).
5. The crankshaft oil seal journal pin hole center distance detection tool according to claim 1, characterized in that: the meter placing frame (5) is also provided with an adjusting hole (11); the adjusting hole (11) is communicated with the meter placing through hole (10); an adjusting screw (9) is connected to the adjusting hole (11) through threads.
6. The crankshaft oil seal journal pin hole center distance detection tool according to claim 1 or 4, characterized in that: the end part of the axial positioning pin (4) is arc-shaped.
7. The crankshaft oil seal journal pin hole center distance detection tool according to claim 1 or 5, characterized in that: the meter placing frame (5) is in threaded connection with the gauge support (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020861174.8U CN212320605U (en) | 2020-05-21 | 2020-05-21 | Crankshaft oil seal journal pin hole center distance detection tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020861174.8U CN212320605U (en) | 2020-05-21 | 2020-05-21 | Crankshaft oil seal journal pin hole center distance detection tool |
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| CN212320605U true CN212320605U (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020861174.8U Active CN212320605U (en) | 2020-05-21 | 2020-05-21 | Crankshaft oil seal journal pin hole center distance detection tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114894062A (en) * | 2022-06-29 | 2022-08-12 | 中国航发动力股份有限公司 | Detection device and method for journal blade assembly hole |
-
2020
- 2020-05-21 CN CN202020861174.8U patent/CN212320605U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114894062A (en) * | 2022-06-29 | 2022-08-12 | 中国航发动力股份有限公司 | Detection device and method for journal blade assembly hole |
| CN114894062B (en) * | 2022-06-29 | 2023-07-18 | 中国航发动力股份有限公司 | Detection device and method for journal blade assembly holes |
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