Integrated testing fixture for testing included angles of multiple oil holes of crankshaft

Abstract

The utility model discloses an integrated testing fixture for testing included angles of multiple oil holes of a crankshaft, and belongs to the field of automobile part manufacturing. A connecting rod half-tile is arranged on one side of the support, the other side of the support is of a groove structure with a threaded through hole, the upper portion of the spindle half-tile is connected into a groove of the support through a first bolt, and one end of the spindle half-tile is connected with the insert through a second bolt. A groove is formed in the middle of the front side of the connecting rod half-tile and corresponds to the inclined oil hole, the vertical center line of the groove coincides with the vertical center line of the inclined oil hole, and the lower bottom edge of the groove is located on the horizontal extension line of the center line of an orifice of the inclined oil hole and serves as the scale of the inclined oil hole. And detection grooves of straight oil holes are engraved on the main shaft half tile and the insert. Whether the angles of the inclined and straight oil holes are qualified or not is judged by comparing whether the scales of the inclined and straight oil holes are located in the middle positions of the orifices of the inclined and straight oil holes or not, the angles of all the oil holes can be inspected at a time, the purpose of rapidly and accurately inspecting the included angles of the inclined and straight oil holes in batch production can be achieved, the inspection efficiency is high, and the labor intensity is low.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts manufacturing, in particular to an integrated inspection tool which can inspect multiple oil hole angles of a crankshaft at one time. Background Art

[0002] With the continuous iteration of diesel engine products, engine performance is constantly being optimized. To achieve optimal parameters such as lubricating oil film thickness, hydraulic oil film pressure, and friction pressure during the crankshaft's alternating centrifugal and centripetal rotation within the engine, and to minimize the occurrence of dry friction, cavitation, and metal spalling, the oil hole structure design of the engine crankshaft has become increasingly complex. A single crankshaft may have oil holes with more than three tilt angles. Faced with the demand for continuous iterative optimization of engine crankshaft products, crankshaft manufacturers urgently need to design and produce a simple and efficient tool to inspect multiple crankshaft oil hole angles during the mass production process.

[0003] For complex oil hole inspection fixture structures, there are generally two conventional inspection schemes in mass production mode, but they have the following disadvantages:

[0004] (1) Standard parts calibration method: Place the crankshaft to be inspected on a large inspection platform, use rollers to support the crankshaft main journal, ensure that the crankshaft axis is horizontal, then rotate the crankshaft connecting rod to a certain angle and align it with the angular positioning block for angular positioning. The standard height of the oil hole opening at this time is obtained by converting the angle and height. Then make the corresponding standard parts, use a height gauge to compare the height of the standard parts and the oil hole to obtain the test result of whether the oil hole angle is qualified. The angle inspection of all oil holes is completed in this way. The disadvantage of this measurement scheme is that the inspection platform is large in size and requires multiple standard parts. The system is complicated and expensive. The direction of the crankshaft needs to be adjusted multiple times during the inspection to compare different oil holes, which reduces the inspection efficiency. At the same time, the accuracy of the roller support center is high. When the roller is worn, it will affect the positioning of the crankshaft and the inspection accuracy is low.

[0005] (2) Use multiple riding test fixtures for inspection: For the journals of oil holes with different tilt angles, make riding test fixture comparison samples positioned by the outer circle of the crankshaft main journal and the connecting rod journal, test one angle at a time, and complete the inspection of all oil hole angles in groups. The disadvantage of this method is that a set of inspection fixtures must be composed of multiple sub-components. The more angles of the inspected parts, the more sub-components, and the more complicated the set is, which is not conducive to management. In addition, this method can only inspect the oil inlet side of the crankshaft straight oil hole, and cannot inspect the oil outlet side. This method is generally suitable for the inspection of crankshaft oil holes with a single angle. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology, the purpose of the invention of the utility model is to provide an integrated inspection tool for inspecting the angles of multiple oil holes of a crankshaft, so as to achieve the purpose of quickly and accurately inspecting the angles of multiple oil holes of a crankshaft in mass production.

[0007] In order to achieve the above-mentioned purpose of the invention, the utility model provides an integrated inspection fixture for inspecting the angles of multiple oil holes of a crankshaft. A connecting rod half-shell is provided on one side of the bracket, and a groove structure with a threaded through hole is provided on the other side of the bracket. The upper part of the main shaft half-shell is connected to the groove of the bracket by bolt 1, and one end of the main shaft half-shell is connected to the insert by bolt 2.

[0008] Furthermore, the radius of the inner semicircular arc of the connecting rod half-bearing is slightly larger than the radius of the crankshaft connecting rod journal, and a groove is opened in the middle of the front side of the connecting rod half-bearing at a position corresponding to the inclined oil hole. The vertical center line of the groove coincides with the vertical center line of the inclined oil hole, and the lower bottom edge of the groove is on the horizontal extension line of the center line of the inclined oil hole opening. The lower bottom edge of the groove is used as the scale for the inclined oil hole; during inspection, the angle of the inclined oil hole is judged to be qualified by comparing whether the scale of the inclined oil hole is in the middle position of the inclined oil hole opening.

[0009] Furthermore, the lower half of the main shaft half-bearing is a semicircular bearing structure with an inner diameter slightly larger than the outer diameter of the crankshaft main shaft journal, and the upper half of the main shaft half-bearing is a boss structure with a through hole. A gap is provided between the through hole on the boss structure and bolt 1, so that the main shaft half-bearing is in a state where it can move up and down relative to the bracket, and the boss structure is matched with the groove gap of the bracket; the insert connected to the left side of the main shaft half-bearing can rotate freely around the connection point; during inspection, the insert and the main shaft half-bearing jointly wrap the main shaft journal, and the distance from the center of the main shaft half-bearing to the center of the connecting rod half-bearing is consistent with the crank radius H of the crankshaft.

[0010] Furthermore, the six straight oil holes on the crankshaft have three angles, among which, the angle between the center line of the straight oil hole on the first axis and the center line of the adjacent connecting rod journal is α1; the angle between the center line of the straight oil hole on the second axis and the center line of the adjacent connecting rod journal is α2; the angle between the center line of the straight oil hole on the third axis and the center line of the adjacent connecting rod journal is α3.

[0011] Furthermore, the spindle half-bearing and the insert are engraved with detection grooves; the slot on the extension line of the first axis of the straight oil hole of the spindle half-bearing is the entrance scale one of the straight oil hole with an included angle of α1, and the slot on the extension line of the first axis of the straight oil hole of the insert is the exit scale one of the straight oil hole with an included angle of α1; the slot on the extension line of the second axis of the straight oil hole of the spindle half-bearing is the entrance scale two of the straight oil hole with an included angle of α2, and the slot on the extension line of the second axis of the straight oil hole of the insert is the exit scale two of the straight oil hole with an included angle of α2; the slot on the extension line of the third axis of the straight oil hole of the spindle half-bearing is the entrance scale three of the straight oil hole with an included angle of α3, and the slot on the extension line of the third axis of the straight oil hole of the insert is the exit scale three of the straight oil hole with an included angle of α3; during inspection, whether the angle of the straight oil hole is qualified is judged by comparing whether the scale is located in the middle position of the straight oil hole orifice.

[0012] Compared with the existing technology, the present invention determines whether the angles of the oblique and straight oil holes are qualified by comparing whether the scales of the oblique and straight oil holes are located in the middle of the oblique and straight oil hole openings. This allows all oil hole angles to be inspected at once, enabling rapid and accurate inspection of the angles of oblique and straight oil holes in mass production. The device has a simple structure and is easy to carry, significantly improving inspection efficiency and reducing operator labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0014] Figure 1 It is a simplified structural diagram of the utility model.

[0015] Figure 2 for Figure 1 AA cross-sectional view.

[0016] Figure 3 for Figure 1 Left view of .

[0017] Figure 4 for Figure 2 Left view of the local structure.

[0018] In the figure: 1. Bracket; 2. Bolt 1; 3. Spindle half-bearing; 4. Inlet scale 1; 5. Straight oil hole; 6. Inlet scale 2; 7. Inlet scale 3; 8. Inclined oil hole; 9. Inclined oil hole scale; 10. Connecting rod journal; 11. Spindle journal; 12. Bolt 2; 13. Insert; 14. Straight oil hole axis 1; 15. Straight oil hole axis 2; 16. Straight oil hole axis 3; 17. Outlet scale 3; 18. Outlet scale 2; 19. Outlet scale 1; 20. Crankshaft; 21. Connecting rod journal centerline; 22. Connecting rod half-bearing; 23. Groove. DETAILED DESCRIPTION

[0019] In order to make the invention purpose, technical solution and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not intended to limit the scope of protection of the utility model.

[0020] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, there are seven main shaft journals 11 and six connecting rod journals 10 on the crankshaft 20, and each connecting rod journal 10 has an inclined oil hole 8 with a fixed angle. It is required that the angle between the opening of the inclined oil hole 8 and the line connecting the center of the connecting rod journal 10 and the center line 21 of the connecting rod journal is a fixed value β. Each inclined oil hole 8 intersects with the straight oil hole 5 on the adjacent main shaft journal 11, and the straight oil hole 5 is required to form an angle with the center line 21 of the adjacent connecting rod journal. In order to ensure the optimal state of lubrication and other performance, the six straight oil holes 5 on the crankshaft 20 have three angles, among which the angle between the center line of the straight oil hole 14 and the center line 21 of the adjacent connecting rod journal is α1; the angle between the center line of the straight oil hole 15 and the center line 21 of the adjacent connecting rod journal is α2; the angle between the center line of the straight oil hole 16 and the center line 21 of the adjacent connecting rod journal is α3. The utility model is mainly used for testing the inclined oil holes 8 with the same inclined angle and the straight oil holes 5 with three different inclined angles.

[0021] The utility model provides an integrated inspection tool for inspecting the angles of multiple oil holes of a crankshaft. One side of the bracket 1 is provided with a connecting rod half-bearing 22, and the other side of the bracket 1 is a groove structure with a threaded through hole. The upper part of the main shaft half-bearing 3 is connected to the groove of the bracket 1 by a bolt 2, and one end of the main shaft half-bearing 3 is connected to the insert 13 by a bolt 12.

[0022] The inner semicircular arc radius of the connecting rod half-bearing 22 is slightly larger than the radius of the connecting rod journal 10 of the crankshaft 20, so that the connecting rod half-bearing 22 can fit better on the outer circle of the connecting rod journal 10. A groove 23 is opened in the middle of the front side of the connecting rod half-bearing 22 at a position corresponding to the inclined oil hole 8. The vertical center line of the groove 23 coincides with the vertical center line of the inclined oil hole 8, and the lower bottom edge of the groove 23 is on the horizontal extension line of the center line of the orifice of the inclined oil hole 8. The lower bottom edge of the groove 23 is used as the inclined oil hole scale 9; during inspection, the angle of the inclined oil hole 8 is judged to be qualified by comparing whether the inclined oil hole scale 9 is in the middle position of the orifice of the inclined oil hole 8.

[0023] The lower half of the spindle half-bearing 3 is a semicircular block structure with an inner diameter slightly larger than the outer diameter of the crankshaft 20 spindle journal 11. The upper half of the spindle half-bearing 3 is a boss structure with a through hole. A gap is provided between the through hole on the boss structure and the bolt 2, so as to ensure that the spindle half-bearing 3 is in a state of relative movement up and down relative to the bracket 1. The boss structure is in a clearance fit with the groove of the bracket 1. In order to ensure that the inlet and outlet points of the straight oil hole 5 can be inspected simultaneously during the inspection of the inspection tool, a special screw thread is provided on the spindle half-bearing 3. An insert 13 is connected to the left side by a second bolt 12, and this insert 13 can rotate freely around the connection point; before inspection, the insert 13 is rotated outward to open the inspection fixture. During inspection, the main shaft half-shell 3 falls to fit the outer circle of the main shaft journal 11, and the rotating insert 13 fits the main shaft journal 11. At this time, the insert 13 and the main shaft half-shell 3 together wrap the main shaft journal 11, completing the positioning of a inspection fixture. At this time, the distance from the center of the main shaft half-shell 3 to the center of the connecting rod half-shell 22 is consistent with the crank radius H of the crankshaft 20. There are inspection grooves on the main shaft half-shell 3 and the insert 13; the slot on the extension line of the axis 14 of the straight oil hole of the main shaft half-shell 3 is the entrance scale 4 of the straight oil hole 5 with an included angle of α1, and the slot on the extension line of the axis 14 of the straight oil hole of the insert 13 is the outlet scale 19 of the straight oil hole 5 with an included angle of α1, which is used to compare and test whether the α1 angle of the straight oil hole 5 is qualified; the slot on the extension line of the axis 15 of the straight oil hole of the main shaft half-shell 3 is the entrance scale 6 of the straight oil hole 5 with an included angle of α2, and the slot on the extension line of the axis 15 of the straight oil hole of the insert 13 is The outlet scale 18 of the straight oil hole 5 with an included angle of α2 is used for comparison and inspection to determine whether the α2 angle of the straight oil hole 5 is qualified. The inlet scale 7 of the straight oil hole 5 with an included angle of α3, which is slotted on the extension line of the straight oil hole axis 16 of the main shaft half-shell 3, and the outlet scale 17 of the straight oil hole 5 with an included angle of α3, which is slotted on the extension line of the straight oil hole axis 16 of the insert 13, are used for comparison and inspection to determine whether the α3 angle of the straight oil hole 5 is qualified. During inspection, the angle of the straight oil hole 5 is determined by comparing whether the corresponding scale is located in the middle of the orifice of the straight oil hole 5. By comparing the inspection scale on the main shaft half-shell 3 with the inlet position of the straight oil hole 5 on the corresponding main shaft journal, and by comparing the inspection scale on the insert 13 with the outlet position of the straight oil hole 5 on the corresponding main shaft journal, the angle of the straight oil hole 5 can be inspected to determine whether it is qualified.

[0024] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An integrated inspection fixture for inspecting multiple oil hole angles on a crankshaft, characterized by: A connecting rod half bushing (22) is provided on one side of the bracket (1), and a groove structure with a threaded through hole is provided on the other side of the bracket (1). The upper part of the main shaft half bushing (3) is connected to the groove of the bracket (1) through a bolt (2), and one end of the main shaft half bushing (3) is connected to the insert (13) through a bolt (12).

2. The integrated inspection tool for inspecting multiple oil hole angles of a crankshaft according to claim 1, characterized in that: The inner semicircular arc radius of the connecting rod half bushing (22) is slightly larger than the radius of the connecting rod journal (10) of the crankshaft (20); a groove (23) is provided in the middle of the front side of the connecting rod half bushing (22) at a position corresponding to the inclined oil hole (8); the vertical center line of the groove (23) coincides with the vertical center line of the inclined oil hole (8); the lower bottom edge of the groove (23) is located on the horizontal extension line of the center line of the orifice of the inclined oil hole (8); the lower bottom edge of the groove (23) is used as the inclined oil hole scale (9); during inspection, whether the angle of the inclined oil hole (8) is qualified is judged by comparing whether the inclined oil hole scale (9) is located in the middle position of the orifice of the inclined oil hole (8).

3. The integrated inspection tool for inspecting multiple oil hole angles of a crankshaft according to claim 1, characterized in that: The lower half of the main shaft half-shell (3) is a semicircular shell structure with an inner diameter slightly larger than the outer diameter of the main shaft journal (11) of the crankshaft (20); the upper half of the main shaft half-shell (3) is a boss structure with a through hole, and a gap is provided between the through hole on the boss structure and the bolt (2), so that the main shaft half-shell (3) is in a state of relative upward and downward movement relative to the bracket (1), and the boss structure is in a gap fit with the groove of the bracket (1); the insert (13) connected to the left side of the main shaft half-shell (3) can rotate freely around the connection point; during inspection, the insert (13) and the main shaft half-shell (3) jointly wrap the main shaft journal (11), and the distance from the center of the main shaft half-shell (3) to the center of the connecting rod half-shell (22) is consistent with the crank radius H of the crankshaft (20).

4. The integrated inspection tool for inspecting multiple oil hole angles of a crankshaft according to claim 2, characterized in that: The six straight oil holes (5) on the crankshaft (20) have three types of included angles, wherein the angle between the center line of the straight oil hole on the first axis (14) and the center line (21) of the adjacent connecting rod journal is α1; the angle between the center line of the straight oil hole on the second axis (15) and the center line (21) of the adjacent connecting rod journal is α2; and the angle between the center line of the straight oil hole on the third axis (16) and the center line (21) of the adjacent connecting rod journal is α3.

5. The integrated inspection tool for inspecting multiple oil hole angles of a crankshaft according to claim 1, characterized in that: The spindle half-shell (3) and the insert (13) are engraved with detection grooves; the slot on the extension line of the axis (14) of the straight oil hole of the spindle half-shell (3) is the entrance scale (4) of the straight oil hole (5) with an included angle of α1, and the slot on the extension line of the axis (14) of the straight oil hole of the insert (13) is the outlet scale (19) of the straight oil hole (5) with an included angle of α1; the slot on the extension line of the axis (15) of the straight oil hole of the spindle half-shell (3) is the entrance scale (6) of the straight oil hole (5) with an included angle of α2, and the slot on the extension line of the axis (15) of the straight oil hole of the insert (13) is the outlet scale (19) of the straight oil hole (5) with an included angle of α1. The slot on the extension line of the second hole axis (15) is the outlet scale second (18) of the straight oil hole (5) with an included angle of α2; the slot on the extension line of the third hole axis (16) of the main shaft half bushing (3) is the inlet scale third (7) of the straight oil hole (5) with an included angle of α3, and the slot on the extension line of the third hole axis (16) of the insert (13) is the outlet scale third (17) of the straight oil hole (5) with an included angle of α3; during inspection, whether the angle of the straight oil hole (5) is qualified is judged by comparing whether the scale is located in the middle position of the orifice of the straight oil hole (5).

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