CN115419480B - Gear and camshaft coupling mechanism - Google Patents

Gear and camshaft coupling mechanism Download PDF

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Publication number
CN115419480B
CN115419480B CN202210905534.3A CN202210905534A CN115419480B CN 115419480 B CN115419480 B CN 115419480B CN 202210905534 A CN202210905534 A CN 202210905534A CN 115419480 B CN115419480 B CN 115419480B
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CN
China
Prior art keywords
spline
gear
plug
semicircular
cam shaft
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CN202210905534.3A
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Chinese (zh)
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CN115419480A (en
Inventor
于波
袁哲
庄丽
张晓琴
朱伟青
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China North Engine Research Institute Tianjin
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China North Engine Research Institute Tianjin
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Priority to CN202210905534.3A priority Critical patent/CN115419480B/en
Publication of CN115419480A publication Critical patent/CN115419480A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/026Gear drive
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2250/00Camshaft drives characterised by their transmission means
    • F01L2250/06Camshaft drives characterised by their transmission means the camshaft being driven by gear wheels
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Abstract

The invention provides a connecting mechanism of a gear and a cam shaft, which comprises a spline plug, an inner spline, a cam shaft and a bolt retainer ring; the inner spline gear is arranged at one end of the cam shaft; the spline tooth plug is arranged at the end part of the cam shaft through an inner spline gear; the bolt check ring is arranged on the internal spline and the spline plug; the inner concave tooth groove is formed in the circumferential direction of the end face of the outer side of the fluted disc of the tooth screw plug, a plurality of first semicircular through holes are formed in the circumferential direction of the other side of the flanging of the tooth screw plug, and the screw rotation direction of the tooth screw plug is opposite to the rotation direction of the installation camshaft. According to the connecting mechanism of the gear and the cam shaft, the operability and the reliability of the connecting device of the gear and the cam shaft in a laboratory are improved, the complexity of the original connecting mode of the gear and the cam shaft is reduced, the number of parts of the connecting device is reduced, the economic cost and the time cost in the engine performance test process are saved, and the reliability of the disassembly and assembly of the valve actuating mechanism of the engine is improved.

Description

Gear and camshaft coupling mechanism
Technical Field
The invention belongs to the technical field of engine tests, and particularly relates to a connecting mechanism of a gear and a cam shaft.
Background
For the three elements of engine performance, namely oil, gas and chamber, the ventilation process occupies an important component part, which determines the optimization direction of an air inlet and outlet system of the engine, so that tests such as different valve train scheme verification, two-stroke and four-stroke online conversion, verification of higher valve train rotation speed and the like are increasingly focused by basic research and development personnel, and therefore, the provision of a safe, simple and reliable connecting mechanism of a gear and a cam shaft becomes necessary.
Disclosure of Invention
In view of the above, the invention aims to provide a gear and camshaft connecting mechanism to solve the technical problems of safety, convenience, effective installation and disassembly of a gear and camshaft connecting device for test.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the connecting mechanism of the gear and the cam shaft comprises a spline plug, an inner spline gear, the cam shaft and a bolt check ring, wherein the inner spline gear is arranged at one end of the cam shaft; the spline tooth plug is arranged at the end part of the cam shaft through an inner spline gear; the bolt check ring is arranged on the internal spline and the spline plug; the tooth screw plug is a screw plug with a flanging tooth disc; the circumference of the outer end surface of the flanging fluted disc is provided with an inward concave spline groove, the screw thread of the spline plug is opposite to the rotation direction of the camshaft, the spline plug is provided with a flanging fluted disc, the circumference of the outer end surface of the flanging fluted disc is provided with an inward concave spline groove, the circumference of the other side of the flanging is provided with a first semicircular through hole with the diameter of 1.5mm, the first semicircular through holes are distributed along the circumference without equal intervals, the incremental pitch is adopted for distribution, the screw thread of the plug is divided into two types, the left-handed screw thread and the right-handed screw thread, the screw thread specification of the plug is matched with the screw thread of the side end surface of the spline groove of the camshaft, and the screw thread of the plug is opposite to the rotation direction of the camshaft.
Furthermore, the inner spline groove gear is provided with an inner spline groove, the specification of the inner spline groove is matched with that of a spline on a shaft neck of the end face of the installation cam shaft, a circumferential boss is arranged on the end face of the outer side of the gear, and a plurality of second semicircular through holes with the diameter of 1.5mm are uniformly distributed on the circumference of the boss.
Furthermore, equidistant long keys are arranged in the circumferential direction of the shaft neck of the end face of the camshaft, the dimension specification of the long keys is matched with the spline groove direction of the inner hole of the internal spline, the end face of the spline shaft head is provided with an internal threaded hole, and the pitch specification is matched with the pitch of a corresponding spline plug.
Furthermore, the bolt retainer ring is made of finished steel wires by stamping deformation, one end of the retainer ring is of a semicircular encircling structure, the other end face of the retainer ring is of a vertical structure with an annular downward pointing center, the diameter of the bolt retainer ring is 1.5mm, and the bolt retainer ring is matched with a flanging semicircular through hole of the spline plug and a semicircular through hole of a circumferential boss of the end face of the inner spline.
Compared with the prior art, the connecting mechanism of the gear and the cam shaft has the following beneficial effects:
(1) According to the invention, the semicircular hole on the inner side of the turnup fluted disc of the spline plug, the inner spline gear and the bolt retainer ring can be aligned with the semicircular hole on the circumferential boss on the end face of the inner spline gear to form a whole circle of 1.5mm, and the bolt retainer ring is installed to lock, and meanwhile, the spline tooth slot on the outer side of the turnup fluted disc of the spline plug is utilized to realize effective connection of the spline plug and the inner spline gear, so that the operation reliability and installability of a valve mechanism are improved, and the time cost and economy in the engine performance test process are saved.
(2) According to the invention, the design of the spiral direction of the spline plug and the counter-spiral direction of the matched cam shaft is realized, so that the self-locking of the spline plug in the rotating process is realized, the inner spline gear is connected with the cam shaft through the inner spline groove, the effective connection of the gear and the cam shaft is realized, and the time cost in the engine performance test process is saved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic illustration of a gear and camshaft connection mechanism according to the present invention;
FIG. 2 is a schematic cross-sectional view of a gear and camshaft coupling mechanism according to the present invention;
FIG. 3 is a schematic side view of a gear and camshaft connection mechanism according to the present invention;
FIG. 4 is a schematic view of a gear and cam shaft connecting mechanism of the present invention;
FIG. 5 is a schematic cross-sectional view of an internal spline of a gear-camshaft connection according to the present invention;
FIG. 6 is a schematic view of a camshaft of a gear and camshaft connection mechanism according to the present invention;
FIG. 7 is a schematic view of a tooth plug of a gear and camshaft connection mechanism according to the present invention;
FIG. 8 is a schematic diagram of an end face of a tooth plug of a gear and camshaft connecting mechanism according to the present invention;
FIG. 9 is a side view of a tooth plug of a gear and camshaft connection mechanism according to the present invention;
fig. 10 is a schematic view of a latch retainer ring of a gear and cam shaft connecting mechanism according to the present invention.
Reference numerals illustrate:
1. a tooth screw plug; 11. concave flower tooth grooves; 12. a first semicircular through hole; 2. an internal spline; 21. an inner spline groove gear; 22. a circumferential boss; 23. a second semicircular through hole; 3. a cam shaft; 4. and a bolt retainer ring.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1-10, the connecting mechanism of the gear and the cam shaft comprises a spline plug 1, wherein the spline plug 1 is a plug with a flanging fluted disc, an inner concave spline groove is arranged in the circumferential direction of the outer end surface of the flanging fluted disc, semicircular through holes with the diameter of 1.5mm are arranged in the circumferential direction of the other side of the flanging, the semicircular through holes are distributed along the circumference without equal intervals, the progressive pitch is adopted for distribution, the screw threads of the plug are divided into two types, left-handed threads and right-handed threads, the screw thread specification and the screw threads of the plug are matched with the inner threads of the side end surface of the spline groove of the mounting cam shaft, and the screw threads of the plug are opposite to the rotation direction of the mounting cam shaft;
the internal spline gear 2 is a gear with an internal spline groove, the specification of the internal spline is matched with that of a spline on the end face journal of the installation camshaft 3, a circumferential boss is arranged on the outer end face of the gear, and a plurality of semicircular through holes with the diameter of 1.5mm are uniformly distributed on the circumference of the boss;
equidistant long keys are arranged in the circumferential direction of the end face journal of the camshaft 3, the dimension specification of the long keys is matched with the direction of spline grooves of the inner hole of the internal spline 2, the end face of the spline shaft head is provided with an internal threaded hole, and the pitch specification is matched with the pitch of a corresponding spline plug;
the bolt retainer ring 4 is made of finished steel wires by stamping deformation, one end of the retainer ring is of a semicircular encircling structure, the other end face of the retainer ring is of a vertical structure with an annular downward pointing center, the diameter of the steel wires is 1.5mm, and the steel wires are matched with a flanging semicircular through hole of the spline plug 1 and a semicircular through hole of a circumferential boss of the end face of the internal spline gear 2.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention relates to a gear and camshaft connecting mechanism, which is shown in figures 1 to 10 and comprises a spline plug 1, an inner spline 2, a camshaft 3 and a bolt retainer 4, wherein the spline plug 1 is a threaded plug with a flanging fluted disc, an inner concave spline groove 11 is arranged in the circumferential direction of the outer end surface of the flanging fluted disc, first semicircular through holes 12 with the diameter of 1.5mm are arranged in the circumferential direction of the other side of the flanging, the first semicircular through holes 12 are distributed along the circumference without equal intervals, the hole distances of every two semicircular holes are distributed in an incremental mode, the hole distances of every two semicircular holes are gradually increased by 1mm, the sequential alignment of the flanging fluted disc semicircular holes of the spline plug 1 and the circumferential semicircular holes of the boss of the inner spline 2 can be realized through the incremental hole distances, the thread rotation direction of the screw plug is divided into two types, the left-handed thread and the right-handed thread, the thread specification of the screw plug is matched with the rotation direction of the inner thread of the side end surface of the flange spline groove of the installation camshaft, the rotation direction of the screw plug thread is opposite to the rotation direction of the installation camshaft, and the rotation self-locking of the spline plug 1 and the camshaft 3 is realized through reverse thread installation.
The internal spline groove gear 2 is an internal spline groove gear, the specification of the internal spline groove gear 21 is matched with a spline on the shaft neck of the end face of the installation cam shaft 3, 10 spline grooves are recommended to be used for connection, the internal spline gear 2 is convenient to process and can be effectively connected with the cam shaft 3, a circumferential boss 22 is arranged on the end face of the outer side of the gear, a plurality of second semicircular through holes with the diameter of 1.5mm are uniformly distributed on the circumference of the boss, the second semicircular through holes 22 are uniformly distributed in the circumferential direction at equal intervals, and the realization of a 1.5mm full circle locking mounting hole is realized by sequentially aligning with semicircular holes of the flanging fluted disc of the spline plug 1.
Equidistant long keys are arranged in the circumferential direction of the end face journal of the camshaft 3, the dimension specification of the long keys is matched with the spline groove direction of the inner hole of the internal spline gear 2, the end face of the spline shaft head is provided with an internal threaded hole, and the pitch specification is matched with the pitch of a corresponding spline plug.
The bolt retainer ring 4 is made of a finished steel wire through stamping deformation, one end of the retainer ring is of a semicircular encircling structure, the other end face of the retainer ring is of a vertical structure with an annular downward pointing center, the diameter of the steel wire is 1.5mm, the steel wire is matched with a flanging semicircular through hole of the spline plug 1 and a semicircular through hole of a circumferential boss of the end face of the internal spline gear 2, clearance fit is adopted between the outer diameter of the steel wire and a round hole with the diameter of 1.5mm, and the tolerance is controlled to be +0.03 to +0.06mm.
The invention relates to an installation and adjustment method of an adjustable valve dismantling and inspection mechanism, which comprises the following steps:
1. installing a corresponding camshaft 3 into a valve shaft hole according to the requirement of reverse threads, then inserting an internal spline 2 into the end spline shaft neck of the camshaft 3, wherein the internal spline of the internal spline 2 is in clearance fit with the end spline of the camshaft 3, and the tolerance is +0.01 to +0.03;
2. installing the corresponding spline plug 1 according to the reverse thread requirement, screwing the spline plug 1 in the correct direction by using a fastening tool, and after the screwing moment of the spline plug 1 reaches 80Nm, observing whether a flanging fluted disc of the spline plug 1 is aligned with a semicircular hole on the boss circumference of the internal spline gear 2 from the side by an installer, and then continuously screwing the spline plug 1 until a round circular hole is aligned;
3. the bolt retainer ring 4 is sleeved on the turnup fluted disc of the spline plug 1 and the boss circumference of the internal spline gear 2, then the bolt retainer ring 4 is broken off by using a nipper pliers, a vertical cylinder of the bolt retainer ring is inserted into a round hole formed by the turnup fluted disc of the spline plug 1 and the boss of the internal spline gear 2, and finally the top end of the vertical cylinder is knocked by a hammer so that the vertical cylinder can be firmly inserted into the round hole, so that all the installation of a gear and a cam shaft connecting mechanism is completed, and the installation of the other cam shaft and the gear is completed only by selecting the corresponding reverse spline plug 1 and the cam shaft 3.
According to the connecting mechanism of the gear and the cam shaft, the operability and the reliability of the connecting device of the gear and the cam shaft in a laboratory are improved, the complexity of the original connecting mode of the gear and the cam shaft is reduced, the number of parts of the connecting device is reduced, the processing difficulty of each part is reduced, the economic cost and the time cost in the performance test process of the engine are saved, and the reliability of the disassembly and assembly of the valve mechanism of the engine is improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (9)

1. A gear and camshaft coupling mechanism, its characterized in that: comprises a spline plug (1), an inner spline gear (2), a cam shaft (3) and a bolt retainer ring (4);
the inner spline (2) is arranged at one end of the cam shaft (3); the spline plug (1) is arranged at the end part of the cam shaft (3) through the inner spline gear (2); the bolt retainer ring (4) is arranged on the internal spline (2) and the spline plug (1);
an inner concave spline groove (11) is formed in the circumferential direction of the end face of the outer side of the fluted disc of the spline plug (1), a plurality of first semicircular through holes (12) are formed in the circumferential direction of the other side of the flanging of the spline plug (1), and the screwing direction of threads of the spline plug (1) is opposite to the rotation direction of the camshaft (3);
the first semicircular through holes (12) are distributed along the circumferential hole pitch in an increasing manner;
the end face of the inner spline (2) is provided with a circumferential boss (22), and the circumferential boss (22) is uniformly provided with a plurality of second semicircular through holes (23) along the circumference;
one end of the bolt check ring (4) is of a semicircular encircling structure, the other end face of the bolt check ring is of a vertical structure with an annular downward pointing center, and the diameter of the bolt check ring (4) is matched with the first semicircular through hole (12) of the spline plug (1) and the second semicircular through hole (23) of the end face circumference boss (22) of the inner spline (2).
2. A gear and camshaft connection as claimed in claim 1, wherein: the thread of the spline plug (1) is matched with the internal thread of the side end face of the spline groove of the cam shaft (3), and the rotation direction of the thread of the spline plug (1) is opposite to the rotation direction of the cam shaft (3).
3. A gear and camshaft connection as claimed in claim 2, wherein: the diameter of the first semicircular through hole (12) is 1.5mm.
4. A gear and camshaft connection according to claim 3, wherein: an inner spline groove gear (21) is arranged in the inner spline gear (2), and the inner spline groove gear (21) is matched with a spline on the end face journal of the cam shaft (3).
5. The gear and camshaft connection of claim 4, wherein: the diameter of the second semicircular through hole (23) is 1.5mm.
6. The gear and camshaft connection of claim 5, wherein: the diameter of the first semicircular through hole (12) is the same as that of the second semicircular through hole (23).
7. A gear and camshaft connection as claimed in claim 1, wherein: the long keys are arranged in the circumferential direction of the end face shaft neck of the camshaft (3), the long keys correspond to spline grooves of the internal spline gear (2), the end face of the shaft head of the camshaft (3) is provided with an internal threaded hole, and the thread pitch corresponds to the thread pitch of the corresponding spline plug (1).
8. A gear and camshaft connection as claimed in claim 1, wherein: the bolt retainer ring (4) is manufactured by stamping and deforming a finished steel wire.
9. The gear and camshaft connection of claim 7, wherein: the diameter of the bolt retainer ring (4) is 1.5mm.
CN202210905534.3A 2022-07-29 2022-07-29 Gear and camshaft coupling mechanism Active CN115419480B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210905534.3A CN115419480B (en) 2022-07-29 2022-07-29 Gear and camshaft coupling mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210905534.3A CN115419480B (en) 2022-07-29 2022-07-29 Gear and camshaft coupling mechanism

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CN115419480A CN115419480A (en) 2022-12-02
CN115419480B true CN115419480B (en) 2023-07-18

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0901478D0 (en) * 2009-01-30 2009-03-11 Mechadyne Plc Camshaft and phaser assembly
EP2058478A1 (en) * 2007-11-09 2009-05-13 hofer mechatronik GmbH Adjustment device for modification of the relative position of a camshaft
CN203050831U (en) * 2013-02-22 2013-07-10 慈溪市联发机械有限公司 Cam shaft decompression device
CN106369138A (en) * 2016-09-13 2017-02-01 中国北方发动机研究所(天津) Camshaft gear with phase adjustment function, valve timing structure and assembling method
CN210087425U (en) * 2019-06-29 2020-02-18 浙江美可达摩托车有限公司 Variable valve timing structure
CN214616701U (en) * 2021-04-08 2021-11-05 绵阳市阳晨汽车零部件有限公司 High-performance vermicular graphite cast iron camshaft device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009009252B4 (en) * 2009-02-17 2017-10-26 Schaeffler Technologies AG & Co. KG Hydraulic camshaft adjuster with axial screw plug

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2058478A1 (en) * 2007-11-09 2009-05-13 hofer mechatronik GmbH Adjustment device for modification of the relative position of a camshaft
GB0901478D0 (en) * 2009-01-30 2009-03-11 Mechadyne Plc Camshaft and phaser assembly
CN203050831U (en) * 2013-02-22 2013-07-10 慈溪市联发机械有限公司 Cam shaft decompression device
CN106369138A (en) * 2016-09-13 2017-02-01 中国北方发动机研究所(天津) Camshaft gear with phase adjustment function, valve timing structure and assembling method
CN210087425U (en) * 2019-06-29 2020-02-18 浙江美可达摩托车有限公司 Variable valve timing structure
CN214616701U (en) * 2021-04-08 2021-11-05 绵阳市阳晨汽车零部件有限公司 High-performance vermicular graphite cast iron camshaft device

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