CN211174355U

CN211174355U - Double-layer wheel train structure with timing inspection structure

Info

Publication number: CN211174355U
Application number: CN201921554764.XU
Authority: CN
Inventors: 张振坤; 吴定勇; 苏怀林
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2020-08-04
Anticipated expiration: 2029-09-18

Abstract

The utility model discloses a double-layer wheel train structure with a timing inspection structure, which comprises a driving gear and a driven gear, wherein the driving gear comprises a large gear and a small gear which are coaxially arranged, and the small gear is meshed with the driven gear; the bull gear is equipped with first timing pinhole, and driven gear is equipped with the second timing pinhole. The utility model discloses the pinhole is observed easily when assembling the gear, can regard as the supplementary mark of assembly. Meanwhile, after assembly, whether the phases are aligned or not can be checked through the plug pins, so that the workload of assembly personnel is reduced, and the assembly accuracy is improved.

Description

Double-layer wheel train structure with timing inspection structure

Technical Field

The utility model relates to the technical field of engines, especially, relate to a take double-deck train structure of inspection structure in right time.

Background

The gear transmission is widely applied to engines, and the accurate phase position of the gears is ensured when the gears are assembled. This is because the camshaft or the injection pump must maintain an accurate phase angle difference from the crank angle to ensure the valve opening angle and the injection timing. The phase angle relation of the existing gear train is realized by adjusting the gear and aligning a timing mark during assembly.

The gear-driven engine has more gears, and is often used in a double-layer gear train. For the double-layer gear train structure, due to the shielding of the outer gear train, the timing mark of the inner gear train cannot be seen, and an assembler can adopt a mode of marking on the gear, but the problems of insufficient light, difficulty in observation, overlong assembly time and the like exist. Once the phase position is assembled wrongly, the engine cannot be started if the phase position is not assembled correctly; the gear train, the piston and the like are broken down.

Chinese patent (CN102748128B) discloses a common rail engine timing gear train, in which a camshaft gear is provided with a camshaft timing pin hole, and a gear chamber timing pin hole corresponding to the camshaft gear is also provided on the gear chamber; a flywheel timing pin hole and a flywheel housing timing pin hole are respectively formed in the flywheel and the flywheel housing, and when the engine is positioned at the compression top dead center of the first cylinder, the crankshaft gear is positioned by means of the flywheel timing pin hole and the flywheel housing timing pin hole which are coaxial; the camshaft gear is positioned by means of a camshaft timing pin hole and a corresponding gear chamber timing pin hole, so that the gas distribution timing of the engine is ensured; and an electronic control unit of the engine guarantees the fuel injection timing of the engine according to the phase signals of the camshaft code disc and the flywheel code disc read by the sensor.

Above-mentioned prior art, the locating pin hole is established respectively on gear and gear room, or establish respectively on flywheel and flywheel shell, fixes a position through the pinhole respectively in the time of right time, when carrying out gear assembly, must look for the pinhole in right time on gear room or flywheel shell and fix a position still, and often the pinhole can be sheltered from by the gear, inconvenient observation.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a take double-deck train structure of examining in right time, the pinhole is observed easily during the assembly, can regard as the supplementary mark of assembly. Meanwhile, after assembly, whether the phases are aligned or not can be checked through the plug pins, so that the workload of assembly personnel is reduced, and the assembly accuracy is improved.

The utility model discloses take following technical scheme to realize above-mentioned purpose:

a double-layer gear train structure with a timing inspection structure comprises a driving gear and a driven gear, wherein the driving gear comprises a large gear and a small gear which are coaxially arranged, and the small gear is meshed with the driven gear; the bull gear is equipped with first timing pinhole, driven gear is equipped with the second timing pinhole.

Preferably, the driven gear is one of a camshaft gear and an injection pump gear.

The utility model has the advantages that:

the timing inspection pin holes are added on the gears with double-layer gear train structures, and the pin holes are easy to observe during assembly and can be used as auxiliary marks for assembly. Meanwhile, after assembly, whether the phases are aligned or not can be checked through the plug pins, so that the workload of assembly personnel is reduced, and the assembly accuracy is improved.

Drawings

Fig. 1 is a general structural diagram of a double-layer wheel train structure with a timing inspection structure provided in an embodiment of the present invention;

fig. 2 is a side view of fig. 1.

In the figure, 1 is a driving gear, 2 is a driven gear, 3 is a big gear, 4 is a small gear, 5 is a first timing pin hole, and 6 is a second timing pin hole.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings 1-2 and the detailed description thereof.

Please refer to fig. 1 and fig. 2, the embodiment of the present invention provides a double-layer wheel train structure with a timing inspection structure, wherein the double-layer wheel train structure comprises a driving gear 1 and a driven gear 2. The driving gear 1 includes a large gear 3 and a small gear 4 coaxially arranged, and the small gear 4 is engaged with the driven gear 2. The bull gear 3 is equipped with first timing pinhole 5, and driven gear 2 is equipped with second timing pinhole 6, and first timing pinhole 5 and second timing pinhole 6 pass through the bolt and connect.

The utility model discloses a take double-deck train structure of examining in right time when using, pinion 4 is responsible for the drive by drive gear 2, has the phase place matching relation between the two. When assembling, the driving gear 1 and the driven gear 2 are mounted on the respective fixed shafts, and the pinion gear 4 is engaged with the driven gear 2. Whether the phases match can be judged by observing whether the first timing pin hole 5 and the second timing pin hole 6 are aligned in the process, and the phase matching can be used as an auxiliary mark for assembly. After assembly, whether the driving gear 1 and the driven gear 2 are assembled correctly can be checked in a mode that the inserted pins are inserted into the first timing pin hole 5 and the second timing pin hole 6, and if the inserted pins can penetrate through the driving gear 1 and the driven gear 2 through the first timing pin hole 5 and the second timing pin hole 6, the assembly is correct; otherwise, the assembly is incorrect. The whole assembling process reduces the workload of assembling personnel and improves the assembling accuracy. After the phase correction is completed, the plug pins are removed from the first timing pin hole 5 and the second timing pin hole 6.

Further, the driven gear 2 is one of a camshaft gear and an injection pump gear.

In the present embodiment, the gearwheel 3 and the pinion 4 are designed in one piece.

Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The double-layer gear train structure with the timing inspection structure is characterized by comprising a driving gear (1) and a driven gear (2), wherein the driving gear (1) comprises a large gear (3) and a small gear (4) which are coaxially arranged, and the small gear (4) is meshed with the driven gear (2); the bull gear (3) is equipped with first timing pinhole (5), driven gear (2) is equipped with second timing pinhole (6).

2. The double-deck gear train structure with timing verification structure according to claim 1, wherein said driven gear (2) is one of a camshaft gear and an injection pump gear.