CN204299648U - Engine and decompressor thereof - Google Patents

Engine and decompressor thereof Download PDF

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Publication number
CN204299648U
CN204299648U CN201420774702.0U CN201420774702U CN204299648U CN 204299648 U CN204299648 U CN 204299648U CN 201420774702 U CN201420774702 U CN 201420774702U CN 204299648 U CN204299648 U CN 204299648U
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China
Prior art keywords
decompression
gear
pin
movable
decompressor
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CN201420774702.0U
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Chinese (zh)
Inventor
伍良前
邹永波
肖冬
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CHONGQING YINGANG YITONG TECHNOLOGY Co Ltd
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CHONGQING YINGANG YITONG TECHNOLOGY Co Ltd
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Priority to CN201420774702.0U priority Critical patent/CN204299648U/en
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Abstract

The utility model discloses a kind of decompressor, comprise camshaft and gear, cam sleeve is located in the axis hole of gear; Wherein, decompression pin, decompression movable part, spring, back-up ring and spacer pin is also comprised; Back-up ring clamping is arranged on the end face of camshaft and gear, and back-up ring shelters from decompression pin in the axial direction; Spacer pin is located on gear face, and near decompression movable part, for limiting the planar movement scope of decompression movable part.The utility model by adding back-up ring and spacer pin on the end face of gear, can respectively gear shaft to radial direction on restriction decompression movable part scope of activities, reduce the active strokes of decompression movable part, therefore decompression movable part not easily drives decompression pin to rotate, device is easier to remain on decompression state, can promote effect of easing stress.The invention also discloses a kind of engine comprising above-mentioned decompressor, this engine is easy to remain on decompression state, and effect of easing stress is good.

Description

Engine and decompressor thereof
Technical field
The utility model relates to technical field of engineering machinery, particularly a kind of decompressor.In addition, the utility model also relates to a kind of engine comprising above-mentioned decompressor.
Background technology
Available engine adopts valve mechanism for top rod engine, and be made up of valve rocker, tappet, underlying rocking arm 101 and camshaft device 102, please refer to Fig. 1, Fig. 1 is the design schematic diagram of camshaft device of the prior art.Cam mechanism is in crankcase, and such is configured to underlying cam engine, and be a kind of more original structure, its advantage is simple structure, high reliability.To be valve actuating mechanism be shortcoming moves back and forth, and additional parts quality is large, and it is large that height turns inertia, and under high rotary speed working, tappet because inertia jump out of rocking arm, can produce noise, engine be in this form not suitable for the environment of relative high-speed cruising.Because the air pressure of huge discharge vehicle is than large, if use this camshaft, then the problem of difficulty in starting can be there is, so current this camshaft is only applicable to small displacement vehicle.In order to huge discharge vehicle can be adapted to, need to change camshaft structure.
In sum, how making this camshaft go for huge discharge vehicle, is the current technical issues that need to address of those skilled in the art.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of decompressor, goes for huge discharge vehicle.In addition the utility model additionally provides a kind of engine comprising above-mentioned decompressor.
For achieving the above object, the utility model provides following technical scheme:
A decompressor for engine, comprises camshaft and gear, and described cam sleeve is located in the axis hole of described gear; Wherein, decompression pin, decompression movable part, spring, back-up ring and spacer pin is also comprised;
Described decompression movable part is the plate of one piece of ear structure, and the centre of described decompression movable part is provided with the through hole of multidiameter structure, and one end of described spring is fixedly connected in described through hole, and the other end of described spring is fixedly connected on the end face of described gear; The inner side flexure plane of described decompression movable part is provided with otic placode, and described otic placode is provided with earhole homoaxial with described through hole;
Described decompression pin is semicylinder, and described decompression pin and described earhole adopt the socket connection of interference fit; Described decompression pin card is connected in the draw-in groove on described camshaft basic circle, and is inserted in the jack of described gear; Described spring is when free state, and the rectangle plane side of described decompression pin is in described draw-in groove;
The axis hole place of described gear is provided with boss; Described back-up ring clamping is arranged on the end face of described camshaft and described gear, and described back-up ring shelters from described decompression pin in the axial direction; Described spacer pin is located on gear face, and near described decompression movable part, for limiting the planar movement scope of described decompression movable part.
Preferably, the boss of described gear is provided with I-groove, the plane of described I-groove passes the central shaft of described jack.
A kind of engine, comprise described decompressor, wherein, described decompressor is the decompressor described in above-mentioned any one.
Adopt above-mentioned connected mode, when camshaft does not rotate or rotates unhappy, the position of decompression pin is as tilting in above-mentioned rectangle plane in slot, can by the push rod of gear opposite side when cam rotates, pin moment jack-up can be depressurized, reach effect of easing stress, so can realize starting.When camshaft fast rotational, decompression movable part because of centrifugal force be greater than spring force and dorsad gear centre move, rotate simultaneously, thus drive the rotation of decompression pin, decompression pin rectangle plane toward the outer side time, the height of decompression pin is then lower than camshaft basic circle, and thus push rod can not produce and beat, and decompression process terminates.
The utility model by adding back-up ring and spacer pin on the end face of gear, can respectively gear shaft to radial direction on restriction decompression movable part scope of activities, also define the axial scope of activities of decompression pin, thus reduce the active strokes of decompression movable part, therefore decompression movable part not easily drives decompression pin to rotate, device is easy to remain on decompression state, can promote effect of easing stress.The utility model additionally provides a kind of engine, and this engine is easy to remain on decompression state.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the design schematic diagram of camshaft device of the prior art;
Fig. 2 provides by the utility model the front view of the specific embodiment of decompressor;
Fig. 3 provides by the utility model in the specific embodiment of decompressor the schematic diagram of the movable part that reduces pressure;
Fig. 4 is the sectional view in H-H direction in Fig. 3;
Fig. 5 is the sectional view in J-J direction in Fig. 3.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Core of the present utility model is to provide a kind of decompressor, and this decompressor is easy to remain on decompression state.Another core of the present utility model is to provide a kind of engine comprising above-mentioned decompressor.
Please refer to Fig. 2, Fig. 2 provides by the utility model the front view of the specific embodiment of decompressor.
Decompressor comprises camshaft 1, gear 2, decompression pin 3, decompression movable part 7, spring 6, back-up ring 5 and spacer pin 8, and camshaft 1 is set in the axis hole of gear 2.
The cam base circle of camshaft 1 is provided with a draw-in groove got through, the center line of this draw-in groove and the centerline parallel of camshaft 1, the axis hole wall of gear 2 is provided with at least one jack, this jack and gear centre line parallel.
Please refer to Fig. 3 to Fig. 5, Fig. 3 provides by the utility model in the specific embodiment of decompressor the schematic diagram of the movable part that reduces pressure, and Fig. 4 is the sectional view in H-H direction in Fig. 3, and Fig. 5 is the sectional view in J-J direction in Fig. 3.
Decompression movable part 7 is the plate of one piece of ear structure, and the decompression structural middle of movable part 7 is provided with the through hole of multidiameter structure, for being fixedly connected with spring 6.One end of spring 6 adopts and connects and fixes connection in through-holes, and the other end of spring 6 is fixedly connected on the end face of gear 2; Spring 6 is for being connected to gear 2 end face by decompression movable part 7, and spring 6, to the pulling force of decompression movable part 7, makes decompression movable part 7 more near the centre position of gear, and on shift position, plays effect of contraction to decompression movable part 7.
The inner side flexure plane of decompression movable part 7 is provided with otic placode 4, otic placode 4 is a cylindrical plate, this plate is fixedly connected on the inner side of decompression movable part 7, otic placode 4 is provided with at least one earhole, this earhole is a semicircle orifice through hole, the axis that this earhole hangs down directly in the plane of above-mentioned decompression movable part 7, and with the axis being parallel of gear 2.
Decompression pin 3 is semicylinder, and as shown in Figure 5, decompression pin 3 and earhole adopt the socket connection of interference fit; Decompression pin 3 is connected in the draw-in groove on camshaft 1 basic circle, and decompression pin 3 can rotate freely in draw-in groove, and decompression pin 3 is inserted in the jack of gear 2, and the other end of decompression pin 3 stretches out the other end place of the draw-in groove on cam to gear 2.
The axis hole place of gear 2 is provided with boss; Back-up ring 5 clamping is arranged on the same side end face of camshaft 1 and gear 2, and back-up ring 5 shelters from decompression pin 3 in the axial direction, for limiting the axially-movable of decompression pin 3.
Gear 2 end face is provided with spacer pin 8, and when spring 6 is in free state, the rectangle plane side of decompression pin 3 is in draw-in groove, and now, this spacer pin 8 is arranged near decompression movable part 7, for limiting the planar movement scope of decompression movable part 7.
Alternatively, the boss of gear is provided with I-groove, the plane of I-groove passes the central shaft of jack, and for abdicating the activity space of decompression movable part 7, make the scope of activities of decompression movable part 7 clearer and more definite, stroke is more determined.
Adopt above-mentioned connected mode, when camshaft 1 does not rotate or rotates unhappy, the position of decompression pin 3 is as tilting in above-mentioned rectangle plane in slot, can by the push rod of gear 2 opposite side when cam rotates, pin moment jack-up can be depressurized, reach effect of easing stress, so can realize the startup of engine.When camshaft 1 fast rotational, decompression movable part 7 because of centrifugal force be greater than spring 6 elastic force and dorsad gear 2 center move, rotate simultaneously, thus drive the rotation of decompression pin 3, when the rectangle plane of decompression pin 3 is outside camshaft, the height of decompression pin 3 is then lower than the basic circle of cam, and thus push rod can not produce and beat, and decompression process terminates.
Embodiment provided by the utility model by adding back-up ring 5 and spacer pin 8 on the end face of gear, the scope of activities of decompression movable part 7 can be limited respectively in gear 2 axis and radial direction, also define the axial scope of activities of decompression pin 3, thus reduce the active strokes of decompression movable part 7, therefore decompression movable part 7 not easily drives decompression pin 3 to rotate, decompression pin 3 is easy to remain on edge-on state in slot, then device is easy to remain on decompression state, and then can promote effect of easing stress.
Except the decompressor that above-described embodiment provides, the utility model also provides a kind of engine comprising decompressor disclosed in above-described embodiment, and this engine is easy to remain on decompression state, and effect of easing stress is good.The structure of other each several parts of this engine please refer to prior art, repeats no more herein.
Above engine provided by the utility model and decompressor thereof are described in detail.Apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.

Claims (3)

1. a decompressor, comprise camshaft (1) and gear (2), described camshaft (1) is set in the axis hole of described gear (2); It is characterized in that, also comprise decompression pin (3), decompression movable part (7), spring (6), back-up ring (5) and spacer pin (8);
Described decompression movable part (7) is the plate of one piece of ear structure, the centre of described decompression movable part (7) is provided with the through hole of multidiameter structure, one end of described spring (6) is fixedly connected in described through hole, and the other end of described spring (6) is fixedly connected on the end face of described gear (2); The inner side flexure plane of described decompression movable part (7) is provided with otic placode (4), and described otic placode (4) is provided with earhole homoaxial with described through hole;
Described decompression pin (3) is semicylinder, and described decompression pin (3) and described earhole adopt the socket connection of interference fit; Described decompression pin (3) is connected in the draw-in groove on described camshaft (1) basic circle, and is inserted in the jack of described gear (2); Described spring (6) is when free state, and the rectangle plane side of described decompression pin (3) is in described draw-in groove;
The axis hole place of described gear (2) is provided with boss; Described back-up ring (5) clamping is arranged on the end face of described camshaft (1) and described gear (2), and described back-up ring (5) shelters from described decompression pin (3) in the axial direction; Described spacer pin (8) is located on described gear (2) end face, and near described decompression movable part (7), for limiting the planar movement scope of described decompression movable part (7).
2. device according to claim 1, is characterized in that, the boss of described gear is provided with I-groove, and the plane of described I-groove passes the central shaft of described jack.
3. an engine, comprises described decompressor, it is characterized in that, described decompressor is the decompressor described in the claims 1 or 2.
CN201420774702.0U 2014-12-10 2014-12-10 Engine and decompressor thereof Active CN204299648U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104454072A (en) * 2014-12-10 2015-03-25 重庆市银钢一通科技有限公司 Engine and decompressor thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104454072A (en) * 2014-12-10 2015-03-25 重庆市银钢一通科技有限公司 Engine and decompressor thereof

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