CN220187621U - Coaxiality detection structure of crankshaft inner hole - Google Patents
Coaxiality detection structure of crankshaft inner hole Download PDFInfo
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- CN220187621U CN220187621U CN202321407400.5U CN202321407400U CN220187621U CN 220187621 U CN220187621 U CN 220187621U CN 202321407400 U CN202321407400 U CN 202321407400U CN 220187621 U CN220187621 U CN 220187621U
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- 238000001514 detection method Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000002985 plastic film Substances 0.000 description 1
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Abstract
The utility model provides a coaxiality detection structure of an inner hole of a crankshaft, which comprises a shell and a mandrel, wherein the mandrel is rotatably arranged on the shell and is matched with a first inner hole of the crankshaft; the detection rod is rotatably arranged in the shell, and one end of the detection rod is propped against the inner wall of the second inner hole; the detecting element is arranged on the shell and abuts against one end, far away from the outer wall of the second inner hole, of the detecting rod and is used for measuring the rotation degree of the detecting rod. Through setting up measuring rod and detecting element, measuring rod and detecting element cooperation use, and the casing is around dabber pivoted in-process, and measuring rod can follow the rotatory a week of inner wall in second hole, and the measuring rod is laminated all the time with the inner wall in second hole, consequently, can reflect the axiality in first hole and second hole through the rotation of measuring rod, and detection process is simple and convenient to the detection accuracy is high.
Description
Technical Field
The utility model relates to the technical field of crankshaft detection, in particular to a coaxiality detection structure of an inner hole of a crankshaft.
Background
In the production and processing of automobile parts, the coaxiality of the crankshaft finished product large end hole has higher requirements, so that the coaxiality of the crankshaft finished product large end hole needs to be detected to ensure that the coaxiality meets the requirements, and special detection equipment is often adopted for the coaxiality detection of the crankshaft inner hole, but because the crankshaft is a long rod piece and is heavy, a plurality of inconveniences exist for the detection of the crankshaft.
The Chinese patent with publication number of CN206601093U discloses a quick coaxiality gauge for an inner hole of a crankshaft, which comprises a detection sleeve, wherein the inner hole of the detection sleeve is a step hole, and the step hole consists of a large hole section and a small hole section; the detection rod is a step shaft composed of an operation section, a positioning section and a detection section which are smaller section by section, the outer diameter of the positioning section is matched with the aperture of the small hole section, and the axial length of the positioning section is smaller than or equal to the small hole Duan Shendu.
According to the technical scheme, whether the lower shaft end of the crankshaft can be inserted into the detection section and the large hole section simultaneously or not can be detected quickly, but the detection accuracy is low, the coaxiality of the inner hole of the crankshaft cannot be accurately judged, and the coaxiality detection structure of the inner hole of the crankshaft is necessary to solve the technical problems.
Disclosure of Invention
In view of this, the present utility model proposes a coaxiality detection structure of a crankshaft inner hole, which can detect the crankshaft inner hole, and by detecting the inner wall of the inner hole for one circle, it can improve the detection precision, and the structure is simple.
The technical scheme of the utility model is realized as follows: the utility model provides a coaxiality detection structure of an inner hole of a crankshaft, which comprises a shell and a mandrel, wherein,
the mandrel is rotatably arranged on the shell and matched with the first inner hole of the crankshaft;
also comprises a detection rod and a detection element, wherein,
the detection rod is rotatably arranged in the shell, and one end of the detection rod is propped against the inner wall of the second inner hole;
the detecting element is arranged on the shell and abuts against one end, far away from the outer wall of the second inner hole, of the detecting rod and is used for measuring the rotation degree of the detecting rod.
On the basis of the technical proposal, preferably, the detection rod comprises a rotating shaft and a supporting rod, wherein,
the rotating shaft is rotatably arranged in the shell;
the supporting rod is fixed on the rotating shaft, one end of the supporting rod is supported on the inner wall of the second inner hole, and the other end of the supporting rod is supported on the detecting element.
On the basis of the technical scheme, preferably, the detection rod further comprises a detection head, the detection head is fixed at one end of the propping rod, which is close to the inner wall of the second inner hole, and the propping rod props against the inner wall of the second inner hole through the detection head.
On the basis of the above technical scheme, preferably, the detecting rod further comprises an elastic piece, wherein the elastic piece is fixed in the shell, one end of the elastic piece is fixed on the shell, the other end of the elastic piece is fixed at one end of the supporting rod far away from the inner wall of the second inner hole, and the elastic piece is positioned at one side of the supporting rod far away from the detecting element.
On the basis of the technical scheme, preferably, the detection element is a dial indicator or a pressure sensor.
On the basis of the above technical solution, preferably, the housing includes a first inner cavity and a second inner cavity, wherein,
the first inner cavity is arranged in the shell, the supporting rod is positioned in the first inner cavity, and the detection element is positioned in the first inner cavity;
the second inner cavity is arranged in the shell and is perpendicular to the first inner cavity, and the detection rod is positioned in the second inner cavity.
On the basis of the technical scheme, preferably, the shell further comprises a rotating hole, the rotating hole is formed in the shell, and the mandrel penetrates through the shell through the rotating hole and is in rotating connection with the shell.
On the basis of the technical proposal, the mandrel preferably comprises a propping section, a middle section and an inserting section, wherein,
the propping section is inserted into the first inner hole and propped against the inner wall of the first inner hole;
the middle section is fixed at one end of the propping section and propped against the inner wall of the third inner hole;
the insertion section is fixed at one end of the middle section far away from the supporting section and is inserted into the rotating hole.
On the basis of the technical scheme, preferably, one end of the shell is propped against the inner wall of the second inner hole and is matched with the second inner hole for use.
And also comprises a bushing and a fixing bolt, wherein,
the bushing is sleeved on the detection element and is arranged on the shell in a sliding manner;
the fixing bolt is arranged on the shell and used for fixing the bushing.
Compared with the prior art, the coaxiality detection structure of the crankshaft inner hole has the following beneficial effects:
(1) Through setting up measuring rod and detecting element, measuring rod and detecting element cooperation use, and the casing is around dabber pivoted in-process, and measuring rod can follow the inner wall rotation of second hole a round, and measuring rod is laminated with the inner wall of second hole all the time, consequently, can reflect the axiality of first hole and second hole through measuring rod's rotation, and the testing process is simple and convenient to the detection accuracy is high;
(2) By arranging the detection head and the elastic piece, the friction between the detection head and the inner wall of the crankshaft is reduced by sliding or rolling friction, the service life is prolonged, and meanwhile, the detection precision can be ensured; the elastic piece can provide elasticity for the supporting rod, so that the supporting rod can be always attached to the inner wall of the second inner hole, and accordingly a circle of the inner wall of the second inner hole can be detected, and the detection precision is further improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a structure for detecting coaxiality of an inner bore of a crankshaft according to the present utility model;
FIG. 2 is a schematic diagram of the structure of the detecting rod in the coaxiality detecting structure of the inner hole of the crankshaft;
fig. 3 is a schematic structural diagram of a mandrel in the coaxiality detection structure of the crankshaft inner hole of the utility model.
Detailed Description
The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.
As shown in fig. 1 to 3, the coaxiality detecting structure of the inner hole of the crankshaft of the present utility model comprises a housing 1 and a mandrel 2, wherein the mandrel 2 is rotatably arranged on the housing 1 and is matched with a first inner hole 101 of the crankshaft 100; the device further comprises a detection rod 3 and a detection element 4, wherein the detection rod 3 is rotatably arranged in the shell 1, and one end of the detection rod is propped against the inner wall of the second inner hole 102; the detecting element 4 is disposed on the housing 1 and abuts against one end of the detecting rod 3 far away from the outer wall of the second inner hole 102, so as to measure the rotation degree of the detecting rod 3.
The crankshaft 100 is provided with a first inner hole 101, a second inner hole 102 and a third inner hole 103, and in order to ensure normal use of the crankshaft 100, the first inner hole 101 and the second inner hole 102 should be kept coaxial, and the detection structure mainly detects coaxiality of the first inner hole 101 and the second inner hole 102.
In order to realize detecting the axiality of bent axle 100 hole to in order to can improve the detection precision, through setting up measuring rod 3 and detecting element 4, measuring rod 3 and detecting element 4 cooperation are used, and casing 1 is around dabber 2 pivoted in-process, and measuring rod 3 can follow the inner wall rotation a round of second hole 102, and measuring rod 3 is laminated all the time with the inner wall of second hole 102, consequently, can reflect the axiality of first hole 101 and second hole 102 through measuring rod 3's rotation, and the testing process is simple and convenient, and the detection precision is high.
As a preferred embodiment, the detecting rod 3 includes a rotating shaft 31 and a holding rod 32, wherein the rotating shaft 31 is rotatably disposed in the housing 1; the supporting rod 32 is fixed on the rotating shaft 31, one end of the supporting rod is supported on the inner wall of the second inner hole 102, and the other end of the supporting rod is supported on the detecting element 4.
In order to facilitate the whole assembly, the shell 1 can adopt a split type splicing design, a mounting hole site is reserved in the shell 1, the rotating shaft 31 is positioned in the mounting hole site, and the supporting rod 32 is sleeved on the rotating shaft 31, so that the front-stage assembly is facilitated, the structure is simple, the use is convenient, and the manufacturing cost is low.
As a preferred embodiment, the detecting rod 3 further includes a detecting head 33, the detecting head 33 is fixed at one end of the abutting rod 32 near the inner wall of the second inner hole 102, and the abutting rod 32 abuts against the inner wall of the second inner hole 102 through the detecting head 33.
In order to reduce friction between the detection head 33 and the inner wall of the crankshaft 100, so that detection accuracy can be ensured, by arranging the detection head 33, the detection head 33 can adopt a hemispherical design or a wheel-shaped structure, and by sliding or rolling friction, friction damage of the detection head 33 is reduced, service life is prolonged, and meanwhile detection accuracy can be ensured.
As a preferred embodiment, the detecting rod 3 further includes an elastic member 34, where the elastic member 34 is fixed in the housing 1, and one end of the elastic member is fixed on the housing 1, and the other end of the elastic member is fixed on the end of the holding rod 32 away from the inner wall of the second inner hole 102, and is located on the side of the holding rod 32 away from the detecting element 4.
In order to make the detection head 33 and the inner wall of the second inner hole 102 always attach, the elastic member 34 may be a spring or a plastic sheet with elasticity by providing the elastic member 34, and the elastic member 34 may provide elastic force for the holding rod 32, so that the holding rod 32 may always attach to the inner wall of the second inner hole 102, and thus, a circle of the inner wall of the second inner hole 102 may be detected.
As a preferred embodiment, the detection element 4 is a dial indicator or a pressure sensor.
In order to detect the rotation degree of the holding rod 32, since the rotation amplitude of the holding rod 32 represents the coaxiality of the first inner hole 101 and the second inner hole 102, the monitoring of the holding rod 32 in the process of rotating for one circle is realized by arranging a dial indicator or a pressure sensor, and the numerical value read by the dial indicator or the pressure sensor is reflected.
It should be noted that, whether the dial indicator or the pressure sensor is used, the angle of the holding rod 32 is detected by contact with the end of the holding rod 32, and the circuit part used here is a conventional technology, so that a detailed description is omitted.
As a preferred embodiment, the housing 1 includes a first inner cavity 11 and a second inner cavity 12, wherein the first inner cavity 11 is disposed in the housing 1, the abutment rod 32 is located in the first inner cavity 11, and the detecting element 4 is located in the first inner cavity 11; the second inner cavity 12 is arranged in the shell 1 and is perpendicular to the first inner cavity 11, and the detection rod 3 is positioned in the second inner cavity 12.
For the convenience to install detecting element 4 and detecting rod 3 to for detecting element 4 detects detecting rod 3 accuracy, through setting up first inner chamber 11 and second inner chamber 12, first inner chamber 11 and second inner chamber 12 mutually perpendicular set up, and first inner chamber 11 and second inner chamber 12 have made things convenient for detecting element 4 and detecting rod 3's installation, and detecting element 4 can detect detecting rod 3's tip in the vertical direction.
As a preferred embodiment, the housing 1 further comprises a rotation hole 13, wherein the rotation hole 13 is disposed in the housing 1, and the spindle 2 penetrates the housing 1 through the rotation hole 13 and is rotatably connected with the same.
Specifically, the casing 1 and the mandrel 2 are designed in a split type, the mandrel 2 is assembled with the casing 1 through the rotation hole 13, and the casing 1 is conveniently rotated around the mandrel 2.
As a preferred embodiment, the mandrel 2 includes an abutting section 21, an intermediate section 22 and an insertion section 23, wherein the abutting section 21 is inserted into the first inner hole 101 and abuts against the inner wall of the first inner hole 101; the middle section 22 is fixed at one end of the supporting section 21 and is supported against the inner wall of the third inner hole 103; the insertion section 23 is fixed to an end of the intermediate section 22 remote from the abutment section 21 and is inserted into the rotation hole 13.
Specifically, the diameter of the abutting section 21 is the same as that of the first inner hole 101, the abutting section 21 can be just inserted into the first inner hole 101, the diameter of the middle section 22 is the same as that of the third inner hole 103, and is larger than that of the abutting section 21 and that of the inserting section 23, so that the abutting section 21 and the inserting section 23 can be separated, the abutting section 21 cannot be inserted into the housing 1, and the crankshaft 100 can be adapted.
As a preferred embodiment, one end of the housing 1 abuts against the inner wall of the second inner hole 102, and is matched with the second inner hole 102.
As a preferred embodiment, the device further comprises a bushing 5 and a fixing bolt 6, wherein the bushing 5 is sleeved on the detecting element 4 and is arranged on the shell 1 in a sliding manner; a fixing bolt 6 is provided on the housing 1 for fixing the bush 5.
The working principle of the embodiment is as follows:
when in use, the abutting section 21 on the mandrel 2 is inserted into the first inner hole 101, the middle section 22 abuts against the third inner hole 103, then the shell 1 is sleeved on the mandrel 2 through the rotating hole 13, the shell 1 can rotate around the mandrel 2, and at the moment, the detecting head 33 abuts against the second inner hole 102;
then, the shell 1 is rotated for a circle, so that the detection head 33 is along the inner wall of the second inner hole 102 for a circle, if the coaxiality of the first inner hole 101 and the second inner hole 102 is low, the detection head 33 is always attached to the inner wall of the second inner hole 102 under the action of the elastic piece 34, so that the supporting rod 32 can rotate, the supporting rod 32 can push the detection element 4, and the detection element 4 reads a value according to the rotation angle of the supporting rod 32;
the larger the range of the numerical variation of the detecting element 4 is, the lower the coaxiality of the first inner hole 101 and the second inner hole 102 is, and the coaxiality of the first inner hole 101 and the second inner hole 102 is detected.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. The coaxiality detection structure of the crankshaft inner hole comprises a shell (1) and a mandrel (2), wherein,
the mandrel (2) is rotatably arranged on the shell (1) and is matched with a first inner hole (101) of the crankshaft (100);
the method is characterized in that: also comprises a detection rod (3) and a detection element (4), wherein,
the detection rod (3) is rotatably arranged in the shell (1), and one end of the detection rod is propped against the inner wall of the second inner hole (102);
the detecting element (4) is arranged on the shell (1) and abuts against one end, far away from the outer wall of the second inner hole (102), of the detecting rod (3) and is used for measuring the rotation degree of the detecting rod (3).
2. The coaxiality detection structure of an inner hole of a crankshaft as claimed in claim 1, wherein: the detection rod (3) comprises a rotating shaft (31) and a supporting rod (32), wherein,
the rotating shaft (31) is rotatably arranged in the shell (1);
the supporting rod (32) is fixed on the rotating shaft (31), one end of the supporting rod is supported on the inner wall of the second inner hole (102), and the other end of the supporting rod is supported on the detecting element (4).
3. The coaxiality detection structure of an inner hole of a crankshaft as claimed in claim 2, wherein: the detection rod (3) further comprises a detection head (33), the detection head (33) is fixed at one end, close to the inner wall of the second inner hole (102), of the supporting rod (32), and the supporting rod (32) supports against the inner wall of the second inner hole (102) through the detection head (33).
4. A crankshaft inner bore coaxiality detecting structure as set forth in claim 3, wherein: the detection rod (3) further comprises an elastic piece (34), the elastic piece (34) is fixed in the shell (1), one end of the elastic piece is fixed on the shell (1), the other end of the elastic piece is fixed at one end, far away from the inner wall of the second inner hole (102), of the supporting rod (32), and the elastic piece is located at one side, far away from the detection element (4), of the supporting rod (32).
5. The coaxiality detection structure of an inner hole of a crankshaft as claimed in claim 1, wherein: the detection element (4) is a dial indicator or a pressure sensor.
6. The coaxiality detection structure for an inner hole of a crankshaft according to claim 4, wherein: the housing (1) comprises a first interior (11) and a second interior (12), wherein,
the first inner cavity (11) is arranged in the shell (1), the supporting rod (32) is positioned in the first inner cavity (11), and the detection element (4) is positioned in the first inner cavity (11);
the second inner cavity (12) is arranged in the shell (1) and is perpendicular to the first inner cavity (11), and the detection rod (3) is positioned in the second inner cavity (12).
7. The coaxiality detection structure for an inner hole of a crankshaft according to claim 6, wherein: the shell (1) further comprises a rotating hole (13), the rotating hole (13) is formed in the shell (1), and the mandrel (2) penetrates through the shell (1) through the rotating hole (13) and is connected with the mandrel in a rotating mode.
8. The coaxiality detection structure for an inner hole of a crankshaft according to claim 7, wherein: the mandrel (2) comprises a supporting section (21), an intermediate section (22) and an inserting section (23), wherein,
the supporting section (21) is inserted into the first inner hole (101) and is supported against the inner wall of the first inner hole (101);
the middle section (22) is fixed at one end of the supporting section (21) and is supported against the inner wall of the third inner hole (103);
the insertion section (23) is fixed at one end of the middle section (22) far away from the abutting section (21) and is inserted into the rotating hole (13).
9. The coaxiality detection structure for an inner hole of a crankshaft according to claim 8, wherein: one end of the shell (1) is propped against the inner wall of the second inner hole (102) and is matched with the second inner hole (102).
10. The coaxiality detection structure of an inner hole of a crankshaft as claimed in claim 1, wherein: also comprises a bushing (5) and a fixing bolt (6), wherein,
the lining (5) is sleeved on the detecting element (4) and is arranged on the shell (1) in a sliding manner;
the fixing bolt (6) is arranged on the shell (1) and is used for fixing the bushing (5).
Priority Applications (1)
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CN202321407400.5U CN220187621U (en) | 2023-06-02 | 2023-06-02 | Coaxiality detection structure of crankshaft inner hole |
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CN202321407400.5U CN220187621U (en) | 2023-06-02 | 2023-06-02 | Coaxiality detection structure of crankshaft inner hole |
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CN202321407400.5U Active CN220187621U (en) | 2023-06-02 | 2023-06-02 | Coaxiality detection structure of crankshaft inner hole |
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Denomination of utility model: A coaxiality detection structure for crankshaft inner holes Granted publication date: 20231215 Pledgee: Agricultural Bank of China Danjiangkou Branch Pledgor: DANJIANGKOU DONGFA CRANKSHAFT Co.,Ltd. Registration number: Y2024980014834 |