CN201386590Y

CN201386590Y - Two-stage automatic gear-shifting engine

Info

Publication number: CN201386590Y
Application number: CN200920039784U
Authority: CN
Inventors: 刘小川; 周春霞
Original assignee: WUXI CITY SIDADON VEHICLE AND ENGINE CO Ltd
Current assignee: WUXI CITY SIDADON VEHICLE AND ENGINE CO Ltd
Priority date: 2009-04-29
Filing date: 2009-04-29
Publication date: 2010-01-20
Anticipated expiration: 2019-04-29

Abstract

The utility model relates to a two-stage automatic gear-shifting engine for a portable motorcycle or a power-assisted vehicle. The two-stage automatic gear-shifting engine is characterized in that a right crank at one side of a crankshaft is provided with a low-speed clutch and a high-speed clutch, the low-speed clutch and the high-speed clutch are respectively connected with a low-speed transmission gear and a high-speed transmission gear, a high-speed clutch friction disc and a low-speed clutch friction disc are fixedly connected back to back, at least three lines of spiral guide grooves are arranged on a starting shaft, and bidirectional ratchet wheels are arranged in the spiral guide grooves between final gears and starting chain wheels. With the characteristics of simple as well as compact structure, low manufacturing cost and simple operation, the two-stage automatic gear-shifting engine respectively carries out power transmission by two pairs of high-speed gear pairs and low-speed gear pairs when in high-speed and low-speed states, so as to realize that the automatic gear-shifting function of power transmission of the engine is completed by different clutches through the changing of rotating speed; The bidirectional ratchet wheels are adopted on the starting shaft, so that the engine can be started by reversely stepping a pedal on the starting shaft, and the operation is convenient as well as quick; under the circumstance of deficient fuel oil, manpower driving can be realized by directly stepping the pedal.

Description

Two-stage automatic shift engine

Technical field

The utility model relates to a kind of motor, especially relates to a kind of gently rubbing or the two-stage automatic shift engine of booster car, and this motor has manpower driving, foot pedal starting and electric start-up function concurrently.

Background technique

Existing gently rubbing or the most of single clutch structure that adopts of motor that booster car is used do not have gear, though this structure is simple, do not have transforming gear when travelling, and exists engine speed too high, the engine overheat phenomenon.Also have in the market can speed-change and gearshift gently rub or booster car, it is in motion if want the gear shift position, just must make engine retard earlier, spur clutch handle then, after making clutch separation, pin is stepped on Shift lever and is stirred reverse shift fork again, make the different gear mesh engagements on main shaft and the countershaft, realize shiftedly, need use both hands and feet complex operation during gear shift, and this gently rubbing or the speed change engaging and disengaging gear complex structure of booster car, the volume of motor is big, and the poor rigidity of moving element, manufacture cost are also higher.In addition, existing gently rubbing or the common Starting mode that adopts foot-operated recoil of booster vehicle engine, this Starting mode is to realize separating and engage between starting shaft and the starting gear by Kick-start ratchet and Kick-start ratchet spring, the structure of this starting mechanism is complicated, when starting, clutch must be in neutral position, inconvenient operation; And the starting ratchet spring in use easily comes off or resistance lost efficacy, and makes starting shaft and starting gear can not realize reliable separation, thereby influences the reliability and the working life of starting mechanism, and starting shaft and starting gear can send noise in separation process.

The model utility content

The applicant has carried out research and improved at above-mentioned problem, and a kind of two-stage automatic shift engine is provided, and realizes the automatic gear-shifting of motor and has the foot pedal starting function concurrently and electric start-up function, and is simple to operate, and compact structure is reliable.

In order to solve the problems of the technologies described above, the utility model adopts following technological scheme:

A kind of two-stage automatic shift engine, comprise casing, bent axle, main shaft and starting shaft, cylinder assembly is in a side of casing, cylinder piston connects bent axle by connecting rod, the left crank of bent axle one side connects magnetogenerator, and the right crank of described bent axle opposite side is provided with low-speed clutch and high-speed clutch, and low-speed clutch and high-speed clutch are centrifugal shoe block type clutch, on right crank, the high-speed clutch driving disc is connected with the high speed driving gear low-speed clutch driving disc by the spline device; The low-speed clutch friction disk is connected with low-speed active gear, the high-speed clutch friction disk is fixedlyed connected with the low-speed clutch friction disk is back-to-back, low-speed active gear and low-speed clutch friction disk by the one-way element device on right crank, high speed driving tooth bye is enclosed within on the shaft shoulder of low-speed active gear, low speed driven gear and driven sprocket by the one-way element device on main shaft, the high speed driven gear by the flat key device on main shaft; Low-speed active gear and the engagement of low speed driven gear, high speed driving gear and the engagement of high speed driven gear;

Starting shaft is provided with at least three row spiral guide slots, and two-way ratchet is nested in the spiral guide slot, and limiting board is sleeved in the circular groove on the two-way ratchet outer ring, and the outer end sliding device of limiting board is on casing in the guide chute; The starting chain bye that has ratchet is enclosed within a side of two-way ratchet on the starting shaft, has the opposite side of the final gear of ratchet by bearing means two-way ratchet on starting shaft; Driven sprocket and starting sprocket wheel are by chain transmission, and main shaft is provided with driving gear, final gear by bearing means on starting shaft, driving gear and final gear engagement, output sprocket is fixedly mounted on the final gear.

Further:

Device has starting gear on the left crank of described bent axle, and starting gear connects actuating motor by gear driving pair.

The number of teeth of described high speed driving gear is greater than the number of teeth of low-speed active gear, and the reduction speed ratio of low speed gear pair is greater than the reduction speed ratio of high-speed gear pair.

The helix angle of described spiral guide slot is between 50 °～80 °.

The helix angle of described spiral guide slot is 60 °.

Technique effect of the present utility model is:

The disclosed a kind of two-stage automatic shift engine of the utility model, simple and compact for structure, low cost of manufacture, simple to operate, reliable; Adopt the two-stage centrifugal shoe block type clutch form of low-speed clutch and high-speed clutch, the two-stage clutch disk adopts linkage structure back-to-back, and in high speed, during lower-speed state, respectively by two pairs of high-speed gear pair and the secondary transmission of low speed gear power, structure is significantly simplified, and reduction manufacture cost, when low engine speed is rotated, power drives the low speed gear auxiliary driving by low-speed clutch, after engine speed promotes, power drives the high gear auxiliary driving by high-speed clutch, the problem of complex operation when having solved gear shift in the prior art, realized finishing the automaitc shfit function of engine power transmission by different clutches, impacted between the gear when having avoided hand shift in the prior art and gear destruction and noise that collision causes, prolonged the working life of gear by change in rotational speed, simultaneously, need not operation and can realize automatically having reduced engine speed by clutch gearshift, avoid the generation of engine overheat phenomenon; On starting shaft, adopt two-way ratchet, oppositely pedal the foot-operated ato unit that gets final product on the starting shaft, convenient to operation, good reliability, mechanism's long service life, under the situation of Low oil Fuel, can be directly foot-operated by pedaling, make two-way ratchet combine transferring power with final gear, realization gently rubs or the manpower of booster car drives; Starting the airborne device actuating motor, actuating motor is piloted engine by gear transmission, and is simple to operation.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is an actuating motor linkage structure schematic representation.

Fig. 3 is the structural representation of centrifugal hoof piece.

Fig. 4 is the view of the utility model when foot-operated the startup.

Among the figure, the final gear 26-of the centrifugal hoof piece of the right crank 3-of the left crank 202-of 1-casing 2-bent axle 201-main shaft 4-starting shaft 401-spiral guide slot 5-cylinder 501-cylinder piston 6-connecting rod 7-magneto 701-magneto flywheel 8-high-speed clutch 801-high-speed clutch driving disc spacing pressing 802-high-speed clutch frictional disk 9-low-speed clutch 901-low-speed clutch driving disc spacing pressing 902-low-speed clutch frictional disk 10-low-speed active gear 11-high speed driving gear 12-pin 13-14-extension spring 15-spring stop piece 16-isolator 17-low speed driven gear 18-isolator 19-high speed driven gear 20-flat key 21-driven sprocket 22-bidirectional ratchet 23-limiting plate 24-starting sprocket wheel 25-travelling gear 27-output chain gear 28-bearing 29-actuating motor 30-starter toothed wheel 31-needle bearing 32-isolator

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

As shown in Figure 1, the utility model comprises casing 1, bent axle 2, main shaft 3 and starting shaft 4, cylinder 5 devices are in a side of casing 1, cylinder piston 501 connects bent axle 2 by connecting rod 6, the left crank 201 of bent axle 2 one sides connects magnetogenerator 7, the right crank 202 of bent axle 2 opposite sides is provided with low-speed clutch 9 and high-speed clutch 8, low-speed clutch 9 and high-speed clutch 8 are centrifugal shoe block type clutch, low-speed clutch driving disc 901 by the spline device on right crank 202, high-speed clutch driving disc 801 is connected with high speed driving gear 11, in the present embodiment, high-speed clutch driving disc 801 is structure as a whole with high speed driving gear 11.As Fig. 1,3, low-speed clutch driving disc 901 and high-speed clutch driving disc 801 connect 3 centrifugal hoof pieces 13 by pin 12 respectively, and extension spring 14 is installed in the groove of centrifugal hoof piece 13, and spacing for extension spring 14 with 3 flat spring catch 15.Low-speed clutch friction disk 902 is riveted together with low-speed active gear 10, high-speed clutch friction disk 802 is riveted together with the 902 back-to-back punching presses of low-speed clutch friction disk, low-speed active gear 10 is installed on right crank 202 by one-way element 16 with low-speed clutch friction disk 902, high speed driving gear 11 skies are enclosed within on the shaft shoulder of low-speed active gear 10, can make structure compact more like this.On main shaft 3, high speed driven gear 19 installs on main shaft 3 by flat key 20 low speed driven gear 17 by one-way element 18 devices, low-speed

active gear

10 and 17 engagements of low speed driven gear, high

speed driving gear

11 and 19 engagements of high speed driven gear.The number of teeth of high speed driving gear 11 is greater than the number of teeth of low-speed active gear 10, and the reduction speed ratio of low speed gear pair (low-speed active gear 10 and low speed driven gear 17) is greater than the reduction speed ratio of high-speed gear pair (high speed driving gear 11 and high speed driven gear 19).

Starting shaft 4 is provided with four row spiral guide slots 401, two-way ratchet 22 is nested in the spiral guide slot 401, the helix angle of spiral guide slot 401 is 60 °, usually the best practical range of spiral guide slot 401 helix angles is between 50 °～80 °, limiting board 23 is sleeved in the circular groove on two-way ratchet 22 outer rings, the outer end sliding device of limiting board 23 in the guide chute (not drawing in the drawings), is guaranteed two-way ratchet 22 move left and right on starting shaft 4 on casing 1.Starting sprocket wheel 24 skies that have ratchet are enclosed within a side of two-way ratchet 22 on the starting shaft 4, have the opposite side of the final gear 25 of ratchet by bearing 28 devices two-way ratchet 22 on starting shaft 4, that is to say, two-way ratchet 22 is installed between final gear 25 and the starting sprocket wheel 24, spiral guide slot 401 can convert rotatablely moving of starting shaft 4 to two-way ratchet 22 move axially, make two-way ratchet 22 respectively with

final gear

25,24 combinations of starting sprocket wheel, when the ratchet engagement on two-way ratchet 22 and the starting sprocket wheel 24, the power of starting shaft 4 is delivered to starting sprocket wheel 24 by two-way ratchet 22, when the ratchet engagement on two-way ratchet 22 and the final gear 25, the power of starting shaft 4 is delivered to final gear 25 by two-way ratchet 22.Driven sprocket 21 installs on main shaft 3 by one-way element 18, with low speed driven gear 17 shared one-way elements 18, driven sprocket 21 and starting sprocket wheel 24 are by chain transmission, main shaft 3 is provided with driving gear 26, driving gear 26 passes through bearing 28 devices on starting shaft 4 with final gear 25 engagements, final gear 25.Output sprocket 27 is fixedly mounted on the final gear 25, rotates with final gear 25.

As shown in Figure 2, device has starting gear 30 on the left crank 201 of bent axle 2, starting gear 30 connects actuating motor 29 by the two-stage gear transmission, starting gear 30 installs on the left crank 201 of bent axle 2 by needle bearing 31, the flywheel 701 of magnetogenerator 7 is connected with starting gear 30 by one-way element 32, inner ring sleeve on the starting gear 30 is gone in the one-way element 32, and one-way element 32 is between magnetogenerator flywheel 701 end faces and starting gear 30, and the end face of magnetogenerator flywheel 701 is connected with one-way element 32.When using actuating motor 29 to pilot engine, after connecting storage battery, actuating motor 29 rotates, drive starting gear 30 by the two-stage gear transmission, rotate thereby drive one-way element 32, magnetogenerator flywheel 701, left crank 201 and bent axle 2, thus the starting of drive motor.When engine speed (being the rotating speed of bent axle 2 left cranks 201) during greater than the rotating speed of actuating motor 29, since the single effect of one-way element 32, normal working of engine, and actuating motor 29, starting gear 30 and two-stage gear are not worked.

In the utility model, one-way element 16, one-way element 18 and one-way element 32 manufacture and design by prior art.

During the foot pedal starting motor, see Fig. 4, directly oppositely pedal and foot-operated two-way ratchet 22 on the starting shaft 4 is combined with ratchet on starting sprocket wheel 24, driving starting sprocket wheel 24 by starting shaft 4 by two-way ratchet 22 like this rotates, the driven sprocket 21 that drives on the main shaft 3 by chain rotates again, and drives low speed driven gear 17 by one-way element 18, and low speed driven gear 17 drives low-speed active gear 10 and rotates, and by one-way element 16 right cranks 202 of drive and bent axle 2 rotations, thereby ato unit.

Gently rub or booster car under the situation of Low oil Fuel, gently rub or booster vehicle engine quits work, need to adopt manpower to drive, see Fig. 1, directly foot-operated by pedaling, make starting shaft 4 drive two-way ratchet 22 and move axially with ratchet on the final gear 25 and combine, final gear 25 rotates, simultaneously final gear 25 drives the output sprocket 27 that is installed together with it, is outputed power and is driven by output sprocket 27 and gently rub or booster car moves ahead, and gently rubs this moment or booster car is the manpower driving.Final gear 25 rotates and drives main shafts 3 by driving gear 26 simultaneously and rotate, because of driven sprocket 21 and low speed driven gear 17 are installed on the main shaft 3 main shaft 3 idle running by one-way element 18.

After engine start, the right crank 202 of bent axle 2 drives 901 rotations of low-speed clutch driving disc, drive centrifugal hoof piece 13 rotations that are installed on the low-speed clutch driving disc 901 simultaneously, when rotating speed reaches it in conjunction with rotating speed, centrifugal hoof piece 13 opens, contact with low-speed clutch friction disk 902, because low-speed clutch friction disk 902 and low-speed active gear 10 are riveted together, therefore power passes to low speed driven gear 17 by low-speed active gear 10, low speed driven gear 17 drives main shaft 3 by one-way element 18, the final gear 25 that driving gear 26 on the main shaft 3 drives on the starting shaft 4 rotates, and realize power output by the output sprocket 27 that links together with final gear 25, drive and gently rub or booster car low speed moves ahead.Meanwhile main shaft 3 drives 19 rotations of high speed driven gear, and drive high speed driving gears 11 and be installed in also rotation together of centrifugal hoof piece 13 on the high-speed clutch driving disc 801 by high speed driven gear 19, because on the shaft shoulder of high speed driving gear 11 empty cover low-speed active gear 10, and the number of teeth of high speed driving gear 11 is greater than the number of teeth of low-speed active gear 10, the reduction speed ratio of low speed gear pair (low-speed active gear 10 and low speed driven gear 17) is greater than the reduction speed ratio of high-speed gear pair (high speed driving gear 11 and high speed driven gear 19), centrifugal hoof piece 13 rotating speeds in the centrifugal hoof piece 13 rotating ratio low-speed clutchs 9 in the high-speed clutch 8 are little many, therefore when the centrifugal hoof piece 13 of low-speed clutch 9 has just combined with low-speed clutch friction disk 902, centrifugal hoof piece 13 in the high-speed clutch 8 can not combine with high-speed clutch friction disk 802, high speed driving gear 11 carries out no-load idle running, this moment, high-speed clutch 8 was not worked, and power is transmitted by low-speed clutch 9 fully.After the continuous rising of rotating speed, on reaching high-speed clutch driving disc 801 centrifugal hoof piece 13 in conjunction with rotating speed the time, centrifugal hoof piece 13 opens, combine with high-speed clutch friction disk 802, this moment, the high speed rotating of bent axle 2 right cranks 202 directly was delivered on the main shaft 3 by low-speed clutch 9, high-speed clutch 8, high speed driving gear 11 and high speed driven gear 19.At this moment, because the reduction speed ratio of low speed gear pair (low-speed active gear 10 and low speed driven gear 17) is greater than the reduction speed ratio of high-speed gear pair (high speed driving gear 11 and high speed driven gear 19), the rotating speed of high speed driven gear 19 is higher than low speed driven gear 17, at this moment one-way element 18 plays a role, the idle running of low speed driven gear 17 no-loads, main shaft 3 is with high speed driven gear 19 high speed rotating, and by driving gear 26, final gear 25 and output sprocket 27 realization power outputs, drive and gently rub or the booster car high forward, thus the automaitc shfit of realization motor.When motor by at a high speed to low-range reduction the time, its process is opposite with said process.

Claims

1. a two-stage automatic shift engine comprises casing, bent axle, main shaft and starting shaft, and cylinder assembly is in a side of casing, and cylinder piston connects bent axle by connecting rod, and the left crank of bent axle one side connects magnetogenerator, it is characterized in that:

The right crank of described bent axle opposite side is provided with low-speed clutch and high-speed clutch, low-speed clutch and high-speed clutch are centrifugal shoe block type clutch, on right crank, the high-speed clutch driving disc is connected with the high speed driving gear low-speed clutch driving disc by the spline device; The low-speed clutch friction disk is connected with low-speed active gear, the high-speed clutch friction disk is fixedlyed connected with the low-speed clutch friction disk is back-to-back, low-speed active gear and low-speed clutch friction disk by the one-way element device on right crank, high speed driving tooth bye is enclosed within on the shaft shoulder of low-speed active gear, low speed driven gear and driven sprocket by the one-way element device on main shaft, the high speed driven gear by the flat key device on main shaft; Low-speed active gear and the engagement of low speed driven gear, high speed driving gear and the engagement of high speed driven gear;

2. according to the described two-stage automatic shift engine of claim 1, it is characterized in that: device has starting gear on the left crank of described bent axle, and starting gear connects actuating motor by gear driving pair.

3. according to the described two-stage automatic shift engine of claim 1, it is characterized in that: the number of teeth of described high speed driving gear is greater than the number of teeth of low-speed active gear, and the reduction speed ratio of low speed gear pair is greater than the reduction speed ratio of high-speed gear pair.

4. according to the described two-stage automatic shift engine of claim 1, it is characterized in that: the helix angle of described spiral guide slot is between 50 °～80 °.

5. according to the described two-stage automatic shift engine of claim 4, it is characterized in that: the helix angle of described spiral guide slot is 60 °.