CN213455287U - Coaxiality inspection device for inner circle and outer circle of valve guide pipe of engine cylinder head - Google Patents

Coaxiality inspection device for inner circle and outer circle of valve guide pipe of engine cylinder head Download PDF

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Publication number
CN213455287U
CN213455287U CN202022723665.9U CN202022723665U CN213455287U CN 213455287 U CN213455287 U CN 213455287U CN 202022723665 U CN202022723665 U CN 202022723665U CN 213455287 U CN213455287 U CN 213455287U
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hole
diameter
positioning
guide
valve guide
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孙仁坤
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Chongqing Zhicheng Machinery Co ltd
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Chongqing Zhicheng Machinery Co ltd
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Abstract

The coaxiality inspection device for the inner circle and the outer circle of the valve guide pipe of the engine cylinder head comprises a centering sleeve and an inspection rod, wherein a stepped through hole is formed in the axis of the centering sleeve, a positioning taper hole is formed in the small-diameter section of the stepped through hole, a guide hole for the inspection rod to insert is formed in the large-diameter section of the stepped through hole, the axes of the guide hole and the positioning taper hole are located on the same axis, a limiting hole shoulder is formed between the guide hole and the small-diameter end of the positioning taper hole, the large-diameter end of the positioning taper hole is inserted into the end, the diameter of the small-diameter end of the positioning taper hole is smaller than the minimum limit size of the diameter of the outer circle of the tail end of the valve guide pipe, and; the inspection rod is a stepped shaft, the large-diameter section of the stepped shaft is a positioning shaft section, the positioning shaft section is in small clearance fit with the guide hole, one end of the positioning shaft section is an inspection head, the diameter of the inspection head is matched with the diameter of the inner hole of the valve guide pipe, the lower end of the inspection head is provided with a guide conical surface, and the other end of the positioning shaft section is a handle with the diameter smaller than that of the positioning shaft section.

Description

Coaxiality inspection device for inner circle and outer circle of valve guide pipe of engine cylinder head
Technical Field
The utility model relates to an inspection device of engine part, in particular to axiality inspection device of engine cylinder head valve guide inside and outside circle.
Background
The inner hole of the valve guide pipe of the cylinder head of the automobile engine is in sliding fit with the valve rod, the inner hole of the guide pipe guides the sliding of the valve rod, if the inner hole of the guide pipe does not guide the valve rod accurately, the valve is not closed tightly, and the working performance of the engine can be seriously influenced. Therefore, the requirement on the processing precision of the inner hole of the guide pipe is high, and the coaxiality between the inner hole and the outer circle of the tail end of the guide pipe needs to be checked after the guide pipe is processed. At present, the coaxiality of the inner circle and the outer circle of the tail end of the catheter is detected by precision instruments such as a three-coordinate measuring instrument, a coaxiality measuring instrument and the like, the high-precision instruments are high in price, the production cost is greatly improved, only sampling detection can be performed, the detection time is long, the production progress is seriously influenced, and the production efficiency is reduced. At present, a detection instrument is also adopted to detect the coaxiality of the inner circle and the outer circle of the guide pipe, but the detection instrument needs to be used for reference during detection and needs to read the reading on the instrument, so the detection time is long, the detection speed is slow, and the production progress is influenced.
Disclosure of Invention
The utility model aims at prior art not enough, provide an engine cylinder head valve guide inside and outside circle axiality verifying attachment, its structure and simple to use, the processing cost is low, and the inspection is swift, and is long when can shorten processing, improves machining efficiency.
The technical scheme of the utility model is that: the coaxiality inspection device comprises a centering sleeve and an inspection rod, wherein a step through hole which is axially communicated is formed in the axis of the centering sleeve, a positioning taper hole for inserting and positioning the tail end of a valve guide is formed in the small-diameter section of the step through hole, a guide hole for inserting the inspection rod is formed in the large-diameter section of the step through hole, the axes of the guide hole and the positioning taper hole are located on the same axis, a limiting hole shoulder is formed between the guide hole and the small-diameter end of the positioning taper hole, the large-diameter end of the positioning taper hole is the insertion end of the valve guide, the diameter of the small-diameter end of the positioning taper hole is smaller than the minimum limit size of the diameter of the tail end of the valve guide, and the diameter of the large-diameter end of the positioning taper hole is larger than the maximum limit size of the diameter of the tail; the utility model discloses a valve guide pipe inspection device, including check rod, centering sleeve, pilot shaft, check head, pilot shaft section, pilot shaft, the one end of this stepped shaft is the location shaft section of the guiding hole complex with centering sleeve, be the little clearance fit of H6/f5 between location shaft section and the guiding hole, the one end of location shaft section sets up the inspection head that the diameter is less than the location shaft section, the diameter of inspection head is coincided with the hole diameter of valve guide and is used for inserting the inspection in the valve guide pipe hole, the lower extreme of inspection.
The lower end of the positioning shaft section of the inspection rod is provided with a guide inclined plane.
And a holding rod extending upwards is arranged on the centering sleeve.
Set up the screw hole on the centering sleeve, the lower extreme of holding the pole sets up the external screw thread section, and this external screw thread section forms the connection between holding pole and the centering sleeve with screw hole screw-thread fit.
A large-diameter hole convenient to process is arranged between the guide hole of the centering sleeve and the positioning taper hole, and the diameter of the large-diameter hole is larger than that of the guide hole.
Adopt above-mentioned technical scheme: the valve guide positioning device comprises a centering sleeve and a check rod, wherein an axially-through stepped through hole is formed in the axis of the centering sleeve, a positioning taper hole for inserting and positioning the tail end of a valve guide is formed in the small-diameter section of the stepped through hole, a guide hole for inserting the check rod is formed in the large-diameter section of the stepped through hole, the axes of the guide hole and the positioning taper hole are located on the same axis, a limiting hole shoulder is formed between the guide hole and the small-diameter end of the positioning taper hole, the large-diameter end of the positioning taper hole is an insertion end of the valve guide, the diameter of the small-diameter end of the positioning taper hole is smaller than the minimum limit size of the excircle diameter of the tail end of the valve guide, and the diameter of the large-diameter end of the positioning taper; the utility model discloses a valve guide pipe inspection device, including check rod, centering sleeve, pilot shaft, check head, pilot shaft section, pilot shaft, the one end of this stepped shaft is the location shaft section of the guiding hole complex with centering sleeve, be the little clearance fit of H6/f5 between location shaft section and the guiding hole, the one end of location shaft section sets up the inspection head that the diameter is less than the location shaft section, the diameter of inspection head is coincided with the hole diameter of valve guide and is used for inserting the inspection in the valve guide pipe hole, the lower extreme of inspection. The coaxiality testing device is simple in structure, low in manufacturing cost and simple and convenient to use. When the centering sleeve is used, the tail end of the valve guide pipe is sleeved with the centering sleeve, so that the tail end of the guide pipe extends into the positioning taper hole of the centering sleeve until the excircle of the tail end of the guide pipe is attached to the hole wall of the positioning taper hole of the centering sleeve, and the positioning taper hole and the excircle of the tail end of the guide pipe are coaxial; then the handle of the test rod is held to insert the test rod into the stepped through hole of the centering sleeve, the positioning shaft section of the test rod is in sliding fit with the guide hole of the centering sleeve in the process, and the fit between the guide hole and the positioning shaft section is in small clearance fit of H6/f5, so that the positioning shaft section is positioned, and the test head which has the same axis as the positioning shaft section and the guide hole have the same axis; in the inserting process, if the inspection head of the inspection rod can be inserted into the inner hole of the valve guide pipe, the coaxiality between the inner circle and the outer circle at the tail end of the valve guide pipe is qualified, and if the inspection head of the inspection rod cannot be inserted into the inner hole of the valve guide pipe, the coaxiality between the inner circle and the outer circle at the tail end of the valve guide pipe is unqualified. The inspection device is simple to use and quick to inspect, the inspection head can be inserted into the inner hole of the guide pipe to be qualified, otherwise, the inspection head is not qualified, whether the inspection head is qualified or not is judged simply and quickly, the machining time can be shortened, the machining efficiency is improved, and the production progress is guaranteed. And the valve guide pipes produced can be detected one by adopting the inspection device, so that the reliability of the qualified rate is improved, and the delivery probability of unqualified products is greatly reduced.
The lower end of the positioning shaft section of the inspection rod is provided with a guide inclined plane which can guide the positioning shaft section to be inserted into the guide hole of the stepped through hole, so that the inspection rod can be conveniently inserted.
The centering sleeve is provided with a holding rod extending upwards, the holding rod mainly plays a role in preventing the centering sleeve from deflecting by holding the holding rod to fix the centering sleeve when the inspection rod is inserted into the stepped through hole, and the holding rod can be fixed through a mechanical device and also can be held and fixed by hands of an inspector. Set up the screw hole on the centering sleeve, the lower extreme of holding the pole sets up the external screw thread section, and this external screw thread section and screw hole screw-thread fit form holding being connected between pole and the centering sleeve, and holding being connected and dismantling between pole and the centering sleeve are simple.
A large-diameter hole convenient to process is arranged between the guide hole of the centering sleeve and the positioning taper hole, the diameter of the large-diameter hole is larger than that of the guide hole, and the large-diameter hole facilitates processing of the stepped through hole.
The coaxiality inspection device for the inner circle and the outer circle of the valve guide pipe of the engine cylinder head has the advantages of simple structure, low manufacturing cost and simplicity and convenience in use. Meanwhile, the inspection head is simple to use and quick to inspect, the inspection head can be inserted into the inner hole of the guide pipe to be qualified, otherwise, the inspection head is not qualified, whether the inspection head is qualified or not is judged simply and quickly, the machining time can be shortened, the machining efficiency is improved, and the production progress is guaranteed. And the valve guide pipes produced can be detected one by adopting the inspection device, so that the reliability of the qualified rate is improved, and the delivery probability of unqualified products is greatly reduced.
The invention is further described with reference to the drawings and the specific embodiments.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a centering sleeve;
FIG. 3 is a schematic view of the structure of the check rod;
FIG. 4 is a schematic view of the valve guide tail end in cooperation with the centering sleeve and the inspection rod during inspection;
FIG. 5 is a schematic diagram of a valve guide of a cylinder head of an engine.
Detailed Description
Referring to fig. 1 to 5, the coaxiality testing device for the inner circle and the outer circle of the valve guide pipe of the engine cylinder head comprises a centering sleeve 2 and a testing rod 1, wherein the centering sleeve 2 and the testing rod 1 are made of metal materials. The axial center of the centering sleeve 2 is provided with an axially through stepped through hole 2-1, a small diameter section at the lower end of the stepped through hole 2-1 is provided with a positioning taper hole 2-3 for inserting and positioning the tail end of the valve guide 4, a large diameter section at the upper end of the stepped through hole 2-1 is provided with a guide hole 2-2 for inserting the inspection rod 1, and the axial centers of the guide hole 2-2 and the positioning taper hole 2-3 are positioned on the same axial center line. A limiting hole shoulder is formed between the guide hole 2-2 and the small-diameter end of the positioning taper hole 2-3, and the lower large-diameter end of the positioning taper hole 2-3 is an insertion end of the valve guide 4. The diameter of the upper small diameter end of the positioning taper hole 2-3 is smaller than the minimum limit size of the diameter of the tail end excircle 4-2 of the valve guide 4, and the diameter of the lower large diameter end of the positioning taper hole 2-3 is larger than the maximum limit size of the diameter of the tail end excircle 4-2 of the valve guide 4, so that the valve guide 4 can be smoothly inserted into the positioning taper hole 2-3 for positioning. A large-diameter hole 2-4 convenient to process is arranged between a guide hole 2-2 and a positioning taper hole 2-3 of the centering sleeve 2, the diameter of the large-diameter hole 2-4 is larger than that of the guide hole 2-2, the large-diameter hole 2-4 facilitates processing of the stepped through hole 2-1, and size precision of the guide hole 2-2 and the positioning taper hole 2-3 is guaranteed. The check rod 1 is a stepped shaft, the large-diameter section in the middle of the stepped shaft is a positioning shaft section 1-2 matched with a guide hole 2-2 of the centering sleeve 2, and a small clearance fit of H6/f5 is formed between the positioning shaft section 1-2 and the guide hole 2-2. The lower end of the positioning shaft section 1-2 of the inspection rod 1 is provided with a guide inclined plane 1-4, and the guide inclined plane 1-4 can guide the positioning shaft section 1-2 to be inserted into the guide hole 2-2 of the stepped through hole 2-1, so that the inspection rod 1 can be conveniently inserted. One end of the positioning shaft section 1-2 is provided with an inspection head 1-1 with the diameter smaller than that of the positioning shaft section 1-2, and the diameter of the inspection head 1-1 is matched with that of an inner hole 4-1 of the valve guide 4 and is used for being inserted into the inner hole 4-1 of the valve guide 4 for inspection. After the inspection head 1-1 is inserted into the inner hole 4-1 of the valve guide pipe 4, a shaft shoulder between the positioning shaft section 1-2 and the inspection head 1-1 of the inspection rod 1 is abutted against a limiting hole shoulder between the guide hole 2-2 and the small-diameter end of the positioning taper hole 2-3 for limiting. The other end of the positioning shaft section 1-2 is provided with a handle 1-3 with the diameter smaller than that of the positioning shaft section 1-2 for holding. The centering sleeve 2 is provided with a holding rod 3 extending upwards, the holding rod 3 mainly plays a role in preventing the centering sleeve 2 from deflecting by fixing the holding rod 3 to the centering sleeve 2 when the inspection rod 1 is inserted into the stepped through hole 2-1, and the holding rod 3 can be fixed through a mechanical device and can also be held and fixed by hands of an inspector. The centering sleeve 2 is provided with threaded holes 2-5, the lower end of the holding rod 3 is provided with an external thread section, the external thread section is in threaded fit with the threaded holes 2-5 to form connection between the holding rod 3 and the centering sleeve 2, and the holding rod 3 and the centering sleeve 2 are simple to connect and detach.
The coaxiality testing device is simple in structure, low in manufacturing cost and simple and convenient to use. When the centering sleeve is used, the centering sleeve 2 is sleeved at the tail end of the valve guide pipe 4, so that the tail end of the guide pipe extends into the positioning taper hole 2-3 of the centering sleeve 2 until the excircle 4-2 at the tail end of the guide pipe is attached to the hole wall of the positioning taper hole 2-3 of the centering sleeve 2. At the moment, the positioning taper hole 2-3 is coaxial with the excircle 4-2 of the tail end of the conduit, and because the axes of the guide hole 2-2 and the positioning taper hole 2-3 are positioned on the same axis, the excircle 4-2 of the tail end of the conduit is coaxial with the guide hole 2-2 at the moment. Then, a handle 1-3 of the inspection rod 1 is held, the inspection rod 1 is inserted into a stepped through hole 2-1 of the centering sleeve 2, in the process, a positioning shaft section 1-2 of the inspection rod 1 is in sliding fit with a guide hole 2-2 of the centering sleeve 2, the guide hole 2-2 is in small-gap fit with the positioning shaft section 1-2, H6/f5 is adopted as the fit between the guide hole 2-2 and the positioning shaft section, the small-gap fit of H6/f5 can ensure that the positioning shaft section 1-2 can be inserted smoothly, good positioning is formed on the positioning shaft section 1-2, the inspection head 1-1 and the guide hole 2-2 which are coaxial with the positioning shaft section 1-2 are coaxial, namely the axis of the inspection head 1-1 and the axis of the excircle 4-2 of the valve guide pipe 4 are on the same axis at the moment; in the inserting process, if the inspection head 1-1 of the inspection rod can be inserted into the inner hole 4-1 of the valve guide 4, the coaxiality between the inner circle and the outer circle at the tail end of the valve guide 4 is qualified, and if the inspection head 1-1 of the inspection rod 1 cannot be inserted into the inner hole 4-1 of the valve guide 4, the coaxiality between the inner circle and the outer circle at the tail end of the valve guide 4 is unqualified. The inspection device is simple to use and quick to inspect, the inspection head can be inserted into the inner hole of the guide pipe to be qualified, otherwise, the inspection head is not qualified, whether the inspection head is qualified or not is judged simply and quickly, the machining time can be shortened, the machining efficiency is improved, and the production progress is guaranteed. And the valve guide pipes produced can be detected one by adopting the inspection device, so that the reliability of the qualified rate is improved, and the delivery probability of unqualified products is greatly reduced.

Claims (5)

1. The utility model provides an engine cylinder head valve guide pipe inner and outer circle axiality verifying attachment which characterized in that: the valve guide positioning device comprises a centering sleeve (2) and a check rod (1), wherein an axially through stepped through hole (2-1) is arranged at the axis of the centering sleeve (2), a positioning taper hole (2-3) for inserting and positioning the tail end of a valve guide is arranged at the small diameter section of the stepped through hole (2-1), a guide hole (2-2) for inserting the check rod (1) is arranged at the large diameter section of the stepped through hole (2-1), the axes of the guide hole (2-2) and the positioning taper hole (2-3) are positioned on the same axis, a limiting hole shoulder is formed between the guide hole (2-2) and the small diameter end of the positioning taper hole (2-3), the large diameter end of the positioning taper hole (2-3) is an insertion end of the valve guide, and the diameter of the small diameter end of the positioning taper hole (2-3) is smaller than the minimum limit size of the excircle diameter of the valve guide, the diameter of the large-diameter end of the positioning taper hole (2-3) is larger than the maximum limit size of the diameter of the excircle of the tail end of the valve guide pipe; the inspection rod (1) is a stepped shaft, a large-diameter section of the stepped shaft is a positioning shaft section (1-2) matched with a guide hole (2-2) of a centering sleeve (2), a small clearance fit of H6/f5 is arranged between the positioning shaft section (1-2) and the guide hole (2-2), one end of the positioning shaft section (1-2) is provided with an inspection head (1-1) with a diameter smaller than that of the positioning shaft section (1-2), the diameter of the inspection head (1-1) is matched with the diameter of an inner hole of a valve guide pipe and used for being inserted into the inner hole of the valve guide pipe for inspection, the lower end of the inspection head (1-1) is provided with a guide conical surface (1-5), and the other end of the positioning shaft section (1-2) is provided with a handle (1-3) with a diameter smaller than that of the positioning shaft section (1-2).
2. The apparatus for checking coaxiality of an inner circle and an outer circle of a valve guide of an engine cylinder head according to claim 1, wherein: the lower end of the positioning shaft section (1-2) of the inspection rod (1) is provided with a guide inclined plane (1-4).
3. The apparatus for checking coaxiality of an inner circle and an outer circle of a valve guide of an engine cylinder head according to claim 1, wherein: the centering sleeve (2) is provided with a holding rod (3) extending upwards.
4. The apparatus for checking coaxiality of an inner circle and an outer circle of a valve guide of an engine cylinder head according to claim 3, wherein: the centering sleeve (2) is provided with a threaded hole (2-5), the lower end of the holding rod (3) is provided with an external threaded section, and the external threaded section is in threaded fit with the threaded hole (2-5) to form connection between the holding rod (3) and the centering sleeve (2).
5. The apparatus for checking coaxiality of an inner circle and an outer circle of a valve guide of an engine cylinder head according to claim 1, wherein: a large-diameter hole (2-4) convenient to process is arranged between the guide hole (2-2) of the centering sleeve (2) and the positioning taper hole (2-3), and the diameter of the large-diameter hole (2-4) is larger than that of the guide hole (2-2).
CN202022723665.9U 2020-11-23 2020-11-23 Coaxiality inspection device for inner circle and outer circle of valve guide pipe of engine cylinder head Active CN213455287U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022723665.9U CN213455287U (en) 2020-11-23 2020-11-23 Coaxiality inspection device for inner circle and outer circle of valve guide pipe of engine cylinder head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022723665.9U CN213455287U (en) 2020-11-23 2020-11-23 Coaxiality inspection device for inner circle and outer circle of valve guide pipe of engine cylinder head

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109990682A (en) * 2019-05-06 2019-07-09 广西玉柴机器股份有限公司 A kind of method and auxiliary mould measuring valve retainer circular runout

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109990682A (en) * 2019-05-06 2019-07-09 广西玉柴机器股份有限公司 A kind of method and auxiliary mould measuring valve retainer circular runout
CN109990682B (en) * 2019-05-06 2024-02-09 广西玉柴机器股份有限公司 Method for measuring radial runout of valve seat ring and auxiliary tool

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