A position gauge for oil hole of automobile engine connecting rod

Abstract

A kind of automobile engine connecting rod oil hole position degree gauge, belong to the technical field of automobile parts manufacturing.It includes workbench (4), two limit seats are arranged at the surface of workbench (4) with interval, the big head and small head of connecting rod (31) to be measured are installed at the limit seat of corresponding side respectively, detection mechanism is also arranged on the surface of workbench (4) and opposite to the side oil hole of connecting rod (31) to be measured, characterized by: a group of clamping components are arranged in the limit seat of two sides respectively and can be extended and retracted, two groups of clamping blocks of two sides are used to clamp the big head and small head of connecting rod (31) to be measured, clamping control component is arranged in the lower part of workbench (4), clamping control component extends to the clamping block in the limit seat of two sides respectively and controls two groups of clamping components to act synchronously simultaneously.By the automobile engine connecting rod oil hole position degree gauge, the two ends of connecting rod can be clamped simultaneously, and the detection efficiency is improved.

Description

Technical Field

[0001] A position gauge for connecting rod oil holes in automobile engines, belonging to the field of automobile parts manufacturing technology. Background Technology

[0002] As a crucial component of an engine, the connecting rod often has an oil hole at the connecting rod neck for lubrication to ensure optimal performance during engine operation. This allows for proper alignment and lubrication, guaranteeing the engine's ability to operate at high speeds. Therefore, the positional accuracy of this oil hole is a critical parameter that must be ensured during manufacturing.

[0003] In existing technologies, the positional accuracy of connecting rod oil holes is generally determined using a coordinate measuring machine (CMM). This method requires manual placement of the connecting rod onto the CMM. Because the oil holes in the connecting rod are very small, after using a large probe to measure the large and small holes and establish a reference plane, a smaller diameter bending probe needs to be used to measure the oil holes again. Therefore, this method is inefficient.

[0004] To improve testing efficiency, several technical solutions for detecting the position of connecting rod oil holes have emerged on the market. For example, the technical solution described in Chinese utility model patent application number 201822214860.1 (application date December 28, 2018) entitled "Connecting Rod Oil Hole Position Inspector," and application number 201810983885.X (application date August 16, 2018) entitled "A Method for Detecting the Position of Oil Holes in Crankshaft Main Journals and Connecting Rod Journals," are also available. The technical solutions described in the Chinese invention patent for "inspection tool", the Chinese utility model patent for "connecting rod big end oil hole angle and position inspection tool" with application number 201520945064.9 and application date November 23, 2015, and the Chinese invention patent for "an oil hole position inspection tool" with application number 202223019268.9 and application date November 14, 2022, and the Chinese invention patent for "an oil hole position inspection tool" are described in the same patent.

[0005] However, existing technologies, including the aforementioned solutions, generally suffer from the following drawbacks: To ensure the accuracy of the test results, it is crucial to temporarily fix the connecting rod before testing to guarantee its position. Therefore, existing solutions typically employ limiting devices. However, since the connecting rod is a component of a certain length, both ends of the connecting rod need to be limited separately, making the operation cumbersome. Simultaneously, the applicant of this application aims to design a novel oil hole position detection scheme to achieve accurate detection of oil hole position. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a position gauge for the oil hole of the connecting rod of an automobile engine that can simultaneously clamp both ends of the connecting rod and improve the detection efficiency.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: the position measurement tool for the connecting rod oil hole of an automobile engine includes a worktable, two limiting seats are arranged at intervals on the surface of the worktable, the large head and small head of the connecting rod to be tested are respectively installed at the limiting seats on the corresponding sides, and a detection mechanism facing the oil hole on the side of the connecting rod to be tested is also provided on the surface of the worktable. The feature is that a set of clamping components is telescopically arranged in the limiting seats on both sides, and the two sets of clamping blocks on both sides are used to clamp the large head and small head of the connecting rod to be tested, respectively. A clamping control component is provided at the lower part of the worktable, and the clamping control component extends to the clamping blocks in the limiting seats on both sides, and simultaneously controls the two sets of clamping components to move synchronously.

[0008] Preferably, multiple sliding grooves are horizontally arranged around each limiting seat, and the clamping assembly includes multiple clamping blocks, which are slidably disposed in the corresponding sliding grooves. The inner ends of all clamping blocks are equidistant from the center line of the limiting seat, and a locking pin is provided at the center line of the limiting seat that can be raised and lowered. The upper part of the locking pin contacts the inner ends of all clamping blocks.

[0009] Preferably, an opening is provided in the middle of each clamping block, a limit shaft is fixed in the opening, and a horizontal elastic element is provided in the opening of each clamping block. The horizontal elastic element is located inside the corresponding limit shaft and drives the inner end of the clamping block to approach the locking pin.

[0010] Preferably, a linkage plate is provided at the bottom of the worktable, the linkage plate extends horizontally to the bottom of the two side limit seats, and the locking pins in the two side limit seats extend to the linkage plate and are connected to the linkage plate respectively.

[0011] Preferably, vertical elastic elements are provided at the locking pins in the two limiting seats on both sides. The vertical elastic elements contact the locking pins on the corresponding sides and push the corresponding locking pins close to the clamping blocks above them.

[0012] Preferably, a cam for driving the linkage plate to rise and fall is provided on the upper part of the linkage plate, and the cam is rotatably located on the upper part of the linkage plate.

[0013] Preferably, at least one of the two limiting seats is slidably mounted on the surface of the worktable along the line connecting the two limiting seats.

[0014] Preferably, the detection mechanism includes a detection base fixed to the surface of the workbench, a horizontally movable detection push rod is provided inside the detection base, and a detection head facing the oil hole is provided at the end of the detection push rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The position gauge for the connecting rod oil hole of this automobile engine can simultaneously clamp both ends of the connecting rod, improving inspection efficiency.

[0017] At least one of the limit seats arranged on the worktable surface can be translated, thus making it suitable for the inspection of connecting rods of different sizes.

[0018] By setting a support on the worktable surface to support the connecting rod, the connecting rod is ensured to be in a horizontal state during testing, thus improving the testing accuracy. Attached Figure Description

[0019] Figures 1-2 Axonometric drawing of the position measurement tool for the connecting rod oil hole of an automobile engine.

[0020] Figure 3 This is a front view of a tool for measuring the position of the connecting rod oil hole in an automobile engine.

[0021] Figure 4 for Figure 3 A bottom view.

[0022] Figure 5 for Figure 3 Top view.

[0023] Figure 6 for Figure 3 Enlarged cross-sectional view along the AA direction.

[0024] Figure 7 for Figure 3 Enlarged cross-sectional view along the BB direction.

[0025] Figure 8 A top view showing the use of a tool to check the position of the connecting rod oil hole in an automobile engine.

[0026] The components are as follows: 1. Large end limit seat; 2. Guide frame; 3. Translation plate; 4. Worktable; 5. Bearing seat; 6. Small end limit seat; 7. Detection head; 8. Detection base; 9. Detection push rod; 10. Small end clamping block; 11. Fixing plate; 12. Handle; 13. Large end clamping block; 14. Support column; 15. Small end baffle; 16. Small end locking pin; 17. Linkage plate; 18. Cam; 19. Clamping shaft; 20. Large end baffle; 21. Large end locking pin; 22. Linkage plate slide groove; 23. Clamping block spring; 24. Large end cover plate; 25. Limiting shaft; 26. Large end base; 27. Lifting and resetting spring; 28. Worktable slide groove; 29. ​​Small end cover plate; 30. Small end base; 31. Connecting rod to be tested. Detailed Implementation

[0027] Figures 1-8This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-8 The present invention will be further described below.

[0028] like Figures 1-5 As shown, a position gauge for connecting rod oil holes in an automobile engine (hereinafter referred to as the gauge) includes a worktable 4, which is a horizontally arranged plate-shaped component. Support columns 14 for supporting the worktable 4 are respectively provided at the four corners of the bottom of the worktable 4.

[0029] A large-end limit seat 1 and a small-end limit seat 6 are spaced apart on the surface of the worktable 4, with the small-end limit seat 6 fixed to the surface of the working head. A guide frame 2 is provided around the outer ring of the large-end limit seat 1, and a translation plate 3 is slidably arranged inside the guide frame 2. The translation plate 3 reciprocates within the guide frame 2, and the large-end limit seat 1 is fixed to the surface of the translation plate 3 and reciprocates with the translation plate 3 on the surface of the worktable 4. By adjusting the distance between the large-end limit seat 1 and the small-end limit seat 6, this inspection tool can be adapted to inspect connecting rods of different sizes.

[0030] Multiple large-end clamping blocks 13 are evenly arranged around the periphery of the large-end limiting seat 1, and multiple small-end clamping blocks 10 are evenly arranged around the periphery of the small-end limiting seat 6. A clamping control assembly is also provided at the lower part of the worktable 4 to simultaneously control the clamping state of the large-end clamping blocks 13 and the small-end clamping blocks 10. During testing, the connecting rod 31 to be tested (see...) Figure 8 The large end of the rod to be tested is fitted outside the large end limit seat 1, and the small end of the rod to be tested 31 is fitted outside the small end limit seat 6.

[0031] A bearing seat 5 is also provided on the side of the small end limit seat 6 near the large end limit seat 1. The bearing seat 5 is fixed on the surface of the workbench 4. After the connecting rod 31 to be tested is assembled with the large end limit seat 1 and the small end limit seat 6, the small end of the connecting rod 31 to be tested is supported by the bearing seat 5, so that the connecting rod 31 to be tested is in a horizontal state after being assembled with the large end limit seat 1 and the small end limit seat 6.

[0032] After the connecting rod 31 to be tested is assembled with the large end limit seat 1 and the small end limit seat 6, the large end clamping block 13 and the small end clamping block 10 are clamped by the clamping control component to clamp the large end and the small end of the connecting rod 31 to be tested, respectively. Then, the oil hole position of the connecting rod 31 to be tested is detected by the detection mechanism arranged at the small end limit seat 6.

[0033] The testing mechanism includes a testing base 8 fixed to the surface of the workbench 4. A testing push rod 9 is horizontally arranged inside the testing base 8, passing through the testing base 8 and reciprocating within it. A testing head 7 is provided at the end of the testing push rod 9 facing the small end limit seat 6. After the connecting rod 31 to be tested is clamped and fixed to the surface of the workbench 4 as described above, the testing push rod 9 is pushed. When the testing head 7 can smoothly enter the oil hole of the small end of the connecting rod 31 to be tested, it indicates that the position of the oil hole meets the requirements.

[0034] The clamping control assembly includes a linkage plate 17 horizontally positioned at the bottom of the worktable 4. The linkage plate 17 is arranged along the length of the worktable 4 at the bottom of the worktable 4. A large-end locking pin 21 and a small-end locking pin 16 are respectively installed on both sides of the linkage plate 17. The large-end locking pin 21 passes upward through the worktable 4 and enters the interior of the large-end limiting seat 1, while the small-end locking pin 16 passes upward through the worktable 4 and enters the interior of the small-end limiting seat 6.

[0035] A sliding groove 22 is provided on the linkage plate 17 at the position corresponding to the large-end locking pin 21, and a through hole is provided on the linkage plate 17 at the position corresponding to the small-end locking pin 16. A large-end baffle 20 is provided at the bottom of the large-end locking pin 21, and a small-end baffle 15 is provided at the bottom of the small-end locking pin 16. After the bottom of the large-end locking pin 21 passes through the sliding groove 22 and the bottom of the small-end locking pin 16 passes through the corresponding through hole, the large-end baffle 20 and the small-end baffle 15 are together locked in the lower part of the linkage plate 17.

[0036] Two fixing plates 11 are fixed at intervals on the lower surface of the worktable 4, and the two fixing plates 11 are arranged at intervals along the width direction of the worktable 4 in the middle of the lower surface of the worktable 4. A clamping shaft 19 is rotatably mounted between the two fixing plates 11, and the clamping shaft 19 is perpendicular to the linkage plate 17. One end of the clamping shaft 19 extends from the middle of the fixing plate 11 on the corresponding side and is fitted with a handle 12. Rotating the handle 12 drives the clamping shaft 19 to rotate. A cam 18 is mounted in the middle of the clamping shaft 19, and the cam 18 contacts the linkage plate 17.

[0037] like Figure 6 As shown, the large-head limiting seat 1 includes a large-head base 26 and a large-head cover plate 24 fixed on the top of the large-head base 26. The bottom of the large-head base 26 passes through the center of the translation plate 3 and is fixed by multiple bolts. The bottom of the large-head base 26 is flush with the bottom of the translation plate 3. The edge of the translation plate 3 is stuck on both sides of the guide frame 2. The guide frame 2 guides and limits the translation plate 3.

[0038] Multiple radial grooves are formed on the top of the large-head base 26, and the large-head clamping block 13 is arranged in each groove and slides along the corresponding groove. A through hole is formed in the middle of each large-head clamping block 13, and a limiting shaft 25 is installed in each through hole. The bottom of the limiting shaft 25 is inserted into the large-head base 26. A clamping block spring 23 is also provided in the through hole in the middle of the large-head clamping block 13, and the clamping block spring 23 is located inside the limiting shaft 25. When the clamping block spring 23 is not subjected to external force, the clamping block spring 23 pushes the large-head clamping block 13 into the groove through its own elastic force, so that the large-head clamping block 13 is located entirely in the corresponding groove. After the large-head clamping block 13, the limiting shaft 25 and the clamping block spring 23 are arranged, the large-head cover plate 24 is used to seal the slide groove at the top of the large-head base 26, thereby restricting the large-head clamping block 13 and the clamping block spring 23 within the corresponding slide groove.

[0039] A long, narrow worktable groove 28, corresponding to the linkage plate groove 22, is provided on the surface of the worktable 4. The large-end locking pin 21 passes upward through the worktable 4 and enters the interior of the large-end limiting seat 1. The top of the large-end locking pin 21 extends to the large-end clamping block 13. The top of the large-end locking pin 21 is frustum-shaped, and the contact surface between the large-end clamping block 13 and the top of the large-end locking pin 21 is an inclined surface with the same angle.

[0040] The large-head locking pin 21 has a two-section structure, thicker at the top and thinner at the bottom. An upper boss is formed at the junction of the thicker and thinner sections, and a lower boss is formed at the bottom of the worktable slide groove 28. A lifting and returning spring 27 is fitted outside the thinner section of the large-head locking pin 21. The upper and lower ends of the lifting and returning spring 27 contact the upper and lower bosses, respectively. When the lifting and returning spring 27 is not subjected to external force, the large-head locking pin 21 is in its uppermost position under the elastic force of the lifting and returning spring 27. At this time, the large-head locking pin 21 pushes all the large-head clamping blocks 13 in contact with it outward through the conical structure at its top. The ends of the large-head clamping blocks 13 protrude from the surface of the large-head base 26. When the large-head locking pin 21 descends against the lifting and returning spring 27 and its top separates from the large-head clamping blocks 13, the clamping block spring 23 pushes the large-head clamping blocks 13 inward into the slide groove, so that the large-head clamping blocks 13 are located entirely in the corresponding slide groove.

[0041] A boss is formed on the upper part of the large head base 26. After the large head of the connecting rod 31 to be tested is fitted onto the outside of it, the large head of the connecting rod 31 to be tested is supported by the boss on the upper part. Together with the bearing seat 5, the connecting rod 31 to be tested is kept in a horizontal state.

[0042] like Figure 7As shown, the small-end limiting seat 6 includes a small-end base 30, the bottom of which is fixedly inserted into the surface of the worktable 4. A small-end cover plate 29 is fixed to the top of the small-end base 30. Multiple radial grooves are formed on the top of the small-end base 30, and small-end clamping blocks 10 are arranged in each groove and slide along the corresponding groove. A through hole is formed in the middle of each small-end clamping block 10, and a limiting shaft 25 is installed in each through hole. The bottom of the limiting shaft 25 is inserted into the small-end base 30. A clamping block spring 23 is also provided in the through hole in the middle of each small-end clamping block 10, located inside the limiting shaft 25. When the clamping block spring 23 is not subjected to external force, it pushes the small-end clamping block 10 into the groove through its own elastic force, so that the small-end clamping block 10 is entirely located in the corresponding groove. After the small-end clamping block 10, the limiting shaft 25 and the clamping block spring 23 are arranged, the small-end cover plate 29 is used to seal the slide groove at the top of the small-end base 30, thereby restricting the small-end clamping block 10 and the clamping block spring 23 within the corresponding slide groove.

[0043] A long, narrow worktable groove 28, corresponding to the sliding groove 22 of the linkage plate, is provided on the surface of the worktable 4. The small-end locking pin 16 passes upward through the worktable 4 and enters the interior of the small-end limiting seat 6. The top of the small-end locking pin 16 extends to the small-end clamping block 10. The top of the small-end locking pin 16 is frustum-shaped, and the contact surface between the top of the small-end clamping block 10 and the top of the small-end locking pin 16 is an inclined surface with the same angle.

[0044] The small-end locking pin 16 has a two-section structure, thicker at the top and thinner at the bottom. An upper boss is formed at the junction of the thicker and thinner sections, and a lower boss is formed at the bottom of the worktable slide groove 28. A lifting and returning spring 27 is fitted around the thinner section of the small-end locking pin 16, with its upper and lower ends contacting the upper and lower bosses, respectively. When the lifting and returning spring 27 is not subjected to external force, the small-end locking pin 16 is in its uppermost position under the elastic force of the lifting and returning spring 27. At this time, the small-end locking pin 16 pushes all the small-end clamping blocks 10 in contact with it outward through the tapered structure at its top. The ends of the small-end clamping blocks 10 protrude from the surface of the small-end base 30. When the small-end locking pin 16 descends against the lifting and returning spring 27 and its top separates from the small-end clamping blocks 10, the clamping block spring 23 pushes the small-end clamping blocks 10 inward into the slide groove, so that the entire small-end clamping block 10 is located in the corresponding slide groove.

[0045] The specific working process and working principle are as follows:

[0046] like Figure 8As shown, the position of the large-end limit seat 1 is adjusted according to the length of the connecting rod 31 to be tested. When the large-end limit seat 1 is translated, the sliding groove 22 of the linkage plate and the sliding groove 28 of the worktable provide sliding space for the large-end locking pin 21 that passes through the large-end limit seat 1 and the worktable 4. Then, by rotating the handle 12, the clamping shaft 19 is rotated so that the maximum diameter of the cam 18 contacts the linkage plate 17. The cam 18 drives the linkage plate 17 to descend to the lowest end. At the same time as the linkage plate 17 descends, the small-end baffle 15 and the large-end baffle 20 drive the small-end locking pin 16 and the large-end locking pin 21.

[0047] When the small-end locking pin 16 and the large-end locking pin 21 descend to their lowest positions, their tops separate from the small-end clamping block 10 and the large-end clamping block 13, respectively. The small-end clamping block 10 and the large-end clamping block 13 retract into their respective slides under the action of their respective clamping block springs 23. At this time, the lifting reset spring 27 and the clamping block spring 23 are both in a compressed state.

[0048] Then, the large head and small head of the connecting rod 31 to be tested are respectively fitted onto the outside of the large head base 26 and the small head base 30. The connecting rod 31 to be tested is kept in a horizontal state by the boss on the upper part of the large head base 26 and the bearing seat 5, and the connecting rod 31 to be tested is installed.

[0049] Reverse rotation of handle 12 drives clamping shaft 19 to rotate, causing the maximum diameter of cam 18 to separate from linkage plate 17. At this time, small-end locking pin 16 and large-end locking pin 21 rise to the highest position under the elastic force of their respective lifting and returning springs 27. Simultaneously, small-end locking pin 16 and large-end locking pin 21 push small-end clamping block 10 and large-end clamping block 13 radially outward through their top conical structures, locking the inner ring of the large head and the inner ring of the small head of the connecting rod 31 to be tested, thus fixing the connecting rod 31 to be tested. At this time, linkage plate 17 also rises to the highest position under the drive of small-end baffle 15 and large-end baffle 20.

[0050] After clamping and fixing the connecting rod 31 to be tested onto the surface of the worktable 4 as described above, push the detection push rod 9. When the detection head 7 can smoothly enter the oil hole of the small head of the connecting rod 31 to be tested, it indicates that the position of the oil hole of the small head of the connecting rod 31 to be tested meets the requirements.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A position gauge for connecting rod oil holes in an automobile engine, comprising a worktable (4), with two limiting seats spaced apart on the surface of the worktable (4), the large head and small head of the connecting rod (31) to be tested respectively mounted on the limiting seats on the corresponding sides, and a detection mechanism facing the oil hole on the side of the connecting rod (31) to be tested also provided on the surface of the worktable (4), characterized in that: A set of clamping components is telescopically installed in the limit seats on both sides. The two sets of clamping blocks on both sides are used to clamp the large head and small head of the connecting rod (31) to be tested. A clamping control component is installed at the bottom of the worktable (4). The clamping control component extends to the clamping blocks in the limit seats on both sides and controls the two sets of clamping components to move synchronously.

2. The position gauge for the connecting rod oil hole of an automobile engine according to claim 1, characterized in that: Multiple sliding grooves are horizontally arranged around each limiting seat. The clamping assembly includes multiple clamping blocks, which are slidably disposed in their respective sliding grooves. The inner ends of all clamping blocks are equidistant from the center line of the limiting seat. A locking pin is provided at the center line of the limiting seat, and the upper part of the locking pin contacts the inner ends of all clamping blocks.

3. The position gauge for the connecting rod oil hole of an automobile engine according to claim 2, characterized in that: An opening is provided in the middle of each clamping block, and a limiting shaft (25) is fixed in the opening. A horizontal elastic element is provided in the opening of each clamping block. The horizontal elastic element is located inside the corresponding limiting shaft (25) and drives the inner end of the clamping block to approach the locking pin.

4. The position gauge for the connecting rod oil hole of an automobile engine according to claim 1, characterized in that: A linkage plate (17) is provided at the bottom of the workbench (4). The linkage plate (17) extends horizontally to the bottom of the two side limit seats. The locking pins in the two side limit seats extend to the linkage plate (17) and are connected to the linkage plate (17) respectively.

5. The position gauge for the connecting rod oil hole of an automobile engine according to claim 4, characterized in that: Vertical elastic elements are provided at the locking pins in the limiting seats on both sides. The vertical elastic elements contact the locking pins on the corresponding sides and push the corresponding locking pins close to the clamping blocks above them.

6. The position gauge for the connecting rod oil hole of an automobile engine according to claim 4, characterized in that: A cam (18) for driving the linkage plate (17) to rise and fall is provided on the upper part of the linkage plate (17). The cam (18) is rotatably located on the upper part of the linkage plate (17).

7. The position gauge for the connecting rod oil hole of an automobile engine according to claim 1, characterized in that: At least one of the two limit seats is slidably mounted on the surface of the worktable (4) along the line connecting the two limit seats.

8. The position gauge for the connecting rod oil hole of an automobile engine according to claim 1, characterized in that: The testing mechanism includes a testing base (8) fixed on the surface of the workbench (4), a horizontally movable testing push rod (9) is provided in the testing base (8), and a testing head (7) facing the oil hole is provided at the end of the testing push rod (9).

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