CN216846047U

CN216846047U - Camshaft positioning key groove symmetry degree checking fixture

Info

Publication number: CN216846047U
Application number: CN202220192711.3U
Authority: CN
Inventors: 刘安龙; 张昊; 陈军
Original assignee: Chengdu Jinding Precision Casting Co ltd
Current assignee: Chengdu Jinding Precision Casting Co ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-06-28
Anticipated expiration: 2032-01-24

Abstract

The utility model discloses a camshaft positioning key groove symmetry degree checking fixture, which comprises a bottom plate, wherein a first base and a second base are arranged on the bottom plate, a first top is movably arranged on the first base, a second top and a fixing frame are fixedly arranged on the second base, gaps between the first top and the second top are oppositely arranged, a positioning tool is movably arranged on the fixing frame, a positioning plane at the top of the positioning tool is attached to a reference surface of the positioning key groove, a plurality of dial indicators for measuring the symmetry degree of the positioning key groove are arranged on the fixing frame, and measuring heads of the dial indicators are abutted to the positioning plane; this scheme can be quick, accurate survey the symmetry of camshaft location keyway, need not to measure through high-accuracy measuring apparatu, in actual production process, can reduce the check-out time of camshaft symmetry by a wide margin, has improved production efficiency.

Description

Camshaft positioning key groove symmetry degree checking fixture

Technical Field

The utility model relates to a symmetry detects technical field, concretely relates to utensil is examined to camshaft location keyway symmetry.

Background

When the camshaft is installed in an engine, an included angle between each cylinder cam of the camshaft and the timing gear needs to be adjusted, an angle positioning key groove is generally formed in the camshaft, and the included angle between each cylinder cam of the camshaft and the key groove is ensured; two surfaces of the positioning key groove are generally distributed symmetrically about the central plane of the camshaft, and the positioning key groove is also distributed asymmetrically, but the positioning key groove has symmetry requirements about the central plane of the camshaft; at present, a commonly used detection mode is that a three-coordinate measuring instrument is adopted to measure the symmetry degree of a key groove, the measurement time is long, and the production efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to the not enough of above-mentioned prior art, the utility model provides an utensil is examined to camshaft location keyway symmetry for a location reference plane of measuring the location keyway is about the symmetry of camshaft central plane, and examines the utensil and make, maintain that the maintenance is with low costs, and measuring speed is fast, and ten minutes has economical and efficiency nature.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides an utensil is examined to camshaft location keyway symmetry, which comprises a base plate, be provided with first base and second base on the bottom plate, the activity is provided with first top on the first base, fixed second top and the mount of being provided with on the second base, first top and the top clearance of second set up in opposite directions, the activity is provided with the location frock on the mount, the location plane at location frock top is laminated mutually with the reference surface of location keyway, be provided with a plurality of percentage tables that are used for measuring location keyway symmetry on the mount, the gauge head and the location plane looks butt of a plurality of percentage tables.

The first top and the second top are used for being matched and fixed with center holes at two ends of the camshaft so as to clamp the camshaft, the fixing frame is movably provided with a positioning tool, a positioning plane at the top of the fixing frame is attached to a reference surface of a positioning key groove in the camshaft, and then the symmetry degree of the positioning key groove can be measured through a dial indicator.

Furthermore, a tip sleeve and a pressure rod are arranged on the first base, the first tip is arranged on the tip sleeve in a sliding mode, a stop block is arranged at the rear end of the first tip, one end of the pressure rod is abutted to the inner side of the stop block, the middle of the pressure rod is hinged to a connecting plate, and the connecting plate is fixedly arranged at the rear end of the tip sleeve.

The pressure lever is used as a driving mechanism of the first tip, and when the pressure lever is manually pressed down, the other end of the pressure lever pushes the stop block at the rear end of the first tip under the action of the lever, so that the first tip moves towards the rear end.

Furthermore, a tip spring used for resetting the first tip is arranged in the tip sleeve, and the tip spring is sleeved on the first tip.

When the first center moves towards the rear end, the center spring contracts, the tension of the center spring is utilized to realize the automatic reset of the first center after the compression rod is released, and meanwhile, the first center tightly pushes the camshaft under the action of the center spring.

Furthermore, the bottom of the positioning tool is fixedly provided with two vertical positioning guide pillars, the two guide pillars are movably arranged on the fixed frame in a penetrating mode, and the bottoms of the two guide pillars are fixedly connected through a limiting plate.

Through two vertical positioning guide posts, the positioning tool can move in the vertical direction, so that the positioning plane at the top of the positioning tool is controlled to be attached to the reference surface of the positioning key groove.

Furthermore, positioning springs are arranged on the two positioning guide pillars between the positioning tool and the fixing frame.

And the positioning plane is tightly attached to the reference surface of the positioning key groove on the camshaft by using the tension of the positioning spring.

Furthermore, a bolt hole is formed in the middle of the limiting plate, a limiting bolt is matched with the bolt hole, and one end of the limiting bolt is abutted to the fixing frame.

Through rotating the limiting bolt, the position adjustment of the limiting plate can be realized, and therefore the position adjustment of the positioning tool is realized.

Furthermore, the plurality of dial indicators comprise at least two dial indicators, and measuring heads of the two dial indicators are vertically arranged at two ends of the positioning plane.

The measuring head of the dial indicator is vertically abutted to the positioning plane, so that the measuring data of the dial indicator is more accurate.

The utility model has the advantages that:

1. the first center and the second center are respectively abutted with the center holes at the two ends of the camshaft, the first center and the second center tightly prop the camshaft through the tension of a center spring, and the center plane of the camshaft is determined by the center holes at the two ends of the camshaft, so that the center determined by the first center and the second center is the center of the camshaft; the tension of a positioning spring at the bottom of the positioning tool is utilized to ensure that a positioning plane at the top of the positioning tool is attached to a datum plane of a cam shaft positioning key groove, the symmetry of the positioning plane about two top centers is equal to the symmetry of the cam shaft positioning key groove about the center plane of the cam shaft, and the symmetry of the cam shaft positioning key groove is measured through the symmetry of the positioning tool positioning plane measured by a dial indicator.

2. The scheme can quickly and accurately measure the symmetry degree of the camshaft positioning key groove without a high-precision measuring instrument; in the actual production process, the inspection time of the symmetry degree of the camshaft can be greatly reduced, and the production efficiency is greatly improved.

Drawings

Fig. 1 is a side view of the present solution.

Fig. 2 is a perspective view of the present solution.

Fig. 3 is a vertical sectional view of the positioning guide pillar in the scheme.

Fig. 4 is a perspective view of the camshaft.

Fig. 5 is an end view of a camshaft.

The positioning tool comprises a base plate 1, a bottom plate 2, a first base 3, a second base 4, a first tip 5, a second tip 6, a fixing frame 7, a positioning tool 8, a dial indicator 9, a tip sleeve 10, a pressure rod 11, a stop dog 12, a connecting plate 13, a tip spring 14, a positioning guide pillar 15, a limiting plate 16, a positioning spring 17, a limiting bolt 18, a tensioning screw 19, a positioning plane 20, a cam shaft 21 and a positioning key groove.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.

As shown in fig. 1 and 2, the camshaft positioning key groove symmetry degree detection tool in the scheme comprises a base plate 1, wherein a first base 2 and a second base 3 are arranged on the base plate 1, a first tip 4 is movably arranged on the first base 2, a second tip 5 and a fixing frame 6 are fixedly arranged on the second base 3, the first tip 4 and the second tip 5 are arranged in a gap and oppositely, and the first tip 4 and the second tip 5 are used for being matched and fixed with central holes at two ends of a camshaft 20 so as to clamp the camshaft 20; the fixing frame 6 is provided with a positioning tool 7 and two dial indicators 8 for measuring the symmetry degree of the positioning key slot 21.

In specific implementation, as shown in fig. 1, an apex sleeve 9 and a pressure lever 10 are arranged on a first base 2, a first apex 4 is slidably arranged on the apex sleeve 9, a stop block 11 is arranged at the rear end of the first apex 4, one end of the pressure lever 10 abuts against the inner side of the stop block 11, the middle part of the pressure lever 10 is hinged to a connecting plate 12, the connecting plate 12 is fixedly arranged at the rear end of the apex sleeve 9, the pressure lever 10 serves as a driving mechanism of the first apex 4, and when the pressure lever 10 is manually pressed down, the other end of the pressure lever 10 pushes the stop block 11 at the rear end of the first apex 4 to enable the first apex 4 to move towards the rear end; the centre sleeve 9 is internally provided with a centre spring 13 for resetting the first centre 4, the centre spring 13 is sleeved on the first centre 4, when the first centre 4 moves towards the rear end, the centre spring 13 contracts, the compression rod 10 is released, the automatic resetting of the first centre 4 is realized by utilizing the tension of the centre spring 13, and meanwhile, the first centre 4 tightly pushes the camshaft 20 under the action of the centre spring 13.

As shown in fig. 1 and 3, the fixing frame 6 is U-shaped, the positioning plane 19 at the top of the positioning tool 7 is attached to the reference plane of the positioning key slot 21, the bottom of the positioning tool 7 is fixedly connected with two vertical positioning guide pillars 14 through tensioning screws 18, the lower end of the fixing frame 6 is provided with vertical guide pillar through holes, the two positioning guide pillars 14 are movably inserted into the guide pillar through holes of the fixing frame 6, the bottoms of the two positioning guide pillars 14 are fixedly connected through limiting plates 15, the limiting plates 15 are fixed with the guide pillars through the tensioning screws 18, and the positioning tool 7 can move in the vertical direction through the two vertical positioning guide pillars 14, so that the positioning plane 19 at the top of the positioning tool 7 is adjusted to be attached to the reference plane of the positioning key slot 21; and positioning springs 16 are arranged on the two positioning guide pillars 14 between the positioning tool 7 and the fixed frame 6. The tension of the positioning spring 16 ensures that the positioning plane 19 is tightly attached to the reference surface of the positioning key groove 21 on the camshaft 20.

As shown in fig. 3, a bolt hole is formed in the middle of the limiting plate 15, a limiting bolt 17 is matched with the bolt hole, one end of the limiting bolt 17 abuts against the fixing frame 6, and the limiting bolt 17 is rotated to realize position adjustment of the limiting plate 15, so that position adjustment of the positioning tool 7 is realized.

As shown in fig. 1 and 2, two mounting holes are formed in the upper end of the fixing frame 6, the two dial indicators 8 are respectively and fixedly arranged in the two mounting holes, the measuring heads of the two dial indicators 8 are abutted to the positioning plane 19, and the measuring heads of the two dial indicators 8 are vertically arranged at two ends of the positioning plane 19, so that the measuring error of the positioning plane 19 can be reduced by arranging the plurality of dial indicators 8 to measure the positioning plane 19, and meanwhile, the measuring heads of the dial indicators 8 are perpendicular to the positioning plane 19, so that the data measured by the dial indicators 8 are more accurate.

In summary, as shown in fig. 1 to 5, in the present embodiment, the first tip 4 and the second tip 5 are respectively abutted against the central holes at two ends of the camshaft 20, and the first tip 4 causes the first tip 4 and the second tip 5 to tightly press the camshaft 20 through the tension of the tip spring 13, and since the central plane of the camshaft 20 is determined by the central holes at two ends of the camshaft 20, the center determined by the first tip 4 and the second tip 5 is the center of the camshaft 20; the tension of a positioning spring 16 at the bottom of the positioning tool 7 is utilized to ensure that a positioning plane 19 at the top of the positioning tool 7 is attached to a reference surface of a positioning key groove 21 of a camshaft 20, the symmetry of the positioning plane 19 relative to the centers of two centers is equal to the symmetry of the positioning key groove 21 of the camshaft 20 relative to the center surface of the camshaft 20, and the symmetry of the positioning plane 19 of the positioning tool 7 is measured through a dial indicator 8, so that the measurement of the symmetry of the positioning key groove 21 of the camshaft 20 is realized; meanwhile, the scheme can quickly and accurately measure the symmetry degree of the positioning key groove 21 of the camshaft 20 without a high-precision measuring instrument; in the actual production process, the inspection time of the symmetry degree of the camshaft 20 can be greatly reduced, and the production efficiency is greatly improved.

Claims

1. The camshaft positioning key groove symmetry degree detection tool is characterized by comprising a bottom plate (1), wherein a first base (2) and a second base (3) are arranged on the bottom plate (1), a first tip (4) is movably arranged on the first base (2), a second tip (5) and a fixing frame (6) are fixedly arranged on the second base (3), the first tip (4) and the second tip (5) are arranged in a gap and in opposite directions, a positioning tool (7) is movably arranged on the fixing frame (6), a positioning plane (19) at the top of the positioning tool (7) is attached to a reference surface of a positioning key groove (21), a plurality of dial indicators (8) used for measuring the symmetry degree of the positioning key groove (21) are arranged on the fixing frame (6), and measuring heads of the dial indicators (8) are in butt joint with the positioning plane (19).

2. The camshaft positioning key groove symmetry degree detection tool according to claim 1, characterized in that a tip sleeve (9) and a pressure lever (10) are arranged on the first base (2), the first tip (4) is slidably arranged on the tip sleeve (9), a stop block (11) is arranged at the rear end of the first tip (4), one end of the pressure lever (10) abuts against the inner side of the stop block (11), the middle of the pressure lever (10) is hinged to a connecting plate (12), and the connecting plate (12) is fixedly arranged at the rear end of the tip sleeve (9).

3. The camshaft positioning key groove symmetry degree detection tool according to claim 2, characterized in that a tip spring (13) for resetting the first tip (4) is arranged in the tip sleeve (9), and the tip spring (13) is sleeved on the first tip (4).

4. The camshaft positioning key groove symmetry degree checking fixture according to claim 1, wherein two vertical positioning guide posts (14) are fixedly arranged at the bottom of the positioning tool (7), the two positioning guide posts (14) are movably arranged on the fixed frame (6) in a penetrating manner, and the bottoms of the two positioning guide posts (14) are fixedly connected through a limiting plate (15).

5. The camshaft positioning key slot symmetry degree checking fixture according to claim 4, wherein positioning springs (16) are arranged on two positioning guide columns (14) between the positioning tool (7) and the fixing frame (6).

6. The camshaft positioning key groove symmetry degree detection tool according to claim 4, wherein a bolt hole is formed in the middle of the limiting plate (15), a limiting bolt (17) is matched with the bolt hole, and one end of the limiting bolt (17) is abutted to the fixing frame (6).

7. The camshaft positioning key slot symmetry degree detection tool according to claim 1, characterized in that the plurality of dial indicators (8) comprise at least two dial indicators (8), and measuring heads of the two dial indicators (8) are vertically arranged at two ends of a positioning plane (19).