Crankcase detection tool
By designing crankcase detection and inspection tools, including position detection and concentricity detection equipment, the problem of low efficiency of crankcase concentricity detection in the prior art is solved, and a more efficient and accurate detection process is achieved.
Patent Information
- Application Number
- CN202421553005.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The prior art detects the concentricity of the crankcase, which affects the working efficiency.
A crankcase inspection tool is designed, including positional inspection tool and concentricity inspection tool. The position degree detector is used to detect the hole-hole position degree of the front and rear crankcases, and the concentricity detector is used to detect the assembled front and rear crankcases. By detecting the positionality of the pin hole and bearing hole, the problem of hole position deviation is eliminated in advance and the detection efficiency is improved.
By detecting the position of the pin hole and bearing hole in advance, avoiding the situation where the pin hole cannot match through the concentricity detection, improving the detection efficiency and ensuring the accuracy and speed of the concentricity detection.
Smart Images
Figure CN222881993U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of detection tooling structures, in particular to a crankcase detection fixture. Background Art
[0002] The crankcase generally includes a front crankcase and a rear crankcase. After the front crankcase and the rear crankcase are processed, they are fixed and connected by bolts. If there is an error in the processing of the front crankcase and the rear crankcase, it is easy to cause crankshaft damage, large vibration and other adverse phenomena after the crankshaft is installed, affecting the service life of the machine. Therefore, the front crankcase and the rear crankcase need to be tested for concentricity after assembly. The current concentricity test basically needs to be carried out using a three-coordinate measuring machine. The data is accurate, but the detection efficiency is slow, which seriously affects work efficiency. Utility Model Content
[0003] The purpose of at least one specific implementation manner of the utility model is to solve the defects existing in the prior art and provide a crankcase detection fixture.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0005] A crankcase inspection fixture, comprising:
[0006] Position gauge, used to perform hole-to-hole position inspection on the front crankcase and rear crankcase respectively;
[0007] The concentricity inspection fixture is used to inspect the concentricity of the assembled front crankcase and rear crankcase.
[0008] Further, the position checking fixture includes: a check block;
[0009] A first mandrel is inserted into the calibration block;
[0010] The first positioning pin is inserted into the calibration block.
[0011] Furthermore, the concentricity inspection tool includes a second core rod and a second positioning pin.
[0012] Furthermore, when the hole-to-hole position detection is performed on the rear crankcase, the first positioning pin cooperates with at least two first pin holes on the rear crankcase, and the through hole on the verification block is suitable for inserting the first core rod. When the first core rod can be normally inserted into the bottom of the bearing hole on the rear crankcase, the hole-to-hole position detection of the rear crankcase is qualified.
[0013] Furthermore, when the hole-to-hole position detection is performed on the front crankcase, the first positioning pin cooperates with at least two second pin holes on the front crankcase, and the through hole on the verification block is suitable for inserting the first core rod. When the first core rod can be normally inserted into the bottom of the bearing hole on the front crankcase, the hole-to-hole position detection of the front crankcase is qualified.
[0014] Furthermore, when the assembled front crankcase and rear crankcase are tested for concentricity, if the second core rod can penetrate the bearing hole on the front crankcase and extend into the bottom of the bearing hole on the rear crankcase, the concentricity test of the front crankcase and the rear crankcase is qualified.
[0015] Furthermore, when the front crankcase and the rear crankcase are assembled, the first pin hole of the rear crankcase corresponds to the second pin hole of the front crankcase and is positioned by the second locating pin. After being positioned, the front crankcase and the rear crankcase are connected by a fixing member. A cover shell is installed on one side of the front crankcase, and the cover shell is positioned with the front crankcase by the second locating pin. After being positioned, the cover shell and the front crankcase are connected by a fixing member.
[0016] Further, the diameter of the first core rod is smaller than or equal to the diameter of the bearing holes of the front crankcase and the rear crankcase, and the diameter of the first core rod is larger than the diameter of the lower end hole of the bearing hole.
[0017] Further, the second mandrel includes a first insertion portion, a second insertion portion and a third insertion portion;
[0018] When the assembled front crankcase and rear crankcase are tested for concentricity, the first insertion portion is used to detect the cover hole of the cover, the second insertion portion is used to detect the front crankcase hole of the front crankcase, and the third insertion portion is used to detect the rear crankcase hole of the rear crankcase;
[0019] A limiting surface is provided on one side of the first inserting portion, and a diameter of the limiting surface is greater than a diameter of the cover shell hole.
[0020] Furthermore, anti-slip contact surfaces are provided at the gripping parts of the first mandrel and the second mandrel.
[0021] The crankcase inspection and testing fixture provided by the present application has the beneficial technical effect compared with the prior art in that: the position inspection and testing fixture of the present application can respectively inspect the position of the pin holes and the bearing holes of the front crankcase and the rear crankcase of the crankcase, thereby avoiding the situation that the pin holes cannot match and pass through during the concentricity inspection process, and eliminating the problem of the position deviation of the holes during the production of the rear crankcase or the front crankcase in advance, thereby improving the inspection efficiency;
[0022] After the position detection of the pin holes and bearing holes of the front crankcase and the rear crankcase is completed, when the concentricity inspection fixture of the present application performs concentricity inspection on the assembled front crankcase and the rear crankcase, when the second core rod can penetrate the bearing hole on the front crankcase and extend into the bottom of the bearing hole on the rear crankcase, the concentricity inspection of the front crankcase and the rear crankcase is qualified, and the concentricity inspection process is convenient and fast with high inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0024] Figure 1 This is a schematic diagram of the structure of the position gauge for this application;
[0025] Figure 2 This is a schematic diagram of the structure of the concentricity inspection fixture of this application;
[0026] Figure 3 A schematic diagram of the structure of the rear crankcase tested for this application;
[0027] Figure 4 A top view of the rear crankcase tested for this application;
[0028] Figure 5 for Figure 4 Schematic diagram of the cross section along line AA;
[0029] Figure 6 This is a schematic diagram of the position inspection tool performing position inspection on the rear crankcase;
[0030] Figure 7 for Figure 6 Schematic diagram of the decomposition of
[0031] Figure 8 It is a cross-sectional schematic diagram of the position inspection tool performing position inspection on the rear crankcase;
[0032] Fig. 9 A schematic diagram of the structure of the front crankcase tested for this application;
[0033] Fig.10 A schematic top view of the front crankcase tested for this application;
[0034] Fig.11 A bottom view schematic diagram of the front crankcase tested for this application;
[0035] Fig.12 It is a schematic diagram of the structure after the front crankcase and the rear crankcase are assembled;
[0036] Fig.13 This is a top view of the front crankcase and rear crankcase after assembly;
[0037] Fig.14 for Fig.13 Schematic diagram of the cross section along line BB;
[0038] Fig.15It is a schematic diagram of the concentricity inspection tool performing concentricity inspection on the assembled front crankcase and rear crankcase;
[0039] Fig.16 for Fig.15 Schematic diagram of the decomposition of
[0040] Fig.17 It is a cross-sectional schematic diagram of the concentricity inspection fixture for inspecting the concentricity of the assembled front crankcase and rear crankcase. DETAILED DESCRIPTION
[0041] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0042] Reference Figure 1 , Figure 2 , a crankcase inspection fixture, comprising:
[0043] A position measuring fixture 100 is used to perform hole-to-hole position measuring on the front crankcase 10 and the rear crankcase 20 of the crankcase respectively;
[0044] The concentricity inspection jig 200 is used to inspect the concentricity of the assembled front crankcase 10 and rear crankcase 20 .
[0045] The position gauge 100 includes a check block 110 , a first mandrel 120 inserted into the check block 110 , and a plurality of first positioning pins 130 , wherein a non-slip contact surface 140 is provided at a grip of the first mandrel 120 .
[0046] The concentricity gauge 200 includes a second mandrel 210 and a second positioning pin 220 , and a non-slip contact surface 230 is provided at the grip of the second mandrel 210 , wherein the second mandrel 210 is designed as a trapezoidal structure, and the second mandrel 210 includes a first insertion portion 211 , a second insertion portion 212 and a third insertion portion 213 , and a limiting surface 214 is provided on one side of the first insertion portion 211 .
[0047] When the crankcase is tested for concentricity, the positions of the pin holes and the bearing holes of the processed front crankcase 10 and rear crankcase 20 need to be tested respectively.
[0048] Reference Figure 3 , Figure 4 , Figure 5A bearing hole 201 is provided at the inner center of the rear crankcase 20, at least two first pin holes 202 are provided on the assembly surface of the rear crankcase 20, and a rear crankcase hole 203 (end hole) is provided on one side of the bearing hole 201;
[0049] Reference Figures 9 to 12 A bearing hole 101 is provided at the inner center of the front crankcase 10, at least two second pin holes 102 are provided on the assembly surface on one side of the front crankcase 10, a third pin hole 103 is provided on the assembly surface on the other side of the front crankcase 10, and a front crankcase hole 104 (end hole) is provided on one side of the bearing hole 101.
[0050] Reference Figure 4 , refer to Figures 6 to 8 When the hole-hole position detection is performed on the rear crankcase 20, the first locating pin 130 cooperates with at least two first pin holes 202 on the rear crankcase 20, and the first core rod 120 is inserted into the through hole on the verification block 110. When the first core rod 120 can be normally inserted into the bottom of the bearing hole 201 on the rear crankcase 20, the hole-hole position detection of the rear crankcase 20 is qualified, specifically, the position detection of the first pin hole 202 and the bearing hole 201 of the rear crankcase 20 is qualified, thereby ensuring that on the same plane perpendicular to the insertion direction of the first core rod 120, the axes of the first pin hole 202 and the bearing hole 201 on the rear crankcase 20 are on the same straight line, and the axes of the two pin holes are at the same distance from the axis of the bearing hole 201, that is, the distance L1 between one first pin hole 202 and the bearing hole 201 is equal to the distance L2 between the other first pin hole 202 and the bearing hole 201, which provides a prerequisite for subsequent concentricity detection.
[0051] Similarly, when the hole-to-hole position detection is performed on the front crankcase 10, the first locating pin 130 cooperates with at least two second pin holes 102 on the front crankcase 10, and the first core rod 120 is inserted into the through hole on the verification block 110. When the first core rod 120 can be normally inserted into the bottom of the bearing hole 101 on the front crankcase 10, the hole-to-hole position detection of the front crankcase 10 is qualified, specifically, the position detection of the second pin hole 102 and the bearing hole 101 of the front crankcase 10 is qualified, which provides conditions for the concentricity detection of the front crankcase 10 and the rear crankcase 20 after subsequent assembly.
[0052] It should be noted that when the hole-to-hole position detection is carried out on the front crankcase 10 and the rear crankcase 20 and the hole size is designed, the diameter of the bearing hole 201 and the bearing hole 101 are slightly larger than the diameter of the first core rod 120. In order to improve the detection accuracy, in an ideal state, the diameter of the bearing hole 201 and the bearing hole 101 is the same as the diameter of the first core rod 120. Considering that a small gap is required between the first core rod 120 and the bearing holes 201 and 101 for easy insertion, in actual design, the diameter difference between the first core rod 120 and the bearing holes 201 and 101 will be greater than 0 mm. In theory, the closer the diameter difference is to 0 mm, the better.
[0053] The diameters of the rear crankcase hole 203 (end hole) and the front crankcase hole 104 (end hole) are smaller than the diameter of the first core rod 120 , so as to prevent the first core rod 120 from coming out of the end holes after being inserted into the bearing holes 201 and 101 .
[0054] Reference Figures 12 to 17 After the hole-hole position detection of the front crankcase 10 and the rear crankcase 20 is qualified, the front crankcase 10 and the rear crankcase 20 need to be assembled. Since the crankcase has a cover 30, the front crankcase 10, the rear crankcase 20 and the cover 30 need to be assembled during assembly. The assembly steps are as follows:
[0055] S1. Install the second positioning pin 220 into the first pin hole 202 of the rear crankcase 20.
[0056] S2, plugging the second positioning pin 220 in the first pin hole 202 into the second pin hole 102 on the front crankcase 10, so as to realize the assembly positioning of the front crankcase 10 and the rear crankcase 20;
[0057] S3, the front crankcase 10 and the rear crankcase 20 are fastened and connected by screws 40 (fixing members).
[0058] S4. Install the other second positioning pins 220 into the third pin holes 103 of the front crankcase 10 .
[0059] S5. The cover shell 30 is provided with a fourth pin hole 301. The second positioning pin 220 in the third pin hole 103 is plugged into the fourth pin hole 301 on the cover shell 30 to achieve assembly positioning of the cover shell 30 and the front crankcase 10.
[0060] S6. Fasten the cover 30 and the front crankcase 10 together by means of screws 40 (fixing members).
[0061] When the assembled front crankcase 10, rear crankcase 20 and cover shell 30 are tested for concentricity, the second core rod 210 is inserted from one side of the cover shell 30. When the second core rod 210 can pass through the bearing hole 101 on the front crankcase 10 and extend to the bottom of the bearing hole 201 on the rear crankcase 20, the concentricity test of the front crankcase 10, rear crankcase 20 and cover shell 30 is qualified.
[0062] When the assembled front crankcase 10 and rear crankcase 20 are tested for concentricity, the first insertion portion 211 of the second mandrel 210 is used to detect the diameter of the housing hole 302 of the housing 30, the second insertion portion 212 is used to detect the diameter of the front crankcase hole 104 of the front crankcase 10, and the third insertion portion 213 is used to detect the diameter of the rear crankcase hole 203 of the rear crankcase 20. The diameter of the limiting surface 214 is larger than the diameter of the housing hole 302 to prevent the second mandrel from coming out of the end hole after insertion. In actual situations, the diameter of each insertion portion on the second mandrel 210 is slightly smaller than the diameter of the corresponding holes, so that there is a small gap during the insertion of the second mandrel 210, which is convenient for insertion. Therefore, the diameter difference between the first insertion portion 211, the second insertion portion 212, and the third insertion portion 213 of the second mandrel 210 and the corresponding holes is theoretically closer to 0 mm, the better, which can improve the accuracy of concentricity detection.
[0063] In summary, the position inspection fixture 100 of the present application can perform position inspection of the pin holes and bearing holes of the front crankcase 10 and the rear crankcase 20 of the crankcase, respectively, to avoid the situation where the pin holes cannot match and pass through during the concentricity inspection process, and to eliminate the problem of the position deviation of the holes during the production of the rear crankcase 20 or the front crankcase 10 in advance, thereby improving the inspection efficiency;
[0064] After the position detection of the pin holes and bearing holes of the front crankcase 10 and the rear crankcase 20 is completed, when the concentricity inspection fixture 200 of the present application performs concentricity inspection on the assembled front crankcase 10 and the rear crankcase 20, when the second core rod 210 can penetrate the bearing hole on the front crankcase 10 and extend into the bottom of the bearing hole on the rear crankcase 20, the concentricity inspection of the front crankcase 10 and the rear crankcase 20 is qualified, and the concentricity inspection process is convenient and fast, and the inspection efficiency is high.
[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A crankcase inspection fixture, characterized in that: include: Position gauge, used to perform hole-to-hole position inspection on the front crankcase and rear crankcase respectively; The concentricity inspection fixture is used to inspect the concentricity of the assembled front crankcase and rear crankcase.
2. The crankcase inspection fixture according to claim 1, characterized in that: The position checking fixture comprises: a check block; A first mandrel, inserted into the calibration block; The first positioning pin is inserted into the verification block.
3. The crankcase inspection fixture according to claim 2, characterized in that: The concentricity checker comprises a second core rod and a second positioning pin.
4. The crankcase inspection fixture according to claim 2, characterized in that: When the hole-to-hole position detection is performed on the rear crankcase, the first locating pin cooperates with at least two first pin holes on the rear crankcase, and the through hole on the verification block is suitable for inserting the first mandrel. When the first mandrel can be normally inserted into the bottom of the bearing hole on the rear crankcase, the hole-to-hole position detection of the rear crankcase is qualified.
5. The crankcase inspection fixture according to claim 2, characterized in that: When the hole-to-hole position detection is performed on the front crankcase, the first positioning pin cooperates with at least two second pin holes on the front crankcase, and the through hole on the verification block is suitable for inserting the first mandrel. When the first mandrel can be normally inserted into the bottom of the bearing hole on the front crankcase, the hole-to-hole position detection of the front crankcase is qualified.
6. The crankcase inspection fixture according to claim 3, characterized in that: When the assembled front crankcase and rear crankcase are tested for concentricity, if the second core rod can penetrate the bearing hole on the front crankcase and extend into the bottom of the bearing hole on the rear crankcase, the concentricity test of the front crankcase and rear crankcase is qualified.
7. The crankcase inspection fixture according to claim 6, characterized in that: When the front crankcase and the rear crankcase are assembled, the first pin hole of the rear crankcase corresponds to the second pin hole of the front crankcase and is positioned by the second positioning pin. After being positioned, the front crankcase and the rear crankcase are connected by a fixing member. A cover shell is installed on one side of the front crankcase, and the cover shell is positioned with the front crankcase by the second positioning pin. After being positioned, the cover shell and the front crankcase are connected by a fixing member.
8. The crankcase inspection fixture according to claim 4, characterized in that: The diameter of the first core rod is smaller than or equal to the diameter of the bearing holes of the front crankcase and the rear crankcase, and the diameter of the first core rod is larger than the diameter of the lower end hole of the bearing hole.
9. The crankcase inspection fixture according to claim 7, characterized in that: The second mandrel includes a first insertion portion, a second insertion portion, and a third insertion portion; When the assembled front crankcase and rear crankcase are tested for concentricity, the first insertion portion is used to detect the housing hole of the housing, the second insertion portion is used to detect the front crankcase hole of the front crankcase, and the third insertion portion is used to detect the rear crankcase hole of the rear crankcase; A limiting surface is provided on one side of the first insertion portion, and a diameter of the limiting surface is greater than a diameter of the housing hole.
10. The crankcase inspection fixture according to claim 3, characterized in that: The gripping parts of the first core rod and the second core rod are provided with anti-slip contact surfaces.