Diesel rocker head Rockwell hardness detection alignment tool
By designing a sleeve, positioning hole, and inclined surface to fix the mandrel, combined with auxiliary positioning components and movable clamping plates, the problem of inaccurate data caused by the shape of the diesel rocker arm mandrel in Rockwell hardness testing was solved, achieving a highly accurate and safe testing process.
Patent Information
- Application Number
- CN202422826075.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-20
AI Technical Summary
When testing the Rockwell hardness of diesel rocker arm, the semi-spherical shape of the mandrel prevents it from tightening properly when the pressure rod is pressed down, resulting in inaccurate test data.
A positioning fixture for testing the Rockwell hardness of a diesel rocker arm mandrel was designed, including a sleeve, a positioning hole, and an inclined plane. By inserting the bottom of the mandrel into the positioning hole and fixing it with the inclined plane, movement of the mandrel is prevented. At the same time, the auxiliary positioning components and the cooperation of the movable clamp and the connecting spring are used to ensure stability during the testing process.
It improves the accuracy of detection data, enhances the safety and ease of operation of the detection process, and avoids the movement and displacement of the probe during the detection process.
Smart Images
Figure CN223500829U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of alignment tooling technology, and in particular to an alignment tooling for testing the Rockwell hardness of a diesel rocker arm top. Background Technology
[0002] The diesel rocker arm plays a crucial role in the valve train of a diesel engine. Its main function is to work with the camshaft to change the direction of the motion and force transmitted from the pushrod and cam to the valve, so that it can open and complete the intake and exhaust processes of the engine.
[0003] Because the diesel rocker arm mandrel is hemispherical, the Rockwell hardness tester's pressure rod cannot press the mandrel firmly during Rockwell hardness testing due to the curvature of the sphere. The test piece may also move, resulting in inaccurate test data. Therefore, we propose a Rockwell hardness test alignment fixture for diesel rocker arm mandrels. Utility Model Content
[0004] The purpose of this invention is to provide a positioning fixture for testing the Rockwell hardness of a diesel rocker arm mandrel, which can conveniently fix the mandrel to prevent it from moving.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a positioning fixture for testing the Rockwell hardness of a diesel rocker arm top, comprising a sleeve, a positioning hole formed on the sleeve, and an inclined surface formed on the surface of the sleeve.
[0006] By adopting the above technical solution, the bottom of the mandrel is inserted into the positioning hole to fix the mandrel on the sleeve. Then, the inclined surface is used to prevent the mandrel from moving under force, so that when the press is performing Rockwell hardness testing on the mandrel, the mandrel will not move when the press rod is pressed down, thereby improving the accuracy of the test data.
[0007] A further feature of this invention is that the sleeve is made of cemented carbide.
[0008] By adopting the above technical solution, it is beneficial to improve the hardness of the sleeve and facilitate the Rockwell hardness test of the mandrel.
[0009] A further feature of this invention is that a connecting component is provided on the outside of the sleeve, and an auxiliary positioning component is provided on the connecting component.
[0010] By adopting the above technical solution, the auxiliary positioning component can easily position the sleeve on the press. During the testing process, there is no need for manual support of the sleeve, which improves safety. The connecting component makes it easy to separate the auxiliary positioning component from the sleeve, facilitating the storage and organization of the sleeve.
[0011] A further feature of this invention is that the connecting assembly includes a thread provided on the outside of the sleeve, a connecting ring fitted on the outside of the sleeve, and a threaded groove formed on the inner side of the connecting ring and cooperating with the thread.
[0012] By adopting the above technical solution, the connecting ring and the sleeve can be separated or connected through the cooperation of the thread and the thread groove. When performing Rockwell hardness testing on the mandrel, the auxiliary positioning component on the connecting ring can be connected to the sleeve. During the testing process, there is no need for manual support of the sleeve, which improves safety. After the test is completed, the auxiliary positioning component on the connecting ring can be separated from the sleeve, making it convenient to store and organize the sleeve.
[0013] A further feature of this invention is that the auxiliary positioning assembly includes a mounting plate rotatably connected to the outside of the connecting ring, a fixed side plate mounted on the bottom of the mounting plate, a movable clamping plate slidably connected to the bottom of the mounting plate, and a connecting spring connecting the movable clamping plate and the fixed side plate.
[0014] By adopting the above technical solution, the movable clamping plate slides on the bottom of the mounting plate through the connecting spring. When performing Rockwell hardness testing on the top head, the movable clamping plate can be made to fit against the base on the press. Then, the elasticity of the connecting spring makes the movable clamping plate fit more firmly against the base on the press. During the testing process, there is no need for manual support of the sleeve, which improves safety.
[0015] A further feature of this invention is that the mounting plate is rotatably connected to the connecting ring via a bearing.
[0016] By adopting the above technical solution, when the rotating connecting ring is connected or separated from the sleeve, the mounting plate will not rotate with it, requiring less force to rotate and making rotation more effortless.
[0017] A further feature of this invention is that the thickness of the mounting plate is less than the thickness of the connecting ring.
[0018] By adopting the above technical solution, it is convenient to directly rotate the connecting ring to connect or separate it from the sleeve.
[0019] A further feature of this invention is that the number of movable clamps and fixed side plates is not less than four, and they are all distributed in a ring at equal intervals.
[0020] By adopting the above technical solution, the movable clamping plate can be made to fit with the base on the press from multiple directions, which further improves the firmness of the fit between the movable clamping plate and the base on the press and prevents the sleeve from shifting on the press during the testing process.
[0021] A further feature of this invention is that the bottom of the fixed side plate is flush with the bottom of the mounting plate, and the bottom of the movable clamping plate rests below the sleeve.
[0022] By adopting the above technical solution, the fixed side plate does not contact the base of the press, while ensuring that the movable clamping plate can contact the base of the press. The fixed side plate does not contact the base of the press, thus allowing the movable clamping plate to fit snugly against the base of the press.
[0023] A further feature of this invention is that a rubber protrusion is installed on the side of the movable clamp near the sleeve.
[0024] By adopting the above technical solution, the rubber protrusion can further improve the firmness of the fit between the movable clamp and the base on the press, and prevent the sleeve from shifting on the press during the testing process.
[0025] The beneficial effects of this utility model are:
[0026] 1. Insert the bottom of the mandrel into the positioning hole to fix the mandrel onto the sleeve. Then, use the inclined surface to prevent the mandrel from moving under force, so that when the press rod is pressed down during the Rockwell hardness test of the mandrel, the mandrel will not move, thereby improving the accuracy of the test data.
[0027] 2. The movable clamp slides on the bottom of the mounting plate via a connecting spring. When performing Rockwell hardness testing on the top head, the movable clamp can be made to fit against the base on the press. Then, the elasticity of the connecting spring makes the movable clamp fit more firmly against the base on the press. During the testing process, there is no need for manual support of the sleeve, which enhances safety. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of the structure of this utility model;
[0030] Figure 2 This is a schematic diagram of the assembly of this utility model with the rocker arm top.
[0031] In the diagram, 1 is the sleeve; 2 is the positioning hole; 3 is the bevel; 4 is the thread; 5 is the connecting ring; 6 is the threaded groove; 7 is the mounting plate; 8 is the fixed side plate; 9 is the movable clamping plate; 10 is the connecting spring; and 11 is the rubber protrusion. Detailed Implementation
[0032] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0033] Please see Figure 1-2 This utility model provides a positioning fixture for testing the Rockwell hardness of a diesel rocker arm, including a sleeve 1, a positioning hole 2 opened on the sleeve 1, and an inclined surface 3 opened on the surface of the sleeve 1.
[0034] The bottom of the mandrel is inserted into the positioning hole 2 to fix the mandrel onto the sleeve 1. The inclined surface 3 is used to prevent the mandrel from moving under force, so that when the press rod is pressed down to test the Rockwell hardness of the mandrel, the mandrel will not move, thereby improving the accuracy of the test data.
[0035] Sleeve 1 is made of cemented carbide, which helps to improve the hardness of sleeve 1 and facilitates Rockwell hardness testing of the mandrel.
[0036] The sleeve 1 is provided with a connecting component on its exterior, and an auxiliary positioning component is provided on the connecting component. The auxiliary positioning component can facilitate the positioning of the sleeve 1 on the press. During the testing process, there is no need for manual support of the sleeve 1, which improves safety. The connecting component can also facilitate the separation of the auxiliary positioning component from the sleeve 1, making it convenient to store and organize the sleeve 1.
[0037] The connecting assembly includes a thread 4 on the outside of the sleeve 1, a connecting ring 5 fitted on the outside of the sleeve 1, and a threaded groove 6 formed on the inside of the connecting ring 5 and cooperating with the thread 4. Through the cooperation of the thread 4 and the threaded groove 6, the connecting ring 5 can be separated from or connected to the sleeve 1. When performing Rockwell hardness testing on the mandrel, the auxiliary positioning component on the connecting ring 5 can be connected to the sleeve 1. During the testing process, there is no need for manual support of the sleeve 1, which improves safety. After the testing is completed, the auxiliary positioning component on the connecting ring 5 can be separated from the sleeve 1 for easy storage and organization of the sleeve 1.
[0038] The auxiliary positioning component includes a mounting plate 7 rotatably connected to the outside of the connecting ring 5, a fixed side plate 8 installed at the bottom of the mounting plate 7, a movable clamping plate 9 slidably connected to the bottom of the mounting plate 7, and a connecting spring 10 connecting the movable clamping plate 9 and the fixed side plate 8.
[0039] The movable clamp 9 slides on the bottom of the mounting plate 7 via the connecting spring 10. When performing Rockwell hardness testing on the top head, the movable clamp 9 can be made to fit against the base on the press. Then, the elastic force of the connecting spring 10 makes the movable clamp 9 fit more firmly against the base on the press. During the testing process, there is no need for manual support of the sleeve 1, which makes the testing safer.
[0040] The mounting plate 7 is rotatably connected to the connecting ring 5 via a bearing. When the connecting ring 5 is connected to or separated from the sleeve 1, the mounting plate 7 will not rotate, requiring less force to rotate and making rotation easier.
[0041] The thickness of the mounting plate 7 is less than the thickness of the connecting ring 5, which facilitates direct rotation of the connecting ring 5 to connect or separate it from the sleeve 1.
[0042] The number of movable clamping plates 9 and fixed side plates 8 is not less than four and they are all distributed in a ring at equal distances. This allows the movable clamping plates 9 to fit against the base on the press from multiple directions, further improving the firmness of the fit between the movable clamping plates 9 and the base on the press, and preventing the sleeve 1 from shifting on the press during the testing process.
[0043] The bottom of the fixed side plate 8 is flush with the bottom of the mounting plate 7, and the bottom of the movable clamping plate 9 falls below the sleeve 1, so that the fixed side plate 8 does not contact the base of the press while ensuring that the movable clamping plate 9 can contact the base of the press. The fixed side plate 8 does not contact the base of the press, so that the movable clamping plate 9 can fit against the base of the press.
[0044] A rubber protrusion 11 is installed on the side of the movable clamping plate 9 near the sleeve 1. The rubber protrusion 11 can further improve the firmness of the fit between the movable clamping plate 9 and the base on the press, and prevent the sleeve 1 from shifting on the press during the testing process.
Claims
1. A positioning fixture for testing the Rockwell hardness of a diesel rocker arm mandrel, characterized in that, It includes a sleeve (1), a positioning hole (2) formed on the sleeve (1), and a bevel (3) formed on the surface of the sleeve (1).
2. The alignment fixture for testing the Rockwell hardness of a diesel rocker arm mandrel according to claim 1, characterized in that: The sleeve (1) is made of cemented carbide.
3. The alignment fixture for testing the Rockwell hardness of a diesel rocker arm mandrel according to claim 2, characterized in that: The sleeve (1) is provided with a connecting component on its outside, and an auxiliary positioning component is provided on the connecting component.
4. The alignment fixture for testing the Rockwell hardness of a diesel rocker arm mandrel according to claim 3, characterized in that: The connecting assembly includes a thread (4) on the outside of the sleeve (1), a connecting ring (5) fitted on the outside of the sleeve (1), and a threaded groove (6) formed on the inside of the connecting ring (5) and cooperating with the thread (4).
5. The alignment fixture for testing the Rockwell hardness of a diesel rocker arm mandrel according to claim 4, characterized in that: The auxiliary positioning assembly includes a mounting plate (7) rotatably connected to the outside of the connecting ring (5), a fixed side plate (8) installed at the bottom of the mounting plate (7), a movable clamping plate (9) slidably connected to the bottom of the mounting plate (7), and a connecting spring (10) connecting the movable clamping plate (9) and the fixed side plate (8).
6. The alignment fixture for testing the Rockwell hardness of a diesel rocker arm mandrel according to claim 5, characterized in that: The mounting plate (7) is rotatably connected to the connecting ring (5) via a bearing.
7. The alignment fixture for testing the Rockwell hardness of a diesel rocker arm mandrel according to claim 6, characterized in that: The thickness of the mounting plate (7) is less than the thickness of the connecting ring (5).
8. The alignment fixture for testing the Rockwell hardness of a diesel rocker arm mandrel according to claim 7, characterized in that: The number of movable clamps (9) and fixed side plates (8) is not less than four, and they are all distributed in a ring at equal intervals.
9. The alignment fixture for testing the Rockwell hardness of a diesel rocker arm mandrel according to claim 8, characterized in that: The bottom of the fixed side plate (8) is flush with the bottom of the mounting plate (7), and the bottom of the movable clamp (9) falls below the sleeve (1).
10. The alignment fixture for testing the Rockwell hardness of a diesel rocker arm top as described in claim 9, characterized in that: The movable clamp (9) has a rubber protrusion (11) installed on the side near the sleeve (1).