CN202926419U

CN202926419U - Starting pressure reducing device for diesel engine or gasoline engine

Info

Publication number: CN202926419U
Application number: CN 201220578193
Authority: CN
Inventors: 石中珍; 全德君; 陶永文
Original assignee: CHONGQING JINQIAO MACHINE MANUFACTURING CO LTD
Current assignee: CHONGQING JINQIAO MACHINE MANUFACTURING CO LTD
Priority date: 2012-11-06
Filing date: 2012-11-06
Publication date: 2013-05-08
Anticipated expiration: 2022-11-06

Abstract

The utility model discloses a starting pressure reducing device for a diesel engine or a gasoline engine, which comprises a camshaft provided with a timing gear and a centrifugal flying block arranged on the timing gear, wherein the lower end of the centrifugal flying block is connected with the end face of the timing gear through a centrifugal pin; a balance block is arranged on the end face; the lower end of the balance block is connected with the end face through a flying block pin; the upper end of the balance block is located on the outer side of the centrifugal flying block; the lower end part of the balance block is connected with the lower end part of the centrifugal flying block in a clamping manner; a spacing device is arranged on the end face of the timing gear; and the lower end of the centrifugal flying block is connected with the lower end of the balance block by a returning tension spring. The starting pressure reducing device has the advantages of reasonable structure and low manufacturing and mounting cost, and is applicable to high-speed starting and low-speed starting; failure of the returning tension spring during starting at a low speed is prevented; the starting pressure reducing device is reliable in operation and flexible in rotation; and the pressure reducing efficiency is improved.

Description

A kind of bavin, gasoline engine starting decompression device

Technical field

The utility model relates to a kind of startup decompressor, particularly a kind of bavin, gasoline engine starting decompression device.

Background technique

When bavin, gasoline engine starting, all to the gas that suck in cylinder be compressed, near the compression terminal point, gas pressure in cylinder is very high, as not reducing pressure, will make hand pull starting-up very difficult, require great effort very much, therefore, bavin, petrol engine are when starting, need to make valve be in suitable open mode, suitably reduce pressure, after bavin, gasoline engine starting, especially after reaching idling speed, need again valve to be in closed condition, the pressure-reducing function of decompressor is disappeared automatically, motor is in normal working.Now present, there are following shortcoming in the bavin that uses on market, gasoline engine starting decompression device:

1. some starts the decompressor complex structure, and fabricating cost is high, and component are more, and efficiency of assembling is low.

2. although it is low that some starts the too simple manufacture cost friendship of decompressor structure, but such structure can only be applicable to high-speed starting, during for low speed start, be that 350r/min is when following as camshaft rotation rotating speed, the problem that its reset tension spring can occur losing efficacy causes guaranteeing the normal operation of inlet and outlet door, simultaneously, startup decompressor simple in structure in use very easily deforms or weares and teares and causes decompression to lose efficacy.

Some to start decompressor structural design unreasonable, cause rotating dumb, the problem that decompression was lost efficacy appears.Adopt the pressure reduction structure of multipoint positioning rotation as some producer, if the size integrating error occur or the wearing and tearing of monolateral location in use occur, just easily produce decompressor clamping stagnation or stuck phenomenon.

The model utility content

The purpose of this utility model just is to provide and a kind ofly can be suitable for bavin, the gasoline engine starting decompression device that high-speed starting also can be suitable for low speed start.

the purpose of this utility model is to realize by such technological scheme, a kind of bavin, gasoline engine starting decompression device, comprise with the camshaft of timing gear and be arranged on the centrifugal piece that flies on timing gear, the described centrifugal lower end that flies piece is connected with the end face of timing gear by centrifugal lock, be provided with the equilibrium block that the lower end is connected with this end face by flying the piece pin on this end face, the upper end of described equilibrium block is positioned at centrifugal flying outside piece, the end of described equilibrium block lower end is connected with the centrifugal end, lower end that flies piece by clamping, be provided with limit stoper on the end face of timing gear, the described centrifugal lower end that flies piece is connected by reset tension spring with the lower end of equilibrium block.

In order to prevent reset tension spring fracture, be connected the lower end by extension spring locating stud and the centrifugal lower end that flies piece respectively and be connected in the two ends of described reset tension spring with equilibrium block.

Further, be provided with groove in the centrifugal end that flies the piece lower end, be provided with projection in the end of equilibrium block lower end, described projection is positioned at groove.

In the utility model, limit stoper is following three kinds:

The first is: described limit stoper is be arranged on the timing gear end face and be positioned at the centrifugal seam that flies piece and the equilibrium block outside.

The second is: described limit stoper is position limit pin A and the position limit pin B that is arranged on the timing gear end face, described position limit pin A is positioned at centrifugal flying outside piece, and corresponding with the centrifugal corner that flies piece, described position limit pin B is positioned at the equilibrium block outside, and corresponding with the corner of equilibrium block.

The third is: described limit stoper is to be arranged on flying the piece locating stud and being positioned at the centrifugal cylindrical void that flies on piece on timing gear, and the described piece locating stud that flies is positioned at cylindrical void.

Owing to having adopted technique scheme, that the utility model not only has advantages of is rational in infrastructure, manufacturing and assembly cost low, adopt its not only applicable high-speed starting, and applicable low speed start, prevented when low speed start, the problem that reset tension spring lost efficacy occurs, simultaneously, adopt its reliable operation, rotate flexibly, improve decompression efficient, taken existing decompressor because the dumb exhaust valve that makes of decompression can not in time cut out, and the problem that the Safety performance of bringing is low, energy loss is large and environmental pollution is large.

Description of drawings

Description of drawings of the present utility model is as follows:

Fig. 1 is the first structural representation of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the second structural representation of the present utility model;

Fig. 4 is the third novel structural representation of this signal.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail; but the utility model is not limited to these mode of executions; any on the present embodiment essence spirit improvement or substitute, still belong to the utility model claim scope required for protection.

embodiment 1: as Fig. 1, shown in 2, a kind of bavin, gasoline engine starting decompression device, comprise with the camshaft 2 of timing gear 1 and be arranged on the centrifugal piece 3 that flies on timing gear 1, the described centrifugal lower end that flies piece 3 is connected with the end face of timing gear 1 by centrifugal lock 4, be provided with the equilibrium block 6 that the lower end is connected with this end face by flying piece pin 5 on this end face, the upper end of described equilibrium block 6 is positioned at centrifugal piece 3 outsides of flying, the end of described equilibrium block 6 lower ends is connected with the centrifugal end, lower end that flies piece 3 by clamping, be provided with limit stoper on the end face of timing gear 1, the described centrifugal lower end that flies piece 3 is connected by reset tension spring 7 with the lower end of equilibrium block 6.

Wherein, the two ends of described reset tension spring 7 are connected by the lower end of being connected with equilibrium block in extension spring locating stud 8 and the centrifugal lower end that flies piece 3 respectively.Because centrifugal piece 3 and the equilibrium block 6 of flying is in order to improve wear resistance, both hardness ratios are higher, if both two end in contact direct and reset tension spring 7, the two ends of reset tension spring 7 can be rubbed by the centrifugal obtuse angle that flies piece 3 and equilibrium block 6, overlap, burr etc., if there is the problem that rubs, its consequence is unable to estimate, so extension spring locating stud 8 has been adopted at reset tension spring 7 two ends.

In the utility model, be provided with groove 9 in the centrifugal end that flies piece 3 lower ends, be provided with projection 10 in the end of equilibrium block 6 lower ends, described projection 10 is positioned at groove 9.Centrifugally fly piece 3 and equilibrium block 6 is in clamping, and be single supporting and location, make the centrifugal piece 3 that flies fast, flexibly, freely to rotarily drive reducing valve body under very little centrifugal force and open, and utilize very little reset tension spring power allow the reducing valve body returning quickly.

In the present embodiment, described limit stoper is be arranged on timing gear 1 end face and be positioned at the centrifugal seam 11 that flies piece 3 and equilibrium block 6 outsides.Limit by seam 11 and centrifugally fly piece 3 and scope that reducing valve body is opened, closed, satisfy reduction valve convex closure reduction valve when needs decompression not and can bending open, simultaneously, also reduced equilibrium block 6 and the centrifugal wearing and tearing that fly piece 3 access sections, postpone its working life.

The utility model is specially adapted to bavin, the decompression of petrol engine low speed start, i.e. camshaft rotation rotating speed is below 350r/min.

In the utility model, the centrifugal force that camshaft 2 produces is when rotated opened the centrifugal piece 3 that flies to counter clockwise direction, equilibrium block 6 is opened to clockwise direction, the centrifugal force direction that produces is just opposite, so the centrifugal centrifugal force that flies piece 3 has been cancelled a part, so reset tension spring 7 does not need too large spring force value just can guarantee that two fly piece keep in a basic balance when camshaft rotates.The rotation rotating speed of identical reason camshaft 2 does not need too that the higher position can allow the centrifugal piece 3 that flies open fast, neatly or return yet, and is stirred reducing valve body and beaten fast to be opened to and reduce pressure or stop decompression by the centrifugal piece shift fork that flies simultaneously.The pulling force of reset tension spring 7 guarantees that camshaft is when starting, reducing valve body is decompression state, when startup reaches certain rotating speed, and it is centrifugal when flying centrifugal force (centrifugal force after offsetting with the centrifugal force of equilibrium block) that piece 3 produces along with the rotation of camshaft 2 greater than the pulling force of reset tension spring 7, the centrifugal piece 3 that flies is to counterclockwise automatically opening, when opening, then drive the reducing valve body rotating opening to guarantee the normal operation of inlet and outlet door by the centrifugal piece shift fork that flies.

Embodiment 2: as shown in Figure 3, described limit stoper is position limit pin A12 and the position limit pin B13 that is arranged on timing gear 1 end face, described position limit pin A12 is positioned at centrifugal piece 3 outsides of flying, and corresponding with the centrifugal corner that flies piece 3, described position limit pin B13 is positioned at equilibrium block 5 outsides, and corresponding with the corner of equilibrium block 5.When the strength of gear teeth is limited, can adopt position limit pin A12 and position limit pin B13 to limit, perhaps when the decompressor installing space is limited, can only increase locating stud A12, so both can limit centrifugal its axial runout size that also can limit when flying the piece open angle.

Embodiment 3, and as shown in Figure 4, described limit stoper is to be arranged on flying piece locating stud 14 and being positioned at the centrifugal cylindrical void 15 that flies on piece 3 on timing gear 1, and the described piece locating stud 14 that flies is positioned at cylindrical void 15.

Claims

1. bavin, gasoline engine starting decompression device, comprise with the camshaft (2) of timing gear (1) and be arranged on the centrifugal piece (3) that flies on timing gear (1), the described centrifugal lower end that flies piece (3) is connected with the end face of timing gear (1) by centrifugal lock (4), it is characterized in that: be provided with the equilibrium block (6) that the lower end is connected with this end face by flying piece pin (5) on this end face, the upper end of described equilibrium block (6) is positioned at centrifugal flying outside piece (3), the end of described equilibrium block (6) lower end is connected with the centrifugal end, lower end that flies piece (3) by clamping, be provided with limit stoper on the end face of timing gear (1), the described centrifugal lower end that flies piece (3) is connected by reset tension spring (7) with the lower end of equilibrium block (6).

2. bavin as claimed in claim 1, gasoline engine starting decompression device, it is characterized in that: the two ends of described reset tension spring (7) are connected 6 with the centrifugal lower end that flies piece (3) with equilibrium block by extension spring locating stud (8) respectively) the lower end be connected.

3. bavin as claimed in claim 2, gasoline engine starting decompression device, it is characterized in that: be provided with groove (9) in the centrifugal end that flies piece (3) lower end, end in equilibrium block (6) lower end is provided with projection (10), and described projection (10) is positioned at groove (9).

4. as claim 1,2 or 3 described bavins, gasoline engine starting decompression device, it is characterized in that: described limit stoper is for being arranged on timing gear (1) end face and being positioned at the centrifugal seam (11) that flies outside piece (3) and equilibrium block (6).

5. as claim 1,2 or 3 described bavins, gasoline engine starting decompression device, it is characterized in that: described limit stoper is for being arranged on the position limit pin A(12 on timing gear (1) end face) and position limit pin B(13), described position limit pin A(12) be positioned at centrifugal flying outside piece (3), and corresponding with the centrifugal corner that flies piece (3), described position limit pin B(13) be positioned at outside equilibrium block (5), and corresponding with the corner of equilibrium block (5).

6. as claim 1,2 or 3 described bavins, gasoline engine starting decompression device, it is characterized in that: described limit stoper is for to be arranged on flying piece locating stud (14) and being positioned at the centrifugal cylindrical void (15) that flies on piece (3) on timing gear (1), and the described piece locating stud (14) that flies is positioned at cylindrical void (15).