A crankshaft hole center alignment tool and alignment method

Abstract

The present invention relates to a tool for aligning the center of a crankshaft hole of an engine cylinder block, comprising a base, a left connecting seat and a right connecting seat are respectively arranged on both sides of the base, floating support assemblies are respectively arranged on the left connecting seat and the right connecting seat, and the floating support assemblies on both sides jointly support a standard detection core rod; a method for aligning the center of a crankshaft hole of an engine cylinder block, comprising the following steps: a first step, firstly making the floating support assemblies at both ends in a semi-loose state with the left connecting seat and the right connecting seat respectively, so that they can slide slightly, and then using a support screw to press the T-shaped support block to the lowest point. A second step, passing the standard detection core rod through the cylinder block and the cylinder block clamp assembly. A third step, making the T-shaped support block resume rising under the action of the elastic plunger, so that the movable support block contacts the standard detection core rod. The present invention can safely, reliably, quickly and conveniently find the center of the crankshaft hole of the engine cylinder block, and is convenient for measurement and verification, thereby improving the debugging efficiency and shortening the debugging time.

Description

Technical Field

[0001] The invention relates to a crankshaft hole center alignment tool and an alignment method, belonging to the technical field of engine cylinder crankshaft hole honing. Background Art

[0002] At present, the method for aligning the honing position of the crankshaft hole of the engine cylinder block is to use the honing tool guide part to enter the first gear of the crankshaft hole of the engine cylinder block (there are a total of engine cylinder holes + 1 gear), and use a feeler gauge to measure the clearance between the honing tool and the first gear crankshaft hole up and down, left and right to adjust the position relationship between the honing tool and the crankshaft hole. This method has limitations. The first gear position relationship of the crankshaft hole cannot truly reflect the position relationship between the entire crankshaft hole and the honing tool. It is also necessary to correct the position relationship between the entire crankshaft hole and the honing tool based on the honed crankshaft hole detection data to ensure that the honing size is qualified. This method of adjustment is difficult, prone to tool collision, requires high operator experience, takes a long time to adjust, requires a large number of debugging parts for verification, and is costly. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a crankshaft hole center alignment tool and alignment method, which can safely and reliably, quickly and conveniently locate the center of the crankshaft hole of the engine cylinder block, and facilitate measurement and verification, thereby improving debugging efficiency, shortening debugging time, and reducing debugging costs.

[0004] According to the technical solution provided by the present invention: an engine cylinder crankshaft hole center alignment tool comprises a base, a left connecting seat and a right connecting seat are respectively arranged on both sides of the base, a floating support assembly is respectively arranged on the left connecting seat and the right connecting seat, and the floating support assemblies on both sides jointly support a standard detection core rod;

[0005] The floating support assembly includes a base, a bottom cover plate is arranged at the bottom end of the base, a through slide groove is opened at the bottom of the base, and a wedge-shaped slider is arranged in the slide groove; a front limit cover plate and a rear cover plate are arranged at both ends of the slide groove of the base, a handle is screwed on the front limit cover plate, and the inner end of the handle is connected to the wedge-shaped slider, and the wedge-shaped slider can be driven to move forward and backward by rotating the handle;

[0006] The base is provided with a T-slot on the top and a sliding hole on the bottom, and the T-slot and the sliding hole are connected up and down; limit cover plates are installed on both sides of the T-slot, and a T-shaped support block for supporting the standard detection core rod is slidably arranged in the space formed between the T-slot and the limit cover plates on both sides; support head screws are screwed on the bases on both sides of the T-shaped support block, and the bottom ends of the support head screws abut against the T-shaped support block, and the position of the T-shaped support block sliding up and down can be adjusted by rotating the support head screws; a T-shaped column is slidably arranged in the sliding hole, the upper end of the T-shaped column abuts against the T-shaped support block, and the lower end of the T-shaped column abuts against the wedge-shaped slider, and the wedge-shaped slider can adjust the up and down movement of the T-shaped column by sliding back and forth; elastic plungers are fixedly arranged on the bases on both sides of the T-shaped column, and the top ends of the elastic plungers abut against the T-shaped column to provide an upward restoring force.

[0007] Furthermore, the upper and lower ends of the T-shaped column are ball heads.

[0008] Furthermore, the T-shaped support block includes a limit block and a movable support block, the limit block is fixed at the bottom of the movable support block and protrudes at both ends; and a V-shaped positioning portion is provided at the supporting end of the movable support block.

[0009] A method for aligning the center of a crankshaft hole of an engine cylinder block comprises the following steps:

[0010] The first step is to semi-loosen the floating support components at both ends from the left and right connecting seats respectively, so that they can slide slightly, and then press the T-shaped support block to the lowest point with the support screws.

[0011] The second step is to pass the standard test core rod through the cylinder body and the cylinder body fixture assembly.

[0012] The third step is to loosen the pin screw to allow the T-shaped support block to rise again under the action of the elastic plunger, so that the movable support block contacts the standard test core rod.

[0013] The fourth step is to ensure that the T-shaped support blocks at both ends are in effective contact with the standard test core rod, first lock the floating support assembly with the left connecting seat and the right connecting seat respectively, then lock the handle, and finally tighten the support head screw. At this time, the T-shaped support blocks at both ends are fixed.

[0014] Step 5. Pull out the standard test core rod and remove the cylinder from the cylinder fixture.

[0015] The sixth step is to place the standard test mandrel on the fixed T-shaped support blocks at both ends. The center of the engine cylinder crankshaft hole is transferred to the center of the standard test mandrel, and the detection of the center of the standard mandrel is convenient and easy to implement.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. It can actually reflect the center position of the entire crankshaft hole, which is consistent with the required reference principle and has a small center conversion error.

[0018] 2. During the measurement process, the core rod is unobstructed, which is convenient for measurement and has high visibility.

[0019] 3. During the measurement process, there is no need for tools or personnel to touch the measuring part, which is safe and reliable.

[0020] 4. Can detect the parallelism and positional relationship between the center and the tool center.

[0021] 5. The measurement results can be quantified to facilitate the adjustment of positional relationships.

[0022] 6. The center-aligning tooling is modular, with a stable structure and strong operability.

[0023] 7. The correct method is simple to operate, easy to teach and learn, and suitable for promotion.

[0024] 8. It can improve debugging efficiency, shorten debugging time and reduce debugging costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a usage state diagram of the present invention.

[0026] Figure 2 It is a cross-sectional view of the floating support assembly of the present invention.

[0027] Figure 3 for Figure 2 AA view of the .

[0028] Explanation of the accompanying drawings: 1-base, 2-left connecting seat, 3-floating support assembly, 4-standard detection core rod, 5-cylinder body and cylinder body clamp assembly, 6-right connecting seat, 7-rear cover plate, 8-base, 9-bottom cover plate, 10-elastic plunger, 11-limiting block, 12-support head screw, 13-movable support block, 14-T-shaped column, 15-wedge-shaped slider, 16-front end limiting cover plate, 17-handle, 18-limiting cover plate, 19-T-shaped support block, 20-slide groove, 21-V-shaped positioning part. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the specific drawings.

[0030] like Figure 1 As shown, a tool for aligning the center of a crankshaft hole of an engine cylinder block comprises a base 1, a left connecting seat 2 and a right connecting seat 6 are respectively arranged on both sides of the base 1, floating support assemblies 3 are respectively arranged on the left connecting seat 2 and the right connecting seat 6, and the floating support assemblies 3 on both sides jointly support a standard detection core rod 4;

[0031] like Figure 2and Figure 3 As shown, the floating support assembly 3 includes a base 8, a bottom cover plate 9 is arranged at the bottom end of the base 8, a through slide groove 20 is opened at the bottom of the base 8, and a wedge-shaped slider 15 is arranged in the slide groove 20; a front end limit cover plate 16 and a rear cover plate 7 are arranged at both ends of the slide groove 20 of the base 8, a handle 17 is screwed on the front end limit cover plate 16, and the inner end of the handle 17 is connected to the wedge-shaped slider 15, and the wedge-shaped slider 15 can be driven to move forward and backward by rotating the handle 17;

[0032] The base 8 is provided with a T-slot at the top and a sliding hole at the bottom, and the T-slot and the sliding hole are connected vertically; limiting cover plates 18 are installed on both sides of the T-slot, and a T-shaped support block 19 for supporting the standard detection core rod 4 is slidably arranged in the space formed between the T-slot and the limiting cover plates 18 on both sides; support head screws 12 are screwed on the base 8 on both sides of the T-shaped support block 19, and the bottom end of the support head screw 12 abuts against the T-shaped support block 19, and the position of the T-shaped support block 19 sliding up and down can be adjusted by rotating the support head screw 12; a T-shaped column 14 is slidably arranged in the sliding hole, the upper end of the T-shaped column 14 abuts against the T-shaped support block 19, and the lower end of the T-shaped column 14 abuts against the wedge-shaped slider 15, and the wedge-shaped slider 15 can adjust the up and down movement of the T-shaped column 14 by sliding back and forth; elastic plungers 10 are fixedly arranged on the base 8 on both sides of the T-shaped column 14, and the top end of the elastic plunger 10 abuts against the T-shaped column 14 to provide an upward restoring force.

[0033] The upper and lower ends of the T-shaped column 14 are ball heads.

[0034] The T-shaped support block 19 includes a limit block 11 and a movable support block 13 . The limit block 11 is fixed to the bottom of the movable support block 13 and extends beyond the two ends. A V-shaped positioning portion 21 is provided at the supporting end of the movable support block 13 .

[0035] like Figure 1 As shown, a method for aligning the center of a crankshaft hole of an engine cylinder block comprises the following steps:

[0036] The first step is to make the floating support components 3 at both ends semi-loose from the left connecting seat 2 and the right connecting seat 6 respectively, so that they can slide slightly, and then use the support screw 12 to press the T-shaped support block 19 to the lowest point.

[0037] The second step is to pass the standard testing core rod 4 through the cylinder body and the cylinder body clamp assembly 5.

[0038] The third step is to loosen the screw 12 to allow the T-shaped support block 19 to resume its upward movement under the action of the elastic plunger 10 , so that the movable support block 13 contacts the standard detection core rod 4 .

[0039] The fourth step is to ensure that the T-shaped support blocks 19 at both ends are in effective contact with the standard detection core rod 4, first lock the floating support assembly 3 with the left connecting seat 2 and the right connecting seat 6 respectively, then lock the handle 17, and finally tighten the support head screw 12. At this time, the T-shaped support blocks 19 at both ends are fixed.

[0040] The fifth step is to pull out the standard testing core rod 4 and remove the cylinder body from the cylinder body fixture.

[0041] The sixth step is to place the standard detection mandrel 4 on the fixed T-shaped support blocks 19 at both ends, and the center of the engine cylinder crankshaft hole is transferred to the center of the standard detection mandrel 4, so that the detection of the center of the standard mandrel 4 is convenient and easy to implement.

[0042] At present, in the field of engine block crankshaft hole honing, the position of the crankshaft hole is to use the honing tool guide part to enter the first gear of the engine block crankshaft hole (there are a total of engine cylinder holes + 1 gear), and use a feeler gauge to measure the clearance between the honing tool and the first gear crankshaft hole up and down, left and right to adjust the position relationship between the honing tool and the crankshaft hole. This method is not only limited, but also has no adjustment data. It requires repeated tests and adjustments based on operating experience. Measuring the first gear position relationship of the crankshaft hole cannot truly reflect the position relationship between the entire crankshaft hole and the honing tool. In the later stage, it is necessary to correct the position relationship between the crankshaft hole and the honing tool according to the honed crankshaft hole detection data to ensure that the honing size is qualified. This adjustment method is difficult, prone to tool collision, requires high operator experience, takes a long time to adjust, requires a large number of debugging parts for verification, and has high development costs.

[0043] The present invention can actually reflect the center position of the entire crankshaft hole, and there is a theoretical basis for converting the crankshaft hole center to the core rod center with small error; during the measurement process, the core rod is unobstructed, the measurement is convenient, and the visibility is high; during the measurement process, there is no need for tools and personnel to contact the measuring part, which is safe and reliable; at the same time, it is capable of detecting the parallelism and positional relationship between the crankshaft hole center and the tool center; the measurement result can be specifically quantified and convenient to adjust; the tooling is modular, the structure is stable, and the operability is strong; the alignment method is simple to operate and easy to teach and learn; the debugging efficiency is high, the debugging time is shortened, and the debugging cost is reduced.

[0044] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A tool for aligning the center of a crankshaft hole in an engine cylinder block, characterized in that: It comprises a base (1), a left connecting seat (2) and a right connecting seat (6) are respectively arranged on two sides of the base (1), floating support assemblies (3) are respectively arranged on the left connecting seat (2) and the right connecting seat (6), and the floating support assemblies (3) on both sides jointly support a standard detection core rod (4); The floating support assembly (3) comprises a base (8), a bottom cover plate (9) is arranged at the bottom end of the base (8), a through slide groove (20) is opened at the bottom of the base (8), and a wedge-shaped slider (15) is arranged in the slide groove (20); a front end limit cover plate (16) and a rear cover plate (7) are arranged at both ends of the slide groove (20) of the base (8), a handle (17) is screwed on the front end limit cover plate (16), and the inner end of the handle (17) is connected to the wedge-shaped slider (15), and the wedge-shaped slider (15) can be driven to move forward and backward by rotating the handle (17); The base (8) has a T-shaped slot on the top and a sliding hole on the bottom, and the T-shaped slot and the sliding hole are connected vertically; limit cover plates (18) are installed on both sides of the T-shaped slot, and a T-shaped support block (19) for supporting the standard detection core rod (4) is slidably arranged in the space formed between the T-shaped slot and the limit cover plates (18) on both sides; support screws (12) are screwed on the base (8) on both sides of the T-shaped support block (19), and the bottom end of the support screw (12) is against the T-shaped support block (19), and the support screw (12) can be rotated to The position of the T-shaped support block (19) can be adjusted to slide up and down; a T-shaped column (14) is slidably arranged in the sliding hole, the upper end of the T-shaped column (14) abuts against the T-shaped support block (19), and the lower end of the T-shaped column (14) abuts against the wedge-shaped slider (15), and the wedge-shaped slider (15) can adjust the up and down movement of the T-shaped column (14) by sliding forward and backward; elastic plungers (10) are fixedly arranged on the bases (8) on both sides of the T-shaped column (14), and the top end of the elastic plunger (10) abuts against the T-shaped column (14) to provide an upward restoring force; The upper and lower ends of the T-shaped column (14) are ball heads; The T-shaped support block (19) comprises a limit block (11) and a movable support block (13); the limit block (11) is fixed to the bottom of the movable support block (13) and protrudes at both ends; and a V-shaped positioning portion (21) is provided at the supporting end of the movable support block (13).

2. The method for aligning the center of the crankshaft hole of an engine cylinder block according to claim 1, characterized in that: The following steps are involved: The first step is to make the floating support components (3) at both ends semi-loose from the left connecting seat (2) and the right connecting seat (6) respectively, so that they can slide slightly, and then use the support screw (12) to press the T-shaped support block (19) to the lowest point; Step 2: Pass the standard test core rod (4) through the cylinder body and the cylinder body fixture assembly (5); The third step is to loosen the pin screw (12) so that the T-shaped support block (19) can be raised again under the action of the elastic plunger (10) so that the movable support block (13) can be brought into contact with the standard detection core rod (4); Step 4: After ensuring that the T-shaped support blocks (19) at both ends are in effective contact with the standard test core rod (4), first lock the floating support assembly (3) with the left connecting seat (2) and the right connecting seat (6), then lock the handle (17), and finally tighten the support head screw (12). At this time, the T-shaped support blocks (19) at both ends are fixed; Step 5: Pull out the standard test core rod (4) and remove the cylinder from the cylinder fixture; The sixth step is to place the standard testing mandrel (4) on the fixed two end T-shaped support blocks (19), so that the center of the engine cylinder crankshaft hole is transferred to the center of the standard testing mandrel (4), and the center of the standard testing mandrel 4 is conveniently and easily implemented.

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